Clamping and spreading device

The invention relates to a clamping and spreading with a slidably mounted slide, the displacement movement in a clamping direction operable with the blocking erschieblichkeit in the opposite direction and their shifting movement in a spreading direction is operable with Blocking of the displaceability in the opposite direction, the direction of offset can be switched between the clamping direction and the spreading direction.

Such clamping and spreading, for example, from the WO01 / 56747 A1. Clamping and spreading devices are also known from US 4257.584 and US 5,593,147 known.

The invention is based on the object, a clamping and spreading provide the above-mentioned type, which easy to manufacture and in a simple manner is operated.

This object is achieved in the aforementioned clamping and spreading inventively achieved in that a movable positioning element provided is holding which actuating elements for the guide rail, wherein in Depending on the position of the positioning element, the displacement movement the slide in the clamping direction or in the spreading direction operable.

By the movable and in particular sliding positioning (Which may be constructed in one or more parts) can be the actuating elements position it so that the slide rail in the clamping direction or can be moved to the spreading direction. It can be characterized on a simple way for the ability to switch shift operation of the realize slide between clamping direction and the spreading direction.

In particular it is possible with a single hand lever to the actuating elements to act so that a single lever on a shift actuator possible in the tensioning direction and in the spreading direction is. The handle lever can be arranged in a simple manner so that, when a pivotal movement in one direction depending on the position of the positioning element a displacement of the slide in the clamping direction or The spreading occurs.

Furthermore, it is possible by the movable positioning member, a Handle-free to arrange. It can be particularly arranged such that the clamping and spreading reduced dimensions having. He let also be positioned so that the clamping and spreading operate with one hand is. For example, it is possible to arrange the lever handle so, that it are pivoted for shifting operation on the slide to can. It is then not laterally beyond the clamping and spreading addition. This can be a simple handling of the clamping and achieve spreading.

On the movable positioning element of the assembly of the clamping and Spreading simplified during manufacture. The number of components can be kept low. For example, it is possible to use only two actuators provide that in as locking elements for the displaceability the opposite direction of an actuator associated displacement direction can act.

Conveniently, the positioning member is in the direction of displacement of the slide slidably. It can then be on the slide, a slide guide deploy, so that no separate displacement guide must be formed within a housing.

For the same reason it is advantageous if the positioning of the Slide rail is mounted displaceably on the slideway, and in particular is.

It is particularly advantageous if a first for the positioning Position is provided in which the displacement of the slide rail in the Spreading direction is operable. The first position is an excellent Position. In this first position, the positioning member is arranged to that just only a shift operation of the slide rail in the spreading direction is possible. Preferably, on the positioning of the positioning element in the first position, the displaceability of the slide in the Opposite direction (the stretching direction) blocked.

It is advantageous if the first position is fixed, for example by locking is. This is just the first position as an excellent position defined and this can be adjusted in a defined manner for an operator.

For the same reason it is advantageous if one of the positioning element second position is provided as the excellent position in which the displacement the slide in the clamping direction is operable.

It is then also advantageous if the second position is fixable.

It is particularly advantageous if a movement of the positioning element a switching means for switching the direction of movement the slide can be actuated. The positioning member may also be part of the be switching. When there is a switchover, then the Positioning moves and indeed in a position (in particular the first Position or the second position) in which the slide rail in the spreading direction only slidably or only in the tensioning direction.

It is favorable, if the switching device, the positioning in a first position can be brought, in which the guide rail in the spreading direction is displaceable and can be brought into a second position in which the Slide in the clamping direction is displaced. This can be the displacement direction switch on the positioning.

A clamping and spreading the invention can be easily Manufacture example, when the switching means comprises a mechanical switch which is which is coupled to the positioning element. About this mechanical Switches can be moved, the positioning and in particular move. For example, a rotary switch may be provided, which so is arranged and formed and is coupled to the positioning element, that a rotary motion of the mechanical switch in a Translational motion of the positioning is implemented.

It is particularly advantageous if an actuator as a blocking element for blocking the displaceability of the slide in the opposite direction formed of the actuator associated with the direction of displacement is. This can be the number of parts for the sliding mechanism and locking mechanism of the clamping and spreading invention minimize. Furthermore, the corresponding device can thereby also compact and space-saving form, since in addition to the actuators no separate locking elements have to be provided.

It is advantageous if at least one contact surface is provided to a to keep locking element in a locked position. Such a contact surface can be a blocking element, for example in a tilting position hold, which the displacement of the slide in the released direction allowed, and the displaceability locks in the opposite direction. can via the contact surface keep the locking element in its locking position (tilted position).

It is advantageous if an actuator at least one return spring assigned. When applied to an actuator force is, then, such a return spring is compressed, for example. After Completion of the application of force is the actuator to its original Position is reset so that a new key-press operation is feasible. This also makes it possible that a pivot lever (lever handle) is pivoted back into its initial position.

Conveniently, the associated the actuator at least one Return spring arranged on the positioning element, said positioning element is advantageously designed as a spring cage. The movable positioning then makes in his excellent positions for a provision the respective actuator.

In one embodiment, the positioning member holds a first actuator for actuation of the sliding movement of the slide in the Tensioning direction.

It is favorable when the first actuating element for the blocking element the displaceability in the expanding direction acts.

Further, the positioning member holds a second actuating element for Actuating the displacement guide of the slide rail in the spreading direction. It is then also advantageous if the second actuator as a blocking element for the displaceability of the slide acts in the tensioning direction. The number of components required can be kept low by. Thereby in turn, allows the clamping and spreading invention compact build and easy to manufacture.

Conveniently, between the first actuator and the second Actuator at least one spring arranged. Preferably between the first actuating element and the second actuating element based arranged on both sides of the guide rail a spring. additionally nor can a spacer element between the two actuators be arranged. By the spring, the two actuators may each other support, provision being made for a provision. The spacer can also serve as the leadership which the mounting of the positioning as a spring cage with simplified jigs.

Conveniently, for actuating the displacement of the slide at least a grip lever provided. This handle lever, which piece or may be multi-part design, acts on the respective actuator elements, to this tilting the slide, and then for a to provide forward thrust.

In particular, via the at least one gripping lever, an actuating element tiltable and displaceable to bring the slide to shift to can.

It is particularly advantageous if a single handle lever is provided, which is so arranged and formed that it depending on the position of the positioning element a first actuating element for the displacement of the slide rail in the clamping direction or on a second actuating element for displacing the slide rail in the spreading direction acts. By the movable Positioning requiring only one hand lever, the displacement of Slide to operate in the tensioning direction and in the spreading direction. about Movement and in particular displacement of the positioning is switchable between these two directions. It may then be the invention Clamping and spreading build compact. Since only a single lever handle must be provided, the space requirement can be low hold. The handle lever can again be arranged so that the invention Clamping and spreading operated easily and is especially one-handed use. Furthermore, this is also the production simplified.

In particular, a handle lever, the first actuating element and the second actuator depending on the position of the positioning in opposite Directions tilted (and displaced). By tilting in opposite directions and corresponding tilting and motion can be via the respective actuator, the slide in a take direction or in the other direction (opposite direction).

It is advantageous if the at least one grip lever via a shaft stub shaft Stumme taper bearings pivotally mounted on a housing is mounted. The handle lever can in this case, starting from a (inner) storing surface of the housing, so that no shaft passing through the housing have to be. It must then also no appropriate location for such a Shaft are provided. Thus, the assembly is simplified and it can to achieve a compact design.

It is advantageously provided that the shaft stub shaft Stumme taper bearings is arranged above the positioning element. Thereby then can appropriate lever tabs of the handle lever in a simple manner access the actuators to thereby turn the Jigs the slide to move.

It is provided that the at least one gripping lever is arranged and designed is that during pivoting on the slide rail to a shift the slide can be actuated. This results in a simple Operability. In particular, one-handed operation can be realized, if a corresponding counter-gripping element is provided.

In this context it is advantageous if the at least one lever handle seated at the rail when not operating at an acute angle. This angle lies for example in the order of 40 °. An operator can then the handle lever and a helper handle member having a hand and pull the handle lever in the direction of the slide pivot (in direction of the handle member) so as to actuate the displacement of the slide. By Positioning of the positioning element is the shift towards the Slide set.

It is particularly advantageous if the at least one lever handle a counter-gripping element is provided for one-hand operation.

It is favorable in this connection if the counter-gripping element along the slide is oriented. This allows the dimensions of the present invention Clamping and spreading keep low and it is a ease of use allows.

In particular, the slide is slidably mounted in counter-gripping element. Over the counter grip element can then be a further shift camp for deploy the slide in order to store them largely free of play can.

In an advantageous embodiment, a release member (release lever) is provided, on which a locking element can be brought into a non-blocking position is. The release member may be formed in one piece or several pieces. In the Practice often occurs the case that the slide rail moved over long distances and must be such a shift on the actuating elements is too time consuming. About the release element can be directly on the respective acting locking element is accessible and this will be achieved and an operator can then move the slide manually. furthermore , a clamping position of the device (with clamped work piece) be solved.

In particular, the release element is designed such that it depends on the Position of the positioning of the respective locking element acts. Thereby it is achieved that the release element just to the relevant blocking element acts. An operator can then slide regardless resolve whether operability of the slide in the clamping direction or in Spreading direction is set.

In a constructive simple embodiment, the release element is pivotally disposed. In particular, the release element is designed as a release lever. By pivoting can be acted on a lock member in such a way that its locking effect is canceled.

For example, the release member is attached to a handle lever for operating the mounted pivoting the slide. This can be a simple and space-saving manner a corresponding pivot bearing form.

In particular, the release element is arranged and designed such that a Pivot direction for solving whatever the position of the positioning element is. This makes the operation easier.

There is advantageously provided a housing in which the slide is mounted displaceably. The housing, the displacement mechanism and record locking mechanism for the slide. This is housed there protected.

Conveniently, the positioning member is guided in the housing so that it just is protected in its displaceability of external influences.

For example, a housing cover is provided. This can be the assembly Clamping and spreading device of the invention during the preparation of simplify.

It is particularly advantageous if the housing is designed such that the moving parts are inserted for the displacement mechanics. The corresponding Contact surfaces and receiving portions are preferably integrally manufactured in the respective housing part. The mechanism can then inserted be without additional elements such as pin shafts or the like must be provided. The assembly is thus greatly simplified. about a housing cover which is fixed to the rest of the housing, can be then close the cover.

Conveniently, a conditioning element for workpieces is connected to the housing. This contact element can be a separate part with the Housing is connected. but it can also be a one piece on the acting housing formed contact element.

Further, a contact element for workpieces with the slide is connected. This contact element is seated in particular fixed to the side rail. In between the two contact elements can then workpieces clamped when these are moved toward each other. If the system elements apart are moved away, then can appropriate spreading forces to workpieces exercise.

The following description of a preferred embodiment is used in the Conjunction with the drawings to illustrate the invention. It show:<dl tsize="7"><dt>figure 1</dt><dd>a partial sectional view of an embodiment of a Clamping and spreading the invention;</dd><dt>figure 2</dt><dd>an enlarged view of region A of Figure 1;</dd><dt>figure 3</dt><dd>a sectional view of the clamping and spreading in accordance Figure 1 along line 3-3;</dd><dt>figure 4</dt><dd>a partial sectional view of mechanical elements for movement a slide of the clamping and spreading in accordance Figure 1 at unverschwenktem Handle;</dd><dt>figure 5</dt><dd>the same view as Figure 4 in a moment image during Pivoting a handle lever and</dd><dt>figure 6</dt><dd>the same view as Figures 4 and 5 as a snapshot during the pivotal movement of a release member.</dd></dl>

An embodiment of an inventive clamping and spreading, which is in particular designed as a one-handed clamp, is shown in Figure 1 in shown partially sectional view and designated as a whole by 10. The span and Spreader 10 has a slide 12, which in itself a Longitudinally extending 14. The slide 12 is profiled (Figure 3). It has on opposite long sides of indentations 16a, 16b. The slide 12 is preferably made of a metallic material.

In the region of one end 18 of the slide 12, a contact element 20 arranged for workpieces. This contact element 20 is in particular firmly the slide 12. It can be provided that the contact element 20 is releasably attached to the side rail 12 or firmly fixed on this is. The contact element 20 may be integrally formed on the guide rail 12 or it may itself be a separate element, which subsequently the slide rail 12 is fixed. For example, the contact element 20 from a plastic material.

The contact element 20 has a first contact surface 22nd This first contact surface 22 is preferably planar. The bearing surface 22 is based on opposite short sides 24a, 24b of the guide rail via this addition, so that a workpiece above or below the slide rail 12 can be applied.

The contact element 20 has a further second contact surface 26 which the first abutment surface is located 22 opposite. The second abutment surface 26 is an outer surface. This second contact surface 26 is preferably flat.

The slide 12 is displaceably mounted in a housing 28, and in particular slidably mounted. Relative to this housing 28, the guide rail 12 parallel to the longitudinal direction in a tensioning direction 30 and in a spreading direction 32 slidably. The spreading direction 32 is the opposite direction to the clamping direction 30 and the clamping device 30 is the opposite direction for the spreading 32nd

With the housing 28, a contact element 34 is connected, which comprises a first Contact surface 36 having for workpieces. The first contact surface 36 of the contact element 34, the first bearing surface 22 of the contact element 20 to, so that clamped between the contact surfaces 22, 36, one or more workpieces are. The first contact surface 36 is in particular substantially planar and extends over both sides 24a, 24b of the slide rail 12 addition. The first contact surface 36 is in their shape in essentially the same design as the first bearing surface 22 of the contact element 20th

The abutment element 34 further has a second contact surface 38 which the first contact surface 36 is opposite. This second bearing surface 38 is in particular substantially formed flat. About an application of the second Contact surface 26 of the contact element 20 against a workpiece and applying the second bearing surface 38 of the contact element 34 can be a workpiece with them Displacement of the slide 12 in the spreading direction 32 a spreading on the respective workpieces exercise.

The second contact element 34 may be integrally connected to the housing 28 be. For example, the housing 28 with integrated contact element 34 from a plastic material. It is also possible in principle that the abutting member 34 is a member separate from the housing 28 is part of that is fixed in the manufacture of the housing 28th

About the sliding rail 12, the contact element 20 is relative to the contact element 34 (and thus to the housing 28) slidably, wherein during the displacement of the slide in the clamping direction 30, the conditioning element 20 on the contact element 34 (on the housing 28) is moved and upon displacement of the slide in the spreading direction 32, the conditioning element 20 of the contact element 34 is moved (the housing 28) away.

To move the slide bearing 12, the housing 28 in alignment aligned bearings 40, 42 and 44. This bearings 40, 42, 44 goes through the slide rail 12 and is slidably guided. The Bearing points 40, 42, 44 have such the dimensions of the slide rail 12 adapted to dimensions that the slide rail 12 essentially without play is held on the housing 28 and thereby slidably on the housing 28 is performed.

The bearing point 40 is, for example, by a recess in the abutment element 34 formed. The bearing point 44 is one formed by a recess in Against grip element 46 is formed. The bearings 40, 44 are located on this or near opposite frontal ends of the housing 28. The Bearing point 42 is between the bearings 40 and 44 in the housing 28 formed to provide additional support for the rail 12th

In the housing 28, a shift mechanism and locking mechanism is for the shift operation of the slide 12 is received. The housing 28 has to a dish-like portion 48 on which the corresponding Parts receives. About a housing cover 50 (Figure 3) this is shell-like closed area 48th

The housing 28 is preferably designed such that the displacement mechanism and locking mechanism for the slide 12 in the housing 28 can be positioned, without additional fastening screws provided to be or that additional components (such as contact pins or waves) must be provided.

In the housing 28, a positioning member 52 is movable and in particular displaceably guided, the displacement direction parallel to the displacement direction the slide 12 is. The positioning member 52 may be in the clamping device 30 and the spreading direction 32 move. The positioning can be formed in one piece or several pieces.

In the embodiment shown the positioning element 52 is seated on the Slide rail 12 and is displaceably guided on this. The slide rail 12 thus provides a guide track for the positioning element 52 prepared so that No additional track must be provided in the housing 28th

The positioning member 52 has two excellent positions, namely a first position 54 in which the positioning member 52 at the furthest in the clamping direction 30 is shifted. This first position 54 in Figure 1 indicated by dashed lines. In this first position 54 is the Positioning member 52 on or in the vicinity of the bearing point 42nd

In a second position 56, which shown in Figure 1 in solid lines is, the positioning member 52 is in the housing 28 in the farthest Spreading direction 32 shifted. In Figure 2, the positioning element 52 is its first position 54 shown. One end 58 of the positioning element 52, which faces the contact element 20, then is closest to the Bearing 40. One the opposite end 58 end 60 of the positioning element 52 has in the second position 56 at the greatest distance to the bearing point 42. Accordingly, in the first position 54, the end 58 of the largest Distance from the bearing point 40 and the end 60 has the smallest Distance away from the bearing point 42nd

The displacement movement of the positioning member 52 on the guide rail 12 can be actuated via a switching device 62, such as the bottom yet is described in detail, via the switching device 62 between a shift the slide 12 in the spreading direction 32 with blocking the displaceability in the opposite direction 30 and a displaceability of the slide rail 12 in the tensioning direction 30 with blocking of the displaceability in the Opposite direction 32 can be switched. Switching is done by positioning the positioning member 52 in the positions 54 and 56th

The switching device 62 comprises in the embodiment shown a rotary switch 64 (Figures 1 and 2) rotatably in the housing 28 is mounted. This rotary switch 64 has an eccentric pin 66 which is immersed in a recess 68 of the positioning member 52 is. The recess 68 is transverse and in particular perpendicular to the longitudinal direction 14 of the slide rail 12 is oriented (and thus transverse to the Directions 30 and 32).

By means of the engagement of the eccentric pin 66 in the recess 68 can be a rotational movement of the rotary switch 64 in a linear displacement movement implement the positioning 52, the particular the positioning member 52 from its first position 54 in the To move the second position 56, and starting from the second Position 56 the positioning element 52 to bring in the first position 54 can. For instance, the pin 66 in the first position 54 (Figure 2) further away from the bearing point 40 than in the second position 56 (Figure 1) of the Positioning 52nd

The rotary switch 64 is in relation to the recess 68 in this case preferably designed so that just the first position 54 and second position 56 excellent Positions are, which can be fixed. For example, to the Rotary switch 64 can be latched if the first position is reached 54 or when the second position is reached 56th It may also be provided that the Rotary switch 64 in relation to the recess 68 is designed such that it can not be rotated further when the first position is reached 54, That is, starting from the first position 54 only a rotational movement is possible in an opposite direction to the positioning member 52 from the first Standing out match 54th Similarly, it is advantageous when it is provided, that the rotary switch 64 is no longer rotated further can be, when starting from the first position to the second position 54 is reached 56th It is then only a counter rotation possible to the positioning 52 from the second position 56 to bring in the first position 54 can.

The positioning member 52 holds a first actuator 70 and a second actuating element 72 via the first actuator 70 is a Shift actuation of the slide enables 12 in the tensioning direction 30 and the second actuating element 72 is a displacement actuator the slide 12 allows the spreading direction 32nd

On the first actuator 70 thereby acts a pair of return springs 74a, 74b, wherein the return springs 74a, 74b on opposite sides arranged the positioning element 52 are (Figure 3). The return springs 74a, 74b are supported here on a portion of the positioning member 52 from which is located at or in the vicinity of the end 60th

Accordingly, a pair of return springs for the second actuating element 72 is provided, wherein in Figure 1 only one return spring 76 of this is visible pair.

The actuators 70, 72 are preferably metal parts, which a respective recess 78 (Figure 3), with which it on the positioning 52 are arranged on the slide rail 12th When movement of the positioning element 52, the actuators 70, 72 are also moved.

The actuators 70, 72 are configured in particular plate-shaped. They are tilted with respect to the slide 12 and can be tilted and the Slide 12 verkantbar. Depending on the tilting direction and application of force is by the actuators 70, 72, the movement of the slide 12 causes a shift direction and in the opposite direction blocked. This will be explained below in more detail.

The first actuator 70 is used to shift actuation of the slide 12 in the tightening direction 30, the second actuating element 72 serves to shift operation of the slide 12 in the spreading direction 32. Whether the actuator 70 acts on the slide 12 or the actuator 72 acts on the slide rail 12 is determined by the position of the positioning element 52 set. In the first position 54 can be the second Actuator 72 so tilt that the appropriate canting 72 the slide 12 taken and movement of the actuator is and is displaced in the spreading direction 32nd In the second position 56 the positioning element 52 can be tilted so the first actuator 70 and tilt and move with the slide that the slide rail 12 taken in the direction of tensioning 30th

The first actuating element 70 is a locking element which the displaceability the slide 12 locks in the clamping direction 30 and the displaceability release in the spreading direction 32, when the positioning member 52 in its first position 54 is. Accordingly, the second actuating element 72 a blocking element, which the displaceability of the slide rail 12 in the Spreading direction 32 locks while the mobility of the tensioning direction 30 releases, when the positioning element 52 is in the second position 56th

Thus, the first actuator 70 may act as a blocking element, is in the housing 28 a contact surface 80 is provided, at which the first Actuator 70 in the first position 54 of the positioning element 52 can be applied, so as to provide for tilting of the actuating element 70, which provide a displaceability of the slide 12 in the tensioning direction 30 locks.

Accordingly, in the housing 28 is a bearing surface 82 for the second actuating element 72 is provided when the second actuating element 72 acts as a blocking element when the positioning element 52 in the second position 56. On this bearing surface 82, the second actuator 72 is applied, to such a tilting provide that the displaceability Slide 12 locks in the spreading direction 32 (and thereby the displacement the slide 12 in the tensioning direction 30 permits).

To actuate the displacement of the slide 12 in the opposite Directions 30, 32 to the actuators 70, 72 in opposite Directions are tilted. Accordingly, the contact surfaces are 80, 82, based on the slide rail 12, to (diagonal) opposite Sites in the housing 28. The contact surfaces 80, 82 can be at the manufacture of the housing 28 forming integrally.

The two actuators 70, 72 are spaced to the positioning 52. At the positioning member 52 sits a spacer 84 between these two actuators 70 and 72 thereof.

The two actuators 70, 72 are based in turn on a first Spring 86 and a second spring 88 against each other, the springs 86, 88 are arranged on opposite sides with respect to the slide rail 12th The spacer 84 has corresponding recesses, through which the Springs 86, passing 88th The springs 86, 88 allow for exertion of force on one of the actuating elements 70, 72 relative to each other tiltability with return action when the application of force is terminated.

To act on the actuating elements 70, 72, a handle lever 90 is provided as Grip element is provided with a handle portion 92nd The grip element 90 is pivotally mounted on the housing 28 is supported. For this purpose, the handle member 90 a stub shaft 94, which in a particular integrally to the Housing cover 50 formed wave Stumme intake 96 is located so that a Shaft stub shaft Stumme taper-bearing is formed 98th Through this Storage has no shaft are provided, which through the housing 28 passes. The bearing 98 is based on a direction of a Housing interior to the outside (transverse to the slide rail 12) above the arranged positioning 52nd

The grip member 90 is so formed that it depending on the position of the positioning element 52 either acts on the first actuating element 70 or to the second actuating element 72 acts to either a displacement in the Tensioning direction 30 (second position 56 of the positioning element 52) ​​or a Shift in the spreading direction 32 (first position 54 of the positioning element 52) pressed. For this purpose, the handle member 90 in an inside the housing 28 disposed portion 100 of the grip element 90, a first Tab 102 which can act on the first actuating element 70 to this tilting in the direction of the bearing point 42 and in the spreading direction to move 32 and thus the displacement of the slide 12 in the tensioning direction 30 to effect; Further, it has a second flap 104 which can act on the second actuating element 72, this in the direction Bearing tilting 40 and to move in de tensioning direction 30 and thus a displacement of the slide 12 in the spreading direction 32 to cause. The second tab 104 is arranged so that it on the actuating element 72 of the side 24b of the rail 12 acts facing while on a side of the second actuating element 72 acts, which the bearing surface 36 away. The first tab 102 is disposed on the handle member 90, that it acts on the first operating member 70 in a region which is the side 24a of the slide 12 facing. Furthermore, the first acts Tab 102 to a range of the first operating member 70, which the facing abutment face 36th This can be achieved by a pivoting movement the handle member 90 in a pivoting direction 106 depending on the position of Positioning 52 a shift in the clamping direction 30 or in the reach the opposite direction 32nd Whether the grip element 90 with its first flap 102 acts on the first actuating element 70 or with its second tab 104 acts on the second actuating element 72, thereby in turn depends on the shift position of the positioning member 52 from. In its second Position 56 affects the grip element 90 on the first actuator 70, while in the first position 54 of the positioning member 52, the second Tab 104 acts on the second actuating element 72nd

It can be provided, that the grip member 90 with the handle part 92, the area 100 and the flaps 102 and 104 and the stub shaft 94 is formed in one piece and, in particular made of a plastic material is.

The handle portion 92 of the handle member 90 is formed so that it is one of User manual, can be grasped with the fingers or palm. In a nichtverschwenkten position is in the embodiment shown the handle portion 92 at an acute angle to the longitudinal direction 14 of the Slide rail 12 is arranged. This angle may, for example, in a Order of 40 °. By a pivoting movement in the Pivoting direction 106 on the slide 12 can be to each over the position of the positioning element 52 selected actuator 70, 72 kraftbeaufschlagen.

The counter-grip element 46, which is in particular integrally with the housing 28 is formed, is precisely a counter-gripping element for the handle portion 92 of the Grip element 90. The angular position of the handle portion 92 is straight so that a user, the helper handle member 46 and the handle portion 92 with a can hold hands, so that the clamping and spreading invention 10 with a manually operable.

There is a release element 108 is also provided, which in the pivoted Housing is arranged 28th For example, it sits pivotally mounted to the handle member 90. It is provided for this purpose a corresponding pivot bearing. about a recess 110 in the housing 28, a user on the release member access and move this.

The release member 108 includes a first plate 112, with which it to the second actuator 72 may act specifically on one side of the actuator 72, which faces the contact surface 36th Furthermore, the release member 108, a second plate 114, with which it first on the Actuator 70 may act, on one side of which the contact surface 36 away. The first tab 112 of the release member 108 is the second tab 104 of the grip element 90 against. Through the release element may be the second operating member 72 from a Verkippungsstellung to solve. The same applies to the first operating member 70 about the Tab 114 allows the release element, a locking position of the respective The actuating element 70 or 72 when this is in a locking position, be repealed, in order to move the slide 12 "by hand" can or a clamping position or spread position with respect to workpieces can solve.

For example, the positioning member 52 in the first position 54 and thus the first actuating element 70 in its locking position, can then be transferred the release member with the second flap 114, the actuator 70 in Direction of the contact surface 36 are tilted to unlock.

If the positioning member 52 in the second position 56, in which the second Actuating element 72 acts as a blocking element, then on the release element with the first tab 112, a movement of the second operating member be effected 72 from the contact surface 36 away to the canting set aside and thus unlock.

The release element 108 is in particular integrally formed. The tabs 112, 114 are related to the slide 12 on opposite Pages. Therefore, by pivotal movement in one direction Solution of the slide can be achieved, regardless of whether the positioning 52 in its first position 54 or in its second position 56 is.

The operation of the clamping and spreading inventive explained with reference to figures 4 to 6:

The rotary switch 64 of the switching device 52 is in such a position, that the positioning element 52 in its second position 56 (Figure 4). The second actuating member 72 is located on the associated contact surface 82 on and is tilted with respect to the slide 12th As a result, the displaceability the slide 12 locked in the spreading direction 32nd The first actuator 70 is in a position such that a displaceability in the Tensioning device 30 is released. Basically, by pressing the guide rail 12 this moved in the clamping direction 30 in the tensioning direction 30 will. In the second position 56 of the positioning member 52, the handle member 90 interact with the first tab 102 on the actuating element 70, to a driving of the slide 12 in the tensioning direction 30 to care.

In Figure 5, a position is shown, in which the handle member 90 relative to a starting position in the direction of the slide 12 is rotated. The first flap 102 of the gripping element 90 acts on the first operating member 70 and tilts and moves this. Thus, the springs 74a, 74b compressed. By the tilt and movement of the actuator 70, the slide 12 is carried along in the tensioning direction 30 (While the actuator 72, the displaceability in the opposite direction 32 blocks). The springs 86, 88 between the two actuators 70, 72 ensure that just a tilting or jamming of the actuating element 70 is possible to take the rail 12th

When the handle member 90 is released, the restoring force the springs 74a, 74b, that the handle member 90 returns to its initial position. The first actuator 70 then returns to its in Figure 4 shown starting position, but the slide 12 to a corresponding piece in the clamping direction 30 is shifted.

6 shows the effect of the release member 108 is shown. When this starting pivoted from the situation according to Figure 4, in the pivoting direction 116 is then acts on this actuating member 72 lifts and at least partially its tilt to the opposite rail 12th Thereby, the locking action of the actuating element 72 (which in the second position 56 of the positioning member 52, a locking element is lifted) and the slide can forward or backward (in the direction of tensioning 30 or the spreading direction 32) are moved.

By switching 62 with the rotary switch 64, the positioning member 52 starting from the second position 56 to the first position 54 be moved and in this position 54, for example by latching be fixed. The ratios described in relation to the Figures 4 to 6 Case revolve around so far that now the first actuator 70 acts as a blocking element and the gripping element 90 on the second actuating element 72 is possible to act on the shift actuator. About the release element 108 can be the blocking action of the first actuator 70 cancel. The operation is basically the same as above with reference to second position 56 described.

The clamping and spreading 10 invention can be easily Making way. The number of required parts can be kept low. The Displacement and locking mechanism can be mounted in a simple manner. By the positioning member 52, which is formed in particular as a spring cage is, can be between a spreading process or a clamping operation switch by correspondingly positioning the 52 first in the Position 54 or positioned at the second position 56 is. By shifting on the slide 12 can be easily between these Positions 54 and 56 switch.

With a single grip element 90 can be (depending on the position of the positioning element perform 52) either an expansion process or a clamping operation. A single grip element 90 with a single swing actuation direction can be the guide rail 12 either in the clamping direction 30 or move in the expanding direction 32nd

The arrangement of the handle member 90 with respect to the slide rail is in principle selectable, so that an optimized ergonomic design is possible. In particular, a counter-gripping element can be (the counter-gripping element 46) align along the slide 12th This, in turn, it is possible that Slide 12 in the counter-gripping element 46 for the sliding displaceability to store.