Untitled record

(42) Date of commencement of the patent: 15.10.19B9 (45) Date of issue: 10. 5.1990 (73) Patentee:

LISEC PETER

A-3363 AMSTETTEN-HAUSMENING, LOWER AUSTRIA (AT).

(54) DEVICE FOR PRODUCING SPACER FRAME FOR INSULATING GLASS (57) A device for producing spacer frames (44) by bending hollow profiled strips has two bending heads (12) displaceably arranged along a plate (10), with the aid of which a supplied hollow profiled strip forms a spacer frame (44) can be bent. At the bending heads (12) opposite edge of the plate (10) of the bending device (1) is provided a transport carriage (50), which conveys the hollow profile strips bent into a spacer frame (44) to a transfer device (60), which transfer device (60) lifts the spacer frame (44) transported to it from the plate (10) and converts it into a welding device (5) for welding the free ends (45) of the hollow profile strip bent to a spacer frame (44).

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CQ

AT 390 434

WRaeneaiB

No. 390434

The invention relates to a device for producing spacer frame for insulating glass from a hollow profile strip, with two along an edge of a plate slidably arranged bending heads for bending the hollow profile strip to a spacer frame.

Such a frame bending device is known from DE-PS 32 23 881.

In this known frame bending device, the spacer frame produced in her by hand from downstream equipment parts, eg. B. a device for butt welding the free ends of the bent to a spacer frame hollow profile strip.

The present invention has for its object to further develop the known from DE-PS 32 23 881 frame bending device in the direction that a largely automatically working transfer of the spacer frame produced, for example, to a welding device, as from EP-Al-0 192 921 is known, is possible.

This object is achieved according to the invention by a transfer device is attached to the edge of the plate opposite the bending heads, which is pivotable relative to the plate, to implement spacer frames from the bending device in a device for further transport and / or for further processing, and that the axis, by which the transfer device is pivotable, is arranged between the bending device and the device for further transport and / or for further processing of spacer frame.

With the transfer device provided according to the invention, spacer frames lying on the plate of the bending device can be adjusted into a device connected downstream of the bending device (eg a welding device).

If the device of the bending device connected downstream of the bending device is not arranged exactly opposite one another, but is offset laterally, then an embodiment of the invention proves its worth which is characterized by in that a transport carriage for the spacer frames is provided on the edge of the plate opposite the bending heads, which is arranged on along this plate edge arranged guide rails from a bending heads opposite starting position for Übergabevoirichtung towards

With the help of inventively designed frame bending the excavated from the bending heads and along the inclined plate of the Rahmenbiegevorrichtung downwardly conveyed spacer frame from the transport carriage to Übergabevomchtung moved, detected by the latter and set in a frame bending device downstream device for welding the free ends of the hollow frame profiles bent to spacer frame , A device for welding the hollow profile strip to a self-contained spacer frame is, as mentioned above, known from EP-A1-0 192 921 and has a substantially vertical, slightly inclined rear support wall, against which the spacer frame during the welding process ,

Further features and details of the invention will become apparent from the dependent claims, the advantageous developments of the inventive device to the object, and from the following description of a preferred embodiment. It shows Fig. 1 schematically and in plan view an apparatus for producing a spacer frame for insulating glass with upstream and downstream equipment parts, Fig. 2 in an oblique view, a bending device, Fig. 3 a detail of the device of FIG. 2, Fig. 4 a detail of the conveyor, Fig. 5 another detail of the device of FIG. 2, Fig. 6 a in the plate of the device of FIG. 2 retractable conveyor belt and Fig. 7 in side view a gripper for converting hollow profiled strips from the conveyor into the bending heads.

One in FIG. 1 shown bending device (1) are hollow profiled strips, which are to be bent spacer frame, either from a roll forming device (2), are formed in the sheet metal strips hollow profile strips, or from a magazine (3). When hollow profile strips are fed from a magazine (3), the hollow profile strips are welded together in a welding device (4), which may have the construction known from EP-A1-0 192 921, for example, to endless hollow profile strips.

The spacer frames produced in the bending device (1) are then transported to another welding device (5), in which the free ends of the hollow profile strip bent to form a spacer frame are butt welded together. Also, the welding device (5) may have a construction, as known in principle from EP-A1-0 192 921, wherein the welding device (5) has a support wall which is slightly inclined backwards and at which the spacer frame during the Welding process abut.

Between the welding device (4) and the bending device (1), a cutting device designed, for example, as a circular saw is provided, which cuts off pieces of the supplied hollow profiled strips according to the length required for the respective spacer frame. For this purpose, in addition to the conveying path (7) for hollow profile strips, a length measuring device, for example an incremental encoder, is provided which controls the saw (6).

The incremental encoder is driven by a friction wheel, which is provided opposite a pressure-applied to the hollow profile strip pressure roller. Between the length measuring device (8) and the saw (6) is still a drive roller for conveying the hollow profile strips provided.

The magazine (3) for hollow profile strips can be designed as a paternoster magazine. Hollow profiled strips taken from the paternoster magazine are fed into the conveying path (7) by a vibrating conveyor

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Supplied hollow profile strips.

The bending device (1) comprises a plate (10) which is inclined to the horizontal by about 10 to 30 °. In the region of the upper edge of the plate (10) in the direction of the double arrows (11) slidably two bending heads (12) are provided. In the middle between the two bending heads (12), a clamp (13) is provided which holds in the bending heads (12) inserted hollow profile strips during the bending process.

To support the hollow profile strip before and during the bending process, a textile strip (14) is provided on both sides of each bending head (12) as a flexible cover strip for the gap in which the bending heads (12) move along the plate (10). The cover strips (14) are guided over guide rollers (15), which are provided on the one hand in the region of the clamp (13) and on the other hand in the region of the side edges of the plate (10).

The bending heads (12) have the known from DE-PS 32 23 881 Auswerferbügel and deflectors to allow the ejection process to spacer frame (44) curved hollow profile strips from the bending heads (12).

Parallel to the edge of the plate (10), the Enüang the bending heads (12) are movable, a conveyor (20) for Heranfördem provided by hollow profile strips. This conveyor (20) comprises two sections, of which the right in Fig. 2 section lying an endless conveyor member (21), whereas the left in Fig. 2 section is formed as a slide (22).

The endless conveyor member (21) can be applied from above to a heranzufördemde hollow profile strip Andriickrollen (23). The pressure rollers (23) are mounted on their axes (24) on a common shaft (25) which is parallel to the conveying direction rotatable (double arrow (26)). For this purpose, a link (27) is connected to the shaft (25), which can be pivoted by means of a pressure medium motor (28).

Furthermore, above the plate (10), a gripper (30) is provided, which can detect a lying on the conveyor (20) hollow profile strip. By a pivoting movement (double arrow (31)) of the gripper (30) the HohlprofiUeiste of the conveyor (20) is inserted under rotation about its longitudinal axis in the terminal (13) of the bending device (1). Due to the rotation about its longitudinal axis, the hollow profile strip resting on one of its broad sides (preferably the side forming the outer side of the spacer frame) is twisted so that it rests edgewise in the clamp (13), the clamp (13 ) attacks on its two broadsides.

The gripper (30) comprises a support arm (32), which is angled several times and about a below the conveyor (20) arranged, parallel to this axis (33) is pivotable. For this purpose, not shown in detail pressure fluid motors are provided.

The gripper (30) has two clamping jaws (34), (35), each having two prongs and the bottom or from above against a lying on the conveyor (20) spacers can be applied. For movement of the clamping jaws (34), (35) these are coupled to a drive motor (36). FIG. 7 shows that the clamping jaws (34), (35) of the gripper (30) are provided in its initial position in the region of the conveying path of the conveyor (20). In the position of the gripper (30) assigned to the clamp (13), the prongs of its clamping jaws (34), (35) are arranged on both sides of the jaws of the clamp (13).

Between the conveyor track (20) and the trajectory of the bending heads (12) is still a guide surface (37) is provided, along which the both sides of the gripper (30) extending portions of HohlprofiUeiste when converting the same from the conveyor (20) in the bending heads ( 12) on the cover strips (14).

The conveyor track (20) is still a length measuring device, for example, associated with a deflection roller for the endless conveyor member (21) coupled incremental encoder and between the discharge end of the conveyor member (21) and the gripper (30) a light barrier (not shown).

The pressure rollers (23) can be made somewhat oblique to Fördemchtung the conveyor (20), so that the conveyed on her hollow profile strips (see. FIG. 4) are pulled against a plate side next to the endless conveyor member (21) arranged guide bar (29) while they are conveyed. As a result, the hollow profile strips with respect to the jaws (34) and (35) of the gripper (30) are arranged so that they are detected by these in the region of their front ends and secure insertion into the terminal (13) of the bending device (1) is ensured ,

In the plate (10) of the bending device (1) is provided for the direction of movement (double arrow (11)) of the bending heads (12) vertically aligned slot (40). In this slot (40) an endless, guided around two pulleys chain (41) is provided, whose upper run is located just below the top of the plate (10). Over half of its length, the chain (41) is provided with upwardly facing, plate-shaped projections (42), which protrude at a corresponding position of the chain (21) through the slot (40) in the plate (10) upwards. As shown in FIG. 2 2, the upper horizontal leg of a spacer frame (44) bent in the bending device (1) and ejected out of the bending heads (12) bears against the uppermost projection (42) of the chain (41). The two free ends of the hollow profiled strip, which is bent to form a spacer frame (44), rest against the lugs (42) on both sides. By moving the chain (41), a distance holding frame (44) ejected from the bending heads (12) can be transported to the lower edge of the plate (10) of the bending device (1).

In the region of the lower edge of the plate (10), a transport carriage (50) is provided, which guided along the lower edge on guide rails in the direction of the double arrow (51) to a transfer device

-3Nr. 390 434 (60) and slidably guided back again. For the movements of the transport carriage (50) drive means not shown in detail (eg endless chains or the like) are provided.

On the transport carriage (50) two clamps (52) are provided, with which a spacer frame (44), after which it has been promoted by the chain (41) to the lower edge of the plate (10) on the transport carriage (50) can be fixed. Each of the clamps (52) comprises a hook-shaped clamping jaw (53), which are slidably guided on the transport carriage (50) in pivotal bearings (54) so ​​that they are pivoted on the one hand under the action of Druckmittelzylindem (55) and then for clamping a spacer frame ( 44) on a contact surface (56) of the transport carriage (50) are displaceable. In order to control the movement of the jaws (53) accordingly, the connecting joints between the piston rods of the pressure medium motors (55) and the terminals (53) in slots provided in guide plates (59), wherein the slots (59) made approximately S-shaped are. The jaws (52) are further on the transport carriage (50) to bearing (56), d. H. under the action of a Durckmittelmotors (57) pivotable about the plate (10) axes, so that the free ends (45) of the spacer frame (44) from both sides against a Zentrierlamelle (58) fixed to the transport carriage (50) fixed is, can be pressed.

After a spacer frame (44) has been fixed to the transport carriage (50), this moves to the transfer device (60), wherein the movement of the spacer frame (44) along the plate (10) by a in another slot (61) of the plate ( 10) provided conveyor belt (62) can be supported. The conveyor belt (62) is, as shown in FIG. 6 shows, from a below the plate (10) recessed position (during the bending process) in a over the top of the plate (10) projecting central position liftable. The conveyor belt (62) is preferably made as a transport belt with outwardly facing teeth made of rubber-elastic material.

The transfer device (60) is intended to lift a spacer frame (44) from the plate (10) of the bending device (1) and to transfer it to a welding device (5) arranged next to the bending device (1), in which the free ends (45 ) of the spacer frame (44) are butt welded together.

The transfer device (60) comprises a frame (63) which is pivotable about an axis (64). On the frame (63) there are provided a plate and, starting therefrom, two spars (65) against which the upper, horizontal leg of a spacer frame (44) rests during the transfer of the spacer frame (44).

The lower, horizontal leg of the spacer frame (44) is held by clamps (67) provided on a bar (66) of the transfer device (60) and optionally additionally by additional clamps (68) (68) provided at the outer ends of the bar (66). if the spacer frame is long enough).

The inner clamps (67) on the beam (66) each comprise a clamping plate (69), which are displaceable by a pressure medium motor (70) on an abutment (71) fixed rigidly to the beam (66).

The two outer clamps (68) comprise clamping jaws (72) pivotable parallel to the longitudinal extent of the beam (66). For pivoting the clamping jaws (72) of the terminals (68) pressure medium motors (73) are provided.

The beam (66) is pivotable about an axis (64) aligned parallel to its longitudinal extent and parallel to the lower edge of the plate (10), i. H. in the direction of the plate (10) back and forth. In addition, the beam (66) on the plate (10) can be raised and lowered below this again. For this purpose, at the ends of arms (75) provided pivot bearing (76) (axis (74)) to handlebars (77) attached to a shaft (78) are attached. By pressing of pressure medium motors (79) of the beam (66) relative to the plate (10) can be raised or can be lowered, whereas by pressing the pressure medium motors (80) of the beam (66) with its terminals (67) and (68) about in the plane of the plate (10) can be moved back and forth.

The device just described for producing a spacer frame (44) for insulating glass from a hollow profile strip works as follows:

The frame bending device (1) is supplied via the transport device (20) either from the roll forming device (2) or a hollow profile strip taken from the magazine (3) and endlessly welded together in the welding device (4). The hollow profile strip of the saw (6) is exactly cut to the length required for the production of the respective spacer frame (44). The length measurement takes place via the length measuring device (8), which is designed as an incremental encoder and is provided in front of the saw (6) and after the welding device (4). Between the length measuring device (8) and the saw (6) is still a (not shown in the drawings) drive roller for transporting the hollow profile strip to the conveyor (20) is provided.

The conveyor (20) at the upper edge of the bending device (1) transports the appropriately cut hollow profile strips so far that they are stopped exactly in the middle between the bending heads (12). This causes the joint between the free ends (45) of the hollow profile strip bent to form a spacer frame (44) to lie exactly symmetrically with respect to the bending heads (12) and the transport carriage (50). Hiezu is at the end of the endless conveyor (21) a light barrier provided the front end

-4Nr. 390 434 detects a conveyed hollow profiled strip and the with the endless conveyor (21) connected incremental encoder for length measurement in operation, the drive for the endless conveyor (21) stops taking into account the length of the hollow profile strip when the center of the hollow profile strip between the bending heads (12 ), d. H. to the gripper (30) or the terminals (13) is aligned symmetrically. After the hollow profile strip has been correctly positioned, the pressure rollers (23) are lifted off the endless conveyor (21) by actuating the pressure medium motor (28) and the gripper (30) is actuated and places the hollow profile strip in the clamp (13) between the bending heads (12 ) on. Then the hollow profile strip of the terminal (13) is clamped standing upright.

Before carrying out the bending operation, the chain (41) provided in the slot (40) of the plate (10) is positioned so that the uppermost of the lugs (42) attached to it are approximately as shown in FIG. 2 shown location occupies. Now z. B., as described in DE-PS 32 23 881, lifted from the hollow profile strip a spacer frame (44). After operating the ejector on the two bending heads (12), the spacer frame (44) takes the in Fig. 2 shown position, d. H. its upper, horizontal leg (43) abuts the uppermost projection (42) on the chain (41). The two free, yet to be welded ends (45) of the hollow profile strip are located on the upstanding lugs (42) of the chain (21) on both sides or are located next to the lugs (42). Thereafter, the chain (41) is set in motion and the distance holding frame (44) along the plate (10) down to the transport carriage (50) promoted. The lower horizontal leg of the spacer frame (44) actuates a capacitive proximity switch, not shown, provided in the plate (10) in the region of the carriage (50), whereupon the two clamps (52) are actuated and the spacer frame (44) hold against the clamping surface (56) of the transport carriage (50) fitting. Thereafter, the two terminals (52) by pressing the pressure medium motor (57) approached each other, so that the two free ends (45) of the spacer frame (44) abut the Zentrierlamelle (58). If the stroke of the two clamps (52) is greater than the free distance of the ends (45) from the centering blade (58), the jaws (53) slip on the spacer frame (44).

The transport carriage (50) then moves with the spacer frame (44) held by it to the transfer device (60) at the end of the plate (10).

In order to avoid warping with larger spacer frames (44) during its transport, the conveyor member (62) is raised in the slot (61) in the panel (10) and assists in transporting the spacer frame (44) to the transfer device (60).

Prior to arrival of the transport carriage (50), the beam (66) has been displaced downwards with its clamps (67) and (68) (twisting about the shaft (78)) so that the clamps (67) and (68) are in transit of the spacer frame (44) does not hinder. With the clamps (67) and (68) open, the bar (66) of the transfer device (60) is raised (actuation of the pressure medium motors (79)) and (actuation of the pressure medium motors (80)) to the lower leg, clamped to the carriage (50) of the spacer frame (44) moves. Thereafter, the terminals (67) and, with a sufficiently long spacer frame, the clamps (68) are closed, so that the spacer frame (44) with its lower, horizontal leg is fixed to the transfer device (60). The clamps (52) of the transport carriage (50) are opened, the beam (66) of the transfer device (60) moves back (actuation of the pressure medium motors (80)) and the carriage (50) can be moved to its in Fig. 2 be moved back starting position shown.

Now, the transfer device (60) pivots about its axis (64) and sets the spacer (44) in the welding device (5) connected downstream of the bending device (1). To adjust the spacer frame (44) into the welding device (5), the beam (66) is moved again with the clamps (67) and (68), i. H. when the transfer device (60) is pivoted upward, it is moved downwards by the pressure medium motors (80). The clamps (67), (68) open and the beam (66) moves upward again, whereupon the transfer device (60) returns to its initial position (FIG. 2) is pivoted back.

During this operation of the transfer device (60), the transport carriage (50) was moved back to its ready position shown in FIG. 2 to take over the next now bent spacer frame (44) and to transport it back to the transfer device (60).

After pivoting back the transfer device (60) in the ready position shown in Fig. 2, the beam (66) is lowered again, so that the terminals (67) and (68) under the top of the plate (10) of the bending device (1) are located.

According to an embodiment not shown, the transfer device (60) at the lower edge of the plate (10) of the bending device (1) symmetrical to the gripper (30) for converting the hollow profile strips to be bent to spacer frame (44) of the conveyor (20) in the terminal (13) and the bending heads (12) may be arranged. In this embodiment, no transport carriage (50) is provided and the device for further processing of the spacer frame (44) (z. B. the welding device (5)) is also arranged symmetrically to the gripper (30) and to the terminal (13).

Instead of the provided with lugs (42) endless chain (41) can in the apparatus according to the invention as a funding, which from the bending heads (12) excavated and on the plate (10) resting spacer frame to the lower edge of the plate (10), d , H. to the transport carriage (50) or moved directly to the transfer device (60), a carriage may be provided. This carriage is aligned perpendicular to the conveying direction of the conveyor (20) and parallel to the plane of the plate (10)

-5Nr. 390 434

Guides (eg guide rods) can be moved back and forth. Furthermore, this carriage is equipped with clamps which detect and release the spacer frame (44) as soon as the spacer frame (44) is aligned with respect to the transport carriage (50) or the transfer device (60) and by the clamping devices (52) provided thereon. or (67), (68).