Concrete core drill

The invention relates to a concrete and rock drilling machine according to the preamble of patent claim 1.

In the previously known drills of this type (see, for example, DE-PS 7 37 761) of the drilling tool and the drive motor carrying carriage of the guide column is removable only in that it is withdrawn in the longitudinal direction of the guide column on one end. Since in this case the supporting structure of the machine had to be at least partially dismantled, the removal of the carriage was cumbersome and time consuming.

A sufficiently strong and rigid drill of the type in question here necessarily has a relatively large weight In addition still comes the considerable weight of the carriage and the drilling tool. The heavier the overall arrangement, the more difficult it is to handle the machine. If a hole in the vertical surface of a wall or on an area overhead or on a ceiling ouer

If drilling is to be performed on other hard-to-reach places, it is usually necessary to remove the carriage and drive from the machine base plate so that the operator can fasten them to the relevant area. Once the attachment has been made, the carriage must be put together with the attached drill drive in the previously known versions of machines of the type in question over the end of the guide column and the anchorage to the guide column attached before the

Drilling process can begin.

If such a machine of known design is to be used high on a wall, the person securing the carriage to the guide post must be far back from the wall (and at a relatively great distance from a ladder or scaffold on which it stands). work and slide the carriage onto the guide column with the drill motor. This requires considerable physical effort and can easily lead to accidents. These difficulties are particularly acute when there is little room and the operator must work overhead.

In addition, often the carriages must be exchanged for each other instead of exchanging one drive for another because often each carriage is designed to hold a particular drive Each time such an exchange becomes necessary, therefore, in the known machines, the anchors, etc. of the Guide post columns are released before the carriage can be removed in the axial direction of the column and replaced by pushing another.

The invention has for its object to provide a lighter and safer to use portable concrete and rock drilling machine of the type mentioned, the carriage can be solved without considerable effort from the guide column and removed in the lateral direction of this.

This object is achieved by the characterized in the patent claim 1 training.

This ensures that the removal and reinstatement of the carriage without changing the position of the guide column and without removing other parts of the machine is possible.

Possibilities for advantageous further embodiment of such a drill are specified in claims 2 to 7.

In the following the invention with reference to the drawings, for example, explained in more detail. It shows

F i g. 1 is a side view of a concrete and rock drilling machine according to the invention,

F i g. FIG. 2 is a section along line 2-2 of FIG. 1. FIG.

Fig. 3 is a section taken along line 3-3 of Fig. 1; 1,

Fig.4 is an illustration along the line 4-4 of Fig. 1, Fi g. Figure 5 is a partial view, partly in section, of one

another machine according to the invention,

6 is again a partial view, partly in section, of another embodiment of a machine according to the invention;

A preferred embodiment of a drilling machine according to the invention, as indicated at 10 in Fig. 1, has a rigid base plate 11 which stands or is fixed on the surface 12 of a body to be pierced. 2, the base plate 11 has a substantially rectangular plan. At each of its four corners is located on its underside a compensating body 13 in the region of a plate passing through the threaded hole 14 into which a straightening bolt 15 is screwed. The lower surfaces of Ausgleichsköprer lie in a common plane. So if the base plate of the machine 10 rests on a perfectly flat surface into which a hole is to be drilled, all compensating bodies touch the surface. But if the surface is uneven, the straightening bolts 15 can serve to bring the base plate at four points in stable contact with the surface of the body to be pierced.

In order to facilitate the attachment of the base plate on the surface of the body to be pierced, in particular, if it is a vertical or overhead surface, there is a slot 16 as shown in Figure 2 in the base plate. By this two bolts (not shown) threaded base or dowels can be introduced, which are mounted in a conventional manner in the surface of the body to be drilled.

Like F i g. 2 further shows 11 recesses 17 are provided at the rear corners of the base plate, which serve to receive one of two wheels 18. Each of these wheels is mounted on a stub axle 19 which passes through a block 20 welded to the top of the base plate adjacent the recess so that the wheels can rotate about a common axis of the projection of the base plate 11. Like F i g. 1 shows, the wheels are arranged so that they lie completely above the plane defined by the lower surface of the balancing body 13 and project beyond the base plate to the rear. As a result, the machine 10 can be moved from one location to another with the aid of the wheels 18, but can be fixed to the surface of the body to be drilled at the location where a hole is to be drilled, without interference from the wheels

As Figure 2 shows a V-shaped recess 22 is provided at the front edge of the base plate. A guide column inserting block 23 is mounted near the center of this recess on top of the base plate. It defines a vertical slot 24 open to the recess 22. Between the base plate and the block 23, supporting reinforcements 25 are welded to assure in that the block 23 is immovably fixed on the base plate of the machine 10

The tubular guide column 27, preferably of rectangular or square cross-section, is fitted snugly in the slot 24 and fixed at its lower end in the block 23 by bolts 28. The column 27 extends from the base plate 11 preferably perpendicular / u of the common plane defined by the balancing body 13 upwards. In the upper end of the column there is mounted an armature having a short pin 29 concentric with the axis of the column (Fig. 4). The diameter of the pin is smaller. Is the smallest transverse dimension of the column, so that the upper end of the column forms an upwardly open shoulder 30 at the lower end of the pin above the pin extends a stepped, coaxial threaded extension 31 addition.

On the pin 29, a support cross member 33 is fitted with an opening 34 whose thickness corresponds to the axial length of the pin 29 which rests on a shoulder 30 and which is od by a nut 35. The like. Firmly pressed. The support bar extends horizontally from the top of the column, as in FIG. 1 and 2 to see, to the rear. Preferably, as F i g. 4 shows front and side surfaces of the Stützraver se a continuation of front and side surfaces of the column upwards. Two support struts 36 for the column are mounted between the extension of the slaving traverse to the rear and the rear part of the base plate 11. Preferably, the support struts are welded to the support crossbeam and the base plate, but the connection of the support struts to the base plate can also take place in sockets 37, in which the lower ends of the support struts are secured by pins 38. Preferably, the support struts are formed by metal pipes. Alternatively, as shown in Fig. 5, the lower ends of the support struts may be bent so as to form vertical end pieces 78 which engage with slight play in vertical bores 79 in the base plate in the vicinity of the recesses 17. During operation of the drilling machine, the lower ends of the support struts are supported by the reaction forces of the drilling tool against the rear part of the inner surfaces of the holes due to the load on the column.

Preferably, the base plate 11, the column 27, the support beam and the support rods are made on a material of as low a weight as the necessary rigidity and strength requirements of machines of the type in question allow. Furthermore, the support struts preferably diverge from the support crosspiece 33 towards the base plate so as to form as stable a framework as possible for the column.

The column 27 is accordingly part of a

rigid and light guide scaffold door a carriage 40 carrying the motor and the tool, which is displaceable along the column Like the F i g. 1 and 3, this includes a slider 41 and a similar door-open flap 42. The slider

so has a relatively large length parallel to the column and is adjacent to the front and side surfaces. At its rear side, it has a rectangular, slot-like recess 43 in which the column is arranged on the vertical inner surfaces of the recess 43 is ever a replaceable, the wear underlying sliding plate 44 attached which is in contact with the adjacent surface of the column Preferably, the sliding plates of graphite bronze or the like. The sliding plates are wjicher than the material of the column, so that when moving up and down of the traverse during operation of the machine 10, the sliding plates 44 wear more easily than the outer surfaces of the column.

The vertical dimension of the flap 42 corresponds to that of the slider. The flap is in the

M neighborhood of a side surface of the column, such as F i g. 3 shows hinged to the slider. The hinged attachment of the flap to the slider is effected by a hinge pin 45 which is parallel to the longitudinal extension.

tion of the recess 43 is mounted in the slider. Two eyeleted projections 46 (Fig. 1) protrude into corresponding recesses 47 in the slider at intervals along the hinge pin which they serve to support within these recesses. The flap is held in the closed position on the slider, with which it engages around the column 27, by two locking bolts 48, which knurled nuts 49 od. Like. Wear. Each pin 48 is disposed in a slot 50 which passes through the slider and the flap on the opposite side of the pivot pin 45, perpendicular to this, passes through, leather pin 48 is pivotally mounted on the slider with a pin 51 having an eyelet 52 am one end of the bolt interspersed. The opposite end of the bolt is provided with thread 53 / ur receiving a nut 49.

The clanP Implies / wri. Hf-m Vprsrhlpitt iiniprljpgende sliding plates 55 made of the same material as the sliding plates 44. They come with the rear surface of the column in contact when the flap is closed, as it F i g. 3 shows. The slide plates 44 and 55 complement each other such that the carriage 40 includes the column 27 with relatively tight track felt.

Along the largest part of the column 27 extends a rack 56, which is fastened on its rear side by bolts 57. In the closed position of the flap 42 on the slider 41, the rack between the adjacent Fiichen the sliding plates 55 and cooperates with a drive pinion 58 which is fixed for example by a wedge 59 on a shaft 61. which is rotatably mounted in bearing bushes in the flap. The two ends of the pinion shaft extend beyond the flap and can be designed as a square 63. A key od. Like. Can attack it to rotate the pinion shaft and thus to move the carriage 40 on the column 27 upwards or downwards.

During operation of the machine 10 is a drilling motor, in particular an air-powered motor 65 with a chuck 66, in which a drill or core drill is used as a drilling tool. attached to the carriage 40 so that the chuck rotates about its axis 67 parallel to the axis of the column 27. The motor 65 may be mounted directly on the slider of the carriage 40, but preferably its attachment takes place with the interposition of a motor base 70th which is supported on the front surface of the slider and having at both ends flange portions 72 adjacent to the respective corresponding surfaces of the Gleitstucks. The motor base is releasably secured to the slider, for example, by machine screws 73, which seat in the flanges 72 and engage in threaded holes in the slider. The motor base and the motor are immovably connected to each other, for example, by a horizontal portion 74 which engages in a Quemut 75 in the motor base and bolts (not shown), the heads of which are embedded in the front surface of the slider contacting surface of the base.

The design of the motor base depends practically on the motor used in the machine 10, so its structural details can be left to the competent expert, once the type of motor to be used is known. Preferably, however, each provided for use on the machine engine is provided with its own motor base. So if the motors are to be replaced on the drill, it just needs the motor base of the slider solved un together with your engine as a unit abgenomme and against another unit, consisting of a motor and a motor base, exchanged to werder the motor 65 is Compressed air via a Schlauchle device 75 is supplied, and it is connected to a pneumatic control device 76, which ben 36 is attached to the Stützstre. The control means may include a pressure gauge and all desired control valves for controlling the operation of the engine 65. The compressed air is supplied to the controller 76 via the hose 77 from a compressor od. Dg (not shown). However, the invention is not limited to the use of pneumatic motors, but may also be used on electric motors

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However, pneumatic engines are preferred in many cases because such engines are generally lighter in weight than electric motors of equivalent power.

The use of the machine IO in conjunction with a horizontal or substantially horizontal processing surface is readily apparent from the drawings. But especially when the machine is to be used in a vertical or over Kop surface, such as on a ceiling or ridges, their advantages vis-a-vis the hitherto known machines are conspicuous in appearance. Let there be a reinforced hole in the concrete wall of an existing structure are drilled at some distance above the ground, then the carriage 40 was in preparation for attaching the machine 10 to the wall first separated from the column 2. The supporting and guiding frame for the carriage is fastened to the wall at such a location with bolts that the axis of rotation of the engine of the machine to be used runs coaxially with the desired borehole axis. The attachment of the Grundplat te 11 and the associated structure to the Wan> is a relatively light work and can be relatively fast perform comparatively. Once the base plate a has been mounted and secured to the wall, the operator only needs to attach the carriage 40 (to which the motor 65 has been attached with a suitable support base) to the guide post. The carriage is attached to the column by first opening the flap 42 with respect to the dice 4 and bringing the sliding plates 44 into contact with the front and side faces of the column. Then, the flap around the pivot pin 45 becomes in the closed position pivoted relative to the slider, w that the sliding plates 55 contact the rear surface of the column on both sides of the rack 56. The flap "is then fastened in its closing position on the slider of the carriage by means of the lock 48, 49 consisting of nut and pivot bolt. Preferably, this connection of the carriage 40 with the column 27 is carried out at a time in which the drilling tool" is still not in the chuck 66 Accordingly, the initial connection de; Sliding with the column at a position along the column which is close to the base plate 11 This means that the operator, who may be standing on a ladder or scaffolding high above the floor, does not need to work far away from the wall around the sled about the free one

a guide post, as was the case with earlier drills. Also, the operator does not need to connect any particular supports to the free end of the column after the carriage has been slipped onto the column. Staii of the carriage is attached to the machine 10 in a comfortable and secure manner, and this can be done at a position along the column, which is close to the wall and in the footprint of the operator on his ladder or scaffold.

After the carriage is connected to the guide post, it can be extended away from the wall and a suitable drilling tool inserted into the chuck 66. The machine can then be operated by rotation of the shaft 61 to the carriage

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A typical core drilling tool 80 is shown in FIG. The tool has an end plate 81 with an axial shaft 82 which is insertable into the chuck 66. The end plate is threaded (not shown) for receiving the internally threaded upper portion of a core tube 83 or an extension tube 84 of suitable diameter. The lower edge of the core tube carries on its circumference cutting teeth 85 in the manner of a milling cutter. If the hole to be drilled is deeper than the length of the tube 83, an appropriate number of extension tubes are inserted between the face plate 81 and the core tube to form a core drilling tool of the required length.

It is by no means unusual that core drilling tools are used to drill holes to a depth of 6 meters or more. The drill motor is advanced along the guide post supporting it against the surface to be machined, as described above, with the motor initially connected to a drilling tool. whose length is less than the feed distance of the motor on the guide part. Now if the hole has been drilled so deep. that the face plate of the drilling tool is flush with the working surface, the drive of the motor is interrupted, the tool released from the end plate, and one or more extension sleeves are inserted between the tool face plate and the drill sleeve to increase the effective length of the drilling tool, after which the core drilling can be resumed; this method is repeatable, but in some cases it is necessary to assemble a drilling tool of a length sufficient to make a hole of the desired depth. Each time the tool is released to attach extension tubes, the core tube and associated extension tubes are retained in the wellbore with the end of the extension tubing exposed above the processing surface

As already mentioned, the earlier core drilling machines were constructed so that the snowmobiles could only be removed from the guide column beyond the end of the column, and then only when the columns had been removed from the column. When the supports were removed from the guide columns of the previous machines, the rigid support of the drilling motor was lost, with the result that a long core bit easily jammed in the drilled hole, thereby making the motor and the one connected to it very hard Remove core drilling tool from the borehole.

The core drill 10, however, is constructed so that a long Kembohrwerkzeug can be easily removed from a drilled hole, without having to resort to the above-described, cumbersome procedure, which was necessary in the previously known machines. As already mentioned, the front part of the support cross member 33 and the nut 35 lie within the extensions of the front and side walls of the guide column 27, or they limit this. To retrieve a long core drilling tool from a drilled hole, the flap of the carriage 40 is opened so that the carriage of. the guide groove can be removed laterally without the support struts 36 must be released from the column. In the machine according to the invention, the support struts hold the column in a position relative to the drilled hole such that the carriage, the drilling motor and the drilling tool can be pulled away as a unit from the drilled hole, and during this pulling away the sliding plates 44 act with the Column together to secure the movement of the tool along the axis of the drilled hole.

Another embodiment of the drilling machine according to the invention, as shown in FIG. 6 and designated 90, can be advantageously used when the hole to be drilled is particularly deep. The machine 90 is similar to the machine 10 of Fig. 1, but its guide post 27 'carries the rack 91 at its front rather than at its rear. The machine 90 has a carriage 92 which is similar to the carriage 40, but in which a pinion drive (not shown) is mounted in a slider 93 (rather than in a flap 94) on a rotatable pin 95. Further, compared to the carriage 40 according to F i g. 3, the components of the carriage 92, which correspond to the elements with the reference numerals 44 and 45, a reversed position. Incidentally, the carriage 92 corresponds to the embodiment as shown in Fig. 3.

The core drilling machine 90 includes a support beam 97 similar to the support beam 36 of the previously described embodiment, but is formed so that its front surface forms an extension 98 of the rack 91.

An extension piece 100 is also provided for the guide column 27 '. This extension piece is similar to the column 27 'and includes an end piece 101 with a threaded bore 102 into which a threaded shank 3V, which is fastened to the end piece 103 of the column 27', can be engaged

After a deep hole is made by core drilling by means of the machine 9C, the extension piece 100 is connected to the column 27 'and the carriage moved (by rotation of the shaft 95) along the extended column after the flap 9 <is opened around the support cross 97 to give that the drilling tool can be pulled out of the hole. As the struts 36 remain connected to the column, such movement of the carriage K along a line parallel to the axis of the wellbore traverses the line, and extraction of the tool has been significantly easier and faster than previously possible with core drilling machines.

For this 3 sheets of drawings

809 640/»