EP0559188B1 - Device for manipulating heavy workpieces - Google Patents

Abstract

In a device for manipulating heavy workpieces, in particular for laying kerbstones in road building, a working device (20, 20a) is to hang on a traction cable (16) which is guided via at least one deflection roller (14, 15) on a boom (12). <IMAGE>

Description

The invention relates to a device for picking up, moving and lowering curbs or the like. Heavy workpieces in road construction, with a work tool on a traction rope, which is guided over at least one deflection roller on a gallows, the work tool having a support rod on which two Clamping devices are arranged spaced apart from one another, the one clamping device having an angle lever which is connected to the support rod via a swivel joint and which can be rotated about the swivel joint via a steering fork.

A forklift is known from LU-A 81 658, on the fork of which there are plates to be laid. These plates are gripped by a crane-like device and placed at the desired location. This also applies to other paving stones, which are removed from a stack by appropriate suction cups.

Another laying device for panels is known from DE-A 2 426 713, the panels being lifted by a lowerable collet are added. This collet consists of two hinged levers, with a tension spring attached below a swivel axis, which tries to move the jaws against each other.

FR-A 2 593 201 also shows a device for transporting concrete elements or curbs that are carried on a pallet. The curbs are gripped and put down by automatic pliers.

A device of the above. Art is shown in EP-A 0 035 159. It is a clamp for plate-shaped concrete elements, the clamp being equipped with a toggle lever as a pressure element and two-armed levers for clasping the stones.

The present invention has for its object to make laying curbs as independent of human labor as possible and performed by only one operator.

To solve this problem, the angle lever is articulated approximately in the middle of a lever, at the free end of which a steering fork is fixed and the other end of which is articulated with the support rod, the drive for the pull cable being controllable from the steering fork.

The gallows should preferably sit on a loading area that is part of a self-propelled unit. This creates a device which can be operated independently of a carrier vehicle, but the present inventive concept also includes that the boom is mounted, for example, on the loading surface of a carrier vehicle. However, preference is given to the self-propelled unit, since then for all work related only one person is required to lay curbs, which leads to considerable savings.

The gallows should preferably be connected to the loading area via a joint. This means that in order to transport the self-propelled unit, the gallows can be turned over and this self-propelled unit can be attached to a transport vehicle, for example. In this way, cheap transportation to the next construction site takes place.

Furthermore, a plurality of work and drive devices should be installed on the loading area. This includes the corresponding drive units for the self-propelled unit itself, as well as the corresponding drive units for hauling in the pull rope. This includes, for example, an electric motor that drives a corresponding rope drum. Furthermore, containers for the needles or other containers for corresponding tools, workpieces, equipment or the like should also be provided on the loading surface.

To manipulate the work equipment, it is advisable for the boom to have a boom that can be used to swing the work equipment beyond the edge of the loading area. In order to then absorb the weight of the work equipment on the other side, on the other hand, a weight should again be provided on the boom.

Central work equipment should be a facility for picking up, moving and lowering curbs. For the sake of simplicity, this implement consists of a support rod, which is definitely longer than a curb. This support rod has a clamping device on both ends, which are spaced apart from one another accordingly. One clamping device, with which the user also manipulates the curbs, has an angle lever which is articulated in the knee to the support rod. Here, one leg forms downward, which strikes the other leg against an end face of the curb when pulled. The other leg is pulled in that this leg of the angle lever is articulated approximately in the middle of a further lever, one end of which is free, but the other end of which is articulated to the support rod. If the free end is now pulled, there is a transfer to the angle lever, which causes the free leg of the angle lever to strike the end face of the curb.

At the free end of the lever just mentioned, a steering fork should preferably be arranged, which, as above described, the manipulation of the equipment and the curb is used. For this purpose, this steering fork has two handles, with a switch box with corresponding buttons on one handle, via which the pull rope can be actuated. On the other handle, an operating lever is fixed, which is connected to a Baudenzug, the task of which will be described later.

Opposite this clamping device, the second clamping device is located at the other end of the support rod, this clamping device being arranged displaceably on the support rod. Here, this clamping device encompasses the support rod with a sleeve, a fixing being effected by a cross bolt which is guided through the sleeve and in the interior thereof through corresponding bores in the support rod. In a preferred exemplary embodiment, this cross bolt is to be connected to the actuating lever via the above-mentioned cable pull. If the operating lever is moved, the cross bolt slides out of the holes in the support rod so that the sleeve on the support rod is released. If at the same time the clamping device strikes the other end face of the curb, this clamping device can be moved by a pull on the support rod.

In a preferred embodiment, however, this clamping device is under a train in the direction of the steering fork. This is effected by means of a tension spring which is attached on one side to the clamping device and on the other side to a holder on the support rod. A further bolt, which interacts with the above-mentioned bores in the support rod, is sufficient for releasably fixing this holder. The fixing of the bracket takes place with regard to a predetermined dimension of the curbs, so that this bracket only at significant differences in the length of the curbs must be offset.

With this device according to the invention, curbs can be laid in the simplest and most energy-saving manner without the user having to travel unnecessary distances.

• Fig. 1 eine Frontansicht einer erfindungsgemäßen Vorrichtung zum Verlegen von Randsteinen;
• Fig. 2 eine Seitenansicht der Vorrichtung gem. Fig.1;
• Fig. 3 eine Seitenansicht einer erfindungsgemäßen Arbeitsgerätschaft zur Verwendung in einer Vorrichtung zum Verlegen von Randsteinen gemäß 1;
• Fig. 4 eine Draufsicht auf einen Teil der Vorrichtung gemäß Fig. 3.

Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing; this shows in

• Figure 1 is a front view of an inventive device for laying curbs.
• Fig. 2 is a side view of the device acc. Fig.1;
• 3 shows a side view of an implement according to the invention for use in a device for laying curb stones according to FIG. 1;
• FIG. 4 shows a top view of part of the device according to FIG. 3.

A device R according to the invention for laying curbs 1 indicated in FIG. 2 has a loading surface 2 which has axles 3 and 4 on both ends which connect the wheels 5. The front axle 4 is via a drawbar 6 designed steerable, so that the direction of the device R can be determined. As can be seen from FIG. 1, the drawbar 6 is offset on the edges, so that a user of the device can run next to the device R and operate the device R, as described later, and simultaneously control the device R.

To control the device R according to the invention, there is a control panel 7 on the drawbar 6 with corresponding buttons 8 for forward and reverse travel. The control panel 7 is connected via a line 9 to a drive unit 10 which drives the rear axle 3 via chains 11.

Furthermore, a gallows 12 is seated on the loading surface 2 and has a boom 13. On this boom 13 there are two deflection rollers 14 and 15, over which a pull cable 16 is guided. At one end there is a hook 17 on the traction cable 16 which holds a support roller 18. In the present exemplary embodiment, a work tool 20 is arranged on the support roller 18, which will be described later.

In order to compensate for the weight of the working equipment 20 and, for example, curb stones 1 to be installed, a weight 21 is located on the boom 13 on the other hand of a boom tree 19. This weight 21 is preferably arranged to be displaceable.

The pull rope 16 runs on a drum 22, this drum 22 being connected to a drive 23. The drum 22 can be rotated via the drive 23. A unit 24 is provided to supply the drive 23 with the appropriate energy.

It should also be mentioned that the boom boom 19 is connected to the loading area 2 via a joint 25, so that the boom boom 19 together with the boom 13, for example a transport can be transferred from one construction site to another. For this purpose, the boom 13 is connected to the boom boom 19 via a joint, not shown.

An implement 20 for laying curbs is shown in FIG. 3 and partly in FIG. 4. This implement 20 hangs on the support roller 18, a compensating cable 30 partially wrapping around the support roller 18. This compensating cable 30 is fixed on both sides to a clamping device 31 or 32, which are connected to a support rod 33. The clamping device 31 is slidably arranged on the support rod 33, which is why it is seated on the support rod 33 with a sleeve 34. The clamping device 31 is fixed in a desired working position by means of a cross bolt 35 which can be inserted through the sleeve 34 and differently arranged bores 36 in the support rod 33. To release this cross bolt 35 from the bores 36, it is coupled to an actuating lever 38 on a steering fork 39 by means of a cable 37. When the actuating lever 38 is actuated, the transverse bolt 35 is pulled out of the bores 36, so that the clamping device 31 can move on the support rod 33. This displacement preferably takes place automatically in one direction, namely under the tension of a tension spring 40 which is fixed on the one hand to the clamping device 31 and on the other hand connects it to a sleeve-shaped holder 41. The bracket 41 is also slidably arranged on the support rod 33, wherein the holes 36 can also serve to fix the bracket 41. In this case, the bores 36 are traversed by an optionally spring-loaded bolt 42. By moving the holder 41 on the support rod 33, a basic dimension of a curb can be taken into account.

The other clamping device 32 has an angle lever 43 which forms a swivel joint 44 with the support rod 33 at its end. Rotation of the angle lever 43 about the swivel joint 44 is effected by means of a lever 50 which is fastened at one end to a clamp 46 via a joint connection 45, while a further articulated connection by means of a clamp is located approximately in the middle and before a connecting eye 47 for the compensating cable 30 48 with one leg 49 of the angle lever 43. At the other end of the articulated connection 45, the steering fork 39 is fixed on the lever 50.

In Fig. 4 it can be seen that the steering fork 39 has two handles 51 and 52, one handle 52 of the actuating lever 38 for the Baudenzug 37 is fixed. On the other handle 51 there is a switch box 53 with corresponding buttons 54 for actuating the drive 23 for lowering and lifting the support roller 18 and thus the implement 20. The connection between the switch box 53 and the drive 23 takes place via a corresponding line 55.

The operation of the device according to the invention is as follows:
To raise, move and lower a curb 1, the implement 20 is moved with the aid of the steering fork 39 to such a curb 1 and lowered by pressing the corresponding button 54. On the one hand, the clamping device 32 strikes a stop cushion 55 on an end face of the curb 1. If the clamping device 31 is located too far from the other end face of the curb, the actuating lever 38 is pressed and the cross bolt 35 is pulled out of the corresponding bore 36 in the support rod 33. The clamping device 31 or a corresponding stop cushion 56 is pulled under the tension of the tension spring 40 to the end face of the curb, which means that it now sits between the clamping device 31 and the clamping device 32.

The fixing of the curb 1 between these two clamping devices 31 and 32 is now brought about by lifting the steering fork 39, which takes place under the corresponding tension of the compensating rope 30 when the pull rope 16 is tightened. No more force has to be used by the worker himself.

The curb now hangs on this implement 20 and can be brought into a desired position and lowered there. All of this happens quickly and without additional effort.

When a new curb is received, the clamping device 31 can be brought into a different position by first striking the end cushion 56 on an end face of the curb and, after loosening the cross bolt 35 on the steering fork 39, pulling it towards the worker. This results in an extension of the tension spring 40. This also removes the clamping device 31 from the clamping device 32. Should a compensation of the distance then become necessary, the cross bolt 35 is again pulled, so that the clamping device 31 automatically pulls under the tension of the tension spring 40 End face of the curb is offset.

Claims (12)

1. Apparatus for picking-up, setting-down and sinking-in edging stones or similar heavy workpieces for road-building purposes, having an operational tool (20) on a tension cable (16) which is guided on a gallows-like structure via at least one guide roller (14, 15), the operational tool (20) comprising a support bar (33), on which two clamping devices (31, 32) are disposed with a spacing therebetween, one clamping device (32) comprising an angle lever (43) which is connected to the support bar (33) via a pivot joint (44) and is rotatable about the pivot joint (44), characterised in that the angle lever (43) is pivotally mounted substantially centrally on a lever (50), at the free end of which a steering fork (39) is attached, and the other end of said lever (50) forms a hinged connection (45) with the support bar (33), the drive (23) for the tension cable (16) being controllable from the steering fork.
2. Apparatus according to claim 1, characterised in that a switch box (53), having knobs (54) for operating the drive (23) for the tension cable (16), is situated on the steering fork (39).
3. Apparatus according to claim 1 or 2, characterised in that an actuating lever (38) for a Bowden cable (37) is situated on the steering fork (39).
4. Apparatus according to one of claims 1 to 3, characterised in that the other clamping device (31) is displaceably disposed on the support bar (33) via a sleeve (34).
5. Apparatus according to claim 4, characterised in that the sleeve (34) is traversed by a transverse pin (35) which also engages in a bore (36) in the transverse bar (33).
6. Apparatus according to claim 5, characterised in that the transverse pin (35) communicates with the Bowden cable (37).
7. Apparatus according to one of claims 4 to 6, characterised in that the sleeve (34) communicates with a holder (41) on the support bar (33) via a tension spring (40).
8. Apparatus according to at least one of claims 1 to 7, characterised in that the gallows-like structure (12) sits on a loading surface (2) which is preferably part of an automatically operating unit.
9. Apparatus according to claim 8, characterised in that the gallows-like structure is connected to the loading surface (2) via a joint (25).
10. Apparatus according to one of claims 8 or 9, characterised in that drive assemblies (10) for the automatically operating unit, assemblies (24) for a drive (23) of a drum (22) for the tension cable (16), and containers for workpieces or the like to be manipulated are disposed on the loading surface (2).
11. Apparatus according to at least one of claims 1 to 10, characterised in that the gallows-like structure (12) comprises a vertical member (19) and an arm (13), on which the guide roller (14, 15) for the tension cable (16) is disposed.
12. Apparatus according to claim 11, characterised in that a weight (21) is situated on the arm (13) at the other end from the guide roller (14, 15).

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