Abstract
A storage and retrieval device is described having a mast (1) movable along a lower travel rail (3) and an upper guide rail (4), having a lift truck (15) movable along the mast (1) on a lift guide (16), having a mast support (2) arranged on the mast side opposite to the lift truck (15), and having a chassis bearing a running gear for support on the travel rail (3). To provide advantageous construction conditions, it is proposed that the mast (1) and the mast support (2) form the chassis, and the running gear has in each case a running gear group (6, 7) arranged on the mast (1) and on the mast support (2), wherein the two running gear groups (6, 7) are supported in a bearing frame (12) provided on the base of the mast (1) and the mast support (2).
Claims
1. A storage and retrieval device comprising: a mast movable along a lower travel rail and an upper guide rail, a lift truck movable along the mast on a lift guide, a mast support arranged on a side of the mast opposite to the lift truck, and the mast and the mast support together forming a chassis bearing a running gear supporting the chassis on the lower travel rail, wherein the running gear has a running gear group arranged on the mast and on the mast support, respectively, and wherein the running gear groups are each supported in a respective bearing frame on the base of the mast and the mast support.
2. The storage and retrieval device according to claim 1, wherein the mast and the mast support are connected to form a triangle formation.
3. The storage and retrieval device according to claim 1, wherein the mast and the mast support are linked to each other in an articulated manner, and spacing between the running gear groups of the mast and the mast support is adjustable.
4. The storage and retrieval device according to claim 1, wherein the lift guide for the lift truck extends below an upper edge of the lower travel rail for the running gear.
5. The storage and retrieval device according to claim 1, wherein the lift truck has a belt drive, wherein the belt drive has an endlessly guided belt that is guided via deflection rollers supported in the bearing frame of the mast base to a drive arranged on the bearing frame of the mast support.
6. The storage and retrieval device according to claim 5, wherein an end of the belt of the belt drive is fastened on a clamping plate connected in a displacement-fixed manner to the lift truck and an opposite end of the belt drive is fastened on a clamping plate adjustable using a tensioning drive in a longitudinal direction of the belt, and two clamping plates arranged adjacent to one another overlap one another in the longitudinal direction.
7. The storage and retrieval device according to claim 1, wherein the running gear comprises a wheel drive arranged on the bearing frame of the mast support and interacting with the travel rail.
8. The storage and retrieval device according to claim 1, wherein the running gear groups arranged on the mast and on the mast support are attached to a continuous drive extending along the lower travel rail.
9. The storage and retrieval device according to claim 1, wherein the mast support has a second lift guide for a lift truck.
10. The storage and retrieval device according to claim 1, wherein a mast-parallel guide mast connected to the mast by tension or pressure struts is provided on another side of the mast facing away from the mast support, and said guide mast is supported via a third running gear group on the lower travel rail and has a lift drive for the lift truck guided between the mast and the guide mast.
Description
BRIEF DESCRIPTION OF THE INVENTION
[0015] The subject matter of the invention is illustrated by way of example in the drawing. In the figures
[0016] FIG. 1 shows a storage and retrieval device according to the invention in a schematic side view,
[0017] FIG. 2 shows this storage and retrieval device in a partially cutaway frontal view of the end face in a larger scale,
[0018] FIG. 3 shows a section along line III-III of FIG. 2 in a smaller scale,
[0019] FIG. 4 shows a section along line IV-IV of FIG. 3 in a larger scale,
[0020] FIG. 5 shows a section along line V-V of FIG. 3 in a larger scale,
[0021] FIG. 6 shows a front view of the end face of the lift truck in the region of the tensioning unit for the belt of the belt drive for the lift truck in a larger scale,
[0022] FIG. 7 shows a section along line VII-VII of FIG. 6,
[0023] FIG. 8 shows a construction variant of a storage and retrieval device according to the invention in a schematic side view,
[0024] FIG. 9 shows an illustration corresponding to FIG. 8 of a further embodiment of a storage and retrieval device according to the invention, and
[0025] FIG. 10 shows an additional construction variant of a storage and retrieval device according to the invention in a schematic side view.
WAYS OF EMBODYING THE INVENTION
[0026] The storage and retrieval device according to FIGS. 1 to 5 has a mast 1 and a mast support 2, which forms a triangular formation stiffened like a framework with the mast 1. The mast 1 with the mast support 2 is movable along a travel rail 3 and is held in the upper end region by a guide rail 4, specifically with the aid of lateral guide rollers 5. The mast 1 and the mast support 2 form a self-supporting chassis, which is supported in a load-dissipating manner via a running gear on the travel rail 3. This running gear forms two running gear groups 6, 7, which are associated with the mast 1, on the one hand, and the mast support 2, on the other hand, and which comprise a weight-dissipating running wheel 8 and guide rollers 9, 10 laterally applied to the web of the travel rail 3. Moreover, securing rollers 11 are provided, which engage below the runway of the travel rail 3 and prevent lifting of the running gear groups 6, 7 off of the travel rail 3. In the illustrated exemplary embodiment, the running gear groups 6, 7 have bearing frames 12 separate from the mast 1 or from the mast support 2, respectively, in which the running wheel 8, the lateral guide rollers 9, 10, and the securing rollers 11 are supported. The bearing frames 12 are essentially formed according to FIGS. 4 and 5 by two side jaws 13 connected to one another, between which the running rollers 8 and the securing rollers 11 are supported. According to FIG. 4, the bearing frame 12 is inserted into the base of the mast 1, which forms a box profile, via spacers 14. The bearing frame 12 of the mast support 2 is fastened on this mast support 2 by welding, for example.
[0027] The lift truck 15 is movable on a lift guide 16 along the mast 1 and can be moved by means of an endless belt drive 17. The arrangement is made in this case such that the belt 18 of the belt drive 17 is guided via deflection rollers 19 supported in the bearing frame 12 of the mast 1 to a drive 20 arranged in the bearing frame 12 of the mast support 2, via which one reflection roller 21 for the toothed belt 18 is driven. Depending on the rotational direction of the drive 20, the lift truck 15 can thus be moved along the lift guide 16 on the mast 1.
[0028] As can be inferred from FIG. 4 in particular, the lift guide 16 for the lift carriage 15 extends downward below the upper edge of the runway of the travel rail 3, wherein the profile of the mast 1 has a recess 22 in the region of the guide rail 3. As a result of this lift guide 16, which protrudes downward beyond the travel rail 3, for the lift truck 15, the lift truck 15 according to FIG. 1 can be lowered down to the travel rail 3. To be able to accommodate the load of the lift truck 15, a guide length defined by the spacing of the guide rollers 23 of the lift truck 15 in the direction of the lift guide 16 is to be maintained. Since the lower guide rollers 23 come to rest with spacing below the load support 24 as a result of the described construction conditions, only a section of the guide length is located above the load support, and therefore the lift truck 15 can also assume a better end position in the region of the upper guide rail 4.
[0029] A tensioning unit 25 is provided for tensioning the belt 18 of the belt drive 17, which, according to FIGS. 6 and 7, has clamping plates 26 and 27 for the two ends 28 and 29 of the belt 18 to be connected to one another. While the clamping plate 26 for the end 28 of the belt 18 is connected in a displacement-fixed manner to the lift truck 15, the clamping plate 27 for the other end 28 of the belt 18 is guided so it is displaceable in the lift truck 15 in the longitudinal direction of the belt 18 and is supported via a tensioning drive 30, which is preferably designed as a spindle drive and is used to set the belt tension. Since the two clamping plates 26, 27 are arranged adjacent to one another and overlap one another in the longitudinal direction of the belt 18, a structural length results for the tensioning unit 15 in the direction of the belt longitudinal axis substantially restricted to the length of the clamping plates 26, 27 extended by the tensioning path, and therefore the lift truck 15, in spite of the deflection of the belt 18 around the deflection rollers 19, can be lowered down to the travel rail 3 or raised into the region of the upper guide rail 4, respectively.
[0030] To drive the chassis formed from the mast 1 and the mast support 2, a wheel gearing is provided, which is designed according to the exemplary embodiment as a friction wheel gearing interacting with the travel rail 3. The lateral guide rollers 10 of the running gear group 7 are laterally pressed as friction rollers against the vertical web of the travel rail 3 and driven via a motor 31.
[0031] The exemplary embodiment according to FIGS. 1 to 7 represents an embodiment variant of a storage and retrieval device according to the invention, wherein as a result of the circumstance that a separate chassis is omitted and the mast 1 and the mast support 2 form a self-supporting chassis, which is supported via two running gear groups 6 and 7 on the travel rail 3, for example, a rigid triangular formation between mast 1 and mast support 2 can be omitted. FIG. 8 shows such an embodiment, in which the mast support 2 is linked via an upper joint 32 on the mast 1. Mast 1 and mast support 2 are each supported per se via the running gear groups 6, 7 on the travel rail 3, wherein a separate traction drive 33 is associated with each running gear group 6, 7. These traction drives 33 are illustrated as friction wheel drives having lateral guide rollers 10 and are each controlled per se such that the spacing of the running gear groups 6 and 7 from one another can be set and regulated according to the respective operating conditions. It is therefore possible to change the base of the storage and retrieval device in accordance with the respective requirements.
[0032] Moreover, it is indicated in FIG. 8 that not only the mast 1, but rather also the mast support 2, can bear lift guides 16 for a lift truck 15. In this case, controlling each of the two lift trucks 15 as such via separate drives 34 recommends itself, which drives are preferably connected to belt drive 35 for the positioning movement of the lift trucks 15.
[0033] The base of a storage and retrieval device according to the invention defined by the spacing of the two running gear groups 6 and 7 can also be established according to FIG. 9 by a continuous drive 36 extending along the travel rail 3 if the two running gear groups 6 and 7 are each fixed on the drive span 37 of the continuous drive 36. Because of the circumstance that the drive span 37 can solely be stressed by tension between the two running gear groups 6 and 7 as a result of the occurring strains of the storage and retrieval device, fixing the base of the storage and retrieval device by the attachment indicated in FIG. 9 to the drive span 37 by tension-fixed connections 38 is sufficient. For the sake of comprehensibility, the running gear groups 6 and 7 are only indicated by the running wheels 8 in FIG. 9.
[0034] In order that heavy loads can also be accommodated by the lift truck 15, according to FIG. 10, a mast-parallel guide mast 40 connected to the mast 1 by tension and pressure struts 39 can be provided on the side of the mast 1 facing away from the mast support 2, which guide mast is supported via a running gear group 41 on the travel rail 3 and has a lift drive 42 for the lift truck 15 guided between the mast 1 and the guide mast 40. In this case, synchronization of the lift drive 42 and the drive 20 for the belt drive 17 on the side of the mast 1 is to be ensured. However, a common drive can also be provided for the lift movement of the lift truck 15 on the side of the mast 1 and on the side of the guide mast 40.
