JP5022189B2 - Elevating transfer equipment for automatic warehouse - Google Patents

Description

The present invention relates to automatic warehouse for elevating transfer device that having a (is if the following two collectively referred to as "belts") timing belt or chain.

  There are many automated warehouses, but from the viewpoint of loading and unloading, a system that loads and unloads with one stacker crane and each shelf (or multiple shelves) are provided. It can be broadly classified as a system that uses a horizontal traveling self-propelled carriage. The latter self-propelled cart type automatic warehouse has a load elevating device (lift device) for delivering the load to the shelves of each stage and the loading / unloading conveyor.

  Even if it is a stacker crane or a self-propelled cart type automatic warehouse, the loading platform (carriage, lifting platform) can be moved up and down on the mast (post, column), and the loading platform can be raised and lowered in the stacker crane. An example of the system is disclosed in Patent Document 1 (particularly FIG. 3), and an example of a lifting / lowering transfer device for a self-propelled cart system automatic warehouse is disclosed in Patent Document 2.

  Whether it is a stacker crane or a self-propelled trolley type automatic warehouse loading / unloading device, the loading platform is a belt wrapped around a group of sprockets and pulleys (hereinafter, both may be collectively referred to as “pulleys”). It is fixed, and the platform can be raised and lowered to an arbitrary height position by driving the belts with a motor. In addition, one of the groups of pulleys is a driving pulley that is rotated by a motor. However, the driving pulley and the belt need to keep the meshing state firmly, and therefore, both patent documents 1 , 2, the belts are generally meandering at the position of the drive pulleys, and in order to hold the belts in a meandering state, both the upper and lower sides sandwiching the drive pulleys The pulleys are arranged so as to be largely deviated from the drive pulleys in a direction perpendicular to the rotation axis.

On the other hand, if the drive pulleys and the pulleys arranged above and below the mast are attached to the mast, and the mast is formed hollow and a part of the pulleys is arranged in the hollow portion of the mast, there is an advantage that the drive system can be made compact. (In Patent Document 2, the drive pulleys are attached to a member different from the mast, and the pulleys arranged above and below the drive pulleys are attached to the mast.)
JP 2006-36470 A Japanese Patent Laid-Open No. 11-118630

For example, in a lifting / lowering transfer device of a self-propelled cart system automatic warehouse, as shown in FIG. 16, idle pulleys 101 and 102 for tension adjustment are arranged at the upper and lower height positions of the driving pulleys 100. In this case, the support members 103, 104, 105 are fixed to the back surface of the mast 106 with bolts 107 (and nuts) corresponding to the pulleys 100, 101, 102, and fixed to the support members 103, 104, 105. Pulleys 100 to 102 are attached to the bracket 108.

The configuration of FIG. 16 has an advantage that the transfer device can be made compact because about half of the belt 109 can be built in the hollow portion of the mast 106. The inventor of the present application examined the power transmission device having such a configuration and found that there is room for improvement in the relationship between the tension acting on the belts 109 and the support members 103 to 105 (in FIG. 16, reference numeral 111 denotes The upper pulley is indicated by reference numeral 110.

That is, in the configuration of FIG. 16, the belts 109 are always under tension, and therefore, the idle pulleys 101 and 102 have an external force to pull them away from the mast 106 as shown by the white arrows. It is working. In particular, a strong pulling force acts on the upper idle pulleys 101 (the tension becomes stronger when the loading platform 110 is raised, so that the pulling external force acting on the upper idle pulleys 101 is further increased). In the configuration in which the pulleys 100 to 102 are attached to the separate support members 103 to 105, the upper and lower support members 108 must be firmly fastened to the mast 106 so that the idle pulleys 101 and 102 are not detached from the mast 106. Therefore, it has been clarified that there is a problem that the support member 108 must be enlarged or the number of bolts 107 must be increased.

The present invention has been made based on these findings, it is an object of the provide child a liftable transfer apparatus which overcomes the aforementioned problems.

The lifting / lowering transfer device according to the present invention has two idle transmission wheels rotating in the same direction, and an intermediate transmission wheel arranged in parallel next to the idle transmission wheel, the idle transmission wheel and the intermediate transmission wheel. The belt or chain is wound so as to be shifted in the direction orthogonal to the rotation axis and to rotate in the opposite direction. Therefore, the belt or chain is large when viewed from the axial direction of each transmission wheel. It has a power transmission device that meanders .
The belt or chain lifts and lowers the loading platform attached to the mast and circulates in the vertical direction. The two idle transmission wheels are arranged up and down, and the intermediate transmission wheel is up and down idle. In the configuration arranged at a height position between the transmission wheels, an integral structure support body is arranged between the idle transmission wheel and the intermediate transmission wheel, and the idle transmission wheel is rotated on the support body. freely and the supporting to the one bracket the intermediate transmission wheel provided to the other bracket for rotatably supporting projects in opposite directions, the intermediate transmission wheel, which is fixed to the other bracket It is attached to the bearing plate. It should be noted that the bracket is not good be referred to as a support member.

2 claims invention, in claim 1, before Symbol bed and has the support is fixed to the rear portion on the opposite side of the mast, to the support, as the one bracket and the other bracket, an outward bracket facing the outside of the mast and inwardly bracket facing the hollow portion of the mast is provided with separated up and down, and supporting the idle gear wheel in the inward bracket, the outward The intermediate transmission wheel is supported by a bracket.

The invention of claim 3 according to claim 2, wherein the support, which is supported by one outwardly bracket and two inwardly bracket disposed above and below is provided, the outward bracket intermediate while transmission wheel is in driving wheels, wherein are respectively the idle Den wheel inwardly brackets vertically installed, and is provided with a tensioner for vertically moving the upper and lower idle transmission wheel, respectively.

In the first aspect of the invention, since the idle transmission wheel and the intermediate transmission wheel rotate in opposite directions when the chain or the belt circulates, the tension of the chain or the belt acts to attract the idle transmission wheel to the intermediate transmission wheel. To do.

Since one bracket that supports the intermediate transmission wheel and the other bracket that supports the idle transmission wheel are provided on the support body in opposite directions, both transmission wheels are supported by the tension of the chain or belt. Therefore, it is not necessary to make the bracket fixing part excessively sturdy because the bolt is not tensioned when the bracket is fixed to the support with a bolt. Absent. In addition, when the support is fixed to other members with bolts, no tension acts on the bolt itself, so there is no need to make the fixing part of the support excessively sturdy, and the support itself However, it is sufficient if the strength is such that it is not deformed by the pressing force of the transmission wheel.

Thus, in the invention of claim 1, and it is not necessary to excessive strength of the fixing portion of the bracket and the fixed part of the support, it is not necessary to the bracket and the support in overly rugged construction As a result , the power transmission device can be reduced in size and weight. Further, since each driving wheel can be unitized built-power transmission device to a support, it is possible to save also labor for assembly to handling and various devices and equipment transporting and storing, and the like.

In the configuration of claim 3, since the Seal Script toner is embedded, into a unit as a whole, yet Kino power transmission mechanism with Seal Script whitener (drive mechanism), is more preferable.

  Next, an embodiment of the present invention will be described with reference to the drawings. This embodiment is applied to an elevating transfer device in a self-propelled cart type automatic warehouse. First, an overview of the entire automatic warehouse will be described with reference to FIGS. 1 is a partial schematic perspective view, FIG. 2 is a partial schematic plan view, and FIG. 3 is a partial plan view.

(1). Outline of automatic warehouse The automatic warehouse is composed of a pair of hangars 2 arranged across the transfer passage 1, and a pair of left and right temporary storage shelves 3 connected to one end (front end) of the left and right hangars 2, respectively. And a pair of right and left lifting / lowering transfer devices 4 arranged in front of the left / right temporary storage shelf 3, a loading / unloading conveyor 5 arranged in front of the left / right lifting / lowering transfer devices 4, and the loading / unloading conveyor 5. A main conveyor 6 for delivering the load W to the vehicle is provided. In addition, the entering / exiting conveyor 5 can also be a multistage system (refer to the one-dot chain line in FIG. 1).

  As a usage mode of the pair of loading / unloading conveyors 5 and the lifting / lowering transfer device 4, one loading / unloading conveyor 5, the lifting / lowering transfer device 4, the other loading / unloading conveyor 5 and the lifting / lowering transfer device 4 are dedicated to loading. And a method used exclusively for unloading (load flow mode indicated by black arrows in FIG. 2), a method of using both the left and right loading / unloading conveyors 5 and the lifting transfer device 4 for loading and unloading, etc. Can be set as needed.

  The hangar 2 has multistage storage shelves 7 that open toward the transfer passage 1, and self-propelled carts 8 are arranged in the transfer passage 1 so as to be able to run horizontally corresponding to the storage shelves 7 of each stage. ing. Temporary storage shelves 3 are provided at the level of each shelf 3 of the hangar 2.

  The hangar 2 and the temporary storage shelf 3 are integrally continuous, and a skeleton is constituted by a large number of columns and horizontal frames. Rails (front frames) 9 exposed in the transfer passage 1 are disposed at the storage shelves 7 and the temporary storage shelves 3 in each stage, and the self-propelled carriage 8 runs on the upper surface of the rails 9. The storage shelf 7 employs a flat shelf system having shelf plates. Since the relationship with the present application is thin, the details are omitted, but the self-propelled carriage 8 shown in FIG. 3 includes a pair of front and rear picking devices 10, and the picking device 10 moves the load W laterally (sliding). The load W is transferred between the self-propelled carriage 8, the storage shelf 7, and the temporary storage shelf 3. The temporary shelf 3 is a roller conveyor system, and the load W moves back and forth on the upper surface of the temporary shelf 3.

The elevating transfer device 4 includes a mast 11 and a loading platform 12 attached to the mast 11 so as to be movable up and down. The left and right masts 11 are arranged back-to-back, and therefore the loading platform 12 is located outside the mast 11. The loading platform 12 is of a roller conveyor type, and the load W can be transferred to the loading / unloading conveyor 5 and the loading platform 12 by making it the same height as the loading / unloading conveyor 5. By aligning to the same height as the shelf 3, the load W can be transferred to the loading platform 12 and each temporary shelf 3.

  Next, details of the elevating transfer device 4 will be described. In the present application, front / rear / left / right / internal / external terms are used as terms indicating directions. These terms are basically the same as the longitudinal direction of the transfer passage 1 in a plan view as shown in FIG. Front / rear / left / right words are used with reference to the same direction, and inner and outer words are used with reference to the longitudinal center line of the transfer passage 1. For the front view, rear view, and side view, the front and back views are used based on the direction from the front to the back, and the drawing viewed from the left and right is called the side view. However, for the mast 11 and the drive system, internal and external terms may be used on the basis of the hollow portion of the mast 11, and in this case, the front-rear and left-right relations are reversed from the display of FIG.

(2). Basic structure of the lifting / lowering transfer device The details of the lifting / lowering transfer device 4 are shown in the drawings of FIG. First, a basic configuration will be described with reference to FIGS. 4 is a schematic front view showing the movement of the loading platform 12, FIG. 5 is a partial front sectional view, FIG. 6 is a plan sectional view in a state where the loading platform 12 is raised to an intermediate height, and FIG. FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6 in a lowered state.

As can be understood from FIG. 6, the mast 11 uses a light metal extruded product such as aluminum . The mast 11 is formed with a pair of first guide grooves 14 that are open on both the front and rear sides, a second guide groove 15 that is open on the left and right sides, and a back space 16 that is open on the left and right sides. The loading platform 12 includes a main frame 17 that surrounds the outer half of the mast 11 and a load receiving portion 18 provided in the lower portion thereof. The main frame 17 includes a plurality of upper and lower first guides that enter the first guide groove 14. A roller 19 and a pair of upper and lower second guide rollers 20 abutting from both the front and rear sides are provided on the side surface without the second guide groove 15, and the guide grooves 14, 15 and the guide rollers 19, 20 provide guidance. The loading platform 12 moves up and down.

The platform 12 is driven up and down by a timing belt (which may be a chain) 21. As shown in FIGS. 4 and 5, the timing belt 21 has a loop shape, and an upper pulley (upper transmission wheel) 23 rotatably attached to the upper end portion of the mast 11 via a bracket 22 and the lower end of the mast 11. A lower pulley (lower transmission wheel) 24 that is rotatably attached to the part, a pair of upper and lower idle pulleys 25 and 26 provided at the lower part and inside of the mast 11, and the inner side of the upper and lower idle pulleys 25 and 26 (based on the mast 11 It is wound around five pulleys of a drive pulley 27 provided on the outer side. Most of the idle pulleys 25 and 26 enter the back space 16 (see FIG. 16) of the mast 11.

The timing belt 21 is pressed and fixed to the main frame 17 of the loading platform 12 by a pressing member at a location between the upper pulley 23 and the lower pulley 24. In the present embodiment, drive movement pulley 27 corresponds to the intermediate transmission wheel according to claim.

Each of the pulleys 23 to 27 is disposed in a pair of front and rear, and presser rollers 28 and 29 for preventing tooth skipping are in contact with the upper pulley 23 and the drive pulley 27, respectively. The upper idle pulley 25 is held by a manual tensioner 30 so as to be adjustable in height, and the lower idle pulley 26 is always urged upward by an auto tensioner 32 having a spring 31 (details of both tensioners 30 and 32). Will be described later). Drive pulley 27 is driven by the lifting motor 34 via a reduction gear 33.

As shown in FIG. 6, a pair of inner dovetail grooves 35 that are opened inward are formed on the inner surface of the mast 11 and on both front and rear ends (that is, the opening edge of the back space 16). , 26 and the drive pulley 27 are attached to a plate-like support 36 fixed to the inner side surface (the rear side in the claims) with bolts 43 and nuts 44 using the inner dovetail groove 35. (Details will be described later).

  As shown in FIGS. 4, 5, and 7, the lower end of the mast 11 is constituted by a base 37 such as a casting, and an aluminum extruded product is fitted and fixed to the base 37 from above and below. The base 37 is supported by an adjuster bolt 38 so that the height can be adjusted. In addition, an absorber 40 having a movable rod 39 is fixed to an outer surface portion of the base 37 located on the loading platform 12 side. The absorber 40 is for absorbing an impact when the loading platform 12 runs away due to breakage of the timing belt 21 or the like, and the main frame 17 of the loading platform 12 is provided with a stopper 41 that contacts the movable rod 39 of the absorber 42.

(3). Attachment Structure of Drive Pulley Next, the attachment structure of the drive pulley 27 and the idle pulleys 25 and 26 will be described with reference to FIGS. 8 to 11 in addition to the previous drawings. 8A is a sectional view taken along the line VIIIA-VIIIA in FIG. 7, FIG. 8B is a sectional view taken along the line BB in FIG. 9, and FIG. 10A is a separated view as viewed from the XA-XI viewing direction of FIG. 8, and FIG. 10B is a sectional view taken along the line BB of FIG. In the XIA-XIA perspective view, (B) is the XIB-XIB perspective view of FIG. 10, and FIG. 12 is the separated view as viewed from the XII-XII viewing direction of FIG. In this embodiment, socket bolts are frequently used, but hexagonal holes are omitted.

  For example, as shown in FIGS. 7 to 9 (see also FIG. 14), the above-described support 36 is disposed on the inner side surface of the lower portion of the mast 11 (the rear surface with reference to the loading platform 12). The support 36 is made of a single metal plate and has a vertically long shape that covers a part of the back space 16 from behind. For example, as shown in FIG. 8, the support 36 is formed in the inner dovetail groove 35 of the mast 11. It is fastened to the mast 11 by a key bolt 43 fitted in such a manner that it cannot be removed and a nut 44 screwed to the key bolt 43 (a bolt may be screwed into the key nut).

The support 36 has a pair of front and rear outward brackets 45 for supporting the drive pulley 27, a pair of front and rear upper brackets 47 to which the upper idle pulley 25 is attached, and a pair of front and rear portions to which the lower idle pulley 26 is attached. The lower inward bracket 48 is fixed by bolts 49 (see FIGS. 9 and 12) and 50 (see FIGS. 8 and 14), respectively. The inward brackets 47 and 48 are one bracket described in the claims, and the outward bracket 45 is the other bracket described in the claims.

The outward bracket 45 is fixed to the outer surface of the support body 36 and exposed to the outside of the mast 11, and the inward brackets 47 and 48 are fixed to the inner surface of the support body 36 to enter the back space 16 of the mast 11. It has entered. As shown in FIG. 11A , the outward bracket 45 is formed in a laterally convex shape in a front view.

For example, as can be easily understood from FIG. 9, a bearing plate 51 is fixed to the opposing surfaces of the front and rear outward brackets 45 by bolts 52, and the rotating shaft 53 of the drive pulley 27 is a bearing via a bearing 54. It is pivotally supported on the plate 51. Needless to say, the drive pulley 27 is held on the rotary shaft 53 so as not to be relatively rotatable by means such as a key. The front and rear bearing plates 51 are connected by a reinforcing plate 55 disposed on the side opposite to the mast 11.

The bearing plate 51 is fastened by a bolt 52 at a position near the tip of the outward bracket 45. As shown in FIG. 12, the outward bracket 45 has an arcuate recess 45a for avoiding a collision with the bearing 54. Forming.

As shown in FIG. 10, oval shaped receiving portions 56 a are formed at both ends of the support shaft 56 of the pressing roller 29 that is set with the driving pulley 27, and the receiving portions 56 a are formed on the bearing plate 51. A longitudinal guide groove 57 is slidably fitted. The receiving portion 56a is pressed and fixed by a bolt 58 screwed into the bearing plate 51. Of course, it is possible to adopt other shaft support structures. The receiving portion 56a of the support shaft 56 is fixed to the bearing plate 51 with a bolt 56b. In this case, by making the hole formed in the bearing plate 51 in order to insert the bolt 56b into a long hole which is long in the horizontal direction, the position where the pressing roller 29 contacts the belt 21 can be adjusted.

As shown in FIG. 8, both the motor 34 and the speed reducer 33 are arranged concentrically so that the rotating shaft extends horizontally, and the motor 34 is fastened to the speed reducer 33 with a bolt 60. It is fixed to the first bracket 61 to the second bracket 62 and the support 36 through. As shown in FIG. 11 , the first bracket 61 has an arcuate recess 61 a that opens toward the opposite side of the support 36, and two upper and lower portions are fixed to the support 36 with bolts 63. Yes. On the other hand, for example, as shown in FIGS. 8 and 9, the second bracket 62 is fastened to the side surface of the first bracket 61 with a bolt 64.

  The second bracket 62 is formed in a laterally convex shape in a side view, and a base portion thereof is fastened to the first bracket 61. The second bracket 62 has a hole 62 a into which the circular end portion of the speed reducer 33 is fitted. The speed reducer 33 is fixed to the second bracket 62 with a bolt 65.

As shown in FIGS. 9 and 10, the first connecting plate 67 is fastened to the end surface of the output shaft 66 of the speed reducer 33 by a flat bolt 68, while the rotating shaft 54 of the drive pulley 27 is connected to the bearing plate 52. A large-diameter portion 54a exposed to the outside is formed, and a second connecting plate 69 is fastened to the large-diameter portion 54a with a flat bolt 70, and the first connecting plate 67 and the second connecting plate 69 are bolts 71. It is concluded with. As shown in FIG. 11 (B), both connecting plates 67 and 69 are formed in a substantially square shape in a side view, and four corner portions chamfered in an arc shape are fastened with bolts 71. As described above, the arcuate recess 61a is formed in the first bracket 61, and this recess 61a is for avoiding a collision with the connecting plates 67 and 69.

  When both the connecting plates 67 and 69 are fastened with the bolts 71, the bolts 71 are screwed into the tapped holes of the second connecting plate 69 through the through holes formed in the first connecting plate 67. The through holes and the tapped holes are circular. While being arranged at four locations on the circumference, the presence of the second bracket 62 hides the range of about 90 degrees in the circumferential direction from the inside of the second bracket 62 in the connection plates 67 and 69 in a side view. Yes. Therefore, if no measures are taken, the pair of through holes and the tapped holes in the connecting plates 67 and 69 are always hidden by the second bracket 62. In that case, the three bolts 71 are used for fastening. After that, it is necessary to energize the motor 33 for a short period of time and rotate the connecting plates 67 and 69 to expose the pair of through holes and tap holes to the outside of the second bracket 62. It is.

  On the other hand, in the present embodiment, as shown in FIG. 11A, a long hole extending in an arc shape at the base of the second bracket 62 with the same curvature as the rotation locus of the bolt 71 (or through hole and tap hole). 72 is formed. The long hole 72 has a groove width through which the head of the bolt 71 passes, and the bolt 71 can be screwed into the tap hole through the long hole 72. For this reason, it becomes possible to rotate the four bolts 71 without performing an operation of energizing the motor 34 one by one. As a result, it is possible to improve the ease and safety of the work of attaching / removing the motor 34.

(4). Attachment Structure of Idle Pulley Next, the attachment structure of the idle pulleys 25 and 26 via the tensioners 30 and 32 will be described with reference to FIG. 13 and subsequent drawings. 13 is a cross-sectional view taken along line XII-XII in FIG. 7, FIG. 14 is a side view of the mast 11 with the drive pulley 27 omitted, and FIG. 15 is a separated side view.

First, the upper idle pulley 25 and the manual tensioner 30 will be described. As mentioned previously, the support 36 is the upper inward bracket 47 a pair of front and rear entering into the back voids 16 of the mast 11 is bolted 50, as shown in FIG. 13, the upper front and rear The direction bracket 47 is regulated in the front-rear direction by the inward opening surface 16 a of the back recess 16 in the mast 11 and the inner surface 16 b on the back side. On the other hand, as shown in FIG. 14, the bolt hole 74 formed in the support body 36 for fixing the upper inward bracket 47 is a vertically long slot.

A support shaft (or rotating shaft) 75 of the upper idle pulley 25 is fitted into the upper inward bracket 47, and the front and rear upper inward bracket 47 is integrated by an upper stay 77 fixed to the upper end of the upper end bracket 47 with a bolt. Therefore, the left and right sliders 78 can move up and down together. Upper idle pulley 25 is waiting rotatably fitted via a bearing supporting shaft 75.

Then, the inner surface of the upper support plate 76 fixed to the mast 11 arranged on the upper side of the support 36, Horizontal support member 79 located above the upper stay 77 is fixed by a bolt, support member 79 A pair of front and rear adjustment bolts 80 with lock nuts are screwed in from above, and the tips of the adjustment bolts 80 are in contact with or fitted to the upper stay 77. Therefore, the height of the upper idle pulley 25 can be adjusted by loosening the bolt 50 and rotating the adjusting bolt 80. As can be understood from this description, the upward inward bracket 47 also constitutes a part of the manually adjustable tensioner 30 in this embodiment.

  It is also possible to adopt a configuration in which a slider is mounted on the upward inward bracket 47 so as to be movable up and down, and the upper idle pulley 25 is supported by this slider, and the slider is moved up and down by the adjusting bolt 80. It is also possible to fix the support member 79 to the support body 36, and to make the upper support plate 76 and the upper stay 77 integral.

Next, the auto tensioner 32 will be described. In the present embodiment , the downward inward bracket 48 constitutes a part of the auto tensioner 32, and as shown in FIG. 13, upper and lower longitudinal guide grooves 81 are formed on opposing surfaces of the downward inward bracket 48. A slider 82 is fitted into the lever movably up and down, and a supporting shaft (or rotating shaft) 78 of the lower idle pulley 26 is supported by the front and rear slider 82. Further, as shown in FIG. 15, the front and rear sliders 82 are integrally connected by a horizontal bar 84 at the lower end thereof.

On the other hand, a lower stay 85 is fixed to the lower ends of the front and rear lower inward brackets 48 with bolts, and a pair of front and rear bolts 86 are screwed into the lower stay 85 so that a pair of front and rear is lowered to the bolts 86 and the horizontal bar 84. A spring receiver 87 and an upper spring receiver 88 are attached to each other, and the spring 31 is interposed between the upper and lower spring receivers 87 and 88. Needless to say, since the lower idle pulley 26 is always urged upward by the spring 31, the tension is always applied to the timing belt 21, and the bolt 86 is rotated to operate the upper and lower springs. By changing the interval between the receivers 87 and 88, the strength of the tension acting on the timing belt 21 can be adjusted.

As clearly shown in FIG. 15, the support 36 is formed with an upward recess 89 and a downward recess 90 for avoiding a collision between the idle pulleys 25 and 26 and the timing belt 21. An auxiliary plate 91 is disposed below the support 36. The auxiliary plate 91 is fixed across the mast 11 and the base 37. For this reason, the auxiliary plate 91 also serves as a member for fixing the mattos 11 as an extruded product to the base 37. In the auxiliary plate 91, an upward recess 92 is formed in order to enable the rotation of the bolt 81 in the auto tensioner 32.

(5). Conclusion As can be readily understood from FIG. 7, for example, the drive pulley 27 and the idle pulley 25, 26 is adapted to rotate in opposite directions, Accordingly, when the timing belt 21 circulates mainly bed the timing belt 21 due to a load 12 is large kina tension acts, this tension, acted as to approach each other from the drive pulley 27 and the idle pulley 25, 26.

  In the present invention, since the outward bracket 45 and the inward brackets 47 and 48 are provided oppositely on the front and back of the support 36, the external force caused by the tension of the timing belt 21 is different from the inward brackets 47 and 48. Both the outward bracket 45 and the support 36 are brought into close contact with each other, and the action of pulling the inward brackets 47 and 48 away from the support 36 does not occur.

  Therefore, it is not necessary to make the fixing structure excessively strong in fixing the inward brackets 47 and 48 to the support body 36. For this reason, the inward brackets 47 and 48 and the support body 36 are increased in size ( Alternatively, it is possible to avoid thickening). Further, the tension generated by the timing belt 21 merely acts to sandwich the support 36 between the outward bracket 45 and the inward brackets 47 and 48, and acts to peel the support 36 from the mast 11. For this reason, it is not necessary to provide an excessively strong structure for fixing the support 36 to the mast 11.

By the way, as for the arrangement relationship of the rotating shafts of the drive motor 34 and the speed reducer 33, the rotating shaft of the speed reducer can be horizontal and the rotating shaft of the motor 34 can be vertical. 33 requires a bevel gear mechanism, which complicates the structure, increases cost, and tends to increase in size as a whole. On the other hand, in the present embodiment, the rotation axis of the motor 34 and the rotation axis of the speed reducer 33 are concentric (or parallel). Therefore, the structure is simple and the cost can be suppressed.
Then, by using the connecting plates 67 and 69 to transmit the power to the drive pulley 27, a complicated gear mechanism can be eliminated and the drive system can be made compact. Since the long hole 72 is provided, the labor of assembling and disassembling can be reduced. This is one of the advantages of the embodiment. It is also possible to integrate the first bracket 61 and second bracket 62.

(6). Others The present invention can be embodied in various ways other than the above embodiment. For example, the application target is not limited to a transfer device of an automatic cart system automatic warehouse, but can be applied to a stacker crane. It can also be embodied as a power transmission device as a general-purpose product (or a dedicated product) .

  The support is not necessarily in the form of a plate, and can be a frame structure using a steel material such as steel or a steel plate, or a die-cast product.

It is a partial schematic perspective view of the automatic warehouse which concerns on this embodiment. It is a partial schematic plan view of an automatic warehouse. It is a partial top view of an automatic warehouse. It is a typical front view which shows the motion of a loading platform. It is a partial vertical front view of a transfer apparatus. It is a plane sectional view in the state where the loading platform was raised to midway height. FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. (A) is a sectional view taken along the line VIIIA-VIIIA of FIG. 7, and (B) is a view taken along the line BB of (A). It is a partially broken isolation | separation top view of the part centering on the drive pulley. (A) is the XIA-XIA partial sectional view of FIG. 8, (B) is the BB sectional view of (A). (A) is a separated view seen from the XA-XA view direction of FIG. 10, (B) is a XIB-XIB view sectional drawing of FIG. FIG. 10 is a separation view seen from the XII-XII viewing direction of FIG. 9. FIG. 8 is a sectional view taken along line XIII-XIII in FIG. 7. It is a side view (rear view) of the mast in a state where the drive pulley is omitted. FIG. It is a figure which shows a prior art example.

1 transfer passage 2 hangar 3 temporarily placing rack 4 elevating transfer device 5 Goods Movement conveyor 7 storage shelves 8 autonomous guided vehicle 11 main frame 21 timing belt 25 idle pulleys constituting the mast 12 loading platform 17 bed (idle transmission ring)
27 Drive pulley (intermediate transmission wheel)
30 Manual tensioner 32 Auto tensioner 3
34 Lifting motor 36 Support body 45 Outward bracket (the other bracket)
47, 49 Inward bracket (one bracket)
43 Bolts for fixing the support
44 Nuts to secure the support
49 Bolt for fixing the outward bracket to the support
50 Bolt for fixing the idle pulley pulley to the support

Claims (3)

Two idle transmission wheels rotating in the same direction and an intermediate transmission wheel arranged in parallel next to the idle transmission wheel, the idle transmission wheel and the intermediate transmission wheel being in a direction perpendicular to the rotation axis thereof staggered and belt or chain is wound so as to rotate in the opposite direction is arranged closer, Therefore belt or chain is meandering increases when viewed from the axial direction of the transmission wheel, a power transmission device that Has
The belt or chain lifts and lowers a loading platform attached to the mast, and circulates in the vertical direction. The two idle transmission wheels are arranged vertically, and the intermediate transmission wheel is a vertical idle transmission wheel. Arranged at a height position between,
An integral structure support body is disposed between the idle transmission wheel and the intermediate transmission wheel, and one bracket that rotatably supports the idle transmission wheel and the intermediate transmission wheel are rotatably supported on the support body. The other bracket to be supported is provided so as to protrude in opposite directions, and the intermediate transmission wheel is attached to a bearing plate fixed to the other bracket.
Elevating transfer equipment for automatic warehouse. Wherein the loading platform of the previous SL mast the support on the rear portion of the opposite side is fixed to said support, said as one of the bracket and the other bracket, and an inward bracket facing the hollow portion of the mast An outward bracket facing the outside of the mast is provided apart from the upper and lower sides, the idle transmission wheel is supported by the inward bracket, and the intermediate transmission wheel is supported by the outward bracket,
A lifting / lowering transfer device for an automatic warehouse according to claim 1 . While the the support, one outwardly bracket and two inwardly bracket disposed above and below is provided, which supported the intermediate transmission wheel in the outward bracket is in the drive wheels, wherein and each of the idle Den wheel inwardly brackets vertically installed, and is provided with a tensioner for vertically moving the upper and lower idle transmission wheel, respectively,
A lifting / lowering transfer apparatus for an automatic warehouse according to claim 2.

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