JP2017088354A - Pallet drop arrester for highrised warehouse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to easily perform installation work for a pallet drop arrester and to reduce a cost required for installation of the pallet drop arrester.SOLUTION: A pallet drop arrester 10, which can be post-installed onto a rack 1 of a highrised warehouse, comprises: a pair of stopper parts 11 which are extended between adjacent respective struts 3A, 3C in a cross direction X, and are respectively adjacent to opposite side faces of adjacent palettes 2 in an orthogonal direction Y; and strut fitting parts 12 which are respectively integrally provided at both ends of the stopper part 11 in the cross direction X and are respectively fitted into adjacent respective struts 3A, 3C in the cross direction X, and which are loaded on palette support members 4A, 4B which are fixed to respective struts 3A, 3C.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pallet drop prevention device used for a rack of a three-dimensional warehouse.

  The three-dimensional warehouse includes a plurality of support columns that are erected on the front, rear, left, and right sides, and arm members that are attached between the front and rear columns and support the pallet. Then, the pallet is taken in and out between the left and right columns.

  In the event of an earthquake, the pallet may move back and forth, left and right, and the pallet may come off the arm member and fall.Therefore, take measures to install a pallet drop prevention device that has a stopper member that restricts the movement of the pallet on the arm member. It has been. As one of countermeasures, a configuration is known in which a stopper member that restricts movement of the pallet in the left-right direction is fixed to the arm member by welding (for example, see Patent Document 1). A configuration is also known in which a stopper member that restricts the movement of the pallet in the left-right direction is retrofitted to the arm member by a U bolt and a nut (see, for example, Patent Document 2).

JP2013-21689A JP 2013-230911 A

  In the configurations described in Patent Documents 1 and 2, when fixing the stopper member of the pallet drop prevention device to the arm member, it is necessary to temporarily remove the pallet from the arm member for welding work or fastening work. For this reason, it takes time to install the pallet drop prevention device, and it is necessary to suspend the three-dimensional warehouse for a long time.

  Moreover, when using a U-bolt and a nut when attaching the stopper member of a pallet fall prevention apparatus later, the expense of a U-bolt and a nut is needed. In particular, when welding the stopper member of the pallet drop prevention device, in addition to the cost related to welding, there is also a cost for curing around the welding, so that a large amount of work is required for mounting the stopper member of the pallet drop prevention device. Necessary.

  In view of the above, an object of the present invention is to easily perform the mounting operation of the pallet drop prevention device and reduce the cost for mounting the pallet drop prevention device.

  The pallet drop prevention device for a three-dimensional warehouse according to the present invention includes a plurality of support columns erected at predetermined intervals in a loading / unloading direction of a pallet on which a load is placed and a direction orthogonal to the direction, and the adjacent columns in the loading / unloading direction. A pallet drop prevention device that can be attached later and is used in a three-dimensional warehouse provided with a pallet support member that is fixed to each column and extends in the orthogonal direction to support the pallet, and restricts the movement of the pallet in the orthogonal direction. A stopper portion having a pair of stopper surfaces extending between the struts adjacent in the loading / unloading direction and adjacent to the opposing side surfaces of the pallet adjacent in the orthogonal direction, and the stopper portion in the loading / unloading direction. It is integrally provided at both ends, and is fitted into each of the columns that are adjacent in the loading / unloading direction, Characterized in that it and a post fitting portion having a U-shaped portion which is placed on the pallet support member fixed to the respective posts.

  Moreover, the width adjustment part which can adjust the width | variety of the said U-shaped part of the said support | pillar fitting part according to the width | variety of the said support | pillar is provided. Moreover, the length adjustment part which can adjust the length of the said insertion / extraction direction of the said stopper part according to the distance between the said support | pillars is provided, It is characterized by the above-mentioned.

  Further, the stopper surface of the stopper portion is provided with a non-slip portion that stops the pallet from sliding when the pallet contacts the stopper surface.

  According to the present invention, the mounting operation of the pallet drop prevention device can be easily performed, and the cost for mounting the pallet drop prevention device can be reduced.

  Moreover, since the width adjustment part and the length adjustment part are provided, it can adjust easily even if the dimension of a support | pillar and the dimension of a pallet differ, and it can apply to various three-dimensional warehouses. Further, since the anti-slip portion is provided, when the pallet moves in the left-right direction and comes into contact with the stopper portion, the movement of the pallet can be suppressed to prevent the pallet from dropping from the rack.

It is a perspective view which shows the rack structure of the three-dimensional warehouse provided with the pallet fall prevention apparatus. It is a top view which shows the rack structure of the three-dimensional warehouse provided with the pallet fall prevention apparatus. It is a perspective view of the pallet fall prevention device by a 1st embodiment. It is a side view of the rack structure explaining the attachment operation | work of the pallet fall prevention apparatus by 1st Embodiment. It is a side view of the rack structure explaining the attachment operation | work of the pallet fall prevention apparatus by 1st Embodiment. It is a perspective view which shows the modification of a pallet fall prevention apparatus. It is a perspective view which shows the modification of a pallet fall prevention apparatus. It is a perspective view of one unit of the pallet fall prevention device by a 2nd embodiment. It is a state figure explaining the state which assembles the pallet fall prevention device by a 2nd embodiment, (A) shows the state which adjusts width, (B) shows the state which adjusts length, (C) is The state after adjustment is shown. It is a perspective view of one unit of the pallet fall prevention device by a 3rd embodiment. It is a perspective view of one unit of the pallet fall prevention device by a 4th embodiment. It is a disassembled perspective view of four units of the pallet fall prevention apparatus by 5th Embodiment. It is an expansion perspective view of the stopper part of the pallet fall prevention apparatus by 6th Embodiment. It is an enlarged view of the stopper part which shows the modification of the pallet fall prevention apparatus by 6th Embodiment.

  A pallet drop prevention device 10 used in a three-dimensional warehouse according to a first embodiment of the present invention will be described with reference to the drawings. 1 to 3, the direction in which the pallet 2 is put in and out is the front-rear direction X, and the direction orthogonal to the front-rear direction X is the left-right direction Y.

  In the three-dimensional warehouse, a large number of racks 1 for storing pallets 2 are arranged in the vertical and horizontal directions. As shown in FIGS. 1 and 2, the rack 1 includes columns 3 </ b> A, 3 </ b> B, 3 </ b> C, 3 </ b> D standing upright at positions corresponding to the four corners of the pallet 2, and between the columns 3 </ b> A, 3 </ b> C and the columns Pallet support materials 4A and 4B provided between 3B and 3D, respectively.

  Between the support pillars 3A and 3C, oblique members 5A and 5B are provided for connecting and reinforcing the support pillars 3A and 3C. Further, oblique members 5C and 5D are provided between the columns 3B and 3D to connect and reinforce the columns 3B and 3D.

  The interval in the left-right direction Y of the support columns 3A, 3B and the support columns 3C, 3D is set in advance according to the length of the pallet 2 in the left-right direction Y. Further, the interval in the front-rear direction X of the support columns 3A, 3C and the support columns 3B, 3D is set in advance according to the length of the pallet 2 in the front-rear direction X. Each of the columns 3A, 3B, 3C, 3D is made of a square pipe steel material having a hollow and square cross section.

  The pallet support member 4A is fixed to the support columns 3A and 3C and extends horizontally in the left-right direction Y. The pallet support members 4Ac and 4Ad are fixed to both ends of the horizontal members 4Aa and 4Ab and extend in the front-rear direction X. And. Each of the horizontal members 4Aa and 4Ab and the pallet receiving members 4Ac and 4Ad is formed of a square pipe steel material having a hollow and square cross section.

  The horizontal members 4Aa and 4Ab are fixed to the inner surfaces of the columns 3A and 3C facing each other. Both ends of the horizontal members 4Aa and 4Ab extend to the side end portions of the pallet 2, and the pallet 2 is placed on the upper surface of the pallet receiving members 4Ac and 4Ad fixed to both ends of the horizontal members 4Aa and 4Ab. The

  Front stoppers 4Ae and 4Ae for restricting the pallet 2 from projecting forward are provided at the front ends of the pallet receiving members 4Ac and 4Ad, respectively. The front stoppers 4 </ b> Ae and 4 </ b> Ae are metal plate members fixed to the front ends of the pallet receiving members 4 </ b> Ac and 4 </ b> Ad by bolts or welding, and are protruded and fixed upward so as to contact the front end surface of the pallet 2. The rear side of the rack 1 has a side wall of a warehouse (not shown), and the protrusion of the pallet 2 to the rear side is restricted by the side wall, but the rear ends of the pallet receiving materials 4Ac and 4Ad are the same as the front stoppers 4Ae and 4Ae. A rear stopper may be provided. Moreover, the pallet support material 4B is comprised from horizontal material 4Ba, 4Bb, pallet receiving material 4Bc, 4Bd, and front stopper 4Be like the pallet support material 4A.

  Pallet drop prevention devices 10 and 10 for restricting movement of the pallet 2 in the left-right direction Y are disposed between the columns 3A and 3C and the columns 3B and 3D, respectively. The pallet drop prevention devices 10 and 10 can be retrofitted between the columns 3A and 3C. The configuration and attachment method related to retrofitting will be described later. Since each pallet fall prevention device 10 has the same configuration, only one pallet fall prevention device 10 will be described below.

  As shown in FIG. 3, when the pallet 2 moves in the left-right direction Y, the pallet drop prevention device 10 is attached to the stopper portion 11 with which the side surface of the pallet 2 abuts and the pallet drop prevention device 10 is attached to the columns 3A and 3C. The support | pillar fitting part 12 to attach is provided.

  The stopper portion 11 includes a pair of long side plates 13 and 14 extending in the front-rear direction X. And the outer surface of the side plates 13 and 14 constitutes a stopper surface. The pair of side plates 13 and 14 are connected to each other only at the center by a connecting plate 15 and are not connected at both ends. Therefore, at both ends of the pallet drop prevention device 10, U-shaped portions 17 into which the columns 3 </ b> A and 3 </ b> C are fitted are opened outwardly by the inner surfaces 13 a and 14 a of the side plates 13 and 14 and the edge 15 a of the connecting plate 15. Is formed. Further, the U-shaped portion 17 constitutes the column fitting portion 12. In addition, the side plates 13 and 14 are provided with holes 16 and 16 that are used when the pallet drop prevention device 10 is attached to the columns 3A and 3C.

  As shown in FIGS. 2 and 3, when the pallet drop prevention device 10 is disposed between the support columns 3 </ b> A and 3 </ b> C, the support columns 3 </ b> A and 3 </ b> C are fitted into the U-shaped portions 17 and 17 of the support column fitting portions 12 and 12, respectively. The lower edges 13b and 14b of the side plates 13 and 14 in the U-shaped portions 17 and 17 of the column fitting portions 12 and 12 are placed on the upper surfaces of the horizontal members 4Aa and 4Ab.

  In FIG. 3, the height H of the side plates 13 and 14 is set to a height at which the pallet 2 does not get over the side plates 13 and 14 when the pallet 2 also contacts the side plates 13 and 14. Is set to 1/3 to 1/4 of the height of the pallet 2. The width W between the pair of side plates 13 and 14 is set to be slightly wider than the width of the column 3A. The length L of the side plates 13 and 14 is set to be substantially the same as the length between the columns 3A and 3C. The length L1 of the U-shaped portion 17 in the front-rear direction X is set to be slightly shorter than the length of the support post 3A in the front-rear direction X.

  The pallet drop prevention device 10 is formed of a steel plate having a predetermined thickness, and is cut into the shape of the side plates 13 and 14 and the connecting plate 15, that is, after the steel plate is cut into a substantially H shape, the side plates 13 and 14 are cut. And the connecting plate 15 is formed by bending at the boundary portion. The hole 16 is formed by punching. For this reason, the manufacturing cost regarding the pallet fall prevention apparatus 10 can be kept low, and the pallet fall prevention apparatus 10 can be manufactured at low cost.

  Next, attachment of the pallet drop prevention device 10 to the rack 1 will be described. First, a scaffold for installing the pallet drop prevention device 10 is installed in the vicinity of the rack 1. As the scaffolding, whether to install a temporary scaffold, use a moving lifting scaffold, or use a fork part of a stacker crane used in a three-dimensional warehouse with a work floor with handrails, etc. Use one of the appropriate scaffolds.

  FIGS. 4 and 5 show a case where work is performed using a moving lifting scaffold. As shown in FIG. 4, a predetermined number of pallet drop prevention devices 10 are placed on the work floor 100 and moved to the vicinity of the rack 1 to which the pallet drop prevention devices 10 are attached. The worker P performs the attachment work of the pallet drop prevention device 10 with the safety belt 102 attached to the handrail 101 of the work floor 100.

  First, in order to prevent the pallet drop prevention device 10 from falling, one end of a string (not shown) is fixed to the hole 16 (see FIG. 3) of the pallet drop prevention device 10 and the other end is a part of the column 3A or the pallet support member 4A. To fix. In the case of the rack 1 in which the slanting member 5A is inclined so as to be lowered from the front of the worker P toward the back side, the support fitting part 12 on the back side of the pallet drop prevention device 10 is connected to the rack 1. Fit into the back column 3C. Next, the pallet drop prevention device 10 is dropped as shown by an arrow F1 in the drawing so that the front-side column fitting portion 12 of the pallet drop prevention device 10 is fitted into the front-side column 3A.

  As shown by the solid line in FIG. 4, the pallet drop prevention device 10 has the column fitting portions 12 and 12 at both ends fitted into the columns 3A and 3C, and the lower ends of the side plates 13 and 14 as shown in FIG. The edges 13b and 14b are placed on the top surface of the horizontal members 4Aa and 4Ab, thereby being installed in the rack 1. In this way, the pallet drop prevention device 10 can be easily retrofitted to the rack 1.

  Further, as shown in FIG. 5, in the case of the rack 1 in which the oblique member 5 </ b> A is inclined so as to rise from the near side of the worker P toward the far side, the prop on the near side of the pallet drop prevention device 10. The fitting portion 12 is fitted into the support 3 </ b> A on the near side of the rack 1. Next, the pallet drop prevention device 10 is dropped as shown by an arrow F2 in the drawing so that the back side column fitting portion 12 of the pallet drop prevention device 10 is fitted into the back side column 3C. In this case as well, the pallet drop prevention device 10 is installed as in the case of FIG.

  For this reason, even when the pallet 2 is stored in the rack 1, the pallet drop prevention device 10 can be installed, that is, attached to the support columns 3A and 3C, and it is not necessary to be fixed by welding or bolts. Thus, the mounting operation of the pallet drop prevention device 10 can be easily performed, and the cost related to the mounting operation of the pallet drop prevention device 10 can be reduced.

  The operation when the pallet 2 moves due to an earthquake or the like will be described. In FIG. 2, when the pallet 2 rotates in the rack 1 due to an earthquake as shown by a two-dot chain line, the corners of the pallet 2 come into contact with the stopper portion 11 (side plate 13) of the pallet drop prevention device 10 (FIG. 2). 2 (indicated by a broken line portion G), further rotational movement is restricted. For this reason, it is suppressed that the pallet 2 remove | deviates from the pallet receiving material 4Bc, and the fall from the rack 1 of the pallet 2 is prevented.

  In this way, the pallet drop prevention device 10 can be attached to the columns 3A and 3C simply by fitting the U-shaped portion 17 of the column fitting portion 12 of the pallet drop prevention device 10 into the columns 3A and 3C. Further, welding work and bolt fastening work are not required, the mounting work of the pallet drop prevention device 10 can be easily performed, and the cost for mounting the pallet drop prevention device 10 can be reduced.

  Further, since the pallet drop prevention device 10 is formed by bending a steel plate material, the manufacturing cost of the pallet drop prevention device 10 can be kept low, and the pallet drop prevention device 10 can be manufactured at a low cost. .

  Next, a modified example of the pallet drop prevention device 10 will be described. As shown in FIG. 6, the pallet drop prevention device 20 includes a pair of side plates 21, 21 and connecting rods 22, 22, 22 that connect them to each other. The center portions 21a and 21a of the side plates 21 and 21 are bent inward to improve the rigidity of the side plates 21 and 21. Of the connecting rods 22, 22, 22, the connecting rods 22, 22 at both ends of the pallet drop prevention device 20 are arranged at positions that do not interfere with the columns 3 </ b> A, 3 </ b> C when fitted into the columns 3 </ b> A, 3 </ b> C. With this configuration of the pallet drop prevention device 20, the weight can be reduced as compared with the pallet drop prevention device 10. Workability can also be improved by weight reduction.

  As for other modified examples, as shown in FIG. 7, the pallet drop prevention device 30 includes a pair of side plates 31, 31 and a plurality of connecting plates 32, 32, 32 that connect them together. Of the connection plates 32, 32, 32, the connection plates 32, 32 at both ends of the pallet drop prevention device 30 are arranged at positions that do not interfere with the columns 3A, 3C when fitted into the columns 3A, 3C. With the configuration of the pallet drop prevention device 30, the weight can be further reduced as compared with the pallet drop prevention devices 10 and 20, and workability can be improved.

  The plate surfaces of the plurality of connecting plates 32, 32, 32 are in the same direction, but by setting any one plate surface of the connecting plates 32, 32, 32 to a direction orthogonal to the other plate surfaces, The rigidity of the pallet drop prevention device 30 can be improved.

  Next, 2nd-4th embodiment of the pallet fall prevention apparatus provided with the width adjustment part which adjusts the width | variety of the U-shaped part 17, and the length adjustment part which adjusts the length of the stopper part 11 is described. First, the dimensions of the pallet 2 and the dimensions of the columns 3A, 3B, 3C, 3D used in the three-dimensional warehouse will be described. The dimensions of the pallet 2 are determined in a plurality of dimensions according to the standard. In the three-dimensional warehouse, depending on the load placed on the pallet 2, for example, the pallet 2 in which the length in the left-right direction Y and the front-rear direction X is set to 900 mm × 900 mm, 1100 mm × 1100 mm, 1300 mm × 1300 mm is used. doing. Of course, there are pallets 2 of other dimensions.

  Moreover, the steel material of the square cross section generally marketed is used for the support | pillar 3A, 3B, 3C, 3D of a three-dimensional warehouse. The cross-sectional dimension of this steel material is determined according to the standard. For example, there are steel materials in increments of 25 mm such as 100 mm × 100 mm, 125 mm × 125 mm, and 150 mm × 150 mm. In the three-dimensional warehouse, the columns 3A, 3B, 3C, 3D constituting the rack 1 are selected based on the size of the pallet 2 to be used and the number of the racks 1. For this reason, it is necessary to prepare the pallet drop prevention apparatus 10 which can respond to the dimensions of the pallet 2 and the columns 3A, 3B, 3C, 3D to be used.

  The pallet drop prevention device 40 in the second embodiment includes a bolt tightening type width adjusting unit 41 and a length adjusting unit 42. The width adjusting unit 41 adjusts the width of the U-shaped portion 17 of the column fitting unit 12 according to the width of the column 3A. The length adjusting unit 42 adjusts the length of the stopper unit 11 in the front-rear direction X according to the distance between the support columns 3A and 3C.

  As shown in FIGS. 8 and 9, the pallet drop prevention device 40 is configured by connecting the same four units 40 </ b> A, 40 </ b> A, 40 </ b> A, 40 </ b> A to each other by bolts 43. Since each unit 40A, 40A, 40A, 40A has the same configuration, only one unit 40A will be described.

  As shown in FIG. 8, the unit 40 </ b> A includes a metal strip 44 and a metal right plate 45 provided at one end of the strip 44 and fixed at a right angle from the strip 44. . On the other end side of the strip-shaped plate material 44, a plurality of through holes 46 are provided at intervals of 100 mm along the longitudinal direction of the strip-shaped plate material 44. The right-angle plate member 45 is provided with a plurality of through holes 47 at intervals of 25 mm over the entire length.

  The width adjusting portion 41 is configured by a plurality of through holes 47 of the right-angle plate member 45 and bolts 43 inserted through the through holes 47. Further, the length adjusting portion 42 is configured by a plurality of through holes 46 of the belt-like plate material 44 and bolts 43 inserted through the through holes 46.

  Adjustment by the width adjusting unit 41 and the length adjusting unit 42 will be described. As shown in FIG. 9A, the right-angle plate members 45, 45 of the two units 40A, 40A are overlapped and slid as shown by the arrow F3 in the drawing, that is, between the strip-like plate members 44, 44, that is, Adjustment is made so that the U-shaped portion 17 has substantially the same width as the width of the column 3A. Next, as shown in FIG. 9B, bolts 43 are inserted into two through holes 47 among the plurality of through holes 47 of the right-angle plate member 45 and fastened with nuts 48.

  After assembling another set of units 40A and 40A assembled in this manner, the length of the pallet drop prevention device 40 in the front-rear direction X is obtained by stacking the strip-shaped plate materials 44 and sliding them as shown by the arrow F4 in the figure. Adjust. That is, the length of the stopper portion 11 is adjusted so that the length of the stopper portion 11 in the front-rear direction X corresponds to the length between the columns 3A and 3C. After the adjustment of the length, as shown in FIG. 9C, the bolt 43 is inserted into the through hole 46 of the belt-like plate material 44 and fastened with a nut 48. After adjusting the width of the U-shaped portion 17 of the column fitting portion 12 of the pallet drop prevention device 40 and the length of the stopper portion 11 in the front-rear direction X, the pallet drop prevention device 40 is attached to the rack 1.

  As described above, the width can be adjusted at intervals of 25 mm by the width adjusting unit 41 and the length can be adjusted at intervals of 100 mm by the length adjusting unit 42, so that there are a plurality of dimensions of the columns 3 </ b> A of the three-dimensional warehouse and dimensions of the pallet 2. However, all the dimensions can be accommodated by the unit 40A of the pallet drop prevention device 40. The unit 40A may be assembled first by adjusting the length of the strip-shaped plate material 44.

  A third embodiment is shown in FIG. The pallet drop prevention device 50 according to the third embodiment includes a concavo-convex fitting and fitting type width adjusting unit 51 and a length adjusting unit 52. As shown in FIG. 10, the pallet drop prevention device 50 is configured by the same four units 50 </ b> A, 50 </ b> A, 50 </ b> A, and 50 </ b> A, similarly to the pallet drop prevention device 40. Since these have the same configuration, only one unit 50A will be described below.

  The unit 50 </ b> A includes a metal strip plate 53 and a metal right plate 54 provided at one end of the strip plate 53 and fixed at a right angle from the strip plate 53. On the other end side of the strip-shaped plate material 53, a plurality of rectangular wave-shaped concave portions 55a and convex portions 55b are formed. The concave portions 55a and the convex portions 55b are alternately provided at intervals of 100 mm. Each recess 55a protrudes on one side (left side in the figure) of the strip-shaped plate material 53 by the thickness of the strip-shaped plate material 53. The concave portion 55a and the convex portion 55b are provided with a hole 55c into which a fixing pin (not shown) is inserted so that they are not detached after being combined with the other unit 50A.

  The rectangular plate 54 is also formed with a plurality of rectangular wave-shaped concave portions 56a and convex portions 56b. The concave portions 56a and the convex portions 56b are alternately provided at intervals of 25 mm. Each concave portion 56a protrudes on one side (front side in the figure) of the right-angle plate material 54 by the thickness of the right-angle plate material 54. The concave portion 56a and the convex portion 56b are also provided with a hole 56c for inserting a fixing pin (not shown).

  The width adjusting portion 51 is configured by a plurality of concave portions 56 a and convex portions 56 b of the right-angle plate material 54. Further, the length adjusting unit 52 is configured by a plurality of concave portions 56 a and convex portions 56 b of the strip-shaped plate material 53.

  The adjustment by the width adjusting unit 51 and the length adjusting unit 52 will be described. After adjusting the U-shaped portion 17 by the two units 50A so as to correspond to the width of the column 3A, the two units 50A are connected so that the plurality of concave portions 56a and the convex portions 56b of the right-angle plate member 54 fit each other. That is, the right-angle plate members 54 of the two units 50A are overlapped from above and below so that the convex portion 56b of one unit 50A fits into the concave portion 56a of the other unit 50A. After the right-angle plate material 54 is overlaid, a pin (not shown) is inserted into the hole 56c, and the overlaid right-angle plate material 54 is fixed. The plurality of concave portions 56a and convex portions 56b of the length adjusting portion 52 are similarly adjusted and fitted to each other.

  According to this fitting connection, each unit 50A, 50A, 50A, 50A can be firmly connected, and the rigidity of the pallet drop prevention device 50 can be improved.

  A fourth embodiment is shown in FIG. The pallet drop prevention device 60 in the fourth embodiment includes a slide-type bolt tightening type width adjustment unit 61 and a length adjustment unit 62. That is, the plurality of through holes 47 of the right-angle plate member 45 of the second embodiment and the plurality of through holes 46 of the strip-like plate member 44 are all connected to form a long hole.

  As shown in FIG. 11, the pallet drop prevention device 60 is also configured by the same four units 60A, 60A, 60A, 60A, like the pallet drop prevention device 40. Since these have the same configuration, only one unit 60A will be described below.

  A long hole 64 extending in the front-rear direction X is formed in the strip-shaped plate member 63, and a long hole 66 extending in the left-right direction Y is formed in the right-angle plate member 65.

  The width adjusting portion 61 is configured by a long hole 66 provided in the right-angle plate member 65 and a bolt (not shown) inserted through the long hole 66. The length adjusting unit 62 includes a long hole 64 provided in the belt-like plate member 63 and a bolt (not shown) inserted through the long hole 64.

  By this width adjusting unit 61 and length adjusting unit 62, it is possible to cope with the dimensions of the pallet 2 and the support column 3A in a stepless manner, and it is possible to correspond to the pallet 2 and the support column 3A of various sizes, thereby improving versatility. can do. Further, fine adjustment can be performed even if there is a dimensional error in the pallet 2 or the column 3A at the installation work site.

  A fifth embodiment is shown in FIG. The pallet drop prevention device 70 according to the fifth embodiment includes an insertion fitting type width adjusting unit 71 and a length adjusting unit 72. In the pallet drop prevention device 70, both units 73 and 74 are connected by inserting the unit 73 into the unit 74. By adjusting the amount of insertion, the width of the U-shaped portion 17 in the left-right direction Y and the length of the stopper portion 11 in the front-rear direction X are adjusted.

  As shown in FIG. 12, the pallet drop prevention device 70 includes four units 73, 73, 74, and 74. The units 73 and 73 have the same configuration, and the units 74 and 74 have the same configuration. Hereinafter, the units 73 and 74 will be described.

  Hereinafter, a specific configuration will be described. The unit 73 includes a belt-like plate member 75 having a tapered portion 75a having one end tapered, and a right-angle plate member 76 fixed at a right angle to the belt-like plate member 75 on the other end side of the belt-like plate member 75. The right-angle plate member 76 is formed in a shape that widens toward the opposite end from the fixed side. An insertion portion 76a having a C-shaped cross section is formed at the end portion of the right-angle plate member 76 that is widened toward the end.

  The unit 74 includes a strip-shaped plate member 77 having one end widened, and a right-angle plate member 78 fixed at a right angle to the strip-shaped plate member 77 on the other end side of the strip-shaped plate member 77.

  In the vicinity of the center portion of the belt-like plate member 77, a narrow portion 77a having a narrow vertical direction is formed. An insertion portion 77b having a C-shaped cross section is formed at the end of the belt-like plate member 77 from the narrow portion 77a toward the one end. A tapered portion 78 a having a tapered shape is formed at the tip of the right-angle plate member 78.

  The tapered portion 75a and the insertion portion 77b have substantially the same shape and can be closely engaged. Moreover, the taper part 78a and the insertion part 76a are also substantially the same shape, and can be closely engaged.

  The width adjusting portion 71 is configured by an insertion portion 76 a of the right-angle plate material 76 of the unit 73 and a tapered portion 78 a of the right-angle plate material 78 of the unit 74. The length adjusting unit 72 includes a taper portion 75 a of the band-like plate member 75 of the unit 73 and an insertion portion 77 b of the band-like plate member 77 of the unit 74.

  The adjustment by the width adjusting unit 71 and the length adjusting unit 72 will be described. First, in order to perform width adjustment by the width adjustment unit 71, the unit 73 and the unit 74 are coupled. Specifically, the taper portion of the right-angle plate member 78 of the unit 74 until the width of the U-shaped portion 17 constituted by the belt-like plate materials 75 and 77 and the right-angle plate materials 76 and 78 is substantially the same as the width of the support column 3A. 78 a is inserted into the insertion portion 76 a of the right-angle plate member 76 of the unit 73. The taper portion 78a and the insertion portion 76a have substantially the same shape, and the taper portion 78a and the insertion portion 76a are combined by being driven into the insertion portion 76a.

  Next, after assembling another set of the units 73 and 74, the length of the stopper unit 11 in the front-rear direction X between the coupling units 73 and 74 and the other coupling units 73 and 74 is between the columns 3A and 3C. The taper portion 75a of the strip-like plate member 75 of the unit 73 is inserted into the insertion portion 77b of the strip-like plate member 77 of the unit 74 until the position corresponding to the length. In this case as well, the taper portion 75a is struck into the insertion portion 77b to couple them together.

  Thus, depending on the configuration of the pallet drop prevention device 70, even if there are a plurality of dimensions of the three-dimensional warehouse support column 3 </ b> A and the pallet 2, the pallet drop prevention device 70 of the support unit 12 of the pallet drop prevention device 70 can be used. Since the length of the character part 17 and the stopper part 11 in the front-rear direction X can be adjusted, it is possible to correspond to the columns 3A and the pallet 2 having various dimensions. The units 73 and 74 may be assembled first by combining the taper portion 75a of the strip-shaped plate member 75 and the insertion portion 77b of the strip-shaped plate member 77.

  Next, a sixth embodiment in which an anti-slip portion is provided on the outer side surfaces (stopper surfaces) of the side plates 13 and 14 of the pallet drop prevention device 10 will be described. The anti-slip portion increases the frictional resistance of the outer surfaces of the side plates 13 and 14 and suppresses the pallet 2 from slipping when the pallet 2 comes into contact with the outer surfaces of the side plates 13 and 14.

  As shown in FIG. 13, a diamond-shaped or turtle-shaped mesh-shaped metal net 80 (so-called expanded metal) is attached to the outer side surfaces of the side plates 13 and 14 of the pallet drop prevention device 10. In addition, when the rigidity of the metal net 80 is high, the metal net 80 itself may be used as the side plates 13 and 14 of the pallet drop prevention device 10. Further, a rubber plate may be attached to the side plates 13 and 14 to form a non-slip portion, or a fine uneven portion may be formed on the side plates 13 and 14 to form a surface shape with high frictional resistance.

  Furthermore, as shown in FIG. 14, an uneven plate 81 protruding toward the pallet 2 may be provided on the outer surface of the side plates 13 and 14. The depth of the recess is preferably set to a depth at which the corner of the pallet 2 is engaged with the recess. Alternatively, the side plates 13 and 14 may be formed in an uneven shape.

  The pallet 2 may be made of wood or resin, and the anti-slip portion may be selected depending on the material of the pallet 2. For example, when the pallet 2 is made of wood, a rubber plate is used as a non-slip portion, and when it is made of resin, a metal net 80 is used.

  By providing the side plates 13 and 14 with anti-slip portions, the pallet 2 is prevented from slipping when the pallet 2 moves and contacts the side plates 13 and 14 due to an earthquake or the like. As a result, the movement of the pallet 2 can be suppressed, and the fall of the pallet 2 from the rack 1 can be prevented. The anti-slip portion can be applied to the first to fifth embodiments described above.

  1 rack, 2 pallets, 3A, 3B, 3C, 3D support, 4A, 4B pallet support material, 10, 20, 30, 40, 50, 60, 70 Pallet drop prevention device, 11 stopper, 12 support fitting, 13, 14 Side plate, 15 Connecting plate, 17 U-shaped portion, 41, 51, 61, 71 Width adjusting portion, 42, 52, 62, 72 Length adjusting portion, 80 Metal net, 81 Concavity and convexity plate.

Claims (4)

A plurality of struts erected at predetermined intervals in the loading / unloading direction of the pallet on which the load is placed and the orthogonal direction orthogonal to the direction, and the respective supporting columns adjacent in the loading / unloading direction are respectively fixed and extend in the orthogonal direction. A pallet drop prevention device that is used in a three-dimensional warehouse equipped with a pallet support material that supports the pallet and that can be retrofitted to restrict the movement of the pallet in the orthogonal direction,
A stopper portion that has a pair of stopper surfaces that extend between the struts adjacent in the loading / unloading direction and are adjacent to the opposing side surfaces of the pallets adjacent in the orthogonal direction;
The U-shaped portion that is integrally provided at both ends of the stopper portion in the loading / unloading direction, is fitted into each column that is adjacent in the loading / unloading direction, and is placed on the pallet support material fixed to the column. A strut fitting portion having
A pallet drop prevention device for a three-dimensional warehouse characterized by comprising:   The pallet drop prevention device for a three-dimensional warehouse according to claim 1, further comprising: a width adjusting unit capable of adjusting the width of the U-shaped portion of the column fitting unit according to the width of the column.   The pallet drop prevention device for a three-dimensional warehouse according to claim 1 or 2, further comprising a length adjusting unit capable of adjusting a length of the stopper portion in the loading / unloading direction according to a distance between the columns.   The anti-slip part which stops the slip of the said pallet when the said pallet contacts the said stopper surface is provided in the said stopper surface of the said stopper part, The any one of Claims 1-3 characterized by the above-mentioned. The three-dimensional warehouse pallet drop prevention device as described in 1.

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