JP7496145B2 - Movable Shelf Device - Google Patents

Description

The present invention relates to a movable shelf device that stores articles and is movable from a storage position to a loading/unloading position so that the stored articles can be taken in and out.

For example, a movable shelf device has been proposed in Patent Document 1. This movable shelf device is configured with multiple movable shelves arranged side by side so that they can be moved in the short direction of the movable shelves. Specifically, a pair of guide rails that run along the movement direction of the movable shelves are laid on the floor surface at a predetermined interval in a direction perpendicular to the movement direction, and a pair of running wheels at the bottom end of each movable shelf are movably placed on these guide rails.

In Patent Document 1, when taking in or out an item, one of the movable shelves, the relevant one and the adjacent one in the movement direction, is separated from the other to form a passageway through which the item can be taken in or out. When a loading vehicle such as a forklift enters this passageway to take in or out an item from the movable shelf, the guide rails get in the way, making it difficult to take in or out the item.

Therefore, Patent Document 2 (see Figure 6) proposes a movable shelf device that has no guide rails on the floor surface. The movable shelf device in Patent Document 2 has an upper rail with an I-shaped cross section fixed to the ceiling, and a pair of guide wheels attached to two supports attached to the upper end of the movable shelf are placed on the upper surfaces of both lower sides of the upper rail. Therefore, the traveling wheels attached to the lower end of the movable shelf are driven and rotated by a traveling motor, and the pair of guide wheels move along the upper surfaces of both lower sides of the upper rail, allowing the movable shelf to move along the upper rail.

In Patent Document 2, the installation work of lifting the heavy upper rail in an unstable position using a stepladder and fixing it to the ceiling was extremely difficult to do, and there was room for improvement.

Japanese Utility Model Publication No. 4-18417 JP 2000-152833 A

In view of the above, an object of the present invention is to provide a movable shelf device that allows easy loading and unloading of articles while also allowing easy installation work.

The movable shelf device of the present invention is characterized in that a plurality of movable shelves are arranged on a floor, each of which is equipped with a shelf capable of storing items and long in the direction of movement, and a travel unit for reciprocating the shelf between a storage position and a loading/unloading position where the stored items are loaded and unloaded in a width direction perpendicular to the direction of movement of the shelf, the floor is provided with a plurality of rotatable rotating parts corresponding to each movable shelf, each movable shelf is provided with abutment parts for abutting against the plurality of rotating parts to guide the movable shelf along the direction of movement, and the plurality of rotating parts are located below each shelf when the shelf is in its storage position.

According to this configuration, when loading or unloading an item from a shelf, the shelf is moved from the storage position to the loading/unloading position by the traveling unit. After the movement, a loading vehicle such as a forklift is moved to the shelf located at the loading/unloading position. At this time, since multiple rotating units are located below the other shelves located at the storage position, there are no rotating units on the floor surface on both sides perpendicular to the movement direction of the shelf located at the loading/unloading position. Therefore, the loading vehicle can be moved smoothly to the shelf located at the loading/unloading position, and items can be easily loaded and unloaded from the width direction perpendicular to the movement direction of the shelf. Moreover, since it is only necessary to provide multiple rotating units on the floor for the number of movable shelves, the installation work of the movable shelf device can be easily performed.

In addition, the movable shelf device according to the present invention may be configured such that each of the multiple rotating parts is composed of a roller that can rotate around an axis in the vertical direction, and the multiple rollers are attached to a fixed member installed on the floor at intervals along the movement direction.

As described above, multiple rollers are attached to the fixed member, so multiple rollers can be quickly installed on the floor simply by placing the fixed member on the floor.

In addition, the movable shelf device according to the present invention may have a pair of members in which the abutting portion extends in the moving direction and abuts from both sides in the width direction.

As described above, the pair of members extend in the movement direction and abut on both sides of the width direction perpendicular to the movement direction of the movable shelf, thereby reliably regulating the movement direction of the movable shelf.

In addition, the mobile shelf device according to the present invention may be configured such that the traveling unit includes a drive device and a plurality of traveling wheels, at least one of which is rotationally driven by the drive device, and the plurality of traveling wheels may include a solid tire portion formed of synthetic resin.

As described above, by providing multiple running wheels with solid tire portions made of synthetic resin, it is possible to prevent the movable shelf from tilting due to air leakage from some of the pneumatic tires when the movable shelf is configured with multiple pneumatic tires.

According to the present invention, by providing a plurality of rotating parts that guide the movable shelf on the floor so as to be positioned below the movable shelf when the movable shelf is in its storage position, it is possible to provide a movable shelf device that allows items to be easily loaded and unloaded while also making installation work easy.

FIG. 2 is a front view of the movable shelf device of the present invention. FIG. FIG. 3 is an enlarged view of the area enclosed by III in FIG. 2 . FIG. FIG. 11 is a side view showing a method of installing the movable shelf device. 5A and 5B are explanatory diagrams showing a procedure for attaching the guide unit to a floor. FIG. 2 is a perspective view of the guide unit attached to the floor. FIG. 13 is a perspective view showing a state in which the traveling unit is disposed on the guide unit. FIG. 11 is a front view showing the state immediately before the shelf is placed on the traveling unit. FIG. 11 is a side view of another type of traveling unit equipped with a cleaning tool. FIG. 11 is a front view of the propulsion unit of FIG. 10 . 5A, 5B, 5C, and 5D are explanatory diagrams seen from the front showing the procedure for replacing the tire portion. 5A, 5B, 5C, and 5D are explanatory side views showing the procedure for replacing the tire portion. 14(a) and 14(b) show another embodiment of the movable shelf device, in which FIG. 14(a) is a side view of the lower end portion, and FIG. 14(b) is a cross-sectional view taken along the line XIV-XIV in FIG. 14(a). 11A and 11B show another embodiment of the guide unit, in which FIG.

The movable shelf device according to one embodiment of the present invention will be described below with reference to the drawings. The movable shelf device 1 shown in Figs. 1 and 2 comprises a plurality of movable shelves 2 (three in Fig. 2, but any number greater than two will do) arranged in a warehouse, for example, and a guide unit 3 that guides the movable shelves 2 to move linearly. In the following description, the direction of movement of the movable shelves 2 is defined as the front-rear direction, and the direction perpendicular to the direction of movement of the movable shelves 2 is defined as the left-right direction (or width direction).

Each movable shelf 2 is rectangular in plan view, movable in its longitudinal direction, and multiple movable shelves (three in this embodiment (see FIG. 2)) are arranged side by side at short intervals in the transverse direction. Each movable shelf 2 is equipped with a shelf 5 that can store a box 4 (only shown in FIG. 1) containing an item and is long in the direction of movement, and a traveling unit 6 that places the shelf 5 and moves it back and forth between a storage position and an entry/exit position. The storage position of the movable shelf 2 is the position shown by the solid line in FIG. 1. The entry/exit position of the movable shelf 2 is shown, for example, as a position moved to the right as shown by the two-dot chain line in FIG. 1, but it may be a position moved further to the right from the position in FIG. 1. In short, the entry/exit position of the movable shelf 2 may be set at any position as long as the items stored in the movable shelf 2 can be entered and taken out. In FIG. 1, the movable shelf 2 that is to be entered and taken out, which is located at the back of the movable shelf 2 located in front as shown by the solid line, is moved to the entry/exit position shown by the two-dot chain line in FIG. 1. The movable shelf 2 may also be configured to be movable not only to the right side but also to the left side (both left and right).

The goods are stored in boxes 4 shown in FIG. 1, and the boxes 4 are placed on pallets 7 placed on each shelf 5. Therefore, as described above, the mobile shelf 2 at the rear side of the warehouse to be loaded and unloaded is moved to the loading/unloading position shown by the two-dot chain line in FIG. 1, and the boxes 4 stored on the mobile shelf 2 are lifted and removed together with the pallet 7 from the left and right direction, that is, from the front to the rear in FIG. 1, using a loading vehicle such as a forklift (not shown). The loading and unloading of the boxes 4 on each shelf 5 can be performed manually using a loading vehicle such as a forklift as described above, or automatically using a robot or the like, or directly by a person without using a loading vehicle. In addition, the location of the loaded box 4 on which shelf 5 it is stored is stored in the memory unit of the operation panel (not shown), and the storage location of the box 4 to be unloaded can be confirmed by displaying the information stored in the memory unit on the display unit of the operation panel.

As shown in FIG. 4, the shelf 5 includes six frame members 51 that are generally C-shaped in plan view and extend in the vertical direction, a plurality of first connecting members 52 (21 in FIG. 4) with a rectangular cross section that connect the frame members 51, 51 that face each other in the left-right direction, a plurality of second connecting members 53 (24 in FIG. 4) with a rectangular cross section that connect the frame members 51, 51 that face each other in the front-rear direction, a plurality of plate-shaped reinforcing members 54 (18 in FIG. 4) that diagonally connect and reinforce the frame members 51, 51 that face each other in the left-right direction, and an upper end connecting member 55 with a rectangular cross section that connects the upper ends of the three frame members 51, 51, 51 at one left-right end side.

As shown in FIG. 8, the traveling unit 6 includes a drive device 61 and a plurality of traveling wheels 62, 63, 64 (see FIG. 1). The plurality of traveling wheels 62, 63, 64 include a pair of first traveling wheels 62, 62 on the left and right located at the front end of the shelf 5 in the front-rear direction, a pair of second traveling wheels 63, 63 on the left and right located at the rear end of the shelf 5 in the front-rear direction, and a pair of third traveling wheels 64, 64 on the left and right located in the middle of the shelf 5 in the front-rear direction. One of the pair of left and right traveling wheels 64, 64 located in the middle of the shelf 5 in the front-rear direction is rotationally driven by the drive device 61.

5 and 8, the drive unit 61 includes an electric motor 61A as a drive source, a first sprocket 61C attached to the output shaft 61b (see FIG. 5) from a reduction gear case 61B connected to the electric motor 61A so as to be rotatable together with the output shaft 61b, a second sprocket 61D (see FIG. 5) attached to the axle of the one of the running wheels 64 so as to be rotatable together with the output shaft 61b, and a transmission chain (not shown) wound around the first sprocket 61C and the second sprocket 61D. Therefore, the electric motor 61A is driven in the forward or reverse direction, and the shelf 5 can be moved forward or backward by rotating the one of the running wheels 64 forward or backward. In addition, a clutch (not shown) that switches between a transmission state in which the driving force from the electric motor 61A is transmitted to the output shaft 61b and a cut-off state in which the driving force is not transmitted may be provided in the reduction gear case 61B, so that the transmission state is maintained when electricity is applied and the transmission state is switched to the cut-off state when a power failure occurs. With this configuration, the shelf 5 can be moved manually during a power failure.

8 and 11, each of the first running wheels 62 is covered with a downwardly open first box body 65 and rotatably attached to an axle 65a that is supported by the left and right plate portions 65A, 65A that constitute the first box body 65. Each of the second running wheels 63 is covered with a downwardly open second box body 66 and rotatably attached to an axle 66a that is supported by the left and right plate portions 66A, 66A that constitute the second box body 66. Each of the third running wheels 64 is covered with a downwardly open third box body 67 and rotatably attached to an axle 67a that is supported by the left and right plate portions 67A, 67A that constitute the third box body 67. Each of the first running wheels 62, each of the second running wheels 63, and each of the third running wheels 64 is composed of a solid tire portion formed of a synthetic resin (e.g., polyurethane). In this way, by configuring the movable shelf 2 from a solid tire portion made of synthetic resin, it is possible to prevent the movable shelf 2 from tilting due to air leakage from some of the pneumatic tires when multiple pneumatic tires are used. In addition, grooves may be formed on the surfaces of each of the first running wheels 62, each of the second running wheels 63, and each of the third running wheels 64 to improve straight-line stability and grip during running. In addition, each of the first running wheels 62, each of the second running wheels 63, and each of the third running wheels 64 may be formed, for example, by the same manufacturing method as that for the printing resin roller.

As shown in FIG. 8, the first box body 65, 65, the second box body 66, 66, and the third box body 67, 67 are connected in the left-right direction by plate-like bodies 68, 69, 70 that are long in the left-right direction. The plate-like body 70 located in the middle of the front-rear direction among these plate-like bodies 68, 69, 70 is composed of a pair of front and rear plate-like bodies 70A, 70B, and the reduction gear case 61B is placed and fixed on these plate-like bodies 70A, 70B. In addition, the plate-like bodies 68, 69, 70 are connected by a pair of left and right, approximately inverted L-shaped members 71, 71 that extend in the front-rear direction to connect the plate-like bodies 68, 69, 70 in the front-rear direction. These members 71, 71 form abutment parts for abutting against a plurality of rotating parts 31 described later from both sides in the left-right direction (width direction) to guide the movement of each movable shelf 2 along the movement direction. As shown in FIG. 10, each member 71 includes a horizontal plate portion 71A that is screwed in contact with the underside of the plate-like bodies 68, 69, and 70, and a vertical plate portion 71B that is bent 90 degrees from the inner end of the horizontal plate portion 71A in the left-right direction and faces downward, and the inner surface 71b of the vertical plate portion 71B abuts against a plurality of rotating parts 31 described later to guide each movable shelf 2 along the moving direction. In FIG. 8, plates 15 are further provided between the plate-like body 68 located at the front end of the members 71 and 71 and the plate-like body 70 located at the middle part, and between the plate-like body 70 located at the middle part and the plate-like body 69 located at the rear end, for connecting and reinforcing the members 71 and 71 with screws.

As shown in FIG. 7, the guide unit 3 has a plurality of rotatable rotating parts 31 (five in FIG. 7) provided on the floor 8 in correspondence with each movable shelf 2. These rotating parts 31 are composed of rollers attached to a rectangular plate-shaped fixed member 32 that is long in the moving direction (front-back direction) installed on the floor 8. Each roller is configured to be rotatable around an axis X in the vertical direction, and is attached to the fixed member 32 at regular intervals along the moving direction of the movable shelf 2. The guide unit 3 is located below each shelf 5 in a plan view at the storage position of each shelf 5. In other words, the guide unit 3 is arranged so that it does not protrude from each shelf 5 in a plan view at the storage position of each shelf 5. Furthermore, the guide unit 3 is also located below each shelf 5 in a plan view at the loading/unloading position of each shelf 5. In other words, the guide unit 3 is arranged so that it does not come off each shelf 5 and is not exposed to the floor 8. For this reason, the guide unit 3 does not interfere with the running of the loading/unloading vehicle. In addition, by fixing (attaching) the fixing member 32 with a bolt protruding from the floor, when the rotating part 31 needs to be replaced, the entire rotating part 31 can be easily replaced with a new fixing member simply by removing the fixing member 32.

Since the movable shelf 2 is long in the moving direction, it is equipped with a tipping prevention mechanism H that prevents the movable shelf 2 from tipping over during movement. As shown in the enlarged views of Figures 2 and 3, this tipping prevention mechanism H is configured by providing engagement structures at multiple locations (two locations in Figure 2) in the vertical direction that engage the sides of the movable shelves 2, 2 so that adjacent movable shelves 2, 2 can be moved in the left-right direction. Specifically, as shown in Figure 3, each engagement structure includes a rail 9 that is approximately C-shaped when viewed from the front to back and is attached to the opposing side of one of the adjacent movable shelves 2, 2 so that its open end faces the other movable shelf 2, and a pair of upper and lower rotating bodies 11, 11 that are attached by a bolt B to the tip of an extension member 10 that is attached to the other movable shelf 2 and extends toward the one movable shelf 2 and enter the rail 9. The front-to-rear length of the rail 9 is set according to the moving length of the movable shelf 2. For example, if the left movable shelf 2 in FIG. 3 is about to tip over to the left while moving, the rotating bodies 11, 11 will abut against one of the left and right inner surfaces 9A, 9B (see FIG. 3) of the rail 9, preventing the left movable shelf 2 from tipping over. Even if the left movable shelf 2 tilts during its movement and the rotating bodies 11, 11 abut against the left inner surface 9A, 9A of the rail 9, the rotating bodies 11, 11 will rotate and will not exert a large resistance to movement on the left movable shelf 2.

Next, a method for installing the movable shelf device 1 will be described. The method for installing the movable shelf device 1 includes a rotating part installation process for installing a plurality of rotatable rotating parts 31 on the floor 8 corresponding to each movable shelf 2, a traveling unit arrangement process for arranging a traveling unit 6 having an abutment part 71 for abutting against the plurality of rotating parts 31 to guide the movement along the moving direction, and a shelf installation process for placing and supporting a shelf 5 on the traveling unit 6.

The rotating part installation process is a process of installing multiple rotating parts 31 on the floor 8 so that they are located below the movable shelf 2 in a plan view at the storage position of the movable shelf 2. In detail, multiple (five) rotating parts (rollers) 31 are rotatably attached to five shafts 33 (see FIG. 10) spaced apart in the longitudinal direction of a fixed member 32 that is long in the front-rear direction, and as shown in FIG. 6 (a) and (b), the fixed member 32 to which the multiple rotating parts 31 are attached is fixed to the floor 8 by multiple (six) anchor bolts 12. In this way, multiple rotating parts (rollers) 31 can be quickly installed on the floor 8 simply by installing the fixed member 32 on the floor 8. The longitudinal length of the fixed member 32 is shorter than the longitudinal length of the movable shelf 2. In this embodiment, the longitudinal length of the fixed member 32 is about half the longitudinal length of the movable shelf 2, but may be any length as long as it does not protrude from the shelf 5. The rotating part (roller) 31 is simply fitted onto the shaft 33 that supports it so that it can rotate freely, so it can be easily pulled out upwards using a pulley removal tool. In addition, the left and right width of the fixed member 32 in the left and right direction is made narrower than the left and right width of the rotating part (roller) 31 in the left and right direction so that the abutment parts 71, 71 do not abut against the left and right ends of the fixed member 32.

As shown in Figure 5, the running unit placement process is a process in which the running unit 6 is lowered from above and placed on the floor surface so that the multiple rotating parts 31 attached to the fixed member 32 are positioned between a pair of left and right members (contact parts) 71, 71 of the running unit 6. Figure 8 shows the state in which the running unit 6 has been placed on the guide unit 3.

As shown in Figures 5 and 9, the shelf installation process involves placing the lower ends of the six frame members 51 of the shelf 5 on the six mounting members 13 fixed to the upper ends of the boxes 65, 66, and 67 of the traveling unit 6, and then removably connecting the lower ends 51A of the frame members 51 to the mounting members 13 with screws (connecting members) 14 while the shelf 5 and traveling unit 6 are in this mounted state. In this way, the shelf 5 and traveling unit 6 are configured to be removably connected with the screws 14. Not only is it advantageous in terms of maintenance to be able to remove the shelf 5 and traveling unit 6, but if either the shelf 5 or the traveling unit 6 is damaged, the mobile shelf 2 can be configured by simply preparing the damaged shelf 5 or traveling unit 6.

As shown in Figs. 10 and 11, the movable shelf 2 has a cleaning tool 16 at the front and rear of the traveling wheels 62, 63, 64 for sweeping out foreign objects such as dust on the movement path of the traveling wheels 62, 63, 64. The cleaning tool 16 is composed of a brush or scraper. The cleaning tool 16 is fixed with screws to the front plate parts 65B, 66B, 67B and the rear plate parts 65C, 66C, 67C of the box bodies 65, 66, 67 that cover the traveling wheels 62, 63, 64. Therefore, when the shelf 5 moves back and forth, the cleaning tool 16 sweeps out foreign objects such as dust on the movement path of the traveling wheels 62, 63, 64, so that the traveling wheels 62, 63, 64 do not come into contact with or ride up against foreign objects and damage the traveling wheels 62, 63, 64, and the life of the traveling wheels 62, 63, 64 can be prevented from being reduced.

The mounting members 13, 13, 13 fixed to the upper surface of the box bodies 65, 66, 67 that cover the running wheels 62, 63, 64 of the movable shelf 2 are provided with an upwardly open U-shaped lower member 17 fixed to the upper surface of the box bodies 65, 66, 67, a downwardly open U-shaped upper member 18 having front and rear plate portions 18A, 18B that overlap the front and rear plate portions 17A, 17B of the lower member 17 in the front-rear direction and are connected by a pair of left and right screws 20, 20, as shown in Figures 10 and 11.

The height adjustment means 19 includes a first screw shaft 19A in an up-down position fixed to the underside of the top plate portion 18C of the upper member 18, a second screw shaft 19B in an up-down position fixed to the upper surface of the bottom plate portion 17C of the lower member 17 and formed with a reverse screw to the first screw shaft 19A, and a vertically elongated nut 19C whose upper portion is screwed onto the first screw shaft 19A and whose lower portion is screwed onto the second screw shaft 19B. Therefore, by rotating the nut 19C in one direction, the position of the upper member 18 is raised, and by rotating the nut 19C in the other direction, the position of the upper member 18 is lowered. Therefore, by adjusting the up-down position of the upper member 18 with the height adjustment means 19, the height of the shelf 5 in the left-right direction or the front-back direction can be made uniform. The front and rear plate portions 18A, 18B of the upper member 18 are provided with a pair of left and right through-holes 18a, 18b (see FIG. 10) through which the screws 20, 20 can be inserted, and the front and rear plate portions 17A, 17B of the lower member 17 are provided with a pair of left and right screw holes 17a, 17b (see FIG. 11) into which the tip of the screw 20 inserted through the through-holes 18a, 18b is screwed. The through-holes 18a, 18b are formed as elongated holes that are long in the vertical direction to allow the inserted screw 20 to escape before being tightened when the position of the upper member 18 is changed to adjust the height. After the height adjustment, the screws 20, 20 are tightened to connect the front and rear plate portions 18A, 18B of the upper member 18 to the front and rear plate portions 17A, 17B of the lower member 17.

For example, when a specific running wheel (tire portion) 62 needs to be replaced due to wear or the like, the running wheel 62 can be replaced. The procedure for replacing the running wheel 62 will be described below. The front and rear plate portions 65B, 65C of the box body 65 covering the running wheel 62 are loosened and removed by loosening a number of screws 21 (in FIG. 8, the screws 21 of the front plate portion 65B are shown, and the screws of the rear plate portion 65C are not shown) (FIGS. 12(a) and 13(a) show the left running wheel 62 with the plate portions 65B, 65C removed). Next, as shown in FIG. 12(b) and FIG. 13(b), a plate-like body 22 long in the front-rear direction is inserted from the front-rear direction into the space formed by the top plate portion 65D of the box body 65, the left and right plate portions 65A, 65A, and the upper surface 62A of the running wheel 62, and the front and rear ends of the plate-like body 22 are jacked up using jacks 23 to lift the running wheel 62 off the floor 8. Next, the multiple screws 24 are loosened to remove the plate portion 65A on the outer left-right direction (see Figures 12(c) and 13(c)). Then, as shown in Figures 12(d) and 13(d), the running wheel 62 is removed from the shaft 65a. After this, a new running wheel 62 is attached to the shaft 65a, and the multiple screws 24 are tightened to attach the plate portion 65A on the outer left-right direction. Next, the jacks 23, 23 are loosened to remove the plate-shaped body 22, completing the replacement of the running wheel 62. The other running wheels 63, 64 can also be replaced in the same way.

As shown in Figures 14(a) and 14(b), the movable shelf device 1 is also provided with a positioning mechanism 25 for preventing the movable shelf 2 from moving in the forward/backward, left/right, and up/down directions at the loading/unloading position of the movable shelf 2.

The positioning mechanism 25 is provided at the front end of the movable shelf 2 and comprises a metal protruding member 26 fixed to protrude forward from the front end of the lower part of the movable shelf 2, and a metal engaged member 27 installed at the loading/unloading position of the movable shelf 2 so as to engage with the protruding member 26 in the front-rear direction.

The protruding member 26 is screwed to the bracket 28 fixed to the left-right center of the plate-like body 68, which is a member connecting the front running wheels 62, 62, and is configured in a generally conical shape tapering toward the tip, and is configured as a rod-like body with a front end surface 26A having a flat surface along the vertical direction. The engaged member 27 is attached to the upper part of the rear end surface of the fixed member 29 erected on the floor 8, and is configured as a receiving member in which a mortar-shaped recess 27A is formed with a diameter that increases toward the front side where the protruding member 26 enters. The center of the back side of this recess 27A is provided with a cushioning material 27B made of an elastic material against which the front end surface 26A of the protruding member 26 that enters the recess 27A abuts.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

In the above embodiment, the multiple rotating parts 31 are arranged in a row, but as shown in Figures 15(a) and (b), the multiple rotating parts 31 may be arranged in a staggered pattern in the movement direction of the movable shelf 2. By arranging them in this manner, the left rotating part 31 abuts against the left member 71 and the right rotating part 31 abuts against the right member 71, it is difficult for gaps to occur between the left and right members (abutment parts) 71, 71 and the multiple rotating parts 31, thereby improving the linearity of the movable shelf 2.

In addition, in the above embodiment, the fixed member 32 to which the multiple rotating parts 31 are attached is installed on the floor 8, but the multiple rotating parts 31 may be installed directly on the floor.

In addition, in the above embodiment, the abutment portion is composed of a pair of members 71, 71, but it may also be composed of, for example, a member having a generally gate-like shape with an open lower portion.

1... movable shelf device, 2... movable shelf, 3... guide unit, 4... box, 5... shelf, 6... running unit, 7... pallet, 8... floor, 9... rail, 9A, 9B... inner surface, 10... extension member, 11... rotating body, 12... anchor bolt, 13... mounting member, 14... screw (connecting member), 15... plate, 16... cleaning tool, 17... lower member, 17A, 17B... front and rear plate portions, 17C... bottom plate portion, 17a, 17b... screw holes, 18...upper member, 18A, 18B...front and rear plate portions, 18C...top plate portion, 18a, 18b...through holes, 19...height adjustment means, 19C...nut, 20, 21...screw, 22...plate-shaped body, 23...jack, 24...screw, 25...positioning mechanism, 26...protruding member, 26A...front end surface, 27...engaged member (receiving member), 27A...recess, 27B...cushion material, 28...bracket, 29...fixed member, 31...rotating portion (cone B), 32...fixing member, 33...shaft, 51...frame member, 51A...lower end, 52...first connecting member, 53...second connecting member, 54...reinforcing member, 55...upper end connecting member, 61...driving device, 61A...electric motor, 61B...reduction gear case, 61C...first sprocket, 61D...second sprocket, 61b...output shaft, 62, 63, 64...running wheel (tire portion), 62A...upper surface, 65...first box body, 66... Second box body, 67...third box body, 65A, 66A, 67A...left and right plate parts, 65a, 66a, 67a...axis, 65B, 66B, 67B...front plate part, 65C, 66C, 67C...rear plate part, 65D...top plate part, 68, 69, 70...plate-shaped body, 70A, 70B...plate-shaped body, 71...member (contact part), 71A...horizontal plate part, 71B...vertical plate part, 71b...inner surface, B...bolt, H...anti-tip mechanism, X...axis center

Claims (5)

A plurality of movable shelves are arranged on a floor, the movable shelves each having a shelf capable of storing an article and elongated in a moving direction, and a traveling unit for reciprocating the shelf between a storage position and a loading/unloading position for loading/unloading the stored article in a width direction perpendicular to the moving direction of the shelf;
A plurality of rotatable rotating parts are provided on the floor corresponding to each movable shelf,
Each of the movable shelves is provided with an abutment portion for abutting against the plurality of rotating portions to guide the movable shelves along the moving direction,
the plurality of rotating parts are located below each of the shelves when the shelves are in a storage position ;
A movable shelf device characterized in that each of the multiple rotating parts is composed of a roller that can rotate around an axis in the vertical direction, and the multiple rollers are attached at intervals along the movement direction to a fixed member installed on the floor . The movable shelf device described in claim 1, characterized in that the abutment portion has a pair of members extending in the movement direction and abutting from both sides in the width direction, and the width direction size of the fixed member is smaller than the width direction size of the roller . a positioning mechanism for preventing the movable shelf from moving in the moving direction and the width direction at a front entry/outlet position of the movable shelf,
3. The movable shelf device according to claim 1, wherein the positioning mechanism comprises a protruding member provided on the movable shelf and an engaged member provided at a front entry/retrieval position of the movable shelf so as to engage with the protruding member in the movement direction . The traveling unit includes a drive device and a plurality of traveling wheels, at least one of which is rotationally driven by the drive device;
The movable shelf device according to any one of claims 1 to 3 , further comprising a cleaning tool for sweeping away foreign matter on the movement path of the traveling wheels . the drive device includes an electric motor, a reduction gear case connected to the electric motor, and a clutch provided in the reduction gear case and configured to switch between a transmission state in which a driving force from the electric motor is transmitted to an output shaft of the reduction gear case and a cut-off state in which a driving force is not transmitted,
5. The movable shelf apparatus according to claim 4, wherein the clutch is configured to maintain the transmission state when power is applied, and to switch from the transmission state to the disconnection state when a power failure occurs.