Assembly rack

Abstract

This assembly rack comprises: a support member that has a first side surface having a plurality of recesses provided at fixed intervals in an axial direction thereof, and a second side surface adjacent to the first side surface; and a beam member having a first portion with a projection and facing the first side surface, and a second portion provided adjacent to the first portion and facing the second side surface. Each of the plurality of recesses extends in a normal direction of the second side surface. The beam member is movable between a first position where the second portion faces the second side surface in a state of being spaced apart from the support member, and a second position where the beam member has been moved in the normal direction of the second side surface from the first position and is fixed to the support member by inserting the projection into any of the plurality of recesses.

Description

Assembled shelves

[0001] The present invention relates to an assembly shelf that can be disassembled and assembled.

[0002] For example, a known assembly shelf is disclosed in Patent Document 1. This assembly shelf includes a column member and a beam member attached to the column member. In this assembly shelf, a pair of protrusions is provided on the column member. The protrusions have a pair of protrusions and a pair of inclined surfaces formed on the inner surfaces of the pair of protrusions. The pair of inclined surfaces can position the beam member relative to the column member in both the longitudinal direction of the shelf and the lateral direction intersecting the longitudinal direction of the shelf.

[0003] European Patent Application Publication No. 0686817A2

[0004] In this assembly shelf, the pair of protrusions perform both the function of positioning the girder members in the longitudinal direction and the function of positioning the girder members in the lateral direction, so the pair of protrusions must have a certain degree of strength. Therefore, the pair of protrusions must be formed to a certain size. However, forming the pair of protrusions to a certain size reduces the degree of freedom in adjusting the installation height of the girder members, and the installation height of the girder members can only be adjusted in relatively large increments. Furthermore, forming the pair of protrusions to a certain size causes the girder members and the pair of protrusions to collide when changing the installation height of the girder members, making it difficult to change the installation height of the girder members.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an assembly shelf in which the installation height of the beam members can be adjusted in finer increments and the installation height of the beam members can be changed extremely easily.

[0006] The above-mentioned problems are solved by the present invention as follows: That is, an assembly shelf of the present invention (1) comprises: a support member having a first side surface with a plurality of recesses provided at regular intervals in the axial direction of the support member and a second side surface adjacent to the first side surface, and a beam member having a first portion having a convex portion facing the first side surface, and a second portion provided adjacent to the first portion and facing the second side surface, each of the plurality of recesses extending in a normal direction of the second side surface, and the beam member is movable between a first position where the second portion faces the second side surface while separated from the support member, and a second position where the beam member is moved from the first position in the normal direction of the second side surface and fixed to the support member with the convex portion inserted into one of the plurality of recesses.

[0007] Furthermore, the assembly shelf of the present invention (2) is the assembly shelf described in (1), wherein the first side has a plurality of second recesses, each of which extends downward from the innermost portion of the recess, and the convex portion is capable of dropping into the second recess at the second position, and accordingly, the beam member is capable of moving from the second position to a third position lower than the second position.

[0008] Furthermore, the assembly shelf of the present invention (3) is the assembly shelf described in (2), wherein the support member includes a rail that protrudes from the second side surface and extends in the axial direction, and the second portion has a saddle-shaped saddle portion that extends in the axial direction and can straddle the rail, and the saddle portion is slidable along the rail when the beam member moves between the second position and the third position.

[0009] Furthermore, the assembly shelf of the present invention (4) is the assembly shelf described in (3), wherein the first side has a protrusion at a position surrounded by the recess and the second recess, and when the beam member is in the third position, the protrusion that has fallen into the second recess engages with the protrusion.

[0010] The assembly shelf of the present invention (5) is the assembly shelf described in (3) or (4), wherein the rail has a top surface, a first guide surface provided adjacent to the top surface on the first side surface side, and a second guide surface provided adjacent to the top surface and facing the first guide surface, the second guide surface being inclined so as to move away from the first side surface as it goes downward.

[0011] The assembly shelf of the present invention (6) is the assembly shelf described in (5), wherein the saddle portion has a guided surface that is guided by the second guide surface, and the guided surface is inclined so as to approach the rail as it goes upward.

[0012] The assembly shelf of the present invention (7) is the assembly shelf according to (5) or (6), wherein the beam member has a beam body extending in a normal direction of the first side surface, and the normal direction of the first side surface coincides with the longitudinal direction.

[0013] Furthermore, the assembly shelf of the present invention (8) is the assembly shelf described in any one of (1) to (7), wherein the support member has an additional first side surface provided at a position facing the first side surface and adjacent to the second side surface.

[0014] According to the present invention, it is possible to provide an assembly shelf in which the installation height of the beam members can be adjusted in finer increments and the installation height of the beam members can be changed extremely easily.

[0015] 7 is a perspective view showing an embodiment of an assembly shelf.

[0023] FIG. 1 is a perspective view showing a state in which shelf boards are removed from the assembly shelf shown in FIG. 1 .

[0024] FIG. 2 is a perspective view showing a state in which a beam member is suspended in midair from the assembly shelf shown in FIG. 3 .

[0025] FIG. 3 is an exploded perspective view showing the frame of the assembly shelf shown in FIG. 3 .

[0026] FIG. 4 is an enlarged perspective view of a portion of the assembly shelf shown in FIG. 2 .

[0027] FIG. 5 is a perspective view showing the assembly shelf shown in FIG. 2 in a state in which the beam member has been rotated 180° to suspend the first and second portions in a position where they are easily visible.

[0028] FIG. 6 is a perspective view showing the assembly shelf shown in FIG. 2 in a first position where the second portion of the beam member faces the second side surface of the support member.

[0029] FIG. 7 is a perspective view showing the assembly shelf shown in FIG. 7 in a second position where the beam member has been moved in the normal direction of the second side surface and fixed to the support member by inserting the protrusion into one of a plurality of recesses.

[0029] FIG. 7 is a perspective view showing the assembly shelf shown in FIG. 7 in a state in which the beam member has been moved downward to a third position under its own weight.

[0029] FIG. 8 is a cross-sectional view showing the assembly shelf shown in FIG. 2 in a first position where the second portion of the beam member faces the second side surface of the support member. 10 is a cross-sectional view showing a state in which the beam member has been moved in a normal direction to the second side surface of the assembly shelf shown in FIG. 10 to a second position where the protrusion has been inserted into one of the plurality of recesses and fixed to the support member. 11 is a perspective view showing a state in which the beam member has been moved downward to a third position by its own weight and the protrusion has fallen into the second recess. 12 is a cross-sectional view showing a state in which the beam member has been moved in a normal direction to the second side surface of the assembly shelf shown in FIG. 10 to a second position where the protrusion has been inserted into one of the plurality of recesses and fixed to the support member. 13 is a cross-sectional view showing a state in which the beam member has been moved downward to the third position by its own weight and the guided surface of the beam member has been guided by the second guide surface of the rail and the beam member has been pressed against the first side surface by the effect of the wedge. 14 is a perspective view showing a state in which the assembly shelf shown in FIG. 2 is in the middle of being installed. 15 is a perspective view showing an assembly shelf of a modified example of the present embodiment.

[0016] An embodiment of the assembly shelf of the present invention will be described below with reference to the drawings. The assembly shelf of the present invention is composed of an extremely small number of parts and is easy to assemble and disassemble. In addition, the installation height of the beam members can be adjusted at finer intervals, and the concave and convex shapes are simple, making it easy to clean. In the following description, the longitudinal direction of the assembly shelf is designated L, the short side direction intersecting (orthogonal to) the longitudinal direction L of the assembly shelf is designated S, and the height direction of the assembly shelf (axial direction of the support members) is designated A. [First embodiment]

[0017] As shown in Figures 1 to 3, the assembly shelf 11 comprises a total of four support members 12 provided at four corners, a plurality of rod-shaped connectors 13 provided along the short side direction S and connecting the support members 12 together, a plurality of beam members 14 extending laterally and spanning between the support members 12 along the long side direction L, legs 15 provided at the lower ends of the connectors 13, and shelf boards 16 spanning between a pair of beam members 14.

[0018] 1 and 15 , the shelf board 16 has a pair of hook portions 17 at both ends in the short side direction S, which are hooked onto the pair of beam members 14. The shelf board 16 has a plurality of through holes 18. The through holes 18 are formed to be elongated in the short side direction S, for example.

[0019] The connectors 13 are provided at the upper end and the lower end of the support member 12. The connectors 13 are formed in the same shape as each other. The connectors 13 extend in the lateral direction (horizontal direction).

[0020] As shown in Figures 3 and 4, each of the connectors 13 is formed in a prismatic shape with a vertically elongated rectangular cross section, with a pair of insertion holes 21 at both ends. The support members 12 can be easily connected to each other by inserting the prismatic insertion portions 22 provided at both ends of the support members 12 into the insertion holes 21. The connectors 13 are integrally molded from a resin material, but may have a core member inside, such as a hollow square steel pipe. In this case, the connectors 13 can be manufactured by insert molding, for example.

[0021] Legs 15 are attached to the connectors 13 located at the lower ends of the support members 12. As shown in Figure 4, the legs 15 are configured with a combination of bolts 15A and nuts 15B, and the length of the legs 15 protruding from the connectors 13 can be adjusted as needed. Of course, the legs 15 can also be configured with casters, making the assembly shelf 11 movable.

[0022] 1 to 4, the four support members 12 are configured in the same manner. Each support member 12 extends vertically. Each support member 12 has an insertion portion 22 at both ends in the axial direction A (upper and lower).

[0023] 4 to 6, the support member 12 is formed in a rectangular column shape. The support member 12 is integrally formed from a resin material, but may have a core material inside that is made of, for example, a hollow square steel pipe. In that case, the support member 12 can be manufactured by, for example, insert molding.

[0024] In FIG. 6, in order to facilitate understanding of the structure of the assembly shelf 11, the beam members 14 are shown in a position rotated by 180 degrees from the actual position and suspended in the air.

[0025] The support member 12 has a pair of first side surfaces 23 facing each other, a second side surface 24 adjacent to the first side surfaces 23, and a pair of rails 25 protruding from the second side surfaces 24. A normal line 31 direction of the first side surfaces (a linear direction perpendicular to the first side surfaces 23) is aligned with the longitudinal direction L of the assembly shelf 11. A normal line 32 direction of the second side surfaces (a linear direction perpendicular to the second side surfaces 24) is aligned with the lateral direction S of the assembly shelf 11. The second side surfaces 24 are perpendicular to both of the pair of first side surfaces 23. The support member 12 is bilaterally symmetrical.

[0026] Each of the pair of first side surfaces 23 has a plurality of recesses 33 spaced at regular intervals in the axial direction A, a plurality of second recesses 34 extending downward from the innermost portions of the recesses 33, and a substantially rectangular protrusion 35 provided at a position surrounded by the recesses 33 and the second recesses 34. The recesses 33 extend in the horizontal direction, i.e., in the direction of a normal 32 to the second side surface 24 (a direction perpendicular to the second side surface 24).

[0027] Each of the second recesses 34 is continuous with the innermost portion of the recess 33 (the end of the recess 33 opposite the second side surface 24 side). The second recesses 34 extend in the vertical direction (the axial direction A of the support member 12). When the first side surface 23 is viewed from the front, the recesses 33 and the second recesses 34 form an "L" shape. The lower end of each second recess 34 is continuous with the innermost portion of the recess 33 located directly below. The shape of the lower end of the second recess 34 is not limited to this. For example, a protrusion may be provided extending from the lower end of the protrusion 35 in the direction of the normal 32 of the second side surface so as to separate the lower end of the second recess 34 from the recess 33 directly below.

[0028] The protrusion 35 is formed in a substantially square shape when the first side surface 23 is viewed from the front. The protrusion 35 is formed to protrude by several millimeters from the portion that constitutes the recess 33 and the second recess 34. The protrusion 35 is formed to straddle from a first guide surface 42 (described later) of the rail 25 to the first side surface 23.

[0029] 6 , the pair of rails 25 extend in the axial direction A of the support member 12. The pair of rails 25 are provided at both widthwise ends of the second side surface 24. Each of the pair of rails 25 has a top surface 41, a first guide surface 42 provided adjacent to the top surface 41 on the first side surface 23 side, and a plurality of second guide surfaces 43 provided adjacent to the top surface 41 and facing the first guide surface 42.

[0030] The multiple second guide surfaces 43 are arranged in series in the axial direction A of the support member 12 so as to correspond one-to-one to the multiple recesses 33 provided at regular intervals in the axial direction A of the support member 12. Each of the multiple second guide surfaces 43 is inclined so as to move downwardly away from the first side surface 23. Therefore, when the beam member 14 moves from the second position P2 to the third position P3, the second guide surfaces 43 can attract the beam member 14 in a direction approaching the first side surface 23 and position it.

[0031] As shown in Figures 2 and 3, the multiple beam members 14 are formed to have the same shape. The beam members 14 extend in the lateral (horizontal) direction. The beam members 14 are integrally formed from a resin material, but may have a core member formed of, for example, a hollow square steel pipe inside a beam main body 46 (described later). In this case, the beam members 14 can be manufactured by, for example, insert molding.

[0032] 6 and 7 , the beam member 14 has a first portion 44 facing the first side surface 23, a second portion 45 facing the second side surface 24, and a beam main body 46 extending from the first portion 44 in the direction of the normal 31 to the first side surface. The first portion 44 and the second portion 45 form an "L" shape when viewed from the axial direction A of the support member 12. The beam main body 46 is formed in the shape of a rectangular column having a vertically elongated cross section.

[0033] The first portion 44 has a plurality of protrusions 47 and a plurality of hooks 53 extending laterally (horizontally) from the upper ends of each of the plurality of protrusions 47. The first portion 44 has, for example, three protrusions 47 and three hooks 53. Each of the protrusions 47 has a substantially square shape when viewed from the front of the first portion 44. The hooks 53 are formed integrally with the protrusions 47. The protrusions 47 and the hooks 53 are formed to protrude by several millimeters from the rest of the first portion 44. The spacing between the plurality of protrusions 47 is formed to be substantially the same as the spacing between the recesses 33.

[0034] As shown in FIG. 12, the hook portion 53 constitutes a portion on which the protrusion 35 of the support member 12 hooks when the beam member 14 is in the third position P3.

[0035] As shown in Figure 6, the second portion 45 is plate-shaped. The second portion 45 has a saddle portion 51 that is saddle-shaped (arch-shaped in cross section). The saddle portion 51 extends in the axial direction A of the support member 12 and can straddle the rail 25. The saddle portion 51 has a plurality of guided surfaces 51A that are guided by the second guide surface 43. As shown in Figures 6, 7, 13, etc., the guided surfaces 51A are inclined so as to approach the rail 25 (the central axis C of the rail 25) as they extend upward.

[0036] Next, the assembly method and operation of the assembly shelf 11 of this embodiment will be described. First, as shown in Figure 4, a worker connects a pair of support members 12 to each other in the short direction S via a pair of connectors 13 to form a frame-shaped frame body 52. ​​In this process, the worker fixes the upper ends of the support members 12 to each other with the upper connector 13, and fixes the lower ends of the support members 12 to each other with the lower connector 13. Furthermore, the worker attaches the legs 15 to the lower connector 13. In this manner, two frame bodies 52 are formed.

[0037] 2, 3, 6, and 7, the worker stretches the beam member 14 between adjacent support members 12 in the longitudinal direction L. At this time, as shown in FIGS. 7 and 10, the worker separates the beam member 14 from the support members 12 and places it in the first position P1 with the second portion 45 facing the second side surface 24.

[0038] As shown in Figures 7 and 8 , the worker moves the beam member 14 from its first position P1 in the direction of the normal 32 of the second side surface (substantially horizontal direction) and inserts the protrusion 47 into one of the multiple recesses 33 to move it to a second position P2 where it is fixed to the support member 12. At this time, the saddle portion 51 of the second portion 45 of the beam member 14 straddles the rail 25 of the support member 12. At this time, as shown in Figures 10 and 11 , the three protrusions 47 of the beam member 14 are inserted into the three recesses 33 of the support member 12. The worker inserts the protrusions 47 of the beam member 14 all the way into the innermost portions of the recesses 33 of the support member 12.

[0039] The beam member 14, which has been inserted to the deepest portion of the recess 33 of the support member 12, can be pushed down by hand or by hitting it from above with a tool such as a hammer, as shown in Fig. 9. At this time, as shown in Figs. 11 and 12, the convex portion 47 of the beam member 14 moves from the deepest portion of the recess 33 of the support member 12 to drop into the second recess 34. This moves the beam member 14 from the second position P2 to the third position P3. In this embodiment, the beam member 14 is pushed in by hand or a tool to move from the second position P2 to the third position P3, but this is not limiting. The beam member 14 may also move from the second position P2 to the third position P3 by its own weight.

[0040] At this time, as shown in FIG. 12 , the convex portion 47 that has fallen into the second recess 34 engages with the protrusion 35 of the support member 12. As a result, when the beam member 14 is in the third position P3, the beam member 14 is locked to the support member 12 and will not fall off from the support member 12 in this state. That is, when a force moment acts on the beam member 14 in a direction from the second side surface 24 to the first side surface 23, the saddle portion 51 of the second portion 45 gets caught on the rail 25, preventing the beam member 14 from falling off from the support member 12. On the other hand, when a force moment acts on the beam member 14 in a direction from the first side surface 23 to the second side surface 24, the convex portion 47 that has fallen into the second recess 34 gets caught on the protrusion 35, preventing the beam member 14 from falling off from the support member 12.

[0041] In this way, in the assembly shelf 11 of this embodiment, the beam members 14 are locked by movement from the second position P2 to the third position P3, so no additional fixing parts are required to lock the beam members 14. This reduces the number of parts and simplifies the overall configuration of the assembly shelf 11. Furthermore, even if vibrations or the like are applied to the assembly shelf 11 when the assembly shelf 11 is moved, the beam members 14 will not unintentionally fall off the support members 12.

[0042] When the beam member 14 moves from the second position P2 to the third position P3, the saddle portion 51 of the second portion 45 of the beam member 14 can slide along the rail 25 of the support member 12. This stabilizes the posture of the beam member 14 as it moves from the second position P2 to the third position P3, and prevents the beam member 14 from falling off the support member 12 during movement.

[0043] When the beam member 14 moves from the second position P2 to the third position P3, the beam member 14 is positioned relative to the support member 12 and firmly fixed to the support member 12 by the wedge effect acting between the second guide surface 43 of the rail 25 and the guided surface 51A of the saddle portion 51. This positioning of the beam member 14 is performed in the longitudinal direction L of the assembly shelf 11. That is, as shown in Figures 13 and 14 , when the beam member 14 moves from the second position P2 to the third position P3, the guided surface 51A of the beam member 14 is guided by the second guide surface 43 of the rail 25.

[0044] At this time, the second guide surface 43 is configured to move away from the first side surface 23 as it goes downward, and the guided surface 51A is inclined so as to move closer to the rail 25 (the central axis C of the rail 25) as it goes upward, so a wedge effect is produced, attracting (pressing) the beam member 14 against the first side surface 23 of the support member 12. This firmly fixes the beam member 14 to the support member 12. It also prevents the beam member 14 from rattling, and properly positions the beam member 14 in the longitudinal direction L of the assembly shelf 11. It also prevents the beam member 14 from falling off the support member 12 unintentionally.

[0045] In this embodiment, the beam member 14 is positioned precisely only in the longitudinal direction L, where the size has a large effect and misalignment is easily noticeable. As for the transverse direction S, the size has a small effect and misalignment is less noticeable, so no special positioning is performed.

[0046] As shown in Fig. 2, after the beam members 14 are installed at a predetermined installation height, a shelf board 16 is installed between the pair of beam members 14 as shown in Fig. 15. The shelf board 16 can be easily attached to the pair of beam members 14 by aligning the pair of hook portions 17 with the beam members 14 and placing it on the beam members 14. By installing the shelf boards 16 on all of the beam members 14, the assembly of the assembly shelf 11 is completed as shown in Fig. 1. To disassemble the assembly shelf 11, simply follow the above procedure in reverse.

[0047] When it is desired to change the installation height of the shelf board 16, the installation height of the shelf board 16 can be changed very easily by appropriately changing the position of the beam member 14 relative to the support member 12 with the shelf board 16 removed.

[0048] FIG. 16 shows a modified example of the assembly shelf 11. In this modified assembly shelf 11, a single support member 12, which is symmetrical as described above, also serves as a support for two assembly shelves 11. That is, of the support member 12 located in the center of the drawing, the first side surface 23 located on the left and the rail 25 located on the left are used to support the left assembly shelf 11. Similarly, of the support member 12 located in the center of the drawing, the first side surface 23 located on the right and the rail 25 located on the right are used to support the right assembly shelf 11. In this manner, two assembly shelves 11 can be connected for use. Furthermore, the number of assembly shelves 11 that can be connected is not limited to two, and assembly shelves 11 can be connected to each other an infinite number of times as long as space permits.

[0049] According to this embodiment, the following can be said: The assembly shelf 11 includes a support member 12 having a first side surface 23 with a plurality of recesses 33 provided at regular intervals in the axial direction A of the assembly shelf 11, a second side surface 24 adjacent to the first side surface 23, and a beam member 14 having a first portion 44 with a convex portion 47 facing the first side surface 23, and a second portion 45 provided adjacent to the first portion 44 and facing the second side surface 24, each of the plurality of recesses 33 extending in the direction of a normal line 32 to the second side surface, and the beam member 14 is movable between a first position P1 where the second portion 45 faces the second side surface 24 while separated from the support member 12, and a second position P2 where the beam member 14 is moved from the first position P1 in the direction of the normal line 32 to the second side surface and fixed to the support member 12 with the convex portion 47 inserted into one of the plurality of recesses 33.

[0050] According to this configuration, the beam member 14 can be fixed to the support member 12 with a single touch using a simple structure in which the convex portion 47 is inserted into the first concave portion 33. This makes it extremely easy to change the installation height of the beam member 14. Furthermore, because the beam member 14 can be fixed by moving it in the direction of the normal 32 of the second side surface, the concave portions 33 can be placed at relatively small intervals, allowing the installation height of the beam member 14 to be adjusted at even finer intervals. Furthermore, the simple structure combining the convex portion 47 and the concave portion 33 makes it easy to clean and suitable for use in food factories, etc.

[0051] In this case, the first side surface 23 has a plurality of second recesses 34, each of which extends downward from the innermost portion of each of the plurality of recesses 33, and the convex portion 47 can fall into the second recess 34 at the second position P2, and accordingly, the beam member 14 can move from the second position P2 to a third position P3 which is lower than the second position P2.

[0052] According to this configuration, the convex portion 47 falls into the second recess portion 34, and the beam member 14 moves from the second position P2 to the third position P3, thereby preventing the beam member 14 from unintentionally falling off the support member 12.

[0053] In this case, the support member 12 includes a rail 25 protruding from the second side surface 24 and extending in the axial direction A, and the second part 45 has a saddle-shaped saddle portion 51 that extends in the axial direction A and can straddle the rail 25, and the saddle portion 51 can slide along the rail 25 when the beam member 14 moves between the second position P2 and the third position P3.

[0054] According to this configuration, since the second part 45 has a saddle portion 51, it is possible to prevent the beam member 14 from falling off the support member 12 when the beam member 14 moves from the second position P2 to the third position P3.

[0055] The first side surface 23 has a protrusion 35 at a position surrounded by the recess 33 and the second recess 34, and when the beam member 14 is in the third position P3, the protrusion 47 that falls into the second recess 34 engages with the protrusion 35.

[0056] This configuration prevents the beam member 14 from falling off the support member 12 when the beam member 14 is in the third position P3. That is, when a force moment acts on the beam member 14 in a direction from the second side surface 24 to the first side surface 23, the saddle portion 51 of the second portion 45 gets caught on the rail 25, preventing the beam member 14 from falling off the support member 12. On the other hand, when a force moment acts on the beam member 14 in a direction from the first side surface 23 to the second side surface 24, the convex portion 47 that has fallen into the second recess 34 gets caught on the protrusion 35, preventing the beam member 14 from falling off the support member 12.

[0057] The rail 25 has a top surface 41, a first guide surface 42 provided adjacent to the top surface 41 on the side of the first side surface 23, and a second guide surface 43 provided adjacent to the top surface 41 and facing the first guide surface 42, the second guide surface 43 being inclined so as to move away from the first side surface 23 as it extends downward.

[0058] According to this configuration, when the beam member 14 moves from the second position P2 to the third position P3, the second guide surface 43 acts as a wedge, drawing the beam member 14 to the first side surface 23 of the support member 12. This positions the beam member 14 relative to the support member 12 and prevents the beam member 14 from wobbling. In addition, the wedge effect allows the beam member 14 to be firmly fixed to the support member 12. This prevents the beam member 14 from falling off the support member 12 unintentionally by the user.

[0059] The saddle portion 51 has a guided surface 51A that is guided by the second guide surface 43, and the guided surface 51A is inclined so as to approach the rail 25 as it goes upward.

[0060] With this configuration, when the beam member 14 moves from the second position P2 to the third position P3, the guided surface 51A, in addition to the second guide surface 43, acts like a wedge, drawing the beam member 14 to the first side surface 23 of the support member 12. This positions the beam member 14 relative to the support member 12 and prevents the beam member 14 from wobbling. Furthermore, by further increasing the effect of the wedge, the beam member 14 can be more firmly fixed to the support member 12.

[0061] The beam member 14 has a beam main body 46 extending in the direction of the normal 31 to the first side surface, and the direction of the normal 31 to the first side surface coincides with the longitudinal direction L.

[0062] With this configuration, the beam members 14 can be positioned with respect to the longitudinal direction L of the assembly shelf 11. Therefore, with the above configuration, the beam members 14 can be positioned with respect to the support members 12 with respect to the longitudinal direction L of the assembly shelf 11, which generally requires stricter positioning standards. Conversely, in the present invention, positioning with respect to the transverse direction S, which intersects with the longitudinal direction L, is not considered important because the length is shorter in the transverse direction S and therefore the influence of misalignment is smaller in the transverse direction S than in the longitudinal direction L.

[0063] The support member 12 has an additional first side surface 23 provided at a position opposite the first side surface 23 and adjacent to the second side surface 24. With this configuration, the support member 12 can be formed symmetrically, and beam members 14 can be attached to both the left and right sides of the support member 12. As a result, when two assembly shelves 11 are arranged adjacent to each other, one support member 12 can be shared by the two assembly shelves 11, reducing the number of support members 12 and lowering the cost of introducing the assembly shelves 11 to factories and stores. Furthermore, by connecting several assembly shelves 11 in series, the rigidity of the assembly shelves 11 can be increased, resulting in a more stable assembly shelf 11.

[0064] The above-described embodiment can be implemented with various further substitutions and modifications, and it goes without saying that the above-described different embodiments can be appropriately combined to form a single invention.

[0065] REFERENCE SIGNS LIST 11 Assembly shelf 12 Support member 14 Beam member 23 First side surface 24 Second side surface 25 Rail C Central axis 31 Normal line to first side surface 32 Normal line to second side surface 33 Recessed portion 34 Second recessed portion 35 Protrusion 41 Top surface 42 First guide surface 43 Second guide surface P1 First position P2 Second position P3 Third position 44 First portion 45 Second portion 46 Beam body 47 Convex portion 51 Saddle portion 51A Guided surface 52 Frame body L Longitudinal direction S Shortitudinal direction A Axial direction

Claims

1. An assembly shelf comprising: a support member having a first side having a plurality of recesses spaced at regular intervals in its axial direction, and a second side adjacent to the first side; and a beam member having a first portion having a convex portion facing the first side, and a second portion adjacent to the first portion and facing the second side, wherein each of the plurality of recesses extends in a normal direction of the second side, and the beam member is movable between a first position in which the second portion faces the second side while separated from the support member, and a second position in which the beam member is moved from the first position in the normal direction of the second side and fixed to the support member with the convex portion inserted into one of the plurality of recesses.

2. The assembly shelf as described in claim 1, wherein the first side has a plurality of second recesses, each of the plurality of second recesses extending downward from the innermost portion of each of the plurality of recesses, and the convex portion is capable of dropping into the second recess at the second position, and accordingly, the beam member is capable of moving from the second position to a third position lower than the second position.

3. The assembly shelf according to claim 2, wherein the support member includes a rail that protrudes from the second side surface and extends in the axial direction, the second portion has a saddle-shaped saddle portion that extends in the axial direction and can straddle the rail, and the saddle portion is capable of sliding along the rail when the beam member moves between the second position and the third position.

4. An assembly shelf as described in claim 3, wherein the first side has a protrusion at a position surrounded by the recess and the second recess, and when the beam member is in the third position, the protrusion that falls into the second recess engages with the protrusion.

5. An assembly shelf as described in claim 3, wherein said rail has a top surface, a first guide surface provided adjacent to said top surface on the first side surface, and a second guide surface provided adjacent to said top surface and facing said first guide surface, said second guide surface being slanted so as to move away from said first side surface as it extends downward.

6. The assembly shelf according to claim 5, wherein said saddle portion has a guided surface that is guided by said second guide surface, said guided surface being inclined so as to approach said rail as it goes upward.

7. The assembly shelf according to claim 5, wherein the beam member has a beam body extending in a normal direction of the first side surface, and the normal direction of the first side surface coincides with the longitudinal direction.

8. The assembly shelf according to claim 1, wherein said support member has an additional first side surface provided at a position opposite said first side surface and adjacent to said second side surface.

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