Reinforced shelf

Abstract

To provide a reinforced shelf board having improved strength.SOLUTION: A reinforced shelf board 5B comprises: a shelf board body 50 including a groove part 51 formed at one surface to extend in a longitudinal direction; and a reinforcing material 7 including an insertion part 73 provided to extend in the longitudinal direction and being inserted in the groove part 51, and a pair of planar contact surfaces 70 provided along the insertion part 73 in both sides thereof, with the insertion part 73 interposed therebetween and coming into one surface of the shelf board body 50. Preferably, the insertion part 73 is formed by folding a metal plate into two.SELECTED DRAWING: Figure 10A

Description

Technical Field

[0001] This disclosure relates to a reinforced shelf board.

Background Art

[0002] Conventionally, in order to reinforce the deflection of a shelf board, a reinforced shelf board has been proposed in which a groove portion is formed on the back surface of the shelf board and a reinforcing member is arranged in this groove portion for reinforcement (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When a groove portion is formed in the shelf board, the portion of the shelf board body where the groove portion is formed becomes thin, so there is a concern that cracks may be formed from the groove portion, and it is desired to reinforce the shelf board with higher strength.

Means for Solving the Problems

[0005] This disclosure relates to a reinforced shelf board including a shelf board body having a groove portion formed to extend in the longitudinal direction on one surface, an insertion portion provided to extend in the longitudinal direction and inserted into the groove portion, and a pair of planar contact portions provided along the insertion portion on both sides sandwiching the insertion portion and contacting one surface of the shelf board body.

Brief Description of the Drawings

[0006] [Figure 1] It is a diagram showing the frame storage body of this embodiment. [Figure 2] It is a view of the base unit and the connection unit of this embodiment viewed from the back side. [Figure 3]This is a plan view of the position where the first and second vertical supports of this embodiment are connected. [Figure 4] This is a side view of the frame housing of this embodiment. [Figure 5A] This is a side cross-sectional view of the unevenness adjustment structure of this embodiment. [Figure 5B] This is a perspective view of a crossbar having an unevenness adjustment structure according to this embodiment. [Figure 6] This is a perspective view of the connecting fitting of this embodiment, seen from the rear side. [Figure 7] This is a perspective view of the shelf fixing structure of this embodiment. [Figure 8A] This is a bottom view of the shelf board of this embodiment. [Figure 8B] This is a cross-sectional view AA in Figure 8A. [Figure 9] This is a perspective view of the shelf support member having an extended portion according to this embodiment. [Figure 10A] This is a bottom view of the shelf board having the reinforcing material according to this embodiment. [Figure 10B] Figure 10A is a cross-sectional view of BB. [Figure 11] This is a perspective view of a connecting fitting according to another embodiment. [Figure 12] This is a perspective view from below of a frame housing according to another embodiment. [Modes for carrying out the invention]

[0007] The embodiments of this disclosure will now be described in detail with reference to the drawings. As shown in Figure 1, the frame storage unit 1 is constructed by arranging storage units with arbitrary functions, such as shelves 5, drawers 81, and storage shelves 82, on a frame unit 10 that is roughly U-shaped in plan view, formed by assembling vertical bars 2 and horizontal bars 3, which will be described later. The frame storage unit 1 can be modified in size and shape by connecting multiple frame-shaped units depending on the location where it is installed, such as a kitchen or study. The frame storage unit 1 has multiple vertical bars 2, multiple horizontal bars 3, and connecting fittings 4.

[0008] In this specification, the left and right directions when viewing the frame unit 10 from the front are referred to as the left-right direction, and the direction perpendicular to the left-right and up-down directions from the front is referred to as the depth direction. In the depth direction, the front side, the near side, and the far side are referred to as the rear side.

[0009] The frame unit 10 is used in the frame storage unit 1 and is a frame-like framework before shelves 5, drawers 81, etc. are attached. The frame unit 10 has a base unit 110 and a connecting unit 120.

[0010] Figure 2 is a view from the rear of the frame unit 10 in Figure 1, with the base unit 110 and the connecting unit 120 (as a second frame) removed and arranged to illustrate the basic configuration of this embodiment. The base unit 110 and the connecting unit 120 each have vertical bars 2 extending in the vertical direction, horizontal bars 3 extending in a direction perpendicular to the vertical direction, and side reinforcing bars 37 extending in the depth direction. The base unit 110 is configured to stand upright by arranging four vertical bars 2 to act as supports and connecting the vertical bars 2 with horizontal bars 3.

[0011] The vertical support beams 2 of the base unit 110 include a rear vertical support beam 211 and a front vertical support beam 212. The rear vertical support beam 211 is located on the rear side of the frame housing 1. The rear vertical support beams 211 are provided in a pair on the rear side of the base unit 110, spaced apart from each other in the left-right direction and arranged approximately parallel to each other. The front vertical support beams 212 are provided in a pair on the front side of the base unit 110, spaced apart from each other in the left-right direction and arranged approximately parallel to each other.

[0012] The horizontal bars 3 of the base unit 110 are the first horizontal bars 31. The first horizontal bars 31 are positioned on the rear side of the frame housing 1. The first horizontal bars 31 are fixed to the rear side vertical bars 211 and connect the pair of rear side vertical bars 211 of the base unit 110. Three first horizontal bars 31 are arranged with space between them in the vertical direction.

[0013] The side reinforcement bar 37 connects in the depth direction between the rear vertical bar 211 and the front vertical bar 212. The side reinforcement bar 37 is configured by fixing the ends of a rectangular tubular profile to the rear vertical bar 211 and the front vertical bar 212.

[0014] The connection unit 120 is a unit that can be connected to the base unit 110. As shown in FIG. 2, the connection unit 120 lacks one of the vertical bars 2 in the left - right direction, and is configured to stand up with the vertical bar 2 of the base unit 110 as a support column by connecting to the base unit 110. As shown in FIGS. 1 and 3, the connection unit 120 can connect not only to an adjacent base unit 110 but also a plurality of vertical bars 2 of other connection units 120 as support columns. As shown in FIGS. 2 and 3, when the connection unit 120 is connected to the base unit 110 or an adjacent connection unit 120, one vertical bar 2 is arranged between the base units 110 or connection units 120 adjacent to each other.

[0015] The connection unit 120 has one rear - side vertical bar 221 and one front - side vertical bar 222 respectively. The rear - side vertical bar 221 of the connection unit 120 is arranged on the rear side of the frame housing 1 and is arranged in a position spaced apart in the left - right direction from the rear - side vertical bar 211 of the base unit 110. The front - side vertical bar 222 of the connection unit is arranged on the front side of the rear - side vertical bar 221.

[0016] The horizontal bar 3 of the connection unit 120 is the second horizontal bar 32. As shown in FIG. 3, only one end of the second horizontal bar 32 is fixed to the rear side of the rear - side vertical bar 221. The other end of the second horizontal bar 32 is connected to the rear - side vertical bar 211 of the base unit 110 on the rear side of the rear - side vertical bar 211 of the base unit 110. Three second horizontal bars 32 are arranged with a space in the up - down direction.

[0017] The side reinforcement bar 37 is the same as the configuration of the base unit 110 and connects in the depth direction between the rear - side vertical bar 221 and the front - side vertical bar 222.

[0018] As shown in Figure 3, a pair of horizontal bars 3 are connected to each other on the back side of the vertical bars 2. Figure 3 is a plan view of the vertical bars 2 and horizontal bars 3, cut slightly above the position where the connecting unit 120 is connected to the base unit 110. The second horizontal bar 32 of the connecting unit 120 is connected to the back side vertical bar 211 of the base unit 110 on the back side of the back side vertical bar 211, thereby connecting the connecting unit 120 to the base unit 110. The connecting fittings 4 that connect the base unit 110 and the connecting unit 120 will be described in detail later.

[0019] The vertical bars 2 have a hollow, rectangular cylindrical shape in both the base unit 110 and the connecting unit 120. Of the vertical bars 2, the front vertical bars 212 and 222 have a receiving member contact surface 23, a locking surface 24, and a locking groove 25. The front vertical bars 212 and 222 are formed so as to be able to lock the shelf board receiving members 6, which will be described later.

[0020] As shown in Figures 1, 6, and 7, the receiving member contact surface 23 is the side to which the shelf board 5, described later, is attached, and is the inner surface of the pair of vertical bars 2 that are spaced apart in the left-right direction and facing each other. The side portion 61 of the shelf board receiving member 6, described later, contacts the receiving member contact surface 23.

[0021] The locking surface 24 is a surface perpendicular to the receiving member contact surface 23, as shown in Figures 2, 6, and 7. The locking surface 24 is formed on the surface of the rear vertical bars 211 and 221 that are opposite each other on the front vertical bars 212 and 222, and the shelf board receiving member 6, which will be described later, is locked to it. The locking surface 24 is located on the rear side of the vertical bar 2, which is not visible from the front.

[0022] The locking groove 25 is a rectangular through groove formed in the locking surface 24. Two locking grooves 25 are formed side by side and parallel to each other in the width direction perpendicular to the longitudinal direction of the locking surface 24. As shown in Figure 2, the locking grooves 25 are positioned in the vertical direction of the vertical support 2 with predetermined intervals in advance for arranging the shelf boards 5, which will be described later, and are grooves into which the shelf board support members 6 are locked.

[0023] Of the vertical bars 2, both the rear-side vertical bars 211, 221 and the front-side vertical bars 212, 222 have receiving member contact surfaces 23. Screw holes 26 for inserting screws 64a, described later, are formed in the receiving member contact surfaces 23 of the rear-side vertical bars 211, 221. The screw holes 26 are spaced apart in the vertical direction, corresponding to the locking grooves 25. In the rear-side vertical bars 211, 221, the locking grooves 25 are not formed on the surfaces perpendicular to the receiving member contact surfaces 23.

[0024] The first horizontal bar 31 and the second horizontal bar 32 of the horizontal bar 3 are positioned on the rear side of the frame housing 1 and are adjacent to each other in the left-right direction. As shown in Figure 4, the horizontal bar 3 is fixed with screws to the wall surface 200 where the frame unit 10 is installed. The horizontal bar 3 is, for example, a mounting member used in the frame housing 1, and as shown in Figure 5B, has a main body portion 30 and a through hole 30a in the main body portion.

[0025] If there is a gap between the horizontal bar 3 and the wall surface 200, the unevenness relative to the wall surface 200 is adjusted by the unevenness adjustment structure 300. The unevenness adjustment structure 300 includes a male screw body 33, a female screw body 34, and a fastener 35.

[0026] The main body 30 is a casing with a rectangular cylindrical outer shape consisting of the first crossbar 31 and the second crossbar 32, and has an internal female screw body 34.

[0027] The through-hole 30a in the main body extends through the main body 30 in the thickness direction, and since the inside of the main body 30 is hollow, it is constructed by forming circular holes on both the back and front sides of the main body 30. Both the male screw body 33 and the fastener 35, which will be described later, can be inserted through the through-hole 30a in the main body.

[0028] The female threaded body 34 is specifically a cylindrical nut with a female thread groove 34d formed on its inner circumferential surface. The female threaded body 34 is located inside the main body portion 30 of the horizontal bar 3, which is a mounting member. The female threaded body 34 engages with the surface of the male threaded body 33, which will be described later, and is arranged to be able to move back and forth by screwing into the male thread groove of the male threaded body 33. The female threaded body 34 has a small diameter portion 34a and a large diameter portion 34b. As shown in Figure 5A, the small diameter portion 34a engages with the inner circumference of the through hole 30a of the main body portion 30, which is located on the back side (wall surface 200 side) of the main body portion 30. The large diameter portion 34b expands in diameter from the small diameter portion 34a and is located inside the main body portion 30. A step 34c is formed at the joint between the small diameter portion 34a and the large diameter portion 34b, and the back side surface of the large diameter portion 34b engages with the inner surface of the through hole 30a of the main body portion 30 on the back side of the main body portion 30. The large diameter portion 34b prevents the female threaded body 34 from falling out of the main body portion 30.

[0029] The male threaded body 33 is a separate component from the main body 30. As shown in Figure 5A, the male threaded body 33 has a shaft portion 331, a flange portion 332, a through hole 333, and a hexagonal inner circumference portion 334.

[0030] The shaft portion 331 is a substantially cylindrical part that can be inserted into the through hole 30a of the main body portion 30. A through hole 333 is formed inside the shaft portion 331, extending axially. One end of the shaft portion 331 is positioned to abut against the wall surface 200, and the other end extends away from the wall surface 200. A male screw groove 331a is formed on the outer circumferential surface of the shaft portion 331.

[0031] The flange portion 332 is a disc-shaped part located at the end of the shaft portion 331 and has a larger outer diameter than the shaft portion 331. The flange portion 332 has a flat surface that can contact the wall surface 200. The outer diameter of the flange portion 332 is larger than the diameter of the through hole 30a formed on the back side of the main body portion 30. Since the male threaded body 33 is screwed into the female threaded body 34, the flange portion 332 prevents the female threaded body from falling out from the front side of the through hole 30a.

[0032] The hexagonal inner circumference portion 334 is formed inside the shaft portion 331, on a part of the inner surface of the shaft portion 331. The hexagonal inner circumference portion 334 has a circumferential surface formed in a substantially hexagonal shape in plan view of the inner surface of the shaft portion 331, and a hollow portion inside the circumferential surface that communicates with the through hole 333, and is configured so that a hex wrench (not shown) can be inserted.

[0033] The fastener 35 is a screw inserted into the through hole 333. The fastener 35 has a shaft portion 351 that can be inserted into the through hole 333 and a head portion 352 with an outer diameter larger than the outer diameter of the through hole 30a of the main body.

[0034] A method for adjusting and fixing the unevenness of the main body 30 in the unevenness adjustment structure 300 will now be described. The flange portion 332 of the male threaded body 33 is brought into contact with the wall surface 200 at a position opposite to the through hole 30a of the main body. The shaft portion 331 of the male threaded body 33 is inserted into the through hole 30a of the main body. When the male threaded body 33 is inserted into the through hole 30a of the main body, it lightly engages with the female threaded body 34 located inside the through hole 30a of the main body. Then, by inserting a hexagonal wrench into the hexagonal inner circumference portion 334 of the shaft portion 331 from the front side of the through hole 30a of the main body and manipulating it, the male threaded body 33 is rotated. As the male threaded body 33 rotates, the female threaded body 34 engages with the male thread groove 331a formed on the surface of the male threaded body 33 and moves back and forth. By rotating the hex wrench and moving the female threaded body 34 toward the flange portion 332, the main body portion 30 on which the female threaded body 34 is located moves closer to the wall surface 200. With the flange portion 332 of the male threaded body 33 in contact with the wall surface 200, the position of the female threaded body 34 is adjusted by operating the hex wrench, and as a result, the unevenness between the main body portion 30 and the wall surface 200 is adjusted. That is, by adjusting the screwing position of the male thread groove 331a and the female thread groove 34d, the relative axial position of the male threaded body 33 and the female threaded body 34 is changed, and the unevenness of the main body portion 30 relative to the wall surface 200 is adjusted. After the unevenness is adjusted, the fixing device 35 is inserted from the through hole 30a to the through hole 333 in the main body portion, drilling into the wall surface 200 and fixing the main body portion 30 to the wall surface 200.

[0035] As shown in Figure 6, the connecting fitting 4 is a fitting that connects the first crossbar 31 of the base unit 110 and the second crossbar 32 of the connecting unit 120. Figure 6 shows the part where the base unit 110 and the connecting unit 120 are connected, viewed from the rear. The connecting fitting 4 connects the pair of first crossbars 31 and second crossbars 32 by being fixed to the upper surfaces of the respective first and second crossbars 31 and second crossbars 32. The connecting fitting 4 is a flat plate with a width narrower than the width of the upper surface of the crossbar 3 and a length shorter than the crossbar 3, and is fixed to the upper surfaces of the first crossbar 31 of the base unit 110 and the second crossbar 32 of the connecting unit 120. The connecting fitting 4 has a first fixing part 41, a second fixing part 42, and a third fixing part 43. The first fixing part 41 is fixed to the upper surface of the first crossbar 31 with a screw. The second fixing part 42 is fixed to the upper surface of the second crossbar 32 with a screw. The third fixing part 43 is positioned between the first fixing part 41 and the second fixing part 42 and is fixed to the back of the rear vertical bar 211. Since the third fixing part 43 is positioned over the reinforcing fitting 44 that connects the vertical bar 2 and the horizontal bar 3, it is bent upwards at approximately the center of the longitudinal direction of the connecting fitting 4.

[0036] As shown in Figure 7, when the top plate 59 is placed on the upper end of the frame unit 10, the connecting fitting 4 may be fixed to the lower surface of the horizontal bar 3 instead of the upper surface of the horizontal bar 3.

[0037] The method for fixing the base unit 110 and the connecting unit 120 will now be explained. First, the first horizontal bar 31 of the base unit 110 is fixed to the wall surface 200 at the installation location. Next, the connecting unit 120 is moved next to the base unit 110, and the positions of the rear vertical bar 221 and the second horizontal bar 32 of the connecting unit 120 are aligned with the rear vertical bar 211 and the first horizontal bar 31 of the base unit 110. Then, the first fixing part 41 of the connecting fitting 4 is fixed to the upper surface of the first horizontal bar 31 of the base unit 110, and the second fixing part 42 is fixed to the upper surface of the second horizontal bar 32 of the connecting unit 120. Finally, the connecting unit 120 is fixed to the wall surface 200 while adjusting the unevenness of the horizontal bar 3 with the unevenness adjustment structure 300. As shown in Figure 4, since the horizontal bar 3 is connected on the rear side of the vertical bar 2, even if, for example, a baseboard 201 is placed on the wall surface 200, the frame unit 10 is fixed to the wall surface 200 while avoiding the baseboard 201.

[0038] Next, the fixing structure 400 for the shelf board 5 attached to the frame unit 10 will be described. The fixing structure 400 for the shelf board 5 includes vertical support bars 2, the shelf board 5, a shelf board support member 6, and a positioning member 55.

[0039] The shelf board 5 is a board material that is arranged substantially horizontally on the frame unit 10 and on which any item can be placed. The user can arrange multiple shelf boards 5 in any desired position and in any desired number. The shelf board 5 may be made of, for example, medium-density fiberboard, but the material is not limited. As shown in Figure 1, the shelf board 5 may be a board material that is substantially the same as the depth dimension of the frame unit 10 in the depth direction, or it may be a board material that is formed to be shorter in the depth direction than the frame unit 10. The left-right dimension of the shelf board 5 is preferably the same as the left-right dimension of the base unit 110 or the connecting unit 120 from the viewpoint of attaching it to the frame unit 10, but is not limited.

[0040] The shelf support members 6 are attached to both ends of the shelf 5 in the left-right direction and support the shelf 5. The shelf support members 6 are fittings that connect the vertical rails 2 (rear vertical rails 211, 221 and front vertical rails 212, 222) and are locked and fixed to the vertical rails 2. The shelf support members 6 are elongated members, and their longitudinal direction is aligned with the depth direction of the frame unit 10. The shelf support members 6 have a side portion 61, a support surface portion 62, a locking piece 63, an extension portion 66, and a positioning engagement hole 65.

[0041] The side portion 61 is a surface that can contact the receiving member contact surface 23 of the pair of vertical bars 2. The side portion 61 has a vertically elongated shape, with its width direction aligned with the vertical direction of the vertical bars 2 and its longitudinal direction aligned with the depth direction of the shelf board 5, extending between the pair of vertical bars 2 (rear side vertical bars 211, 221 and front side vertical bars 212, 222). The side portion 61 has a fixing piece 64 that extends continuously upward from the end on the rear side vertical bars 211, 221 side. The length of the upward extension of the fixing piece 64 is not limited, but may be, for example, about the same as the vertical dimension of the extension portion 66 described later. The fixing piece 64 contacts the receiving member contact surface 23 of the rear side vertical bars 211, 221 and is fixed by screws 64a.

[0042] The support surface 62 is perpendicular to the lower end of the side surface 61 and supports the shelf board 5 from below. The support surface 62 and the side surface 61 are arranged in a roughly L-shape in cross-section. As shown in Figure 8A, the support surface 62 has a roughly rectangular shape, with its shorter side aligned with the left-right direction of the frame unit 10 and its longer side aligned with the depth direction of the shelf board 5. The width dimension of the support surface 62 is greater than the width dimension of the side surface 61. The support surface 62 has positioning engagement holes 65, which will be described later.

[0043] The locking piece 63 is provided on the upper part of one side of the side portion 61, that is, the end on the front vertical bar 212, 222 side. The locking piece 63 is bent so as to fold back from the rear vertical bar 211, 221 side to the front vertical bar 212, 222 side. The locking piece 63 is continuous with the upper end of the extension portion 66, which will be described later, and forms a roughly U-shape in plan view. As shown in Figure 7, the locking piece 63 extends from the rear side toward the locking surface 24 of the front vertical bar 212, 222 and is inserted into the locking groove 25 and locked.

[0044] As shown in Figure 8B, the extension portion 66 is a part that extends upward from the upper end of one end of the side portion 61. The extension portion 66 is supported between the front vertical bars 212 and 222 of the side portion 61 and the locking piece 63 and extends in the vertical direction. The extension portion 66 is a short portion of the metal plate surface that is continuous with the side portion 61 and extends toward the upper locking piece 63.

[0045] The positioning engagement hole 65 is preferably formed at a position away from the rear end of the shelf support member 6 on the support surface portion 62, towards the front. As shown in Figure 8A, the positioning engagement hole 65 is a gourd-shaped through hole having a wide portion 651 and a narrow portion 652. The wide portion 651 is a nearly circular hole with a diameter larger than the maximum outer diameter of the positioning member 55, which will be described later. The narrow portion 652 is smaller than the wide portion 651 and has a substantially U-shaped outer edge with a diameter smaller than the maximum outer diameter of the positioning member 55, which will be described later. The wide portion 651 and the narrow portion 652 are continuous at adjacent peripheries.

[0046] The positioning member 55 is provided so as to protrude downward from the bottom surface of the shelf board 5. Specifically, the positioning member 55 is a stepped screw. As shown in Figures 7 and 8B, the positioning member 55 has a screw shaft portion 551 and a screw head portion 552. The screw shaft portion 551 is a substantially cylindrical body with screw grooves formed on its surface and is fastened and fixed to the bottom surface of the shelf board 5. The screw head portion 552 has a large diameter portion 552a and a small diameter portion 552b. The small diameter portion 552b is a circumferential portion that widens from the end of the screw shaft portion 551. The small diameter portion 552b is located on the screw shaft portion 551 side of the positioning member 55, is located between the screw shaft portion 551 and the large diameter portion 552a, is smaller than the large diameter portion 552a, and is larger than the narrow portion 652 of the positioning engagement hole 65. The large-diameter head portion 552a is located on the tip side of the positioning member 55 and is the upper surface of a roughly disc-shaped screw with a larger outer diameter than the small-diameter head portion 552b. The maximum diameter of the large-diameter head portion 552a is smaller than the wide portion 651 of the positioning engagement hole 65 and larger than the narrow portion 652.

[0047] The positioning member 55, while fixed to the bottom surface of the shelf board 5, is inserted through the wide portion 651 of the positioning engagement hole 65, and the small-diameter head portion 552b is moved toward the narrow portion 652 of the positioning engagement hole 65. The small-diameter head portion 552b is located between the bottom surface of the shelf board 5 and the lower surface of the support surface portion 62 of the shelf board support member 6, and engages with the positioning engagement hole 65. The large-diameter head portion 552a has a larger diameter than the narrow portion 652 of the positioning engagement hole 65, preventing it from coming loose, thus determining the position of the shelf board support member 6 and the shelf board 5. The shelf board support member 6 is arranged along the depth direction of the frame unit 10, but even if it is connected to the vertical rail 2 on the back or front side, its position may shift in the left-right direction. If the shelf board support member 6 moves from side to side, it becomes difficult to determine the correct position for fixing the shelf board 5 on the shelf board support member 6. Therefore, the positioning member 55 protrudes downward from the shelf board 5, and by inserting the positioning member 55 into the positioning engagement hole 65, the positions of the shelf board 5 and the shelf board support member 6 can be easily determined. In addition, because the positioning engagement hole 65 has a roughly gourd shape with a wide portion 651 and a narrow portion 652, the positioning engagement hole 65 absorbs dimensional errors that occur during construction and assembly.

[0048] In the shelf support member 6A shown in Figure 9, the extension length of the locking piece 63's extension portion 66A and the extension length extending upward from the fixing piece 64 are long, so the position of the shelf 5 is lower than the locking groove 25. As a result, as shown in Figure 1, it is possible to narrow the pitch between adjacent shelves 5 in the vertical direction. In this way, by using a shelf fixing structure 400 in the frame housing 1 that has multiple shelf support members 6, 6A with different vertical dimensions of the extension portions 66, 66A, the vertical spacing between the shelves 5 can be changed.

[0049] In the shelf support member 6A shown in Figure 9, the extension length of the locking piece 63's extension portion 66A and the extension length extending upward from the fixing piece 64 are long, so the position of the shelf 5 is lower than the locking groove 25. As a result, as shown in Figure 1, it is possible to narrow the pitch between adjacent shelf boards 5 in the vertical direction. In this way, by using a shelf support member set 60 in the shelf fixing structure 400, which has multiple shelf support members 6, 6A with different vertical dimensions of the extension portions 66, 66A, the vertical spacing between shelf boards 5 can be changed.

[0050] Figures 10A and 10B show a reinforced shelf 5B with a reinforcing member 7. The reinforced shelf 5B is used when it is desired to prevent the shelf 5 from bending, for example, when heavy items such as a microwave oven are placed on it. The reinforced shelf 5B comprises a shelf body 50 and a reinforcing member 7.

[0051] The shelf board body 50 has a thin, roughly rectangular plate shape similar to the shelf board 5, and has a groove 51 formed on the back surface, which is one side of the shelf board body 50, extending in the longitudinal direction. As shown in Figure 10B, the groove 51 has a depth that does not reach the surface, which is the other side of the shelf board body 50. The groove 51 extends longitudinally from both ends in the longitudinal direction of the shelf board body 50, at a position inward by the width of the support surface portion 62 of the shelf board support member 6. The groove 51 is formed on the front side, for example, about 1 / 4 of the way along the short side of the shelf board body 50. By positioning the groove 51 to avoid the center in the short side, stress concentration can be avoided, and damage to the shelf board body 50 can be prevented.

[0052] The reinforcing material 7 is a metal plate inserted into the groove 51, and is formed by bending a single metal plate. The reinforcing material 7 has an insertion portion 73 and a pair of contact surface portions 70. As shown in Figure 10B, the insertion portion 73 is formed by folding the plate in a mountain fold and overlapping it in two layers. The insertion portion 73 is provided extending in the longitudinal direction of the reinforcing shelf 5B and is inserted into the groove 51. The height of the insertion portion 73 from the back surface of the shelf body 50 is configured to fit inside the groove 51.

[0053] Each of the pair of contact surfaces 70 has a first contact portion 71 and a second contact portion 72, which are both elongated, roughly rectangular, and planar. The first contact portion 71 and the second contact portion 72 are provided on both sides of the insertion portion 73, along the insertion portion 73. The pair of contact surfaces 70 abut against the back surface, which is one side of the shelf board body.

[0054] According to this embodiment, the following effects are achieved. The reinforcing shelf 5B is constructed to include a shelf body 50 having a groove 51 extending longitudinally on one of its surfaces, an insertion portion extending longitudinally and inserted into the groove 51, and a pair of planar contact surfaces provided along the insertion portion on both sides of the insertion portion and in contact with one surface of the shelf body. The insertion portion inserted into the groove and the pair of planar contact surfaces 70 on both sides of the insertion portion are arranged and in contact with the back surface of the shelf body 50, thus increasing the reinforced area. As a result, stress concentration can be avoided and the strength of the reinforcing shelf can be further improved.

[0055] In this embodiment, the insertion portion 73 is formed by bending a metal plate in half. By making the insertion portion 73 double-layered, its strength can be increased.

[0056] According to this embodiment, the reinforcing member 7 is constructed by bending a single sheet of metal. This makes it easy to install the reinforcing member 7 on the shelf board body 50.

[0057] This disclosure is not limited to the embodiments described above, and any modifications, improvements, etc., that can achieve the objectives of this disclosure are included. In the embodiments described above, the connecting fitting 4 was described as a flat plate-shaped member that connects the upper surfaces of the crossbars 3, but is not limited to this. Figure 11 shows another embodiment of the connecting fitting 4C that connects the crossbars 3 together. As shown in Figure 11, the connecting fitting 4C is inserted into the interior of the rectangular cylindrical crossbar 3 near its end. The connecting fitting 4C is formed in an I-shape in cross-section and has an elongated plate-shaped portion 401 along the crossbar 3 within the rectangular hollow portion of the crossbar 3, and an upper surface portion 402 and a lower surface portion 403 at the vertical ends of this plate-shaped portion, which have a thickness greater than the thickness of the plate-shaped portion 401. The connecting fitting 4 has a rectangular thick portion 404 at the part where adjacent crossbars 3 abut, which is not sized to fit inside the crossbar 3, and this thick portion 404 mimics the end caps of the crossbars 3 when they are connected together. By fastening screws through the connecting fitting 4C and each adjacent horizontal bar 3 so that they overlap and pass through the wall surface 200, the horizontal bars 3 are connected to each other and fixed to the wall surface 200.

[0058] Figure 12 shows examples of other shapes of frame units 10D. In the above embodiment, the example described was one in which shelves 5 and shelves 5A were placed on a frame assembled from vertical bars 2 and horizontal bars 3. However, it is not limited to this. For example, not only shelves 5, but also drawers 81, storage shelves 82, and a plate-shaped appliance slider 83 that allows appliances to be pulled out may be placed. As shown in Figure 12, the connecting unit 120D may be configured with different widths in the left and right directions as appropriate.

[0059] In the above embodiment, the frame unit 10 was described as a base unit 110 with connecting units 120 connected to it. However, if there is only one base unit 110, multiple connecting units 120 may be connected to each other. Even when connecting connecting units 120 to each other, the rear horizontal bars of one adjacent connecting unit and the rear horizontal bars of the other connecting unit can be connected on the rear side of a single vertical bar. The number and arrangement of the vertical bars 2 and horizontal bars 3 can be changed arbitrarily and are not particularly limited.

[0060] In the above embodiment, the unevenness adjustment structure 300 for fixing the horizontal bar 3 to the wall surface 200 was described, but the surface to be fixed does not have to be the wall surface 200, and the mounting member is not limited to those used in the frame housing 1, and does not have to be the horizontal bar 3. The unevenness adjustment structure is a widely used concept when attaching parts to a surface to be fixed.

[0061] In the above embodiment, the positioning engagement hole 65 of the shelf support member 6 was described as being gourd-shaped and formed near the approximate center in the depth direction. However, the position and shape of the positioning engagement hole 65 can be designed according to the type of shelf 5 and the installation location. The positioning engagement portion may be formed in the front or back corner of the shelf support member 6. Also, as used in the appliance slider 83 and the bottom drawer 81, the positioning engagement portion 65D does not have to be a through hole formed in the support surface portion 62. A part of the outer edge of the support surface portion 62 may be bent into a U-shape, and the positioning member 55 may be engaged with the U-shaped curved portion, or it may be formed by cutting out a part of the outer edge of the support surface portion 62.

[0062] In the above embodiment, the fixing piece 64 extending upward from the side portion 61 is fixed to the receiving member contact surface 23. However, the side portion 61 may be formed as a substantially rectangular shape without the fixing piece 64, and the end on the back side may be fixed with screws 64a. [Explanation of Symbols]

[0063] 7 Reinforcement material, 5B Reinforcement shelf board, 50 Shelf board body, 51 Groove section, 70 Pair of contact surfaces, 73 Insertion section

Claims

[Claim 1] A shelf board body having a groove formed on one side extending in the longitudinal direction, The reinforcing member comprises an insertion portion extending in the longitudinal direction and inserted into the groove, and a pair of planar contact surfaces provided along the insertion portion on both sides of the insertion portion and in contact with one surface of the shelf board body, The reinforcing material is formed by bending a single sheet of metal, The insertion portion is formed such that the metal plate material is folded in a mountain fold and overlapped in two layers. The groove portion is formed to a width that allows the opposing surfaces of the double-folded plate material to remain overlapping, thereby forming a reinforcing shelf.

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