JP4285191B2 - Tray mounting member - Google Patents

Description

  The present invention relates to a tray mounting member that enables a tray to be stored in a storage space.

  2. Description of the Related Art Conventionally, various storage furniture has been conceived in which a storage space is partitioned into a plurality of sections by arranging a shelf board or the like in a storage space formed in a furniture body. For example, there is a configuration in which a plurality of shelf mounting holes opposed to each other are formed on the left and right opposing walls of the furniture body, and a shelf board is attached using any one of the opposing shelf mounting holes. .

  On the other hand, there is storage furniture in which a plurality of trays are installed in the storage space and the trays are drawn out. As such, a plurality of rails extending in the depth direction are formed opposite to each other on the left and right opposing walls of the furniture body, and the protrusions provided on both side surfaces of the tray are engaged with the opposing rails. Thus, there is a configuration in which the tray is slidably installed in the depth direction.

In addition, as disclosed in Patent Document 1, there is also a storage furniture that intends to realize the above two functions by installing a tray unit including a bottom plate having a structure substantially similar to a shelf plate between left and right opposing walls. It is considered.
Japanese Utility Model Publication No. 2-127222

  Since the mounting structure is different between the shelf board and the tray as described above, a shelf mounting hole for attaching the shelf board is provided in order to switch between the use of the shelf board and the tray. Since the side plates and the side plates provided with rails for attaching the trays must be exchanged with each other, and these side plates are usually a single plate material, such an exchange requires a lot of labor and is optional. It is not possible to exchange only parts. For this reason, when purchasing storage furniture, the user is forced to make a choice about the usage of the storage furniture, or if necessary, must purchase both storage furniture.

  Therefore, such a situation can be avoided to some extent by using the storage furniture as in Patent Document 1, but the conventional tray unit is a box-shaped unit having a predetermined number of trays, The number is determined in advance by the size of the outer box of the tray unit. In such a case, it is not possible to attach only the necessary number of trays to the storage furniture, and the layout pattern of the storage furniture is limited. In order to increase the number of layout patterns, it is necessary to set a large number of tray units having different shapes and numbers of trays to be stored, and to prepare as many outer boxes as there are types. In such a case, the number of varieties constituting the lively storage furniture increases.

  The present invention pays attention to such inconveniences, and the intended object of the present invention is to install a tray in a storage space such as a shelf so that the tray can be selected at an arbitrary position. The layout performance is to be improved.

The present invention made in order to solve the above-mentioned problems is a plate-like thing used for an open storage space, and is detachably attached to an upright surface in the storage space on one plate surface, and the other plate A tray mounting member on the premise of having a rail extending in the depth direction of the storage space on the surface is provided.

  If this is the case, the tray can be filled even in a storage space that does not have rails in advance by appropriately attaching the tray mounting member to the elevation in the storage space. Can be improved. In addition, since the outer box that matches the shape and number of trays is not required like the conventional tray unit, the tray can be freely arranged without being limited by the position and size of the outer box, If only the tray mounting member is prepared, various layout patterns can be realized without increasing the number of types of storage furniture.

  As a specific embodiment of the tray mounting member according to the present invention, one of the plate surfaces has an engaging portion that can be engaged with a shelf mounting hole for mounting the shelf plate in the storage space. . If this is the case, it is possible to select whether to install a shelf board or a tray in the storage space using the shelf mounting hole, so that it is possible to store without any additional processing for mounting the tray unit. Variations in layout in the space can be improved.

  Further, when the rails are provided on the other plate surface in a plurality of stages, it is preferable that the rails are configured so that the distance between the rails is equal to the distance between the shelf mounting holes. In such a case, if the trays are arranged according to the intervals between the plurality of rails, the trays can be arranged based on the intervals between the shelf mounting holes, so the shelf plates and the trays are mixed in the storage space. It is possible to arrange them even in a regular state. By doing so, the design effect can be improved and the storage efficiency of the storage space can be increased.

Tray mounting member according to the present invention is characterized in der Rukoto having a fracture inducing portion that can be divided in a direction parallel to the rails. If it is such, it can also be set as a tray attachment member with few rails by dividing | segmenting in the location of a fracture | rupture induction | guidance | derivation part. By doing so, the degree of freedom in mixing the tray and the shelf board in the storage space is increased, so that variations in layout can be further improved. Further, the breakage inducing portion may be provided at a position where it can be divided in units of rails. If this is the case, the number of rails that the tray mounting member can have can be changed in increments of one, and rails can be provided only at the locations where the trays are to be mounted, allowing for further variations in layout. It becomes.

  And in order to reduce production cost, it is desirable that the tray mounting member according to the present invention is integrally formed of resin.

  According to the present invention, in a storage space such as a shelf, it is possible to attach a tray without performing processing for separately attaching a tray unit, and to install a shelf board and a tray so that they can be selected at an arbitrary location. Therefore, variations in layout in the storage space can be improved. In addition, since the outer box that matches the shape and number of trays is not required like the conventional tray unit, the tray can be freely arranged without being limited by the position and size of the outer box, Various layout patterns can be realized without increasing the number of types of storage furniture.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the storage furniture 1 according to the present embodiment includes a storage furniture body 10 having a storage space S opened on the front surface, a shelf board P that partitions the storage space S in the vertical direction, and a storage space S. And a vertical partition 2 that partitions the storage space S in the vertical direction and the width direction using the shelf plate P and the vertical partition 2 to form a plurality of shelf spaces. is there. In this embodiment, the storage furniture main body 10, the shelf board P, and the vertical partition 2 are each formed by bending a metal plate.

  In the storage furniture 1 according to this embodiment, trays 41, 42, 43, and 44 having different widths and depths (heights) are arranged in the storage space S, respectively.

  The storage furniture body 10 includes a top plate 11 positioned on the upper side, a bottom plate 12 positioned on the lower side, a pair of side plates 13 and 14 standing on both sides, and a back plate 15 that closes the rear of the storage furniture 1. .

  The top plate 11 located at the upper end of the storage space S is connected to a pair of side plates 13 and 14 at both ends and to a back plate 15 at the rear end. The top surface of the top plate 11 bears a design element as a flat decorative surface as shown in FIG. 1, and the lower side surface (not shown) is divided into a part that divides the storage space S into two parts and a part that divides the storage space S into three parts. The vertical partitions 2 and 20 described later can be connected.

  The bottom plate 12 positioned at the lower end of the storage space S has a pair of side plates 13 and 14 erected from both side ends and a rear end connected to the back plate 15. Further, on the upper surface of the bottom plate 12, circular half punches hp are provided at two locations near the front end and near the rear end, respectively, at a location where the storage space S is equally divided into two and a portion where the storage space S is equally divided into three.

  The pair of side plates 13 and 14 are erected substantially symmetrically with the upper end connected to the top plate 11, the lower end connected to the bottom plate 12, and the rear end connected to the back plate 15, respectively. As the decorative surface, the shelf mounting holes h for mounting the shelf boards P are provided on the inner surface facing the storage space S.

  The shelf attachment hole h is a slit-like hole extending in the front-rear direction provided at two positions at the back and front of the elevation surface at the same height, and both ends of the hole are processed in a semicircular shape. The shelf mounting holes h are arranged at a predetermined pitch from the vicinity of the upper ends of the side plates 13 and 14 to the vicinity of the lower ends thereof. In this embodiment, the pitch width is set to 23.4 mm, and the positions of the shelf mounting holes h are set so that the phases of the side plates 13 and 14 are equal.

  The back plate 15 is connected to the rear end of the top plate 11, the bottom plate 12, and the pair of side plates 13 and 14, thereby closing the back surface of the storage space S and improving the strength of the storage furniture 1 as a whole.

  Moreover, the storage furniture 1 of this embodiment can provide the shelf board P which partitions off the full width of the storage space S by constructing between a pair of side plates 13 and 14, and is shown to FIG. 2 (A). As described above, by installing between one of the pair of side plates 13 and 14 and the vertical partition 20 described later, shelf plates P1, P2, and P3 that partition the storage space S defined between them can be provided. I am doing so.

  The shelf plate P that partitions the entire width of the storage space S has a circular shape at a position that divides the space into two equal parts and a part that divides the space into three equal parts so that the vertical partition 2 can be attached to the upper surface in the same manner as the bottom plate 12 described above. Half punches hp are provided at two positions, front and rear.

  In FIG. 2A, a shelf board P1 and a shelf board P3 are installed between the side plates 13 and 14 and a vertical partition 20 to be described later, and the position of the vertical partition 20 is changed to indicate by a broken line. It is also possible to attach shelf boards P2 having different width dimensions. These shelf plates P1, P2, and P3 are not provided with the half punch hp like the above-described shelf plate P, but other basic structures are the same as those of the above-described shelf plate P.

  In addition, as an aspect which attaches each shelf board P, P1, P2, P3 mentioned above to the shelf attachment hole h, the shelf nail | claw Q which is a metal board | plate material shown to FIG. 2 (B) is used, FIG.2 (C). The upper part q1 is inserted into the shelf mounting hole h, and the shelf board shown in FIG. 2D (shelf board P3 in the figure) is placed at the position of the lower part q2 protruding in the horizontal direction from the shelf attachment hole h. It is assumed that the shelf plate P3 is placed with the positions of the cuts p provided on the side edges of the plate. Thus, not only can the shelf board P3 be installed at an appropriate position by providing the cuts p on the side edges of the shelf board P3, but the cuts p prevent the shelf board P3 from moving back and forth. It plays a role as a stopper.

  The vertical partition 2 in FIG. 1 can be arranged to partition the storage space S, which is divided into three equal parts in the vertical direction by the shelf board P, in the width direction. Further, the vertical partition 20 in FIG. 2A can be arranged to partition the entire length from the top plate 11 to the bottom plate 12 of the storage space S in the width direction. The same shelf mounting holes h as the side plates 13 and 14 are provided on both side surfaces of the vertical partitions 2 and 20. Further, the shelf mounting holes h provided in the vertical partitions 2 and 20 are provided at the same pitch as that of the side plates 13 and 14 in the vertical direction, and are provided on the opposite surfaces when attached to the storage space S. The position is set so that the phase is equal to the shelf mounting hole h.

  The trays 41, 42, 43, 44 function as so-called drawers having end plates 410, 420, 430, 440 on the front and openings on the top. The trays 41, 42, and 43 substantially correspond to the width dimension of the shelf space R obtained by dividing the storage space S into three equal parts, and substantially correspond to the effective height dimensions that are twice, four times, and six times the predetermined pitch, respectively. The tray 44 substantially corresponds to the width of two-thirds of the storage space S and substantially corresponds to the effective height of twice the predetermined pitch. Further, from the side surfaces of the trays 41, 42, 43, and 44, two protrusions t1 and t2 that respectively extend in the depth direction and are parallel to each other in the vertical direction protrude (FIG. 6).

  In the present embodiment, the tray 41, 42, 43, or 44 is installed at the place where the shelf mounting hole h is provided, so that the tray mounting members 3a and 3b are attached to the storage furniture 1 as described above. I am doing so. The tray attachment members 3a and 3b are a pair of left and right symmetrical plate-like members, and can be arranged by attaching to the side plates 13 and 14 and the vertical partitions 2 and 20 each having a shelf attachment hole h. The tray mounting members 3a and 3b are integrally formed of resin in order to enable production at a low cost.

  Further, in the tray mounting members 3a and 3b, one plate surface contacting the side plates 13 and 14 and the vertical partitions 2 and 20 is set as the contact surfaces 31a and 31b, and the other plate surface is set as the rail surfaces 33a and 33b. The contact surface 31a of the tray mounting member 3a is attached to the right side of the side plate 13 and the vertical partitions 2 and 20, and the contact surface 31b of the tray mounting member 3b is attached to the left side of the side plate 14 and the vertical partitions 2 and 20. It is for contact.

  For this reason, as shown in FIG. 3, engaging portions 32a and 32b project from locations corresponding to the shelf mounting holes h of the contact surfaces 31a and 31b. The shape of the engaging portions 32a and 32b is such that the tip portion extends from the rising portion in the depth direction so as to be closely engaged with the shelf mounting hole h by being inserted into the shelf mounting hole h and sliding. It has a shape, and is formed as a sandwiching portion x that sandwiches the plate members s constituting the side plates 13 and 14 and the vertical partitions 2 and 20 through a gap between the tip portion and the contact surfaces 31a and 31b. In this embodiment, the gap of the clamping part x is set to 0.6 mm, and the effective depth is set to about 5 mm (FIG. 6).

  On the other hand, the rail surfaces 33a and 33b are provided with a plurality of rails 34a and 34b extending over almost the entire width in the depth direction. The rails 34a and 34b are protrusions having a fixed protrusion height, and the tray stoppers 35a and 35b are formed by causing the protrusions to protrude higher on the front end side.

  The engaging portions 32a and 32b and the rails 34a and 34b are provided at a pitch of 23.4 mm, similar to the pitch at which the shelf mounting holes h are provided in the vertical direction.

  Next, a mode in which the tray attachment members 3a and 3b are attached to the storage space S will be described with reference to FIGS.

  First, FIG. 4 illustrates a mode in which the tray attachment members 3a and 3b are attached to the storage space S partitioned in the vertical direction and the width direction on the storage furniture body 10 by using the shelf board P and the vertical partition 2. In this way, the tray mounting members 3 a and 3 b are carried in from the front surface of the storage space S, and the tray mounting member 3 a is attached to the right side surface of the vertical partition 2 and the tray mounting member 3 b is attached to the left side surface of the side plate 14.

  FIG. 5 shows the principle that the engaging portion 32a is fixed to the plate material s using the shelf mounting hole h. This figure is a schematic cross-sectional view in the vicinity of the tray stopper 35a located at the front end of the rail 34a. First, the engaging portions 32a are positioned in the vicinity of the shelf mounting holes h (FIG. 5A), and the engaging portions 32a are inserted into the shelf mounting holes h (FIG. 5B). And it slides to the back until the end point x1 of the clamping part x contact | abuts to the board | plate material s (FIG.5 (C)). At this position, the clamping portion x securely clamps the plate material s, so that the tray mounting member 3a is securely fixed to the plate material s.

  Next, a mode in which the tray 41 is attached to the tray attaching members 3a and 3b will be described with reference to FIG. This figure is a schematic sectional view of the vicinity of the rail 34a in the mounted state. The vicinity of the rail 34b is symmetrical to that of FIG. 6 and, of course, the same applies to the case where other trays 42, 43 or 44 are stored.

  First, in a state where the pair of tray attaching members 3a and 3b are attached as described above, the tray 41 is put into a space between the rail surfaces 33a and 33b. Here, as shown in FIG. 6, since the outer dimensions of the upper and lower two protrusions t1 and t2 of the tray 41 are set slightly smaller than the inner dimension between the rails 34a and 34a, the upper and lower two protrusions t1. , T2 is sandwiched between the upper and lower rails 34a, 34a, whereby the tray 41 is restricted in the vertical direction and can slide in the depth direction. At this time, of the protrusions t1 and t2 of the tray 41, only the lower protrusion t2 supports the tray 41. However, when the tray 41 is moved, the upper protrusion t1 becomes the upper rail 34a. If necessary, the vertical movement of the tray 41 is restricted, and rattling during sliding movement is suppressed. Further, when the tray stopper 35a comes into contact with the end plate 410 of the tray 41, the tray 41 is not mistakenly moved too far and the tray 41 is positioned. By doing so, even in the state where a plurality of trays 41 are arranged, the front end surface of the end plate 410 is flush with the front and back, so that the design effect as a tray unit can be maintained.

  Further, the sliding force of the tray mounting members 3a and 3b with respect to the plate material s slightly acts due to the friction between the tray mounting members 3a and 3b and the tray 41 accompanying the sliding of the tray 41. Therefore, the frictional force is slightly applied in the direction in which the clamping part x and the plate material s are separated from each other. However, the tray mounting members 3a and 3b have the clamping force of the clamping part x and the plate material s and the contact surfaces 31a and 31b. Since the tray 41 slides smoothly along the rails 34a and 34b, the friction force applied by the tray 41 to the tray mounting members 3a and 3b is relatively small. Yes, the frictional force does not cause the tray mounting members 3a and 3b to slide out of the shelf mounting hole h. This is especially true with other trays 41, 42 or 43 attached.

  Next, a layout pattern of the storage space S configured in the storage furniture 1 according to this embodiment will be described.

  As shown in FIG. 1, the storage furniture 1 according to the present embodiment can constitute a layout in which a storage space S is defined by first installing a shelf board P and attaching a vertical partition 2. As shown in FIG. 2 (A), it is also possible to construct a layout in which the storage space S is defined by first attaching the full length vertical partition 20 and then installing the shelves P1, P2 or P3. is there. In the storage space S partitioned by the vertical partitions 2 and 20, trays 41, 42, 43, and 44 are attached, respectively.

  And the other layout pattern of the storage furniture 1 is illustrated in FIGS. As shown in FIGS. 7 to 9, even if the trays 41, 42, 43, and 44 and the shelves P, P1, P2, and P3 are rearranged appropriately, they can be arranged without generating a useless gap space in the vertical direction. it can. This is because the rails 34a, 34b of the tray mounting members 3a, 3b are provided at the same pitch as that of the shelf mounting holes h in the vertical direction, and the effective height dimension of the storage space S and the trays 41, 42, 43, 44. This is because the height dimension is set based on the multiple of the pitch. Here, “based on” means not only indicating those dimensions, but also including dimensions that take into account design convenience. For example, the height dimensions of the trays 41, 42, 43, and 44 are set by subtracting the gap dimension from the multiple dimension of the predetermined pitch, and such a dimension is also “based on” the multiple dimension of the predetermined pitch. Yes. Further, by setting the trays 41, 42, 43, 44 and the shelf boards P, P1, P2, P3 to desired height positions, various layouts other than those shown in FIGS. Is possible. Furthermore, it is possible to fill the entire surface of the storage space S with the trays 41, 42 and 43 as shown in FIG.

With the above configuration, the tray mounting members 3a and 3b according to the present embodiment fill the trays 41, 42, 43, or 44 even in the storage space S that does not include the rails 34a and 34b in advance. Therefore, variations in the layout of the storage space S can be improved. Further, since an outer box matching the shape and number of the tray trays 41, 42, 43, or 44 like the conventional tray unit is not required, the trays 41, 42 are not limited by the position / size of the outer box. , 43 or 44 can be freely arranged in the storage space S, and if only the tray mounting members 3a and 3b according to this embodiment are prepared, various layouts can be made without increasing the number of varieties constituting the storage furniture 1. A pattern can be realized.

  Further, as a specific configuration of the tray mounting members 3a and 3b according to the present embodiment, the contact surfaces 31a and 31b, which are one plate surface, are used for mounting the shelf plates P, P1, P2 or P3 in the storage space S. Engaging portions 32a and 32b that can be engaged with the shelf mounting holes h. By doing so, it is possible to select whether the shelf plates P, P1, P2, or P3 or the trays 41, 42, 43, or 44 are attached in the storage space S using the shelf attachment holes h, The variation of the layout in the storage space S can be improved without processing for attaching the tray unit separately.

  Furthermore, the tray mounting members 3a and 3b according to the present embodiment have rails 34a and 34b in a plurality of stages on the rail surfaces 33a and 33b, which are the other plate surfaces, and the interval between the rails 34a and 34b is the shelf mounting. It is assumed that the distance between the holes h is equal. If it is such, since tray 41, 42, 43, or 44 can be arrange | positioned based on the space | interval of shelf attachment holes h, shelf board P, P1, P2, or P3 in storage space S and Even in a state where the trays 41, 42, 43, or 44 are mixed, it is possible to arrange them regularly without creating a useless space, improving the design effect and increasing the storage efficiency of the storage space S.

  In addition to the above, the present invention can be variously modified.

  For example, a tray mounting member 3c according to another embodiment of the present invention is shown in FIG. The basic configuration of the tray mounting member 3c is substantially the same as that of the tray mounting members 3a and 3b in the above embodiment, but the groove-shaped breakage inducing portion 36 is provided in a direction parallel to the rail 34c, and the tray mounting member 3c is provided. Can be appropriately divided. The breakage inducing portions 36 are provided at a 23.4 mm pitch, like the rails 34c, and can be divided for each rail 34c.

    If it is such, for example, even if the vertical dimension of the storage space S divided up and down is shorter than the tray mounting member c, it can be appropriately broken and attached at the position of the breakage inducing portion 36, The degree of freedom of laying out the trays 41, 42, 43, or 44 and the shelf boards P, P1, P2, or P3 in the storage space S can be improved. Further, since the breakage inducing portions 36 are provided at the same pitch as the shelf mounting holes h and the rails 34c, the number of steps of the rails 34c can be changed by one unit. If this is the case, for example, it is possible to provide the rail 34c only at the place to be attached, including the case where only one tray 41, 42, 43 or 44 is to be attached. Will be further expanded.

  A tray mounting member 3d according to still another embodiment is shown in FIGS. The basic configuration of the tray mounting member 3d is substantially the same as that of the tray mounting members 3a and 3b. However, tray stoppers 35d are provided at both ends of the rail 34d (FIG. 12), and the engaging surface 31d has an engaging portion. 32d protrudes (FIG. 13A). The engaging portion 32d has a hook shape with the tip portion extending downward from the rising portion, and the side plates 13 and 14 and the vertical partitions 2 and 20 are formed by a gap between the tip portion and the contact surfaces 31a and 31b. The clamping member x2 is configured to clamp the plate material s constituting the. The principle that the engaging portion 32d is fixed to the plate member s using the shelf mounting hole h is the same as that of the engaging portions 32a and 32b described above except that the sliding direction is the lower side (FIG. 13 ( B) to FIG. 13 (D)).

  In such a case, since the tray stopper 35d is positioned on the front side regardless of whether the tray attachment member 3d is attached in the left or right direction, the side plates 13, 14 and The vertical partitions 2 and 20 can be attached to both elevations in common.

  The present invention is not limited to the above embodiment. For example, by adjusting the position of the engaging part and the rail, it is possible to create a tray mounting member that can mount the rail without shifting the phase or disturbing the pitch regardless of the vertical direction of mounting. Is possible.

  In addition, the specific configuration of each part, such as the dimensions of a predetermined pitch, the shape of a shelf claw, and the shape of a notch provided on a shelf board, is not limited to the above embodiment, and may be variously within the scope of the present invention. Deformation is possible.

The perspective view which shows the storage furniture to which the tray attachment member which concerns on embodiment of this invention is applied. The perspective view which shows the storage furniture in another layout pattern. The perspective view which shows the shelf nail | claw which concerns on the same embodiment. Sectional drawing which shows the attachment aspect of the shelf board which concerns on the same embodiment. The schematic diagram which shows the shelf board which concerns on the same embodiment. The perspective view which shows the tray attachment member which concerns on the same embodiment. The perspective view which shows the attachment procedure of the tray attachment member which concerns on the same embodiment. Typical sectional drawing which shows the attachment procedure of the tray attachment member which concerns on the same embodiment. Typical sectional drawing which shows the attachment procedure of the tray attachment member which concerns on the same embodiment. The schematic diagram which shows the layout pattern of the storage furniture which concerns on the same embodiment. The schematic diagram which shows the layout pattern of the storage furniture which concerns on the same embodiment. The schematic diagram which shows the layout pattern of the storage furniture which concerns on the same embodiment. The schematic diagram which shows the layout pattern of the storage furniture which concerns on the same embodiment. The perspective view which shows the tray attachment member which concerns on other embodiment of this invention. The perspective view which shows the tray attachment member which concerns on further another embodiment of this invention. The schematic diagram which shows the attachment procedure of the tray attachment member which concerns on the same embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Storage furniture 10 ... Storage furniture main body 11 ... Top plate 12 ... Bottom plate 13, 14 ... Side plate 2, 20 ... Vertical partition 3a, 3b, 3c, 3d ... Tray attachment member 31a, 31b ... Accessing surface 32a, 32b, 32d ... Engagement part 33a, 33b ... Rail surface 34a, 34b, 34c, 34d ... Rail 35a, 35b, 35d ... Tray stop 36 ... Breaking induction part 41, 42, 43, 44 ... Tray 410, 420, 430, 440 ... End plate S ... Storage space P, P1, P2, P3 ... Shelf plate h ... Shelf mounting hole

Claims (5)

A rail that is used in an open storage space, one plate surface is detachably attached to a vertical surface in the storage space, and the other plate surface extends in the depth direction of the storage space; and a rail A tray mounting member, comprising: a breakage inducing portion that can be divided in a direction parallel to the direction . The tray attachment member according to claim 1, wherein the breakage inducing portion is provided at a position where the breakage inducing portion can be divided in units of rails . The tray attachment member according to claim 1 or 2, further comprising an engaging portion that is engageable with a shelf attachment hole that opens to an elevation surface of the storage space on one plate surface . The tray mounting member according to claim 3, wherein the rail is provided in a plurality of stages on the other plate surface, and the interval between the rails is equal to the interval between the shelf mounting holes . The tray attachment member according to any one of claims 1 to 4, wherein the tray attachment member is integrally formed of resin .

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