JP2000342351A - Adjustable shelf-height shelving - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide adjustable shelf-height shelving that allows easy adjustments to the shelf pitch such that it is smaller than the pitch of locking holes cut in the posts and that improves the storage efficiency. SOLUTION: A plurality of coupling rails 6 are extended between adjoining posts at vertically adjusted intervals, so that two of them at the same level form a shelf. Each post has a plurality of locking holes cut at vertically constant pitches (p). Each coupling rail 6 is shaped vertically symmetrically, and is fixedly mounted at ends with locking fittings 15 placed in symmetric relation along the posts. Each locking fitting 15 has an upper-lower pair of pins 16 interspaced by an integral multiple of the pitch (p) and projected to fit into the locking holes in the post. Each coupling rail 6 is fastened to the right and left locking fittings 15 with its middle in height upwardly out of line with the middle point between the upper and lower pins 16 by quarter the pitch (p). Installing the coupling rails 6 upside down changes the shelf height at half the pitch (p).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shelf capable of adjusting the height of a shelf.

[0002]

2. Description of the Related Art In an assembly shelf or the like in which the height of a shelf can be adjusted,
The horizontal rail connecting the shelf columns forms a shelf, and the horizontal rail is erected by engaging locking metal fittings fixed to both ends to left and right columns.

[0003] In general, a pillar is provided with a locking hole at a predetermined pitch in the height direction, and a pin corresponding to the locking hole is protruded from the locking metal, and the pin is inserted into the locking hole. By locking, the locking fitting is supported by the column, and the horizontal rail is horizontally installed between the left and right columns via the supported left and right locking metal. The step pitch (pitch of the shelf step) can be changed by locking the pin of the locking fitting to another locking hole of the column.

[0004]

In recent years, there has been a demand for shelf-height-adjustable shelves with good space efficiency. For this reason, there has been a demand for an assembly shelf which can set a finer step pitch and has excellent storage efficiency. However, in the conventional shelf height adjusting shelf, the locking holes are formed in the pillar at a predetermined pitch in the height direction, and the shelf pitch can be changed only at the pitch interval.

[0005] If the pitch of the locking holes is reduced, the step pitch can be finely set. However, since the locking holes are drilled in a predetermined size in the height direction, the pitch can be reduced to reduce the distance between the upper and lower locking holes. Becomes small, and it is not possible to obtain sufficient strength of the locking hole for locking the pin of the locking fitting on which the load of the stored article is applied.

[0006] Therefore, when the support is standardized and used, the pitch of the locking holes formed in the support has a minimum limit, and the step pitch cannot be adjusted more finely.

[0007] Further, when changing the article to be stored, even if an attempt is made to adjust the step pitch in accordance with the article to be newly stored, the height can only be adjusted at the pitch interval of the locking holes of the column, It may not be possible to increase the storage efficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to easily adjust a step pitch at an interval equal to or less than a pitch of a locking hole formed in a support, and Another object of the present invention is to provide a shelf height adjusting shelf capable of improving efficiency.

[0009]

In order to achieve the above-mentioned object, the present invention provides a method according to the present invention, in which a plurality of connecting bars are installed between adjacent columns with their heights adjusted in the height direction, and the same height is set. In a shelf height adjustment shelf in which each shelf is constituted by a plurality of bridges connected, a plurality of locking holes are formed at a predetermined pitch p in the height direction, and the connection bar has a vertically symmetric shape. Then, locking metal fittings along the column are fixed symmetrically at both ends, and a pair of upper and lower pins separated by an integral multiple of the pitch p can be locked to the locking holes of the column on the locking metal. The connecting bar is fixedly displaced vertically by p / 4 from the center point of the upper and lower pins with respect to the left and right locking members, and the connecting bar is used upside down to p / 2. A shelf height adjustment shelf that can adjust the height of the shelf at intervals.

Since the vertically symmetrical connecting bar is fixed to the left and right locking fittings by being shifted vertically by p / 4 from the center point of the upper and lower pins, the connecting bar is turned upside down and the same When the connecting bar is erected by locking the pin of the locking fitting in the locking hole, the height of the upper surface (shelf surface) of the connecting bar can be changed by p / 2. That is, even if the pitch of the locking holes of the pillar is p, if the connecting bar is erected including upside down use,
The height of the shelf surface can be adjusted at p / 2 intervals.

[0011] The height of the shelf surface can be adjusted at an interval of half of the minimum pitch of the locking holes formed in the support columns, and the storage efficiency can be improved by finer height adjustment. Can be. Also, when changing the storage items,
The step pitch can be finely adjusted to be equal to or less than the pitch interval of the locking holes of the pillars according to the article to be newly stored, and the storage efficiency can be increased using the existing shelf.

According to a second aspect of the present invention, a column frame in which a pair of front and rear columns are connected by a connecting member is arranged in the left-right direction so as to face each other, and a plurality of horizontal bars are provided between the columns adjacent in the left-right direction in the height direction. In a shelf-height-adjustment shelf, which is an assembled shelf constructed by a pair of horizontal rails erected at the same height in the front and rear directions, the support posts have locking holes at a predetermined pitch p in the height direction. A plurality of the horizontal rails are vertically symmetrical, and locking members along the right and left columns are fixed symmetrically at both ends, and the locking members are vertically spaced apart by an integral multiple of the pitch p. A pair of pins are projected from the locking holes of the column so as to be lockable, and the horizontal rail is fixed to the left and right locking fittings by being displaced vertically by p / 4 from a center point of the upper and lower pins. And the height of the shelf can be adjusted at p / 2 intervals by using the horizontal rail upside down. Was the height adjustment shelf.

[0013] When the horizontal rails having a vertically symmetric shape are turned upside down and the pins of the locking fittings are locked in the same locking holes of the columns, and the horizontal rails are erected, the upper surface (shelf surface) of the horizontal rails is p / 2. Height can be changed, and even if the pitch of the locking holes of the columns is p, the height of the shelf surface can be adjusted at p / 2 intervals by assembling the horizontal rail including upside down use. It can be a shelf.

[0014] The height of the shelf surface can be adjusted at an interval of half of the minimum pitch of the locking holes formed in the column, and the storage efficiency is improved by finer height adjustment. In addition, when changing the stored articles, the step pitch can be finely adjusted to be equal to or less than the pitch interval of the locking holes of the pillars according to the article to be newly stored,
The storage efficiency can be improved by using the existing assembly shelves.

According to a third aspect of the present invention, in the shelf adjusting shelf according to the second aspect, a plurality of vertical rails are detachably mounted in a left-right direction between a pair of front and rear horizontal rails constituting the shelf. Features.

Since the horizontal rail itself has a vertically symmetric shape, the vertical rail can be detachably installed even if the horizontal rail is used upside down. Regardless of the size of the stored articles, the vertical rail can reliably store and support the articles.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a pallet rack 1 which is a shelf adjustment shelf according to the present embodiment.

A pair of front and rear columns 3, 3 are connected by a brace 4 as a connecting member and a horizontal member 5 extending in three steps to form a column frame 2. The column frames 2, 2 are opposed to each other left and right. Between the front supports 3, 3 adjacent to each other in the left-right direction and the rear supports 3, 3
Three horizontal rails 6 are installed horizontally at intervals in the height direction.

Each of the horizontal rails 6 and 6 installed at the same height in the front and rear forms a shelf 7, and four vertical rails 8 are installed at predetermined positions between the horizontal rails 6 and 6 of each shelf 7. . The number and height of the shelf 7 and the number and position of the vertical rails 8 can be changed depending on the size of the pallet 9 and the load to be stored.

As shown in FIGS. 2 and 3, the column 3 is a long channel-like member having a rectangular shape formed by an outer wall 3a, left and right side walls 3b, 3b, and an inner wall 3c having an opening in a top view. A plurality of locking holes 10 are formed in the outer wall 3a at a predetermined pitch p in the height direction, and are arranged in two rows side by side.

The locking hole 10 has a special shape that tapers downward from the uppermost hole. Such a support 3
A seat plate 11 is attached to the lower end of the support 3, and the column 3 is erected through the seat plate 11.

An inner wall 3c having an opening is opposed to the other, and two columns 3, 3 are arranged in front and rear. A bracket 12 having a base end fixed to the inner wall 3c and protruding inward is provided with a brace 4 and a horizontal member 5 on a bracket 12. The ends are jointly fastened with bolts and nuts 13 (see FIG. 12), and the columns 3 are connected to form the column frame 2.

On the other hand, as shown in FIGS. 4 to 9, the cross rail 6 is made of a steel material having a substantially Σ-shaped cross section and a vertically symmetrical shape. A vertical outer wall 6c, 6c having a flat bent portion via the upper and lower inclined walls 6b, 6b forms a central vertical outer wall 6a, and upper and lower horizontal walls 6d, 6d bent from the vertical outer walls 6c, 6c are slightly stepped. A vertical inner wall 6e, 6e is formed by bending the end portion in a direction approaching each other (see FIG. 9).

The vertical walls 6e, 6e extend from the horizontal walls 6d, 6d.
A plurality of cuts 6f are formed in the upper and lower bent portions in the horizontal direction at a width interval of the vertical bar 8, and the horizontal bar 6 including the cuts 6f has a vertically symmetric shape.

Elongated locking metal members 15 are integrally welded to both ends of the horizontal rail 6 in the vertical direction. The latch 15 is formed by bending a rectangular steel plate into an L-shape, and welding the side wall 15 to the cross rail 6.
b and the outer wall 15a which is the front and rear outer side, the left and right width of the outer wall 15a is less than half of the left and right width of the column 3, and the outer wall 15a is provided with four circular holes 15c in a vertical line. The distance between the upper and lower two circular holes 15c is 4p, which is four times the pitch p of the locking holes 10 of the column 3 (see FIGS. 7 and 9).

When the corners of the outer wall 15a and the side wall 15b of the latch 15 are aligned with the corners of the outer wall 3a and the side wall 3b of the support 3 and are adjusted by sliding up and down, two circular holes 15c and 15c are formed. Can be aligned with the two locking holes 10, 10 four apart above and below the column 3. The locking pins 16, 16 are fitted into the upper and lower two circular holes 15c, 15c.

As shown in FIG. 8, the locking pin 16 is formed in the order of an oblong head 16a having a long diameter in the left-right direction, a cylindrical locking portion 16b having a short diameter as an outer diameter, and a small diameter portion 16c. The small-diameter portion 16c is penetrated from the inside into a predetermined circular hole 15c of the locking metal fitting 15, and a portion protruding outward is caulked to form the head 16a.
Then, the column locking portion 16 b is projected inward to fix the locking pin 16 to the locking fitting 15.

The locking hole 10 on the side of the column 3 has a special shape as described above, and the head 16a of the locking pin 16 penetrates the uppermost portion of the locking hole 10 which is the largest hole. By slightly lowering the metal fitting 15 together with the locking pin 16, the cylindrical locking portion 16b is locked so as to bite into the tapered portion below the locking hole 10.

Although the locking metal 15 is welded to both ends of the horizontal bar 6, the horizontal bar 6 is not fixed to the locking metal 15 at the center in the vertical direction. As shown in the figure, p is raised above the height M of the center point of the upper and lower locking pins 16,16.
It is fixed at a position shifted by / 4. Left and right locking brackets 16, 16
Are fixed symmetrically.

As described above, the horizontal rail 6 to which the locking fittings 15 and 15 are fixed on the left and right is erected on the left and right columns 3 and 3 via the locking fittings 15 and 15. At that time, the upper and lower locking pins 16,
The locking holes 10 and 10 in which the lock 16 is locked are selected, the locking fitting 15 is locked, and the horizontal rail 6 is erected at the required height.

The second circular hole 15c from the bottom of the latch 15
A retaining pin 17 having a shape bent downward from the head is inserted into the locking hole 10 of the column 3 corresponding to the above, so that when an upward force is applied to the locking metal 15, the locking metal is used. The movement of the locking pin 16 from the locking hole 10 can be prevented by restricting the upward movement of the locking pin 16.

In this embodiment, as shown in FIG. 1, the horizontal rails 6 are erected in three stages, and the vertical rails 8 are located between the corresponding front and rear horizontal rails 6 at the same height. It will be erected. As shown in FIGS. 10 and 11, the vertical rail 8 is a long member before and after the cross section of which is substantially U-shaped, and has left and right side walls 8b, 8b bent on both sides of the upper wall 8a. Engagement claw portions 8c, 8c are formed by cuts that enter upward from the lower end. The lower ends of the other left and right side walls 8b, 8b are bent inward.

The front and rear engaging claws 8c and 8c of the vertical bar 8 are fitted into required cuts 6f and 6f of the front and rear horizontal bars 6 and 6 from above, and the vertical bar 8 is constructed. Four vertical rails 8 are erected on each shelf 7 at required left and right positions. The horizontal wall 6d of the horizontal rail 6 has a stepped portion, and the upper wall 8a of the vertical rail 8 has an end on a lower part thereof, and the upper surface of the horizontal rail 3 and the upper surface of the vertical rail 8 are substantially flush. And the shelf surface of the shelf 7.

Thus, the pallet rack 1 is assembled. 13 and 14, when the horizontal rail 6 is erected in the posture shown by the solid line, the height of the shelf 7 is adjusted by the pitch p of the locking hole 10.
When the horizontal rail 6 is used upside down, the locking pin 16 is locked in the same locking hole 10 to support the locking hardware 15. As shown by a two-dot chain line in FIGS. 13 and 14,
The height of the shelf 7 is lower by p / 2.

That is, when the assembling shelf 1 is assembled including the use of the horizontal rail 6 upside down, the height of the shelf 7 can be adjusted by the locking hole 10.
Can be finely adjusted at an interval of p / 2, which is a half of the pitch p. Therefore, it is possible to set the height of the shelf 7 most suitable for the stored articles, and increase the possibility of increasing the number of shelves and improving the storage efficiency.

In the case of a standardized assembly shelf, the minimum pitch p of the locking holes formed in the support column is 50 mm, and a pitch smaller than this is impossible in terms of strength. For this reason, the conventional height adjustment of the shelf was limited to 50 mm intervals, but the height of the shelf can be finely adjusted at 25 mm intervals in the assembled shelf of the present invention.

In some cases, the height of the shelf is adjusted when the articles to be stored are changed. In such a case, an existing assembly shelf is used to adjust the height of the half of the pitch p of the locking holes provided in the column. p
It can be finely adjusted at the interval of / 2, and the storage efficiency can be increased.

Even when the horizontal rail 6 is turned upside down, since the horizontal rail 6 itself is vertically symmetrical, the vertical rail 8 is formed at the cut 6f formed on the upper horizontal wall 6d and the vertical inner wall 6e. The vertical bar 8 can be similarly installed on the front and rear horizontal bars 6 and 6 by fitting the locking claw portion 8b of the vertical bar 8b.

Usually, the pallet 9 placed on the shelf 7 has a length such that the depth of the pallet 9 is hung between the front and rear horizontal rails 6, but when the pallet 9 is shifted back and forth, there is no vertical rail 8. And the pallet 9 may come off from the horizontal rail 6, and the vertical rail 8 prevents this. In addition, because there is vertical bar 8,
Small pallets can also be placed.

In the above embodiment, a single pallet rack 1 is shown. However, since the outer wall 3a of the column 3 has two rows of locking holes 10 arranged in the right and left directions, the column 3 (column New pallet racks can be sequentially formed on the left and right using the frame 2) in common to form a multiple pallet rack.

FIG. 15 shows a more specific embodiment.
It will be described based on. In this pallet rack 20, the pitch p of the locking holes formed in the column 21 is 90 mm, and
The thickness of 22 is 100mm and the height from floor to ceiling is 4850m
m warehouse. Now load including pallet 100
It is assumed that a load 23 of 0 mm is stored.

A minimum distance between the load 23 accommodated for loading / unloading by a loading / unloading device such as a forklift and the shelf 22 thereon.
100mm upper clearance is required. Therefore, in the case of a conventional shelf adjustment shelf, as shown in FIG.
Since the upper clearance of m is insufficient, the upper clearance is set to 180 mm, which is one pitch larger than the upper clearance. Therefore, the step pitch is 1280 (1000 + 180 + 100) mm, and four shelf steps are formed with the floor as the first step.

Therefore, the height of the fourth shelf is 3840 mm, and the height from the shelf to the ceiling is 1010 mm. Therefore, the fourth shelf has room for accommodating a load 23 having a height of 1000 mm. However, because the upper clearance is only 10 mm, loading and unloading work cannot be performed, and eventually the load 23 cannot be stored in the fourth shelf, lowering the storage efficiency.

On the other hand, in the present invention, by using the horizontal rail upside down, the pitch of the locking hole of the support column 21 is 90 mm.
Since the height of the shelf can be adjusted at a pitch of 45 mm, which is half of the height of the shelf, the carry-in / out operation can be performed with the upper clearance reduced by 45 mm to 135 mm. In this case, as shown in FIG. ) mm.

The height of the shelf at the fourth tier is 3705 mm, the height from the shelf to the ceiling is 1145 mm, and it can accommodate a load 23 with a height of 1000 mm and secure an upper clearance of 145 mm. The load 23 can also be stored in the second shelf. Therefore, the accommodation efficiency can be improved.

Further, since the step pitch can be finely adjusted, the height of the uppermost shelf surface can be set as low as possible, and work with a forklift can be facilitated, and work efficiency can be increased.

Next, different examples of the locking structure of the vertical beam to the horizontal beam will be described with reference to FIGS.

As shown in FIG. 16 to FIG.
The cross-section 31 is substantially the same in shape as the cross bar 6 and has a cross section having a central vertical outer wall 31, upper and lower inclined walls 31b, 31b, a vertical outer wall 31c,
31c and the horizontal walls 31d, 31d form a substantially Σ shape, but the ends of the horizontal walls 31d, 31d are turned inward. Then, a plurality of cuts 31f are formed in the inclined walls 31b, 31b in the left-right direction.
Are formed at the width interval of the vertical rail 35, and the horizontal rail 31 has a vertically symmetric shape including the cut 31f.

The locking fittings 32 welded to both ends of the horizontal rail 31
L-shaped outer wall having the same shape as the lock fitting 15
32a and a side wall 32a.
Holes 32c are formed, and two upper and lower holes 32c, 32c are formed.
Locking pins 33, 33 are fitted to the bosses.

The metal fittings 32 are welded symmetrically to both ends of the horizontal rail 31. At that time, the horizontal rail is
Rather than being fixed at the center in the vertical direction, 31 is fixed at a position shifted by p / 4 above the center point height M of the upper and lower locking pins 33, 33 as shown in FIG. Accordingly, when the horizontal rail 31 is turned upside down, the horizontal walls 31d, 31d of the horizontal rail 31 are shifted up and down by p / 2.

As shown in FIGS. 19 to 21, the vertical rail 35 has a vertical rail main body 36 having a U-shaped cross section, a downward opening, and flanges on the left and right sides. Locking members 37, 37 are fixedly attached to the arm. The locking member 37 has a U-shaped cross section and is open at the top, left and right side walls 37a, 37a extend forward or backward, and locking claw portions 37b, 37b are formed with cutouts at lower end edges. I have.

The locking member 37 is fitted to the end of the vertical rail main body 36 from below so as to be sandwiched between the left and right side walls 37a, 37a,
37b, 37b is projected outward and welded. This vertical bar 35
The front and rear locking claws 37b, 37b are inserted and locked into required cuts 31f, 31f of the front and rear horizontal rails 31, 31, and the vertical rail 35 is erected (see FIG. 22). When the vertical rail 35 is installed, the horizontal rail 31
The upper surface of the vertical bar 35 constitutes the same shelf surface.

In FIG. 22, when the horizontal rail 31 is erected in the posture shown by the solid line, the height of the shelf is adjusted for each pitch p, and further fine adjustment is not possible. However, the horizontal rail 31 is turned upside down. When used in the posture, the locking pin 33 is locked in the same locking hole to support the locking fitting 32, and FIG.
As shown by a two-dot chain line, the height of the shelf 7 is lower by p / 2.

That is, when the assembling shelf is assembled including use of the horizontal rail 31 upside down, the height of the shelf can be finely adjusted at an interval of p / 2, which is half the pitch p of the locking holes. Even when the horizontal rail 31 is turned upside down, since the horizontal rail 31 itself has a vertically symmetric shape, the locking claws 37b of the vertical rail 35 are fitted into the cuts 31f formed in the inclined wall 31b on the upper side. Thus, the vertical bar 31 can be similarly installed on the front and rear horizontal bars 31, 31.

In the present embodiment, as shown in FIG. 22, since the end of the vertical bar 35 enters under the horizontal wall 31d above the horizontal bar 31, an upward force is applied to the vertical bar 35 for some reason. Even if it is applied, the horizontal wall 31d functions as a stopper to prevent the locking claw 37b from being unlocked.

In the above-described embodiment, a horizontal rail having a substantially Σ-shaped cross section is used, but a simple C-channel or pipe-shaped horizontal rail may be used.

[Brief description of the drawings]

FIG. 1 is a perspective view of a pallet rack according to an embodiment of the present invention.

FIG. 2 is a top view of a column.

FIG. 3 is a partial front view of a column.

FIG. 4 is a front view of a horizontal rail.

FIG. 5 is a top view of the same.

FIG. 6 is a side view of the same.

FIG. 7 is a partially enlarged front view of the same.

FIG. 8 is a partially enlarged top view of the same.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a side view of a vertical rail.

FIG. 11 is a front view of the same.

FIG. 12 is a partial plan view of the assembled pallet rack.

FIG. 13 is a front view of the same.

FIG. 14 is a side view of the same partially sectioned view.

FIG. 15 is an explanatory view of a pallet rack according to a specific embodiment.

FIG. 16 is a partial front view of a crosspiece according to another embodiment.

FIG. 17 is a top view of the same.

FIG. 18 is a sectional view taken along the line XVIII-XVIII in FIG.

FIG. 19 is a side view of a vertical rail.

FIG. 20 is a top view of the same.

FIG. 21 is a front view of the same.

FIG. 22 is a partially sectional side view of the assembled pallet rack.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pallet rack, 2 ... Column frame, 3 ... Prop, 4 ... Brace, 5 ... Horizontal material, 6 ... Horizontal beam, 7 ... Shelf, 8 ... Vertical beam, 9 ...
Pallet, 10 ... locking hole, 12 ... bracket, 13 ... bolt
Nut, 15 ... locking bracket, 16 ... locking pin, 17 ... pin. 20…
Pallet rack, 21 ... pillar, 22 ... shelf, 23 ... load, 31 ... horizontal rail, 32 ... locking bracket, 33 ... locking pin, 35 ... vertical rail, 36 ... vertical rail main body, 37 ... locking member.

Claims (3)

[Claims] 1. A shelf height in which a plurality of connecting bars are erected in the height direction between adjacent columns, and each shelf is constituted by the plurality of connecting bars erected at the same height. In the adjustment shelf, the pillar has a plurality of locking holes formed at a predetermined pitch p in a height direction, the connecting bar has a vertically symmetric shape, and locking fittings along the pillar are symmetrically fixed to both ends, A pair of upper and lower pins spaced apart by an integral multiple of the pitch p are provided on the latch so as to be latchable in the latch holes of the column, and the center of the upper and lower pins with respect to the left and right latches. The height of the shelf is adjusted by p / 4 from the point, and the height of the shelf can be adjusted at p / 2 intervals by using the connection bar upside down. shelf. 2. A column frame in which a pair of front and rear columns are connected by a connecting member is arranged in the left-right direction so as to face each other, and the height of a plurality of horizontal bars is adjusted in the height direction between the columns adjacent in the left-right direction. In a shelf-height-adjustment shelf, which is an assembled shelf in which each shelf is constructed by a pair of horizontal rails erected at the same height in the front-rear direction, the support posts have locking holes at a predetermined pitch p in the height direction. A plurality of the horizontal rails are vertically symmetrical, and locking members along the right and left columns are fixed symmetrically at both ends, and the locking members are vertically separated by an integral multiple of the pitch p. A pair of pins are projected from the locking holes of the column so as to be lockable, and the horizontal rail is fixed to the left and right locking fittings by being displaced vertically by p / 4 from a center point of the upper and lower pins. The height of the shelf can be adjusted at p / 2 intervals by using the horizontal rail upside down. Trays height adjustment rack, characterized. 3. The shelf height-adjustable shelf according to claim 2, wherein a plurality of vertical rails are detachably mounted in a left-right direction between a pair of front and rear horizontal rails constituting said shelf.