JP7197093B2 - cabinet - Google Patents

Description

The present invention relates to a cabinet that stores articles by opening and closing a door attached at an offset position.

Conventionally, food stores such as supermarkets and convenience stores have cabinets (also known as food display fixtures, showcases, etc.) with slanted openings for taking out products and a wide shelf area on the lower shelf for displaying products. ) are used. Such food display fixtures are convenient in that users can easily see the products placed on the shelves and easily take out the products.

In such food display fixtures, a transparent inclined door (opening/closing door) is sometimes provided so as to cover the obliquely formed opening in order to keep the food sanitary. The opening/closing door is formed in a flat plate shape, an L shape, or a curved shape so as to extend obliquely downward in the front direction from the upper guide rail while being attached to the main body. That is, the opening/closing door is arranged at a position where the center of gravity of the opening/closing door is offset (shifted) to the front side with respect to the upper guide rail. The opening/closing door can be moved in the opening/closing direction (horizontal direction when the opening is viewed from the front) while being inclined along the upper guide rail (see Patent Documents 1 to 3, for example).

On the other hand, as shown in Patent Document 3 (especially see FIGS. 2 and 4(b)), below the opening/closing door,
Rollers are provided. Generally, the roller is placed on the lower shelf of the food display fixture and rolls in the opening/closing direction. With this structure, it is possible to provide an inexpensive product with a small number of parts.

Japanese Patent Application Laid-Open No. 2008-206640 JP 2009-131435 A JP 2012-196313 A

In the food display fixtures described above, it is preferable that the opening/closing door can be detached during cleaning or during busy times such as time sales. Therefore, the opening/closing door can be removed by lifting the opening/closing door upward to release the engagement with the upper guide rail portion.
On the other hand, when a user tries to open and close the door to take out a product from the shelf, he or she does not know how much force should be applied to open and close the door, and sometimes tries to move the door with a strong force. Then, the moving speed of the upper portion of the opening and closing door deviates from the moving speed of the lower portion of the opening and closing door (there is a difference in speed), so that the opening and closing door is tilted and the lower roller is lifted. In particular, in the case of an opening/closing door whose center of gravity is not directly above the lower guide rail, there is a risk that the opening/closing door may shift forward and backward and derail when it floats. On the other hand, a structure for preventing the roller from floating up is also conceivable, but the lower structure is complicated and expensive. Moreover, there is a demerit that the opening/closing door cannot be easily attached/detached.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and its object is to provide a cabinet in which the opening and closing door can be easily attached and detached, and the lower side of the opening and closing door is difficult to come off even if the user opens and closes it with a strong force. It is intended to provide

In order to solve the above-mentioned problems, the present invention provides a cabinet having an upper guide rail for supporting an upper part of an opening/closing door, and in which the opening/closing door is mounted at a position offset to the front side of the upper guide rail, the cabinet comprising: The main body is provided with a lower guide rail that receives the lower side of the opening/closing door, and the lower side of the opening/closing door extends in the vertical direction to prevent derailment that maintains engagement with the lower guide rail. A block is attached , and the derailment prevention block has a fixed portion attached to the lower side of the opening and closing door, and a sliding portion that moves downward with respect to the fixed portion. A protrusion extending continuously in the opening/closing direction is provided, and an engagement groove that engages with the protrusion is formed on the lower surface of the slide portion, and the protrusion has a circular cross section. It is characterized in that the engaging groove is arcuately formed so that the opening/closing door slides in the opening/closing direction while being in contact with the projecting portion on a curved surface .

Further, a closer may be provided for pulling the opening/closing door in the opening/closing direction.

In the cabinet according to the present invention, the cabinet body is provided with a lower guide rail for receiving the lower side of the opening/closing door, and the lower side of the opening/closing door extends in the vertical direction so as to connect with the lower guide rail. Since the derailment prevention block is attached to maintain engagement, even if an unnecessary upward force is applied when opening and closing the door, the derailment prevention block maintains engagement with the lower guide rail. , the opening and closing door can be structured so that it does not come off easily. On the other hand, during cleaning, the door can be easily removed by lifting the door above a predetermined height to disengage the derailment prevention block and the lower guide rail.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an entire food display fixture having an inclined door, which is a food display fixture according to an embodiment of the present invention; It is a perspective view which shows the state which removed the inclination door of the right side from the state of FIG. FIG. 3 is a perspective view showing only the main body, with the left tilted door removed from the state of FIG. 2 ; FIG. 4 is an exploded perspective view of the main body shown in FIG. 3; It is a side view which shows the state by which the inclination door was attached to the lower guide rail. It is a perspective view which shows a lower guide rail alone. (A) is a plan view of a lower guide rail, and (B) is a bottom view of (A) viewed from below. Fig. 10 is an enlarged perspective view of the lower portion of the tilted door; FIG. 4 is a perspective view of a moving roller; It is a perspective view of a derailing prevention block, (A) is a normal state, (B) is an extension state. It is an exploded perspective view of a derailment prevention block. It is a side view which shows the engagement state of a derailing prevention block and a ridge part, (A) shows a normal state, (B) shows the state in which force acted on the upper side. It is a side view showing the engagement state of the derailment prevention block and the ridge portion, (A) shows the state in which the force acts on the rear side, and (B) shows the state in which the force acts on the front side.

A food display fixture 1 (cabinet) according to an embodiment of the present invention will be described in detail below with reference to the drawings. In the present embodiment, as an example in which the opening/closing door 3 is offset to the front side of the upper guide rail 10, a cabinet having the inclined door 3 attached so as to cover the inclined opening will be described. .

Here, the term "cabinet in which the opening/closing door is attached at an offset position" as used in this specification is different from a general sliding door in which the opening/closing door is suspended directly below the upper guide rail. It refers to a type of cabinet in which the opening and closing door is suspended on the near side. More specifically, the cabinet is of a type in which the center of gravity of the opening/closing door is located on the front side of the upper guide rail, and a diagonal load acts on the upper guide rail in a suspended state.
In addition, "tilting of the opening/closing door" refers to the upper part of the opening/closing door that moves in the opening/closing direction along the upper guide rail when the opening/closing door is moved with a strong force, and the part that moves in the opening/closing direction along the lower guide rail. It means that the opening/closing door tilts with respect to the opening/closing direction due to the deviation of the moving speed from the lower part of the opening/closing door (there is a speed difference).

FIG. 1 is a perspective view showing an entire food display fixture 1 having an inclined door 3. FIG. 2 shows a state in which the right inclined door 3a is removed from the state shown in FIG. 1, and FIG. 3 is a perspective view showing only the cabinet body 2 in a state in which the left inclined door 3b is further removed. is. Furthermore, FIG. 4 is an exploded perspective view of the cabinet body 2 of FIG.

Note that the front-back, left-right, and up-down directions used in this embodiment refer to the directions shown in FIG. Further, the opening/closing direction of the opening/closing door refers to the horizontal direction.

As shown in FIGS. 1 to 4, the food display fixture 1 has an opening with an inclined structure on the front side of the food display fixture main body 2 (hereinafter referred to as the main body 2). Two inclined doors 3 (a front door 3a positioned on the right side in FIG. 1 and a rear door 3b positioned on the left side) are attached so as to cover it. More specifically, the front portion of the main body 2 is formed so as to be inclined rearward from the lower side to the upper side, and this inclined surface is open. Similarly, when the tilted door 3 is attached to the main body 2, the tilted door 3 is tilted so that the upper side of the tilted door 3 is located on the rear side of the lower side.

The front side door 3a and the rear side door 3b are so-called sliding door type doors, and can be opened and closed by moving them in the left-right direction. The inclined door 3 is made of a transparent material such as acrylic or glass so that the inside of the main body 2 can be seen in the closed state.

An upper guide rail 10 is attached to the upper side of the body portion 2 . The upper guide rail 10 is provided over the entire left and right length in the opening/closing direction. Further, inside the upper guide rail 10, as shown in FIGS. 2 to 4, mounting metal fittings 11a and 11b are provided which are movable in the opening/closing direction along the upper guide rail 10. As shown in FIGS. The mounting brackets 11a and 11b have moving rollers (not shown) so that they can move smoothly within the upper guide rail 10. As shown in FIG. A decorative plate 12 is attached to the upper side of the upper guide rail 10 to hide the gap between the upper guide rail 10 and the inclined door 3, as shown in FIG.

Further, the main body part 2 is provided with a shelf part 4 for displaying products on its lower side. The shelf portion 4 extends to the front side of the upper guide rail 10 to secure a large shelf area of the shelf portion 4. - 特許庁This makes it easy to see the products displayed on the shelf 4 and to put them in and take them out.

Further, a lower guide rail 20 is attached to the front side of the shelf 4 as shown in FIGS. Similar to the upper guide rail 10, the lower guide rail 20 is also provided over the entire left and right length in the opening/closing direction. The details of the structure of the lower guide rail 20 will be described later.

As shown in FIG. 2, the front door 3a can be removed from the main body 2 by lifting it upward. More specifically, the upper portion of the front door 3a is placed on the mounting brackets 11a, 11a described above and fixed by fasteners (not shown). Since the front door 3a cannot be easily attached and detached if it is firmly attached by screwing or the like, the attachment and detachment is made possible by a simple structure such as a horizontal slide.

The lower portion of the front door 3a is placed on the lower guide rail 20 via rollers. As a result, the mounting brackets 11a, 11a move along the upper guide rail 10 in the opening/closing direction, so that the attached front door 3a can also freely move in the opening/closing direction.

The upper and lower portions of the rear door 3b also have the same structure as the front door 3a, and can be removed from the main body 2 by lifting them upward and can be freely moved in the opening/closing direction.

FIG. 5 is a side view showing the inclined door 3 attached to the lower guide rail 20. As shown in FIG. 6 is a perspective view showing the lower guide rail 20 alone. 7(A) is a plan view of the lower guide rail 20, and FIG. 7(B) is a right side view of FIG. 7(A) viewed from the right side.

As shown in FIGS. 5 to 7, the lower guide rail 20 has a substantially U-shaped cross-section taken along a plane perpendicular to the longitudinal direction and is open on the upper side. More specifically, an attachment surface portion 21 attached to the front upper surface of the shelf portion 4 , a rear wall portion 22 extending downward from the front side of the attachment surface portion 21 , and a bottom surface portion 23 extending forward from the lower end of the rear wall portion 22 . , and a front wall portion 24 extending upward from the front side of the bottom portion 23 . As shown in FIGS. 6 and 7A, the bottom surface portion 23 is formed with notch portions 25 at both ends thereof in the left-right direction.

As shown in FIG. 5, the mounting surface portion 21 is mounted so as to be substantially flush with the upper surface of the shelf portion 4, and has a stepless structure. Further, the rear wall portion 22 is in surface contact with the front end surface of the shelf portion 4 so that the shelf portion 4 can also receive the force acting downward.

As shown in FIGS. 5 to 7, two protrusions 26 are formed on the bottom surface portion 23 . The two ridges 26 are continuous in the left-right direction of the lower guide rail 20 and are arranged with a predetermined interval in the front-rear direction. Further, the ridge portion 26 is formed to have an arcuate cross-sectional shape (see FIGS. 5, 12, and 13).

As shown in FIG. 5, receiving rollers 30 (see FIG. 9) provided at the lower portions of the front door 3a and the rear door 3b are placed on the ridge 26 from above. It is designed to move in the opening and closing direction along the edge. Specifically, the receiving roller 30 of the front door 3a moves on the front protrusion 26, and the receiving roller 30 of the rear door 3b moves on the rear protrusion 26. As shown in FIG.

FIG. 8 is an enlarged perspective view of the lower portion of the inclined door 3. FIG. 9 is a perspective view of the receiving roller 30 alone, and FIG. 10 is a perspective view of the derailment prevention block 40, in which (A) shows a normal state and (B) shows a stretched state. Furthermore, FIG. 11 is an exploded perspective view of the derailment prevention block 40. As shown in FIG.

Below the tilted door 3, as shown in FIG. 8, a lower crosspiece 5 is provided continuously in the left-right direction. As shown in FIG. 5, the cross section of the lower rail 5 is formed in an inverted U-shape with an open bottom. As shown in FIG. 8, receiving rollers 30 are attached to the left and right ends of the U-shaped interior, and a derailment prevention block 40 is attached to the central portion. The mounting position and number of the derailing prevention blocks 40 can be appropriately changed in consideration of the shape and size of the inclined door 3, for example, by providing them on the side of the receiving roller 30, respectively.

The receiving roller 30 is composed of a mounting plate 31 and a roller portion 32 fixed to the mounting plate 31, as shown in FIG. Two mounting holes 31a are provided at both ends of the mounting plate 31, and the mounting plate 31 is mounted to the inverted U-shaped ceiling portion of the lower rail 5 with screws. A roller 34 that freely rotates around a rotating shaft 33 that extends in the front-rear direction is attached to the roller portion 32 .

As shown in FIGS. 10A, 10B, and 11, the derailing prevention block 40 is composed of a fixed portion 41 located on the upper side and a sliding portion 42 located on the lower side. The fixing portion 41 has a hollow inside, and the sliding portion 42 is inserted through the lower opening, and the sliding portion 42 moves up and down with respect to the fixing portion 41 .

The fixed portion 41 is formed in a substantially T shape, and two mounting holes 41a are provided on the upper side thereof. Like the receiving roller 30, it is attached to the inverted U-shaped ceiling portion of the lower rail 5 with a screw to the attachment hole 41a. The fixed portion 41 is formed with two elongated holes 43 extending vertically when viewed from the front. The elongated holes 43 are arranged at intervals in the left-right direction, and are provided in such a manner as to pass through in the front-rear direction with an internal hollow portion interposed therebetween.

As shown in FIG. 11, the slide portion 42 is formed in a substantially rectangular parallelepiped shape. Guiding protrusions 49 extending in the vertical direction and protruding outward are provided at four locations on the front, rear, left and right sides of the slide portion 42 . The four guide protrusions 49 are inserted into four guide grooves (not shown) formed in the hollow interior of the fixed portion 41 so that the slide portion 42 can move up and down smoothly with respect to the fixed portion 41. .

Two insertion holes 44 are formed on the left and right sides of the slide portion 42 . The insertion hole 44 is positioned corresponding to the elongated hole 43 of the fixing portion 41 , and the pin 45 is inserted into the elongated hole 43 and the insertion hole 44 while the slide portion 42 is inserted into the fixing portion 41 . As a result, the slide portion 42 can move (extend) vertically from the L1 dimension to the L2 dimension shown in FIG. 10 within the length of the long hole 43 .

In addition, three spring retainers 47 are provided on the upper surface of the slide portion 42 so as to protrude upward in a columnar shape. Three coil springs 46 that extend and contract in the vertical direction are attached to the spring receivers 47, respectively. Due to this coil spring 46, the slide portion 42 is always urged downward with respect to the fixed portion 41 (see FIG. 10B).

Further, an engagement groove 48 is formed on the lower surface of the slide portion 42 so as to extend continuously to both ends in the left-right direction. As shown in FIG. 5, the engaging groove 48 is recessed from bottom to top, and the upper portion of the groove in cross section is arcuate. The diameter of this circular arc shape is formed substantially equal to the diameter of the circular arc shape of the ridge portion 26 of the lower guide rail 20 described above. It slides in the opening and closing direction while contacting with the curved surface.

In addition, as shown in FIG. 5, the roller 34 of the receiving roller 30 is also provided with grooves of the same shape along the circumferential direction on the outer peripheral surface thereof. Thereby, the roller 34 rotates while being in contact with the ridge portion 26 on the curved surface.

Next, the operation and action of the food display fixture 1 according to the embodiment of the present invention will be described in detail.
12 and 13 show various states in which the derailing prevention block 40 is engaged with the protrusion 26 of the lower guide rail 20. FIG. 12 and 13, only the derailment prevention block 40 attached to the lower guide rail 20 and the front door 3a is shown, and the derailment prevention block 40 that moves on the rear protrusion 26 is shown in FIGS. The ring prevention block 40 is omitted from the description. Further, since the derailing prevention block 40 attached to the rear door 3b also has the same operation and action as the front door 3, detailed description thereof will be omitted.

As shown in FIG. 12A, the derailment prevention block 40 is attached by engaging the engagement groove 48 with the protrusion 26 of the lower guide rail 20 . At this time, the derailment prevention block 40 is in a state in which the coil spring 46 is pushed in by the weight of the tilted door 3, and the slide portion 42 enters the fixing portion 41 (state shown in FIG. 10(A)). When the user of the food display fixture 1 opens and closes the inclined door 3, it moves in the opening and closing direction in this state in a normal operation.

On the other hand, since the center of gravity of the tilted door 3 is located forward of the upper guide rail 10, when the user opens and closes the tilted door 3, unlike a general sliding door, the tilted door 3 can move upward or forward or backward. Unnecessary force may be applied. Such a case will be described below.

When a force to tilt the tilted door 3 acts, the receiving roller 30 is lifted upward together with the tilted door 3 and disengages from the protrusion 26 . On the other hand, the slide portion 42 of the derailment prevention block 40 is pushed down by the biasing force of the coil spring 46, and as shown in FIG. become. Therefore, when the force acting upward disappears and the inclined door 3 returns downward, the derailment prevention block 40 contracts to the normal state (L1 dimension), and the receiving roller 30 does not shift back and forth and hits again. It will return to the original state of engagement with the ridge 26 (the state where the wheel does not come off). That is, the tilted door 3 is prevented from coming off the guide of the ridge portion 26 carelessly.

In addition, when the clerk tries to remove the tilted door 3, the tilted door 3 can be removed as easily as conventional by lifting the tilted door 3 above the dimension L2 at which the derailing prevention block 40 slides up and down. .

Also, when the tilted door 3 tilts and a pushing force acts on the rear side, as shown in FIG. By leaning backward along the arc shape of the ridge 26, the force is released. Therefore, the derailing prevention block 40 does not come off from the guide of the protrusion 26 against the pushing force. In addition, before and after the engagement groove 48 of the slide portion 42, the corners are chamfered to prevent interference with the lower guide rail 10 when the derailment prevention block 40 is tilted forward and backward. .

In addition, as shown in FIG. 13(B), when a force pulling the inclined door 3 forward is applied, the derailment prevention block 40 is inclined forward along the arc shape of the protrusion 26. , the derailment prevention block 40 does not come off from the guide of the ridge part 26 against the pulling force. In addition, the receiving roller 30 also tilts along the arc shape with respect to the force in the front-rear direction, and does not come off the guide of the ridge portion 26 .

Next, operation of the lower guide rail 20 will be described.
As shown in FIGS. 5, 12 and 13, the lower guide rail 20 has a so-called gutter-like structure covering the lower side of the inclined door 3 from below at a position one step lower than the upper surface of the shelf 4. ing. With this structure, the lower side of the slanted door 3 does not go beyond the lower guide rail 20 and is prevented from coming off in the front-rear direction, so that the safety is further enhanced.

Further, the lower rail 5 of the inclined door 3 is accommodated within the lower guide rail 20 by receiving it at a position one step lower. That is, since the lower rail 5 is opaque, if it is received at the same height as the shelf 4 , the lower rail 5 creates a blind spot in front of the shelf 4 . Therefore, it is not possible to place a plate or the like with the product name on the front side. On the other hand, in the structure of this embodiment, since the dead angle due to the lower rail 5 is minimized, no dead angle is formed on the near side of the shelf 4, and the shelf 4 can be used over a wider area. .

Furthermore, since there is no step between the upper surface of the shelf 4 and the lower guide rail, the debris (for example, food scraps, garbage, etc.) that has fallen on the upper surface of the shelf 4 is removed by the lower guide rail. The bottom portion 23 of 20 can be swept down. As a result, cleaning is easy, and the upper surface of the shelf part 4 can always be kept clean. It should be noted that debris swept onto the bottom surface portion 23 can be discharged from a notch portion 25 (see FIG. 7A) formed on the bottom surface portion 23. As shown in FIG.

According to the food display fixture 1 according to the embodiment of the present invention, it has the upper guide rail 10 that supports the upper part of the inclined door 3, and the inclined door 3 is attached at a position offset to the front side from the upper guide rail 10. The cabinet main body 2 is provided with a lower guide rail 20 for receiving the lower side of the inclined door 3, and the lower side of the inclined door 3 extends vertically when the inclined door 3 is inclined. Since the derailment prevention block 40 that maintains the engagement with the lower guide rail 20 is attached, even if an unnecessary tilting force acts when opening and closing the inclined door 3, the derailment prevention block 40 is attached to the lower guide rail 20. Since the engagement with is maintained, the inclined door 3 can be structured so as not to come off easily. On the other hand, during cleaning, the tilted door 3 can be easily removed by lifting the tilted door 3 to a predetermined height or more to disengage from the derailment prevention block 40 .

In addition, since the derailment prevention block 40 has a fixed portion 41 attached to the lower side of the inclined door 3 and a slide portion 42 that moves downward with respect to the fixed portion 41, the slide portion 42 can be moved up and down. The derailment prevention block 40 can be extended and contracted in the vertical direction with a simple structure that guides it to.

Furthermore, the lower guide rail 20 is provided with a ridge portion 26 extending continuously in the opening and closing direction, and an engagement groove 48 that engages with the ridge portion 26 is formed on the lower surface of the slide portion 42. Since the cross-sectional shape of the protrusion 26 is arc-shaped, even if an unnecessary force acts in the front-rear direction when opening and closing the inclined door 3, the arc-shaped protrusion 26 serves as a fulcrum. The derailing prevention block 40 can be tilted in the front-rear direction to receive the force. This makes it difficult for the derailment prevention block 40 to come off from the protrusion 26 .

Although the cabinet having the inclined door according to the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention. It is possible.

For example, in the present embodiment, as an example of a cabinet in which an opening/closing door is attached at a position offset to the front side of the upper guide rail 10, a food display having an inclined door 3 attached so as to cover an inclined opening is provided. Although the fixture 1 was explained, it is not limited to this. For example, even in a cabinet having an opening/closing door formed in a substantially L-shaped curved surface shape as disclosed in Patent Documents 2 and 3, if the opening/closing door is installed at an offset position, the same can be applied. Since the problem occurs, the effect of the present invention comes to be exhibited.

In addition, in the present embodiment, the food display fixture 1 is described as an example of a cabinet. can be used for

Furthermore, in the present embodiment, in the derailment prevention block 40, the slide portion 42 is biased downward by the coil spring 46 to move, but the present invention is not limited to this. For example, the weight of the slide portion 42 may be increased or a weight may be added so that the slide portion 42 moves downward under its own weight. That is, as long as the structure is such that the sliding portion 42 moves downward when the tilted door 3 is lifted upward, this can be achieved by applying a conventional general technique.

In addition, in the present embodiment, the protrusion 26 projecting toward the lower guide rail 20 side is provided, and the engagement groove 48 that engages with the protrusion 26 is provided on the derailment prevention block 40 side. The unevenness of the protrusion 26 and the engagement groove 48 may be reversed. Even in this case, when the inclined door 3 is inclined, it can be dealt with appropriately.

On the other hand, the food display fixture 1 of this embodiment may be provided with a closer for moving the inclined door 3 in the opening/closing direction. The closer is for forcibly moving the inclined door 3 to a closed state when the inclined door 3 is half-opened, or for buffering the force when trying to close it with a strong force. In food display fixtures, it is useful to keep the tilted door 3 closed in order to keep the interior sanitary, and the demand for this is increasing in recent years.

If this closer is attached to a food display fixture 1 having an offset door, a speed difference is likely to occur between the upper and lower rollers, which may cause the inclined door 3 to tilt. Since the center of gravity of the tilted door 3 is not on the lower guide rail 20, the inclined door 3 easily derails. Therefore, if the structure of the derailing prevention block 40 is applied to the food display fixture 1 to which the closer is attached, the reliability of the operation of the closer will be further enhanced.

1 Food display fixtures (cabinet)
2 Food display fixture body (main body)
3 Tilted door (opening/closing door)
3a Front door 3b Rear door 4 Shelf 5 Lower rail 10 Upper guide rail 11a, 11b Mounting bracket 12 Decorative plate 20 Lower guide rail 21 Mounting surface 22 Rear wall 23 Bottom surface 24 Front wall 25 Notch 26 Projection Part 30 Receiving roller 31 Mounting plate 31a Mounting hole 32 Roller part 33 Rotating shaft 34 Roller 40 Derailment prevention block 41 Fixing part 42 Slide part 43 Long hole 44 Insertion hole 45 Pin 46 Coil spring 47 Spring receiver 48 Engagement groove 49 Guide protrusion Department

Claims (2)

A cabinet having an upper guide rail that supports an upper part of an opening/closing door, and in which the opening/closing door is mounted at a position offset to the front side of the upper guide rail,
The cabinet main body is provided with a lower guide rail that receives the lower side of the opening/closing door, and the lower side of the opening/closing door extends vertically to maintain engagement with the lower guide rail. A prevention block is installed ,
The derailment prevention block has a fixed part attached to the lower side of the opening and closing door, and a sliding part that moves downward with respect to the fixed part ,
The lower guide rail is provided with a ridge extending continuously in the opening and closing direction, and an engaging groove that engages with the ridge is formed on the lower surface of the slide portion,
The protrusion has an arcuate cross-sectional shape , and the engaging groove has an arcuate shape so that the opening/closing door slides in the opening/closing direction while being in contact with the protrusion on a curved surface. A cabinet characterized by: 2. The cabinet according to claim 1 , further comprising a closer for pulling the opening/closing door in one of the opening/closing directions.

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