Cabinet

Abstract

To provide a cabinet capable of further reliably functioning a closer by minimizing displacement of an opening / closing door at an offset position.SOLUTION: A cabinet comprises an upper guide rail 10 for supporting an upper side of an opening / closing door 3, the opening / closing door 3 attached at a position offset to a front side with respect to the upper guide rail 10, the opening / closing door 3 being a sliding door, and a closer 60 for forcibly moving the opening / closing door 3 to a closed position when the opening / closing door 3 is closed. The upper guide rail 10 includes a lower rail 12 and an upper rail 13 that extend along an opening / closing direction of the opening / closing door 3 and are provided at an interval apart from each other in the vertical direction. The opening / closing door 3 includes traveling rollers 34 coming into contact with the lower rail 12 and rolling with a gap formed from the upper rail 13, and a center roller 35 energized upward to come into contact with the upper rail 13 and rolling with a gap formed from the lower rail 12.SELECTED DRAWING: Figure 15

Description

Technical Field

[0001] The present invention relates to a cabinet that opens and closes an opening / closing door attached at an offset position to store articles.

Background Art

[0002] Conventionally, in food stores such as supermarkets and convenience stores, a food display shelf (showcase) is used in which an opening for taking out products is formed obliquely, the shelf area of the shelf portion located on the lower side is secured widely, and the area of the shelf portion located on the upper side is made narrower than that of the lower shelf portion. In such a food display shelf, the user can visually check the products placed on the lower shelf portion without being obstructed by the upper shelf portion, and the user can easily take out the products on the lower side by bending down a little, which is convenient.

[0003] In such a food display shelf, in order to maintain the sanitary state, a sliding door type opening / closing door may be provided so as to cover the obliquely formed opening portion. An upper guide rail is provided at the upper part of this opening portion, and the opening / closing door moves in the opening / closing direction while being supported by this upper guide rail. Further, the opening / closing door extends obliquely downward in the front direction from the upper guide rail in a state of being attached to the main body portion, and is installed at a position offset (shifted) to the front side with respect to the upper guide rail (see, for example, Patent Document 1).

[0004] In addition, some food display shelves having such an inclined door are provided with a closer for forcibly moving (pulling in) the opening / closing door to the closed position when the opening / closing door is closed. By providing this closer, it is possible to prevent the opening / closing door from being left in a half-open state, and the sanitary state can be maintained even better when displaying foods (see, for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] In the above-described food display shelf, since the position of the upper guide rail that supports the upper part of the opening / closing door and the center-of-gravity position of the offset opening / closing door are displaced in the front-rear direction, a rotational moment is generated by the load (self-weight) acting on the center of gravity of the opening / closing door, and the upper part of the opening / closing door is likely to tilt. Further, in the case of a tilted opening / closing door, since the weight of the user is likely to be applied to the opening / closing door when opening and closing, a load that presses the upper part of the opening / closing door may occur.

[0007] These loads cause the upper part of the opening / closing door to be displaced in the vertical direction or the front-rear direction with respect to the closer body attached to the upper guide rail. More specifically, the positions of the catching protrusions provided on the opening / closing door side are likely to be displaced with respect to the closer body in the front-rear and vertical directions. Therefore, there is a risk that the catching protrusions are not caught by the closer and the closer does not function.

[0008] The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a cabinet that can more reliably cause a closer to function by minimizing the displacement of an opening / closing door at an offset position. [Means for Solving the Problems]

[0009] In order to solve the above problems, the present invention has an upper guide rail for supporting the upper part of an opening and closing door, the opening and closing door is attached at a position offset to the front side of the upper guide rail, the opening and closing door is a sliding door, and when the opening and closing door is closed, it is a cabinet provided with a closer for forcibly moving the opening and closing door to a closed position. The upper guide rail is provided with a lower rail and an upper rail extending along the opening and closing direction of the opening and closing door and spaced apart in the vertical direction. The opening and closing door is provided with a running roller that contacts the lower rail and rolls with a gap from the upper rail, and a center roller that contacts the upper rail by being biased upward and rolls with a gap from the lower rail.

[0010] Further, on the side of the opening and closing door, a running member is provided that is suspended in a state where the opening and closing door is offset. The running member includes the running roller and a center roller unit in which the center roller is attached to an elastic unit body, and the center roller is biased upward by the elasticity of the unit body.

[0011] Furthermore, the unit body may be provided with a notch and an elastic holder portion protruding from an end surface of the notch toward the inside of the notch, and the center roller may be attached to the elastic holder portion.

[0012] Also, the unit body may be provided with a protrusion that faces the lower rail or the upper rail with a gap in a state where the running member is assembled to the upper guide rail.

[0013] Furthermore, the notch may be provided with an inner protrusion protruding toward the inside of the notch, and a regulating member that abuts against the inner protrusion and regulates the inclination of the center roller may be provided on the rotation shaft of the center roller.

Advantages of the Invention

[0014] In the cabinet according to the present invention, on the upper guide rail, a lower rail and an upper rail are provided so as to extend along the opening and closing direction of the opening and closing door and be spaced apart in the vertical direction. On the opening and closing door, a traveling roller that contacts the lower rail and rolls with a gap from the upper rail, and a center roller that contacts the upper rail by being biased upward and rolls with a gap from the lower rail are provided. Therefore, even if there are manufacturing errors or mounting errors, gaps or rattles that cause the traveling member to tilt are not generated.

[0015] Further, even if a clockwise rotational moment acts on the traveling member in a direction to fall backward, the rotational moment can be reduced by the upward biasing force of the center roller. Therefore, it is difficult for the traveling member to tilt.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

[0017] Hereinafter, the food display shelf 1 (cabinet) according to the embodiment of the present invention will be described in detail with reference to the drawings. In this embodiment, as an example where the opening and closing door is offset to the front side of the upper guide rail 10, a cabinet having an inclined door 3 attached so as to cover the inclined opening will be described.

[0018] Here, the "cabinet in which the opening and closing door is attached at an offset position" as used in this specification is different from a general sliding door in which the opening and closing door is suspended (supported) directly below the upper guide rail. It refers to a type of cabinet in which the opening and closing door is suspended on the front side of the upper guide rail. More specifically, it is a type of cabinet in which the center of gravity of the opening and closing door is located on the front side of the support point of the upper guide rail, and an oblique force acts on the support point of the upper guide rail in the suspended state.

[0019] FIG. 1 is a perspective view showing the whole food display shelf 1 having the inclined doors 3 (3a, 3b). FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1, and FIG. 3 is a cross-sectional view showing the state where the front inclined door 3a is removed from the state of FIG. 2. Further, FIG. 4 is an enlarged view of the Z portion of FIG. 1, FIG. 5 is a cross-sectional view showing an enlarged portion of the upper guide rail 10, and FIG. 6 is a perspective view of the closer 60 alone seen from the lower front obliquely. Also, FIG. 7 is an enlarged view of the X portion of FIG. 2.

[0020] Note that the front-back, left-right, and up-down directions used in this embodiment refer to the directions shown in FIG. 1. Also, the opening / closing direction of the opening / closing door refers to the left-right direction.

[0021] As shown in FIGS. 1 to 3, the food display shelf 1 is provided with an inclined opening at the front side of the food display shelf main body 2, and two inclined doors 3 (the front door 3a located on the right side in FIG. 1 and the rear door 3b located on the left side) are attached so as to cover this opening. More specifically, the front side portion of the food display shelf main body 2 is formed to be inclined obliquely backward from the lower side to the upper side, and this inclined surface is open. Also, the inclined door 3 is similarly attached in a state of being inclined such that the upper side of the inclined door 3 is located more rearward than the lower side in a state of being attached to the food display shelf main body 2.

[0022] These front door 3a and rear door 3b are so-called sliding door types of doors and can be opened and closed by moving them in the left-right direction. Also, this inclined door 3 is formed in a flat plate shape from a transparent material such as glass, and the inside of the food display shelf main body 2 can be seen even in the closed state.

[0023] Inside the food display shelf main body 2, shelf portions 4a and 4b for displaying goods are provided. The lower shelf portion 4a extends forward to the front side of the upper shelf portion 4b, securing a wider shelf area for the lower shelf portion 4a. This makes it easier to take in and out the goods displayed on the lower shelf portion 4a without being obstructed by the upper shelf portion 4b.

[0024] Also, as shown in FIGS. 1 and 4, an upper guide rail 10 for supporting the upper portion of the inclined door 3 is attached to the ceiling portion 5 of the food display shelf main body 2 at the front side of the ceiling portion 5. This upper guide rail 10 is provided over the entire length of the food display shelf 1 in the left-right direction, and the inclined door 3 moves in the left-right direction along this upper guide rail 10.

[0025] As shown in Fig. 5, the upper guide rail 10 is composed of a guide rail body 11 with a substantially U-shaped cross-section that is open at the bottom, a mounting protrusion 11a extending rearward from the guide rail body 11, and a decorative cover fixing protrusion 11b extending forward from the guide rail body 11.

[0026] The guide rail body 11 is provided with a lower rail 12 and an upper rail 13 that extend substantially horizontally toward the inside of the substantially U-shaped cross-section. The lower rail 12 extends in the front-rear direction from the lower ends of the rear side surface 11c and the front side surface 11d of the guide rail body 11 toward the inside of the guide rail body 11, and a gap is provided so that the tip ends thereof are separated from each other.

[0027] The upper rail 13 extends in the front-rear direction from substantially the central positions in the vertical direction of the rear side surface 11c and the front side surface 11d of the guide rail body 11 toward the inside so as to cover the upper side of the lower rail 12. Similar to the lower rail 12, a gap is provided so that the tip ends thereof are separated from each other. Note that a traveling member 30, the details of which will be described later, is inserted into the gaps of the lower rail 12 and the upper rail 13, respectively.

[0028] On the upper surface of the lower rail 12, a running roller rolling surface 12a is formed in a downward arc-shaped concave manner. On the other hand, on the lower surface of the upper rail 13, a center roller rolling surface 13a that is concave upward in an arc shape is formed.

[0029] On the upper side of the upper rail 13, a closer mounting portion 14 defined in a substantially rectangular shape by the upper surface of the upper rail 13 is provided. A closer 60, the details of which will be described later, is mounted at a predetermined position in the left-right direction on this closer mounting portion 14. In Fig. 5, the closer 60 is omitted from the drawing.

[0030] The mounting protrusion 11a has its lower surface overlapped with the upper surface of the ceiling portion 5 of the food display shelf body 2, and the upper guide rail 10 is fixed to the ceiling portion 5 by fastening a screw (not shown) from above. Further, as shown in FIGS. 2 and 3, a decorative cover 20 is detachably attached to the mounting protrusion 11a and the decorative cover fixing protrusion 11b so as to cover the front side and the upper side of the upper guide rail 10.

[0031] Also, a closer 60 shown in FIG. 6 is attached to the closer attachment portion 14 of the upper guide rail 10 at a predetermined position in the left - right direction. In this closer 60, an engaging body moving long hole 62 extending from the end on the door - opening side toward the door - closing side is formed below the substantially rectangular parallelepiped - shaped main body portion 61. When the front door 3a is closed, a catching protrusion piece 32 of a traveling member 30 (details will be described later) enters the engaging body moving long hole 62 (see FIG. 5) and is engaged and caught by a locking body 63 provided in the main body portion 61. This locking body 63 operates to forcibly draw the catching protrusion piece 32 slowly toward the door - closing side by a retracting spring member (not shown) and a buffer damper (not shown) provided in the main body portion 61. As a result, the front door 3a suspended by the traveling member 30 is forcibly moved to the completely closed position.

[0032] Note that the above - described closer 60 is the same as that used in a general sliding door device in which the opening and closing door is attached substantially vertically. Since the internal structure, the attachment position, the functions and actions of this closer 60 are known technologies, detailed descriptions thereof are omitted.

[0033] As shown in FIG. 7, a lower roller 7 is provided at the lower portion of the inclined door 3. This lower roller 7 is obliquely placed on the rolling surface of a lower guide rail 8 arranged at the front tip portion of the shelf portion 4a, and can freely move in the left - right direction along the lower guide rail 8 when opening and closing the front door 3a.

[0034] FIG. 8 is a front view showing a state in which the hook attachment member 40 is attached to the traveling member 30, and FIG. 9 is a plan view of FIG. 8. Further, FIG. 10 is a perspective view of FIG. 8 as viewed from the front upper diagonal side, and FIG. 11 is a perspective view of FIG. 8 as viewed from the rear upper diagonal side. Furthermore, FIG. 12 is a perspective view of the center roller unit 70 disassembled from the state of FIG. 10.

[0035] As shown in FIG. 5, the traveling member 30 is inserted into the upper guide rail 10 from the end of the upper guide rail 10 inside the upper guide rail 10. The traveling member 30 located on the front side is for suspending the front door 3a of the tilt door 3 downward, and the traveling member 30 located on the rear side is for suspending the rear door 3b of the tilt door 3 downward. These traveling members 30 can move freely in the left-right direction along the upper guide rail 10 by the traveling roller 34 and the center roller 35, which will be described in detail later, rolling on the rolling surfaces of the lower rail 12 and the upper rail 13.

[0036] Note that, as shown in FIG. 5, the traveling member 30 is configured symmetrically with respect to the center line CL of the guide rail main body 11 of the upper guide rail 10. Therefore, in the following description, the front traveling member 30 will be described, and the description of the rear traveling member 30 will be omitted. Also, since all the functions of the parts and members used in the traveling member 30 are the same, they will be described with the same reference numerals.

[0037] As shown in FIGS. 8 to 12, the traveling member 30 includes a main body portion 31 formed by bending a sheet metal into a substantially L shape, and this main body portion 31 is composed of an upright portion 31a extending in the vertical direction and a horizontal portion 31b extending in the front-rear direction.

[0038] On the left side of the upright portion 31a, a catching protrusion 32 protruding upward from its upper end is provided. A cushioning member (not shown) such as rubber is attached to the catching protrusion 32 so as to cover its outer periphery.

[0039] As shown in Fig. 12, a substantially rectangular notch 33, which is notched downward from the upper edge, is formed at a position slightly to the right of the center in the left - right direction of the standing portion 31a. Further, on both sides in the left - right direction with the notch 33 interposed therebetween, two rotating shafts 34a, 34a are respectively provided so as to protrude toward the front side in the front - rear direction of the standing portion 31a, and traveling rollers 34, 34 are rotatably attached to these rotating shafts 34a, 34a.

[0040] Also, as shown in Fig. 12, a center roller unit 70, the details of which will be described later, is attached to the notch 33 of the standing portion 31a so as to be fitted from the upper side to the lower side.

[0041] As shown in Fig. 8, a mounting pin 36 extending downward from the lower surface is attached to the horizontal portion 31b of the traveling member 30, and a hook - attaching member 40 is detachably attached to this mounting pin 36. A hook member (not shown) having a length substantially equal to the left - right length of the front door 3a is attached to this hook - attaching member 40, and the upper portions of the tilt doors 3a, 3b are hooked in a manner that allows easy attachment and detachment, and is attached at an arbitrary tilt angle according to the tilt of the opening portion of the food display shelf body 2.

[0042] Fig. 13 is an exploded perspective view showing the center roller unit 70 of Fig. 12 alone, and Fig. 14 is a perspective view of Fig. 13 seen from the rear. As shown in Figs. 13 and 14, the center roller unit 70 is composed of a unit body 71 formed of a resin material, a rotating shaft 35a extending in the front - rear direction, a center roller 35 attached to the front side of the rotating shaft 35a, and a large - diameter washer 75 attached to the rear side of the rotating shaft 35a.

[0043] In the central part of the unit main body 71, a unit-side notch 72 is formed extending downward from its upper edge. Also, on the back side of the unit main body 71, as shown in Fig. 14, a back plate portion 74 is formed. This back plate portion 74 extends in a plate shape in the left-right direction and downward from the peripheral edge of the unit-side notch 72 at a position separated by the thickness of the upright portion 31a without closing the unit-side notch 72. By this back plate portion 74, fitting grooves 74a for fitting with the upright portion 31a are respectively formed on the left and right and the lower side of the unit-side notch 72.

[0044] Also, as shown in Figs. 13 and 14, the unit main body 71 is provided with an elastic holder portion 73 located inside the unit-side notch 72 and integrally formed continuously only with the right side of the unit-side notch 72. More specifically, the elastic holder portion 73 is composed of a cylindrical portion 73a having a flat surface in the front-rear direction and an elastic portion 73b that is constricted (has a reduced wall thickness) from a part of the circumferential portion of this cylindrical shape and is continuous with the right end face of the unit-side notch 72. The cylindrical portion 73a is adapted to move in the vertical direction by the elasticity of the elastic portion 73b. Further, a shaft mounting hole 73c penetrating in the front-rear direction is formed at the center of the cylindrical portion 73a.

[0045] On the inner side portion of the unit-side notch 72, as shown in Figs. 13 and 14, an inner protrusion 74b is provided protruding inward from the edge of the plate thickness portion of the notch. This inner protrusion 74b is formed continuously along the edge of the notch, enhancing the rigidity so as not to break when bending stress acts on the unit main body 71.

[0046] Further, the protruding length of the inner protrusion 74b is determined such that the inner dimension of the unit-side notch 72 including the inner protrusion 74b is smaller than the diameter of the center roller 35. That is, the center roller 35 is prevented from physically moving from the front side of the upright portion 31a through the unit-side notch 72 to the rear side. Such a configuration is adopted to prevent the center roller 35 from entering the interior of the food display shelf body 2 from the rear side of the upright portion 31a through the unit-side notch 72 even if the elastic portion 73b is damaged and the center roller 35 comes off by any chance.

[0047] Furthermore, on the front side of the unit body 71 and below the unit-side notch 72, as shown in FIG. 13, a front lower protrusion 74c protruding toward the front is provided. As shown in FIG. 5, the front lower protrusion 74c is disposed at a position facing the inner end surface of the lower rail 12 with a gap in the front-rear direction in a state where the traveling member 30 is assembled in the upper guide rail 5. The protruding length of the front lower protrusion 74c is adjusted such that when a large force such as a person's weight is applied to the tilt door 3, it abuts against the inner end surface of the lower rail 12 so that the upright portion 31a (particularly, the catching protrusion piece 32) can maintain a vertical posture.

[0048] In addition, on the upper side of the front side of the unit body 71, a front upper protrusion 74d is formed at a position facing the inner end surface of the upper rail 13 with a gap in the front-rear direction, similar to the front lower protrusion 74c. The protruding length thereof is adjusted such that when a large force acts on the tilt door 3, it abuts against the inner end surface of the upper rail 13 so that the upright portion 31a can maintain a vertical posture.

[0049] The rotary shaft 35a is inserted into the shaft mounting hole 73c of the elastic holder portion 73 from the front side. The center roller 35 is rotatably attached to the rotary shaft 35a from the front side of the rotary shaft 35a. Further, a large-diameter washer 75 is attached to the rear side of the rotary shaft 35a.

[0050] This large-diameter washer 75 is in contact with the plane on the rear side of the cylindrical portion 73a in a state of being attached to the rotating shaft 35a. Further, in a state of being attached to the rotating shaft 35a, the large-diameter washer 75 is formed to have a large diameter such that the peripheral edge portion of the large-diameter washer 75 abuts against the rear surface portion of the inner protruding portion 74b. Thereby, the position of the center roller 35 in the front-rear direction is regulated, the inclination of the center roller 35 in the front-rear direction is prevented, and the center roller 35 is prevented from moving in the front-rear direction.

[0051] When the center roller unit 70 is attached to the traveling member 30, as shown in FIG. 8, the center roller 35 is disposed between the two left and right traveling rollers 34, 34. At this time, the position of the center roller 35 in the height direction is disposed at a position higher by the dimension L1 than the traveling rollers 34, 34.

[0052] Further, as shown in FIG. 9, the position of the center roller 35 in the front-rear direction is the same as that of the traveling rollers 34, 34, and the three rollers 34, 34, 35 are arranged so as to be substantially in a straight line.

[0053] These traveling rollers 34, 34 and the center roller 35 have the same diameter, and their outer peripheral shapes are formed in an arc shape with a bulged central portion, as shown in FIGS. 5 and 9. On the other hand, the shapes of the traveling roller rolling surfaces 12a and the center roller rolling surface 13a of the upper guide rail 10 are also formed in accordance with the arc shapes of these rollers 34, 35.

[0054] Note that although the same traveling rollers 34, 34 and the center roller 35 are used, different reference numerals are given because their functions are different.

[0055] The diameters of the traveling rollers 34 and the center roller 35 are formed to be slightly smaller than the distance in the height direction between the traveling roller rolling surface 12a and the center roller rolling surface 13a. It is preferable to set the gaps between the lower rail 12 and the upper rail 13 and the traveling rollers 34 and the center roller 35 to be as small as possible.

[0056] Next, the operation and function of the food display shelf 1 having the inclined door according to the embodiment of the present invention will be described in detail. FIG. 15 is a front view for explaining the vertical movement of the center roller 35, where (A) shows the normal state and (B) shows the state of moving downward. Since the front door 3a and the rear door 3b have the same operation and function, the front door 3a will be described in the following explanation.

[0057] As shown in FIG. 15(A), in the normal state, the height position of the center roller 35 is higher than the position of the traveling roller 34 by a dimension L1. In this state, the height dimension from the lowest point of the traveling roller 34 to the highest point of the center roller 35 is larger than the height dimension from the traveling roller rolling surface 12a to the center roller rolling surface 13a.

[0058] On the contrary, in the state where the traveling member 30 is incorporated into the upper guide rail 10, as shown in FIG. 15(B), the center roller 35 is suppressed downward by the center roller rolling surface 13a. That is, the center roller 35 is in a state where the center roller rolling surface 13a is biased upward by the elasticity of the elastic holder portion 73.

[0059] In this state, the traveling roller 34 always contacts the traveling roller rolling surface 12a, and the center roller 35 always contacts the center roller rolling surface 13a. Therefore, even if there are manufacturing errors or mounting errors, no gaps or rattles that would cause the traveling member 30 to tilt will occur.

[0060] Also, as shown in FIGS. 1 to 3, when the front door 3a is attached in an inclined state, a force acts on the traveling member 30 to be pulled obliquely downward in the front direction along the inclination of the front door 3a due to the weight of the front door 3a. As a result, a clockwise rotational moment acts on the traveling member 30 in the direction of falling backward.

[0061] Even if such a rotational moment acts, the rotational moment can be reduced by the biasing force upward of the center roller 35, so that the traveling member 30 is less likely to tilt.

[0062] Also, due to the biasing force described above, the traveling roller 34 is maintained in a state of not contacting with a slight gap from the center roller rolling surface 13a, and the center roller 35 is maintained in a state of not contacting with a slight gap from the traveling roller rolling surface 12a. That is, since the rollers 34 and 35 can be made to travel with only a slight gap, even if the above-described rotational moment acts, the traveling member 30 will tilt only by this slight gap. Further, as shown in FIG. 5, the traveling roller 34 and the center roller 35 are biased and travel in a manner of fitting into the concave portions formed in an arc shape of the traveling roller rolling surface 12a and the center roller rolling surface 13a, so that the front-back direction swing during the traveling of the upper guide rail 10 and the traveling member 30 is suppressed.

[0063] According to the food display shelf 1 having the tilt door according to the embodiment of the present invention, the upper guide rail 10 is provided with a lower rail 12 and an upper rail 13 that extend along the opening and closing direction of the tilt door 3 and are spaced apart in the vertical direction. The tilt door 3 is provided with a traveling roller 34 that contacts the lower rail 12 and rolls with a gap from the upper rail 13, and a center roller 35 that contacts the upper rail 13 by being biased upward and rolls with a gap from the lower rail 12. Therefore, the traveling roller 34 always contacts the traveling roller rolling surface 12a, and the center roller 35 always contacts the center roller rolling surface 13a. Therefore, even if there are manufacturing errors or mounting errors, no gaps or play that would cause the traveling member 30 to tilt are generated. Also, due to the biasing force upward of the center roller 35, the traveling member 30 is less likely to tilt.

[0064] On the side of the inclined door 3, a traveling member 30 is provided for suspending the inclined door 3 in an offset state. The traveling member 30 includes a traveling roller 34 and a center roller unit 70 in which a center roller 35 is attached to a unit body 71 made of an elastic resin, and the center roller 35 is biased upward by the elasticity of the unit body 71. By configuring the main body portion 31 of the traveling member 30 and the center roller unit 70 as separate members, the center roller unit 70 can be easily attached to and detached from the traveling member 30. In addition, an upward biasing force can be applied to the center roller 35 with a simple structure without using an elastic member such as a spring.

[0065] Furthermore, the unit body 71 is provided with a unit-side notch 72 and an elastic holder portion 73 that protrudes from the end face of the unit-side notch 72 toward the inside of the unit-side notch 72. Since the center roller 35 is attached to the elastic holder portion 73, the elastic holder portion 73 can be provided compactly inside the unit-side notch 72. Therefore, the outer shape of the traveling member 30 can be configured to be the same size as before.

[0066] In addition, the unit body 71 is provided with an inner protrusion 74b that faces the lower rail 12 with a gap when the traveling member 30 is assembled to the upper guide rail 10. When a rotational moment acts on the traveling member 30, the inner protrusion 74b can contact the lower rail 12 to prevent the traveling member 30 from tilting from the upright posture.

[0067] Furthermore, the unit-side notch 72 is provided with an inner protrusion 74b that protrudes toward the inside of the unit-side notch 72. A large-diameter washer 75 that contacts the inner protrusion 74b is provided on the rotation shaft 35a of the center roller 35 to restrict the inclination of the center roller 35. Therefore, the center roller 35 can be prevented from tilting in the front-rear direction. In addition, since the large-diameter washer 75 receives the force in the front-rear direction acting on the elastic holder portion 73, it is possible to prevent the elastic portion 73b from being damaged by a large force acting thereon.

[0068] As described above, the cabinet having the inclined door according to the embodiment of the present invention has been described. However, the present invention is not limited to the described embodiment, and various modifications and changes are possible based on the technical idea of the present invention.

[0069] For example, in the present embodiment, as an example of a cabinet in which an opening / closing door is attached at a position offset toward the front side of the upper guide rail 10, the cabinet 1 having the inclined door 3 attached so as to cover the inclined opening has been described. However, the present invention is not limited to this. For example, even in a cabinet having an opening / closing door formed in a substantially L shape, the same problem occurs as long as the opening / closing door is attached at a position offset with respect to the upper guide rail. Therefore, by adopting the structure described in the present embodiment, the closer 60 can be operated smoothly in the same manner as in the present embodiment.

[0070] In addition, in the present embodiment, two traveling rollers 34 and one center roller 35 are provided, but the number is not limited to this. For example, the number of attached traveling rollers 34 and center rollers 35 can be increased or decreased depending on the weight, size, etc. of the front door 3a.

[0071] In addition, in the present embodiment, the center roller 35 is arranged between the two traveling rollers 34, but other arrangements may be used. For example, the center roller 35 may be arranged at a position outside the left-right direction of the traveling roller 34. Also, two (or two or more) center rollers 35 may be arranged between the two traveling rollers 34.

[0072] Furthermore, in the present embodiment, the center roller 35 is biased against the center roller rolling surface 13a so that the center roller 35 rotates while always being in contact with the center roller rolling surface 13a. However, it may be configured with a member other than a roller. For example, instead of the center roller 35, a block-shaped low-friction sliding member can be used, and this sliding member can be slid while being biased against the center roller rolling surface 13a. In this case, the shape of the upper end portion of the sliding member is formed to match the arc shape of the center roller rolling surface 13a, and by sliding it in a fitting manner, the front-back vibration during the running of the upper guide rail 10 and the running member 30 can be suppressed.

[0073] On the other hand, in the present embodiment, the food display shelf 1 is described as an example of a cabinet. However, as long as it is used with a door attached at an offset position, it can be used for various things such as a document shelf and a storage shelf.

Explanation of Reference Numerals

[0074] 1 Food display shelf (cabinet) 2 Food display shelf body (cabinet body) 3 Tilt door (opening / closing door) 3a Front door 3b Rear door 4a, 4b Shelf part 5 Ceiling board 6 Door attachment member 6a Engagement part 7 Lower roller 8 Lower guide rail 10 Upper guide rail 11 Guide rail body 11a Attachment protrusion 11b Cosmetic cover fixing protrusion 12 Lower rail 12a Running roller rolling surface 13a Center roller rolling surface 13 Upper rail 14 Closer attachment part 20 Cosmetic cover 30 Running member 31 Body part 31a Upright part 31b Horizontal part 32 Catch protrusion 34 Travel roller 34a Rotation axis 35 Center roller 35a Rotation axis 36 Mounting pin 40 Hook mounting member 60 Closer 61 Body part 62 Mating body movement slot 63 Locking body 70 Center roller unit 71 Unit body 72 Unit side notch (notch) 73 Elastic holder part 73a Cylindrical part 73b Elastic part 73c Shaft mounting hole 74 Back plate part 74a Fitting groove 74b Inner protrusion 74c Front lower protrusion (protrusion) 74d Front upper protrusion (protrusion) 75 Large-diameter washer (restricting member) L1 Movement amount in the vertical direction CL Center line

Claims

Claim 1 A cabinet having an upper guide rail for supporting the upper part of an opening / closing door, the opening / closing door being attached at a position offset to the front side of the upper guide rail, the opening / closing door being a sliding door, and comprising a closer for forcibly moving the opening / closing door to a closed position when the opening / closing door is closed, wherein the upper guide rail is provided with a lower rail and an upper rail extending along the opening / closing direction of the opening / closing door and spaced apart in the vertical direction, wherein the opening / closing door is provided with a running roller that contacts the lower rail and rolls with a gap from the upper rail, and a center roller that contacts the upper rail by being biased upward and rolls with a gap from the lower rail, wherein a running member is provided on the opening / closing door side and is suspended in a state where the opening / closing door is offset, the running member comprising the running roller, a center roller unit in which the center roller is attached to an elastic unit body and the center roller is biased upward by the elasticity of the unit body, wherein the unit body is provided with a notch and an elastic holder portion protruding from an end surface of the notch toward the inside of the notch, and the center roller is attached to the elastic holder portion. A cabinet characterized by this. Claim 2 The cabinet according to claim 1, wherein the unit body is provided with a protrusion that faces the lower rail or the upper rail with a gap in a state where the running member is assembled to the upper guide rail. Claim 3 The cabinet according to claim 2, wherein the notch is provided with an inner protrusion protruding toward the inside of the notch, and a regulating member that contacts the inner protrusion and regulates the inclination of the center roller is provided on the rotation axis of the center roller.

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