JP3886371B2 - Storage door structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a door structure of a storage, and more specifically, a slide door is slidably supported with respect to a lower rail disposed at an inner peripheral lower portion of an opening portion opened in a main body, and the opening is opened by the slide door. It is related with the door structure of the storehouse comprised so that a part might be opened and closed.
[0002]
[Prior art]
Refrigerated showcases (stores) that store and display stored items such as foods and beverages in a refrigerated state are suitably used in grocery stores and convenience stores. In this refrigerated showcase, a storage chamber for the stored items is defined inside a heat insulating box as a main body in which a foam heat insulating material such as urethane is filled between an inner box and an outer box. In addition, a rectangular opening that opens to the front is opened at the front of the heat insulation box, and the opening is opened and closed between the upper and lower rails arranged at the upper and lower inner periphery of the opening. Before and after the sliding door is slidably supported.
[0003]
The slide door is configured by fitting a transparent glass plate inside a rectangular frame body, and rollers are respectively provided near both ends of the slide door in the sliding direction at the lower part of the frame body. The sliding door is configured to be slidable along the lower rail through the rollers by placing the pair of rollers movably on the lower rail.
[0004]
[Problems to be solved by the invention]
When storing the stored items in the storage room, especially in the type in which the shelf column is installed in the central part of the storage room, the load is applied to the central part of the heat insulating box. May be bent. In this case, in a no-load state in which stored items are not stored in the storage chamber, if the slide door is mounted in a correct posture not inclined with respect to the lower rail, the slide slides as the lower rail is bent. The door will also tilt. When the lower rail center side of the slide door is tilted in this manner, the upper portion of the door is separated from the inner edge of the opening and a gap is generated. A side rail is provided on the inner edge of the opening to cover the front side of the sliding door to some extent, but if the inclination increases, the gap at the top of the door will also widen and become visible from the front. Causes cold air leakage from
[0005]
Therefore, the inventor searched for a solution to the above problem, and in the no-load state, the inventor can cope by inclining the sliding door in the reverse direction that can cancel the inclination that occurs when the load state is reached. I came to know that. That is, when the lower rail is provided with a drop portion, and the opening is fully closed with a sliding door in the no-load state, the roller close to the inner edge of the opening in the door is attached to the drop portion so that the load state The sliding door is tilted in advance in the direction opposite to the tilting direction.
[0006]
In this case, assuming the maximum load on the refrigerated showcase, that is, the case where the central part of the lower rail is bent to the maximum, the position of the roller with respect to the slide door is determined and the tilt angle in the no-load state is set. It was. However, there are various situations in which the refrigerated showcase is actually used, especially when it is used in a state close to no load, due to the inclination given in advance, between the lower part of the door and the inner edge of the opening. A large gap is generated, and there is a possibility that cooling efficiency may be lowered due to cold air leakage from the gap, and how to solve this has become a new problem.
[0007]
OBJECT OF THE INVENTION
In view of the above-described problems inherent in the above-described conventional technology, the present invention has been proposed to suitably solve this problem, and by adjusting the arrangement position of the rollers according to the use situation, It is an object of the present invention to provide a storage door structure that can reduce a gap generated between a sliding door and an inner edge of an opening, and prevent a decrease in cooling efficiency due to cold air leakage.
[0008]
[Means for Solving the Problems]
In order to overcome the above-mentioned problems and achieve the intended purpose, the storage door structure according to the present invention includes:
A sliding door, in which a pair of rollers spaced apart in the left-right direction are rotatably disposed at the lower part, is disposed on the lower inner periphery of the opening formed in the main body, and the roller is attached to the lower rail extending in the left-right direction. In a storage that is slidably supported through, and configured to open and close the opening by sliding the sliding door in the left-right direction along the lower rail,
The lower rail is formed with a drop portion where only one of the rollers adjacent to the inner edge side of the left or right side of the opening in the sliding door facing the fully closed position with respect to the opening is settled,
The sliding door is stored in the storage chamber when no load is stored in the storage chamber defined in the main body and only one of the rollers is settled in the drop-in portion. has been the lower rail when a load state the upper end of one of the roller side of the sliding door is opposite to the direction in which the slide door is tilted by flexing downwardly of said one of said opening It is set to tilt at a predetermined angle in the direction approaching the inner edge side ,
The tilt angle of the sliding door can be adjusted by adjusting the position of the roller with respect to the sliding door in the sliding direction of the sliding door .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, the door structure of the storage according to the present invention will be described with reference to the accompanying drawings by giving a preferred embodiment. FIG. 1 schematically shows a main part of a slide door according to the embodiment, and FIGS. 2 and 3 show an entire configuration of a refrigerated showcase as a storage according to the embodiment.
[0010]
As shown in FIGS. 2 and 3, the refrigerated showcase 10 according to the embodiment includes a heat insulating box 12 as a main body in which a foam heat insulating material such as urethane is filled between an interior plate and an exterior plate, and the box. It is basically composed of a chassis 14 on which the body 12 is placed. A refrigeration device 16 including a compressor and a condenser is housed in a machine room defined in the chassis 14.
[0011]
A cooler 18, a cold air circulation device 20, and the like to which a refrigerant is circulated and supplied from the refrigeration device 16 are disposed above the heat insulation box 12. The storage chamber 22 defined inside is cooled. In the storage chamber 22, shelf members 24 on which stored items such as foods and beverages are arranged and placed are arranged in multiple stages in the vertical direction. A shelf column 26 is erected at the center of the storage chamber 22 in the width direction (left and right direction in FIG. 2), and the shelf member 24 is placed in a horizontal posture by a shelf holder 28 detachably attached to the shelf column 26. It can be installed.
[0012]
A rectangular opening 12a that opens to the front is formed in the front portion of the heat insulation box 12, and an upper frame 30, side frames 32 and 34, and a lower frame 36 are disposed on the inner periphery of the opening 12a. Has been. The front and rear sliding doors 38 and 40 are supported by the upper frame 30 and the lower frame 36 so as to be slidable in the left and right directions, respectively, so that the opening 12a can be opened and closed. As shown in FIG. 5, the lower frame 36 is provided with two lower rails 42 and 42 erected on the upper surface of the bottom plate 36a in the front-rear direction, each extending parallel to the longitudinal direction (left-right direction). Exist. The corresponding slide doors 38, 40 are slidably supported by the rails 42 via a pair of rollers 60, 60, which will be described later, disposed below the rails 42. A rising portion 36b is provided at the front end edge of the bottom plate 36a over the entire length in the longitudinal direction, and the rising portion 36b covers the support portion of the roller 60 by the lower rail 42 from the front side. In the embodiment, as shown in FIG. 2, the front slide door 38 is configured to close the right half of the opening 12a, and the rear slide door 40 is configured to close the left half of the opening 12a.
[0013]
The left and right side frames 32, 34 are formed with extending portions 32 a, 34 a extending to the opening side (the other side frame side) with a predetermined length at their front end edges over the entire length in the vertical direction, When the corresponding sliding doors 38, 40 are brought to the fully closed position with respect to the opening 12a, the corresponding side edge portions of the doors 38, 40 can be covered from the front side.
[0014]
Since the basic configuration of the two slide doors 38 and 40 positioned in the front and rear is the same, the configuration of the front slide door 38 positioned on the right side in FIG. 2 will be described, and the rear slide door 40 positioned on the left side will be described. The same members are denoted by the same reference numerals, and detailed description thereof is omitted.
[0015]
As shown in FIG. 4 or 5, the front slide door 38 includes a transparent body 44 made of two transparent rectangular plates made of glass, synthetic resin, or the like, and left and right and upper and lower sides of the transparent body 44. And a synthetic resin frame 46 disposed on the outer periphery of the frame. The front slide door 38 is set to a size that allows the right half of the opening 12a to be substantially closed, and closes the opening 12a by bringing the right end of the frame 46 into contact with the inner surface of the right frame 34. (Fully closed position). The frame 46 includes a left frame member 46a and a right frame member 46b disposed on the left and right outer edges of the transparent body 44, and an upper frame member 46c disposed on the upper and lower outer edges of the transparent body 44 and the lower frame member 46b. It is comprised from the frame material 48. FIG. Note that a handle 50 protruding forward is formed in a required length in the vertical direction on the right frame member 46b of the front slide door 38 (on the left frame member 46a in the rear slide door 40).
[0016]
As shown in FIG. 5, a rectangular groove 51 that opens downward is formed on the lower frame member 48 that constitutes the frame body 46 over the entire length in the longitudinal direction (left-right direction) that is the extending direction of the lower rail 42. On the front and rear inner surfaces facing in the direction intersecting the lower rail 42 near the lower end of the square groove 51, convex portions 52, 52 projecting inward at a predetermined length are required lengths in the longitudinal direction from the left and right side ends. It extends so as to extend in parallel with the lower rail 42. A plurality of (two in the embodiment) roller sets 54 to be described later are detachably accommodated in a space defined between the bottom 51a of the square groove 51 and the two convex portions 52, 52. The
[0017]
The square groove 51 of the lower frame member 48 is open at both ends in the longitudinal direction (both ends in the extending direction of the lower rail 42), and the roller set 54 is accommodated in the space from the side end opening portion. ing. Further, as shown in FIG. 6, one piece 55 a of an L-shaped fixture 55 is inserted into the gap defined above the bottom 51 a in the square groove 51 from the side end opening portion. By screwing the screw 56 for positioning and fixing the roller set 54 into the corresponding screw hole 55c, the piece 55a is fixed in a state where it is placed on the bottom 51a. The other piece 55b of the fixing bracket 55 is positioned so as to close the side end opening of the lower frame member 48, and the lower portion of the right frame member 46b is fixed to the piece 55b via a screw 57. It is configured as follows.
[0018]
As shown in FIG. 1, the roller set 54 disposed on the lower frame member 48 includes an attachment member 58 formed by bending a rectangular flat plate into a U-shape, and a support shaft 59 on the attachment member 58. It is comprised from the roller 60 pivotally supported. On the vertical plates 58a and 58a facing the front and rear of the mounting member 58, U-shaped receiving portions 58b and 58b that open downward (to the convex portion 52 side) are formed at required positions on the lower end edges thereof. Both end portions 59a and 59a of the support shaft 59 inserted through the central through hole 60a project from the roller 60 are supported by the receiving portions 58b and 58b in a state where movement in the longitudinal direction (left and right direction) is restricted. Configured to be. The depth dimension of the receiving portion 58b is set to be substantially the same as the diameter of the shaft end portion 59a of the support shaft 59. Further, the horizontal plate 58c facing between the vertical plates 58a and 58a of the mounting member 58 has a plurality of (two in the embodiment) extending in the longitudinal direction (sliding direction of the sliding doors 38 and 40) by a predetermined length. The long holes 58d are formed at predetermined intervals in the longitudinal direction.
[0019]
The height of the mounting member 58 is set to be substantially the same as the distance between the bottom 51a of the square groove 51 and the convex portions 52, 52 in the lower frame member 48, and the mounting plate 58 has a horizontal plate 58c. When stored in the space from the open side end portion of the square groove 51 so as to face the bottom 51a, the lower ends of the vertical plates 58a, 58a are configured to abut against the convex portions 52, 52 ( (See FIG. 6). In this state, the shaft end portions 59a and 59a of the support shaft 59 are restricted from moving in the longitudinal direction by the receiving portions 58b and 58b, and the convex portions are located on the open side of the receiving portions 58b and 58b. It is received at 52, 52 and is prevented from being removed.
[0020]
In the bottom 51a of the square groove 51 in the lower frame member 48, through holes 51b are formed at positions corresponding to the respective long holes 58d provided in the horizontal plate 58c of the mounting member 58, and both holes 58d, 51b are formed. The roll assembly 54 is positioned and fixed at the mounting position of the lower frame member 48 by screwing screws 56 inserted from the horizontal plate side into the screw holes 55c of the fixing bracket 55 (FIG. 6). Further, by loosening the screws 56, 56, the position of the mounting member 58, that is, the roller 60, can be moved and adjusted with respect to the lower frame member 48 in the sliding direction (longitudinal direction) of the front sliding door 38. .
[0021]
As shown in FIG. 7, the convex portions 52, 52 of the lower frame member 48 are located from the position where the support shaft 59 is supported when the roller assembly 54 is attached to the attachment position of the lower frame member 48. Cutout portions 52 a and 52 a that allow the support shaft 59 to pass therethrough are formed at portions that are separated (portions that are separated from the side end opening portion). Further, the separation width of both convex portions 52 and 52 is set to be larger than the axial dimension of the roller 60, and the support shaft 59 with respect to the angular groove 51 and the support shaft 59 are aligned with the notches 52a and 52a. The roller 60 can be taken out and attached.
[0022]
As shown in FIG. 8, the lower rail 42 in the lower frame 36 is formed with a drop portion 61 whose top position is set lower than the other portion by a predetermined height at a position close to the right frame 34. The right side (one side) roller 60 close to the side close to the right side frame 34 (the inner edge side of the opening) in the front sliding door 38 facing the fully closed position with respect to the opening 12a settles on the drop part 61. It is set as follows. In this state, as shown in FIGS. 9 and 10, the front sliding door 38 is inclined at a predetermined angle so that the upper right end of the door approaches the right frame 34, that is, the right lower end of the door separates from the right frame 34. It is set as follows.
[0023]
The front sliding door 38 is inclined when the central portion in the width direction of the lower rail 42 (lower frame 36) bends downward due to a load of stored items stored in the storage chamber 22 or the like. The tilt angle is opposite to the tilting direction, and the tilt angle can be changed by adjusting the positions of the pair of rollers 60 and 60 disposed on the door 38. That is, when the pair of rollers 60, 60 are fixed so as to be closest to each other (FIG. 9), an angle that can cancel the inclination in the load state when the central portion of the lower rail 42 is bent downward to the maximum. Can be adopted. In addition, the inclination when the pair of rollers 60 and 60 are positioned and fixed so as to be separated from each other is set slightly (FIG. 10). In this state, the open end of the right frame member 46b (the right end of the frame 46) is the right side. It is set so as not to protrude from the extended portion 34a of the frame 34 to the inner side (opening side) and to form a large gap.
[0024]
A drop portion 61 for the rear slide door 40 is formed at a position close to the left frame 32 in the lower rail 42. The relationship between the drop portion 61 and the rear slide door 40 is reversed in each direction. Only in the case of the front slide door 38 described above.
[0025]
[Effect of the embodiment]
Next, the operation of the door structure according to the embodiment will be described in the case of the front slide door 38. As shown in FIG. 1, a roll set 54 in which the roller 60 is assembled to the mounting member 58 via a support shaft 59, and a bottom portion 51 a and both convex portions 52, 52 in the square groove 51 of the lower frame member 48. It accommodates in the space between from the side end opening part. The long holes 58d of the mounting member 58 and the corresponding through holes 51b of the lower frame member 47 are made to coincide with each other, and one piece 55a of the fixing bracket 55 is stored in the gap above the bottom 51a from the side end opening portion. The screw holes 55c are aligned with the holes 58d and 51b. In this state, the screw 56 inserted through the holes 58d and 51b is screwed into the screw hole 55c, whereby the roller set 54 is positioned and fixed at the mounting position of the lower frame member 47 (see FIG. 6).
[0026]
The front slide door 38 in which a pair of roller sets 54, 54 is disposed on the lower frame member 48 is assembled in the opening 12 a so that the rollers 60, 60 are placed on the lower rail 42 of the lower frame 36. When the front slide door 38 is positioned at the fully closed position where the right half of the opening 12a is closed, the right roller 60 settles on the drop portion 61 as shown in FIG. Tilts in the direction in which the upper right end of the door approaches the right frame 34.
[0027]
In the refrigerated showcase 10, when a stored item is placed and stored on the shelf member 24 disposed in the storage chamber 22, the load is applied to the inner bottom surface of the storage chamber 22, and the lower frame 36 bends downward. . In the case where the shelf column 26 for supporting the shelf member 24 is provided at the central portion in the left-right direction in the storage chamber 22 as in the embodiment, the central portion of the lower frame 36 bends downward. Therefore, in this case, the front slide door 38 supported by the lower rail 42 of the lower frame 36 via the rollers 60 and 60 is inclined so that the upper right end of the door is separated from the right frame 34. However, in the embodiment, the front slide door 38 is set in an unloaded state so as to incline in a direction opposite to the direction in which the front slide door 38 tilts in advance, so that both the inclinations are canceled out and the front slide door 38 is completely inclined. The gap between the upper and lower ends of the right frame member 46b and the right frame 34 is kept small, and the cooling effect is reduced by the leakage of cold air from the storage chamber 22. Is suppressed.
[0028]
Here, when the refrigerated showcase 10 is always used in a state where the maximum amount of stored items is stored, only a small amount of stored items are stored and used in a state close to no load. The situation varies. Therefore, by adjusting the positions of the pair of rollers 60 and 60 disposed on the front slide door 38 according to the use situation, it is possible to always use the best state.
[0029]
That is, since the pair of rollers 60 and 60 are normally positioned on the assumption that the lower rail 42 bends to the maximum as described above, as shown in FIG. 9, the front slide door 38 in an unloaded state is provided. The inclination angle is large, and the gap formed between the right frame member 46b and the right frame 34 is also large. Accordingly, when the refrigerated showcase 10 set in this way is used in a state close to no load, the lower rail 42 has a slight deflection, so that the reverse is such that the front slide door 38 cancels out the inclination in the no load state. There is no tilting in the direction, and there is a risk that cooling efficiency will be reduced due to cold air leakage from the gap. Therefore, at this time, the rollers 60 and 60 are positioned and fixed at a position farthest from the lower frame member 48. As a result, as shown in FIG. 10, the inclination of the front slide door 38 when the right roller 60 settles on the drop portion 61 is small, and the gap generated between the right frame member 46 b and the right frame 34 is also small. In addition, a decrease in cooling efficiency due to cold air leakage can be suppressed. In this state, the open end of the right frame member 46b is set so as to be covered by the extending portion 34a of the right frame 34, so that the occurrence of cold air leakage can be further suppressed.
[0030]
In addition, although the example demonstrated the case where the door structure was employ | adopted for the refrigerated showcase, this application is not limited to this, A freezer, a warm storage, etc. may be sufficient. Moreover, the main body having an opening in which the door structure is adopted may not be a heat insulating box, and may be configured to accommodate stored items at room temperature without cooling or heating.
[0031]
【The invention's effect】
As described above, according to the door structure of the storage according to the present invention, it is assumed that the slide door tilts in a predetermined direction due to the lower rail being bent downward in a load state in which stored items are stored in the storage chamber. Since the slide door is inclined in the reverse direction in the no-load state, the inclination in the load state is offset and the slide door is used in a substantially correct posture in the use state. In addition, the roller can be positioned with respect to the sliding door, so adjusting the tilt angle in the no-load state allows the sliding door to be in an optimal state according to the usage conditions such as the load size. It is possible to minimize the gap generated between the opening and the slide door, and for example, the occurrence of cold air leakage can be suppressed.
Further, since the tilt angle of the slide door when the roller is positioned and fixed at the most distant position is set slightly, the gap generated between the opening and the slide door in the no-load state can be reduced. Furthermore, in this state, since the side edge portion of the slide door is configured to be covered with the extending portion, the occurrence of cold air leakage can be further suppressed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an essential part of a sliding door according to an embodiment of the present invention in an exploded state.
FIG. 2 is a front view showing the refrigerated showcase according to the embodiment with a part omitted.
FIG. 3 is a longitudinal side view showing a refrigerated showcase according to an embodiment.
FIG. 4 is a partially cutaway front view showing a front slide door according to an embodiment.
FIG. 5 is a longitudinal sectional side view showing a portion where the lower rail is disposed according to the embodiment.
FIG. 6 is a longitudinal front view showing an attachment site of a roll group in the front slide door according to the embodiment.
FIG. 7 is a bottom view of a main part showing a front sliding door according to an embodiment.
FIG. 8 is a schematic front view showing a lower rail according to an embodiment.
FIG. 9 is a diagram illustrating a front slide door according to an embodiment, and is an explanatory diagram illustrating a posture in a no-load state when a pair of rollers are brought closest to each other.
FIG. 10 is a diagram illustrating the front sliding door according to the embodiment, and is an explanatory view illustrating a posture in a no-load state when a pair of rollers are most separated from each other.
[Explanation of symbols]
12 heat insulation box (main body), 12a opening, 22 storage chamber, 32 , 34 Side frame
32a , 34a Extension part, 38 Front slide door (slide door)
40 Rear slide door (slide door), 42 Lower rail, 60 rollers, 61 Recessed part

Claims (2)

A sliding door (38, 40) in which a pair of rollers (60, 60) spaced apart in the left-right direction is rotatably disposed at the lower part is provided at the lower part of the inner periphery of the opening (12a) opened in the main body (12). It is slidably supported via the rollers (60, 60) on the lower rail (42) that is disposed and extends in the left-right direction , and the sliding door (38, 40) is moved to the left and right along the lower rail (42). In the storage configured to open and close the opening (12a) by sliding in the direction ,
The lower rail (42) is provided with one roller (60) close to the inner edge of either the left or right of the opening (12a) in the sliding door (38, 40) facing the fully closed position with respect to the opening (12a). )落込portion only is settled (61) is formed,
In unloaded condition the storage, etc. are not stored therein image made the accommodating chamber (22) to said body (12), slide when the only one of the rollers (60) and settled in落込portion (61) door (38, 40), said lower rail when the reservoir or the like becomes a load state is received in the receiving chamber (22) (42) the slide door by bends downward (38, 40) The upper end on one roller (60) side of the sliding door (38, 40) , which is in the opposite direction to the tilting direction, is inclined at a predetermined angle in a direction approaching the one inner edge side of the opening (12a) . Is set to
The tilt angle of the slide door (38, 40) can be adjusted by adjusting the position of the roller (60, 60) relative to the slide door (38, 40) in the sliding direction of the slide door (38, 40). door structure reservoirs, characterized in that it is configured. The opening (12a) Side frames around the left and right inner perimeter (32,34) And the left and right side frames (32,34) From the opening with a predetermined length (12a) The sliding door that extends to the side and faces the fully closed position (38,40) Extension part that can cover the corresponding side edge of the front side (32a, 34a) Is both sides frame (32,34) The pair of rollers are formed on the front end edge of the roller over the entire length in the vertical direction (60,60) The one roller when the position is fixed closest (60) Is the drop part (61) The lower rail when settled on (42) The sliding door at an angle that can cancel the inclination in the load state when the central part of the door is bent downward to the maximum (38,40) And the pair of rollers (60,60) In the storage chamber (twenty two) One roller in a no-load state where stored items are not stored in (60) The drop part (61) When you settle on the sliding door (38,40) One of the rollers (60) The extension part to which the side edge part corresponds (32a, 34a) Covered from the front by the sliding door at a slight angle (38,40) The storage door structure according to claim 1, wherein the door is set to be inclined.

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