JPH018937Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an opening/closing device for a heat-insulating door in a refrigerator generally used for commercial purposes.

(Prior Art) Conventionally, the so-called slide opening/closing structure of this type of refrigerator has an entrance/exit opening 2 formed in the refrigerator 1 body, as shown in FIGS. 11 and 12.
A guide rail 3 is attached to extend laterally from the upper end, and a plurality of door rollers 5 are rotatably attached to the upper end of the heat-insulating door 4 in the width direction, and a circumferential annular recess formed in each door roller 5. The groove 6 was engaged on the guide rail 3, and the heat-insulating door 4 could be opened and closed by rolling the door roller 5 on the guide rail 3.

(Problems to be Solved by the Invention) According to the heat-insulating door opening/closing device described above, in order to fully open the opening 2, the guide rail 3 is required to have a length that is more than twice the width of the heat-insulating door 4. Since the guide rail 3 is attached to the outer wall surface of the refrigerator 1, the opening 2 can only be formed to be less than 1/2 of the frontage of the refrigerator 1. Therefore, compared to the size of the refrigerator 1,
It was not possible to form a very large opening 2, and it was troublesome to take items in and out.

(Means for solving the problem) Therefore, the present invention provides an opening/closing device with a structure that can form a large opening close to the frontage of the refrigerator. In a refrigerator in which a heat insulating door is movably suspended along a guide rail extending laterally from the upper end of an opening, the guide rail has a substantially U-shaped cross section and is interlocked with each other in the longitudinal direction. It consists of a fixed rail and a movable rail that are movable relative to each other.The fixed rail is fixed to the refrigerator main body, the heat-insulating door is attached to the movable rail, and the front end of the movable rail in the direction of closing the heat-insulating door is attached to the top of the fixed rail. In order to roll in contact with one of the lower rolling surfaces,
The movable door wheel is pivotally supported between the lower rolling surfaces, the fixed rail is located on the rear end side of the movable rail in the direction of closing the heat-insulated door, and the upper rolling motion of the movable rail is located at the front end of the fixed rail in the direction of opening the heat-insulated door. The fixed door rollers that abut and support the lower surface of the door rollers are each pivotally supported, and as the fixed rail and the movable rail move relative to each other, the guide wall, in which the circumferential annular groove formed in the movable door roller is guided by rolling, moves to the fixed rail. Protruding from the upper surface of the lower rolling surface along its longitudinal direction,
A guide wall, which is inserted into a circumferential annular groove formed in each fixed door roller so as to be relatively movable, is provided to protrude from the lower surface of the upper rolling surface of the movable rail along its longitudinal direction.

(Function) According to the present invention, the opening 12 formed by the heat-insulating door 34
In the closed state, the movable door roller 32 on one side of the movable rail 27 attached to the heat insulating door 34 moves against the lower rolling surface 2 of the fixed rail 17 fixed on the refrigerator main body 10 side.
1, the lower surface of the upper rolling surface 29 on the other side of the moving rail 27 is supported in contact with the fixed door roller 24,
Here, the heat insulating door 34 is suspended on the fixed rail 17 side. At this time, the guide wall 22 of the fixed rail 17 is inserted into the groove 33 of the movable door roller 32, and the movable rail 27 is inserted into the groove 26 of the fixed door roller 24.
The guide wall 31 is inserted.

When the heat-insulating door 34 is slid in the opening direction from this closed state, the upper rolling surface 29 of the movable rail 27 on the front side in the opening direction moves on the fixed door roller 24, and then moves on the fixed door roller 23 located in the front direction in the opening direction. Move astride both. On the other hand, the movable door wheel 32 on the rear side of the movable rail 27 in the opening direction rolls on the upper surface of the lower rolling surface 21 of the fixed rail 17. At this time, the guide wall 31 of the moving rail 27 is
5, 26 and is guided, and the concave groove 33 of the movable door roller 32 is inserted into the guide wall 2 of the fixed rail 17.
2 and is guided by rolling. By sliding in the opening direction, the front side of the movable rail 27 in the opening direction projects from the end of the fixed rail 17, and the front side of the heat shield door 32 in the opening direction projects from the end of the fixed rail 17. . If it slides further in the opening direction and the amount of protrusion of the heat insulating door 34 increases, the weight balance of the heat insulating door 34 will cause the movable door roller 32 to move toward the fixed rail 1.
7 comes to roll on the lower surface of the upper rolling surface 20. At this time as well, the groove 33 of the movable door roller 32 is guided in a rolling manner along the guide wall 22 of the fixed rail 17.

When the heat shield door 34 is fully opened,
On the rear side of the moving rail 27 in the opening direction, the upper rolling surface 2
The lower surface of 9 is supported by both fixed door rollers 23 and 24, and the movable door roller 32 is supported by the upper rolling surface 2 of the fixed rail 17.
0, and the moving rail 27 and the heat-insulating door 34 are supported here in a cantilever shape that protrudes greatly from the end of the fixed rail 17.

Next, by sliding the heat insulating door 34 in the closing direction, the initial closed state can be obtained by the reverse operation as described above.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings. In FIGS. 1 to 10, 10 is a refrigerator body, and the front wall 11 has an entrance/exit opening slightly narrower than the frontage. 12 are formed. The opening 12 is formed in a rectangular shape, and a cosmetic upper frame 13 and side frames 14 are provided on the top and both sides, respectively. As shown in FIG. 8, the upper frame 13
Along the upper edge, a support plate 15 having an L-shaped cross section is fixed with screws or the like, and the protruding end on one side is supported by a support bracket 16 bolted to the front wall 11, as shown in FIG. and the support plate 15
extends laterally from the upper end of the opening 12, and has a length that spans substantially the entire width of the frontage of the refrigerator main body 10. Reference numeral 17 denotes a fixed rail, which has a substantially U-shaped cross section, has the same length as the support plate 15, and has a side wall 18 fastened to the front side of the support plate 15 in an overlapping manner with screws 19 or the like. . Also side wall 1
Each wall protruding forward from the upper and lower edges of 8 constitutes an upper rolling surface 20 and a lower rolling surface 21. Furthermore, an upwardly projecting guide wall 22 is provided at the front end edge of the lower rolling surface 21 along its longitudinal direction.
Further, as shown in FIGS. 1, 6, 7, and 9, the support bracket 16 and the opening 12 are provided at the end of the fixed rail 17 on the support bracket 16 side.
Fixed door rollers 23, 2 are located above one side frame 14 of
4 are rotatably supported, and each fixed door wheel 23, 24 has a circumferential annular groove 2 on its outer peripheral surface.
5 and 26 are formed. In addition, each fixed door car 2
Lower rolling surface 2 of fixed rail 17 located at 3, 24
1 and the guide wall 22 are cut out. 2
Reference numeral 7 denotes a movable rail, which has a substantially U-shaped cross section and, like the fixed rail 17, includes a side wall 28, an upper and lower rolling surface 29, a lower rolling surface 30, and an upper rolling surface 2.
A downwardly protruding guide wall 31 is provided at the rear end edge of 9 along its longitudinal direction. and the first
As shown in FIGS. 4 and 8, the moving rail 27 has a length slightly longer than the width of the opening 12, and one end located on the opposite side of the fixed door wheels 23, 24 has a length slightly longer than the width of the opening 12. A movable door wheel 32 is rotatably supported, and a circumferentially annular groove 33 is formed on the outer peripheral surface of the movable door wheel 32. The fixed rails 17 and the movable rails 27 are interlocked with each other, and as shown in FIGS.
The guide wall 22 of the movable rail 27 is inserted into the groove 26 of the fixed door roller 24, and the guide wall 31 of the movable rail 27 is inserted into the groove 26 of the fixed door roller 24, so that the rails 17 and 27 are relatively movable along the longitudinal direction. By this relative movement, the guide wall 31 of the movable rail 27 is inserted into the groove 25 of the fixed door roller 23 and moved, as shown by the imaginary line in FIG. Furthermore, each of the fixed door wheels 23 and 24 comes into contact with the lower surface of the upper rolling surface 29 of the movable rail 27 and is moved relative to the lower surface of the upper rolling surface 29 of the movable rail 27, while the movable door roller 32
It is configured to abut against the lower surface of the upper rolling surface 20 or the upper surface of the lower rolling surface 21 of No. 7, and to be relatively moved through rolling motion. And each of the above rails 17, 2
7, one side of the movable rail 27 protrudes laterally from the end of the fixed rail 17, as shown in FIG. In addition, the thick side of each door car 23, 24, 32 is the rail 17, 27.
It is configured to roll in contact with each rolling surface 20, 21, 29 of.

Reference numeral 34 denotes a heat-insulating door, which is equipped with a heat-insulating material injected with urethane inside, and is formed into a rectangular shape that can open and close the opening 12 freely.
It is attached and fixed to the front surface of the side wall 28 of the moving rail 27 via letter-shaped suspension brackets 35 and 36. In addition, in order to improve the sealing performance between the heat insulating door 34 and the peripheral edge of the opening 12 and the floor surface 37, the heat insulating door 34 is
4 Appropriate packing material 38, 3 on the inner peripheral edge and lower surface
9 is provided. A concave guide rail 4 is provided at the lower end of the heat insulating door 34 as shown in FIG.
A roller 42 supported by a mounting bracket 41 mounted on a floor surface 37 is engaged with a guide rail 40 and is relatively movable. As shown in FIG. 8, a stopper piece 43 having an L-shaped cross section is fixed to the outer surface of the suspension bracket 35 located on the front side in the closing direction of the heat-insulating door 34 in an overlapping manner, and the upper abutting portion 44 is Fixed rail 17
It is arranged above the upper rolling surface 20 of. Also the fourth
As shown in the figure and FIG. 6, a front stopper 45 and a rear stopper 46, which are bent into a substantially S-shape, are bolted to the upper surface side of both ends of the upper rolling surface 20 of the fixed rail 17. Stoppa 45,4
Buffer rubbers 47 and 48 are attached to the mutually opposing surfaces of the stopper pieces 43, respectively, with which both end edges of the contact portion 44 of the stopper piece 43 abut in a movable manner. When the heat insulating door 34 is in the closed state, one end edge of the abutting part 44 abuts against the buffer rubber 47 of the front stopper 45, and when the heat insulating door 34 is in the fully open state, the other end edge of the abutting part 44 abuts against the rear stopper 45. 46 of the buffer rubber 48. Further, as shown in FIGS. 8 and 9, on the upper end surface of each stopper 45, 46, a cover body 49 is suitably bent to cover the front of the fixed rail 17 and the movable rail 27. , 51. The cover body 49 has approximately the same length as the fixed rail 17. A pull portion 52 for opening and closing the door 34 is provided on the front side of the heat insulating door 34.

The embodiment of the present invention is constructed as described above, and when the heat-insulating door 34 is in the closed state, the movable door roller 32 on one side of the movable rail 27 is supported in contact with the upper surface of the lower rolling surface 21 of the fixed rail 17, The lower surface of the upper rolling surface 29 on the other side of the moving rail 27 is supported in contact with the fixed door roller 24, and the heat insulating door 34 is suspended from the fixed rail 17 side. When opening the heat insulating door 34, use the pull part 52 to open the heat insulating door 34 in the first position.
All you have to do is slide it in the direction of arrow P in the figure. On this occasion,
The upper rolling surface 29 of the moving rail 27 has both fixed door rollers 2
3 and 24, the guide wall 31 is inserted and guided within the grooves 25 and 26 of each fixed door roller 23 and 24. On the other hand, the movable door roller 32 rolls on the upper surface of the lower rolling surface 21 of the fixed rail 17, and
The groove 33 of the movable door roller 32 is guided by rolling along the guide wall 22 of the fixed rail 17. From the middle of the opening operation, the movable door roller 32 begins to roll on the lower surface of the upper rolling surface 20 of the fixed rail 17. Even in this case, the concave groove 33 of the movable door roller 32 is connected to the fixed rail 17.
is guided by rolling along the guide wall 22 of. As shown by the imaginary line in FIG. 1, when the heat insulating door 34 is fully opened, the stopper piece 43 comes into contact with the buffer rubber 48 of the rear stopper 46, and the front half of the heat insulating door 34 in the opening direction P and The front half of the movable rail 27 in the opening direction P is projected from the refrigerator main body 10, and the lower surface of the upper rolling surface 29 of the rear half of the movable rail 27 in the opening direction P is supported in contact with both fixed door rollers 23 and 24, and the movable door roller 32 is supported in contact with the upper rolling surface 20 of the fixed rail 17, and the heat-insulating door 34 is supported here in a cantilevered manner.
For the next closing operation, if the heat-insulating door 34 is slid in the direction of the arrow Q in FIG. The state is obtained. When the heat insulating door 34 is opened and closed, the guide rail 40 at the lower end of the heat insulating door 34 is relatively moved along the rollers 42 . As described above, since the heat insulating door 34 is supported in a cantilevered manner protruding from one side of the refrigerator main body 10 when fully open, the fixing rail 17 having a length slightly longer than the width of the heat insulating door 34 Since the heat-insulating door 34 can be fully opened and can be configured to be shorter than the conventional guide rail 3, it can be transported with the fixed rail 17 attached to the decorative upper frame 13 in advance during assembly and production, and can be transported to the construction site. Easy and quick installation. In addition, since the fixed rail 17 is relatively short compared to the width of the heat-insulating door 34, it is possible to form the opening 12 close to the frontage of the refrigerator main body 10, and therefore it is possible to form a large opening 12 with a lift stand etc. Items can be taken in and out at once. Furthermore, each groove 2 of each door car 23, 24, 32
The guide walls 22, 31 of each rail 17, 27 are inserted into each of the guide walls 22, 31.
Since the door rollers 23, 24, and 32 are configured to roll relative to each other along the heat insulating door 34, it is possible to effectively prevent back and forth shaking when the heat insulating door 34 is opened and closed.
Also, each car 23, 24, 32 is connected to each rail 17, 2.
Since it is configured to roll between the upper and lower rolling surfaces 20, 21, 29, and 30 of the heat insulating door 34, it is possible to prevent shaking around the horizontal axis when the heat insulating door 34 is opened and closed. is highly effective. Further, even when the heat insulating door 34 is fully open, the free end side of the heat insulating door 34 can be prevented from descending. Furthermore, fixed rail 17
and the moving rail 27 are combined in a conjugate manner, so that the rigidity is high, and therefore each rail 17, 2
7 can be made thinner. In addition, each car 23,
The thicker side of 24, 32 is the rolling surface 20, 21, 29
Since it is configured to roll in contact with the roller, it is highly stable during rolling.

In the above embodiments, the heat shield door 34 is shown to be manually opened on one side, but it may be opened on both sides, or even automatically opened using a motor.

(Effects of the invention) According to the invention, since the heat insulation door is supported in a cantilevered manner when the heat insulation door is open, the fixed rail can be configured to be relatively short compared to the width of the heat insulation door. Since it can be transported in a pre-assembled state, on-site installation can be done easily and quickly. In addition, since the fixed rail can be configured to be relatively short compared to the width of the heat-insulating door, it is possible to form an opening close to the frontage of the refrigerator, making it possible to take in and out large items at once using a lift platform, etc. can do. Furthermore, a guide wall of each rail is inserted into each groove of each door roller, and each door roller relatively rolls along each guide wall, and each rail is formed with a substantially U-shaped cross section. Therefore, shaking of the heat-insulating door can be effectively prevented. Furthermore, since the rails are combined in an interlocking manner, it has the advantage of high rigidity.

[Brief explanation of the drawing]

Fig. 1 is a front explanatory view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line shown in Fig.
Figure - Line cross-sectional view, Figures 4 to 6 are 1
7 is an enlarged view of the main parts of the figure, FIG. 7 is a sectional view taken along the line in FIG.
The figure is Fig. 6 - line cross-sectional view, and Fig. 10 is the 1st
11 is a front explanatory view showing a conventional example, and FIG. 12 is a sectional view taken along the line XII-XII in FIG. 11. 10...refrigerator body, 12...opening, 17...
...Fixed rail, 20...Upper rolling surface, 21...Lower rolling surface, 22...Guide wall, 23...Fixed door roller, 2
4... Fixed door roller, 25... Concave groove, 26... Concave groove,
27...Moving rail, 29...Upper rolling surface, 30...
... lower rolling surface, 31 ... guide wall, 32 ... movable door roller, 33 ... concave groove, 34 ... heat-insulating door.

Claims (1)

[Scope of utility model registration request] A refrigerator in which a heat-insulating door that can open and close an opening of the refrigerator is movably suspended along a guide rail extending laterally from the upper end of the opening,
The guide rail has a substantially U-shaped cross section and consists of a fixed rail and a movable rail that are interlocked with each other and are movable relative to each other in the longitudinal direction, the fixed rail being fixed to the refrigerator body side, and the movable rail having a heat insulating door. A movable door roller is attached to the front end of the movable rail in the heat-insulating door closing direction, and is positioned between the upper and lower rolling surfaces of the fixed rail in order to roll in contact with either the upper or lower rolling surface of the fixed rail. A fixed rail that is pivotally supported and located on the rear end side of the movable rail in the direction of closing the heat-insulating door, and a fixed door wheel that abuts and supports the lower surface of the upper rolling surface of the movable rail are mounted on the front end of the fixed rail in the direction of opening the heat-insulating door. Due to the relative movement between the fixed rail and the movable rail, the guide wall, in which the circumferential annular groove formed in the movable door roller is rollingly guided, is formed on the upper surface of the lower rolling surface of the fixed rail along its longitudinal direction. A guide wall that protrudes and is inserted into a circumferential annular groove formed in each fixed door roller so as to be relatively movable is provided on the lower surface of the upper rolling surface of the movable rail along its longitudinal direction. Heat-insulated door opening/closing device for refrigerators.