JP2004301473A - Door device of refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the failure in sealing caused by the deformation of packing. <P>SOLUTION: The packing is mounted on a peripheral edge of a rear face of a door 20B, and a magnet 37 is inserted in a magnet insertion cylinder 36 with respect to the packing 30B mounted on upper and lower horizontal sides and a vertical side at a free end side among four sides. On the other hand, a tube made out of a soft synthetic resin having the rigidity lower than the magnet 37A and having high elasticity, is inserted into the magnet insertion cylinder 36 of the packing 30B mounted on a vertical side on a rotating shaft 26 side of the door 20. The packing 30B on the side of the rotating shaft 26 side may be largely deformed in closing the door in comparison with the packing on the other sides, but the tube 38 of low rigidity and high elasticity inserted inside the packing 30B can absorb the large amount of deformation, whereby the distortion and deformation can be prevented, and the failure in sealing can be prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a door device for a storage.
[0002]
[Prior art]
A hot / cold serving car used in hospitals, etc., has a pair of warming room and cold room inside the main body, which are arranged side by side with a heat insulating partition wall, and doors are installed at each doorway in a double door manner. The hot and cold meals are kept warm and the cold food is kept cool, with the trays containing the hot and cold foods separated and placed in both rooms through the partition wall while opening both doors. It can be stored (for example, see Patent Document 1).
By the way, the door used for this kind of catering car has a heat insulating structure in order to enhance the heat insulating function in both rooms, etc., and as shown in FIG. The packing 3 in which the packing 2 is buried is mounted, and the packing 3 is air-tightly closed by being attracted to and adhered to the main body 4 (periphery of the entrance) by magnetic force.
[0003]
[Patent Document 1]
JP-A-11-281239
[Problems to be solved by the invention]
By the way, when the above-mentioned door 1 is turned around the turning shaft 5 from the opened state and is closed, as shown in FIG. 7, the door 1 is disposed on the side edge of the turning shaft 5 side. The packing 3 first comes into contact with the main body 4 (the edge of the entrance), and adheres while deforming. In other words, when the packing 3 on the side of the rotating shaft 5 abuts on the main body 4, the angle α formed with the front surface of the main body 1 is larger than when the packing 3 on the opposite side edge abuts. Is large before reaching the contact position. For this reason, the magnet 2 may be twisted inside the packing 3 on the side of the rotating shaft 5, and the packing 3 may be deformed into a distortion, resulting in poor sealing or the like.
[0005]
In particular, there are a plurality of pairs of a warm room and a cold room, and one set of doors can be opened by overlapping with the surface side of an adjacent door of another set (one embodiment of the present invention). In the configuration shown in FIG. 1), it is necessary that the rotating shaft 5 is disposed further away from the main body 4, so that the rotating radius of the packing 3 on the rotating shaft 5 side around the rotating shaft 5 is obtained. As a result, the packing 3 on the rotating shaft 5 side hits the main body 4 from an earlier point in time of the door closing operation, and must move on the main body 4 while receiving frictional resistance for a longer distance until reaching the proper position. Therefore, there is a situation that the packing 3 is more easily deformed.
The present invention has been completed based on the above circumstances, and an object of the present invention is to prevent poor sealing due to deformation of a packing.
[0006]
[Means for Solving the Problems]
As means for achieving the above object, the door device of the storage according to the invention of claim 1 is configured such that one side edge of the door is rotatably supported on one side edge of the entrance of the storage body, A packing is mounted on the periphery of the back surface of the door, and the packing is brought into contact with the periphery of the entrance to close the door, except for a side portion of the packing on the rotation axis side of the door. A magnet is attached to the inside of the side portion, and an elastic body having lower rigidity than the magnet is attached to the inside of the side portion on the rotation axis side of the door. Have.
[0007]
According to a second aspect of the present invention, in the first aspect, doors are rotatably supported on adjacent side doors at adjacent side edges, and the surfaces of both doors are flush with each other. Each of the back surfaces is in contact with the periphery of the corresponding entrance and closes, and the rotation axis of each door is provided substantially on the same surface as the surface of the door, so that one of the doors is It is characterized in that it can be opened in an upside down posture so as to overlap with the surface of the other door whose surface is closed.
[0008]
Function and effect of the present invention
<Invention of claim 1>
Of the packing, the packing on the side where the magnet is mounted inside is closely adhered to the periphery of the doorway by magnetic force, and the packing on the side of the rotating shaft of the door where the elastic body is mounted inside is the other side. Due to the magnetic attraction of the packing of the portion, the elastic body is elastically deformed and is brought into close contact with the periphery of the remaining entrance, so that the periphery of the entrance is hermetically sealed over the entire periphery.
The packing on the side of the door on the rotating shaft side is more likely to have a large amount of deformation when the door is closed than the other sides, but the inside of the packing on the side on the rotating shaft side is larger than the magnet. Since the elastic body having low rigidity is mounted, the amount of deformation can be more greatly absorbed. In other words, distortion and deformation can be prevented, and poor sealing can be prevented.
[0009]
<Invention of Claim 2>
In the type in which the door is overlapped and opened on the surface side of the adjacent door, the pivot axis of the door needs to be arranged further away from the main body, so the packing on the side part on the pivot axis side is There is a possibility that the amount of deformation may be further increased due to an increase in the turning radius or the like. However, the amount of deformation is similarly absorbed by installing an elastic body having low rigidity inside, so that the hermetic seal can be reliably sealed. .
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment in which the present invention is applied to a hot / cold serving car will be described with reference to FIGS.
As shown in FIG. 1, the hot / cold serving car includes a serving car main body 10 formed of a rectangular heat-insulating box having both front and back surfaces opened, and a caster 11 is provided on the bottom surface. , And can be pulled or pushed forward and backward, and a machine room 13 is provided on the upper surface.
[0011]
The inside of the main body 10 is partitioned into two front and rear rooms by a heat insulating wall (not shown), and each room is further partitioned into two by a heat insulating partition wall 15. The central two rooms are refrigeration rooms 17, and the adjacent preservation rooms 16 and refrigeration rooms 17 form a pair, each of which is provided with a double door 20 which will be described later.
Then, the tray T on which the hot food and the cold food are separated and placed is placed on the shelf 18 while penetrating the partition wall 15 and is housed in the paired warming room 16 and the cold room 17 to be paired. Are kept warm and cold foods are kept refrigerated.
[0012]
Next, the door device will be described.
The front and rear openings 10A of the main body 10 are provided with four doors 20 each, and the two outer doors 20A are for the warming room 16 and are respectively located on the left and right of the opening 10A of the main body 10. It is supported so as to be openable and closable about both side edges. On the other hand, the two central doors 20B are for the refrigerator compartment 17 and are opened and closed about the center heat insulating wall side as the center of rotation. When the doors 20A and 20B are described in common, they are referred to as a door 20.
As shown in FIG. 2, the door 20 has a heat insulating structure in which two window plates 22 made of a transparent resin plate or a glass plate are fitted in a rectangular frame body 21 at intervals. The vertical frame on the free end side (right side in FIG. 2) opposite to the rotation center side is the handle frame 21A. A mounting groove 24 for mounting a packing 30 to be described later is formed in a rectangular shape on the back surface on the outer edge side of the frame body 21.
[0013]
Each door 20 is supported as follows. The two doors 20B on the refrigerating room 17 side are supported with the center heat insulating wall side as the center of rotation as described above in a posture in which the handle frame 21A is disposed outside. Therefore, as shown in FIG. 3, hinge plates 25 project from the upper and lower ends of the widthwise central portion of the opening 10 </ b> A of the main body 10, and hinge pins 26 projecting from the upper and lower hinge plates 25 serve as doors. 20B is fitted into bearing holes 28 of brackets 27 attached to the upper and lower surfaces of the end portion on the rotating shaft side of 20B.
[0014]
Both doors 20B can be closed in a state parallel to the opening 10A, with their respective surfaces flush. Further, as shown in FIG. 3, the axes of the upper and lower hinge pins 26 are set to be on the same plane as the surface of the closed door 20B (the surface of the frame 21). Thus, for example, when the right door 20B in FIG. 3 is rotated clockwise in FIG. 3 around the hinge pin 26, the surface of the right door 20B overlaps with the surface of the left door 20B. It can be opened once.
[0015]
Note that the door 20A on the side of the storage compartment 16 is rotatably supported by hinge pins 26 disposed at upper and lower ends of left and right side edges of the opening 10A of the main body 10, and detailed description thereof is omitted. The axis of the hinge pin 26 is set so as to be positioned on a vertical line where the extension surface of the surface of the closed door 20A (the surface of the frame 21) and the extension surfaces of the front and rear side surfaces of the main body 10 intersect. As a result, the door 20A can be opened by 270 degrees so that the surface of the door 20A overlaps the side surface of the main body 10 as shown in FIG.
[0016]
The packing 30 is attached to the back surface of the door 20 as described above, and each door 20 is closed by bringing the packing 30 into contact with the opening edges of the entrances 16A and 17A of the warming room 16 or the cold room 17. It has become. In addition, the opening edge of the entrance 16A is formed by the left or right side edge, the upper and lower edges, and the partition wall 15 of the warming room 16, while the refrigerating room 17 is formed by the heat insulating wall, the upper and lower edges of the main body 10. An entrance 17A is formed by the partition wall 15 and the outer shell of the main body 10 and the heat insulating wall is formed of a magnetic material such as a stainless steel plate, and a magnetic plate 15A is stretched on the end face of the partition wall 15. Thereby, the opening edges of both entrances 16A and 17A are formed of a magnetic material over the entire circumference.
[0017]
The packing 30 is formed by extruding a rubber material. Two packings are prepared vertically and horizontally, and the ends cut at 45 degrees are connected to each other so that the packing 30 is arranged in a square shape as a whole. ing.
The cross-sectional shape of the packing 30 is as shown in FIG. 4, and a hollow substantially arrowhead-shaped mounting portion 32 that can be inserted into the mounting groove 24 of the door 20 is formed on the back surface of the substrate 31. A rectangular magnet insertion tube 36 is formed at a position near the outer side edge of the surface via an air chamber 34.
[0018]
Here, of the four packings 30, the upper and lower two horizontal packings 30A and the packing 30A (the right side in FIG. 4) mounted along the vertical frame on the free end side of the door 20 are inserted with magnets. A magnet 37 having a rectangular cross section is inserted almost tightly into the cylinder 36.
On the other hand, inside the magnet insertion tube 36 of the packing 30B mounted along the vertical frame on the rotation axis side of the door 20, a cylinder made of, for example, a soft synthetic resin having a lower rigidity and a higher elasticity than the magnet 37 is provided. A shaped tube 38 is inserted. The tube 38 is inserted into the magnet insertion tube 36 while being elastically deformed into a substantially elliptical shape. In a natural state, the surface (contact surface) of the magnet insertion tube 36 on the side where the tube 38 is mounted is fitted with the magnet 37. It protrudes more toward the front side than the contact surface of the magnet insertion tube 36 on the other side.
[0019]
The operation of the present embodiment is as follows.
As described above, on the back surface of each door 20, four vertical and horizontal packings 30 are mounted in a rectangular shape while inserting the mounting portion 32 into the mounting groove 24. Here, the tube 38 is inserted into the magnet insertion tube 36 of the packing 30B on the rotating shaft side of the door 20, and the magnet 37 is inserted only into the magnet insertion tube 36 of the remaining three packings 30A.
Taking the door 20B on the refrigerator compartment 17 side as an example, when the door 20B is closed from the open state, among the packings 30, first, as shown in FIG. The magnet insertion cylinders 36 of the upper and lower packings 30A sequentially come into contact with the corresponding opening edges of the entrance 17A from the center of rotation with respect to the upper and lower opening edges of the entrance 17A. Finally, as shown in FIG. The magnet insertion tube 36 of the end packing 30A hits the corresponding opening edge, and the upper and lower edges and the free end packing 30A are brought into close contact with the periphery of the entrance 17A by the magnetic force of the magnet 37, and accordingly, the packing on the rotating shaft side. 30B is elastically deformed and is brought into close contact with the remaining opening edge, so that the peripheral edge of the entrance 17A is sealed over the entire circumference.
[0020]
Here, when the packing 30B on the rotating shaft side of the door 20 abuts on the main body 10 (the opening edge of the entrance 17A), the angle α formed with the front surface of the main body 10 is large as shown in FIG. On the free end side, the angle β is small as shown in FIG. 6), and the amount of deformation is large before reaching the regular contact position. In particular, since the door 20B adopts a structure in which the door 20B is overturned and opened on the surface side of the adjacent door 20B, the hinge pin 26 (rotation axis) needs to be disposed further away from the main body 10, Then, since the turning radius of the packing 30B on the turning shaft side around the turning axis becomes large, the packing 30B on the turning shaft hits the main body 10 from an earlier point in time of the closing operation and reaches the proper position. Since it is necessary to move over the opening edge of the entrance 17A while receiving the frictional resistance over a longer distance, there is a situation that it is more susceptible to deformation.
[0021]
In this regard, in this embodiment, since the tube 38 having a lower rigidity than the magnet 37 is inserted into the inside of the packing 30B on the rotating shaft side, it is possible to absorb a larger amount of deformation with elastic deformation. In other words, the deformation of the packing 30B, particularly the magnet insertion tube 36, is prevented, so that poor sealing can be prevented.
In the packing 30B on the rotating shaft side, only the tube 38 is inserted in the magnet insertion tube 36 instead of the magnet 37, and the packing 30 itself has a cross-sectional shape common to all four sides. As a result, there is no possibility of incurring high costs such as providing a dedicated mold.
The same operation and effect can be obtained for the door 20A on the side of the storage room 16.
[0022]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and furthermore, besides the following, within the scope not departing from the gist. Can be implemented with various modifications.
(1) The elastic body to be mounted inside the packing on the pivot shaft side of the door is not limited to the soft tube exemplified in the above embodiment, but it is essential that the elastic body has a lower rigidity and a higher elasticity than the magnet. Just fine.
(2) Further, the present invention is not limited to a serving car, and can be widely applied to door devices in other storages such as refrigerated showcases.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a hot / cold serving car according to an embodiment of the present invention. FIG. 2 is a partially cutaway cross-sectional view in a state where a door is fully closed. FIG. FIG. 4 is a partially enlarged cross-sectional view showing a mounting portion of the packing on the door. FIG. 5 is a plan view showing a state in which the door is being closed. FIG. 6 is a state just before the door is fully closed. FIG. 7 is a plan view showing a state in the middle of closing a door according to a conventional example.
10: Serving car main body (storage main body) 16: Storage room 16A: Doorway (of storage room 16) 17: Refrigeration room 17A: Doorway (of storage room 17) 20, 20A, 20B ... Door 26: Hinge pin (rotation) Shaft) 30, 30A, 30B ... packing 36 ... magnet insertion tube 37 ... magnet 38 ... tube (elastic body)

Claims (2)

At one side edge of the doorway of the storage body, one side edge of the door is rotatably supported, and packing is attached to the periphery of the back surface of the door, and the packing abuts on the periphery of the doorway. In what was made to close,
A magnet is mounted inside the other side of the packing except for the side of the door on the rotation axis side, while the inside of the side on the side of the rotation axis of the door is less than the magnet. A storage door device, wherein an elastic body having a low rigidity is mounted. Doors are rotatably supported at the side edges adjacent to the side-by-side doors, and the back surfaces of both doors are closed by abutting the corresponding peripheral edges of the doors with the surfaces of the doors flush with each other. In addition, the pivot axis of each door is provided substantially on the same plane as the surface of this door, so that one door overlaps the surface of the other door that closes its surface. 2. The storage door device according to claim 1, wherein the storage device can be opened in an inverted position.

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