JPH0233115Y2 - - Google Patents

Description

[Detailed Description of the Invention] (A) Field of Industrial Application The present invention relates to an insulating door having a gasket disposed on the periphery of the back surface of the box, such as a refrigerator, which comes into contact with the open end surface of the insulating box.

(b) Conventional technology Publication of Utility Model Application No. 59-32282 (F25D23/02) states,
In a rectangular heat insulating door having a foam heat insulating material disposed at the periphery of the back side and a gasket that comes into contact with the opening end face of the heat insulating box and filled between the door front plate and the metal door back plate, the gasket is In the installation part, synthetic resin frame plates are provided corresponding to each side of the door so as to connect the flange formed by bending the periphery of the door front plate to the periphery of the door back plate, and the frame plate The gasket has a narrow groove at the entrance into which the base of the gasket is inserted and locked, and a channel portion integrally forming a passage connected to the lower part of the groove and having a width sufficiently larger than the groove, An insulated door is disclosed with a coupling having a resilient insertion edge inserted into the passageway of the plate.

(c) Problems to be solved by the invention In the above conventional technology, in order to improve the strength of the insulating door, the door front plate, door back plate, and each frame plate are bonded to foam insulation material. Additionally, when a heat insulating door is attached to a refrigerator, the following problem arises because the door back plate and each frame plate are exposed to cold air and cooled.

That is, due to the cooling effect of the refrigerator, both the door back plate and each frame plate are thermally contracted. The metal door back plate, which has a low heat shrinkage force, has its own mechanical strength, so it will not be deformed by heat shrinkage force, but
The frame plate made of synthetic resin, which has a large thermal shrinkage force, has a weak mechanical strength and therefore contracts in the longitudinal direction. Since this frame board is bonded to the foam insulation material, the shrinkage force applied in the longitudinal direction of the frame board itself is applied as stress to the foam insulation material near the frame board, and as a result, the frame board, the foam insulation material Not only is the door bent outward, but the door surface plate is also deformed, making the insulated door look bad.Furthermore, when the door is closed, a gap is formed between the gasket and the open end of the refrigerator. There was also a situation where cold air leaked.

(d) Means for Solving the Problems In order to solve the problems of the prior art described above, the present invention provides a flexible sheet 16 that covers the surface of each frame board 5 on the foam insulation material 6 side and the passage 11. This is a heat insulating door 2 in which the frame plate 5 and the foamed heat insulating material 6 are not bonded together, and the passage 11 is hollow.

(e) Effect According to the above technical means, the seat 16 is
Each frame board 5 is prevented from entering into the foam insulation material 6.
It has the effect of giving flexibility to contraction in the longitudinal direction of the frame plate 5 and the foamed heat insulating material 6,
It acts to assist the contraction of each frame plate 5 in the longitudinal direction.

(f) Embodiment 1 The refrigerator main body is composed of a heat insulating box with a front opening, and a rectangular heat insulating door 2, which is the object of the present invention, is provided to open and close the front opening. Insulated door 2
A metal front plate 3, a metal back plate 4, a frame plate 5 that connects the flange 3A after bending the periphery of the front plate 3 and the periphery of the back plate 4, these front plates 3, It is composed of a foamable heat insulating material 6 that is foamed in-situ and filled in the space between the back plate 4 and the frame plate 5. Reference numeral 7 denotes a gasket in which a hook-shaped protrusion 9 provided at the base is firmly inserted into and engaged with a narrow entrance groove 8 formed in the middle part of the frame plate 5, and the gasket comes into contact with the end surface of the opening periphery of the main body 1 and attracts it. It houses the permanent magnet 10 and is made of elastic rubber material. 12
is a channel portion that is connected to the lower part of the groove 8 and forms a passage 11 that is sufficiently wider than the groove 8. 1
Reference numeral 3 denotes a connector which is formed of a metal plate and has an L-shape with insertion sides 13A, 13A inserted into the passage 11, and each insertion side 13A, 13A has a protrusion 14, 14 projecting to one side. are doing. The extruded synthetic resin frame plate 5 is cut to a predetermined length corresponding to each side of the door 2, and both ends are cut at 45 degrees.
Frame plates 5, 5 arranged adjacent to each other on the periphery of the door back plate 4
The insertion side 13A of the connector 13 is inserted from the end thereof. This insertion occurs because the protrusion 14 is strongly pressed against one wall surface of the passage 11 (the top surface in FIG. 4), so that the insertion side opposite to the side from which the protrusion 14 protrudes is placed on the opposite side of the passage. Since it is strongly pressed against the wall surface (lower surface in FIG. 4), the connecting tool 13 is firmly held in the path 11 of the channel portion 12 and the 45 of the adjacent frame plates 5, 5
The cut portion is reliably joined and held. Since the frame plate 5 is made of synthetic resin, it has flexibility, and this flexibility is utilized when assembling the frames. After placing each frame plate 5 on the periphery of the door back plate 4, the surface of each frame plate on the foam insulation material 6 side and the passage 11 are covered with a flexible sheet 16 made of paper, plastic, etc. Make the passage hollow. These are then assembled to the rear flange 3A of the door surface plate 3. In this combined state, the space between the frame plate 5, the front plate 3, and the back plate 4 is filled with a heat insulating material 6 by foaming on site.
Furthermore, the channel portion 12 is bonded to the sheet 16 and is covered with the sheet 16 and buried deeply in the heat insulating material, and each frame board 5 is separated from the heat insulating material 6 by the sheet 16. After the gasket 7 is filled with the heat insulating material 6, it is inserted into the groove 8 and held there. Note that the frame plate 5 is integrally provided with a soft fin portion 15, and the seat 1
The fins 15 are brought into close contact with the back plate 4 by the pressure when the heat insulating material 6 is foamed through the heat insulating material 6, thereby preventing the heat insulating material 6 from leaking from this portion. Note that the entire insertion side 13A may have elasticity.

(g) Effects of the invention Since the present invention is constructed as described above, it is possible to make the passage hollow with the sheet and prevent the foamed heat insulating material from entering the passage. The joint can be held using only the connectors, and the frame plate can have flexibility in the longitudinal direction due to contraction.Furthermore, since the sheet prevents adhesion between the frame plate and the foam insulation material, the cooling effect is improved. Since the heat shrinkage force is generated in the length of the frame plate itself, and the size of the frame plate is slightly shortened, deformation such as curvature does not occur, and the gasket can be maintained in a normal state.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention. Fig. 1 is an enlarged cross-sectional view taken along line A-A' in Fig. 2, Fig. 2 is a front perspective view of the refrigerator, Fig. 3 is a rear view of the heat insulating door, and Fig. 4 FIG. 2 is an exploded perspective view of the frame plate and the connector. 1... Heat insulation box, 2... Heat insulation door, 3... Door surface plate, 4... Door back plate, 5... Frame board, 6... Heat insulation material, 7... Gasket, 8... Groove , 11... Passage, 12... Channel portion, 13... Connector, 1
3A...insertion side, 16...sheet.

Claims (1)

[Scope of utility model registration request] A gasket that comes into contact with the opening end surface of the insulating box is disposed on the periphery of the back surface, and the box has a rectangular shape with a foam heat insulating material filled between the door surface plate and the metal door back plate, and the gasket arrangement A frame plate made of synthetic resin is provided in the installation part corresponding to each side of the door so as to connect the flange formed by bending the periphery of the door front plate to the periphery of the door back plate, and the frame plate is A narrow groove at the entrance into which the base of the gasket is inserted and locked, and a channel portion integrally formed with a passage connected to the lower part of the groove and having a width sufficiently larger than the groove, and adjacent frame plates. A heat insulating door comprising: a connector having an insertion side to be inserted into the passage; and a sheet covering the foam insulation material side of the frame plate and the passage.