JPH0338625Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to an improvement of a gasket that is attached to the door bodies of refrigerators, freezers, low-temperature show cases, etc.

(b) Prior art For example, as shown in Japanese Utility Model Publication No. 12148/1983, a plurality of insulation spaces formed in a gasket attached to the door of a refrigerator are cooled by the cold air inside the refrigerator. As a result, the air inside the space contracts, which deforms a portion of the wall defining the space, impairing the airtightness of the gasket when the door is closed. For this reason, it has been proposed to form a hole in the mounting base to solve this problem, as in, for example, Japanese Utility Model Publication No. 47-11980.

(c) Problems to be solved by the invention However, although it is good to have an improved gasket that can achieve the initial purpose simply by drilling a hole in the mounting part, It is extremely difficult to form a pressure regulating hole in a partition wall that partitions a space whose surroundings are completely sealed, such as the gasket shown in FIG.

Therefore, the present invention provides a gasket that allows pressure regulating holes to be formed extremely easily in walls that partition completely sealed spaces, thereby equalizing the pressure in each space and improving airtightness when the door is closed. do.

(d) Means for solving the problem The present invention includes a mounting base that is attached to the inner periphery of the door body and forms a first space between it and the inner periphery, and a bag-shaped part that contacts the main body. a stretchable flexible inner and outer buffer portion connecting the mounting base and the bag-like portion and defining a second space therebetween; extending from near the inner edge of the mounting base to the inner wall of the bag-like portion; A connecting piece is formed between the mounting base, the bag-shaped part and the inner buffer part, defining a third space into which the inner buffer part enters, and a part of the mounting base that overlaps the inner buffer part and the buffer part, The above-mentioned problem is solved by constructing a gasket having pressure regulating holes that communicate with each of the first to third spaces.

(E) Effect In the above gasket configuration, the second and third
The inner buffer part that partitions the second space enters the third space, and if you take advantage of the fact that this inner buffer part overlaps a part of the mounting base, you can easily reach the inner buffer part from the mounting base with a drill etc. Pressure holes can be drilled.

(f) Embodiment An embodiment of the present invention will be described below based on the drawings. 1 shown in FIG. 1 is a refrigerator main body, which has an outer box 2 made of metal such as stainless steel, and a freezer compartment 3 made of the same stainless steel. The freezer compartment 3 is composed of an inner box 4 and a foamed heat insulating material 5 filled in the space between the boxes 2 and 4, and an opening 6 for taking food in and out is formed in the front of the freezer compartment 3. There is. Reference numeral 7 denotes a metal reinforcing plate provided along the back surface of the outer box 2, and a heating element such as an electric heater is installed at a portion facing the end surface 8 of the outer box 2 to prevent dew condensation on the end surface 2A. A body 9A is provided. Reference numeral 9 denotes an annular connecting member made of plastic, which includes a pair of overhanging pieces 12 overlapping the peripheral edges 10 and 11 of the boxes 2 and 4, respectively.
13, a convex portion 14 embedded in the foam heat insulating material 5 and formed between both the overhang pieces, and both the overhang pieces 1.
A pair of engaging pieces 1 formed at the tips of 2 and 13, respectively.
5, 16, and the two projecting pieces 12, 13 and the peripheral edges 10, 11 are fixed with fasteners 17, such as screws.
By tightening them together at 18, both boxes 2,
4 and connects both boxes in an insulating manner.
Reference numeral 19 denotes a decorative plate made of plastic that covers the connecting member 9, and claws 20 and 21 that engage with the engaging pieces 15 and 16 are formed at both ends of the plate. 16 to cover the connecting member 9 and define the opening 6.

22 is a door body that covers the opening 6 so as to be openable and closable;
It is rotatably attached to the refrigerator main body 1 via a pair of upper and lower hinges 23 (the lower one is not shown) and a mounting plate 24 of the hinges. This door body 22 includes an outer plate 25 made of stainless steel, an inner plate 26 made of ABS resin, a hard snap holder 27 also made of ABS resin and arranged annularly between the two plates 25 and 26, and the two plates 25 and 26. , 26, and a foamed heat insulating material 28 filled in the space between them. The snap holder 27 defines a groove 30 for receiving the inward flange 29 of the outer plate 25 as shown in FIG. An opening 32 extends from one end of the base onto the flange 29 that forms the inner peripheral edge of the door body 22 and faces outward.
and a holding part 34 defining a dovetail groove 33 whose opening serves as a frontage, and a screw etc. The two plates 25 and 26 are fastened together by a stopper 36, and act as a sealing member to prevent foam from leaking from the joint between the two plates 25 and 26.

37 is an annular gasket of the present invention made of a flexible material such as rubber or plastic, and as shown in FIGS. A relatively thick mounting base 4 comprising a bent portion 39 bent from the outer edge of the floating portion in the direction of the inward flange 29.
0 and the floating portion 38 from the inner surface of the bent portion 39
A snap 42 having a glans-shaped or arrowhead-shaped head 41 extends downward and is inserted into the snap holder 27, and a snap 42 extends upward apart from the mounting base 40 and forms a second space 43 therebetween. It consists of extendable buffer sections 44, 45, and a bag-shaped section 47 above the buffer sections into which a flexible magnet piece 46 is inserted, if necessary. Further, at the inner circumferential edge of the gasket 37 , the inner wall of the bag-shaped portion 47 and a part of the floating portion 38 are connected by a connecting piece 48 to form a third space 49, while one side of the connecting piece 48 First and second flexible fin pieces 50 and 51 are integrally formed, each having a different length and deforming as shown by the chain line in FIG. 2 when the gasket 37 hits the inner plate 26. The floating portion 38 of the mounting base 40 has a wall thickness that gradually becomes thinner from the outer edge to the inner edge, and the inner end where the tip touches the inner plate 26 is a sloped piece 52. The bent portion 39 of the mounting base 40 has a sharp tip at its lower end and extends in the opposite direction to the snap 42 .
When inserted, an elastic pressing piece 53 is formed which elastically presses against the inward flange 29 forming the inner periphery of the door body 22 and deforms as shown by the chain line in FIG. The snap 42 is sloped so that the distance between the snap 42 and the floating portion 38 gradually narrows from the base 54 toward the head 41, and the head 41 has a dovetail groove on the snap holder 27. Holding part 3 in 33
4, there are formed flexible fin pieces 55, 56 which can be pressed and deformed as shown by chain lines in FIG. In addition, the outer buffer part 44, which is exposed to the outside air, of both the buffer parts 44 and 45 is designed to prevent it from coming into contact with the mounting plate 24 when the door is closed, and to prevent dust from accumulating on its curved surface. , its lower end is connected to the bent part 39 to make the degree of outward protrusion smaller than that of the other buffer part 45, and to make the curvature of the curved surface uniform. The other buffer section 45 is curved and protrudes toward the third space 49, and is connected to the floating section 38 that forms part of the mounting base 40.
This floating part 38 is located at two places in the buffer part 45 that overlap with the
At the same time, pressure adjustment holes 57, 58, and 59 are formed by a drill or the like to adjust the air pressure in the second and third spaces 43, 49 and a first space 60, which will be described later.

The gasket 37 has an elastic pressing piece 5 on the inner plate 26.
3 is pressed, insert the head 41 of the snap 42 into the dovetail groove 33 through the opening 32 of the snap holder 27.
It is attached to the inner periphery of the door body 22 by snapping it into the door body 22. Due to this installation, a pressure regulating hole 5 is provided between the outward flange 35 and the floating part 38.
7, 58 to the second and third spaces 43,
In addition to forming a first space 60 communicating with 49,
Spaces 61 and 62 are also formed between the first and second fin pieces 50 and 51 and between the second fin piece 51 and the inclined piece 52, respectively.

According to the above configuration, the pressure regulating holes 57, 58, 59
Each of the first to third spaces 60, 43, 49
As the air pressure in each space 6 becomes uniform and the gasket 37 is cooled due to the temperature drop inside the chamber,
Partial deformation of the gasket 37 caused by air pressure imbalances of 0, 43, and 49 is prevented, thereby maintaining airtightness when the door is closed.

(g) Effects of the invention As described above, the present invention has a mounting base that overlaps with the inner buffer part that partitions the second space and the third space, so that the first to third spaces can be connected to the mounting base and the inner buffer part. It is possible to simultaneously form the pressure regulating holes that communicate the spaces of 3 very easily.

In addition, the pressure regulating holes of the present invention can equalize the air pressure in each space during cooling operation when the door is closed, which prevents partial deformation of the gasket caused by air pressure imbalance and maintains airtightness. Of course, this also has the advantage of further improving the buffering effect of the buffer section of the gasket when the door is closed.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the gasket of the present invention attached to the door of a refrigerator, etc., FIG. 2 is a cross-sectional view of the gasket of the present invention, and FIG. 3 is a cross-sectional view of the snap holder. 37 ...Gasket, 40...Mounting base, 43
...Second space, 44...Outer buffer section, 45...
Inner buffer part, 47... bag-shaped part, 48... connection piece,
49... Third space, 57, 58, 59... Pressure adjustment hole, 60... First space.

Claims (1)

[Scope of utility model registration request] A mounting base that is attached to the inner periphery of the door body and forms a first space between the inner periphery and the inner periphery, a bag-like part that contacts the main body, and a bag-like part that connects the mounting base and the bag-like part, a stretchable flexible inner and outer buffer portion that defines a second space; a connecting piece defining a third space into which the inner buffer part enters, and a connecting piece formed in the inner buffer part and a portion of the mounting base overlapping with the buffer part, and defining each of the first to third spaces. A gasket characterized by having a pressure regulating hole communicating with the gasket.