JP3872161B2 - Refrigerator door - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gasket for forming a sealed structure for a refrigerator door together with a refrigerator body.
[0002]
[Prior art]
Conventionally, soft vinyl chloride has been frequently used as a door gasket that bears a part of the sealed structure of a refrigerator.
[0003]
Vinyl chloride can be manufactured from a relatively small and inexpensive equipment for chemical polymerization called suspension polymerization, and it has excellent moldability, is flame retardant because it contains chlorine, and is widely used because of its low material price. It is a general purpose resin. However, hydrogen chloride is generated during incineration, and the hydrogen chloride is regulated by the Air Pollution Control Law, and equipment such as an incinerator is also damaged by hydrogen chloride. For this reason, the use of vinyl chloride has recently been regarded as a problem.
[0004]
The PVC Industry Association is also aware of the above problems, and its use is changed from short-term packaging materials and home appliances, automobile parts to long-term waterworks, civil engineering and construction materials such as sewage pipes and base sheets. Trying to convert.
[0005]
In that sense, the use of vinyl chloride door sashes has also been reduced in refrigerators, and the amount used has been reduced by reducing the weight by changing the gasket structure. However, molding a gasket with a dechlorinated resin or elastomer that is not vinyl chloride and putting it to practical use has been difficult to apply to a refrigerator having a life of 10 years or more, although it is a short-term product.
[0006]
A conventional refrigerator door is disclosed in Japanese Patent Laid-Open No. 7-253269.
[0007]
Hereinafter, the conventional refrigerator door will be described with reference to the drawings.
FIG. 7 is a perspective view of a current refrigerator. In FIG. 7, reference numeral 1 denotes a refrigerator main body, which is provided with a rotary refrigeration room door 2, a drawer-type freezer compartment door 3, and a drawer-type vegetable compartment door 4 at its front opening.
[0008]
Since the basic structure of these doors is the same except for the dimensions, the refrigerator compartment door 2 will be described in detail with reference to the cross-sectional view of the main part of FIG.
[0009]
The refrigerator compartment door 2 is inserted into the metal surface plate 6 with the left and right sides 5 bent, the gasket mounting sash 7 formed by extrusion inserted into the left and right sides 5 of the metal surface plate 6, and the upper and lower sides of the metal surface plate 6. It is framed by a handle 8 and a cap 9 of an injection molded product made of synthetic resin.
[0010]
A foam heat insulating material 13 is injected between the frame, the reinforcing plate 11 fixed to the flange 10 of the extruded gasket mounting sash 7, and the door back plate 12. Further, a gasket 15 is fitted into a gasket mounting groove 14 constituted by a gasket mounting sash 7 made of extrusion molding and a handle 8 and a cap 9 of an injection molded product.
[0011]
The gasket 15 is generally extruded by soft vinyl chloride, and the insertion portion 16 inserted into the gasket mounting groove 14 is thick. A rubber magnet 17 is usually formed by mixing and extruding chlorinated polyolefin rubber and ferrite magnetic powder. 18 is a storage bag portion for storing the rubber magnet 17, 19 is a hollow bag portion, 20 is a fin portion, and has a structure having an air chamber for heat insulation. The soft vinyl chloride in these parts is thin.
[0012]
Further, the outer box 21 made of iron plate of the refrigerator 1 to which the gasket 15 is in close contact forms an inward flange portion 22 by bending, and is fastened with a sponge 24 so as to be in close contact with the inner box 23 formed of ABS or PS. Yes. Further, the foam heat insulating material 13 is injected between the outer box 21 and the inner box 23 in the same manner as the door 2.
[0013]
The rubber magnet 17 of the gasket 15 is attracted to the flange portion 22 when the refrigerator door is closed, thereby forming a sealed structure together with the refrigerator main body and preventing leakage of cold air from the refrigerator.
[0014]
[Problems to be solved by the invention]
However, the gasket 15 having the above-mentioned conventional structure is made of vinyl chloride and generates hydrogen chloride when incinerated after being disposed of. The hydrogen chloride contaminates the atmosphere, and equipment such as an incinerator is also hydrogen chloride. There was a problem of being hurt by. Although it is possible to remove only the gasket 15 before incineration, since the refrigerator has recently become larger and more doors, there is a problem that it is difficult to remove it easily in a short time.
[0015]
Moreover, the amount of heat | fever penetration | invasion increased through the gasket 15 with the increase in the number of doors, and there existed a subject of increasing the amount of electric energy used and promoting global warming.
[0016]
Further, there is a problem that a gap is generated between the rubber magnet 17 and the storage bag portion 18 and a sound is generated when opening and closing, and a task for inserting the rubber magnet 18 is difficult.
[0017]
Also, during long-term use, due to the difference in the impact force on the flange when opening and closing, the deformation of the inner part of the gasket 15 becomes large and the sealing property is impaired, or the rubber magnet 17 is deformed due to the weight, and the vertical sealing property is There was also a problem that it was damaged.
[0018]
In particular, in the rotary door 2, there is a problem that the gasket 15 on the side close to the rotation center is remarkably deformed and the hermeticity in three directions is impaired, and as a result, the amount of electric energy used is extremely increased.
[0019]
The present invention solves the conventional problems, eliminates waste of electric energy by eliminating the problem at the time of disposal, reducing the amount of heat intrusion, and reducing deformation during long-term use. The purpose is to contribute to improvement.
[0020]
[Means for Solving the Problems]
In order to achieve this object, the refrigerator door gasket according to the present invention includes a heat insulating box filled with a heat insulating material between an inner box and an outer box, a flange provided at an opening thereof, and the heat insulating box sealed. And a gasket provided on a peripheral edge of the door, and a magnet band stored in a storage bag portion formed on the gasket, and the magnet band is in close contact with the flange portion to form a sealed space. One or more hard segments selected from styrene, olefin, urethane, ester, amide, crystalline polyethylene, syndiotactic 1,2-butadiene rubber, and trans-1,4 isoprene rubber It is made of a thermoplastic elastomer with a soft segment mainly composed of a rubber component in the hard segment. From a mixture of a tan-based foaming agent, an EPDM-based foaming agent, a silicon-based foaming agent and a magnetic material containing one or more magnetic powders selected from alnico magnets, samarium / cobalt magnets, neodymium / iron / boron magnets An elastomer foamed magnet band, which is obtained by arranging a hard elastomer foam on the inner side and a soft elastomer foam on the outer side .
[0021]
According to the present invention, since a non-chlorine-based thermoplastic elastomer is used, hydrogen chloride is not generated even when it is discarded and incinerated, and equipment for an incinerator or the like is also not damaged by hydrogen chloride. Is obtained.
[0023]
In addition , the use of highly magnetic powder enables the magnet strip to be thinned, resulting in a thinner gasket, resulting in a refrigerator door that does not increase the amount of heat entering through the gasket even when the number of doors is increased. It is done.
[0025]
In addition , since the magnet band is made of elastomer foam, there is no gap in the storage bag, there is no sound when opening and closing, and there is a highly assembled refrigerator door that can be processed by integral molding or injection foaming and insertion work can be omitted. can get.
[0027]
In addition , since the softness of the magnet band is made of elastomer foams that differ between the inside and outside of the warehouse, even if there is a difference in the impact force on the flange during opening and closing, the deformation of the inner part of the gasket 15 is small and sealed. The use of a light weight foam elastomer does not cause deformation due to weight, and a highly airtight refrigerator door can be obtained.
[0028]
And the heat insulation box which filled the heat insulating material between the inner box and the outer box, the flange part provided in the opening part, the door which has a mechanism which opens and closes in the rotary operation which seals the heat insulation box, and its periphery And a magnet band stored in a storage bag portion formed on the gasket. The magnet band is in close contact with the flange portion to form a sealed space. The gasket is made of styrene or olefin. One, two or more hard segments selected from styrene, urethane, ester, amide, crystalline polyethylene, syndiotactic 1,2-butadiene rubber, trans-1,4 isoprene rubber, the hard segment It is made of a thermoplastic elastomer with a soft segment mainly composed of a rubber component. , EPDM foaming agent, silicone foaming agent and elastomer foaming consisting of a mixture of one or more magnetic powders selected from alnico magnets, samarium / cobalt magnets, neodymium / iron / boron magnets A magnet band which is made of a hard elastomer foam by arranging a hard elastomer foamed magnet band and a soft elastomer foamed magnet band in a two-layer structure on the front and back surfaces, and on the side close to the center of rotation. A thick magnet band made of a soft elastomer foam on the far side .
[0029]
According to the present invention, since the hard elastomer is made into two layers, even if the hard elastomer deforms during long-term use, the soft elastomer compensates for the deformation, so that the sealing performance is not impaired, and as a result, the amount of electric energy used A refrigerator door that does not increase excessively is obtained.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention includes a heat insulating box filled with a heat insulating material between an inner box and an outer box, a flange portion provided at the opening thereof, a door for sealing the heat insulating box, and It consists of a gasket provided on the peripheral edge and a magnet band stored in a storage bag part formed on the gasket. The magnet band is in close contact with the flange part to form a sealed space, and the gasket is made of styrene, It has one or two or more hard segments selected from olefin, urethane, ester, amide, crystalline polyethylene, syndiotactic 1,2-butadiene rubber, trans-1,4 isoprene rubber, and the hard Ri Do from thermoplastic elastomers blended with soft segment mainly composed of a rubber component into segments, the magnet band is urethane foaming agent, EPDM Elastomer foamed magnet strip made of a mixture of a foaming agent, a silicon-based foaming agent and an magnetic material containing one or more magnetic powders selected from alnico magnets, samarium / cobalt magnets, neodymium / iron / boron magnets The magnet band formed into an elastomer foam has a hard elastomer foam on the inside of the warehouse and a soft elastomer foam on the outside of the warehouse , and when incinerated after being discarded, Hydrogen chloride can be prevented from being generated, and it also has the effect of preventing damage to facilities such as incinerators by hydrogen chloride.
In addition, since the magnetic band can be made thin by using high magnetic powder, the thickness of the gasket can be reduced. As a result, even if the number of doors is increased, the amount of heat entering through the gasket is not increased.
In addition, there is no gap in the storage bag and no sound is produced when opening and closing. In addition, since processing by integral molding or injection foaming can be performed, the operation can be omitted and the assemblability can be improved.
In addition, even if there is a difference in the impact force on the flange during opening and closing during long-term use, the deformation of the inner part of the gasket is small and the sealing performance is not impaired, and since a lightweight foam elastomer is used, it depends on the weight There is an effect | action which does not produce a deformation | transformation and does not impair sealing property.
[0031]
In the invention according to claim 2, the magnetic substance contained in the magnet band contains one or more magnetic powders selected from alnico magnets, samarium / cobalt magnets, neodymium / iron / boron magnets, Since a high magnetic magnetic powder is used, the magnet band can be thinned, and as a result, the gasket can be thinned. Therefore, even if the number of doors is increased, the amount of heat entering through the gasket is not increased.
[0032]
According to a third aspect of the present invention, the magnet band is made of a mixture of a urethane foaming agent, an EPDM foaming agent, a silicon foaming agent, and the magnetic material according to the third aspect, and is formed into an elastomer foam. There is no gap in the part, and there is no sound when opening and closing. In addition, since processing by integral molding or injection foaming can be performed, the operation can be omitted and the assemblability can be improved.
[0033]
The invention according to claim 4 is a magnet band formed into an elastomer foam, in which a hard elastomer foam is disposed on the inner side and a soft elastomer foam is disposed on the outer side. Even if there is a difference in impact force, the deformation of the inner part of the gasket is small and the sealing performance is not impaired. Also, since a lightweight foam elastomer is used, deformation due to weight does not occur and the sealing performance is not impaired. Has an effect.
[0034]
The invention according to claim 2 is a door having a mechanism that opens and closes in a rotary operation, wherein a hard elastomer foamed magnet band and a soft elastomer foamed magnet band are arranged in a two-layer structure on the front and back surfaces, The magnet band made of hard elastomer foam is thick on the side near the center of rotation, and the magnet band made of soft elastomer foam is thick on the far side, and even if the hard elastomer deforms during long-term use, the soft elastomer Since the deformation is compensated, the sealing property is not impaired, and as a result, the amount of electric energy used is not extremely increased.
[0035]
Hereinafter, an embodiment of the present invention will be described with reference to FIG. In addition, about the same structure as the past, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
[0036]
(Embodiment 1)
FIG. 1 is a cross-sectional view of a main part of a refrigerator door 25 according to Embodiment 1 of the present invention. In FIG. 1, the elastomer gasket 26 is a polymer containing no chlorine such as styrene, olefin, urethane, ester, amide, crystalline polyethylene, syndiotactic 1,2-butadiene rubber, trans-1,4 isoprene rubber, and the like. 1 or two or more hard segments selected from the above, and the hard segment is composed of a thermoplastic elastomer containing a soft segment mainly composed of a rubber component. Reference numeral 27 denotes a damping unit.
[0037]
The operation | movement is demonstrated about the door 25 for refrigerators comprised as mentioned above. Thermoplastic elastomers are less distorted under small stress conditions even if they are softer than vinyl chloride, and the follow-up performance is reduced during opening and closing. However, the damping part 27 is easily distorted even with a small stress, and has an effect of improving the followability. Further, since the thermoplastic elastomer does not contain chlorine, it can be realized that hydrogen chloride is not generated even if it is discarded and incinerated, and equipment such as an incinerator is not damaged by hydrogen chloride. Moreover, since these thermoplastic elastomers can be repeatedly molded, defective moldings can be reused.
[0038]
(Embodiment 2)
FIG. 2 is a cross-sectional view of a main part of the refrigerator door 28 according to the second embodiment of the present invention. In FIG. 2, 29 is a high-adsorption gasket and 30 is a magnet strip. The magnet band 30 is formed by mixing one or two or more highly magnetic magnetic powders selected from highly magnetic alnico magnets, samarium / cobalt magnets, neodymium / iron / boron magnets, and a binder.
[0039]
The operation | movement is demonstrated about the door 28 for refrigerators comprised as mentioned above. The magnet strip 30 using the magnetic powder of high magnetic material can be made thin when obtaining the same magnetic force, and as a result, the high-adsorption gasket 29 can be made thin. Therefore, it is possible to prevent the amount of heat entering through the gasket 29 from increasing even when the number of doors is increased.
[0040]
(Embodiment 3)
FIG. 3 is a cross-sectional view of a main part of a refrigerator door 31 according to the third embodiment of the present invention. In FIG. 3, 32 is a foam gasket, and the foam magnet band 33 is composed of one or more elastomers selected from urethane-based foaming agents, EPDM-based foaming agents, chloroprene-based foaming agents, and silicon-based foaming agents, and alnico magnets. It is an elastomer foam made of a mixture of one or two or more highly magnetic magnetic powders selected from samarium / cobalt magnets, neodymium / iron / boron magnets.
[0041]
The operation | movement is demonstrated about the door 31 for refrigerators comprised as mentioned above. The foamed magnet band 33 foams a mixture of a foamable thermoelastomer and magnetic powder and fills the storage bag portion without any gaps. Therefore, noise is eliminated when opening and closing, and processing such as integral molding in extrusion molding and injection foaming with a long nozzle can be performed, so that the work for insertion can be omitted, and the assemblability is improved.
[0042]
(Embodiment 4)
FIG. 4 is a cross-sectional view of a main part of the refrigerator door 34 according to the fourth embodiment of the present invention. In FIG. 4, in the parallel gasket 35, a hard magnet band 36 made of a hard elastomer foam is arranged on the inner side, and a soft magnet band 37 made of a soft elastomer foam is arranged on the outer side.
[0043]
The operation | movement is demonstrated about the door 34 for refrigerators comprised as mentioned above. Since the magnet bands are made of different elastomer foams on the inner side and the outer side, the deformation of the high magnet band 36 on the inner side of the gasket 35 even if there is a difference in the impact force to the flange during opening and closing during long-term use. Is small, and the soft magnet band 37 is attracted at the time of small deformation, so that the sealing performance is not impaired. Further, since a lightweight foam elastomer is used, deformation due to weight does not occur over a long period of time, and it is possible to realize that the sealing performance is not impaired.
[0044]
(Embodiment 5)
5 and 6 are cross-sectional views of the main part of the refrigerator door 38 according to the fifth embodiment of the present invention. In the figure, 39 is a rotating shaft, 40 is a two-phase gasket, 41 is a soft foamed elastomer containing magnetic powder, 42 is a hard foamed elastomer containing magnetic powder, and the amount of extrusion at the time of simultaneous extrusion is changed. To change the thickness.
[0045]
The operation | movement is demonstrated about the door 38 for refrigerators comprised as mentioned above. When the door is closed, it contacts the flange portion 19 from the side close to the rotation shaft 39. Therefore, the gasket is subjected to a greater stress each time it is opened and closed than the side farther from the rotating shaft 39 than the far side. Therefore, deformation due to stress remains on the side close to the rotation axis during long-term use, and as a result, a gap is formed between the door and the outside air invading, increasing the operating rate of the refrigerator. However, in the two-phase gasket 40, since the hard and soft elastomer is made into two layers, even if the hard foamed elastomer 42 is deformed during long-term use, the soft foamed elastomer 41 compensates for the deformation. As a result, it can be realized that the amount of electric energy used does not increase extremely.
[0046]
【The invention's effect】
As described above, the invention according to claim 1 is the door that seals the heat insulation box body, the heat insulation box body filled with the heat insulating material between the inner box and the outer box, the flange portion provided at the opening thereof. And a gasket provided at the peripheral portion thereof, and a magnet band stored in a storage bag portion formed on the gasket, and the magnet band is in close contact with the flange portion to form a sealed space. One, two or more hard segments selected from olefin, olefin, urethane, ester, amide, crystalline polyethylene, syndiotactic 1,2-butadiene rubber, trans-1,4 isoprene rubber, It consists of a thermoplastic elastomer with a soft segment composed mainly of a rubber component in the hard segment, and the magnet band is a urethane-based foaming agent Elastomer foaming consisting of a mixture of EPDM foaming agent, silicon foaming agent and magnetic material containing one or more magnetic powder selected from alnico magnet, samarium / cobalt magnet, neodymium / iron / boron magnet The magnet band, which is made of an elastomer foam, has a hard elastomer foam on the inside of the warehouse and a soft elastomer foam on the outside of the warehouse. Hydrogen chloride can be eliminated, and equipment such as incinerators can be prevented from being damaged by hydrogen chloride.
[0047]
In addition, since the magnetic substance contained in the magnet band contains one or more magnetic powders selected from alnico magnets, samarium / cobalt magnets, neodymium / iron / boron magnets, the magnet band can be made thin, and consequently Since the gasket can be thinned, there is an effect that the amount of heat entering through the gasket does not increase even when the number of doors is increased.
[0048]
In addition, the magnet band is made of a mixture of a urethane foaming agent, EPDM foaming agent, silicon foaming agent and the magnetic material according to claim 3 and formed into an elastomer foam so that there is no gap in the storage bag portion. Sometimes there is no sound, and since it can be processed by integral molding or injection foaming, the work can be omitted and the assemblability can be improved. In the invention according to claim 4, the magnet band formed into an elastomer foam according to claim 3 has a hard elastomer foam on the inner side and a soft elastomer foam on the outer side. Even if there is a difference in the impact force on the flange during opening and closing, the deformation of the high magnet band inside the gasket is small, and the soft magnet band is adsorbed when the deformation is small, so that the sealing performance is not impaired. In addition, since a lightweight foam elastomer is used, deformation due to weight does not occur over a long period of time, and the sealing performance is not impaired.
In addition, since the softness of the magnet band is made of elastomer foams that differ between the inside and outside of the warehouse, even if there is a difference in the impact force on the flange during opening and closing, the deformation of the inner part of the gasket 15 is small and sealed. The use of a light weight foam elastomer does not cause deformation due to weight, and a highly airtight refrigerator door can be obtained.
[0049]
According to a second aspect of the present invention, in a door having a mechanism for opening and closing in a rotary operation, a magnet band made of hard elastomer foam and a magnet band made of soft elastomer foam are arranged in a two-layer structure on the front and back surfaces. Even if the elastomer on one side is deformed during long-term use by thickening the magnet band made of hard elastomer foam on the side close to the center of rotation and thickening the magnet band made of soft elastomer foam on the far side Since one elastomer compensates for the deformation, the sealing property is not impaired, and as a result, the amount of electric energy used can be prevented from being extremely increased.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a refrigerator door according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of a main part of a refrigerator door according to a second embodiment of the present invention. FIG. 4 is a cross-sectional view of the main part of the refrigerator door of the fourth embodiment of the present invention. FIG. 5 is a cross-sectional view of the main part of the refrigerator door of the fifth embodiment of the present invention. FIG. 6 is a horizontal sectional view of a refrigerator door according to a fifth embodiment of the present invention. FIG. 7 is a sectional view of essential parts of the refrigerator door according to the seventh embodiment of the present invention. Sectional view [Explanation of symbols]
2 Refrigerating room door 26 Elastomer gasket 29 High adsorption gasket 30 Magnet band 32 Foam gasket 33 Foam magnet band 35 Parallel gasket 36 Hard magnet band 37 Soft magnet band 40 Two-phase gasket 41 Soft foam elastomer 42 Hard foam elastomer

Claims (2)

A heat insulating box filled with a heat insulating material between an inner box and an outer box, a flange provided at the opening thereof, a door for sealing the heat insulating box, a gasket provided at a peripheral portion thereof, and a gasket. A magnetic band stored in the storage bag portion, and the magnet band is in close contact with the flange portion to form a sealed space. The gasket is made of styrene, olefin, urethane, ester, amide, It has one or more hard segments selected from crystalline polyethylene, syndiotactic 1,2-butadiene rubber, and trans-1,4 isoprene rubber, and a soft segment mainly composed of a rubber component is blended in the hard segment the Ri Do from thermoplastic elastomer, the magnet band is urethane foaming agent, EPDM foaming agent, silicon-based foaming agent and Al An elastomer foamed magnet strip made of a mixture with one or two or more magnetic powders selected from a co-magnet, a samarium / cobalt magnet, a neodymium / iron / boron magnet, and the elastomer foam A refrigerator door characterized in that the magnetized band has a hard elastomer foam on the inner side and a soft elastomer foam on the outer side .   A heat insulating box filled with a heat insulating material between the inner box and the outer box, a flange provided at the opening thereof, a door having a mechanism for opening and closing in a rotary operation for sealing the heat insulating box, and a peripheral portion thereof It comprises a gasket provided and a magnet band stored in a storage bag part formed on the gasket, and the magnet band is in close contact with the flange part to form a sealed space. The gasket is made of styrene, olefin, It has one or two or more hard segments selected from urethane, ester, amide, crystalline polyethylene, syndiotactic 1,2-butadiene rubber, and trans-1,4 isoprene rubber, and the hard segment has rubber. It consists of a thermoplastic elastomer containing a soft segment mainly composed of ingredients, and the magnet band is a urethane foaming agent, EP Elastomer foaming consisting of a mixture of M-type foaming agent, silicon-type foaming agent and magnetic material containing one or more magnetic powders selected from Alnico magnet, samarium / cobalt magnet, neodymium / iron / boron magnet A magnet band that is made of a hard elastomer foam and a magnet band made of soft elastomer foam and a magnet band made of soft elastomer foam are arranged in a two-layer structure on the front and back surfaces. A door for a refrigerator characterized by thickening a thick magnet band made of a soft elastomer foam on the far side.

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