JP3199390B2 - Double door system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double door system in which the opening of a heat insulating box is opened and closed by a double door and a gasket for sealing is provided on the back of the door.

[0002]

2. Description of the Related Art Conventionally, a door device of this type is, for example, NR-F40VP1 released by Matsushita Refrigeration Machinery Co., Ltd. in March 1990.
There was one that was used in a refrigerator-type refrigerator.

FIGS. 14 to 19 show details thereof. In the figure, 1 is a refrigerator-freezer body, 2 is an outer box made of iron plate, 3 is an inner box formed of synthetic resin, 4 is a foam insulation material filled between the outer box 2 and the inner box 3, 5 Denotes an insulating box body opened forward, and 5A denotes an opening of the insulating box body 5.

[0004] Reference numerals 6A and 6B denote two upper and lower double doors, which are rotatably supported by upper and lower hinges 7A and 7B provided above and below the left and right edges of the heat insulating box 5, respectively. .

[0005] Reference numeral 8 denotes a gasket as a seal member in which a magnet is inserted into the periphery of the rear surfaces of the doors 6A and 6B, 9 denotes the inside of the refrigerator compartment, and 10 denotes a gasket 8 located on the non-pivot side of the rear surface of the door 6A. Support arms 11, which protrude in nine directions in the refrigerator compartment at the upper and lower portions of the inner portion, are partition members.

[0006] Reference numeral 12 denotes a guide portion which is formed above and below the edge of the opening 5A of the heat insulating box 5 at a portion located on the non-pivot side of each of the doors 6A and 6B. The pins protrude from the guide portion 12 so as to face each other from above and below the portion 5A. 13A is a screw for attaching the guide 12 to the opening 5A. Reference numeral 14 denotes a seal material which is attached to the guide portion 12 and is in close contact with the partition body 11.

The upper and lower ends 15A of the partition 11 have a length slightly smaller than the vertical dimension of the opening 5A, extend vertically, have a flat front surface, and a curved rear corner. Slidably conforms to the pin 12A of the guide portion 12
An arcuate groove is provided with a terminal end portion 15B of the arcuate groove 15A to the other by one with the opening 15C.

Reference numeral 16 denotes a spring having an end mounted on the side surface 6 "of the partition body 11 and the inner plate 6 'of the doors 6A and 6B, and having a toggle portion 17 in the middle. The spring 16 enters the partition body 11. A hole (not shown) is provided.

The operation of the refrigerator having the above-described structure will be described below. As the door 6A is closed, the partition 11 enters the refrigerator compartment 9 and the pin 12A contacts the arc- shaped groove 15A of the partition 11, and furthermore, the arc- shaped groove slidably matches. Move along 15A.

As a result, the partition 11 rotates counterclockwise, and when the door 6A is closed, the door 6A,
The gasket 8 on the non-pivot side of 6B is in close contact with the front surface of the partition 11 and the seal material 14 is in close contact with the upper and lower ends of the partition 11 to hermetically seal the inside 9 of the refrigerator compartment. The refrigerator 16 is quickly moved to the original position by the spring 16.

Next, when the door 6A is opened, the door 6A is pulled toward the user, so that the pin 12A moves the partition body 11 having the arc- shaped groove 15A which slidably coincides with the door. Body 1
1 is rotated clockwise, whereby the gas gut 8 is separated from the front surface of the partition body 11, and thereafter the door 6A is easily rotated and opened. At this time, a force in the opposite direction is applied to the partition body 11 by the toggle portion 17 of the spring 16 so that the partition body 11 moves promptly.

As described above, according to the conventional example, since the seal members are also attached to the upper and lower end portions of the guide portion, the airtightness in the refrigerator compartment can be maintained.

[0013]

However, in the above-mentioned conventional construction, when the upper and lower pins are shifted left and right or back and forth due to mounting variations because the pins of the guide portion are located up and down, the partition body is forced to operate. There was no case.

Further, the support arm of the partition body is made of an iron plate, and when the door is opened, dew adheres and rust is generated. When an abnormal force is applied to the partition body, the partition body is deformed to hinder rotation. There was a problem of coming.

Further, in the present refrigerator, the double door system in which the partition rotates is employed only in the refrigerator compartment. When the structure is employed in the refrigerator compartment, the temperature difference between the inside and outside of the refrigerator causes the gasket surface to be exposed. There was a danger that dust would accumulate or that outside air would enter the refrigerator and cause frost in the refrigerator.

An object of the present invention is to solve the above-mentioned conventional problems, and to provide a double door type door device which can smoothly operate a partition body and can be adopted also in a freezing room.

[0017]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a double door type door device according to the present invention is provided on both sides of the front opening so as to close the front opening of a refrigerator or freezer formed in a heat insulating box. First and second doors of a double-opening type rotatably supported on the first and second doors, gaskets respectively provided on the peripheral edges of the rear surfaces of the first and second doors and in contact with the peripheral edge of the front opening portion, A partition extending on the back surface of the non-pivot portion and extending in the direction of the rotation axis of the first door so as to extend over the peripheral edge of the front opening, and rotatably attached to the partition; An arc-shaped groove provided only on the end face and having one open side, and a pin provided in the heat-insulating box inserted into the groove, the arc-shaped when the first door opens the partition body. Is rotated by the engagement of the groove and the pin to contact the second door. There moved to a position, with said arcuate groove is rotated by the engagement of the pin is moved in the counter-pivot support side and the abutting position of the second door when the first door is closed, A partition wall for partitioning the freezing room or the refrigerator compartment from other rooms, a partition wall front plate and a trim constituting the partition wall, and a pin inserted into an arc-shaped groove of the partition body is integrated with the trim. It is formed.

In addition, if there is a refrigerator formed in the heat insulating box ,
Or the front opening so as to close the front opening of the freezer compartment.
First and second double-door type pivotally supported on both sides
A door and a back edge of the first and second doors.
A gasket contacting the periphery of the front opening;
A length extending over the periphery of the front opening on the back surface of the non-pivot portion of one door
A partition extending in the rotation axis direction of the first door.
And body, and supporting the partition member rotating freely, taken on the first door
A support arm made of resin and an upper end surface of the partition body
And / or an arc-shaped one opening at the lower end face
A groove provided on the heat-insulating box inserted into the groove.
When the first door opens the partition.
To be rotated by the engagement between the arc-shaped groove and the pin.
The door moves to a position where it does not contact the second door, and the first door is closed.
When turning, due to the engagement between the arc-shaped groove and the pin
And move it to a position where it comes into contact with the anti-pivot side of the second door.
It is configured so that:

Further , an inner box is formed inside the heat insulating box.
A freezer compartment partitioned at the top by a partition wall;
Rotate both sides of the front opening so as to close the front opening.
First and second doors which are pivotally supported at the door;
The front opening is provided on the back edge of each of the first and second doors.
A gasket that abuts a peripheral edge of the mouth, and a non-pivot support of the first door.
The first portion has a length on the back surface of the portion extending over the periphery of the front opening.
A partition that extends in the direction of the rotation axis of the door and is rotatably mounted
And one end provided only on the upper end face of the partition
Arc-shaped groove and fixed to the upper inner box of the heat insulating box body
The base guide section is fitted and mounted on the base guide section.
Guide top part and before this guide top part is formed
A pin inserted into an arc-shaped groove of the partition,
When the first door is opened, the arc-shaped groove and the pin
Position that is rotated by the engagement of the
And the arc-shaped groove is closed when the first door is closed.
The second door is pivoted by the engagement of
It is configured to be moved to a position where it contacts the side.
You. In addition, a PTC head is provided inside the guide top by a holding plate.
Are fixed. In addition, the partition wall and the partition front plate
And a PTC heater mounted in a cover mounted at a position facing the lower end face of the partition body of the trim.

[0020]

[Action] With this configuration, since the partition member is rotation <br/>, the arc-shaped groove and the pin vertically both provided by a vertical one only arc-shaped groove and the pin engaging action of provided Engaged
The partition body is prying due to the unevenness of the upper and lower mounting as in the case of
Opening and closing of the first door without such that Ru performed smoothly.
Also, by forming the pin integrally with the trim,
The variation in the mounting position is smaller.

Also, by converting the support arm to resin,
No dew adheres, no rusting, and abnormal force on the partition
Is restored even if it is temporarily deformed due to the elasticity of the resin
You.

Further , a base guide section and a guide are provided above the freezer compartment.
There is a gap between the gasket and the door
No perspiration on the gasket surface or frost
No. Also, the outside air since the attaching the PTC heater inside the guide top portion inside and the cover that faces the partition member upper and lower ends becomes the high humidity can be prevented dew attaches it to the gasket surface, the internal low temperature of the freezing compartment Double door system
Is a can shall.

[0023]

An embodiment of the present invention will be described below with reference to the drawings. Note that the same reference numerals are given to the same components as those in the related art, and detailed description thereof is omitted.

Reference numeral 18 denotes a freezer compartment, and 19 denotes a freezer compartment.
Reference numeral 8 denotes a partition wall for partitioning the refrigerator compartment 9 from the refrigerator compartment 20. Reference numeral 20 denotes a partition wall front plate. Reference numeral 21 denotes a guide top portion formed above the opening edge of the freezer compartment 18, and reference numeral 22 denotes a guide top portion which is attached to the guide top portion 21 before the guide top portion 21 is attached to the refrigerator-freezer main body 1, and closely adheres to the partition body 11. Guide Sea
Lumber.

The guide seal member 22 is attached by opening a seal member hole 23 on the door side of the guide top portion 21, inserting the seal member hole 23 into the seal member hole 23, and engaging with the upper holding plate 24A. ing. At this time, the guide seal material 22 covers the tip of the guide top portion 21.

Reference numeral 25 denotes a reinforcing plate buried in the foam heat insulating material 4, reference numeral 26 denotes a base guide portion held on the reinforcing plate 25 by screws 13B, and reference numeral 27 denotes a PTC provided at the upper and lower portions of the freezer compartment storage 18. It is a heater. The guide top 21 is fixed to the base guide 26 by screws 13C and claws 28A. 29 is a notch for draining water.

Numeral 30 denotes a trim having a substantially U-shaped cross section with a front opening, which is formed integrally with the pin 12A by protruding. 24B is a lower holding plate for holding the PTC heater 27, and 31 is a cover. A boss 32 is formed so as to protrude from the cover 31 and fixes the lower holding plate 24B by welding. The recess 33 formed in the trim 30 is provided with a cover.
The claw 28B formed on the base 31 is configured to be fitted.

34A and 34B separate the partition 11 from the first door 6A.
The upper and lower resin support arms 34B are provided with a two-stage stepped hole 34C having an enlarged lower frontage. The upper and lower resin support arms 34A and 34B have a side surface 6 'and a screw 13G.
It is fixed by. 34D is a lightening hole.

Reference numerals 35A and 35B denote trim French of the partition body 11, 36 denotes an upper cap, 37A and 37B denote lower caps, and 38A denotes a thin U-shaped material having a substantially U-shaped cross section and has notches in left and right flanges. Reference numeral 38B denotes a magnetic partition front plate having a substantially U-shaped cross section and made of a thin material. 39A, 39B
Are trim french 35A, 35B and partition body front plate 38
A, a heat insulating material in 38B.

Reference numerals 40A and 40B denote front panel heaters. 4
Reference numeral 1 denotes a cover seal material which is attached to the lower part of the partition member 11 and closely adheres to the cover 31. This cover seal material 41 is
The flange of the partition body front plate 38A and the lower cap 37A are sandwiched and engaged. At this time, the cover seal material 41 covers the tip of the cover 31.

13D is an upper cap portion 36 and lower cap portions 37A and 37B, and screws for fixing the partition body front plates 38A and 38B. 13E is an upper cap portion 37A and lower cap portions 37A and 37B for trim french 35A and 35B.
It is a screw to fix.

Reference numeral 42 denotes a seal fin extending above and below the center of the opening 5A from the gasket 8. 43A is an upper support made of resin for holding the upper resin support arm 34A, 43B is holding the lower resin support arm 34B, and is a core of the front plate heaters 40A and 40B. This is a resin-made lower support in which a case 43C for accommodating the card is integrated.

Upper support 43A, lower support 43B
The positioning hole 4 is formed in the door inner plate 6 '.
Positioning pins 45 projecting from the upper support 43A and the lower support 43B are inserted into the door 4 from the back surface of the bank 6 'of the door inner plate 6' and temporarily fixed with screws 13F. Since the foam insulating material 4 is filled, the upper support 43A and the lower support 43B are firmly held.

46 is a cover harness, 47 is cushion rubber, and 13H is a screw for fixing the cover harness 46.

The operation of the refrigerator having the above-described structure will be described below. When the freezer compartment door 6A is closed, the partition 11 enters the freezer compartment 18 and the pins 12A
Is in contact with the arc- shaped groove 15A of the partition body 11, and further moves along the semi-circular groove 15A that slidably matches.

As a result, the partition 11 rotates counterclockwise, and when the door 6A is closed, the door 6A,
The gasket 8 on the non-pivot side of 6B is in close contact with the front surface of the partition body 11, and the upper and lower seal fins 42 are wrapped.

Further, the guide seal member 22 and the cover seal member 41 are in close contact with the upper and lower ends of the partition member 11, and the inside 18 of the freezer compartment is provided.
Airtightly. In addition, the PTC heater 27 prevents the movable part from freezing and sweating. The partition 11 is quickly moved to the original position by the spring 16.

Here, the partition body 11 is a partition body front plate 38A.
If only the magnetic material is made of a magnetic material, the gasket 8 supported on the non-pivot side will have good adhesion. Further, after the cord of the front plate heater 40A is passed through the two-stepped hole 34C of the lower resin support arm 34B, the tube is formed through the two-stepped hole 34C having a larger frontage.
By passing a wire through it, it is possible to prevent the cord from being damaged. or,
The width of the partition 11 is set in advance so as to be sufficiently larger than the interval between the gaskets 8 on the non-pivot side.

Next, the time of opening the door 6A, by pulling the door 6A forward, the pin 12A slides an arc <br/> shaped groove 15A provided in the partition member 11, the partition member 11 is clockwise Ru is rotated around. Gasket 8 by Re their leaves the partition member 11 front, then it is readily rotate the door 6A opening. At this time, since a force in the opposite direction is applied to the partition body 11 by the toggle portion 17 of the spring 16, the partition body 11 moves promptly.

When the refrigerator door 6A is closed, the partition 11
Penetrates into the refrigerator compartment 9 and the pin 12A
Abuts the arc- shaped groove 15A, and furthermore, slidably fits.
It moves along the arc- shaped groove 15A. As a result, the partition body 11 rotates counterclockwise, and the door 6A
Is closed, the gasket 8 on the non-pivot side of the doors 6A and 6B is in close contact with the front surface of the partition 11 , and the upper and lower seal fins 42 are wrapped. Note that the partition body 11 is formed by the spring 16.
Is quickly moved to its original position.

Here, the partition body 11 is a partition body front plate 38B.
If only the magnetic material is made of a magnetic material, the gasket 8 supported on the non-pivot side will have good adhesion. Also, after the cord of the front plate heater 40B is passed through the two-stepped hole 34C of the lower resin support arm 34B, the tube is inserted through the two-stepped hole 34C having a larger frontage.
By passing a wire through it, it is possible to prevent the cord from being damaged. The width of the partition 11 is set in advance so as to be sufficiently larger than the distance between the gaskets 8 on the non-pivot side.

Next, the time of opening the door 6A, by pulling the door 6A forward, the pin 12A slides an arc <br/> shaped groove 15A provided in the partition member 11, the partition member 11 is clockwise Ru is rotated around. Gasket 8 by Re their leaves the partition member 11 front, then it is readily rotate the door 6A opening. At this time, until now the opposite direction of the force by the toggle portion 17 of the spring 16 partition member 11 moves quickly because it is granted to the partition member 11.

As described above, according to the present embodiment, the pins are provided only on one of the upper and lower opposing surfaces of the partition, so that the door can be displaced by the upper and lower pins as compared with the case where the pins are on the upper and lower sides. There is no hindrance to opening and closing, and furthermore, by integrating the pins of the refrigerator compartment with the trim, it is possible to reduce the displacement due to the variation in the combination of the pin positions. or,
By removing one pin, one corresponding circle
It can eliminate the arc-shaped grooves, rather than the stagnation of cold air in the groove
Succoth is Ru can.

Since the partition body supporting arm is formed of a resin, when the metal is made of metal, the cord is not scratched or dewed, and the meat is cut off to reduce the elasticity of the resin. It also prevents breakage when an abnormal force is applied and sagging during molding. In addition, a two-step structure can be used, and
By inserting a wire or the like, damage to the cord can be prevented.

Since the base guide portion and the guide top portion are provided at the upper portion of the freezing compartment, no gap is formed between the gasket and sweating on the gasket surface and frost in the refrigerator are not generated. Since the PTC heater is mounted on the guide top and inside the cover, it is possible to prevent dew on the gasket surface even when the outside air becomes high in humidity.

[0046]

As described above, the double door apparatus of the present invention pivotally supports both sides of the front opening so as to close the front opening of the refrigerator compartment or freezer compartment formed in the heat insulating box. First and second doors of the double door type, and the first door
And a gasket provided on the peripheral edge of the rear surface of the second door and abutting against the peripheral edge of the front opening, and rotating the first door on the rear surface of the non-pivot portion of the first door by a length extending over the peripheral edge of the front opening. A partition body extending in the axial direction and rotatably mounted, an arc-shaped groove provided on only one of the upper and lower end surfaces of the partition body and having one open end, and the groove inserted into the groove; A pin provided on the heat insulating box, wherein the partition is rotated by the engagement of the arc-shaped groove and the pin when the first door is opened to a position where the partition does not come into contact with the second door. moved, together with said arcuate groove is rotated by the engagement of the pin is moved in the counter-pivot support side and the abutting position of the second door when the first door is closed, freezing chamber or A partition for partitioning the refrigerating compartment from other compartments, a partition wall front plate constituting the partition, and The trim is provided with a pin which is inserted into the arc-shaped groove of the partition body, so that the partition is formed by the engaging action of the pin and the arc-shaped groove provided only on one of the upper and lower sides. Since the body rotates, the partition body does not squeeze due to the unevenness of the upper and lower mounting as in the case of providing and engaging an arc-shaped groove and a pin on both the upper and lower sides.
The door can be opened and closed smoothly. Further, by forming the pin integrally with the trim, the variation in the mounting position of the pin is further reduced, and the first door can be opened and closed more smoothly.

Also, if a refrigerator room is formed in the heat insulating box ,
Or the front opening so as to close the front opening of the freezer compartment.
First and second double-door type pivotally supported on both sides
A door and a back edge of the first and second doors.
A gasket contacting the periphery of the front opening;
A length extending over the periphery of the front opening on the back surface of the non-pivot portion of one door
A partition extending in the rotation axis direction of the first door.
The partition and the partition are rotatably supported, and are attached to the first door.
A support arm made of resin and an upper end surface of the partition body
And / or an arc-shaped one opening at the lower end face
A groove provided on the heat-insulating box inserted into the groove.
When the first door opens the partition.
To be rotated by the engagement between the arc-shaped groove and the pin.
The door moves to a position where it does not contact the second door, and the first door is closed.
When turning, due to the engagement between the arc-shaped groove and the pin
And move it to a position where it comes into contact with the anti-pivot side of the second door.
Since it is obtained by so that construction, since no a supporting lifting arms attached dew by resinification no rust, even be joined by abnormal force to the partition member temporarily deforms elastically resin Return to the original.

Also, the inner box is formed inside the heat insulating box.
A freezer compartment partitioned at the top by a partition wall;
Rotate both sides of the front opening so as to close the front opening.
First and second doors which are pivotally supported at the door;
The front opening is provided on the back edge of each of the first and second doors.
A gasket that abuts a peripheral edge of the mouth, and a non-pivot support of the first door.
The first portion has a length on the back surface of the portion extending over the periphery of the front opening.
A partition that extends in the direction of the rotation axis of the door and is rotatably mounted
And one end provided only on the upper end face of the partition
Arc-shaped groove and fixed to the upper inner box of the heat insulating box body
The base guide section is fitted and mounted on the base guide section.
Guide top part and before this guide top part is formed
A pin inserted into an arc-shaped groove of the partition,
When the first door is opened, the arc-shaped groove and the pin
Position that is rotated by the engagement of the
And the arc-shaped groove is closed when the first door is closed.
The second door is pivoted by the engagement of
It is configured to be moved to a position where it contacts the side
You. Also, a PTC heater inside the guide top
It is more attached and fixed. Also, place the partition in front of the partition
It is composed of a plate and a trim.
PTC heater is installed in the cover installed at the opposite position
Because those fixed, there is no <br/> occur frost base guide portion and the guide freezer compartment perspiration and the refrigerator of the gap is caused not gasket surface of the gasket at the top by the presence of the top portion. In addition, since the PTC heater is installed inside the guide top and inside the cover facing the upper and lower ends of the partition body , it is possible to prevent the gasket surface from being exposed even when the outside air becomes high humidity, and to keep the inside of the refrigerator at a low temperature. Double door
Ru can be used to provide a device.

[Brief description of the drawings]

FIG. 1 is a front view of a refrigerator using a double door system according to one embodiment of the present invention.

FIG. 2 is a front view of the refrigerator in which the partition body of FIG. 1 is intentionally raised.

FIG. 3 is a perspective view of a main part of the partition body of FIG. 2;

FIG. 4 is an exploded perspective view of the freezer compartment door.

FIG. 5 is an exploded perspective view of the refrigerator compartment door.

FIG. 6 is an exploded perspective view of the upper and lower freezer compartments.

FIG. 7 is a partially exploded perspective view of a lower portion of a freezing compartment.

FIG. 8 is a perspective view of the upper and lower portions of the refrigerator compartment.

FIG. 9 is a sectional view taken along the line AA in FIG. 1;

FIG. 10 is a perspective view of a guide top portion.

FIG. 11 is a perspective view of a cover.

FIG. 12 is a sectional view taken along the line BB in FIG. 3;

FIG. 13 is a sectional view taken along the line CC in FIG. 3;

FIG. 14 is a sectional view of a conventional refrigerator door device in a door closed state.

FIG. 15 is a sectional view of the door shown in FIG. 14 in an open state;

FIG. 16 is an enlarged sectional view of a refrigerator according to a conventional example.

FIG. 17 is a perspective view of a conventional refrigerator.

FIG. 18 is a front view of a conventional heat insulating box.

19 is a sectional view taken along the line DD in FIG.

[Explanation of symbols]

 6A, 6B First and second doors 8 Gasket 11 Partition body 12A Pin 19 Partition wall 20 Partition wall front plate 24A, 24B Holding plate 27 PTC heater 30 Trim 31 Cover

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-122191 (JP, A) JP-A-2-1066685 (JP, A) JP-A 1-123979 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) F25D 23/02 F25D 21/04

Claims (5)

(57) [Claims] 1. A double door type first and second doors rotatably supported on both sides of the front opening so as to close a front opening of a refrigerator compartment or a freezer compartment formed in a heat insulating box. A gasket that is provided on the periphery of the back surface of the first and second doors and abuts on the periphery of the front opening;
A partition that extends in the direction of the rotation axis of the first door and is rotatably attached to the back surface of the non-pivot portion of the door so as to extend over the periphery of the front opening and to be rotatable; An arc-shaped groove provided on only one end face and having one opening, and a pin provided in the heat-insulating box inserted into the groove,
When the first door is opened, the partition body is rotated by engagement of the arc-shaped groove and the pin to move to a position where it does not come into contact with the second door, and the first door is closed. When the pin is rotated by the engagement between the arc-shaped groove and the pin, the second
It is moved in the counter-pivot support side and the abutting position of the door, before
A partition wall that separates the freezer or refrigerator compartment from other compartments,
A partition wall front plate and a trim that constitute a partition wall are provided.
The double door device , wherein the pin is formed integrally with the trim . 2. A double door type first and second doors rotatably supported on both sides of the front opening so as to close a front opening of a refrigerator compartment or a freezer compartment formed in a heat insulating box. A gasket that is provided on the periphery of the back surface of the first and second doors and abuts on the periphery of the front opening;
A partition provided on the back surface of the non-pivot portion of the door and extending in the direction of the rotation axis of the first door so as to extend over the periphery of the front opening, and rotatably supporting the partition; A resin-made support arm attached to the first door, an arc-shaped groove provided on an upper end face and / or a lower end face of the partition body, and an open arc-shaped groove, and the heat-insulating box inserted into the groove. The partition body is rotated by engagement of the arc-shaped groove and the pin when the first door is opened, and moves to a position where the partition body does not come into contact with the second door; A double door system, wherein when the first door is closed, the door is rotated by engagement of the arc-shaped groove and the pin to move to a position where the second door comes into contact with a counter pivot side of the second door. 3. A freezer compartment formed by an inner box inside an insulated box and partitioned by a partition wall at an upper portion, and both sides of the front opening so as to close the front opening of the freezer. Pivotally supported double doors of first and second doors, gaskets respectively provided on the peripheral edges of the rear surfaces of the first and second doors and in contact with the peripheral edge of the front opening, and a non-pivot portion of the first door. A partition body extending on the back surface in the direction of the rotation axis of the first door so as to extend over the periphery of the front opening and rotatably attached to the first door;
An arc-shaped groove provided only on the upper end surface of the partition body and having one opening, a base guide portion fixed to the upper inner box of the heat insulating box, and a guide top fitted and attached to the base guide portion Part, a pin formed in the guide top part and inserted into the arc-shaped groove of the partition body, and a rotation by the engagement of the arc-shaped groove and the pin when the first door opens the partition body. The second door is moved to a position where it does not come into contact with the second door, and is rotated by the engagement of the arc-shaped groove and the pin when the first door is closed. A double door system configured to be moved to a position where it contacts the side. 4. The double door system according to claim 3, wherein a PTC heater fixed by a holding plate is provided inside the guide top. 5. The partition wall comprises a partition wall front plate and a trim, and a PTC heater is mounted and fixed in a cover mounted at a position facing a lower end surface of the partition body of the trim. 4. The double door system according to 4 .