JPH0629657Y2 - Insulation box door - Google Patents

Description

[Detailed description of the device]

[Industrial applications]

The present invention relates to an openable and closable door of a heat insulating box such as an ice maker and a refrigerator, and more particularly to a door that can be held in a closed position without using a special latch mechanism.

[Prior art]

Conventionally, various structures have been proposed and adopted as the door structure of the heat insulating box, and a typical structure among them is, for example, the seventh structure disclosed in Japanese Utility Model Publication No. 58-43755.
There is a structure shown in FIG. That is, the structure shown in FIG. 7 (B) is different from that for the small model to which the present invention is particularly applied, and there is a so-called large model, which is continuous with the door face plate 17 of the door body 6. A gasket 20 having a quadrangular cross section is provided on the inner surface of the door back plate 19 formed as described above, and the gasket 20 is simply in contact with the end surface of the external cabinet 7 having the opening 4a for sealing.

[Problems to be solved by the device]

Therefore, in order to hold the door body 6 in the closed position shown in FIG.
Since the magnet was formed hollow and a magnet (not shown) was arranged in the hollow, and this was used as a latch mechanism, the structure of the gasket 20 was complicated and the manufacturing cost was increased. Further, as disclosed in, for example, Japanese Utility Model Publication No. 29-14759, there is also known one that seals a refrigerator by contacting an elastic member provided on the body side of the refrigerator with the packing of the door body. Since the force of the elastic member acts in the direction of opening the door body, a separate latch mechanism is required to hold the door body in the closed position. Accordingly, it is an object of the present invention to provide a door body for a refrigerator or the like that can be held in a closed position without the need for a latch mechanism.

[Means for Solving the Problems]

In order to achieve this object, the door structure of the heat insulating box according to the present invention is provided with a front frame provided on the front side of the heat insulating box and an opening of the front frame, one end of which is pivotally supported to be openable and closable. And a gasket having an elastic sliding contact portion provided on the door body so as to surround the outer peripheral portion of the door body, and when the door body is rotated from the open position to the closed position. The upper and lower horizontal sliding contact portions of the inner peripheral portion of the opening with which the elastic sliding contact portion slides are parallel to each other, the left and right holding wall portions thereof are parallel to each other, and the upper side of the door body is heat-insulated. The upper one of the horizontal sliding contact portions is located rearward of the lower one so that the horizontal sliding contact portion is arranged to be inclined toward the rear side of the box body.

[Action]

When the door body rotates and moves from the open position to the closed position, the elastic sliding contact portion of the gasket slides on the inner peripheral portion of the front frame, that is, the upper and lower horizontal sliding contact portions and the left and right holding wall portions. At this time, the elastic sliding contact portion is elastically deformed by receiving the compressive force from the inner peripheral portion, and thus the heat insulating box body is preferably sealed by its reaction. Moreover, since the upper and lower horizontal sliding contact portions of the inner peripheral portion are parallel to each other and the left and right holding wall portions thereof are parallel to each other, the upper and lower horizontal sliding contact portions correspond to the corresponding portions of the elastic sliding contact portion of the gasket. The acting direction of the compressive force received by is opposite to the opposite direction, and the acting direction of the compressive force received by each corresponding part of the elastic sliding contact part of the gasket is also opposite due to the left and right holding walls, so that the door can be opened. There is practically no component force. Moreover, since the upper one of the horizontal sliding contact portions is located rearward of the lower one so that the upper side of the door body is arranged to be inclined to the rear side of the heat insulating box body, the door body is In combination with the action of the upper and lower horizontal sliding contact portions of the inner peripheral portion and the left and right holding wall portions being parallel to each other, they are stably held in the closed position without using a latch mechanism.

【Example】

Hereinafter, a preferred embodiment of the door of the heat insulation box according to the present invention will be described in detail with reference to the drawings. 1 to 7 (A) are for showing the door structure of the heat insulation box according to the present invention, and the reference numeral 1 in the drawings is the heat insulation box of the small ice maker having a substantially box shape as a whole. It is the body. In FIG. 2 schematically showing the entire structure of the heat insulating box 1, an opening 3 is formed in the front part of the ice storage part 2 of the heat insulating box 1, and an opening 4a made of a resin molding is formed. The front frame 4 is integrally fixed by a fixing means such as adhesion. A door body 6 is provided on one side of the opening 4a by a hinge shaft 5 shown in FIG. 4 so as to be openable and closable in a one-sided manner, and an external cabinet 7 and a top plate 8 having a heat insulating structure are fixed (not shown). It is firmly fixed by means. An ice-making water tank 9 is fixed to a predetermined position by a mounting screw 10 above the inside of the ice storage unit 2. Next, FIG. 3 is an exploded perspective view schematically showing the whole of the heat insulation box body 1 of the ice making machine, and the door body 6 openably and closably provided in the opening portion 4a of the front frame 4 in the ice storage portion 2 is Since the upper part 6a side is arranged so as to be inclined toward the rear part side 1a of the heat insulating box body 1, the angle θ formed by the standing direction (V) of the door body 6 and the horizontal plane (H) is
Form an acute angle of 90 degrees or less. An ice making unit 12 including a compressor 11 and the like is fixed to a mounting plate 2a of the ice storing section 2 by mounting screws 13 at the upper positions of the ice storing section 2 and the ice making water tank 9. Further, the water supply cover 14 and the power supply cover 15 manufactured by resin molding are fitted into the mounting holes 14a and 15a of the external cabinet 7, respectively, and a back plate 16 is provided on the back of the external cabinet 7. Are fitted together. Next, FIG. 1 and FIG. 4 are a schematic cross-sectional view showing the entire heat insulating box 1 described above and an exploded perspective view of the door 6. In FIG. 1, the ice storage unit 2 includes an outer case 2b provided upright,
It comprises an inner box 2c and a connecting portion 2d for connecting the outer box 2b and the inner box 2c, and further has an ice storage heat insulating material 2e built in between the outer box 2b and the inner box 2c. is doing. Since it is necessary to minimize heat conduction from the inner box 2c, the connecting portion 2d should be made as small as possible and a through hole should be provided as appropriate within a range where the strength reduction of the ice storage portion 2 is allowed. It is suitable. The front frame 4 is fixed to the front side of the heat-insulating box 1 by engaging the projection 4b of the front frame 4 with the notch opening 7a provided on the front side of the external cabinet 7 in a fitting manner. Therefore, since the front side of the external cabinet 7 is inclined toward the rear side of the heat insulating box body 1, the front frame 4 and the door body 6 are also arranged in the same manner as described above. The door body 6 whose one side is rotatably supported in the opening 4a of the front frame 4 so as to be openable and closable is provided on the door front plate 17, the door heat insulating material 18, the door back plate 19, and a ring-shaped outer peripheral portion of the door body 6. The door body 6 is constructed as shown in the exploded perspective view of FIG. In FIG. 4, a handle hole 17a is formed on the outer peripheral portion of the front of the door front plate 17 made of resin, and a rectangular frame-shaped wall portion 21 having an open surface is integrally formed on the rear side thereof. A pair of mounting holes 17d are formed in the upper end 17b and the lower end 17c of the door cover plate 17, respectively. Furthermore, this door front plate 17
In the holding hole 17e formed on one side of the hinge shaft 5
When the hinge shaft 5 is fixed to both ends of the front frame 4, the door body 6 is supported so as to be openable and closable in a single-opening manner. A door heat insulating material 18 is stored in the frame-shaped wall portion 21 of the door front plate 17, and a door back plate 19 is fitted into the frame-shaped wall portion 21 from the back side of the door heat insulating material 18. The elastic mounting claw portions 22 formed on the main frame portion 19a of the door back plate 19 are fitted into the mounting holes 17d, and the main frame portion 19a has a plurality of protrusions 24 facing the plurality of rib portions 23. Are formed. A required gap or space D is formed between each rib portion 23 and the protrusion 24 described above, and the main frame portion 19a, which is the outer peripheral portion of the door back plate 19, is provided with a gasket 20 having an overall frame shape. A leg portion 20a, which is provided and forms a ridge formed on the inner surface of the gasket 20, engages with the gap D in a fitting manner. FIG. 5 is a sectional view taken along the line AA of FIG. 4 with the door body 6 shown in FIG. 4 in a fitted state, and as can be understood from this figure, the door front plate 17 is shown. When the door back plate 19 and the door back plate 19 are fitted to each other, the door back plate 1 is placed in the mounting hole 17d formed in the door front plate 17.
The claw portion 22b formed on the horizontal portion 22a of the elastic mounting claw portion 22 of 9 is fitted, and the door front plate 17 and the door back plate 19 are integrally coupled. That is, the horizontal portion 22a is fitted while being bent inward by the horizontal portion 22a slidingly contacting the frame-shaped wall portion 21 when the door front plate 17 and the door back plate 19 are fitted, and in the fitted state. The claw portion 22
b fits into the mounting hole 17d. Further, the gasket 20 has a substantially U-shaped cross section, and its leg portion 20a is fitted in the gap D between the rib portion 23 and the protrusion 24, and the protrusion 24 is not present. In
The bent portion 20 of the gasket 20 is in contact with the vertical portion 22c of the elastic mounting claw portion 22 and the door front plate 17 and the door back plate 19 are fitted to each other.
The frame-shaped wall portion 21 is fitted in the inside of b. The elastic sliding contact portion 20c of the gasket 20 is bulged in a substantially C-shaped cross section, and is in sliding contact with the horizontal sliding contact portion (inner peripheral portion) 25 formed at the end portion of the front frame 4. When assembling the door body 6 described above, the leg portion 20a of the gasket 20 is fitted and sandwiched between the vertical portion 22c of the elastic mounting claw portion 22 and the protruding portion 24 and the rib portion 23, and then the frame When the door insulating material 18 is housed in the wall portion 21 and the door back plate 19 is strongly pressed against the door front plate 17, the door back plate 19 is fitted into the frame wall portion 21 and the claw portion 22b is inside the mounting hole 17d. To complete the fitting. Therefore, after the door front plate 17 and the door back plate 19 are fitted to each other, the elastic portion of the horizontal portion 22a restores the pawl portion 22b to abut against the inner surface of the mounting hole 17d to be fixed, and the assembly is completed. Further, the leg portion 20a of the gasket 20 includes a rib portion 23 and a vertical portion 22.
c, the protrusion 24 and the frame-shaped wall portion 21 are firmly held without dropping. FIG. 6 is a sectional view taken along the line CC of FIG. 3, in which a pair of holding wall portions 4c and 4d extending vertically are formed on both sides of the front frame 4, and these holding wall portions are formed. The elastic sliding contact portion 20c of the gasket 20 slides in contact with 4c and 4d (inner peripheral portion), and the door front plate 1
A hollow chamber 26 is formed between 7 and these retaining wall portions 4c to provide heat insulation between the door front plate 17 and the front frame 4. Therefore, the elastic slidable contact portion 20c of the gasket 20 is slidably contacted with the respective retaining wall portions 4c and 4d and the horizontal slidable contact portion 25, that is, the inner peripheral portion of the opening 4a of the front frame 4 in the compressed state. By applying elastic force to the circumference, heat is blocked between the inside and outside of the refrigerator. As can be seen from FIG. 1, the upper and lower horizontal sliding contact portions 25 are parallel to each other, and as can be seen from FIG. 6, the left and right holding wall portions 4c and 4d are also parallel to each other, and The elastic force applied to the inner peripheral portion does not have a component of force in the direction to push the door body 6 out because the elastic body is not expanded toward the approach direction, and the door body 6 is a gasket. It is held in its closed position by 20. In the illustrated embodiment, the opposing pair of portions of the inner peripheral portion of the opening 4a are parallel to each other as described above, but the portion outside the range in which the gasket 20 is in sliding contact is in relation to the entrance direction of the door body 6. The downstream side may be slightly open. Further, in order to assist the holding of the door body 6 in the closed position by the gasket 20, the upper one of the horizontal sliding contact portions is located rearward of the lower one, and the upper side of the door body 6 is the heat insulating box body 1. It is arranged to be inclined toward the rear side. Therefore, the load of the door body 6 acts in the direction of holding the door body in the closed position. A stopper body 27, which is substantially U-shaped as a whole, is fixed to the outside of the holding wall portion 4d by a mounting screw 28, and a stopper piece 6b of the door body 6 held by the hinge shaft 5 so as to be openable and closable. Is arranged so as to be able to come into contact with the stopper portion 27a of the stopper body 27, and is configured not to open beyond a predetermined rotation angle. The hinge shaft 5 is formed by winding an elastic metal plate into a cylindrical shape, and is generally called a spring pin. The holding shaft of the front frame 4 has a diameter smaller than its natural diameter. By driving into 4e, it is firmly fixed in the radial direction by its restoring force. Further, by inserting the hinge shaft 5 into the holding hole 17e of the door face plate 17 having a diameter larger than its natural diameter, the door body 6 is cantileveredly held by the hinge shaft 5 so as to be openable and closable. Furthermore, FIG. 7 according to the present invention
Although it is quite clear by comparing (A) with the conventional FIG. 7 (B), it can be understood that the opening area of the opening 4a becomes extremely large as shown by arrows X and Y. It should be noted that the above-mentioned configuration is merely a preferred embodiment, and it is possible to achieve the same operation and effect as described above even if some changes are made to the above-described configuration without departing from the spirit and scope of the present invention. It's ridiculous.

[Effect of device]

As described above, according to the present invention, when the door body is in the closed position, the elastic sliding contact portion of the gasket provided so as to surround the outer peripheral portion of the door body has the inner peripheral portion of the opening portion of the front frame. The inner peripheral portion of the inner peripheral portion is in parallel with each other and the upper and lower horizontal sliding contact portions are parallel to each other, and the left and right portions thereof are parallel to each other. The upper ones of the horizontal sliding contact parts are located behind the lower ones so that the holding wall parts are parallel to each other and the upper side of the door body is arranged to be inclined to the rear side of the heat insulating box. Therefore, in other words, due to the parallel arrangement of the upper and lower horizontal sliding contact portions and the parallel arrangement of the left and right holding wall portions on the inner peripheral portion, it is attempted to move the door body to the open position in the closed position. Force does not act, and due to the slanted arrangement of the door body, the load of the door body acts in the direction of holding the door body in the closed position. , The door body, is granted automatic closing function of retaining said door body without using a special latching mechanism in the closed position, nor to the door opening naturally When closed temporarily. Further, the door structure is simplified, which can contribute to a reduction in manufacturing cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 7 (A) are for showing a door structure of a heat insulating box according to the present invention, and FIG. 1 shows the whole heat insulating box. 2 is a cross-sectional view taken along the line BB of FIG. 2, FIG. 2 is a perspective view showing the external appearance of the door shown in FIG. 1, FIG. 3 is an exploded perspective view of FIG. 1, and FIG. FIG. 5 is an exploded perspective view of the door body and the main part, FIG. 5 is a sectional view of the main part taken along the line AA of FIG.
FIG. 6 is a sectional view taken along line CC of FIG. 3, FIG. 7 (A)
FIG. 7 is a sectional view showing an essential part of FIG. 6, and FIG. 7 (B) is a sectional view showing an essential part of a conventional structure. 1 ... Insulation box body, 4 ... Front frame 4a ... Front frame openings 4c, 4d ... Left and right holding wall portions (inner periphery of front frame opening) 6 ... Door body, 6a ... Upper side of door body 20 ... Gasket, 20c ... Elastic sliding contact 25 ... Upper and lower horizontal sliding contact

Claims (1)

[Scope of utility model registration request] 1. A front frame (4) provided on the front side of a heat insulating box (1).
A door body (6) whose one end is rotatably supported by the opening portion (4a) of the front frame (4) and which is openably and closably provided, and the outer peripheral portion of the door body (6) is surrounded by the same. The elastic sliding contact part (20
and a gasket (20) having c), the elastic sliding contact portion (20c) when the door body (6) is rotated from the open position to the closed position.
The inner peripheral portion of the opening (4a) with which the sliding contact is made is such that the upper and lower horizontal sliding contact portions (25) are parallel to each other and the holding wall portions on the left and right sides thereof.
(4c, 4d) are parallel to each other, the upper side (6a) of the door body (6)
So that the upper part of the horizontal sliding contact part (25) is located rearward of the lower part so that the heat insulating box (1) is arranged to be inclined toward the rear part side. Insulated box door structure