JPH0643667Y2 - Insulation box door - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a door of a heat-insulating box such as an ice maker and a refrigerator, and is particularly suitable for a small model, easy to assemble, easy to maintain, and easy to operate. The present invention relates to a door that can be provided at low cost.

[Background of the Invention] Conventionally, various structures have been proposed and adopted as a door structure for a heat insulating box, and a typical structure among them has been disclosed in, for example, Japanese Utility Model Publication No. 58-43755. Like the seventh
There is a structure shown in FIG.

That is, the structure shown in FIG. 7 (B) is for a so-called large model, unlike the one for a small model to which the present invention is particularly applied, but 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 in contact with the end surface of the external cabinet 7 having the opening 4a.

Since the gasket 20 is arranged on the inner peripheral surface of the door body 6 in this manner, the gasket 20 is arranged so as to face and abut the end surface of the opening 4a of the outer cabinet 7 of the heat insulating box. The opening area of 4a was naturally small as shown by arrow Y. Therefore, even if the above-mentioned gasket arrangement is adopted in the case of a large model, it does not cause a problem so much, but in the case of a small model, the opening area of the opening becomes smaller and it is inconvenient to take out the article. Come here.

In addition, since the conventional door body has to be assembled by using a large number of mounting screws for its complicated structure, the assembly itself becomes complicated and the parts management becomes complicated, resulting in an increase in manufacturing cost. It was.

[Outline of the Invention] In order to solve the above-mentioned problems promptly, the present invention is composed of a relatively small number of parts, and these parts are integrated with each other in a fitting manner, and a gasket is provided on the outer peripheral portion. The purpose is to provide the provided door body.

In order to achieve this object, the present invention is a door body, one end of which is pivotally supported in an opening of a front frame provided on the front side of a heat insulating box, and the rear side of which is open. A door surface plate having a frame-shaped wall portion, a door heat insulating material surrounded by the frame-shaped wall portion and housed therein, and fitted to the frame-shaped wall portion of the door surface plate from the rear side, From a door back plate that cooperates with the door front plate to store the door heat insulating material in the frame-shaped wall portion, an annular elastic sliding contact portion exposed at an outer peripheral portion of the door front plate, and the elastic sliding contact portion. An annular bent portion having one end extending in a U-shape and fitted into the frame-shaped wall portion; and an annular gasket having a plurality of leg portions formed apart from each other at the other end of the bent portion, Around the door back plate, a plurality of mutually spaced fitting / regulating portions located on the front surface side and a rear surface position facing the fitting / regulating portion are disposed at the rear surface side. Rib portions that are spaced apart from each other and that extend intermittently in the circumferential direction are formed so as to receive the parts, and a plurality of predetermined ones of the fitting / restricting portions correspond to each other at intervals of the predetermined ones. The door back plate is engaged with the door front plate through the heat insulating material by fitting with the fitting portion provided on the door front plate while being separated from each other, and the leg portion of the gasket is By inserting the bent portion into the frame-shaped wall portion through a gap defined by the frame-shaped wall portion, the fitting / restricting portion, and the rib portion through between the rib portions. The gasket is held on the outer peripheral portion of the door body.

The main constituent members of the door body are a door face plate, a door heat insulating material, a door back plate and a gasket. The door back plate is attached to the door front plate by fitting the elastic mounting claws into the mounting holes of the door front plate,
The door insulating material is housed in the door body in cooperation with the door face plate.

On the door back plate, in addition to the elastic mounting claw portion described above, a rim portion,
The protrusion is formed, and the leg part of the gasket is
By fitting into the gap defined by the frame-shaped wall portion of the door back plate and the elastic mounting claw portion, rim portion and protrusion of the door back plate,
It is held on the door front plate and the door back plate.

[Embodiment] Hereinafter, a preferred embodiment of the door of the heat insulating box according to the present invention will be described in detail with reference to the drawings.

1 to 7 (A) are for showing a door structure of a heat insulating box according to the present invention, and the reference numeral 1 in the drawings is a heat insulating box of a small ice machine 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. 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 portion 6a side thereof is disposed so as to be inclined toward the rear 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 90 degrees or less. Forming an acute angle.

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 that is provided and forms a ridge formed on the inner surface of the gasket 20 is engaged 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. As is clear from this figure, the door front plate 17 and the door are shown. When the back plate 19 is fitted, the door back plate 19 is inserted 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 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 22b
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 slidable contact portion 20c of the gasket 20 bulges out in a substantially C-shaped cross section and slidably contacts a horizontal slidable contact portion 25 formed at the end 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.
A pair of vertically extending holding wall portions 4c and 4d are formed on both side portions of the holding wall portions 4c and 4d. A hollow chamber 26 is formed between these holding wall portions 4c to provide heat insulation between the door front plate 17 and the front frame 4. Therefore, the gasket 20
The elastic sliding contact portion 20c achieves heat insulation between the inside of the refrigerator and the outside air side by sliding contact with the holding wall portions 4c and 4d and the horizontal sliding contact portion 25, respectively.

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 configured to be capable of contacting 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. Further, it is quite clear when comparing FIG. 7 (A) according to the present invention with FIG. 7 (B) of the prior art, as shown by arrows X and Y, the opening area of the opening 4a is It can be understood that it will be extremely large.

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 the above-mentioned 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.

[Advantages of the Invention] Since the door of the heat insulation box according to the present invention has the above-described structure and operation, various effects as described below can be obtained.

(1) The structure of the door body is extremely simple, and all the parts are assembled only by fitting without using screw tightening or the like, and the assembly is quick and the production cost is low.

(2) Since the gasket is provided around the outer periphery of the door body, the opening area of the opening of the heat insulating box can be made much larger than that of the conventional configuration, and the shape of the opening can be made to appear large in appearance. You can

(3) Since the door front plate and the door back plate are fitted and fixed by the mounting holes and the elastic mounting claws, disassembly and assembly during maintenance become extremely easy.

[Brief description of drawings]

1 to 7 (A) are for showing the door structure of the heat insulating box according to the present invention, and FIG. 1 is a sectional view taken along the line BB of FIG. 2 is a perspective view showing the external appearance of the door of FIG. 1 opened, FIG. 3 is an exploded perspective view of FIG. 1, and FIG. 4 is an exploded perspective view of the door of FIG. ,
5 is a sectional view of the main part taken along the line AA in FIG. 4, FIG. 6 is a sectional view taken along the line CC of FIG. 3, and FIG. 7 (A) is a sectional view showing the main part of FIG. FIG. 7 (B) is a cross-sectional view showing a main part of a conventional configuration. 1 ... Insulation box, 4 ... Front frame 4a ... Opening, 6 ... Door 17 ... Door front plate, 17d ... Mounting hole (fitting part) 18 ... Door insulation, 19 ... Door back plate 20 …… Gasket, 20a …… Leg portion 20b …… Bending portion, 20c …… Elastic sliding contact portion 21 …… Frame-shaped wall portion 22 …… Elastic mounting claw portion (predetermined fitting / restricting portion) ) 23 …… Rib part, 24 …… Projection part (fitting / regulating part) D …… Gap

Claims (1)

[Scope of utility model registration request] 1. A door body (6) having one end pivotally supported by an opening (4a) of a front frame (4) provided on the front side of a heat insulating box (1) and provided so as to be openable and closable. A door front plate (17) having a frame-shaped wall portion (21) whose rear surface is open, and a door heat insulating material (1) surrounded by the frame-shaped wall portion (21) and housed therein.
8) and the frame-shaped wall portion (2) of the door face plate (17) from the rear surface side.
A door back plate (1) that fits into the door surface plate (17) and accommodates the door heat insulating material (18) in the frame wall (21).
9), an annular elastic sliding contact portion (20c) exposed on the outer peripheral portion of the door front plate (17), and one end of the elastic sliding contact portion (20c) extending in a U shape to form the frame-shaped wall portion ( 21) An annular bent portion (20b) fitted with the annular bent portion (20b) and an annular gasket (20) formed at the other end of the bent portion (20b) and formed with a plurality of legs (20a) spaced apart from each other. , Around the door back plate (19), a plurality of fitting / restricting portions (22, 2) located on the front side and spaced from each other.
4) and a rib portion (23) which is spaced apart from each other and extends intermittently in the circumferential direction so as to receive the leg portion (20a) at a position on the rear surface side facing the fitting / restricting portion (22, 24). And a plurality of predetermined ones (22) of the fitting / regulating portions (22, 24) are separated from each other in correspondence with the intervals of the predetermined ones (22). Fitting part (17
By fitting with d), the door back plate (19) engages with the door front plate (17) with the heat insulating material (18) interposed, and the leg portion (20a) of the gasket (20). ) Is the rib part (2
3) through the space to enter the gap (D) defined by the frame-shaped wall portion (21), the fitting / restricting portions (22, 24), and the rib portion (23), By fitting the bent portion (20b) into the frame-shaped wall portion (21), the gasket (2
0) is held on the outer periphery of the door body (6), which is a heat-insulating box body.