JPH0914815A - Thermal insulating door - Google Patents

Abstract

PURPOSE: To provide a thermal insulating door in which a clearance between a pair of plainer members can be closed with a less number of component parts. CONSTITUTION: A thermal insulating door 3 is comprised of a pair of plainer members 11 arranged to each other with a clearance being left therebetween, a trim member 12 arranged to be engaged with an end part of each of the plainer members so as to close the clearance between the plainer members, and thermal insulating material 13 filled in the clearance between the plainer members. Then, the thermal, insulating door 3 closes an opening 2 of a refrigerator in such a manner that it may be freely opened or closed. In addition, the trim 12 is made of a synthetic resin and is extended at a circumferential edge of one surface of the thermal insulating door 3 and concurrently it is oppositely arranged against the opening 2. In addition, this trim 12 is formed with a recessed part extending in a longitudinal direction. Then, a cover closing the recessed part in such a way that it may be opened or closed is formed by a synthetic resin in integral with the trim 12 through a synthetic resin hinge. Further, to the trim 12 is fixed a packing 15 for sealingly closing the opening 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating door for opening and closing an opening of a storage such as a prefabricated refrigerator / freezer.

[0002]

2. Description of the Related Art Insulating doors of this type are disclosed in, for example, Jikho Sho 61.
-222228 (F25D21 / 04) and the like, and will be described with reference to FIG. FIG. 7 is a sectional view of a main part of a conventional heat insulating door.

In FIG. 7, face plates 02 made of a stainless steel plate or the like are arranged on both sides of a heat insulating door 01, and a gap between the pair of face members 02 is made up of a metal heater box 03 and a synthetic resin trim. It is blocked at 04. Inside the heat insulation door 01, heat insulation material such as polyurethane is used.
5 is foam-filled. A packing 07 is attached to the trim 04. On the other hand, opening 0 of the cooling storage
A storage opening frame 010 is attached to the heat insulating panel 09 arranged around 8. Then, when the heat insulating door 01 closes the opening 08, the packing 07 makes the storage frame 0
Abutment 10 seals the opening 08. Further, the packing 07 is prevented from icing on the storage opening frame 010 due to the heat generated by the dew condensation preventing heater arranged in the heater box 03.

[0004]

By the way, the heater box 03 comprises a groove-shaped case member 03a and a lid member 03b for covering the opening surface of the case member 03a, and after housing the heater in the case member 03a. The cover member 03b covers the opening surface of the case member 03a. In this way, the case member 03a and the lid member 03b are united and screwed to the end of the one face member 02. Furthermore, the trim between the heater box 03 and the other surface material 02 is trimmed.
It is blocked by 4. Therefore, a large number of members and man-hours are required for the process of closing the gap between the pair of face materials 02.

The heat of the heater in the heater box 03 heats the metal heater box 03 and then the packing 07 through the trim 04 and the like to prevent dew condensation and icing. However, most of the heat that heats the heater box 03 is transferred to the metal-made face material 02 that is engaged with the heater box 03, and it is difficult for the heat to be transferred to the synthetic resin trim 04 having low thermal conductivity. As a result, the heat of the heater escapes to the face material 02, and the efficiency of heating the packing 07 via the trim 04 and the like is poor.

The present invention is intended to solve the above problems, and an object thereof is to provide a heat insulating door capable of closing a gap between a pair of face materials with a small number of parts. It is a secondary object to provide a heat insulating door that can improve the thermal efficiency of the dew condensation preventing heater.

[0007]

Insulation door (3) of the present invention
Are a pair of face members (11) arranged at intervals from each other.
A trim (12) which is arranged to be engaged with an end of the face material and closes a gap between the face materials, and a heat insulating material (13) which fills a space between the face materials. I have it. And this heat insulation door has opened and closed the opening (2) of the storage. Further, in order to achieve the above-mentioned object, the trim is made of synthetic resin, extends over the peripheral edge of one surface of the heat insulating door, and is arranged so as to face the opening. A recess (31) is formed in the trim so as to extend in the longitudinal direction. A cover (36) for opening and closing the recess is a synthetic resin hinge (3).
It is molded of synthetic resin integrally with the trim through 5). Further, a packing (15) for sealing the opening is attached to the trim.

A groove (32) capable of holding the cord heater (43) may be integrally formed on the inner surface of the recess.

[0009]

[Operation] A heater for preventing dew condensation can be placed in the recess of the trim of the heat insulation door, and this heater heats the trim. Then, the packing is warmed through this trim.

When the groove is formed on the inner surface of the recess of the trim, a cord heater as a heater for preventing dew condensation can be attached to the groove.

[0011]

EXAMPLES Next, one example of the heat insulating door of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a prefabricated freezer to which a heat insulating door is attached. FIG. 2 is a rear view of the heat insulation door. FIG. 3 is a cross-sectional view of the main parts of FIG. FIG. 4 is an enlarged view of a main part of FIG. FIG. 5 is an assembly exploded plan view. 6A and 6B are explanatory views of the trim. FIG. 6A is a cross-sectional view when the cover is closed, and FIG. 6B is a cross-sectional view when the cover is open.

First, a prefabricated freezer to which a heat insulating door is attached will be described. In FIGS. 1 and 3, a prefabricated freezer serving as a cooling storage is configured by connecting a plurality of heat insulation panels 1 that are assembly panels, and an opening 2 is formed in the front surface of the prefabricated freezer. A storage port frame 4 made of synthetic resin such as vinyl chloride is attached to the end of the heat insulating panel 1 around the opening 2. Further, a heat insulating door 3 is rotatably attached to the storage frame 4 by a hinge 6, and closes the opening 2 so as to be openable and closable.

The heat insulating door 3 comprises a pair of face materials 11, a trim 12, and a heat insulating material 13. Then, the pair of face materials 11 made of a metal plate such as a stainless plate or a coated steel plate is
Trims 12 made of a synthetic resin such as vinyl chloride are arranged to face each other with a space, and the gaps at the periphery of the face material 11 are closed. A heat insulating material 13 such as polyurethane is filled and foamed in the inner space of the heat insulating door 3 thus formed. A packing 15 is attached to the trim 12. The details of the trim 12 and the packing 15 will be described later.

As shown in FIG. 2, the packing 15 extends to the peripheral portion of the back surface of the heat insulating door 3 and has a rectangular frame shape. Further, the bottom surface of the heat insulating door 3 is attached with a rubbed rubber 17 having a U-shaped cross section. And FIG.
, A latch 21 for holding the heat insulating door 3 in a closed state is fixed to the front surface of the heat insulating door 3, and the latch 21
Is provided with a handle 22 for operation. On the other hand, the heat insulating panel 1 has a latch receiver 2 that can be engaged with the latch 21.
3 are provided. Further, an escape handle 24 that rotates the latch receiver 23 in an emergency to release the engagement between the latch 21 and the latch receiver 23 is provided inside the refrigerator.

The face material 11 on the front side of the heat insulating door 3 is
The front surface of the heat insulating door 3 is covered and its end portion is bent at a substantially right angle to form an end surface portion 11a that covers the end surface of the heat insulating door 3 and then further bent inward at a substantially right angle to form the trim 12
A locking portion 11b that engages with is formed. The locking portion 11b is substantially parallel to the front and back surfaces of the heat insulating door 3. On the other hand, the face material 11 on the back side of the heat insulating door 3, that is, the inside of the refrigerator 11
Covers the central portion of the back surface of the heat insulating door 3, and its end portion is bent at a substantially right angle to form a locking portion 11c that engages with the trim 12. The trim 12 covers the peripheral edge of the back surface of the heat insulating door 3 and has a rectangular frame shape. Also, trim 1
At both ends in the width direction of 2, the bifurcated engaging portions 12a, 12
b is formed, and the locking portions 11b and 11c of the face material 11 are formed.
To close the gap between the face materials 11. One of the pair of bifurcated legs of the engaging portions 12a and 12b has a straight cross section and the other leg is arranged inside the heat insulating door 3 and has an L-shaped cross section. There is. In this way, by making the leg portions of the engaging portions 12a and 12b L-shaped, the inner surface of the face material 11 can be stably engaged.

4 to 6, a recess 31 extends in the longitudinal direction in the trim 12, and a pair of grooves 32 are formed on the inner surface of the portion where the recess 31 is formed.
2 is elongated in the longitudinal direction. And the recess 3
A cover 36 is integrally formed on the inner side of 1 in the width direction, that is, at the end portion near the center of the heat insulating door 3, via a synthetic resin hinge 35, and at the outside of the concave portion 31, that is, at the end portion on the peripheral side of the heat insulating door 3. The locking fitting portion 37 is formed. An engaging protrusion 36 a is formed at the tip of the cover 36, and the engaging protrusion 36 a can be engaged with and disengaged from the locking fitting recess 37.

Further, a packing locking portion 39 is formed so as to project outside the recess 31, and a locking recess 39a is formed in the packing locking portion 39. The locking recess 39a. Has an opening on the outer side surface of the packing locking portion 39. The trim 12 configured in this way is integrally extruded from a synthetic resin material such as vinyl chloride, the synthetic resin hinge 35 is a soft synthetic resin such as soft vinyl chloride, and the other parts are hard synthetic resin. For example, it is made of hard PVC.

On the other hand, the packing 15 is provided with a cylindrical portion 15a which is an air chamber, an engaging convex portion 15b which engages with the locking concave portion 39a of the packing locking portion 39, a magnet holding portion 15c and a plurality of fins 15d. ing. The surface of the tubular portion 15a on the heat insulating door 3 side is in contact with the top surface of the packing engaging portion 39,
A magnet holding portion 15c is formed on the opposite surface. The magnet 41 fixed to the magnet holder 15c is magnetically attracted to the stainless steel plate 4a attached to the storage frame 4 when the heat insulating door 3 is closed. The tip of the fin 15d has a trim 12 and a trim 12
It is in contact with the mounting screw B. An air chamber for heat insulation is formed between the fin 15d and the cover 36 of the trim 12.

In order to attach the cord heater 43 for preventing dew condensation to the trim 12 having the above-mentioned structure, as shown in FIG.
In (a), the cover 36 closing the recess 31 of the trim 12 is rotated about the synthetic resin hinge 35 as an axis,
The recess 31 is opened as shown in FIG. Then, the cord heater 43 shown in FIG. 4 is attached to the groove 32 formed on the inner surface of the recess 31. In addition, a lead wire for the cord heater 43 or a heat protector is arranged in the internal space of the recess 31. Then, the cover 36
Is rotated about the synthetic resin hinge 35 as an axis to close the recess 31.

As described above, in the embodiment, the packing 1
The engaging projection 15b of No. 5 engages with the engaging recess 39a of the trim 12, and the engaging recess 39a is opened on the outer side surface of the packing engaging portion 39 formed so as to project on the trim 12. There is. Therefore, when mounting the packing 15, it is not necessary to press the tubular portion 15a of the packing 15.
As a result, the tubular portion 15a of the packing 15 is less likely to be damaged. In the case of the conventional example shown in FIG. 7,
The locking concave portion is opened at the top surface of the packing 07 with which the tubular portion abuts, and the tubular convex portion is struck by, for example, a hammer to push the engaging convex portion, so that when the packing 07 is attached, the tubular portion May be damaged.

The packing 15 sometimes freezes on the storage frame 4 of the heat insulation panel 1, and when the heat insulation door 3 is opened at that time, the packing 15 is pulled in a direction away from the heat insulation door 3. Then, in the case of the conventional example shown in FIG. 7, the engaging convex portion may be separated from the locking concave portion, but in the case of this embodiment, the direction of the locking concave portion 39a is pulled. Since it is oriented at a right angle to the engaging convex portion 15b
Is rarely separated from the locking recess 39a.

Since the recess 31 is opened and closed by a hinge such as a synthetic resin hinge 35, the cord heater 43 can be easily replaced when it breaks down. In the case of the conventional example shown in FIG. 7, the case member 03
Since the a and the lid member 03b are fixed by the screw, it is necessary to remove the screw and disassemble the case member 03a and the lid member 03b when replacing the code heater 43, which is troublesome.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. It is possible to make changes. A modified embodiment of the present invention is illustrated below.

(1) In the embodiment, the trim 12 is made of vinyl chloride, but it may be made of other synthetic resin.

(2) In the embodiment, the face material 11 is a metal plate, but it can be made of other materials such as synthetic resin. (3) The shape of the packing can be changed as appropriate.

(4) In the embodiment, the heat insulating door is attached to the freezer, but it may be attached to other storages such as a refrigerator and a warm storage. (5) In the embodiment, the heater for preventing dew condensation is the cord heater 43, but it is also possible to employ another heating device. (6) In the embodiment, the synthetic resin hinge is configured to be bendable by being formed of a soft synthetic resin. However, other means, for example, the thickness of the synthetic resin hinge is smaller than that of other portions. It is also possible to make it bendable by making it thinner.

[0027]

In the heat insulating door of the present invention, the gap between the pair of face materials is closed by the trim, and the trim is provided with the concave portion. Then, a cover is integrally formed in the recess via a synthetic resin hinge, and the recess and the cover function as a heater box. Therefore, it is not necessary to separately provide a heater box as in the conventional case. As a result, the number of parts and man-hours for mounting work are reduced.

Further, since the heater provided in the recess directly heats the trim, the packing attached to the trim can be efficiently heated. In addition, as in the past, attach the heater to the metal heater box,
When this heater box is engaged with the face material and the trim, most of the heat of the heater is not transferred to the trim but is transferred to the metal face material, and the packing attached to the trim can be efficiently heated. Can not.

Further, when the groove is formed on the inner surface of the recess of the trim, a cord heater as a heater for preventing dew condensation can be attached to this groove. Therefore, the cord heater can be held at a predetermined position, and the work of attaching the cord heater becomes easy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a prefabricated freezer to which a heat insulating door is attached.

FIG. 2 is a rear view of the heat insulation door.

FIG. 3 is a cross-sectional view of an essential part of FIG.

FIG. 4 is an enlarged view of a main part of FIG. 3;

FIG. 5 is an assembled exploded plan view.

6A and 6B are explanatory views of the trim, and FIG. 6A is a sectional view when the cover is closed, and FIG. 6B is a sectional view when the cover is open.

FIG. 7 is a cross-sectional view of a main part of a conventional heat insulating door.

[Explanation of symbols]

 2 Opening 3 Heat-insulating door 11 Face material 12 Trim 13 Heat-insulating material 15 Packing 31 Recess 32 Groove 35 Synthetic resin hinge 36 Cover 43 Code heater

Claims (2)

[Claims] 1. A pair of face materials arranged at intervals from each other, a trim arranged to engage with an end portion of the face material and closing a gap between the face materials, A heat insulating door that is provided with a heat insulating material filled in a space between the face materials and that opens and closes the opening of the storage so that the trim is made of a synthetic resin, and a peripheral edge of one surface of the heat insulating door. And a recess that extends in the longitudinal direction of the trim and that covers the recess so as to open and close. Is formed of synthetic resin integrally with the trim via a synthetic resin hinge, and a packing for sealing the opening is attached to the trim. 2. The heat insulating door according to claim 1, wherein a groove capable of holding a cord heater is integrally formed on an inner surface of the recess.