JPH018938Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention includes a locking device disposed inside the door shell, the lock pin of which is protruded from an insertion hole formed in the door shell, and attached to the refrigerator body. This invention relates to an insulating door of a refrigerator that is engaged with each other.

[Technical background of the invention and its problems]

Conventionally, in this type of insulated door, a styrofoam surrounding member is provided inside the door shell to surround the locking device and its lock pin disposed inside the door shell, and this surrounding member allows the inside of the door shell to be protected. In addition to preventing the heat insulating material filled in the lock device from entering the lock device side, the surrounding member also serves as a heat insulating material.

By the way, the polystyrene foam that constitutes the surrounding member has poorer heat insulating properties than urethane, which is generally used as a heat insulating material, so the surrounding member must be made thicker in order to obtain a predetermined heat insulating effect. For this reason,
The part of the back surface of the door shell that corresponds to the locking device protrudes backwards, which places restrictions on the placement of the food storage pocket formed on the back surface of the door shell. In addition to sacrificing the ability to store food, there was also the disadvantage that the volume inside the refrigerator body was reduced by the rearward protrusion of the door shell.

In order to solve these conventional drawbacks, a cover having a through hole through which the lock pin passes is provided to surround the lock device, and a lock pin is inserted between the through hole formed in the outer shell of the door and the through hole for the lock pin to pass through. By providing a guide tube that is movably inserted through the door shell and filling the inside of the door shell with a heat insulating material, it is possible to fill the inside of the door shell in the area previously occupied by the Styrofoam enclosing member. It is considered that the structure is filled with a heat insulating material.

However, with such a configuration, there is a risk that the guide tube into which the lock pin is inserted may be slightly deformed due to the foaming pressure and reaction heat during foaming of the insulation material, and if the guide tube is deformed in this way, the guide tube There is a risk that the inner surface of the lock pin may come into pressure contact with the lock pin, adversely affecting the operation of the lock pin.

[Purpose of invention]

Therefore, an object of the present invention is to provide a door shell in which a locking device is disposed within the door shell, so that the portion of the back surface of the door shell that corresponds to the locking device does not need to protrude backwards. We have created an insulated refrigerator door that allows food storage pockets to be formed at optimal positions on the back of the door shell, increases the internal volume of the refrigerator body, and does not adversely affect the operation of the lock pin. It is on offer.

[Summary of the idea]

The present invention provides a cover having a through hole through which the lock pin is inserted so as to surround the lock device, an insertion hole formed in the outer shell of the door for the lock pin insertion, and a guide for movably inserting the lock pin between the through hole. By providing a cylinder and forming the middle part of the lock pin with a small diameter, it is possible to fill the inside of the door shell with the heat insulating material in the part occupied by the conventional Styrofoam surrounding member. In addition, even if the guide cylinder is deformed due to the foaming pressure and reaction heat during foaming of the insulation material, the middle part of the lock pin, which corresponds to the part that is most easily deformed, has a smaller diameter, so that the deformed part of the guide cylinder is This prevents the locking pin from coming into pressure contact with the locking pin.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, reference numeral 1 denotes a refrigerator body, which is formed by forming a heat insulating wall 3 on the inner surface of an outer box 2, and an engagement hole 4 formed in the lower surface of the upper front end of the refrigerator body 1. ing. Reference numeral 5 denotes a heat insulating door that opens and closes the front opening of the refrigerator body 1, and this will be described in detail below. Reference numeral 6 denotes a door shell, which consists of a door outer panel 7, upper and lower side frames 8 and 9, and a door inner panel 10, as shown in FIG. The door outer plate 7 is formed, for example, by bending the left and right sides of a rectangular steel plate into a substantially U-shape to provide flanges 7a and 7b extending inward. Upper and lower side frames 8,
Reference numeral 9 is made of plastic, for example, and is formed in the shape of a long and narrow rectangular container with one side open, and the inner surface thereof is provided with a door outer plate holding rib 11 and an anchor rib 12 (only the upper frame 8 is shown in FIG. 4), respectively. It is set up. Furthermore, an insertion hole 13 is formed in the left side of the upper frame 8, as shown in FIGS. 1 and 2. The door inner plate 10 is made of plastic, for example, and is provided with protrusions 10a and 10b for forming food storage pockets for eggs, bottles, and the like. Therefore, both side frames 8 and 9 are provided at both upper and lower ends of the door outer panel 7.
(Only the upper frame 8 is shown in FIGS. 1 and 4) and insert the end of the door outer panel 7 between the front inner surfaces of both side frames 8 and 9 and the door outer panel holding rib 11. At the same time, the upper and lower edges of the door inner plate 10 are positioned on the rear outer surfaces of the side frames 8 and 9, and the door inner plate 1
The left and right edges of 0 are attached to the flange parts 7a, 7 of the door outer panel 7.
b, and place the door inner plate 10 on both side frames 8,
9 and the flange portions 7a and 7b. Reference numeral 14 denotes a locking device disposed inside the door shell 6, which is inserted into a mounting hole 15 (see Fig. 3) formed in the door shell 7, and is inserted into a substantially U-shaped locking device from the inside of the door shell 7. It is fixed with a leaf spring 16. This locking device 14 is provided with a pin 14a that rotates as a unit when the key 17 is inserted and rotated. Reference numeral 18 denotes a lock pin whose upper end can protrude from the insertion hole 13 of the upper frame 8, and the connecting member 1 has an elongated hole 19a extending horizontally at its lower end.
9 is fixed, and the pin 14a of the locking device 14 is inserted into the elongated hole 19a of this connecting member 19. As a result, the lock pin 18 is moved up and down by the pin 14a, which rotates together with the insertion rotation of the key 17. When the lock pin 18 is moved upward and protruded from the insertion hole 13, the upper end of the lock pin 18 is inserted into the engagement hole 4 of the refrigerator body 1.
The intermediate portion of this lock pin 18 is formed to have a small diameter to provide a small diameter portion 18a. Reference numeral 20 denotes a cover provided to surround the locking device 14, which has a cylindrical through hole 21 on its upper surface through which the lock pin 18 passes, and a flange portion 2 on the front opening edge.
It has 2. Flange portion 2 of this cover 20
2 is fixed to the inner surface of the door outer panel 7 with adhesive tape, hot melt adhesive, or the like. Reference numeral 23 denotes a guide tube made of plastic, for example, into which the lock pin 18 is movably inserted, and its upper and lower ends are connected to the insertion hole 13 of the upper frame 8 and the through hole 21 of the cover 20, respectively.
The flange 23a formed at the upper end of the upper frame 8 is brought into contact with the upper surface of the upper frame 8. 24 is the door shell 6
This is urethane that acts as an insulating material filled inside.
In this embodiment, the guide tube 23 and the insertion hole 1
3. Set so that there is no fitting gap between the through hole 21 and the guide tube 23 and the insertion hole 13,
The urethane 24 is prevented from leaking from between the through hole 21 and the through hole 21.

Next, the procedure for manufacturing the heat insulating door having the above configuration will be described. First, the locking device 14 is inserted into the mounting hole 15 of the door outer panel 7.
is fixed with a leaf spring 16. After inserting the lock pin 18 into the through hole 21 of the cover 20 from the inside, the cover 20 is placed over the lock device 14 and the pin 1
With the elongated hole 19a of the connecting member 19 inserted into the connecting member 4a, the flange portion 22 is attached to the inner surface of the door outer panel 7 with adhesive tape.
Fix with hot melt adhesive, etc. and,
A door outer shell 6 is assembled by integrating a door outer plate 7, upper and lower side frames 8, 9, and a door inner plate 10. After that, guide cylinder 2
3 through the insertion hole 13 of the upper frame 8, the guide tube 23 is inserted through the outside of the lock pin 18, and the lower end of the guide tube 23 is inserted into the through hole 21 of the cover 20, and the flange 23a is inserted. It is brought into contact with the upper surface of the upper frame 8. At this time, the guide tube 23 is locked by the lock pin 18.
, the lower end of the guide tube 23 can be easily introduced into the through hole 21. Finally, when the inside of the door shell 6 is filled with urethane 24 and foamed, a heat insulating layer of the urethane 24 is formed inside the door shell 6 on the outside of the cover 20 and the guide tube 23.

Therefore, when the urethane 24 is foamed, the guide tube 2
3 may be slightly deformed by the foaming pressure and reaction heat of the urethane 24. The upper and lower ends of the guide tube 23 are connected to the insertion hole 13 of the upper frame 8 and the cover 2, respectively.
Since the guide tube 23 is supported at the through hole 21 of 0, when the guide tube 23 is deformed, the middle portion of the guide tube 23 is mainly deformed. Even if the guide tube 23 is deformed in this way, the small diameter portion 18 remains in the middle portion of the lock pin 18.
a is provided, the deformed portion of the guide tube 23 does not come into pressure contact with the small diameter portion 18a, and therefore, the vertical movement of the lock pin 18 is not adversely affected by the deformation of the guide tube 23 and is always maintained. The lock pin 18 can be moved up and down smoothly.

Incidentally, even if the entire lock pin is formed to have a diameter approximately equal to the small diameter portion 18a, deformation of the guide cylinder 23 can be dealt with, but in this case, the lock pin will shake considerably inside the guide cylinder 23. Well, the lock isn't working properly.

On the other hand, in this embodiment, focusing on the fact that the deflection deformation of the guide tube 23 is larger in the middle portion of the guide tube 23, only the middle portion of the lock pin 18 is formed to have a small diameter. While sufficiently dealing with the deformation of the cylinder 23, the lock pin 18 can be prevented from rattling as much as possible by the large diameter portions at both the upper and lower ends.

[Effect of idea]

As is clear from the above description, the present invention has a structure in which a cover is provided to surround the locking device, and a guide tube through which the lock pin is movably inserted is provided, so that the outer periphery of the cover and guide tube has a heat insulating property. Therefore, unlike the conventional method in which a Styrofoam member with poor insulation properties is placed on the back of the locking device, the back of the door shell can be filled with an excellent insulating material that corresponds to the locking device. There is no need for the part to protrude backwards, and thus the food storage pocket can be formed at a desired position on the back surface of the door shell, and the internal volume of the refrigerator body can be increased.
Furthermore, we focused on the fact that the deflection deformation of the guide cylinder due to the foaming pressure and reaction heat during urethane foaming occurs more greatly in the middle part of the guide cylinder, so we formed the middle part of the lock pin to have a smaller diameter, so that the guide cylinder does not deform. However, the vertical movement of the lock pin is not adversely affected, and the lock pin can always be moved up and down smoothly, and the large diameter portions at both the upper and lower ends of the lock pin prevent the lock pin from shaking as much as possible. It has excellent effects.

[Brief explanation of drawings]

The drawing shows one embodiment of the present invention.
The figure is a longitudinal sectional view of the main parts, Fig. 2 is an exploded perspective view of the door shell, Fig. 3 is an exploded perspective view of the main parts, and Fig. 4 is a longitudinal sectional view showing the upper structure of the door shell. be. In the drawings, 1 is the refrigerator body, 5 is the insulating door, 6 is the door shell, 13 is the insertion hole, 14 is the locking device, 18 is the lock pin, 18a is the small diameter part, 20 is the cover, 21 is the through hole, and 23 is the The guide tube 24 is urethane (insulating material).

Claims (1)

[Scope of utility model registration request] A lock device disposed within a door shell and having a lock pin protrude from an insertion hole formed in the door shell to engage the refrigerator body; A cover having a through hole, a guide tube provided between the insertion hole and the through hole through which the lock pin is movably inserted, and a heat insulating material filled inside the door shell, An insulating door for a refrigerator characterized by having a small diameter section.