JP2551339Y2 - Door opening and closing device for refrigerator machine room - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door which is attached to the front of a machine room of a refrigerator or a freezer and opens and closes an opening thereof, and relates to a door opening / closing device capable of maintaining the open state of the door.

[0002]

[Technical background] Refrigerators for display and sale of products (including freezers)
Is a refrigerator main unit A serving as a product storage unit as shown in FIG.
A machine room B is formed in the upper part, and a refrigeration cycle unit such as a radiator a and a condenser b is provided in the machine room B. The front of the machine room B is opened and can be freely opened and closed by a door D. The door D is opened to clean the filter in the machine room B, check and repair the refrigeration cycle.

[0003]

2. Description of the Related Art A conventional opening and closing device for a door D is disclosed in Japanese Utility Model Laid-Open No. 60-83174. As shown in FIG. 4 and FIG.
Joining bracket 11 toward upper surface of upper beam 10 of machine room B opening Q
(See FIG. 1).
A base 11a extending from an upper edge of the door D to the upper surface of the upper beam 10 and reaching the locking hole 12 of the upper beam 10;
The opening and closing operation of the door D is made up of a rearwardly downwardly inclined piece 11b which comes into contact with the front edge of the locking hole 12 of the upper beam 10 from the leading edge to the inside of the locking hole 12. As shown in (), the contact is made with the contact portion C between the elastic body 11c of the inclined piece 11b and the front edge of the upper beam 10 locking hole 12 as a fulcrum.

[0004] As shown in FIG. 1C, the projection 11 d of the inclined piece 11 b of the coupling fitting 11 and the projection 13 on the inner surface of the front edge of the locking hole 12 of the upper beam 10 are locked, so that the door D is locked. Further opening is prevented, and as shown in FIG. 4, the support rod 20 from the upper edge of the refrigerator main body A is hooked on the door D, and the door D
Maintain the open state of.

[0005]

In the above-mentioned prior art, since the operation of locking the support rod 20 is troublesome, and particularly at a high place, the scaffold of the operator is unstable, and improvement is desired. It is also desired to reduce costs by reducing the number of parts.

The present invention has been made in consideration of the above points, and has an object to eliminate the support rod 20.

[0007]

According to the present invention, in order to solve the above-mentioned problem, a hook-shaped engaging member facing the door is provided on the upper surface of the base of the connecting metal fitting in the above-mentioned known door opening and closing device. The stopper piece is provided to protrude upward, and its protruding length is latched by rotation of a coupling fitting with a contact point between a bent portion from the base piece to the inclined piece and a front edge of the upper beam locking hole as a fulcrum. A piece can enter the locking hole, and a projection is formed on the inner surface of the upper beam on the trailing edge side of the locking hole to lock the hook of the locking piece.

In place of the projection, a hole may be formed on the trailing edge side of the locking hole of the upper beam so that a hook portion of the locking piece enters.

[0009]

The door opening / closing apparatus according to the present invention having the above-mentioned structure is provided with the lower edge of the door being raised upward in the same manner as in the prior art, with the contact portion between the joint fitting and the front edge of the upper beam locking hole as a fulcrum. The door rotates and the front of the machine room is opened.

[0010] In the opening operation, when the locking piece of the fitting is inserted into the locking hole of the upper beam, the door is pushed slightly backward and pivots backward to the front, so that the fitting is locked to the front edge of the locking hole. And the locking piece is locked to the projection or hole. With this locking,
Rotation of the door to the front side is prevented, and the open state is maintained. If this operation is reversed, the lock is released and the door can be closed.

[0011]

As shown in FIGS. 1 and 2, this embodiment relates to a refrigerator for merchandise display and sale. A refrigeration cycle unit and the like are provided in a machine room B above a refrigerator main body A as in the prior art. A door D for opening and closing the opening is provided on the front surface.
A lid is appropriately provided on the upper surface of the machine room B. From both sides of the upper edge of the door D, a connection fitting 21 is provided toward the upper surface of the upper beam 10 of the opening of the machine room B. As shown in FIG. A base piece 21a that overlaps the upper surface of the upper beam 10 and reaches the locking hole 12 of the upper beam 10; and a leading edge of the base piece 21a contacts the front edge of the locking hole 12 of the upper beam 10 and extends into the locking hole 12. And a downwardly inclined piece 11b.

On the upper surface of the base piece 11a, a hook-shaped locking piece 23 is provided to protrude upward toward the door D.
A projection 24 is formed on the inner surface on the trailing edge side of the 0 locking hole 12.

Accordingly, from the state in which the door D shown in FIG. 2A is closed, the door D is rotated upward with the lower portion of the door D as shown in FIG. At
When the locking piece 23 of the coupling metal 21 enters the locking hole 12 of the upper beam, the door D is pushed slightly backward (see the arrow (b) in the figure), and the coupling metal 21 (base piece 21a) is moved. When the front edge of the locking hole 12 is slid and the locking piece 23 reaches the rear edge side of the locking hole 12 of the upper beam 10, the door D is slightly rotated backward to the front side.
The third hook 23a is locked to the projection 24 (FIG. 3 (c)).
At this time, as shown by the chain line in FIG. 1, since the door D is substantially horizontal and its weight acts in the closing direction, the locking prevents the door D from rotating and maintains the open state. Is done. If the above operation is reversed, the lock is released and the door D can be closed.

In the embodiment shown in FIG.
The hook 25 a of the locking piece 23 enters and locks the hole 25, and the door D is kept open by the same operation as that of the projection 24.

[0015]

The present invention is constructed as described above, and the door opening state is maintained by the locking by the turning operation of the door. It is easy to operate and much easier than the supporting rod.

Further, the support rod is not required, the number of parts is reduced, and the cost is reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment.

FIGS. 2A to 2C are explanatory diagrams of the operation of the embodiment.

FIGS. 3 (a) to 3 (c) are explanatory diagrams of an operation of another embodiment.

FIG. 4 is a perspective view of a main part of a conventional example.

FIGS. 5A to 5C are explanatory diagrams of an operation of a conventional example.

[Explanation of symbols]

 A Refrigerator body B Machine room C Contact part D Door 10 Upper beam 12 Locking hole 11, 21 Joint fitting 11a, 21a Base piece 11b, 21b Inclined piece 23 Locking piece 23a Hook part 24 Projection 25 hole

Claims (2)

(57) [Scope of request for utility model registration] A door for opening and closing the opening is provided on the front of the machine room at the upper part of the refrigerator main body, and a connecting fitting is provided from both upper edges of the door toward the upper beam upper surface of the opening of the machine room. When the door is closed, the upper edge of the door overlaps with the upper surface of the upper beam, the base piece reaches the locking hole of the upper beam, and the leading edge of the base piece contacts the front edge of the locking hole of the upper beam. A door opening and closing device for a refrigerator machine room comprising a rearwardly downwardly inclined piece reaching the inside of the locking hole, wherein a hook-shaped locking piece facing the door is provided on the upper surface of the base piece so as to protrude upward, and the protruding length is provided. It is assumed that the locking piece can enter the locking hole by rotation of the coupling metal with the contact point between the bent portion from the base piece to the inclined piece and the front edge of the upper beam locking hole as a fulcrum, And a projection formed on the inner surface of the rear edge side of the locking hole of the upper beam to be locked to the hook of the locking piece. The machine room of the door opening and closing device. 2. The door opening and closing device for a refrigerator machine room according to claim 1, wherein a hole is formed in the rear edge of the locking hole of the upper beam, into which a hook portion of a locking piece enters instead of the projection. Door opening and closing device for refrigerator machine room.