JPH0743208B2 - Refrigerator insulation box - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heat insulating box of a refrigerator formed by injecting and foaming urethane foam or the like, and in particular, an improvement of means for forming an outer box in the heat insulating box. It is about.

[Prior Art] FIGS. 6 to 9 show the structure of a conventional heat-insulating box and its outer box shown in, for example, Japanese Utility Model Publication No. 60-38148, in which (1) is an outer box. Left and right side plates that form a part of the side plate and have a rear plate between them, (2) is a front girder whose both ends are locked to the lower ends of these side plates, and (3) is a bottom plate that closes the bottom of the outer box. , (4) is the front edge bent wall of each side plate (1),
This is bent inward at a right angle as shown in the figure, then folded back 180 degrees with a constant width, and further folded back 180 degrees to form a clasp groove (5), giving the entire springiness,
In addition, a locking hole (6) is formed in the bent final wall.
Then, both ends of the front girder (2) are inserted into the clamping groove (5), and a reinforcing plate (7) is bent inward at the lower edge along the longitudinal direction thereof. A mounting hole (8) is opened at the end. (9a) is an auxiliary metal fitting for connecting the side plates (1), the front girders (2) and the bottom plate (3) to each other. The upper plate part (10), the front plate part (11) and the lower plate part (12). The upper plate (10) is provided with a support piece (14) which is isolated by a notch groove (13) and protrudes in the same direction so that one end of the bottom plate (3) can be clamped. Further, a door hinge mounting screw hole (15) is formed in the front plate portion (11), and one side end portion is press-fitted into the fitting groove (5) of the side plate (1). It has a locking piece (16) which engages with the stop hole (6). Further, the lower plate portion (12) is provided with a mounting hole (17) for the front beam (2) and a leg mounting hole (18).

In such a structure, first, the front end portion of the front girder (2) is inserted into the holding groove (5) of the front edge folding wall (4) of the side plate (1),
Next, the locking piece (16) of the auxiliary metal fitting (9a) is press-fitted. In that case, first, the retaining groove (5) is opened, the locking piece (16) is engaged with the retaining hole (6) as shown in FIG. 8, and the retaining groove (5) is closed and fixed to each other. It In this state, the auxiliary metal fitting (9a) and the front girder (2) are screwed into the mounting holes (8) and (17), and the screw (19)
Fix with. Next, by utilizing the notch (13) in the upper plate part (10) of the auxiliary metal fitting (9a), the front edge part of the bottom plate (3) is inserted thereon to complete the assembly of the lower front part of the outer box. Is.

[Problems to be Solved by the Invention] Since the outer box of the conventional heat insulating box is configured as described above, in order to fix the bottom plate (3), the auxiliary metal fitting (9
a) A support plate (14) separated by the upper plate part (10) and the notch groove (13) is required, which increases the number of processing steps by that amount, and the work plate has a thin wall plate. Push down the supporting piece (14) at the front edge of the notch groove (13).
However, there is a problem that the bottom plate (3) is deformed as shown in FIG. 9 and the urethane urethane foam leaks to the outside due to this deformation.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to manufacture an auxiliary metal fitting for connecting a front girder and a bottom plate at low cost, and to obtain a heat insulating box body capable of preventing leakage of injected urethane foam due to deformation of the bottom plate. The purpose is to

[Means for Solving the Problem] In an outer box of a heat insulating box according to the present invention, a recess (22) having a U-shaped cross section is formed at a lower end edge of a front girder (2) and extends along the longitudinal direction thereof. The front edge flange (20) of the bottom plate (3),
It is fitted and locked in the recess (22) together with a columnar elastic buffer (23) that is polymerized and fixed to the back surface.

[Operation] In the outer box of the heat insulating box of the present invention, the upper plate portion, the separating groove and the supporting piece in the conventional example can be eliminated from the auxiliary metal fitting for connecting the front girder and the both side plates.

[Embodiment] An embodiment of the present invention will be described below. That is, in FIG. 1 to FIG. 3, the same or corresponding parts as those in FIG. 7 are designated by the same reference numerals and their duplicate description will be omitted, but the front edge of the bottom plate (3) of the present invention will be omitted. In one example, an L-shaped front edge flange (20) is formed so as to project downward by a predetermined width, and a columnar elastic buffer (23) is superposed and fixed to the back surface thereof. On the other hand, steel plate front girder (2)
As shown in the figure, a concave portion (22) having a U-shaped cross section which is extended along the longitudinal direction is formed in the lower edge portion of the concave portion (22) by bending the portion, for example. The edge flange (20) is fitted and locked together with the columnar elastic buffer (23),
As a result, the upper plate portion (10), the cut groove (13) and the support piece (14) in the conventional example are eliminated from the auxiliary metal fitting (9). Incidentally, FIG. 2 shows the fitted state of the front girder (2) and the bottom plate (3).

In the above structure, when fixing the bottom plate (3), an elastic shock absorber (23) is first polymerized and fixed to the back surface of the front edge flange (20) as shown in FIG. These are fitted and locked in the recess (22) of (2).

In the above embodiment, the case where the lower edge portion of the front girder (2) is formed with the concave portion (22) having a U-shaped cross section by bending the portion is described, but as shown in FIG. A cut-and-raised piece (24) is provided in the middle of the lower edge to form a similar recess (22), or as shown in FIG. 5, a horizontal shaft (25) is provided on the back surface in the middle of the lower edge of the front girder. The same concave portion (22) may be formed by sticking.

[Effect of the invention] Since the outer box of the heat insulating box of the refrigerator of the present invention is configured as described above, the workability of assembling the side plates, front girder and bottom plate is good, and the cost of the auxiliary metal fitting is also low, In addition, the bottom plate is not deformed during assembly, and the column-shaped elastic cushion is pressed against the back surface of the lower edge of the front girder, so this is a reliable seal against leakage of injected urethane foam. The effect of acting is also obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a main part of an outer box of a heat insulating box of a refrigerator of the present invention, FIG. 2 is a perspective view showing a connected state of a front girder and a bottom plate in the present invention, and FIG. 3 is an assembly thereof. FIG. 4 is a perspective view showing the method, FIGS. 4 and 5 are equivalent views of FIG. 3 showing another embodiment of the present invention, FIG. 6 is a perspective view of a general heat insulating box of this kind, and FIG. 1 is an exploded perspective view of a conventional example corresponding to FIG. 1, FIG. 8 is a horizontal cross-sectional view showing its assembled state, and FIG. 9 is a perspective view of essential parts showing a deformed state of a bottom plate. In the figure, (1) is a side plate, (2) is a front girder, (3) is a bottom plate, (20) is a front edge flange, (22) is a recess, and (23) is an elastic cushioning body. In the other figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A left and right side plate, a rear plate between them, a front girder having both ends locked to the lower bottom parts of the both side plates, and a front edge flange abutting against the back side of the front girder to form a bottom part. A heat-insulating box body formed by forming an outer box with a closing bottom plate and injecting urethane foam between the outer box and the inner box, and extending along the longitudinal direction at the lower end edge of the front girder. A refrigerator characterized in that a recess having a U-shaped cross section is formed, and the front edge flange of the bottom plate is fitted and locked in the recess of the front girder together with a column-shaped elastic buffer body that is polymerized and fixed to the back surface thereof. Insulation box body.