JP4092263B2 - Heat insulation box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a heat insulating box constituting a refrigerator or the like, in particular, a portion for attaching equipment members such as shelf columns by rivets.
[0002]
[Prior art]
In a general refrigerator, in order to provide a shelf in the refrigerator compartment, a shelf column is attached to the wall surface of the refrigerator compartment. Specifically, a rivet hole is formed at a predetermined position on the wall surface of the refrigerator compartment, and after the shelf pillar is applied to the wall surface, the rivet is fixed by caulking from the insertion hole of the shelf pillar to the rivet hole of the wall surface. (For example, refer to Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2002-78552
[Problems to be solved by the invention]
On the other hand, the main body of the refrigerator is composed of a heat insulating box body in which a heat insulating material is foam-filled between an outer box and an inner box assembled with a space therebetween, and therefore the rivet holes constitute the wall of the refrigerator compartment. It will be formed in advance in the inner box.
For this reason, in the process of manufacturing a heat insulation box, the insulation is filled with tape or the like so that the foam-filled heat insulating material does not leak from the rivet hole, but usually there are a plurality of shelf columns extending from both side walls to the back wall of the refrigerator compartment. Since the book can be attached and the number of rivet holes to be formed is correspondingly increased, there is a problem in that it takes time for the work of the weathering.
The present invention has been completed based on the above-described circumstances, and an object of the present invention is to increase the manufacturing efficiency by eliminating the need for the work of rivet holes.
[0005]
[Means for Solving the Problems]
Invention 請 Motomeko 1 is a heat-insulating main body which heat insulating material on the outer shell body is foam filling, the outer the shell rivet holes are formed, fitting part is devoted to the surface of the outer shell In what is fixed by caulking the rivet attached to the equipment member through the rivet hole, the rivet hole is formed in a state in which a punching plate is fitted and retained by half-punching , The punching plate is pressed into a chevron shape and the springback function makes the peripheral edge of the punching plate pressed against the edge of the rivet hole .
[0006]
According to a second aspect of the invention, there is provided a connector described in claim 1, and the hole edge of the front Symbol rivet hole and the peripheral edge of the vent plate, and connected by connecting portions of Oite narrow the part of the circumferential direction, wherein The punching plate is characterized in that it can rotate around the connecting portion side as a fulcrum .
[0007]
[Action and effect of the invention]
<Invention of Claim 1>
The rivet hole is formed by punching the outer shell with, for example, a punch and a die. At this time, the punch is not completely punched, but a so-called half punching process is performed by limiting the advancement amount of the punch. In this half punching process, in the part corresponding to the hole edge of the rivet hole, a crack is generated on both the front and back sides by receiving a shearing force, and when this is connected, the peripheral edge of the punch plate is divided from the hole edge of the rivet hole. The punching plate does not completely come out of the rivet hole, but only shifts in the thickness direction in the rivet hole, so that it fits as if it was press-fitted and stays in the rivet hole.
In other words, since the rivet hole formed in the outer shell is in the state of being blocked by the punching plate, when the heat insulating material is foamed and filled in the outer shell, It prevents the insulation from leaking.
When attaching the mounting member, when the rivet is pushed into the rivet hole, the rivet passes through the rivet hole while the punching plate is pushed open, and is subsequently fixed by being caulked.
According to the present invention, in the process of manufacturing a heat insulating box, it is not necessary to stretch the rivet holes with a tape or the like, and the manufacturing efficiency can be greatly increased.
[0008]
In addition, when the punching plate is pressed into a chevron shape, the peripheral edge of the punching plate is strongly pressed against the edge of the rivet hole by the springback function that the crest tries to return to a flat plate shape. The plate is difficult to be removed from the rivet hole.
<Invention of Claim 2 >
By partially connecting the edge of the rivet hole and the periphery of the punching plate, the punching plate can be more firmly fastened in the rivet hole. Moreover, when pushed with a rivet, it is pushed open so as to rotate with the portion where the punching plate is connected as a fulcrum, and the rivet can be inserted smoothly.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
<First Embodiment>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the case where the shelf pillar 20 is attached to the wall surface of the refrigerator compartment 15 in a vertical refrigerator is illustrated.
In FIG. 1, the code | symbol 10 is the heat insulation box which comprises a refrigerator main body, has comprised the vertically long shape which opened the front surface, and the outer box 11 and the inner box 12 which consist of a stainless steel plate are assembled | attached at intervals, A heat insulating material 13 made of foamed resin such as foamed urethane is filled between the boxes 12 and 13.
[0010]
The inside of the heat insulation box 10 is a refrigeration chamber 15, and therefore the wall surface of the refrigeration chamber 15 is constituted by the inner box 12, and the shelf columns 20 are vertically oriented at predetermined positions on the side wall and the back wall of the refrigeration chamber 15. It can be attached.
The shelf column 20 is formed by press-molding a stainless steel plate or the like. As shown in FIGS. 2 and 5, the shelf column 20 is formed in a vertically long shape provided by projecting the contact plate 22 from both hems of the channel-shaped main body 21. Has been. On the surface of the main body portion 21, a plurality of latching holes 23 for detachably latching a shelf holder (not shown) to support the shelf are opened at a predetermined pitch.
In addition, a mounting recess 24 having a bottomed cylindrical shape is formed at the back side at each position at an appropriate interval along the length direction on the surface of the main body 21. The depth of the mounting recess 24 reaches the position of the bottom of the main body 21, and an insertion hole 26 for the rivet 40 is formed at the center of the bottom plate 25.
[0011]
On the other hand, a plurality of rivet holes 30 are formed on the surface 12A to which the shelf column 20 of the inner box 12 is attached, corresponding to the insertion hole 26 on the shelf column 20 side.
As shown in FIG. 3A, the rivet hole 30 is formed by punching the inner box 12 with a punch P and a die D. However, the rivet hole 30 is not completely punched at this time, but is shown in FIG. As described above, by limiting the advancement amount of the punch P to just before the die D, so-called half punching is performed. In this half punching process, cracks c are generated on both sides of the front and back by receiving a shearing force in the portion corresponding to the hole edge of the rivet hole 30, and the peripheral edge of the punching plate 31 is divided from the hole edge of the rivet hole 30 by this connection. However, the punching plate 31 does not completely come out of the rivet hole 30 but only shifts in the thickness direction within the rivet hole 30.
That is, as shown in FIG. 4, the punching plate 31 is fitted in as if it was press-fitted and stayed in the rivet hole 30 in a state of being slightly shifted to the back surface side.
[0012]
The present embodiment has such a structure, and in manufacturing the heat insulating box 10, the outer box 11 and the inner box 12 are assembled with a gap therebetween as described above. As shown in FIG. The heat insulating material 13 is foam-filled between the boxes 12 and 13. Here, although the rivet holes 30 are formed in the inner box 12, the heat insulating material 13 may leak from the rivet holes 30 because each rivet hole 30 is in a state where the punch plate 31 is fitted and closed. It is prevented.
[0013]
On the other hand, the shelf column 20 is attached by the rivet 40 as follows. As shown in FIG. 5, the rivet 40 has an iron core wire 43 inserted into a metal body 42 such as a stainless steel having a rivet head 41 at one end, and a head portion at the tip. 44 has a structure assembled in a state where it is locked in a locking recess 45 at the end of the main body 42 opposite to the side where the rivet head 41 is provided.
[0014]
As an attachment procedure, first, the rivet 40 is attached to a dedicated tool (not shown), and is inserted from the surface side of the shelf column 20 into the insertion hole 26 of the attachment recess 24 as shown by the arrow in FIG. . Next, as shown in FIG. 6, the tip of the rivet 40 that protrudes from the back surface side of the shelf column 20 is formed on the mounting surface 12A while the back surface of the shelf column 20 is applied to the mounting surface 12A of the inner box 12. When pushing toward the rivet hole 30, the rivet 40 is put into the rivet hole 30 while the punching plate 31 is pushed open. At this time, the rivet holes 30 corresponding to the insertion holes 26 of the shelf columns 20 are also aligned with each other in other parts.
[0015]
Next, when the tool is operated and the core wire 43 is pulled, as shown in FIG. 7, the core wire 43 is cut halfway while the other end side of the main body 42 is caulked by the head portion 44, and the punching plate 31 is tilted and pressed. Meanwhile, a new rivet head 46 is formed. Accordingly, the bottom plate 25 of the mounting recess 24 of the shelf column 20 and the mounting surface 12A of the inner box 12 are sandwiched and fixed between the rivet heads 41 and 46. Similarly, in the other attachment parts, the rivet 40 enters the rivet hole 30 while pushing the punching plate 31 open and is fixed by being caulked.
[0016]
As described above, in the present embodiment, when the rivet hole 30 is formed in the inner box 12, the punching plate 31 is fastened by half-punching so that the rivet hole 30 is closed, and thus the heat insulating box 10 is manufactured. In the process, the rivet holes 30 do not need to be lined with tape or the like to prevent the heat insulating material 13 to be foam-filled from leaking. As a result, the manufacturing efficiency of the heat insulating box 10 can be significantly increased.
[0017]
Second Embodiment
FIG. 8 shows a second embodiment of the present invention. In the second embodiment, in addition to a structure in which the punching plate 31A fits and stays in the rivet hole 30 by half-punching, the punching plate 31A itself forms a mountain shape whose center portion bulges to the back side. So that it is pressed.
With this structure, the peripheral edge of the punching plate 31 </ b> A is strongly pressed against the hole edge of the rivet hole 30 by a springback function in which the mountain tries to return to a flat plate shape. As a result, it is difficult for the punching plate 31 </ b> A to come off the rivet hole 30 during the transportation of the inner box 12.
Further, since the punching plate 31A has a mountain shape that bulges to the back surface side, when the rivet 40 is pushed into the rivet hole 30, the tip of the rivet 40 hits the back surface of the punching plate 31A, and the rivet 40 is pushed straight. In other words, it can serve as a guide.
[0018]
<Third Embodiment>
FIG. 9 shows a third embodiment of the present invention. In the third embodiment, in addition to the half punching process, the hole edge of the rivet hole 30 and the peripheral edge of the punching plate 31B are connected by a small connecting portion 33 in a part in the circumferential direction. It is desirable that the connecting portion 33 is provided at two places or only one place within a range of 90 degrees.
In the third embodiment, the punching plate 31B can be more firmly fastened in the rivet hole 30. Further, since the connecting portion 33 is provided in the above arrangement, when the rivet 40 is pressed, the punching plate 31B is pushed open so as to turn sideways with the connecting portion 33 side as a fulcrum, and the rivet 40 is smoothly inserted. Is done.
In addition, you may make it connect a part of the periphery of the mountain-shaped punching board 31A shown in 2nd Embodiment with the hole edge of a rivet hole.
[0019]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) In addition to the refrigerator exemplified in the above embodiment, the present invention is similarly applied to a case where a shelf column is attached to a wall surface of a refrigerated showcase, a table-type refrigerator, or another heat insulating storage with rivets. Can be applied.
(2) Also, when attaching various equipment members to the outer surface of the heat insulation box, the main point is that it can be widely applied to the case where the equipment members are attached to the surface of the outer shell constituting the heat insulation box by rivets. It is.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a refrigerator according to a first embodiment of the present invention. FIG. 2 is a perspective view showing a mounting portion of a shelf column. FIG. 3 is an explanatory diagram of half-punching processing. Cross-sectional view of the rear rivet hole [Fig. 5] Flat cross-sectional view of the state before the shelf column is secured with the rivet [Fig. 6] Flat cross-sectional view of the rivet being pushed into the rivet hole [Fig. FIG. 8 is a cross-sectional view of a rivet hole in the vicinity of a half-cut-out process according to a second embodiment of the present invention. FIG. 9 is a half-cut-out process according to a third embodiment of the present invention. Front view near rear rivet hole [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Thermal insulation box 11 ... Outer box (outer shell body) 12 ... Inner box (outer shell body) 12A ... Mounting surface 13 ... Heat insulating material 20 ... Shelf column (equipment member) 24 ... Mounting recessed part 26 ... Insertion hole 30 ... Rivet Hole 31, 31A, 31B ... punching plate 33 ... connecting part 40 ... rivet

Claims (2)

A heat insulating box body in which a heat insulating material is foam-filled in an outer shell body, and a rivet hole is formed in the outer shell body, and an equipment member is applied to the surface of the outer shell body and attached to the equipment member. In what is fixed by caulking a rivet through the rivet hole,
The rivet hole is formed in a state in which the punching plate is fitted and retained by half-punching processing , and the punching plate is pressed into a chevron shape , and the periphery of the punching plate is formed by the spring back function. A heat insulating box characterized by being pressed against the edge of the hole . And the peripheral edge of the punching plate and the hole edge of the rivet holes, and connected by connecting portions of Oite narrow the part of the circumferential direction, the punching plate is rotatable as a fulcrum the connecting portion insulation box body according to claim 1 Symbol mounting, characterized in that.

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