JPS6157548B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat insulating box body that combines separate front plates, top plates, left and right side plates, bottom plates, and inner boxes and integrates them into one body by injecting and foaming foam insulation material. The aim is to provide a heat insulating box that is easy to assemble and has good productivity by eliminating fixing points such as spot welding and screw fixing.

In conventional insulation boxes, after an outer box is formed by spot welding or screwing, an inner box is fitted into the outer box and foamed insulation is injected and foamed, or a front plate, a bottom plate, and a back plate are formed. After assembling the approximately U-shaped assembly made of the plate and the top plate integrally into the inner box, the front flanges of both sides of the plate are engaged with the front flanges of the inner box from both sides, and at the same time, the engaging corners are The heat-melting material is heated and melted and poured to temporarily fix and seal the engaging corners of the outer box and inner box.Then, the back flanges of both side plates are engaged with the back plate and bottom plate from both sides, and the side plates are removed. There is a case in which the structure of the box is maintained by screwing it in place to prevent it from opening, but in the former case, after assembling the outer box, it is necessary to fit the inner box into the outer box, which is a laborious process. In addition to being large in number, it is very difficult to fit the inner box, and in the latter case, it is difficult to handle the assembled parts of the front plate, bottom plate, back plate, and top plate. , When melting and pouring heat-melting material into the engaging corner of the front flange of the inner box and the front flanges of both side plates, the bottom plate and back plate get in the way, reducing work efficiency and making temporary fixation uncertain. There was a drawback that. or,
In such conventional products, the dew prevention pipe installed inside the periphery of the box does not come into close contact with the inner surface of the box,
When the refrigerator is a finished product, the vibrations of the compressor may be transmitted to the pipes mentioned above, causing a beeping sound.
There was a drawback that heat conduction to the side plate of the pipe was uneven.

The present invention has been devised to eliminate the above-mentioned drawbacks, and one embodiment shown in the drawings will be described in detail below.

Reference numeral 1 designates an inner box in which a freezer compartment 2 and a refrigerator compartment 3 are integrally molded from a synthetic resin material, and a flange 5 having a rib 4 at the tip is formed on the outer peripheral edge of the front opening. Reference numerals 6, 6 include U-shaped grooves 7, 7 on the front edge that engage with the flange 5 of the inner box 1, and U-shaped grooves 8 on the rear edge that are substantially perpendicular to the U-shaped grooves 7, 7.
The side plate 8 has bent pieces 9, 9, 10, 10 bent inward at its upper and lower ends.
have. 11 is a top plate having a U-shaped groove 12 on its front edge that engages with the flange 5 of the inner box 1 and a U-shaped groove 13 on its rear edge that is approximately orthogonal to the U-shaped groove 12; Both side edges are integrally formed with flanges 14, 14 which are one step lower than the upper surface and abut against the lower surfaces of the bent pieces 9, 9 of the side plates 6, 6. Reference numeral 15 denotes a substantially gate-shaped front plate, and a U-shaped groove 16 is formed at its upper edge to engage with the lower part of the flange 5 of the inner box 1. Reference numerals 17, 17 are bottom angles attached to the lower portions of the side plates 6, 6, and constitute the legs of the heat insulating box of the present invention. 18, 18 are the bottom angles 17, 17 above.
This is a guide rail formed in a shape to which a substantially shaped bottom plate 19 is detachably attached. Reference numerals 20 and 20 are ribs that abut on the inclined portion of the bottom plate 19, and 21 is a flange formed on the front edge of the bottom plate 19. This flange 21 is adapted to come into contact with the inner surface of the front plate 15 when the bottom plate 19 is attached to the guide rails 18, 18 of the bottom angles 17, 17. Reference numeral 22 designates the back plate of the outer box 23 consisting of the side plates 6, 6, the top plate 11, etc., and a bent piece 25 having an appropriate number of protrusions 24, 24, . . . formed on its outer peripheral edge.
have. This bent piece 25 is formed in the U-shaped grooves 8, 8 formed at the rear edges of the side plates 6, 6 and the top plate 11.
and 13, and the protrusions 24, 24...
The bent piece 25 can be easily inserted into the U-shaped grooves 8, 8 and 13.
This is to prevent them from leaving. 2
6 is a dew prevention pipe (condensation pipe) disposed around the outer circumference of the flange 5 of the inner box 1 and inserted and fixed together with the flange 5 into the U-shaped grooves 7, 7 and 12 of the side plates 6, 6 and the top plate 11. ), and is bent into a gate shape as shown in Figure 5. This pipe 26 has a ceiling side 29 curved upward, side sides 30, 30 on both sides, and lower sides 31, 31 bent at almost right angles to the side sides 30.
from the length a of the ceiling side 29 to the lower side 31,3
The length b between 1 and 1 is formed to be longer. 2
7, 27... are the flange 5 of the inner box 1 and the side plates 6, 6.
A heat-melting material is heated and melted and poured into the engaging corners of the top plate 11 and the front plate 15, and serves to temporarily fix and seal the parts, respectively. 28 is inner box 1
The foam insulation material filled in the space formed by the outer box 23 and the outer box 23 is shown.

Here, the assembly operation of the heat insulating box of the present invention will be explained. First, the inner box 1 is installed on an assembly jig stand with the front opening facing downward, and the dew prevention pipe 26 is surrounded around the outer periphery of the flange 5. Then, while inserting the ceiling side 29 of the dew prevention pipe 26 into the U-shaped groove 12 formed on the front edge of the top plate 11, the ceiling side of the flange 5 of the inner box 1 is engaged. While inserting both sides 30, 30 of the dew prevention pipe 26 into the U-shaped groove 16 of the front plate 15 and the U-shaped grooves 7, 7 of the side plates 6, 6, insert the lower side and both sides of the flange 5 of the inner box 1. engage. Since the ceiling side 29 of the pipe 26 is slightly curved, when inserted into the U-shaped groove 12 of the top plate 11, the pipe 26 elastically inscribes in the groove 12 due to its own elasticity and becomes stable. Also, both sides 3 of the pipe 26
0 and 30 are spaced wider toward the bottom, so when they are inserted into the U-shaped grooves 7 and 7 of the side plates 6 and 6, they are elastically inserted into the grooves 7 and 7 by their own return force. Stable in contact. Therefore, in this state or at the bottom of both side plates 6, 6, there is a bottom angle 1.
7 and 17 are attached to the flange 5 of the inner box 1.
The heat-melting material 27, 27, etc. is heated and melted and poured into the engaging corners of the top plate 11, front plate 15, and side plates 6, 6, temporarily fixing and sealing the engaging corners, and bending the pipe 26. The parts 32, 32... are fixed. After that, both sides of the bottom plate 19 are inserted and fixed into the rails 18, 18 formed on the bottom angles 17, 17, and the U-shaped grooves 13 and 8 formed on the back edges of the top plate 11 and the side plates 6, 6 are inserted. 8 with the bent piece 25 of the back plate 22. The engagement of the back plate 22 at this time prevents the top plate 11 and the upper ends of the side plates 6, 6 from expanding outward, and the protrusions 24, 24 are connected to the bent pieces 25.
This acts to prevent the U-shaped grooves 13 and 8 from easily separating from the U-shaped grooves 13 and 8. In this way, inner box 1
The foamed heat insulating material 28 may be injected and foamed into the space between the inner box 1 and the outer box 23, and during the assembly process of the inner box 1 and the outer box 23,
5. Workability is greatly improved since the bottom plate 19 and the back plate 22 do not come apart. In addition, the foamed heat insulating material 28 leaks into the U-shaped groove 7, for example, as shown in FIG.
6 can be fixed more securely.

Since the insulating box of the present invention has the above-mentioned configuration, the dew prevention pipe can be inscribed and fixed in a predetermined position at the same time when constructing a double box based on the inner box 1, Improves work efficiency. Furthermore, since the dew-preventing pipe is inscribed and fixed in the double box body, there is no unevenness in heat conduction to the side plate, and the pipe itself does not vibrate and make noise.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of the inventive heat insulating box seen from the back side, Fig. 2 is a sectional view taken along line A-A' in Fig. 1, and Fig.
The figure is an explanatory diagram of the assembled state of the heat insulating box of the present invention, No. 4.
The figure is an explanatory view of the attachment state of the bottom plate and the back plate of the same insulating box as above, and FIG. 5 is a perspective view of the dew prevention pipe. 1: Inner box, 5: Flange, 6, 6: Side plate, 1
1: Top plate, 15: Front plate, 7, 7, 12, 16: U-shaped groove, 8, 8, 13: U-shaped groove, 17, 1
7: Bottom angle, 18, 18: Rail part, 1
9: Bottom plate, 22: Back plate, 25: Bent piece, 26: Dew prevention pipe.

Claims (1)

[Scope of Claims] 1. An insulating box that combines a separate front plate, top plate, left and right side plates, bottom plate, back plate, and inner box, and integrates them by injecting and foaming a foam insulation material to the outside of the inner box. A substantially U-shaped groove is formed on the front edge of the top plate and the left and right side plates, and a U-shaped groove is formed on the rear edge of the top plate and the U-shaped groove is substantially perpendicular to the U-shaped groove. The U-shaped grooves of the plate and the left and right side plates are engaged with the inner box flange, and a heat-melting material is heated and melted at the engaging corners of these engaging parts to form the engaging corners of the outer box and the inner box. At the same time, temporarily fix and seal the bottom plate, insert the bottom plate into the bottom angle rail attached to the bottom of both side plates, and then insert the bent piece formed on the outer periphery of the back plate to the back of the top plate and the left and right side plates. In a device that engages in a U-shaped groove formed at the edge, a dew prevention pipe bent into a portal shape is inserted into the U-shaped groove of the top plate and left and right side plates to form the U-shaped groove. When the engaging corner of the outer box and the inner box is temporarily fixed and sealed by the heat-fusible material that is elastically inscribed in the groove, the heat-fusible material causes the dew condensation prevention pipe to form the U-shape. A heat insulating box body characterized by being fixed to the inner surface of the groove.