JPH0635907B2 - Insulation box manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a method for manufacturing an insulating box having an inner box, an outer box, and a frame member that engages flange portions of both boxes.

2. Description of the Related Art In a heat-insulating box body such as a refrigerator, the inner box is inserted into the outer box until its flange portion abuts the flange portion of the outer box, and the flange portion of the inner box is deformed into the flange portion of the outer box. It was forced to overcome the problem and connected to the flange part of the outer box, but this connection requires a great deal of labor and skill, and defective products cause deterioration in overall quality. As shown in Japanese Patent Publication No. 55-26394, it is general that the flange portion of the inner box is bent and deformed under pressure to be assembled.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above publication, the flexible inner box is inserted through the opening of the outer box, and each side of the flange portion of the inner box is curved and deformed inward at the same time during the insertion to open the opening. Since it is made to pass through, the entire flange portion can be inserted and arranged in the outer box at once, and automatic assembly by a machine can be realized. However, in order to cause the curved deformation, the inner box must have flexibility, and when the inner box is made of steel, the curved deformation causes the box surface to be damaged and the metal box This manufacturing method cannot be applied to the case where the flange portion is engaged with the resin frame member.

Therefore, the present invention provides a method for manufacturing a heat-insulating box that can be easily manufactured even in a metal box when engaging the flange portions formed on the opening peripheral edges of both the inner and outer boxes with the frame member. It is an issue.

[Structure of Invention]

Means for Solving the Problems The present invention provides a method for manufacturing a heat insulating box for solving the above problems, which is composed of a horizontal frame of two upper and lower sides and a vertical frame of two left and right sides, each frame facing rearward. The inner edge of the inner box is locked to the inner locking groove of the front frame, which has the inner locking groove open to the inside and the outer locking groove open to the outside, and each has an inward flange. The outer flange of the outer box body, which has a top surface and both side surfaces and is widened toward the front, is locked in the outer locking groove of the upper horizontal frame of the front frame, and then The inward flange of the surface is press-fitted into the outer locking grooves of the left and right vertical frames of the front frame, and its front end is located on the outer locking groove of the lower horizontal frame of the front frame, and its front end is located on the rear surface of the outer box body. The rear ends of the units are fixed to the plates, the unit top plate is placed on the lower surface of the inner box with a space, and the foam insulation is filled between the inner and outer boxes. To fill.

Action The inner box can be locked to the front frame body only by inserting the outward flange at the opening edge of the inner box into the inner locking groove that is opened rearward and is composed of the four sides of the upper, lower, left and right sides. In addition, the outer box body, which has the top surface and both side surfaces and is widened toward the front end, is placed over the inner box in the previous state, and the inward flange of the top surface is placed outside the upper horizontal frame. The front frame of the outer box body is fixed by pressing the inward flanges into the outer locking grooves of the left and right vertical frames while applying force inwardly on both sides after locking the outer locking groove that opens in the direction It is locked to the body. Since the two frames are locked to the front frame without being deformed, there is no fear of the shape change and the restoration failure due to the deformation of both the inner and outer boxes, and the manufacture thereof becomes easy.

Embodiments Embodiments of the present invention will be described below with reference to FIGS.

(1) is an inner box (2) with a one-sided opening made of metal, an outer box (3), and a foaming heat insulating material (4) such as hard polyurethane filled between these boxes
A refrigerating showcase comprising a heat-insulating box body composed of a cooler (6) and a blower device (7) arranged in the upper part of the inside of the compartment formed by the inner surface of the inner box and the inner surface of a sliding door described later. Chamber (8)
The storage chamber (10) is divided into a plurality of upper and lower stages by a shelf member (9) such as a mesh shelf that is detachably arranged under the cooling chamber. In addition, a transparent sliding door (11) and upper and lower rails (12) (13) facing each other which guide the door are arranged in the front opening, and the lighting room (14) is provided above the upper rail (12). A machine room (17) for arranging the compressor (15), the condenser (16) and the like is arranged below the storage room (10).

Reference numeral (20) is a front frame body made of hard resin corresponding to the front opening, and has a rectangular ring shape with a surface in the depth direction with respect to the opening (in this example, two horizontal frames ( 20A) and two vertical frames (20B) are combined), the front frame body (20) is an inner locking groove that is opened rearward to insert and lock the outward flange (21) of the inner box at the inner end. (22), while inserting and locking the inward flange (23) of the outer box main body, which is arranged in front of the outward flange (21) of the inner box, at the outer end, the upper and lower horizontal frames (20
A) -An annular fastening body (for example, rubber band) that has elasticity when two left and right vertical frames (20B) are combined at their ends.
There is an outward locking groove (25) that opens to the outside (24) and the vertical slide rail (12) (1) is attached to the inner surface of the vertical frame (20B).
Three ribs (26) that prevent cold air from leaking from the side surface of the sliding door (11) that is slidable at 3) are formed in parallel. On the lower surface of the lower horizontal frame (20A), there is provided an angle (27) as a reinforcing member formed in an annular shape from a steel material having a U-shaped cross section for reinforcing the front surface of the machine room (17). The fastening body (24) is a foamed heat insulating material (4) which is pressed and filled by the flange (23) of the outer box.
It functions as a seal member that prevents the leakage of water.

On the other hand, the assembly of the inner and outer boxes (2) and (3) and the front frame body (20) will be described (see FIG. 1), the vertical frame (20B) and the horizontal frame (20B).
Opening frame is formed by (A) and the outer locking groove of each frame (20A) (20B)
Put a rubber band (24) on (25) and temporarily fix it as a frame,
Attach the outward flange (21) formed at the opening edge of (2) to each frame.
(20A) (20B) is locked in the inner locking groove (22). And, of the inward flange (23) formed at the end of the outer box body (3A) that is bent and formed in an isosceles trapezoidal shape without a bottom so that it has a top surface and both side surfaces and spreads toward the front. First, insert the flange of the top surface into the outer locking groove (25) of the upper horizontal frame (20A), and the flange (23) of the part that corresponds to the hypotenuse of the isosceles trapezoid, that is, the part that constitutes the outer box side, is the vertical frame (20B). The outer box body side surfaces are pressed inward toward each other so as to face the outer locking groove (25) of (1) to increase the bending angle of the bent portion. At this time, the annular angle (27) is positioned below the lower horizontal frame (20A), and together with the reinforcing and fixing members such as the L-shaped angle (28) arranged at the lower end of the side surface of the outer box body. Fix the lower surface of the annular angle (27) to the outer box. Then, while tilting the unit top plate (29) that forms the ceiling of the machine room from the back in this state, insert the tip of the unit top plate into the annular angle (27) to an appropriate position (see FIG. 6), Bent pieces pre-bent before insertion (30)
Back to the same plane as the other surface and make the bending piece (30) face the U-shaped part of the annular angle so that the unit top plate (29) is angled.
(27) Make sure that it does not come off. After this this unit top plate
Attach the flange (31) bent at the tip of (29) to the lower horizontal frame (2
(0A) Outer locking groove formed at the lower end and opened downward
Lock to (25). Then, the rear plate (33) of the outer box is installed, and the rear end of the unit top plate (29) is fixed to the rear plate (33).

Thereafter, the space between the inner and outer boxes and the space between the inner box and the unit top plate are filled with a foaming heat insulating material (4) such as hard polyurethane to form a heat insulating box. The bottom of the machine room (17) is
5), as long as mechanical parts such as the condenser (16) and the air blower can be installed, it is not necessary to form the entire lower surface as a single plate body, and it may be formed with several angles. Further, the rubber band (24) stopped in the outer locking groove (25) is pressed by the inward flange (23) of the outer box body (3A) and is deformed against the elastic force, so that the front frame (20) and Since it functions as a backing that increases the adhesion with the inward flange (23), it is possible to prevent foaming leakage of the heat insulating material (4).

(40) is a drainage pipe formed corresponding to the drainage port (42) formed in the drainage groove (41) of the lower horizontal frame (20A), and (43) is placed on the bottom of the inner box. A floor (45) having a holding bar (44) that is bent downward at the front and faces the inside of the drainage groove (41) to press and hold the upper surface of the lower rail described later is provided. There is. The lower rail (13) has inner and outer guide ribs (13B) (13C) and protrusions.
(13D) on its upper surface, inserted into the drainage groove (41) and holding bar (44)
An insertion rib (13E) is formed on the lower surface of the rail to prevent the rail from being lifted when it is pressed and held by, and is detachably mounted on the lower horizontal frame (20A). (46) is the cooling room
Connected to the outlet of the dew tray (8B) arranged below the cooler (6) in (8), hanging along the back of the inner box and extending forward between the bottom of the inner box and the bedding, and the tip. Is a flexible drainage pipe that hooks a hook on a hooking portion (47) formed on a leg portion (45) of a floor covering (43). Incidentally, when the tip of the drainage pipe (46) is hooked on the hook portion (47), the tip opening is surely directed downward. Particularly in this example, since the rear portion of the lower horizontal frame (20A) and the hook portion (47) are inclined upward, the drainage pipe (46)
Easy to tilt the tip of. Further, since the drainage pipe (46) is not buried in the heat insulating material layer, the drainage pipe (46) can be easily attached and detached, and the storage room (10) and the cooling room (8) can be easily cleaned and maintained.

〔The invention's effect〕

As described above in detail, according to the present invention, with the inner box being locked in the inner locking groove of the front frame, the outer box body having a wide end in front view covers the inner box top surface and both side surfaces from the wide side. The outer box body flange can be press-fitted into the outer locking groove of the front frame so that the inner and outer boxes can be installed without any deformation of the inner box. The work is very easy and there is no external damage due to deformation of the inner box.

[Brief description of drawings]

Each drawing shows one embodiment of the present invention, FIG. 1 is a perspective view for explaining the assembling of the outer box body to the front frame, FIG. 2 is an external perspective view of the refrigerating showcase, and FIG. Is a vertical sectional view of the showcase, FIGS. 4 and 5 are enlarged sectional views of parts A and B of FIG. 3, respectively, and FIGS. 6 and 7 are assembly of the unit top plate to an annular angle. FIG. 8 is an external perspective view for explaining the external appearance of the showcase, with the sliding door removed. (1) …… Showcase, (2) …… Inner box, (3) …… Outer box, (4)
…… Foam insulation, (20) …… Front frame, (20A) …… Horizontal frame,
(20B) …… Vertical frame, (21) …… Outward flange, (22) ……
Inner locking groove, (23) …… Inward flange, (25) …… Outer locking groove, (27) …… Angle (reinforcing member), (29) …… Unit top plate, (30) …… Fold Piece of music, (33) …… Rear plate.

Claims (1)

[Claims] 1. A front frame body comprising a horizontal frame having two upper and lower sides and a vertical frame having two right and left sides, each frame having an inner locking groove that opens rearward and an outer locking groove that opens outward. Of the outer box main body formed by locking the opening edge of the inner box with respect to the inner locking groove and having a top surface and both side surfaces each having an inward flange so as to widen toward the front. The inward flange of the top surface is locked in the outer locking groove of the upper horizontal frame of the front frame body, and the inward flanges of the both side surfaces are then locked in the outer locking grooves of the left and right vertical frames of the front frame body. It is press-fitted, and its front end is fixed to the outer locking groove of the lower horizontal frame of the front frame body, and its rear end is fixed to the rear plate located on the rear surface of the outer box body. A method for manufacturing an insulating box body in which a unit top plate is installed and a foam insulating material is filled between the inner and outer boxes.