JPH0718642B2 - Insulation box manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to an insulating box body represented by a low temperature showcase in which a transparent window is provided on one wall of a storage room surrounded by an insulating material. It relates to a manufacturing method.

2. Description of the Related Art Various methods such as those disclosed in JP-A-60-165487 have been proposed as methods for manufacturing a heat insulating box body such as a low temperature showcase having an opening and a protruding wall formed on one side surface. In this publication, when the height of the nest is made smaller than the distance between the protruding wall and the wall facing the protruding wall, formation of a gap between the nest and the wall is avoided. There is disclosed a method in which the undiluted solution of the foamed heat insulating material is filled in both the inner and outer boxes.

Problems to be Solved by the Invention A low-temperature showcase is configured in a state in which a transparent window is arranged on an upper portion of one wall of a heat insulating box manufactured by the manufacturing method in the above-mentioned publication. The space formed by both boxes and the breaker for connecting both boxes is filled with the foamed heat insulating material and then fitted into the groove formed in the breaker. Therefore, the foaming pressure generated during foaming and solidification of the filled heat insulating material pushes the grooved surface of the breaker outward, resulting in more foaming than the shape of the breaker window before foaming. The shape of is such that the entrance side of the window is narrowed. Therefore, it is not possible to fit the see-through window through this narrowed entrance, and therefore, a step of correcting the groove portion of the breaker is required before this fitting,
The work was very troublesome. In addition, when the shape after foam filling is greatly deformed, even the repair work cannot fix the see-through window.

Therefore, it is an object of the present invention to provide a method for manufacturing a heat insulating box that does not cause the above-described correction work and difficulty of fixing when fixing the transparent window.

[Structure of Invention]

Means for Solving the Problems The present invention has a transparent plate, a recess formed in one wall of both the inner and outer boxes, and a frame body having a groove portion corresponding to the recess and into which the transparent plate is inserted. Then, in a state in which the frame body having the transparent plate inserted therein is arranged so as to straddle both the inner and outer boxes, a foamed heat insulating material is filled between the inner and outer boxes to form a heat insulating box body. The present invention provides a method for manufacturing the heat insulating box.

Work Since the transparent plate is placed in the recess prior to filling the foam insulation, even if the groove is (outwardly) pressed by the foaming pressure generated when the heat insulation solidifies, the transparent plate is deformed by the pressing. It acts as a reinforcing member that holds back the transparent plate, and the pressure on the transparent plate increases the degree of adhesion and fixing between the groove portion and the transparent plate, thus improving the mounting strength of the transparent plate.

Embodiments Embodiments of the present invention will be described below with reference to FIGS. 1 to 10.

(1) is a heat insulation box typified by a low-temperature showcase used for displaying and selling ice cream, sorbet, etc., and a transparent window having a heater (2B) for preventing dew condensation on the upper edge of the front face. (2) is a pair of left and right transparent doors (3) and (3) that slide in the front and rear directions to close the opening in the first half of the upper surface, and the transparent doors (3) and (3) are opened in the second half of the upper surface. Door storage part (4) for sometimes storing the door (3) (3)
And a machine room (6) in which mechanical components necessary for cooling are arranged below the heat-insulating box body (5). Insulation box body (5)
Is an opening made of a metal such as a hot-dip galvanized steel plate with an open top to define a storage chamber. The inner box is housed with an appropriate space between the inner box (11) and the upper box. Outer box (12) made of metal such as hot-dip galvanized steel, and both boxes (11)
In the space of the box (1A), which is composed of the resin frame (13) that covers the upper opening of the space surrounded by the two boxes and spans the upper end of (12) It is configured by foaming and filling a foam insulation material (14). Then, the opening (15) for taking in and out the product is formed on one wall surface (the upper surface in this example).
And a projecting wall (16) extending in the direction of the opening (15). The transparent window (2) is made of a multi-layer transparent plate having a heat insulating effect. In this example, two transparent glasses (2A) are held by spacers at appropriate intervals, and the two glasses are closely attached to the spacer. In order to improve the property, both are fixed by a sealing material having adhesiveness such as thiocol, and a dew condensation preventing heater (2B) is arranged on the outer periphery of the sealing material.

The inner box (11) has front, back, left, right, and bottom walls (11A).
(11D), and a meandering low-temperature refrigerant pipe provided on the outer peripheral surface of the pipe-on-sheet type main cooler (1
7) and a plate-shaped auxiliary cooler (18) that is arranged in the latter half of the upper surface and is formed by the so-called roll bond method and has rising pieces on the front, back, left, and right peripheral edges (18). 19) Cool. In addition, the outer box (12) has a heat exchanger (20) as a heating element composed of a meandering refrigerant pipe in which a high-temperature gas-liquid mixed refrigerant or a liquid refrigerant flows in the refrigeration cycle, which is attached to the inner surface with aluminum tape. The wall (12A), the back wall (12B) having a bent side and a forward groove defined by the bent side at the upper end extending above the front wall (12A), and both left and right walls (12
C), and a foam insulation (1
4) Bottom wall (1) with injection holes and appropriate number of exhaust holes at the front edge
2D) and an upper wall (12E) that has front, back, left, and right rising pieces on the periphery and is located directly above the auxiliary cooler (18) and gently inclines backward and downward. In the heat exchanger (20) the front wall (1
2A) to prevent condensation. Even if an electric heater is arranged as the heating element instead of the heat exchanger (20), the same dew condensation preventing effect can be obtained.

The machine room (6) has a lower part of the front wall (12A) of the outer box (12), a lower part of both left and right walls (12C), a bottom wall (12D), and a first exhaust passage opening vertically at an upper edge. (21) and a second exhaust passage (22) located below the first exhaust passage (21) and opening in the front-rear direction are formed, and an opening for taking out mechanical parts is provided on the back surface of the heat insulating box body (5). Removable cover to cover (23)
And a base (25) which is located at the rear of the lower surface and forms an intake passage (24) between the lower end of the front wall (12A) of the outer box (12) and the main / auxiliary cooler (17) ( 18) and the refrigerant compressor (26) that constitutes the refrigeration cycle on the base (25),
The wire fin tube condenser (27) is connected to the intake passage (24)
Are fastened to a pair of support tools provided at the front and rear edges of the.

Further, the door storage section (4) includes a resin shade plate (30) located on the front surface and a metal ceiling wall (31) located on the upper surface.
And the upper wall (12E) of the outer box (12) located on the lower surface, which illuminates the inside and outside of the cabinet, such as a straight tube fluorescent lamp (3
It is equipped with 2) and stores this door when the transparent door (3) (3) is opened.

In the frame body (13) arranged over the upper ends of the inner and outer boxes, the transparent window (2) is held and fixed in the recess (8) formed in the front wall of the inner and outer boxes. In order to make the left and right parts of the transparent window formed into a circular shape look like a circular arc, in this example, the first frame (13A) configured to divide the frame into three sections and combine them together, and the projecting wall (16 ) And a second frame body (13B) arranged at the front end of Further, the first frame body (13A) has a left frame portion (40) and a right frame portion (not shown) that correspond to the left and right walls of the box body, and a front frame portion (41) that corresponds to the front wall of the box body. Since the left and right frame portions are divided and are symmetrically arranged such that they face each other, the left frame portion (40) and the front frame portion (41) will be briefly described. The recess (8) is formed by surrounding the end of the front frame part (41) and the connecting part (47), and the front frame part (41) has a cross section as shown in FIG. An insertion piece (43) that forms a groove (42) as a groove for inserting and holding the lower end of the transparent window and extends downward and inserts the upper end of the front wall of the inner box, is connected and connected to the left and right frame parts, and is connected to the outer box. An upper end of the front wall is inserted to form a fixed piece (44) having a function as a core frame of the transparent window (2). The left frame part (40) is formed on the lower part of the inclined part (45) which is formed with an upward inclination toward the rear and the dew formed on the front part of the inclined part (45) and which is transmitted through the inclined part. The dew receiving portion (46) having an opening and the dew receiving portion (46) are partitioned from each other, and the connecting portion (47) is formed so as to project from the inclined portion so as to connect with the front frame portion (41).
It has and. A fixing groove (48) which communicates with the concave groove (42) and which inserts and holds the left end of the transparent window (2) into this connecting portion, and a connecting portion which is also inserted under the fixing piece (44) of the front frame portion (41). A decorative piece (50) having a piece (49) at its tip and flush with the fixed piece (44) and acting as a window frame is provided. A plurality of ribs (51) for preventing rattling before and after the transparent window are formed on the front surface of the back wall of the fixing groove (48). Further, the inclined portion (45) has a rail receiver (52) for holding the left rail (60) formed on the inner side of the upper surface, and for energizing electric parts such as a transparent window heater and a fluorescent lamp on the outer side of the upper surface. The wiring part (53) for processing the wiring is formed, and the insertion piece (54) for inserting the upper end of the inner box is formed inside the lower surface. The rail receiver (52) is a stopper (6) formed on one end of the left rail (60).
1) A locking piece (55) for locking the left rail, a receiving piece (56) for receiving the lower surface of the left rail, and a standing piece (hanging piece) for hanging a hooking piece (62) formed on the other end side of the rail (60). 57) and are provided.

Further, on the left rail (60), there is a mounting portion (63) on which the transparent door (3) is slidably mounted and a regulating portion (64) which regulates lateral displacement of the door.
And are provided.

(70) inserts and holds the upper end of the transparent window (2) to fix the transparent window (2), and a handrail (80) described later.
It is a window fixing frame made of resin and covered with the above, and is arranged corresponding to the front wall of the box body. The window fixing frame (70) includes a receiving portion (71) that receives the lower surface of the R portion (83) of the handrail (80),
The locking claws (8) formed on one end of the receiving part (71)
The engaging groove (72) for fitting the 6), the flexible hanging piece (73) standing on the lower surface of the receiving portion (71), and the hanging piece (7).
3) A window fixing groove (74) as a fixing portion which is provided at the tip of the transparent window (2) and has an opening narrower than the inside so as to have a duality for firmly fitting the upper end of the transparent window (2), The handrail (80) includes a support piece (75) for supporting the lower surface of the dew receptacle (85).

(80) is a front decorative frame (81) covering the window fixing frame (70),
It is a metal handrail with excellent corrosion resistance such as stainless steel that consists of left and right decorative frames (82) (82) that cover both left and right frame parts (40) and press and fix the left and right rails (60). The frame (81) has an R part (8
3), a door stopper (84) hanging from the rear end of the R portion, a dew receptacle (85), and a locking claw (86) formed at the front end of the R portion,
The left and right decorative frames (82) (82) are composed of a pressing piece (87) for pressing the left and right rails (60) at their inner ends, and a covering section (88) for covering the wiring section of the left and right frame sections.

Next, when fixing the transparent window (multi-layer transparent plate),
For both the inner and outer boxes (11) (12) arranged at appropriate intervals, the frame bodies (13) formed by connecting and connecting are held so as to be held between the inner and outer boxes. Place and fix it on the top of both the inner and outer boxes. The lower end of the transparent window (2) is in the concave groove (42) of the front frame part (41) of the frame body, and the left and right ends of the transparent window (2) are in the fixing grooves (48) of the left and right frame parts (40). Insert the transparent window from above so that it is retained. Thereafter, the lower end opening of the window fixing groove (74) of the window fixing frame (70) is widened against the restoring force, and the upper end of the transparent window (2) is fitted and held. Then, the left and right frame parts (4
The left and right rails (60) are suspended from the standing pieces (57) of the rail receiver (52) of (0), and the left and right decorative frames (8) of the handrail (80) are suspended.
2) With the pressing pieces (87) of (82), left and right rails (6
0) is pressed and fixed, and the locking claws (8) of the front decorative frame (81)
6) is fitted into the locking groove (72) of the window fixing frame (70), and the handrail (80) is fixed so as to cover the window fixing frame (70) and the left and right frame portions (60). With respect to both the inner and outer boxes assembled in this state, the space formed by the both boxes is filled with the foamed heat insulating material to form the heat insulating box body (1).

Here, the manufacture of the heat insulating box will be described with reference to FIGS. 1 and 9.

First, an inner box (11) in which a heat insulating block (90) is attached to the outer surface of the bottom wall (11D) with an adhesive and an outer box (12) are frame bodies (13).
Insulation block (90) and partition (9
1) is interposed, a gap is formed between the heat insulating block and the bottom wall (12D) of the outer box, and an opening (1
5) Assemble the box body (1B) with the protruding wall (16).

Then, a frame body (front frame portion) (41) having a groove (42) corresponding to the recess formed in the upper front wall of the box body (1B) is straddled over both the inner and outer boxes (11) and (12). Then, the transparent plate (2) is fitted into the concave groove (42) of the frame body (front frame portion) (41) to arrange the transparent plate in the concave portion. Thereafter, the box body (1B) is transferred to the heating furnace (92) and heated to a predetermined temperature. Next, after arranging the box body (1B) with the opening (15) and the projecting wall (16) as the upper surface, the nest (93) heated to a predetermined temperature is inserted into the inner box (11) through the opening (15). Then, after placing it on the front half of the bottom wall (11D), this nest is slid backward and placed immediately below the projecting wall (16) as shown in FIG. With the placement of the nest, the bottom wall (11D) of the inner box receives the weight of the nest (93) and bulges toward the space (P) side, while the heat insulation block (90) moves to the outer box. It hits the bottom wall (12D) and the gap disappears.

After placing the nest, put the nest in the inner box (11) and turn the box body (1B) upside down so that the opening (15) and the projecting wall (16) are on the lower surface. Both jigs (95)
Press the box (1B) at (96) as shown in Fig. 1. The weight of the nest (93) is added to the auxiliary cooler (18) which is the inner wall of the projecting wall (16) due to the reversal, whereby the bending of the bottom wall (11D) of the inner box is eliminated. At the same time, the heat insulating block (90) separates from the bottom wall (12D) of the outer box and has a gap (9
4) is formed again. In this state, by injecting the undiluted solution (Q) into the space (P) through the injection hole (97), the undiluted solution (Q) will grow and grow in the space (P) as shown by the arrow in FIG. Air is extruded from the exhaust hole (98) to form the foam insulation (14), and the above-mentioned insulation box (1)
Is obtained.

According to the present invention having the above-described configuration, the transparent window (for the frame body (13) including the front frame portion (41) and the left and right frame portions (40) arranged across the upper ends of the inner and outer boxes is 2) can be held and fixed only by inserting it into the concave groove (42) and the fixing groove (48) without using a fixing member such as a screw. Further, the window fixing frame (70) can be installed by fitting the upper end of the transparent window into the window fixing groove (74) of the window fixing frame (70). At this time, since the window fixing groove (74) firmly fits the upper end of the transparent window (2) by the restoring force, a fixing member such as a screw is unnecessary. Further, the left rail (60) and the right rail (60) are suspended from the left and right frame portions (40), respectively, and then the hand rail (80).
By covering the left and right rails (60) and the window fixing frame (70) with, the window fixing frame (70) and the left and right rails (60) can be fixed. In this case also, the handrail (80) is attached to the outer box. (12)
No fixing member such as a screw is required other than fixing to.
Therefore, the components around the transparent window (2) are fixed by a very easy method by fitting or locking, and the number of fixing members can be reduced as a whole. Further, since the heat insulating material is filled after fixing these parts, it is attempted to swell in the direction of narrowing the width of the recess or the direction of narrowing the upper surface opening by the foaming pressure accompanying the foaming and solidification of the heat insulating material. However, since the transparent window (2) in the recess and the handrail (80) in the upper surface opening respectively act as a reinforcing member to prevent this swelling, an insulating box body with a transparent window can be obtained at the same time when the foaming ends. The problem that the transparent window (2) and the handrail (80) cannot be attached can be solved.

〔The invention's effect〕

As described above in detail, according to the manufacturing method of the present invention, the width of the recess is formed in the frame body by the foaming pressure generated when the foamed heat insulating material filled in the space formed by the inner and outer boxes and the frame body is solidified. Since it is pushed in the direction of narrowing, the end face of the transparent plate is also pushed,
The mounting strength of the transparent plate is increased, and at the same time when the foaming is completed, a heat insulating box body with the transparent plate is obtained, and the problems that have been caused conventionally due to the mounting of the transparent plate can be solved.

[Brief description of drawings]

Each drawing shows one embodiment of the present invention, FIG. 1 is a sectional view of a box body fixed to a jig, FIG. 2 is an external perspective view of a heat insulation box body,
3 is a sectional view taken along the line AA of FIG. 2, FIG. 4 is an enlarged sectional view of a portion B of FIG. 3, and FIGS. 5 and 6 are exploded sectional views for explaining the fixing of the transparent window. FIG. 7 is a schematic perspective view showing a corner portion of the box body, and FIG. 8 is C- in FIG. 2 with a door removed.
C sectional view, FIG. 9 is a sectional view showing a state where a box body is installed in a heating furnace, and FIG. 10 is a schematic perspective view showing a state where a transparent window is fixed to a frame body. (1) …… Insulation box, (1B) …… Box, (2) …… Transparent window, (3) …… Transparent door, (13) …… Frame, (41) …… Front frame, (42) …… Concave groove, (60) …… Right and left rails, (7
0) Window fixing frame, (74) Window fixing groove, (80) Handrail, (93) Nesting, (95) (96) Jig, (97) Injection hole , (98) …… Exhaust hole.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuo Noda 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (56) Reference JP 62-245076 (JP, A) JP Sho 60 -155879 (JP, A) Actual public Sho 62-25668 (JP, Y2)

Claims (1)

[Claims] 1. A transparent plate, a recess formed in one wall of both the inner and outer boxes, and a frame having a groove corresponding to the recess and into which the transparent plate is inserted. Manufacture of a heat insulation box body in which the inserted frame body is arranged so as to straddle both the inner and outer boxes, and a foam insulation material is filled between the inner and outer boxes to form a heat insulation box body. Method.