JPH0313180B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of the Invention The present invention relates to a method for manufacturing a multilayer transparent plate that seals an insulating gas with a higher specific gravity than air in a space, and is mainly used for windows and the like of refrigeration equipment such as refrigerators and low-temperature show cases. The present invention relates to a method of manufacturing a multilayer transparent plate used for doors.

(B) Background The applicant of the present invention previously filed a patent application No. 57-20481 for a method for manufacturing a multilayer transparent plate. Embodiments of the background art will be described below with reference to FIGS. 1 to 8. Reference numeral 1 shown in FIGS. It is a multi-layer transparent plate used for windows and doors, and is interposed between two rectangular transparent plates 2A and 2B made of glass and the peripheral end faces of the opposing surfaces of both transparent plates,
Four spacers 4A, 4B, 4 connected in a frame shape
A space 5 is formed in which a heat insulating gas G such as Ar or SF ₆ , which has a higher specific gravity than air, is filled inside the space surrounded by both the transparent plates and the frame member. ing. 6A and 6B are adhesives such as double-sided adhesive tapes for mutually bonding both the transparent plates 2A and 2B and the frame member 3; 7 is an annular shape formed by the peripheral end surfaces of both the transparent plates and the outer surface of the frame member; A sealing member made of a resin such as thiocol is filled in the groove and adhered to each surface to keep the space airtight. Numeral 8 is a granular desiccant filled in a large amount in each of the spacers, and is made of a mixture of, for example, quick-drying silica gel that absorbs moisture quickly and morikiura sieves that dry slowly and has slow moisture absorption.

Each of the spacers is formed into a rectangular cylindrical shape having a hollow part 9 as shown in FIG. 3 by extrusion molding of aluminum or the like or by bending a thin metal plate. A ventilation path 10 consisting of an elongated groove communicating between each hollow portion 9 and the space 5 is formed respectively, and a spacer 4 is formed.
Circular openings 11A and 11B are formed on both the inner and outer surfaces of A, which correspond to through holes of a connecting tool to be described later. 12A, 12B, 12C, and 12D are corner connectors made of synthetic resin and have two legs 12l and 12m that intersect at approximately right angles. One leg 12 is attached to one of the hollow parts 9 that are adjacent to each other and intersect at right angles.
1. The frame member 3 is assembled by connecting the spacers to each other by inserting the other leg 12m into the other leg. As shown in FIGS. 4 and 5, the legs are formed in a shape capable of imparting elasticity such as a wave shape that is pressed and deformed within the hollow portion 9 when the spacers 4A and 4B are connected. 13A, 13B are two connectors 1
One leg of 2A, 12B, that is, the leg 12m, 12 inserted from both left and right into the hollow part 9 of the same spacer 4A.
Both openings 1 of the spacer 4A are through holes formed in 1.
1A, 11B, and connecting fittings 12A, 12
When the legs 12m and 12l of B are inserted into the spacer 4A and stacked on both ends of this spacer, both openings 11A,
Together with 11B, it connects the inside and outside of the spacer 4A.

Next, a method for manufacturing the multilayer transparent plate 1 will be explained. First, the spacers 4A, 4C are connected using the connecting tool 12A.
After connecting the spacers 4B and 4D in an L-shape using the connector 12C, desiccant 8 is filled into the hollow part 9 of each spacer, and then the spacers 4A and 4B and the connector 12D are connected using the connector 12C. spacer 4C, 4
Connect D to assemble the frame member 3, and connect both openings 11A, 11B of the spacer 4A and the connector 12A,
The through holes 13A and 13B of 12B are aligned to form two passages. At this time, each connector is connected to the hollow part 9
It serves as a stopper to prevent the desiccant 8 from leaking. After assembling the frame member, each spacer 4A,
Adhesives 6A, 6B are adhered to opposite surfaces of 4B, 4C, and 4D other than the inner and outer surfaces, and then this adhesive is adhered to the peripheral end surfaces of opposite surfaces of both transparent plates 2A, 2B to form a frame member. 3 and both transparent plates 2A and 2B are connected to each other, and a space 5 is formed to obtain a semi-finished product. After the space 5 is formed, the semi-finished product is erected with the spacer 4A at the top, as shown in FIG. 7, and fixed with a suitable jig. Thereafter, as shown in FIGS. 7 and 8, a supply nozzle 14 made of a long and thin pipe connected to a gas supply machine (not shown) is inserted into the space 5 through one passage consisting of an opening 11B and a through hole 13B. The exhaust nozzle 15 is inserted into the space 5 so that its tip is located at the lower part of the space 5, and the exhaust nozzle 15, which is a long and thin tube that guides the air in the space 5 to the outside, is inserted into the space 5 through the other passage consisting of the opening 11A and the through hole 13A.
Insert it into the space 5 and position its tip above the space 5, and gradually supply an insulating gas G such as Ar or SF ₆ , which has a higher specific gravity than air, into the space 5 from the supply nozzle 14 as shown by the arrow. As the insulating gas is supplied, the air in the space 5 is pushed upward and exhausted from the exhaust nozzle 15 as shown by the arrow, and a device (not shown) detects whether the space 5 is sufficiently filled with the insulating gas G. The supply of the insulating gas G is stopped, and both the supply and exhaust nozzles 14 and 15 are pulled out from the space 5. Next, the seal member 7 is arranged in an annular manner along the outer surface of the frame member 3 to close both openings 11A, 11B, and the seal member 7 is attached to each spacer, each connector 12A, 12B, 12C, 12D, and the like. A desired multilayer transparent plate 1 can be obtained by bonding the transparent plates 2A and 2B to maintain airtightness between the space 5 and the outside.

(c) Problems with the background technology The manufacturing method according to the background technology consists of two passages that serve as insulating gas supply passages or air discharge passages using a through hole of a corner connector and both openings formed on both the inside and outside surfaces of the spacer. Therefore, in addition to drilling the through-hole, it is necessary to drill both openings, which increases the number of work steps before assembling the frame member, and requires the insertion of the supply nozzle and exhaust nozzle if the through-hole and both openings must be aligned during assembly. This has resulted in the disadvantage that it takes time to correct the problem.

(d) Purpose of the invention The present invention reduces the number of work steps before assembling frame members,
Another object of the present invention is to provide an inexpensive multilayer transparent plate that allows quick assembly of frame members, improves assembly strength, and improves assembly strength.

(e) Summary of the invention At least one frame member comprising a cylindrical spacer and a corner connector having two legs inserted into the hollow part of the spacer, and at least two transparent plates. In the transparent plate that connects the two corner connectors to each other to form a space filled with an insulating gas having a specific gravity higher than that of air, a base portion that does not overlap with the spacer between the legs of the two corner connectors and a passageway in this base portion are formed respectively. , one of these passages is an insulated gas supply path,
A method of manufacturing a multilayer transparent plate using the other side as an air discharge path.

(f) Embodiments of the invention FIGS. 9 to 14 show embodiments of the invention.
In addition, in FIGS. 9 to 14, FIGS. 1 to 8
The same symbols as in the figure are the same.

12n is a base formed between both legs 12l, 12m of corner connectors 12A, 12B, 12i, 1
Reference numeral 2J denotes a contact surface formed by degrading the boundary between the base and both legs, and the corner connectors 12A, 12
The legs 12l and 12m of B are adjacent to each other with a spacer 4A,
When inserted into the hollow part 9 of 4B, 4C, one end surface of the spacers 4A, 4B, 4C is in contact with the contact surfaces 12i, 12.
J, and the base 12n and the spacers 4A, 4B, 4C are flush with both inner and outer surfaces and both sides, and the base 12n is in contact with the spacers 4A, 4C.
It does not overlap with B and 4C. Reference numerals 12h and 12h are passages formed in a part of the base to communicate the space 5 with the outside. In addition, other corner connectors 12
C, 12D also have a base 12n and abutment surface 12i, 1.
2J is formed.

Next, a method for manufacturing the multilayer transparent plate 1 will be explained.

Each corner connector 12A, 12B, 12C, 1
After assembling the frame member 3 by interconnecting the spacers 4A, 4B, 4C, and 4D with 2D, an adhesive 6 made of double-sided adhesive tape is applied to the entire circumference of both sides of the frame member.
A and 6B are pasted, and then, as shown in FIG. 10, the transparent plate is attached to an assembly jig 16 consisting of a rectangular substrate 17 and eight guides 18A to 18H erected on the outer peripheral surface of this substrate. 2A, frame member 3, and transparent plate 2B, press the transparent plate 2B to separate both transparent plates 2.
A, 2B and the frame member 3 are interconnected with adhesives 6A, 6B to form a space 5. Next, an annular groove formed by the inner circumferential end surface of the transparent plate and the outer surface of the frame member except for the vicinity of the passages 12h and 12h of the frame member 3 is filled with a resin sealing member 7 such as thiocol. Passage 12 by gluing it to each side.
A semi-finished product is obtained in which the space 5 is kept airtight except around h and 12h. Next, as shown in FIG. 11, a plurality of semi-finished products are erected on the pedestal 19 so that the corner connectors 12A and 12B are located on the upper part of the frame member 3, and the supply nozzle 14 of the gas supply machine 20 is connected to the corner. The supply nozzle is passed through the passage 12h of the tool 12A, and the tip of the supply nozzle is positioned below the space 5 as shown in FIG. The gas supply device includes supply nozzles 14A to 14J made of flexible thin tubes, and electromagnetic valves 21A to 21J provided in the middle of each of the supply nozzles.
An on-off valve 2 formed by connecting the bases of each of the supply nozzles.
2A to 22J, a distribution tank 23 to which each of the on-off valves is attached, a first operation switch 25 that drives a first timer 24 that operates for the first gas supply time, for example, 15 minutes, and a first reset switch that resets the timer 24. 26. A second operation switch 28 that drives a second timer 27 that is driven for a second gas supply time, for example, 30 minutes, and a second reset switch 29 that resets the second timer 27, and a second reset switch 29 that stops driving the first timer after, for example, 10 minutes. First select switch 30A-3
0E, a control box 33 equipped with second select switches 31A to 31E that stop the driving of the second timer, for example, after 20 minutes, and a pressure gauge 32 that displays the gas pressure adjusted by a fine adjustment regulator (not shown); The insulating gas G sent through a hose 38 from a cylinder 37 equipped with a regulator 34 and pressure gauges 35, 36 is supplied to each space 5 for a predetermined time through supply nozzles 14A, 14C, 14E, 14G, 14I. do. In this case, the on-off valves 22B, 22D, 22F, 22H, 2
2J is closed. As the insulating gas G, which has a higher specific gravity than air, is injected, the air in the space 5 is gradually pushed upward and is discharged to the outside from the passage 12h of the corner connector 12B as shown by the arrow in FIG. After filling the insulating gas G, as shown in FIG. 14, the passages 12h, 12h are closed with cap-shaped sealing members 7', 7' of the same quality as the sealing members, thereby sealing the space 5 with the desired insulating gas G. The multilayer transparent plate 1 is completed.

According to such a manufacturing method, the spacers 4A, 4B,
At the base 12h that does not overlap with 4C, there is a passage 12 with one side serving as an insulating gas supply route and the other serving as an air discharge route.
Corner connector 12A, 1 forming h, 12h
2B to assemble the frame member 3, the passages 12h, 12h that perform the above-mentioned functions can be placed in the predetermined positions by simply inserting the legs 12l, 12m of the corner connectors 12A, 12B into the spacers 4A, 4B, 4C. At the same time, the assembly of the frame member 3 can be completed,
The assembly work of the frame member 3 can be speeded up, and the drawbacks of the background art can be solved at once. Also, the base 1
2n acts as a part of the spacer, so
When assembling the frame member 3, the spacers 4A, 4B, 4
C and 4D do not come into contact with each other and are butted, and wobbling due to this butting can be prevented and the assembly strength can be improved.

(G) Other embodiments of the present invention FIGS. 15 and 16 show three transparent plates 2A, 2
This is an embodiment showing a semi-completed state of a three-layer transparent plate 1' in which two spaces 5A and 5B are formed by B and 2C and two frame members 3A and 3B.

(h) Application of the finished product according to the present invention FIG. 17 shows a metal frame 39 with a handle 39A fitted to the peripheral edge of the multilayer transparent plate 1 manufactured according to the present invention to form a door 40, a passage 12h, This shows an application in which the door is provided at the front of the refrigerator 41 so that 12h is located at the top.

(l) Effects of the present invention The assembly work of frame members can be done quickly and easily, and
The assembly strength of frame members can be improved.

[Brief explanation of the drawing]

1 to 8 show examples of background technology,
Fig. 1 is a perspective view of a multilayer transparent plate manufactured according to the background art, Fig. 2 is a cross-sectional view taken along line A-A' in Fig. 1, Fig. 3 is an exploded perspective view of the frame member, and Fig. 4 is the same as Fig. 1. B-
B' sectional view, Fig. 5 is a sectional view taken along line C-C' in Fig. 4, Fig. 6 is a plan view of the main part, Fig. 7 is a perspective view showing the insulating gas injection process, and Fig. 8 is Fig. 7 D. -D′ cross-sectional view, No. 9
14 show embodiments of the present invention, FIG. 9 is a perspective view of a corner connector used in the present invention, and FIG.
Fig. 0 is an exploded perspective view showing the process of connecting the transparent plate and the frame member, Fig. 11 is a perspective view showing the process of injecting insulating gas, Fig. 12 is a perspective view of the multilayer transparent plate in the state of injecting insulating gas, FIG. 13 is a sectional view taken along the line E-E' in FIG. 16 is a sectional view taken along line F-F' in FIG. 15, and FIG. 17 is a perspective view of a refrigerator using the multi-layer transparent plate manufactured according to the present invention as a door body. 2A, 2B...Transparent plate, 3...Frame member, 4A...Spacer, 5...Space, 6A, 6B...Adhesive, 7, 7'...
Seal member, 9... Hollow part, 12A, 12B... Corner connector, 12l, 12m... Leg, 12n... Base, 12h, 12h... Passage, 14... Supply nozzle,
G...Insulating gas.

Claims (1)

[Claims] 1 At least one frame member assembled from a cylindrical spacer whose hollow part is filled with a large amount of desiccant and a corner connector equipped with two legs inserted into the hollow part of the spacer, At least one transparent plate is bonded to the peripheral edges of opposing surfaces of at least two opposing transparent plates via adhesive to connect both transparent plates and the frame member to form at least one space inside. ,
In a multi-layer transparent plate in which this space is filled with an insulating gas having a higher specific gravity than air, the two corner connectors have a base that is not inserted into the hollow part of the spacer between the legs, and a base that is not inserted into the hollow part of the spacer between the legs, and a base that is not inserted into the hollow part of the spacer between the legs. Passages communicating between the space and the outside are formed, at least one of the passages is disposed above the frame member, and an insulating gas supply nozzle is passed into the space from the other passage to supply insulating gas to the space. . A method for manufacturing a multilayer transparent plate, comprising discharging air in the space to the outside from the one passage located at the upper part.