JPH0319173B2 - - Google Patents

Description

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

(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 at both ends of 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, the supply nozzle 14, which is a long and thin pipe connected to a gas supply machine (not shown), is inserted into the opening 11B.
The exhaust nozzle 15 is inserted into the space 5 through one passage formed by the through hole 13B, and its tip is positioned 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 opening 11A. It is inserted into the space 5 through the other passage consisting of the through hole 13A, and its tip is positioned at the upper part of the space 5, and a heat insulating material such as Ar, SF _6, etc., which has a higher specific gravity than air, is introduced into the space 5 from the supply nozzle 14. Gas G is gradually supplied 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. Furthermore, when a sealing member is provided around the outer periphery of the frame member, a portion of the sealing member enters the passage and the space, resulting in the disadvantage that preliminary work must be performed to remove the sealing member that has entered the passage before supplying the insulating gas. Ta.

(d) Object of the present invention An object of the present invention is to provide a method for manufacturing a multilayer transparent plate that allows easy assembly of frame members and facilitates sealing operations before and after supplying insulating gas.

(e) Outline of the present invention The present invention comprises a spacer having a cylindrical shape and a hollow portion filled with a large amount of desiccant, and a corner connector having two legs inserted into the hollow portion of the spacer. At least one frame member assembled by is bonded to the peripheral edges of opposing surfaces of at least two opposing transparent plates via an adhesive to interconnect both transparent plates and the frame member. In a multilayer transparent plate formed by forming at least one space inside and filling this space with an insulating gas having a specific gravity higher than that of air, the base part is located between the legs and is not inserted into the hollow part of the spacer, and the base part A frame member is constructed using a corner connector having a thin film part formed with a thinner wall and breakable in a part of the frame member, and a passage closed on one side by the thin film part. After filling the groove formed between the outer circumferential surface of the member and the transparent plate with a sealing member in an annular manner, the thin film portion is ruptured to communicate the space with the outside through a passage, and the passage is located at the upper part. After that, a supply nozzle is placed at the bottom of the space from the passage, and the space is filled with insulating gas, and the air in the space is exhausted from this passage. After filling with the insulating gas, the supply nozzle is removed and the broken part is removed. The present invention provides a method for manufacturing a multilayer transparent plate sealed with a sealing member.

(f) Embodiments of the invention FIGS. 9 to 13 show embodiments of the invention.
In addition, in FIGS. 9 to 13, FIGS. 1 to 8
The same symbols as in the figure are the same.

12n is both legs 12l of the corner connector 12A,
The bases 12i and 12J formed between 12m are abutment surfaces formed by refining the boundaries between this base and both legs, and the legs 12l and 1 of the corner connector 12A
When the spacers 4A and 4C are inserted into the hollow portions 9 of the spacers 4A and 4C, one end surface of the spacers 4A and 4C is brought into contact with and butted against the contact surfaces 12i and 12J, respectively.
Both inner and outer surfaces and both side surfaces of the base 12n and both spacers 4A, 4C are flush with each other, and the base 12n does not overlap the spacers 4A, 4C. 12h is a passage passing through a part of both the inner and outer surfaces of the base; 12s is a cylindrical part rising outward from the outer opening periphery of this passage;
12t is a breakable thin film portion that closes the outer surface of this cylindrical portion, and these are integrally formed during molding of the corner connector 12A. In addition, other corner connectors 12
B, 12C, and 12D also have a base 12n and a contact surface 1.
2i and 12J are 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, the annular groove formed by the inner circumferential end surfaces of both the transparent plates and the outer surface of the frame member is filled with a resin sealing member 7 such as thiocol up to the height of the cylindrical portion 12s of the frame member 3. In addition to adhering to the surface, the thin film portion 12t
A semi-finished product is obtained in which the space 5 is kept airtight by being exposed to the outside. Next, after breaking the thin film portion 12t with a sharp knife to communicate the space 5 with the outside via the cylindrical portion 12s and the passage 12h, the semi-finished product is assembled so that the passage 12h is located at the upper part of the frame member 3. erect. Next, the supply nozzle 14 is passed through the cylindrical portion 12s and the passage 12h into the space 5, and the insulating gas G is supplied to the 11th
By supplying the air to the space 5 as shown in the drawings and FIG. 12, the air in the space 5 is gradually pushed up and discharged to the outside from the cylindrical portion 12s and the passage 12h as shown by the arrow. After filling with the insulating gas G, as shown in FIG. 13, the broken part of the thin film portion 12t is closed with a cap-shaped sealing member 7' of the same quality as the sealing member, thereby sealing the space 5 with the insulating gas G and sealing the desired compound. The layered transparent plate 1 is completed.

According to such a method of manufacturing a multilayer transparent plate, a passage 12 is provided in the base 12n that does not overlap with the spacers 4A and 4C.
Since the frame member 3 is assembled using the corner connector 12A formed with a corner connector 12A, the passage 12h can be placed in a predetermined position by simply inserting the legs 12l, 12m of the corner connector 12A into the spacers 4A, 4C. At the same time, the assembly of the frame member 3 can be completed, and the frame member 3 can be assembled.
The assembly work can be speeded up, and the shortcomings of the background technology can be solved at once. In addition, the sealing member 7 can be prevented from entering the passage 12h by the thin film portion 12t integrally formed with the base portion 12n in a rupturable manner, and preliminary work before supplying the insulating gas G can be eliminated.

(g) Other embodiments of the present invention (1) Fig. 14 shows one corner connector 12A.
and a spacer 4 which is notched and bent into a V shape at three places.
The frame member 3 assembled by A is shown, and the 15th
The figure shows the process of injecting the insulating gas G into the multilayer transparent plate 1 assembled using this frame member.

(2) Figures 16 and 17 show three transparent plates 2
A, 2B, 2C and two corner connectors 12
A and 12B have a cylindrical portion 12s and a thin film portion 12t, respectively.
A three-layer transparent plate 1' that forms two spaces 5A and 5B with two frame members 3A and 3B that form
A perspective view showing a semi-completed state is shown.

(h) Application of the finished product according to the present invention FIG. 18 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, and a passage 12h is formed. An application is shown in which the door is provided in the front of the refrigerator 41 so that it can be opened and closed so as to be located at the upper part.

(I) Effects of the Present Invention According to the present invention, there is a cylindrical portion rising outward from the outer opening periphery of the passage, and a rupturable thin film portion that closes the outer surface of the cylindrical portion and protrudes above the sealing member. Because it is integrally formed with the corner connector,
When arranging the sealing member, the work can be done without worrying about blocking the passage with the sealing member, and the work of arranging the sealing member is simplified, and it is possible to avoid the sealing member from entering the passage, and as a result, Preliminary work before supplying insulation gas can be eliminated.

In addition, the passage formed in the corner connector can be used not only as an insertion port for the supply nozzle but also as an outlet for air in the space, making it possible to effectively utilize the corner connector.

[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
13 show embodiments of the present invention, FIG. 9 is a perspective view of a corner connector used in the present invention, and FIG.
Figure 0 is an exploded perspective view showing the process of connecting the transparent plate and the frame member, Figure 11 is a perspective view of the multilayer transparent plate in a state where insulating gas is injected, Figure 12 is a sectional view taken along line E-E' in Figure 11, FIG. 13 is a vertical sectional view of the main part showing the sealed state of the passage, FIGS. 14 to 17 show other embodiments of the present invention, and FIG. 14 is an exploded view of a frame member using one corner connector. A perspective view, FIG. 15 is a perspective view showing the insulating gas injection process for a multi-layer transparent plate using this frame member, and FIG. 16 is a perspective view of a three-layer transparent plate.
7 is a sectional view taken along line FF' in FIG. 16, and FIG. 18 is a perspective view of a refrigerator using the multilayer transparent plate manufactured according to the present invention as a door body. 2A, 2B...Transparent plate, 3...Frame member, 4A,
4C... Spacer, 5... Space, 6A, 6B... Adhesive, 7, 7'... Seal member, 9... Hollow part,
12A... Corner connector, 12l, 12m...
Leg, 12n... Base, 12t... Thin film part, 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, The frame member is bonded to the peripheral edges of the opposing surfaces of at least two opposing transparent plates via an adhesive to interconnect 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 specific gravity higher than that of air, a base part located between the legs and not inserted into the hollow part of the spacer, and a part of this base part have a thinner wall thickness. A frame member is constructed using a corner connector having a rupturable thin film portion formed by the thin film portion and a passage closed on one side by the thin film portion, and the outer circumferential surface of the frame member and the transparent plate are connected to each other. After filling the groove formed in between with a sealing member in an annular shape, the thin film portion is ruptured to communicate the space with the outside through the passage, and after the passage is located at the upper part, a supply nozzle is inserted from the passage. The supply nozzle is located at the bottom of the space, and the space is filled with insulating gas, and the air in the space is exhausted from this passage. After filling with the insulating gas, the supply nozzle is removed, and the broken part is closed with a sealing member. A method for manufacturing a multilayer transparent plate.