JPH0125875B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a multi-layer transparent plate in which an insulating gas having a specific gravity higher than that of air is sealed in a space, and its purpose is to manufacture a multilayer transparent plate filled with a large amount of granular desiccant. Two passages are formed on one side of the frame member, which is made up of a connector and a plurality of connectors, to prevent desiccant from leaking from both passages, and one passage is placed at the top to prevent insulating gas from leaking. The purpose is to perform filling well.

If a multilayer transparent plate filled with an insulating gas such as Ar or SF ₆ , which has a higher specific gravity than air and is less likely to cause convection, is used for the windows and doors of general houses, refrigerators, low-temperature storage equipment, and other refrigeration equipment, In addition to reducing the indoor heating and cooling load and the refrigeration load inside the warehouse,
It is known that dew condensation on the outer surface of a multilayer transparent plate can be reduced.

However, these multi-layer transparent plates include those consisting of two or more transparent plates and a frame member, and those consisting of a plurality of transparent plates and a frame member filled with a large amount of granular desiccant. There are two types. The former multi-layer transparent plate is one in which an insulating gas is sealed in the space after the space is evacuated, but there is a large temperature difference in terms of the moisture contained in the insulating gas and the moisture permeability of the sealing member. When used indoors and outdoors or inside and outside the refrigerator for a long period of time, condensation may form on the opposing surfaces of both transparent plates. In addition, in the case of the latter multi-layer transparent board, the frame member is filled with a desiccant agent in order to remove moisture from the insulating gas and moisture that enters the space due to its moisture permeability. Since the spacer and the air exhaust passage are formed in the spacer, the desiccant may leak into the space and the outside from these passages during the manufacturing process. It was necessary to perform post-processing work such as replenishing desiccant to the frame members.

The present invention improves this point.

Examples of the present invention will be described below with reference to the drawings.
1 shown in FIGS. 1 and 2 is a multilayer transparent plate used for refrigeration equipment such as refrigerators, freezers or refrigerated cases, and windows and doors of general houses. Two transparent plates 2A made of rectangular glass are used. , 2B, and four spacers 4A, 4B, 4C, 4D connected in a frame shape and interposed between the peripheral end surfaces of the opposite surfaces of both transparent plates.
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. 6A and 6B are both transparent plates 2
An adhesive such as double-sided adhesive tape 7 for bonding A, 2B and the frame member 3 to each other is filled in an annular groove formed by the peripheral end surfaces of both the transparent plates and the outer surface of the frame member, and This is a resin-based sealing member such as Thiokol that adheres to each surface to keep the space airtight. Reference numeral 8 denotes a granular desiccant that is filled in a large amount in each of the spacers. For example, silica gel has a quick hygroscopic action and absorbs the residual moisture in the space 5, and silica gel has a long hygroscopic action and absorbs the remaining moisture in the space 5. It is made of a mixture with molycula sieves that absorbs moisture that enters the inside.

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 and 3B are two connectors 12
One leg of A, 12B, that is, legs 12m, 12l inserted into the hollow part 9 of the same spacer 4A from both the left and right sides.
Both openings 11 of the spacer 4A are through holes formed in the spacer 4A.
Corresponds to A and 11B, and also connects 12A and 12B
When the legs 12m and 12l are inserted into the spacer 4A and stacked on both ends of this spacer, both openings 11A and 1
Together with 1B, 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, the hollow part 9 of each spacer is filled with desiccant 8, and then the spacers 4A and 4B are connected by the connector 12D using the connector 12B. Spacer 4C, 4D
At the same time, connect both openings 11A, 11B of the spacer 4A and the connectors 12A, 1.
The through holes 13A and 13B of 2B are aligned to form two passages. At this time, each connector serves as a stopper to prevent the desiccant 8 from leaking from the hollow portion 9. After assembling the frame member, each spacer 4A, 4
Adhesives 6A and 6B are adhered to opposite surfaces of B, 4C and 4D other than the inner and outer surfaces, and then this adhesive is adhered to the peripheral end surfaces of the opposing surfaces of both transparent plates 2A and 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 to 9, 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 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 passed through the other passage consisting of the opening 11A and the through hole 13A to the space 5.
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.

According to this manufacturing method, openings 11A and 11B formed at both ends of one spacer 4A, and one of each of connectors 12A and 2B that interconnect this spacer and other spacers 4B and 4C. The through holes 13A and 13B formed by the legs 12m and 12l form two passages that communicate the inside of the space 5 with the outside, and the legs 12m and 12l of both the connectors 12A and 12B are used to prevent the desiccant 8 from leaking. Since it is used as a member, the multilayer transparent plate 1 can be assembled without using a new leakage prevention member, and the openings 11A,
It is possible to reliably prevent the desiccant 8 from leaking into or outside the space 5 from the through holes 11B and the through holes 13A and 13B. Therefore, the multilayer transparent plate 1 in a semi-finished product state
The assembly work can be carried out quickly, and the post-processing work caused by the leakage of the desiccant 8, that is, the removal of the desiccant 8 in the space 5 and the replenishment of the desiccant 8 into the hollow part 9, can be completely eliminated. .

In addition, after arranging the semi-finished product so that the spacer 4A is located at the top, the insulating gas G, which has a higher specific gravity than air, is supplied into the space 5 from the supply nozzle 14 inserted into one of the passages. Not only the air in the space 5 as it descends, but also the air in each hollow part 9 can be automatically raised and discharged to the outside from the other passage, and the insulating gas can be discharged into the space 5 and the hollow parts 9. Since G can be filled quickly and the supply nozzle 14 is located at the lower part of the space 5,
Convection of the insulating gas itself and air accompanying the supply of the insulating gas G can be prevented.

Furthermore, after filling with the insulating gas G, the opening 11A,
11B can be closed, openings 11A and 11
There is no need to close B with a separate seal member. In addition, in this manufacturing method, if the diameter L of the opening 11B is made larger than the diameter l of the through hole 13B in advance as shown in FIG. It is possible to prevent damage to the outer surface of the supply nozzle 14 due to the generated particles, and the durability of the supply nozzle 14 can be extended.

12 to 14 show other embodiments of the present invention, in which both transparent plates 2A, 2B, each spacer 4A, 4B,
4C, 4D and each connector 12A, 12B, 12
After bonding the frame member 3 consisting of C and 12D to each other, a drill or the like is passed through the seal member 7, the spacer 4A, and the connector 12B to form the opening 11B and the through hole 13.
After forming the other opening 11A and the through hole 13A in the same manner, the supply nozzle 14 supplies the insulating gas G into the space 5, and the exhaust nozzle 1
After exhausting the air in the space 5 and filling the space 5 with insulating gas G, the opening 11B is closed with a cap-shaped sealing member 7' made of the same material as the sealing material 7, and the other openings 11A are closed in the same manner. This shows the manufacturing method that results in blockage.

According to this manufacturing method, two passages consisting of both openings 11A, 11B and through holes 13A, 13B can be obtained by drilling holes in two places in the semi-finished multilayer transparent plate 1. Opening 11A,
There is no need to position the through holes 11B and the through holes 13A and 13B, and the assembly work can be done quickly.Moreover, in order to perform the drilling work on any spacers and connectors after assembly, it is possible to insulate even a ready-made multilayer transparent plate. Can be filled with gas G.

According to the present invention described above, the following effects are produced.

Both passages, which serve as an insulating gas supply path and an air discharge path, are placed at the top to fill with insulating gas and discharge air, so the specific gravity inside the space and frame member is low due to the supply of high specific gravity insulating gas. The air is pushed up by the insulating gas, and as a result, the air can be automatically discharged and replaced with almost no residual air in the space.

Since the tip of the supply nozzle is located at the bottom of the space, the insulating gas supplied from the supply nozzle is diffused laterally at the bottom of the space and gradually increases in thickness. Since there is less convection of air and there is no so-called air entrainment, the supply time of the insulating gas is shortened.

Since both the passages serving as the insulating gas supply passage and the air discharge passage are located at the upper part of the frame member, the insulating gas does not leak from both passages even after the supply of insulating gas into the space is finished and both passages are closed.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a perspective view of a multilayer transparent plate manufactured according to the present invention, FIG. 2 is a sectional view taken along line A-A' in FIG. 1, and FIG. 3 is an exploded perspective view of a frame member. Figure 4 is a cross-sectional view taken along the line B-B' in Figure 1, Figure 5 is a cross-sectional view taken along line C-C' in Figure 4, Figure 6 is a plan view of the main parts, and Figure 7 is a multi-layer transparent illustrating the manufacturing process. A perspective view of the plate, FIG. 8 is a sectional view taken along line C-C' in FIG. 7, FIG. 9 is a sectional view taken along line E-E' in FIG. 8, FIG. A longitudinal sectional view showing the diameters of the opening and the through hole, FIGS. 12 to 14 show other embodiments of the present invention, and FIG. FIG. 13 is a vertical sectional view of the main part showing the state after gas is filled, and FIG. 14 is a plan view of the same. 2A, 2B...Transparent plate, 3...Frame member, 4A, 4
B, 4C, 4D...Spacer, 5...Space, 6A, 6B
...Adhesive, 7...Sealing member, 8...Drying agent, 9...Hollow part, 11A, 11B...Opening, 12A, 12B,
12C, 12D...connection tool, 12l, 12m...leg,
13A, 13B...through hole, G...insulating gas.

Claims (1)

[Claims] 1 A spacer comprising a plurality of cylindrical spacers whose hollow parts are filled with a large amount of granular desiccant, and two substantially perpendicular legs each inserted into the hollow parts of adjacent spacers among these spacers. At least one frame member assembled with a plurality of corner connectors is bonded to the peripheral edges of opposing surfaces of at least two transparent plates via an adhesive to connect both transparent plates and the frame member. In a multi-layer transparent plate which is formed by connecting each other to form a space inside and filling this space with an insulating gas having a higher specific gravity than air, when the insulating gas is supplied, a space is formed in the upper side of the frame member. Two passages are formed that communicate with the outside, one as an insulating gas supply passage to the space and the other as an air discharge passage from the space, and with both passages located at the top, the tip of the supply nozzle is inserted into the space. A method for manufacturing a multilayer transparent plate, in which the space is filled with an insulating gas and the air in the space is exhausted, and then both passages are closed with a sealing member.