JPH0253379B2 - - 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 explained 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
C and a frame member 3 mainly composed of 4D, and an insulating gas G such as Ar or SF6 having a specific gravity higher than that of air is contained inside the frame surrounded by both the transparent plates and the frame member.
A space 5 is formed in which the space 5 is enclosed. 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, and 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 with a fast moisture-absorbing effect and slow-drying moriquila sieves with a slow moisture-absorbing effect.

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, 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,
After connecting the spacers 4B and 4D in an L-shape using the connecting tool 12C, the hollow part 9 of each spacer is filled with desiccant 8, and then the connecting tool 12B connects the spacers 4A and 4B and the connecting tool 12D. 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 and 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 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 and 8, the supply nozzle 14, which is a long and thin tube 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. Insert into the space 5 through the other passage consisting of the through hole 13A and position its tip at the upper part of the space 5, and supply an insulating gas such as Ar or SF6, which has a higher specific gravity than air, into the space 5 from the supply nozzle 14. Supply G gradually 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 adhering both 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 seal member is provided around the outer periphery of the frame member, a portion of the seal member enters the passageway, resulting in the disadvantage that preliminary work must be performed to remove the seal member that has entered the passageway before supplying the insulating gas. Ta.

(d) Objective of the present invention To facilitate the assembly work of frame members, to prevent the sealing member from entering the passage before supplying the insulating gas, and to easily seal the passage after supplying the insulating gas. What I did.

(e) Outline of the present invention A base portion that is not inserted into the hollow portion of the spacer between the legs, two thin film portions adjacent to each other with a thin wall on a part of the base portion, and one side of the base portion is closed by the thin film portion. A frame member is constructed using one corner connector that forms two passages that can be separated, and after filling a sealing member around the outer surface of the frame member, one of the sealing members located on the outside of both thin film parts is The lower end of the supply nozzle is inserted into the space from one of the passages, and the corner connector is positioned on the upper part of the frame member. Located at the bottom to supply insulating gas into the space,
A method for manufacturing a multilayer transparent plate that exhausts air in the space to the outside from the other passage.

(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 contact surfaces formed by refining the boundaries between this base and the legs, and the legs 12l and 12 of the corner connector 12
When the spacers 4A, 4C are inserted into the hollow portions 9 of the spacers 4A, 4C, one end surface of the spacers 4A, 4C abuts against the contact surfaces 12i, 12J, respectively, and the base 12n and both the spacers 4A, 4C are brought into contact with each other. The inner and outer surfaces and both side surfaces are flush with each other, and the base 12n does not overlap the spacers 4A and 4C. 12h, 12h are adjacent passages passing through a portion of both the inner and outer surfaces of the base, 12s, 12s are cylindrical portions rising outward from the outer opening periphery of these passages, and 12t, 12t are adjacent passages passing through a portion of both the inner and outer surfaces of the base; These are breakable thin film portions that close the sides and are integrally formed when the corner fitting 12A is molded. In addition, other corner connectors 12B, 12C,
12D also has a base 12n and contact surfaces 12i, 12J.
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 by both 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 portions 12s, 12s of the frame member 3. A semi-finished product is obtained by adhering to each of the surfaces and exposing the thin film portion 12t to the outside to maintain airtightness of the space 5. Next, the thin film portion 12t,
12t was broken with a sharp knife and the cylindrical parts 12s, 12
After communicating the space 5 with the outside through the passages 12h and 12h, the semi-finished product is erected so that the corner connector 12A is located at the upper part of the frame member 3. Next, the supply nozzle 14 is passed into the space 5 from the one cylindrical portion 12s and the passage 12h, and the lower end of the supply nozzle 14 is positioned in the lower part of the space 5 to supply the insulating gas G as shown in FIGS. 11 and 12. By supplying the insulating gas G to the space 5 as shown in FIG. The other cylindrical portion 12s
and is discharged to the outside from the passage 12h. After filling with the insulating gas G, as shown in FIG. 13, the thin film portion 12t,
By closing the broken portion of 12t with cap-shaped seal members 7', 7' of the same quality as the seal member, the desired multilayer transparent plate 1 in which the space 5 is filled with the insulating gas G 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.
In order to assemble the frame member 3 using the corner connector 12A formed with the corners h and 12h, the passages 12h and 12h can be specified by simply inserting the legs 12l and 12m of the corner connector 12A into the spacers 4A and 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.
Moreover, the cylindrical portions 12s, 12s not only simplify the installation work of the seal member 7, but also the cylindrical portions 12s, 1
The thin film portions 12t, 12t integrally formed on the insulating gas G can prevent the sealing member 7 from entering the passages 12h, 12h, and eliminate the preliminary work before supplying the insulating gas G.
2 hours of sealing work becomes easy.

Furthermore, when supplying the insulating gas G, since the lower end of the supply nozzle 14 is located at the lower part of the space 5, the supplied insulating gas G does not come into contact with the air in the upper and central parts of the space 5, but gradually flows from the lower part. Therefore, the air in the space 5 is not entrained by the force of supply of the insulating gas G, and the insulating gas G and air can be replaced in a short time, and a high replacement efficiency can be obtained.

(g) Other embodiments of the present invention Part (1) Fig. 15 shows one corner connector 12A.
and a spacer 4A with three places cut out and bent into a V shape.
FIG. 16 shows the process of injecting heat insulating gas G into the multilayer transparent plate 1 assembled using this frame member.

(2) Figures 17 and 18 show three transparent plates 2
A, 2B, 2C and two corner connectors 12
A perspective view showing a semi-completed state of a three-layer transparent plate 1' in which two spaces 5A and 5B are formed by two frame members 3A and 3B in which a cylindrical portion 12s and a thin film portion 12t are formed on A and 12B, respectively.

(H) Use of the finished product according to the present invention Fig. 19 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 4C, 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.

(li) Effects of the present invention According to the present invention, the following effects are produced.

Because the two adjacent passages of one corner connector and the breakable thin film portion covering the outside of these passages are integrally formed, when installing the sealing member, it is necessary to close the passages with the sealing member. The work can be carried out without worrying about this, the work of arranging the sealing member is simplified, and the sealing member can be prevented from entering the passage, and as a result, preliminary work before supplying the insulating gas can be eliminated.

When supplying insulating gas, since the lower end of the supply nozzle is located at the bottom of the space, the supplied insulating gas does not touch the air in the upper and central parts of the space, and is gradually filled from the bottom. Provides a multi-layer transparent plate with high heat insulating effect, which eliminates entrainment of the air in the space due to the force of the supply of heat insulating gas, allows the heat insulating gas to be replaced with air in a short time, and achieves high replacement efficiency. can.

[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′ 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, 12h...passage, 12s...
...Cylinder part, 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, 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 formed by filling this space with an insulating gas having a higher specific gravity than air, there is a base part that is not inserted into the hollow part of the spacer between the legs, and a part of this base part that is adjacent to each other with a thinner wall thickness. A frame member is constructed using both thin film parts and one corner connector that forms two passages that are closed on one side by the thin film parts, and the space between the outer surface of the frame member and the transparent plate is After filling the groove formed in the frame member with a sealing member in an annular shape, both thin film portions are ruptured to communicate the space with the outside through a passage, and after positioning the corner connector on the upper part of the frame member, one A method for manufacturing a multilayer transparent plate, in which the lower end of a supply nozzle is located at the bottom of the space from one passage to supply insulating gas into the space, and the air in the space is discharged to the outside from the other passage.