JPH11240739A - Production of double glazing and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a double glazing, designed to shorten exhaust time and cut the steps for exhaustion and closure. SOLUTION: This method for producing a double glazing comprises the following process: a hole 7 bored on one of a pair of glass plates 1, 2 sealed therearound is fitted with a cylindrical low-melting closure member 20 with a through hole 19 so as to somewhat project on the surface of the glass plate 1, the air in the intermediate layer 15 is then exhausted via the through hole 19 followed by heating the end outside the closure member 20 to close the through hole 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a double glazing.

[0002]

2. Description of the Related Art FIG. 10 is a longitudinal sectional view showing an example of a conventional method of exhausting an intermediate layer of a double-glazing unit. The surroundings of the glass plates 1 and 2 facing each other with the spacer 3 interposed therebetween are sealed with a sealing material 4, and the inside of the intermediate layer 5 between the glass plates 1 and 2 held in parallel is evacuated and closed in a vacuum state. By doing so, the multi-layer glass 6 is configured.

Conventionally, when the intermediate layer 5 between the pair of glass plates 1 and 2 is evacuated, a hole 7 having a step 7a is formed in one of the glass plates 1 and the glass 7 is formed up to the step 7a of the hole 7. One end of the tube 8 is inserted, and one end of the glass tube 8 is fixed to the glass plate 1 with a solder 9 for a kiln, and the glass tube 8 is vertically projected from the surface of the glass plate 1.

Next, the opening 10 is tightly fitted to the outside of the glass tube 8 with a packing 12 interposed between the inside of the opening 10 of the exhaust pipe 11 having a wide opening 10 bent at a right angle. Then, a vacuum pump (not shown) is connected to the other end of the exhaust pipe 11, or the vacuum pipe is inserted into the vacuum chamber and suction is performed. The inside of the intermediate layer 5 between the glass plates 1 and 2 is exhausted through the glass pipe 8. The gas is exhausted through the pipe 11.

When the intermediate layer 5 between the glass plates 1 and 2 is evacuated to a predetermined degree of vacuum, the intermediate portion 13 of the glass tube 8 connecting the intermediate layer 5 and the exhaust pipe 11 is laterally gas-burned. It is heated by a heater 14 such as a heater. When the intermediate portion 13 of the glass tube 8 reaches the melting point, the exhaust pipe 11 is moved in a direction away from the surface of the glass plate 1 as shown by an arrow 15. As a result, the glass tube 8 is pulled in the direction of arrow 15 to melt the intermediate portion 13.
At the same time, the inner diameter of the intermediate portion 13 is closed by suction of the intermediate layer by vacuum pressure.

Next, when the upper portion of the closed portion of the intermediate portion 13 of the glass tube 8 is cut, a sharp closed portion 16 is formed in the glass tube 8 as shown in FIG. During this time, the evacuation and closing steps of the intermediate layer 5 are completed.

When the double-glazed glass 6 is used for a window of a building or the like, the closed portion 16 of the glass tube 8 shown in FIG. 11 is exposed to the outside without entering the sash. For this reason, in the case of window glass cleaning or the like, there is a possibility that the closing tool 16 may be damaged by a cleaning tool. In addition, since some of the solder for kiln 9 is weak to water, it is necessary to waterproof the solder 9 for kiln.

For this reason, a plastic lid 17 that covers the closed portion 16 of the glass tube 8 and the periphery of the solder 9 for the kiln body may be attached.

[0009]

When a double glazing 6 is produced, a pair of glass plates 1 and
2 to reduce the evacuation time for exhausting the inside of the intermediate layer 5;
In addition, there is a demand for shortening the time required for closing and improving the production efficiency of the double glazing 6.

In order to shorten the evacuation time of the intermediate layer 5 between the glass plates 1 and 2, if the inner diameter of the glass tube 8 is increased or if the length of the glass tube 8 is shortened, the evacuation resistance is reduced. Thus, the evacuation time in the evacuation process can be reduced.

However, when the inner diameter of the glass tube 8 is increased, the intermediate portion 13 of the glass tube 8 is melted by the heater 14 in FIG. The distance to which the glass tube 8 is pulled becomes longer, and the glass tube 8 which is thin and elongated is closed.
Is cut, the height 18 of the closing portion 16 increases, and the lid 17
Has a problem that the aesthetic appearance of the double glazing 6 is impaired.

In the conventional exhaust method shown in FIG.
Drilling a hole 7 with a stepped portion 7a, inserting a glass tube 8 into the hole 7 and fixing the glass tube 8 to the glass plate 1 with a solder 9 for a kiln body, exhausting the intermediate layer 5, an intermediate portion of the glass tube 8 An operation of closing the intermediate portion 13 of the glass tube 8 by moving the exhaust pipe 11 in the direction of arrow 15 at the same time as melting the
Since many steps such as cutting of the glass tube 8 are required, reduction of the number of steps is also a problem.

An object of the present invention is to provide a method and an apparatus for manufacturing a double glazing which can solve such a problem and reduce the exhaust time and the number of steps for exhausting and closing. It is the purpose.

[0014]

SUMMARY OF THE INVENTION According to the present invention, air in an intermediate layer is supplied to a hole formed in one of a pair of parallel glass plates whose periphery is sealed and an intermediate layer is formed therein. Providing a low melting point closing member formed of solder for kiln so as to be able to be sucked from the outside, after achieving a predetermined degree of vacuum by suction of air in the intermediate layer, heating and melting the end of the low melting point closing member. A method for producing a double glazing characterized by closing the hole,
A hole is formed in one of the glass plates, and a low melting point closing member capable of sucking air in the intermediate layer from the outside is provided in this hole, and a predetermined degree of vacuum is created by suction of the air in the intermediate layer. After the completion, the end of the low melting point closing member is heated and melted to complete the evacuation of the intermediate layer of the double glazing.

[0015] When a disc-shaped low melting point closing member is pressed against a hole formed in one of the glass plates and heated and melted,
The hole can be sealed in a flat state.

According to the present invention, there is further provided a through hole formed in one of a pair of parallel glass plates having a sealed peripheral portion and an intermediate layer formed therein, and having a through hole at the center and having an inner end portion. Is connected to the intermediate layer, and a cylindrical low-melting point closing member made of solder for a kiln fitted so that an outer end thereof slightly protrudes from the surface of the one glass sheet, and a low-melting point closing of the one glass sheet A box that hermetically covers around the hole in which the member is fitted, an exhaust pipe connected to the box, and a heating unit supported by the box and pressed against the outer end of the low melting point closing member And an apparatus for manufacturing a double-glazed glass, comprising:
When suction is performed by an exhaust pipe connected to the box in a state where the area around the hole in which the cylindrical low-melting point closing member is fitted is air-tightly covered with a box, through the cylindrical low-melting point closing member, The air in the intermediate layer can be exhausted, and the heating unit can be closed by pressing the heating unit against the low melting point closing member from the outside.

Further, if a step is provided in the hole or a notch is formed at the inner end of the cylindrical low melting point closing member, the through hole of the low melting point closing member and the intermediate layer can be communicated. Can be.

Further, when the heating section is provided with a conical pressing recess, the through-hole in the heat-melted cylindrical low-melting-point closing member is effectively closed.

The present invention also provides a step formed by enlarging the outer diameter of a hole formed in one of a pair of parallel glass plates having a sealed inner periphery and an intermediate layer formed therein. Part, a disc-shaped low-melting point closing member made of solder for a kiln having a thickness fitted on the step and having an outer surface slightly protruding from the surface of one of the glass sheets, and the disc-shaped low-melting point A support for a solder for a kiln body, which is disposed between a part of the outer periphery of the closing member and the stepped portion and holds the low melting point closing member obliquely to allow the intermediate layer to communicate with the outside, and the one glass plate A box that hermetically covers around the hole in which the disc-shaped low-melting point closing member is disposed, an exhaust pipe connected to the box, and an outer surface of the disc-shaped low-melting point closing member supported by the box. And a heating unit adapted to press against the glass sheet. In a state in which the disk-shaped low melting point closing member is hermetically covered with a box around the hole held obliquely by the support for the solder for the kiln, suction is performed by the exhaust pipe connected to the box. When this is done, the air in the intermediate layer can be exhausted through the oblique disk-shaped low melting point closing member, and the heating section can be closed by pressing the heating portion against the low melting point closing member from the outside.

When the heating section has a flat pressing surface, the surface closed by the disk-shaped low melting point closing member can be formed flat.

The present invention further comprises a heating section slidably supported by the box, and an actuator for moving the heating section toward and away from the low melting point closing member by supplying and discharging a fluid. Pertaining to a double-glazing manufacturing apparatus,
By supplying and discharging the fluid to and from the elastic body, the heating unit can be pressed against the low-melting-point closing member from the outside or separated from the low-melting-point closing member.

The present invention is also directed to a shelf for mounting a pair of parallel glass plates which are provided in multiple stages on a column attached to a gantry and whose periphery is sealed. And a box capable of appearing and retracting on the surface of the glass plate mounted on the shelf. Can be evacuated simultaneously.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an example of an apparatus used in the method of the present invention. The periphery of the glass plates 1 and 2 is sandwiched between a pair of glass plates 1 and 2 with a minute spacer 3 interposed therebetween. Is sealed with a sealing material 4 to hold the glass plates 1 and 2 in parallel to form a double-layer glass 6.
A hole 7 is provided.

In this hole 7, the lower end of a cylindrical low melting point closing member 20 having a through hole 19 formed at the center by kiln solder is tightly fitted to the step 7a. When the lower end of the cylindrical low melting point closing member 20 is tightly fitted into the hole 7 of the glass plate 1 up to the step portion 7a, the outer end above the low melting point closing member 20 extends from the surface of the glass plate 1 The length is slightly protruding.

As the solder for the kiln constituting the cylindrical low melting point closing member 20, a low melting point metal solder (glass solder) whose adhesion to the glass plates 1 and 2 is enhanced by adding an additive such as zinc or the like. Low melting point glass or the like can be used.

Reference numeral 21 denotes a cylindrical box whose lower part is open, an exhaust pipe 22 is connected to the side surface, and a lid 23 is fixed to the outer periphery of the upper end to cover the upper part of the box 21. ing. A plunger 24 having a hollow inside penetrates through the center of the case 21, and the plunger 24 is fixed to the upper surface of the case 21 by the guide ring 2.
5 and the cylindrical box 2 as shown by arrow 26
1 can be slid up and down along the central axis.

A metal bellows 27 is attached to the outer periphery of the lower part of the plunger 24 and the inner surface of the upper part of the box 21 to hermetically partition the inside of the box 21 and the lid 23. A heater 28 is provided inside the lower portion of the plunger 24, and a heating section 29 is provided at the lower end of the plunger 24.
Is attached.

As the heater 28, an electric heater, an ultrasonic heater, or the like is used. As the heating unit 29, a copper alloy or the like having a high thermal conductivity is used. The lower end of the heating unit 29 has a conical pressing recess 29a. Is preferred.

The plunger 24 is provided with an actuator for driving the heating unit 29 up and down. This actuator is capable of moving the heating section 29 far and near with respect to the low melting point closing member 20 by supplying and discharging a fluid, and uses a cylinder or a telescopic body similar to this.
FIG. 1 shows an example of the latter.

A pressure plate 30 is horizontally fixed to the upper end of the plunger 24, and a balloon-shaped balloon made of heat-resistant resin or the like is provided between the upper surface of the pressure plate 30 and the inner lower surface of the lid 23. A first elastic body 31 is provided, and between the periphery of the lower surface of the pressing plate 30 and the upper surface of the box 21, a second elastic body 32 made of a heat-resistant resin or the like is provided. I have.

First elastic body 31 and second elastic body 32
Can supply and discharge fluid such as compressed air, water, and oil. When a fluid is supplied to the first expandable body 31 and the fluid is discharged from the second expandable body 32, The first elastic body 31 expands, the second elastic body 32 contracts, and the plunger 24 is lowered. Further, when the fluid is discharged from the first elastic body 31 and supplied to the second elastic body 32, the first elastic body 31 contracts and the second elastic body 32
Expands, causing the plunger 24 to rise.

In the present embodiment, the heating unit 29 is moved toward and away from the low-melting-point closing member 20 by the two elastic members 31 and 32. The heating unit 29 can be moved up and down by the body.

A packing 33 is attached to the lower end of the cylindrical box 21 described above.

Next, the step of evacuating the intermediate layer 5 between the glass plates 1 and 2 using the apparatus shown in FIG. 1 will be described.

First, as shown in FIG.
The lower end of the cylindrical low-melting point closing member 20 is tightly fitted to the position of the step 7a from above the hole 7 formed in the hole. As shown in FIG. 1, when the box 21 is placed on the surface of the glass plate 1 around the low melting point closing member 20, the packing 33 is interposed at the lower end of the box 21. The low melting point closing member 20 is hermetically covered with a box 21.

In this state, when a vacuum pump is connected to the exhaust pipe 22 and suction is performed, the intermediate layer 5 between the glass plates 1 and 2 passes through the inside of the box 21 and the through hole 19 of the cylindrical low melting point closing member 20. Is decompressed.

When the degree of decompression inside the box 21 approaches a predetermined pressure, the heater 28 starts to be heated, and the degree of decompression inside the box 21 reaches a predetermined pressure and the inside of the intermediate layer 5 becomes a predetermined degree of vacuum. After the air is exhausted to a state and the temperature of the heating unit 29 by the heater 28 reaches a predetermined temperature, the fluid is supplied to the first elastic body 31 to discharge the fluid from the second elastic body 32 and the plunger 24 is discharged. Is lowered, and the plunger 2 is attached to the outer end of the low melting point closing member 20 slightly protruding from the surface of the glass plate 1.
4. Press the lower end of the heating section 29.

By this operation, the heat of the heater 28 is transmitted to the outer end of the cylindrical low melting point closing member 20 via the heating section 29, and the low melting point closing member 20 starts to melt. As shown in FIG. 3, the through hole 19 at the outer end of the cylindrical low-melting point closing member 20 is closed for melting, and the outside of the cylindrical low-melting point closing member 20 is welded to the hole 7 to form a glass. Plates 1, 2
The intermediate layer 5 is kept exhausted.

When the hole 7 formed in the glass plate 1 is provided with a stepped portion 7a as shown in the figure, the bottom surface as well as the outer peripheral surface of the cylindrical low melting point closing member 20 is also formed in the hole 7 of the glass plate 1. Due to welding, sealing strength is increased.

Further, when the heating section 29 is provided with the conical pressing recess 29a, the through-hole 19 can be effectively closed by the heat-melted low melting point closing member 20.

In the above-described exhaust method, the hole 7 having the step portion 7a is formed, the cylindrical low melting point closing member 20 is inserted,
In the process of exhausting the intermediate layer 5 and melting the low melting point closing member 20, all operations can be completed, and the operation can be significantly simplified.

The cylindrical low-melting point closing member 20 whose outer end is melted is strong against external impacts only by slightly projecting from the surface of the glass plate 1 as shown in FIG. In the case where 20 is water-sensitive, the lid 34 needs to be attached.

Further, instead of the method in which the through hole 19 of the low melting point closing member 20 and the intermediate layer 5 are communicated with each other by the step portion 7a shown in FIG. 1, a low melting point as shown in FIGS. When the notch 20a is formed at the inner end of the closing member 20, even if the inner end surface of the low-melting-point closing member 20 is fitted into the hole 7 such that the inner end face of the closing member 20 is in contact with the inner surface of the other glass plate 2, The connection with the intermediate layer 5 can be made. FIG. 5 shows an example of a notch 20a in which the inner end of the low melting point closing member 20 is cut obliquely, and FIG. 4 shows a notch 20a in which the inner end of the low melting point closing member 20 is cut out stepwise. Is shown.

FIGS. 6 to 8 are views showing another example of the apparatus used in the method of the present invention. The apparatus is formed by increasing the outer diameter of a hole 7 formed in one glass plate 1. A disc-shaped low-melting-point closing member made of solder for a kiln, which has a stepped portion 7a and has a thickness fitted on the stepped portion 7a and having an outer surface slightly protruding from the surface of the one glass plate 1. 41 are provided. Furthermore, a support made of solder for a kiln arranged between a part of the outer periphery of the disc-shaped low melting point closing member 41 and the stepped portion 7a so as to hold the low melting point closing member 41 at an angle. 42 are provided.

Further, the lower surface of the heating section 29 for pressing the low melting point closing member 41 in this case is a flat pressing surface 29b. At this time, if a thin plate 43 made of copper or the like is attached to the upper surface of the disc-shaped low-melting point closing member 41, the low-melting point closing member 41 is placed on the flat pressing surface 29 b of the heating unit 29 when the low-melting point closing member 41 is heated. It is possible to prevent a problem that the cleaning is difficult due to the adhesion.

In the apparatus shown in FIGS. 6 to 8, the surface of the glass plate 1 around the hole 7 in which the disk-shaped low melting point closing member 41 is obliquely held by the support 42 of the solder for the kiln, When suction is performed by the exhaust pipe 22 connected to the box 21 in a state in which the box 21 is airtightly covered with the box 21 shown in FIG. The air in the layer 5 can be exhausted, and the heating unit 29 is connected to the low melting point closing member 4.
When pressed against the outside, the low melting point closing member 41 is melted and the hole 7 can be closed.

At this time, the flat pressing surface 29b of the heating section 29
As a result, as shown in FIG. 8, the outer shape of the closed portion can be formed flat. Therefore, if the upper surface of the closed portion is covered with a sealing agent 44 such as a resin, the lid protruding outside the glass plate 1 can be formed. It is possible to protect the low-melting-point closing member 41 by waterproofing without providing it, and to improve the aesthetic appearance because the outer surface of the glass plate 1 can be formed in a flat shape without a protruding portion.

In the above description, the disc-shaped low melting point closing member 4
Although the case where 1 is supported by the support body 42 has been described,
The hole 7 can be closed without using the support 42.

In a state where a predetermined degree of vacuum is obtained by evacuating the air in the intermediate layer of the multi-layer glass, a disc-shaped low melting point closing member 41 is pressed against the hole 7 and the low melting point closing member 41 is pressed from the outside thereof. 4
The hole 7 can be closed by heating and melting 1. In this case, if the low-melting-point closing member 41 is attached to a metal plate by bonding or the like, the low-melting-point closing member 41 is pressed through the metal plate, and is heated and melted. The metal plate is flattened, and at the same time, the metal plate is bonded onto the low melting point closing member 41, so that the upper portion of the low melting point closing member 41 can be protected. The hole 7 may not have a step.

FIG. 9 is a perspective view showing still another embodiment of the apparatus used in the method of the present invention. A plurality of columns 36 are mounted on a gantry 35 which can be transported by a cargo handling device such as an overhead crane or a forklift. Is fixed vertically,
A plurality of shelves 37 are supported in multiple stages at predetermined intervals by these columns 36. On each of the shelves 37, the same multi-layer glass 6 as in FIG. 1 can be placed.

A box 21 similar to that shown in FIG. 1 is located slightly above each of the shelves 37 on one of the plurality of columns 36, and rotates horizontally about one column 36 as a rotation center. It is mounted so that it can appear and disappear on the shelf 37 and can be moved up and down within the interval of the shelf 37. And each box 21
The support 36 is provided by an exhaust pipe (not shown) made of a flexible pipe.
The header tube 38 is connected to a pipe 39.
The left end of the pipe 39 is connected to a vacuum evacuation system in the work place by a connecting flange (not shown) so that the pipe 39 can be evacuated in the direction of arrow 40.

When the apparatus shown in FIG. 9 is used, FIG.
In the same manner as described above, the double-glazed glass 6 in which the lower end of the cylindrical low melting point closing member 20 is closely fitted from above the hole 7 formed in one glass plate 1 is placed on each shelf 37. Alternatively, as in FIGS. 6 to 8, the disc-shaped low melting point closing member 41 is closely fitted from above the hole 7 formed in one of the glass plates 1 and held obliquely by the support 42. The laminated glass 6 thus placed is placed on each shelf 37, and the laminated glass 6 thus supported on each shelf 37 is transported together with the gantry 35 into a furnace such as a baking furnace.

Then, after all the boxes 21 are rotated at the same time and moved on each of the double-glazed glasses 6, these boxes 21 are lowered, and the cylindrical low-melting-point closing member of each double-glazed glass 6 is formed. 20
(See FIG. 1) or a disc-shaped low melting point closing member 41
The lower end of the box 21 is brought into close contact with the surface of the glass plate 1 centering on (see FIGS. 6 to 8). Next, when the pipe 39 is connected to the evacuation system in the work place, the pressure inside the intermediate layer 5 of all the multi-layered glass 6 placed on the shelf 37 is reduced.

Subsequently, as described with reference to FIG.
a, or the heating portion 29 having the flat pressing surface 29b shown in FIG. 6 is pressed to melt the cylindrical low-melting point closing member 20 or the disc-shaped low-melting point closing member 41. The evacuation work of all the double glazings 6 placed on is completed at the same time.

When the double glass 6 is smaller than the size of the shelf 37, not only one support 36 but also the other support 36 is used.
In addition, if the box 21 is mounted so as to be rotatable and able to move up and down, a plurality of double-glazed glasses 6 can be placed on one shelf 37 to improve the loading efficiency on the pedestal 35 and improve the work efficiency. Can be further increased. In this case, when exhausting the double-glazed glass 6 whose number is smaller than the number of the boxes 21 attached,
A vacuum valve or the like may be attached to each box 21, and the vacuum valve of the unused box 21 may be closed.

[0057]

According to the first aspect of the present invention, the intermediate layer of the double glazing can be efficiently evacuated and closed in a short time with a small number of steps. It has the effect of being small.

According to the second aspect of the present invention, when a disc-shaped low melting point closing member is pressed against a hole formed in one of the glass plates and heated and melted, the hole can be sealed in a flat state.

According to a third aspect of the present invention, there is provided an exhaust pump connected to a cylindrical body with the surface of the glass plate around the hole in which the low melting point closing member is fitted airtightly covered by the box. When suction is performed by a tube, air in the intermediate layer can be exhausted through the cylindrical low melting point closing member, and the heating unit can be closed by pressing the heating unit against the low melting point closing member from the outside, so that the number of processes is small and efficient. There is an effect that work can be performed.

In particular, by providing a step in the hole or forming a notch at the inner end of the low melting point closing member, the communication between the through hole of the low melting point closing member and the intermediate layer is ensured. There is an effect that can be performed.

Further, when the heating section is provided with a conical pressing recess, there is an effect that the through-hole in the heat-melted cylindrical low melting point closing member is effectively closed.

According to a fifth aspect of the present invention, the disk-shaped low melting point closing member hermetically covers the surface of the glass plate around the hole obliquely held by the support for the solder for the kiln with a box. In this state, when suction is performed by an exhaust pipe connected to the box, air in the intermediate layer can be exhausted through the oblique disk-shaped low-melting point closing member, and the heating section is externally connected to the low-melting point closing member. Pressing can cause blockage, so that there is an effect that efficient work can be performed with a small number of steps.

If the heating section has a flat pressing surface, there is an effect that the surface closed by the disk-shaped low melting point closing member can be formed flat.

When the heating unit is pressed against the cylindrical low-melting point closing member or the disc-shaped low-melting point closing member from outside by using an expandable body that works with a fluid without using a power source such as a motor or a solenoid, hot air is generated. In a high temperature atmosphere such as in a circulating furnace, there is an effect that the device can be used stably without causing a failure.

Further, when the intermediate layers of a plurality of double glazings placed on the multi-stage shelves are evacuated at the same time, an extremely high working efficiency can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of an apparatus used in the method of the present invention.

FIG. 2 is a side sectional view showing the first step of the method of the present invention.

FIG. 3 is a side cross-sectional view of a closed portion of a double glazing in which an intermediate layer has been evacuated by the method of the present invention.

FIG. 4 is a side sectional view showing an example in which a notch is formed at an inner end of a cylindrical low melting point closing member.

FIG. 5 is a side sectional view showing an example of a cutout having a shape different from that of FIG. 4;

FIG. 6 is a side sectional view showing another example of the apparatus used in the method of the present invention.

FIG. 7 is a view taken along the line VII-VII in FIG. 6;

FIG. 8 is a side cross-sectional view of a closed portion of a double-layer glass in which an intermediate layer has been evacuated by the apparatus of FIG. 6;

FIG. 9 is a perspective view showing still another example of the apparatus used in the method of the present invention.

FIG. 10 is a longitudinal sectional view showing an example of a conventional method of exhausting an intermediate layer of a double-glazed glass.

FIG. 11 is a side sectional view of a closed portion of a double glazing in which an intermediate layer is evacuated by a conventional method.

[Explanation of symbols]

 1, 2 glass plate 7 hole 7a step 19 through hole 20 cylindrical low melting point closing member 20a notch 21 box 22 exhaust pipe 29 heating section 29a pressing recess 29b pressing flat surface 31 first elastic body 32 second Telescopic body 35 Mount 36 Support column 37 Shelf 41 Disc-shaped low melting point closing member 42 Support

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichi Harada 1-1-1, Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Within Asahi Glass Co., Ltd. (72) Inventor Takahiro Murakami 1150 Hazawacho, Kanagawa-ku, Yokohama-shi, Kanagawa Asahi Glass Co. Inside

Claims (7)

[Claims] 1. A kiln body for allowing air in an intermediate layer to be sucked from the outside into a hole formed in one of a pair of parallel glass plates having a sealed peripheral portion and an intermediate layer formed therein. A low melting point closing member formed of solder is provided, and after a predetermined degree of vacuum is achieved by suction of air in the intermediate layer, the end of the low melting point closing member is heated and melted to close the hole. Method for producing a double-glazed glass. 2. A method according to claim 1, further comprising the step of: sucking air in the intermediate layer through a hole formed in one of a pair of parallel glass plates having an intermediate layer formed therein with the periphery thereof sealed therein, and In a state where the degree of vacuum is achieved, a disc-shaped low melting point closing member formed by solder for a kiln is pressed, and the hole is closed by heating and melting the low melting point closing member. Multi-layer glass manufacturing equipment. 3. A hole formed in one of a pair of parallel glass plates whose periphery is sealed and an intermediate layer is formed therein has a through hole at the center, and an inner end is formed of an intermediate layer. A low-melting-point closing member made of solder for a kiln fitted so that an outer end thereof protrudes slightly from the surface of the one glass plate; and a hole in which the low-melting-point closing member of the one glass plate is fitted. And a heating unit airtightly covering the periphery of the container, an exhaust pipe connected to the box, and a heating unit supported by the box and pressed against an outer end of the low melting point closing member. An apparatus for producing a double-glazed glass. 4. The double-glazing apparatus according to claim 3, wherein the heating section has a pressing recess having a conical shape. 5. A step formed by enlarging the outside diameter of a hole formed in one of a pair of parallel glass plates having a sealed periphery and an intermediate layer formed therein. Part, a disc-shaped low-melting-point closing member made of solder for a kiln having a thickness fitted onto the step and having an outer surface slightly protruding from the surface of the one glass plate, and the disc-shaped low-melting point A support made of a solder for a kiln which is disposed between a part of the outer periphery of the closing member and the step portion to hold the low-melting-point closing member obliquely and thereby connect the intermediate layer to the outside, and the one glass A box that hermetically covers around the hole in which the disc-shaped low-melting point closing member is arranged, an exhaust pipe connected to the box, and a disc-shaped low-melting point closing member supported by the box. A heating device adapted to be pressed against an outer surface. 6. A heating section slidably supported by a box,
6. An apparatus for producing a double glazing according to claim 3, further comprising: an actuator for moving the heating section toward and away from the low melting point closing member by supplying and discharging a fluid. 7. A shelf for mounting a pair of parallel glass plates provided in multiple stages on a column attached to a gantry and having a sealed periphery, and mounted on the column in a rotatable manner on the column and mounted on the shelf. 7. The double-glazed glass manufacturing apparatus according to claim 3, further comprising: a box that can protrude and disappear on the surface of the placed glass plate.