JPH0346154Y2 - - Google Patents

Description

[Detailed description of the invention] a. Industrial application field This invention is suitable for applications such as building windows where dew condensation is likely to occur,
This invention relates to double-glazed glass used in refrigerator/freezer case windows, etc.

b. Prior Art For example, double-glazed or triple-glazed double-glazed glass is usually used for the opening windows of refrigerated and refrigerated storage cases. These double-glazed glasses have conductive processing applied to the inside of the glass facing outside the refrigerator, or a conductive processed film is bonded to the glass via adhesive, and the conductive processed layer For example, by providing conductive paste electrodes and current-carrying lead wires, the current-carrying glass is heated to prevent dew condensation.

c Problems that the invention aims to solve Usually, in the case of double-glazed glass, a conductive paste is applied to the conductive processed layer, dried to form an electrode, and a current-carrying lead wire is glued onto the electrode. It is manufactured by passing through a spacer used to hold the layers, taking out the lead wire to the outside, and finally sealing the area around the spacer with a sealant. Problems with these manufacturing processes are as follows.

The first point is that a conductive paste is applied to the conductive processed layer to form an electrode, but it is difficult to apply it uniformly with a good appearance, and it takes time and effort.Also, it takes time to dry the paste, which reduces productivity. That's a bad thing. When a screen printing method was used to solve the former problem, it was difficult to process a large number of sheets within the time it took for the paste to harden. Regarding the latter, there is no quick-drying conductive paste commercially available, and if the paste dries too quickly, it becomes difficult to apply the electrode.

The second point is that the electrical lead wire is glued onto the above electrode, but the adhesion between the lead wire and conductive paste is weak, and if it is glued to the electrode on the conductive processed film with solder, etc. There are problems such as melting of the film, and furthermore, the lead wires and electrodes are within the field of view visible from outside the refrigerator, which is unfavorable in terms of appearance, and there is also the disadvantage that the range in which the products inside the refrigerator can be seen is narrowed.

The third point is that when the electrical lead wire is passed through a spacer and taken out to the outside to seal the end of a thiocol-based sealant, hot-melt butyl rubber-based sealant, etc., if the lead wire is pulled strongly, for example, the conductivity In the case of processed films, the disadvantage is that the film peels off from the glass, making it unusable as a commercial product.

d. Means for Solving the Problems The purpose of the present invention is to provide double-glazed glass that does not have the above-mentioned problems and has good productivity. That is, the present invention provides a double-glazed glass having a conductive glass or a conductive film in which electricity is applied to the conductive glass or conductive film.
A T-shaped electrode made of metal foil is arranged on opposite sides of the conductive glass or conductive film so that its protrusion is on the outside, and the electrode and the conductive glass or film are connected to each other to make the conductive glass or conductive film conductive. After joining with paint or conductive adhesive, a spacer with at least opposite sides electrically insulated is arranged on the straight part of the electrode, and the protruding part of the T-shaped electrode and the lead wire are joined to the outer surface of the spacer. It is characterized by the fact that

The details of the present invention will be explained below.

The spacer used in the present invention may be made of metal such as aluminum or iron, or plastic, as long as it has sufficient durability and strength such as light resistance and heat resistance.

A hole is provided in the spacer for soldering the lead wire and the T-shaped electrode. Since electricity flows through the spacer, the spacer on the opposite side located above the electrode is
Must be electrically insulated from the side spacers. Therefore, for example, a frame structure is adopted in which the corner members are made of plastic rather than metal, and each side of the spacer has a distance of about 2 to 5 mm via the corner members.

Each side of the spacer has a hollow structure with an opening, and a desiccant such as silica gel or molecular sieve is used in the spacer as is conventionally known.
By adhering the outer periphery of the spacer with a sealant, an electrically conductive double-glazed glass having a sealed space between the glass plates can be obtained.

Next, the T-shaped electrode, which is a feature of the present invention, has a shape that consists of a straight part that is connected to conductive glass or a conductive film, and a protrusion that extends laterally from the straight part to the outside of the spacer for connecting lead wires. It is an abbreviation for an electrode, and is made of metal foil such as gold, silver, copper, nickel silver, or stainless steel, and its thickness is preferably 100 μm or less, and a material that does not deteriorate with a thiol-based sealant is preferably used.

The T-shaped electrode may be formed by punching, or may be formed into a T-shape using two pieces of metal foil of different lengths by soldering or the like. The width of the T-shaped electrode is preferably designed in accordance with the current value to be applied.

Further, the straight part of the T-shaped electrode may be provided on the conductive surface of conductive glass or a conductive film, or may be provided at a slight distance from the conductive surface, but if it is too far away, the T-shaped Since the amount of conductive paste or conductive adhesive used to join the electrode and conductive surface increases, making processing difficult, it is preferable to place the electrodes and conductive surfaces as close together as possible.

From a work point of view, it is more preferable for the T-shaped electrode to have a pressure-sensitive adhesive or adhesive coated on one side. or,
Conductive metal powder is mixed in the adhesive or adhesive, and if it has sufficient conductivity (specific resistance of 1×10 ^-3 Ω・cm or less), it can join the T-shaped electrode and conductive surface described above. This is a preferable embodiment because it eliminates the need to use conductive paint or conductive adhesive for the conductive surface. It must be connected throughout. The overlapped width is 1mm
It is preferable that there be more than one.

The effect of this invention is that it not only solves the above-mentioned problems, but also allows for extremely high efficiency production because the edges can be sealed at once by stacking several layers of double-glazed glass that have not yet been edge-sealed. . In this case, a molecular sieve is particularly effective as a desiccant.

Of course, the present invention uses not only a double or triple layer of glass-glass, but also an appropriately selected light-transmitting conductive processed film suspended parallel to the glass through an air space. may have been done. This is a preferable embodiment from the viewpoint of energy saving and reduction of window weight.

Next, an embodiment of the present invention will be described with reference to the drawings, but this is just an example of the present invention, and the present invention is not limited thereto.

FIG. 1 is an overall plan view of the embodiment, FIG. 2 is a side sectional view thereof, and FIG. 3 is an enlarged view of the corner portion of the spacer.

What is shown is an example of a rectangular double-glazed glass suitable for windows, which is made of two glass plates 1 and 1' facing each other, and is obtained in the following manner.

A conductive film 2 on which a conductive layer is laminated is bonded onto a glass plate 1 on the lower side in the figure so that the conductive layer is on the upper side in the figure. The conductive film 2 may be a commercially available transparent conductive film or a commercially available transparent conductive film.
Films having both electrical conductivity and selective light transmittance, which are known from Japanese Patent Laid-open No. 33575 and Japanese Patent Application Laid-Open No. 11804/1984, can be used.

Next, the straight portions of the T-shaped electrodes 9, 9' having straight portions approximately equal in length to the width of the conductive film 2 are placed on the glass plates 1, 1' with a slight gap between them. It is fixed with double-sided adhesive tape, etc. At this time, the protruding portions 9a of the T-shaped electrodes 9, 9'
are directed toward the outside, specifically, toward the sides of the glass plates 1, 1'. Further, a conductive paint 3 is applied and dried for electrical connection between the T-shaped electrodes 9, 9' and the conductive film 2.

A spacer 4 is then glued onto the glass plate 1 and the conductive film 2. The spacer 4 includes a T-shaped electrode 9 for supplying electricity to the conductive film 2,
9', each side member 4a, 4b, 4c, 4d has a hollow structure with a C-shaped cross section, and is made of electrically insulating plastic so that the opening 4f is inside the frame. Connected by a hook-shaped corner member 6 at each side member 4a, 4b, 4c, 4d.
The frame members are electrically insulated from each other.
As shown in FIG. 3, the corner member 6 is provided with a protrusion 6a that protrudes from the corner in the direction of each side by about several mm so that the side members 4a and 4b do not come into contact with each other at the corner. Further, the hollow portions of the side members 4a and 4b of the spacer 4 are filled with a desiccant for dehumidifying the sealed space. The spacer 4 includes opposing side members 4a and 4c.
are attached to the T-shaped electrodes 9, 9' at opposite ends of the conductive film 2 using a commercially available insulating double-sided adhesive tape 5 or the like. Note that the length of the conductive film 2 in the direction between the side members 4a and 4c is approximately the outer length of the spacer 4, so that the side member 4
The length in the direction between b and 4d is set to be slightly smaller than the inner length of the spacer 4 to ensure electrical insulation.

Then, the protruding portions 9a of the T-shaped electrodes 9, 9',
9'a is bent along the outer walls of the side members 4a, 4c of the spacer, and fixed to the outer walls with the double-sided adhesive tape 10 described above. Next, the electrical lead wire 7 is guided through the side members 4a, 4c to the joint parts 11, 11' as shown in the figure, and the protruding parts 9a, 9'a of the electrodes are connected with solder or conductive adhesive.
connected to.

Next, the above-mentioned double-sided adhesive tape 12 is adhered to the upper surface of the spacer 4, and the upper plate glass 1' in the figure is attached.
are overlapped and fixed with adhesive.

Finally, the outer periphery of the spacer 4 is sealed with a sealing material 8. Through the above process, an electrically conductive double-glazed glass consisting of two glass plates having a sealed space of a predetermined thickness between them is obtained. As shown in the figure, when the lead wire 7 is connected to the power source P, a current flows from the lead wire 7 to the T-shaped electrode 9 - the conductive layer of the conductive film 2 - the T-shaped electrode 9'. Since almost the entire surface of the lighting section inside the spacer 4 is electrically heated uniformly, it is possible to reliably prevent or eliminate the occurrence of dew condensation. Further, it is clear that the various effects described above can be obtained by this configuration.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of the embodiment, FIG. 2 is a side sectional view thereof, and FIG. 3 is an explanatory view of the corner portion of the spacer. 1, 1'... plate glass, 2... conductive film,
4... Spacer, 7... Lead wire, P... Power supply.

Claims (1)

[Scope of utility model registration request] Has conductive glass or conductive film,
In double-glazed glass in which electricity is applied to the conductive glass or conductive film, a T-shaped electrode made of metal foil is placed on the opposite side of the conductive glass or conductive film so that the protruding portion thereof is After bonding the electrode and the conductive glass or film with a conductive paint or conductive adhesive, a spacer whose at least opposite sides are electrically insulated is placed on the straight part of the electrode. 1. A double-glazed glass, characterized in that a protrusion of a T-shaped electrode and a lead wire are joined to the outer surface of the spacer.