JPH0521139A - Decorative laminated composite sheet - Google Patents

Abstract

PURPOSE:To allow electrodes to be connected in a composite sheet to leads to a power supply to avoid spoiling the beauty of the sheet and to improve the reliability and safety of connections. CONSTITUTION:Driven nuts are driven in a base 2 in advance and are free from corrosion and preferable because they are made of plastic. A machine screw 18 is fitted in each driven nut 17 via a cable terminal 19. A connection between electrode and machine screw is made for example by pushing in a spring coil 22. A flat dish-like metal fitting is attached to the tip of the spring coil 22 and the bottom surface of the metal fitting 21 is made into contact with the electrode 14. This constitution improves the reliability and safety of connections.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite board using a decorative board having an exothermic property.

[0002]

2. Description of the Related Art Conventionally, as a decorative plate having heat generation,
(1) A synthetic resin film coated or printed with a resistance ink film for heat generation, (2) a metal material having a high resistance such as a nichrome alloy, and (3) a so-called sheet heating element such as carbon fiber mixed paper. It is used. An electrode made of a metal foil is usually arranged on these sheet heating elements, and the decorative plate can be heated by energizing the electrodes.

By the way, various methods have been studied and implemented for the connection between the electrode and the power source, but all of them are wasteful in space and impair the aesthetics of the decorative composite board, and are safe. And it was insufficient in terms of certainty.

[0004]

DISCLOSURE OF THE INVENTION The present inventor has found that the appearance of a composite board using a decorative board having heat generation is not impaired,
Various studies have been conducted on a method for safely and reliably connecting the electrode of the heating element and the power supply, particularly, a method of connecting the electrode exposed on the back surface side of the decorative plate to the lead wire to the power supply through the back surface of the substrate, and the present invention has been achieved. It is a thing.

[0005]

Means for Solving the Problems The present inventor has proposed a decorative composite plate obtained by bonding a thermosetting resin decorative plate having a sheet-like heat generating element having electrodes between layers to a substrate such as plywood or particle board. The electrode is exposed on the back side of the decorative plate.
The decorative composite board is characterized in that it is connected to a lead wire to a power source by a driving nut and a screw through the back surface of the board.

In the present invention, the thermosetting resin is a melamine resin, a phenol resin, a polyester resin, a diallyl phthalate resin or the like, which is coated or impregnated with paper, cloth, etc. A thermosetting resin decorative board is obtained by molding. In particular, when a decorative paper impregnated with a melamine resin is used as the surface layer, the color and pattern can be beautifully expressed, and the physical properties such as hardness and abrasion are excellent, and it is suitable as a decorative board used in the present invention. ..

As the sheet heating element used in the present invention, a synthetic resin film coated or printed with a resistance ink film for heating as described above, a metal material having a high resistance such as a nichrome alloy, or a carbon fiber mixed paper is used. is there. Of these, a carbon fiber mixed paper obtained by mixing carbon fibers and pulp can be laminated and molded integrally with a thermosetting resin-impregnated paper cloth, and the heat generation temperature distribution is relatively uniform, which is preferable.

If the sheet heating element is made one size smaller than the thermosetting resin-impregnated paper cloth, the heating element will not be exposed from the end of the decorative plate after molding, and troubles such as earth leakage can be prevented in practical use. be able to.

The electrodes attached to the sheet heating element are copper,
A metal foil having good conductivity such as aluminum is selected, and the thickness thereof is usually 10 to 60 μm. This metal foil is coated with a conductive adhesive or a conductive pressure-sensitive adhesive, usually 5 to 20 mm
After slitting into a tape width, it is attached to a sheet heating element. It is preferable to dispose the electrodes at the ends of two opposite sides of the planar heating element for uniform heat generation on the entire surface, but other positions may be provided if necessary.

There are mainly the following two methods of exposing the electrodes on the back surface of the decorative plate.

[1] As shown in FIG. 1, a thermosetting resin-impregnated paper cloth (15) located below the electrodes (14) of the sheet heating element (13) is used for electrode extraction before forming the decorative plate. The holes (16) are opened and the electrodes are exposed on the back surface of the decorative plate (1) by molding.

[2] As shown in FIG. 2, after forming the decorative plate, a hole (16) reaching the electrode surface from the back surface is opened to expose the electrode (14).

Next, when the decorative plate (1) is attached to a substrate (2) such as plywood or particle board, a hole (3) is made in this substrate in advance, and after bonding, the composite as shown in FIG. Take out the electrode from the back of the decorative plate and connect it to the power supply. When connecting the electrode and the lead wire to the power source, there is a method by soldering, but a method by a driving nut and a screw as shown in FIG. 4 is more excellent in workability and connection reliability.

In FIG. 4, the driving nut (17) is to be driven into the substrate (2) in advance, and may be made of metal or plastic, but is made of lightweight plastic without fear of corrosion. Is preferred. Screw (1
For 8), crimp the end (19) of the lead wire and pass it through this screw, and then insert this into the nut.
The electrode surface and the screw are connected, for example, by pushing the spring-shaped coil (22) at the tip of the screw, and a flat plate-shaped metal fitting (21) is attached to the tip of the spring-shaped coil (22). The bottom surface of the metal fitting (21) is the electrode (14)
The connection will be more secure if the contact is made.

[0015]

The decorative composite board in which the exothermic decorative board according to the present invention is bonded to the substrate has a structure in which the electrodes are connected to the lead wires to the power source, so that the decorative composite board does not waste space. It does not spoil the aesthetics. Further, the decorative composite plate of the present invention has excellent workability and high reliability and safety of connection because the electrode and the lead wire to the power source are connected by the driving nut and the screw. If this decorative composite plate is incorporated into a floor, a wall surface, etc., it can be used as a heating panel, and can also be used in various industrial fields, such as processes requiring heating and drying.

[Brief description of drawings]

FIG. 1 shows a method of exposing electrodes on the back surface of a decorative plate,
(A) is a side cross-sectional view of the decorative plate before molding, (B) is a side sectional view of the decorative plate, and (C) is a rear view of the decorative plate.

2A and 2B show another method of exposing electrodes on the back surface of a decorative plate, where FIG. 2A is a side sectional view of a decorative plate before drilling, and FIG. 2B is a side sectional view after drilling.

3A and 3B are a perforated substrate and a decorative composite plate, FIG. 3A is a perspective view of the substrate, and FIG. 3B is a side sectional view of the decorative composite plate.

FIG. 4 is a side sectional view of a decorative composite plate with electrodes taken out from the back surface.

[Explanation of symbols]

 1 Decorative Plate 2 Substrate 3 Hole 11 Thermosetting Resin Impregnated Paper (Surface Layer) 12 Thermosetting Resin Impregnated Paper (Core Layer) 13 Sheet Heating Element 14 Electrode 15 Thermosetting Resin Impregnated Paper (Core Layer) 16 Hole 17 Driven nut 18 Screw 19 Lead wire end 20 Split washer 21 Flat plate metal fitting 22 Spring coil

Front page continuation (72) Inventor Masafumi Nakamura 1-2-2 Uchisaiwaicho, Chiyoda-ku, Tokyo Sumitomo Bakelite Co., Ltd.

Claims (1)

Claim: What is claimed is: 1. A decorative composite plate obtained by laminating a thermosetting resin decorative plate having a sheet-like heat generating element having electrodes between layers to a substrate such as a plywood or a particle board. A decorative composite plate characterized in that the electrode exposed on the side is connected to a lead wire to a power source through a driving nut and a screw through the back surface of the substrate.