JPH04203814A - Sheet heater and manufacture thereof - Google Patents

Abstract

PURPOSE:To cause a heating wire or a temperature sensing wire to be removably installed in respect to a main body of a heater by a method wherein a wiring pipe for inserting the heater wire or the temperature detection wire is installed, the wiring pipe is adhered at its predetermined position between a surface material and a thermal insulation material to form a main body and then the heating wire and the temperature detection wire are passed through the wiring pipe. CONSTITUTION:A base material 21 made of non-woven fabric or heat melting film or the like, for example, is placed above a wiring pipe 1 while the wiring pipe 1 being formed over a wiring jig 7 under its predetermined shape and they are heat pressed and pressurized, resulting in that a heat melting covering layer 11 of the wiring pipe 1 and the base material 21 are melted to form a wiring device 2. Then, the wiring device 2 is placed between a surface material 3 and a heat insulating material 4 and they are integrally adhered to each other. A heating wire 5 or a temperature detection wire is inserted into the wiring pipe 1 of the produced adhered body so as to get a main body of a heater. Accordingly, since the heating wire can be removably set from a main body of the heater, its repairing and replacement can be performed in the event of occurrence of trouble in the heater without damaging the main body of the heater.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the main body structure and manufacturing method of a planar heating device such as an electric carpet.

2. Description of the Related Art Conventionally, the main structure of this type of electric carpet was as shown in FIGS. 8 and 9, for example, according to the construction method shown in Japanese Patent Publication No. 59-30407. That is, the heating wire 5 and the temperature detection wire 6 are arranged in a meandering manner.
was integrated with the heat-fusible film layer 22 to form the heater unit 20, interposed between the surface material 3 and the heat insulating material 4, and integrated by thermocompression bonding.

Problems to be Solved by the Invention However, with such a structure, it is difficult to pull out the heating wire 5 and the temperature detection wire 6 from the body of the heating device once they have been bonded. There is a problem in that if the temperature detection line 6 breaks down, it cannot be repaired. Furthermore, when performing integral adhesion with the surface material 3 and the heat insulating material 4,
Since there is a thermal adverse effect on the heat generating wire 5 and the temperature detection wire 6, there is also a problem that there are restrictions on process conditions such as heating conditions and pressurizing conditions, and bonding cannot be performed in a short time.

Therefore, the first object of the present invention is to solve the above-mentioned problem, and to enable the heat generation wire and the temperature detection wire to be detachably attached to the body of the heating device.

The second object is to provide a manufacturing method that allows the surface material heater unit heat insulating material to be integrally bonded in a short time.

Means for Solving the Problems and In order to achieve the above object, the present invention provides a wiring pipe into which a heating wire, a temperature detection wire, etc. are inserted,
The wiring pipe is glued at a predetermined position between the surface material and the heat insulating material to form the main body, and then the heating wire and the temperature detection wire are passed through the wiring pipe to complete the heating device main body. This is what I did.

In addition, the surface material wiring pipe and the heat insulating material are stacked together without any heating wires or temperature detection wires being wired, and are bonded together in a short time by forced heating by applying a high frequency electric field.

Function The planar heating device of the present invention has the above-mentioned configuration, so that even after the heating device main body is formed, the wiring pipe, heating wire, temperature detection wire, etc. can be attached and removed.

In addition, when bonding together, heating can be performed by applying a high frequency electric field before inserting the heating wire.

Example An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the wiring pipe I has a heat-fusible coating layer 11 made of polyethylene on the outside, and a flexible coating layer 11 made of soft PVC, silicone rubber, polyethylene, nylon, etc. on the inside. This is a so-called double structure, in which the tube 12 is provided with a tube 12 having a diameter. Then, this wiring pipe 1 is fixed in a predetermined position by the method described below. That is, the second
As shown in the figure, first, the wiring pipe 1 is shaped into a predetermined shape on the wiring jig 7, and then a base material 21 made of, for example, nonwoven fabric or heat-fusible film is placed on top of it. When they are pressed with a hot press, the heat-fusible coating layer j1 of the wiring pipe I and the base material 21 are fused together, and the wiring unit 2 as shown by the third jump is constructed.

Next, as shown in FIG. 4, the wiring unit 2 is placed between the surface material 3 and the heat insulating material 4 and they are bonded together. One method for this is to use a water-soluble adhesive and force dry it. For example, apply a vinyl acetate-based water-based emulsion type adhesive to the surface material 3 side and the insulation material 4 side, sandwich the wiring unit 2 between them, press them together with a roller, and then force dry the adhesive. Let it adhere. For forced drying, hot air drying is generally the method, but dielectric heating is a method for efficiently drying in a short time. The principle of this is shown in Figure 5. By applying a high-frequency electric field in the vertical direction between the surface material 3 and the heat insulating material 4, the dielectric material in the adhesive generates heat, and this heat causes the adhesive to become heated. The water content evaporates and dries. Here, the larger the magnitude of the high-frequency electric field applied, the greater the heating of the adhesive, and the stronger the bonding can be performed in a short time. The wire 6 is inserted to configure the body of the heating device.

The method of inserting the heat generating wire 5 etc. into the wiring pipe I is as shown in Fig. 6, by using a thin thread 9 that has been inserted into the wiring pipe I in advance, and then placing it in the wiring jig described above. After a series of steps from heat pressing to integral adhesion, a heating wire is connected to -@ (position A in the figure) of the thin thread 9, and the other end of the thin thread 9 (position B in the figure) is connected to -@ of the thin thread 9 (position A in the figure). This is the method of inserting the heating wire 5 while pulling out the position.

Yet another method is to send in air. That is, one end of the wiring pipe 1 (position B in the figure) is evacuated, and the heating wire 5 etc. is inserted from the other end (position A in the figure).

Although the case in which there is one line in FIG. 6 is described, this is done to simplify demolding, and the same method can be adopted even when there is a plurality of lines.

In addition, in order to make it easier for the heating wire 5 to be inserted into the wiring pipe l, the wiring may be wired in a spiral shape as shown in FIG. 7, with the radius of curvature of the turn portion being as large as possible. As is clear from a comparison with the conventional wiring diagram shown in Fig. 10, most of the bends are 90 degree bends, so when inserting the wire, there is less friction with the inner wall of the wiring pipe 1. It is small and can be done relatively smoothly.

In the description of this embodiment, the case where the base material 21 is made of non-woven fabric has been described, but for example, an aluminum sheet laminated with polyethylene film on both sides may be used, and the processing of the wiring unit 2 is as described above. As in the case, integration can be performed by heat pressing. Also, surface material 3. Insulation material 4
The wiring unit 2 can be integrated by sandwiching the wiring unit 2 between them and hot pressing them from above and below.

Regarding the relationship between the heat generation vA5 and the temperature detection wire 6, from the viewpoint of simplifying insertion into the wiring pipe 1,
It is also possible to adopt a method of configuring a heat-sensitive heating line in which the heating wire 5 and the temperature detection line 6 are combined into a single wire.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the heating wire can be attached and detached from the body of the heating device, so if the heating wire breaks down, it can be repaired or replaced without damaging the body of the heating device. , it has major features not available in electric car vents up until now.

In addition, since the process of gluing the body of the warming device can be carried out without the heat-generating wire in place, if the body is forced to dry using dielectric heating and then bonded, it will generate heat if there is an object containing metal such as the heat-generating wire. Because of this, the strength of the electric field had to be lowered, but since there is no metal object, a sufficiently strong electric field can be applied, making it possible to shorten the bonding process time and increase the bonding strength.ヰ

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a wiring pipe according to an embodiment of the present invention.
Figure 2 is a diagram of the manufacturing method of the wiring unit, Figure 3 is a cross-sectional structural diagram of the wiring unit, Figure 4 is an exploded perspective view of the heating device itself, Figure 5 is a diagram of the principle of the dielectric heating method of this example, Part 6 is a partial sectional view of the main body of the heating device, Fig. 7 is a wiring pattern diagram, Part 8 is a sectional view of a conventional heater unit, Fig. 9 is a sectional view of the main body of a conventional heating device, Section 10 is the wiring pattern. 1...Wiring pipe, 2...Wiring unit, 3...Surface material, 4...Insulation material,
5... Heat generating wire, 8A, 8B... Dielectric heating electrode, 21... Base material. Name of agent: Patent attorney Akira Okaji and 2 other people - Pipe for Yamato Asashi! Figure 3 2- Interpretation 9L: L = t2/zII? -Woman Yu;t 3- Australia rudder t 4, -, yr! ! I: Material No. 4 fjA, 8f3, ~ Tao Hand - One use 1 effect L1 --- Fig. 5 5- Squirrel gland q- Thread A = Insertion of eaves IRc Aidamine B End of insertion of F gland pain figure 7

Claims (2)

[Claims] (1) A surface material, a wiring pipe, a heat-generating wire, and a heat insulating material are provided, and the former wiring pipe is formed into a predetermined shape, placed between the surface material and the heat insulating material, and bonded together. Also, a planar heating device configured by passing the heating wire through the wiring pipe. (2) A wiring pipe with a double structure consisting of a heat-fusible coating layer on the outside and a flexible tube on the inside is shaped into a predetermined shape, and a non-woven fabric or heat-fusible coating layer is placed on top of it. A base material made of a film or the like is placed, heat-pressed and fused to form a wiring unit, and the wiring unit is sandwiched between a surface material coated with an adhesive and a heat insulating material, and the wiring unit is sandwiched between the surface material and the heat insulating material. A method for manufacturing a planar heating device, which involves applying a high-frequency electric field to both surfaces of the material, bonding the materials by dielectric heating, and then passing the heating wire through the wiring pipe.