JP2516525Y2 - Fever composite board - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-generating composite plate.

[0002]

2. Description of the Related Art Conventionally, in order to improve productivity as a heat-generating composite plate, for example, as shown in FIG. 3, urethane is provided in an internal space 9 formed between two plate-shaped members 1 and 2 facing each other. It is conceivable that a heating resin 7 disposed in the internal space 9 is pressed and held against one of the plate-shaped bodies 1 by a foamed resin 11 which is filled with a foamable resin liquid such as resin and foamed and solidified. There is. In such a heat-generating composite plate, since the heat of the heat-generating body 7 is uniformly diffused to the surface side, a soaking plate 6 such as an aluminum plate is provided between the plate-shaped body 1 on one side and the heat-generating body 7. Has been. Further, a heat conductive sheet (not shown) such as an aluminum foil may be arranged on the back surface of the heating element 7 in order to hold the heating element 7 and further improve heat diffusion.

[0003]

However, in the above-described heat-generating composite plate, when the foamable resin liquid foams and solidifies to form a foamed resin, it contacts the soaking plate 6 or the heat conductive sheet among the foamed resin. A so-called skin layer, which is an unfoamed or low-foamed dense layer, is formed on the portion. Therefore, when the heating element 7 is heated by energizing it after being integrated as a heat-generating composite plate, gas is generated from the foamed resin that has not been foamed or has been solidified with low foaming.
Next foaming occurs, but since the foamed resin and the heat equalizing plate are in close contact with each other, there is no escape place for the gas. As a result, the generated gas accumulates inside the foamed resin 11 and the foamed resin 11 expands and pushes up the plate-shaped body 1 through the heat equalizing plate 6, so that unevenness occurs on the surface of the heat-generating composite plate, There was a problem that the form 1 and the like peeled off.

In view of the above-mentioned problems, the heat-generating composite plate according to the present invention prevents the formation of a skin layer on the foamed resin in contact with the heat equalizing plate or the heat-conducting sheet to prevent secondary foaming due to energization. An object of the present invention is to provide a heat-generating composite plate capable of preventing the occurrence of unevenness due to the gas generated from the resin and the peeling of plate-like bodies and the like.

[0005]

In order to achieve the above-mentioned object, the heat-generating composite plate according to the present invention has crosspieces arranged on at least both side edges of the facing surfaces of two plate-shaped members facing each other. The heating element arranged in the internal space is pressed and held by the foamed resin that is foamed and solidified in the internal space, on the heat equalizing plate that forms the internal space and is in contact with the inner surface of one of the plate-shaped bodies. In the heat-generating composite plate, the soaking plate and the heating element are configured by partitioning the foamed resin with an air-permeable sheet. Further, among the facing surfaces of the two plate-shaped bodies facing each other, crosspieces are arranged at least on both side edge portions to form an internal space, and a soaking plate contacting the inner surface of any one of the plate-shaped bodies, In a heat-generating composite plate in which a heat generating element arranged in the internal space is pressed and held by a foamed resin that has been foamed and solidified in the internal space via a heat conductive sheet, the heat conductive sheet is breathable from the foamed resin. The sheet may be divided into sheets.

[0006]

Therefore, according to the present invention, since the breathable sheet is interposed at the portion where the foamed resin comes into contact with the heat equalizing plate,
Unlike the conventional example, a dense skin layer is not formed on the surface of the foamed resin, and after lamination and integration, expansion due to secondary foaming due to heat generated when electricity is applied can be prevented, and a small amount of gas is generated from the foamed resin. However, the gas is discharged from the breathable sheet layer to the outside.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, of the heat-generating composite plates according to the present invention, an embodiment of the heat-generating composite plate according to claim 2 is shown in FIGS.
Will be described with reference to the accompanying drawings. The heat-generating composite plate according to the present embodiment has two plate-shaped members 1 and 2 facing each other, and crosspieces 3 and 4 provided on both long-side edges of the facing surfaces of the plate-shaped members 1 and 2.
And a temperature sensing device 5, a heat equalizing plate 6 is arranged on the upper surface, and a heat conductive sheet 8 is arranged on the lower surface, and inside the internal space 9 formed by the plate-shaped members 1 and 2 and the crosspieces 3 and 4. The heating element 7 provided, the breathable sheet 10 disposed on the lower surface of the heat conductive sheet 8, and the plate-like body 2 and the breathable sheet 10 are filled between them and foamed and solidified to form the plate-like shape. It comprises a foamed resin 11 for pressing and holding the heating element 6 and the like against the body 1.

Examples of the plate-shaped members 1 and 2 include plywood having a thermal conductivity of 0.5 (Kcal / m · h · ° C.) or less, particle board, and foamed resin plate. The plate-shaped body 1
For this, a cross-section having a substantially U-shape in which post members 3 and 4 described later are integrated may be used.

As the crosspieces 3 and 4, those having air permeability and a thermal conductivity of 0.5 (Kcal / m · h · ° C) or less are preferable. For example, a bar made of a laminated material in which fiber directions are arranged in parallel. , A bar made of plywood in which the fiber directions of a single plate are crossed, or a bar made of a porous calcium silicate material. The crosspieces 3 and 4 may be provided on at least both edges of the long sides of the plate-shaped bodies 1 and 2, but may be provided on all of the peripheral edges.

Examples of the heating element 7 include a wire heater and a heat wire printed board. Since the heat equalizing plate 6 such as an aluminum plate arranged on the upper surface of the heating element 7 diffuses the heat generated by the heating element 7, even if the plate 1 has a low thermal conductivity, 1 can be heated uniformly. The heating elements 7 are attached to the upper surface of the heat conductive sheet 8 at predetermined intervals.
The heat conductive sheet 8 has, for example, a thermal conductivity of 10 (Kcal / m · h ·
(° C.) Or higher, which is made of smooth and easily deformable aluminum foil or the like, diffuses reaction heat of the foamable resin liquid described later and protects the temperature sensing device 5 provided in the internal space 9 from an abnormal temperature rise. It is a thing.

In this embodiment, a relatively thick wire heater is used as the heating element 7, but the foamed and solidified foamed resin 11 presses the heat conductive sheet 8 along the outer shape of the wire heater. Since it is deformed, the heating element 7 and the temperature sensing device 5 are surely pressed against the plate-shaped body 1 on the front surface side and are not separated during use. Further, since it is not necessary to make the heat-conducting sheet 8 concave in advance, productivity and storability are good.

The breathable sheet 10 is in close contact with the lower surface of the heat conductive sheet 8 so that a skin layer is not formed on the foamed resin 11 which will be described later. Even if the secondary foaming
The inside of the foamed resin 11 can be prevented from being filled with gas,
Further, it is for forming a gas vent layer for discharging the gas generated from the foamed resin 11 to the outside, and is made of, for example, 20-60 g / m ² of Japanese paper, non-woven fabric, etc. Is a sheet-like material formed randomly in the vertical and horizontal directions.

Examples of the foamable resin liquid forming the foamed resin 11 include known foamable urethane resins, ethylene resins, styrene resins, phenol resins and the like.

In the heat-generating composite plate, the plate-like body 1 on the front surface side is turned upside down, crosspieces 3 and 4 are provided at both edges of the long sides, and a uniform heat distribution provided between the crosspieces 3 and 4 is provided. The heat generating element 7 and the temperature sensing device 5 are arranged on the plate 6, and the heat conductive sheet 8 and
The assembly is completed by sequentially covering with the breathable sheet 10, injecting and filling the foamable resin liquid thereon, then assembling the plate-like body 2 and foaming and solidifying the foamable resin liquid. Of course, the openings formed by the short-side ends of the plate-shaped bodies 1 and 2 may be closed by a jig (not shown).

Since plywood is used for the crosspieces 3 and 4 in this embodiment, even if gas is generated when the foamable resin liquid is foamed and solidified in the internal space 9, the gas is generated from the voids of the crosspieces 3 and 4. The gas is expelled appropriately. Therefore, there is an advantage that it is not necessary to provide a special gas vent hole.

It should be noted that, through an injection hole (not shown) provided in the plate-shaped body 2, an internal space 9 formed by previously assembling the plate-shaped bodies 1, 2, the crosspieces 3, 4 and the heating element 7 is formed. The foamable resin liquid may be injected and filled to foam and solidify. Although one example of the heat-generating composite plate according to claim 2 has been described in the above embodiment, the heat-conducting sheet 8 is not always necessary, and in claim 1, the heat-generating body 7 is provided on the back surface of the heat equalizing plate 6. May be temporarily fixed and the foamed resin 11 may be integrated,
Alternatively, the heating element 7 may be attached to the breathable sheet 10 such as a non-woven fabric in advance and integrated with the foamed resin 11, so that the breathable sheet 10 is brought into direct contact with the heat equalizing plate 6.

[0017]

As is apparent from the above description, according to the heat-generating composite plate of the present invention, the breathable sheet is interposed between the heat equalizing plate or the heat-conducting sheet and the foam resin, and the surface layer of the foam resin is provided. A skin layer is prevented from being formed on the part and a gas vent layer is formed. That is, since the foamed resin does not directly contact the heat equalizing plate or the heat conductive sheet, the skin layer is not formed on the foamed resin. For this reason, after the lamination and integration, gas is less likely to be generated from the inside of the foamed resin when electricity is applied to heat the heating element, and even if gas is generated, it is discharged to the outside through the breathable sheet. Become. As a result, since the foamed resin does not expand, the heat-generating composite plate does not become uneven,
The plate-like body is not peeled off. Further, since the breathable sheet is arranged on the lower surface of the heating element, there is an effect that the sinking due to the load can be reduced and the disconnection of the temperature sensing device or the like can be prevented.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a heat-generating composite plate according to the present embodiment.

FIG. 2 is a cross-sectional view of a heat-generating composite plate according to this example.

FIG. 3 is a cross-sectional view of a heat-generating composite plate according to a conventional example.

[Explanation of symbols]

1, 2 ... Plate-like body, 3, 4 ... Cross member, 6 ... Soaking plate, 7 ... Heating element, 8 ... Heat conductive sheet, 9 ... Internal space, 10 ... Breathable sheet, 11 ... Foam resin.

Front page continuation (72) Inventor Ansuke Fukuman 1 Inaba, Inami-cho, Higashitonami-gun, Toyama Prefecture No. 1 Daiken Kogyo Co., Ltd. Kenken Kogyo Co., Ltd. (72) Inventor Masaki Kaneda 1 Ina No. 1 Inami, Inami-cho, Higashitonami-gun, Toyama Prefecture Daiken Kogyo Co., Ltd. (56) -62493 (JP, U)

Claims (2)

(57) [Scope of utility model registration request] 1. Of the facing surfaces of two plate-shaped members facing each other,
Arrange the crosspieces at least on both edges to form an internal space,
In a heat-generating composite plate for pressing and holding a heating element arranged in the internal space, with a foamed resin that has been foamed and solidified in the internal space, in a soaking plate that contacts the inner surface of one of the plate-shaped bodies, A heat-generating composite plate, characterized in that the soaking plate and the heating element are separated from the foamed resin by a breathable sheet. 2. Of the facing surfaces of two plate-shaped members facing each other,
Arrange the crosspieces at least on both edges to form an internal space,
A heating element arranged in the internal space is pressed and held by a foaming resin that has been foamed and solidified in the internal space via a heat transfer sheet on a heat equalizing plate that is in contact with the inner surface of one of the plate-shaped bodies. In the heat-generating composite plate, the heat-conducting sheet is partitioned from the foamed resin by an air-permeable sheet, which is a heat-generating composite plate.