JPH0256888A - Electrically heated board - Google Patents

Abstract

PURPOSE:To prevent the leakage of a foaming body by providing peripheral walls around bottomed frame-shaped joint section forming members having joint section spaces at notch sections of a surface plate. CONSTITUTION:In the structure of an electrically heated board arranged with a heating body 7 on the back of a surface plate 1 and filled and foamed with a foaming body 4 in it, corners of the surface plate 1 provided on the outer surface are notched nearly into a rectangle, for example, and bottomed frame- shaped joint section forming members 3 are provided on the beck side. The joint section forming members 3 have frame-shaped peripheral walls and prevent a foaming body 4 from infiltrating into the joint section spaces 6 with the peripheral walls facing the foaming body 4 side. No gap is generated between the surface plate 1 and the joint section forming members 3 when the whole thickness A2 is kept constant, thereby no foaming body 4 leaks to the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electric heating board that uses electricity as a heat source when performing indoor radiant heating using floor heating panels, wall heating panels, etc.

(Prior Art) As shown in FIG. 7, in the conventional electric heating board, when forming the joint space 6 in a part of the surface plate l,
The filled part and the non-filled part of the foam 4 were separated by folding and the bottom member of the joint part was applied from the bottom surface.

This joint space is used when connecting lead wires of the heating element 7 or external electric wires.

(Problem to be Solved by the Invention) However, in such a configuration, the surface film is made of metal or a material having the same thermal conductivity as metal for the purpose of improving heat dissipation. When doing so, there is a large variation in the bending height A, and if you try to keep the overall thickness At constant when attaching the bottom member 3 of the tilted part to the surface FiI and injecting the foam 4, the tip of the surface slope bending part and the joint A gap 5a was formed between the foam and the bottom member 31, and the foam 4 often leaked into the joint space.

In order to prevent this leakage, a resilient leak prevention member 5 was inserted between the surface plate I and the bottom member 3 of the hinged portion, but the installation of the leak prevention member 5 takes time and is more reliable. In order to stop the foam 4 from leaking, many mice must be pushed in, which is disadvantageous in terms of cost.

Also, if a load is applied from above the joint cover 2, it will be received by the surface plate 1, so if there is a gap 5a, the overall thickness will be A! It also had the disadvantage that it changed.

Note that FIG. 8 shows a perspective view of FIG. 7.

However, when this electric heating board is used as a floor heating panel, multiple sheets are often installed as shown in Figure 9, especially when there is an uneven floor when used as a floor heating panel. Since this is extremely difficult, particularly high thickness accuracy is required.

The present invention has been proposed in view of the above, and its purpose is to provide an electric heating board that maintains the overall thickness with good precision and prevents leakage when foam is injected without installing a leakage prevention member. Our goal is to provide the following.

(Means for Solving the Problems) In the present invention, a heating element and a foam are provided on the back surface of the top plate,
and an electric heating board in which a part of the surface plate is cut out and the unfilled part of the foam is used as a joint space,
A bottomed frame-shaped joint forming member having a joint space is provided in the notch of the surface plate, and a circumferential wall erected around the joint forming member prevents leakage of the foam; A recess for accommodating the step-shaped protrusion formed at the cutout end of the surface plate is formed in a peripheral wall erected around the section forming member, and the outer end of the peripheral wall and the back surface of the surface plate are formed. or a joint part cover placed over the joint part forming member is brought into contact with a part of the peripheral wall to prevent the foam from reaching;
The above objectives have been achieved.

(Function) In the present invention, the bottom frame-shaped joint portion forming member has a foam leakage prevention function.

(Example 1) FIGS. 1 and 2 show a first example of the present invention. In this embodiment, in the structure of an electric heating board in which a heating element 7 for collecting heat is arranged on the back surface of the surface plate 1 and a foam 4 is injected and foamed inside, the surface plate 1 provided on the outer surface is The joint part forming member 3 is provided with a bottomed frame-shaped joint part forming member 3 on the back side, and the joint part forming member 3 has a frame-shaped peripheral wall, and a peripheral wall facing the foam body 4 side. In this case, if the joint part forming member 3 is made of a plastic molded product etc., the accuracy is good, so the overall thickness A Even if , is kept constant, the surface plate I
There is no gap between the joint forming member 3 and the foam 4, and therefore the foam 4 does not leak out.

In addition, the joint part forming member 3 is connected to the joint part cover 2.
Since it is covered and held, the thickness of the joint space 6 can also be made the same.

Furthermore, since there is no gap between the joint forming member 3 and the surface plate 1, the thickness will not change even if a load is applied to the notch of the surface plate 1.

(Embodiment 2) FIGS. 3 and 4 show a second embodiment of the present invention, and in this embodiment, on two sides of the peripheral wall of the joint forming member 3,
A groove-shaped recess 3a for accommodating a stepped surface plate protrusion 1a formed by bending the notched end of the surface plate l into an L shape.
It is characterized by the fact that it has been formed.

In this case, leakage of the foam 4 is stopped at the end 3c of the recess 3a, which is connected to the surface plate 1. Note that a protrusion 3b is formed on the joint space 6 side of the peripheral wall due to the recess 3a, and this protrusion 3b is able to resist the force from the direction B by hitting the end of the protrusion 1a of the surface plate 1. The joint forming member 3 is held. This protrusion 3b does not need to exist over the entire circumference of the notch, and the effect is the same even if it exists partially.Also, the protrusion 1a of the surface plate l and the recess of the joint forming member 3 3a does not need to be in contact.

Since the other configurations are the same as those in the first embodiment, the same members will be given the same reference numerals and detailed explanations will be omitted.

(Embodiment 3) FIGS. 5 and 6 show a third embodiment of the present invention. In this embodiment, notches 3a' are formed on two sides of the peripheral wall of the joint forming member 3 and at the outer edge of the upper surface to accommodate the step-shaped protrusion 1a formed at the notch end of the surface plate l. It has the following characteristics. This notch 3a1 is formed by cutting out the outer edge of the peripheral wall in an L-shape, and prevents leakage when the foam 4 is poured into the surface plate 1.
The structure is such that the protrusion 1a and the bottom surface of the notch 3a" come into contact and stop. Also, similarly to the second embodiment, the protrusion 3b of the joint forming member 3 is effective against the force in the direction B. Note that the joint space 6 does not necessarily need to be formed at the corner of the electric heating board, and may be formed at any position on the outer periphery of the surface plate.

(Effects of the Invention) As described above, according to the present invention, a heating element and a foam are provided on the back surface of a top plate, and a part of the top plate is cut out, and the unfilled portion of the foam is inserted into a joint space. In the electric heating board, a bottom frame-shaped joint forming member having a joint space is provided in the notch of the surface plate, and a peripheral wall erected around the joint forming member prevents leakage of the foam. A recess for accommodating the stepped protrusion formed at the notch end of the surface plate is formed in a peripheral wall erected around the joint forming member, and the outer end of the peripheral wall Since the leakage of the foam is prevented by bringing the joint part cover covered over the back surface of the surface plate or the joint space member into contact with a part of the peripheral wall, there is no need to take the conventional leakage prevention measures. It is easy to assemble as there is no need to do this.

In addition, since both the joint part cover and the surface plate are supported by the joint part forming member, the dimensions do not change when a load is applied from above. This prevents unevenness when used in floor heating panels, etc. It has the effect of being a good reader.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a main part of a first embodiment of the present invention, Fig. 2 is a perspective view of the same as above, Fig. 3 is a sectional view of a main part of a second embodiment of the invention, and Fig. 4 is a perspective view of the same as above. 5 is a sectional view of a main part of a third embodiment of the present invention, FIG. 6 is a perspective view of the same, and FIGS. 7 to 9 show a conventional example. l...Surface plate, 2...Joint part cover 3...
Joint part forming member, 4... Foam, 6... Joint part space, 7... Heat generating element. 114 4 Figure 7 Figure 7 Procedure amendment type (n4 November 4, 1988

Claims (2)

[Claims] (1) In an electric heating board that includes a heating element and a foam on the back surface of the top plate, a part of the top plate is cut out, and the unfilled part of the foam is used as a joint space, in which the notch in the top plate is provided. 1. An electric heating board, characterized in that a bottomed frame-shaped joint forming member having a joint space is provided in the portion thereof, and leakage of the foam is prevented by a peripheral wall erected around the joint forming member. (2) A heating element and a foam are provided on the back side of the top plate, and
In the electric heating board in which a part of the surface plate is cut out and the unfilled part of the foam is used as a joint space, a bottomed frame-shaped joint forming member having a joint space is provided in the cutout of the surface plate. , a recess for accommodating the step-shaped protrusion formed at the notch end of the surface plate is formed in a peripheral wall erected around the joint forming member, and the outer end of the peripheral wall and the An electric heating board characterized in that a part of the peripheral wall is brought into contact with a joint part cover placed over the back surface of the surface plate or the joint part forming member to prevent leakage of the foam.