JP2005310443A - Waterproofing electric heat sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that water from melted snow invades into a power supply cord connected to an exothermic body housed in a snow melting sheet. <P>SOLUTION: This water proofing electric heating sheet has a first pocket and a second pocket welded and formed on the surface of a sheet bag to house the exothermic body having the power supply cord, wherein the sheet is composed of the first pocket in which the power supply cord can be inserted through an insertion hole, and the second pocket which is adjacent to the first pocket and in which the power supply cord is inserted through the insertion hole, and in which an injection hole is formed at the upper face and a check valve is installed at the lower face, then resin is filled into the injection hole up to the check valve in order to achieve waterproofing completely. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric heating sheet having a surface heater that is used for floor heating or the like and warms the feet of a person standing on the floor, or a line that melts snow or ice that accumulates on a road or roof that is used outdoors. It is an improvement invention regarding the snow melting mat which has the shape heater inside.

  Each conventional electric heating sheet has a structure of three types of heating elements, and has a linear heater made of nichrome wire or aluminum foil using a series electrode, etc., and a thermosensor made of carbon fiber or cloth using a parallel electrode. There are two types of sheet heaters, and a line heater that is made of woven cloth or net cloth using the parallel electrodes and has a thermosensor removed. Specifically, in the case of floor heating or the like, it is possible to warm the feet of the person on the floor or the floor by burying the electric heating sheet on the floor or laying the electric heating sheet on the upper surface of the floor. In the case of the snow melting mat included in the interior, the snow piled up on the mat is melted, and the road heating pavement that prevents freezing inside the pavement of the road and the heating wire embedded in the roof are used as the heat source for energization There was an "electric heating sheet" that can melt snow etc. on the pavement and roof.

  However, power cords must be provided in order to connect any of the electric heating sheets used for floor heating, etc., and snow melting mats used on roofs, paved roads, etc. to each heater, and each power cord is an insulator. Even if it is covered with a rubber coating, etc., the lead-out hole provided when the power cord is led out from the main body cannot be completely adhered, and there is a risk that water may enter through the gap between the lead-out holes. There was also a risk of causing a fire due to electric leakage.

  As a conventional invention, there is a “snow melting mat” described in Patent Document 1. The snow melting mat includes a heating element layer in which a conductive cloth for heating is coated on a woven fabric having a pair of electrode conductors disposed at both ends, a vinyl chloride sheet laminated on the upper surface and the lower surface of the heating element layer, It was a snow-melting mat provided with an aluminum sheet having a rubber-containing resin layer on the surface, which was adhered to the upper and lower surfaces of the vinyl chloride sheet.

The power cord constituting the "snow melting mat" is fixed to a plurality of lead wires for power supply by soldering or the like to a connection terminal or by soldering or the like to one end of a connection lead via a crimp terminal Was. It should be noted that a soldered connection portion (not shown) was fixed with an insulating tape or the like in order to provide sufficient waterproofing.
Japanese Patent Laid-Open No. 9-177054

  The problem to be solved by the present invention is that water or the like enters the power cord connected to the heating element provided in the waterproof electrothermal sheet from the outside, and a linear heater or a planar heater provided in the heating element, etc. This is a point that causes electric leakage and breakdown.

  Therefore, in order to completely prevent the intrusion of snowmelt water or the like, the present invention provides a pocket filled with a synthetic resin in close contact with the top of the snowmelt mat or the like or the upper surface of a cover or the like covering the heating element. By inserting the power cord from the outside of the pocket into the inside of the pocket, it is possible to completely prevent water from entering from the outside outlet and inside.

In order to solve the above problems, the present invention forms the first pocket 2a and the second pocket 2b on the surface of the seat bag 3 in which the heating element 4 having the power cord 5 is accommodated, and is formed in the first pocket 2a. The power cord 5 is inserted into the formed insertion holes 2i and 2j, the power cord 5 is inserted into the insertion holes 2e and 2f formed in the second pocket 2b, and an injection hole 2d provided on the upper surface of the second pocket 2b. It is a waterproof electric heating sheet characterized in that it can be completely waterproofed by filling the inside of the second pocket 2b with the resin 6 over the check valve 2h.

  First, the power cord can be inserted on the surface of the soft synthetic resin, has a plurality of insertion holes, and has a pocket that can be filled with silicone resin, so that the power cord can be waterproof and the power cord can be fixed with resin. A waterproof electrothermal sheet that can prevent disconnection can be provided. Specifically, at home, the waterproof electric heat sheet according to the present invention can be laid in places around the water such as a kitchen floor or a toilet floor, so that the cold under the feet can be easily eliminated even in the midwinter.

  The present invention can provide a waterproof electrothermal sheet by providing a pocket filled with resin at the outlet of the power cord provided in the sheet bag 3 using a soft resin.

Hereinafter, the waterproof electrothermal sheet according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a front view of a waterproof electric heating sheet containing a heating element constituting the present invention, and FIG. 2 is a front view of the waterproof electric heating sheet according to the present invention.

  The waterproof electrothermal sheet 1 according to the present invention has a first pocket 2a and a second pocket 2b welded to the surface of a seat bag 3 containing a heating element 4 having a power cord 5, and the power cord 5 is inserted into the insertion holes 2i and 2j. The first pocket 2a that can be inserted, the power cord 5 is inserted into the insertion holes 2e and 2f adjacent to the first pocket 2a, the injection hole 2d is provided on the upper surface, and the check valve 2h is provided on the lower surface. A waterproof electric heating sheet comprising a second pocket 2b that is completely waterproofed by injecting resin 6 over the check valve 2h.

A soft resin is used for the seat bag 3, which is housed in the seat bag 3, and power supply terminals (not shown) as electrodes are provided at both left and right ends of the heating element 4 provided integrally with the power cord 5 and the like. I have. In the present invention, the power cord 5 extending from the heating element 4 is fixed by the first pocket 2a in the pocket 2 integrally formed on the upper surface of the seat bag 3, and the power cord 5 is inserted into the second pocket 2b. Further, the power cord 5 can be waterproofed by injecting the resin 6 into the second pocket 2b after the power cord 5 is inserted.

The sheet bag 3 includes a substantially rectangular upper sheet material 3a and a lower sheet material 3b. The sheet bag 3 includes an outer edge 3c in which a joint between the overlapping upper sheet material 3a and lower sheet material 3b is welded. The material of the upper sheet material 3a and the lower sheet material 3b is a soft synthetic resin, and specifically, soft vinyl chloride, soft polyvinyl chloride, an olefin resin, or the like can be used. The outer edge 3c of the sheet bag 3 is welded in a square shape by internal heating by vibrating the molecules of the sheet bag 3 that is a heated body as in high-frequency welding.

The heating element 4 includes a fiber layer 4a and a sponge layer 4b which are heat insulating materials. On the upper surface of the heating element 4, a first cord 5 a and a second cord 5 b branched from the power cord 5 are respectively provided on the surface of the heating element 4. The power cord 5 includes a first cord 5a and a second cord 5b, which are thin wires, between the power cord 5 and the heating element 4 inside the seat bag 3.

The first cord 5a and the second cord 5b are provided so as to be parallel to the heating element 4. However, the cords are tied so that each cord forms a ring with each other, like a fastening knot. Thus, each of the first cord 5a and the second cord 5b is “prevented from slipping out” from the second pocket 2b.

The pocket 2 has a substantially rectangular shape provided on the surface of either the upper sheet material 3 a or the lower sheet material 3 b of the sheet bag 3, and the power cord 5 and the first cord 5 a stored inside the power cord 5. In order to fix the second cord 5b and prevent the intrusion of water or the like, it comprises a bag-like first pocket 2a and a second pocket 2b for injecting resin.

The first pocket 2a is a pocket in which the power cord 5 is first inserted and substantially elliptical insertion holes 2i and 2j for holding the outer periphery of the power cord 5 are provided on the upper surface of the first pocket 2a.
Further, by inserting the power cord 5 through the insertion holes 2i and 2j, the upper surfaces of the insertion holes 2i and 2j are substantially tunnel-shaped, and an adhesive or a resin material (not shown) is provided inside the first pocket 2a. Since it can be filled, the outer periphery of the power cord 5 can be fixed.

Therefore, the first pocket 2a can hold the power cord 5 with resin before being separated into the first cord 5a and the second cord 5b. The bonding may fix not only the inside of the insertion holes 2i and 2j of the first pocket 2a but also the vicinity of the entrance 2k of the insertion hole 2i and the vicinity of the exit 2l after passing through the insertion hole 2j. it can.

The adhesive used in the present invention is a commercial product. A quick-drying adhesive is preferred. Note that the adhesive is applied to the power cord 5, the vicinity of the entrance 2k on the first pocket 2a, and the exit 2l of the first pocket 2a, and left for 5 to 10 minutes. What is necessary is just to crimp | bond the said power cord 5 and the surface of the 1st pocket 2a.

The second pocket 2 b is a member that can hold each of the first cord 5 a and the second cord 5 b branched from the power cord 5 in the resin 6. This is a bag for injecting paste-like resin 6 from an injection hole 2d provided at the center of the second pocket 2b.

The insertion hole 2e and the insertion hole 2f serve as air holes for removing the air generated inside the second pocket 2b when the resin 6 is filled. After the resin 6 is injected, the resin 6 is placed in the entire second pocket 2b. Since it spreads to every corner without any gaps such as air, it is possible to completely prevent the intrusion of rainwater and snow melt.

The resin 6 is a caulking material such as silicon. The silicon is a material that contains a silicon polymer as a main component, becomes a paste before curing, and becomes a rubber-like elastic body after curing. As the resin 6 used in the present invention, it is preferable to use a resin that hardly undergoes discoloration, cracking, deformation, or the like.

  The second pocket 2b includes a circular injection hole 2d for injecting a resin material or the like on the upper surface, a substantially C-shaped injection path 2c for visually confirming the resin entering from the injection hole 2d, and filling the injection path 2c. Is composed of a protruding portion 2g that rises at the same time.

It should be noted that the first cord 5a and the second cord 5b branched from the power cord 5 into two cords can be inserted one by one into the position integrated with the upper sheet material 3a on the lower surface of the second pocket 2b. The possible insertion hole 2f is provided.

Further, a check valve 2h is provided adjacent to the insertion hole 2f and at the position of the opening of the substantially C-shaped injection path 2c. The check valve 2h is an opening through which the resin 6 flows into the second pocket 2b after the resin 6 is injected from the injection hole 2d and the injection path 2c is completely filled.

The attachment positions of the first pocket 2a and the second pocket 2b constituting the waterproof electrothermal sheet 1 according to the present invention are preferably arranged at the center of the attachment member. However, the attachment position of the pocket 2 composed of the first pocket 2a and the second pocket 2b is not limited, and the attachment position can be freely changed according to the application.

3 is an AA longitudinal sectional view of the waterproof electrothermal sheet of the present invention, FIG. 4 is a BB longitudinal sectional view of the waterproof electrothermal sheet of the present invention, and FIG. 5 is a waterproof electrothermal sheet of the present invention. Details will be described with respect to the longitudinal sectional view of BB filled with resin.

FIG. 3 shows an AA longitudinal sectional view of the waterproof electrothermal sheet 1 shown in FIG.
As shown in FIG. 3, the substantially elliptical power cord 5 is installed at the center position of the pocket 2, and the outer periphery of the power cord 5 is fixed with a resin 6. Therefore, even when rainwater or the like has entered, it is possible to prevent danger such as electric leakage or short circuit by being completely covered with the resin 6.

As shown in FIG. 4, the first cord 5a and the second cord 5b constituting the waterproof electrothermal sheet 1 according to the present invention use a substantially cylindrical insulating tube 5c between the pocket 2 and the heating element 4, respectively. can do. The insulating tube 5c is a heat-shrinkable tube and uses a polyolefin-based material rich in water resistance. A crimp terminal (not shown) can be used inside the insulating tube 5c.

As shown in FIG. 5, the waterproof electrothermal sheet 1 according to the present invention has a tapered cylindrical resin filling gun 7.
Is inserted into the injection hole 2d and is gripped so as to narrow the generally letter-shaped grip 7a, so that the second pocket 2b constituting the waterproof electrothermal sheet 1 can be easily formed from the cartridge 8 inside the barrel 7b. Resin 6 can be filled inside.

The resin 6 is filled into the space from the check valve 2h, which is a hole inserted into the pocket 2 through the injection path 2c, and once filled into the space of the second pocket 2b. Become.
Then, when the filling of the second pocket 2b is completed, the protruding portion 2g at the top of the check valve 2h
Until the upper surface of the injection path 2c is slightly expanded.

Therefore, the operator filling the resin 6 can always visually check the filling amount of the resin 6, and the resin 6 and the like can be easily leaked from the insertion hole 2f provided in the second pocket 2b. The power cord 5 can be waterproofed and fixed.

FIG. 6 is an enlarged view of a BB longitudinal section of the waterproof electrothermal sheet according to the present invention. As shown in the enlarged view of the waterproof electrothermal sheet in FIG. 6, the inside of the pocket 2 is filled with silicon resin 6. It can be confirmed whether or not the silicon resin 6 is cured by pressing the injection path 2c on the upper surface of the second pocket 2 with the tip of the finger after the resin 6 is cured to some extent. Further, by pushing the tip of the injection path 2c, the check valve 2h is applied with the internal pressure from the resin 6 and is brought into close contact, so that the resin does not leak from the injection hole 2d, the insertion hole 2e, and the insertion hole 2f.

It is a front view of the waterproof electrothermal sheet which accommodated the heat generating body which is this invention. It is a front view of the waterproof electrothermal sheet which is the present invention. It is AA longitudinal cross-sectional view of the waterproof electrothermal sheet which is this invention. It is BB longitudinal cross-sectional view of the waterproof electrothermal sheet which is this invention. It is a longitudinal cross-sectional view of BB which filled resin in the waterproof electrothermal sheet which is this invention. It is an enlarged view of BB longitudinal section of the waterproof electrothermal sheet which is the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waterproof electrothermal sheet 2 Pocket 2a 1st pocket 2b 2nd pocket 2c Injection path 2d Injection hole 2e Insertion hole 2f Insertion hole 2g Protrusion part 2h Check valve 2i Insertion hole 2j Insertion hole 2k Near entrance 2l Exit vicinity 3 Seat bag 3a Top Sheet material 3b Lower sheet material 3c Outer edge 4 Heating element 4a Fiber layer 4b Sponge layer 5 Power cord 5a First cord 5b Second cord 5c Insulating tube 6 Resin 7 Resin filling gun 7a Grip portion 7b Body portion 8 Cartridge

Claims (1)

A first pocket and a second pocket are welded and formed on the surface of a seat bag containing a heating element having a power cord, the first pocket through which the power cord can be inserted into the insertion hole, and the insertion hole adjacent to the first pocket. A waterproof electrothermal sheet comprising: a second pocket through which the power cord is inserted, an injection hole is provided on the upper surface, and a check valve is provided on the lower surface and resin is injected from the injection hole to the check valve to completely waterproof.

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