JP2000333781A - Seat having heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the positional slip of a heater wire from occurring due to a temperature increase and an expansion pressure by a reacting heat at the time of a foaming, or the heating of a molding die, or the like, by embedding a heater unit wherein the heater wire is sewn to a core body with a needle thread and a bobbin thread, in a pad. SOLUTION: At the time of the foaming of a pad 11 having a cushioning property, comprising a flexible expanded body of polyurethane, or the like, a heater wire 12 is sewn to a core body 15 having flexibility, comprising a non-woven fabric, a mesh cloth, a woven fabric, or the like with a needle thread 13 comprising a polyamide fiber, or the like, and a bobbin yarn 14 comprising a polyamide fiber, or the like, to constitute a heater unit 16. Then, such a heater unit 16 is embedded in the pad 11. Also, by using a permeable material such as a cotton thread for the materials of the needle thread 13 and the bobbin thread 14, the pad stock solution is infiltrated in the needle thread 13 and the bobbin yarn 14 and cured when the pad 11 is foamed. Therefore, the fixing force of the needle thread 13 and the bobbin thread 14, and the pad 11 can be improved, and the positional slip of the heater wire 12 can be prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat with a heating device for heating a seating surface.

[0002]

2. Description of the Related Art A conventional seat with a heating device of this type is shown in FIG.
As shown in (1), the heater unit 1 is embedded during foam molding of the pad 2 made of a soft foam, and the skin 3 is disposed on the surface of the pad 2. As shown in FIG. 4, the heater unit 1 has a heater wire 5 disposed on a core 4 and a cloth 6 attached to both surfaces of the core 4 with an adhesive. (For example, Japanese Utility Model Application Laid-Open No. 58-178957).

[0003]

However, in the above-mentioned conventional configuration, the heater wire 5 is fixed by being sandwiched between the core body 4 and the cloth body 6 when the core body 4 and the cloth body 6 are bonded with an adhesive. There has been a problem that the adhesive is softened by a reaction heat at the time of foam molding of the pad 2 or a temperature rise due to heating of a molding die, and a displacement of the heater wire 5 occurs due to a foaming pressure at the time of foam molding.

[0004] As is well known, when the heater wire 5 is displaced, the unevenness of the temperature or the adjacent heater wire 5 approaches,
Local overheating causes breakage of the heater wire 5 and accelerates deterioration of seat components, thereby reducing durability.

[0005] Further, since the cloth 6 is bonded to both surfaces of the core material 4, the undiluted solution of the pad 2 permeates the cloth 5 during foam molding of the pad 2, and solidifies without forming cells. Therefore, the pad 2 becomes hard and reduces the cushioning property of the pad 2, and only the portion where the cloth body 5 exists becomes hard,
There is a problem that the flexibility is different from other portions of the pad 2 and a foreign-body sensation is felt.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is intended to prevent a reaction heat at the time of foam molding of a pad, a temperature rise due to heating of a molding die and a displacement of a heater wire due to a foaming pressure. To improve durability. It is another object of the present invention to provide a heating device-equipped seat that eliminates a foreign-body sensation without lowering the cushioning properties of the pad.

[0007]

In order to solve this problem, the present invention embeds a heater unit in which a heater wire is sewn to a core with an upper thread and a lower thread in a pad. By suturing the core with the upper and lower threads, it is possible to prevent the reaction heat during foam molding, the temperature rise due to the heating of the molding die, and the displacement of the heater wire due to the foaming pressure, thereby improving the durability. be able to.

[0008] Further, since at least one of the upper thread and the lower thread is made of a permeable material, the adhesion between at least one of the upper thread and the lower thread and the pad is improved, so that the position of the heater wire is reduced. The displacement can be prevented, and the durability can be further improved.

Further, the core body is provided with means for suppressing permeation. By applying means to suppress penetration into the core, the undiluted solution of the pad does not penetrate into the core during foam molding of the pad, so the core does not become hard and does not reduce the cushioning of the pad, eliminating the feeling of foreign matter can do.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention described in claim 1 of the present invention is directed to a heater unit comprising a heater wire and a core embedded during foam molding of a cushioning pad made of a soft foam, and a heater unit comprising: The heater wire is sewn to a core with an upper thread and a lower thread. The heater wire is sewn to the core with the upper thread and the lower thread to prevent the reaction heat during foam molding, the temperature rise due to the heating of the molding die, and the displacement of the heater wire due to the foaming pressure. Can be improved.

According to a second aspect of the present invention, at least one of the upper thread and the lower thread is made of a permeable material, so that the pad stock solution is applied to at least one of the upper thread and the lower thread during foam molding of the pad. Since it penetrates and cures, by improving the fixing force between at least one of the upper thread and the lower thread and the pad, the displacement of the heater wire can be prevented, and the durability can be further improved.

Further, the invention according to claim 3 is provided with a means for suppressing penetration into the core body. By providing the means for suppressing permeation into the core, the stock solution of the pad does not penetrate into the core during foam molding of the pad, so that the cushioning property of the pad is not reduced and the feeling of foreign substances can be eliminated.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

(Embodiment 1) The invention of Embodiment 1 will be described with reference to FIG.

In FIG. 1, reference numeral 11 denotes a pad made of a soft foam such as polyurethane and having a cushioning property. When the pad 11 is foamed, a heater wire 12 is formed of an upper thread 13 made of a polyamide fiber or the like and a polyamide fiber or the like. A heater unit 16 sewn to a flexible core 15 made of a nonwoven fabric, a mesh cloth, a woven cloth, or the like is embedded in the pad 11 with the lower thread 14.

In the above configuration, the heater wire 12 is sewn to the core body 15 with the upper thread 13 and the lower thread 14,
It is possible to prevent the temperature rise due to the reaction heat at the time of foam molding of the pad 11, the heating of the molding die and the like, and the displacement of the heater wire 12 due to the foaming pressure, thereby improving the durability.

Further, by making the material of the upper thread 13 and the lower thread 14 a permeable material such as cotton thread, the stock solution of the pad penetrates into the upper thread 13 and the lower thread 14 and hardens when the pad 11 is foamed. By improving the fixing force between the thread 13, the lower thread 14 and the pad 11, the displacement of the heater wire 12 can be prevented, and the durability can be further improved.

The upper thread 13 and the lower thread 14 may be formed by twisting non-permeable material threads, and the undiluted pad may be penetrated into the twisted gap.

(Embodiment 2) The invention of Embodiment 2 will be described with reference to FIG.

The second embodiment differs from the first embodiment in that a means for suppressing permeation such as attaching a flexible resin film 17 such as polyethylene to both surfaces of a core 15 as shown in FIG. It is doing.

The components having the same reference numerals as those in the first embodiment have the same configuration, and the description is omitted.

In the above configuration, the means for suppressing permeation of the core body 15 is provided, so that the undiluted solution of the pad does not permeate the core body 15 during foam molding of the pad 11.
5 is not hardened, the cushioning property of the pad 11 is not reduced, and the feeling of foreign matter that the flexibility of the core body 15 and the other parts of the pad 11 are different can be eliminated.

[0023]

As apparent from the above embodiment, claim 1
According to the invention, since the heater wire is sewn to the core with the upper thread and the lower thread, the heat of reaction during foam molding, the temperature rise due to the heating of the molding die, and the displacement of the heater wire due to the foaming pressure. Can be prevented, and the durability can be improved.

Further, since at least one of the upper thread and the lower thread is made of a permeable material as in the second aspect of the present invention, the pad stock solution is applied to at least one of the upper thread and the lower thread during foam molding of the pad. Since it penetrates and cures, by improving the fixing force between at least one of the upper thread and the lower thread and the pad, the displacement of the heater wire can be prevented, and the durability can be further improved.

Further, by providing the means for suppressing penetration into the core body as in the invention of claim 3, since the stock solution of the pad does not penetrate into the core body during foam molding of the pad, the core body does not become hard, The feeling of foreign matter can be eliminated without lowering the cushioning properties of the pad.

[Brief description of the drawings]

FIG. 1 is a sectional view of a seat with a heating device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a seat with a heating device according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a conventional seat with a heating device.

FIG. 4 is a sectional view of a conventional heater unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Pad 12 Heater wire 13 Upper thread 14 Lower thread 15 Core 16 Heater unit

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Mitsuru Yoneyama 1006 Kazuma Kadoma, Osaka Pref.Matsushita Electric Industrial Co., Ltd. Term (reference) 3B084 JA06 JF01

Claims (3)

[Claims] 1. A heater unit comprising a heater wire and a core buried when foaming a pad having cushioning properties made of a soft foam, and a heater unit comprising the heater unit connecting the heater wire to the core with an upper thread and a lower thread. Seat with heating system constructed by sewing. 2. The seat with a heating device according to claim 1, wherein at least one of the upper thread and the lower thread is made of a permeable material. 3. The seat with a heating device according to claim 1, wherein the core body is provided with a means for suppressing permeation.