JPS6365820A - Heating seat for car - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to heated seats for automobiles, and in particular, the present invention relates to a heated seat for an automobile, and in particular, to a seat cushion, a seat back, or a main pad constituting both of them, the seat cushion, the seat back, or the main pad constituting both of them can be heated using three components: an outer skin, a cover pad, and a backing fabric. The trim cover assembly is covered with an integrated trim cover assembly, and a predetermined part of the trim cover assembly is locked and buried in a tree wire buried in the main pad, and the seat cushion, the seat back, or both are covered with a trim cover assembly. This invention relates to a heated seat for an automobile having a heat-generating sheet embedded therein.

[Prior art]

In general, heated seats for automobiles in the form of heated seats use a heating element, which is the main component of the heating sheet, in which a single metal heating wire such as a nichrome wire is arranged in a meandering manner, and the heating element is powered by an external power source. It is designed to generate heat electrically by connecting it to the

Japanese Utility Model Application Publication No. 59-71598 discloses a heated seat similar to such a heated seat, in which a trim cover assembly is composed of an outer skin and a back base fabric, and there is no space between them. A heat generating sheet is inserted. Therefore, the heat generating sheet has elongated insertion holes formed at predetermined locations thereof, and slings and tongue pieces are provided at portions of the outer skin and back base fabric facing the insertion holes. The sling is inserted through the insertion hole and locked to the tree wire, and the tongue piece is sewn to the sling.

[Problem that the invention seeks to solve]

By the way, in such a heated seat, a sling and a tongue piece must be provided on the outer skin and back base fabric that make up the trim cover assembly, and in the heat generating seat, the metal heating wire is routed around a predetermined point and inserted into the insertion hole. It is extremely troublesome as it is necessary to secure a location for forming the hole and to form an insertion hole in the same location. In addition, in such heated seats, when covering the main pad with the trim cover assembly, the sling on the outer skin must be inserted into the insertion hole of the heat generating sheet, and the tongue piece provided on the backing fabric must be sewn to the sling. Not necessarily,
The workability of burying the heat generating sheet is extremely poor.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a heated seat for an automobile of the type described above, which eliminates the above-mentioned problems and has a sufficient heating function.

[Means for solving problems]

In order to achieve such an object, the present invention provides a heating seat for an automobile of the type described above, in which the heating sheet is composed of an electrode made of a metal conductive wire and a large number of organic linear heating elements connected to the electrode and arranged in parallel with each other. Equipped with a sheet-shaped heater,
The heating sheet is continuously interposed between the outer skin and the cover pad of the trim cover assembly and is locked to the tree wire.

Therefore, in the heated automobile seat according to the present invention, the buried portion of the trim cover assembly extends in the longitudinal direction, the width direction, or both of the seat cushion and the seat back, and the space between the buried portions has a three-dimensional appearance. The heat generating seat preferably has the following configuration. That is, (1) the sheet-like heater has a parallel wiring structure of electrodes and organic linear heating elements.

(2) In the sheet-like heater, the organic linear heating element is a component of one of the warp and warp yarns, and the electrode is a component of the other one of them.

(3) The 8M linear heating element is a heating element made of a core yarn and a flexible synthetic resin layer covering the outer periphery of the concentric yarn and containing countless conductive particles.

[Action/effect of the invention]

In the heated automobile seat having such a configuration, a large number of organic linear heating elements that constitute the sheet-like heater of the heating sheet electrically generate heat to exert a heating function. In addition, since the heat-generating seat is interposed between the trim cover assembly's skin and the cover pad, the heat from the seat is transferred to the seat cushion,
It is efficiently transmitted to the seat back side. Therefore, in the heated seat, the surfaces of the seat cushion, seat back, etc. are sufficiently heated.

In addition, in the heated seat, the heating element, which is the main component of the heating sheet, has flexibility, bending fatigue resistance, abrasion resistance,
Since it is an organic linear heating element with excellent mechanical strength, the heating sheet itself also has similar characteristics. Therefore, even if the heated seat is installed in an automobile and used under severe conditions, it can sufficiently maintain its heating function for a long period of time.

Furthermore, the organic linear heating elements in the heating sheet are less likely to damage sewing machine needles during sewing, and even if a few of the heating elements arranged in parallel are damaged or cut, the heating sheet as a whole will maintain its heating function. There is no harm to it. For this reason, a heat generating sheet can be interposed between the outer skin and the cover pad constituting the trim cover assembly, and these three and the back base fabric constituting the trim cover can be sewn in any direction.

Therefore, in the heated seat, one heat generating sheet is continuously arranged between the outer skin and the cover pad constituting the trim cover assembly, and the four members of the outer skin 2 heat generating sheet, the cover pad and the back base fabric are arbitrarily arranged. Sewing it on,
The heat generating sheet can be continuously interposed between the skin of the trim cover assembly and the cover batt, and the heat generating sheet can be locked to the tree wire. For this reason,
According to the heated seat, like the conventional heated seat, the outer skin and the back base fabric that make up the trim cover assembly include a sling,
There is no need to provide a tongue piece or the like, and there is also no need to form any through holes in the heat generating sheet.

Further, the work of embedding the heat generating sheet is easy and has good workability.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.
The figure shows a heated seat for an automobile according to a first embodiment of the present invention. In this seat, the heat generating sheet 10 is connected to the seat cushion 20a and the seat back 2 that constitute the seat.
It is buried in both 0b. In addition, in the seat cushion 20a, as shown in FIGS. 1 and 2, a trim cover assembly that covers the front side of the main pad 21 is composed of a pair of trim covers 22.23, and each trim cover 22.23. 23 are integrally sewn together at the front and rear ends. seat back 20b
Similarly, the trim cover assembly is composed of a pair of trim covers 24 and 25, and both of these 2
4.25 is similarly integrated.

Therefore, the heat generating sheet 10 has a seat cushion 20a,
Each trim cover 22.2 is wide enough to extend the entire width of the seat back 20b, and
The epidermis 22a forming part 3.

23a and cover pads 22b, 23b, and in this state, the front and rear ends of each trim cover 22, 230 are sewn to each other, and a part of the heat generating sheet 10 is heated at this sewn portion. The loop-shaped locking portion 10a
is formed. In such a heat generating sheet 10, the first tree wire 26a is inserted through the loop-shaped locking portion 10a, and the second tree wire 26a embedded in the main pad 21 is inserted into the loop-shaped locking portion 10a.
6b via a plurality of C rings 26c.

As a result, the sewn portion is buried, and both the front and back portions of the sewn portion are bulging, creating a three-dimensional appearance. Note that the same applies to the seat back 20b.

As shown in FIGS. 3 and 4, the heat generating sheet 10 mainly includes a sheet-like heater 10b, a heat transfer layer 11 laminated on the surface of the heater 10b, and a heat insulating layer 12 laminated on the back surface of the heater 10b. It has a layered structure.

The sheet-like heater job is a cloth-like object whose weft and warp yarns are made of ordinary synthetic fibers such as polyester, polyamide, polyolefin, polyacrylic fibers, etc. As shown in FIG. A plurality of conductive wires 14 are arranged in parallel at a predetermined interval,
Furthermore, a large number of organic linear heating elements 16 are arranged in parallel at a predetermined weaving density within a large number of weft yarns 15 made of synthetic fibers. Each metal conductive wire 14 is connected to a battery 27 mounted on the vehicle via a lead wire connected to its terminal, and functions as an electrode.

FIG. 6 shows a modified example of the sheet-like heater, and in the sheet-like heater 10c of this modified example, the linear heating elements 16 are not arranged in the portion that becomes the loop-like locking portion 10a. Thereby, the linear heating element 16 can be used effectively.

The metal conductive wire 14 functioning as an electrode is composed of a thin wire made of copper or other conductive metal, or a If thread coated with various metals such as metal plating or sputtering flat fiber. In particular, metal-coated fiber threads have excellent flexibility and are therefore suitable as the metal conductive wire of the present invention.

Even one of these thin wires or threads can function as an electrode, but
From the viewpoint of durability and safety, it is preferable to arrange multiple pieces in parallel. Further, as the metal conductive wire 14, it is preferable to use one that has been subjected to anti-rust treatment and one that is highly flexible in the form of a twisted thread.

The organic linear heating element 16 is preferably a linear heating element composed of a core thread and a flexible synthetic resin layer covering the outer periphery of the concentric thread and containing countless conductive particles. In such a linear heating element 16, the core yarn is made of ordinary synthetic fibers such as polyamide and polyester.

Threads made of synthetic fibers such as polyolefin and polyacrylic are used. Synthesis of these! 1lili! Of these,
If a synthetic fiber is selected that exhibits a distinct melting point at a given temperature, the core thread will function as a temperature fuse. Powdered carbon represented by carbon black is mainly used as the conductive particles, but metal powder may also be used together with or in place of this.

The particle size of such particles is not particularly limited as long as they are in a fine powder state that does not interfere with kneading and coating properties, but 20 to 40 mμ is generally preferred. Although the conductive particles are mixed in the flexible synthetic resin, it is preferable for the present invention to incorporate a substance, such as ceramic powder, which has the effect of increasing the emissivity of far infrared rays into the heat generating composition. It is also possible to adopt a structure in which a heat generating layer made of conductive particles is covered with a dispersed layer of ceramic powder. As a flexible synthetic resin that supports conductive particles, it has relatively low thermal deterioration and has binder properties (adhesion).
It is preferable to use a flexible material having the following properties, and examples thereof include synthetic resins such as polyurethane, polyacrylic, and polybutyral. A flexible synthetic resin layer is formed by covering and supporting the outer periphery of the core yarn with such resin.

When imparting both preferable mechanical properties and heat generating properties to the linear heating element 16, the mixing ratio of the conductive particles and the flexible synthetic resin is 5 to 15 parts by weight, preferably 7 parts by weight, based on 100 parts of the resin. ~12 parts by weight.

Further, it is preferable that the resistance value of the linear heating element 16 is adjusted to about 12 to 14 Ω/m.

The sheet-like heater 10b is formed in the form of a sheet by using the above-described metal conductive wire 14 and the linear heating element 16 as part of warp and warp yarns, but it is formed in the form of a cloth using, for example, a normal loom. The sheet-like heater 10b has the same flexibility as a normal cloth, and its calorific value increases as the distance between the metal conductive wires 14 (electrodes) arranged in parallel increases as the distance between the electrodes decreases. The more you do, the more it increases.

Therefore, by adjusting these two requirements, it is possible to adjust the amount of heat generated by the sheet-like heater 10b, and the heater 10b generates uniform Joule heat from its entire surface.

The heat generating sheet 10 includes a heat transfer layer 11 on the surface of a sheet heater 10b. The heat transfer layer 11 uniformly distributes and transfers the heat of the sheet-like heater 10b to its surface side, and its constituent members include materials with excellent heat transfer properties, such as metals, metal oxides, and other inorganic compounds. For example, ceramics etc. are selected. When a conductive material is used among these materials, the material is laminated on the surface of the sheet-like heater 10b via an electrically insulating material such as fiber or resin.

When the heat transfer Nll is made of metal or metal oxide, these can be laminated on the sheet-like heater 10'b by coating means such as plating or sputtering, and these materials can be used to form fibers, fiber sheets, resins, etc. The sheet-like material covered with the sheet can be laminated on the sheet-like heater 10b via an adhesive. Heat transfer, I? ! When 11 is made of ceramics, the emissivity of far-infrared rays is increased and heat is transmitted more effectively.

For example, when ceramic powder dispersed layers are laminated, excellent thermal effects are exhibited.

The heat generating sheet 10 includes a heat insulating layer 12 on the back surface of the sheet heater 10b. The heat insulator N12 prevents heat dissipation from the sheet-like heater 10b, and a heat insulating member such as a resin sheet, a foam, a fiber sheet, a knitted fabric, etc. is appropriately selected as its constituent member. It is preferable that such a heat insulating layer 12 has a metal coated surface having a radiant heat reflecting function on the negative side. In this case, the heat insulating layer 1 is arranged so that the metal coated surface faces the back surface of the sheet-like heater 10b.
It is preferable to laminate two layers. In addition, a material having a coating layer of metal, metal oxide, etc. can be used as a component of the heat insulation JΔ12, and in these cases, it may be laminated on the back surface of the sheet-like heater 10b via an insulating material as necessary. do.

In the heated automobile seat having such a configuration, the large number of organic linear heating elements 16 that constitute the sheet-like heater 10b of the heat generating sheet 10 electrically generate heat to exert a heating function.
Heat transfer JF to one side of the sheet heater 10b! ! 11 and a heat insulating layer 12 on the other side of the heater 10b, the heat of the heater 10b is prevented from dissipating to the other side of the heat generating sheet 10, and is evenly distributed and transmitted to one side. be able to. Furthermore, since the heat generating sheet 10 is interposed between the skin of each trim cover 22 to 250 and the cover batt, the heat of the sheet 10 is transferred to the seat cushion 20a.
, is efficiently transmitted to the front side of the seat back 20b. Therefore, in the heated seat, the seat cushion 20
The surfaces of the a1 seat bag 20b and the like are sufficiently heated.

In addition, in the heated seat, the heating element, which is the main component of the heating sheet 10, is an organic linear heating element 16 that has excellent flexibility, bending fatigue resistance, abrasion resistance, and other mechanical strengths. The heat generating sheet 10 itself also has similar characteristics. Therefore, even if the heated seat is installed in an automobile and used under severe conditions, it can sufficiently maintain its heating function for a long period of time.

Furthermore, the organic linear heating elements in the heating sheet 10 rarely damage sewing machine needles during sewing, and even if a few of the heating elements arranged in parallel are damaged or cut, the heating sheet 10 as a whole Does not impair heat generation function. For this reason, the heat generating sheet 10 is interposed between the outer skin and the cover pad that constitute the trim covers 22 to 25, and these three and the back base fabric that constitutes the trim cover can be sewn in any direction.

Therefore, in the heated seat, one heat generating sheet 1
0 is continuously arranged between each skin and each cover pad constituting the 7x number of trim covers 22 to 25, and the four parts of the skin 2 heat generating sheet, the cover pad, and the back base fabric are arbitrarily sewn to each other. , heat generating sheet 10 to each trim cover 22~
250 can be continuously interposed between the outer skin and the cover pad, and the heat generating sheet 10 can be locked to the tree wire 26b. Therefore, according to the heated seat,
Unlike conventional heated seats, there is no need to provide slings, tongue pieces, etc. on the outer skin and back fabric that make up the trim cover assembly, and there is also no need to form any insertion holes in the heat generating seat. Further, the work of embedding the heat generating sheet is easy and has good workability.

FIG. 8 shows a heated automobile seat according to a second embodiment of the present invention. Also in this seat, heat generating sheet 1
0 is embedded in both the seat cushion 30a and the seat back 30b. Further, in the seat cushion 30a, as shown in FIGS. 8 and 9, a trim cover assembly that covers the front side of the main pad 31 is composed of three trim covers 32 to 34.
The trim covers 32 to 34 are integrally sewn to each other at the front and rear end portions. Similarly, in the main trim cover assembly of the seat back 30b, the trim covers 35 to 37 are integrally sewn together at the upper and lower end portions of each side.

Therefore, the heat generating seat 10 is approximately the same size as the main trim cover assembly of the seat cushion 30a and the seat back 30b, and the seat cushion 30a
As shown in FIG. 9, each trim cover 32 to
The epidermis 32a to 34a and the cover pad 32b in 34
- 34b, and in this state are integrally sewn to the front and rear ends of each trim cover 32-34. As a result, each of the trim covers 32 to 34 of the seat cushion 30a has a raised three-dimensional appearance. The seat back 30b is also similar to this.

In addition, in FIG. 9, reference numerals 32C to 34. c indicates the back base fabric, and in the heat generating sheet 10, loop-shaped locking portions 10a, 10a are provided at the sewn portions of each trim cover 32 to 34.
It is equipped with

Therefore, the heated seat of the second embodiment also functions in the same manner as the heated seat of the first embodiment, and produces the same effects.

In each of the above embodiments, an example was shown in which a three-layer heat generating sheet 10 having a heat transfer layer 11 and a heat insulating layer 12 was adopted as a sheet heater 10b as a heat generating sheet. A heat generating sheet having a single layer structure consisting only of the shaped heater 10b, or a heat generating sheet having a desired laminated body may be employed.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a heated automobile seat according to a first embodiment of the present invention, Fig. 2 is an enlarged longitudinal sectional view taken in the direction of the arrow Enlarged cross-sectional view of the direction,
FIG. 4 is an enlarged sectional view of the heat generating sheet in the other direction, FIG. 5 is a plan view of a sheet-shaped heater constituting the heat generating sheet, and FIG.
The figure is a plan view showing a modification of the sheet-like heater, and FIG. 7 is a perspective view of an automatic military heating seat according to a second embodiment of the present invention.
FIG. 8 is an enlarged longitudinal cross-sectional view taken in the direction of the arrows X---- in FIG. Explanation of symbols 10... Heat generating sheet, 10a... Loop-shaped locking part,
10b, 10c... Sheet heater, 11... Heat transfer layer, 12... Heat insulation layer, 14... Metal conductive wire (electrode)
, 16... Linear heating element, 20a, 30a-φ・Seat cushion, 20b. 30bφ... Seat back, 21.31... Main pad, 22~25.32~34.35~37... Trim cover. Applicant: Arakawa Auto Body Industry Co., Ltd. (2 others) Agent: Teru Hase, patent attorney - (1 other person) ...Insulating layer 14...Metal conductive wire (electrode) 1G...Linear heating element 32b. 32c~ 17El '2 0b 0EI '-word> ・1, VIII\? 1 Figure 8 10...Heating sheet 10a...Loop-shaped locking part 10c...Sheet-shaped heater 14...Metal conductive wire (electrode) 16...Linear heating element 30a... Seat cushion 30bl...Seat back

Claims (6)

[Claims] (1) Cover the seat cushion, the seat back, or the main pad constituting both with a trim cover assembly that integrates the outer skin, cover pad, and back base fabric, and cover the seat cushion, the seat back, or the main pad that constitutes both of them with a trim cover assembly that integrates the outer skin, cover pad, and back base fabric, and also is fixed to and buried in a tree wire embedded in the main pad, and the seat cushion,
A heating seat for an automobile in which a heat generating sheet is embedded in the seat back or both, wherein the heat generating sheet is composed of an electrode made of a metal conductive wire and a large number of organic linear heating elements connected to the electrode and arranged in parallel with each other. 1. A heated seat for an automobile, comprising a sheet-like heater, and wherein the heat generating sheet is continuously interposed between the outer skin of the trim cover assembly and the cover pad and is latched to the tree wire. (2) The heated seat for an automobile according to claim 1, wherein the buried portion of each trim cover assembly extends in the longitudinal direction of the seat cushion and the seat back. (3) The heated seat for an automobile according to claim 1, wherein the buried portion of each trim cover assembly extends in the width direction of the seat cushion and the seat back. (4) The heated seat for an automobile according to claim 1, wherein the sheet heater has a parallel wiring structure of an electrode and an organic linear heating element. (5) The heated seat for an automobile according to claim 1, wherein the sheet-like heater has an organic linear heating element as a component of one of the warp and warp threads, and an electrode as a component of the other one of them. (6) The organic linear heating element is a heating element consisting of a core thread and a flexible synthetic resin layer covering the outer periphery of the concentric thread and containing countless conductive particles. Section 4 or Section 5
Heated seats for automobiles as described in Section.