JPH07114739B2 - Heating seats for cars - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heating seat for an automobile, and in particular, it integrates three members of a skin, a cover pad and a backing cloth, and at a plurality of predetermined portions of the cover pad. A seat cushion, a seat back, or a main pad constituting both of them is covered with a trim cover assembly formed by inserting a hook button from the skin side into a provided recess, and the seat cushion, the seat back, or these. The present invention relates to a heating seat for an automobile in which a heat generating sheet is embedded in both sides.

[Prior art]

Generally, in a heating seat for an automobile of this type, a heating element in which one nichrome wire multi-metallic heating wire is arranged in a meandering shape is adopted as a heating element which is a main constituent member of the heating sheet. It is designed to generate heat electrically when connected.

Japanese Utility Model Laid-Open No. 59-72691 discloses a heating seat of a type similar to the heating seat, in which a heat generating seat is interposed between the skin and the main pad. Then, in the heat generating sheet, a large number of Umebachi-shaped cutout holes for inserting the hook button are provided at predetermined positions, and the hook button is inserted from the epidermis side.

[Problems to be solved by the invention]

By the way, in such a heating seat, the heating element of the heating sheet is made of a metal heating wire such as a nichrome wire, and is arranged in a meandering shape bypassing each insertion hole of the hook button. For this reason, if the pitch interval of each hook button becomes narrow, the arrangement density of the metal heating wires becomes sparse, and the heating function of the seat may be impaired. In addition, a heat-generating sheet using a metal heat-generating wire as a heat-generating body is inferior in flexibility to a cloth or the like and has poor followability to irregularities on the surface of the main pad. Will be inferior to.

Therefore, an object of the present invention is to solve the above-mentioned problems in a heating seat for an automobile of the type described above and provide a seat having 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, 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 in parallel to each other. Equipped with a sheet heater
Further, the heat generating sheet is continuously interposed between the outer skin and the cover pad of the trim cover assembly, and the respective hook buttons are inserted therethrough.

Then, in the heating seat for an automobile according to the present invention,
The seat cushion and seat back skins are recessed in the cover pad recesses at the hook button inserts, creating a three-dimensional seat with a raised space between the inserts. The heat generating sheet preferably has the following constitution. That is, (1) the sheet heater has a parallel wiring structure of electrodes and organic linear heating elements.

(2) The sheet heater uses the organic linear heating element as one of the components of the warp and weft and the electrode as the other component of the warp and weft.

(3) The organic linear heating element is a heating element including a core yarn and a flexible synthetic resin layer that covers the outer circumference of the core yarn and innumerable conductive particles are mixed.

[Operation and effect of invention]

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

Further, in the heating seat, the heating element, which is a main constituent member of the heating sheet, has flexibility, bending fatigue resistance, wear resistance,
Since it is another organic linear heating element having excellent mechanical strength, the heating sheet itself has the same characteristics.
Therefore, even if the heating seat is mounted on an automobile and used under severe conditions, the heating seat can sufficiently retain the heating function for a long period of time.

Furthermore, in the heating seat, since the heat generating sheet has flexibility and stretchability equivalent to or close to that of the skin forming the trim cover assembly, the heat generating sheet has good followability to unevenness of the cover pad. The unevenness is sufficiently exposed on the skin side, and the seat cushion and the seat back have a three-dimensional surface effect and are excellent in design. Further, in such a heat generating sheet, since it is possible to freely insert the respective hook buttons between the linear heat generating elements arranged in parallel, there is no fear that the arrangement density of the heat generating elements becomes sparse as in the conventional case, and the heating function of the seat is provided. Sufficiently granted.

〔Example〕

The first embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows a heating seat for an automobile according to an embodiment of the present invention. In the seat, the heat generating seat 10 is embedded in both the seat cushion 20a and the seat back 20b that form the seat. In the seat cushion 20a, the main trim cover 21 and the side trim covers 22 to
A trim cover assembly consisting of 24 is provided, and the main pad 25 is covered with this assembly as shown in FIG. Each trim cover is formed by integrating a skin, a cover pad, and a backing cloth, and a heat generating sheet 10 is embedded between each skin and the cover pad.

FIG. 2 shows a partial vertical cross section of the main trim cover 21 in the seat cushion 20a. The main trim cover 21 is composed of an outer skin 21a, a cover pad 21b and a backing base cloth 21c. As shown in FIG. 3, the cover pad 21b is formed in an uneven shape having linear recesses 21b1 and 21b2 orthogonal to each other in the vertical and horizontal directions and a large number of circular recesses 1b3 located at these orthogonal parts, and each circular recess The bottom of the place 21b3 is provided with an insertion hole 21b4 into which the hook button 26a is inserted. In such a cover pad 21b, as shown in FIG. 4, the heat generating sheet 10 is sewn along the surface thereof, and then the heat generating sheet 10 is interposed between the outer skin 21a and the back base cloth 21c to integrally sew them together. Or
Outer skin 21a sewn on the back of the preheating sheet 10 and the backing cloth 2
These are sewn together by interposing between 1c. This constitutes the main trim cover 21, but the hook button 26
The button 26a is inserted through and the button 26a is fitted to the hook spring 26b located on the back surface of the back base fabric 21c. As a result, the portion of the cover 21a corresponding to each circular recess 21b3 of the cover 21a is depressed, and the surface of the seat cushion 20a has a three-dimensional appearance and is excellent in design. The same applies to the seat back 20b.

As shown in FIGS. 5 and 6, the heat generating sheet 10 mainly includes a sheet-shaped heater 10a, a heat transfer layer 11 laminated on the front surface of the heater 10a, and a heat insulating layer 1 laminated on the back surface of the heater 10a.
It has a three-layer structure consisting of two. Sheet heater 1
0a is a normal synthetic fiber such as polyester, polyamide,
As shown in FIG. 7, it is a cloth-like material that uses synthetic fibers such as polyolefin and polyacrylic as warp and wefts, and as shown in FIG. A large number of organic linear heating elements 16 provided with metal conductive wires 14 and arranged in parallel at a predetermined weaving density in a large number of wefts 15 made of synthetic fibers. Each metal conductive wire 14
In (1), it is connected to the battery 27 mounted on the automobile through the lead wires connected to these terminals and functions as an electrode.

The metal conductive wire 14 functioning as an electrode is composed of a thin wire of copper or other conductive metal, metal plating, or a variety of metal-coated fiber yarns such as sputtered flat fibers. In particular, the metal-coated fiber yarn is excellent in flexibility and therefore suitable as the metal conductive wire of the present invention. Although one of these thin wires and yarns functions as an electrode, it is preferable to arrange a plurality of them in parallel from the viewpoint of durability and safety. In addition, as the metal conductive wire 14, a rustproofed wire or a highly flexible twisted wire is also suitable.

The organic linear heating element 16 is a heating element including a core yarn and a flexible synthetic resin layer that covers the outer periphery of the core yarn and innumerable conductive particles are mixed. In such a linear heating element 16, the core yarn is an ordinary synthetic fiber such as polyamide, polyester,
Threads made of synthetic fibers such as polyolefin and polyacrylic are used. When a synthetic fiber having a clear melting point at a predetermined temperature is selected from these synthetic fibers, the core yarn exhibits a thermal fuse function. Although powdery carbon represented by carbon black is mainly used as the conductive particles, metal powder may be used together with or in place of the powdery carbon. Regarding the particle size of such particles, kneading property,
It is not limited in any way as long as it is in a fine powder state so that the coating property is not hindered, but it is usually preferably about 20 to 40 mμ. Although the conductive particles are mixed in the flexible synthetic resin, it is suitable for the present invention to incorporate a substance such as ceramic powder having an 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 dispersion layer of ceramic powder. The flexible synthetic resin that supports the conductive particles is preferably a flexible synthetic resin that has relatively little heat deterioration and has binder properties (adhesiveness), such as polyurethane, polyacryl, and polybutyral. Mention may be made of synthetic resins. A flexible synthetic resin layer is formed by coating and carrying such a resin on the outer periphery of the core yarn. When the linear heating element 16 is provided with both desirable mechanical properties and heat generation properties, the mixing ratio of the conductive particles and the flexible synthetic resin is 5 to 15 parts by weight, preferably 7 to 100 parts by weight of the resin. ~ 12 parts by weight. Further, the resistance value of the linear heating element 16 is preferably adjusted to about 12 to 14 kΩ / m.

The sheet-shaped heater 10a is formed into a sheet by using the metal conductive wire 14 and the linear heating element 16 described above as a part of the warp and weft, and is formed into a cloth using, for example, an ordinary loom. The sheet-shaped heater 10a has flexibility similar to that of a normal cloth, and the amount of heat generated by the sheet-shaped heater 10a increases as the distance between the electrodes of the metal conductive wires 14 (electrodes) arranged in a plurality of rows decreases. It increases as you do. Therefore, by adjusting both of these requirements, the heat generation amount of the sheet-shaped heater 10a can be adjusted, and the heater 10a generates uniform Joule heat from the entire surface thereof.

The heat generating sheet 10 includes a heat transfer layer 11 on the surface of the sheet heater 10a. Heat transfer layer 11 is for uniformly distributing and transmitting the heat of the sheet-shaped heater 10a to the surface side thereof, and its constituent members are substances having excellent heat transfer characteristics, for example, metals, metal oxides, other inorganic compounds such as Ceramics or the like is selected. When a conductive substance is used among these, the substance is laminated on the surface of the sheet-shaped heater 10a via an electrically insulating substance such as fiber or resin. When the heat transfer layer 11 is made of a metal or a metal oxide, these can be laminated on the sheet-shaped heater 10a by a coating means such as plating or sputtering. The sheet-shaped article coated with can be laminated on the sheet-shaped heater 10a via an adhesive. Heat transfer layer 11
When is made of ceramics, the emissivity of far infrared rays is increased to transfer heat more effectively. For example, when a ceramic powder dispersion layer is laminated, an excellent thermal effect is exhibited.

The heat generating sheet 10 includes a heat insulating layer 12 on the back surface of the sheet heater 10a. The heat insulating layer 12 prevents the heat from the sheet-shaped heater 10a from being dissipated, and a heat insulating member such as a resin sheet, a foam, an appropriate fiber sheet, or a knitted fabric is appropriately selected as its constituent member. In this heat insulating layer 12, it is preferable to provide a metal coating surface having a radiant heat reflecting function on one side surface. In this case, the heat insulating layer 12 is laminated so that the metal coating surface faces the back surface of the sheet-shaped heater 10a. Preferably. In addition, as a constituent member of the heat insulating layer 12, it is possible to adopt a material having a coating layer of metal, metal oxide or the like,
In these cases, it is laminated on the back surface of the sheet-shaped heater 10b via an insulating material as needed.

In the heating seat for an automobile having such a configuration, the heat generating sheet
Although a large number of organic linear heating elements 16 constituting the sheet-shaped heater 10a of 10 electrically generate heat and exert a heating function, the heat-transfer layer 11 is provided on one side surface of the sheet-shaped heater 10a and the heater 10b Since the heat insulating layer 12 is provided on the other side surface, the heat of the heater 10a can be prevented from being dissipated to the other side surface of the heat generating sheet 10 and can be evenly distributed and transmitted to the one side surface. Further, since the heat generating seat 10 is interposed between the outer skin of each trim cover 22 to 25 and the cover pad, the heat of the seat 10 is efficiently transmitted to the front side of the seat cushion 20a and the seat back 20b. Therefore, in the heating seat, the surfaces of the seat cushion 20a, the seat back 20b, etc. are sufficiently heated.

Further, in the heating seat, since the heating element which is a main constituent member of the heating sheet 10 is the organic linear heating element 16 which is excellent in flexibility, bending fatigue resistance, wear resistance, and other mechanical strength. The heat generating sheet 10 itself has the same characteristics. Therefore, even if the heating seat is mounted on an automobile and used under severe conditions, the heating seat can sufficiently retain the heating function for a long period of time.

Furthermore, the linear heating element 16 in the heating sheet 10 rarely damages the sewing needle during sewing, and even if a small number of heating elements arranged in parallel are damaged or cut, the heating sheet 10 as a whole is Does not impair the fever function.
Therefore, the outer skins 21a to 24a forming the trim covers 21 to 24
The heat generating sheet 10 is interposed between the cover pads 21b to 24b and the back base cloths 21c to 2 constituting the trim cover of these three members.
4c and can be sewn in any direction.

Furthermore, in the heating seat, since the heat generating sheet 10 has flexibility and stretchability equivalent to or close to that of the skin that constitutes the trim cover assembly, the heat generating sheet 10 is not affected by the unevenness of the cover pad 21b. The followability is good, and the unevenness is sufficiently exposed to the skin 21a side, and the seat cushion 20a and the seat back 20b have a three-dimensional surface effect and are excellent in design. Further, in the heat generating sheet 10, the linear heating elements 16 in which the hook buttons 26a are arranged in parallel are provided.
Since the spaces can be freely inserted, the array density of the heating elements 16 does not become sparse as in the conventional case, and the seat heating function is sufficiently provided.

In the above embodiment, the sheet-shaped heater 10a has the three-layered heat-generating sheet 10 including the heat transfer layer 11 and the heat insulating layer 12 as the heat-generating sheet. A heat generating sheet having a single-layer structure composed only of 10a, or a heat generating sheet having a desired laminated body can be adopted.

[Brief description of drawings]

1 is a perspective view of a heating seat for an automobile according to a first embodiment of the present invention, FIG. 2 is an enlarged vertical sectional view taken along the line II-II in FIG. 1, and FIG. 3 shows a main trim cover. FIG. 4 is a perspective view of the cover pad constituting the same, FIG. 4 is a perspective view of a state in which a heat generating sheet is sewn onto the cover pad, FIG. 5 is an enlarged sectional view of the heat generating sheet in one direction, and FIG. FIG. 7 is a plan view of a sheet-like heater that constitutes the heat generating sheet. Explanation of reference numerals 10 …… heating sheet, 10a …… sheet heater, 11 …… heat transfer layer, 12 …… heat insulating layer, 14 …… metal conductive wire (electrode), 16…
… Linear heating element, 20a …… Seat cushion, 20b …… Seat back, 21 …… Main trim cover, 21a …… Skin, 2
1b …… Cover pad, 21c …… Back base cloth.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeo Yagi 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Automobile Co., Ltd. (72) Inventor Masao Nissho 2-2 Nihombashi Muromachi Chuo-ku, Tokyo Toray Co., Ltd. (56) References Actually open Sho 59-72691 (JP, U) Actually open 58-191857 (JP, U)

Claims (4)

[Claims] 1. A trim cover formed by integrating three members of an outer skin, a cover pad and a backing cloth, and inserting hook buttons from the outer skin side into recesses provided in a plurality of predetermined portions of the cover pad. In a heating seat for an automobile, which is formed by covering a seat cushion, a seat back, or a main pad constituting both of them with an assembly, and a heating sheet is embedded in the seat cushion, the seat back, or both of them, the heating sheet is A sheet-shaped heater 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 to each other is provided, and the heating sheet is provided between the skin and the cover pad of each trim cover. A heating seat for an automobile, characterized in that the hook buttons are inserted in succession and are inserted therethrough. 2. The heating 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. 3. A heating seat for an automobile according to claim 1, wherein the sheet-shaped heater uses an organic linear heating element as one component of the warp and weft and an electrode as the other component thereof. . 4. The organic linear heating element is a heating element comprising a core and a flexible synthetic resin layer covering the outer periphery of the core and innumerable conductive particles mixed therein. The heating seat for an automobile according to item 2 or 3.