JPH11266966A - Legless chair incorporating heater and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily take out a sheet-type heater arranged inside of a seat part. SOLUTION: The entitled chair is provided with a chair main body 11 molded of thermoplastic synthetic resin, while the main body 11 has a seat part 11a and a back rest part 11b which are in a hollow state communicated with each other in one body. A sheet-type heater 13 fitted to the upper face of a plate-like cushion material 14 is housed inside of the part 11a along the upper face 11c of the part 11a. An aperture part 11h to insert the heater 13 into the part 11a is formed at the lower tip part of the rear face 11g of the part 11b and the part 11h is covered with a lid 15 fixed to the part 11b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair with a built-in heating element used as a spectator seat in a stand such as a baseball field, and a method of manufacturing the same.

[0002]

2. Description of the Related Art In winter or at night, chairs installed in various facilities are provided with a heating element in a seat or a backrest for heating a seated person. For example, Japanese Unexamined Patent Publication No. Hei 8-205962 discloses a chair with a built-in heating element in which a sheet heating element is provided on a seat and a backrest supported by legs. The chair with a built-in heating element disclosed in this publication has a configuration in which a heating element is integrally embedded in plastic or the like.

Japanese Patent Application Laid-Open No. 9-277360 discloses that when a seat or a backrest of a chair is manufactured by blow molding of a thermoplastic synthetic resin, a planar heating element is provided inside the seat or the backrest. A method for manufacturing a chair with a built-in heating element adapted to be incorporated is disclosed.

In the chairs with a built-in heating element disclosed in these publications, a planar heating element is integrally embedded in a seat or backrest made of plastic such as thermoplastic synthetic resin. There is a problem that it is not easy to take out the planar heating element from the seat or the backrest when performing maintenance or the like of the heating element.

Japanese Patent Application Laid-Open No. 9-28510 discloses an opening provided in a bottom surface of a seat portion supported by a leg, and a plate having a planar heating element attached to an upper surface thereof. There is disclosed a chair with a built-in heating element adapted to be fitted into the chair. In the chair with a built-in heating element having such a configuration, the sheet heating element can be taken out of the seat section by removing the contact plate from the seat when performing maintenance or the like of the sheet heating element. Repairs and the like can be easily performed.

[0006]

Problems to be Solved by the Invention Japanese Patent Application Laid-Open No. 8-20596
As disclosed in Japanese Unexamined Patent Publication No. 9-277360 and Japanese Patent Application Laid-Open No. 9-277360, when a sheet heating element is integrally embedded in a plastic such as a thermoplastic synthetic resin by blow molding or the like, the sheet heating element is used. Must be fixed at a predetermined position in the mold. However, it is not easy to fix the sheet heating element at a predetermined position in a mold filled with a synthetic resin in a molten state, and as a result, the sheet heating element is placed at a predetermined position in a seat or a backrest. There is a risk that the arrangement cannot be reliably performed.

Further, as disclosed in Japanese Patent Application Laid-Open No. 9-28510, a plate provided with a planar heating element on the upper surface is connected to the seat through an opening provided on the bottom of the seat. In the configuration in which the plate is attached and detached, a large space for attaching and detaching the plate is required below the seat. However, a chair used as a spectator seat of a stand in a baseball stadium, an athletic stadium, a ball stadium, or the like is usually attached directly to a base portion of a stepped stand by a pipe or the like. For this reason, a chair without legs is used. For this purpose, Japanese Patent Application Laid-Open No. 9-28
As disclosed in Japanese Patent Publication No. 510, a configuration in which a plate having a planar heating element provided on an upper surface thereof is attached to and detached from the seat through an opening provided on the bottom of the seat is provided. A large space for attaching and detaching the plate is required below. Therefore, in the seat chair attached to the support pipe provided on the base portion of the stand, there is only a little space below the seat portion, and the plate attached with the planar heating element is attached to the seat portion. On the other hand, there is a problem that it is not easy to attach and detach.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to replace a sheet heating element arranged in a seat not supported by a leg portion with a maintenance of the sheet heating element. An object of the present invention is to provide a seat with a built-in heating element that can be easily taken out of a seat. Another object of the present invention is to provide a method for manufacturing a seat-chair with a built-in heating element, which can reliably arrange a planar heating element at a predetermined position in a seat portion.

[0009]

According to a first aspect of the present invention, a seat with a built-in heating element according to the present invention is configured such that a hollow seat portion and a backrest portion which are mutually communicated are integrally formed of a thermoplastic synthetic resin. At the same time, the lower end of the back of the backrest is provided with an opening through which the sheet heating element can be inserted into the seat. The sheet heating element is housed in the upper part of the seat in a pressure contact state. Be done.

According to a second aspect of the present invention, there is provided a seat chair with a built-in heating element, wherein a hollow seat portion and a backrest portion, which are mutually communicated, are integrally formed of a thermoplastic synthetic resin. On the bottom surface of the seat, a seat heating element is provided with an opening in which the sheet heating element can be inserted only in an inclined state with respect to the seat, and the sheet heating element is pressed against the upper part of the seat. Be accommodated.

According to a third aspect of the present invention, in the seat chair with a built-in heating element, the planar heating element is mounted on an upper surface of a cushion material which is vertically compressible in the seat.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a seat with a built-in heating element according to the present invention, after forming a hollow seat portion and a backrest portion which are mutually communicated by blow molding of a thermoplastic synthetic resin. The planar heating element is disposed in the seat through an opening formed in the seat or the backrest.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an example of an embodiment of a seat with a built-in heating element according to the present invention, FIG.
FIG. 3 is a plan view thereof, and FIG. 4 is a rear view thereof.

The seating chair 10 with a built-in heating element is designed to be used as a spectator seat arranged on a stand such as a baseball stadium, an athletic stadium, and a ballpark. It is adapted to be directly attached to a pair of supporting pipes 20 which are arranged at an appropriate distance from each other on the base portion, and thus no legs are provided. The seating chair 10 with a built-in heating element has a chair body 11 having a seat portion 11a and a backrest portion 11b which are hollow and communicate with each other by blow molding of a thermoplastic synthetic resin.

The seat portion 11a of the chair body 11 is supported by the pair of support pipes 20 in a state where the front portion is slightly inclined with respect to the horizontal so that the front portion is located slightly above. A back portion 11b is integrally provided at a rear portion of the seat portion 11a so as to extend upward while being slightly inclined backward with respect to the vertical. The interiors of the seat 11a and the backrest 11b, each of which is formed as a hollow body, communicate with each other at the rear of the seat 11a and the lower end of the backrest 11b.

The upper surface 11c of the seat portion 11a is configured such that the central portion is slightly depressed with respect to the left and right sides. As shown in FIG. 2, the bottom surface 11 d of the seat portion 11 a has left and right side edges and front and rear side edges each protruding downward, and a central portion of the bottom surface 11 d has left and right protruding left and right portions. A pair of supporting protrusions 11e are provided at appropriate intervals from each side edge, and project downward from each other along the front-rear direction, and are provided at appropriate intervals from each other. A fixing bracket 12 for fixing the chair body 11 to each support pipe 20 (see FIG. 1) is attached to each support protrusion 11e. Each fixing bracket 12 has a bottom surface 11d in the seat portion 11a.
Are bolted to a pair of insert nuts 11k provided on the respective support protrusions 11e.

Inside the seat portion 11a, a flat cushioning material 14 having a flat heating element 13 having a thickness of about 2 to 3 mm and attached on the upper surface is accommodated. For example, the planar heating element 13 is formed by bending a linear heating element such as a carbon or nichrome wire on at least one side of an aluminum foil and disposing the planar heating element, or disposing a planar heating element. It is constituted by covering the element with a protective body. The sheet heating element 13 is provided with a cord 13a for energizing the heating element. The cushion material 14 on which the planar heating element 13 is attached on the upper surface is made of urethane foam, rubber, or the like.
It is configured to be elastically deformable and is easily compressed vertically.

The cushion member 14 to which the sheet heating element 13 is attached is housed in the seat 11a, and a flat surface between a pair of supporting protrusions 11e, each of which projects downward, on the bottom surface 11d of the seat 11a. And a planar heating element which is vertically compressed between a flat surface between each supporting protrusion 11e and each of left and right side edges projecting downward and an upper surface 11c of the seat 11a. 13 is supported in a state of being pressed against the upper surface 11c of the seat 11a.

The front surface 11f of the backrest portion 11b provided integrally with the seat portion 11a is curved so that the left and right side edges protrude forward while being slightly inclined with respect to the vertical. The upper side edge of the back surface 11g of the backrest 11b projects rearward. The back 1 of the backrest 11b
1g, the left and right side edges protrude rearwardly in an arc shape, and between the side edges protruding in an arc shape, as shown in FIGS. An opening 11h for inserting the sheet heating element 13 into the seat 11a is provided.
It is provided along the horizontal direction. This opening 11h
Is open obliquely rearward and downward, and its opening 11h is covered with a lid 15 made of, for example, an iron plate. The lid 15 is fixed to the back of the backrest 11b by tapping screws or rivets. A cord 13 a connected to the sheet heating element 13 penetrates through the center of the lid 15.

The chair 10 with a built-in heating element having such a configuration.
When the chair body 11 each having the hollow seat portion 11a and the backrest portion 11b is formed by blow molding of a thermoplastic synthetic resin such as high-density polyethylene, the pair of fixing brackets 12 form the seat portion 11a. Bottom 11d
Nut 11 of each supporting projection 11e
bolted to k. Then, the cushion member 14 having the planar heating element 13 attached to the upper surface thereof is inserted from an opening 11h provided at the lower end of the back surface of the backrest 11b, and is disposed on the bottom surface 11d of the seat 11a. At this time, the cushion material 14 is in a vertically compressed state, and the planar heating element 13 provided on the upper surface is provided.
Are pressed against the upper surface 11c of the seat portion 11a and positioned.

When the cushion member 14 to which the sheet heating element 13 is attached is disposed inside the seat 11a, the lid 15 in a state where the cord 13a of the sheet heating element 13 penetrates,
It is mounted so as to cover the opening 11h provided in the backrest 11b. Thus, the chair 10 with a built-in heating element of the present invention is obtained.

The chair 10 with a built-in heating element is composed of a pair of supporting pipes 20 provided on a stand such as a baseball field.
Then, each fixing bracket 12 is attached and fixed. Then, if necessary, the sheet heating element 13 is energized, and the sheet heating element 13 generates heat. In this case, the planar heating element 13 generates heat in a region of the seat 11a indicated by a two-dot chain line in FIG. 3, and the upper surface 11c of the seat 11a is heated. The planar heating element 13 is provided on the upper surface 11c of the seat 11a.
, The upper surface of the seat portion 11a is efficiently heated, and the body of a seated person is efficiently heated.

Sheet heating element 13 arranged in seat 11a
In the maintenance or the like, the lid 15 attached to the back surface 11g of the backrest 11b is removed, the opening 11h is opened, and the cushion material 14 arranged in the seat 11a is taken out through the opening 11h. . Then, maintenance or the like of the sheet heating element 13 is performed.

In this seat 10 with a built-in heating element, the opening 11h is provided at the lower end of the back of the backrest 11b, so that the strength of the backrest 11b itself is reduced. Since the lid 15 made of an iron plate or the like covering the opening 11h is attached to the lower end, the backrest 11b is reinforced by the lid 15.

FIG. 5 is a partially cutaway sectional view showing another embodiment of the seat with a built-in heating element of the present invention, and FIG. 6 is a partially cutaway bottom view thereof. In this seat 10 with a built-in heating element,
The bottom surface 11d of the seat 11a has front and rear side edges and left and right side edges projecting downward, respectively, and is surrounded by these front and rear side edges and left and right side edges. The central portion is a flat surface slightly inclined with respect to the horizontal so that the front portion is located upward.

A pair of insert nuts 11k (see FIG. 6) are provided at the left and right side edges of the bottom surface 11d of the seat portion 11a, which project downward, to a fixing bracket attached to a support pipe provided on the stand. But,
They are provided at appropriate intervals in the front-rear direction.

At the center of the bottom surface 11d of the seat portion 11a, three hemispherical ribs 11m projecting upward along the respective front and rear side edges are equally spaced in the left-right direction. Each is provided. Also, the seat 11
At the center in the front-rear direction on the bottom surface 11d of a, three hemispherical ribs 11m each protruding upward,
They are provided at equal intervals in the left-right direction. Heating element insertion openings 11n are provided along the left-right direction between the center portion and each of the front and rear side edges on which the ribs 11m are provided on the bottom surface 11d of the seat portion 11a.

A planar heating element 13 supported on each rib 11m provided on the bottom surface 11d is disposed inside the seat 11a. The planar heating element 13 is supported by the ribs 11m and is in pressure contact with the upper surface 11c of the seat 11a. Note that the sheet heating element 13 is disposed inside the seat 11a in a state where the sheet heating element 13 is attached to the upper surface of the cushion material as in the above-described embodiment.
You may make it press-contact reliably with the upper surface 11c of 1a.

On the bottom surface 11d of the seat 11a, a cover 17 made of synthetic resin for covering the heating element insertion opening 11n is attached by tapping screws or rivets 18.

The chair 10 with a built-in heating element having the above-described structure.
When the chair body 11 having the hollow seat portion 11a and the backrest portion 11b, respectively, is formed by blow molding of a thermoplastic synthetic resin such as high-density polyethylene, the pair of fixing brackets is attached to the bottom surface of the seat portion 11a. 11d is bolted to the insert nut 11k (see FIG. 6).

In such a state, the sheet heating element 13
Is inserted into the seat 11a in an inclined state from one of the heating element insertion openings 11n provided on the bottom 11d of the seat 11a so as to be at a predetermined position on the bottom 11d of the seat 11a. Positioning is performed using the heating element insertion openings 11n. The planar heating element 13 is supported by the ribs 11m, and is brought into pressure contact with the upper surface 11c of the seat 11a. Thereafter, the cover 17 is attached to each of the heating element insertion openings 11.
n, and is attached to the bottom surface 11d of the seat 11a by the rivet 18.

The seat 10 with a built-in heating element is also provided on the bottom surface 11d of the seat 11a with the cover 17 removed for maintenance of the sheet heating element 13 disposed in the seat 11a. Each of the heating element insertion openings 11n is opened, and the planar heating element 13 disposed in the seat 11a is moved to the seat 11a by utilizing a space below the seat 11a supported by a pipe or the like. Through one of the heating element insertion openings 11n provided on the bottom surface 11d of the above, it is taken out in an inclined state.

[0034]

According to the seating chair with a built-in heating element of the present invention, since the sheet heating element can be easily attached to and detached from the seat, it is attached to a baseball field stand or the like. In this state, maintenance of the sheet heating element can be easily performed.
Further, according to the method for manufacturing a seat chair with a built-in heating element of the present invention, after the seat and the backrest are integrally formed by blow molding of a thermoplastic synthetic resin, the sheet heating element is arranged in the seat. In addition, the planar heating element can be reliably arranged at a predetermined position inside the seat.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of an embodiment of a seat with a built-in heating element of the present invention.

FIG. 2 is a cross-sectional view thereof.

FIG. 3 is a plan view thereof.

FIG. 4 is a rear view thereof.

FIG. 5 is a partially cutaway side view showing another embodiment of the seat with a built-in heating element of the present invention.

FIG. 6 is a partially cutaway bottom view.

[Explanation of symbols]

 Reference Signs List 10 Chair with built-in heating element 11 Chair body 11a Seat 11b Backrest 11c Top surface 11d Bottom surface 11e Supporting projection 11f Front 11g Back 11h Opening 11k Insert nut 11m Rib 11n Heating element insertion opening 12 Fixing bracket 13 Heating element 14 Cushion material 15 Lid

Claims (4)

[Claims] 1. A hollow seat portion and a backrest portion, each of which communicates with each other, are integrally formed of a thermoplastic synthetic resin, and a planar heating element is provided in the seat portion at the lower end of the back surface of the backrest portion. A seating chair with a built-in heating element in which a planar heating element is housed in a press-contact state at an upper portion in a seat portion of a sitting chair provided with an opening into which the opening can be inserted. 2. A hollow seat portion and a backrest portion, each communicating with each other, are integrally formed of a thermoplastic synthetic resin, and a planar heating element is provided on the bottom surface of the seat portion within the seat portion. A seating chair with a built-in heating element, wherein a sheet heating element is accommodated in an upper part of the seat in a pressure-contact state, the seating chair having an opening that can be inserted only in an inclined state with respect to the seat. 3. The seating chair with a built-in heating element according to claim 1, wherein the planar heating element is attached to an upper surface of a cushion material that can be compressed in a vertical direction in a seat portion. 4. After forming a hollow seat portion and a backrest portion communicating with each other by blow molding of a thermoplastic synthetic resin, the sheet heating element is passed through an opening formed in the seat portion or the backrest portion. A method of manufacturing a seat chair with a built-in heating element, wherein the chair is disposed in a seat portion.