JPH11342037A - Seat having seat surface part by planar elastic body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a seat surface part by easily stretching a planar elastic body into the inside of a frame of a seat frame with suitable tension without variation. SOLUTION: A molded base frame body 3 consisting of an approximately quadrilateral front frame part 30 for holding the circumferential edge of the planar elastic body 2 and rear frame parts 31a to 31c exhibiting an approximately U shape in cross section with the three side of the front frame part 30 is resin molded integrally with the planar elastic body 2 and the seat frame 1 is fitted into the U shape of the three sides from the open end of the molded base frame body 3. The molded base frame body 3 is fitted and fixed to the seat frame 1. The planar elastic body 2 is stretched into the frame of the seat frame 1 by the front frame part 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a seat having a seat portion made of a breathable planar elastic body.

[0002]

2. Description of the Related Art Seats in which a seat portion is formed from a breathable planar elastic body have already been proposed (US Pat. No. 5,011,011).
3,089, 5,533,789, Tokuhyo Hei 8-507
935).

[0003] In this seat, air permeability can be imparted to the seat surface portion by a sheet-like elastic body, and the design is changed from a normal seat. Further, it is preferable that members such as pads and springs necessary for forming a normal seat surface portion can be omitted, and furthermore, the weight can be reduced and the space elastic body can be thinned to improve space efficiency.

In the sheet which has been already proposed, in order to stretch and fix the sheet elastic body in the frame of the seat frame, a resin plate is provided around the peripheral edge of the sheet elastic body and is positioned on the axis of the sheet frame. It is configured to be fitted into the provided groove or to be wound directly around the periphery of the sheet elastic body on the axis of the seat frame and screwed together with the holding plate.

[0005] However, the resin plate is fitted into the groove provided on the axis of the seat frame to fix the terminal of the sheet elastic body, and the peripheral edge of the sheet elastic is directly on the axis of the seat frame. By winding and screwing together with the holding plate, it is difficult to set the planar elastic body to an appropriate tension, maintain a constant tension without any variation, and stretch and fix the elastic within the frame of the seat frame.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a sheet-like elastic body can be set to an appropriate tension, and a sheet-like elastic body can be easily stretched in a frame of a seat frame while maintaining a constant tension without variation. It is an object to provide a seat having a seat portion made of an elastic body.

[0007]

According to a first aspect of the present invention, there is provided a seat having a seating portion made of a sheet-like elastic body, wherein a substantially quadrangular front frame holding a peripheral edge of the sheet-like elastic body is provided. A molded base frame is resin-molded integrally with the planar elastic body from the three sides of the front frame and the back frame having a substantially U-shaped cross section, and the seat frame is three sides from the open end of the molded base frame. The molded base frame is fitted and fixed to the seat frame by being fitted in a U-shape, and the planar elastic body is stretched in the frame of the seat frame by the front frame portion.

In the seat having a seating portion made of a sheet elastic body according to a second aspect of the present invention, a convex portion is provided along at least the longitudinal direction of the side of the seat frame, and a concave groove fitted with the convex portion is formed. It is provided on the inner surface of the U-shape of the molded base frame, and the molded base frame is fitted and fixed to the seat frame by fitting by unevenness.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, the illustrated embodiment is applied to assemble a seat back B and a seat cushion S of a vehicle seat as shown in FIG.

The specific structure will be described with reference to a seat back B. The seat back frame 1 is made of a metal member having a U-shaped cross section as shown in FIG.
a is formed in an inverted U-shape, and the horizontal girder bar 1b is assembled and fixed between the lower ends of the main body frame 1a. The seat back frame 1 is used as a base frame, and the sheet elastic body 2 is stretched inside the frame of the seat back frame 1 to form a seat surface portion.

The plane elastic body 2 is made of a stretchable and breathable cloth. Specifically, those formed of a plurality of elastomer monofilaments interwoven with a plurality of strands of fibrous yarn used for the interior woven fabric, or weaving or knitting a 1000 to 4000 denier elastomer monofilament into a warp or a weft. A woven or knitted fabric having elasticity and breathability can be used.

As shown in FIGS. 2 and 3, a molded base frame 3 is integrally formed with the planar elastic body 2 by resin molding.
The molded base frame 3 has a substantially quadrangular front frame portion 30 that holds the peripheral edge of the planar elastic body 2, and three sides 30 a to 30 c on the left and right sides and an upper portion of the front frame portion 30 and have a U-shaped cross section. Are formed from the back frame portions 31a to 31c. The lower side of the molding base frame 3 is, as shown in FIG.
By molding only Od with resin, it is opened as a fitting opening for the seat back frame 1.

The molding base frame 3 can be formed of a synthetic resin such as polypropylene, and the peripheral edge of the planar elastic body 2 is
It is formed integrally by inserting it within the thickness of 0. In order to mold the molding base frame 3 with a resin, the sheet elastic body 2 is supported by a predetermined tension by clamping the sheet elastic body 2 from around the periphery thereof with a chuck, and the periphery of the sheet elastic body 2 is divided into upper and lower dies. What is necessary is just to carry out injection molding since it is accommodated in the cavity space. After the injection molding, the surplus portion of the planar elastic body 2 can be removed by heat cutting along each edge of the front frame portion 30 so that the terminal does not fray.

In this molding base frame 3, since the front frame portion 30 can take in the peripheral edge of the planar elastic body 2 in the thickness and stretch and support it with a predetermined tension from around the circumference, resin molding can be performed.
The planar elastic body 2 can be set at an appropriate tension, and can be stretched and held in the frame of the front frame portion 30 while maintaining a constant tension without variation.

The molded base frame 3 can be fitted and fixed to the seat back frame 1 by being fitted in a U-shape on three sides from the open end on the lower side, and the planar elastic body 2 can be fixed to the front frame 30. Thus, the seat back frame 1 can be stretched and fixed in the frame. Also, the sheet elastic body 2 may be removed from the seat back frame 1 for the necessity of recycling or the like.
Easy removal by

When the molded base frame 3 is assembled to the seat back frame 1, the peripheral edge of the sheet elastic body 2 is
And is held at a predetermined tension from the circumference by the front frame portion 30, and the molded base frame 3 itself is also formed by the back frame portions 31a to 31c each having a three-sided U-shape. Since it is fitted and fixed to the back frame 1, the sheet elastic body 2 can be stretched and installed in the frame of the seat back frame 1 with a constant tension without variation.

As shown in FIG. 5, the molding base frame 3 is provided with a convex portion 1c along the longitudinal direction of at least both sides of the main body frame 1a, and a concave groove 32 fitted with the convex portion 1c is formed in a U-shape. By being provided on the inner surface of the seat back frame, it is possible to securely fit and fix it so that it does not come off the seat back frame 1 by fitting by unevenness.

Although the above-described embodiment has been described based on the seat back B, the construction of the seat cushion S can be similarly applied. The seat cushion S
Are bracket plates 11a, which are slidably supported by slide rails 10a, 10b as shown in FIG.
11b, the bracket plates 11a, 1
By covering the outer cover 1b with the outer covers 12a and 12b, the front and rear positions can be adjusted similarly to a normal seat. Further, the entire seat can be configured as a reclining seat by providing the reclining mechanism 13 on the bracket plate 11b on one side.

[0019]

As described above, according to the seat having the seating portion made of the sheet elastic body according to the first aspect of the present invention, the seat frame is formed in a U-shape on three sides from the open end of the molded base frame. By fitting the molded base frame into the seat frame and fixing it, and stretching the sheet elastic body into the frame of the seat frame with the front frame part, the sheet elastic body is loosened with an appropriate tension. It can be easily installed inside the frame of the seat frame while maintaining constant tension. In addition, it is possible to easily remove the planar elastic body from the seat frame due to the need for recycling or the like.

According to the seat having the seating portion made of the planar elastic body according to the second aspect of the present invention, the molded base frame is fixedly fitted to the seat frame by fitting the molded base frame by unevenness. At the same time, the planar elastic body can be more securely stretched and fixed within the frame of the seat frame.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing the entire sheet according to the present invention.

FIG. 2 is an exploded perspective view showing a seat back of the seat according to the present invention.

FIG. 3 is a cross-sectional view showing a molded base frame constituting the sheet according to the present invention, taken along a line aa in FIG. 2;

FIG. 4 is a cross-sectional view showing a molded base frame constituting the sheet according to the present invention, taken along the line bb in FIG. 2;

FIG. 5 is a cross-sectional view of the sheet according to the present invention, taken along the line cc in FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 seat frame 2 planar elastic body 3 molded base frame 30 front frame 31 a to 31 c back frame 1 c convex 32 concave

Claims (2)

[Claims] 1. A seat in which a seating surface is formed by a sheet-like elastic body stretched in a frame of a seat frame, wherein a substantially quadrangular front frame holding a peripheral edge of the sheet-like elastic body;
A molded base frame is resin-molded integrally with the planar elastic body from the three sides of the front frame and the back frame having a substantially U-shaped cross section, and the seat frame is cut three times from the open end of the molded base frame. The planar elastic body is characterized in that the molded base frame body is fitted and fixed in the U-shape of the side and fixed to the seat frame, and the planar elastic body is stretched in the frame of the seat frame at the front frame portion. A seat having a body seating portion. 2. A convex portion is provided along at least a longitudinal direction of a side of the seat frame, a concave groove which fits the convex portion is provided on a U-shaped inner surface of the molding base frame, and the molding base frame is formed by unevenness. The seat having a seat portion made of a planar elastic body according to claim 1, wherein the seat is fitted and fixed to the seat frame by fitting.