JPH0751146A - Seat back with side support device and its production - Google Patents

Abstract

PURPOSE:To prevent the formation of wrinkles and slack on the flanks of the seat back by providing the flank parts forming the flanks of the seat in a side support part with slits in a vertical direction. CONSTITUTION:A front surface body 10 and rear surface body 11 of a cushion body 1 are made integrally to adhere to each other on the upper parts and the lower parts are disconnected without adhering in such a manner that the slits S are formed. The front surface body 10 is provided with the side support part 10B. The side support 10B is composed of a pressing part 10B1 disposed in a build-up form on a seat part 10A side and a front side surface 10B-2 forming the front flank of the seat back. Consequently, the movement of the part to be disposed on the rear side of the seat back of the cushion body is prevented by the slits S at the times of moving the side frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat back (back portion) with a side support device in a vehicle seat (seat) and a method for manufacturing the same.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a conventional seat back with a side support device. In such a seat back, a side frame (4) is moved inward and outward by operating a side support device, and a central portion ( The distance between the side portions (B) provided on the left and right of (A) is adjusted to be wide and narrow.

The side frame (4) is pivotally attached to the left and right of the frame (30) so as to be rotatable forward, and the side support (10B) made of foam straddles the side frame (4). The side support portion (10B) is disposed on the seat portion (10B) that constitutes the central portion (A).
A) and the back and back part (10) which constitutes the back and back side of the seat back.
It is foam-molded integrally with C).

In FIG. 4, (5) is a reinforcing cloth integrally provided on the back surface of the seat (10A), etc., (20) is a body part of the skin covering the seat (10A), and (21) ) Is a frame portion and a gusset portion of the skin that covers the side support portion (10B), (22) is a back gusset portion of the skin that constitutes the back and back of the seat back, and (31) is a spring supporting the seating portion (10A). The support members are shown respectively.

[0005]

In the conventional product shown in FIG. 4, when the side frame (4) of the side support device is moved inwardly of the side portion (B) to hold the body of the seated person, The part (B) changes from the position indicated by the chain line to the position indicated by the solid line. At this time, since the side support (10B) is moved inward by the side frame (4), the back support (1) that is integral with the side support (10B) is formed.
0C) is drawn from the position of the chain line to the position of the solid line.
Then, when the side part (B) is returned to the position of the original chain line, the back back part (10C) is held by the back gusset part (22) of the epidermis, so that it does not return to the position of the original chain line, The back side (10C) side of the side support (10B) is loosened. Therefore, there is a problem that wrinkles and lumps occur in the gusset portion (21A) of the skin which covers the side support (10B) and constitutes the side surface of the seat back. Therefore, the present invention aims to eliminate such defects in conventional products.

[0006]

SUMMARY OF THE INVENTION To achieve the above object, the present invention comprises a side support portion which is provided on the left and right of a seating portion and straddles a side frame of a side support device, and the side back portion is integrally formed with the side support portion. In a seat back having a foam cushion body composed of a back and back portion, a slit is provided in a vertical direction in a side surface portion that constitutes a side surface of the seat in the side support portion. The method is to form the rear side of the side part and the back side part separately from the front side of the side part of the seating part and the side support part with different hardness, and then integrally bond the part excluding the slit formation. It is made by using a cushion body made of.

Since the foam side support part movable by the side frame of the side support device is separated from the back back part by the slit, the back back part does not move by the movement of the side frame.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a cushion body (1) made of foam (urethane foam) that constitutes a seat back with a side support device according to the present invention. The cushion body (1) includes a front body (10) and this front body. It is composed of a rear body (11) made of foam which is hard and has a high density with respect to (10). The front body (10) and the rear body (11) are integrally bonded at the upper portion and the slit (at the lower portion). S) is formed without being bonded so that it is separated.

The above-mentioned front body (10) is formed integrally with the seating portions (10A) (10A ') for supporting the back of the seated person and the seating portion (10A), and the side support device shown in FIG. A side support part (10) that straddles the side frame (4) and holds the side part of the upper half of the body of the seated person.
B) and the side support portion (10B) includes a pressing portion (10B-1) provided in a raised shape on the seating portion (10A) side, and a front side surface portion (1) that forms a front side surface of the seat back.
0B-2).

On the other hand, as shown in FIG. 2, the rear face body (11) forms a rear side face portion (1) which forms the rear face side of the seat back.
1B) and the back side portion (1B) which is connected to the rear side surface portion (11B) at a substantially right angle and is disposed on the back side of the seat back.
1C) and the upper seating portion (10) of the front body (10).
A ') and an upper part (11d) integrally bonded with an adhesive, and the back side (11C) is also formed on the back side of this upper part.
Is molded.

Therefore, the front body (10) and the rear body (1)
As shown in FIG. 3, the frame (30) and the side frame (4) are encapsulated by the cushion body (1) composed of 1), and the cushion body (1) is a bag-like sewn skin (20). (21) Covered with (22) to form a seat back.

As shown in FIG. 2, the cushion body (1) is formed by separately molding the front body (10) and the rear body (11), and then forming the front side surface portion (10B-) of the front body (10). Except for the lower part of 2) and the lower part of the rear side surface part (11B) of the rear surface body (11) shown in (11B ') and (11B') in the figure, the slits (S Forming a cushion body (1). In FIG. 2, (11A) in the drawing is a through hole provided in the rear surface portion (11), and this through hole (11A) is located in the upper seating portion (10A ') from the seating portion (10A) of the front surface portion (10). It is formed in the same shape as the lower part.

FIG. 3 shows a seat back with a side support device assembled by using the cushion body (1) molded by the method shown in FIG. 2, and the side support device pivotally attached to the frame (30). The side frame (4) which constitutes (1) is rotated in the width direction by operating a side support device (not shown) as in the conventional case. And, the cushion body (1) has a bag-like skin (2
0) (21) (22), the skin (2
A ball edge (21A) is provided in a portion of 1) corresponding to the slit (S) of the cushion body (1).

In FIG. 3, (A) is a central portion for supporting the back of a seated person, (B) is provided on the left and right of the central portion (A),
The side portions (B) whose left and right distances are adjusted to be wide and narrow by the movement of the side frame (4) are shown respectively, and the side portions (B) shown by the solid line hold the body of the seated person from the state shown by the chain line. The cushion body (1) in which the front body (1
Since the side support part (10B) of (0) is moved inward by the side frame (4), the width of the slit (S) provided between the side support part (10B) and the rear face body (11) becomes wide. Then, the rear surface body (11) of the cushion body (1) is held in a fixed state by the slit (S).

Next, as shown by the chain line in FIG. 3, when the space between the side portions (B) is widened by operating the side support device, the side frame (4) causes the front body (10) of the cushion body (1) to move. Side support part (1
0B) is movable, but the rear face body (11) is not movable due to the slit (S), and the width of the slit (S) becomes narrow. In FIG. 3, (5) in the figure is a cushion body (1).
Reinforcing cloths (31) provided on the inner surface of the springs are spring supporting members, respectively.

[0016]

According to the seat back with the side support device of the present invention, when the side support device is operated to move the side frame, the portion of the cushion body disposed on the back and back side of the seat back is moved by the slit. There is nothing to do. Therefore, unlike the conventional products, wrinkles and lumps that deteriorate the appearance quality of the seat back do not occur on the side surface of the seat back.

According to the method of manufacturing the seat back with the side support device of the present invention, the cushion body constituting the seat back is provided on the front side surface portion located on the front side of the side surface portion of the side support portion which is a portion movable by the side support device. On the other hand, the rear side surface portion located on the rear side of the same side surface portion and the back and back portion are molded separately and with different hardness, and then the portion excluding the slit forming portion is integrally bonded. Therefore, since the cushioning surface that is comfortable and soft can be used to mold the seating surface side, and the cushioning material that has excellent shape retention can be used to mold the back and back sides of the seat back, a seat with a side support device that is excellent in usability and shape retention can be formed. The bag can be manufactured.

[Brief description of drawings]

FIG. 1 is a perspective view of a cushion body used in the present invention.

FIG. 2 is an exploded perspective view of a cushion body used in the present invention.

FIG. 3 is a cross-sectional view showing a main part of the present invention.

FIG. 4 is a sectional view of a conventional seat back with a side support device.

[Explanation of symbols]

 1 Cushion body 4 Side frame of side support device 10A Cushion body seating portion 10B Cushion body side support portion 10B-2 Side support side surface portion 10C Cushion body back surface S Slit

Claims (2)

[Claims] 1. A cushion body made of a foam material, which is provided on the left and right sides of a seating portion and straddles a side frame of a side support device, and a back and back portion which is integral with the side support and constitutes a back and back side of a seat. In the seat back, a side support device-equipped seat back is characterized in that a slit is provided in a longitudinal direction in a side surface portion forming a side surface of the seat in the side support portion. 2. The front side surface portion forming the front side surface of the seating portion and the side support portion, the rear side surface portion formed on the same rear side surface and the back back portion are formed separately and with different hardness, A method of manufacturing a seat back with a side support device, which is formed by using a cushion body formed by integrally adhering a portion excluding the slit forming portion.