JP3664430B2 - Seat backrest - Google Patents

Description

[0001]
[Field of the Invention]
The present invention relates to a backrest (backrest) of a seat installed in various vehicles such as automobiles, trains, ships, airplanes, movie theaters, and the like, and more particularly to a backrest of a seat having a recess on the back surface.
[0002]
[Prior art]
In general, as shown in FIG. 3, a seat installed in a vehicle is composed of a cushion 10 and a backrest 20 that is tiltably connected to the rear end of the cushion 10. Is installed.
[0003]
As shown in FIG. 2, the backrest 20 includes a back frame 30 serving as a framework thereof, a cushion pad 50 arranged to wrap around the back frame 30 from the front side to the back side of the backrest 20, and the backrest 20. In order to secure a large space between the seats 40 and the other seats installed behind the seats, a recess 21 is provided at substantially the center of the back surface of the backrest 20.
[0004]
The recess 21 is formed by leaving no cushion pad material on the back surface, leaving the back peripheral portion 51 of the cushion pad 50.
[0005]
The covering material 40 includes a front covering material 41 that covers the front side of the cushion pad 50, a first back covering material 42 that covers the back peripheral portion 51 of the cushion pad 50, and a first covering material that covers the recess 21 of the backrest 20. It is composed of two back covering skin materials 43, which are sewn together. A hog ring 44 is fixed to a stitched portion between the first back cover skin material 42 and the second back cover skin material 43, and is hung on the attachment portion 31 provided with the back frame 30 to be stopped. The first back cover skin material 42 can be placed along the back periphery of the cushion pad.
[0006]
[Problem to be Solved by the Invention]
However, the use of a hog ring increases the number of parts, and an additional step of hanging the hog ring on the attachment portion 31 is required. In particular, in this process, the hog ring is inside the skin material, it is difficult to automate, and must be done manually.
[0007]
If the position of the hog ring does not match the position of the mounting portion, excessive tension is applied to the first back cover skin material, or sag occurs.
[0008]
The present invention has been made to solve the above-mentioned problems, and provides a seat backrest that reduces the number of parts that are different from the skin material and does not require an additional process in manufacturing. With the goal.
[0009]
Another object of the present invention is to provide a seat backrest that can use the conventional manufacturing process as it is.
[0010]
[Means for Solving the Problems]
The backrest of the present invention that solves the above problems is a seat backrest comprising a back frame as a framework, a cushion pad disposed on the front side of the back frame, and a covering material covering the whole. The covering material is connected between the front covering skin material covering the front side of the cushion pad, the back covering skin material covering the back side of the backrest, and both skin materials, and is positioned around the backrest of the backrest. And a surrounding covering portion. The surrounding covering portion includes a hardly stretchable sheet material, a cushion portion located on the hardly stretchable sheet, and a skin material portion covering the cushion portion.
[0011]
The non-extensible sheet material is preferably made of polyvinyl chloride. The perimeter of the cushion material may extend beyond the back frame and under the perimeter covering.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, the backrest 60 of the present invention includes a back frame 61 as a framework of the backrest, a cushion pad 62 positioned so as to wrap around the end of the back frame from the front side to the back side of the backrest, and It is comprised from the coating | covering material 63 used as the skin of a backrest.
[0013]
The back frame 61 is composed of a rigid pipe material bent in a substantially inverted U shape and a plurality of spring bands (not shown) laid horizontally on the pipe material.
[0014]
The cushion pad 62 is obtained by foaming a foamable material such as polyurethane into a predetermined shape that matches the contour shape of the backrest. Here, the peripheral portion of the cushion pad 62 wraps around the back frame 61 to form a rear peripheral portion 62 '. The rear peripheral portion 62' is more than the conventional rear peripheral portion 51 (FIG. 2). The thickness is thin.
[0015]
The covering material 63 includes a front covering skin material 64 that covers the front side of the cushion material, a surrounding covering portion 66 that covers the back peripheral portion 62 ', and a back covering skin material 65 that covers the back side of the backrest.
[0016]
The surrounding covering portion 66 includes a sheet material 67, a cushion portion 68 positioned thereon, and a skin material portion 69 covering the cushion portion 68.
[0017]
As the sheet material 67, a sheet material having a high tensile strength and not easily stretched (this is referred to as an inextensible sheet material) is used. Polyvinyl chloride is preferably used as the material for the inextensible sheet material.
[0018]
The skin material portion 69 is made of a skin material used for a normal seat.
[0019]
The cushion portion 68 is made of foam, for example, slab urethane, and has a shape that can form a concave portion on the back surface of the backrest. The cushion portion 68 may be attached to either or both of the sheet material 67 and the skin material 69.
[0020]
The surrounding covering portion 66 configured as described above is sewn and connected to the front covering skin material 64 and the back covering skin material 65.
[0021]
The backrest according to the present invention is formed by attaching a cushioning material to a back frame according to a conventional method for manufacturing a backrest, covering the backrest with an integrated covering material, and pulling the back covering skin material downward. It is manufactured by fixing. When the back covering skin material is pulled, the force acts on the sheet material 67 of the surrounding covering portion 66 and does not substantially act on the skin material portion 69. Accordingly, the shape of the cushion portion 68 is maintained. On the other hand, the sheet material 67 on which the force acts is hardly stretched as described above, and thus does not substantially extend. Therefore, the front covering material portion 64 and the back covering skin material 65 can maintain the necessary tension. .
[0022]
In this embodiment, the back peripheral portion 62 'of the cushion pad 62 and the cushion portion 68 of the peripheral covering portion 66 form the back peripheral shape of the seat, but when the cushion portion 68 has the necessary back peripheral shape, , The back peripheral portion 62 ′ of the cushion pad 62 is not necessary.
[0023]
【The invention's effect】
The backrest of the present invention eliminates the need for a hog ring and a process of attaching the hog ring to the attachment part, so that not only can the manufacturing cost be reduced, but also the problems caused by the mismatch of the position of the hog ring and the attachment part are Not at all.
[0024]
Also, in order to give the covering material the necessary tension, even if the back cover skin material is pulled, the pulling force does not substantially act on the skin material portion that covers the cushion portion. Since the desired shape is maintained, the appearance of the backrest can be maintained as expected.
[0025]
Furthermore, when the covering material is prepared according to the present invention, the pack rest of the present invention can be manufactured according to a conventional backrest manufacturing method (however, a hog ring fastening step is unnecessary).
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an upper portion of a backrest according to the present invention.
FIG. 2 is a cross-sectional view of an upper part of a conventional backrest.
FIG. 3 is a side view of a seat generally installed in a vehicle.
[Explanation of symbols]
10 ... Cushion
20 ... Backrest
21 ... Recess
30 ... Back frame
31 ... Mounting part
40 ・ ・ ・ Coating material
41 ・ ・ ・ Front cover material
42 ... first back cover skin material
43 ... Second back cover material
50 ・ ・ ・ Cushion pad
51 ・ ・ ・ Back side area
60 ... Backrest of the present invention
61 ... Pack frame
62 ... Cushion pad
62 '・ ・ ・ Rear area
63 ... Coating material
64 ・ ・ ・ Front cover material
65 ・ ・ ・ Back cover material
66 ... Surrounding coating
67 ・ ・ ・ Non-extensible sheet material
68 ・ ・ ・ Cushion part
69 ・ ・ ・ Skin

Claims (3)

A seat backrest comprising a back frame as a framework, a cushion pad disposed on the front side of the back frame, and a covering material covering the whole;
The covering material is connected between the front covering skin material covering the front side of the cushion pad, the back covering skin material covering the back side of the backrest, and the both skin materials, and the back surface of the backrest. A surrounding covering portion located around,
A backrest of a seat, wherein the surrounding covering portion includes a hardly stretchable sheet material, a cushion portion located on the hardly stretchable sheet, and a skin material portion covering the cushion portion. The backrest according to claim 1, wherein the non-extensible sheet material is made of polyvinyl chloride. The backrest according to claim 1, wherein the periphery of the cushion pad extends beyond the back frame and under the peripheral covering portion.

Images