JPS59202826A - Manufacture of seat - Google Patents

Abstract

PURPOSE:To reduce man-hour in operation while molding integrally the portion receiving a head rest stay by a method in which a seat pad is foamed and molded integrally together with a cylindrical body having a bottom and a seat frame, and said cylindrical body is made of synthetic resin and fixed to the seat frame. CONSTITUTION:The synthetic resin-cylindrical body 5 with a bottom capable of containing a head rest stay 4 is fixed to a seat frame 1, and the opening mouth 5A side of the cylindrical body 5 is arranged so as to be closely in contact with the inner wall surface 2C of a mold 2. A seat pad 3 is foamed and molded in the mold 2 integrally together with the seat frame 1 and the cylindrical body 5. Thus, if they are integrally foamed and molded, because the cylindrical body 5 is made of synthetic resin, it is caused to be closely in contact with the seat pad 3 which is equally a foamed body made of synthetic resin, and both bodies become one body surely. After the molding of the seat pad 3 has been finished, the seat pad 3 is taken out from the mold 2. Seat skin 6 is fixed onto the pad 3, and a color 7 is inserted and fitted into the opening mouth 5A, and thus the cylindrical body 5 is completed as the head rest support.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a seat for a vehicle, etc., and particularly relates to an improvement in a method of manufacturing a seat C in which a frame and a foam pad are integrally molded.

In recent years, the frame and the butt made of synthetic resin foam are integrally molded for seats for vehicles, especially automatic vehicles, in order to meet the demands for improved appearance quality, improved productivity, reduced stress, and reduced weight. A method has been proposed.

1. For example, parts such as headrest stays and reclining fittings are installed (pushed) into the foam pad. It was a solidification process to form an elongated cavity for inserting a headrest stay etc. using a mold.

Therefore, in the past, it was necessary to process and form the elongated hollow part after the foam pad was formed, which required extra processing, and the finished state was not always satisfactory. was there.

On the other hand, it is also possible to mold the long hollow part of the foam pad using a slider, etc.
In addition to the high cost of the mold, there is a problem in that the foaming synthetic & I fat agent tends to get into the sliding portion of the slide horn, making the sliding portion unable to slide or causing damage.

On the other hand, a core corresponding to the required elongated cavity in the sheet is fixed to a frame, the core and frame are set in a mold, and a foamed synthetic resin is placed in the mold. is injected and foamed to form a foam pad integral with the core and frame, and after the molding is completed, the core is removed and the elongated cavity inside the foam pad formed by the core is filled with: A possible method is to form a slender hollow portion without post-processing by attaching the corresponding elongated fA'rA to the frame by 1Φ and attaching it to the frame.

However, this method of manufacturing a sheet that covers the core requires work to attach and detach the core to the seat frame each time the mold is used for each molding process, and it is also necessary to remove the core from the foam. For easy molding, treatment with a mold release agent is required, which poses a problem in that it requires a large number of man-hours.

Furthermore, there is a problem in that the core and the mold release agent themselves increase manufacturing costs.

In addition, for the production of the above sheet 'h>h, the core is extracted and 1=
For example, a headrest support for supporting a hendrest chair can be installed in the rear elongated cavity.
Since the rad support stay slides in the axial direction relative to the headrest support, if the headrest support is not firmly supported, the headrest support will become loosely fastened to the seat frame, causing so-called rattling. There is a problem that it occurs easily.

This invention was made in view of the above problems, and
Reduces work hours without using cores, and
An object of the present invention is to provide a method for manufacturing a sheet in which a radrest support is provided between three rows.

This invention relates to a method for producing a seat, in which a seat frame is set in a mold, and a foamed synthetic resin agent is injected into the mold and foamed to form a foam seat pad integral with the seat frame. (A bottomed cylindrical body made of synthetic resin that can accommodate the headrest day is attached to the seat frame, and the opening side of the outer body is
By placing the seat pad in close contact with the inner wall surface of the mold and covering the seat pad integral with the seat frame and the cylindrical body with foam molding, the headrest stay storage section can be integrated into the seat pad during foam molding of the seat pad. The above objective is achieved by forming the following.

In addition, the present invention uses a bottomed cylindrical body made of commercially available synthetic resin as a headrest support that supports the rad stay so that it can slide in the axial direction, so that the synthetic resin bottomed cylindrical body When molding the seat pad with foam,
In this way, the above objectives are achieved.

Further, the present invention includes a flange-like member integrally provided at the outer end of the cylindrical body and extending along the inner wall surface of the mold, thereby making the sealing of the cylindrical body more reliable. At the same time, the above object is achieved by increasing the strength of the headrest stay insertion side end.

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

In this embodiment, as shown in FIG. 1, a seamet frame 1 is set in a mold 2, and a foamed synthetic resin IJj agent is injected into the mold 2 to foam it. Seat frame 1
A bottomed cylindrical body 5 made of synthetic resin capable of housing the headrest stay 4 is attached to the cylindrical body 5, and the opening IOA side of the cylindrical body 5 is brought into close contact with the inner wall surface 2C of the mold 2 &! Place,
The seat pad 3, which is integral with the seat frame 1 and the cylindrical body 5, is foam-molded in the mold 2.

In the figure, numeral 2A indicates the upper die of the mold 2, and 2B indicates the lower die.

When the seat pad 3 is integrally foam-molded with the linear body 5 and the seat frame 1 as described above, since the cylindrical body 5 is made of synthetic resin, it is also made of synthetic resin (for example, urethane) foam. It adheres well to the seat pad 3, and the two parts are surely integrated.

Further, the cylindrical body 5 has a bottom, and the opening 5A thereof is in close contact with the inner wall surface 2c of the mold 2, so that the seat pad 3
When covering with foam molding, the foamed synthetic resin agent does not enter into the cylindrical body.

After the molding of the seat pad 3 is completed, the seat pad 3 is removed from the mold 2, and the seat skin 6 is attached as shown in FIG. 2, and the collar 7 is inserted and fitted into the opening 5A. Use the linear body 5 as a headrest support to complete C.

According to the method of the embodiment, the cylindrical body as a rad support is formed during foam molding of the seat pad 3 without using a core and without requiring installation work in a later process. 5 can be integrally attached to the same cut.

In addition, in this embodiment, the cylindrical body 5 is firmly connected to the seat frame 1 in advance, and is also connected to the seat pad 3 which tightly covers the front button of the cylindrical body 5. Since it is firmly supported integrally with the seat frame 1, the cylindrical body will not loosen or slide.

Next, a second embodiment of the present invention shown in FIG. 3 will be explained.
4 Ru.

In this second actual flow example, the mold 2 is attached to the outer end of the linear body.
A flanged member 8 is integrally provided along the inner wall 2C and extends.

In the case of this embodiment, since the area of the IT portion of the outer end of the cylindrical body relative to the inner wall surface 2C of the mold 2 through the brim portion (28) is increased, during foam molding of the seat pad 3, The seal becomes more reliable, and therefore, the intrusion of the foamed synthetic resin agent into the cylindrical body 5 is further reliably prevented.

In addition, the brim member 8 extends along the surface of the seat pad 3 after completion of molding, so it not only reinforces the connecting portion between the seat pad 3 and the cylindrical body 5 but also strengthens the cylindrical body 5 itself. The advantage is that the rigidity can be increased.

d3 In the above actual IJm example, the cylindrical body 5 itself is formed integrally with the seat pad 3 and constitutes a headrest support for the rad support stay 4, but the present invention is limited to this. The cylindrical body may be made of synthetic resin and can accommodate the headrest stay directly or indirectly.

Therefore, for example, a metal headrest support may be attached to the inside of the linear body 5.

Further, although the above embodiments relate to the manufacturing method of the seats 1 to 1 of a vehicle, the present invention is also applicable to seats for aircraft, ships, etc.

Since the present invention is configured as described above, it is possible to integrally form the headrest stay storage portion with the seat frame and the seat pad in a process of using a core. We are proud to be able to simplify the manufacturing process, reduce labor costs, and improve quality.
It has an effect.

[Brief explanation of drawings]

FIGS. 1 and 2 are cross-sectional views showing the process of manufacturing a C sheet by the method of manufacturing a sheet according to the second embodiment of the present invention, and FIG. A sectional view showing the process (1) Sea 1 helm, 2... Molding mold, 2C... Inner wall surface, 3... Seat band, 4... Headrest stay, 5. ... Cylindrical body, 5A... Opening, 8... Flange-shaped member. Agent: Kei Matsuyama Can (1 idiot)

Claims (3)

[Claims] (1) Set the seat frame in a mold, and inject a foaming synthetic resin agent into the mold to foam it,
In the method for manufacturing a seat in which a foam seat pad is molded integrally with the seat frame, 1. A bottomed intermediate body made of synthetic resin capable of housing a headrest stay is attached to the seat frame, and the cylindrical body is A method for manufacturing a seat, characterized in that the opening side is placed in close contact with the inner wall surface of the mold, and the seat pad integrated with the seat frame and the cylindrical body is subjected to optical foam molding in the mold. . (2) The method for manufacturing a seat according to claim 1, characterized in that the bottomed cylindrical body made of synthetic resin is used as a headrest support that supports the headrest stay so as to be slidable in the axial direction. (3) The cylindrical body is characterized in that a flange-like member extending along the inner wall surface of the mold is integrally provided at the outer end of the cylindrical body. A method for manufacturing aha geki sheets.