JPS6221552B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel method for manufacturing a weft seat, etc., and an embodiment thereof will be described with reference to the drawings. Inside is a conductive frame 2 whose lower edge is always in contact with the lower electrode A of the welder, and inside the conductive frame 2 is a wooden insulating stand 4 equipped with a number of cushion springs 3 on the lower surface, and further on the upper surface of the insulating stand 4. An auxiliary device 6 is constructed in which plate-shaped movable electrodes 5 made of conductive metal are provided, each of which is in constant contact with the inner circumferential surface of the conductive frame 2.

Next, the auxiliary device 6 is placed on the lower electrode I, and an outer covering sheet 7 made of a thermoplastic synthetic resin sheet is placed on the upper surface of the moving electrode I, and a sponge core is placed on the upper side of the outer covering sheet 7. A hardboard core member 9 on which a thermoplastic synthetic resin heat-sensitive adhesive 10 has been applied in advance to the upper surface of the peripheral edge 9 is further superposed on the sponge core material 8, and then the entire periphery of the outer cover sheet 7 is bonded. a pressing plate which is turned over upward so that the same part overlaps the upper surface of the outer peripheral edge 9' of the core member 9, and which has a frame shape on the upper surface of the core member 9 and is horizontally arranged inside the pressing plate; The upper electrode 12 is pressed down by the elastic force of the spring 13, and the press plate 12 presses out excess air between the core member 9 and the outer cover sheet 7. The lower surface of the upper electrode is pressed against the upper surface of the turned part 7' of the outer covering sheet 7, and in this pressed state, a high frequency voltage is applied to the upper and lower electrodes A and B to attach the turned part 7' to the core member 9. The adhesive 10 is welded to the area where the adhesive 10 is applied.

After that, fittings (not shown) for attaching to the chair frame were attached to predetermined locations on the outer surface of the hardboard core member 9 (the front may also be attached in some cases) to obtain a finished product. It is something.

As described above, the present invention not only has the remarkable effect of efficiently constructing a chair seat, etc. through an extremely simple manufacturing process, but also provides a low-cost seat, etc. In addition, in the present invention, a pressing plate that is pressed down by the elastic force of a spring is disposed inside the upper electrode, and the outer cover sheet is not turned over by the upper electrode. When welding the core member and the core member together, this press plate is used to press out the excess air between the core member and the outer cover sheet, so the spring force that makes this press plate elastic is adjusted as appropriate. This has the effect of increasing or decreasing the amount of air remaining between the core member and the outer covering sheet, and making it possible to arbitrarily adjust the strength of the cushion of the finished product, such as the seat of a chair.

[Brief explanation of the drawing]

The figures show an embodiment of the method for manufacturing a chair seat, etc. of the present invention, in which Figure 1 is an exploded perspective view of an auxiliary device, Figures 2 and 3 are sectional views showing the manufacturing process, and Figure 4 is a cross-sectional view showing the manufacturing process. The figure is a rear perspective view of the finished product. A... Lower electrode, 1... Insulating frame, 2... Conductive frame, 3... Spring, 4... Insulating stand, 5... Moving electrode, 6... Auxiliary device, 7... Outer cover sheet, 7' …
...Turning part, 8... Sponge core material, 9... Core member,
9'...Periphery of core member, 10...Adhesive, roller...
...Top electrode.

Claims (1)

[Claims] 1. A conductive frame whose lower edge is always in contact with the lower electrode is placed within an insulating frame of a predetermined height, an insulating stand with a cushion spring on the bottom surface is placed within the same conductive frame, and the above-mentioned conductive frame is always placed on the top of the insulating stand. An auxiliary device provided with movable electrodes in contact with the inner circumferential surface of the electrode is placed on the lower electrode, and an outer covering sheet made of thermoplastic synthetic resin such as a synthetic resin sheet, leather, or cloth is placed on the upper surface of the movable electrode. A cushion material such as sponge is placed on the upper side of the same outer cover sheet, and a hard core material such as hard board or plywood is coated with a thermoplastic synthetic resin heat-sensitive adhesive on the upper surface of the periphery in advance on the upper side of the cushion material. After polymerizing each of the outer sheet, the peripheral edge of the outer cover sheet is turned upward to overlap the outer peripheral edge of the core member, and at the same time, the outer sheet has a frame shape on the upper surface of the core member, and a horizontal The upper electrode is pressed down by the elastic force of the spring, and the press plate presses out excess air between the core member and the outer cover sheet. The lower surface of the upper electrode is pressed against the upper surface of the turned part of the outer cover sheet, and in this pressed state, a high frequency voltage is applied to the upper and lower electrodes to melt the turned part to the adhesive-coated surface of the core member. A method of manufacturing a seat of a chair, etc., which is characterized by being worn.