JPS6233694A - Manufacture of cover block for cover body or case or the like - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for manufacturing a cover for a file or binder, or a cover for a case such as a cassette storage case.
Especially regarding the method of fixing the edges. .

(Prior art) The conventional general manufacturing method for file covers, for example, is the second method.
As shown in the figure, first, (a) the core plate (1) and the inner sheet (2) are overlapped, and a folding margin (3a) of the required width is taken at the side edge of the outer sheet (3). Along the inside!
Another method of applying (4) is applying double-sided adhesive tape. ), then (;, (b) Attach the lower surface of the core plate (1) to the outer sheet (3) at the adhesive (4) application area C: and attach it (: the folding margin of the outer sheet (3) ( 3a) Upper tEi
ft knee 8 (4)' wo wit,, further t= (c) glue (
4) Folding allowance (3a) for outer sheet (3)
Fold it over and polymerize it to the top side of the inner sheet (2),
Finally, (a) along the overlapping part of the folding allowance [3a]! IM
Oxygen was supplied through a process such as ((5) in the figure indicates the suture line).

(Problems to be Solved by the Invention) In the conventional manufacturing method described above, the gluing operation 1 is first performed; therefore, the inner sheet (2) and the outer sheet (3) are fixed, resulting in poor work efficiency; To ensure that the side edges of the core plate (1) do not loosen 1; in order to secure the core plate (1) tightly, it is necessary to be very careful in folding and crimping the folding margin (3a) with the folding margin (3a) strongly pulled. (Particularly when inserting an elastic body such as a sponge between the core plate (1) and the outer sheet (3) in order to obtain a soft touch, the work becomes even more difficult. ), and since the inner sheet (2) and the outer sheet (3) are glued together only tlA (4)'(; therefore, there are problems such as the need for sewing (a) for reinforcement. However, the present invention aims to solve these problems.

(Means for Solving the Problems) In order to solve the above problems (Second), the method for manufacturing clothing such as a cover body or a case of the present invention involves polymerizing a core plate and an elastic body on a thermoplastic synthetic resin sheet. A thermoplastic synthetic resin sheet is coated on top of it, and two synthetic resin sheets are welded at a position along the outer edge of the core plate using a high-frequency welder. The structure is characterized in that the weld is fused at the position, and then the folding margin of the required width formed on the outside of the welding point is folded back and pasted onto the lower surface of the lower thermoplastic synthetic resin sheet. .

(Embodiment) FIG. 1 is a cross-sectional diagram showing a manufacturing process of an embodiment of the present invention, and two embodiments ζ will be explained below.

First, (g) a soft chlorinated beer sheet (6), which is a thermoplastic synthetic resin, is laid at the bottom as an inner sheet, and on top of that, a hard paper (7) as a core plate is attached with double-sided adhesive tape 0. The parts are placed in a fixed state, and a sponge sheet (8) as an elastic body is sequentially polymerized, and then a soft vinyl chloride sheet (9), which is a thermoplastic synthetic resin, is again covered as an outer sheet. Next, (B) a high-frequency welder having an inner side (- a protrusion Cl0a with a flat tip) and a sharp protrusion Cl0b' whose tip is slightly lower than the above-mentioned protrusion (1θa) on the outer side separated by a required width. The upper electrode f
Apply the il so that the inner protrusion (70a) is along the outer edge of the hard paper (7) serving as the core plate, and then apply the upper and lower vinyl chloride sheets to the inner protrusion (IOa).
(9) (6) are welded together, and the upper and lower vinyl chloride sheets (9) and (6) are welded at a required width apart from the welding point I using the sharp outer protrusion (10b). ° Fusing at the same time as welding. (c) When the folding allowance α2 is defined from the welding point αυ to the fused side edge, the polyvinyl chloride sheet (6) is folded by the width of the folding allowance C13.
Bottom side ζ: Apply glue (13) (you can also stick double-sided adhesive tape on the side instead of glue).Finally, (D) folding distance α
Lower vinyl chloride sheet (6) with 2 as inner sheet
Fold it over and paste it on the bottom side of the screen (the second step is completed).

(Operations and Effects) The present invention has the above configuration, and in the conventional manufacturing method, the inner sheet (2) and the outer sheet (33
was fixed by gluing, whereas in the manufacturing method of the present invention, the thermoplastic synthetic resin sheet as the inner sheet and the thermoplastic synthetic resin sheet as the outer sheet are high-frequency welded, which is different from the conventional manufacturing method. This eliminates the need to apply glue, which was previously necessary, making the work easier and faster.In addition, the thermoplastic synthetic resin sheet serving as the inner sheet and the thermoplastic synthetic resin sheet serving as the outer sheet are made of high-frequency adhesive rather than glued. Since they are integrated by welding, their adhesion is much stronger, and there is no need for reinforcement by stitching or the like as in the past.

In addition, in order to tightly fix the side edges without loosening them, conventional manufacturing methods required skillful work such as gluing the folded edges while tightly pulling the folded margin (3a). According to the manufacturing method of the invention, the side edges are tightly fixed by high-frequency welding (C2), so the folding margin can be simply pasted, making the work easier. It also has the effect of improving the quality of the product.

[Brief explanation of drawings]

Figure 1 is a manufacturing process diagram with a cross-sectional view of an embodiment of the present invention;
The figure is a perspective view of the manufacturing process of a conventional example. (1) Core plate, (2) Inner sheet, (3)
...Outer sheet, (3a)...Folding allowance, +41 +4
)'...glue, (5)...-suture line, (6)...vinyl chloride sheet, (7)...hard paper, (8)...sponge sheet, (91...chloride Vinyl sheet, α1...
・Electrode, (10a)... Inner protrusion, (10b)...
・Outer sharp protrusion, αυ... welding point, (13...
- Folding allowance, alpha...glue, (14)...double-sided adhesive tape.

Claims (1)

[Claims] A core plate and an elastic body are polymerized on a thermoplastic synthetic resin sheet, a thermoplastic synthetic resin sheet is further coated on top of the core plate, and the two synthetic resin sheets are welded at a position along the outer edge of the core plate using a high-frequency welder. At the same time as the welding, the area outside the welded area is cut by a required distance, and then the folding margin of the required width formed on the outside of the welded area is folded back and pasted onto the lower surface of the lower thermoplastic synthetic resin sheet. 1. A method for manufacturing a front plate for a cover body or a case, etc.