JPH0716992A - Operating protective cover and manufacture thereof - Google Patents

Abstract

PURPOSE:To prevent aging deformation and to improve durability by laminating a cloth sheet to a rear surface of a thermoplastic resin sheet. CONSTITUTION:An operating protective sheet 1 is formed by laminating a thermoplastic resin sheet 2 at an outside to a cloth sheet 3 on a rear surface. The sheet 2 uses, for example, polyolefin resin such as polypropylene, polyethylene, ethylene, vinyl acetate, etc. A foamed sheet made of polyolefin resin and synthetic resin is also used. A method for manufacturing the sheet comprises the steps of extracting the air from an interior of a mold 4 from a bottom of the mold 4 having many air vent holes 5 on an outer surface by a pump 6 to be negative pressure, covering the mold 4 under negative pressure with a nonwoven fabric 3 cut in a predetermined shape, and bringing the sheet 2 heated to be softened by heat from above into pressure contact therewith. Thus, the sheet 2 is press-bonded to the fabric 3, and molded in a specific shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work protection cover for preventing damage to a body in an automobile assembly line and a method for manufacturing the work protection cover.

[0002]

2. Description of the Related Art In automobile assembly work, tools and parts sometimes come into contact with the body and scratch the painted surface. For this reason, a work protection cover 20 made of synthetic resin for preventing scratches as shown in FIG. 5 is used, and the fender 21, bumper 22 and door 2 of the automobile are assembled at the time of assembly work.
3, bonnet 24, side panel 25, side sill 2
6. The trunk lit 27 was covered and protected.
As shown in FIG. 6, the work protection cover 20 is formed on the inner peripheral surface of a thermoplastic PP (polypropylene) sheet 28 with P.
An E (polyethylene) foam sheet 29 is attached and configured. The conventional protective cover 20 for work is manufactured by previously forming the PE foam sheet 29 on the back surface of the PP sheet 28.
Was adhered to produce a sheet base material, and then the sheet base material was heated and pressed with a molding die to form a cover having a specific shape.

[0003]

However, the above-mentioned conventional work protection cover 20 is formed by laminating the PP sheet 28 and the PE foam sheet 29. Although the PP sheet 28 has a small shrinkage ratio, it is a PE foam sheet. No. 29 has a large shrinkage rate. Therefore, there is a problem that the work protection cover 20 is deformed with time due to a difference in shrinkage ratio between the two sheets 28 and 29, is curled, cannot be used, and is poor in workability. In addition, the PE foam sheet 29 is easily damaged and has poor durability.

The present invention solves the above-mentioned conventional problems, and provides a work protection cover which does not deform with time as described above and has excellent durability, and a method for manufacturing the same. The purpose is.

[0005]

The work protection cover of the present invention is constructed by laminating a cloth sheet on the back surface of a thermoplastic resin sheet.

The manufacturing method of the work protection cover of the present invention is as follows.
A fabric sheet is placed in a molding die that has an air vent hole and a negative pressure is applied, and a thermoplastic resin sheet that has been heat-softened is pressed against this fabric sheet and the fabric sheet is attached to the back surface of the thermoplastic resin sheet. At the same time, it is molded into a specific shape.

In the work protection cover of the present invention, a stain prevention sheet having a large number of holes formed on the entire surface is attached to the back surface of the cloth sheet. In the method for manufacturing a work protective cover of the present invention, an air vent hole is formed, and a stain-preventing sheet having a large number of holes formed on the entire surface thereof is arranged in a molding die to which negative pressure is applied. The sheet for use is covered with a cloth sheet, and the softened thermoplastic resin sheet is pressed against the cloth sheet, and the thermoplastic resin sheet, the cloth sheet and the antifouling sheet are bonded together and molded into a specific shape.

[0008]

The working protective cover having the above-described structure eliminates the difference in shrinkage ratio between the thermoplastic resin sheet and the cloth sheet,
The work protection cover does not curl due to deformation over time.

Further, according to the above-mentioned manufacturing method, the thermoplastic resin sheet and the cloth sheet are pressed and molded at the same time, so that the protective cover can be prevented from being deformed with time and the working process can be simplified.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view and a partially enlarged view of a work protection cover according to a first embodiment of the present invention. This work protection cover 1 has a thermoplastic resin sheet 2 on the outer side, and is constructed by laminating a cloth sheet 3 on the back surface. As the thermoplastic resin sheet 2, a polyolefin resin, for example, a sheet of PP (polypropylene), PE (polyethylene), EVA (ethylene vinyl acetate), or the like, or TPE (thermoplastic elastomer) is used.
And so on. Further, the thermoplastic resin sheet 2 may be a foamed sheet made of polyolefin resin and synthetic rubber. PE is used as the polyolefin resin, and EPDM (ethylene-propylene-dien) is used as the synthetic rubber.
omethylene rubber) is used. A material having a foaming ratio of about 10 times is suitable for the foamed sheet, but needless to say, it is not limited to about 10 times.

The cloth sheet 3 on the back surface uses a non-woven fabric, but the cloth sheet 3 is not limited to the non-woven fabric. Next, a procedure for manufacturing the work protection cover will be described.

FIG. 2 shows an outline of a method of manufacturing the protective cover 1. Reference numeral 4 denotes a molding die, which has a large number of air vent holes 5 formed on its outer surface, and a pump 6 is used to form the die 4 from the bottom. A negative pressure is applied by bleeding air from inside.

The negative pressure-applied mold 4 is covered with a non-woven fabric 3 cut into a certain shape, and the thermoplastic resin sheet 2 cut into a certain shape from above and softened by heat.
Pressure contact. As described above, the thermoplastic resin sheet 2 and the non-woven fabric 3 are pressure-bonded to each other, and at the same time, the thermoplastic resin sheet 2 and the non-woven fabric 3 are molded into a specific shape. Can be planned.

Unnecessary portions of the sheet manufactured as described above are cut, and although not shown, a non-slip tape for slip prevention is attached to the inner peripheral surface of the work protection cover 1 to prevent slipping. The work is completed by attaching a locking tool for locking the work protection cover 1 to the vehicle body.

The work protection cover 1 has the cloth sheet 3 attached to the inside thereof, so that it does not curl due to deformation over time, and is superior in durability to conventional PE foams.

Next, a second embodiment of the work protection cover will be described. FIG. 3 is a cross-sectional view of the work protection cover of the second embodiment and a partially enlarged view thereof. The work protection cover 10 of the second embodiment includes a thermoplastic resin sheet 11, a cloth sheet 12, and a stain prevention sheet 13 from the outside.
It is composed of three layers. In the second embodiment, the thermoplastic resin sheet 11 and the cloth sheet 12 are the same as those in the first embodiment, and therefore the details are omitted.

The second embodiment is different from the first embodiment in that a stain preventing sheet 13 having a large number of small holes 14 formed on the entire surface is attached to the third layer.
The sheet 13 is a thin PE sheet and prevents the cloth sheet 12 from being soiled.

FIG. 4 shows the manufacturing method, and the molding die 15 is the same as that used in the first embodiment. A negative pressure is applied to the mold 15 by a pump 16, and a stain prevention sheet 13 is put on the negative pressure. Even if the mold 15 is covered with the antifouling sheet 13, a large number of small holes 14 are formed on the entire surface of the sheet, so that the air vent hole 17 is not completely closed and air can be drawn. Fabric sheet 1 from above
The work protective cover 10 can be obtained by covering with 2 and then with a thermoplastic resin sheet 11 which is heated and softened by heat and press-contacted and molded.

The pressure bonding and molding in the first and second embodiments may be carried out by pressing in the direction opposite to that shown in FIGS. As shown in FIG. 6, the protective covers 1 and 10 of the embodiment manufactured as described above have fenders,
It covers bumpers, doors, bonnets, side panels, side sills, trunk lits, etc. to protect the car body during work.

[0020]

The work protection cover of the present invention, having the above-mentioned structure, does not deform over time and is excellent in durability.

According to the above manufacturing method, the thermoplastic synthetic resin sheet and the cloth sheet are pressed at the same time and molded,
Preventing deformation over time due to the difference in shrinkage of this sheet,
The work process can be simplified.

[Brief description of drawings]

FIG. 1 is a sectional view and a partial sectional view of a work protection cover according to a first embodiment of the present invention.

FIG. 2 is a schematic view of a method for manufacturing the work protection cover of the first embodiment.

FIG. 3 is a sectional view and a partial sectional view of a work protection cover according to a second embodiment of the present invention.

FIG. 4 is a schematic view of a method for manufacturing the work protection cover of the second embodiment.

FIG. 5 is a perspective view of a working protective cover in use.

FIG. 6 is a partial cross-sectional view of a conventional work protection cover.

[Explanation of symbols]

 1 Work protection cover 2 Thermoplastic resin sheet 3 Cloth sheet 4 Type 5 Air vent hole 10 Work protection cover 11 Thermoplastic resin sheet 12 Cloth sheet 13 Stain prevention sheet 14 Hole 15 type 17 Air vent hole

Claims (4)

[Claims] 1. A work protection cover for preventing damage to a body during assembly of an automobile, wherein the protection cover is constructed by laminating a cloth sheet on the back surface of a thermoplastic resin sheet. . 2. A fabric sheet is placed in a molding die in which an air vent hole is formed and a negative pressure is applied, and a thermoplastic resin sheet which has been softened by heating is pressure-contacted to the back surface of the thermoplastic resin sheet. A method for manufacturing a work protection cover, which comprises laminating cloth sheets together and molding them into a specific shape. 3. A work protection cover comprising a cloth sheet according to claim 1 and a soiling prevention sheet having a large number of holes formed on the entire surface of the cloth sheet. 4. A stain-preventing sheet having a large number of holes formed on the entire surface thereof is arranged in a molding die having an air vent hole and a negative pressure applied, and the stain-preventing sheet is covered with a cloth sheet. , A thermoplastic resin sheet that has been heat-softened to this cloth sheet is pressed, and the thermoplastic resin sheet, the cloth sheet, and the stain prevention sheet are bonded together, and a protective cover for work characterized by being molded into a specific shape. Production method.