KR100296377B1 - Pad for shoulder strap or backsack - Google Patents

Abstract

PURPOSE: Provided is a pad for back and strap of knapsack which has improved cushion effects but has a light weight, therefore they can improve wearing feeling upon using by pumping action of vents provided in the pad. CONSTITUTION: The pad is produced by piercing a foam sheet(2) at a pressing platform using a punching machine to form vents(1). The foam sheet can be made from EVA resin and polyurethane and pierced by instant pressurizing. Concretely, the foam sheet is inserted into a frame while the pressing platform is lowered, so as to prevent the foam sheet from being expanded by instant pressurizing. Also, it is possible to forming the foam sheet in a foaming frame during the foaming process. The pierced sheet may provide not only cushion effects but also excellent ventilation.

Description

Pad of shoulder back or suspenders {Pad for shoulder strap or backsack}

The present invention relates to a pad used for a backrest or shoulder suspenders used in a backpack, and a method of manufacturing the same, and to increase cushioning power by punching holes at a predetermined interval in a pad made of a foamed and flexible material. It is possible to provide a cool air through the air pumped through the case when the backpack is carried due to the perforated holes.

The pads used in the backrest and suspenders of backpacks currently used are usually used as polyurethane or polyethylene foams, usually called sponges, and soft foams are used among these polyurethane foams.

However, the advantage of such a flexible foam foam, that is, the sponge has a drawback of absorbing moisture quickly while having excellent breathability, which exposes a lot of problems for use in the backpack exposed to the outside, and because the foam urethane is excellent in thermal insulation It is a lot of sweat in the summer.

Therefore, recently, EVA resin, ethylene vinyl acetate copolymer, which is a modified polymer by copolymerization of vinyl acetate, has been used as a foam by using a characteristic that has flexibility and rubber elasticity, such as soft PVC, but the disadvantage of this is that It also has the disadvantage of poor breathability.

In addition, since it is usually used as suspenders or backrests to absorb moisture, the waterproof cloth or nylon is used to prevent the moisture absorbed in the backrest or suspenders from being absorbed when the pack is carried by the moisture absorption power. Therefore, there is a problem that the ventilation is not achieved at all.

The present invention has been made in order to solve the above-described problems, the pad is made of a polyurethane or EVA resin by inserting a foam sheet into the mold and fixed by a hole punched by a punching machine to fire the pad excellent in low weight and breathability Will be provided.

Figure 1 is a plan view showing one embodiment of a perforated hole in the foam sheet of the present invention.

2 is a longitudinal sectional view of the present invention;

Figure 3 is a schematic diagram showing an example of the punching method of the present invention.

4 is a perspective view showing an example of a use state of the present invention.

Explanation of symbols on the main parts of the drawing

DESCRIPTION OF SYMBOLS 1: Hole 2: Foam sheet 3: Frame 4: Pressing table 5: Drilling machine

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, in one embodiment of the present invention, a hole 1 is formed by instantaneous pressurization using a press on a flexible foam foamed with polyurethane and a foam sheet 2 foamed with EVA resin. will be.

At this time, one embodiment for punching while pressing the press is pressurized in the state in which the soft foam or foam sheet (2) is inserted into the mold (3) in order to prevent the expansion of the foam or foam sheet (2) at the time of pressing In the state in which the base 4 descends only by the volume of the soft foam or the foam sheet 2, the perforator 5 emerges from the center of the presser 4, so that the hole 1 is drilled.

In addition, it is possible to mold in a state in which the hole 1 is perforated directly in the foam mold during foam molding.

Therefore, the perforated pad in this way will be light weight as well as excellent breathability when forming the suspenders 10 or the backrest 20 in the hole 1 is punched.

In addition, when using the perforated pad 1 as the suspenders 10 or the backrest 20, the use of the mesh fabric or the case of being used to be primarily wrapped in the mesh fabric provides better air circulation. It will be able to exercise.

In addition, since the hole (1) generates a soft massage effect even when repeated friction is applied to the shoulder by the suspenders 10, the shoulder or the backrest is peeled off by repeated friction when traveling with a backpack for a long time as in the prior art. You can prevent losing.

As described above, the present invention is to improve the massage effect and breathability by friction due to the perforated hole to provide a low-weight backpack.

Claims (2)

(Correction) Pressing pad (4) while the foam sheet (2) to be cleaned is inserted into the frame (3) so as not to move to block the frame (3) in which the foam sheet (2) is inserted Perforator (5) is launched from the center of the pad of the backrest or suspenders, characterized in that the hole (1) is punctured at regular intervals to the pad of the cushioning material used for the suspenders or the backrest. (Newly formed) When the foam sheet 2 to be drilled is inserted into the frame 3 so that the foam sheet 2 does not move, the pressing table 4 blocks the frame 3 into which the foam sheet 2 is inserted. Method of manufacturing a back of the backpack or pad of suspenders, characterized in that the perforator (5) is fired in the center of the punching hole (1).