JPH0659621U - Sucker - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a low-cost suction cup that can obtain different suction forces even with the same shape. [Structure] An adhesion portion 2 having a suction portion 3 formed in a concave shape with respect to a surface to be attached and including a peripheral portion 5 of the concave portion.
In the suction cup 1 which presses the inner surface against the surface and further presses the inner surface against the surface to lower the pressure in the concave surface to adsorb the adhering portion 2 with the adsorbing portion 3 connected to the adhering portion 2 by a soft synthetic resin material. It was molded integrally with a hard synthetic resin material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a suction cup that is attached to a smooth surface by suction, and more particularly to a suction cup that uses two types of synthetic resins, soft and hard, to improve the suction force.

[0002]

[Prior art]

 The suction cup is made of a flexible rubber or synthetic resin material and has a conical shape with a relatively gentle slope, that is, an umbrella shape so as to form a space inside, and its opening side is pressed against the fixed surface. By discharging the air inside the umbrella-shaped portion, the pressure inside the umbrella-shaped portion is reduced, and the pressure is adsorbed to the target surface by the atmospheric pressure. Therefore, it is necessary to prevent the air from entering the umbrella-shaped portion by closely contacting the fixed surface with the peripheral surface, and the central portion is made to act with a strong force to return to the low internal pressure. It is necessary to hold the inside. That is, the peripheral portion is required to be highly flexible and have a high friction coefficient so that the peripheral surface is in close contact with the fixed surface and does not slide down. On the other hand, such a suction cup was made of a flexible rubber in the old days, but recently, it is integrally formed of a single synthetic resin material having flexibility in terms of durability and the like.

By the way, when the suction cup is formed by integrally molding a single material, it is necessary to provide the material with two contradictory characteristics, that is, the softness for obtaining the adhesiveness and the hardness for obtaining the suction force. However, there is virtually no material that sufficiently satisfies these characteristics. Therefore, polyvinyl chloride (hereinafter referred to as PVC) has flexibility when thinned, has a high coefficient of friction, and easily adheres to a smooth surface, and also has strength if it has a certain thickness. Soft synthetic resin materials such as are widely used, and the peripheral part is made thinner to make it softer to ensure adhesion to the fixed surface, while the central part connected to the peripheral part is made thick to provide a strong restoring force. I am trying to get it.

[0004]

By the way, in order to satisfy the above-mentioned two characteristics with the same material such as PVC, it is specified only by setting the shape including setting the wall thickness. For this reason, it was necessary to design the shape each time according to the application of the suction cup, and to make a mold according to the shape. In addition, since it depends on the shape, once the shape is set, there is a limit to improving the adsorption property later.

As described above, since the suction force depends on the shape and the material, it is necessary to design the shape corresponding to the required suction force and raise the mold, and even if the suction cup is simple. It was expensive.

The present invention has been made in view of the current state of the art, and an object thereof is to provide a low-cost suction cup that can obtain different suction forces even with the same shape. .

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention has a suction portion formed in a concave shape with respect to a mounting target surface, and a close contact portion including a peripheral portion of the concave portion is applied to the mounting target surface, and further In a suction cup that presses the inner surface against the mounting surface to lower the pressure in the space between the suction surface and the mounting surface and sucks it, the suction part connected to this contact part is made of a soft synthetic resin material. It is made of a hard synthetic resin material.

[0008]

[Action]

 According to the above configuration, since the close contact part is formed of the soft material, the required close contact property can be secured, and the suction part is formed of the hard material, so that the required suction force is ensured. You can In this case, even with the same material, the suction force can be set in a wide range even with the same mold by changing the dimensions of the close contact portion, that is, the peripheral portion and the size of the central portion, that is, the suction portion. .

[0009]

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

FIG. 1 is a sectional view of a suction cup according to a first embodiment of the present invention. In the figure, the suction cup 1 is composed of a close contact portion 2 that abuts on the peripheral edge portion, a suction portion 3 that abuts on the central portion following the peripheral edge portion, and a connecting portion 4 provided on the back side of the suction portion 3.

The close contact part 2 is made of a synthetic resin having a high flexibility and a low friction coefficient such as the above-mentioned PVC or a large number of microscopic pores and an acrylic foam having a high elasticity and a high adhesive property. It is provided in the shape of a strip along the inner surface of the peripheral edge portion 5 of 1. The adsorption part 3 is formed in an umbrella shape by an ethylene-acetic acid copolymer (hereinafter referred to as EVA) or an ethylene-methyl acrylate copolymerized resin (hereinafter referred to as EMA), which is slightly harder than the adhesion part 2, and has a back surface. A projecting connecting portion 4 having a hole 6 for fixing a string or a wire through it is integrally formed. As a result, the article is held on the suction cup 1 via the string or the wire. The peripheral portion 5 and the suction portion 3 are set so as to become thinner toward the tip side, and the tip edge of the peripheral portion 5 is intended to be the softest. The close contact part 2 is fixed to the suction part 3 with an adhesive, a double-sided adhesive tape, thermocompression bonding or high frequency.

In the suction cup 1 configured as described above, when the contact portion 2 is pressed against the surface to be attached, the contact portion 2 extends along the surface, and at the same time, the suction portion 3 spreads and sucks. The inner surface 7 of the part 3 contacts the said surface. As a result, the volume between the suction portion 3 formed in a dome shape and the surface is minimized, and the suction cup 1 is held in a suctioned state on the surface by atmospheric pressure.

The suction force is determined by the pressure due to the atmospheric pressure, the shape retention of the suction portion 3 and the adhesion of the contact portion 2. However, the above-described structure can improve the shape retention and the adhesion. Independent design is possible, and the degree of freedom in design is greatly increased. Further, even if the same mold is used, the suction cups 1 having different characteristics can be freely manufactured by appropriately changing the width and the thickness of the sealing portion 2.

FIG. 2 is a sectional view of a suction cup 1 according to a second embodiment of the present invention. In the second embodiment, the contact portion 2 in the first embodiment described above is provided in a thin shape over the entire inner surface of the suction portion 3, and the edge of the suction portion 3 is arranged from the peripheral portion 5 to the side opposite to the suction portion. The upright portion 8 is provided parallel to the connecting portion 4 by a slight amount, and the upright portion 8 is provided as a clue when the suction cup 1 is removed. The other structure is the same as that of the above-mentioned embodiment.

According to this structure, as in the first embodiment described above, in addition to attaching the contact portion 2 and the suction portion 3 with an adhesive or the like, the contact portion 2 including the upright portion 8 of PVC or acrylic foam is It is possible to integrally mold the inner surface of the suction portion 3 of EVA or EMA with the same thickness, and it is possible to provide the suction cup 1 with a simple mold and excellent in removal performance.

Both the first and second embodiments can be integrally molded by known double molding, and low cost molding is possible. In addition, since vinyl chloride or acrylic foam is used only in the close contact part 2, the amount of vinyl chloride used is much smaller than that of conventional integrally molded products, and the environmental impact of combustion at the time of disposal is also minimal. I can do it. Furthermore, the suction part 3 can be made of a transparent material, and the adhesion part 2 can be made of a colored material, so that a variety of designs can be accommodated.

In the first and second embodiments described above, the contact portion 2 and the suction portion 3 are made of different materials, but the degree of mixing of the plasticizer such as PVC is different. Therefore, in the case of a synthetic resin whose softness and hardness can be arbitrarily set, it is needless to say that the same material set to the softness and hardness required for the contact portion 2 and the suction portion 3 may be used. Is.

As described above, according to these embodiments, the suction cups 3 having the same shape can be formed, and the suction cups 1 having different characteristics can be configured only by changing the shape and material of the close contact portion 2. The degree of freedom can be greatly increased.

[0019]

[Effect of device]

 As is clear from the above description, according to the present invention configured as described above, the suction cup is integrally formed by selectively using two kinds of materials, hard and soft, for the suction part and the close contact part. Even if the same shape is used, the suction force can be set appropriately by simply changing it, and thus the strength of the suction force can be adjusted simply by changing the material of the adhesion part and without newly raising the mold. It is possible to obtain a suction cup that suits the situation of use, and the cost of the suction cup does not increase.

[Brief description of drawings]

FIG. 1 is a sectional view of a suction cup according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a suction cup according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Sucker 2 Adhesive Part 3 Adsorption Part 4 Connecting Part 5 Peripheral Part 6 Hole 7 Inner Surface 8 Upright Part

Claims (1)

[Scope of utility model registration request] 1. An attachment portion having a concave shape with respect to an attachment target surface, a contact portion including a peripheral portion of a concave portion is applied to the attachment target surface, and an inner surface thereof is pressed against the attachment target surface. In a suction cup that lowers the pressure of the space between the surface of the suction portion and the surface to be attached and sucks the suction portion, the contact portion is made of a soft synthetic resin material, and the suction portion connected to the close portion is made of a hard synthetic resin. Sucker characterized by being made of material.