JP2006250266A - Suction cup - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction cup having excellent sucking force even if the same is applied to a rough surface or a curved surface. <P>SOLUTION: The sucking cup applicable to the rough surface and/or the curved surface consists of a suction cup main body including a round dome shape suction cup main body made of elastic body, and an incidental sheet part joined to a bottom surface part of the suction cup main body having the round dome shape. The incidental sheet part is a sheet material of predetermined hardness and strength having elasticity provided with a adhesion agent layer on a lower surface. A flat surface shape of the incidental sheet part includes an opening part opening at a recess part of the suction cup main body on a part inside more than a joining part with the suction cup main body. A wide area part largely extending to an opposite side of a loading direction of the suction cup main body in relation to a joined suction cup main body position at least at a time of use is included. A detachment grip part positioned at least on the opposite side in relation to the wide area part in the loading direction is provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a suction cup.

Conventionally, suction cups using vacuum are often used to support articles on a wall surface or the like.
Generally, the suction cup structure has a circular dome shape with a thin peripheral part that is rich in elasticity. By pressing this against a flat surface and pushing out air inside the circular dome shape, the inside of the circular dome shape is evacuated, and the vacuum The suction cup is bonded and supported on a flat surface such as a wall by the suction force of the above.
Accordingly, whether or not the degree of vacuum is generated and maintained is determined by the adhesion between the outer circumferential portion of the circular dome-shaped suction cup and the flat surface, and various improvements have been made in the past.
As one method of this improvement, there is a method in which the shape of the outer circumferential portion of the suction cup has a double structure, and a certain degree of effect can be expected. (For example, see Patent Document 1)
Another method of improvement is to apply or attach an appropriate adhesive to the adhesive surface with the flat surface of the outer circumferential portion of the suction cup to improve the adhesion. (For example, see Patent Document 2)
In addition, in order to stably adsorb the suction cup to the rough surface, there is a case in which a separate auxiliary adhesion sheet coated with an adhesive is used for the purpose of improving the opposite surface itself to be adsorbed.
Utility Model Registration No. 3105275 Japanese Patent Laid-Open No. 2004-249032

However, in order to improve the adhesion to rough surfaces and curved surfaces, the shape of the outer circumferential portion of the suction cup described above having a double structure is costly to form, and the adsorbing force, particularly for curved surfaces Responsiveness is greatly affected by the shape of the large and small-diameter casing, and sufficient adsorption force cannot always be maintained.
In addition, there are many methods such as attaching a strong adhesive or adhesive substance to the suction surface of the suction cup, and improving the suction partner surface itself by interposing a suction auxiliary sheet coated with a separate adhesive. In this case, since the adhesive layer has a strong adhesive force, when the adhesive layer is peeled off, the adhesive residue may remain on the adhesion plane or the plane may be scratched.
In view of the above, the present invention provides a suction cup that is mainly used for home use, etc., which is excellent in suction power with the mating surface and can maintain the suction power for a long time even when applied to a rough surface or curved surface. That is the purpose.

The suction cup of the present invention is
1) A suction cup applicable to a rough surface and / or curved surface, comprising a suction cup body having a circular dome shape made of an elastic body, and an incidental sheet portion joined to a bottom surface portion of the suction cup body having the circular dome shape. Become
The incidental sheet portion is made of a sheet material having a predetermined hardness and strength with an adhesive layer provided on the bottom surface and having high elasticity, and the planar shape of the incidental sheet portion is on the inner side of the joint portion with the suction cup body. A portion having an opening that opens in a recess of the suction cup body, and a wide area portion that greatly extends at least on the opposite side of the suction direction of the suction cup body when used, with respect to the position of the sucker body joined; , With respect to the large area portion in the load direction, it is provided with a peeling knob located at least on the opposite side,
2) In the above-mentioned 1), the incidental sheet portion has an area of 70 to 100% of the inner surface area of the bottom surface of the suction cup body having the circular dome shape. The length in the load direction from the center of the inner diameter of the suction cup body is (0.5 to 1.5) times the inner diameter of the bottom face of the suction cup body.
3) The incidental sheet part in the above 1) or 2) is a hard or soft synthetic resin sheet having a thickness of 0.1 to 1 mm, and the adhesive layer on the bottom surface is made of an adhesive having a coating thickness of 0.4 to 1 mm. It is.

The suction cup of the present invention is
4) In the above 1) to 3), the incidental sheet portion has a desired shape and / or a desired color and pattern. 5) In the above 1) to 3), the basic of the incidental sheet portion The shape constitutes a square or oval shape,
6) In the above 4), the shape of the accessory sheet portion is a modified shape of a heart shape,
7) In the above 4), the desired shape of the accompanying sheet portion is a shape obtained by modifying a character.

  The present invention can provide a suction cup that can maintain a suction force for a long time even when applied to a rough surface or a curved surface due to the structure of the suction cup, has a high degree of freedom with respect to the place of use, and has an excellent suction force. .

Embodiment 1
1A and 1B are explanatory views showing an example of a suction cup structure according to Embodiment 1 of the present invention, in which FIG. 1A is a plan view and FIG. 1B is a cross-sectional view taken along line AA.
2A and 2B are explanatory diagrams showing another example of the suction cup structure according to Embodiment 1 of the present invention, in which FIG. 2A is a plan view and FIG. 2B is a cross-sectional view taken along the line AA. .
In the figure, 1 is a suction cup, 2 is a suction cup body, 21 is a circular dome-shaped top, 22 is a recess, 23 is a load point, 24 is a hook, 3 is an accompanying sheet, 31 is a wide area, and 32 is a peeling knob. The part 33 is an adhesive layer.

In the first embodiment, the suction cup body 2 has basically the same shape as a commercially available suction cup, and a commercially available suction cup can also be used. The circular dome-shaped top portion 21 of the first embodiment is thin at the periphery thereof, and the accompanying sheet portion 3 is welded by high-frequency heating or the like, or has a strong thermosetting property, with the bottom surface portion of the thin wall as a joining surface. They are joined by bonding with an adhesive.
The planar shape of the accessory sheet portion 3 has a basic rectangular shape (FIG. 1) or an elliptical shape (FIG. 2), and the suction cup body 2 is located on the inner side of the joint with the suction cup body 2. The suction part 34 has an opening 34 opened in the concave part 22 and extends greatly at least on the opposite side of the weighting direction applied to the hook 24 of the weighting point 23 of the suction cup body 2 when used. And a peeling knob 32 that is positioned at least on the opposite side to the wide area 31 in the load direction.

The accessory sheet portion 3 is composed of a hard or soft synthetic resin sheet, and has sufficient adaptability to a rough surface or curved surface, and a stable adhesive layer on the bottom surface. It is important that 33 is provided.
From many experiments, the incidental sheet portion 3 is preferably a synthetic resin sheet having a thickness of about 0.1 to 1 mm, and the synthetic resin sheet has a predetermined hardness and tensile strength that do not cause permanent deformation during peeling. In addition, it is necessary to have flexibility (elasticity) capable of sufficiently responding to a curved surface, and a material having a relatively high hardness and tensile strength and rich in elasticity is suitable.
That is, when the hardness is low and the tensile strength is weak, the sheet is deformed at the time of peeling, and it is not considered that repeated use is impossible.

As a result of various experiments, it has been found that it is desirable that the hardness H is 90 or more on the Rockwell M scale and the tensile strength σt is 40 N / mm ² or more with little deformation at the time of peeling.
The material is preferably PET, vinyl chloride or the like.
However, as H and σt are increased, the bending modulus E is also increased, and the response to a curved surface, which is one of the objects of the present invention, is rather lowered. Therefore, the response (flexibility) to the curved surface must be dealt with by reducing the thickness or suppressing the hardness and tensile strength slightly. In this sense, the thickness is preferably about 0.1 to 1 mm as described above.
In addition, it is preferable to select a soft elastomer material sheet having a hardness according to JIS K6253 of about 10 to 15 when applied to an extremely small curved radius of curvature.

Moreover, regarding the adhesive layer 33 on the bottom surface, the coating thickness was about 0.4 to 1 mm, and it was found that the material is preferably an adhesive such as urethane.
The size of the opening 34 needs to be equal to or smaller than the inner diameter of the bottom surface of the suction cup body 2 and is preferably 70 to 100% of the inner surface area of the bottom surface.

Basically, the combination of the suction cup body 2 and the incidental sheet portion 3 is intended to supplement the response to the curved surface, that is, the limit of the sustained adsorption force, with the area of the incidental sheet 3 and the adhesive force. It is said.
As a result of the substantial test, the response to the curved surface of the suction cup body 2 having a diameter D is as follows. The curved surface is a cylindrical curved surface, and the radius of curvature R is k = R / D value. It was about k> = 1.5, and the knowledge that the adsorption | suction load in the limit point falls to about 0.2 to 0.5 times each of the adsorption | suction power with respect to a plane was acquired.
This is considered to be caused when the suction cup is pressed against the curved surface, the deflection at the flat bottom surface of the suction cup is not uniform around the circumference, and the diameter expands and contracts with respect to the axial direction of the uneven cylindrical curved surface.

  In the present invention, in order to compensate for at least the reduced suction force of the suction cup main body 2 generated on the rough surface or the curved surface, an additional sheet portion 3 that can cover the rough surface or the curved surface in a predetermined area range is added. This needs to be covered. Moreover, adding the incidental sheet portion 3 having the wide area portion 31 also has an effect of covering the non-adhesive portion due to this wide area even with respect to some of the webiness of the mating suction surface.

In addition, the phenomenon in which the suction force is peeled off by the load is generated by a moment generated by the load applied mainly on the opposite side of the load point 23 of the suction body 2 because the suction force by the vacuum is uniform on the circumference of the bottom surface. To do. Therefore, it is important to arrange the wide area portion 31 on the side opposite to the weighting direction, and the feature of the present invention lies in dealing with the peeling force due to weighting.
The large area portion 31 of the incidental sheet portion 3 for covering the rough surface or the curved surface in a certain predetermined area range has an adhesive force that can sufficiently balance and cope with at least the moment acting as the peeling force, that is, the moment force. It is necessary to have about twice the adhesive strength.
When the k value is 1.5, the weighted axial length L of the wide area portion 31 needs to be at least 0.5 times the bottom outer diameter D of the suction cup body 2. However, even if the length exceeds L = 1.5 · D, the effect of the moment force deviates from the main influence part, and the anti-weighting effect is thin, which is not economically undesirable and is not preferable in handling. Therefore, the length L in the weighted axial direction of the wide area portion 31 is set to a range of 0.5 to 1.5 times the bottom surface outer diameter D of the suction cup body 2.

As described above, the suction cup 1 according to the first embodiment is intended to achieve an extremely large increase in adsorbing force and its continuity maintenance as compared with a conventional countermeasure product in which an adhesive layer is simply provided on the bottom circumferential portion of the suction cup. It is something that can be done.
Therefore, for the reasons described above, the incidental sheet portion 3 has sufficient flexibility to adapt to a rough surface and / or curved surface and the properties of the adhesive layer 33, and a wide area portion having the above specifications on the opposite side to the load direction. It is important to provide 31.
In addition, it is preferable that the opening part 34 of the incidental sheet part 3 in a joining part with the suction cup main body 2 has an area of 80 to 100% of the inner surface area of the bottom face part of the suction cup main body 2. If the area of the opening 34 is 80% or less, it is difficult to discharge air when creating a vacuum, that is, when discharging air from the concave portion 22 of the circular dome-shaped top portion 21.

Next, in the first embodiment, the property of the adhesive layer 33 provided on the bottom surface of the incidental sheet portion 3 is effective mainly for the surface property of the opposite suction surface to be suctioned.
The normal suction cup 1 is very poor in adaptability to a surface with a rough or non-uniform surface roughness in the sense that the degree of vacuum for adsorption cannot be maintained sufficiently.
Therefore, the thickness and the adhesive force of the adhesive layer 33 in the first embodiment need to sufficiently cover the rough surface and the non-uniform surface while simultaneously covering the adhesive force due to the curved surface. is there.
As described above, as a result of many experiments, it was found that the coating thickness of the adhesive layer 33 is preferably about 0.4 to 1 mm, and the material is preferably a urethane elastomer adhesive.
If the coating thickness is 0.4 mm or less, it cannot sufficiently cope with the rough surface, and if it is 1 mm or more, a cleaved surface against the load is generated in the adhesive layer, and the adhesive force is rather negative. Accordingly, the coating thickness is 0.4 to 1 mm.

Embodiment 2
FIG. 3 is a diagram illustrating an example of an incidental sheet portion according to Embodiment 2 of the present invention.
In FIG. 3, the shape of the accompanying sheet 3 is a shape obtained by modifying a heart shape as one of the desired shapes.
The specification as the accessory sheet 3 has the wide area portion 31, the peeling knob portion 32, the opening portion 34, and the adhesive layer 33 on the bottom side as in the case of the first embodiment.
In FIG. 2, the wide area portion 31 is disposed on the opposite side of the load direction, and the peeling knob 32 is disposed on the load direction side.
The numerical specifications of each part are determined according to the first embodiment, and the heart-shaped part can be given a color such as red depending on the taste.
The incidental sheet 3 of the second embodiment is bonded to the circumferential surface of the bottom surface of the suction cup body 2 that has been facilitated in advance by high-frequency heating or the like.

Embodiment 3
FIG. 4 is a diagram showing an example of a suction cup according to Embodiment 3 of the present invention.
In FIG. 4, the shape of the accompanying sheet 3 is a shape in which the character is modified as one of the desired shapes (in this embodiment, “mouse” is imaged).
The suction cup body 2 just hits the mouth portion of the “mouse”, and the head side occupies the wide area portion 31 of the present invention. Since the specifications of the other parts are the same as those in Embodiments 1 and 2, the description thereof is omitted.
Characters such as bears, elephants, rabbits, bulldogs, cats, frogs, etc. can be created according to the taste of the product in addition to “mouse”.

  The specifications in the above-described embodiments, in particular, the shape of the incidental sheet 3 show one example, and are not limited to these, and are modified within the scope of the claims. be able to.

  In the embodiment of the present invention, a small suction cup is mainly described in a home or the like, but this can also be applied to a large suction cup as a weighting point in a large structure for industrial use or construction use.

It is explanatory drawing which shows one example of the structure of the suction cup concerning Embodiment 1 of this invention, (a) is a top view, (b) is sectional drawing of AA arrow. It is explanatory drawing which shows another example of the structure of the suction cup concerning Embodiment 1 of this invention, (a) is a top view, (b) is sectional drawing of AA arrow. It is a figure which shows one example of the incidental sheet part which concerns on Embodiment 2 of this invention. It is a figure which shows one example of the suction cup which concerns on Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Suction cup 2 Suction cup main body 21 Circular dome-shaped top part 22 Recessed part 23 Weighted point part 24 Hook 3 Attached sheet part 31 Large area part 32 Peeling part for peeling 33 Adhesive layer

Claims (7)

A suction cup applicable to a rough surface or / and a curved surface, comprising a suction cup body having a circular dome shape formed of an elastic body, and an incidental sheet portion joined to a bottom surface portion of the suction cup body having the circular dome shape,
The incidental sheet portion is made of a sheet material having a predetermined hardness and strength and rich in elasticity with an adhesive layer provided on the bottom surface, and the planar shape of the incidental sheet portion is on the inner side of the joint with the suction cup body. An opening that opens in the recess of the suction cup body in the part, and has a wide area portion that greatly extends at least on the opposite side to the load direction in the suction cup body when in use, with respect to the position of the sucker body joined, Moreover, the suction cup characterized by including the peeling knob part located at least on the opposite side with respect to the large area part of a load direction.   The auxiliary sheet portion has an area of 70 to 100% of the inner surface area of the bottom surface of the suction cup body having an opening at the circular dome shape, and the load direction from the center of the suction cup body inner diameter of the wide area portion The suction cup according to claim 1, wherein the length is (0.5 to 1.5) times the inner diameter of the bottom face of the suction cup body.   The attached sheet portion is a hard or soft synthetic resin sheet having a thickness of 0.1 to 1 mm, and the adhesive layer provided on the bottom surface is made of an adhesive having a coating thickness of 0.4 to 1 mm. Item 3. The suction cup according to item 1 or 2.   The suction cup according to any one of claims 1 to 3, wherein the incidental sheet portion has a desired shape and / or a desired color or pattern.   The suction cup according to any one of claims 1 to 3, wherein a basic shape of the incidental sheet portion forms a quadrangular or elliptical shape.   The suction cup according to claim 4, wherein the shape of the accessory sheet portion is a shape obtained by modifying a heart shape. The suction cup according to claim 4, wherein the shape of the accessory sheet portion is a shape obtained by modifying a character.

Images