JPS587134Y2 - hydraulic suction cup - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of a suction cup.

Suction cup structure mounting devices are widely used in industry as tools for handling smooth surfaces such as glass, and in household use as metal fittings for hanging small items.

FIGS. 1 and 2 schematically show a conventional suction cup of this type when it is not in operation and when it is in operation.

In the figure, A is a rod body with a male thread A' screwed into it, B is a female thread, C is a main body case, and D is a rod body with the male thread A' in the center.
E is an adsorption diaphragm to which the tip of E is fixed, and E is an object to be adsorbed, such as a glass plate.

The suction cup rotates the female screw B of the drive device F, which is composed of a male screw A' and a female screw B, and lifts the rod body A upward and lifts the central part of the diaphragm D connected to the rod body A.
By forming a vacuum section GO below the adsorbed object E.
It is configured to suction and stick.

All conventional suction cups have a structure in which the tip of the rod body is attached near the center of the diaphragm D, and the force of the drive device F is transmitted to the diaphragm D via this.

As a result, the driving force is applied only to the center of the diaphragm D, which causes the diaphragm D to deform and makes it difficult to generate a sufficient vacuum suction force.

In particular, the diaphragm D needs to be selected to have good adhesion to the object E, and a material that is too hard is not convenient.

However, if the diaphragm D is flexible and has good adhesion, only the center part connected to the rod body A will be lifted upward, and even if the diameter of the diaphragm D is increased, the suction force generated by the vacuum part Go will be reduced. I can't make it bigger.

Further, since force is concentrated on the diaphragm D and the attachment part H of the rod body A, there is a drawback that the attachment part H is likely to be damaged during repeated use.

The present invention aims to eliminate the above-mentioned drawbacks of conventional suction cups of this type.When force is applied to the liquid in a sealed container, the force is transmitted equally in all directions. By focusing on this and applying this to the suction cup, the objective is to provide a hydraulic suction cup that generates sufficient vacuum suction force close to the theoretical value and prevents damage to the diaphragm due to local stress. It is.

The hydraulic suction cup of the present invention consists of a container-shaped main body case with one side open, a suction diaphragm that is stretched to close the open part of the main case and can come into close contact with an object to be sucked, and a main body case and a suction A sealed space formed inside surrounded by a diaphragm, a rod-shaped rod body that is movably provided by penetrating a part of the main body case in an airtight manner, a drive device that moves the rod body, and a drive device that moves the rod body; It is characterized by the fact that it is composed of a liquid enclosed in a liquid.

That is, by interposing a liquid that does not substantially vaporize even when the pressure is reduced in the sealed space formed by the adsorption diaphragm and the main body case, and changing the volume of the sealed space, the force of the driving device is transferred to the diaphragm through the liquid. It was made to be applied evenly throughout.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of embodiments of the present invention will be explained below based on the drawings.

3 and 4 are longitudinal sectional views showing the hydraulic suction cup according to the embodiment of the present invention when it is not in operation and when it is in operation.

In the figure, 1 is a rod-shaped rod having a male thread 1a on the outer periphery of the upper part and a cylindrical part 1b at the lower part, 2 is a female thread screwed into the male thread 1a, and 3 is a vessel-shaped rod with an open bottom. a main body case, 3a is a cylindrical portion provided approximately in the upper center of the main body case 3 and supports the rod body 3 through it so as to be movable up and down; 4 is a suction diaphragm stretched to close the open portion of the main body case 3; 5 is an O-ring, G is an adsorption diaphragm 4
and a sealed space formed by the main body case 3, 6 is a liquid sealed in the sealed space G, and 7 is an object to be adsorbed, such as a glass plate.

The female thread 2 is screwed into the male thread 1a of the rod body 1 which is located above the cylindrical portion 3a of the main body case 30.
By rotating the rod body 1, the rod body 1 inserted in an airtight manner into the cylindrical portion 3a is slidably driven in the vertical direction.

That is, by the female thread 2 and the male thread 1a of the rod body 1,
A drive device 8 is configured.

The adsorption diaphragm 4 is made of latex rubber, and the sealed liquid 6 is a liquid that does not substantially vaporize even when the pressure is reduced, such as vacuum pump oil or silicone oil.

Next, the effect will be explained.

The outer surface of the suction diaphragm 4 is pressed against the flat surface of the object to be sucked E, and the female screw 2 constituting the drive device 8 is rotated.

The rod body 1 is pulled upward by the rotation of the female screw 2,
The cylindrical portion 1b slides upward along the cylindrical portion 3a.

When the cylindrical part 1b rises, the main body case 3
The volume of the closed space G formed by the adsorption diaphragm 4 changes, and the inside of the closed space G becomes a vacuum, so that the adsorption diaphragm 4 is pulled up through the sealed liquid 6, and the adsorption diaphragm 4 A vacuum section 9 is formed between the sample 4 and the object 7 .

As a result, the object to be attracted 7 is suctioned and fixed.

Since the driving force applied to the rod body 1 from the driving device 8 is uniformly transmitted to the entire surface of the suction diaphragm 4 via the sealed liquid 6, the suction diaphragm 4 is free from local forces. The entire body will be pulled upwards without receiving any pressure.

As a result, the area up to the full diameter of the suction diaphragm 4 is effectively utilized for suction and fixation, and the suction force of the vacuum section 9 can be generated to approximately the theoretical value.

Since the adsorption diaphragm 4 is not locally subjected to large forces, it will not be damaged at all even if it is used repeatedly.

Since virtually no force is applied to the adsorption diaphragm 4, it is possible to use an extremely thin and soft material that has good adhesion to the adsorbed object E, and if necessary, it can be made of an extremely thin and soft material.
It can also be manufactured using just one piece of latex rubber.

In this embodiment, the main body case 3 is provided with a cylindrical portion 3a, through which the rod body 1 is movably supported, but if the main body case 3 is within the thickness, the cylindrical portion 3a may be omitted. In this embodiment, the drive device 8 is constructed by screwing together the male screw 1a and the female screw 2, but it may also be a lever actuated type or a spring actuated type. In the case of large industrial suction cups, it goes without saying that hydraulic or electromagnetic force may be used to drive the suction cup.

As mentioned above, the present invention is configured to transmit the driving force from the drive device to the adsorption diaphragm via the sealed liquid, so the driving force is uniformly transmitted over the entire area of the adsorption diaphragm. In addition to being able to efficiently obtain an extremely high suction and fixing force, there is no risk of breakage even if the suction diaphragm is flexible and has good suction properties, and has excellent practical utility.

[Brief explanation of the drawing]

FIGS. 1 and 2 are longitudinal sectional views of a conventional suction cup when it is not in operation and when it is in operation. 3 and 4 are longitudinal cross-sectional views of the hydraulic suction cup according to the embodiment of the present invention when it is not in operation and when it is in operation. 1...Rod body, 3...Body case,
4... Adsorption diaphragm, 6... Liquid, 7... Adsorbed object, 8... Drive device, G... Closed space. .

Claims (1)

[Scope of utility model registration request] A container-shaped main body case with one side open, an adsorption diaphragm stretched to close the open part of the main case and tightly adhere to the object to be adsorbed, and an interior surrounded by the main case and the adsorption diaphragm. A sealed space formed in the airtight space, a rod-shaped rod body that is movably provided through a part of the main body case in an airtight manner, a drive device that moves the rod body, and a liquid sealed in the sealed space. A hydraulic suction cup characterized by its structure.