JPS5850099Y2 - 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 industrial applications as tools for handling objects with smooth surfaces such as glass, and in household applications 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', B is a female thread, C is a main body case, and D is a rod body with a male thread A' in the center.
The adsorption diaphragm has a fixed tip, 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 part 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 A is attached near the center of the diaphragm D, and the force of the drive device F is transmitted to the diaphragm D through 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 purpose of this invention is to eliminate the above-mentioned drawbacks of conventional suction cups of this type.When a force is applied to a 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 has a cylindrical 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 the object to be attracted, and a suction diaphragm inside the main case. A piston that is movably fitted in an airtight manner, a piston rod that is connected to the piston and movably penetrates a part of the main body case, and an interior that is surrounded by the main body case, a suction diaphragm, and the piston. The feature lies in that it consists of a sealed space formed in the air, a drive device for moving the piston rod, and a liquid sealed within the sealed space.

In other words, a liquid that does not substantially vaporize even when the pressure is reduced is interposed in the sealed space formed by the adsorption diaphragm, the main body case, and the piston, and by changing the volume of the sealed space, the force of the drive device is increased through the liquid. is applied evenly over the entire diaphragm.

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 piston rod having a male thread 1a on the outer periphery of the upper part and a cylindrical part 1b at the lower part, and a piston 1c is connected to the lower part of the piston rod.

2 is a female screw screwed into the male screw 1a, 3 is a cylindrical body case with an open bottom, and inside it is a piston 1.
c is fitted so that it can be raised and lowered.

3a is a cylindrical portion provided approximately in the upper center of the main body case 3 and supports the piston rod 1 through it so as to be freely raised and lowered; 4 is a suction diaphragm stretched to close the open portion of the main body case 3; 5 is an O-ring; G is a sealed space 6 formed by the piston 1c, the adsorption diaphragm 4, and the main body case 3;
is the liquid sealed in the closed space G, and I is the object to be adsorbed, such as a glass plate.

The female thread 2 is screwed into the male thread 1a of the piston rod 1, which has an earthy smell from the cylindrical portion 3a of the main body case 30. By rotating the female thread 2, the piston rod 1 and the piston 1c connected thereto can be moved up and down. It has a structure that allows it to be slid in the direction.

That is, the drive device 8 is constituted by the female thread 2 and the male thread 1a of the piston rod 1.

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 smooth surface of the object to be sucked E, and the female screw 2 constituting the drive device 8 is rotated.

The piston rod 1 is pulled upward by the rotation of the female screw 2, and the piston 1c can slide upward along the cylinder portion of the main body case 3.

When the piston 1c rises, as shown in Figure 4, histone 1
The volume of the closed space G formed by C, the main body case 3, and the suction diaphragm 4 changes, and as the inside of the closed space G becomes a vacuum, the suction diaphragm 4 is pulled up via the sealed liquid 6. A vacuum section 9 is formed between the adsorption diaphragm 4 and the object to be adsorbed 7.

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

Since the driving force applied from the drive device 8 to the piston rod 1 and the piston 1c is uniformly transmitted to the entire surface of the suction diaphragm 4 through the sealed liquid 6, the suction diaphragm 4 is locally The entire body is pulled upward without being subjected to any force.

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 approximately in accordance with 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 is possible to manufacture even one meter of latex rubber.

In this embodiment, the main body case 3 is provided with a cylindrical portion 3a, through which the piston rod 1 is movably supported, but if the main body case 3 is thick, the cylindrical portion 3a may be omitted. It is also possible to directly penetrate the hole.

Further, 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 of a lever-operated type or a spring-operated type, and in the case of large industrial suction cups, hydraulic Of course, it is also possible to drive by electromagnetic force.

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 drawings]

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... Piston rod, 1c... Piston, 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 cylindrical 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 the object to be attracted, and a suction diaphragm that is movably fitted in an airtight manner inside the main case. a piston rod connected to the piston and movably penetrating a part of the main body case, and a sealed space formed inside surrounded by the main body case, a suction diaphragm, and the piston; A hydraulic suction cup characterized by comprising a drive device that moves a piston rod and a liquid sealed in a sealed space.