JPH0744468Y2 - Sucker for work handling - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction cup for adsorbing and handling a small, disk-shaped work.

[0002]

2. Description of the Related Art For example, a synthetic resin injection molded product (workpiece)
A chucking attachment with a suction cup is used to handle a small and lightweight work such as when the work is taken out of the mold or the work is transferred to the next step in an assembly line. In other words, the suction cup is made of a highly flexible synthetic resin such as silicon rubber, and the opening of the vacuum hole formed in the center faces the thin lip integrally formed at the tip. Are mounted on the mounting plate, and the plurality of suction cups are simultaneously adsorbed on the surface of the work for handling. When the work is disc-shaped like a compact disc, a chucking attachment in which a plurality of suction cups are arranged on the same circumference is used.

[0003]

Recently, a mini-compact disc having an outer diameter of 2.5 inches has been developed. However, this mini-compact disc cannot adsorb a suction cup in the signal area near the outer circumference. Therefore, it is necessary to suck and handle the suction cup in a narrow area in the center portion outside the signal area. Therefore, in the chucking attachment having the above structure, it is necessary to use a small suction cup, and the number of suction cups is reduced. Therefore,
There was a problem that the work did not come off during handling because the suction force was not sufficient to hold the work. Further, when there is a circular stepped portion outside the signal area, it is necessary to avoid the stepped portion and suck the suction cup, and the suctionable range becomes even narrower, which makes handling difficult.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a work-piece suction cup which is a disk-shaped work having a narrow suction-capable range and which can be surely held even if there is a step on the surface.

[0005]

In order to achieve the above object, a work-handling sucker according to the present invention is provided with a surface of a work on a tip end of a cylindrical sucker body made of a highly flexible synthetic resin. The inner and outer lips that are in close contact with each other are integrally formed concentrically so that the opening of the vacuum hole formed in the suction cup body faces between the inner lip and the outer lip. The height levels of the lips are different, and the virtual circle between the inner lip and the outer lip is equal to the diameter of the step.

[0006]

[0007]

In other words, since the inner lip and outer lip, which are the suction parts, are ring-shaped, it is possible to secure a wide suction area with only one suction cup, and for disc-shaped workpieces with a narrow suction cup suction range. Even if there is, the narrow central part of the work can be securely attracted and held, but since the height level of the inner lip and the outer lip are different, even if there is a circular step on the surface of the work, Align the suction part between the inner lip and the outer lip with the stepped part, and make the lip with the lower height level adhere to the lower surface, and the lip with the higher height level adhere to the higher surface. By doing so, it is possible to surely hold.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. In FIG. 1, the suction cup body 1 is made of a highly flexible synthetic resin such as silicon rubber, and has an outer diameter of 25 mmφ, an inner diameter of 14.5 mmφ, and a height of 14 mm.
It is a cylindrical body. An annular locking groove is provided on the outer circumference of the suction cup body 1.
11 and an annular ventilation groove 41 are also formed. The annular projection 51 of the mounting plate 5 is attached to the mounting plate 5 in a state of engaging with the locking groove 11. And the mounting plate 5
A vent hole 52 connected to a decompression device is formed in the vent hole 52, and the vent hole 52 communicates with the vent groove 41.

An inner lip 3 and an outer lip 2 are formed concentrically and integrally with the tip edge of the suction cup body 1. Each of the inner lip 3 and the outer lip 2 is a thin body extending obliquely at an angle of about 45 °, and in this embodiment, the inner lip 3 is longer and has a lower height level. This is because, as will be described later, the outer lip 2 is made longer by raising the outer lip 2 when adsorbing to a work having a concave circular step on the surface. Sa lower the level.

Inside the suction cup body 1, as shown in FIG.
Each vacuum hole 4 is formed, and the vacuum hole 4
Openings at both ends of the front end face the space between the inner lip 3 and the outer lip 2 and the ventilation groove 41. In other words, the ring-shaped inner lip 3 and the outer lip 2 communicate with the pressure reducing device, and the space between the inner lip 3 and the outer lip 2 is a ring-shaped suction portion of the suction cup. Therefore, this suction portion is formed by connecting the circular suction portions of the conventional suction cup into a ring shape, and is much larger than the suction portion of one conventional suction cup.

The work 6 is handled by the suction cup having such a structure. The work 6 is, for example, a mini compact disc having an outer diameter of 2.5 inches, and is taken out from the mold of the molding machine. A concave circular step 61 having a diameter of 17 mmφ is formed in the center of the work 6 away from the signal area, and the size of the circular step 61 is equal to the virtual circle between the inner lip 3 and the outer lip 2. ing. In addition, the sprue runner 62 projects in the center when molded with a mold.

Then, the suction portion between the inner lip 3 and the outer lip 2 is pressed against the step 61 of the work 6 by inserting the sprue runner 62 inside the suction cup body 1.
As a result, the inner lip 3 comes into close contact with the lower surface of the work 6, and the outer lip 2 comes into close contact with the higher surface. Then, when a depressurizing device (not shown) is operated, the work 6 is adsorbed and can be handled. Even if there is a convex step 61 on the surface of the work 6, as described above, the inner lip 3
And the outer lip 2 can be held securely by adjusting the height level of the outer lip in reverse.

Thus, the inner lip 3 and the outer lip 2 are
Since the ring-shaped suction part is much larger than the suction part of the conventional single suction cup, one suction cup has a strong suction force and strongly sucks in a narrow suction range, and disk-shaped workpieces. 6 can be held reliably. Further, since the height levels of the inner lip 3 and the outer lip 2 are made different, it is possible to surely hold even if there is a step on the surface.

[0014]

As described above, the work-handling suction cup of the present invention has the inner lip and the outer lip formed at the tip edge of the cylindrical suction cup body, and has the ring shape between the inner lip and the outer lip. Since a large suction part is formed and the height level of the inner lip and the outer lip are made different, it is possible to securely hold even a disk-shaped work with a narrow suction surface and a step on the surface. it can.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a bottom view of the embodiment of the present invention.

[Explanation of symbols] 1 suction cup body 2 outer lip 3 inner lip 4 vacuum hole 41 ventilation groove 5 mounting plate 6 work piece 61 step

Claims (1)

[Scope of utility model registration request] 1. A suction cup body, wherein a cylindrical suction cup body made of a highly flexible synthetic resin is integrally formed concentrically with an annular inner lip and an outer lip which are closely attached to the surface of the work. The opening of the vacuum hole formed inside faces between the inner lip and the outer lip, and the height level of the inner lip and the outer lip are different, and the virtual circle between the inner lip and the outer lip is the circular shape of the work surface. A suction cup for work handling, which is equal in diameter to the step.