JPH042787Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vacuum chuck for suctioning and transferring parts, and particularly to a vacuum chuck that utilizes the ejector effect.

[Conventional technology]

Vacuum chucks that pick up parts and transfer them from one position to the next can be broadly classified into the following two types.

(1) A vacuum generator is installed in a place separate from the vacuum chuck, and the vacuum generator and the vacuum chuck are connected via piping, and the vacuum chuck and anti-chuck are connected by switching between negative pressure and positive pressure. Something that does this. In this case, it is usually impossible to mount a vacuum generator on a vacuum chuck that picks up and moves the parts, so a piping connection is required.

(2) A vacuum generating device using the ejector effect is built into the vacuum chuck or is connected integrally with the vacuum chuck, and the vacuum chuck is turned on by negative pressure, and anti-chuck is performed by stopping the negative pressure and bringing it to atmospheric pressure.

This ejector effect is as shown in Figure 5.
Introducing primary compressed air as a high-speed jet into a primary conduit 3 in which a nozzle 1 and a diffuser 2 are provided, and providing a secondary conduit 4 communicating with the conduit 3 in the vicinity of the nozzle 1, A jet of compressed air on the primary side generates a negative pressure to attract surrounding air, and secondary air is sucked from the secondary pipe line 4 to exert a vacuum suction force.

In addition, the Bakyumu chuck was developed in 1987.
No. 8900, Utility Model Publication No. 161297, 1987, and Japanese Patent Application Publication No. 1987-
The proposals disclosed in the publications of No. 220017 are publicly known.

[Problem that the invention attempts to solve]

According to the first vacuum chuck, since the vacuum generating device and the vacuum chuck are disposed apart from each other, there is a problem that the chuck force is reduced due to pressure loss in the piping connecting them. It was hot. Furthermore, there is a problem in that the air in the internal volume of the piping causes a delay in operation when switching from negative pressure to positive pressure or from positive pressure to negative pressure.

On the other hand, according to the vacuum chuck that utilizes the second ejector effect, positive pressure is not applied during anti-jacking, so if oil or other adhesion occurs between the vacuum chuck and the attracted parts, There was a problem in which the parts did not come off the vacuum chuck and were brought back to their original locations.

For this reason, it is necessary to add an air nozzle or the like in a system separate from the primary pipe line 3 that operates the vacuum chuck, resulting in two pipe systems, which has the disadvantage of complicating the structure.

In all of the proposals disclosed in the three publications mentioned above, the vacuum chuck and the vacuum generator are separated, and the problems caused by the piping described above are not considered.

The present invention has been made in view of the above circumstances, and provides a vacuum chuck that has a simple structure, prevents delay in operation when switching between chuck and anti-chuck, and can reliably attract and remove parts. The purpose is to

[Means for solving problems]

In order to achieve the above object, the present invention provides a primary side pipe line in the chuck body for circulating compressed air from an intake port formed in the chuck body toward an exhaust port, and a primary side pipe line is provided in the chuck body in the middle of the primary side pipe line. In the vacuum chuck, a secondary pipe line is connected to the formed nozzle part, and a high-speed jet of compressed air flowing through the nozzle part brings the secondary pipe line into a substantially vacuum state to attract parts. The side conduit is opened through the chuck conduit to the suction surface of the chuck main body that suctions the component, and the exhaust port is configured to be closable by a member to which the component is attached.

[Effect]

According to the above configuration, compressed air introduced from the inlet port passes through the nozzle, becomes a high-speed jet, and is discharged from the exhaust port. The parts are attracted to the suction surface of the chuck body through the chuck conduit connected to the next conduit.

In addition, by blocking the exhaust port with a part of the member to which this part is attached, the compressed air introduced into the primary pipe enters the secondary pipe, stopping the ejector effect and conversely It is ejected from the suction surface through the conduit, causing the parts to separate from the chuck body. These operations are performed instantly and reliably.

〔Example〕

Hereinafter, one embodiment of the vacuum chuck according to the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. An intake port 6 is formed at one end of the chuck body 5, which is formed in a substantially cylindrical shape, and an exhaust port 7 is formed at the other end on the central axis.
The exhaust port 7 and the exhaust port 7 are communicated with each other by a primary pipe line 8 provided on the central axis.

This primary side conduit 8 is provided with a nozzle 9 on the intake port 6 side and a diffuser 10 on the exhaust port 7 side. A pair of secondary pipes 11 are radially connected to both sides of the nozzle 9, and each of these secondary pipes 11 is connected to a chuck pipe 12 formed parallel to the primary pipe 8. has been done. These chuck pipes 12 are connected to the chuck main body 5.
It opens to the suction surface 5a on the side where the exhaust port 7 is formed.

Next, the operation of this embodiment will be explained. FIG. 1 shows a state in which a part 13 to be transferred is suctioned. This component 13 has a ring shape with a hole 13a formed in the center. When compressed air is supplied from the intake port 6 of the chuck body 5, the air flows into the nozzle 9 and the diffuser 10, and negative pressure is generated in the secondary pipe line 11 due to the ejector effect, and the chuck is discharged through the chuck pipe line 12. The component 13 is attracted to the attraction surface 5a of the main body 5.

The component 13 thus attracted to the chuck body 5 is transferred onto a member 14 having a protrusion 14a on which the component is mounted. The inner diameter of the exhaust port 7 formed in the chuck body 5 is made equal to the outer diameter of this protrusion 14a in advance.
By lowering the chuck body 5, the protrusion 14
a is fitted into the exhaust port 7 in a substantially airtight manner.

At this time, the exhaust port 7 is closed by the protrusion 14a, so the flow of air in the primary pipe 8 downstream of the nozzle 9 is stopped, and the ejector effect is stopped. The compressed air then flows into the secondary pipe line 11, passes through the chuck pipe line 12, and passes through the suction surface 5a.
The component 13 is released from the suction surface 5a, and the protrusion 14a of the component 14 is inserted into the hole 13a of the component 13 and mounted in a predetermined position.

If the chuck main body 5 is removed from the protrusion 14a of the member 14, the chuck becomes possible again as shown in FIG.

According to this embodiment, the ejector effect is used to operate the vacuum chuck to chuck and anti-chuck the component 13, thereby eliminating insufficient suction force and delay in operation time due to the influence of the conduit.

Also, when anti-yucking, compressed air is used to remove parts 13.
Since the part 13 is removed from the chuck body 5,
Even if the chuck body 5 and the chuck body 5 are sticky with oil or the like, anti-chuck can be ensured.

Further, for this reason, there is no need for additional parts such as an air nozzle that were conventionally necessary, and the protrusion 1 of the member 14 is not required.
It is only necessary to close the exhaust port 7 with the exhaust port 4a, and the piping system can be simplified, resulting in a significant cost reduction.

3 and 4 are cross-sectional views showing the chuck and anti-chuck states, respectively, showing other embodiments of the present invention. In this case, the primary side conduit 8 is formed.

This embodiment is a suitable example for mounting a flat plate-shaped part 13 into a hole 14b formed in a member 14, and the outer diameter of the chuck body 5 is formed to be equal to the inner diameter of the hole 14b of the member 14. ing. Therefore, by inserting the chuck body 5 into the hole 14b of the member 14, the opening of the exhaust port 7 formed on the outer peripheral surface of the chuck body 5 is closed by the inner peripheral surface of the hole 14b. The same operation and effect as the first embodiment described above is produced.

The shape of the chuck main body 5 and the structure of the secondary side conduit 12 in each of the embodiments described above are not limited to those shown in the drawings, and other shapes or structures may be used without departing from the spirit of the present invention. It may be hot.

[Effect of idea]

As described above, according to the present invention, the exhaust port of the chuck body of the vacuum chuck that utilizes the ejector effect can be closed by the member to be mounted of the component transferred and mounted by the vacuum chuck. With a simple structure, components can be reliably attracted and removed.

[Brief explanation of the drawing]

1 and 2 are vertical cross-sectional views showing one embodiment of the vacuum chuck according to the present invention during chuck and anti-chuck, respectively, and FIGS. 3 and 4 show other embodiments of the present invention, respectively. FIG. 5 is a vertical cross-sectional view showing the ejector effect during chuck and anti-chuck. 5...Chuck body, 5a...Adsorption surface, 6...
Inlet port, 7...Exhaust port, 8...Primary side pipe line, 9...Nozzle, 11...Secondary side pipe line, 12...
...chuck pipe, 13...parts, 14...members.

Claims (1)

[Scope of utility model registration request] A primary side conduit for circulating compressed air from an inlet port formed in the chuck body toward an exhaust port is provided in the chuck body, and a secondary side conduit is provided in a nozzle portion formed in the middle of the primary side conduit. In the vacuum chuck, which attracts parts by making the secondary side pipe into an almost vacuum state by a high-speed jet flowing through the nozzle part, the secondary side pipe is connected to the chuck main body through the chuck pipe. A vacuum chuck characterized in that the suction surface for suctioning the component is open, and the exhaust port can be closed by a member to which the component is attached.