JPS61241088A - Vacuum sucker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to equipment used for transporting workpieces, and more particularly to a vacuum suction device for holding the workpieces.

2. Description of the Related Art Conventionally, a special vacuum suction device has been used, for example, to apply a suction pad to the surface of a workpiece, apply a certain amount of weight to the workpiece, suck the air in the space between the workpiece and the suction bat, and create a vacuum area to suction the workpiece. There is No. 55-37210.

FIG. 3 is a vertical cross-sectional view of the main part of the vacuum adsorption device, in which 1 is an adsorbent, which has an inverted T shape and has a small hole 2 for flowing gas in the center. Alternatively, several of them communicate with the ring-shaped groove 3. A head cover 5 is removably fixed on the convex part of the adsorbent 1, and the central pore 2 extends and is connected to another pipe 4 through the head cover 5, which is connected to a vacuum pump (not shown). There is. A base plate 6 is located between the base 10 of the adsorbent 1 and the head cover 5 together with the spring 7. The base plate 6 is movable in the vertical direction and is placed on the spring 7. 8 is a suction pad, and the materials of the outer side 8a and the inner side 8b can be made different depending on the surface of the workpiece. Reference numeral 9 denotes a workpiece, and although it is a flat plate, the base 10 of the suction body 1 can be made into any shape such as concave, convex, square, or round.

In such a configuration, the action is to move the suction conveyance device onto the workpiece 9 formed by the molding machine and to place the suction body 1 on top of the workpiece 9 formed by the molding machine.
The base 10 of the machine is brought to rest smoothly and accurately, and the arm (not shown) that holds the head cover 5 or the base plate 6 is gently lowered. Then, the base plate 6 loads the spring 7 due to its own weight and presses the workpiece 9 together with the base 10 of the suction body 1 and the pad 8. The base plate 6 is capable of adjusting the load that does not cause damage to the workpiece 9 depending on the type of workpiece 9, taking into account the respective weights of the suction body 1, bat 8, head cover 5, and spring 7.

When the workpiece 9 and the pad 8 are brought into close contact with each other, the air and fluid existing between the space 11, the ring groove 3 and the pore 2 are sucked and discharged by the vacuum pump, so that no air and fluid exists between the spaces 11 and 2, and the air and the fluid between the workpieces 9 are removed. A vacuum portion is generated in , and the workpiece 9 is attracted to the pad 8 of the base 1o of the attraction body 1. Moreover, the pressure applied to the workpiece 9 is the own weight of the adsorbent and its accessories,
Only the weight of the booth plate 6 can be adjusted to this.

Problems to be Solved by the Invention When a plurality of workpieces are attracted by a vacuum suction device, a suction port that is not closed by the workpieces occurs due to differences in the shape, size, and alignment of the suction parts, and air leaks from this suction port. This causes the adsorption force to decrease.

To prevent this, (1) Use a powerful vacuum pump to improve the suction capacity of the entire device.

(2) Mask the suction port that will not be closed with tape, sheet, etc.

(3) A pad that matches the shape of the suction part is provided at the suction port to improve suction ability.

(4) Each suction port is controlled independently by a sensor and a solenoid valve, and only the closed suction port is operated for suction.

There is.

However, method (1) requires a new powerful vacuum pump in addition to the existing vacuum pump in the factory, method (2) adds masking work and complicates the process, and method (3) In method (4), the entire device becomes large and is ineffective. There was a problem in that the control was also complicated.

An object of the present invention is to provide a vacuum suction device that solves the above-mentioned conventional problems.

Means for Solving the Problems The present invention provides a vacuum suction device which has a plurality of suction ports and which is connected to an exhaust means by communicating through a communication path from the suction ports to the suction port. It has an elastic plate,
A valve chamber is provided in the communication passage, a valve seat is provided on the suction port side of the valve chamber, and a valve body is built in the valve seat.

Function: If the suction port is not closed by the workpiece, the valve body is sucked up and closes the suction port, so the suction capacity does not decrease.

Further, when the suction port is closed by a workpiece, the valve body opens the suction port, and the valve body is in a free state and the suction port has suction ability.

Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a vertical cross-sectional view of main parts of the vacuum suction device of the present invention, and FIG.
The figure is a plan view showing the back side of FIG. 1.

In the figure, 12 is a flat plate pedestal, 13 is an intermediate plate, and 14 is an elastic plate (pad) such as a sponge.The flat plate pedestal 12.
Assemble the intermediate plate 131 and the elastic plate 14. A suction port 18 is provided on the flat plate pedestal 12, and the suction port 18 is connected to a manifold 21 and connected to a vacuum pump (not shown) via an exhaust path. The end of the suction port 18 is connected to the valve seat edge 16 , and a backing 22 is attached to the valve seat edge 16 , and the valve seat edge 16 is connected to the valve chamber 17 . Inside the valve chamber 17 is a valve 1 made of a polyamide sphere (e.g. iron ball).
5 is built-in. A hole 20 is provided in the intermediate plate 12, and a suction hole 19 is provided in the elastic plate 14. Valve chamber 17. Suction 018
．． A plurality of suction holes 19 and holes 20 are arranged in a matrix shape at equal intervals vertically and horizontally on a plane, for example, at a pitch of 5 squares. Also,
Valve chamber 17. Suction 018. Adsorption hole 19. The diameters of the holes 20 are, for example, φ3.5 mm, φ2.3 am, and φ3.
,2+1111. It is set to φ2.31. Furthermore, the valve body 15
For example, the nylon ball has a diameter of φ3.2+11111. However, it goes without saying that the dimensions of the above-mentioned parts are set according to the dimensions, shape, etc. of the workpiece to be sucked.

Next, the operation of the present invention will be explained. When the suction surface of the workpiece is brought into contact with the suction port 19, the elastic plate 14 absorbs the unevenness of the suction surface, and the suction surface of the workpiece and the elastic plate 14 are in complete contact with each other. Here, when the vacuum pump causes an evacuation action, the air inside the hole 20 and the valve chamber 17 is sucked, and the valve body 1
5 is in a free state (slightly floating) and the suction port 19 suctions the workpiece.

Next, if there is no workpiece under the suction port 19 or if the workpiece is only half full, that is, the suction port 19
is not closed by the work, when the vacuum pump generates an evacuation action, the valve body 15 is sucked up to the valve seat edge 16 side of the valve chamber 17 and comes into contact with the backing 22 on the valve seat edge 16, sealing the suction 018. Therefore, the suction ability does not decrease.

Since the suction ports are arranged in a matrix at equal intervals vertically and horizontally on a plane, they can be of various shapes and sizes.

Workpieces can also be attracted to the suction portions of aligned workpieces.

Details of the invention The present invention as described has the following effects.

(1) Workpiece suction power can be obtained using a normal vacuum pump without using a powerful vacuum pump.

(2) There is no need to mask the suction port that will not be closed with tape, sheets, etc.

(3) Suction is possible regardless of the shape or size of the suction part of the workpiece, and even if the workpiece is not aligned, so there is no need to replace the pad depending on the workpiece.

(4) Only one solenoid valve is needed for 0N10FF of the vacuum pump.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of main parts of the vacuum suction device of the present invention, and FIG.
The figure is a plan view showing the back side of FIG. 1, and FIG. 3 is a longitudinal cross-sectional view of the main part of a conventional vacuum suction device. 12 flat plate pedestal, 13... intermediate plate, 14... elastic plate,
15... Valve body, 18... Suction port, 19... Suction port, 20... Hole.

Claims (3)

[Claims] (1) A vacuum suction device having a plurality of suction ports, in which the suction ports and the suction port are connected to exhaust means through a communication path, and an elastic plate is provided on the suction surface of the workpiece, and A vacuum suction device comprising: a valve chamber provided in a communication passage; a valve seat provided on a suction port side within the valve chamber; and a valve body built into the valve chamber. (2) The vacuum suction device according to claim 1, wherein the elastic plate is a sponge sheet. (3) The vacuum suction device according to claim 1, wherein the valve body is a sphere made of polyamide resin.