JPH01242345A - Vacuum suction device - Google Patents

Abstract

PURPOSE:To eliminate bothering work for replacing suction pad and increase the versatility by furnishing a number of vacuum suction elements, and by allowing the valve part to block the draft gap of a through hole, with which substance to be attracted is not in contact. CONSTITUTION:In the condition that inside pressure of a vacuum chamber 1 is atmospheric, substance to be attracted 11 is in contact with the undersurface of a resilient plate 5, and accordingly the valve part 10 protruding down from a through hole 6 moves up and is positioned within this through hole 6, and in this condition, inside the vacuum chamber 1 forms a vacuum. As the through hole 6 with which the substance 11 is in contact is in communication with the vacuum chamber 1 through the draft gap and will form a vacuum, while the through hole 6 with which no substance 11 is in contact is blocked with the valve part 10 by vacuum suction at its draft gap in a communication hole 4. Consequently the degree of vacuum inside the chamber 1 is retained, and strong suction and retention is accomplished regardless of the shape of the substance 11. This eliminates bothering work for replacing suction pad and increases the versatility.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an apparatus for vacuum suctioning a plate-shaped material or the like.

[Prior Art and its Problems] Vacuum suction devices have been used in the past, for example, in furniture factories, etc., to vacuum suction plate materials from the top of a conveyor and transfer them to other places. However, conventionally used vacuum suction devices have to attach and replace a plurality of vacuum suction batts according to the shape of the material to be adsorbed, and cannot necessarily adsorb objects of any shape. In other words, when the shape of the adsorbed material changes, the vacuum adsorption force from other bats decreases because the bats that are not adsorbed to the adsorbed material directly suck in the outside air from among the many vacuum suction batts, making it impossible to adsorb the object. For this reason, in the past, the attachment of the butt was changed according to the shape of the adsorbed material, but changing the attachment is troublesome and cannot be applied when there are many different shapes of the adsorbed material. There was a moment when I was thinking.

[Means for Solving the Problems] The present invention attempts to solve the above problems by forming a vacuum chamber connected to a vacuum pump, and forming a vacuum chamber connected to a vacuum pump, and forming a vacuum chamber connected to a flat bottom wall of the vacuum chamber at a predetermined interval. A large number of ventilation holes are formed, and a rubber elastic plate with holes larger in diameter than the ventilation holes is attached to the lower surface of the bottom wall so that the holes match the ventilation holes, and ventilation gaps are formed around the outer periphery. As shown in the figure, the hanging shaft penetrating the ventilation hole so as to be vertically movable has a head having a diameter larger than that of the ventilation hole at its upper end, and a valve portion capable of closing the ventilation gap at its lower end. The vacuum suction device is characterized in that the valve portion is configured to move downwardly from the extraction hole by vertical movement of the hanging shaft.

[Operation] When the vacuum chamber is at atmospheric pressure, the material to be adsorbed is brought into contact with the lower surface of the elastic plate, and the valve part protruding from the extraction hole is moved upward by the contact and positioned in the extraction hole, and the material is kept in that state. Make a vacuum inside the vacuum chamber. In this case, the hole that is in contact with the adsorbed material will be in a vacuum because it will communicate with the vacuum chamber through the ventilation gap.

In the case of an open-hole valve body that is not in contact with the adsorbed material, the ventilation gap of the ventilation hole is closed by the vacuum suction.

[Example] Next, an example of the vacuum suction device of the present invention will be described with reference to the drawings.6 In the drawing, 1 is a rectangular shallow box-shaped vacuum chamber made of steel plate.

2.2 is a flexible hose connecting the vacuum chamber and a vacuum pump (not shown). a flat bottom wall 3 of the vacuum chamber 1;
A large number of ventilation holes 4 are formed at predetermined intervals. Incidentally, the ventilation hole 4 is a circular hole with a diameter of 6.5 m. Reference numeral 5 denotes a rubber elastic plate attached to the lower surface of the bottom wall 3, and the elastic plate 5 has circular holes 6 that match the respective ventilation holes 4 and have a larger diameter (20 m in diameter) than the ventilation holes 4. has been established. Reference numeral 7 denotes a hanging shaft made of plastic with a head 8 larger than the ventilation hole 4 screwed onto its upper end. It is inserted freely. A valve portion 10 in the shape of an inverted truncated cone is integrally formed, and the valve portion lO normally projects downward from the extraction hole 6.

In the vacuum suction bag constructed in this manner, by bringing the vacuum chamber 1 into atmospheric pressure and bringing the adsorbed material 11 into contact with the lower surface of the elastic plate 5, the hanging shaft 7 is lifted as shown in FIG. The part 10 is accommodated in the extraction hole 6. In this state, vacuum chamber 1
When the vent hole 6 is connected to a vacuum pump and evacuated, the air in the vent hole 6 passes through the ventilation gap 9 and is sucked into the vacuum chamber l.
Since the pressure inside is negative, the material 11 to be adsorbed can be adsorbed to the lower surface of the elastic plate 5. At that time, as shown on the left side of FIG.
The vacuum suction force overcomes the weight of the hanging shaft 7 and lifts it upward, and the valve part 10 joins the ventilation hole 4 and closes the ventilation gap 9. Therefore, the intrusion of outside air through the ventilation hole 4 is prevented, and the pressure inside the vacuum chamber 1 can be kept low.The degree of vacuum in the two vent holes 6 on the right side in FIG. It can strongly adsorb and hold. In this case, the adsorbed material 1
1, the pressure inside the extraction hole 6 will drop as well as in the vacuum chamber 1, so the hanging shaft 7 will not move further upward from the state shown in FIG. The adsorption can be canceled by returning the atmospheric pressure to 1.

[Effects of the Invention] As described above with respect to the embodiments, the vacuum suction device of the present invention is provided with a large number of vacuum suction elements, and the ventilation gap is closed by the valve portion for the extraction hole that does not come into contact with the adsorbed material. As a result, the degree of vacuum in the vacuum chamber is maintained, and the material to be adsorbed can be strongly attracted and held regardless of its shape. This eliminates the hassle of attaching and replacing suction bats, and at the same time has the advantage of increasing its versatility.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a bottom view, FIG. 3 is a partially enlarged vertical sectional view of FIG. 1, and FIG. FIG. 5 is a partially enlarged view of FIG. 3. l...Vacuum chamber, 3...Bottom wall, 4...Vent hole, 5...Elastic plate, 6...Extraction hole, 7...Descent shaft, 8... ...Head, 9...Ventilation gap, 10...
・Valve part, 11...adsorbed material

Claims (1)

[Claims] A vacuum chamber connected to a vacuum pump is formed, a number of ventilation holes are opened at predetermined intervals on the flat bottom wall of the vacuum chamber, and a hole with a larger diameter than the ventilation holes is opened on the lower surface of the bottom wall. An elastic plate made of rubber is pasted so that the cutout hole matches each of the ventilation holes, and a hanging shaft is inserted into the ventilation hole so that it can move up and down so that there is a ventilation gap on the outer periphery. A head having a larger diameter than the ventilation hole is formed, and a valve portion capable of closing the ventilation gap is formed at the lower end, and the valve portion is configured to move downward and retract from the extraction hole by vertical movement of the hanging shaft. A vacuum suction device characterized by: