JPH0367831A - Vacuum adsorption transfer device - Google Patents

Abstract

PURPOSE:To shorten substantially an adsorbing time and reduce a pneumatic power loss by interposing a first electromagnetic valve for opening and closing a pipe line between an end of a flexible pipe and an adsorbing pad. CONSTITUTION:An adsorbing pad 6 is applied to an article 8 to be transferred while a first electromagnetic valve 1 is closed. When the first electromagnetic valve 1 is opened thereafter, since the interior of a flexible pipe 5 is previously vacuumized, only an extremely slight amount of the atmospheric air in the adsorbing pad 6 is expelled to the vacuum supply source 3 side to adsorb the article 8 to be transferred so that the adsorbing time is substantially shortened. After the completion of the transfer, when the first electromagnetic valve is closed, the adsorbing pad 6 is shut off from the vacuum supply source 3, and an adsorbing force is eliminated by the intrusion of the atmospheric air from a contact gap between the adsorbing pad 6 and the article 8 to be transferred and the article 8's own weight to complete the transfer.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention attaches a suction pad to the tip of a flexible tube connected to a vacuum supply source to suction an object to be conveyed, and the suction pad is moved to a desired position. The present invention relates to a vacuum suction conveyance device that conveys an object by moving it to a certain position.

(1) [Prior Art] Fig. 4 is a front view of a conventional example, in which a first pipe is connected to a pipe 4 connected to the suction port of a vacuum pump 3 with a high degree of vacuum such as a vortex blower. The solenoid valve 1 is connected to a second solenoid valve 2 that opens and closes the pipe line to the atmosphere.

Instead of the vacuum pump 3, there is also one in which the pipe 4 is connected to a vacuum supply source piped to a factory or the like.

A flexible tube 5 such as a flexible hose connected to the tube 4
A suction pad 6 made of rubber or the like with a flexible periphery is attached to the tip of the suction pad 6, which suctions the conveyed object 8 placed on a table 7a of a conveyor, etc., and uses an operation tool (not shown) to The suction pad 6 is moved as in operation M to transport the object 8 from the platform 7a to the platform 7b.

As is well known, the relationship between conveyance and the operation of the solenoid valves 1 and 2 is such that the suction pad 6 is first placed on the conveyed object 8 on the stand 7a.
When approaching, the first solenoid valve 1 is closed and the second solenoid valve 2 is opened to bring the flexible tube 5 to atmospheric pressure. If the vacuum is transmitted and the conveyed object 8 is approached while sucking air from the suction pad 6, the conveyed object (2) will be sucked up by the suction air flow and the conveyed object 8 will be sucked up by the suction pad 6.
This is because they are not reliably adsorbed.

As soon as the suction pad 6 hits the conveyed object 8, the first solenoid valve 1 is opened, the second solenoid valve 2 is closed, and the suction pressure of the vacuum pump 3 is transmitted to the flexible tube 5, and the suction pad 6 and the conveyed object are separated. A vacuum is created between the object 8 and the surface, and the object 8 is attracted by the pressure difference with the atmosphere.

When the suction pad 6 that has suctioned the conveyed object 8 in operation M completes its movement to the stand 7b, open and close the valve to bring the flexible tube 5 to atmospheric pressure, release the suction force, and move the suction pad 6 to remove the conveyed object. Thing 8
is placed on the stand 7b to complete the conveyance.

[Problem to be solved by the invention]

In the conventional technique described above, the flexible tube 5 is kept under atmospheric pressure until the suction pad 6 approaches the conveyed object 8 on the table 7a.
Vacuum pressure is transmitted to the suction pad by opening and closing the valve after the approach is complete and the vacuum pump 1
It takes a considerable amount of time and labor to reach a sufficient degree of vacuum to enable suction by discharging to the side, and there is also a power loss (3) of the vacuum pump 1 during this time. The situation is similar when releasing the suction pad on table 7b.

An object of the present invention is to provide a vacuum suction conveyance device that can shorten wasted suction time from the start of suction to the completion of suction, and can also reduce power loss.

[Means to solve the problem]

The vacuum suction conveyance device of Invention 1 includes: attaching a suction pad to the tip of a flexible tube connected to a vacuum supply source to suction an object to be conveyed; and moving the suction pad to a desired position to convey the object. In the vacuum suction conveyance device, a first electromagnetic valve for opening and closing a conduit is interposed between the tip of the flexible tube and the suction pad.

The vacuum suction conveyance device of invention 2 is characterized in that, in invention 1, there is provided a second solenoid valve that opens and closes the pipe line to the atmosphere between the first electromagnetic valve and the suction pad.
A solenoid valve is installed.

[Effect]

In invention 1, if the suction pad is applied to the conveyed object with the first solenoid valve closed and the first solenoid valve is opened after the suction pad hits the object, the inside of the flexible tube is already evacuated (4). Only a very small amount of the atmosphere inside the suction pad is exhausted to the vacuum source side, and the suction time is significantly shortened.

When the conveyance is completed, the first solenoid valve is closed, and the suction pad is cut off from the vacuum source, and the suction force is increased by the infiltration of air through the contact gap between the suction pad and the object and the weight of the object. and completes the transport.

Therefore, although this invention shortens the suction time, it is difficult to use it for objects with smooth surfaces. However, it can be used if the suction pad is provided with small holes or slits, and the suction of atmospheric air during suction must be allowed.

In invention 2, in addition to the effect of invention 1, when the first solenoid valve is closed to complete the conveyance, if the second solenoid valve is opened, the suction pad immediately becomes atmospheric pressure and loses its suction force. The adsorption completion time is also faster.

〔Example〕

1 is a front view of the first embodiment, FIG. 2 is a sectional view of the suction pad (5) in FIG. 1, and FIG. 3 is a sectional view of the second embodiment. Components given the same reference numerals in the conventional example and in each figure have roughly the same functions.

1 and 2 relate to invention 2, in which a first electromagnetic valve l is installed at the tip of a flexible tube 5 directly connected to the suction port of the vacuum pump 3.
, the second electromagnetic valve 2, and the suction pad 6 are directly connected in this order.

A first electromagnetic valve 1 is connected to a flexible tube 5 in a T-joint 11 screwed into a mandrel 68 embedded in the non-adsorption side of the suction pad 6.
The second solenoid valves 2 are connected to communicate with the atmosphere A, respectively.

The space 12, where the pressure changes with the opening and closing of both electromagnetic valves, does not have the flexible tube 5 as in the conventional example and is an extremely narrow space. Completion time is significantly reduced, and the loss of air power is also significant.

Since the first solenoid valve and the second solenoid valve operate in opposite directions, it is preferable to use an integrated three-port solenoid valve.

Embodiment 2 shown in FIG. 3 relates to invention 1, in which (6) the first electromagnetic valve 1 is directly connected to the mandrel 6a of the suction pad 6 without the second electromagnetic valve. For example, if the suction pad 6 is provided with a small hole 6b, the air power loss will increase somewhat, but the suction completion time will be shortened.

〔Effect of the invention〕

The vacuum suction conveyance device of this invention group attaches a suction pad to the tip of a flexible tube connected to a vacuum supply source to attract an object to be conveyed, and moves the suction pad to a desired position to convey the object. In the vacuum suction conveyance device, a first solenoid valve for opening and closing the pipe is interposed between the tip of the flexible tube and the suction pad, so that when the first solenoid valve is closed, Since the vacuum pressure of the vacuum supply source exists in contact with the first solenoid valve, the suction time when the valve is opened and suction is greatly shortened, and air power loss is also reduced. This has the effect of contributing to reducing process time.

Invention 2, which includes the addition of the second solenoid valve, has the effect of shortening the suction completion time.

(7)

[Brief explanation of drawings]

1 is a front view of the first embodiment, FIG. 2 is a sectional view of the suction pad of FIG. 1, FIG. 3 is a sectional view of the second embodiment, and FIG. 4 is a front view of the conventional example. 1... First solenoid valve, 2... Second solenoid valve, 3...
・Vacuum pump, 4... tube, 5... flexible tube, 6...
Suction pad, 6b...small hole, 7a, 7b...stand, 8
...Transported object, 12° (8)

Claims (1)

[Scope of Claims] 1) A vacuum that attaches a suction pad to the tip of a flexible tube connected to a vacuum supply source to attract an object to be transported, and moves the suction pad to a desired position to transport the object. A vacuum suction conveyance device, characterized in that a first electromagnetic valve for opening and closing a conduit is interposed between the tip of the flexible tube and the suction pad. 2) In the vacuum suction conveyance device according to claim 1, a second valve is provided between the first electromagnetic valve and the suction pad to open and close the pipe line to the atmosphere.
A vacuum suction conveyance device characterized by being equipped with a solenoid valve.