JPS5813314B2 - fluid delivery device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention, when releasing the vacuum using a vacuum suction gripping device, temporarily supplies high-pressure air into the suction pad to quickly break the vacuum state and remove the adhered object. This relates to a fluid feeding device suitable for use in cases where removal is facilitated, etc.
In particular, the amount of fluid to be fed can be easily adjusted as necessary depending on the size of the suction pad.

The details of the present invention will be described below with reference to the illustrated embodiments.
1 is the main body, 2 is the valve chamber, 3 is the valve seat, 4 is the compressed air introduction hole provided at the opposite end of the valve seat 3, 5 is the outlet, 6 is the valve body,
An appropriate flow gap a is provided between the valve body 6 and the valve chamber or by a vent hole or groove provided around the valve body.

The above-mentioned communication groove may be provided in the inner wall of the valve chamber in the longitudinal direction, or a small communication hole may be provided in the valve body flange.

A piston 7 is slidably fitted in a separate chamber 8 connected to the valve chamber 2, and the valve body 6 is connected to the piston 7 by a connecting rod 9.
is connected to.

A flow rate control device 10 is fixedly installed in the separate room 8, and this separate room is divided into two compartments A and B.

This flow rate control device 10 is composed of an outer cylinder 11 and a check valve 12 loosely fitted into the outer cylinder 11 and urged by a spring 15.
A regulating valve 13 is screwed into the inner hole of the check valve 12 .

14 is a spring receiver; 17 is a through hole provided in the spring receiver 14; 18 is a through hole provided in the spring receiver 14;
indicates the packing.

The regulating valve 13 has a threaded portion 13a screwed into the check valve 12, a throttle portion 13c having a fluid introduction screw groove 13b provided at the tip of the threaded portion 13a, and a rotation shaft 13d formed on the other side of the threaded portion 13a. The throttle part 13c is slidably fitted into the inner hole 16 of the check valve 12, and the threaded part 13a has a flow groove 1 whose end communicates with the fluid introduction screw groove 13b.
3e is formed.

The rotation shaft 13d protrudes to the outside through a stopper 19 screwed onto the end surface of the main body 1, and a notch 20 is carved on the circumferential surface of the outer end thereof, as is clear with reference to FIG. Shita knob 21
is provided.

A detent pawl 22 is engaged with this notch 20.

The claw 22 is made of an elastic material and is wound around a shaft 23 attached to the main body 1.

Note that 24 is packing.

Therefore, in the flow rate control device 10, when the pressure in the compartment A increases, the check valve 12 moves to the left against the spring 15 due to air pressure, and the air flow passes through the gap between the outer cylinder 11 and the check valve 12 and enters the compartment. It quickly flows into B and presses the piston 7 to move it to the left.

The right edge of the piston 7 is the flange portion 12a of the check valve 12.
is pressed against the stepped portion 11a of the outer cylinder 11 via the packing 18 to stop the flow between them, and the air flow is discharged to the compartment A while the discharge speed is controlled by the regulating valve 13 installed in the inner hole of the check valve 12. It is now possible to do so.

25 is a compressed air supply port provided at one end of the main body 1;
5 is a valve chamber 27a of an on-off valve 27 operated by a solenoid 26;
One outlet of this valve chamber 27a communicates with the inlet 4 of the valve chamber 2, and the other outlet branches, and one is connected to the nozzle of the air ejector pump 30 via the air supply port 28 and the air supply pipe 29. 31, and opens into the atmosphere through an ejector hole 32 and a silencer 33, which are arranged opposite to the nozzle 31, and the nozzle 31
The suction chamber 34 between the and ejector hole 32 is connected to the suction pad 36 of the gripping device via the suction pipe 35.
5 is connected to the outlet port 5 of the valve chamber 2 through a pipe 37.

The branch air outlet 38 on the opposite side of the air outlet 28 is connected to the air pipe 3.
It communicates with the compartment A of the separate room 8 via 9.

Note that 26a indicates a spring for returning the solenoid 26.

Next, to explain the operation of the device of the present invention, the supply port 25
is connected to a compressor to supply compressed air, the solenoid 26 is operated, and the on-off valve 27 opens the valve chamber 2 as shown in the figure.
If the inlet hole 4 is closed and the passage on the side of the air supply port 28.
1 toward the ejector hole 32, creates a negative pressure in the suction pad 36 through the suction chamber 34 and the suction pipe 35, and suctions the adhered object b, so that operations such as movement can be performed using a gripping device. .

At the same time, high-pressure air is also sent to compartment B via the air supply port 38, air supply pipe 39, and compartment A, so the piston 7 quickly moves to the left and presses against the packing 8' of the separate compartment 8 step. The valve body 6 is separated from the valve seat 3 and held in a predetermined position.

Further, the inside of the valve chamber 2 is maintained at a negative pressure via the pipe 37 and the outlet 5.After the operation by the gripping device is completed, if the solenoid 26 is switched off, the on-off valve 27 is returned by the spring 26a and the air outlet Since the 28 and 38 side passages are closed and the introduction hole 4 of the valve chamber 2 is opened, the suction operation of the air ejector pump 30 is stopped, and at the same time compressed air is introduced into the valve chamber 2 and presses the valve body 6. The piston 7 connected to the valve body 6 is connected to the compartment B.
In order to move the air while being controlled and discharged by the flow rate control device 10, it moves to the right at an appropriate speed and presses against the valve seat 3, thereby blocking the outflow of the compressed air.

However, during this time, the compressed air that has passed through the circulation gap a flows into the suction pad 32 through the outlet 5, so the vacuum state is rapidly destroyed, and the removal of the adhered object b becomes extremely quick and easy, significantly increasing work efficiency. be able to.

At this time, the ejection time of the compressed air is determined by the piston 7 in the compartment B.
can be easily adjusted by adjusting the gas discharge rate.

In other words, the need to control the rate of gas discharge from compartment B to compartment A is due to the fact that the size of the suction surface of suction pad 36 is changed depending on the weight of adherend object b. This is because the amount of gas fed required to break the vacuum state changes.

In other words, if the required volume of the suction pad 36 is large, the amount of gas required to break the vacuum will be large, so in order to slow down the rightward movement speed of the piston, the speed of gas discharge from compartment B to A may be reduced. Need to slow down.

On the other hand, when the required volume of the suction pad 36 is small, the amount of gas required to break the vacuum is small, so it is necessary to increase the gas discharge speed from the floor B to the floor A in order to increase the rightward movement speed of the piston 7.

If the amount of gas discharged to compartment A is small, twist the knob 21 to remove the throttle part 1 fitted into the inner hole of the check valve 12.
3c to the right and shorten the length of the fluid introduction screw groove 13b that fits into the inner hole of the check valve 12.

If the length of the fluid introduction screw groove 13b that fits into the inner hole of the check valve 12 is shortened, the resistance of the gas flowing from the compartment B to the compartment A will be reduced, so that the clockwise speed of the piston 7 will be reduced. becomes faster, and as a result, the amount of gas flowing out to the outlet 5 is relatively reduced.

On the other hand, to increase the amount of gas supplied to the pad 36,
The throttle portion 13c may be pushed into the inner hole 16 of the check valve by twisting the knob 21.

Next, in order to perform suction operation from this state, solenoid 2
When the switch 6 is turned on, the introduction hole 4 to the valve chamber 2 is closed by the on-off valve 27 in the same way as described above, and the passage on the side of the air supply ports 28 and 38 is opened, so the ejector pump 30 is operated again and the suction pad 36 is negative. At the same time, the piston 7 moves to the left due to the compressed air sent into the compartment B, and the valve body 6 is moved into the valve chamber 2.
The valve chamber 2 is pulled away from the valve seat 3 and returned to its original position against the high pressure air trapped inside, thereby maintaining the inside of the valve chamber 2 at negative pressure.

In this case, it is also possible to open the compartment A to the atmosphere and move the piston 7 to the left only by the negative pressure in the left chamber.

Further, the moving speed of the valve body 6 when introducing fluid into the valve chamber 2 may be adjusted using a compression spring or the like.

As described above, according to the present invention, the fluid feeding device is provided with a flow rate control device that moves the valve body at a predetermined speed at a position dividing a separate chamber communicating with the valve chamber into two, and the flow rate control device has a regulating valve provided on a moving check valve,
A rotating shaft protruding from the outside of the main body is provided at the end of the regulating valve, and the flow rate flowing from one of the left and right compartments of the separate chamber to the other is controlled by rotation of the rotating shaft. Therefore, the amount of fluid fed can be freely and quickly adjusted and controlled from the outside, which is extremely convenient.

In addition, a fluid introduction screw groove 13b is provided in the throttle portion 13c of the regulating valve 13 that is slidably fitted into the inner hole of the check valve 12, and the flow rate can be adjusted by moving the throttle portion 13c in and out. Adjustment is much easier than with needle valves, etc.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the apparatus of the present invention, and FIG. 2 is a sectional view taken along the line X--X in FIG. In the figure, 1... Main body, 2... Valve chamber, 3...
...Valve seat, 4...Fluid introduction hole, 5...
...Outlet port, 6...Valve body, 7...Piston, 8...Separate chamber, A, B...Separate chamber, 9... ... Connection rod, 10 ... Flow rate control device, 11 ... Outer cylinder, 12 ... Check valve,
13...Adjustment valve, 13d... Rotation shaft,
21...Knob, 25...Compressed air supply port, 26...Solenoid, 27...
Opening/closing valve, 30... Ejector pump, 36...
...Suction pad.

Claims (1)

[Claims] 1. A valve body is fitted into a valve chamber whose one end communicates with a fluid supply port and the other end communicates with a supply port through a valve seat, and the fluid introduced into the valve chamber In the fluid feeding device, the introduced fluid is fed to the feeding chamber through the flow gap of the valve disk while the valve disk moves at a predetermined speed and seats on the valve seat. A flow rate control device is provided at a position that divides a separate chamber connected to the valve chamber into two, and a piston connected to the valve body is fitted in one of the chambers, and the flow rate control device controls the flow rate of the moving check valve. It has a regulating valve provided in the inner hole, and a rotating shaft is provided at the end of the regulating valve that protrudes to the outside of the main body, and rotation of the rotating shaft causes movement from one compartment to the other of the above-mentioned separate chambers. A fluid feeding device characterized in that the amount of fluid flowing through the valve body is adjusted to move the valve body at a predetermined speed. 2. The fluid feeding device according to claim 1, wherein a fluid introduction screw groove is provided in a throttle portion in which the regulating valve is slidably fitted into an inner hole of the check valve.