JPS6125962Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement in a vacuum suction table of this invention, with a pipe line switching valve for the suction table disposed between the pipes connecting the table and the blower.

With a vacuum suction table, the suction force is released when changing the workpiece, but in conventional equipment, the 8th suction table is used for this purpose.
An adsorption release valve 1 as shown in the figure is provided in the middle of the pipe line 2. That is, a vent hole 4 communicating with the pipe line 2 is formed in the lower surface of the valve box 3, and this vent hole 4 is opened and closed by a valve body 6 that is raised and lowered by an air cylinder 5. A plurality of pores 7 are provided. When replacing the workpiece, the blower (not shown) is stopped, and at the same time the valve body 6 is actuated by the air cylinder 5.
open. Due to the opening of the ventilation hole 4, the vacuum chamber of the suction table (both not shown) is communicated with the outside air and the suction force is lost, so that the workpiece can be easily replaced. However, as is clear from the above description, this device has the drawback that the blower must be stopped and started each time the workpiece is replaced.

This invention is a switching valve proposed to eliminate the above-mentioned drawbacks, and the purpose is to enable the workpiece to be easily replaced without stopping the blower, and is constructed as follows. An on-off valve is installed between the pipe line connecting the suction table and the blower to open and close the pipe line by rotation around a rotation axis, and an outside air intake port is provided on the suction table side and the blower side of the on-off valve. An opening/closing shutter that opens and closes by rotation is provided at the outside air intake port, and the center of rotation of the opening/closing shutter is fixed to one end of the rotating shaft of the opening/closing valve, so that when the opening/closing valve closes the pipe line, the opening/closing shutter opens and closes both outside air intake ports. This is a pipe switching valve for a suction table that opens.

An embodiment embodying the above configuration will be described below with reference to the drawings. Reference numeral 11 denotes a suction table having a vacuum chamber 12 therein, and a plurality of suction holes 13 through which the vacuum chamber 12 passes are bored on the surface of the table 11. The suction table 11 is slidably disposed on the bed 14 via a rail 15, and a conduit 17 leading from the vacuum chamber 12 to a blower 16 is provided. 18 is blower 1
This dust collector removes impurities such as wood chips from the air entering 6, and is equipped with a cloth bag filter 19 that allows only air to pass through and collects impurities. A pipe line switching valve 20 according to this invention is installed in the middle of the pipe line 17. Reference numeral 21 denotes a cylindrical main body, with pipes 171 and 1 connecting the suction table 11 and the blower 16 at both ends thereof.
Connected to the inner end of 72. An on-off valve 23 for opening and closing the channel 22 of the main body 21 is provided inside the main body 21 .
The on-off valve 23 is a disc that rotates in the left-right direction around a rotating shaft 24 provided in the diametrical direction, and the upper and lower ends of the rotating shaft 24 are rotatably fixed to the upper and lower walls of the main body 21. An outside air intake port 25 is provided on the upper surface of the main body 21 and on the suction table 11 side and the blower 16 side of the on-off valve 23.
Open 1,252 and install both outside air intake ports 25 above it.
An on-off valve shutter 26 for opening and closing the valve 1,252 is provided. The opening/closing shutter 26 is made up of two discs 261, 26.
1 are connected to each other, and its rotation center 27 is fixed to the upper end of the rotation shaft 24 of the on-off valve 23. When the on-off valve 23 closes the flow path 22, the on-off shutter 26 opens both outside air intake ports 25.
1,252 Install by opening. Reference numeral 28 denotes a rotating cylinder, and the tip of its rod 29 is pivotally attached 30 to one side of the opening/closing shutter 26.
The opening/closing shutter 26 including the opening/closing valve 23 moves forward and backward.
Rotate in the direction of the arrow.

Next, the operation of the above device will be explained. To replace the finished workpiece, use the cylinder 28.
, extend the rod 29 and close the opening/closing shutter 2.
6 and the on-off valve 23 clockwise. Due to the rotation of both, the on-off valve 23 closes the flow path 22, and the on-off shutter 26 opens the outside air intake ports 251, 252.
When the flow path 22 is closed, the vacuum chamber 1 is opened by the blower 16.
The suction action to 2 is cut off, and the outside air intake port 25
1, the vacuum chamber 12 communicates with the outside air and air flows in, so that the suction force disappears and the workpiece is easily removed from the suction table 11. Further, the blower 16 sucks atmospheric air through the opening of the outside air intake port 252. Therefore, even if the pipe line 17 is closed, the blower 16
can continue to rotate without burning out.
To fix the next workpiece to the suction table 11, press the rod 281 of the cylinder 28 in the opposite direction from when it was released.
, and turn the opening/closing shutter 26 and the opening/closing valve 23 counterclockwise. Due to the rotation of both, the on-off valve 2
3 opens the flow path 22 and at the same time closes the outside air intake ports 251 and 252 by the opening/closing shutter 26. Channel 2
2 opens, the vacuum chamber 12 becomes vacuum again due to the suction action of the blower 16, and the workpiece is sucked toward the table side by its suction force, and is fixed therein. The outside air intake ports 251 and 252 are closed by the opening/closing shutter 26, and the air no longer flows into the pipe line 17, so that the degree of vacuum in the vacuum chamber 12 rapidly increases.

As explained above, this device is provided with an on-off valve that opens and closes the pipe between the suction table and the blower, and an on-off shutter that operates integrally with the on-off valve. When the valve is closed, the opening/closing shutter closes the outside air intake ports provided on the suction table side and the blower side of the opening/closing valve, so that the blower is automatically communicated with the atmosphere at the same time as the pipe is closed. This eliminates the drawback of conventional equipment, such as having to stop the blower when replacing workpieces. Furthermore, since the vacuum chamber was also automatically communicated with the atmosphere at the same time, the suction force on the workpiece could be quickly reduced to zero.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a suction table and a blower on which the pipe switching valve of this invention is arranged, Fig. 2 is a perspective view showing the pipe switching valve with the pipe opened, and Fig. 3 is a longitudinal sectional view of the same. FIG. 4 is a plan view of the same, FIG. 5 is a perspective view showing the pipe switching valve with the pipe closed, and FIG. 6 is a longitudinal sectional view of the same,
FIG. 7 is a plan view of the same, and FIG. 8 is a longitudinal sectional view showing a conventional adsorption release valve. 11...Suction table, 16...Blower, 17
... Pipeline, 20 ... Pipe switching valve, 21 ... Writing style,
23...Opening/closing valve, 251, 252...Outside air intake port, 26...Opening/closing shutter, 27...Rotation center.

Claims (1)

[Scope of utility model registration request] An on-off valve that opens and closes the pipe by rotation is installed in the middle of the pipe connecting the suction table and the blower, and an outside air inlet is provided on the suction table side and the blower side of the on-off valve. A suction table provided with an opening/closing shutter that opens and closes, the center of rotation of the opening/closing shutter being fixed to one end of the rotating shaft of the opening/closing valve, so that when the opening/closing valve closes a pipe line, the opening/closing shutter opens both outside air intake ports. Pipe switching valve.