JP2001170834A - Drain device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent refuse clogging with a conventional drain device using a check valve with a ball and to prevent frequent abnormal stoppage of a machine. SOLUTION: A bellows chamber 31 is furnished below a tank T to be inserted into a vacuum circuit, a bellowfrum 32 to be vertically divide into two is provided in the bellows chamber, a discharge conduit pipe 34 to lead working water staying in the tank to an upper side space of the bellows chamber from above is furnished, a delivery conduit pipe 36 to deliver working water led to the upper side space outside is furnished, and an air conduit pipe 35 to selectively supply air to a lower side space of the bellows chamber is furnished. The bellowfrum 32 is loosened upward and closes an end part of the discharge conduit pipe when pressure air is supplied to the air conduit pipe, and the discharge conduit pipe and the livery conduit pipe are communicated to each other through the upper side space when the air conduit pipe is opened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water removal device provided in a vacuum device for vacuum-fixing a work with a polishing device or a transfer device. The above-described water draining device is used in a glass edge chamfering device and a glass corner chamfering device.

[0002]

2. Description of the Related Art FIG. 1 shows a glass edge chamfering apparatus. The glass plate 1 is fixed by vacuum suction by a vacuum groove 3 formed on a table 2, and the table 2 itself is translated by a bar screw 4 in a direction perpendicular to the paper surface.
Reference numerals 5 and 6 denote polishing units installed at a 45 ° angle in order to polish both side surfaces of the glass plate 1 while the glass plate 1 is moving. The polishing units 5 and 6 are provided with two grindstones G1 and G2 having different diameters. In the polishing unit 5, the edge of the glass plate end face is machined (chamfered), and in the polishing unit 6, the conical-shaped grinding stone G3 is brought into contact with the glass plate end face to perform the end face polishing.

At the time of polishing, the glass plate 1 is suction-fixed to the table 2, but at the time of polishing, water of a polishing liquid is poured into a polishing portion to prevent overheating, reduce frictional force, and wash away polishing powder. Therefore, the polishing liquid is sucked into the vacuum pump connected to the vacuum groove 3, and the pump is damaged. Therefore, a water draining device 7 is inserted in the middle of the vacuum suction path. The tank diameter of the drainage device 7 is as small as several cm.

FIG. 2A shows the details of the draining device 7. A check valve 8 is provided below the draining device 7.
During vacuum suction, the pressure in the tank is reduced, so that the ball 9 in the check valve 8 is sucked upward and closes the discharge port 10.

To release the suction fixing of the glass plate 1 to the table 2, pressurized air is supplied into the water draining device as shown in FIG. At this time, as the ball 9 descends, the polishing liquid Q that has been sucked and accumulated in the draining device 7 is automatically discharged to the outside.

[0006]

By the way, the draining device 7
Since the polishing liquid sucked into the polishing pad contains grinding waste,
Due to the extremely small size of the ball 9 acting as a valve, which is several millimeters, the check valve 8 is clogged with dust, so that the valve does not function and the valve function of the tank becomes impossible. In such a case, the pressure in the vacuum groove 3 is not sufficiently reduced, and the glass plate 1 on the table 2 is not sufficiently sucked. In this case, a pressure detecting means (not shown) for detecting whether the pressure in the vacuum groove 3 is within a predetermined range is activated, and an abnormal operation signal of the apparatus is input to the control system. Stop operation automatically. If this happens,
It was necessary to clean or replace the inside of the check valve and return it so that the glass plate 1 was sufficiently sucked on the table 2 as normal.

A situation has arisen in which such cleaning must be performed frequently during the operation of the apparatus, resulting in poor usability. In addition, performing such cleaning on a device that is being operated causes a reduction in the operation rate, which is inconvenient. It was an object to provide a valve means that does not require such cleaning and can continue to operate stably for a long time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide a water draining device which eliminates the above-mentioned dust clogging by adopting a novel valve mechanism.

[0009]

As shown in FIG. 2, in place of the method of closing the discharge port with a ball as shown in FIG. 2, in the present invention, the discharge port is directly closed by bending a flat bellows flam. By adopting a simple mechanism such as opening, clogging has been eliminated.

[0010]

FIG. 3 shows a drainage device 20 according to an embodiment of the present invention. An upper plate 23 is attached to the upper part of the cylindrical main body 21 using bolts 22, and a flanged plug 24 having a convex shape when viewed from the side is applied to the lower part. Thereby, a tank T for receiving the above-mentioned polishing liquid is formed. Reference numeral 25 denotes an O-ring for keeping the inner peripheral portion of the cylinder main body 21 and the flanged plug 24 airtight.

Reference numeral 26 denotes a suction hole provided in the upper plate 23, which is connected to the table shown in FIG. 1 through a joint 27 inserted therein and a tube (not shown). 28 is
It is a suction hole provided in a predetermined portion of the cylinder main body 21 and is connected to a vacuum generator via a joint 29 inserted therein and a tube (not shown). The material of the cylinder main body 21 is acrylic or PVC because of the advantage that the inside can be seen, but aluminum or stainless steel is used with priority given to the durability of the tank.

Reference numeral 30 denotes a lower plate applied to the lower surface of the flanged plug 24. By forming a concave portion on each of the joint surfaces of the lower plate 30 and the flanged plug 24, a bellows chamber 31 is formed when the two members 24, 30 are brought into contact with each other.

Reference numeral 32 denotes a sheet-shaped bellows ram inserted when the flanged plug 24 and the lower plate 30 are joined to each other. The bellows chamber 32 divides the bellows chamber 31 into upper and lower spaces 31a and 31b. 33 is
It is a bolt for attaching the lower plate 30, the bellow flam 32 and the flanged plug 24 to the cylinder main body 21. Bolt 2
A plurality of 2 and 33 are attached along the circumference of the cylinder main body 21. As the bellow flam 32, a cloth-containing oil-resistant rubber was used from the viewpoint of durability.

A funnel-shaped drainage conduit 34 is formed in the center of the flanged plug 24 in a vertical direction, and an air conduit 35 is also formed in the center of the lower plate 30 in the vertical direction. Have been. The lower end of the drain conduit 34 opens into the space 31a, and the upper end of the air conduit 35 opens into the space 31b. Further, an L-shaped discharge conduit 36 is formed in the flanged plug 24, one end of which is open to the space 31a, and the other end is open to the outside.
Reference numerals 37 and 38 denote joints attached to the other ends of the air conduit 35 and the discharge conduit 36, respectively.

Next, the operation of the drainage device 20 will be described. In the standby state, as shown in FIG. 3, the bellows flam 32 is kept in a flat state.

FIG. 4A shows an operation state of the present water draining device during polishing (a glass plate is fixed on a table by suction). Compressed air is supplied to the air conduit 35 through the joint 37, and the bellows ram 32 flexes upward.
2 will be closed. On the other hand, when the vacuum is drawn through the joint 29, the polishing liquid Q sucked from the table accumulates in the tank.

After the polishing, the compressed air is supplied into the tank T through the joint 29 in order to release the suction fixing.
At the same time, the air conduit 35 is opened to the atmospheric pressure. As a result, as shown in FIG. 4B, the bellow flam 32 is bent downward, so that one end of the drain conduit 34 and one end of the discharge conduit 36 are opened, and the drain conduit 34 and the discharge conduit 36 are connected to the upper space 31 a The polishing liquid Q stored in the tank is discharged from the discharge conduit 36 to the outside.

FIGS. 5 and 6 show piping diagrams of the present water draining device 20, and FIG.
(A) and the state of FIG. 4 (B) in the state of suction release. The vacuum generator used here is an ejector that generates vacuum by flowing compressed air. The ON / OFF state of the solenoid (SOL) for switching the valve is shown below.

[0019]

In the above-described embodiment, the present drainage device is used for a polishing machine. However, the present drainage device can also be used for a transfer device having a mechanism for fixing a work by vacuum suction.

[0021]

As described above, the draining device of the present invention replaces the conventional method of closing the discharge port with a ball, and directly closes or opens the discharge port by bending the flat bellows flam. As a result, the occurrence of clogging can be eliminated, and the abnormal stop of the device has been completely eliminated. Since the drainage device of the present invention can be disassembled, parts can be easily replaced or the tank can be easily cleaned.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of use of a conventional water removal device.

FIG. 2 is a view showing the operation of the drainage device of FIG. 1;

FIG. 3 is a cross-sectional view showing one embodiment of a drainage device of the present invention.

FIG. 4 is a view showing the operation of the drainage device of FIG. 3;

FIG. 5 is a diagram showing a piping system in the state of FIG.

FIG. 6 is a diagram showing a piping system in the state of FIG. 4 (B).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 Drainage device 21 Cylinder main body 23 Upper plate 24 Flange plug 25 O-ring 30 Lower plate 31 Bellows chamber 31a Upper space 31b Lower space 32 Bellow flam 34 Drainage conduit 35 Air conduit 36 Discharge conduit

Claims (4)

[Claims] 1. A drainage device (20) for storing processing water sucked in a vacuum, comprising: a tank (T) inserted into the vacuum circuit; and a bellows chamber (31) located below the tank. A bellows fram (32) provided so as to divide the bellows chamber into upper and lower parts; a discharge conduit (34) for guiding processing water accumulated in the tank to an upper space of the bellows chamber from above; A discharge conduit (36) for discharging the processing water guided to the space to the outside, and an air conduit (35) for selectively supplying compressed air to the lower space of the bellows chamber, The drainage device according to claim 1, wherein, when pressurized air is supplied to the air conduit, the bellows ram is bent upward to close an end of the discharge conduit. 2. When the vacuum circuit is in a vacuum state, compressed air is supplied to the air conduit, and when compressed air is supplied to the vacuum circuit,
The water draining device according to claim 1, wherein the processing water accumulated in the tank is discharged to the outside through the discharge conduit by opening the air conduit to atmospheric pressure. 3. The drainage device according to claim 1, wherein the bellows flam is made of a cloth-containing oil-resistant rubber material. 4. The drainage device according to claim 1, wherein the main components constituting the device are made of aluminum or stainless steel.