JPH08118280A - Vacuum tweezers - Google Patents

Abstract

PURPOSE: To improve the operation performance of vacuum tweezers which sucks an objective substance such as IC, shifts the objective substance and releases it at a target position, and to prevent the erroneous operation. CONSTITUTION: A slider 6 for sliding the top end part of vacuum tweezers 100 for sucking an objective substance along the inner wall of an outer case 3, keeping the sealing performance, is constituted by always energizing the slider 6 in the top end direction by a spring 7, and a switch 9 for detecting the slide operation of the slider 6 and a solenoid valve A are installed at a part of the outer case 3. Further, a control circuit 10 which controls the suction and releasing operation of the vacuum tweezers 100 by opening and closing the solenoid valve A by receiving the detection signal is installed, and the opening and cut-off of the solenoid valve A are repeated each time when the slider 6 retreats inside the outer case, and the reverse operation of the suction and release of the vacuum tweezers 100 is carried out repetitively. Further, a display device for displaying the operation state of the vacuum tweezers 100 is installed.

Description

Detailed Description of the Invention

[0001]

This invention relates to vacuum tweezers,
More specifically, the present invention relates to a vacuum tweezer that detects the movement of the tip of the tweezers that adsorbs an object and automatically performs suction and release operations.

[0002]

2. Description of the Related Art A conventional vacuum tweezers will be described with reference to FIGS. First, the structure of the vacuum tweezers 120 shown in FIG. 6A is composed of an outer casing 3, a suction member 5 at the tip of the outer casing, and a manual valve C. The outer casing 3 and the suction pump 1 for drawing air are connected by a tube 2. Has been done.
The suction member 5 is made of an elastic member, has a hole in the center thereof, and serves as an air inlet. Further, the manual valve C shown in FIG. 7 is provided at an arbitrary position of the outer casing 3 that can be easily operated by a fingertip during work.

Next, the structure of the manual valve C will be described with reference to FIG. The figure (a) shows a state in which the fingertip is pushed to the right of the arrow L4, and the figure (b) shows the arrow L4.
4 shows the state of returning to the left of 4 by the force of the spring 54.

The outer casing 3 has a small inner side and a large outer side.
A two-stage hole 55 having two diameters coaxial with each other is bored, and a spring 54 is housed in a large cylindrical hole on the outside. Further, the hollow portion 4 of the outer casing 3 is provided around the hole 55.
A plurality of holes 53 are formed on the circumference around the hole 55 to connect the air and the outside air.

The valve member 50 is coaxially formed with a large disc portion 48 and a small columnar portion 49, and the small columnar portion 49 of the valve member 50 is provided so as to penetrate the hole 55. The retaining member 52 is fixed to the columnar portion 49 in the hollow portion 4 of the outer casing 3 to prevent the valve member 50 from falling off. The diameter of the disk portion 48 is large enough to cover the hole 53, and a sealing member 51 made of an elastic material is fixed to the surface of the disk portion 48 in contact with the outer casing 3 in order to improve the sealing performance.

Next, the operation of the vacuum tweezers 120 will be described with reference to FIGS. 6 (a), 7 (a) and 7 (b). First, when sucking an object (not shown) such as an IC, the valve member 50 is pushed to the right by the arrow L4 with the finger 16, and the sealing member 51 presses the outer casing 3 to close the hole 53. Therefore, the suction force of the suction pump 1 causes the air to be drawn into the suction pump 1 from the direction indicated by the arrow L1 through the central hole 17 of the suction member 5, the hollow portion 4 of the vacuum tweezers 120, and the tube 2. In this state, the object is adsorbed by the adsorption member 5, and thereafter, the state in which the object is adsorbed by the negative pressure by the suction force of the suction pump 1 is held.

When the object is released, the finger 16 is released and the valve member 50 is moved to the left of the arrow L4 by the force of the spring 54 to open the hole 53. Therefore, the hollow portion 4 in the negative pressure state is connected to the outside air to have the same pressure as the outside air, and the suction force is lost. Further, the air due to the suction force of the suction pump 1 is guided to the hollow portion 4 through a plurality of holes 53 having a cross-sectional area sufficiently larger than the central hole 17 of the suction member 5 as shown by an arrow L5, so that the target object is The adsorbing force is also reduced and the object is released.

Next, the operation of another conventional vacuum tweezers 130 will be described with reference to FIG. 6 (b).
It should be noted that only the tip portion, which is a feature of the vacuum tweezers 130, is shown in the figure. This replaces the vacuum tweezers 120 manual valve C shown in FIG. 6A, and the center hole 1 of the suction member 5 is placed at an arbitrary position that can be easily opened and closed by the finger 16.
The holes 15 for air circulation, which are sufficiently larger than 7, are formed in the outer casing 3.

When the object 15 is sucked, the hole 15 is closed by the finger 16, so that the suction force of the suction pump 1 causes the air to pass through the central hole 17 of the suction member 5 from the direction shown by the arrow L1 and to the hollow portion 4 of the vacuum tweezers 120. Is drawn into the suction pump 1 via. In this state, the object is adsorbed by the adsorption member 5, and after being adsorbed, the state in which the object is adsorbed by the negative pressure by the suction force of the suction pump 1 is maintained.

Next, when the object is released, the finger 16 is released to open the hole 15 so that the hollow portion 4 in the negative pressure state is communicated with the outside air to have the same pressure as the outside air. Further, since the air flow due to the suction force of the suction pump 1 is guided to the hollow portion 4 mainly through the hole 15 which is sufficiently larger than the central hole 17 of the suction member 5 as shown by the arrow L5, the force for sucking the object is increased. It will decrease and release the object.

As described above, in the conventional vacuum tweezers, when adsorbing an object, the manual valve C provided in the outer casing 3 or the opening / closing of the hole 15 must be operated with the finger 16. However, there is a risk that the object may be dropped due to a complicated operation.

[0012]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to improve workability and prevent erroneous work by using vacuum tweezers. Adsorption and release of an object to be adsorbed by vacuum tweezers can be reliably and efficiently performed by a simple operation. It is intended to provide vacuum tweezers that can be performed.

[0013]

The present invention has been devised to solve these problems, and a cylindrical slider having a suction member at its tip is provided along the inner wall of the outer casing of the vacuum tweezers. It is configured to be slidable while maintaining hermeticity, and this slider is always biased by the elastic body toward the tip of the vacuum tweezers, and a detector is installed to detect the retracting operation of the slider with respect to the outer casing. A solenoid valve that operates in response to a detection signal from a container is provided on the outer casing of the vacuum tweezers.

The solenoid valve is provided inside the suction pump or at an arbitrary position of a tube connecting the suction pump and the outer casing of the vacuum tweezers.

Further, a solenoid valve is provided and a valve mechanism for manually opening and closing is provided on the outer casing of the vacuum tweezers.

Furthermore, the above problem is solved by providing a display element for displaying the operating state of the vacuum tweezers on the outer casing of the vacuum tweezers.

[0017]

[Operation] Press the adsorption part of the slider against the object to be adsorbed,
The object is attracted to the vacuum tweezers by sliding the slider, the object is pressed against the place where the object is released, and the object is released by sliding the slider again. You can move things. In addition, the object can be manually released at an arbitrary place as needed during work.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A vacuum tweezers 100 according to the present invention will be described with reference to FIGS. It should be noted that components having the same configuration as the conventional example and performing the same operation are denoted by the same reference numerals as those of the conventional example, and description thereof will be omitted.

Embodiment 1 At the tip of the vacuum tweezers 100, a slider 6 is slidably held on the inner wall of the outer casing 3 in a direction indicated by an arrow L2 while maintaining hermeticity. At the tip of the slider 6, a suction member 5 formed of an elastic body and having a center hole 17 is fixed. Further, the slider 6 is urged downward by the arrow L2 by the spring 7 provided between the step portion of the outer casing 3 and the protrusion 8, and the protrusion 8 also prevents the slider 6 from coming out of the outer casing 3. are doing.

A switch 9 which is closed between the slider 6 and the outer casing 3 by moving the slider 6 in the upward direction of the arrow L2.
Are provided as motion detectors for the slider 6. Further, the solenoid valve A and the LED 20 are provided at arbitrary positions in the outer casing 3, and the control circuit 10 controls the detection of the opening / closing operation of the switch 9 and the operation of the solenoid valve A and the LED 20.

Next, the structure of the solenoid valve A will be described with reference to FIG. The figure (a) has shown the state which the valve is not operating, and the figure (b) has shown the state which is operating.

The outer casing 3 has a small inner side and a large outer side.
A two-stage hole 35 having the same diameter is coaxially bored, and the spring 34 and the coil 2 are provided in the outer large cylindrical hole.
1 is stored. The spring 34 is a valve member 3 described later.
This is for urging 0 to the right as indicated by arrow L3. Further, around the hole 35, a plurality of holes 33 are formed on the circumference centering on the hole 35 for connecting the hollow portion 4 of the outer casing 3 and the outside air.

The valve member 30 is formed coaxially with a large disk portion 28 made of a magnetic material and a small columnar portion 29, and the small columnar portion 29 of the valve member 30 is provided through the hole 35. The retaining member 3 in the hollow portion 4 of the outer casing 3
2 is fixed to the columnar portion 29 to prevent the valve member 30 from falling off. The diameter of the disk portion 28 is large enough to cover the hole 33, and a sealing member 31 made of an elastic material is fixed to the surface of the disk portion 28 in contact with the outer casing 3 to improve the sealing performance.

As shown in the block diagram of FIG. 3, the control circuit is configured so that one end of the switch 9 is connected to the power source through the resistor R and the other end is grounded. One end connected to the power supply through the resistor R is input to the chattering prevention circuit 11,
Further, the flip-flop circuit 12 inputs the data to the drive circuit 13 and the LED lighting circuit 14 to input the coil 21 and the LED 2 to each other.
Drive 0.

Next, the operation of the vacuum tweezers 100 will be described. First, regarding the suction operation, when the suction member 5 is pressed against the object to be sucked, the slider 6 slides along the inner wall of the outer casing 3 in the upward direction indicated by the arrow L2 against the force of the spring 7. This sliding operation is stopped by the contact of the two terminals of the switch 9, and the switch 9 is closed. Therefore, the input voltage of the chattering prevention circuit 11 changes from High to Low and receives the adsorption operation signal.

The flip-flop circuit 12 receives a pulse signal in synchronization with the opening / closing operation of the switch 9 from the chattering prevention circuit 11 and performs an inversion operation to drive a current through the coil 21 and an LED lighting circuit 14 for lighting the LED 20. To the operating state. When a current is passed from the drive circuit 13 to the coil 21, the valve member 30 of the solenoid valve A made of a magnetic material resists the force of the spring 34 and is indicated by an arrow L.
3 is sucked in the left direction, and the sealing member 31 comes into contact with the outer casing 3 to shield the hole 33.

Therefore, the suction of the air by the suction pump 1 is performed through the central hole 17 of the suction member 5 because the inflow path passing through the hole 35 shown by the arrow L5 is blocked, and the object is sucked by the suction member 5. , It is possible to move to the desired place.

Next, in the releasing operation, the object is pushed at the target place, the slider 6 is again drawn along the inner wall of the outer casing 3, and the switch 9 is closed, so that the input to the chattering prevention circuit 11 is changed from High. It becomes Low, and the operation signal is received again. Therefore, the output of the flip-flop circuit 12 is inverted and the drive circuit 1
3 and the operation of the LED lighting circuit 14 will be stopped.

When the drive circuit 13 is stopped, the solenoid valve A
The current flowing through the coil 21 of the solenoid valve A is stopped and the force of the spring 34 moves the valve member 30 to the right of the arrow L3 to move the solenoid valve A
Is open. Therefore, air flows from the outside air into the hollow portion 4, the pressures of the hollow portion 4 and the outside air become equal, and the sucked air mainly passes through the hole 33 having a large cross-sectional area, and the tip of the vacuum tweezers 100. The adsorption force at will reduce and release the object.

The LED lighting circuit 14 also operates in synchronization with the operation of the drive circuit 13, and when the object is adsorbed, LE
D20 is turned on and turned off in the released state to display the operating state of the vacuum tweezers 100.

It goes without saying that the setting of the solenoid valve A may be set at any position of the suction pump 1 or the tube 2 in the first half. Further, the structure of the solenoid valve A is not limited to that shown in FIG. 2, but may be another configuration that operates in the same manner.
The setting position of the LED 20 is not limited to the position shown in FIG. 1 in terms of the operation of the vacuum tweezers 100, and it may be provided at any position where it is easy to recognize the operating state.

Second Embodiment Next, a vacuum tweezers 110 which is a second embodiment of the present invention will be described with reference to FIGS. The configuration is the same as that of the first embodiment except that a manual valve B is added to an arbitrary position of the outer casing 3 where the operability is good as shown in FIG. They are the same, and the configuration and operation of the manual valve B will be described here.

FIG. 5 shows the structure of the manual valve B. The outer casing 3 has a small cylinder on the inside and a large cylinder on the outside which is coaxial with a two-step hole 45. A spring 44 is housed inside the large cylinder on the outside. Further, a valve member 40, which has a small cylindrical portion 39 on the inner side and a large disc portion 38 on the outer side and which is coaxially configured, is provided so as to penetrate through the hole 45, and prevents the disc portion from coming off in the hollow portion 4. Member 4
2 is fixed to the columnar portion 39 to prevent the valve member 40 from falling off.

Further, a plurality of holes 43 are formed around the hole 45 in order to connect the hollow portion 4 and the outside air. The retaining member 42 is formed in a size that covers the hole 43,
A sealing member 41 made of an elastic material is fixed to the surface of the outer casing 3 in contact with the inner wall so as to improve the sealing performance. The spring 4
4, the valve member 40 is urged to the left as shown by the arrow L4, and all the holes 43 are closed except when the manual valve B is operated, and the normal vacuum tweezers are operated. .

As described above, when the manual valve B is not operated, the hole 43 is closed and the vacuum tweezers 110 perform the same operation as that described in the first embodiment. Next, with the finger 16, the valve member 40 is resisted against the force of the spring 44 and the arrow L
When the sealing member 41 is moved to the right of 4 to separate the sealing member 41 from the inner wall of the outer casing 3 and the hole 43 is opened, air is introduced from the outside air into the hollow portion 4 to eliminate the negative pressure state of the hollow portion 4. Further, the sucked air mainly passes through the hole 43 having a large cross-sectional area, and the suction force at the tip of the vacuum tweezers 110 is reduced to release the object.

Therefore, by providing the manual valve B in the previous period, the adsorbed object can be opened without sliding the slider 6, that is, the object can be opened at any place in a non-contact state. Further, instead of the manual valve B, the hole 15 shown in FIG. 6B described in the conventional example may be provided and opened and closed by the finger 16.

[0037]

According to the vacuum tweezers of the present invention, an object to be adsorbed is adsorbed by pressing the object to be adsorbed with a constant sliding distance, and is also pressed with a constant sliding distance to a place to be released. Since the object can be released by the method, the fingers and the arm are not tired, continuous work is facilitated, and workability is improved. In addition, the risk of dropping the suction target object due to an erroneous operation is eliminated.

Further, by providing the manual valve mechanism, the object can be released even in a place where a fixed sliding distance cannot be maintained.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a vacuum tweezers according to the present invention.

FIG. 2 is a schematic cross-sectional view of a solenoid valve used in the vacuum tweezers of the present invention, in which (a) shows a state in which the valve is open,
(B) shows a state in which the valve is closed.

FIG. 3 is a block diagram of a control circuit for controlling an electromagnetic valve of vacuum tweezers of the present invention.

FIG. 4 is an embodiment in which a manual valve is added to the vacuum tweezers according to the present invention.

5A and 5B are schematic cross-sectional views of a manual valve, in which FIG. 5A shows a valve open state and FIG. 5B shows a valve closed state.

FIG. 6 is a schematic cross-sectional view of a conventional example of vacuum tweezers, in which (a) shows a configuration in which a hole provided in an outer casing is opened and closed by a finger, and (b) shows a configuration in which it is opened and closed by a manual valve. Shows.

FIG. 7 is a schematic cross-sectional view of a manual valve that constitutes a conventional vacuum tweezer, in which (a) shows a state in which the valve is open,
(B) shows a state in which the valve is closed.

[Explanation of symbols]

 1 Suction pump 2 Tube 3 Outer casing 4 Hollow part 5 Adsorption member 6 Slider 7, 34, 44, 54 Spring 8 Protrusion 9 Switch 10 Control circuit 11 Chattering prevention circuit 12 Flip-flop circuit 13 Drive circuit 14 LED lighting circuit 15, 33, 35, 43, 45, 53, 55 hole 16 finger 17 center hole 20 LED 21 coil 28, 38, 48 disk part 29, 39, 49 columnar part 30, 40, 50 valve member 31, 41, 51 sealing member 32, 42 , 52 retaining member 60 disc part 61 cylindrical part A solenoid valve B, C manual valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoichi Higashi 5-1 Noguchi Kita, Kokubun City, Kagoshima Prefecture Sony Kokubun Co., Ltd.

Claims (4)

[Claims] 1. A vacuum tweezer which sucks air by a suction pump to adsorb and move an object, reduces the suction force at the destination and releases the object, and a slider having a tip structure portion for adsorbing the object. Is slidably held along the inner wall of the outer casing of the vacuum tweezers while keeping the airtightness, and the slider is always biased toward the tip of the vacuum tweezers by an elastic body to detect the sliding movement of the slider. A detector and a circuit that processes a detection signal of the detector are provided, and further, an electromagnetic valve that is controlled to be opened and closed by the circuit to open or shut between the inside of the outer casing and the outside air is provided in the outer casing. Vacuum tweezers. 2. The vacuum tweezers according to claim 1, wherein the electromagnetic valve is provided at an arbitrary position of a tube connecting the suction pump and an outer casing of the vacuum tweezers. 3. The vacuum tweezers according to claim 1, wherein a valve mechanism that is manually opened and closed is provided on the outer casing of the vacuum tweezers. 4. The vacuum tweezers according to claim 1, wherein a display element for displaying an operating state of the vacuum tweezers is provided on an outer casing of the vacuum tweezers.