JPH05235594A - Electronic component suction head - Google Patents

Abstract

PURPOSE:To obtain an electronic component attracting head which is capable of releasing an electronic component to a specified position without fails by installing a depressor which is provided with a cylinder-shaped body where a suction port is bored and installed on the lower end so as to attract electronic components and a depressing section which moves vertically in a negative pressure chamber, and what is more, moves forward and backward from the suction port, which are all integrated in one piece o the lower end. CONSTITUTION:An electronic component 3 is attracted into a suction hole 4 by a negative pressure generated in a negative pressure chamber 2 by driving a negative pressure generation device 1. Under this state, a depressor 7 is depressed by an atmospheric pressure and lifted upward against the restoring force of a spring 16. After that, the depressor 7 drops downward by its self weight and the restoring force of the spring 16. At that time, the rear part 6 of an impulse section 14 of the depressor 7 is collided with a nearby offset portion, which restricts downward strokes. The depressing section 6 is projected outside from the suction port 4 where the electronic component 3 is forcibly separated from the suction port 4. Then, the electronic component 3 can be released definitely by lifting a main body 5 by means of a lift device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component suction head.

[0002]

2. Description of the Related Art A conventional electronic component suction head is shown in FIG. In this conventional example, the suction head has a tubular main body 5 having one end connected to the negative pressure generating device 1. The main body 5 has a suction port 4 at the other end, and when the negative pressure generator 1 is driven, negative pressure is generated inside the main body 5 and approaches the suction port 4,
Alternatively, the contacting electronic component 3 is sucked toward the main body 5 side due to the negative pressure.

As shown in FIG. 5, the negative pressure generator 1 is constructed to have a pair of electromagnetic valves 8a and 8b and a vacuum pump 10 connected to the suction port 4 via a one-way valve 9. , Operates as follows. First, in the operating state of the negative pressure generating device 1, as shown in FIG. 5A, the first electromagnetic valve 8a is in the open state, the second electromagnetic valve 8b is in the closed state, and the drive from the supply port 11 is performed. Air (indicated by an arrow in the figure) is delivered into the vacuum pump 10 via the first electromagnetic valve 8a. As a result of the jet action of the driving air sent into the vacuum pump 10, the branch passage on the side of the one-way valve 9 of the vacuum pump 10 becomes a negative pressure with respect to the suction port 4, so that the one-way valve 9 is opened to suck the outside air. Inhale through mouth 4. At this time, the electronic component 3 is adsorbed by the suction port 4 which is generated due to the difference with the atmospheric pressure of the outside.

Next, when the negative pressure generator 1 is stopped, as shown in FIG. 5 (b), the first and second electromagnetic valves 8a and 8b are closed, and the vacuum pump 10 for driving air is used. Inward delivery is stopped. In this state, the negative pressure of the suction port 4 is released over time, the suction force is lost, and the electronic component 3 is released.

However, when the electronic component 3 is held and released by the above-described cycle, the suction port 4
Has a drawback that the electronic component 3 may not be released if the adhesion between the electronic component 3 and the electronic component 3 is good, or if there is a sticky foreign substance between the suction port 4 and the electronic component 3. It was a thing.

Therefore, as shown in FIG. 5 (c), a release operation can be ensured by adding a vacuum breaking cycle in which the first electromagnetic valve 8a is closed and the second electromagnetic valve 8b is opened. Has been done. In this vacuum breaking cycle, the driving air is sent to the vacuum pump 10 via the second electromagnetic valve 8b and the one-way valve 9 to be discharged to the exhaust port 12.
The electronic component 3 that is sucked into the suction port 4 and is adsorbed by the suction port 4 is forcibly released.

However, the release by vacuum breaking has a drawback that the electronic component 3 is released abruptly, so that the mounting position on the printed circuit board is displaced or the electronic component 3 is broken. It was a thing.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above drawbacks, and an object of the present invention is to provide an electronic component suction head capable of reliably releasing an electronic component to a predetermined place. And

[0009]

According to the present invention, the above object is provided with a negative pressure chamber 2 connected to a negative pressure generating device 1 inside and having a lower end at the lower end, as shown in FIG. 1 corresponding to an embodiment. A cylindrical main body 5 having a suction port 4 for sucking the electronic component 3;
This is achieved by providing an electronic component suction head that is vertically slidable in the negative pressure chamber 2 and that has a pressing element 7 integrally provided with a pressing portion 6 that moves forward and backward from the suction port 4 at the lower end. ..

[0010]

The electronic component suction head has a body portion 5 provided with a suction port 4 for sucking the electronic component 3, and a negative pressure chamber 2 is formed in the body portion 5.

By driving the negative pressure generating device 1, a negative pressure state is formed in the negative pressure chamber 2 and the electronic component 3 is sucked. On the other hand, when the negative pressure generating device 1 is stopped, the pressing element 7 is caused by its own weight. When it is dropped downward, the pressing portion 6 projects from the suction port 4, and the electronic component 3 attracted to the suction port 4 is forcibly released.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. The suction head is composed of a main body portion 5 having a negative pressure chamber 2 therein and a presser 7 housed in the negative pressure chamber 2, and the negative pressure chamber 2 is perforated in a bottom wall 13 of the main body portion 5. While being opened to the outside through the suction port 4,
The upper end is connected to the negative pressure generator 1.

The pressing element 7 has a sliding portion 14 that slides up and down along the inner wall of the negative pressure chamber 2, and a pressing portion 6 that projects downward from the center of the back surface of the sliding portion 14. Then, as the sliding portion 14 slides, the pressing portion 6 advances and retreats outward from the suction port 4 of the main body portion 5.

The sliding portion 14 has an air insertion hole 1
5 is perforated, the pressures of the respective compartments in the negative pressure chamber 2 partitioned by the sliding portion 14 are made equal, and a spring 16 is housed above the sliding portion 14 to press the pusher 7 Is urged downward.

Next, the operation of this embodiment will be described with reference to FIGS. 2 and 3, the spring 16 is not shown. First, in the state where the negative pressure generator 1 is driven, as described in the conventional example, the negative pressure chamber 2
The electronic component 3 is attracted to the suction port 4 by the negative pressure generated inside. Further, in this state, since the pusher 7 is pushed by the external atmospheric pressure, it is pulled upward against the restoring force of the spring 16. At this time, the upper surface of the peripheral edge of the sliding portion 14 is a step portion 1 formed at a boundary portion between the negative pressure chamber 2 and the communication passage 18.
7, the upper stroke is determined (see FIG. 2).

After that, when the negative pressure generator 1 is stopped,
Since the upward pulling force on the pusher 7 disappears and the pressure difference between the communication passage 18 and the negative pressure chamber 2, that is, the pressure on the front and back surfaces of the sliding portion 14 becomes equal, the pusher 7 has its own weight, and Due to the restoring force of the spring 16, it falls downward. At this time, the back surface of the sliding portion 14 of the pressing element 7 abuts on the step portion 19 near the suction port 4, and the downward stroke is restricted.

When the pressing member 7 is dropped, the pressing portion 6 is projected from the suction port 4 to the outside, the electronic component 3 is forcibly peeled from the suction port 4, and then the main body portion 5 is lifted by an elevating device (not shown) so that the electronic component 3 The part 3 is released.

In the above embodiment, the negative pressure chamber 2
A configuration is shown in which a spring 16 is arranged inside and the pusher 7 is forcibly pulled down when the negative pressure generation device 1 is stopped.
May not be provided if it is sufficient to forcibly peel.

[0019]

As is apparent from the above description, according to the present invention, since the pusher sliding up and down is housed in the negative pressure chamber, the pusher pushes the electronic component when the negative pressure generator is stopped. It will be released forcibly and the operation will be reliable.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing an operation of the present invention.

FIG. 3 is a diagram showing an operation subsequent to FIG.

FIG. 4 is a diagram showing a conventional example.

FIG. 5 is a diagram showing an operation of the negative pressure generating device.

[Explanation of symbols]

 1 Negative Pressure Generating Device 2 Negative Pressure Chamber 3 Electronic Component 4 Suction Port 5 Main Body 6 Pressing Part 7 Presser

Claims (1)

[Claims] 1. A negative pressure chamber (2) connected to a negative pressure generator (1).
Suction port that has an inside and that adsorbs the electronic component (3) at the lower end
A cylindrical main body (5) in which (4) is opened, and a pressing part (6) which is vertically slidable in the negative pressure chamber (2) and which moves forward and backward from the suction port (4) at the lower end. An electronic component suction head having a presser (7) integrally provided with.