JPS63150186A - Part fixture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a component mounting device that is attached to a component mounting machine and vacuum-chucks and mounts components onto a suction tube. [Prior Art] Small components such as electronic components There is a device that adsorbs and attaches it to an object to be attached, such as a printed circuit board. FIG. 5 is a perspective view showing a conventional component mounting device r of a component mounting machine, which is used for binding parts and attaching sub-components. In the figure, 1 is a robot arm of a component mounting machine, 2 is a mounting body fixed to this robot arm, and mounting plates 2a are integrally provided on the upper and lower sides. 3 is a pair of guide rods fixed between these mounting plates 2a; 4 is a movable support supported by these guide rods so that it can move up and down; It is moved in the vertical direction by a pneumatic cylinder 5. The above installation is for body 2. Guide rod 3. Town movement support holiday 4. The air modilinder 5 constitutes a vertical drive means 6. Reference numeral 7 denotes a fixture that is rotatably supported by the movable support 4 via a swing bearing 8, and has a gear 9 fixed to its upper end.

IO is an electric motor supported by a movable support 4 via a support plate 11, and transmits rotation to a gear 9 by a small gear 12 at the end of the shaft.

Above mounting tool 7. Swivel bearing8. Gear 9. Electric motor 10. Support plate 11. The small gear 12 constitutes a rotating means 13. Reference numeral 14 denotes a suction device which is fixed to the fixture 7 and is rotatable, and which vacuum suctions the electronic component 50 at the lower end of the suction tube 16 supported by the support tube 15. It is shown in the figure below.

The suction tube 16 is provided with a suction port 16a inside and has a communication hole 16b drilled in the back. 17 is a pair of upper and lower sealing members that are fitted into the suction tube 16 and prevent vacuum leakage between the inner diameter part of the support tube 15; 15a is a vacuum hole drilled in the support tube 15; 1 is screwed into the support tube; A vacuum tube 19 from a vacuum source is connected to a nipple communicating with the vacuum hole 15a. 20 is a pin fixture fixed to the lower part of the adsorption tube 16; 21 is a ring whose lower end is fixed to this pin fixture, and whose upper end is guided in a pin guide hole 15b provided in the support tube 15 so as to be movable up and down. The stop pin 22 is a compression spring that is fitted between the support tube 15 and the pin fixture 20 and constantly applies a downward force to the suction tube 16.

The operation of the conventional device described above is as follows. For example, a case will be described in which the electronic component 50 is mounted on a printed circuit board (not shown). The suction device 14 is moved by the vertical drive means 6.
is lowered, and the electronic component 50 is vacuum-suctioned to the lower end of the suction tube 16, raised, and moved above the mounting location on the printed circuit board surface. The rotation means 13 adjusts the angle of the electronic component 50 on the horizontal plane with respect to the mounting location. The suction device 14 is lowered by the vertical sounding means. By lowering, the electronic component 50 in the lower part of the suction cylinder 16 is placed on the printed circuit board. When they come into contact, the suction tube 16, which is prevented from rotating by the rotation stopper pin 21, can push the electronic component 50 by the dynamic friction force generated by the seal member 17 and the pushing force generated by the compression spring 22.The stroke of the pneumatic cylinder 5 At the end, the suction is released, the electronic component 50 is mounted on the printed circuit board, and the suction device 14 is raised.

[Problem that the invention seeks to solve]

In the conventional component mounting device as described above, the mounting force is mechanically determined by the spring pressure of the compression spring 22 pressing the suction cylinder 16, and the mounting force is determined mechanically by the shape, size, and number of pins of the electronic component 50. There was a problem in that it was not possible to change the mounting force to an appropriate level to accommodate various types of parts, and it was necessary to replace the compression spring with an appropriate spring field each time when mounting parts of various types and shapes. .

Further, when a change in height occurs due to warpage of the board, etc., it is not possible to mount the component with the set mounting force, resulting in the problem that component mounting is unstable.

This invention was made to solve the above-mentioned problems, and the mounting force is automatically controlled according to the shape, size, and number of bins of the parts to be mounted. The object of the present invention is to provide a component mounting device that can be mounted with a set mounting force even when the height changes due to bending or the like.

[Failure to solve the problem]

The component mounting device according to the present invention includes a load detector disposed in contact with the upper end of the suction cylinder supported in the support cylinder, and detects the force applied to the suction cylinder when vacuum suctioning and mounting the component. This detection signal is calculated by a control device and controlled to achieve a set mounting force.

[Effect]

In this invention, a load detector detects the reaction force of the suction tube that presses the suctioned part against the object to be mounted, and this detection signal is input to the control device and calculated and compared with a set value to generate a control signal. The ejection vertical drive means is controlled to achieve a predetermined mounting force.

〔Example〕

FIG. 1 is a perspective view showing an embodiment of the component mounting device according to the present invention, in which numerals 1 to 4, 7 to 13.15, and 16.2a are the same as those of the conventional device. The figure shows the case where electronic parts are used as parts, and 30 is a board 2 for mounting the upper and lower parts of the mounting body 2.
It is a screw shaft that is rotatably supported during the day, and a pulley 3 is attached to the upper end.
1 is fixed. Reference numeral 32 denotes an electric motor mounted on the plate 2b, which is integrally provided with the body 2, and is composed of a pulse motor or the like, and has a driving pulley 33 fixed to the shaft end. 34 is the Puri county and 31 K hanging belt.

Said mounting body 2゜2a, 2b, guide rod 3. Movable support 4
．． Screw shaft 30, pulleys 31, 33, electric @32.
Belt 34. Thus, the vertical drive means 35 is made 4'%r.

Next, 36 is a suction device [N
It is configured as shown in FIG. 2, and includes 15 to 22.
L5a, 15b, 16a, and 16b are the same as the conventional one shown in FIG. 5 of Section 2. 3''7 is a load detector that is in contact with the upper end of the suction tube 16, and has, for example, a pressure conversion element, detects the force that the suction tube 16 receives upward, and outputs a detection signal corresponding to the force.38 is a load detection device. It is a holder for holding the container 3'7, and is guided so as to be movable up and down by a retaining part 38a by three guide tools fixed to the fixture 7. 40 is a retaining part 38
A fixing device fixed to the upper end of a for holding the load detector 37 in a standby state with a predetermined downward force; It's a spring.

In FIG. 3, the vertical drive means 35 is detected by the load detector 37.
The block diagram of the control means which controls is shown. 42 is an amplifier that amplifies the detection signal of the load detector 37, and 43 is a control device that controls the entire component mounting machine, which calculates based on the signal from the amplifier 42, compares it with a set mounting force, and corrects the shortfall. On the other hand, a control signal is issued to operate the driving means 35 up and down, thereby further lowering the suction device 36 and increasing the mounting force on the electronic component 50. When the detection signal from the load detector 37 reaches the set value, the control device stops the downward pressurizing action by the vertical drive means 35.

The operation of the apparatus of the above embodiment is as follows.

The electronic component 50 years old is vacuum-suctioned to the tip of the suction tube 16, and moved by the robot arm 1 above the attachment point of the printed circuit board (not shown). The child part 5 is rotated by the rotation means 13.
Correct the angle on the 0 horizontal plane. The electric motor 32 of the vertical drive means 35 is started, and the suction device 36 is moved through the movable support 4.
lower. The electronic component 5o suctioned to the lower end of the suction cylinder 16 comes into contact with the printed circuit board, and the support cylinder 15 descends against the spring pressure of the compression spring 22. As a result, the load detection element 1ei36 received at the upper end of the adsorption cylinder 16 is pressurized via the compression spring 41 as the attachment 15 descends.

This pressing force serves as a pressing force to the heavy element component 50.

The detection signal from the weighted detector 37 is input to the control device 43 via the amplifier 42, where it is calculated as the component mounting force, compared with a set value, and a control signal is issued. Lower the mounting 36.

Detected 1. When the mounting force reaches the setting (direction), the control device 43 outputs control→J, releases the first suction of the electronic component 50, raises the suction device 36 by the vertical drive means 35, and completes the component mounting. do.

In the above embodiment, the part to be mounted is an electronic component, but this is not limited to this, and other types of parts may be used as long as the part can be vacuum-adsorbed and mounted with the required mounting force. It can also be used.

[Movement of invention]

As described above, according to the present invention, a load detector is disposed in electrical contact with the upper end of the suction cylinder supported in the support cylinder, and the suction cylinder which presses the suctioned electronic component onto the object to be mounted is mounted. The reaction force is detected by a load detector, this detection signal is input to the control device, calculated, compared with a set value, and a control signal is issued to control the vertical drive means to achieve a predetermined mounting force. , parts can be mounted stably and reliably with the required mounting force, and a wide variety of parts can be mounted with a single mounting machine.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a component mounting device according to the present invention, FIG. 2 is a vertical cross-sectional view of the suction device shown in FIG. 1, and FIG. FIG. 4 is a perspective view of a conventional component mounting device, and FIG. 5 is a vertical sectional view of the suction device shown in FIG. 4. 4... Movable support body, W... Fixture, 10... Electric motor, 13... Rotating means, 15... Support cylinder, 16...
・Suction cylinder, 16a... Suction port, 22... Compression spring,
32... Electric motor, 35... Vertical movement drive means, 36.
...Adsorption device, 57...Load detector, 43...Control device.

Claims (2)

[Claims] (1) Vertical drive means for moving the movable support up and down, rotation means for adjusting the rotation in the horizontal direction of a fixture rotatably supported by the movable support, and mounting on the fixture. A suction cylinder is supported in a vertically vertical support cylinder so as to be movable up and down, and this suction cylinder is provided with a suction port from the bottom end in the center, and the parts are sucked at the bottom end by vacuuming. It usually consists of a suction device that is pressed down by a compression spring, and when the suction device is lowered by a vertical movement drive means, the parts that are suctioned at the lower end of the suction cylinder are pressed onto the object to be sucked. The component mounting device includes a load detector that detects a mounting force applied to a suction tube that presses the component onto the object to be mounted and outputs a detection signal according to the force, and a detection signal of the load detector and a set A component mounting device comprising: a control device that compares a required mounting force value with a required mounting force value, and sends a control signal to the vertical drive means to control the vertical movement drive means to achieve the required mounting force. (2) The component mounting device according to claim 1, wherein the component is an electronic component.