JPH0155600B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printed circuit board electronic component insertion machine for inserting printed circuit board electronic components having terminals such as switches, volumes, capacitors, etc. into a printed circuit board. The purpose is to use a gear train to perform a series of operations accurately and quickly.

Therefore, the present invention provides a series of operations related to the loading chuck attached to the loading head and the insertion chuck attached to the insertion head so that they can move forward and backward and rotate freely using a cam mechanism and a gear train. The configuration is such that

The present invention will be described below based on drawings showing embodiments of the invention.

An embodiment of the present invention is shown in FIGS. 1 to 9.

FIG. 1 shows an overall view of an electronic component inserter for printed circuit boards using the insertion chuck of the present invention. In the figure, 10 is the insertion machine body, 20 is the control box, 30 is the X-Y table,
100 is a loading chuck, 200 is an insertion chuck, 300 is a loading head, and 400 is an insertion head. By operating the control box 20, a printed circuit board (not shown) is placed on the X-Y table 30 and moved, and electronic components (not shown) transferred from the loading chuck 100 to the insertion chuck 200 are placed at appropriate positions on the printed circuit board. inserted into.

FIG. 2 shows a detailed mechanical diagram of electronic component transfer between the loading chuck 100 and the insertion chuck 200. The loading chuck 100 is composed of a fixed finger 101, a movable finger 102, and an air cylinder 103 that operates the movable finger 102 to hold an electronic component (not shown), and is attached to the lower end of the loading head 300 with a screw 104. ing.

The loading head 300 has a pinion gear part 301 on the outer periphery of the middle part and an annular groove 302 on the upper end part.
A roller holder 310 with rollers 311 attached thereto at right angles to each other and a spring 381 are attached to the upper end thereof.

330 is a rack gear that meshes with the pinion gear part 301, and is connected to the air cylinder 340 via a joint 331, and a drive arm 360 is rotatably attached to a shaft 350 attached to the frame 11 constituting the insertion machine main body 10. and roller 3
61. Also the same axis 350
A drive arm 370 rotatably mounted on the loading head 300 is connected to the loading head 300 via two rollers 371 disposed within the annular groove 302.

The other ends of these drive arms 360, 370 are attached to a cam 52 for the loading head 300, which is fixed to the shaft 510 via cam followers 362, 372.
They are sliding at 0,530 respectively. Also coaxial 5
A cam 540 and a sprocket 550 for the insertion head 400 are fixed on the top of the chain 5.
60 drives cams 520, 530, and 540. These cams 520, 530, and 540 constitute a cam mechanism that performs a series of operations related to loading chuck 100 and insertion chuck 200.

On the other hand, the insertion chuck 200 is mounted on the insertion head 400 in such a direction that it receives electronic components from the loading chuck 100.

The insertion head 400 includes a cylindrical spline shaft 410 with a spline formed on the outside, an insertion rod 420 that passes through the shaft 410 and projects upward, and a spline shaft at the upper end of the insertion rod 420. 410 and a joint 440 having an annular groove 441 attached via a spring 430. The spline shaft 410 is connected to the insertion chuck 200 via a chuck holder 450 at its lower end.
is integrally attached and rotates around the insertion rod 420 together with a spline bearing 470 by input from a spur gear 460, which is one of the gear trains. A spur gear 610 that constitutes a gear train meshes with the spur gear 460, and this spur gear 610 is connected to the frame 1.
1 is connected to a driving source 600 such as a stepping motor or an air torque actuator. Additionally, the annular groove 44 of the joint 440
1 is provided with two rollers 481 and 482 in terms of diameter and attached to an insertion arm 480, which is supported by a shaft 483 at its rear end and whose tip is movable up and down. There is. A long hole 484 is formed in the middle portion of the insertion arm 480, and a cam follower 485 that slides in contact with the cam 540 is rotatably mounted therein.

In FIG. 3, loading head 300 is shown in more detail. The rotating shaft 380 is rotatably attached to rotating bearings 13 and 14 that are fixed to or integrally formed with the frame 11 and can move forward and backward. This forward and backward movement is guided in the axial direction without twisting due to the engagement between the pinion gear 301 and the rack gear 330. Further, between the spring receiver 382 adjacent to the roller holder 310 attached to the rear end of the rotating shaft 380 and the spring receiver frame 12 provided protruding from the frame 11, the rotating shaft 380 is always directed toward the tip. A biasing spring 381 is provided.

Further, FIG. 4 shows a structure for restricting rotation of the rotating shaft 380. The two rollers 311 attached to the roller holder 310 are connected to the rotation shaft 38
The loading chucks 100 mounted on the electronic parts are angularly spaced apart according to a predetermined rotation angle at which the loading chucks 100 are rotated to transfer electronic components. On the other hand, two buffer members 391 are attached to a buffer member holder 392 at positions that restrict rotation of the rotating shaft 380 and the loading chuck 100.
This buffer member holder 392 is fixed to the frame 11 with screws 15. The buffer member 391 is made of a rubber-based material, and is provided so as to extend a necessary length in the axial direction of the rotating shaft 380 in order to cushion and receive the roller and cause it to roll as the rotating shaft 380 advances and retreats. .

Note that 312 is a groove provided in the roller holder 310, which connects the roller holder 310 to the rotating shaft 380.
The screws 313 are used to ensure complete tightening.

Insertion head 400 is shown in more detail in FIG. That is, the spline shaft 410 is spline-coupled within the spline bearing 470, and the sleeve 471 is press-fitted into the portion without the spline and is in sliding contact within the bush 472. Spline bearing 470 and bush 4
72 is rotatably attached to the frame 11 via ball bearings 473 and 474.
A stopper nut 476 is screwed onto the upper end of the spline bearing 470, and a spur gear 460, which is one of the gear trains, is fixed in an overlapping relationship, and this spur gear 460 meshes with the spur gear 610 that constitutes the gear train, and the frame When necessary (when the hole positions 51 and 52 differ depending on the location and it is necessary to change the direction of the terminal 41 of the electronic component 40), the drive source 600 fixed to the electronic component 11 can accurately rotate the required rotation angle. It is designed to be able to rotate. Also, the spline shaft 41
Two nuts 475 are attached to the upper end of the joint 475 to prevent loosening, and a spring 430, which is a resilient member, is interposed between the nuts 475 and the joint 440.

Therefore, the spline bearing 4 is attached to the frame 11.
An insertion rod 42 is inserted into a spline shaft 410 which is rotatable and can be moved back and forth via a shaft 70.
0 is movable up and down by an insertion arm 480.

Insertion chuck 200 is shown in more detail in FIG. The chuck body 210 has a through hole 212 with a step 211 along the axis.
and a through hole 214 passing over the diameter of the through hole 212
is formed. An insertion tip 220, which is divided into two parts for assembly, is inserted into the tip of the through hole 212 and biased in the retracting direction with a spring 221, which is a resilient member, interposed between the tip and the chuck body 210. This insertion tip 220 has a recess 222 formed at its tip to receive the electronic component 40. Further, a piston 230 is slidably inserted into the through hole 212 via a spring 215, which is a resilient member, between the piston 230 and the step 211. The piston 230 has a taper 231 on its outer periphery, and a spring 215 and an insertion tip 220 on the inside.
A recess 232 is formed into which the rear end of the recess 232 is inserted. On the outside of the chuck body 210, a pair of inner fingers 241, 242 and a pair of outer fingers 251, 252 are arranged on the coaxial 21, respectively.
6,217 so as to be rotatable. Spring 24 interposed between inner fingers 241, 242 and outer fingers 251, 252
3, 244, the pair of inner fingers 241, 242 are in contact with the chuck main body 210 in the normal state as shown in FIG. Can hold 40. On the other hand, a pair of outer fingers 251,
252 has inter-terminal width correction claws 253 and 254 at the tip.
The rear end extends so as to close the through hole 214 and is brought into contact with the chuck body 210 by springs 243 and 244. The rear ends of the pair of outer fingers 251, 252 and the piston 230
A spherical or columnar extrusion member 260 is interposed in the through hole 214 between the piston 23 and the taper portion 231 of the piston 23 in the normal state as shown in FIG.
The tapered portion 231, the extrusion member 260, and the outer fingers 251, 252 of 0 are either in contact with each other or are slightly separated from each other.

Next, the operation of the printed circuit board electronic component insertion machine of the present invention will be explained.

First, set the printed circuit board on the X-Y table 30 shown in FIG.
When operated, the printed circuit board is moved by a driving source such as a stepping motor (not shown).

On the other hand, the loading chuck 100 receives an electronic component from a component supply section (not shown), holds it between a fixed finger 101 and a movable finger 102 by the operation of an air cylinder 103, and carries it by a cam 520 via a drive arm 360. Rack gear 33
0 is rotated directly below the insertion chuck 200 which meshes with the pinion gear 301 and transfers the electronic components. What allows the loading chuck 100 to stop rotating accurately between the electronic component receiving position and the delivery position is the relationship between the roller 311 and the buffer member 391 shown in detail in FIG. 4. That is, in the same figure, the position where the electronic component is received is when it is in contact with the left buffer member 391, and the rotation shaft 380 is rotating horizontally within the rotation bearings 13 and 14, and the right roller 311 is in contact with the right buffer member 391. The time when it comes into contact with the member 391 is the delivery position.
During this contact, the roller 311 is attached to the buffer member 391.
collides with each other, but the impact energy is absorbed and the parts come to a stop without vibration and with a slight tendency to press. Therefore, even if there is a backlash between the pinion gear portion 301 and the rack gear 330, the pinion gear portion 301 and the rack gear 330 are pushed toward one tooth side by this pressure bonding, play is eliminated, and an accurate position is maintained.

Also, at each position, the rotating shaft 380
As the roller 311 moves forward and backward, the buffer member 39
Roll on 1. That is, under the insertion chuck 200, the cam follower 372, the drive arm 370, and the roller 371 in the annular groove 302 are moved by the loading head cam 530.
The rotating shaft 380 is raised from the lower end position via the lower end position, and the loading chuck 100 approaches the insertion chuck 200 to deliver the electronic component. During this time, the roller 311 rolls on the buffer member 391 and rises. Thereafter, due to the shape of the cam 530, it descends in the opposite direction, and after descending, returns to the parts receiving position. Here, the roller 311 moves up and down during the receiving operation.

That is, the loading chuck 100 returns to the electronic component receiving position, which is also the component supply position, and
Waiting for the next supply of electronic parts.

On the other hand, when the electronic component is delivered, the insertion head 400 is in the raised position, and the pair of inner fingers 241 of the insertion chuck 200,
242 snaps in the electronic component and holds it as shown in FIG. In the state shown in FIG. 7, the holes 51 and 52 of the printed circuit board 50 into which the electronic component 40 is inserted are already located directly below the insertion chuck 200, as shown in FIG. chain 5
When the cam 540 is rotated by the drive of the cam follower 485, the tip of the insertion arm 480 lowers, and the entire insertion head 400 slides inside the spline bearing 470 and lowers the insertion chuck 20.
0 is lowered to a predetermined position, for example, 0.5 mm away from the printed circuit board 50, as shown in FIG. At this time, the nut 475 shown in FIG.
However, the stopping position of the insertion chuck 200 can be adjusted by rotating the nut 475 and the stopper nut 476. When the cam 540 rotates further and lowers the insertion arm 480, the insertion chuck 2
The position of 00 remains unchanged and the insertion rod is 420.
moves down inside the spline shaft 410 against the elastic force of the spring 430, and the tip pushes the piston 230 against the elastic force of the spring 215. Therefore, the piston 230 pushes the extrusion member 260 outward until it exceeds the tapered portion 231, rotates the outer fingers 251, 252 about the shafts 216, 217, and mutually adjusts the inter-terminal width correction claws 253, 254 at the tips.
Contract and close as shown in Figure 7. Therefore, the terminal 41 of the electronic component 40 held by the insertion tip 220 and the inner fingers 241, 242 is corrected so as to be narrowed to a predetermined width. At this time, the insertion head 400 is connected to the insertion rod 42.
0 is in contact with the rear end of the piston 230, and the bottom of the recess 232 of the piston 230 is just in contact with the rear end of the insertion tip 220. In this state, the tip of the insertion arm 480 further lowers, and the insertion rod 420 moves toward the piston 2.
30, the position of the chuck body 210 does not change and only the insertion tip 220 is pushed down by the spring 22.
The inner finger 24 descends against the elastic force of 1.
1,242 is expanded and pushed out, and the held electronic component 40 is inserted into the printed circuit board 50. At this time, the terminal 41 of the electronic component 40
4 corrects the terminal width to a predetermined value and matches the holes 51 and 52 of the printed circuit board 50, so that the electronic component 40 can be reliably inserted as shown in FIG.

Thereafter, as the cam 540 rotates, the tip of the insertion arm 480 rises, and the insertion rod 420 rises, reversing the insertion operation and returning to the normal state as shown in FIG.

In addition, if the positions of the holes 51 and 52 of the printed circuit board 50 are at different angles from the received state and it is necessary to insert the printed circuit board at this angle, the drive source 600 is driven by the second drive section to drive the spur gear 610,
460, rotate the spline shaft 410 by a predetermined angle via the spline bearing 470 to align the insertion chuck 200 with the holes 51 and 52 of the printed circuit board 50, and perform the above-described operation of the insertion head 400; After inserting the electronic component into the printed circuit board, the insertion rod 420 rises and the spline shaft 41
Turn the insertion chuck 200
It is designed to return to its original position.

In this way, one cycle of inserting the electronic component 50 is completed. By subjecting these operations to NC control, the insertion machine continues to work repeatedly and automatically.

Although this embodiment uses an X-Y table to adjust the position of the insertion head and printed circuit board, the present invention can also be applied to cases where the printed circuit board is fixed and the insertion head is moved. Of course.

As explained above, the present invention allows the loading chuck attached to the loading head and the insertion chuck attached to the insertion head to be moved forward and backward and rotated freely by a cam mechanism and a gear train. Because the series of operations by the cam mechanism is configured to perform a series of operations, parts can be transferred smoothly, and since the insertion chuck is rotated by a separate gear train, it can be precisely aligned with the transfer and insertion positions. Since electronic parts can be transferred and inserted in a series of mechanical operations, insertion can be performed smoothly, accurately, and at high speed.

Even if the orientation of the terminals of the electronic components implanted on the printed circuit board differs depending on the insertion position, since they are in different systems, it can be handled at any desired angle.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view of the printed circuit board electronic component insertion machine of the present invention, Fig. 2 is a perspective view of main parts showing the operating mechanism of the loading chuck and insertion chuck, and Fig. 3 is the loading head section. FIG. 4 is a front view of the insertion head, FIG. 4 is a view taken along the - arrow in FIG. 3, FIG.
The figure is a central vertical sectional view showing the normal state of the insertion chuck before it holds the component, FIG. 7 is a view similar to FIG. 6 showing the insertion chuck after the component is held, and FIG. FIG. 9 is a diagram similar to FIG. 6 showing a component insertion state. 10... Insertion machine main body, 11... Frame, 1
3, 14... Rotating bearing, 20... Control box, 30... X-Y table, 40... Electronic components for printed circuit board, 41... Terminal, 50... Printed circuit board, 51, 52... Hole, 100 ... Loading chuck, 200 ... Insertion chuck, 220 ... Insertion chip, 215, 22
1,243,244,430...Spring (resilient member), 230...Piston, 231...Tapered portion, 241,242...Inner finger, 25
1,252...outside finger, 253,254
...Terminal width correction claw, 260...Extrusion member, 30
0... Loading head, 301... Pinion gear section, 310... Roller holder, 311... Roller, 330... Rack gear, 340... Air cylinder, 360, 370... Drive arm, 36
2,372... Camu follower, 361,371...
... Roller, 380 ... Rotating shaft, 381 ... Spring, 391 ... Buffer member, 392 ... Buffer member holder, 400 ... Insertion head, 41
0... Spline shaft, 420... Insertion rod, 460... Spur gear, 470... Spline bearing, 480... Insertion arm, 52
0,530,540...Cam (cam mechanism).

Claims (1)

[Scope of Claims] 1. A rotating shaft with a loading chuck attached to the tip thereof is mounted on a rotating bearing integrated with a frame so as to be freely retractable and rotatable, and a pinion gear portion meshes with a rack gear on the rotating shaft. a loading head having a shape formed therein; a loading head provided parallel to and spaced apart from the loading head, and an insertion chuck attached to the tip;
A spline shaft is rotatably provided on the frame via a spline bearing, and an insertion rod connected to an insertion arm is moved forward and backward while normally separated from the insertion chuck inside the spline shaft. moving the insertion head freely inserted and the rotation shaft from the electronic component receiving position to the delivery position by moving the rack gear;
There, the loading chuck is raised to align the loading chuck with the insertion chuck to transfer the electronic component, and then returned, and the insertion rod is advanced to be associated with the insertion chuck to transfer the electronic component. a cam mechanism that performs a series of operations to insert the electronic component into the printed circuit board and then return it; and a cam mechanism that rotates the spline shaft to match the insertion position of the electronic component received in the insertion chuck before the insertion rod advances. 1. An electronic component insertion machine for printed circuit boards, characterized by comprising a gear train that rotates the electronic component and then returns and rotates after inserting the electronic component.