JPH0568878B2 - - Google Patents

Description

Detailed Description of the Invention ()...Field of Industrial Application The present invention relates to the structure of a chip tape cassette used in an automatic chip mount device that automatically mounts chips (various chip-shaped electronic components) onto a printed circuit board. This is related.

Several tens to hundreds of chip tape cassettes are set in one automatic chip mounter, and a high-speed moving head picks up each chip one by one and then mounts the chips on a printed circuit board. The top tape of the taped chip tape is peeled off to expose the chips, and each cassette is delivered to the head in a state where it is easy to chuck. It is provided in the form of a removable and replaceable cassette, and allows continuous supply of chips by simply replacing the cassette without stopping the device.

Therefore, the tip tape cassette with a trigger of the present invention is disclosed in the patent application No.
No. 70686, the title of the invention is ``Tip tape cassette for automatic chip mount device,'' that is, a mechanism that performs the intermittent pitch feeding action of the tip tape and the action of peeling off the top tape of the tip tape to expose the chips in a very simple manner. The invention is characterized in that a trigger is attached to the tip tape cassette according to the application, and a recess corresponding to the action of the trigger is formed in the fan-shaped plate. This makes it possible to exhibit excellent functions and effects as described below.

()...Configuration That is, the configuration of the tip tape cassette with a trigger of the present invention will be described with reference to an embodiment.A main part of a fan-shaped plate 4 having a narrow opening angle is mounted on a base 3 on which a reel 2 on which a tip tape 1 is wound is suspended. A spring 6 is stretched between the upper part of the fan-shaped plate 4 and the base 3 to bias the fan-shaped plate 4 in the right direction, and A lever 9 with a protruding pawl 8 at its tip is pivotally pivoted to the upper part of the fan-shaped plate 4 with a pivot 10, and the rear end of the lever 9 and the fan-shaped plate 4 are connected to each other. A spring 11 is placed between the reel 2 and the guide rails 12, 12' to urge the claw 8 upward.
Pitch hole 1a of tip tape 1 inserted between
At the same time, the peeled top tape 1b is wound around the top tape winding reel 13 with a one-way clutch mounted on the upper part of the base 3. For example, a spring 14 is stretched between the upper extension end 4a of the fan-shaped plate 4 and the reel 13 is attached to the top tape 1b.
The spring 1 is biased in the winding direction.
In the tip tape cassette, which is appropriately connected by fitting an outer cylinder 15 of a set length to the fan-shaped plate 4, a recess 1 is formed at the upper position of the driving force transmission point 7 of the fan-shaped plate 4.
A trigger 17 in the form of a rectangular plate is inserted into a long hole 18 in the substantially central part of the trigger 17 at a position in front of the fan-shaped plate 4 in the base 3, and is movable up and down by a set dimension by a support shaft 19 screwed onto the base 3. and rotatably mounted,
The protrusion 20 at the lower end faces the recess 16 of the fan-shaped plate 4, and the upper end projects above the guide rail 12, and the pin 21 and base 3 are fixed to the trigger 17.
A spring 23 is tensioned between the trigger 17 and the stopper pin 22 fixed to the trigger 17, and its elastic contraction force constantly urges the trigger 17 upward and presses the trigger 17 against the stopper pin 22.

()...Function In the above configuration, the tip tape cassette with a trigger of the present invention is configured such that when the trigger 17 is in the raised position, that is, the normal position (the support shaft 19 is pressed against the lower end of the elongated hole 18 by spring force), the lower end of the trigger 17 For example, when a roller 24 pivotally supported at the portion is pushed by a pressure bar 25 driven by an air cylinder or the like, the trigger 17 rotates about the support shaft 19, but the protrusion 20
enters into the recess 16 of the fan-shaped plate 4, so the fan-shaped plate 4 does not rotate.

Next, the trigger 17 is pressed down against the contractile force of the spring 23 by an appropriate means such as driving by a separate air cylinder, and in the operating position (the support shaft 19 is pressed against the upper end of the elongated hole 18), the roller 2
4, the trigger 17 rotates and collides with the driving force transmission point 7 of the sector plate 4, so that the sector plate 4
expands the spring 6 and rotates in a circular arc at the set angle, and the claw 8 of the lever 9 comes off the pitch hole 1a of the tip tape 1 to reach the set dimension (usually 1 pitch P).
(Feed 4mm) Retract and pitch hole 1a in the retracted position
The spring 14 is pulled by the rotation of the upper extension end 4a of the fan-shaped plate 4, and the reel 13 is rotated by a set angle, thereby moving the top tape 1b to the tip tape 1.
Peel it off and wind it up.

In the case of the above example, since the winding rotation of the top tape 1b by the reel 13 is performed via the spring 14 as described above, the spring 14
The elasticity plays the role of tension adjustment to keep the peeling force constant, and therefore, even if the winding diameter of the top tape 1b on the reel 13 changes in size, the peeling force of the top tape 1b does not change.

Next, when the pressure bar 25 retreats and the pressure from the roller 24 is released, the fan-shaped plate 4 returns to its original position due to the restoring force of the spring 6, and the lever 9
advances, and its claw 8 feeds out the tip tape 1 with the tip t exposed, from which the top tape 1b has already been peeled off in the above operation, to a predetermined size (usually 4 mm per pitch). That is, the exposed chip t is sent out to a predetermined size. In addition, the spring 11 that had been extended by the return rotation of the upper extension end 4a of the fan-shaped plate 4 contracts, and at the same time, the outer cylinder 1 of the set length is fitted around the outer periphery of the spring 11.
5 acts as a tension between the connection points of the springs 14 of both 4a and 13, causing the reel 13 to rotate back. At this time, since the reel 13 is installed on the one-way clutch, it spins idly regardless of the top tape 1b. Note that the connection structure between the upper extension end 4a and the reel 13 is not limited to the above example, and any structure can be used as long as it performs the same function.

As mentioned above, when the sector plate 4 moves forward, the claw 8 returns, the reel 13 rotates, and the top tape 1b
When the tip tape 1 is peeled off and wound up, the tip tape 1 is sent out in pitches during the return motion, and the reel 13 is provided so that it spins idly.According to this, both actions are performed individually, so each action is the same as the other action. The action is reliably carried out without being affected by the effects of the action, and there is no need to use a very strong spring 6, which plays the role of the driving force for the action.

Further, the pressing down of the trigger 17 is released in synchronization with the retreat of the pressing bar 25, and the trigger 17 returns to its original position by the contraction force of the spring 23.

The chips t exposed and delivered as described above are appropriately chucked by the head and transferred onto the printed circuit board.

()...Effects (1)...Since the trigger is attached and a recess is formed in the fan-shaped plate, the fan-shaped plate will rotate only when the trigger is pressed down by an appropriate means, and the top tape will be damaged by the forward movement. Peeling, winding, and sending out a fixed length of chip tape by reciprocating motion are performed separately.

This means that, for example, when tens to hundreds of chip tape cassettes of the present invention are normally installed in an automatic chip mounter, the operation for rotating the fan-shaped plates of all the cassettes is performed at the same time. (thus, eliminating the need for a configuration that operates for each individual cassette), and pressing the trigger only for the desired cassette according to the program rotates the fan-shaped plate, i.e., peels off the top tape, winds it up, and so on. It has the advantage of being able to feed out the chip tape, and therefore, for example, while it has a configuration that operates all cassettes at once as described above, it also has a head that moves at high speed to each cassette position and chucks the chips according to a program. By configuring the trigger to be pressed by an appropriate cylinder, etc. in time with the arrival of the target cassette, the chip mounting work can be made with much higher accuracy and speed, in conjunction with the effect described below (Section 2). obtain.

(2) ...In the present invention, as explained above, (i) the fan-shaped plate is sent to the fixed position by the forward movement (forced rotation performed by being pushed by the pressing bar) by the previous action; Peel off the top tape of the tip tape and wind it onto a reel. Note that the top tape of the chip that was chucked by the head in the previous peeling action has already been peeled off, and this time peeling is performed on the top tape on the subsequent chip.

(ii) The top tape is peeled off by the backward motion of the fan-shaped plate (pulled back by the contraction force of the spring), and the tip tape with the tip exposed is sent to a fixed position.

(iii) That is, the peeling and winding (forward) of the top tape and the feeding (return) of the tip tape are performed separately. Therefore, for example, if the trigger is pressed at the same time as the head reaches the destination cassette, the head will release the tip. While the tip is being chucked, the top tape at the rear position is peeled off and wound onto the reel, and at the same time as the head chucks the tip and moves, the trigger returns to its original position, and the fan-shaped plate also rotates to its original position. Then, the tip tape from which the top tape has been peeled off is fed to a fixed position.

Therefore, the chip chuck by the head is performed on a chip that has already been exposed and is in a fixed position, and the feeding of the chip tape for supplying a new chip is performed after the head has moved. There is no need to do it at high speed. That is,
Can be done slowly and accurately. Furthermore, since there is no need for high-speed delivery and only one-way backward movement, a strong spring is not required to move the fan-shaped plate backward.

(iv) In this respect, conventional chip tape cassettes
In all cases, the two operations of peeling off the top tape and sending out the tip tape were performed at extremely high speeds at the same time in time with the arrival of the head, so the mechanism was complex and the springs that acted on it had to be strong. However, due to the high speed movement of the tip tape and the vibrations generated by the mechanism, the extremely small and lightweight tips can dance, twitch, or bounce out of the holes, and the drawback is that However, the minimum required ``chip delivery and peeling time + chip chuck time by the head'' has been considered to be the limit of speeding up.

(v) In contrast to the above, the present invention allows the tip tape to be fed out slowly while the head is not present, and the mechanism is simple and does not use strong springs that would cause vibrations. There is no fear that the tip will dance, tumble, or jump out, so the tip can be chucked accurately and quickly by the head.

In addition, in the case of the present invention, while the head is chucking the tip, the top tape is peeled off, which is a separate function, and the tip is fed out while the head is not present. Even when the chip reaches the cassette, the chip can be checked immediately, which is an excellent feature that allows the speed to be increased several times compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a diagram schematically showing the construction of an embodiment of a tip tape cassette with a trigger according to the present invention. Number, 1...Tip tape, 1a...Pitch hole, 1b...Top tape, 2...Reel, 3
...Base, 4...Sector plate, 4a...Upper extension end, 5...Pivot, 6...Spring, 7...Driving force transmission point, 8...Claw, 9...Lever, 10...Pivot, 11... Spring, 12, 12'... Guide rail, 13... Reel, 14... Spring, 15... Outer cylinder, 16... Recess, 17... Trigger, 18... Elongated hole, 19... Support Shaft, 20... Protrusion, 21... Pin, 22... Stopper pin, 2
3...Spring, 24...Roller, 25...Press bar.

Claims (1)

[Scope of Claims] 1. A main part of a fan-shaped plate is pivotally pivoted on a base on which a reel of chip tape is suspended, and a spring is stretched between the upper part of the fan-shaped plate and the base. to urge the fan-shaped plate to the right, and use the vicinity of the center of the plate as a driving force transmission point, and a lever with a claw protruding from its tip is pivotably pivoted to the upper part of the fan-shaped plate, A spring is placed between the rear end of the lever and the fan-shaped plate to urge the claw upward, and the claw of the lever is removably engaged with the pitch hole of the tip tape pulled out from the reel and inserted between the guide rails. In addition, in a tip tape cassette, the peeled top tape is wound around a reel with a one-way clutch suspended above the base, and the reel and the upper extended end of the fan-shaped plate are connected by a spring or the like, in which the fan-shaped plate is used. A recess is formed at the upper position of the driving force transmission point, and a trigger is installed in the front position of the fan-shaped plate on the base so that it can be moved up and down by a set dimension and rotated by a set angle by means of a support shaft, etc. The automatic apparatus is characterized in that the lower end protrusion faces the recess, a spring is stretched between the trigger and the stopper on the base, and its elastic contraction force constantly urges the trigger upward and presses the trigger against the stopper. Chip tape cassette with trigger for mounting device.