JPH0357316Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Table of contents] - Overview - Industrial application field - Prior art - Problems that the invention aims to solve - Means for solving the problems - Effects - Examples - Effects of the invention [Summary] ] The lead wire of the radial tape component is held at a predetermined position, and the position of the lead wire is corrected and held by clamping it with enough force to not cut the lead wire between a pair of mutually opposing V blades. Then, with the lead wire corrected to a predetermined position, the lead wire is grasped with a chuck or the like, and then the lead wire is cut with the V-blade. This corrects misalignment due to bending of the lead wire, etc., and facilitates subsequent insertion of the lead wire into the printed circuit board.

[Industrial application field]

The present invention relates to a radial tape component supply device for an electronic component insertion device that supplies radial tape components in which the lead wire portions of radial lead electronic components such as diodes and transistors are taped at a constant pitch, and mounts each component onto a printed circuit board, etc. In particular, the present invention relates to a lead wire cutting mechanism for cutting and separating lead wires of radial tape components from the tape.

[Prior art]

An example of a radial tape component is shown in FIG. Lead wires 3 of electronic components 2 are fixed on a continuous tape 1 at a constant pitch. 4 is a sprocket hole for feeding the tape. Such radial tape components are supplied by the component supply device of the electronic component insertion device, and after each component is cut and separated at the lead wire section, each lead wire is inserted into the insertion hole of the printed circuit board by the insertion head. These are soldered together to form an electronic circuit on a printed circuit board.

In such a radial tape component feeding device, the tape to which the radial tape components are fixed is fed intermittently at a constant pitch, and at a lead wire cutting section equipped with a cutter having a V-blade, the root of the lead wire of each electronic component is cut. the chuck of the insertion head (in order to correct the misalignment of the lead wire 3 and grasp it).
(Many have a V-shaped lead wire gripping groove formed in the lead wire gripping part of the chuck claw.)
Cut the lead wires with a cutter to separate the electronic components from the tape, move the insertion head to transfer the electronic components onto the printed circuit board that has been set in advance, and then lower the insertion head to remove the lead wires from the printed circuit board. is inserted into the insertion hole. The cutter that constitutes the lead wire cutting mechanism consists of a pair of opposing serrated cutters with a plurality of V blades corresponding to the position of the lead wire to be cut, and cuts the part to be cut with the gap between both cutters. In this state, the insertion head chuck grips the lead wire, and then the V blades of both cutters cut the lead wire by shearing action.

[Problem that the invention attempts to solve]

In the conventional lead wire cutting mechanism for radial tape components, when the lead wire of the component is grasped with a chuck before cutting due to bending of the lead wire or variations in the mounting position of the component, the position of the lead wire is large and the chuck claw is If you try to insert the lead wire into the insertion hole of the printed board after cutting it, the lead wire may be grabbed while being misaligned from the V-shaped lead wire gripping groove.
There was a problem in that the positions of the lead wire and the insertion hole were not aligned, resulting in insertion errors.

The present invention was devised in view of the above-mentioned drawbacks of the prior art, and even if the lead wire of a radial tape component is misaligned due to bending or the like, the lead wire can be straightened and then the chuck can be removed. To provide a lead wire cutting mechanism which corrects the position of a lead wire by gripping and cutting the lead wire, and enables the lead wire to be reliably inserted into an insertion hole at a predetermined position.

[Means for solving problems]

In order to achieve this object, the present invention includes a feeding means for intermittently feeding the radial tape component, a first cutter comprising a plurality of V blades for receiving the lead wire of the radial tape component, and each of the first cutters. V
a second cutter having a cutting edge facing the blade; and a cutting drive means for cutting the lead wire by moving at least one of the first or second cutter in the direction of the other cutter when cutting the lead wire. In a lead wire cutting mechanism for a radial tape component, the mechanism includes an opening means for separating the first and second cutters from each other after cutting the lead wire and providing a gap between the two cutters, the operation of cutting each lead wire of the radial tape component. A lead wire straightening and holding means is provided which clamps the lead wire by applying force with a strength that does not cause the lead wire to be cut by the V blade of the first cutter and the opposing cutting blade of the second cutter. There is.

[Effect]

The lead wire is held between a pair of opposing V blades before cutting, and even lead wires that are misaligned to the extent that they cannot be corrected by the V groove of the chuck claw can be handled.
The lead wire is forcibly positioned at the top by the intersection of both sufficiently large V blades, and the lead wire is corrected and held at this position. At this time, the clamping force of both V blades should be strong enough not to cut the lead wire.

〔Example〕

1 to 3 are front views sequentially showing the operation of the lead wire cutting mechanism according to the present invention, and FIG. 4 is a plan sectional view of the lead wire cutting mechanism.
A cutter wheel 5, a sprocket wheel 7, a drive wheel 19, and a cam 17 are rotatably mounted on a shaft 27 attached to a frame 35 (FIG. 4). A plurality of cutters 6 are formed on the outer periphery of the cutter foil 5 at the same pitches as the mounting pitches of the electronic components 2 fixed to the tape. Each cutter 6 is a serrated cutter consisting of three V blades 6a, and the three V blades 6a are formed corresponding to the positions of the lead wires 3 to be cut. Sprocket foil 7
has a protrusion 8 that fits into the sprocket hole 4 of the continuous tape 1 to be fed. A recess 9 for positioning is formed between each protrusion 8 of the sprocket foil 7. A roller 10 attached to one end of a lever 11 is fitted into this recess 9 to position the sprocket wheel 7 and intermittently stop the radial tape component at the lead wire cutting position. The lever 11 is the support shaft 1
3, and a spring 12 is engaged with the other end to always bias the roller 10 in the direction of the sprocket wheel 7. A timing belt 20 is engaged with the drive wheel 19 and performs intermittent feeding motion by a ratchet mechanism which will be described later.

A cutter member 14 is provided adjacent to the cutter wheel 5 so as to be rotatable about a support shaft 15 as a fulcrum.
A cutter 36 having a V-blade 36a at the same pitch as the V-blade 6a of each cutter 6 of the cutter foil 5 is formed on the cutter member 14 at a position facing the cutter 6 of the cutter foil 5. A cam follower 18 that engages with the cam 17 is attached to the lower part of the cutter member 14. A rod 16 for driving the cutter member 14 is connected via a link 37 to the cutter member 14 . The other end of the rod 16 is pivotally connected to a lever 23 which is rotatable about a shaft 25 attached to a frame 35. Spring 2 for rod 16
4 is engaged, and this spring 24 always urges the rod 16 in the direction of arrow A (FIG. 1), and always urges the cutter 36 of the cutter member 14 in the direction of the cutter 6 of the cutter wheel 5.

A shaft 28 is further attached to the frame 35, and a drive lever 34 and a cutting drive cam 2 are attached to this shaft 28.
9. Lever 3 equipped with pawl 32 for ratchet drive
3, the ratchet 31 and drive wheel 30 are installed. The shaft 28 is rotatable, and the drive lever 34 and the lever 33 are fixed to the shaft 28. The drive wheel 30 and the ratchet wheel 31 are rotatable together about the shaft 28. The claw 32 is
It is constantly biased towards the teeth of the ratchet foil 31. The teeth of the ratchet wheel 31 are oriented to mesh with the pawl 32 when rotated in the B direction. The ratchet wheel 31 and the drive wheel 30 are fixed to each other, and are rotatable only in the direction of arrow B (FIG. 1) by the action of the ratchet wheel 31 and the ratchet drive pawl 32. The timing belt 20 is engaged with the drive wheel 30, and as described above, this causes the sprocket wheel 7, cutter wheel 5, etc. to rotate intermittently. 21 and 22 are tension rollers of the timing belt 20. The cam 29 engages a cam follower 26 installed at the tip of the lever 23.

The operation of the lead wire cutting mechanism having the above configuration will be explained below. The radial tape component is supplied from a supply section (not shown) so that the lead wire 3 of the electronic component 2 is fitted into the cutter 6 and V-blade 6a of the cutter wheel 5, and is rotated in the direction of arrow F by index rotation of the sprocket wheel 7. The lead wire 3 of the electronic component 2 enters the V-blade 6a of the cutter 6 of the cutter foil 5 (FIG. 1). The indexing rotation of the sprocket 7 is achieved by rotating the drive lever 34 in the direction of arrow B by a drive means (not shown), thereby rotating the lever 33, and then rotating the lever 33 through the pawl 32 that engages with the teeth of the ratchet wheel 31 and the drive wheel 30. rotates, thereby rotationally driving the drive wheel 19 via the timing belt 20, and thus the sprocket wheel 7, the cam 17 and the cutter wheel 5.
rotates in the direction of arrow F. This rotation pushes the roller 10 of the lever 11 out of the recess 9 of the sprocket wheel 7, causing the sprocket wheel 7 to rotate. FIG. 1 shows an open state in which the cutter member 14 is separated from the cutter foil 5 at this time, and a gap is formed between them in order to introduce the lead wire 3 of the electronic component 2. This opening operation is performed by rotating the cam 17 together with the sprocket wheel 7 in the direction of arrow F.
By engaging the cam follower 18 of the cutter member 14 with the protrusion 17a of the cam 17, the cutter member 1
4 is pushed back in the direction away from the cutter foil 5.

When the drive lever 34 is further rotated in the direction of arrow B, the cam follower 18 is moved from the protrusion 17 of the cam 17.
a and enters the recess 17b, and the roller 10 enters the next recess 9 of the sprocket wheel 7 and is positioned (FIG. 2). At this time, the shape of the cam is adjusted so that the V blade 6a of the cutter 6 of the cutter wheel 5 is in a position opposite to the V blade 36a of the cutter 36 of the cutter member 14, and each cutter 6, 36 and each V blade 6
The positions of a and 36a are determined in advance. Lever 3
When cam 4 rotates to the end in the direction of arrow B, cam 1
7, the cutter member 14 is pulled in the direction of arrow A by the spring 24 via the rod 16, and the lead wire 3 is sandwiched between the V blades 6a, 36a of the cutters 6, 36. At this time, the spring force of the spring 24 is selected to be an appropriate strength corresponding to the strength of the lead wire so that there is no risk of the lead wire being cut by the V blades 6a and 36a. As a result, each lead wire 3 is held at the top of the V-blade 6a, 36a, which has been accurately positioned in advance. In this state, by gripping a portion of the lead wire 3 near the cutting position with a chuck (not shown), the chuck grips the lead wire in an accurately aligned state.

Next, as shown in FIG. 3, the drive lever 34 is reversely rotated in the direction of arrow D. D of drive lever 34
The directional movement causes the pawl 32 via the lever 33 to pass over one tooth of the ratchet wheel 31 and engage the next tooth. When the drive lever 34 further rotates in the direction of arrow D, the cam 29 pushes up the cam follower 26, causing the lever 23 to rotate in the direction of arrow E about the shaft 25. Therefore, the rod 16 is pulled in the direction of arrow C, and the cutter member 14 rotates in the direction of arrow C about the shaft 15 to cut the lead wire 3.

After this, if the drive lever 34 is rotated again in the direction of arrow B, the ratchet wheel 3
1, the timing belt 20 is fed by one pitch, and the cam follower 18 of the cutter member 14 again engages with the protrusion 17a of the cam 17 to open the space between the first and second cutters 6 and 36, thereby opening a new electronic belt. Return to the state for accepting parts (Fig. 2).

The cut and separated electronic components held by the chuck are transferred onto a printed circuit board (not shown), and lead wires are inserted into the insertion holes.

The forward and reverse rotation of the drive lever 34 is performed using a suitable reciprocating mechanism (not shown) provided outside the frame 35.

The number of lead wires of the radial tape component is not limited to three. However, even in the case where there are two lead wires, the mechanism of this embodiment can be applied as is by using two V blades 6a, 36a or using three in common.

In the above explanation, the cutting blades of the cutters 6 and 36 are both V-blade, but if only one of the cutting blades is a V-blade, positioning and cutting can be done in exactly the same way. be.

[Effect of idea]

As explained above, in the lead wire cutting mechanism for radial tape parts according to the present invention, the lead wire is once held by the V blade of the cutting cutter before cutting the lead wire, so the lead wire is bent. Even if the lead wire has deviated from the specified position to the extent that it cannot be corrected by the V-shaped lead wire gripping groove of the chuck claw, such as when there is variation in the pitch of the electronic component, the cutter The V-blade is sufficiently larger than the V-groove of the chuck claw, so it can be used without any special positioning mechanism.
Misalignment is corrected by the V-blade, which is positioned accurately in advance. Therefore, if the lead wire is held in this corrected state with a chuck, transferred onto a printed circuit board, and inserted into the insertion hole, misalignment between the through hole and the lead wire due to misalignment of the lead wire can be avoided. A smooth and reliable insertion operation is achieved.

[Brief explanation of the drawing]

1 to 3 are front views sequentially showing the operation of the embodiments of the present invention, FIG. 4 is a plan sectional view of the embodiment of the present invention, and FIG. 5 is an external appearance of an example of the radial tape component. It is a diagram. 2...Electronic component, 3...Lead wire, 5...Katsuta foil, 6...Katsuta, 6a, 36a...V
Blade, 14...Cut member, 16...Link, 17
...cam, 17a...protrusion, 17b...recess,
18... Cam follower, 24... Spring, 3
6...Katsuta.

Claims (1)

[Claims for Utility Model Registration] 1. A feeding means for intermittently feeding a radial tape component, a first cutter consisting of a plurality of V blades for receiving lead wires of the radial tape component, and the first cutter.
A second cutter having a cutting blade opposite to each V-blade of the cutter.
cutter and the first or second cutter when cutting the lead wire.
cutting drive means for cutting the lead wire by moving at least one of the cutters in the direction of the other cutter;
In a lead wire cutting mechanism for a radial tape component, the lead wire cutting mechanism for a radial tape component is provided with an opening means for separating two cutters from each other and providing a space between the first cutters, and the V of the first cutter is temporarily opened before each lead wire of the radial tape component is cut. Cutting of a radial tape component characterized by comprising a lead wire straightening and holding means that clamps the lead wire by urging the lead wire with a strength that does not cause the lead wire to be cut by the opposing cutting edges of the blade and the second cutter. Machine groove. 2 The lead wire correction and holding means includes first and second cutters each having a plurality of V blades facing each other corresponding to the number of lead wires of the electronic component, and the second cutter is arranged in the direction of the first cutter. The opening means includes a cam means driven by the feeding means, and the cam means opens the first and second cutters by the spring before the lead cutting operation is performed by the cutting drive means. Claim 1 of the Utility Model Registration Claim, characterized in that the second cutter is pushed back from the first cutter against the spring after the lead wire is cut. Cutting mechanism for radial tape parts.