JPS6225305Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lead wire cutting device used for various electronic components such as small resistors.

The object of the present invention is to provide a cutting device capable of cutting a long wire for a lead wire running at high speed into straight lead wires of a predetermined length at an extremely high speed.

When a long wire is cut at high speed using a cutter installed at a fixed position, the wire is cut across the wire.
The cutting tip of the strand is pressed against the cutter blade at high speed, causing distortion in the vicinity of the tip, and the lead wire obtained by cutting has the drawback that this distortion and length error occur. Such a lead wire is not suitable for transporting in the next process or for welding to the cap of the small resistor 3.

The present invention solves these drawbacks, and includes a pair of feed rollers that are arranged to continuously drive the long wire for the lead wire in a straight line at a set speed;
A slide board provided to reciprocate along the wire is provided on the same base, and a cutter lever provided to swing across the wire to cut the wire is pivoted to the slide board. The feed roller, the slide plate, and the cutter lever are arranged to be driven in synchronism, and the slide plate intermittently cuts the strands into straight lead wires of a set length while the slide plate is moving at approximately the same speed as the strands are traveling. It was established.

The structure of the present invention will be described below with reference to its embodiments. Reference numeral 1 indicates the entire lead wire cutting device according to the present invention. 2 is a lead wire fixed to both ends of the resistor 3, and 4 is a long bare wire for the lead wire. 5,5
are a pair of feed rollers installed on the base 6 so as to sandwich the strands 4 in the tangential direction and drive them at a set speed of, for example, about 40 meters/min. using a drive device (not shown). Reference numeral 7 denotes a slide plate provided to slidably engage the base 6 and move back and forth along the strands 4. Reference numeral 8 denotes a cutter lever formed into an L-shape, and is pivotally attached to the front side of the slide board 7 via a shaft 9. A blade 10 is appropriately fixed to the tip of a cutter lever 8. The blade 10 is provided so as to be able to cut across the strand 4. A split groove 11 is bored at the rear end of the cutter lever 8. A lateral groove 12 is carved in the lower surface of the rear end of the slide board 7 in the lateral direction. Reference numeral 13 denotes a driving vertical shaft which is pivoted below the base 6 and is driven by a drive device (not shown).A first cam disc 14, a second cam disc 15, and a third cam disc 16 are fixed to the vertical shaft 13. Set up A protrusion 17 is provided on the first cam disc 14 so as to protrude from the upper surface in a radial direction.
is provided so as to be slidably engaged with the lateral groove 12.
The lower surface of the second cam disc 15 has a V-shaped groove 18 in the radial direction.
A chevron-shaped protrusion 19 is provided on the upper surface of the third cam disk 16 in a radial direction so as to protrude from the concave groove 18 with an interval therebetween. Reference numeral 20 denotes a lever having arms a and b protruding laterally and formed in a U-shape as a whole, and is rotatably pivoted to a fixed part such as the base 6 by shafts 21 and 21. A protrusion 22 is provided on the arm a so as to protrude in the direction of the shaft 21, and the protrusion 22 is provided so as to be slidably engaged between the second and third cams. A drive rod 23 is attached to arm b.
protrudes in the direction of the shaft 21, and the drive rod 23 is inserted into the split groove 11.
It is slidably engaged with.

In the above mechanism, when the vertical shaft 13 is driven and rotated, the projections 17 of the first cam disk 14 slide in the horizontal grooves 12 and reciprocate along the strands 4 on the slide disk 7. This reciprocating stroke is determined by the deflection position of the projection 17, and the moving speed is determined by the number of rotations of the vertical shaft 13. The point at which the moving speed of the slide board 7 reaches its maximum is when the protrusion 17 comes to the right side of the slide board 7. When the second cam disk 15 and the third cam disk 16 rotate, the protrusion 22 comes into contact with the groove 18 and the protrusion 19, causing the tips of the arms a and b of the lever 20 to swing up and down, and the drive rod 23 is driven to swing up and down, thereby rotating the cutter lever 8.

Therefore, the cutter lever 8 reciprocates together with the slide plate 7 and is rotationally driven by the drive rod 23.

In the above-mentioned operating state, the vertical shaft 13 is rotatably driven on the slide board 7 so that the maximum speed of movement is somewhat faster than the running speed of the strand, and is provided so as to operate in synchronization with the feed roller 5. In this speed relationship, before the moving speed of the slide plate 7 reaches the maximum, it becomes equal to the strand traveling speed at a certain point, so the strand and the slide plate 7 travel together at this constant velocity point. The cutter lever 8 is set to operate and cut the strand 4 at . In this cutting state, the tip of the cut portion of the wire 4 does not push against the blade 10, so that no distortion occurs in the vicinity of the tip. Immediately after the cutting, the slide plate 4 precedes the cutting part of the wire 4, so the cutter lever 4 is set so as to rotate in the opposite direction and return during this advance stroke. Therefore, this return prevents the tip of the wire 4 from being bent.

By repeating the above operation, it becomes possible to cut the straight lead wire 2 with an unbent tip. The length of the lead wire 2 is determined based on the moving stroke and moving speed of the slide plate 7 and the feeding speed of the wire 4, for example, the diameter of the feed roller 5 and the diameter of the rotation locus of the protrusion 17 on the first cam plate 14. It is determined by appropriately setting the diameters in relation to each other, such as by making them the same diameter, and by appropriately setting the cutting timing.

As described above, the present device has an excellent effect in mass production of lead wires, in that it can cut the long wires for lead wires into straight lead wires of a predetermined length at an extremely high speed while the wires are running at high speed. It brings about

[Brief explanation of the drawing]

FIG. 1 is a plan view of one embodiment of the device of the present invention, FIG. 2 is a side view of the cutter lever of the device shown in FIG.
3 is a side view of the feed roller of the device shown in FIG. 1, FIG. 4 is a schematic perspective view of a portion of the device shown in FIG. 1,
FIG. 5 is a side view of a small resistor with lead wires attached. In the figure, reference numerals 1...the entire device, 2...
Lead wire, 4...Long bare wire for lead wire, 5...Feed roller, 6...Base, 7...Slide plate, 8
... cutter lever, 10 ... blade, 11 ... split groove, 12 ... horizontal groove, 13 ... vertical axis, 14 ... first
Cam disc, 15...Second cam disc, 16...Third cam disc, 17...Protrusion of the first cam disc, 18...V-shaped concave groove, 19...Chevron-shaped protrusion, 20...Lever , 22...
... Arm protrusion, 23... Drive rod.

Claims (1)

[Scope of Claim for Utility Model Registration] A base 6 includes a pair of feed rollers 5 that drive a long wire for lead wire to run continuously in a straight line at a set speed, and a slide plate 7 that slides back and forth parallel to the wire. A cutter lever 8, which is provided on the top and rotates a blade 10 across the running strand to cut the strand, is rotatably pivoted to the front side of the slide plate 7, and the arms a and b are moved in the lateral direction. A drive rod 23 is fixed to the tip of the arm b in the split groove 11 at the rear end of the cutter lever 8, with the lever 20 protruding from the top being rotatably attached to an appropriate fixed part.
On the other hand, on the driving vertical shaft 13, a first cam disk 14 having a protrusion 17 protruding from its upper surface, a second cam disk 15 with a V-shaped groove 18, and a chevron-shaped protrusion The third cam disc 16 with 19 is fixed, and the protrusion 17 of the first cam disc 14 is slidably engaged with the horizontal groove 12 carved on the lower surface of the rear end of the slide disc 7. The protrusion 22 at the tip of the arm a of the lever 20 is slidably engaged between the cam disks 15 and 16, and the rotation of the vertical shaft 13 is synchronized with the linear movement of the wire due to the rotation of the feed roller 5. , 1st cam board 1
The rotation of the lever 2 reciprocates the slide plate 7 by the rotation of the second and third cam plates.
A lead wire cutting device provided to rotate a cutter lever 8 in conjunction with the lead wire cutting device.