JP5182916B2 - Fine wire feeder - Google Patents

Description

  The present invention relates to a thin wire supply device, and more particularly, to a thin wire supply device suitable for pulling out a magnet wire wound around a bobbin or the like in an electronic component assembling process, cutting it into a predetermined size, and mounting it on a component.

  FIG. 4 is a schematic view of a conventional thin wire supply device. One end of a thin wire 4b wound around the bobbin 4a is pulled out, passed through a guide portion 4c having a narrow hole slightly larger than the thin wire diameter, sent to a predetermined position by a thin wire feed 4d, and cut by a cutting portion 4e. Japanese Patent Application Laid-Open No. H10-228707 discloses a method for performing the above.

Japanese Patent Laid-Open No. 5-40211

  The purpose of the guide portion 4c is to guide the thin wire 4b to a predetermined position, and it is not desirable to make the diameter of the narrow hole too large. Therefore, the narrow hole is generally slightly larger than the diameter of the thin wire 4b, and when the thin wire 4b having no straightness is fed by the thin wire feed 4d, resistance is generated inside the thin hole. There was a drawback that it would be easily bent before the narrow hole.

  This causes a reduction in operating rate in production facilities.

  In general, the fine wire 4b is often bent due to the influence of being wound around the bobbin 4a or the like, and a slight curve may remain on the fine wire after cutting.

  In particular, in electronic parts and the like that have been remarkably miniaturized in recent years, it affects the mounting accuracy of thin wires in the assembling process and becomes a factor of yield reduction.

  Therefore, a technical problem of the present invention is to provide a mechanism for imparting straightness to a thin line in the thin line supply device, and to stably supply the thin line to a predetermined position.

A first invention for achieving the above object includes a bobbin portion that stores continuous thin wires, a feed portion that feeds out the thin wires drawn out from the bobbin portion, and a guide portion that positions the thin wires sent out from the feed portion. And a cutter unit that cuts and separates the thin line fed from the guide unit, and is arranged between the bobbin unit and the feed unit, and grips the continuous thin line from a direction perpendicular to the longitudinal direction. further comprising a stretching unit for the extending portion is constituted by a first chuck fixed, the second chuck to move in a direction parallel to the longitudinal direction of the continuous thin line, the first chat click moving the pre-Symbol second chucking click so that a distance between the second chuck and the first chuck is expanded while holding the thin line in the second chat phrase, the A thin wire feeding apparatus characterized by having a function of Ru is stretched line to the plastic region. The guide part has a small-diameter hole that fits into the thin wire.

  According to the first invention, in the thin wire supply device for sending the fine wire of the magnet wire to a predetermined position, the first chuck and the second chuck for gripping the thin wire are arranged, and the chuck is held in a state where the thin wire is gripped by both chucks. Move the chuck so that the distance between the wires increases by an amount set according to various conditions such as the material and diameter of the fine wire, and extend the fine wire existing between the chucks to the plastic region to improve straightness and slightly work hardening Therefore, the elastic limit can be improved, so that the thin wire can be stably supplied to a predetermined position.

  According to the second invention, in the thin wire feeding device for feeding the fine wire of the magnet wire to a predetermined position, the first feed roller and the second feed roller disposed in front of the first wire and various conditions such as the wire diameter By applying a difference in peripheral speed set by, the thin wire can be sent out while continuously extending to the plastic region, so that the elasticity limit due to straightness and slight work hardening can be improved and a certain amount of elongation can be given. It is possible to stably supply the thin line to a predetermined position.

  The fine line supply apparatus according to the best mode for carrying out the present invention will be described below with reference to examples.

Example 1
FIG. 1 is a side view of a thin wire supply device according to the first invention.

  As shown in FIG. 1, a guide portion 1c for positioning the fine wire 1b drawn from the bobbin 1a, a fine wire feed portion 1d for sequentially feeding the fine wire 1b, and a fine wire extending portion 1e in the vicinity of the fine wire feed portion 1d are sent out. A cutting portion 1f for cutting the fine wire 1b into a predetermined dimension is disposed.

  FIG. 2 is a detailed view of the thin line extending portion 1e of FIG.

  As shown in FIG. 2, a first chuck 2b and a second chuck 2e comprising a linear motion guide 2c and an actuator 2d are arranged at a distance T from the first chuck 2b behind the first chuck 2b. Has been.

  First, the thin wire 2a is gripped by the first chuck 2b. The first chuck 2b only grips the thin wire 2a and does not move in parallel with the thin wire supply direction. Next, the thin wire 2a is gripped by the second chuck 2e. The second chuck 2e is moved by the stroke t in the direction of increasing the distance from the first chuck 2b by the actuator 2d via the linear guide 2c, and the thin wire 2a is extended by both chucks.

  At this time, a tensile load is applied to the thin wire 2a existing between the first chuck 2b and the second chuck 2e, and plastic deformation and work hardening occur. Therefore, it becomes a straight fine line with an improved elastic limit.

  When a magnet wire having a diameter of 0.2 mm was used as the fine wire and the drawing process was performed with a displacement of 10 mm for every 120 mm of accumulated feed length of the fine wire, a processing strain of 8.3% was given. The straightness of the fine wire was ensured, the fine wire was not easily bent, and a necessary and sufficient processing strain could be applied without applying excessive stress to the fine wire.

(Example 2)
FIG. 3 is a side view of the thin wire supply device according to the second invention.

  As shown in FIG. 3, the thin wire 3b drawn from the bobbin 3a is passed through the first delivery roller 3c and the second delivery roller 3d arranged in front of the first delivery roller 3c, and is guided from the guide portion 3e to the cutting portion 3f.

  Both the first delivery roller 3c and the second delivery roller 3d have the same diameter, but the second delivery roller 3d is provided with a small-diameter pulley having a smaller number of teeth and driven by the same motor as a belt. Yes. Therefore, the peripheral speed of the second feed roller 3d is slightly higher than the peripheral speed of the first feed roller 3c.

  Moreover, each roller and the follower roller 3g are pressing down, without sliding the thin wire | line 3b.

  Since there is a difference in peripheral speed, the second feed roller 3d sends out more fine wires 4b.

  That is, a predetermined strain is always applied to the thin wire 3b existing between the two rollers to cause plastic deformation and work hardening. Accordingly, a straight thin wire with an improved elastic limit is continuously supplied.

  A magnet wire having a wire diameter of 0.2 mm was used as the thin wire, and the second feed roller 3d and the first feed roller 3c were configured to have a rotation ratio of 13:12. As a result, a processing strain of 8.3% was given to the thin wire. The straightness of the fine wire was ensured, the fine wire was not easily bent, and a necessary and sufficient processing strain could be applied without applying excessive stress to the fine wire.

  In this embodiment, a thin wire having a constant processing strain is supplied unless the pulley diameter is changed.

  In this embodiment, the rotation ratio of the first and second delivery rollers is determined by the pulley, but it can be substituted by individually setting the roller diameter and the rotational speed of the motor to be driven.

  As described above, according to the thin wire supply device of the present invention, straightness is given to the thin wire, and the elastic limit is improved by slight work hardening, so that it can be stably supplied to a predetermined position. .

The side view of the thin wire | line supply apparatus by 1st invention of this invention. The detail drawing of the thin wire | line extending | stretching part by 1st invention of this invention. The side view of the thin wire | line supply apparatus by 2nd invention of this invention. Schematic of the conventional fine wire supply apparatus.

Explanation of symbols

1a bobbin 1b fine wire 1c guide portion 1d fine wire feed portion 1e fine wire extension portion 1f cutting portion 2a fine wire 2b first chuck 2c linear motion guide 2d actuator 2e second chuck 3a bobbin 3b fine wire 3c first feed roller 3d second Feeding roller 3e Guide part 3f Cutting part 3g Driven roller 4a Bobbin 4b Fine wire 4c Guide part 4d Fine wire feed 4e Cutting part

Claims (1)

A bobbin for accommodating a continuous thin line, a feed section for feeding a fine line drawn from the bobbin portion, and a guide portion for positioning the thin line fed from the feed section, cut and separated fine wire fed out from said guide portion In a thin wire supply device comprising a cutter unit to
It further includes an extending part that is disposed between the bobbin part and the feed part and grips the continuous thin wire from a direction perpendicular to the longitudinal direction,
The extending portion is composed of a fixed first chuck and a second chuck that moves in a direction parallel to the longitudinal direction of the continuous thin wires,
Moving the pre-Symbol second chucking click so that a distance between the second chuck and the first chuck is expanded while holding the thin line in the second chucking click with the first chat click , fine lines feeding apparatus characterized by having a function of Ru is stretching the thin wire to plastic region.

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