JPH09102695A - Transfer mechanism for formed lead wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer mechanism for a formed lead wire capable of easily performing the forming of a lead wire and transfer to a rotating drum without requiring auxiliary materials such as paper tape. SOLUTION: When a straight lead wire 4 is fed to a forming die 4, a cutting guide 7 cuts the lead wire 4 to a predetermined length, thereafter, a pusher 6 pushes the central part of this lead wire in a horizontal direction and pushes it out from an opening 3 of the forming die, and then the lead wire is formed to an U-shape. A U-shaped lead wire pushed out by the pusher 6 is held in an inward groove 10 of a holder 9 by its spring force. When the holder 9 descends, both the end portions of the U-shaped lead wire are bent inwardly by a guide face 13a of a holding tooth 13 of the rotating drum 11, moreover, the holder 9 is raised in a state where the lead wire is fitted to a fitting face of the lead wire, and the lead wire can be transferred from the holder 9 to the holding tooth 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer mechanism for a molded lead wire, and more particularly to a mechanism for transferring a U-shaped lead wire to a rotary drum.

[0002]

2. Description of the Related Art In the case of automatically assembling a bead inductor as shown in FIGS. 1A and 1B, first, U-shaped lead wires are placed at a constant interval on a carrier medium such as perforated paper tape. Hold open and transport intermittently. Then, the carrier medium is fed from the tangential direction to the rotating drum rotating at a constant speed, and the peripheral speed of the rotating drum and the feeding speed of the medium are synchronized, so that the lead wire held on the medium is moved to the rotating drum. It is designed to be transferred to the holding teeth formed on the outer circumference. The lead wire transferred to the rotating drum is inserted into a bead inductor held by another rotating drum, and then taped.

[0003]

However, in the case of the transfer mechanism as described above, since the lead wire is formed into a U-shape, it is conveyed to the rotary drum at a constant interval.
It is necessary to use a medium such as perforated paper tape, and since this medium does not produce any additional value, it has been a cause of cost increase. Further, a mechanism for feeding the medium in synchronism with the rotating drum and a mechanism for pulling out the lead wire from the medium on the rotating drum and transferring it to the holding teeth of the rotating drum are required, which makes the apparatus very complicated. Was there.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a forming lead wire transfer mechanism which does not require auxiliary materials such as paper tape and can easily form a lead wire and transfer the lead wire to a rotary drum. To do.

[0005]

In order to achieve the above object, the transfer mechanism of the molding lead wire of the present invention is capable of moving horizontally in the molding die to which a straight lead wire is supplied and in the molding die. The pusher for forming the lead wire into a U-shape by pushing the central portion of the straight lead wire in the horizontal direction and pushing it out from the opening of the molding die and the pusher that is vertically movable in front of the pusher. A holder having an inward groove for holding both ends of the U-shaped lead wire extruded by the elastic force, and a guide surface that is arranged rotatably below the holder about a horizontal axis and is inclined inward. And a rotary drum having a holding tooth having a pair of fitting surfaces for holding the outer surfaces of both ends of the lead wire at the bottom of the guide surface, and the distance between the fitting surfaces is the inward groove of the holder. Set narrower than When the holder is lowered, both ends of the lead wire held in the inward groove are bent inward while sliding on the guide surface, and the holder is raised with the lead wire fitted in the fitting surface. As a result, the lead wire is transferred from the holder to the holding tooth.

When a straight lead wire is supplied to the molding die, the pusher advances to form a U-shape with the molding die. The U-shaped lead wire is pushed out from the opening of the mold by the pusher and inserted into the inward groove of the holder. Since the U-shaped lead wire has the habit of opening both ends outward due to elasticity (spring back), the lead wire is held in the inward groove of the holder by the elasticity of both ends. The pusher loses contact with the lead wire and retracts as it is. Next, when the holder holding the lead wire descends and approaches the holding teeth of the rotary drum, first, both ends of the lead wire come into contact with the guide surface and are slid inward while sliding on the guide surface. When the holder is further lowered, both ends of the lead wire are fitted into the fitting surface. Since the space between the mating surfaces is smaller than the space between the inward grooves of the holder, the lead wires are out of the inward grooves when they are fitted into the mating surface. The lead wire is elastically held by the rotating drum.

It is necessary to synchronize the forward / backward movement of the pusher and the vertical movement of the holder so that the holder does not descend while the pusher is in the forward movement. Further, in order to transfer the lead wire held by the holder to the holding teeth of the rotary drum, it is necessary to synchronize the rotation of the rotary drum and the vertical movement of the holder. The rotation of the rotary drum may be continuous rotation or intermittent rotation. In the case of continuous rotation, the vertical movement speed of the holder needs to be higher than the rotation speed of the rotary drum.

[0008]

2 to 4 show an example of a transfer mechanism according to the present invention. Reference numeral 1 denotes a molding die, and a pair of dies 2 are provided at a front end portion thereof so as to project, and an opening 3 is provided between the dies 2. An R surface 2a is formed on the opening side of the die 2. Straight leads 4 are fed horizontally along the back surface of the die 2.

A pusher 6 which is driven in the front-rear direction by a driving means 5 such as a cylinder is arranged on the upper surface of the mold 1. The tip end of the pusher 6 is formed narrower than the width of the opening 3, and a concave groove 6a for positioning the lead wire 4 is formed in the width direction on the tip end surface thereof. A pair of cutting guides 7 are arranged on both sides of the mold 1, and these cutting guides 7 are movable back and forth relative to the mold 1.

In front of the mold 1, particularly in front of the opening 3,
A holder 9 is arranged which is driven in the vertical direction by a driving means 8 such as a cylinder. A dovetail-shaped inward groove 10 is provided on the lower surface of the holder 9. The opening width W of the inward groove 10 is slightly wider than the width dimension of the tip portion of the pusher 6.

Below the holder 9, a rotary drum 11 is disposed which continuously rotates in one direction around a horizontal shaft 12. The rotary drum 11 has a pair of holding teeth 1
3, 13 are fixed with a constant interval in the front-rear direction with the body portion 15 in between, and the interval between the holding teeth 13, 13 is larger than the thickness of the holder 9 in the front-rear direction. Therefore, the holder 9
When is lowered, it can enter between the holding teeth 13, 13. On both side surfaces of the holding tooth 13, as shown in FIG.
An involute-shaped guide surface 13a and a fitting surface 13b perpendicular to the bottom thereof are formed, and an interval D between the fitting surfaces 13b of adjacent holding teeth 13 is smaller than the opening width W of the inward groove 10 of the holder 9. . Intermediate teeth 14 smaller than the holding teeth 13 are formed between the holding teeth 13. As shown by the broken line in FIG. 3, a recessed groove 13c into which the lead wire 4 fits may be provided on the fitting surface 13b.

Next, the operation of the transfer mechanism having the above structure will be described. First, a method of forming the lead wire 4 into a U shape will be described with reference to FIG. First, a straight lead wire 4 is fed along the rear surface of the die 2 of the mold 1 as shown in FIG. Next, as shown in FIG. 4B, the cutting guide 7 is slid forward relative to the mold 1 to simultaneously cut the front and rear ends of the lead wire 4 between the cutting guide 7 and the die 2. , A lead wire 4 having a constant length is obtained. In this case, the mold 1 may be fixed at a fixed position and the cutting guide 7 may be advanced, or the cutting guide 7 may be fixed at a fixed position and the mold 1 may be retracted. Next, the pusher 6 is advanced toward the opening 3, and the central portion of the straight lead wire 4 cut into a certain length is pushed forward as shown in FIG. 4C to push the pusher 6 and the die 2 together. To form a U-shape. When the pusher 6 is further advanced, the U-shaped lead wire 4 comes out forward from the opening 3 and is inserted into the inward groove 10 of the holder 9 (see FIG. 4D). At this time, since the lead wire 4 has outward elasticity due to the spring back,
The lead wire 4 is stably held by the holder 9. Pusher 6
Is retracted, the lead wire 4 is pushed to the pusher 6 at this point.
Since it is not crimped to, the pusher 6 only retracts with the lead wire 4 left in the holder 9.

Next, the transfer operation from the holder 9 to the rotary drum 11 will be described with reference to FIG. Rotating drum 1
When 1 reaches the position shown in FIG. 3, the holder 9 starts descending. At the position A in FIG. 3, both ends of the lead wire 4 held in the inward groove 10 are formed on the guide surface 13 a of the holding tooth 13.
And both ends of the lead wire 4 are slid inward while sliding on the guide surface 13a as the holder 9 descends. Further, when the holder 9 descends and the position B in FIG. 3, that is, when the lead wire 4 is fitted into the fitting surface 13b, both ends of the lead wire 4 are out of the inward groove 10, and the lead wire 4 is It is held on the fitting surface 13b by elasticity. At this stage,
When the holder 9 is raised, only the holder 9 is raised and the lead wire 4 remains on the holding teeth 13 of the rotary drum 11. In this way, the lead wire transfer operation is completed.

In the above embodiment, the drive sources for the pusher, the holder, and the rotary drum are separately provided, and the drive sources are synchronized with each other. However, the present invention is not limited to this, and the pusher and the holder are provided by one drive source. And the rotating drum may be driven. In this case, the cam,
It is necessary to separately provide a synchronization mechanism such as a link or gear. Further, the rotary drum is not limited to one that continuously rotates, but may be one that intermittently rotates at a constant pitch interval.

[0015]

As is apparent from the above description, according to the present invention, the lead wire is molded by the pusher, transferred to the holder, and further directly transferred to the holding teeth of the rotary drum. The cost can be reduced because it is not necessary to use a secondary material such as a conventional paper tape. Further, since it is not necessary to provide a mechanism for pulling out the lead wire from the medium on the rotary drum, the structure of the rotary drum itself can be simplified.
Further, the transfer of the lead wire uses the elasticity of the lead wire itself, and thus does not require a complicated holding mechanism and is a simple mechanism. Therefore, reliability against failure is high,
Inexpensive configuration.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a bead inductor.

FIG. 2 is an overall perspective view of a transfer mechanism according to the present invention.

FIG. 3 is a front view of a main part of a transfer mechanism according to the present invention.

FIG. 4 is a plan view showing a method of molding a lead wire.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Molding die 4 Lead wire 6 Pusher 7 Cutting guide 9 Holder 10 Inward groove 11 Rotating drum 13 Holding tooth 13a Guide surface 13b Fitting surface

Claims (1)

[Claims] 1. A molding die to which a straight lead wire is supplied, and a horizontally movable movable die is arranged in the molding die. The central portion of the straight lead wire is pushed horizontally to be pushed out from an opening of the molding die. Thus, a pusher for forming the lead wire into a U-shape, and a holder having an inward groove that is arranged in front of the pusher so as to be vertically movable and that holds both ends of the U-shaped lead wire pushed out by the pusher by its elasticity. , A pair of mating surfaces that are arranged below the holder so as to be rotatable about a horizontal axis and that form a pair of inwardly inclined guide surfaces and a bottom surface of the guide surface that holds the outer surfaces of both ends of the lead wire. And a rotary drum having a holding tooth with a gap between the fitting surfaces is set to be narrower than a gap between the inward grooves of the holder, and when the holder descends, both ends of the lead wire retained in the inward groove. The guide surface Transferring the molded lead wire, characterized in that the lead wire is transferred from the holder to the holding teeth by being bent inward while moving and raising the holder with the lead wire fitted in the fitting surface. mechanism.