JPH08190826A - Electric wire stranding machine - Google Patents

Abstract

PURPOSE: To facilitate handling by giving a twist only to a tip part of a conductor or the like, facilitating aftertreatment of the conductor or the like, that is, crimping with a terminal metal fitting, and keeping the conductor or the like flexible as it is as a whole. CONSTITUTION: This electric wire stranding machine A is provided to give a twist to a conductor contained in an electric wire and a shielded wire. A rotary member 30 having a rorary end surface 35 to rotate the prescribed rotational center P as the center is provided. A guide member to guide a conductor or the like is arranged on the rotary end surface 35. Slits 35a, 35b, 35c and 35d are formed in the direction eccentric from the rotational center P on the rotary end surface 35. These slits 35a, 35b, 35c and 35d have prescribed width W and depth H, and are continued with each other in the rotational center P.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire twisting machine for twisting a terminal portion of a conductive wire from which an electric wire is stripped off.

[0002]

2. Description of the Related Art When connecting electric wires to each other or crimping a terminal fitting to the ends of the electric wires, generally, the coating of the end portions of the electric wires is stripped to expose a core wire which is a conductive wire. Then, the exposed core wires are connected to each other by welding, soldering, or the like, or the terminal fitting is crimped to the exposed core wires. By the way, normally, the core wire does not consist of one conductive wire, but is formed by bundling a large number of extremely fine conductive wires. Therefore, in general, the conductive wire whose coating has been stripped is twisted and then processed. An apparatus for twisting a core wire is disclosed in Japanese Patent Laid-Open No. 57-
There are those disclosed in Japanese Patent No. 166808, Japanese Utility Model Laid-Open No. 62-56241 and Japanese Utility Model Laid-Open No. 5-41327.

First, in the wire end treatment device disclosed in Japanese Patent Application Laid-Open No. 57-166808, a cutter is provided which bites in the radial direction of the wire and is rotatable in the circumferential direction of the wire. When the cutter rotates, the coating is cut and peeled off, and the core wire of the portion where the coating is peeled off is twisted and twisted.

Further, in the wire twisting machine disclosed in Japanese Utility Model Laid-Open No. 62-56241, a wire holding piece capable of holding the core wire is provided. Then, the core wire is sandwiched by the wire sandwiching piece, and the core wire can be twisted by rotating the wire sandwiching piece by a motor. Further, in the wire end twisting machine disclosed in Japanese Utility Model Laid-Open No. 5-41327, a clamp receiving piece and a clamp pressing piece for holding the core wire are provided. The core wire can be twisted by rotating the core wire while sandwiching the core wire between the clamp receiving piece and the clamp pressing piece.

In each of the above-mentioned devices, not only the very tip of the core wire but also the whole core wire in the part where the coating is peeled off can be twisted.

[0006]

By the way, depending on the type of electric wire and the treatment of its end, it may be necessary to remove the coating for a long time (for example, about 10 cm). Moreover, in such a case, when the diameter of the electric wire is large (for example, a so-called HDEB wire), twisting the entire exposed core wire makes the core wire itself very hard. Therefore, it becomes very difficult to handle when the core wire is bent or processed.

Further, referring to FIG. 6, in the case of a so-called shielded electric wire 1, a shielded wire 3 arranged around a core wire 2 is folded back at a boundary portion 5 with a sheath 4, and its terminal portion 3a is a terminal fitting. 6 may be crimped integrally with another splice electric wire 7. Even in such a case, since it is difficult to crimp with the terminal metal fitting 6 if the shielded wire 3 is separated, the shielded wire 3 is twisted. However, when the entire exposed shielded wire 3 is twisted and folded back, the boundary portion 5 may have a corner, and the corner of the shielded wire 3 may break the coating of the core wire 2.

In order to avoid the above inconvenience,
It suffices to twist not only the exposed core wire or the entire area of the shielded wire 3 but only the tip portion. This is because by twisting only the tip portion, it is possible to prevent the wire from coming loose, and to keep the exposed wire as a whole supple and easy to handle without hardening it. Therefore, an object of the present invention is to provide an electric wire twisting machine capable of twisting only the tip portion of a conductive wire.

[0009]

In order to achieve the object of the present invention, a wire twisting machine according to claim 1 has a rotating member having a rotating end face rotated about a predetermined rotation center, and the rotating member. Formed on the rotating end face in a state of being eccentric with respect to the center, engaging recesses capable of engaging the tip ends of the plurality of conductive wires to be twisted, and a wire insertion path for inserting the conductive wires are formed, A guide member for guiding the tip of the electric wire to the engaging recess is provided.

According to this structure, the plurality of conductive wires exposed by peeling off the coating of the electric wire are inserted into the electric wire insertion path of the guide member. Thereby, the conductive wire can be guided from the tip to the rotating end surface of the rotating member that rotates. The tip end of the conductive wire guided to the rotating end face is inserted into and engaged with the engaging recess. Since this engaging concave portion rotates together with the rotating member,
The tip of the conductive wire inserted in the engaging recess is displaced in the rotation direction about the rotation center of the rotation end face. Thereby, twisting can be applied in a state where the conductive wires are entangled with each other. Moreover, since only the tip of the conductive wire is inserted into the engaging recess, the conductive wire comes out of the engaging recess when the rotating end face rotates by a predetermined angle. This allows
The engagement between the conductive wire and the engagement recess is released.

To achieve the object of the present invention, an electric wire twisting machine according to a second aspect is the electric wire twisting machine according to the first aspect, wherein the engaging recess includes a slit extending in a radial direction from the rotation center, This slit is characterized by being formed substantially symmetrically with respect to the center of rotation and being continuous at the center of rotation. According to this structure, the same operation as the invention according to claim 1 is achieved. In addition, the conductive wire inserted in the slit moves around the rotation center of the rotation end face on an arc whose rotation radius is the distance from the rotation center to the position inserted in the slit. As a result, the conductive wires located at the same distance from the center of rotation are entangled with each other. As a result, if the conductive wires move anisotropically without moving on a predetermined radius of gyration, the conductive wires may be abnormally entangled with each other to form a mass. Then, there is no such possibility, and good twist can be formed around the center of rotation. Moreover, the entangled conductive wire has a smaller outer diameter around the center of rotation of the rotating end face. If the outer diameter of the conductive wire is smaller than the width of the slit, it will not be twisted any more.

In order to achieve the object of the present invention, an electric wire twisting machine according to a third aspect is the electric wire twisting machine according to the first aspect, wherein a plurality of the engaging recesses are provided radially with respect to the rotation center. It is characterized by including small holes. According to this structure, the same operation as the invention according to claim 1 is achieved. In addition, the conductive wire inserted in the small hole is
It moves on an arc centered on the rotation center of the rotation end face and having a radius of rotation as the distance from the rotation center to the small hole. As a result, the conductive wires located at the same distance from the center of rotation are entangled with each other. As a result, if the conductive wires move anisotropically without moving on a predetermined radius of gyration, the conductive wires may be abnormally entangled with each other to form a mass. Then, there is no such possibility, and good twist can be formed around the center of rotation. Moreover, the conductive wire inserted in the small hole will come out of the small hole when moved by a predetermined amount. Therefore, after forming a predetermined twist, no further twist is applied.

In order to achieve the object of the present invention, an electric wire twisting machine according to a fourth aspect is the electric wire twisting machine according to any one of the first to third aspects, wherein the guide member is attached to the tip of the rotating end surface. It is characterized in that it includes a rotating body which rotates integrally with the rotating member, and the electric wire insertion hole is formed along the rotation axis direction of the rotating body.

According to this structure, the same operation as that of the invention according to any one of claims 1 to 3 is achieved. In addition, the wire insertion hole is formed along the axial direction of the rotating body, so if the conductive wire is inserted into the wire insertion path, the conductive wire will be bundled and held in a straight state, and from the tip to the rotating end surface. Can be guided to.

[0015]

Embodiments will be described in detail below with reference to the accompanying drawings showing embodiments. FIG. 1 is an external perspective view of an electric wire twisting machine A according to an embodiment of the present invention. With reference to FIG. 1, this electric wire twisting machine A applies a twist to the tips of a plurality of ultra-fine conductive wires (including core wires and shield wires; hereinafter referred to as “conductive wires”) that are constituent elements of an electric wire. It is for. The electric wire twisting machine A is attached to a bracket 10 fixed on a predetermined work table C, an electric motor 20 attached to the bracket 10, and an output shaft (not shown) of the electric motor 20. The rotating member 30 rotated by the motor 20 and the guide member 40 attached to the rotating member 30 and guiding the conductive wire to the rotating member 30 are provided.

The bracket 10 is composed of an angle member formed by bending a flat plate at a substantially right angle. The bracket 10 has a fixing portion 11 that is fastened on the workbench C and a mounting portion 12 for mounting the electric motor 20.
The fixing portion 11 is appropriately provided with an insertion hole through which the fastening bolt B3 is inserted. Then, the bolt B3 is inserted into this insertion hole and the nut N1 is applied,
The fixed portion 11 is fastened to the workbench C.

On the other hand, the mounting portion 12 is provided with four insertion holes into which the bolts B3 for mounting the electric motor 20 are inserted. The bolt B3 is inserted from the electric motor 20 side into a mounting hole formed in the electric motor 20, and penetrates the insertion hole. The electric motor 20 is fixed by hooking the nut N1 on the bolt B3.

The electric motor 20 has a motor body 21 and a gear box 22. The rotation of the rotation shaft (not shown) of the motor body 21 is decelerated via the gearbox 22. As a result, the rotation of the rotation shaft of the motor body 21 as an input is output as the rotation of the output shaft provided in the gear box 22. Rotating member 30
Has a cylindrical shape and is mounted coaxially with the output shaft. This attachment is performed by the set bolt B1.

FIG. 2 is a sectional view of the rotating member 30 and the guide member 40, taken along a plane including the axis of the set bolt B1. With reference to FIG. 2, the rotary member 30 includes
A shaft insertion hole 32 having a predetermined depth is formed from the center of the one end face 31 along the center axis. The output shaft 22a is inserted into the shaft insertion hole 32. A screw hole 34 is formed in the radial direction from the outer peripheral surface portion 33 of the rotating member 30. Then, the rotating member 30 is fixed to the output shaft 22a by screwing the set bolt B1 into the screw hole 34.

The other end surface of the rotating member 30 is a rotation end surface 35 which is rotated about the rotation center of the output shaft 22a.
Is composed. FIG. 3 shows a plan view of the rotating end surface 35. Referring to FIGS. 2 and 3, slits 35a, 35b, 35c and 35d are formed in this rotation end face 35 in a state of extending from the rotation center P in an eccentric direction. These slits 35a, 35b, 35c and 35d have a predetermined width W and a predetermined depth H. In addition, the slits 35a and 35b and the slit 35
c and 35d are formed to extend symmetrically with respect to the rotation center P, respectively. And these slits 35
a, 35b, 35c and 35d are continuous at the rotation center P. Therefore, the rotation end surface 35 is in a state in which a substantially cross-shaped groove is formed. In FIG. 3, reference numerals 36a, 36b, 36c and 36d denote through holes into which the bolt B2 for attaching the guide member 40 to the rotating member 30 is inserted.

FIG. 4 is a cross-sectional view of the rotary member 30 and the guide member 40 taken along a plane including the axis of the bolt B2, and shows a cross section that is out of phase by 45 ° with respect to the cross section shown in FIG. . Referring to FIG. 4, one end surface 3 of the rotating member 30
1 to the rotating end surface 35, through holes 36a and 36c (through holes 36b and 36d) through which the bolt B2 is inserted.
(Not shown) is formed. These through holes 36a,
A seat portion 31a for housing the head of the bolt B2 when the bolt B2 is tightened is formed on the one end surface 31 side of 36b, 36c, and 36d.

On the other hand, the one end face 41 of the guide member 40 is provided with screw holes 41a into which the bolts B2 are screwed in at four positions corresponding to the above four through holes. Then, the bolt B2 is inserted into the through holes 36a, 36b, 36c and 36d and tightened, whereby the one end surface 4 of the guide member 40 is
1 and the rotating end surface 35 of the rotating member 30 face each other,
The guide member 40 is fastened to the rotating member 30.

The guide member 40 has a cylindrical shape and is mounted coaxially with the rotating member 30. Therefore, the output shaft 22a, the rotating member 30, and the guide member 40 rotate integrally about the same axis (that is, about the rotation center P). 2 and 4, the guide member 40 is formed with an insertion passage 43 through which a conductive wire to be twisted is inserted. The insertion passage 43 is formed so as to penetrate from the one end face 41 to the other end face 42 of the guide member 40 along the central axis thereof, and has openings at the one end face 41 and the other end face 42, respectively. The opening on the other end surface 42 side of the insertion passage 43 is formed to have a larger diameter than the opening on the one end surface 41 side.
The inner diameter of the insertion passage 43 is gradually reduced from the other end surface 42 to the predetermined position Q1 on the one end surface 41 side, and is formed in a so-called funnel shape. Further, the inner diameter of the insertion passage 43 in the portion extending from the predetermined position Q1 to the one end face 41 is formed to be constant.

Next, how to use the electric wire twisting machine A will be described together with its function and effect. Power is supplied to the electric motor 20 to rotate the rotating member 30 and the guide member 40. The conductive wire is exposed by peeling off the covering portion of the electric wire. The conductive wire is inserted into the insertion passage 43 from the other end surface 42 side of the guide member 40. When the conductive wire is inserted into the insertion passage 43, the insertion passage 43
With the gradually reduced diameter portion of, the separated conductive wires can be bundled. The conductive wire can be held in a bundled state by the portion having a constant inner diameter following the gradually reduced diameter portion. Therefore, by inserting the conductive wire along the insertion path 43, the conductive wire can be guided from the tip thereof to the rotating end surface 35 of the rotating member 30 in a bundled state.

With reference to FIG. 3, the conductive wire guided by the rotating end surface 35 is inserted into the slits 35 a, 35 b, 35 c and 35 d. These slits 35a, 35b, 3
Since 5c and 35d have a predetermined depth H, only the tips of the conductive wires are 35a, 35b, 35c and 35d.
Will be engaged. Then, slits 35a, 35b, 35c and 3
The tip of the conductive wire inserted in 5d is moved in the rotation direction about the rotation center P of the rotation end surface 35. Thereby, twisting can be applied in a state where the conductive wires are entangled with each other. In addition, the slits 35a, 35b,
Since only the tips of the conductive wires are inserted into 35c and 35d, the tips of the conductive wires are slits 35a, 35b, 35c when the rotating end surface 35 is rotated by a predetermined angle.
And get out of 35d. Thereby, it is possible to apply twist only to the tip of the conductive wire. As a result, the terminal fitting can be easily crimped onto the tip of the conductive wire, and the entire exposed conductive wire can be kept in a supple and easy-to-handle state.

In addition, according to this embodiment, the following operational effects are exhibited. First, by twisting the conductive wire,
The outer diameter of the tip of the conductive wire is reduced while being brought closer to the rotation center P side. On the other hand, the slits 35a, 35
The widths of b, 35c and 35d are formed to have a predetermined width W. Therefore, if the outer diameter of the tip of the conductive wire becomes smaller than this width W, the tip will enter the slits 35a, 35b, 35c, and 35d around the rotation center P. As a result, the conductive wire is not twisted any more, and it is possible to prevent the tip portion of the conductive wire from becoming too hard or broken due to excessive twisting.

Further, 35a, 35b, 35c are formed in the slits.
And the conductive wires inserted in 35d are centered on the rotation center P, and the slits 35a, 35b,
It moves on an arc whose radius of gyration is the distance to the position inserted into 35c and 35d. Moreover, the slits 35a,
35b, 35c and 35d are continuous at the rotation center P of the rotation end face 35, and form a substantially cross-shaped groove on the rotation end face 35. Therefore, the conductive wires located at the same distance from the rotation center P are entangled with each other. As a result, it is possible to form a good twist around the rotation center P.

Further, since the insertion passage 43 is formed along the central axis direction of the guide member 40, it is possible to guide the conductive wire to the rotary end face while keeping the conductive wire straight. Therefore, there is an advantage that when conducting twisting, the conductive wire is not bent and the twist can be formed more favorably. Further, the present invention is not limited to the above embodiment, and the following modified examples are possible.

FIG. 5 is a plan view showing a rotating end surface of the rotating member 30 according to the modification. Referring to FIG. 5, this modified example is different from the above-described embodiment in that in the above-described embodiment, slits 35a, for moving the conductive wire around the rotation center P are provided.
35b, 35c, and 35d are formed, in the present modification, a plurality of small holes 38 are formed radially with respect to the rotation center P.
That is the point. The rest of the configuration is the same as that of the above-mentioned embodiment, so its explanation is omitted.

The small hole 38 has a substantially circular shape and has a predetermined depth. Then, when the conductive wire is guided to the rotating end surface 35, the tip end of the conductive wire is inserted into and engaged with each small hole 38. Each conductive wire is moved in the direction of rotation about the rotation center P of the rotation end surface 35 by each small hole 38. Thereby, twisting can be applied in a state where the conductive wires are entangled with each other.

Moreover, since only the tip of the conductive wire is inserted into the small hole 38, the tip of the conductive wire comes out of the small hole 38 when the rotating end face 35 is rotated by a predetermined angle. Thereby, it is possible to apply twist only to the tip of the conductive wire. Also, by twisting the tip,
The tip has a reduced length. As a result, when twisted in a certain state, the conductive wire cannot engage with the small hole 38. As a result, the conductive wire is not twisted any more, and it is possible to prevent the tip portion of the conductive wire from becoming too hard or broken due to excessive twisting.

In addition, in this modified example, since the plurality of small holes 38 are provided radially with respect to the rotation center P, the conductive wire inserted in each small hole 38 has the rotation center P as the center. It moves on an arc whose radius of gyration is the distance from P to each small hole 38. Therefore, the conductive wires located at the same distance from the rotation center P are entangled with each other. As a result, it is possible to form a good twist around the rotation center P.

As described above, also in this modification, the same effect as that of the above-described embodiment can be obtained. It should be noted that in the above-described embodiments and modifications, the slit formed in the rotary end surface 35 does not necessarily have to be formed in a cross shape, and can be provided so as to be point-symmetric with respect to the rotation center P. That is, it may be formed in a substantially one-letter shape around the rotation center P, or may be formed symmetrically in three directions around the rotation center P. Further, the slits may be provided radially with respect to the rotation center P. Further, the small holes 38 may not be formed in a clear radial pattern with respect to the rotation center P, but may be provided at four positions vertically and horizontally around the rotation center P. In short, it suffices that the rotating end surface 35 of the rotating member 30 is formed with an engaging recess in which the tip of the conductive wire can be engaged, in a direction eccentric to the rotation center P.

[0034]

According to the invention of claim 1, the conductive wire can be twisted by engaging and rotating the conductive wire in the engaging recess formed in the rotating end surface. Moreover, since only the tip of the conductive wire is inserted into and engaged with the engaging recess, the conductive wire comes out of the engaging recess when the engaged conductive wire is rotated by a predetermined angle. With this, only the tip of the conductive wire can be twisted, and after twisting in a predetermined state, the tip is not twisted any more. As a result, the terminal fitting can be easily crimped to the tip of the conductive wire, and the entire exposed conductive wire can be held in a supple and easy-to-handle state.

According to the invention of claim 2, the same effect as that of the invention of claim 1 can be obtained. In addition, since the conductive wire inserted in the slit can form a good twist around the center of rotation of the rotating end face, the portion where the twist is formed can be processed, for example, by crimping the terminal fitting. It will be easier. According to the invention of claim 3, the same effect as that of the invention of claim 1 can be obtained. In addition, since the conductive wire inserted into the small hole can form a good twist around the center of rotation of the rotating end face, the portion where the twist is formed can be treated, for example, crimping the terminal metal fittings. It will be easier.

According to the invention of claim 4, the same effect as that of the invention of any one of claims 1 to 3 can be obtained. In addition, since the conductive wire is twisted while being held in a straight state, the twist can be formed in a better state.

[Brief description of drawings]

FIG. 1 is a perspective view of an electric wire twisting machine according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the rotating member and the guide member taken along a plane including the axis of the set bolt.

FIG. 3 is a plan view of a rotating end surface of a rotating member.

FIG. 4 is a cross-sectional view of the rotating member and the guide member taken along a plane including the axis of the bolt.

FIG. 5 is a plan view of a rotary end surface according to a modification.

FIG. 6 is a side view showing a state in which a terminal fitting is crimped onto the shield wire of the shielded electric wire.

[Explanation of symbols]

 A Wire twisting machine P Rotation center 22a Output shaft 30 Rotating member 35 Rotating end face 35a Slit 35b Slit 35c Slit 35d Slit 40 Guide member 43 Inserting passage

Claims (4)

[Claims] 1. A rotating member having a rotating end face rotated about a predetermined rotation center, and a plurality of conductive wires formed on the rotating end face in a state of being eccentric with respect to the rotation center and about to be twisted. And a guide member for forming a wire insertion path for inserting a conductive wire and guiding the tip of the inserted wire into the engagement recess. Electric wire twisting machine. 2. The wire twisting machine according to claim 1, wherein the engaging recess includes a slit extending in a radial direction from the rotation center, and the slit is formed substantially symmetrically with respect to the rotation center, and An electric wire twisting machine characterized by being continuous at the center of rotation. 3. The electric wire twisting machine according to claim 1, wherein the engaging recess includes a plurality of small holes radially provided with respect to the rotation center. 4. The electric wire twisting machine according to any one of claims 1 to 3, wherein the guide member is attached to the end of the rotary end surface,
An electric wire twisting machine, comprising a rotating body which rotates integrally with a rotating member, and wherein the electric wire inserting hole is formed along a rotation axis direction of the rotating body.