JP2001326052A - Attachment of wire wrapping tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment of a wire wrapping tool, in which the winding end portion does not protrude in the side direction to become a protrusion in a horn shape. SOLUTION: A bit 1 and a sleeve 2 mounted on the bit constitute the tool attachment. A recess 3 is formed at the top end of the bit, and a cut portion 5 is formed at a part of the circumference wall 4 forming the recess 3. The lower part of the rising portion at both sides of the cut portion 5 is formed a widening slant to upward 5a, 5a and the upper part is formed into mutually parallel and vertically straight line portions 5b, 5b. The height of the circumference wall 4 is made three times the diameter of the uncovered portion of top end of the lead wire. A terminal pin insertion hole 6 is formed in the recess 3 of the top end of the bit 1, and a lead insertion groove 7 is formed inside the cut portion 5. A pair of locking groove 9, 9 are formed at the top end of the sleeve 2, which lock the extended uncovered portion of the lead of which top end is inserted in the lead insertion groove 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attachment for a wire wrapping tool which is mainly used for wrapping a lead wire at a wiring end around a terminal pin of a terminal block and electrically connecting the lead wire.

[0002]

2. Description of the Related Art At present, an attachment in a wire wrapping tool of this type generally includes a bit that is rotationally driven by a tool body of the wire wrapping tool, a sheath that is externally mounted on the bit, and that is attached to the tool body. And a sleeve that is kept in a non-rotating state even during rotation.

[0003] The bit has a recess at its tip, and a pin insertion hole formed in the recess along the length direction of the bit, the pin insertion hole for inserting a terminal pin from the recess side. The bit is formed on its outer peripheral portion with a lead wire insertion groove along the length direction of the bit for inserting a lead wire from the concave side, and a peripheral wall rising around the concave portion. A cut-out portion that opens to the side corresponding to the position where the lead wire insertion groove is formed, and a cut-out portion formed in an inclined shape that expands upward on both sides is formed in a part of the portion.

[0004] At the tip of the sleeve, locking grooves for locking lead wires are formed on both sides of the center of the sleeve. This is because when the leading end of the lead wire from which the coating of the lead wire is removed is inserted into the lead wire insertion groove of the bit, the portion where the coating of the lead wire is not removed is bent to the side to extend the lead wire. It is used to lock the corresponding part in the direction. In that sense, either one of the locking grooves may be sufficient, but it is configured on both sides.

In this wire wrapping tool, both a manual tool and an electric tool are provided. In any case, the above-mentioned attachment is attached to the tool body, and the lead wire is inserted into the lead wire insertion groove of the bit. Inserting the leading end of the sleeve from which the coating of a predetermined length has been removed, bending the portion of the lead wire extending from the lead wire insertion groove where the coating has not been removed to the side, and locking the one of the locking grooves of the sleeve. Then, the terminal pin to be wound is provided with a pin insertion hole for the bit, and then the bit is rotated in a predetermined direction by the tool body. The wire coating removal portion is gradually pulled out from the lead wire insertion groove while being wound around the terminal pin. When all of the coating removal portions of the lead wires are pulled out from the lead wire insertion grooves, the winding operation on the terminal pins is completed.

[0006] By the way, when the lead wire is wound around the terminal pin using the attachment in the wire wrapping tool which is currently used at the present time, the lead wire is wound around the terminal pin. In general, the end portion of the lead wire, which is the end portion of the winding, does not completely wind around the terminal pin, but rather protrudes laterally in a square shape.

If the ends of the lead wires from which the coating is removed project angularly sideways as described above, a short circuit may occur between adjacent pins and other circuits. In particular, recently, as the degree of circuit integration has increased and the distance between terminal pins has been reduced, the occurrence of such corners has increased the possibility of short-circuiting and increased the danger. Has become. Therefore, it is not permissible to leave it unattended. At present, after the winding operation, the horn-shaped portion protruding sideways is crushed using pliers or the like and pressed against the pin side.

[0008]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and at the end of a similar winding operation, the end portion of the winding has a square shape projecting sideways. It is an object of the present invention to provide an attachment for a wire wrapping tool without any problem.

[0009]

According to one aspect of the present invention, there is provided a bit which is rotationally driven by a tool body of a wire wrapping tool, and a sleeve which is provided on the bit and which is kept in a non-rotating state even when the bit is rotated. The bit is a concave portion located at the tip end thereof, and has a concave portion having a cutout in a part of a peripheral wall forming the bit, and a pin insertion for inserting a terminal pin is provided inside the concave portion. A hole for opening a pin insertion hole along the length direction of the bit, and a notch portion in the peripheral wall further having a lead wire insertion groove formed in the outer peripheral portion of the bit along the length direction. In the attachment of the wire wrapping tool, wherein the opening is provided, and the sleeve has a locking groove at a distal end thereof for locking an extended portion of the lead wire having the distal end inserted into the lead wire inserting groove. The notch, Even without a attachment wire wrap tool formed in parallel vertical straight with each other about the rise of the top sides.

A second aspect of the present invention is the attachment of the wire wrapping tool according to the first aspect of the present invention, wherein the height of the peripheral wall is equal to or greater than the diameter of the uncoated portion of the lead wire to be wound. .

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to an attachment for a wire wrapping tool comprising a bit and a sleeve, wherein a notch formed in a peripheral wall around a concave portion at the tip of the bit has at least a rising portion on both upper sides thereof. Is a wire wrapping tool attachment formed in a vertical straight line parallel to each other.

[0012] The bit has a concave portion at its tip end surrounded by a peripheral wall, and the peripheral wall has the notch in a part thereof. Further, the bit has a terminal pin insertion hole opened in the recess, and further has a lead wire insertion groove opened at the position of the notch in the peripheral wall.

As described above, at least the rising portions on both upper sides of the cutout portion need to be vertical straight lines parallel to each other. This is so that at the end of the operation of winding the lead wire around the terminal pin, the portion where the tip end protrudes laterally and forms a corner can be wound around the terminal pin.

The rising portions on both sides of the notch may be vertical straight lines parallel to each other from the uppermost portion to the lowermost portion. It is expedient to form a partial arc. This is because when the end of the lead wire comes out of the lead wire insertion groove at the final stage of the winding work around the terminal pin, the lead wire immediately comes into contact with the vertical straight sides of the notch, and the strong impact is generated. This is to obtain a buffering action for preventing the solder plating applied to the lead wire from being damaged.

It is preferable that the height of the peripheral wall is appropriately increased. This is also for the reason that, as in the above case, a portion that becomes a corner that is to protrude laterally at the end of winding of the lead wire is not escaped and can be wound around the terminal pin. Specifically, it is effective that the height of the peripheral wall is equal to or greater than the diameter of the uncovered portion of the lead wire to be wound.

As described above, the terminal pin insertion hole is opened in the concave portion, and the terminal pin to which the lead wire is to be wound is inserted from the opening in the concave portion. The terminal pin insertion hole is formed at a depth sufficient to insert a target terminal pin along the length direction of the bit. Further, as described above, the lead wire insertion groove is opened in the cutout portion of the peripheral wall, and the leading end uncoated portion of the lead wire whose coating is removed from the opening in the cutout portion is inserted. The lead wire insertion groove is formed on an outer periphery of the bit along a length direction of the bit.

The sleeve has a locking groove at its distal end for locking an extended portion of the lead wire in which the uncoated portion is inserted into the lead wire inserting groove. In the lead wire insertion groove, the uncoated end of the lead wire from which the coating of the lead wire has been removed is inserted. In the locking groove, an extension portion of which the coating is not removed is inserted and locked. . Although only one locking groove may be formed, it is convenient to form the sleeve on both sides sandwiching the center when viewed from the front end side.

Therefore, according to the attachment of the wire wrapping tool of the present invention, when this is attached to the tool body of the predetermined wire wrapping tool and the operation of winding the lead wire around the terminal pin is performed, the winding ends. The distal end of the uncoated portion of the lead wire can be firmly wound around the terminal pin, and does not generate a square protrusion.

The details are as follows. First, as the wire wrapping tool, both a manual tool and an electric tool are provided. In any case, the attachment of the present invention is attached to the tool body, and the lead is inserted into the lead wire insertion groove of the bit. Insert the uncoated end of the wire from which the covering for a predetermined length of the wire has been removed, and bend the extended covering portion, from which the covering of the lead wire extending from the lead wire insertion groove, has not been removed, to the side, thereby forming the sleeve. Lock in the locking groove.
When two or more locking grooves are formed, it is needless to say that the locking grooves may be locked at appropriate positions.

Then, after the pin insertion hole of the bit is covered with the terminal pin to be wound, and the bit is rotated in a predetermined direction by the tool main body, the rotation of the bit causes the lead wire to rotate. The end uncoated portion is gradually pulled out from the lead wire insertion groove while being wound around the terminal pin. As described above, since the extension covering portion, which is a portion of the lead wire extending from the lead wire insertion groove, is locked in the locking groove of the sleeve and is in a fixed state, it is inserted into the lead wire insertion groove. The end uncoated portion is pulled out while being wound.

With the operation of winding the lead wire around the terminal pin, the tip end portion of the bit, specifically the inner surface of the concave portion, is pushed up by the uncoated end portion of the wound lead wire. In addition, the tool body to which the lead wire is attached is also pushed up. By such an operation, the uncoated portion of the lead wire is spirally wound around the terminal pin in a vertically close state. When the entire uncoated portion of the lead wire is pulled out from the lead wire insertion groove, the winding operation on the terminal pin is completed.

At the end of the winding, the leading end of the lead wire coming out of the lead wire insertion groove does not receive the acting force in the winding direction by the lead wire insertion groove.
Be free. Therefore, if the leading end of the lead wire is left as it is, it becomes a protruding portion that protrudes in a sideways manner, but the bit of the present invention is such that at least both upper portions of the notch are parallel to each other. Because it is formed in a vertical straight line,
With the rotation of the bit, the tip of the lead wire comes into contact with one of the notches corresponding to the corresponding vertical straight side, and the tip of the lead wire thus becomes perpendicular to the notch. When the bit comes into contact with the linear side portion, the bit is not subjected to the lifting action, and therefore, with the subsequent rotation of the bit, the bit is bent to the terminal pin side at this portion, and subsequently, the peripheral wall of the peripheral wall is further bent. Similarly, the inner surface is bent to be in close contact with the terminal pin side, so that the occurrence of a square protrusion is avoided.

As described above, the peripheral wall has a moderately high height, for example, a height equal to or greater than the diameter of the uncovered portion of the target lead wire. However, even if the uncovered portion of the lead wire in contact with the inner surface of the recess has a pushing action, the pressing and bending action on the terminal pin side is completed before the uncoated portion of the lead wire comes out of the peripheral wall. As a result, the above-mentioned angular protrusion does not occur at the end of the winding of the lead wire around the terminal pin.

According to the attachment of the wire wrapping tool of the present invention, when the lead wire is wound around the terminal pin, the projecting portion at the end of which the lead wire projects laterally angularly at the end of the winding. Does not cause
There is no possibility of causing a short circuit accident between adjacent terminal pins and other circuits. In addition, since the horn-shaped protrusions are not generated in this manner, a correction operation using pliers or the like to eliminate the protrusions becomes unnecessary, and the work efficiency of the wire wrapping operation is increased.

[0025]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 show an attachment of a wire wrapping tool according to an embodiment to which the present invention is applied. FIG. 1A is a side view of a bit, and FIG.
FIG. 1C is a side view of the bit in a state where the bit is rotated left by 90 degrees when viewed from the front, FIG. 1C is a side view of the sleeve, and FIG.
FIG. 1C is a side view of the sleeve in a state where the sleeve is rotated counterclockwise by 90 degrees when viewed from the front, and FIG. 2 is a side view of the state in which the sleeve is covered with the bit (the sleeve is indicated by a dashed line for convenience). 3 (a) is an enlarged front view of the tip of the bit, FIG. 3 (b) is an enlarged side view of the vicinity of the tip of the bit, and FIG.
(C) is an enlarged front view of the tip of the sleeve. FIG. 4 is an enlarged side view showing a state in which a lead wire is wound around a terminal pin.

As shown in FIGS. 1 and 2, the attachment of the wire wrapping tool of this embodiment comprises a bit 1 and a cylindrical sleeve 2 for rotatably covering the bit. As shown in FIGS. 1 (a), (b), FIGS. 2, 3 (a) and (b), the bit 1 has a concave portion 3 formed at its tip and a peripheral wall 4 forming the concave portion 3. A notch 5 is formed in a part. As shown in FIGS. 3 (a) and 3 (b), the notch 5 is formed with inclined portions 5a, 5a which expand upward at the lower part of the rising edge on both sides, and are parallel to each other at the upper part. The vertical straight portions 5b and 5b are configured. The height of the peripheral wall 4 was set to three times the diameter of the wire from which the covering of the lead wire w to be wound was removed.

The bit 1 has a recess 3 at the tip thereof.
A terminal pin insertion hole 6 opening in the inside is formed, and a lead wire insertion groove 7 opening at the position of the notch 5 is formed.

The terminal pin insertion hole 6 is, as described above,
1A and 1B, a target terminal pin p is inserted from the opening in the concave portion 3 along the length direction of the bit 1 with a margin, as shown in FIGS. It is formed to the depth possible.

The lead wire insertion groove 7 is formed as described above.
1 (a), 1 (b), 2 and 3 (a) and (b)
As shown in FIG. 3, the opening is formed in the notch 5 of the peripheral wall 4 and is formed on the outer periphery of the bit 1 along the length direction thereof. The diameter of the lead wire insertion groove 7 is set so as to slightly exceed the diameter of the wire from which the coating of the target lead wire w has been removed, that is, the wire diameter of the uncoated end portion f.

Further, at the rear end of the bit 1, FIG.
As shown in FIGS. 2A and 2B and FIG. 2, an attaching portion 8 for attaching to the tool body is configured.

On the other hand, the sleeve 2 is shown in FIG.
(D) As shown in FIG. 2 and FIG. 3 (c), an extension covering portion g which is an extension portion of the lead wire w in which the tip non-coating portion f is inserted into the lead wire insertion groove 6 is provided at the tip. Are formed, and a groove 10 for coupling with the tool body is formed at the rear end. The inner diameter of the bit 1 is a diameter that allows the portion other than the mounting portion 8 of the bit 1 to be rotatable, that is, a size slightly larger than the outer diameter of the portion of the bit 1 other than the mounting portion 8.

The pair of locking grooves 9, 9 are formed as shown in FIG.
(D), as shown in FIG. 2 and FIG. 3 (c), the sleeve 2 is formed on both sides sandwiching a central portion thereof when viewed from the front end side.

Therefore, according to the attachment of the wire wrapping tool of this embodiment, when this is attached to the tool body of the predetermined wire wrapping tool and the lead wire w is wound around the terminal pin p, the solid line shown in FIG. As shown in FIG. 4, the end portion e of the end uncovered portion f of the lead wire w, which is the end portion of the winding, can be securely wound around the terminal pin p, and the angular protrusion as shown by the one-dot chain line in FIG. Do not produce part x.

This operation is performed as follows. First, as the wire wrapping tool, both a manual tool and an electric tool are provided, but in this embodiment, a tool body configured in a gun shape is used, and the attachment of this embodiment is attached to the tip thereof. A predetermined lead wire w to the target terminal pin p
Work of winding. The attachment of the attachment to the tool body is exactly the same as that of a conventional general one.

First, in the lead wire insertion groove 7 of the bit 1,
Insert the uncoated end portion f of the lead wire w from which the coating for a predetermined length has been removed, and bend the extended coating portion g from the lead wire insertion groove 7 from which the coating has not been removed to the side to remove the coating. The sleeve 2 is inserted and locked in one locking groove 9.

Thereafter, after the terminal pin p to be wound is covered with the terminal pin insertion hole 6 of the bit 1, the bit 1 is rotated in a predetermined direction by the tool body. When the bit 1 is rotated in this manner, the tip uncoated portion f, from which the coating of the lead wire w is removed, is gradually pulled out from the lead wire insertion groove 7 while being wound around the terminal pin p with this rotation. . As described above, since the extension coating portion g of the lead wire w extending from the lead wire insertion groove 7 is locked and fixed in the locking groove 9 of the sleeve 2, The tip uncoated portion f inserted into the lead wire insertion groove 7 is pulled out while being wound around the terminal pin p without moving.

With the above-described winding operation of the lead wire w around the terminal pin p, the inner surface of the concave portion 3 of the bit 1 is pushed up by the uncoated portion f of the tip of the wound lead wire w. The tool body to which this is attached is also pushed up. By such a lifting operation, the uncovered portion f of the lead wire w is spirally wound around the terminal pin p in a vertically close state. Needless to say, when the entire uncoated portion f of the lead wire w is pulled out from the lead wire insertion groove 7, the winding operation around the terminal pin p is completed.

At the end of the winding, the leading end e of the leading end uncovered portion f of the lead wire w which has escaped from the lead wire inserting groove 7 acts at the time in the direction of winding by the lead wire inserting groove 7 in the winding direction. No longer receive it and become free once.

However, due to the subsequent rotation of the bit 1,
The free end f of the free end portion f of the lead wire w immediately comes into contact with one of the inclined portions 5a, 5a at the lower portions on both sides of the notch portion 5 and slides there to move to slightly move the bit 1. After pushing up, the vertical straight portions 5b, 5b on both sides
Will come into contact with one of them.

Therefore, the distal end e of the uncovered distal end f of the lead wire w does not immediately come into contact with one of the vertical straight portions 5b of the cutout 5, but the lower inclined portions 5 on both sides.
a and 5a, the bit 1 is slightly slid up and slightly pressed up, so that the bit 1 is brought into contact with the bit 1; therefore, the impact at the time of contact with the vertical linear portion 5b is reduced, and the lead wire w There is no problem that damages the solder plating.

When the tip e of the uncoated portion f of the lead wire w comes into contact with the corresponding one of the vertical straight portions 5b, mutual contact at this portion is performed in a right angle direction. Since the acting force acts at a right angle, no push-up action on the bit 1 occurs, so that the tip e of the lead wire w here follows with the subsequent rotation of the bit 1,
It is bent to the terminal pin p side, and subsequently, is bent to the terminal pin p side in close contact with the inner surface of the peripheral wall 4, thereby avoiding the occurrence of the angular projection x as shown in FIG. 4. .

As described above, the height of the peripheral wall 4 is set to be three times the diameter of the uncoated portion f of the tip of the target lead wire w. Even if the uncovered portion f of the lead wire w that comes into contact with the inner surface of the concave portion 3 causes a push-up action, the uncovered portion f of the lead wire w
The pressing and bending action on the terminal pin p is completed before the lead wire comes out of the recess 3, and the above-described corner is formed at the tip end e which is the end of the winding of the lead wire w around the terminal pin p. There is no room for the protruding portion x to be formed.

[0043]

According to the wire wrapping tool attachment of the present invention, when the wire wrapping tool is attached to the tool body of a predetermined wire wrapping tool and the lead wire is wound around the terminal pins, the end of the winding is obtained. The leading end of the lead wire, which is a portion, can be securely wound around the terminal pin, and does not generate a square protrusion. Therefore, the terminal pin around which the lead wire is wound does not cause a short circuit between adjacent terminal pins and other circuits. In addition, since the angular projections are not generated in this manner, a correction operation using pliers or the like to eliminate the protrusions is not required, and the work efficiency of the wire wrapping operation is improved.

According to the attachment of the wire wrapping tool of the second aspect of the present invention, since the height of the peripheral wall is equal to or greater than the diameter of the uncoated portion of the tip of the lead wire to be wound,
With the rotation of the bit, even if a push-up action is caused by the lead wire abutting on the inner surface of the recess, the pressing and bending action on the terminal pin side is completed before the lead wire is pushed out of the peripheral wall, At the end of the winding of the lead wire around the terminal pin, the above-mentioned angular projection does not occur.

[Brief description of the drawings]

FIG. 1A is a side view of a bit in an attachment of a wire wrapping tool according to one embodiment. FIG. 2B is a side view of the bit in a state where the bit shown in FIG. (C) is a side view of the sleeve in the attachment of the wire wrapping tool of one embodiment. (D)
FIG. 2 is a side view of the sleeve in a state where the sleeve is rotated left by 90 degrees when viewed from the front in FIG.

FIG. 2 is a side view of a state in which a sleeve is externally mounted on the bit (the sleeve is indicated by a dashed line for convenience).

FIG. 3A is an enlarged front view of a tip of a bit. (B)
Is an enlarged side view near the tip of the bit. (C) is an enlarged front view of the tip of the sleeve.

FIG. 4 is an enlarged side view showing a state in which a lead wire is wound around a terminal pin.

[Explanation of symbols]

 1 bit 2 sleeve 3 concave portion 4 peripheral wall 5 notch portion 5a inclined portion 5b vertical linear portion 6 terminal pin insertion hole 7 lead wire insertion groove 8 attachment portion 9 locking groove 10 coupling groove e lead wire tip f uncoated tip g Extension coating p Terminal pin w Lead wire x Square projection

Claims (2)

[Claims] 1. A bit which is driven to rotate by a tool body of a wire wrapping tool, and a sleeve which is mounted on the bit and which is kept in a non-rotating state even when the bit is rotated, wherein the bit has a tip A recess having a notch in a part of the peripheral wall forming the recess, and a pin insertion hole for inserting a terminal pin inside the recess, wherein the length of the bit is A pin insertion hole along the direction is opened, and a lead wire insertion groove formed along the length direction on the outer peripheral portion of the bit is opened in a notch portion in the peripheral wall, and the sleeve has a tip end. A wire wrapping tool attachment having a locking groove for locking an extended portion of a lead wire whose leading end is inserted into the lead wire insertion groove, wherein the notch is formed at least on both upper sides thereof. Standing Attachment of wire wrap tool formed in parallel vertical straight mutually for up. 2. The wire wrapping tool attachment according to claim 1, wherein the height of the peripheral wall is equal to or greater than the diameter of the uncovered portion of the lead wire to be wound.