JPH0475279A - U-slit wire connecting tool - Google Patents

Abstract

PURPOSE:To easily insert a tool into a terminal stand and lessen the damage by forming a taper part having a prescribed shape in the inner walls of a supporting part and a pushing part in a combined body in the conditions where the force of a tool main body assists the combinding. CONSTITUTION:In a pair of supporting parts of a tool main body 2, a tip of one supporting part 2a in the fixed cutting blade 3 side hits against the upper face of a terminal stand 10 and the fixed cutting blade 3 is lowered and an unnecessary end of a coated electric wire 7 is cut and the electric wire is connected with a U-slit terminal 14. For this, a taper part 9 facing outside is so formed in the inner wall of the supporting part 2a as to be gradually widended upward and the groove part of both main bodies 2 are so formed as to be gradually widended from in the lower end having narrow width to the upper, so that the supporting part 2a can lean and swing in the groove part of the stand 10 and the play space of the tool back and forth becomes large. Meanwhile, the pushing part 2b is the same and even if the supporting part 2a is tilted and hits against the stand 10, insertion of the tool becomes easy and damages owing to forcing force are prevented.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a U-slit connection tool.

[Conventional technology]

As shown in the front view of the main part in Fig. 7 and the bottom view in Fig. 8, this type of conventional wiring tool has a fixed cutting blade a that can freely slide up and down with a cutting edge formed at the tip. The tool body C is assembled with a restoring force applied to the tip side (downward) by a spring (not shown). It is known that pushing pieces e, e for pushing electric wires, each having tapered surfaces that gradually become smaller as they go upward from the groove part f, are arranged in opposition to each other so as to protrude from both sides in the groove f.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional wire connection tool, the opposing inner wall surfaces of the supporting pieces d, d and the pushing pieces e, e are formed on each vertical surface, and the lateral spacing between them is 2, β. ' is small, so when connecting the electric wire g, when pushing the electric wire g into the electric wire connection part j of the U-slit terminal i on the terminal block using the pushing pieces e and e as shown in FIGS. Arrow 771 + in Figure 9
The play indicated by i71' on both sides of the tool, that is, in the left-right direction of the tool, was sufficient because the pushing pieces e and e were formed on the tabers as described above, but on the other hand, the arrow nHn' in Fig. 1O There was very little play in the longitudinal direction of the tool.

In other words, in the state in which the pushing pieces e and e were inserted into the groove k of the terminal block, the angle at which the tool could tilt forward and backward was very small.

By the way, some workers often push the push-in pieces e and e in a state that is tilted back and forth more than the above-mentioned tilt angle, and in such cases, unreasonable force is applied to the tool and the terminal block. It was easily damaged.

Further, since it is necessary to insert the tool as perpendicularly as possible into the groove k of the terminal block, there are problems such as poor operability and workability.

The present invention has been made in view of the above-mentioned problems of conventional tools, and includes an outwardly facing taper on the inner wall of one or both of the supporting piece and the pushing piece so as to gradually expand from the bottom to the top. By forming the groove at the lower end of the tool so that the groove width gradually increases from the lower end to the upper end of the narrow width, it is possible to increase the tilting angle of the tool in the front-rear direction with respect to the groove of the terminal block. It is an object of the present invention to provide a U-slit wiring tool that facilitates insertion of the tool into a terminal block, reduces damage, and improves operability and workability.

[Means for Solving the Problems 1] In order to achieve the above object, the U-slit wiring tool of the present invention includes a fixed cutting blade with a cutting edge formed at the tip, and a push-in piece for a covered electric wire on the inner wall of a pair of support pieces at the tip. A tool body is formed by combining a tool body with opposing protrusions in such a manner that the tool body can freely slide up and down relative to the fixed cutting blade, and a return force is applied to the tip side by a spring, wherein the support It is characterized in that an outward tapered portion is formed on the inner wall of one or both of the piece and the pushing piece so as to gradually expand from the bottom to the top.

[Operation] After the covered wire is placed in a substantially horizontal state facing the wire socket of the U-slit terminal that opens in the groove between each protrusion of the terminal block, the lower end of the pair of support pieces and the push-in piece are attached to the covered wire. While holding the lower ends of the tool body together, insert the pushing pieces of both support pieces in the tool body into the groove of the terminal block, and push down the handle body.

In this way, the covered wire is forcibly pushed into the wire clamping part of the U-slit terminal and the groove of the terminal block by the pushing piece, and is held by the wire clamping part of the U-slit terminal and the terminal block groove. As a result, the tip of the support piece on the fixed cutting blade side of the pair of support pieces in the tool body hits the top surface of the terminal block, and the top surface receives a pushing force against the return force of the spring, causing the tool body to move upward. As a result, the fixed cutting blade descends, the remaining end of the covered wire is cut by the cutting edge of the fixed cutting blade, and the covered wire is connected to the U-slit terminal.

In this way, when connecting the covered electric wire to the U-slit terminal, the pushing piece is inserted into the groove of the terminal block as described above, but the pushing piece is inserted into the inner wall of one or both of the supporting pieces from the bottom to the top. By providing the outwardly tapered portions that gradually widen, the groove portion of the tool body formed between both support pieces is formed so that the width of the groove gradually increases from the lower end to the upper end.

Therefore, both support pieces are inserted in the groove of the terminal block in the front-rear direction (
It is possible to tilt and swing in the direction perpendicular to the width direction of the groove.
This increases the play of the tool in the longitudinal direction.

On the other hand, by providing a tapered part corresponding to the tapered part of the support piece on the inner wall of one or both of the pushing pieces, the groove formed between both pushing pieces has a narrow width from the lower end to the upper end. Formed to gradually increase in size.

Therefore, the pushing piece can also tilt and swing in the same direction as the supporting piece.

In this way, the tool can be tilted and swung at a predetermined angle in the front-rear direction without being obstructed by not only the protrusion of the terminal block but also the U-slit terminal.

Next, after connecting the covered wire, if you release the downward force of the complement, the tool body will descend due to the return force of the spring.
It protrudes below the cutting edge of the fixed cutting blade and is held in that position.

[Examples] Examples of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the U-slit wiring tool of the present invention is comprised of a complement 1, a tool body 2, a cutting blade 3, a spring 4, and a holder 5 as main components.

As shown in FIGS. 1 to 4, the tool body 2 is provided with a downwardly opening groove 6 at approximately the center of the tip, so that the pair of front and rear support pieces 2a, 2a are integrated and A pusher for pushing in electric wires, which is formed to have the same length and has a groove 6' having the same shape as the groove 6 in the center of the inner wall of the groove 6 in the support pieces 2a, 2a, is approximately inverted U-shaped from the front. Although the pieces 2b, 2b are integral and somewhat shorter than the supporting pieces 2a, 2a, the pushing pieces 2b, 2b are provided so as to protrude oppositely from each other so as to have the same length at their lower ends.

Thus, the inner walls of both supporting pieces 2a, 2a (each pushing piece 2b
, 2b) are formed with outwardly tapered portions 9 that gradually widen from the bottom to the top.
The length n between the outer surfaces of the projections 11 .
When the tool is inserted into the groove 12 for inserting the electric wire formed between configured.

As an embodiment of the tapered portion 9, both support pieces 2a, 2
It is preferable to form them on the inner wall of the support piece a and at the same angle (for example, about 5"), but they may be formed only on the inner wall of either one of the support pieces.

Both the support pieces 2a, 2a have a substantially semicircular recess 8 for positioning the covered electric wire 7 in the center of the end surface corresponding to each pushing piece 2b, 2b. The support piece 2a is also attached to the opposing inner wall of the pushing pieces 2b, 2b.
, 2a is formed with an outwardly tapered portion 13 that gradually widens from the bottom to the top, thereby increasing the upper width of the groove width m' shown in FIG. The U-slit terminal 14 is formed to be larger than the plate thickness n' by a desired dimension, so that the U-slit terminal 14 does not get in the way even if the tool is tilted in the direction of arrows p4-4p' in FIG. configured.

Examples of embodiments of the tapered portion 13 include a pushing piece 2b,
It is preferable to form the tapered portion 9 on the opposing inner wall of the supporting piece 2b and at the same angle as the tapered part 9 of the supporting piece 2a.
, 2a, and the angle may be slightly thicker than the tapered portion 9.

Further, as shown in FIG. 3, both of the pushing pieces 2b, 2b are formed so that the width thereof gradually decreases from the lower end to the upper end by providing tapered surfaces 13' on both sides thereof. This allows the push-in pieces 2b, 2b to connect to the terminal block 1.
When the tool is inserted into the wire insertion groove 12 of No. 0, the tool has a large play in the left-right direction (groove width direction) as indicated by arrows q←q' in FIG.

By the way, in the case where the terminal block 10 is formed by embedding the U-slit terminal 14 shifted to one side from the center of the insulating block 15 as shown in FIGS. 4 to 6, each protrusion 11
．． Since the widths L' of the grooves 12 and 12 formed before and after the U-slit terminal 14 between the terminals 11 and 11 are different as shown in the figure,
When used in such a terminal block 10, the push-in piece 2
The lengths ρ and p' of the lower ends of b and 2b are formed corresponding to the width L' of the groove portion 12.12.

Next, the cutting blade 3 has a width in the left and right direction that is between the width of the tool body 2 and a cutting edge 3a formed in a single edge at the tip.

As shown in FIG.
The cutting blade 3 is fixed to a holder 5 fixed inside the tip of the complement 1 with a set screw 16... ,
-The blade tool body 2.

The base portion 2c is inserted into the through hole 5a of the holder 5 so as to be slidable in the vertical direction.

A compression spring 4 is installed in the concave hole 1a with its base end and both ends supported at the bottom of the concave hole 1a of the complement 1.
A return force is applied downward to the tool body 2, and the tool body 2 moves its support piece 2 against this return force.
The tips of the cutting blades a and 2a are supported by the holder 5 so that they are stopped and held normally (when not in use) with the tips of the cutting blades 3 protruding slightly downward from the cutting edge 3a of the cutting blade 3.

The tool body 2 is stopped and held by the tool body 2.
A long hole 2d passes through the base 2c in the vertical direction, and the long hole 2d
By inserting the screw 17 for joining the two handle halves to form the complement 1, the tool body 2 is attached to the spring 4.
Alternatively, the tool body 2 may be supported in such a way that it can be pushed up against the restoring force. A configuration may also be adopted in which matching upward step portions 5b, 5b are provided on both left and right sides of the through hole 5a in the holder 5.

The U-slit terminal 14 of the terminal block 10 has a wire socket 14a and a wire clamping part 14b arranged vertically at one end (the upper end in the figure) in a row in the same straight line, and the wire socket 14a
is formed to be able to receive the covered electric wire 7 and to have the same width as the groove portion 12.12' of the terminal block IO, while the width of the wire holding portion 14b is the same as that of the socket 14a and the groove portion 12.12.
' and is formed to be slightly narrower than the outer shape of the covered wire 7.

〔Effect of the invention〕

As explained above, in the present invention, the insulated wire 7 is held in the wire holding portion 14b of the U-slit terminal 14 by the pushing pieces 2b, 2b.
and push it into the groove 12, 12' of the terminal block IO, clamp it,
When connecting, the supporting pieces 2a, 2a and the pushing piece 2b
, 2b are each formed with an outwardly tapered portion 9.13 that gradually widens from the bottom to the top. ) is designed to allow a considerable amount of room for tilting and swinging, so the tool has a lot of play in the front and back direction, which causes the groove 12.
Push the tool into 12' over a wide range (wide angle)
Since it can be easily done from the support pieces 2a, 2
a, groove portions 12 and 12' of the push-in pieces 2b and 2b and the terminal block 10
There is no need to apply unreasonable force to the protrusions 11, etc., and therefore damage to these parts can be reduced. The connection workability is also significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view showing an embodiment of the U-slit connection tool according to the present invention, FIG. 2 is an enlarged front view showing the main parts of the same embodiment, and FIG. A partially cutaway side view of an example of use, FIG. 4 is shown as III-I in FIG.
A sectional view showing a state in which a covered electric wire is clamped and connected to the wire clamping part of a U-slit terminal and the remaining end is cut, when cut along line II and viewed in the direction of the arrow. 6 is a perspective view illustrating a terminal block, FIGS. 7 and 8 are front and bottom views showing the main parts of a conventional U-slit connection tool, and FIGS. 9 and 10 are The figures are a side view and a front view, partially in section, showing how the tool is used. 5 ・6. 9. Main symbols in the figure: Holder 6', Groove section 13, Taper section

Claims (1)

[Claims] A fixed cutting blade having a cutting edge formed at the tip, and a tool body having a pushing piece of covered electric wire protruding from the inner wall of a pair of supporting pieces at the tip, the tool body being able to freely slide up and down with respect to the fixed cutting blade,
and the supporting piece and the pushing piece are combined with a return force applied to the distal end side by a spring, and the inner wall of one or both of the supporting piece and the pushing piece is provided with an outward taper so as to gradually widen from the bottom to the top. A U-slit connection tool characterized by having a U-slit connection tool.