JP2802515B2 - U slit connection tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a U-slit connection tool.

B. 2. Description of the Related Art As shown in a front view of a main part of FIG. 9 and a bottom view of FIG. 10, a conventional connection tool of this type slides up and down on a fixed cutting blade a having a cutting edge b at a tip thereof. A tool body c is provided, which is freely and united in a state in which a return force is urged toward the distal end (downward) by a spring (not shown), and a pair of left and right support pieces d and d 'of the tool body c for pushing wires. Push-in piece e,
It is known that e 'is formed to the full length of the groove f in the vertical direction.

C. Problems to be Solved by the Invention However, according to the above-mentioned conventional connection tool, since the pushing pieces e and e 'have a large vertical width, when the electric wire g is connected,
As shown in FIG. 11, when the electric wire g was pushed into the electric wire connection portion j of the U slit terminal i in the terminal block h by the pushing pieces e and e ', play in the left-right direction of the tool was small. That is, when the pushing pieces e and e 'are inserted into the groove k of the terminal block h, the angle α at which the tool can tilt in the left-right direction is very small.

For this reason, the pushing pieces e and e 'are often pushed in a state in which the pushing pieces e and e' are inclined to the left and right more than the above-mentioned tilt angle α. In such a case, an excessive force is applied to the tool and the terminal block h, and the tool and the terminal block h are easily damaged. Also, since it is necessary to insert a tool into the groove k of the terminal block h as perpendicularly as possible, there is a problem that operability is poor.

The present invention has been made in view of such a problem of the above-mentioned conventional tool, and the vertical width of the electric wire pushing piece is formed smaller than the vertical width of the groove formed between the protrusions of the terminal block. In addition, by forming both sides of the pushing piece into a tapered surface so as to gradually decrease from the lower end to the upper end, the play of the tool and the terminal block can be reduced by increasing the play in the left-right direction with respect to the groove of the terminal block. While making it difficult to receive,
It is an object of the present invention to provide a U-slit connection tool capable of improving operability and work efficiency.

D. Means for Solving the Problems In order to achieve the above object, a U-slit connection tool of the present invention includes a fixed cutting blade having a cutting edge formed at a tip thereof, and a pair of left and right support pieces of a groove at the tip, each of which has a pushing piece. A tool body formed opposite to the cutting blade, the tool body being slidable up and down with respect to the cutting blade, and being united in a state in which a return force is urged toward the distal end by a spring; Pressing pieces are formed only at the tip of each support piece, and the vertical width is set smaller than the vertical width of the groove formed between the protrusions of the terminal block, and both sides of each pressing piece are tapered. The width is gradually reduced from the lower end to the upper end by being provided on the surface.

E. After the coated wire faces the wire receiving port of the U-slit terminal opened in the groove between the projections of the terminal block in a substantially horizontal state,
The indentation at the lower end of the pair of support pieces and the lower end of the pressing piece are abutted against the coated electric wire, and while holding the handle, the pushing pieces of both support pieces in the tool body are inserted into the groove of the terminal block to push down the handle. .

Thus, the coated wire is forcibly pushed into the wire holding portion of the U-slit terminal and the groove of the terminal block by the pressing piece, and is held between the U-slit terminal and the wire holding portion of the terminal block groove. Of the pair of support pieces of the tool body, the tip of the support piece on the cutting blade side abuts against the upper surface of the terminal block, and the upper surface receives a pushing force against the return force by the spring, so that the tool body moves upward. As a result, the cutting is lowered, and the other end of the coated electric wire is cut by the cutting edge of the cutting blade, and the coated electric wire is connected to the U slit terminal.

In this way, when connecting the insulated wire to the U-slit terminal, the pushing piece is inserted into the groove of the terminal block as described above, but the vertical width of the pushing piece is formed smaller than that of the groove. At the same time, since both sides of the pushing piece are formed on the tapered surface so as to gradually decrease from the lower end to the upper end, the pushing piece can be tilted and swung in a wide angle in the left and right directions in the groove portion, thereby enabling the tool to move in the left and right directions. Since the play on the terminal block becomes large, the insertion operation into the groove of the terminal block becomes easy, and no excessive force is applied to the groove of the terminal block and the pushing piece.

In this way, if the pushing-down force of the handle is released after connecting the coated electric wires, the tool body is lowered by the return force of the spring, protrudes below the cutting edge of the cutting blade, and is held at that position.

F. Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 4, the U-slit connection tool of the present invention includes a handle 1, a tool body 2, a cutting blade 3, a spring 4, and a holder 5 as main members.

The tool body 2 has a pair of support pieces on the left and right by providing a groove 6 in a substantially inverted U-shape on the front at a substantially central portion of the tip.
2a and 2b are formed integrally and at the same length, and push pieces 2c and 2d for pushing the electric wires are provided opposite to the center of the support piece 2a and 2b near the tip on the inner surface of the groove 6 side. Let me do it.

Each of the supporting pieces 2a and 2b has a recess 8 for positioning the covered electric wire 7 in a substantially semicircular shape at the center of the end face corresponding to each of the pushing pieces 2c and 2d.

As shown in FIG. 5, each of the pushing pieces 2c and 2d has a groove formed in the projections 10 and 10 of the terminal white 9, as shown in FIG.
11 is formed slightly smaller than the width n.

Also, the two pushing pieces 2c and 2d are formed between the protrusions 10 and 10 of the terminal block 9 within a range where the vertical width 1 shown in FIG. It is formed so as to be as small as possible in comparison with the vertical width of the groove portion 11 formed, and by providing tapered surfaces t, t on both sides of both the pushing pieces 2c, 2d, from the lower end to the upper end of the widening. The width is formed so as to become gradually smaller, whereby the pushing pieces 2c and 2d are formed.
Is inserted in the groove 11 of the terminal block 9 and the seventh arrow P,
The play in the left-right direction of the tool indicated by P 'is increased.

In the case where the terminal block 9 is formed by embedding the U-slit terminal 12 so as to be shifted from the center of the insulating block 13 to one side as illustrated in FIGS. The width L of the grooves 11, 11 'formed before and after the U slit terminal 12,
Since L 'is different as shown in the figure, when used in such a terminal block 9, the lengths Q and Q' of the pushing pieces 2c and 2d are equal to the widths L and L 'of the grooves 11, 11'. It is formed correspondingly.

The cutting piece 3 has a width in the front-rear direction substantially the same as that of the tool main body 2 in the drawing, and a cutting edge
3a is formed on one edge.

Thus, the tool body 2 and the cutting blade 3 are united with the outer surface of the tool body 2 on the side of the support piece 2a facing the side surface of the cutting blade 3 on the side of the cutting edge 3a. The blade 3 is fixed to a holder 5 fixed inside the tip of the handle 1 with set screws 14.
The base 2e is slidably inserted in the through-hole 5a of the holder 5 in the vertical direction. In a state where both ends are supported at the base end and the bottom of the recess 1a of the handle 1, a return force is urged downward on the tool body 2 by the compression spring 4 provided in the recess 1a. Against this return force, the tool main body 2 has its support pieces 2a, 2b having the tips of the cutting blade 3
Normal state (when not in use) with a slight protrusion from 3a
The holder 5 is supported so as to be stopped and held.

As the stop holding means of the tool main body 2, a long hole 2f is vertically penetrated through the base 2e of the tool main body 2, and
By inserting a screw 15 for joining the two members to form the handle 1, the tool body 2 may be supported so as to be able to be pushed up against the return force of the spring 4 or the tool body 2. Steps 2g, 2g facing downward on the left and right sides of the base 2e
May be formed, and upwardly-facing stepped portions 5b, 5b engaged with the stepped portions 2g, 2g at required positions may be provided on both left and right sides of the through hole 5a in the holder 5.

Furthermore, it is of course possible to add these configurations or to adopt another configuration.

The U-slit terminal 12 of the terminal block 9 has a wire receiving port 12a and a wire holding portion 12b vertically arranged at one end (upper end in the drawing) on the same straight line. 7 can be received, and the groove portions 11 and 1 of the terminal block 9 are provided.
1 'is formed to have the same width n, while the wire holding portion 12b
Is formed to be narrower than those of the receiving port 12a and the grooves 11, 11 'and the outer shape of the covered electric wire 7.

Of course, the U and the slit terminal 12 are embedded in the insulating block 13 so that the wire receiving port 12a and the wire holding portion 12b are aligned on the same straight line corresponding to the grooves 11, 11 '.

1 and 4, reference numeral 1b denotes a flange of the handle 1.

G. Effect of the Invention Since the present invention is configured as described above,
The pushing wires 2c and 2d push the covered electric wire 7 into the wire holding portion 12b of the U-slit terminal 12 and the grooves 11 and 11 'of the terminal block 9, and hold and connect the pushing wires 2c and 2d. , 2b only, and the vertical width 1 is set to be considerably smaller than the groove of the terminal block, and is gradually reduced from the lower end to the upper end on both sides of the pushing pieces 2c, 2d. Are provided with tapered surfaces t, t, so that the terminal block 9
Right and left (in the width direction of the groove) within the grooves 11 and 11 '
, The play in the left and right direction of the tool is increased, so that the tool can be pushed into the grooves 11, 11 'of the terminal block 9 in a wide range (wide angle). Since it can be easily performed from above, no excessive force is applied to the pressing pieces 2c and 2d and the groove portions 11 and 11 'of the terminal block 9, so that not only these are not damaged but also the tool Of the U-slit terminal 12 and the groove of the terminal block 9
The work efficiency of connecting the covered electric wire 7 to the 11, 11 'can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a front view partially showing an embodiment of a U-slit connection tool according to the present invention, FIG. 2 is an enlarged bottom view of a main part in the embodiment, and FIG. FIG. 4 is a longitudinal sectional front view of a main part showing a state where a tool body is pushed up in the embodiment, and FIG. 5 is an example of use of the embodiment. FIG. 6 (a) and FIG. 6 (b) are cutaway views taken along the line VII-VII in FIG. 5, and FIG. Each cross-sectional view showing a state where a covered electric wire is clamped and connected to a clamping portion and an extra end is cut off,
FIG. 7 is an explanatory view of a use state in the embodiment, FIG. 8 is a perspective view illustrating a terminal block, and FIGS. 9 and 10 are front and bottom views showing main parts of a conventional U-slit connection tool. FIG. 11 is an explanatory diagram of a use state of the tool. Main symbols 1 in the figure 1... Handle 2... Tool body 2 a, 2 b... A pair of support pieces 2 c, 2 d... Pushing piece 3... Cutting blade 3 a. Groove t: Tapered surface

Continuation of front page (72) Inventor Shizuo Moroboshi 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References Japanese Utility Model Sho-61-161988 (JP, U) Japanese Utility Model Sho-62-24479 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) H01R 4/24 H01R 43/00 H01R 43/01 H01R 43/027

Claims (1)

(57) [Claims] 1. A fixed cutting blade 3 having a cutting edge 3a formed at its tip,
A pair of pushing pieces 2c,
The tool body 2 formed opposite to 2d is united in a state where the tool body 2 is slidable up and down with respect to the cutting blade 3 and a return force is urged in the distal direction by a spring 4. The pushing pieces 2c and 2d are provided only at the distal ends of the supporting pieces 2a and 2b, and the vertical width 1 is the vertical width of the groove 11 formed between the protrusions 10 and 10 of the terminal block 9. U-slit connection characterized in that the width is gradually reduced from the lower end to the upper end by providing both sides of each of the pushing pieces 2c, 2d on the tapered surfaces t, t, while forming the pressing slits 2c, 2d on both sides. tool.