JPH05303983A - Crimping sleeve and die for wire jointing - Google Patents

Abstract

PURPOSE:To provide a crimping sleeve for wire jointing capable of firmly holding wires without flawing them by bending a plate sleeve body into a pipe sectional form to form wire holding grooves on both sides, and providing a plurality of ribs in the right-angle direction. CONSTITUTION:A plate sleeve body 1 is folded by use of a crimping die so that the respective holding grooves 6, 6 for two wires 9, 10 to be jointed are formed in parallel on both sides. The sectional form of the holding grooves 6 is closer to that of a pipe so that the wires 9, 10 are enclosed, respectively. Further, a plurality of ribs 2 are provided in the right-angled direction to the longitudinal direction of each wire 9, 10 to be inserted to the holding grooves 6 and at intervals from one end of the sleeve body 1 to the other end. Thus, the crimping force of the sleeve body 1 is dispersed to both side plates and reduced, and a sleeve 8 apable of firmly holding and jointing the wires 9, 10 without flawing them is provided. The crimping die is formed of a male die having curved grooves having recessed grooves corresponding to the ribs 2 and a female die having curved grooves having recessed grooves in recessed parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination of a compression sleeve for connecting electric wires such as a trunk line and a branch line and a die for compressing the compression sleeve.

[0002]

2. Description of the Related Art Conventionally, a wire connector for connecting a trunk line and a branch line uses a bolt connector or a C-type compression sleeve,
The main line and the branch line are sandwiched, and these are fastened by bolts or compression. Of these, FIG. 16 shows the compression sleeve for wire connection, which has a C-shaped cross section.
As shown in, the opening on one side of the sleeve (a) with a C-shaped cross section
Insert the trunk line (c) and the branch line (d) from (b), and in this state, compress the outer circumference of the sleeve (a) with a compression die, and integrate the trunk line (c) and the branch line (d) as shown in FIG. It is grasped and connected by a so-called cantilever force.

[0003]

However, since this compression sleeve (a) has the opening (b) on one side, a compressive load is applied only to one back side plate on the other side, and therefore this compression force is increased. Is large. Therefore, a strong compressive force is applied to these electric wires, which may damage the electric wires. In addition, the back side plate of the compression sleeve may be thickened, but in this case as well, the thick back side plate is buckled and compressed, resulting in strong compression, which may also damage the wire.

Therefore, according to the present invention, in such a compression sleeve, the shape of the sleeve main body is brought close to the cross-sectional shape of the pipe so as to contain each electric wire to be grasped, and the compression force of the sleeve main body is dispersed to both side plates. It is an object of the present invention to provide a compression sleeve for wire connection and a die that can reduce the compression force of each side plate, prevent damage to the wire, and enhance the overall gripping force of the wire.

[0005]

The invention according to claim 1 comprises a sleeve and a die for compressing the sleeve. This sleeve is formed by bending a plate-shaped sleeve body to form gripping grooves for each of the two electric wires to be connected on both sides, and inserting it in the gripping grooves of these wires in a direction perpendicular to the longitudinal direction of the electric wires. A plurality of ribs are provided at intervals from one end of the sleeve body to the other end. The outer surface of each of these ribs is a ridge, and the inner surface is a groove.
The compression die is provided with a male die having a protrusion having two curved grooves on the upper surface and a recess into which the protrusion of the male die can be inserted, and the bottom surface of the recess has two protrusions in the longitudinal direction. And a female die provided with a curved groove in cross section, and a cross section in which a protrusion of each rib enters at a position corresponding to each rib of the sleeve of the above two cross sectional curved grooves of the male die and the female die. Each of the grooves has a groove.

The invention according to claim 2 is also composed of a sleeve and a die for compressing the sleeve. In this case, however, when the plate body which is the material of the sleeve is slightly thick or the wire diameter to be gripped is small. Suitable. The sleeve is formed by bending a plate-shaped sleeve body and forming gripping grooves for two electric wires to be connected on both sides. In addition, the compression sleeve is provided with a male die having a protrusion having two curved grooves on the upper surface and a recess into which the protrusion of the male die can be inserted, and the bottom surface of the recess has two protrusions in the longitudinal direction. And a female die provided with a groove having a curved cross section.

[0007]

The compression sleeve for connecting electric wires according to claim 1 is
The end of the branch line and the trunk line are respectively inserted into the gripping grooves of the electric wire of the sleeve, and the electric wire gripping portions of the sleeve are inserted into the grooves of the two cross-section curved grooves of the concave portion of the female die of the compression die, and the male wire is inserted from above. Inserting the protrusions of the die into the recesses of the female die and compressing them, the protrusions are inserted into each of the two curved grooves in the concave portion of the female die and in each of the two curved grooves of the male die. Each wire gripping portion of the sleeve is compressed, and each wire gripping portion is compressed so as to wind around the outer circumference of each wire. At that time, the ribs on the outer side surface of the ribs of the sleeve enter the concave grooves of the dies and are not crushed by the compression.
The strength of the sleeve body is uniformly improved by the ribs provided from almost one end to the other end of the sleeve body.

Also, in the compression sleeve for wire connection according to claim 2, each wire gripping portion of the sleeve is inserted into each groove of the two cross-section curved grooves of the recess of the female die of the compression die, and the male die is inserted from above. Insert the projections of the female die into the recesses of the female die and compress them, and then insert the sleeves into the respective grooves of the double-section curved grooves of the recess of the female die and the double-section curved grooves of the male die. Each wire gripping portion is compressed, and each wire gripping portion is compressed so as to wind around the outer circumference of each wire.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a plate-shaped sleeve body 1 is prepared, and the sleeve body 1 is punched and pressed to form a plurality of sleeve bodies 1 from approximately one end to the other end in the longitudinal direction of the sleeve body 1, as shown in FIG. Book ribs 2 are provided at intervals, and notches 3 are provided at four corners in parallel with the ribs 2. The outer surface of each of these ribs 2 forms a ridge 4, and the inner surface of the rib 2 forms a groove 5. This sleeve body 1 is shown in FIG.
As shown in Fig. 5, the rib 4 has a ridge 4 on the outside, and the cross-section is substantially deformed W.
The electric wire holding grooves 6, 6 are formed on both sides by bending in a letter shape, and temporary pressing pieces 7 are provided on the outside of the cut portion 3 to form a sleeve 8.

To connect the trunk line 9 and the branch line 10 to this sleeve 8, as shown in FIG. 4, the trunk line 9 and the branch line 10 are put in the respective wire gripping grooves 6, and the respective holding pieces 7 are connected to the trunk line. Bend with a tool etc. so that 9 and the branch line 10 may be wrapped.

The die for compressing the sleeve 8 is a male die 13 shown in FIG. 5, which has a projection 12 having two curved grooves 11, 11 on its upper surface, and, as shown in FIG. The projection 12 of the male die 13 is provided with a recess 14 into which the insert 12 can be inserted, and the bottom of the recess 14 is composed of a female die 16 having two curved grooves 15 in the cross section in the longitudinal direction. A concave groove 17 having a cross section into which the protrusion 4 of each rib 2 is inserted is provided at a position corresponding to each rib 2 of each sleeve 8 of each of the above-mentioned two curved grooves 11 and 15 of the die 13 and the female die 16 respectively. It is provided.

Then, as shown in FIG. 7, the bent sleeve 8 is compressed by the male die 13 and the female die 16.

As a result, as shown in FIGS. 8 and 9, the sleeve 8 is wound around the outer circumference of the trunk line 9 and the branch line 10.
Is compressed. At that time, the male die 13 and the female die 16
The ridges 4 of the ribs 2 are not compressed by the concave grooves 17, and the plurality of ribs 2 are positioned at right angles to the longitudinal direction of the trunk line 9 and the branch line 10. Note that FIG. 9 shows the side surface of FIG. 8, and the rib 2 at the center of the back plate portion of the sleeve 8 has a straight shape without being compressed at the outer circumference, and is thicker by that amount, so that the strength is higher.

Next, FIG. 10 shows another embodiment of the present invention. This sleeve 18 has an electric wire holding groove 19 for holding a large diameter trunk line on one side and an electric wire holding groove for holding a small diameter branch line on the other side. The groove 18 is provided, and the sleeve 18 is also provided with a rib 21 similar to the rib 2 of the above-described embodiment.

11 and 12 show another embodiment of the present invention. The sleeve 22 has a large width portion 23 having a large width in the longitudinal direction on one side for holding a large diameter electric wire, and a small width portion 24 having a small width in the longitudinal direction on the other side for holding a small diameter electric wire. By bending the wire into a large-diameter electric wire grip groove 25 and a small-diameter electric wire grip groove 26 as shown in FIG.
The sleeve 22 is also provided with a rib 27 similar to the rib 2 of the above-described embodiment.

In the case of this embodiment, for a large-diameter electric wire, the electric wire holding groove 2 is long in the longitudinal direction and has a large holding area.
It is grasped by 5, and it is short in the longitudinal direction for electric wires of small diameter,
Moreover, although the electric wire grip groove 26 having a small grip area is used,
There is no need to increase the gripping force for small diameter wires,
The wire holding groove 26 also has a sufficient holding force, and the material can be saved accordingly. Further, in this way, the compression is easy without requiring an extra compression force. Further, the insulating cover to be overlaid can be downsized.

The sleeve 18 of the embodiment shown in FIG. 10 and the sleeve 22 of FIG. 12 may be wound around the outer circumference of each electric wire to be gripped in the same manner as in the above embodiment by using a mold suitable for these sleeve shapes. Can hold electric wires.

When the plate material as the material of the sleeve is slightly thick or the diameter of the electric wire to be gripped is small, a sleeve 28 having no rib on the outer periphery is prepared as shown in FIG. 13 instead of the above embodiment. When this is compressed by the male die 13 and the female die 16 used in the above-mentioned embodiment without the concave grooves 17, the sleeve 28 is wound so as to be wound around the outer circumference of each wire as shown in FIGS. 14 and 15. Hold each wire. Also in this case, a wire gripping force is high.

[0020]

According to the invention of claim 1, a plurality of ribs are provided from substantially one end to the other end of the sleeve,
Since the sleeve is compressed without compressing these ribs, the strength of the sleeve itself is high. Therefore, even if the sleeve is made of a thin material, the rib has a sufficient electric wire gripping force, so that resource saving and manufacturing cost reduction can be achieved. Further, according to the present invention, even when connecting and gripping electric wires having different diameters such as a trunk line and a branch line, it is possible to sufficiently cope with them, and a sleeve can be wound around the outer circumference of each wire to enhance the electric wire gripping force.

Moreover, the outer peripheries of the two electric wires are compressed by the inner peripheral surface of the sleeve, and at the concave groove portions of the ribs, they bite into the annular concave groove that is perpendicular to the electric wire and bulge out. Since the gaps are spaced apart, the compression portion and the bulging portion are repeated, which increases the gripping force on the electric wire.

Further, according to the invention of claim 2, the sleeve is compressed and compressed by a compression die so that each wire gripping portion is covered and compressed so as to wind around the outer circumference of the wire, so that the wire is strongly damaged without being damaged. Can be grasped. Therefore, it is suitable when the plate body which is the material of the sleeve is slightly thick or the diameter of the electric wire to be gripped is small.

[Brief description of drawings]

FIG. 1 is a perspective view of a plate-shaped sleeve body used in the present invention.

FIG. 2 is a plan view showing a state where the sleeve body used in the present invention is punched and pressed.

FIG. 3 is a perspective view of a sleeve of the present invention.

FIG. 4 is a side view showing a state in which an electric wire is inserted in the sleeve of the present invention and the electric wire is temporarily fixed by a temporary pressing piece.

FIG. 5 is a perspective view of a male die constituting the compression die of the present invention.

FIG. 6 is a perspective view of a female die constituting the compression die of the present invention.

FIG. 7 is an exploded sectional view of the sleeve of the present invention when compressed with a compression die.

FIG. 8 is a perspective view showing a state in which two electric wires are connected by the sleeve of the present invention.

FIG. 9 is a side view showing a state in which two electric wires are connected by the sleeve of the present invention.

FIG. 10 is a perspective view of a sleeve according to another embodiment of the present invention.

FIG. 11 is a perspective view showing a state in which a sleeve body used for a sleeve according to still another embodiment of the present invention is punched and pressed.

FIG. 12 is a perspective view of the sleeve of the embodiment of FIG. 11 of the present invention.

FIG. 13 is a perspective view of a sleeve according to still another embodiment of the present invention.

FIG. 14 is a perspective view showing a state in which two electric wires are connected by the sleeve of the embodiment of FIG. 13 of the present invention.

FIG. 15 is a side view showing a state in which two electric wires are connected by the sleeve of the embodiment of FIG. 13 of the present invention.

FIG. 16 is a side view showing a conventional sleeve before compression.

FIG. 17 is a side view showing a state after compression of a conventional sleeve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sleeve body 2 Rib 4 Projection 5 Recessed groove 6 Electric wire gripping groove 8 Sleeve 9 Main line 10 Branch line 11 Cross section curved groove 12 Projection section 13 Male die 14 Recessed section 15 Cross section curved groove 16 Female die 17 Recessed groove 28 Sleeve

Claims (2)

[Claims] 1. A plate-shaped sleeve main body is bent to form gripping grooves of two electric wires to be connected on both sides, respectively, and is perpendicular to the longitudinal direction of each electric wire to be inserted into these gripping grooves. A plurality of ribs in the same direction are provided at intervals from approximately one end to the other end of the sleeve main body, and each of these ribs has a ridge on the outer surface and a concave groove on the inner surface, and a rib and a compression die. This compression die consists of a combination of a male die having an upper surface with a protrusion having two curved grooves, and a recess into which the protruding portion of the male die can be inserted. And a female die having two cross-section curved grooves, and the protrusions of the ribs at the positions corresponding to the ribs of the sleeve of the two cross-section curved grooves of the male die and the female die. It has a special feature that each groove has a cross section A compression sleeve and a die for connecting electric wires. 2. A combination of a compression sleeve and a sleeve in which a plate-shaped sleeve body is bent to form gripping grooves for two electric wires to be connected on both sides, and the compression sleeve has a double-sided upper surface. A male die having a protrusion having a curved groove in cross section, a concave portion into which the convex portion of the male die can be inserted, and a female die having a bottom surface of the concave portion having two curved grooves in the longitudinal direction; A compression sleeve for wire connection and a die.