JPH06104038A - Continuous tool for covered wire - Google Patents

Abstract

PURPOSE:To enable sure electric continuity by a simple operation without largely damaging a coating by inserting a covered conductor to a groove on the top end, and bringing a metal needle provided movably in the groove direction into contact with an internal conductor through the coating. CONSTITUTION:An operation part 20 is preliminarily moved backward so that the top end part of a first member 16 and the metal needle 19 of a second member 18 are never protruded into the groove 15 of an envelope 11. When a covered conductor 14 is inserted into the groove 15, and the operation part 20 is released, the top end part of the member 16 is protruded by a first coil spring 22 to press and fix the conductor 4, the member 18 is energized in the groove 15 direction by a second coil spring 23, and the metal needle 19 is pierced to the internal conductor of the conductor 14 and electrically connected. At separating, the operation part 20 is moved backward, whereby the metal needle 19 is separated from the conductor 14 through the member 18, and further brought into contact with a projection 172 to move the member 16 backward, and the top end releases the conductor 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductor for a covered electric wire, which is connected in the middle of a laid electric wire to obtain a temporary electric connection between another conductor and an inner conductor of the covered electric wire. It concerns equipment.

[0002]

2. Description of the Related Art Conventionally, in the case of electrically conducting an inner conductor of a covered electric wire in the middle of a covered electric wire laid, a first example thereof is shown in FIGS. 6 (a) and 6 (b). the portion of the coating 2 of covered wire 1 or connecting the tool 3 other connection conductor to perform a continuity to the inner conductor 4 to the inner conductor 4 of 怦 exposed by peeling or the like 5 (or such wire), the Alternatively, as shown in the second example in FIGS. 7A and 7B, the coating 201, 202 of the coated electric wires 101, 102 is broken by the conducting metal 7 housed in the insulator 6 to break the internal conductor. The inner conductor 4 is in contact with 401 and 402 and is made of metal 7
01 and 402 were connected.

[0003]

According to these methods, a special tool may be required to perform the connecting work, a large scratch remains on the coating when the connecting conductor is removed, and insulation is also caused. There is a problem that post-treatment such as covering the covered electric wire with an insulating tape is necessary to maintain the strength, which requires a lot of time and labor.
At the same time, it had the drawback of impairing aesthetics.

The present invention has been made in view of the above circumstances, and does not require special measures when the connecting conductor is removed, and provides reliable electrical conduction with a simple operation. It is an object of the present invention to provide a conducting device for a covered electric wire capable of performing the above.

[0005]

In order to solve the above-mentioned problems, the present invention has a cylindrical envelope having a groove into which a covered electric wire is inserted at its tip, and an axial movement in the envelope. A tubular first member that is freely provided and has a tip protruding into the groove, a first spring that biases the first member in the groove direction, and the first member. A second member that is movably provided in the axial direction and has a metal needle projecting into the groove at the tip end thereof; a second spring that biases the second member in the groove direction; And an operating portion that is provided integrally with the member of (1) and that is operated from outside the envelope so that the metal needle is housed in the first member.

[0006]

According to the present invention, the covered wire is fixed by the first member which is biased by the first spring, and the pressure of the second spring which biases the second member having the metal needle at its tip is applied by the metal needle. Penetrates the coating of the covered electric wire with fine holes and contacts the inner conductor with a predetermined contact force to obtain stable electrical conduction between the metal needle and the inner conductor of the covered electric wire. It is designed to minimize scratches. That is, in order to obtain good conduction between the metal needle and the inner conductor of the covered electric wire, a constant contact force is applied by the second spring, and the metal needle is not damaged even if an external impact is applied to the covered electric wire. Or a first member that sufficiently presses and holds the covered electric wire with the first spring so that the electrical continuity between the metal needle and the inner conductor of the covered electric wire is not lost. When the metal needle is removed from the cover, the covered wire is pressed, and the metal needle is detached from the covered wire before releasing the covered wire from the first member that holds the wire, thereby damaging the metal needle even if an impact is applied from the outside. There is no such thing.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view showing an embodiment of the present invention, and FIG. 3 is an enlarged perspective view showing a tip portion of the embodiment of the present invention. FIG. 4 is a half sectional plan view showing an embodiment of the present invention, and FIG. 5 is a sectional side view showing an embodiment of the present invention. That is, the tubular envelope 1
1 has a conical tubular shape on the front end side and a member mounting portion 12 having an inner surface screwed on the rear end portion, and both sides of the envelope 11 have member mounting portions from the intermediate portion to the rear end portion. 12
A slit 13 is provided over the area. The envelope 11
A groove 15 into which the covered electric wire 14 is inserted is provided at the tip of the. A cylindrical first member 16 is provided inside the envelope 11.
Is provided movably in the axial direction so that the tip portion can project into the groove 15. Protrusions 171 and 172 are provided on the outer peripheral portion of the first member 16 at predetermined intervals. A second member 18 is provided inside the first member 16 so as to be movable in the axial direction, and a metal needle 19 projects from the first member 16 at the tip of the second member 18. It is attached so that it can project into the groove 15. A plate-shaped operation portion 20 is integrally provided on the second member 18 by a pin 27, and the pin 27 is inserted into the slit of the first member 16 so as to be movable in the axial direction. The operation portion 20 is provided movably in the axial direction in the slit 13 so as to project outside the envelope 11, and a part of the operation portion 20 is a protrusion portion 1 of the first member 16.
It is inserted between 71 and 172 so as to be axially movable. A cap member 21 is screwed and attached to the member attaching portion 12 of the envelope 11.
A first coil spring 22 is attached between the first member 16 and the first member 16 so as to bias the first member 16 toward the groove 15 and between the cap member 21 and the second member 18. The second coil spring 23 is attached to the second member 18
Is attached so as to urge it toward the groove 15. A cap 25 having a through hole 24 is fitted to the cap member 21, and a conductive wire 26 is electrically connected to the metal needle 19 and led out through the through hole 24 of the cap 25.

That is, first, a case will be described in which the instrument of this embodiment is attached to a laid covered electric wire to conduct electricity.
The operation portion 20 is moved backward to move the first member 16 and the second member 18 backward, and the metal needle 19 and the first member 1 are moved.
The tip of 6 does not project into the groove 15 of the envelope 11. In this state, as shown in FIG.
When the covered electric wire 14 is inserted into the groove 15 and the operation portion 20 is released, the first coil spring 22 urges the first member 16 toward the groove 15, and the tip end portion of the first member 16 moves into the groove. 1
5, the covered electric wire 14 is pressed and fixed, the second member 18 is biased in the direction of the groove 15 by the second coil spring 23, and the metal needle 19 protrudes from the first member 16 and enters the groove 15. And is pierced into the inner conductor of the covered electric wire 14 to be electrically connected.

Next, the case where the instrument of this embodiment is removed from the laid covered electric wire will be described. First member 1
When the distal end of 6 presses and fixes the covered electric wire 14 and the metal needle 19 is pierced into the inner conductor of the covered electric wire 14 to be electrically connected, when the operation unit 20 is moved rearward, the operation unit 20 is first moved. Since the second member 18 is moved backward by moving backward between the protrusions 171 and 172 of the first member 16, the metal needle 19 is detached from the covered electric wire 14. When the operation unit 20 is further moved rearward, the operation unit 20 contacts the rear projection 172 of the first member 16 to move the first member 16 rearward, and the tip end of the first member 16 is covered by the covered electric wire. Leave from 14.

As described above, the metal needle 19 is attached to the covered electric wire 14
After being separated from the cover, the tip of the first member 16 is attached to the covered electric wire 1.
By detaching from No. 4, the metal needle 19 can be detached from the covered electric wire 14 in a state where the covered electric wire 14 is fixed at the tip portion of the first member 16, so that the metal needle 19 is not damaged.

Further, the pressure for fixing the coating of the covered electric wire and the contact force between the inner conductor of the covered electric wire and the metal needle act independently of each other. Therefore, the pressure for fixing the sheath of the covered electric wire is sufficiently strong, and the force of breaking the sheath of the covered electric wire and contacting the inner conductor may be sufficiently weak within the limit of maintaining the reliability of electrical conduction. it can.

[0013]

As described above, according to the present invention, reliable electrical continuity can be obtained by a simple operation without significantly damaging the coating of the covered electric wire. For this reason,
By connecting this device in the middle of the covered electric wire that has been laid, for example, there is an advantage that the signal flowing through the electric wire can be measured in addition to the test for the presence or absence of mixed wires of the covered electric wire, the measurement of the insulation resistance, and the like. It is convenient to use when temporarily short-circuiting the device connected to the existing wiring.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an embodiment of the present invention.

FIG. 3 is an enlarged perspective view showing a tip portion of an embodiment of the present invention.

FIG. 4 is a half sectional plan view showing an embodiment of the present invention.

FIG. 5 is a sectional side view showing an embodiment of the present invention.

FIG. 6 is a configuration diagram showing an example of a conventional conduction method for a covered electric wire.

FIG. 7 is a configuration diagram showing another example of a conventional conduction method for a covered electric wire.

[Explanation of symbols]

11 ... Envelope, 12 ... Member mounting portion, 13 ... Slit, 1
4 ... Coated electric wire, 15 ... Groove, 16 ... First member, 171,
172 ... Projection, 18 ... Second member, 19 ... Metal needle, 2
0 ... Operation part, 21 ... Cap member, 22 ... First coil spring, 23 ... Second coil spring, 24 ... Through hole, 25 ... Cap, 26 ... Conductive wire, 27 ... Pin.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiro Oba 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Akino Shino 1-15-8 Kamikowa, Suginami-ku, Tokyo (72) Inventor Eiji Saito 6-1 Nakanouchi, Kohata, Towa-cho, Adachi-gun, Fukushima Prefecture

Claims (1)

[Claims] 1. A cylindrical envelope having a groove into which a covered electric wire is inserted at a tip portion, and an axially movably provided inside the envelope so that the tip portion projects into the groove. A cylindrical first member, a first spring for urging the first member in the groove direction, and a groove provided at the tip end portion movably provided in the first member in the axial direction. A second member having a metal needle protruding in the direction, a second spring for urging the second member in the groove direction, and the metal needle integrally provided with the second member,
And an operating portion operated from outside the envelope so as to be housed in the member.