JPH05190055A - Telescopic linear switch - Google Patents

Abstract

PURPOSE:To provide an elastic linear switch which facilitates winding wiring along a winding portion and different steps. CONSTITUTION:Conductive wires are wound as spiral-like or plain stitch-like around narrow belt-like cores 1 made of elastic polymer so as to form elastic contact wires 3a, 3b. The contact wires 3a, 3b are arranged facing each other with such a spacing 4 that the contact wires 3a, 3b are put in connection by pressing, and are held shape and covered by polymer insulating material 5 so as to form a long shape switch body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to a telescopic linear switch,
More specifically, the present invention relates to a linear switch that can be bent and bent in the facing direction of contact lines.

[0002]

2. Description of the Related Art As a linear switch of this type, the actual switch 6
There is a publication of 2-100644. This publication describes a line (linear) switch in which contact lines are arranged with a pressure-conductive elastic body sandwiched therebetween and covered with a cord member such as silicon rubber.

[0003]

However, although the linear switch of the publication can be bent in the lateral direction in a curved manner, one of the contact switches is bent in the opposite direction due to the circumferential difference. Therefore, there is a problem that it is not possible to energize between the contact lines.

Therefore, when wiring is carried out along the outer surface of a bumper having a bent portion for preventing collision of an automatic guided vehicle, or when wiring is carried out along the top surface of a stepped gate fence for preventing theft, the bent portion However, there is a problem that the linear switch has to be cut at the step portion and the cut portion has to be connected by a lead wire.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a conductive wire is spirally or flatly knitted around a strip-shaped core wire made of a stretchable polymer to form a contact wire that expands and contracts, and the contact wire is electrically conductive under pressure. Arranged facing each other with a space between them, shaped and covered with a polymer-based insulator to form a long switch body,
It is intended to solve such a problem.

[0006]

In the telescopic type linear switch of the present invention, for example, when wiring is carried out along the outer surface in the longitudinal direction of the bumper having the bent portion of the automatic guided vehicle, the contact lines are wired inward and outward.
The bent portion of the bumper corresponds to the bent portion by extending along the bent portion, and the contact lines are wired while leaving a space for conducting pressure.

[0007]

Embodiments Embodiments will be described below with reference to the drawings.

1A and 1B show a first embodiment, in which a thin strip-shaped core wire 1 made of a stretchable polymer is spirally wound with a copper foil wire 2a formed in a flat shape as a conductive wire. , Or the flat weaving wire or the flat knitting wire 2b that is knitted in a tubular shape is tightly inserted to form the contact wires 3a and 3b that expand and contract, and the contact wires 3a and 3b are separated by pressure (1.0 to 1.5
mm) 4 is placed and wiring is performed in a face-to-face manner, and the stretchable linear switch 6 is formed by holding and covering the shape with an elastic insulator 5 made of polyurethane or olefin elastomer.

As shown in FIG. 2, this telescopic type linear switch 6 is attached by wiring along the outer surface in the longitudinal direction of the bumper 8 having the bent portions 8a and 8b of the automatic guided vehicle 7, for example. At the bent portions 8a and 8b, the linear switch 6 extends and the inner and outer contact wires
The wiring will be wired between 3a and 3b with the same pressure conductive gap as the straight line portion, and if one point on the extension of the linear switch 6 comes into contact with another object due to running, the pressure conductive conduction will occur between the contact lines 3a and 3b. Then, the stop mechanism (not shown) of the transport vehicle 7 is operated to stop the unmanned transport vehicle 7 to ensure safe traveling, and to prevent the load from collapsing or being damaged.

FIG. 3 shows a strip-shaped core wire 1, a copper foil wire 2a, and a flat braided wire 2b.
An example is shown in which a tough yarn 9 made of polyester twisted yarn or aramid fiber is wound between and. When the yarn 9 for a brake is wound, the yarn 9 is stretched as the contact lines 3a and 3b are stretched, and the tension reaches a limit at a stretch of about 2 times and the stretch is stopped. 2a and the flat braided wire 2b are prevented from cutting.

Further, FIG. 4 shows an example in which concave V-shaped concave grooves 1a and 1b are provided on both sides of the strip-shaped core wire 1 in the longitudinal direction so that the copper foil wire 2a is not detached by the elastic action of the concave grooves 1a and 1b. Is shown.

FIG. 5 shows an example in which the pressure-conductive rubber 10 is sandwiched between the contact lines 3a and 3b.

For the purpose of use in which the degree of expansion and contraction is relatively small, only one of the contact lines 3a and 3b facing each other may be made of an elastic body and the other contact wire may be made of a non-elastic body.

[0014]

As described above, according to the present invention, the linear switch can be bent in a plane meandering manner and can be bent in the relative direction of the contact lines while maintaining a pressure-conductive conduction interval. There is an effect that the linear switch can be wired without cutting along the top surface of the bumper or the gate fence with steps.

Since the linear switch is of a telescopic type, it has the effect of facilitating the bent wiring.

[Brief description of drawings]

FIG. 1A is a perspective view showing a linear switch using a copper foil wire as a conductive wire, and FIG. 1B is a perspective view showing the linear switch using a flat braided wire.

FIG. 2 is a perspective view showing a usage example in which wiring is attached to a bumper of an automatic guided vehicle.

FIG. 3 is an enlarged cross-sectional view of a bent portion of the bumper.

FIG. 4 is a perspective view showing an example in which a thread for braking is wound between a strip-shaped core wire and a copper foil wire.

FIG. 5 is an end view showing another example of the strip-shaped core wire.

FIG. 6 is a cross-sectional view showing an example in which a conductive rubber under pressure is sandwiched between contacts.

[Explanation of symbols]

 1 is a strip-shaped core wire 2a is a copper foil wire 2b is a plain woven wire, flat braided wires 3a and 3b are contact lines 4 are gaps 5 are insulators 6 are linear switches 7 are unmanned vehicles 8 are bumpers 8a, 8b are bumpers Bent part 9 is a thread for braking 10 is a conductive rubber under pressure

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsutaka Furuta 6-1, 1-1 Heiwajima, Ota-ku, Tokyo Nobuaki Sangyo Co., Ltd. (72) Inventor Hironobu Goto 6-1-1, Heiwajima, Ota-ku, Tokyo Stock Company Shinmei Sangyo

Claims (5)

[Claims] 1. A contact strip that expands and contracts is formed by winding an electrically conductive wire in a spiral or flat knitted form on a thin strip-shaped core wire made of a stretchable polymer, and the contact wire is placed face-to-face with a space for conducting pressure. Then, a stretchable linear switch characterized in that it is shaped and covered with a polymer-based insulator to form a long switch body. 2. The telescopic linear switch according to claim 1, wherein one of the contact wires is formed of a non-elastic material. 3. The telescopic linear switch according to claim 1, wherein a yarn for braking is wound between the thin strip-shaped core wire and the conductive wire. 4. The telescopic linear switch according to claim 1, wherein the strip-shaped core wire is provided with concave grooves on both sides in the longitudinal direction. 5. The telescopic linear switch according to claim 1, wherein a pressure-conductive rubber is sandwiched between opposing contact lines.