JPS6255196B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anti-theft device, and more particularly to the structure of a flexible strip that is included in such an anti-theft device and has an optical fiber inserted therein.

Conventionally, as a theft prevention device for a vehicle, especially a motorcycle, one end side of a flexible strip through which an optical fiber and a conductive wire are inserted is used as a theft prevention device (the motorcycle).
and the other end is connected to a predetermined locking member (for example, a utility pole), and furthermore, one end of the optical fiber is provided with a transmitting means (light-emitting element), and the other end is provided with a receiving means (light-receiving element). The anti-theft device is configured to photoelectrically detect the cutting of the flexible strip based on signals exchanged between the receiving means and the transmitting means via the conductive wire and issue an alarm. has been proposed by the applicant (for example, Japanese Patent Application No. 161844/1983).

In this case, as described in the above specification, the flexible strip body incorporating optical fibers automatically locks the anti-theft object so that the anti-theft object is firmly connected to the locking member. In cases where storage space is limited, such as in a motorcycle, the outer diameter must be appropriately small, have sufficient strength to withstand harsh use, protect optical fibers that are easily damaged, and be available at a low cost. It is desirable that the following be satisfied.

The present invention was made in response to the above-mentioned demands, and provides a flexible wire (hereinafter referred to as a lock wire).
a first strip body made of the optical fibers arranged in the axial direction and at least one of the conductive wires twisted together at a pitch larger than the axial diameter;
a second strip body including a reinforcing member wound so as to be in direct contact with the outer periphery of the strip body, the reinforcing member being formed of a plurality of strands each made of a plurality of twisted steel wires; The first strip body and the second strip body
This anti-theft device is characterized by filling the space between the strip and the strip with a synthetic resin that is ductile when heated and melted, and is flexible after hardening. It provides a lock wire.

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

FIG. 1 is a block diagram showing an example of the electrical system of an anti-theft device to which the lock wire of the present invention is applied.

Reference numeral 1 indicates a light emitting element (e.g., a light emitting diode) disposed at one end of an optical fiber 21 inserted into a lock wire 2 (described in detail later), and a light receiving element (e.g., a phototransistor) 3 is disposed at the other end of the optical fiber 21. It is arranged. The light emitting element 1 and the light receiving element 3 are electrically connected to an electric circuit 4, respectively. The electric circuit 4 drives the light-emitting element 1 and the light-receiving element 3 and also generates an alarm signal according to the output of the light-receiving element 3. An alarm 5 is connected to the output side of the electric circuit 4. are connected to a power source 6 so that power is supplied to each of them. Incidentally, lead wires 22, 22' connecting the light receiving element 3 and the electric circuit 4 are wound inside the lock wire 2 of the present invention, which will be described later.

The electric circuit 4 includes a transmitting circuit 4a, a receiving circuit 4b, a disconnection detection circuit 4c, and a driving circuit 4d. The transmitting circuit 4a is, for example, a pulse oscillation circuit and outputs a pulse signal Pa of a predetermined period. The light emitting element 1 converts an electrical signal into a corresponding optical signal, and is a pulse signal.
It operates according to Pa and emits a light pulse signal Ph. This optical pulse signal Ph is transmitted into the optical fiber 21. The light receiving element 3 converts an optical signal into a corresponding electric signal, and outputs an electric pulse signal Pb corresponding to the optical pulse signal Ph input from the optical fiber 21. The receiving circuit 4b receives and detects the signal Pb from the light receiving element 3 and outputs a corresponding pulse signal.
Output PC. The disconnection detection circuit 4c is the transmission circuit 4
a, pulse signal output from the receiving circuit 4b
It detects a break in the optical fiber 21 using Pa and Pc. For example, it takes an AND condition between signals Pa and Pc, and if the conditions are satisfied, it is determined to be normal, and if not, it is determined to be abnormal. It is designed to output an abnormal signal Pb. Drive circuit 4
d is for activating the alarm device 5, and outputs a drive signal Ps according to the input signal Pb. Alarm 5
For example, a buzzer is activated in response to the drive signal Ps to generate an alarm.

FIG. 2 is an external view of an example of an anti-theft device incorporating the electrical system shown in FIG. 1. The electrical circuit 4, alarm 5, and power source 6 shown in FIG. 1 are incorporated into the housing 7, and the housing 7 is firmly fixed to the side surface of the rear cowl 14 below the seat 13 of the motorcycle shown in FIG. 3, for example. has been done. One end 2a of lock wire 2
A plug 8 with a light emitting element 1 and a connector mounted therein is fixedly installed, a small loop 2c is formed on the other end 2b side, and the end 2b is firmly fixed to the lock wire 2 by a caulking metal fitting 9. It is caulked to. The light-receiving element 3 shown in FIG. 1 is supported at the end 2b so as to be aligned with the end of the optical fiber 21, and is housed in a capsule (not shown). It is twisted and caulked.

When connecting a vehicle to a utility pole 10, etc., first wind the lock wire 2 around the utility pole 10, then insert the plug 8 into the small loop 2c, and then insert the plug 8 into the small loop 2c.
It is sufficient to attach it to the socket 11 of the housing 7. still,
In Fig. 2, numeral 12 indicates plug 8 and socket 1.
This is a lock to prevent separation from 1.

Next, an embodiment of the lock wire according to the present invention used as described above will be described with reference to FIGS. 4 and 5.

4 and 5 show a lock wire 2 according to an embodiment of the present invention, which includes an optical fiber 21 coated with a coating 23 of synthetic resin (for example, polyvinyl chloride, polyethylene, etc.);
For example, two lead wires 22, 2 as conductive wires
2' are twisted at a pitch larger than their respective shaft diameters, and on the outer periphery of this first thread there are a plurality of second threads (for example, seven).
A plurality of (for example, six) strands 26 made of twisted steel elements 25 are wound around the outer periphery of the second strand, and a synthetic resin (for example, polyvinyl chloride) coating 27 is provided as an outer skin member on the outer periphery of the second strand. It is formed by coating. Here, a synthetic resin coating material 24 is filled between the two strips, and this coating material 24 spreads between the two strips when heated and melted, and becomes flexible after hardening. Therefore, the synthetic resin covering material 24 covers the strand 26, the optical fiber 21, and the lead wire 2.
The space between the strands 2 and 22' is filled without any gaps, and the outer periphery of the shaft core has a shape corresponding to the shape of the inner surface of the strand 26.

As mentioned above, since the synthetic resin coating material 24 covering the optical fiber 21 and the lead wires 22, 22' is filled inside the strand 26, the space can be used effectively and the lock wire 2 can be The outer diameter can be made small, and the optical fiber 21 and lead wires 22, 22' can be protected so that they can withstand frequent use and are not easily cut. Furthermore, the lead wires 22, 22' can be easily taken out from the ends of the lock wire 2, making it easy to process the ends.

Note that the number of lead wires 22, 22' is not limited to the two shown in the illustrated example, and for example, only one lead wire 22 may be used as, for example, a positive conducting wire, and the strand 26 may be used, for example, as a negative conducting wire.

Furthermore, various selections can be made for the number of strands 26, the number of wires 25, the way of twisting, etc., but the lock wire 2
It can be arbitrarily selected in consideration of the outer diameter, strength, etc.

As described above, according to the present invention, one end side of a flexible strip through which an optical fiber and a conductive wire are inserted is connected to an object to be anti-theft, and the other end side is locked to a predetermined locking member, and , by providing a transmitting means at one end of the optical fiber and a receiving means at the other end, the flexible strip body can be transmitted and received based on a signal transmitted and received between the receiving means and the transmitting means via the conductive wire. In the anti-theft device, the optical fiber disposed in the axial direction and at least one
A first strip body made of conductive wires twisted together at a pitch larger than the shaft diameter, and a second strip body including a reinforcing member wound so as to be in direct contact with the outer periphery of the first strip body. The reinforcing member is formed of a plurality of strands, each of which is formed by twisting a plurality of steel wires, while the first strip body and the second strip body have ductility when heated and melted. Moreover, since it is structured to be filled with flexible synthetic resin after curing, the object to be anti-theft is firmly connected to the locking member. By spreading the resin, mutual insulation between the two strips can be effectively achieved, the outer diameter of the lock wire can be made small, the optical fiber, etc. is less likely to be damaged, it can withstand frequent use, and the lock wire itself can have sufficient strength. Further, the terminals of the conductive wire can be easily processed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the electrical system of an anti-theft device to which the flexible strip of the present invention is applied;
Figure 2 is an external view showing an example of the use of flexible strips;
The figure shows an external view showing an example of mounting an anti-theft device, FIG. 4 shows a cross-sectional view of the flexible strip, and FIG. 5 shows a cutaway side view of the flexible strip. DESCRIPTION OF SYMBOLS 1... Light emitting element (transmission means), 2... Lock wire (flexible strip), 3... Light receiving element (receiving means), 5...
Alarm device, 21... Optical fiber (first strip body), 22,
22'...Lead wire (first strip body), 24...Synthetic resin,
26...Strand (second strand).

Claims (1)

[Claims] 1. One end side of the flexible strip through which the optical fiber and the conductive wire are inserted is connected to the anti-theft object, and the other end side is locked to a predetermined locking member, and
By providing a transmitting means at one end of the optical fiber and a receiving means at the other end, the flexible strip can be activated based on a signal exchanged between the receiving means and the transmitting means via the conductive wire. In an anti-theft device that photoelectrically detects cutting and issues an alarm, the optical fibers and at least one conductive wire arranged in the axial direction are twisted together at a pitch larger than the shaft diameter. a first strip body consisting of a first strip body, and a second strip body including a reinforcing member wound so as to be in direct contact with the outer periphery of the first strip body,
The reinforcing member is formed of a plurality of strands, each of which is formed by twisting a plurality of steel wires;
1. A flexible strip for an anti-theft device, characterized in that a synthetic resin is filled between the strip and the second strip, which is ductile when heated and melted, and is flexible after hardening.