JPS5886693A - Flexible filament for burglarproofing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anti-theft device WtK, and more particularly to the structure of a nine flexible strip having an optical fiber inserted therein.

Conventionally, as a theft prevention device for a motorcycle, an optical fiber is incorporated into a flexible strip, and when in use, a structure such as a utility pole and the vehicle are connected by the flexible strip, and the fiber is inserted into the fiber. When the flexible strip is cut and the light is cut off, the cut of the flexible strip is photoelectrically detected and an alarm is activated. An excerpt has been proposed by the applicant. A flexible strip incorporating such an optical fiber needs to be constructed so that the amount of optical attenuation of the optical fiber is small and the decrease in light transmission efficiency is small. In addition, it is desirable that the optical fiber has sufficient strength and an outer diameter of an appropriate Km to prevent damage.

The present invention was made in response to the above-mentioned needs.

a first layer including an optical fiber having a flexible strip (hereinafter referred to as "lock wire") disposed in the center thereof along the axis;
The light consists of a second layer made by wrapping at least one conductive wire around the outer periphery of the first layer, and a third layer including a reinforcing material placed around the outer periphery of the second layer. To provide a lock wire for an anti-theft device that has a small attenuation filter, prevents a decrease in light transmission efficiency, maintains the optical fiber and has durability, has sufficient strength, and has an appropriately small outer diameter. It is something to do.

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

FIG. 1g1 is a block diagram showing an example of an electrical system of a power theft prevention device to which the lock wire of the present invention is applied.

The symbol l indicates a light emitting element (for example, a light emitting diode) disposed at one end of the optical fiber 21 inserted into the lock wire 2, which will be described in detail later, and a light receiving element (for example, a phototransistor) at the other end of the optical fiber 21. 0 where 3 is placed
The light emitting element 1 and the light receiving cable 3#'i are connected to the air circuit 4 at once. Electricity 1gl exposure 4 is light emitting element 1.
It drives the light-receiving element 3 and generates a stored polarization code according to the output of the light-receiving element 3. A uniformizer 5 is connected to the output side thereof, and a power supply is connected to the electric path 4 and the alarm 5. 6 are connected and power is supplied to each.

A lead 4i for connecting the light receiving element 3 and the electrical path 4
22, 22' are wound inside the lock wire 2 of the present invention, which will be described later.

The electric circuit 4 includes a transmitting circuit 41. The transmitting circuit 4a is, for example, a pulse oscillation circuit that outputs a pulse signal Pa with a predetermined period, and the light emitting element l converts an electrical signal into a corresponding optical signal. As a result, the pulse signal PaK is activated and the light pulse signal Ph is emitted and output. 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 phK 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 Pc. lI
! The Fr line detection circuit 4C detects a break in the optical fiber 21 from the pulse signals Pa and Pc1 outputted from the transmitting circuit 4a and the receiving circuit 4b. If it is satisfied, it is judged to be normal, and if it is not satisfied, it is judged to be abnormal, and in case of an abnormality, an abnormal signal Pd is output. In response to PdK, a nine drive signal Ps is output.The # signal aS is activated in response to a drive signal Ps [by a buzzer, for example, and generates *S.

FIG. 82 is an external view of an example of a power theft prevention device incorporating the electrical system shown in FIG. 1. The electrical circuit 4** shown in Figure 1 is installed in the housing 7.
s unit 5 and power supply 6 are incorporated.

One end 11s2aK of the lock wire 2 is equipped with a light emitting element l and a connector inside IIK, and a nine plug 8 is fixed thereon, and a small loop 2c is formed at the other end 2b@.
The end portion 2b is connected to the ivy wire 2 by the caulking metal fitting 9.
It is firmly caulked.

In addition, the light receiving cable 3 shown in FIG. 1 is supported and built in a capsule (not shown) so that the end part 2b is aligned with the four parts of the optical 7 eyeper 21, and the end part 2b is used for caulking as described above. It is caulked with metal fittings.

When connecting the vehicle to the utility pole 10, etc., first wrap the lock wire 2 around the utility pole 10, then insert the plug 8 into the small roof 2C, and then insert the plug 8 into the socket of the housing 7).
In FIG. 2, reference numeral 12 is the ninth lock that prevents the plug 8 and the socket 11 from coming apart.

Next, the lock wire 2 according to the present invention #iK used as described above will be explained based on FIGS. 4 and 5.

4 and 5 show the lock wire 2, which is held in the center of the lock wire 2. Compatible with synthetic resin as Is material! (e.g. polyvinyl chloride, polyethylene, etc.).

The light 7 eyeper 21 covered by the axis 1jilK
It was arranged and the jig! For example, two leads @ 22, 22' (covered with an insulating material such as synthetic resin) are wrapped or wound. On the outside of the lead fm22.22', there is a nine-fold wire (for example, seven) twisted with a plurality of steel wires (for example, seven) through a synthetic resin coating 24.
For example, 10 strands 25 are wound, and the outside of the strands 25 is covered with a synthetic resin covering (for example, polyvinyl chloride) 27 as an outer skin member.

As mentioned above, the optical fiber 21 is inserted in a straight line at the middle 6 part, and there is no bending due to heating, and it passes through the shortest distance and has a weight of 5 g.
The optical pulse signal Ph shown in FIG. 1 can be transmitted, and the loss in the output of the optical pulse signal can be reduced. Also, the optical fiber 21 is 411g23゜24.27 strand 25
The image is preserved with @ and marked with K to prevent it from being easily cut. Further 4C,! J-do @22, 22' with lock wire 2
It can be easily taken out from the end of the terminal, making terminal processing easy.

Further, the number of lead wires 22 and 22' is not limited to two as shown in the illustrated example, and for example, one lead wire may be used so that current also flows through the strand 25.

It should be noted that the number of strands 25, the pattern of the strands 26, the way they are laid, etc. can be selected arbitrarily, taking into consideration the strength of the outer diameter 1 of the four-wire wire 2, etc.

According to the lock wire of the theft prevention device of the present invention having the above-described structure, the optical fiber is disposed axially in the center of the lock wire, so that the total length of the optical fiber is shortened and the amount of light loss is reduced. It is possible to eliminate twisting of the optical fiber and prevent a decrease in light transmission efficiency, protect the optical fiber and increase durability, and have sufficient strength and a suitably thin outer diameter. You can. Furthermore, terminal treatment of the conductive wire is also easy.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of an electrical system of a separation preventing device to which the flexible strip of the present invention is applied. Fig. 2 is an external view showing an example of the use of a flexible strip, and Fig. 3 is an external view of an example of mounting an anti-theft device. FIG. 4 shows a cross-sectional view of the flexible strip, and FIG. 5 shows a cut-away side view of the flexible strip. 1... Light emitting element, 2... Flexible strip (G wire), 3... Light receiving element, 4... Electric L path, 5... Alarm device, 21... Optical fiber, 22.22'-Lead@, 23,24゜27...Synthetic #fat coating, 25...
strand. Figure 5

Claims (1)

[Scope of Claims] 1. A flexible strip with an optical fiber inserted therethrough, so as to photoelectrically detect the cutting of the flexible strip and issue a notification.
The anti-theft device includes: a first layer including an optical 7-eyeper disposed at the center with an axis -Kffi; a second layer formed by wrapping at least one conductive wire around the outer periphery of the first layer; 1. A flexible strip for an anti-theft device, comprising three IK layers arranged on the outer periphery of the second layer and including a reinforcing member. 2. The flexible strip of the theft prevention device according to claim 1, wherein each of the reinforcing members is made of a plurality of strands formed by twisting a plurality of J141A11i.