JPS61153797A - Flexible filamentous body for crime preventor - 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 (Industrial Application Field) The present invention is an anti-theft device that photoelectrically detects the breakage of a flexible strip (lock wire) that incorporates optical fibers and conductive wires and issues an alarm. The present invention relates to the flexible strip of the device.

(Prior art and its problems) Conventionally, when a vehicle (particularly a motorcycle) is parked, an immovable structure such as a utility pole and the vehicle are connected by a flexible strip having optical fibers and conductive wires incorporated therein. With,
When an optical signal from the light emitting element is input to the light receiving element via the optical fiber, and the optical signal from the light emitting element is no longer input to the light receiving element due to the flexible strip being cut, the corresponding An anti-theft device that photoelectrically detects cutting of a flexible strip and activates an alarm is known as disclosed in Japanese Patent Application Laid-Open No. 58-62791 filed by the present applicant.

The flexible strips used in such conventional anti-theft devices are
A first layer consisting of an optical fiber coated with a coating member made of a synthetic resin film in the center and arranged along the axis, and two conductive wires around the outer periphery of the first layer. A 27il is formed by twisting and winding together with a plurality of auxiliary cords of the same diameter, and covering the outside of these conductive wires and auxiliary cords with a covering member made of a synthetic resin film, and a plurality of auxiliary cords are wrapped around the outer periphery of the second layer. Wrapped with multiple strands made of twisted steel wire,
A third layer is formed by covering the outside of these strands with a covering member made of a synthetic resin film, and a second layer includes a conductive wire.
The layer was firmly sandwiched between the first layer and the third layer.

Therefore, the conductive wire provided in the second layer has a small degree of freedom for movement in the twisting direction, and if a large bending force exceeding this degree of freedom is applied, the conductive wire will be moved by the tensile force acting in the axial direction. The flexibility of the flexible strip is set so that the flexible strip can only be bent within a range that does not exceed the degree of freedom. For this reason, there is a limit to reducing the winding diameter when the flexible strip is wound into a loop shape and stored.

(Object of the Invention) The present invention has been made in view of the above circumstances, and provides a flexible anti-theft device that can be stored in a compact manner by reducing the winding diameter when it is wound in a loop shape and stored. The purpose is to provide sexual striae.

(Measures 11 for Solving the Problems) In order to solve the above-mentioned problems, in the present invention, a 1N layer including an optical fiber disposed along the axis in the center, and a layer disposed on the outer periphery of the first layer. It is characterized by comprising a second layer in which at least one conductive wire and a plurality of reinforcing wires are wound together.

(Example) An embodiment of the present invention will be described below based on the drawings.

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

In the figure, reference numeral 1 denotes a light emitting element (for example, a light emitting diode), which is disposed at one end of an optical fiber 3 inserted through a flexible strip 2 of the present invention, the details of which will be described later, and at the other end of the optical fiber 3. A light receiving element (for example, a phototransistor) 4 is provided. These light emitting element 1 and light receiving element 4 are electrically connected to an electric circuit 5, respectively. The electric circuit 5 drives the light emitting element 1 and the light receiving element 4, and also drives the light receiving element 4.
An alarm signal is generated according to the output of the alarm 6, and an alarm device 6 is connected to the output side of the alarm signal. A power source 7 is connected to the electric circuit 5 and the alarm 6. Incidentally, a lead wire (conductive wire) 8.8 connects the light receiving element 4 and the electric circuit 5.
+ is wound inside the flexible strip 2 of the present invention.

The electric circuit 5 includes a transmitting circuit 5a, a receiving circuit 5b, a disconnection detection circuit 5C, and a driving circuit 5d.

The transmitting circuit 5a is, for example, a pulse oscillation circuit, and outputs a pulse signal Pa having a predetermined period. The light emitting element 1 converts an electrical signal into a corresponding optical signal, operates in response to the pulse signal Pa, and emits a light pulse signal Ph. This optical pulse signal Ph is input to the light receiving element 4 via the optical fiber 3. The light receiving element 4 converts an optical signal into a corresponding electrical signal, and outputs an electrical pulse signal pb corresponding to the optical pulse signal ph input from the optical fiber 3. The receiving circuit 5b receives and detects the signal pb from the light receiving element 4 and outputs a corresponding pulse signal Pc. The disconnection detection circuit 5C detects a disconnection in the optical fiber 3 using the pulse signals Pa and Pc output from the transmitting circuit 5a and the receiving circuit 5b, respectively. If it is satisfied, it is determined to be normal, and if it is not satisfied, it is determined to be abnormal, and when abnormality occurs, an abnormality signal Pd is output. The drive circuit 5d is connected to the alarm device 6.
It outputs a drive signal Ps according to an input signal Pd. The alarm device 6 is, for example, a buzzer, and operates in response to the drive signal Ps to generate an alarm.

FIG. 4 is an external view of an anti-theft device incorporating the electrical system shown in FIG. 7 are respectively assembled, and this housing 9 is firmly fixed at a predetermined position of a vehicle (motorcycle) 10, as shown in FIG.

As shown in FIG. 2, a strong connection plug 11 made of metal is fitted and fixed to one end 2a of the flexible strip 2 of the present invention, and the light emitting element 1 is mounted inside the plug 11. A small loop 12c is formed at the other end 2b?jlJ of the flexible strip 2, and the other end 2b is attached to the caulking metal fitting 12.
It is firmly caulked to the flexible strip 2 by. The light-receiving element 4 is supported at the other end 2b of the flexible strip 2 so as to be aligned with the end of the optical fiber 3, and is housed in a capsule (not shown). 2b is caulked with a caulking metal fitting 12.

The connection plug 11 and the housing 9 each have a locking means, and once the plug 11 is inserted into the housing 9 and locked, the locking function is 1! The locking of the plug 11 cannot be released without manual operation.

A connector (none of which is shown) that engages with the connector of the plug 11 is attached to the housing 9, and when the plug 11 is inserted and locked into the housing 9, the electric circuit 5 and the light emitting element 1 are connected to each other. and the light receiving element 4 are electrically connected to each other.

When connecting the vehicle IO to a structure 13 such as a utility pole, first wrap the flexible strip 2 around the structure 13 as shown in FIG. 4, then insert the plug 11 into the small loop 2C, and then The plug 11 is attached to the socket of the housing 9 and connected in a lasso style.

After connecting in this way, follow step 1 above! Unless the flexible strip 2 is unlocked by an operation, it is difficult to release the vehicle lO without cutting the flexible strip 2 with a wire cutter or the like. If it is disconnected, the alarm device 6 is activated to issue an alarm.

In this case, if at least one of the optical fiber 3 and lead wires 8 and 81 inserted into the flexible strip 2 is cut, the disconnection detection circuit 5C detects an abnormality and issues an alarm. It will be done.

Next, the flexible strip 2 according to the present invention used as described above will be explained based on FIGS. 5 and 6.

FIG. 5 shows a cross section of the flexible strip 2.
An optical fiber 3 coated with a coating member 14 made of a synthetic resin film (for example, polyvinyl chloride, polyethylene, etc.) is disposed along the axis at the center of the coating member I4. The lead wires 8 and 81 are connected to a plurality of wires having approximately the same diameter as these lead wires 8 and 81 (for example, 8
The reinforcing wire 15 is wound around the reinforcing wire 15, and the outside of the lead wire 8.81 and the reinforcing wire 15 is covered with a covering member 16 made of a synthetic resin film (for example, polyvinyl chloride). The reinforcing wire 15 includes a plurality of (for example, seven) steel wires 1.
It is made by twisting 51.

As mentioned above, the optical fiber 3 is inserted in a straight line through the center, so that the optical pulse signal ph shown in FIG. 1 can be transmitted through the shortest distance without unnecessary bending, and the optical pulse signal ph can be output. loss can be reduced. Further, the optical fiber 3 includes a coating member 14, a lead wire 8. lh
, the reinforcing wire 15, the covering member 16, etc., and will not be easily cut.

Note that the number of lead wires 8 and 81 is not limited to two as shown in the illustrated example; for example, if a current is passed through the reinforcing wire 15, the number of lead wires may be one. In addition, the number of reinforcing wires 15, the number of strands 15
Various choices can be made for the number of + and the twisting method, but they can be arbitrarily selected in consideration of the outer diameter, strength, etc. of the flexible strip 2.

(Effects of the Invention) As detailed above, the flexible strip of the anti-theft device of the present invention has a first layer including an optical fiber disposed along the axis in the center thereof, and an outer periphery of the first layer. It is characterized by comprising a second layer in which at least one conductive wire and a plurality of reinforcing wires are wound together.

Therefore, since the conductive wire is substantially located in the outermost layer, the degree of freedom for movement in the twisting direction is increased compared to the conventional method, which increases flexibility. The winding diameter when the strip is wound into a loop shape for storage can be reduced, and the storage state can be made compact.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a block diagram showing the electrical system of an anti-theft device to which the flexible strip of the present invention is used, and FIG. 2 is a front view of the flexible strip. , Fig. 3 is a side view of a motorcycle equipped with an anti-theft device, Fig. 4 is a perspective view of the anti-theft device, Fig. 5 is a sectional view of the flexible strip, and Fig. 6 is a developed plan view. . 2... Flexible strip, 3... Optical fiber, 8,81.
... Lead wire (conductive wire), 14.16 ... Covering member,
15... Reinforcement line. Applicant Honda Motor Co., Ltd. Applicant Honda Lock Co., Ltd. Agent Patent Attorney Satoshi Watanabe Onma Kanji Nagato Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. In an anti-theft device that photoelectrically detects cutting of a flexible strip that incorporates optical fibers and conductive wires and issues an alarm, the flexible strip has a central portion along its axis. a first layer including optical fibers disposed therein;
A flexible strip for an anti-theft device, comprising a second layer in which at least one conductive wire and a plurality of reinforcing wires are both wound around the outer periphery of the layer.