JP3173898B2 - Security alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a security alarm device for monitoring intrusion of a suspicious person or the like, and more particularly, to a security room or the like when an intruder pulls a wire stretched over an intrusion guard area. The present invention relates to a security alarm device capable of outputting an alarm to a security receiver and displaying an alarm at the entry point.

[0002]

2. Description of the Related Art Conventionally, various security devices for security (hereinafter simply referred to as "security devices") for providing intrusion security areas have been proposed or implemented. Such a security device is usually connected to a security receiver in a security room through a wire stretched in an intrusion security area and a signal wire. This security receiver monitors a predetermined range of a guard area as a single loop circuit, and particularly when the guard area is large, a number of security devices are connected in series along the guard area.

[0003] For example, as shown in FIG. 5, a warning device disclosed in Japanese Patent Application Laid-Open No. 53-139499 has male and female connection portions 53 and 54 at the ends of wires 51 and 52 having a predetermined length. The connection can be made in series through this connection. The security receiver (not shown) supplies a monitoring current to the loop circuit connected in this way, for example, a wire 5.
When the surveillance device is disconnected due to the pulling of 1, 52 and the monitoring current is cut off, the intrusion of a suspicious person is detected.

[0004]

As described above, the conventional security device detects intrusion of a suspicious person by disconnecting the security device or the wire. In addition, the security device,
When detecting an intruder's intrusion and outputting an alarm, if the intruder returns to the original state by reconnecting the released warning device or reconnecting the cut wire, the security guard Although he rushed to the site, it was not immediately possible to determine which alert was activated. In particular, in a guard area in which the guard area is large and in which a number of guard devices are provided, it takes time to specify an intrusion route, and prompt and appropriate response to tracking of an intruder is delayed. In order to solve this, the security area is subdivided, or another signal line is provided in the security device, for example, the individual security devices are addressed and multiplexed, or the security receiver is wirelessly provided. You can also make a report, but this will increase equipment costs.

Accordingly, an object of the present invention is to provide an alarm output when the wire is pulled with a predetermined tension or more, and when the alarm is output, even if the alarm device or the wire is returned to the original state. An object of the present invention is to provide a security alarm device that can easily identify an activated alarm device at low cost.

[0006]

In order to achieve the above object, the present invention is provided between wires stretched to monitor an intruder or between a wire and a monitoring signal wire, and the wires are energized. In a security alarm device for relaying the monitored current, the wire is combined with the wire to form a first electric current path of the monitored current in normal times, and when a force equal to or more than a predetermined tension is applied to the wire, the wire is connected to the wire. A tension detecting member that is displaced together with the first electric circuit to open the first electric circuit; and a contact member that conducts with the detecting member when at least the detecting member is displaced to form a second electric circuit. An indicator lamp is connected to the electrical circuit. If the tension detecting member and the contact member have such a function, they can be realized by taking various mechanical means. Here, one form of the tension detecting member is introduced. At least a part of the tension detecting member is formed with elasticity, and the formed elastic portion is
When a force exceeding a predetermined tension is applied to the wire, the wire can pass through the hollow member having a smaller cross-sectional area than the elastic portion while being condensed, but after passing, it is chamfered so that it cannot be displaced in the opposite direction. .

[0007]

According to the above embodiment, the tension detecting member switches the electric path from the first electric path to the second electric path in accordance with the tension applied to the wire. That is, in the range of the predetermined tension, the monitoring current flowing through the wire is relayed to the first electric circuit, and at the same time, the tension applied to the wire is monitored. Further, when the wire is pulled with a predetermined tension or more, the wire is displaced while being connected to the wire and comes into contact with the contact member. Thereby, when the wire is pulled with a predetermined tension or more, the first
The monitoring current in the circuit is interrupted, and the current flows in the second circuit. Since an indicator lamp is provided on the second electric circuit, an alarm can be displayed. Then, since the monitoring current is cut off in the first electric circuit, the security receiver can identify the intrusion state.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a security device according to the present invention. FIG. 1 is a partially cutaway sectional view of an embodiment of the alarm device, FIG. 2 is a perspective view of a column used in the embodiment, and FIG. It is a notched sectional view shown. FIG. 4 is a sectional view showing a modification of the present apparatus.

[0009] The right side of the alerting device shown in FIG. 1 shows a state in which a wire 3 is connected to the housing 1 via a cap 2, and the left side shows the outer shape thereof. In this device, wires are stretched on both sides thereof, and the internal structure is symmetrical in the left-right direction, and each has the same configuration. Case 1
The LED 11 is formed of a non-conductive material such as a synthetic resin into a substantially cylindrical shape, and displays an alarm when an intruder is detected.
A first conductor ring 12 fitted at the center of the inside of the housing;
There is provided a second conductor ring 13 fitted at a position away from the first conductor ring and electrically insulated from the first conductor ring.

On the other hand, the cap 2 fitted with the housing 1 by screwing is hollow inside in the axial direction, and a column 21 is movably arranged in the hollow portion.
A spring 22 is arranged around the periphery. This pillar 2
1 penetrates through the cap 2 and is connected to the distal end 31 of the wire 3 by a nut 23. Between the cap 2 and the housing 1,
Rubber packings 24 and 25 are provided between the cap 2 and the nut 23 for a drip-proof effect.

Next, the support 21 shown in FIG. 1 will be described with reference to FIG. The strut 21 is made of a material that is electrically conductive and highly elastic. First, the tip portion 21 of the support 21
a is in electrical contact with the inner peripheral surface of the first conductor ring 12. Although the tip portion 21a has a diameter larger than the diameter of the first conductor ring 12, the cross section thereof is cut into a cross to form a spring structure, so that the first conductor ring 1
2 is condensed. In addition, the tip portion 21a is chamfered somewhat round to facilitate insertion into the first conductor ring 12. On the other hand, the other end of the column 21 is formed with a screw 21b for connecting the wire 3 with the conductive nut 23, and a hollow portion 21c is provided inside the tip of the screw so as to accommodate the tip 31 of the wire. ing.

Further, the column 21 is provided with a disk-shaped annular portion 21d near the tip portion 21a, and is in contact with the inner peripheral surface in the second conductor ring 13 in normal times. As shown in FIG. 2, a notch 21e extends in a cross shape from the distal end portion 21a of the annular portion 21d, and is formed as a spring integrally with the distal end portion 21a. In a normal state, it is inscribed in the second conductor ring 13 and the first
It is pressed against the conductor ring 12. When the wire is pulled and the column 21 is pulled in the direction of the cap 2 against the spring 22, the annular portion 21d moves away from the first conductor ring 12 and passes through the second conductor ring.

Next, an alert state of the security alert device having such a configuration will be described with reference to FIG. The alerting device is fixedly supported at a predetermined interval, for example, in an alerting area by an unillustrated device fixing unit, and stretches a wire. Each wire and the alerting device are connected in series and form an alerting loop like a “one-stroke”. Both ends of the loop are connected to, for example, a security receiver (not shown) in a security room via ordinary electric wires. This security receiver applies a monitoring current of, for example, several mA to several tens mA on the security loop. As a result, the monitoring current flows, for example, from the right side of the drawing, "wire 3-support 21-first conductor ring 12-left support 21 '-wire 3'", and returns to the security receiver. At this time LED11, since a polarity of the monitoring current and reverse "wire 3 post 21 second conductive ring 1 3
-LED 11-second conductive ring 13 ' -left support 2
No current path of 1'-wire 3 '"is formed. The security receiver detects this current value to identify the intrusion state. For example, it is determined as “normal state” based on the current value of the warning loop, and when the warning loop is interrupted and the current value becomes “0”, it is determined as “abnormal state”.

Next, a state in which the security device detects an abnormality will be described with reference to FIG. Intruder is wire 3
When the wire 3 is pulled with a predetermined tension or more,
The column 21 connected to the wire 3 is moved in the direction of the cap 2 against the spring 22. At this time, the annular portion 21 d of the support 21 passes through the second conductor ring 13. As a result, the tip 21a of the column 21 comes off the first conductor ring 12, and shuts off the monitoring current of the alarm loop. At this time, the security receiver in the security room detects the abnormality of the monitoring current and outputs an alarm immediately, for example.

When the annular portion 21d passes through the inside of the second conductor ring 13, the reduced diameter of the annular portion 21d returns to its original size, so that the spring 22 biases even if the wire tension is restored. Pressed onto the second conductor ring 13. In other words, the diameter of the annular portion 21d is larger than that of the second conductor ring 13 and the axis of the annular portion 21d is shifted with respect to the opening of the conductor ring 13.
2 cannot pass in the opposite direction and will not return to its original position.

As a result, a second electric circuit is formed.
Since the ED 11 is connected in the opposite polarity direction to the monitoring current as described above, no monitoring current flows. However, the security receiver, when detecting such an abnormality, supplies a current in a direction opposite to the monitoring current, so that "wire 3'-post 21'-second conductor ring 13'-LED11-second conductor ring 13-post" 2
A current flows through the route of “1-wire 3”, and the LED 11 is turned on. Thereby, the guard rushes to the corresponding monitoring area and specifies the guard device using the lighted LED 11 as a guide. In the present embodiment, LEDs are employed in terms of durability and current consumption, but of course other indicators may be used.

If the intruder breaks or cuts off the wire and enters, the monitoring current is cut off and the security receiver outputs a conventional alarm. In this case, the alerting device can be identified by searching for the cut wire as in the related art. Furthermore, if the intruder returns the cut or cut wire to its original state and then enters, when the alarm device is released or when the cut wire is returned to its original state, the wire may exceed the predetermined tension. When the wire is pulled, the current is flowing and the LED 11 is turned on at the same time when the wire is returned. Thereby, even if the wire once drawn is connected, the activated alert device can be specified.

As described above, one specific example for realizing the present invention has been described. However, such a warning device can be variously modified and modified without departing from the scope of the claims based on the basic technical idea of the present invention. It is possible. That is, in normal times, the monitoring current is passed through the first electric circuit while monitoring the wire tension,
When the wire is pulled with a force equal to or greater than a predetermined tension, the configuration can be realized by supplying a current to the second electric path via the indicator lamp. As some modified examples, in the present embodiment, the LED 11 is turned on when an abnormality is detected. However, the LED 11 may be turned on and off by intermittently sending a current. Further, in this embodiment, the LED lighting current is made to flow with the opposite polarity as the monitoring current. However, the LED may be lit by the monitoring current without flowing the LED lighting current. In this case, when the support pillar 21 is pulled by the wire and separates from both the first conductor ring 12 and the second conductor ring 13 and the monitoring current is interrupted, the alarm may be output by detecting with a security receiver.

Further, in the above-described embodiment, the tension of the wire is detected on both sides of the alarm device. However, as shown in FIG. As described above, the alarm loop may be configured to detect the tension of the wire. Further, although the distal ends 21a and 21a 'of the columns 21 in FIG. 1 are connected to each other via the first conductor ring 12, for example, one end may be formed so as to be condensed in the other end. .
Further, at the time of alert operation, the annular portion 21d is locked on the second conductor ring 13 by restoring the diameter of the annular portion 21d.
By providing a stop portion tapered toward the center in the conductor ring 13, the annular portion 21d may be locked.

Also, the first and second electric circuit configurations can be variously configured. For example, the first and second electric circuit configurations shown in FIG.
The shape of the conductor ring 12 may be changed and connected between top, bottom, left and right, or a plurality of wires may be monitored individually and connected in series.

Further, instead of the LED, a micro relay may be operated and its contact output may be taken out for display.

[0022]

As described above, according to the present security alarm device, even if the wire is not released, an alarm is output and an alarm is displayed when the wire is pulled with a predetermined tension or more, so that a threat to an intruder is given. Security, such as prevention and prevention of intrusion. Also, even after an intruder has entered, the activated warning device can be identified by its indicator light, so that the time required to identify the intruder is greatly reduced, and the intruder is tracked and countermeasures are planned. Mobility, such as progressing smoothly, is improved. In addition, a high-grade warning device can be realized at low cost without using special wiring, device means, and the like in order to achieve such effects.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of a security device according to the present invention, which is partially cut away.

FIG. 2 is a perspective view of a support in the security device of FIG. 1;

FIG. 3 is a cross-sectional view of the security device of FIG.

FIG. 4 is a cross-sectional view of a modified example of the security device of FIG.

FIG. 5 is a cross-sectional view of a conventional security alarm device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Housing | casing 2 ... Cap 3, 3 '... Wire 11 ... LED12 ... 1st conductor ring 13, 13' ... 2nd conductor ring 21, 21 '... Prop 22 ... Spring 24, 25 ... Drip-proof rubber packing

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G08B 13/00-15/02

Claims (1)

(57) [Claims] 1. A security alarm device provided between wires stretched for monitoring an intruder or between the wires and a monitoring signal wire, and relays a monitoring current flowing through the wires. In normal times, the first of the monitoring currents is
A tension detecting member that is displaced when a force equal to or greater than a predetermined tension is applied to the wire to open the first electric circuit; and is electrically connected to the detecting member when at least the detecting member is displaced. And a contact member for forming a second electric circuit, wherein the second electric circuit includes an indicator light , and the tension detecting member is provided .
Is at least partly formed with elasticity.
The formed elastic portion applies a predetermined tension to the wire.
When a force exceeding the
Can pass while condensing inside a small hollow member, but pass
Later, it is chamfered so that it cannot be displaced in the opposite direction.
A security warning device according to claim Rukoto.