JP3013060U - Alarm device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an alarm device that can prevent forgetting to reset the alarm device. [Arrangement] An abnormality detecting unit for detecting an abnormality, a control circuit 5 capable of driving the alarm unit 4 when the abnormality is detected by the abnormality detecting unit, and an alarm unit 4 for controlling the operation of the control circuit 5.
Key switch 6 for switching between a warning mode in which the alarm is driven and a non-warning mode in which the alarm unit 4 is not driven even if an abnormality is detected.
And a timer circuit 7 that is activated when the key switch 6 is switched from the warning mode to the non-warning mode and generates an output after a predetermined time. The control circuit 5 is provided when the output from the timer circuit is generated. When the operation of the control circuit 5 is in the non-alert mode, the alarm unit 4 is driven.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an alarm device installed in an important facility such as an explosives warehouse, and more particularly to an alarm device for preventing forgetting to set after the alarm is cleared.

[0002]

[Prior art]

 For example, an important device such as an explosives store is equipped with a warning device that detects an illegal intruder and issues an alarm. This alarm device is provided with a changeover switch for switching between a warning mode in which an alarm is issued when an intruder is detected and a non-warning mode in which an alarm operation is not performed. To prevent the alarm from being issued when a legitimate user enters the room, operate the changeover switch to enter the non-warning mode. Then, when the user exits after the work in the explosives warehouse is completed, the changeover switch is operated again to enter the warning mode.

As described above, it is necessary to reset the alarm device to the warning mode after the work is completed, but it is often forgotten to reset the alarm device to the warning mode because of the sense of security that the work is finished. .

[0004]

[Problems to be solved by the device]

 Therefore, an object of the present invention is to provide an alarm device that can prevent forgetting to reset the alarm device.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides an abnormality detecting means for detecting an abnormality, a control circuit capable of driving a sounding unit when the abnormality is detected by the abnormality detecting means, and the control circuit. Switch to switch the operation of the alarm mode to the warning mode that drives the alarm unit and the non-warning mode that does not drive the alarm unit even if an abnormality is detected, and the switch that is activated when the switch is switched from the alarm mode to the non-warning mode. The control circuit drives the alarm unit when the control circuit is in the non-warning mode when the output from the timer circuit is generated. It is characterized by being

[0006]

[Action]

 When the operation mode of the alarm device is switched from the caution mode to the non-warning mode, the timer circuit is activated, and the operation mode of the alarm device is determined after the elapse of a certain time determined by this timer circuit, and the alarm mode is set. The alarm unit is activated by the alarm unit. As a result, it is possible to prevent the alarm device from remaining in the non-warning mode.

[0007]

【Example】

 Hereinafter, features of the present invention will be specifically described based on embodiments with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the alarm device of the present invention. The alarm device 1 detects the state of the input from the alarm line 2 and outputs an alarm signal to the alarm signal line 3 when the detection result is abnormal, and a control circuit 5 for driving the alarm unit 4 such as a buzzer. , The key switch 6 that switches the operation of the alarm device 1 between the warning mode and the non-alert mode, and it is activated when the operation of the alarm device 1 is switched from the alarm mode to the non-alert mode by the key switch 6, and is output after a certain time has elapsed. A timer circuit 7 for generating a noise, a storage battery 8 for supplying an operating voltage to the alarm device 1, a control circuit 5, a warning line 2, a warning signal line 3, and a storage battery 8 for connection. And a terminal portion 9. The control circuit 5 sets the operation of the alarm device 1 to the alarm mode when the key switch 6 is switched to the alarm side, and drives the alarm unit 4 when an output is generated from the timer circuit 7. Output an alarm signal. It should be noted that the fixed time of the timer circuit 7 is set to a time sufficient to complete the work in the facility in which the alarm device 1 is installed.

The alarm device 1 is provided as an accessory to important equipment such as a powder magazine. The warning line 2 of the alarm device 1 includes, for example, well-known intrusion detection devices such as an infrared detection type intrusion detection device, a Doppler type intrusion detection device using ultrasonic waves or electromagnetic waves, and a wire cutting type intrusion detection device (all are shown in FIG. (Not shown) is connected. These intrusion detection devices are arranged inside and outside the facility at appropriate places, for example, near doors and windows.

For example, when there are a plurality of powder magazines, the alarm device 1 is installed in each powder magazine. The alarm signal from each alarming device 1 is supplied to the alarm receiving device 10 installed in a guard station or the like remote from the explosives warehouse via the alarm signal line 3. The alarm receiving device 10 is provided with a display device (not shown) that indicates in which explosive chamber the alarm was issued.

Next, the operation of the above alarm device will be described.

In the normal state, the key switch 6 is switched to the alarm side, and the alarm device 1 is in the alarm mode. When an intruder is detected in this state, the control circuit 5 drives the alarm unit 4 and the buzzer starts alarming, and the surrounding area is informed that there is an intruder in the powder magazine. At the same time, an alarm signal is output from the control circuit 5 and is supplied to the alarm receiving device 10 via the alarm signal line 3 to indicate which explosive container the intruder was in.

Next, the operation when an authorized worker enters the explosive store will be described.

First, when the worker inserts a key for switching the operation mode of the alarm device into the key hole of the key switch 6 and switches to the non-warning side, the control circuit 5 enters the non-warning mode. In this state, unlock the door of the explosive store to enter inside the explosive store. At this time, an output is generated on the warning line 2, but since the control circuit 5 is in the non-warning mode, the alarm unit 4 is not driven and the alarm signal is not output. Further, when the key switch 6 is switched to the non-warning side, the timer circuit 7 starts operating.

After exiting the work, when exiting the explosive store, the door of the explosive store is closed and locked, and the key switch 6 is switched to the caution side. As a result, the alarm device operates in the alert mode, and it is possible to detect illegal intruders after that.

Here, in this embodiment, when the key switch 6 is forgotten to switch to the caution side when exiting from the explosive store, the time when the operation mode of the alarm device is switched from the caution mode to the non-warning mode. After a lapse of a certain time from, the output is generated from the timer circuit 7, and the state of the key switch 6 is judged at this time. When the key switch 6 is on the non-warning side, the alarm circuit 4 is driven by the control circuit 5 so that the buzzer starts to sound, and the alarm signal is output from the control circuit 5, and the alarm signal line 3 It is supplied to the alarm receiving device 10 via.

Therefore, the operator can notice that he / she forgets to set the alarm device, and it is possible to avoid leaving the alarm device for a long time without being set.

[0018]

[Effect of device]

 As described above, in the present invention, if the warning mode is not in the warning mode after a certain time has passed from the time when the warning mode is switched from the caution mode to the non-warning mode, an alarm is issued. Therefore, it is possible to prevent forgetting to set the alarm device.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the alarm device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Alarm device, 2 ... Warning line, 3 ... Alarm signal line, 4 ... Alarm part, 5 ... Control circuit, 6 ... Key switch, 7 ... Timer circuit, 8 ... Storage battery, 9 ... Terminal part, 10 ... Alarm receiving device

Claims (1)

[Scope of utility model registration request] 1. An abnormality detecting unit for detecting an abnormality, a control circuit capable of driving a sounding unit when the abnormality detecting unit detects an abnormality, and an operation of the control circuit for driving the sounding unit. And a switch for switching to a non-warning mode in which the alarm unit is not driven even when an abnormality is detected, and a timer circuit which is activated when the switch is switched from the warning mode to the non-warning mode and generates an output after a certain time. The alarm device, wherein the control circuit drives the alarm unit when the operation of the control circuit is in the non-alert mode at the time when the output from the timer circuit is generated. .