JPH11148637A - Monitoring camera retreating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means to retreat a monitoring camera safely with no mistake upon the abnormality of a combustion furnace. SOLUTION: A monitoring camera 1 for a combustion furnace is retained by a slide table 2, sliding on a rail 3, while the table is slid on the rail 3 by the abnormality signal of the combustion furnace to the position of the slide table 2' after retreating whereby the monitoring camera is retreated to the position of the monitoring camera 1' after retreating. The slide table 2 is retained to a recessed part 3a by a retaining piece 5. When the driving voltage of a solenoid 4 is cut by receiving an abnormality signal, a releasing spring 5c is contracted to release the retaining piece 5 from the recessed part 3a. According to this operation, the slide table 2 is pushed by the resilient force of a resilient spring 6 to start movement into a retreating direction. The slide table 2 is pulled by a constant loading spring 7, pulling the table 2 by a constant load into the retreating direction and, as a result, the slide table 2 is moved smoothly to the retreating position of the same.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance camera retreat device for automatically retreating a surveillance camera for monitoring the inside of a combustion furnace without error when the combustion furnace is abnormal.

[0002]

2. Description of the Related Art In order to monitor the combustion state and the like inside a combustion furnace, a surveillance camera in which the periphery of a lens is forcibly cooled is used. At the time of abnormality of electricity, blast, water supply, temperature, gas and the like of the combustion furnace, safety measures of the furnace itself are taken by abnormal signals detected by respective sensors. At the same time, it is necessary to safely and automatically evacuate surveillance cameras that monitor the inside of the furnace. An electric motor is generally considered as the power to be automatically retracted. However, when relying on electric power for the evacuation power, there is a possibility that the evacuation may not be performed safely when an abnormality occurs in the electric system. Also, since surveillance cameras are precision instruments,
Smooth evacuation with less impact is required.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a means for safely and without error in retracting a surveillance camera when a combustion furnace is abnormal.

[0004]

A surveillance camera evacuation device which receives an abnormal signal notifying an abnormality of a combustion furnace and retracts a surveillance camera for monitoring the inside of the combustion furnace from the combustion furnace.
A slide base that slides on the rail while holding the surveillance camera, an elastic spring that springs the slide base, a constant weight spring that pulls the slide base with constant load, and an elastic force and constant weight of the coil spring A locking portion for locking the slide table against the traction force of a spring and releasing the slide table in accordance with the abnormal signal is provided, and the monitoring camera is automatically slid from the combustion furnace by sliding the slide table in accordance with the abnormal signal. Evacuate.

[0005] Instead of the constant weight spring, a wire is pulled by a weight via a pulley provided at the end of the rail.

The locking portion includes a locking piece that locks to a convex portion provided at a fixed position with respect to the rail, a solenoid that urges the locking piece against the convex portion and locks the same, It is composed of a coil spring that releases the locking of the locking piece released from the solenoid by the abnormality signal to the projection.

The solenoid releases the locking piece by cutting off the voltage for driving the solenoid.

A stop spring is provided at a stop position of the slide table after the surveillance camera is retracted, the stop spring being stopped by being slid by the constant weight spring or the like.

[0009] The slide table is provided with wheels that roll on the rails.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a (A) side view and (B) a plan view (a view taken in the direction of arrows cc in FIG. 1) of an embodiment of the surveillance camera retracting device according to the present invention. The surveillance camera 1 is installed outside the furnace wall 10 of the combustion furnace, and a monitoring unit 1a including a relay lens or the like whose surroundings are forcibly cooled is inserted into a monitoring hole 10a opened in the furnace wall 10 to perform combustion in the combustion furnace. Monitor the situation. The surveillance camera 1 is held on a slide table 2 which slides on a rail 3 suspended substantially horizontally on a mounting table 20 or the like fixed to the outside of the furnace wall 10, and is held by a holding bracket 2a or the like. In the combustion furnace,
Each sensor detects electricity, blast, water supply, temperature, gas and other abnormalities, and issues an abnormal signal when abnormal.
In response to the abnormal signal of the combustion furnace, the slide base 2 is slid on the rail 3 to the position of the slide base 2 'after retreat, so that the surveillance camera 1 is automatically retreated to the surveillance camera 1' after retreat. Let it.

The slide table 2 is connected to the slide table 2 by a support shaft 5a.
The rail 3 is rotatably attached to a protrusion 3a fixed to the side surface of the rail 3 or the like. The locking piece 5 is pulled and locked by the solenoid 4 via the connecting rod 5b. When an abnormality occurs in the combustion furnace, the abnormality signal is received and the solenoid 4
Cut off the drive voltage. As a result, the release spring 5c formed of a coil spring or the like contracts, and moves the connecting rod 5b to remove the locking piece 5 from the projection 3a. As a result, the slide table 2
It is pushed by the resilient force of the resilient spring 6 and starts moving in the retreat direction. The slide table 2 is further pulled by the constant load spring 7 that pulls one end at a constant load in the retreat direction, such as a leaf spring that winds up at the end of the retreat position of the rail, and as a result, moves smoothly to the retreat position. . The surveillance camera 1 is evacuated by cutting the drive voltage of the solenoid 4, so that the evacuation can be performed safely even when the power is cut off due to an abnormality in the combustion furnace or the like.

A stop spring 8 made of a coil spring or the like is provided at an end of the rail 3 for retreating the monitoring camera 1, and the slide table 2 is moved to a stop position of the slide table 2 'after retreat by a constant weight spring 7 or the like. Stopped with little impact due to sliding. Further, by providing the slide base 2 with wheels 2b that roll on the rails 3, the slide base 2 can smoothly slide on the race and the weight of the constant weight spring 7 can be reduced.

FIG. 2A is a side view and FIG. 2B is a plan view of another embodiment of the surveillance camera retracting device according to the present invention.
FIG. In exactly the same manner as described above, when the combustion furnace is abnormal, the surveillance camera 1 is evacuated as the evacuated surveillance camera 1 '. The constant weight spring 7 described above is mounted on the slide base 2,
It is replaced with a wire 31 pulled by a weight 33 via a pulley 32 provided at the end of the rail 3. When the above-mentioned locking portion is released, the slide base 2 moves in the retreating direction by the wire 31 pulled by the weight 33 at a constant load, becomes the position of the slide base 2 ′ after the retreat, and holds the monitoring camera 1. To the position of the surveillance camera 1 'at the time of evacuation.

[0014]

According to the present invention, a surveillance camera evacuation device which receives an abnormal signal indicating an abnormality of the combustion furnace and retracts the surveillance camera monitoring the inside of the combustion furnace from the combustion furnace holds the surveillance camera and slides on the rail. Slide table, a resilient spring for resiliently moving the slide table, a constant load spring for pulling the slide table with constant load, and a slide table for resilient force of the coil spring and pulling force of the constant load spring. By providing a locking portion to be locked and released by the abnormal signal, by sliding the slide base by the abnormal signal to automatically retract the monitoring camera from the combustion furnace,
When the combustion furnace is abnormal, the surveillance camera can be evacuated safely and without error.

[Brief description of the drawings]

FIG. 1A is a side view of an embodiment of a surveillance camera retracting device according to the present invention, and FIG.

2A is a side view and FIG. 2B is a plan view of another embodiment of the surveillance camera retracting device according to the present invention (a view taken in the direction of arrows cc in FIG. 2).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Surveillance camera 2 Slide stand 3 Rail 4 Solenoid 5 Locking piece 5b Connecting rod 5c Release spring 6 Resilient spring 7 Constant load spring 8 Stopping spring 10 Furnace wall 20 Mounting base 31 Wire 32 Pulley 33 Weight

Claims (6)

[Claims] 1. A surveillance camera retreating device for receiving a fault signal notifying an abnormality of a combustion furnace and retracting a monitoring camera monitoring the inside of the combustion furnace from the combustion furnace, holding the monitoring camera and sliding on a rail. Slide table, a resilient spring for resiliently moving the slide table, a constant load spring for pulling the slide table with constant load, and a slide table for resilient force of the coil spring and pulling force of the constant load spring. A surveillance camera evacuation device, wherein a surveillance camera is automatically evacuated from the combustion furnace by slidably moving the slide base in response to the abnormality signal. . 2. The surveillance camera retracting device according to claim 1, wherein a wire pulled by a weight via a pulley provided at an end of the rail is used instead of the constant weight spring. 3. The locking portion includes a locking piece that locks on a convex portion provided at a fixed position with respect to the rail, and a solenoid that urges the locking piece against the convex portion to lock the same. 3. The surveillance camera retracting device according to claim 1, further comprising a release spring for releasing the locking of the locking piece released from the solenoid by the abnormality signal to the projection. 4. The surveillance camera retracting device according to claim 1, wherein the solenoid releases the locking piece by cutting off a voltage for driving the solenoid. 5. The stop spring according to claim 1, wherein a stop spring is provided at a stop position of the slide table after the surveillance camera is retracted, the stop spring being stopped by being slid by the constant weight spring or the like. Surveillance camera evacuation device. 6. The surveillance camera retracting device according to claim 1, wherein the slide base is provided with wheels that roll on the rail.