JPS5866469A - Device for attaching television camera to monitoring car - Google Patents

Abstract

PURPOSE:To always keep an ITV camera horizontally to facilitate the monitoring, by holding freely rotatably the ITV camera, containing a ballast, by means of a ball bearing. CONSTITUTION:A monitor car 2 travels along a rail 1 and monitors a subject through an ITV camera 3. The car 2 contains a panhead consisting of a revolution driving part 4, a rotary seat 5, an up-down driving part 6 and a camera fixing plate 9 attached via a driving pin 8. The plate 6 is connected to a camera housing 14. Therefore the plate 9 is moved with revolutions of the seat 5 and the pin 8. The camera 3 is stored in the housing 14 and can be turned freely by means of ball bearings 10 and 10'. A ballast 11 is attached to the camera 3 in order to keep the camera 3 horizontally although the car 2 is inclined.

Description

Detailed Description of the Invention (a) Technical Field The present invention relates to the mounting of a television camera on a monitoring vehicle that runs on a mole rail installed in a nuclear reactor containment vessel to monitor abnormal conditions within the containment vessel. Regarding equipment.

(b) Description of conventional example It is necessary to monitor abnormal conditions of pumps, piping, safety valves, etc. in the reactor containment vessel to prevent accidents.

In other words, to monitor the occurrence of various abnormalities, industrial television cameras (
A method has been proposed in which a monitoring vehicle equipped with an ITV camera (hereinafter referred to as an ITV camera) is used to monitor whether or not there is an abnormality.

(C) Disadvantages of the conventional example However, when the surveillance monitor vehicle moves from a horizontal position along the rail laid in the containment vessel to a position where the rail is laid at an angle, the ITV camera tilts and the object to be monitored is Depending on the position f, the image displayed on the monitor TV will be tilted and it will be difficult to see the image on the monitor TV in that state, so operations such as changing the angle of the ITV camera will be required. However, the disadvantage is that the equipment for this purpose is large and complex.

(d) Purpose of the present invention The present invention has been made to eliminate the above-mentioned drawbacks.
By adopting a system that uses ballast to rotate the TV camera and uses power to naturally rotate the ITY camera and restore it to its normal position, the structure is simple and the method for adjusting the angle of the ITV camera is simple. Camera mounting is intended to provide a device.

(e) Structure of the present invention In other words, the present invention comprises an ITV camera attached to a surveillance vehicle via a pan head and equipped with a rotating ballast on ball bearings, so that the surveillance vehicle can move from a horizontal area to an inclined area. As the vehicle runs, the I'1' V camera naturally rotates according to its angle, and the rotating device and ITV camera are rotated so as to restore the vehicle to its normal position. An embodiment of the device according to the present invention will now be described.

Fig. 1 shows the device according to the present invention running on a rail, Fig. 2 is a partially cutaway side view of the side of the surveillance monitor vehicle, and Fig. 3 is a front view of Fig. 2. FIG. 4 is an enlarged cross-sectional view of a part of the rotating device when traveling on the horizontal section in FIG. 3, and FIG. This is a partially enlarged cross-section.

As shown in Fig. 1, a monitoring monitor truck 2 runs along a rail 1 bent at an angle of approximately 90 degrees and laid in an L-shape. Monitor the object to be inspected located in front of the page. The monitoring vehicle 2 travels by driving a chain (not shown) laid within the rail. In FIG. 2, the surveillance monitor vehicle 2 carries a pan head consisting of a rotation drive section 4, a rotation seat 5, a vertical drive section 6, and a camera fixing plate 9 attached via a drive bin 8. The camera fixing plate 9 connects the camera storage box 14. In such a device, the rotary seat 5 is rotated by a motor (not shown) built in the rotary drive section 4, and the entire vertical drive section 6 is rotated. An ITV camera '3 is attached to the lower part of the vertical drive unit 6 via a rotating device 7. The vertical drive unit 6 has a built-in motor (not shown), and when the drive pin 8 is rotated by the motor, the camera fixing plate 9 moves in the vertical direction.

Therefore, the rotation and vertical movement of the ITV camera 3 are performed by operating the motors built into the rotation drive unit 4 and the vertical drive unit 6, respectively. Note that the rotating device 7 is a ball bearing 10.1.
0', ballast] 1, stopper 12, electromagnetic clutch 13
, and a camera storage box 14. The ITV camera 3 is stored in the camera storage box 14, and I'1'
The V camera 3 is rotatably supported by ball bearings 10° and 10'. As shown in FIGS. 3 and 4, a semicircular ballast 11 is attached to the center of the ITV camera 3 to keep the KITV camera 3 horizontal even if the surveillance vehicle 2 is tilted. ing. camera storage box 1
A stopper 12 is provided at the top of 4, and the stopper 12t'C is in contact with the ballast 11, and the ballast 11 is 90
It is designed not to rotate more than °.

An electromagnetic clutch 13 is attached to the inside of the camera storage box 4 facing the rear end of the ITV camera 3. When the monitoring vehicle 2 travels only in the horizontal or vertical direction, the electromagnetic clutch 13, which is non-coupled when energized, is not energized, and the coupling surfaces of the electromagnetic clutch 13 are in a coupled state.

(g) Explanation of operation Therefore, the ITV camera 3 is in a fixed state, and unnecessary Vcl'
Prevent rV camera 3 from rotating.

In addition, when the surveillance vehicle 2 moves from the horizontal direction to a rail position inclined from the horizontal direction, the electromagnetic clutch 13 is energized so that the coupling surface of the electromagnetic clutch 13 becomes uncoupled, and the ITV camera 3 is constantly monitored by the ballast IIK. Can be kept horizontal. FIG. 4 is a partial sectional view showing the position of the ballast 11- when the ITV camera 3 is traveling in a horizontal area.

The position of the ballast 11 during horizontal travel is fixed at a position opposite to the camera fixing plate 9. Figure 5 shows Ii'V camera 3
FIG. 2 is a partial cross-sectional view showing the position of the ballast 1 when the vehicle is traveling in a vertical section. Ballast when traveling on a vertical section] Position 1 is the 4th position.
The ballast 11 is moved by 90° from the position of the ballast 11 shown in the figure and fixed there.

(!]) Description of Effects As explained above, according to the present invention, the monitoring vehicle 2 moves from the horizontal rail 1a to the inclined rail 1 as shown in FIG.
Even if the ITV camera 3 is moved and the surveillance monitor vehicle 2 is tilted, the ITV camera 3 can always be kept flat, and the image displayed on the monitor TV will be displayed vertically, so there is no need for monitoring. Therefore, it has a simpler structure than a type of mechanism that uses power other than gravity, such as a motor, to keep the ITV camera horizontal. Although the present invention has been described as an example in which the present invention is used for a monitoring vehicle that runs inside a nuclear reactor containment vessel, it is not limited to this, and can be applied to, for example, patrol monitoring locations such as oil refineries, chemical plants, and construction sites. .

[Brief explanation of the drawing]

FIG. 1 is a side view showing a monitoring vehicle equipped with a device according to the present invention running on a rail, FIG. 2 is a side view partially showing an embodiment according to the present invention in cross section, and FIG. The figure is a front view of Fig. 2, Fig. 4 is an enlarged sectional view of the ITV camera section in a horizontally moving state, and Fig. 5 is an enlarged sectional view of the ITV camera section in a vertically moving state in Fig. 3. It is. 1...Rail, 2...I [Mo-ri vehicle, 3
...IT ■Camera, 4...Rotation drive unit, 5...
・Rotating seat, 6... Vertical drive unit, 7... Rotating device, 8... Drive pin, 9... Camera fixing plate, I
Q, IQ'...Ball bearing, ]1...Ballast, ]
2... Stopper, ] 3... Electromagnetic clutch, ]
4...Camera storage box. Application agent Patent attorney Hitoshi Gobe Kikuchi Page 3 Q1

Claims (2)

[Claims] (1) A pan head mounted on a surveillance monitor vehicle, a camera fixing plate attached to the pan head via a drive pin so that it can rotate in the radial direction, and a camera storage box fixed to the camera fixing plate. , a television camera held and housed in this camera storage box by a ball bearing, and a television camera provided downward from the side surface of the television camera approximately at the center and within an angle range of 90'' in the radial direction along the center line. A television camera installation for a surveillance monitor vehicle is characterized in that the television camera is equipped with a semicircular ballast that swings at a speed of 100 degrees, and an electromagnetic clutch interposed between an end of the television camera and a wall of the camera storage box. Device. (2) The mounting of a television camera on a surveillance monitor vehicle according to claim 1, wherein the pan head has a rotation drive unit placed on a rotation seat, and the rotation seat is composed of a vertical drive mechanism unit. is a device.