JPH08178182A - Pan head for television camera - Google Patents

Abstract

PURPOSE: To reduce a stress exerted on a line for washing water when a pan tilt rest with a washer nozzle performs pan tilt operation. CONSTITUTION: When the pan operation part 24 of a pan tilt rest 22 performs pan operation centering around a pan axis, twist occurs to a flexible tube 2 arranged at the pan operation part 24 along with pan operation but since the flexible tube 21 is in a free state and runs through the pan axis of the pan operation part 24 and is brought into a slacked state in the fixing part 23, whereby the generation of a stress along with pan operation is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pan / tilt head for a television camera which carries out a pan / tilt operation by mounting a camera housing having a television camera.

[0002]

2. Description of the Related Art A camera platform on which a television camera is mounted and a pan / tilt operation is performed is generally called a pan / tilt platform, and is used outdoors for monitoring traffic conditions, for example. The TV camera installed inside the housing shoots through the transparent window of the camera housing, but since such a pan-tilt stand is often installed outdoors, it easily gets dirty and the transparent window is regularly cleaned. There is a need.

Therefore, in such a pan / tilt table, normally, cleaning water is automatically supplied to the transparent window for cleaning. FIG. 1 is a perspective view of a first conventional example of a pan-tilt table having such a cleaning function. In this pan / tilt table 1, the valve 2 is kept open and the solenoid valve 3 is opened.
Is remotely controlled to open and close to control the supply of cleaning water from the nozzle 5 fixed to the base 4, supplying the cleaning water to the transparent window of the housing 6 and a wiper mounted near the transparent window (Fig. The transparent window is wiped off by (not shown).

FIG. 2 is a front view of a second conventional example of a pan-tilt table having a cleaning function. In this pan-tilt table 11, a pump (not shown) is driven by remote control to supply cleaning water from the tank 12 to the transparent window 13 and wipe the dirt of the transparent window with the wiper 14.

There is also proposed a pan-tilt stand in which one end of a hose is connected to the solenoid valve 3 shown in FIG. 1 and the hose is extended to a position where washing water can be supplied to a transparent window through the outside of the pan-tilt stand. .

[0006]

However, in the pan / tilt table of FIG. 1, since the nozzle 5 is fixed at a position where it does not interfere with the imaging, the nozzle 5 is installed when cleaning the transparent window. It is necessary to move the transparent window of the housing 6 to the position, and such a moving operation is very troublesome and time-consuming.

The pan / tilt table of FIG. 2 can be washed at any position, but since the cleaning water is supplied from the tank 12, it is necessary to supply the cleaning water to the tank 12.
Maintenance is extremely troublesome. Further, when the hose is provided outside the pan / tilt base, a large stress is likely to be applied to the hose when performing the pan / tilt operation, which causes a problem in the durability of the hose. In particular, in the pan operation, since it is necessary to rotate the hose over an angle of 300 ° or more, there is a possibility that the hose may be largely twisted.

It is an object of the present invention to provide a pan head for a television camera having a cleaning function with a simple structure that does not have such inconvenience.

[0009]

In a television camera platform according to the present invention, a camera housing on which the television camera is installed is mounted to perform at least a pan operation, and cleaning water is automatically supplied to a transparent window of the camera housing. In a pan head for a television camera capable of being supplied to and washed with a cleaning liquid, a washing liquid pipe for supplying washing water for washing the transparent window is passed through a hollow vertical shaft for performing a pan operation. It is a thing.

In a preferred embodiment of the television camera platform according to the present invention, the television camera platform is configured to perform a tilting operation, and the washing water conduit is passed through a hollow horizontal shaft for performing a tilting operation. It is characterized by having done.

In a further preferred embodiment of the pan / tilt head for a television camera according to the present invention, a rotatable joint arranged on the tilt axis is provided in the washing water pipe passing through the hollow horizontal shaft. To do.

[0012]

In the television camera platform according to the present invention, cleaning can be performed at any position, so that the operation for cleaning is simple and the time required for cleaning is short. Furthermore, since the washing water pipe is passed through the hollow vertical shaft that performs the pan operation, the stress applied to the washing water pipe during the pan operation can be reduced, and the durability can be significantly improved. You can

Further, in the embodiment in which the washing water pipe is passed through the hollow horizontal shaft for tilting, the stress applied to the washing water pipe during the tilting operation can be reduced.

Further, in the embodiment in which the rotatable joint is provided on the tilt axis, the washing water pipe line is not twisted during the tilting operation.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a pan head for a television camera according to the present invention will be described in detail with reference to the drawings. FIG. 3A is a side view of a first embodiment of a pan head for a television camera according to the present invention,
(B) is the AA sectional view. In this example, the flexible tube 2 has one end connected to a cleaning water supply source (not shown).
1 (in this example, a thin polyurethane tube having an inner diameter of 10 mm is used) is fixed to the fixing portion 23 of the pan-tilt base 22.
From the pan operation unit 24 that performs pan operation around the pan axis
And a tilting operation unit 25 that performs a tilting operation around the tilt axis, in order, and the other end of the tilting operation unit 25 is extended outside from the operation unit 26 of the pan-tilt table 22. The pan / tilt table 22 has a pan range of ± 160 ° and a tilt range of ± 40 °, for example.

The flexible tube 21 is fixed in the fixing portion 23 and the operating portion 26 by fixing members 27 and 28, respectively. The fixtures 27 and 28 have a waterproof structure to prevent water from entering from the outside. The diameter of the hollow shaft of the pan operation unit 24 is made sufficiently larger than the outer diameter of the flexible tube 21 so that the flexible tube 21 is free in the hollow shaft of the pan operation unit 24. The flexible tube 21 is slidably supported by the support member 29 at the end of the tilting operation unit 25 on the side of the cleaning water supply source. In addition, the flexible tube 21
Is slackened inside the fixing portion 23.

The operation of this example will be described. Pan / tilt stand 22
When the panning operation unit 24 of FIG. 2 performs a panning operation around the pan axis, the flexible tube 21 in the panning operation unit 24 is twisted with the panning operation, but in this example, the flexible tube 21 is free. In this state, the bread motion portion 24 passes through the pan axis and is further loosened inside the fixing portion 23. Therefore, the stress generated by the pan movement can be reduced.

When the tilt operation section 25 performs a tilt operation about the tilt axis, the flexible tube 21 in the tilt operation section 25 is twisted due to the tilt operation. Tilt operation unit 25 for tube 21
Since the end portion of the cleaning water supply source side is slidably supported by the support member 29, the stress caused by the tilting operation can be reduced.

In this example, the flexible tube 21 through which the cleaning water flows is passed through the pan axis and the tilt axis for performing the pan-tilt operation, and the twist applied to the flexible tube 21 when the pan-tilt base 22 performs the pan-tilt operation is performed. By making the size small, the stress in the cleaning pipe line can be made small with a simple structure, so that the durability of the flexible tube 21 is improved.

FIG. 4 (a) is a front view of a first embodiment of a television camera platform according to the present invention on which a camera housing is mounted, and FIG. 4 (b) is a side view thereof. Also in this example, the same members as those of FIG. 3 are denoted by the same reference numerals. The flexible tube 21 protruding from the tilt operation unit 25 (FIG. 3) is extended to near the transparent window 31 of the camera housing 30, and the nozzle 32 is provided at the tip thereof. The nozzle 32 moves along with the pan-tilt operation of the camera housing 30, and the transparent window 3
The relative position of the nozzle 32 with respect to 1 does not change.

A wiper 33 is provided near the transparent window 31, and after the cleaning water is supplied from the nozzle 32 to the transparent window 31, the wiper 33 wipes the transparent window 31 to clean the transparent window. To do.

Therefore, since the transparent window 31 can be cleaned at any camera housing position, the cleaning operation is simplified and the time required for cleaning is shortened. In addition, the flexible tube 2 connected to the washing water supply source
Since the cleaning water is supplied via 1 there is no need to supply the cleaning water to the tank or the like.

FIG. 5A is a side view of a second embodiment of the pan / tilt head for a television camera according to the present invention, FIG. 5B is its sectional view, and FIG. 5C is its rotary joint portion. Also in this example, the same members as those of FIG. 3 are denoted by the same reference numerals. The flexible tube 21 is fixed by the fixing members 27 and 28 at the fixing portion 23 and the operation portion 35 of the pan / tilt table 34, respectively. Further, the diameter of the hollow shaft of the pan operation portion 24 is made sufficiently larger than the outer diameter of the flexible tube 21 so that the flexible tube 21 is free in the hollow shaft of the pan operation portion 24.

In this example, the flexible tube 21 at the end of the tilting operation unit 36 on the side of the washing water supply source is fixed to the rotary joint 37 fixed to the tilting operation unit, and the tilting operation unit 36 is fixed.
Allow the flexible tube 21 therein to move relative to the revolute joint 37. In addition, this rotary joint 37,
It is fixed to a fixing member 38 fixed to the pan operation unit 24.

The flexible tube 21 connected to the washing water source is connected to the rotary joint 3 via the rotary joint 37.
The flexible tube 21 connected to the washing water supply source is connected to the flexible tube 21 in the sliding member 7 so that the flexible tube 21 slides with respect to the rotary joint 37. Further, in this example, the flexible tube 21 is slackened not only inside the fixed portion 23 but also between the pan operation portion 24 and the tilt operation portion 36.

The operation of this example will be described. Tilt operation unit 36
When the tilting operation is performed around the tilt axis, the flexible tube 21 in the tilting operation unit 36 moves the tilting operation unit 3
6, the flexible tube 21 is not twisted, so that the stress associated with the tilt operation can be eliminated.

In this example, the flexible tube 21 in the tilt operation section 36 is moved relative to the tilt operation section 36, and the flexible tube between the pan operation section 24 and the tilt operation section 36 is arranged. Since it is loosened, it is possible to further reduce the stress caused by the tilt operation.

FIG. 6 (a) is a sectional view of a third embodiment of a television camera platform according to the present invention, and FIG. 6 (b) is a side view thereof. Also in this example, the same members as those of FIG. 3 are denoted by the same reference numerals. The flexible tube 21 is fixed by the fixing members 27 and 28 at the fixing portion 23 and the operation portion 40 of the pan base 39, respectively. In addition, the diameter of the hollow shaft of the pan operation portion 24 is made sufficiently larger than the outer diameter of the flexible tube 21,
The flexible tube 21 is set free in the hollow shaft of the pan working unit 24.

In this example, since the tilt operation is not performed, only the pan operation section 24 is provided. In this way, the flexible tube 21
, Even if it is only passed through the hollow axis that performs the pan operation,
The stress of the flexible tube 21 can be reduced accordingly.

The present invention is not limited to the above embodiment, but various modifications and changes can be made. For example, if it is not necessary to make the platform have a waterproof structure, instead of providing a slidable support member and a rotary joint in the tilt operation portion in the first and second embodiments, the diameter of this portion is made flexible. By making the diameter sufficiently larger than the outer diameter of the tube so as to be free in the hollow shaft of the tilt operation portion, it is possible to reduce the twist applied when performing the tilt operation.

[0031]

As described above, according to the pan / tilt head for a television camera of the present invention, when the washing water pipe is passed through the hollow vertical shaft for pan operation, the pan / tilt base with washer nozzle performs pan operation. By reducing the twist applied to the cleaning water conduit, the stress of the cleaning conduit can be reduced with a simple structure, so the durability of the cleaning conduit is improved. Also, the transparent window of the camera housing can be cleaned at any camera housing position, and
There is no need to supply cleaning water to the tank etc.

Further, in the embodiment in which the washing water conduit is passed through the hollow horizontal shaft for performing the tilting operation, the twist applied to the washing water conduit when the pan / tilt base with a wash nozzle performs the tilting operation is reduced. Since the stress of the cleaning pipeline can be reduced with a simple structure, the durability of the cleaning pipeline is improved. Further, the transparent window of the camera housing can be cleaned at any camera housing position, and it is not necessary to supply cleaning water to the tank or the like.

Further, in the embodiment in which the rotatable joint is provided on the tilt axis, the washing water pipe line is not twisted when the pan / tilt base with washer nozzle performs the pan operation, so the durability of the washing pipe line is further improved. improves.

[Brief description of drawings]

FIG. 1 is a perspective view of a first conventional example of a pan-tilt table having a cleaning function.

FIG. 2 is a front view of a second conventional example of a pan-tilt table having a cleaning function.

FIG. 3 (a) is a side view of a first embodiment of a pan head for a television camera according to the present invention, and FIG. 3 (b) is a sectional view taken along line AA.

FIG. 4 (a) is a front view of a first embodiment of a pan / tilt head for a television camera according to the present invention on which a camera housing is mounted,
(B) is the side view.

FIG. 5 (a) is a side view of a second embodiment of a pan / tilt head for a television camera according to the present invention, and FIG. 5 (b) is a sectional view thereof.
(C) is the rotary joint part.

FIG. 6 (a) is a sectional view of a third embodiment of a television camera platform according to the present invention, and FIG. 6 (b) is a side view thereof.

[Explanation of symbols]

 21 Flexible Tube 22, 34, 39 Pan Tilt Base 23 Fixing Part 24 Pan Working Part 25, 36 Tilt Working Part 26, 35, 40 Working Part 27, 28 Fixing Tool 29 Supporting Member 30 Camera Housing 31 Transparent Window 32 Nozzle 33 Wiper 37 rotary joint 38 fixing member

Claims (3)

[Claims] 1. A pan head for a television camera capable of performing a pan operation at least by mounting a camera housing on which a television camera is installed and automatically supplying cleaning water to a transparent window of the camera housing for cleaning. In, in the cleaning liquid conduit for supplying the cleaning water for cleaning the transparent window,
A pan head for a TV camera, which is characterized by being passed through a hollow vertical axis that performs pan operation. 2. The television according to claim 1, wherein the television camera platform is configured to perform a tilting operation, and the washing water conduit is passed through a hollow horizontal shaft for performing a tilting operation. Camera platform. 3. The pan / tilt stand with a washer nozzle according to claim 2, wherein a rotatable joint arranged on the tilt axis is provided in the washing water pipe passing through the hollow horizontal shaft.