JP2528665Y2 - Camera head - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera head applied to a monitoring television camera or the like.

[0002]

2. Description of the Related Art FIG. 3 is a view for explaining the structure of a conventional camera platform used for a surveillance television camera. In the figure, the conventional camera head is driven by using a pitch motor 34 for giving an elevation angle (pitch angle) to the monitoring television camera and a yaw motor 33 for giving a yaw rotation angle (yaw angle). It has become.

[0003]

As described above, in the conventional camera platform, the pitch motor 34 and the yaw motor 3
3 and 2 are required, so the size is large.
Even if the motor is downsized and a high-speed rotation type motor is used, two reduction gears are required and the weight increases.
For this reason, handling is inconvenient at the time of installation or transportation, and also disadvantageous in price.

[0004]

SUMMARY OF THE INVENTION A camera head according to the present invention has an object to solve the above-mentioned problems, and has a yaw axis for giving a rotation angle in the yaw direction to a camera, and a camera head provided without engaging with the yaw axis.
And a pitch axis for giving an elevation angle to the camera, and an air motor which is provided in a lateral direction and is operated by air pressure supplied thereto.
If, pneumatic receives the output of the air motor via a bevel gear
And a clutch for switching to the yaw axis or the pitch axis for transmission.

[0005]

That is, in the camera head according to the present invention, the air which is provided in the horizontal direction and which is operated by the air pressure supplied thereto.
A clutch operated by pneumatic pressure receives the output of the motor via a bevel gear and is provided without engaging a yaw axis or a yaw axis which gives a rotation angle in the yaw direction to the camera. And the air
Air motor and clutch actuated by pressure
By changing the direction of the la
There is no danger of deflagration, etc., as compared to the heads of Noto. A motor that changes the direction of the camera by transmitting the output of an air motor provided in a horizontal direction to a yaw axis that gives a rotation angle in the yaw direction or a pitch axis that gives an elevation angle by receiving the output of the air motor by a clutch via a bevel gear to the camera. Can be reduced to one and the height can be reduced.
Also, when giving a yaw rotation angle to the camera,
There is no need to rotate the pitch axis, which gives
Working power is saved.

[0006]

1 and 2 are explanatory views of the structure of a camera platform according to an embodiment of the present invention. In the figure, the camera head according to the present embodiment gives an elevation angle (bitch angle) ψ and a yaw direction rotation angle に to a monitoring television camera 25 as shown in FIG. The air pressure is sent through the air pressure pipes 7 and 8 so that normal and reverse rotations are possible depending on the direction of the air pressure to be sent. Note that an electric motor may be used instead of the air motor 1. Although the air motor 1 uses the reduction gear 4 to rotate at high speed, it is not necessary especially when a low-speed motor is used. The rotational force of the air motor 1 is transmitted to the bevel gear pinion 5 via the reduction gear 4, and further transmitted to the bevel gear gear 6 which meshes with the bevel gear pinion 5 at right angles. , Bevel gear 6 and key 1
2 to the connected clutch input shaft 15. The figure shows the clutch input shaft 15 and the clutch yaw output unit 1
When the clutch input shaft 15 rotates in this state, the clutch yaw output unit 18 rotates, and the yaw shaft 2 connected to the clutch yaw output unit 18 is rotated.
0, bearing 27, camera pitch axis 28, camera mount 24
The yaw-direction rotation angle テ レ ビ is given to the television camera 25 through the like.

The lower end of the clutch input shaft 15 is
When air pressure is supplied from the pneumatic tube 10 below the piston 14 into the cylinder 11 and exhausted from the upper pneumatic tube 9, the piston 14 is pushed upward and the clutch input shaft 15 Engages with the upper clutch pitch output unit 17 while sliding the key 12, and transmits the rotational force of the air motor 1 to the pitch shaft 21 integrated with the clutch pitch output unit 17. The worm 22 and the worm gear 23 are rotated by the rotation of the pitch axis 21, and an elevation angle ψ is given to the television camera 25 via the camera pitch axis 28 and the camera mount 24. When the clutch input shaft 15 is engaged with the clutch pitch output unit 17 and the pitch shaft 21 is rotating, a brake may be provided on the yaw shaft 20 in order to make the yaw shaft 20 free.
It is more practical to apply a slight frictional force to the bearing 19 to such an extent that the yaw shaft 20 is not easily turned and is easily turned by human power. The bearing 13 also receives an axial thrust, thereby suppressing the vertical movement of the bevel gear 6.

As described above, the camera head is driven by air pressure.
The output of one air motor 1 can be switched to a yaw axis 20 for giving a rotation angle の in the yaw direction to a television camera 25 or a pitch axis 21 for giving an elevation angle ψ by using an operating clutch. The number is reduced to one, and generally one clutch is relatively lighter and cheaper than one motor with a reduction gear if the same torque and rotation speed are transmitted. Also, it works by air pressure.
By using the moving clutch and the air motor 1,
And can be used as an explosion-proof type. Further, by providing the air motor 1 horizontally using the bevel gear pinion 5 and the bevel gear 6, the height of the head is reduced and the handling is facilitated. Also, the TV camera 25
When giving a rotation angle in the yaw direction,
There is no need to rotate the camera pitch axis 28 which gives the angle.
Therefore, the output of the air motor 1 is reduced.

[0009]

[Effect of the Invention] The camera head according to the present invention is configured as described above, and has an air motor and a pneumatically operated air motor.
And the clutch changes the direction of the camera.
By doing so, compared with electric heads, etc.
Atmosphere with potential for deflagration, as there is no danger
It is very safe to use. A motor that changes the direction of the camera by transmitting the output of an air motor provided in a horizontal direction to a yaw axis that gives a rotation angle in the yaw direction or a pitch axis that gives an elevation angle by receiving the output of the air motor by a clutch via a bevel gear to the camera. Can be reduced to one and the height is reduced, so
It is lightweight and easy to handle when installed or transported, and is also advantageous in terms of price. Also, yaw the camera
When giving the camera an elevation angle when giving a rotation angle
No need to rotate the quill shaft, saving driving power
Energy can be saved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a camera platform according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a perspective view of a conventional camera platform.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air motor 2 Base frame 4 Reduction gear 5 Bevel gear pinion 6 Bevel gear gear 7, 8, 9, 10 Pneumatic tube 11 Cylinder 12 Key 13, 19, 27 Bearing 14 Piston 15 Clutch input shaft 17 Clutch pitch output part 18 Clutch yaw output Part 20 yaw axis 21 pitch axis 22 worm 23 worm gear 24 camera mount 25 television camera 26 cover 28 camera pitch axis

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masayuki Kushihara 2-4-1 Hamamatsucho, Minato-ku, Tokyo Space Development Corporation (72) Inventor Takayori Honda 10 Oecho, Minato-ku, Nagoya-shi Mitsubishi Heavy Industries, Ltd. Nagoya Aerospace Systems Works, Ltd. (72) Inventor Hiromi Tajima 60, Kutsubo, Iwazuka-cho, Nakamura-ku, Nagoya-shi 1 Inside Nakanishi Engineering Co., Ltd. (56) References JP-A-2-72297 (JP, A JP-A-3-15432 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] 1. A yaw axis for giving a rotation angle in a yaw direction to a camera, a pitch axis provided without engaging with the yaw axis and for giving an elevation angle to the camera, and air provided laterally and fed.
Camera tripod head according to claim and air motor actuated by pressure, that is operated by a pneumatically receives the output of the air motor via a bevel gear and a clutch for transmitting switching to the yaw axis or the pitch axis.