JPH0538495U - Camera platform - Google Patents

Abstract

(57) [Abstract] [Purpose] The purpose is to reduce the size and weight and reduce the height. The output of a motor provided in a lateral direction is received by a clutch via a bevel gear and is switched and transmitted to a yaw axis that gives a rotation angle in the yaw direction or a pitch axis that gives an elevation angle to the camera.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a camera platform applied to a surveillance television camera or the like.

[0002]

[Prior Art]

 FIG. 3 is a structural explanatory view of a conventional camera platform used in a surveillance television camera. In the figure, the conventional camera platform is driven by using a total of two units, a pitch motor 34 that gives an elevation angle (pitch angle) and a yaw motor 33 that gives a rotation angle (yaw angle) in the yaw direction to the surveillance TV camera. It has become.

[0003]

[Problems to be solved by the device]

 As described above, the conventional camera platform is large in size because it requires the pitch motor 34 and the yaw motor 33 in total of two units. Even if the motor is miniaturized and a high-speed rotation type motor is used, two reduction gears are required and the weight increases. Therefore, it is inconvenient to handle when installing or transporting, and it is also disadvantageous in terms of price.

[0004]

[Means for Solving the Problems]

 The camera platform according to the present invention is intended to solve the above problems, and includes a yaw axis that gives a rotation angle in the yaw direction to the camera, a pitch axis that gives an elevation angle to the camera, and a motor provided in a lateral direction. And a clutch that receives the output of the motor via a bevel gear and switches the output to the yaw shaft or the pitch shaft.

[0005]

[Action]

 That is, in the camera platform according to the present invention, the output of the motor provided in the lateral direction is received by the clutch via the bevel gear and switched to the yaw axis that gives the camera a rotation angle in the yaw direction or the pitch axis that gives the elevation angle. Since the number of motors for driving the camera can be reduced to one, the size and weight can be reduced and the height can be reduced.

[0006]

【Example】

 1 and 2 are structural diagrams of a camera platform according to an embodiment of the present invention. In the figure, the camera platform according to the present embodiment gives an elevation angle (bitch angle) ψ and a rotation angle ψ in the yaw direction to a surveillance TV camera 25 as shown in the figure, and the air motor 1 is used as a drive source thereof. It is used horizontally, and the air pressure is sent through the air pressure pipes 7 and 8. It is possible to rotate forward and backward depending on the direction of the sent air pressure. An electric motor may be used instead of the air motor 1. Further, although the speed reducer 4 is used to rotate the air motor 1 at a 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 through the speed reducer 4, and further transmitted to the bevel gear gear 6 that meshes with the bevel gear pinion 5 at a right angle so that the rotational force is changed from the horizontal direction to the vertical direction. It is converted and transmitted to the clutch input shaft 15 which is connected to the bevel gear 6 via the key 12. The figure shows a state in which the clutch input shaft 15 and the clutch yaw output unit 18 are fitted together. When the clutch input shaft 15 rotates in this state, the clutch yaw output unit 18 rotates and is connected to the clutch yaw output unit 18. The rotation angle Ψ in the yaw direction is given to the television camera 25 via the yaw axis 20, the bearing 27, the camera pitch axis 28, the camera mount 24, etc.

The lower end of the clutch input shaft 15 is connected to the piston 14 in the cylinder 11. When air pressure is supplied from the air pressure pipe 10 below the piston 14 into the cylinder 11 and exhausted from the air pressure pipe 9 above, The piston 14 is pushed upward, and the clutch input shaft 15 slides on the key 12 and engages with the upper clutch pitch output part 17, and the rotational force of the air motor 1 is transferred to the pitch shaft 21 integrated with the clutch pitch output part 17. Tell. The rotation of the pitch shaft 21 causes the worm 22 and the worm gear 23 to rotate, thereby giving an elevation angle ψ to the television camera 25 via the camera pitch shaft 28 and the camera mount 24. When the clutch input shaft 15 is fitted to the clutch pitch output unit 17 and the pitch shaft 21 is rotating, the yaw shaft 20 is free so that a brake may be provided on the yaw shaft 20. However, it is more practical to give the bearing 19 a slight frictional force so that the yaw shaft 20 does not easily rotate, and a slight frictional force that allows the yaw shaft 20 to rotate freely with human power. The bearing 13 is also adapted to receive thrust in the axial direction, and suppresses the vertical movement of the bevel gear 6.

As described above, the camera platform uses the clutch to output the output of one air motor 1 to the yaw axis 20 which gives the rotation angle Ψ in the yaw direction to the television camera 25, or the pitch axis 21 which gives the elevation angle ψ. The number of air motors 1 is reduced to one by making it possible to switch to one. Generally speaking, if the same torque and rotation speed are transmitted, one clutch is more relative to one motor with a reduction gear. It is lightweight and inexpensive. Further, the bevel gear pinion 5 and the bevel gear 6 are used to provide the air motor 1 in a horizontal position, thereby reducing the height of the main platform and facilitating the handling.

[0009]

[Effect of the device]

 Since the camera platform according to the present invention is configured as described above, it is compact and lightweight, and its height is reduced, so that it is convenient to handle during installation or transportation, and it is also advantageous in terms of price. .

[Brief description of 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 along the line II-II in FIG.

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

[Explanation of symbols]

 1 Air Motor 2 Base Stand 4 Reduction Gear 5 Bevel Gear Pinion 6 Bevel Gear Gear 7, 8, 9, 10 Pneumatic Pipe 11 Cylinder 12 Key 13, 19, 27 Bearing 14 Piston 15 Clutch Input Shaft 17 Clutch Pitch Output 18 18 Clutch Yaw Output 20 yaw axis 21 pitch axis 22 worm 23 worm gear 24 camera mount 25 television camera 26 cover 28 camera pitch axis

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuo Saki 2-4-1 Hamamatsucho, Minato-ku, Tokyo Inside Space Development Project (72) Inventor Masayuki Kushihara 2-4-1 Hamamatsucho, Minato-ku, Tokyo No. 1 Space Development Enterprise (72) Inventor Takayori Honda, 10 Oe-cho, Minato-ku, Nagoya Mitsubishi Heavy Industries, Ltd. Nagoya Aerospace Systems Works (72) Inventor Hiromi Tajima, Iwazuka-cho, Nakamura-ku, Nagoya No. 60, 1 in Nakabishi Engineering Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A yaw axis that gives a rotation angle in a yaw direction to a camera, a pitch axis that gives an elevation angle to the camera, a motor provided in a lateral direction, and an output of the motor via a bevel gear. Alternatively, a camera platform having a clutch for switching and transmitting to the pitch axis.