JPH0538496U - Camera platform - Google Patents

Abstract

(57) [Summary] [Purpose] The objective is to reduce size and weight. [Structure] The output of the motor is switched and transmitted by a clutch to a rotation shaft that gives a rotation angle in the yaw direction to the camera or a drive mechanism 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 video camera or the like.

[0002]

[Prior Art]

 FIG. 5 is a structural explanatory view of a conventional camera platform used in a surveillance video camera. In the figure, a conventional camera platform is driven by using a pitch motor 34 that gives an elevation angle (bitch angle) and a yaw motor 33 that gives a rotation angle (yaw angle) in the yaw direction to a surveillance video 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 downsized 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-mentioned problems. A rotary shaft that gives a rotation angle in the yaw direction to the camera, a drive mechanism that gives an elevation angle to the camera, and an output of the motor are set to the rotary shaft or The present invention is characterized by a configuration including a clutch for switching and transmitting to the drive mechanism.

[0005]

[Action]

 That is, in the camera platform according to the present invention, the output of the motor is switched and transmitted by the clutch to the rotation axis that gives the camera a rotation angle in the yaw direction or the drive mechanism that gives the camera an elevation angle. , The number of camera drive motors can be reduced to one, and the size and weight can be reduced.

[0006]

【Example】

1 to 4 are structural diagrams of the camera platform according to the first to fourth embodiments of the present invention. In FIG. 1, the camera platform according to the first embodiment provides an elevation angle (pitch angle) ψ and a rotation angle ψ in the yaw direction to a surveillance video camera 22 or a television camera as shown in the figure. The rotation angle ψ and the rotation angle ψ in the yaw direction are both given by driving the pitch rotation shaft 15 or the yaw direction rotation shaft 10 via the clutch 8 by the motor 1 mounted on the base 2. The motor 1 is an electric or pneumatically driven motor, and is driven by nitrogen N ₂ gas especially when the platform is used as an explosion-proof type. The output shaft 1a of the motor 1 is supported by a bearing 4 attached to a pedestal 3 so that the output shaft 1a of the motor 1 does not swing around when the motor 1 rotates. The rotation of the output shaft 1a is transmitted to the piston 6 of the clutch 8 via the slide key 11b. The piston 6 is inserted and removed by the pressure of air or nitrogen N ₂ gas from the pressure inlet / outlet pipe 5, but an electromagnetic clutch can also be used.

A rotary shaft 10 in the yaw direction is provided between the video camera 22 and the clutch 8 so as to be supported by bearings 11 and 12, and when there is no gas pressure from the pressure inlet / outlet pipe 5, a spring 7 is provided. It is set so that the piston 6 is engaged with the lower part of the yaw rotating shaft 10 by the force of pushing down on the piston 6 and the clutch 8 is switched to the yaw rotating shaft 10, and the output shaft 1a of the motor 1 is set to the clutch. The rotation is transmitted to the yaw direction rotation shaft 10 by being coupled with the yaw direction rotation shaft 10 via 8. This rotation gives the rotation angle Ψ in the yaw direction to the video camera 22 via the rotation bracket 20 and the camera support plate 21.

A link mechanism including a rotary plate 9, a pitch rotary shaft 15, a pitch moving fitting 17, a connecting rod 18, a camera drive arm 19, a rotary bracket 20 and the like is provided between the video camera 22 and the clutch 8. When the gas pressure is sent from the pressure inlet / outlet pipe 5, this pressure pushes the piston 6 upward against the spring 7 and fits it with the rotary plate 9, thereby rotating the output shaft 1a of the motor 1. Is transmitted from the rotary plate 9 to the pitch rotary shaft 15. A male screw is engraved on the pitch rotating shaft 15, and the pitch moving tool 17 screwed with the male screw moves up and down by the rotation of the pitch rotating shaft 15. It should be noted that a rotation stopping brake 14 is provided so that the pitch moving metal fitting 17 and the like do not rotate together with the pitch rotating shaft 15 and is locked via the yaw direction rotating shaft 10 and the rotating bracket 20. The gas pressure from the pressure inlet / outlet pipe 5 is simultaneously applied to the brake 14 to operate the brake 14. A thrust bearing 16 is provided above the pitch rotary shaft 15 so as to receive upward thrust. As the pitch moving metal fitting 17 moves up and down, the elevation angle ψ is given to the video camera 22 via the connecting lot 18 and the camera driving arm 19. When the gas pressure from the pressure inlet / outlet pipe 5 is released, the brake 14 is released by the spring 14a, and the clutch 8 is switched to the yaw direction rotary shaft 10 by the spring 7. If a high-speed low-torque motor is used as the motor 1, it is necessary to use a speed reducer. However, as shown in FIG. By combining 24 and gear 25, the entire camera platform can be lowered, which is effective when the height is limited.

As described above, the above camera platform uses the clutch 6 to provide the yaw-direction rotary shaft 10 that gives the yaw-direction rotation angle to the video camera 22 or the transmission mechanism that gives the elevation angle to the video camera 22. By making it switchable, the number of motors 1 is reduced to one. Generally, one clutch is relatively lighter than one motor if the same torque and rotational speed are transmitted. It is cheap. Further, when giving the rotation angle Ψ in the yaw direction to the video camera 22, it is not necessary to rotate the drive unit such as the pitch motor unlike the conventional camera platform, and the weight of the rotating unit reduces the drive power to save the power. Energy is possible. In addition, the overall size is made smaller and lighter, the operability is improved, and the transportation becomes easier.

Further, in the camera platform according to the third embodiment, the pitch moving fitting 26 is deformed as shown in FIG. 3, and the output shaft 1 a of the motor 1 is rotated via the clutch 8 to the pitch rotation shaft 28. Is transmitted, the pitch moving metal fitting 26 moves up and down while the rotation is suppressed by the guide rod 29, and the arm 27a fitted to the pitch moving metal fitting 26 via the tip ball also moves up and down. The axis 27 is tilted so as to give the video camera 22 an elevation angle ψ. As a result, the same operation and effect as those of the camera platform according to the first embodiment can be obtained.

Further, in the camera platform according to the fourth embodiment, as shown in FIG. 4, in order to obtain a large elevation angle ψ of the video camera 22, a worm 30 and a gear 31 are combined instead of the pitch moving fitting. The rotation of the pitch rotation shaft 15 is transmitted to the video camera 22 via these, and the elevation angle ψ is given. The mechanism for giving the rotation angle Ψ in the yaw direction to the video camera 22 by the clutch 8, the yaw direction rotation shaft 10, etc. is the same as that of the camera platform according to the first embodiment. Thereby, the same operation and effect as the camera platform according to the first embodiment are obtained.

[0012]

[Effect of the device]

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

[Brief description of drawings]

1A is a cross-sectional view of a camera platform according to a first embodiment of the present invention, FIG. 1B is a side view of a main part, and FIG.
FIG. 3 is a perspective view of a main part.

FIG. 2A is a sectional view of a camera platform according to a second embodiment of the present invention, and FIG. 2B is a side view of a main part.

FIG. 3 (a) is a sectional view of a camera platform according to a third embodiment of the present invention, and FIG. 3 (b) is a sectional view of FIG.
FIG.

FIG. 4A is a sectional view of a camera platform according to a fourth embodiment of the present invention, and FIG. 4B is a sectional view of a main part.

FIG. 5 is a perspective view of a conventional camera platform.

[Explanation of symbols]

 1 Motor 1a Output shaft 1b Sliding key 2 Base 3 Frame 4 Bearing 5 Pressure inlet / outlet pipe 6 Piston 7 Spring 8 Clutch 9 Rotating plate 10 Yaw direction rotating shaft 11 Bearing 12 Bearing 14 Brake 14a Spring 15 Pitch rotating shaft 16 Thrust bearing 17 Pitch movement Metal fitting 18 Connecting rod 19 Camera drive arm 20 Rotating bracket 21 Camera support plate 22 Video camera 23 Gear 24 Pinion 25 Speed reducer 26 Pitch moving metal fitting 27 Camera drive shaft 27 Arm 30 Worm 31 Gear

 ─────────────────────────────────────────────────── ─── 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) Mamoru Makishima, Iwazuka-cho, Nakamura-ku, Nagoya No. 60, No. 1 In Nakabishi Engineering Co., Ltd. (72) Inventor, Hiromi Tajima, No. 1, No. 60, Kutani, Nakatsu Ward, Nakamura-ku, Nagoya

Claims (1)

[Scope of utility model registration request] 1. A rotation shaft for giving a rotation angle in a yaw direction to a camera, a drive mechanism for giving an elevation angle to the camera, and a clutch for switching and transmitting the output of the motor to the rotation shaft or the drive mechanism. A camera platform featuring.