JPH0387908A - Rotation preventing mechanism - Google Patents

Abstract

PURPOSE:To attain the rotation of 360 deg. or more by turning a lock member of a supporter in response to the rotation of a rotary shaft in a state where a part to be locked of the rotary shaft is locked at a lock part. CONSTITUTION:A rotary shaft 10 is rotated up to a prescribed rotational position and a lock member 12 of a supporter 11 is turned more to rotate the shaft 10 up to a desired rotational position in response to the rotation of the shaft 10 with a part 10a to be locked kept locked by the member 12. In such a constitution, the rotational angle of the shaft 10 is set in an allowable rotational angle range of 360 deg. or more without using any special control means. As a result, the constitution is attained for a rotation preventing mechanism together with a compact and light-weight structure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a rotation stop mechanism used in a rotary drive device or the like that controls the direction of an antenna mounted on an artificial satellite, for example.

(Prior Art) Generally, in an antenna rotation drive device, since a cable is wired to the antenna which is a rotating body,
A rotation stopping mechanism called a mechanical stopper is provided to regulate the rotation angle of the antenna at a constant co-rotation angle.

Figure 3 shows such a conventional rotation stop mechanism.
A rotating shaft 2 of a rotating body such as a counter mirror is rotatably provided on the fixed support 1. Of these, the rotating shaft 2 is provided with a locked portion 3 for preventing rotation.

A locking portion 4 is formed on the other support body 1 at a predetermined position corresponding to the locked portion 3 of the rotating shaft. In this locking part 4, the rotation angle of the rotating shaft 2 is initially 0 degrees, and when one end of the locked part 3 is locked at the end of the rotating shaft 2 and the rotating shaft 2 is rotated clockwise in the figure, The other end of the locked portion 3 is locked to the other end, and the rotating shaft 2 is regulated at a predetermined rotation angle.

However, in the above rotation stopper mechanism, the locking portion 4 of the support body 1
Since the locked portion 3 must have a certain width, it is difficult to set the allowable rotation angle range of the rotating shaft 2 to a range of 0 degrees to 360 degrees or more. .

Therefore, as a rotation stopping mechanism that enables an allowable rotation angle range of 0 degrees to 360 degrees or more, a first locking part 4a that locks on the support 1 at a rotation angle of 0 degrees as shown in FIG. A second locking portion 4b that locks at a desired rotation angle of 360 degrees or more is provided so as to be movable in and out corresponding to the locked portion 3 of the rotating shaft 2, and the first and second locking portions 4a, 4b in and out according to the rotation angle of the rotary shaft 2, the rotary shaft 2 can be adjusted to 0 degrees and 3 degrees.
A method of regulating the rotation angle by a desired rotation angle of 60 degrees or more has been considered.

However, in the above-mentioned rotation stop mechanism, the movement of the first and second locking parts 4a and 4b must be controlled according to the rotation angle of the rotating shaft 2, so the control is very troublesome and the handling thereof is complicated. At the same time, its structure is extremely complicated,
It has the problem of being large. This is especially true for small and
This is a major problem in space development, which requires both weight reduction and high precision.

(Problems to be Solved by the Invention) As described above, with conventional rotation stop mechanisms, it is difficult to regulate rotation angles of 360 degrees or more, or the structure is complicated and large. There was a problem.

This invention has been made in view of the above circumstances, and aims to simplify the structure, realize reliable regulation of the allowable rotation range of 360 degrees or more, and realize as small and light weight as possible. The purpose of the present invention is to provide a rotation stopper mechanism.

[Structure of the Invention] (Means and Effects for Solving the Problems) The present invention provides a locking portion for stopping rotation provided on a rotating body rotatably supported on a support, and a locked portion provided on the support. a locking portion for stopping rotation, wherein one end and the other end of the locked portion are locked to one end and the other end at first and second rotational positions controlled by the rotating body; At the second rotational position of the rotating body where the other end of the locked part is locked to the other end of the locking part, the locked part is moved by a predetermined distance in the rotational direction relative to the support, and corresponds to a second rotational position of the rotary body that locks with the other end of the locked portion in conjunction with the reversal drive of the rotary body. A rotation stopping mechanism is provided with a locking portion moving means for returning to the original position.

According to the above configuration, when the rotating body is rotationally driven from the initial first rotational position and reaches the second rotational position, the locked part of the rotating body is locked with the locking part of the support body, and the subsequent In conjunction with the rotation, the locking part of the support body is urged and moved relative to the support body, whereby the locking part and the locking part are moved further from the second rotational position to a desired rotation angle. , the locked part is regulated by the locking part and stopped at that rotational position. Then, when the rotating body is driven in reverse from this state,
The locking part of the support body is returned to the original position corresponding to the second rotational position of the rotating body, and then the rotating body is moved so that the locked part of the rotating body is separated from the locking part in conjunction with the reversal drive. , again, the first
When the rotation position is reached, it is stopped by the locking part. Therefore, the rotation angle of the rotating body can be set within an allowable rotation range of 360 degrees or more.

Further, a locking portion for preventing rotation provided on a rotary body rotatably supported by a support body, and a locked portion provided on the support body at first and second rotational positions controlled by the rotary body. , a locking part for preventing rotation in which one end and the other end of the locked part are locked to the one end and the other end, and the other end of the locked part is connected to the other end of the locking part. At a second rotational position of the rotating body to be locked, the locked portion is moved by a predetermined distance in a direction opposite to the rotational direction relative to the rotating body in conjunction with the rotational drive of the rotating body in the rotational direction. and a locked part moving means for interlocking the reversing drive of the rotating body and returning the rotating body to an original position corresponding to a second rotational position of the rotating body that locks with the other end of the locking part. The rotation stop mechanism is constructed using the following mechanism.

According to the above configuration, when the rotating body is rotationally driven from the initial first rotational position and reaches the second rotational position, the locked part of the rotating body is locked with the locking part of the support body, and the subsequent In conjunction with the rotation, the locked portion is urged and moved in the reverse direction by the locking portion of the support, and thereby rotated from the second rotation position to a desired rotation angle that is further rotated in the same direction. , the locked part is regulated by the locking part and stopped at that rotational position.

Then, when the rotating body is reversely driven from this state, the locked part of the rotating body is returned to the original position corresponding to the second rotational position of the rotating body, and then separated from the locking part. When the first rotational position is reached again, the locked portion is locked and regulated by the locking portion, and is stopped. Therefore, the rotation angle of the rotating body can be set within an allowable rotation range of 360 degrees or more.

Furthermore, a locked portion for preventing rotation provided on a rotary body rotatably supported by a support body, and a locked portion provided on the support body at first and second rotational positions controlled by the rotary body. ,
A locking portion for preventing rotation, in which one end and the other end of the locked portion are locked to the one end and the other end, and the other end of the locked portion is locked to the other end of the locking portion. The second part of the rotating body
At the rotational position, the locking part is moved a predetermined distance in the rotational direction relative to the support in conjunction with the rotational drive of the rotating body, and the locked part is moved relative to the rotating body. The locking part and the locked part are moved by a predetermined distance in the opposite direction to the rotational direction, and the locking part and the locked part are connected to the other end of the locking part and the other end of the locked part in conjunction with the reversal drive of the rotating body. The rotation stopping mechanism is provided with a lock for returning the rotating body to the original position corresponding to the second rotational position at which the rotating body is locked, and a locked portion moving means.

According to the above configuration, when the rotating body is rotationally driven from the initial first rotational position and reaches the second rotational position, the locked portion of the rotating body is locked to the locking member of the support body, and the subsequent In conjunction with the rotation, the locking portion of the support body is urged and moved relative to the support body, and the locked portion is urged in the reverse direction by the locking portion of the support body and moved. By doing so, the second
It is further rotated from the same rotation position to a desired rotation angle, and at that rotation position, the movement of the locked part and the locking part is regulated and stopped. Then, when the rotating body is reversely driven from this state, the locking part of the support body and the locked part of the rotating body are returned to their original positions corresponding to the second rotational position of the rotating body, and then, In conjunction with the reversal drive, the locked portion of the rotating body is separated from the locking portion, and when the rotating body reaches the first rotational position again, it is locked and stopped by the locking portion. Therefore, the rotation angle of the rotating body can be set within an allowable rotation range of 360 degrees or more.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a rotation stop mechanism according to an embodiment of the present invention. In the figure, reference numeral 10 denotes a rotation axis of a rotating body such as a reflector whose orientation is controlled with respect to a target. Rotatably supported. Of these, the rotating shaft 10 is connected to a drive source (not shown), and controls the pointing direction of a reflecting mirror (not shown) in conjunction with its rotation. The rotating shaft 10 is provided with a locked portion 10a for stopping rotation at a predetermined position.

On the other hand, the support body 11 is provided with a locking member 12 for preventing rotation, which constitutes a locking portion, and corresponds to the locked portion 10a. For example, the locking member 12 is rotatably provided via a shaft 12a, and one end of a spring member 13 is locked to one end thereof. The other end of the spring member 13 is engaged with a spring engagement portion 14 provided on the support body 11 . A pair of first and second position regulating portions 15a and 15b are provided at both ends of the support body 11 with the locking member 12 interposed therebetween, with a predetermined interval therebetween.

In the above configuration, the rotating shaft 10 has one end of the locked portion 10a locked with one end of the locking member 12 of the support body 11 at the rotational position where the initial rotation angle is 0 degrees (the first (See figure (a)). The other end of the locking member 12 is positionally restricted by a first position restricting portion 15a, and restricts the rotation of the rotating shaft 10 in the counterclockwise direction in the drawing. When the rotating shaft 10 is rotationally driven in the clockwise direction in the figure by the drive source (not shown), the locked portion 10a is separated from the locking member 12 of the support body 11, and is interlocked with the rotation. Then, the other end of the locked portion 10a is locked to the other end of the locking member 12 (see FIG. 2(a)).

Next, when the rotating shaft 10 is rotated in the same direction, the rotating shaft 10
The locked portion 10a urges the locking member 12 of the support body 11 against the spring force of the spring member 13, and the locking member 12
is rotated counterclockwise in the figure until it is locked by the second position regulating portion 15b. As a result, the rotating shaft 10 is further rotated together with the locking member 12, and the locked portion 10a is regulated by the locking member 12 and stopped at a rotation position having a desired rotation angle of 360 degrees or more. (Fig. 2(b)
)reference).

Further, when the drive source (not shown) is reversed from the state where the rotating shaft 10 is rotated to a predetermined rotation angle as shown in FIG. 2(b), the rotating shaft 10 rotates counterclockwise in the figure. driven,
In conjunction with the reversal, the locking member 12 of the support body 11 is returned to its original position where it is locked to the first position regulating portion 15a by the spring force of the spring member 13. Then, when the rotating shaft 10 is further reversed, the rotating shaft 10 locks the locked portion 1.
With the other end of 0a separated from the other end of the locking member 12 and reaching the rotation position where the initial rotation angle is 0 degrees again,
One end of the locked portion 10a is locked and stopped by one end of the locking member 12 (see FIG. 1(a)).

In this manner, the rotation stopper mechanism rotates the rotating shaft 10 to a predetermined rotational position, and the locked portion 10a of the rotating shaft 10 rotates to the locking member 1.
2, in conjunction with the rotation of the rotating shaft 10,
The locking member 12 of the support body 11 is further rotated and the rotation shaft 1
0 to a desired rotational position, the first
And, the rotation angle of the rotating shaft 10 can be set within the permissible rotation angle range of 360 degrees or more without taking any special control means to control the movement of the second locking parts 4a, 4b (see FIG. 4). Therefore, the structure can be simplified and simplified, and the size and weight can be reduced as much as possible.

In the above embodiment, the locking member 12 of the support body 11 is rotatably provided, and when the rotary shaft 10 reaches a predetermined rotational position from the initial rotational position, By moving the locking member 12 with respect to the support body 11, the rotating shaft 1° is configured to be rotatable at a rotation angle of 360 degrees or more, but the invention is not limited to this, and the locked portion 10a of the rotating shaft 10 is movably provided, and when the rotating shaft 10 reaches a predetermined rotational position, the locked portion 10a is moved relative to the rotating shaft 10, thereby realizing rotation of the rotating shaft by 360 degrees or more. It is also possible to configure Also,
Locking member 12 of support body 11 and locked portion 1 of rotating shaft 10
It is also possible to implement a configuration in which rotation of 360 degrees or more is achieved by moving both of the rotating shafts 0a with the rotating shaft 10 reaching a predetermined rotational position.

Further, in the above embodiment, the locking member 12 provided on the support body 11 is configured to be rotatable, but the configuration is not limited to this, and the locking member 12 may be configured to move linearly. It is possible.

Therefore, it goes without saying that the present invention is not limited to the above embodiments, and that various modifications can be made without departing from the spirit of the invention.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to simplify the configuration, realize reliable regulation of the allowable rotation range of 360 degrees or more, and make it as small and lightweight as possible. It is possible to provide a rotation stop mechanism that can be realized.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing a rotation stop mechanism according to an embodiment of the present invention, Fig. 2 is a diagram shown to explain the operation of Fig. 1, and Figs. 3 and 4 are conventional rotation stop mechanisms. It is a block diagram which shows a mechanism. 10... Rotating shaft, 10a... Locked part, 11...
Support body, 12... Locking member, 12a... Shaft, 13...
...Spring member, 14...Spring engaging portion, 15a, 15b
...first and second position regulating parts.

Claims (3)

[Claims] (1) A locked part for stopping rotation provided on a rotary body rotatably supported by a support; and a first locking part provided on the support and controlled by the rotary body.
and a locking portion for stopping rotation, in which one end and the other end of the locked portion are locked to the one end and the other end in the second rotational position; At the second rotational position of the rotating body that is locked to the other end of the stop part, the locked part is moved to a predetermined rotational direction relative to the support body in conjunction with the rotational drive of the rotating body in the rotational direction. Locking part moving means for moving the rotating body by a distance and returning it to the original position corresponding to a second rotational position of the rotating body that locks with the other end of the locked part in conjunction with the reversal drive of the rotating body. A rotation stop mechanism characterized by comprising: (2) a rotation-stopping locked portion provided on a rotary body rotatably supported by a support; and a first locking portion provided on the support and controlled by the rotary body.
and a locking portion for stopping rotation, in which one end and the other end of the locked portion are locked to the one end and the other end in the second rotational position; At a second rotational position of the rotary body that is locked to the other end of the stop portion, the locked portion is rotated in a direction opposite to the rotational direction relative to the rotary body in conjunction with the rotational drive of the rotary body in the rotational direction. a locked object that is moved by a predetermined distance and returned to an original position corresponding to a second rotational position of the rotating object that locks with the other end of the locking part in conjunction with the reversal drive of the rotating object; What is claimed is: 1. A rotation stopper mechanism characterized by comprising: a rotation stopper mechanism; (3) a rotation-stopping locked part provided on a rotary body rotatably supported by a support; and a first locking part provided on the support and controlled by the rotary body.
and a locking portion for stopping rotation, in which one end and the other end of the locked portion are locked to the one end and the other end in the second rotational position; At the second rotational position of the rotating body that is locked to the other end of the locking member, the locking portion is moved a predetermined distance in the rotational direction from the support body in conjunction with the rotational drive of the rotating body in the rotational direction. and moves the locked part by a predetermined distance in a direction opposite to the rotating direction with respect to the rotating body, and in conjunction with the reversal drive of the rotating body, the locking part and the locked part are moved. A locking and locked part moving means is provided for returning the other end of the locking member and the other end of the locked part to the original position corresponding to a second rotational position of the rotary body to which the other end of the locking member and the other end of the locked part are locked. A rotation stop mechanism characterized by: