JPS6388399A - Inversion device for television camera, etc. for monitor - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a reversing device for reciprocating a surveillance television camera or the like within a predetermined angular range.

[Conventional example]

Fig. 4 shows a typical conventional example of this type of reversing device 3. In the figure, 1 is a rotating shaft connected to a monitoring television camera, etc. (not shown), and 2 is a rotating shaft for this rotation. axis 1
It is a gear that is integrally attached to the Reference numeral 3 denotes a reversible rotary motor, the output gear 4 of which is meshed with the gear 2. That is, due to the forward and reverse rotation of the motor 3, the rotating shaft 1 is rotated by the gear 2,
In this case, conventionally, a pair of limit switches 5a and 5b are arranged around the gear 2 at a predetermined angular interval, and two dogs 6a are attached to the gear 2, for example. , 6b is installed protrudingly.

Due to the contact of the dog with this limit switch.

A forward rotation signal and a reverse rotation signal of the motor 3 are obtained. Furthermore, the rotation angle of the rotary shaft 1 can be adjusted by changing the mounting positions of the dogs 6a, 6b.

[Problem that the invention seeks to solve]

However, the reversible motor 3 is expensive and has poor durability. Furthermore, since the limit switches 5a, 5b, etc. are used as rotation angle detection means, the structure is complicated due to the large number of parts, and wiring work, etc. is required, resulting in poor assembly workability.

This invention was made in view of the above-mentioned conventional drawbacks.
The object is to provide a reversing device which has a simple structure and which can perform reversing operation using a unidirectional rotary motor.

[Means for solving problems]

In order to achieve the above object, the present invention includes a disc body integrally attached to a rotating shaft connected to a surveillance television camera, etc., and an output that drives the rotating shaft via the disc body. a unidirectional rotary motor having a roller, the disc body having an arcuate groove having a width substantially wider than a diameter of an output roller of the motor over a predetermined angular range centered on the rotation axis; The motor is configured to be movable in the radial direction of the disc body, and its output roller is biased so as to constantly press against the inner circumferential wall of the upper groove.

[For production]

For example, is the output roller a circle? When the motor is operated while being pressed against the large-diameter arcuate wall of the A groove, the disc rotates, for example, clockwise due to its rotational force. When the end of the groove reaches the output roller due to this rotation, the output roller moves radially inward along the end due to its own rotation, and is now pressed against the small diameter side arcuate wall, which causes the disc to The body rotates counterclockwise. Thereafter, the same operation is repeated, and the rotating shaft rotates reciprocatingly within the range of the circular arc groove.

〔Example〕

The invention will now be described in detail with reference to embodiments illustrated in the accompanying drawings.

1 to 3, reference numeral 10 denotes a rotating shaft connected to a monitoring television camera (not shown), and a disk body 11 is integrally attached to this rotating shaft 10. As shown in FIGS.

In this embodiment, the disc body 11 is composed of two discs 1 with the same diameter.
It consists of a stack of 2.13.

Each of the discs 12, 13 has a circular arc groove 12a of the same shape formed over a predetermined angular range around the rotating shaft 10.

13a are formed respectively. Therefore, by adjusting the relative angles of the respective discs 12, 13, an overlapping portion of the arcuate grooves 12a, 13a, that is, a common arcuate groove 14 having a predetermined groove length can be arbitrarily formed.

In this case, the output roller 15a of the unidirectional rotary motor 15 is inserted into the common arcuate groove 14.

The groove width of the common arcuate groove 14 is made substantially larger than the diameter of the output roller 15a. The motor 15 is oriented vertically, that is, so that its output shaft is parallel to the rotating shaft 10, and is supported by a guide member 16 so as to be movable along the radial direction of the disc body 11. As the motor 15 moves, the output roller 15a is connected to the large diameter arc wall 14a and the small diameter arc wall 14b of the common arc groove 14.
A biasing means 17 is provided for pressing toward. The biasing means 17 includes, for example, a sliding shaft 20 that is slidably inserted into a guide cylinder 18 protruding from the upper part of the motor 15 and is biased upward by a coil bar L19 inside the cylinder. It includes a roller 21 attached to the upper end of the sliding shaft 2o, and an arcuate cam body 22 that cooperates with the roller 21.

Namely.

The roller 21 is pressed against the cam body 22 by the coil spring 19, and as the roller 21 climbs over the cam body 22, the output roller 15a is pushed against the arc wall 14 of the common arc groove 14.
It will be pressed towards either a or 14b.

Next, the operation of this reversing device will be explained. In FIG. 1, the roller 21 is located on the left side of the cam body 22, so that the output roller 15a is moved into the common arc groove 1 as shown in FIG.
When the motor 15 is operated to rotate the output roller 15a clockwise in the figure while being pressed against the large-diameter arcuate wall 14a of No. 4, the disc body 11 rotates clockwise.

When one end 14c (the lower end in FIG. 2) of the common arcuate groove 14 reaches the output roller 15a due to this rotation, the motor 15 moves along the end 14c due to the rotation of the output roller 15a. The output roller 15a moves inward in the radial direction of the disk body 11, and the output roller 15a moves onto the small diameter side arc ff14b. Along with this movement, the roller 21 moves to the cam body 22.
In order to move to the right side in Figure 1 by climbing over the
5a is now pressed against the small diameter side arc qi4b by the urging force. In this state, the one-disk body 11 will rotate counterclockwise due to the clockwise rotation of the output roller 15a, as shown in FIG. When the remaining end 14d of the common arcuate groove 14 reaches the output roller 15a, the motor 15 moves along the end 14d to the outside in the radial direction of the disc body 11 due to the rotation of the output roller 15a. and returns to the state shown in Figure 2. Thereafter, by repeating this movement, the disc body 11
The rotating shaft 10 reciprocates within the range of the groove length of the common arcuate groove 14. In this case, the output roller 15a moves only in the radial direction of the disk body 11, but the imaginary arrows in FIGS. 2 and 3 indicate the relative movement of the output roller 15a.

In this embodiment, the disc body 11 is replaced by two discs 12).
13, but if the rotation range of the rotating shaft 10 is constant and does not require adjustment, only one disc may be used.

〔effect〕

As is clear from the description of the embodiments described above, according to the present invention, an inexpensive and highly durable unidirectional rotary motor can be produced without using a reversible rotary motor or a limit switch for controlling its rotation direction. A reversing device with a simple structure can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing an embodiment of the reversing device according to the present invention, FIGS. 2 and 3 are plan views for explaining the operation of the same device, and FIG. 4 is a schematic diagram of a conventional example. FIG. In the figure, 10 is a rotating shaft, 11 is a disc body, 12.13 is a disc, 12a, 13a are arcuate grooves, 14 is a common arcuate groove, 14a
14b is the large diameter arc wall, 14b is the small diameter arc wall, 14c, 14
d is an end, 15 is a motor, 15a is an output roller, 16 is a guide member, and 17 is a biasing means. Patent Applicant: Fujitsu General Co., Ltd. Representative, Patent Attorney: Takuya Ohara Figure 1 Figure 2 Figure 3 Figure 4

Claims (3)

[Claims] (1) In a reversing device for reciprocating a surveillance television camera or the like within a predetermined angular range, a disc body is integrally attached to a rotating shaft connected to the surveillance television camera or the like; a unidirectional rotary motor having an output roller that drives the rotating shaft via the disc body,
A groove having a width substantially wider than the diameter of the output roller is formed in the disc body over a predetermined angular range centered on the rotation axis, and the motor is connected to the disc body. A reversing device for a surveillance television camera, etc., which is held movably in the radial direction and whose output roller is always urged to press against the inner circumferential wall of the groove. (2) In claim (1), the disc body is composed of a combination of two discs having the same arcuate groove, and by adjusting the relative combination angle of each disc, A reversing device for a surveillance television camera, etc., characterized in that the reversing angle of a rotation axis is set. (3) In claim (1), when the output roller moves along the edge of the groove from either one of the small-diameter side arcuate wall or the large-diameter side arcuate wall to the other; . A reversing device for a surveillance television camera or the like, characterized in that a spring biasing means for pressing the output roller toward the arcuate wall thereof is provided.