JP2651772B2 - Split positioning mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for dividing and positioning a rotating body at predetermined angles.

[0002]

2. Description of the Related Art For example, a motor or the like is used as a drive source for dividing and positioning a rotating body at predetermined angles by a time switch or the like. When the divided positioning angle is small, accurate positioning control is required for controlling the rotation amount of the motor, which complicates a control circuit and the like.

[0003]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to enable a divided positioning by a simple operation without using a driving source such as a motor.

[0004]

According to the present invention, a rotating body to be divided and positioned is urged to rotate and stopped by a stopping means, and the rotating body can be relatively displaced in a rotating direction. A rotation angle regulating member urged back by a spring is provided, and the rotation angle regulating member has a plurality of engaging portions in a circumferential direction to regulate a relative displacement area with the rotating body,
By providing an engagement piece between the release portion and the engagement portion of the stopping means on the operating member, the rotating member is rotated by a predetermined angle by the rotational urging force and stopped by the operation of the operating member. This regulates the dividing position angle of the rotating body.

[0005]

1 to 5 show an embodiment in which the division positioning mechanism of the present invention is incorporated in a time switch 1. FIG. The time switch 1 has a drive source 9 such as a motor outside the machine frame 2 as in the conventional case, and the rotation thereof is transmitted to the friction gear 5 via the reduction gear train 3 and the gear 4. introduce. The gear 4 and the friction gear 5 are rotatably supported on gear shafts 6 and 7 fixed to the machine frame 2, respectively.

[0006] As shown in FIG.
In addition, it is connected to the gear 10 and is engaged with the seesaw bar 8 at one end of a shaft part integral therewith, and can move in the direction of the gear shaft 7 together with the gear 10 against the coil spring 11 on the machine frame 2 side. It has become. Friction gear 5 and gear 1
0, the rotational force of the friction gear 5 is
A slip ring 12 made of a spring material is provided for frictionally transmitting the slip ring 12. The seesaw bar 8 is supported by a fulcrum 13 integral with the machine frame 2 so as to be capable of seesaw movement.

The gear 10 meshes with a main gear 16 a of the rotating body 16 to drive the cam 14. This rotating body 16 is supported by the machine casing 2,
It is integral with the main shaft 17 of the first time limit setting means 15 and is in a relationship interlocked with the cam 14 at a predetermined play angle by the projection 17a of the main shaft 17. Here, gear train 3, gear 4, friction gear 5, drive source 9, gear 10
And the spring 12 is a stopping means 4 for the rotating body 16.
5. Here, the stopping means 45 is connected to the motor 9.
Around the rotating body 16 when not receiving the rotating force from
Hold in the stopped state.

The main shaft 17 is urged by a driving force generating means 25 such as a coil spring in a time setting direction, that is, clockwise in FIG. 1, so that the main shaft 17 can be externally operated for the time setting operation. It protrudes outside from the frame 2 part. The cam 14 has a circumferential cam surface 19 and one cam groove 20.
The portion 0 is in contact with the tip of the switch lever 21. Here, the cam 14, the main gear 16a and the main shaft 17
The first time limit setting means 15 is configured.

The switch lever 21 is rotatably supported on the machine frame 2 by a lever shaft 22. The switch lever 21 is in contact with the movable switch body 23 of the pair of switch bodies 23, 24 on the back side. The switch bodies 23 and 24
Is fixed to the machine frame 2 at the base end, and is electrically connected to an electric device to be controlled.

The rotating body 16 has a rotation angle restricting member 27, a coil spring 28, a stopper portion 34, and rotation restricting stoppers 29 and 30 as rotation angle restricting means 26 around the main shaft 17. I have. Rotation angle regulating member 27
Is provided on the same center as the main shaft 17 by a retaining ring 31.
It is rotatably supported on the main shaft 17 and is urged clockwise in FIG. 1 by a coil spring 28 provided between the rotation angle regulating member 27 and the rotating body 16.

The rotation angle regulating member 27 has a ring shape.
It has two engaging portions 32 and 33 at its outer peripheral edge . One of the engaging portions 32 has a circular shape on the rotating body 16.
It is located between a pair of stoppers 29 and 30 formed as arcs . The two stoppers 29 and 30 form a rotation angle α with respect to the rotation center of the rotating body 16 as shown in FIG. 5A, and correspond to a short time setting minimum time. In addition, the rotating body 16 forms a stopper portion 34 at a position next to the engaging portion 33.

Next, the driving force generating means 25 operates according to the operation of the operating means 35. That is, the operation means 3
5 is attached by a shaft 37 integral with the operating member 36 so as to be able to move against the coil spring 38 in the direction of the shaft 37 in a detented state with respect to the machine frame 2.
The engaging piece 39 faces a position facing the engaging portions 32 and 33, and the distal end of the releasing portion 40 corresponds to the end of the seesaw bar 8.

A cam lever 41 is rotatably supported on the shaft 37 around the shaft 37. The tip of the cam lever 41 is located at a position where it comes into contact with the operation projection 44 of the switch lever 21, and is in contact with a fixed cam slope 43 integrally formed with the machine frame 2 at the opposite cam follower 42.

Here, the cam 14, the rotating body 16, the driving force generating means 25, the turning angle regulating means 26 and the operating means 35
Constitutes the second time limit setting means 18. As described above, the rotation angle restricting means 26 controls the rotation angle α of the cam 14 in the time setting direction.
7, a coil spring 28, stoppers 29 and 30, engaging portions 32 and 33, and a stopper portion 34. The operation means 35 includes a seesaw bar 8, an operation member 36, an engagement piece 39, a release portion 40 and a cam lever 41.
It is constituted by.

The long time period is set by the first time period setting means 15.
Is set by At the time of setting the user, the user
, The main shaft 17 is rotated clockwise in FIG. 1 by an angle corresponding to a desired long time period. With the rotation of the main shaft 17 at this time, the cam 14 also rotates clockwise by an angle corresponding to a long time period, and the time period is set. During this rotation operation, the gear 10 is also rotated by the main gear 16a. However, the transmission path from the gear 10 to the drive source 9 becomes a load in the speed increasing direction and is interrupted by the slip rotation of the slip ring 12, so that the rotation of the gear 10 is transmitted to the friction gear 5, the gear train 3 and the drive source 9. Not transmitted.

With this long time setting, the cam sliding contact portion of the switch lever 21 comes out of the cam groove 20 of the cam 14 and comes into contact with the high cam surface 19, so that the switch lever 21 rotates clockwise, thereby turning the movable switch body. In order to press 23, a pair of switch bodies 23 and 24 are set in an ON state by contact. Therefore, the electric device to be controlled operates, and at the same time, the drive source 9 such as a motor is energized to start.

The rotation of the drive source 9 returns to the cam 14 via the gear train 3, the gear 4, the friction gear 5, the slip ring 12, the gear 10, the main gear 16a, the main shaft 17 and the projection 17a as a load in the deceleration direction. Is transmitted as rotation. After the elapse of a desired long time, in the process in which the cam sliding contact portion of the switch lever 21 falls from the cam surface 19 into the cam groove 20, the switch lever 21 receives the pressing force from the switch body 23, and the cam 14 is instantaneously moved by the play. , The pair of switch bodies 23 and 24 are instantaneously turned off by separating. At this time, the electric device to be controlled is set to the off state, and at the same time, the drive source 9 is also turned off and stopped. While the main shaft 17 rotates in the return direction, the driving force generation means 25 stores the clockwise rotation force and prepares for a short time limit setting.

The short time period setting is performed by the second time period setting means 18.
Is set by When the user presses the operation member 36 for a short time period setting, the tip of the release portion 40 pushes down the rear end of the seesaw bar 8, so that the tip portion of the seesaw bar 8 is lifted, and the gear 10 is moved along the gear shaft 7 . To disengage the gear 10 from the main gear 16a.
As a result, the rotating body 16 becomes free, and can be rotated clockwise in FIG. 1 by the rotating force in the accumulated state of the driving force generating means 25.

On the other hand, by pressing the operating member 36,
When the cam follower 42 hits the cam slope 43, the cam lever
Over 41 rotates in the counterclockwise direction in FIG. 1, for rotating clockwise the operation projection 44 by the cam lever 41 about the lever shaft 22, the cam sliding portion of the switch lever 21 is separated from the cam groove 20 , The cam 14 is allowed to freely rotate, and the pair of switch bodies 23 and 24 are closed to be set to the ON state.

By the pressing operation of the operation member 36, the engagement piece 39 enters into the rotation locus of the rotating body 16 as shown in FIG. When the rotating body 16 is rotated clockwise by the rotational force of the driving force generating means 25, it is pulled by the coil spring 28, and the rotation angle regulating member 27 is also passively rotated in the same direction as shown in FIG. . Then, the rotation angle regulating member 2
Since the engaging portion 32 of FIG. 7 hits the engaging piece 39 that has entered as shown in FIG. 5C, the rotation angle regulating member 27 stops at that point.

However, the rotating body 16 has two stoppers 2
It further rotates clockwise by the rotation angle α regulated by 9 and 30. When the stopper 30 of the rotating body 16 comes into contact with the engaging portion 32 of the rotation angle regulating member 27, the rotating body 16 stops as shown in FIG. As a result, the rotating body 16 rotates clockwise by the rotation angle of one arrow, and is set to a minimum time limit corresponding to the angle, for example, 1 minute.

When the pressing of the operating member 36 is stopped, the engaging pieces 3
9 comes out of the rotation locus of the rotating body 16. At this time, the seesaw bar 8 returns to the original state by the return of the operation member 36, so that the gear 10 returns to the original position meshing with the main gear 16a. By this engagement state, the rotating body 1
6 is set in a state where it cannot be rotated by the urging force from the driving force generating means 25 due to the urging force.

Thereafter, the rotation angle regulating member 27 is rotated clockwise by the tensile force of the coil spring 28.
When the engaging portion 32 of the rotation angle regulating member 27 comes into contact with the stopper 29 of the rotating body 16, the rotation angle regulating member 27 stops at that point. At this time, the engagement piece 39 is located between the engagement portion 32 and the engagement portion 33 outside the rotation locus of the rotating body 16.

With such an operation, the rotating body 16 and the cam 14 integrated therewith are rotated clockwise by an angle corresponding to one minute, so that the cam sliding contact portion of the switch lever 21 is , The pair of switch bodies 23 and 24 are set to the ON state. Therefore, from this point on, the driving source 9 transmits the rotating body 16 via the gear train 3, the gear 4, the friction gear 5, and the gear 10.
Is rotated counterclockwise together with the cam 14, that is, in the return direction.

When the cam 14 and the rotary body 16 rotate by an angle corresponding to one minute and return to the original position, the cam sliding contact portion of the switch lever 21 falls into the cam groove 20, so that the pair of switch bodies 23 and 24 , Is set to the off state at the time of the drop.

When a short time period is set, the user operates the operating member 36.
When the pressing operation is continuously repeated twice, the rotating body 16
As shown in FIG. 5 (5), when the user rotates clockwise by the rotation angle of the two arrows corresponding to two minutes, and similarly presses three times,
As shown in FIG. 5 (6), the robot rotates clockwise by the rotation angle of three arrows corresponding to three minutes. As a result, a time setting of 1 minute, 2 minutes, or 3 minutes can be set as a time setting of a short time. Even if the operating member 36 is pressed four or more times,
Since the stopper portion 34 of the rotating body 16 does not move by hitting the engagement piece 39, the position is kept at the short time limit setting of 3 minutes,
No further rotation.

Of course, the engaging portion 3 of the rotation angle regulating member 27
By increasing the number of 2, 33, it is possible to set a time limit of 3 minutes or more. In addition, by setting the interval between the engaging portions 32 and 33 different, a special short time limit such as 1.3 minutes can be set. Thus, the rotation angle of the rotating body 16
Are the engaging portions 32 and 33, the stopper 30, and the stopper portion 3.
4 are divided by the relationship with And a short timed
At regular time, the rotating body 16 is positioned at each divided angle
It rotates sequentially in the state.

[0028]

According to the present invention, the rotating body to be divided and positioned is urged to rotate.
When the stop state is released, the rotation member is stopped by the contact relationship between the engagement portion of the rotation angle regulating member and the engagement piece in a state where the rotating body is rotated by a predetermined angle. By performing the predetermined number of operations, the rotating body can be divided and positioned at each predetermined angle, a drive source for the divided positioning is not required, and electrical control for regulating the amount of rotation is unnecessary, and the mechanical structure Split positioning can be performed only by using this method.

[Brief description of the drawings]

FIG. 1 is a plan view of a time switch incorporating a division positioning mechanism of the present invention.

FIG. 2 is a plan view of a cam, a switch lever, and a pair of switch bodies.

FIG. 3 is a cross-sectional view of a friction gear and a seesaw bar.

FIG. 4 is a vertical sectional view of a part of an operation unit, a first time limit setting unit, and a second time limit setting unit.

FIG. 5 is an explanatory diagram of an operation of setting a time limit of a rotation angle regulating unit.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 time switch 2 machine frame 8 seesaw bar 9 drive source 14 cam 15 first time limit setting means 16 rotating body 17 main shaft 18 second time limit setting means 21 switch lever 23 switch body 24 switch body 25 driving force generating means 26 rotation angle Regulating means 27 rotation angle regulating member 28 coil spring 29 stopper 30 stopper 32 engaging part 33 engaging part 35 operating means 36 operating member 39 engaging piece 40 releasing part 41 cam lever 45 stopping means

Claims (1)

(57) [Claims] A rotating body (1) urged in a predetermined rotating direction.
6), the rotating body (16) stops <br/> stop means for holding the detent state (45), is urged to the support by the rotation direction freely predetermined angle to the rotating body (16) rotation angle restriction member (27), a plurality of engaging portions arranged in the circumferential direction of the setting vignetting times <br/> rotation to the rotation angle restriction member (27) and (32, 33),
A predetermined rotation angle with respect to the rotation center of the rotating body (16)
And the engaging portions (32, 33) provided on the rotating body (16).
(30) and stopper portion (34)
And releasing the stopping means (45) to release the rotating body (16).
Release unit to a rotatable state by the urging force (40) and the engagement portion (32, 33) and engaging the engagement piece (39)
DOO operation and a member (36) having, when the operation member (36) is operated, said release portion (4
0) when the rotating body (16) is released and rotated
In both cases, the engaging piece (39) is connected to the engaging portions (32, 3
And enters the rotation locus of 3), and engages with the engaging portions (32, 33).
Is engaged with the engagement piece (39), and the rotating body (16)
The rotating body (16) rotates until the rotation of the rotating body (16) is stopped.
As a result, the rotation angle of the rotating body (16) is
(32, 33), stopper (30) and stopper (3
4), and is divided by the rotation body (16).
Is positioned at each of the divided angles.
A split positioning mechanism for the time switch (1) .