JPH06337045A - Phase adjusting device - Google Patents

Abstract

PURPOSE:To eliminate a rotation error caused because of a phase adjusting reduction gear when phase adjustment is not carried out. CONSTITUTION:A phase adjusting device 20 is provided with a phase adjusting motor 6 for carrying out phase adjustment of a roll 3 to a roll 2. An output of the motor 6 is transmitted to a wave motion generator 54 in a phase adjusting decelerating device via the second reduction gear 21. When phase adjustment is not carried out, the wave motion generator 54 rotates at the equal number of revolutions to that of a roll rotary shaft 2a via the second reduction gear 21 by an output of the driving motor 4 of a roll. A rigid internal tooth gear 52 in the phase adjusting reduction gear also rotates at the equal number of revolutions to that of roll rotary shaft 2a. In this way, the phase adjusting reduction gear rotates integrally, in other words, rotates in the mass, so that gearing action does not occur and a rotation error is not generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a phase adjusting device for performing phase adjustment between rotating bodies rotated by the same drive motor.

[0002]

2. Description of the Related Art In a drive system such as a printing roll, there are cases where phase adjustment between two rolls rotated by the same drive motor is required. For this reason, conventionally, the phase adjusting device having the configuration shown in FIG. 2 is used.

The phase adjusting device 1 shown in this figure is for adjusting the phase between the printing rolls 2 and 3, and these rolls 2 and 3 are rotated by the same drive motor 4. The roll 2 is directly driven by the drive motor 4. The side of the roll 3 is driven by the drive motor 4 via a rotational force transmission path composed of a gear train and a phase adjustment speed reducer 5. The phase adjusting speed reducer 5 is driven by a phase adjusting motor 6.

The phase adjusting speed reducer 5 is a differential gear device, and a wave gear type speed reducer is used here. This reduction gear has annular rigid internal gears 51 and 52 arranged in parallel in a coaxial state, an annular flexible external gear 53 arranged inside these, and a wave generator 5 fitted inside this.
It is composed of 4. The wave generator 54 has an elliptical outline shape, and the flexible external gear 53 is bent into an elliptical shape by the wave generator, and the portions at both ends of the long axis of the rigid internal gear 51 are rigid. , 52 are engaged. When the wave generator 54 is rotated, these meshing positions move in the circumferential direction. Here, the number of teeth of the flexible external gear 53 and the number of teeth of the one rigid internal gear 51 are the same, while the number of the other rigid internal gear 52 is two. There are many. Therefore, when the wave generator 54 is rotated to move the meshing position between the flexible external gear 53 and the rigid internal gears 51, 52 in the circumferential direction, the flexible external gear having the same number of teeth is generated. Relative rotation does not occur between 53 and the rigid internal gear 51, but relative rotation occurs in the other rigid internal gear 52. Thus, the high-speed rotation input to the wave generator 54 can be output from the rigid internal gear 51 or 52 after being significantly decelerated. Since the principle of this type of speed reducer is well known, further explanation is omitted here.

In the phase adjusting speed reducer 5 having this structure, the wave generator 54 is driven by the phase adjusting motor 6. Further, a gear 7 is fixed to the outer circumference of the rigid internal gear 51, and the gear 7 is the rotary shaft 2a of the roll 2.
It meshes with the gear 8 attached to the. A gear 9 is also fixed to the outer circumference of the other rigid internal gear 52, and this gear 9 meshes with a gear 11 attached to the rotary shaft 3 a of the roll 3.

In the phase adjusting device 1, during normal operation, the phase adjusting motor 6 is not driven and the brake is applied. In this case, the drive motor 4 drives the roll 2. In addition, from the drive motor 4 to the rotary shaft 2 of the roll 2.
a, gear trains 8, 7, phase adjustment speed reducer 5, gear trains 9, 1
1, the roll 3 is driven via a transmission path extending to the rotating shaft 3a of the roll 3. Next, when it becomes necessary to adjust the phase of the roll 3 with respect to the roll 2, the phase adjusting motor 6 is driven.

As described above, conventionally, a wave gear type speed reducer is used as a phase adjusting speed reducer, and at the time of phase adjustment, the speed reducer is driven to slightly accelerate or decelerate the rotation of the drive motor. By transmitting it to the roll 3 side, the phase between the rolls 2 and 3 is adjusted. Further, when the phase adjustment is unnecessary, the rotational force of the drive motor is directly transmitted to the roll 3 side via the reduction gear.

[0008]

The conventional phase adjusting device having the above structure has the following problems to be solved. When the phase adjustment is unnecessary, the phase adjustment motor is braked to prevent the phase adjustment speed reducer from operating. That is, the wave generator 54 that is a component thereof is fixed. However, this phase adjusting speed reducer is used as a transmission path of the rotational force to the roll 3,
The rigid internal gears 51 and 52, which are the constituent elements, rotate. Therefore, the flexible external gear 53 and the rigid internal gear 5
1 and 52 are in a meshing operation state, and therefore, the rotational output to the roll 3 side via this includes an angle transmission error due to the speed reducer 5, so that a rotation error may occur. is there.

In order to solve this problem, for example, a clutch is inserted between the phase adjusting motor and the wave generator of the phase adjusting speed reducer, and the clutch is disengaged when the phase is not adjusted. Possible configurations. However, when the clutch is arranged, a delay due to the switching control becomes a problem, and for example, a delay in the clutch disengagement control after the phase adjustment may cause a positional deviation between both rolls. is not.

An object of the present invention is to propose a phase adjusting device in which there is no possibility of causing a rotation error due to such a phase adjusting speed reducer when the phase is not adjusted.

[0011]

In order to solve the above-mentioned problems, in the phase adjusting device of the present invention, the meshing operation does not occur in the phase adjusting speed reducer when the phase adjusting is not performed, whereby The angle transmission error of this speed reducer is not output. That is, the phase adjusting device of the present invention intervenes the second speed reducer in the rotational force transmission path from the phase adjusting motor to the phase adjusting speed reducer, so that the drive motor can be stopped when the phase adjusting motor is stopped. Input rotation speed to the high-speed rotation element of the phase adjustment speed reducer transmitted via the second speed reducer and input rotation to one deceleration rotation element of the phase adjustment speed reducer transmitted from the drive motor side. It is characterized in that the numbers are set to be the same. Here, a wave gear device can be used as the reduction gear for phase adjustment.

[0012]

The operation when the wave gear device is used as the phase adjustment speed reducer will be described. When the phase adjustment is not performed, the wave generator of the phase adjustment speed reducer and the rigid internal gear are rotated in the same rotation. Rotate. Therefore, the constituent elements of this phase adjusting speed reducer function integrally as a so-called coupling, and the meshing operation does not occur. Therefore, a rotation error does not occur in the rotation output through the speed reducer.
During the phase adjustment, the wave generator is rotated by the phase adjustment motor via the second speed reducer, so the phase adjustment speed reducer performs speed-up or speed-down operation, and the rotation of the drive motor is increased or decreased through this. Alternatively, it is decelerated and output, and the phase of the rotating body is adjusted by this.

[0013]

EXAMPLE An example of the present invention will be described below with reference to FIG.

The phase adjusting apparatus 20 shown in this figure is obtained by applying the present invention to the conventional apparatus shown in FIG.
Therefore, the same reference numerals are given to the portions corresponding to the respective portions in FIG. 2, and the description of those portions will be omitted.

In the phase adjusting device 20 of this embodiment, a planetary gear reducer 21 is interposed as a second reducer between the phase adjusting motor 6 and the phase adjusting reducer 5. The rotational force of the phase adjusting motor 5 is input to the sun gear 211 of the planetary gear reducer 21. A gear 22 is fixed to the outer circumference of the internal gear 212, and the gear 22 meshes with a gear 23 fixed to the rotating shaft 2a of the roll 2.
Further, the carrier 214 supporting the planetary gear 213 of the planetary gear reducer 21 is connected to the wave generator 54 of the phase adjusting reducer 5.

In this example, the rotational ratio is transmitted as follows by adjusting the speed ratio of the gear trains 22 and 23 and the speed ratio of the planetary gear reducer 21. That is, when the phase adjusting motor 6 is stopped, the rotation speed N1 output from the drive motor 4 to the wave generator 54 side via the gear trains 23 and 22 and the planetary gear reducer 21.
Is set to be equal to the rotation speed N2 of the roll 2. Further, the numbers of teeth of the gears 7 and 8 are set to be the same.

The phase adjusting device 2 of the present example thus configured
At 0, during normal operation (when phase adjustment is not performed)
The roll 2 is driven by the rotational force of the drive motor 4. Further, the rotational force of the drive motor 4 is
a, It is transmitted to the other roll 3 side via the phase adjustment speed reducer 5.

The rotational force of the drive motor 4 is also transmitted to the wave generator 54 of the phase adjusting speed reducer 5 via the gear trains 23 and 22 and the planetary gear speed reducer 21. As described above, the wave generator 54 rotates at the same rotation speed as the roll 2. Also, the rigid internal gear 52 of the phase adjusting speed reducer 5 is
Also rotates through the roll rotation shaft 2a and the gear trains 8 and 7 at the same rotation speed as the roll 2. As a result, the phase adjusting speed reducer 5 rotates in a so-called dango state in which its constituent members are integrated. Therefore, no meshing operation occurs in this speed reducer. Therefore, when the phase adjustment is not performed, the angle transmission error of the speed reducer 5 does not appear, and therefore the error output to the roll 3 does not occur.

During the phase adjustment, the phase adjusting motor 6 is driven. The rotational force from here is input to the wave generator 54 of the phase adjustment speed reducer 5 via the planetary gear speed reducer 6, and the phase adjustment is performed by the speed reducer 5.

Further, in this example, the planetary gear reducer 2 is used.
The angle transmission error occurring at 1 is reduced to one of the speed ratio through the phase adjusting speed reducer 5, so that this error can be made negligible.

In this example, the planetary gear reducer is interposed between the phase adjusting motor and the phase adjusting reducer.
Of course, other types of reducer may be adopted.

[0022]

As described above, in the phase adjusting apparatus of the present invention, the second speed reducer is interposed in the rotational force transmission path from the phase adjusting motor to the phase adjusting speed reducer to adjust the phase. When the motor is stopped, the input rotation speed to the wave generator of the phase adjusting speed reducer transmitted from the drive motor through the second speed reducer and the rigidity of the phase adjusting speed reducer transmitted from the drive motor side. It is set so that the input rotation speed to the internal gear is the same. Therefore, when the phase adjustment is not performed, the meshing operation does not occur in the phase adjustment speed reducer. Therefore, a rotation error does not occur in the rotation output through the speed reducer. Further, the angle transmission error of the second speed reducer is reduced to a negligible degree via the phase adjusting speed reducer, so that there is no adverse effect.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a phase adjusting device to which the present invention is applied.

FIG. 2 is a schematic configuration diagram showing a conventional phase adjustment device.

[Explanation of symbols]

 1, 20 ... Phase adjusting device 2, 3 ... Roll 2a, 3a ... Roll rotating shaft 4 ... Drive motor 5 ... Phase adjusting speed reducer 51, 52 ... Rigid internal gear 53 ... Flexible external gear 54 ... Wave generator 6 ... Phase adjustment motor 7, 8, 9, 11, 22, 23 ... Gear 21 ... Planetary gear reducer (No. 2 speed reducer)

Claims (2)

[Claims] 1. A phase adjustment is performed in a rotational force transmission path from the drive motor to the second rotating body in order to perform a phase adjustment between the first and second rotating bodies that are rotated by the same drive motor. In a phase adjustment device in which a speed reducer is interposed and the phase adjustment speed reducer is driven by a phase adjustment motor during phase adjustment, the phase adjustment speed reducer is a differential gear device, and Rotation from the phase adjusting motor side is input to the high speed rotation element of the gear device, and rotation from the drive motor side is input to one of the deceleration rotation elements of the differential gear device and the other side thereof is input. Is connected to the side of the second rotating body, and a second speed reducer is interposed in a rotational force transmission path from the phase adjusting motor to the phase adjusting speed reducer to provide the phase adjusting motor. When stopping, drive the Input speed to the high speed rotation element of the phase adjusting speed reducer transmitted from the motor through the second speed reducer, and decelerated rotation of the phase adjusting speed reducer transmitted from the drive motor side. A phase adjusting device, characterized in that it is set so as to have the same input rotational speed to the element. 2. A phase adjustment is performed in a rotational force transmission path from the drive motor to the second rotating body in order to perform a phase adjustment between the first and second rotating bodies rotated by the same drive motor. In a phase adjusting device in which a speed reducer is interposed and the phase adjusting speed reducer is driven by a phase adjusting motor at the time of phase adjustment, the phase adjusting speed reducer is arranged in parallel in a coaxial manner. And a second rigid internal gear, a flexible external gear arranged inside thereof, and a second external internal gear fitted into the external gear to flex the external gear in the radial direction, and While partially meshing with the first and second rigid internal gears,
A wave generator that moves these meshing positions in the circumferential direction is provided. Rotation is input to the wave generator from the phase adjusting motor side, and the first and second rigid internal gears are rotated. Rotation is transmitted from one side of the drive motor to one side, and the other side is connected to the side of the second rotating body, and a rotational force transmission path from the phase adjusting motor to the phase adjusting speed reducer. A second speed reducer is interposed between the phase adjuster motor and the wave generator of the phase adjuster, which is transmitted from the drive motor through the second speed reducer when the phase adjuster motor is stopped. A phase adjusting device, wherein the number of rotations and the input number of rotations input to the rigid internal gear of the phase adjusting speed reducer transmitted from the drive motor side are set to be the same.