JPH07234191A - Line sensor retraction device - Google Patents

Abstract

PURPOSE:To maintain the same inspection conditions before and after the retraction operation from a monitoring line for achieving an accurate surface monitoring by transferring the rotation of a drive wheel to a sensor unit via a compression spring and at the same time preventing the rotation of the sensor unit by a stopper at a set position. CONSTITUTION:A pin 9 protruding on the side surface of a drive wheel 7 of a drive case is inserted into a cut-out part 15 of a press plate 13 and a compression spring 8 is inserted at an area to a pin 13a planted at the press plate 13. The rotation of the drive wheel 7 is transferred to the press wheel 13 which is in one piece with a support bracket 11 via the spring 8 and rotates the bracket 11 (namely sensor unit) relatively for the drive wheel 7 within the range of elastic deformation of the spring 8. Also, a stopper 10 of a rotary wheel 12 which is in one piece with the bracket 11 is inserted into a circular groove 17 formed at a fixed wheel 14, the rotation range of the rotary wheel 12 for the fixed wheel 14 is regulated to the range of the groove 17, and the sensor unit is set to the set position and the retraction position, thus maintaining the same inspection conditions before and after the retraction operation from the monitoring line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is directed to surface monitoring devices (eg,
In the printing surface monitoring device in the online print quality control system of the continuous paper printing device, the line sensor that is arranged to face the monitoring line is set to face the surface of the monitoring line and the retreat position that is separated from the surface of the monitoring line. The present invention relates to a line sensor retractor for moving to and.

[0002]

2. Description of the Related Art As a line sensor retracting device of this type, a manual device for manually moving it to a set position and a retracted position, and a device for driving a cylinder by an air cylinder or an oil cylinder are known.

[0003]

The former manual method described above has a problem that the set reproducibility to the original set position is poor. The latter drive system requires an air source or an oil source, and has a problem that ancillary equipment is complicated.

[0004]

[Means for Solving the Problems] A sensor unit is rotatably supported around a horizontal support shaft, and a motor-driven drive wheel loosely fitted to the horizontal support shaft is transmitted to the sensor unit via an elastic body. A stopper is provided to prevent rotation of the sensor unit at the set position.

[0005]

EXAMPLES The present invention will be described in detail below based on examples. Referring to FIGS. 1 to 3, a horizontal support shaft 1 located above the monitoring line A and fixed to an appropriate supporting member.
Then, the pair of support brackets 11 are loosely fitted, the sensor unit 2 is fixed to the support brackets 11, and the sensor unit 2 is rotatably supported by the horizontal support shaft 1 about the horizontal support shaft 1. The rotating wheel 12 is provided to the side of the one support bracket 11, and the pressure wheel 13 is provided to the side of the other support bracket 11.
Are connected in series, a fixed wheel 14 fixed to the horizontal support shaft 1 is provided on the side of the rotary wheel 12, and is supported by a drive unit 3 fixed to the horizontal support shaft 1 on the side of the pressure wheel 13. Drive wheel 7
And the support bracket 11 integrated with the sensor unit 2 is attached to the horizontal support shaft 1 by the fixed wheel 14 and the drive wheel 7.
Is locked in the axial direction of the horizontal support shaft 1 to be in a fixed position in the axial direction of the horizontal support shaft 1.

The drive unit 3 is equipped with a reduction gear 5 and an electric motor 6 on a drive case 4 fixed to a horizontal support shaft 1, and a drive wheel (drive gear) 7 is loosely fitted on the horizontal support shaft 1 to The drive gear 7 is transmitted to the output shaft of the speed reducer 5 to drive the drive gear 7
To drive the motor. Referring to FIG. 7, the drive wheel 7 of the drive case 4 and the pressure plate 13 integral with the support bracket 11 are transmitted via an elastic body (compression spring) 8. In the embodiment, an arcuate cutout 15 is formed on the pressure plate 13 so as to face the drive wheel 7, and the pin 9 projecting from the side surface of the drive wheel 7 is positioned inside the cutout 15 of the pressure plate 13 to form a cutout. The elastic body (compression spring) 8 is inserted into the notch 15 located between the pin 14 located on the pressure plate 13 and located on the pressure plate 13 and the pin 9 of the drive wheel 7 to compress the elastic body (compression). The support bracket 11 (that is, the sensor unit 2) is rotatable relative to the drive wheel 7 within the range of elastic deformation of the spring 8. Further, it is a limit switch 16 for stopping the electric motor 6 in order to regulate the rotation range when the drive wheel 7 rotates forward and backward.

Next, a stopper structure for blocking the rotation of the sensor unit at the set position will be described. With reference to FIG. 9, a stopper 10 is projected from a rotating wheel 12 integrated with a support bracket 11 toward a fixed wheel 14, and the fixed wheel 14 has an arc groove 1 on a surface facing the stopper 10.
7 is formed and the stopper 10 is positioned in the circular arc groove 17, so that the stopper 10 can be freely moved within the circular arc groove 17, and the rotational range of the rotary wheel 12 with respect to the fixed wheel 14 (that is, the sensor unit 2 The rotation range with respect to the horizontal support shaft 1) is restricted, and the set position and the retracted position are set according to the positional relationship between the circular arc groove 17 and the stopper 10. In addition, a lock mechanism for fixing the set position and the retracted position (for example, a lock pin and a lock hole that can lock the rotating wheel 12 and the fixed wheel 14 are provided, and the lock pin is elastically inserted into the lock hole in the spring body. By providing a structure in which the lock pin is unlocked and the lock pin is released from the lock hole against the elastic force of the spring body), the electric motor 6 is fixed at the set position or the retracted position even after the electric motor 6 is stopped. be able to.

Referring to FIGS. 5 and 6, the sensor unit 2 includes a light source (cold cathode discharge tube) 21, a film mirror 26, an optical fiber 22, condenser lenses 23 and 23, a light receiving substrate 24, and a unit case 20. Sensor board 25
The interior is constructed. The sensor unit 2 is maintained in a set position which is close to and faces the monitoring line A shown in FIG. 3, but when it is necessary to move to the retracted position shown in FIG. The drive gear 6 is rotated in the direction (b) of FIG. 7 by the motor drive by the reverse rotation of the motor, and the pin 9 in the notch 15 of the pressure plate 13 is used to press the pressure plate 1.
3 moves in the B direction, and the sensor unit 2 rotates in the B direction until the electric motor 6 is stopped by the operation of the limit switch 16 and moves to a predetermined retracted position when the electric motor 6 is stopped (FIGS. 5 and 5). 7b)). When returning from the retracted position to the set position, the electric motor 5 is rotated in the forward direction to rotate the drive gear 6 in the direction (b in FIG. 7), and the pressure plate 1 is rotated.
The pin 9 in the notch 15 of 3 is rotated in the a direction. The pin 9 rotates in the A direction to compress the elastic body 8 (see a in FIG. 8). When the pin 9 further rotates in the a direction, the elastic body 8 is compressed and at the same time, the pin 13a of the pressure plate 13 is moved in the a direction (b in FIG. 8). At this time, the stopper 10 is in the arcuate groove 17 and the rotating wheel 12 can freely rotate with respect to the fixed wheel 14 (that is, the stopper 10 is in the non-operating state).
(See FIG. 10a).

Further, when the electric motor 6 rotates in the normal direction, the pressure plate 13 can freely rotate in the direction of a within the range of elastic deformation of the elastic body (compression spring) 8 (b in FIG. 7), but the sensor unit 2 does not. By the timing which is rotated in the direction a and rotated to a predetermined set position (see FIG. 4), the stopper 10 is in an operating state (see FIG. 10b), and the rotation of the rotating wheel 12 is blocked by the stopper 10 so that The sensor unit 2 is fixed in the rotating direction at the set position of. After that, the electric motor 6 is stopped by the operation of the limit switch 16. When a lock mechanism for fixing the set position and the retracted position is provided, the lock mechanism is released and the electric motor 6 is started when moving to the retracted position and returning from the retracted position to the set position. It is a thing. Also, the sensor unit 2
Is fixed to the set position or the retracted position even after the electric motor 6 is stopped.

[0010]

According to the present invention, since the drive wheel of the motor drive is transmitted to the rotation of the sensor unit via the compression spring and the stopper for preventing the rotation of the sensor unit at the set position is provided, the same set is always set. The position can be maintained and set reproducibility of the set position can be secured,
It is possible to maintain the same inspection condition before and after the retracting operation from the monitoring line of the sensor unit to perform accurate surface monitoring. In addition, there is no risk of the sensor unit being twisted left and right, and auxiliary equipment such as an air source and an oil source is unnecessary, and the structure is simple and maintenance is easy.

[Brief description of drawings]

FIG. 1 is a front view of a line sensor retractor showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the same set position.

FIG. 4 is a side view also showing the retracted position.

FIG. 5 is a front view of the sensor unit.

FIG. 6 is a vertical sectional view of the same.

7A and 7B show a transmission mechanism of a drive wheel and a pressure wheel, wherein FIG. 7A is a front view of the pressure wheel, and FIG. 7B is a sectional view taken along the line S-S in FIG.

FIG. 8 is an explanatory diagram showing a transmission state between a drive wheel and a pressure wheel.

9A and 9B show a stopper mechanism, FIG. 9A is a partially sectional front view, and FIG. 9B is an explanatory view showing a circular arc groove of a fixed wheel and a stopper.

FIG. 10 is an explanatory view showing a position change of a stopper with respect to an arc groove.

[Explanation of symbols]

1 horizontal spindle 2 sensor unit 3 drive unit 6 electric motor 7 drive wheel (drive gear) 8 elastic body (compression spring) 10 stopper 13 pressure wheel

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[Procedure amendment]

[Submission date] April 7, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Column for detailed explanation of the invention

[Correction method] Change

[Correction content]

Detailed Description of the Invention

[001]

BACKGROUND OF THE INVENTION The present invention is directed to surface monitoring devices (eg,
In the printing surface monitoring device in the online print quality control system of the continuous paper printing device, the line sensor that is arranged to face the monitoring line is set to face the surface of the monitoring line and the retreat position that is separated from the surface of the monitoring line. The present invention relates to a line sensor retractor for moving to and.

[002]

2. Description of the Related Art As a line sensor retracting device of this type, a manual device for manually moving it to a set position and a retracted position, and a device for driving a cylinder by an air cylinder or an oil cylinder are known.

[003]

The former manual method described above has a problem that the set reproducibility to the original set position is poor. The latter drive system requires an air source or an oil source, and has a problem that ancillary equipment is complicated.

[004]

[Means for Solving the Problems] A sensor unit is rotatably supported around a horizontal support shaft, and a motor-driven drive wheel loosely fitted to the horizontal support shaft is transmitted to the sensor unit via an elastic body. A stopper is provided to prevent rotation of the sensor unit at the set position.

[0095]

EXAMPLES The present invention will be described in detail below based on examples. Referring to FIGS. 1 to 3, a horizontal support shaft 1 located above the monitoring line A and fixed to an appropriate supporting member.
Then, the pair of support brackets 11 are loosely fitted, the sensor unit 2 is fixed to the support brackets 11, and the sensor unit 2 is rotatably supported by the horizontal support shaft 1 about the horizontal support shaft 1. The rotating wheel 12 is provided to the side of the one support bracket 11, and the pressure wheel 13 is provided to the side of the other support bracket 11.
Are connected in series, a fixed wheel 14 fixed to the horizontal support shaft 1 is provided on the side of the rotary wheel 12, and is supported by a drive unit 3 fixed to the horizontal support shaft 1 on the side of the pressure wheel 13. Drive wheel 7
And the support bracket 11 integrated with the sensor unit 2 is attached to the horizontal support shaft 1 by the fixed wheel 14 and the drive wheel 7.
Is locked in the axial direction of the horizontal support shaft 1 to be in a fixed position in the axial direction of the horizontal support shaft 1.

The drive unit 3 comprises a drive case 4 fixed to the horizontal support shaft 1, a reduction gear 5 and an electric motor 6, and
A drive wheel (drive gear) 7 is loosely fitted to the horizontal support shaft 1 and the drive gear 7 is transmitted to the output shaft of the speed reducer 5 to drive the drive gear 7 by a motor. Referring to FIG. 7, the drive wheel 7 of the drive case 4 and the pressure plate 13 integral with the support bracket 11 are transmitted via an elastic body (compression spring) 8. In the embodiment, an arcuate cutout 15 is formed on the pressure plate 13 so as to face the drive wheel 7, and the pin 9 projecting from the side surface of the drive wheel 7 is positioned inside the cutout 15 of the pressure plate 13 to form a cutout. Part 1
5, the elastic body (compression spring) 8 is inserted into the cutout portion 15 between the pin 13a which is set up on the pressure plate 13 and the pin 9 of the drive wheel 7, and the elastic body (compression spring) is inserted. ) 8, the support bracket 11 (that is, the sensor unit 2) is rotatable relative to the drive wheel 7.
Further, it is a limit switch 16 for stopping the electric motor 6 in order to regulate the rotation range when the drive wheel 7 rotates forward and backward.

Next, a stopper structure for blocking the rotation of the sensor unit at the set position will be described.
Referring to FIG. 9, the rotating wheel 1 integrated with the support bracket 11
The stopper 10 is projected from 2 toward the fixed ring 14,
By forming the circular arc groove 17 on the surface of the fixed ring 14 facing the stopper 10 and positioning the stopper 10 in the circular arc groove 17, the stopper 10 is freely movable within the range of the circular arc groove 17 and is rotated with respect to the fixed ring 14. The rotation range of the driving wheel 12 (that is, the rotation range of the sensor unit 2 with respect to the horizontal support shaft 1) is restricted, and the set position and the retracted position are set according to the positional relationship between the circular arc groove 17 and the stopper 10. In addition, a lock mechanism for fixing the set position and the retracted position (for example,
A lock pin and a lock hole for locking the rotating wheel 12 and the fixed wheel 14 are provided, and the lock pin is locked by elastically inserting the lock pin into the lock hole to lock the lock pin against the elastic force of the spring body. By providing a structure for releasing the lock by detaching from the hole, the electric motor 6 can be fixed at the set position or the retracted position even after the electric motor 6 is stopped.

5 and 6, the sensor unit 2 includes a light source (cold cathode discharge tube) in the unit case 20.
21, the film mirror 26, the optical fiber 22, the condenser lenses 23 and 23, the light receiving substrate 24, and the sensor substrate 25 are built in. The sensor unit 2 is maintained in a set position which is close to and faces the monitoring line A shown in FIG. 3, but when it is necessary to move to the retracted position shown in FIG. The drive gear 6 is rotated in the B direction (FIG. 7B) by the motor drive by the reverse rotation of the motor, and the pin 9 in the notch portion 15 of the pressure plate 13 is used to press the pressure plate 13.
Moves in the B direction, and the sensor unit 2 rotates in the B direction until the electric motor 6 is stopped by the operation of the limit switch 16 and moves to a predetermined retracted position when the electric motor 6 is stopped (FIGS. 5 and 7). B)). When returning from the retracted position to the set position, the electric motor 5 is normally rotated to rotate the drive gear 6 in the direction a (b in FIG. 7), and the pressure plate 13 is rotated.
The pin 9 in the notch 15 is rotated in the direction a. Pin 9
Rotates in the direction a to compress the elastic body 8 (see a in FIG. 8). When the pin 9 further rotates in the a direction, the elastic body 8 is compressed and at the same time, the pin 13a of the pressure plate 13 is moved in the a direction (b in FIG. 8). At this time, the stopper 10 is in the arcuate groove 17 and the rotating wheel 12 can freely rotate with respect to the fixed wheel 14 (that is, the stopper 10 is in the non-operating state).
(See FIG. 10a).

Further, when the electric motor 6 rotates in the normal direction, the pressure plate 13 can freely rotate in the direction of (a) in the range of elastic deformation of the elastic body (compression spring) 8 (b in FIG. 7), but the sensor unit 2 does not. By the timing which is rotated in the direction b to a predetermined set position (see FIG. 4), the stopper 10 is in an operating state (see b in FIG. 10), and the rotation of the rotating wheel 12 is performed by the stopper 1.
It is blocked by 0, and the sensor unit 2
Is fixed in the rotational direction. After that, the electric motor 6 is stopped by the operation of the limit switch 16. When a lock mechanism for fixing the set position and the retracted position is provided, the electric motor 6 is released after the lock mechanism is released when moving to the retracted position and returning from the retracted position to the set position.
Is to start. Also, the sensor unit 2
Even after the electric motor 6 is stopped, it is fixed to the set position or the retracted position.

Claims (1)

[Claims] 1. A sensor unit is rotatably supported around a horizontal support shaft, and a drive wheel loosely fitted to the horizontal support shaft is rotatable by a motor drive, and a driven wheel integral with the sensor unit is driven. It is characterized in that it is transmitted through a ring and an elastic body, and a stopper is provided to prevent rotation of the sensor unit at the set position, and the sensor unit is maintained in the set position regulated by the stopper when the elastic body is biased. And a line sensor retractor.