JP2884678B2 - Slice lip control device of paper machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a slice lip control device for a paper machine.

[Prior Art] FIG. 3 shows an example of a head box portion in a paper machine, which has a liquid flow path 3 through which a fiber suspension 2 passes, and is hung on a breast roll 5 from a slice opening 4 at the tip end thereof. There is a head box 1 on which the fiber suspension 2 is supplied on the wire 6 provided, and the slice opening 4 of the head box 1 is vertically adjusted to determine the interval between the slice openings 4. A possible slice lip 7 is provided, and the slice lip 7 is pushed and pulled via an adjusting rod 8 at a plurality of positions having a required interval in the width direction (longitudinal direction) of the slice lip 7. An actuator 9 for adjusting the width of the slice opening 4 in the width direction (profile control) is provided.

In recent years, various types of automatic control of the profile of the slice lip 7 have been performed.

[Problems to be Solved by the Invention] Positioning accuracy is very important for automating the control of the slice lip 7, but in the above-described conventional method, backlash occurs or the actuator 9 stops when it stops. The holding force for holding the state is weak, so that an external force such as vibration causes displacement such as rotation of a motor shaft (not shown) of the actuator 9,
There was a problem that accuracy could not be maintained.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the above-described conventional apparatus, and has as its object to provide a slice lip control apparatus of a paper machine which can control a profile of a slice lip with high accuracy.

[Means for Solving the Problems] In the present invention, a preload nut is attached via a speed reducer to one motor shaft of a drive motor fixed to a frame of a head box, and one end of a slice lip is connected to the preload nut. An electromagnetic brake capable of restraining rotation of the connection shaft to a connection shaft attached to the other motor shaft of the drive motor by screwing the other end of the adjustment rod, and a rotary capable of detecting rotation of the connection shaft Encoder,
And a manual operation handle capable of adjusting the origin of a drive motor via the connecting shaft.

[Operation] When the drive motor is rotated, the rotation is transmitted to the adjustment rod without backlash by the preload nut, so that the profile of the slice lip is accurately controlled. At this time, the rotation of the drive motor is detected by the rotary encoder and feedback control is performed.

After the profile of the slice lip is set, if the rotation of the connecting shaft is restricted by the electromagnetic brake, the profile of the slice lip is prevented from being changed by an external force such as vibration. In addition, since the manual operation handle is provided, the origin of the drive motor can be easily adjusted.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention, in which the same reference numerals as in FIG. 3 denote the same parts.

Adjustment rod 8 for pushing and pulling the slice lip 7
To the frame 10 of the head box 1 at the position where
A drive motor 12 is fixed via a fixed casing 11, and the drive motor 12 is fixed in the fixed casing 11.
A preload nut 15 is connected to one (lower) motor shaft 13 of the 12 via a speed reducer 14. The preload nut 15 is rotatably supported in the fixed casing 11 by a bearing 16.

Further, a screw portion 17 formed at the other end of the adjusting rod 8 having one end connected to the slice lip 7 is attached to the preload nut 15.
Are connected in a state where they are preloaded in the axial direction, thereby preventing the occurrence of backlash.

An electromagnetic brake 21 having a connecting shaft 19 attached to the other (upper) motor shaft 18 of the drive motor 12 and an electromagnet 20 provided around the outer periphery of the connecting shaft 19 to restrict the rotation of the connecting shaft 19. Is fixed to the drive motor 12, a rotary encoder 22 for detecting the rotation 9 of the connection shaft 19 is fixed on the electromagnetic brake 21, and a manual operation handle 23 for adjusting the origin is mounted on the upper end of the connection shaft 19. ing.

In the above configuration, when the drive motor 12 is driven, the preload nut 15 is rotated by the one motor shaft 13 via the speed reducer 14, whereby the adjustment rod 8 is moved in the direction of the arrow to adjust the profile of the slice lip 7. You.

At this time, since the preload nut 15 applies a preload in the axial direction of the adjustment rod 8, the backlash in the axial direction is suppressed, and the rotation of the drive motor 12 causes the adjustment rod 8 to rotate.
Slice lip 7
Is transmitted to

Also, at this time, since the rotation of the drive motor 12 is detected by the rotary encoder 22 via the connection shaft 19, the feedback control can be performed by the detection of the rotary encoder 22 so that the drive motor 12 performs the set rotation. .

Further, after the profile control of the slice lip 7 is performed as described above, the rotation of the connecting shaft 19 is restricted by energizing the electromagnet 20 of the electromagnetic brake 21.

This prevents the drive motor 12 and the preload nut 15 from rotating due to external force such as vibration, thereby enabling highly accurate profile control.

In addition, since the connecting shaft 19 is provided with the manual operation handle 23, the origin of the drive motor 12 can be easily adjusted by manual operation, and therefore, the accuracy control for the adjustment of the slice lip 7 is facilitated.

It should be noted that the slice lip control device of the paper machine of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.

[Effect of the Invention] As described above, according to the slice lip control device of the paper machine of the present invention, one motor shaft of the drive motor is connected to the adjustment rod via the preload nut, so that the backlash Can be prevented, and the connecting shaft attached to the other motor shaft of the drive motor is provided with an electromagnetic brake for restraining the rotation of the connecting shaft, so that the setting is made by rotating the motor shaft by an external force. It is possible to prevent the profile of the slice lip from being changed, and thus it is possible to control the slice lip with high accuracy.

In addition, since the rotation of the drive motor is detected by a rotary encoder and the rotation of the drive motor can be feedback-controlled based on the detected value, and the origin of the drive motor can be adjusted by a manually operated handle, the slice is provided. The accuracy of the lip can be more easily and reliably controlled.

[Brief description of the drawings]

FIG. 1 is a cut-away side view of one embodiment of the present invention, and FIG.
FIG. 3 is a cutaway side view showing a part of a conventional headbox, and FIG. 1 is a head box, 7 is a slice lip, 8 is an adjustment rod, 10 is a frame, 12 is a drive motor, 13 is one motor shaft, 14 is a speed reducer, 15 is a preload nut, 18 is the other motor shaft, 19 is A connecting shaft, 21 is an electromagnetic brake, 22 is a rotary encoder, and 23 is a manually operated handle.

Claims (1)

(57) [Claims] 1. A preload nut is attached to one motor shaft of a drive motor fixed to a frame of a head box via a speed reducer, and the other end of an adjustment rod having one end connected to a slice lip is screwed to the preload nut. Joining and further connecting a coupling shaft attached to the other motor shaft of the drive motor, an electromagnetic brake capable of restraining rotation of the coupling shaft, a rotary encoder capable of detecting rotation of the coupling shaft, and the coupling shaft. A slice lip control device for a paper machine, comprising a manual operation handle capable of adjusting the origin of a drive motor through the device.