JP2001140182A - Orientation-regulating device by head box in paper making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To readily correct the inclination of a fiber orientation angle over the whole width. SOLUTION: A supporting frame 12a is supported by a bearing 24 on a base 13 through a rotary shaft 23 so as to be freely rotatable. A gear 26 connected to a servo motor 27 on the base 13 is made to mate with a ring gear 25 installed in the rotary shaft 23. A head box 1 is mounted on the supporting frame 12a so as to be rotatable. An orientation meter 21 for detecting the fiber orientation angle of a made paper 20, and an arithmetic unit 22 for the rotation of the head box 1 and for sending a control indication to the servo motor 27 based on the signal detected by the orientation meter 21 are installed. The fiber orientation angle of the paper is detected by the orientation meter 21 and, when the profile of the fiber orientation in the width direction is tilted from a target fiber orientation angle over the whole width in the same direction, the head box 1 is rotated by the servo motor 27 and the direction of a slice 4 is changed to shift the direction of the flow of a raw material 8 so as to be even in the width direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper machine head box orientation control apparatus for controlling the fiber orientation of a raw material discharged from a slice of a paper machine head box onto a plow net.

[0002]

2. Description of the Related Art A head box 1 for allowing raw materials to flow out as a uniform thin film-like water flow onto a grate of a paper machine.
5A and 5B, a slice 4 is connected to a front side of a mixing chamber 2 extending in the width direction through a distribution branch pipe 3 as schematically shown in FIG. The main header 5 having a large-diameter end connected to a raw material supply pipe 6 and a small-diameter end connected to a circulation pipe 7 for recirculating a part of the raw material 8 has a large number of coarse branch pipes. 9 and a sub-header 10 is connected to each coarse branch pipe 9 through a supply pipe 11 so as to adjust the basis weight. The raw material 8 installed on the main header 5 and supplied to the main header 5 at a predetermined recirculation ratio is transferred into the mixing chamber 2 through the rough branch pipe 9, and the raw material 8 is made uniform in the mixing chamber 2. Through the distribution branch pipe 3 4 to feed, forming roll 14
The raw material 8 is caused to flow out from the slice 4 as a jet stream onto a plow net (wire) 15 that is run around the wire. Reference numeral 16 denotes a flow control valve for adjusting the recirculation ratio of the raw material 8 of the main header 5.

[0003] Since the fiber orientation of the raw material 8 flowing out from the slice 4 of the head box 1 onto the crossing net 15 has a significant effect on the strength and formation of paper, the fiber When the orientation is partially different in the width direction or is uniformly inclined in the same direction in the width direction, it is necessary to control the fiber orientation so that these are aligned with the target orientation angle. Become.

As a conventional method of controlling the fiber orientation, for example, a large number of slice lips 17 divided in the width direction are provided at the tip of the top slice portion 4a of the slice 4.
By moving each slice lip 17 up and down by each actuator 18 to change the amount of protrusion and thereby change the amount of opening of the lip in the width direction, the flow direction of the raw material 8 flowing out on the plow net 15 Is changed so that the target fiber orientation is obtained. By operating the flow control valve 16 to change the recirculation ratio of the raw material 8 in the main header 5, the outflow from the slice 4 is performed. The orientation is adjusted by changing the flow velocity distribution in the width direction of the raw material 8 to be produced, or the ratio (J) between the speed of the jet stream of the raw material 8 flowing out of the slice 4 and the traveling speed of the plow 15 / W ratio) is adjusted to adjust the orientation on the plow net 15.

[0005]

However, when the width direction profile of the fiber orientation is inclined in the same direction over the entire width direction with respect to the target fiber orientation angle, as described above, this is taken into account. In the case of performing the adjustment for uniformly changing the orientation to the target orientation angle by the above-described method, first, the protrusion amount of the slice lip 17 is adjusted in the width direction to control the fiber orientation. In the case of performing the method by the method, it is necessary to adjust all the slice lips 17 arranged in the width direction, so that a great amount of labor is required, and there is no means for determining the adjustment amount of the slice lip 17, and the target alignment profile There is a problem that the fiber orientation may be controlled by adjusting the recirculation ratio of the raw material 8 in the main header 5. In the case of carrying out the method, there is a problem that it is difficult to change the fiber orientation angle of the raw material 8 flowing out from one end of the slice 4 corresponding to the large-diameter side end of the main header 5. In the case of carrying out the method by controlling the fiber orientation by changing the W ratio, the longitudinal (MD) required for papermaking is used.
rection) and the cross ratio (CD: Cross Machine Direction), which is a problem.
When the ratio is set apart from 1.0, there is a problem that the strength in the lateral direction is reduced, and in either method, the fiber orientation cannot be shifted in the left-right direction over the entire width direction. As described above, when the width direction profile of the fiber orientation is inclined in the same direction over the entire width direction with respect to the target fiber orientation angle, there is a problem that the inclination cannot be eliminated over the entire width. .

Therefore, the present invention can easily adjust the orientation even when the width direction profile of the fiber orientation of the paper is inclined in the same direction over the entire width direction with respect to the target fiber orientation angle. It is an object of the present invention to provide an orientation control device using a paper machine head box that can be controlled.

[0007]

According to the present invention, in order to solve the above-mentioned problems, a head box which allows a raw material to flow out from a tip of a slice onto a plow mesh as a uniform thin film-like water flow is provided on a foundation. A drive device for rotating the head box together with the support gantry is provided so as to be rotatably supported in the horizontal direction via a support gantry on the rotation support device, and further,
An orientation meter for detecting a fiber orientation angle of paper, and a head for inputting a detection signal of the orientation meter and giving a control command to the driving device to change the fiber orientation angle over the entire width so as to obtain a target fiber orientation angle. A configuration including a box rotation arithmetic unit is provided.

When the orientation angle of the fiber of the paper is detected by the orientation meter, a detection signal from the orientation meter is input to the arithmetic unit for rotating the head box, and the control device controls the orientation of the fiber so that the target fiber orientation angle is obtained. A command is given to the drive. As a result, the head box is rotated, and the blowing direction of the raw material from the tip of the slice is uniformly changed in the width direction, and is uniformly controlled so as to have the inclination of the target orientation angle.

A slice lip, which is divided into a large number in the width direction, is attached to the tip of the top slice portion of the slice, and each slice lip can be moved up and down by an operating device to individually change the lip opening. A configuration provided with a lip-opening-adjustment arithmetic unit configured to give a control command to the operating device so that the deviation of the fiber orientation angle in the width direction based on the detection signal of the orientation meter is reduced,
A control command is given to the operating device of the slice lip where the orientation angle should be controlled from the lip opening adjustment arithmetic unit based on the signal from the orientation meter, and the lip opening amount can be partially changed, Even if the fiber orientation is partially different, the width direction profile of the fiber orientation can be controlled to be the same.

[0010] Further, the rotary support device is constituted by a rotary shaft for fixing an upper end to a support base, and a bearing for rotatably supporting a lower end of the rotary shaft, and a ring gear is mounted on an outer peripheral surface of the rotary shaft. In addition, by employing a configuration in which the gears connected to the driving device are meshed with each other to rotate the support gantry on the rotation shaft, the rotation operation of the head box can be easily performed.

Further, the rotation supporting device is constituted by a rotating shaft for fixing the upper end to the supporting frame and a bearing for rotatably supporting the lower end of the rotating shaft. By configuring the support base to rotate above, the operating force required for rotating the head box can be reduced.

[0012] Furthermore, the rotation supporting device is a stepping motor, and the output shaft of the stepping motor is fixed to the lower surface of the support gantry. it can.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1A and 1B show an embodiment of the present invention. A head box 1 having the same structure as the head box 1 shown in FIGS. 13 on a rotary support device 19 installed on
Is installed so as to be rotatable in the horizontal direction via a servomotor 27 as a driving device so that it can be rotated in either the left or right direction, and furthermore, an orientation meter for detecting the fiber orientation angle of the paper 20 made. And a head box rotation arithmetic unit 22 for inputting a detection signal from the orientation meter 21 and giving a control command a to the servomotor 27 so as to rotate the head box 1 so as to set the target orientation angle.
The head box 1 is rotated in a predetermined direction by a command a from the arithmetic unit 22 so that the flow direction of the raw material 8 flowing out of the slice 4 is changed uniformly over the entire width.

The rotation supporting device 19 is shown in FIG.
As shown in (b), as an example, a large-diameter and short rotating shaft 23,
The bearing 24 is mounted on a foundation 13 and includes a bearing 24 that rotatably supports the lower end of the rotating shaft 23 and receives a thrust load.
4, the upper end of the rotating shaft 23 supported by the supporting frame 12 is fixed to the lower surface of the center of the supporting frame 12a, and the supporting frame 12a is supported so as to be able to rotate integrally with the rotating shaft 23 in the horizontal direction. The head box 1 can be rotated by placing the head box 1 on 12a. A ring gear 25 is provided on the outer peripheral surface of the rotating shaft 23.
Is attached, the small-diameter gear 26 attached to the output shaft of the servomotor 27 is meshed, and the servomotor 27 is driven to rotate the gear 26.
5. The support base 12a can be rotated in the horizontal direction via the rotation shaft 23.

The arithmetic unit 22 for rotating the head box
Is input so as to obtain a width direction profile of the fiber orientation of the paper by inputting a detection signal from the orientation meter 21 so that the sum of squares of the difference between the width direction profile and the target fiber orientation angle can be made close to zero. The flow direction of the raw material 8 is calculated, and a control command is sent to the servomotor 27 so that the flow direction of the raw material 8 flowing out of the slice 4 of the head box 1 becomes a direction corresponding to the above calculation result. is there.

Further, a plurality of slice lips 17 divided in the width direction are attached to the tip of the top slice portion 4a of the slice 4, and each slice lip 17 is moved up and down by each operating device 18 to reduce the amount of protrusion. The lip opening amount can be adjusted by changing the lip opening amount. Based on the detection signal of the orientation meter 21, the amount of protrusion of the slice lip 17 is changed to achieve the target fiber orientation angle. Is provided with a lip-opening-adjustment arithmetic unit 28 for individually giving a control command b to the lip-opening, and when the fiber orientation profile is uniformly changed in the width direction by the rotation of the head box 1. When there is a part where the orientation is partially different, the width direction profile of the orientation angle is made closer to flat by lip adjustment.

The head box 1 and the support base 12
If a becomes large and the weight becomes large, and the load acting on the rotating shaft 23 becomes large and it becomes difficult to rotatably support only the bearing 24, for example, the upper surface of the base 13 and the support frame A ladder bearing 29 extending in an arc around the rotation shaft 23 is interposed between the bottom plate 12a and the bottom plate 12a, or a sole plate is laid on the foundation 13 in an arc around the rotation shaft 23, A load applied to the rotating shaft 23 may be dispersed by employing an arbitrary supporting mechanism having a low frictional resistance, such as interposing a liner plate made of a low friction member such as a fluororesin at a contact portion between the upper surface of the plate and the bottom surface of the support base 12a. And stably support the head box 1. In addition, Fig. 5 (a)
The same components as those in (b) are denoted by the same reference numerals.

When the raw material flows out of the slice 4 of the head box 1 onto the plow net 15 in the form of a uniform thin film, the raw material is formed into paper as a product through a downstream pressing section and a drying section. The target fiber orientation angle is
For example, when the fiber orientation angle 30 detected by the orientation meter 21 is tilted to the left over the entire width as shown in FIG. As shown in FIG. 2 (b), a detection signal of the fiber orientation angle 30 is input to the head box rotation operation device 22, and a control command a is sent from the head box rotation operation device 22 to the servomotor 27. When the servo motor 27 is driven and the gear 26 of the output shaft is rotated in the counterclockwise direction, the rotation shaft 2 is rotated via the ring gear 25.
3, the support base 12a is rotated clockwise by a required angle, and the direction of the head box 1 is changed. This causes slice 4 to change its direction diagonally to the right,
The flow direction of the raw material 8 flowing out from the slice 4 onto the plow net 15 is uniformly directed to the right over the entire width, so that the fiber orientation angle 30 in the width direction follows the intended fiber orientation angle. Shifted uniformly to the right.

At this time, if the fiber orientation angle 30 after the shift is partially different in the width direction, a control command b is sent from the lip opening degree adjusting arithmetic unit 28 to each operating unit 18, By adjusting the protrusion amount of the slice lip 17 corresponding to the portion having the different fiber orientation angle, the opening amount of the lip of the portion is changed. Thereby, the outflow amount of the raw material 8 in the width direction is changed, the fiber orientation angle 30 in the width direction is partially controlled, and a uniform orientation angle profile can be obtained.

FIGS. 3A and 3B show another embodiment of the present invention, which shows another structure for rotating the head box 1, which is shown in FIGS. 1A and 1B. In the orientation control device using a paper machine head box having the same configuration as that of the rotation support device 19,
3 and a foundation 1 for rotatably supporting the lower end of the rotating shaft 23
The support gantry 12a is supported by using a rotation support device 31 including the bearing 24 on the top 3, and the support gantry 12a is directly rotated. That is, an actuator 33 such as a hydraulic cylinder as a driving device is interposed between the rear surface of one end of the support base 12 a on the rotation support device 31 and the mounting member 32 on the foundation 13, and the operation rod 34 of the actuator 33 is The front end is connected to the support base 12a.
The head box 1 can be driven to rotate in the horizontal direction integrally with the support gantry 12a by the expansion and contraction operation of the actuator 33 based on the control command a of the head box rotation operation device 22. It is. The same components as those shown in FIGS. 1A and 1B are denoted by the same reference numerals.

According to this embodiment, the same effects as those of the above-described embodiment can be obtained. Further, the rotating shaft 2 serving as a fulcrum is a point of force for changing the angle of the head box 1.
3 and the operating force required for the actuator 33 as a driving device can be reduced.

FIGS. 4 (a) and 4 (b) show still another example of rotating the head box 1 as still another embodiment of the present invention, which is shown in FIGS. 1 (a) and 1 (b). In the orientation control apparatus using a paper machine head box having the same configuration as the above, a rotation support device including a stepping motor 35 as a drive device installed on the foundation 13 is used instead of the rotation support devices 19 and 31. The upper end of the output shaft 36 of the stepping motor 35 is
The angle of the head box 1 can be changed integrally with the support base 12a by the rotation operation of the stepping motor 35 as a configuration attached to the bottom of the central portion of the frame a. In addition, the same components as those shown in FIGS. 1A and 1B are denoted by the same reference numerals.

According to the present embodiment, the same effect as that of the embodiment of FIG. 1 can be obtained. Further, the mechanism for rotating the head box 1 is further simplified, and the number of members is reduced to make the head box 1 more. It can be easy.

The present invention is not limited to the above-described embodiment. In FIGS. 1 (a) and 1 (b), the gear 26 attached to the servomotor 20 is directly meshed with the ring gear 25. However, FIG. 3A shows that a gear box may be interposed between the two.
In (b), the support base 12a is shown as being installed on the foundation 13 via the rotating shaft 23 and the bearing 24. However, if the support base 12a can be rotatably supported, the support base 12a is formed in an arc shape on the base 13. It may be mounted on the arranged rails via wheels, or may be installed via an arc-shaped ladder bearing. In FIGS. 2 (a) and 2 (b), a desired fiber orientation angle is selected. Although shown as a direction along the running direction of the net 10, the direction of the desired fiber orientation angle may be freely determined according to the desired formation and strength of the papermaking,
Each of the embodiments shown in FIGS. 3 (a), (b) and FIGS. 4 (a), (b) employs the ladder bearing 29, the sole plate and the like described in the embodiment of FIGS. 1 (a), (b). Of course, various modifications can be made without departing from the spirit of the present invention.

[0026]

As described above, according to the orientation control apparatus using the paper machine head box of the present invention, the head that allows the raw material to flow out from the tip of the slice onto the plow mesh as a uniform thin film-like water flow. A box is supported on a rotating support device on a foundation via a support frame so as to be rotatable in a horizontal direction, and a drive device for rotating a head box together with the support frame is provided, and further, a fiber orientation angle of paper is detected. And a headbox rotation arithmetic unit for inputting a detection signal of the orientation meter and for giving a control command to the drive unit so as to change the fiber orientation angle over the entire width so as to obtain a target fiber orientation angle. Because it is configured, the fiber orientation angle of the paper to be made is always detected and input to the head box rotation arithmetic unit, and the fiber orientation angle is different from the target fiber orientation angle. In the case where the head box is uniformly inclined in the entire width direction, the angle of the head box is changed by a control command from the head box rotating arithmetic unit so that the flow direction of the raw material flowing out of the slice is changed over the entire width. In this way, the fiber orientation can be easily shifted to the target fiber orientation by uniformly shifting the fiber orientation in the width direction. Attach slice lips which are divided into many directions, and each slice lip can be moved up and down by the actuator so that the lip opening can be changed individually, and the fiber orientation in the width direction based on the detection signal of the orientation meter By providing a lip opening adjustment arithmetic unit configured to give a control command to the operating device so as to reduce the angle deviation, the fiber orientation angle partially varies in the width direction. If the different,
By partially adjusting the lip in accordance with a command from the lip opening adjustment arithmetic unit, it is possible to control the widthwise profile of the fiber orientation angle to be closer to flat by changing the raw material outflow in the width direction, and further, The rotation support device has a configuration in which a rotation shaft that fixes the upper end to the support base and a bearing that rotatably supports the lower end of the rotation shaft, a ring gear is attached to the outer peripheral surface of the rotation shaft, and the drive device By rotating the support base on the rotation shaft by meshing the connected gears, the rotation operation of the head box can be easily performed, and the upper end of the rotation support device is fixed to the support base. And a bearing configured to rotatably support the lower end of the rotating shaft, and to connect the driving device to the supporting frame to rotate the supporting frame on the rotating shaft. Ri, can be the operating force required for the rotation operation of the headbox and small, also,
The rotation supporting device as a stepping motor, the output shaft of the stepping motor is fixed to the lower surface of the support base to reduce the number of members of the rotation supporting device,
It has an excellent effect that it can be made easier.

[Brief description of the drawings]

FIG. 1 shows an embodiment of an orientation control apparatus using a paper machine head box according to the present invention, in which (a) is a schematic side view of a cut, and (b) is a view taken along the line AA of (a). is there.

FIG. 2 shows an overview of the operating state of the device of FIG. 1;
(A) is a plan view showing a state in which the width direction profile of the fiber orientation angle is inclined in the same direction over the entire width with respect to the target fiber orientation angle, and (b) is a method in which the head box is rotated to change the fiber orientation angle. It is a top view showing the state where a width direction profile was made to approach a target.

FIG. 3 shows another embodiment of the present invention.
FIG. 3 is a schematic side view of a main part, and FIG.

FIG. 4 shows still another embodiment of the present invention.
(A) is a schematic side view of a main part, and (B) is a view taken along CC in (A).

FIG. 5 shows an example of a conventional paper machine head box. (A) is a schematic side view of the cut, and (B) is a DD of (A).
It is an arrow view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head box 4 Slice 4a Top slice part 12a Supporting stand 13 Foundation 17 Slice lip 18 Actuator 19 Rotation support device 20 Paper 21 Orientation meter 22 Headbox rotation operation device 23 Rotation shaft 24 Bearing 25 Ring gear 26 Gear 27 Servo motor 28 Calculation device for lip opening adjustment 30 Fiber orientation angle 31 Rotation support device 33 Actuator 34 Operating rod 35 Stepping motor 36 Output shaft a, b Control command

 ────────────────────────────────────────────────── ─── Continued from the front page (72) Inventor Junichi Ito 3-23-22 Toyo, Koto-ku, Tokyo Ishikawajima Industrial Machinery Co., Ltd. F-term (reference) 4L055 CE01 CE90 DA16 DA17 DA20 FA08 FA13

Claims (5)

[Claims] 1. A head box which allows a raw material to flow out from the tip of a slice as a uniform thin film-like water stream onto a plow mesh, can be horizontally rotated via a support base on a rotary support device on a foundation. And a drive device for rotating the head box together with the support base is provided,
An orientation meter for detecting a fiber orientation angle of paper, and a head for inputting a detection signal of the orientation meter and giving a control command to the driving device to change the fiber orientation angle over the entire width so as to obtain a target fiber orientation angle. An orientation control device using a paper machine head box, comprising a configuration provided with a box rotation operation device. 2. A rotary support device comprising: a rotary shaft having an upper end fixed to a support base; and a bearing rotatably supporting a lower end of the rotary shaft. A ring gear is mounted on an outer peripheral surface of the rotary shaft. The gears connected to the driving device are meshed with each other to rotate the support gantry on the rotating shaft.
An orientation control device using the paper machine head box as described in the above. 3. A rotary support device comprising: a rotary shaft having an upper end fixed to a support base; and a bearing rotatably supporting a lower end of the rotary shaft. 2. The orientation control device according to claim 1, wherein the support gantry is rotated. 4. The orientation control device according to claim 1, wherein the rotation support device is a stepping motor, and an output shaft of the stepping motor is fixed to a lower surface of the support base. 5. The tip of a top slice portion of a slice,
Attach the slice lip which is divided into many in the width direction,
Each slice lip can be moved up and down by an actuator so that the lip opening is individually changed, and the above-mentioned actuator is so adjusted as to reduce the deviation of the fiber orientation angle in the width direction based on the detection signal of the orientation meter. 5. The orientation control apparatus according to claim 1, further comprising an arithmetic unit for adjusting a lip opening degree for giving a control command.