JP6990400B2 - Strip cutting device - Google Patents

Description

The present invention relates to a strip-shaped material cutting apparatus, and relates to a technique for cutting strip-shaped paper in a paper making machine such as a recycled paper recycling apparatus for recycling recycled paper.

Conventionally, there is a technique of this kind described in Patent Document 1, for example. This is a cutting device for a recycled paper recycling apparatus, and cuts a strip of paper that has been made into recycled paper of a predetermined size. The strip of paper is conveyed along the longitudinal direction by the conveying portion, and is cut in a direction intersecting the conveying direction by a cutter. The transport unit includes a transport roller provided on the upstream side of the cutter in the transport direction of the strip, and a presser roller arranged opposite to the transport roller and sandwiching the strip between the transport rollers. Then, the presser roller is raised by the skew correction means to release the strip from the pinched state to the unrestrained state, and the traveling direction of the slanted strip under the pinched state is corrected.

Patent No. 5906547

In the recycled paper recycling apparatus described in Patent Document 1, when the strip is cut by the cutter, the strip is sandwiched between the rollers at the front and rear positions of the cutter to stop the transport of the strip. During this period, the subsequent strips of paper are being conveyed, and the strips are bent on the upstream side of the transport roller and the presser roller, the tension of the strips is loosened, and wrinkles are generated.

For this reason, after cutting with a cutter, the subsequent bent strips are quickly transported by the transport roller and the presser roller to eliminate the slack in the tension of the strips. In addition, the single leafy vegetables after cutting are also discharged at a speed higher than the normal transport speed.

The recycled paper recycling equipment contains a plurality of processing parts such as a head box, a wire part, a dehydrating part, a dryer part, a finishing part, etc., which are responsible for each process of papermaking, inside the casing, and the transport speed of strips in each process is high. It is basically the same in normal times.

To reduce the thickness of the strip paper, for example, adjust the paper thickness by increasing the transport speed of the wire part without changing the supply amount of pulp suspension poured from the headbox per unit time. There is. In this case, the transport speed passing through the dryer section is naturally increased, but this is dealt with by adjusting the heating temperature according to the heating load.

As a result, the thinner the thickness of the strip paper, the faster the normal transport speed, and the higher the transport speed, the greater the deflection of the strip paper that occurs during cutting. Therefore, in order to eliminate the deflection of the subsequent strips after cutting, it is necessary to increase the speed at which the strips are conveyed by the conveying roller and the presser roller. However, if this speed is too high, the subsequent strips may collide with the sheet-fed material that precedes the transport path on the downstream side of the cutter.

When the recycled paper recycling apparatus is miniaturized, the structures are such that the processing units are close to each other. For this reason, the space for bending the strip paper in the transport path on the upstream side of the cutter is also narrowed. For this reason, the strip-shaped paper forms a loop and bends highly, which is a problem in eliminating the deflection of the strip-shaped paper.

When the loop is low, when the pinched state between the transport roller and the presser roller is released to the unrestrained state, the strip-shaped paper cancels the loop by the elastic force and restores the straight posture, and follows the transport path. Elongate. However, if the loop becomes too high, the force for restoring the straight posture weakens, and it becomes difficult to eliminate the loop in the unrestrained state.

The present invention solves the above-mentioned problems, and provides a strip cutting device capable of preventing a subsequent strip from colliding with a strip after cutting even if the transport speed of the strip is increased. With the goal.

The strip-shaped object cutting device of the present invention is provided with an upstream transport section, a cutting transport section, a cutting device, and a downstream transport section arranged on a strip-shaped object transport path, and also includes a control unit for normal control and cutting control of each section. The transport unit always transports the strip-shaped object to the cutting transport unit at a set speed in both normal control and cutting control, and the cutting transport unit transfers the strip-shaped object at a speed substantially equal to the set speed in normal control through the cutting device. It is transported to the downstream transport section, the transport of the strip-shaped object is stopped while the strip-shaped object is sandwiched in the cutting control, the strip-shaped object transported from the upstream transport section is retained in a loop on the transport path, and the strip-shaped object is transported after cutting control. At the initial stage of resumption or during transportation, the pinched state with respect to the strip is released, and the downstream transport section transports the strip at a speed almost equal to the set speed in normal control, stops together with the transport section for cutting in cutting control, and the strip. After cutting, the sheet-fed material after cutting is transported to the downstream side at a discharge speed faster than the set speed, and the control unit sets the stop time of the cutting transport unit in the cutting control based on the increase / decrease in the set speed of the upstream transport unit. It is characterized by adjusting.

In the strip-shaped object cutting device of the present invention, the control unit conveys the strip-shaped object at a retention elimination speed faster than the set speed at the initial stage of transfer restart after cutting control in the cutting transfer section, and sets the retention elimination rate of the upstream transfer section. It is characterized by adjusting the increase / decrease according to the increase / decrease of the set speed.

In the strip-shaped object cutting device of the present invention, the cutting transport section has a pair of transport rollers facing each other via the strip-shaped object, and stops in a state where the strip-shaped object is sandwiched between both transport rollers in cutting control, and is usually used. In the control, the band-shaped object is transported in a state of being sandwiched between the two transport rollers, and the sandwiched state with respect to the band-shaped object is released by temporarily opening the band-shaped object at the initial stage of resuming the transfer after the cutting control or during the transfer. It is a feature.

In the strip-shaped object cutting device of the present invention, the cutting transport section includes a loop accommodating space section on the upstream side of the pair of transport rollers, in which the strip-shaped objects transported from the upstream transport section are retained in a loop shape on the transport path. It is characterized by being provided with a pushing-down portion that presses a loop-shaped strip-shaped object in the accommodating space toward a transport path.

As described above, according to the present invention, the cutting and transporting unit releases the pinched state with respect to the strip-shaped object at the initial stage of resuming transport after cutting control, or during transport, so that the strip-shaped object stays in a loop on the transport path on the upstream side. The object extends downstream through the cutting and transporting section.

The control unit adjusts the stop time of the cutting transport unit in the cutting control based on the increase or decrease in the set speed of the upstream transport unit, so that the single leafy vegetables after cutting are cut to a position that does not hinder the subsequent transport of the strip-shaped material. It is possible to secure the time required for transporting, and it is possible to properly transport and cut the strip-shaped material regardless of the increase in the set speed of the upstream transporting portion.

In addition, by adjusting the retention elimination speed based on the increase or decrease in the set speed of the upstream transport section, the deflection of the band-shaped object that stays in a loop on the transport path on the upstream side is large due to the increase in the set speed of the upstream transport section. Even so, the large deflection of the band-shaped object can be quickly eliminated.

The cutting transport unit provides a push-down portion that pushes the loop-shaped strip toward the transport path in the loop accommodating space for retaining the strip-shaped object in a loop shape, so that the force applied by the push-down portion can be applied. It contributes to the elimination of the loop, and even if the loop of the band-shaped object becomes high, the band-shaped object can be quickly extended on the transport path.

Since the control unit has an input unit for changing and setting the time for passing through the heating unit of the strip-shaped object, the heating degree intended by the user can be appropriately adjusted, and the convenience is improved.

Schematic diagram which shows the used paper recycling processing apparatus in embodiment of this invention Flow chart diagram showing normal control and disconnection control in the same embodiment Flow chart showing heating time control in the same embodiment

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the used paper processing device 1, which is a kind of paper making machine, has a paper making device 2 that performs a paper making process for making a strip-shaped wet paper 100 and a drying device that performs a drying step for drying a strip-shaped wet paper 100. 4. It is provided with a white water storage unit 5 having an open top for storing the filtered water discharged from the papermaking process, and a control device (not shown) for controlling each unit.

Some of the used paper processing apparatus 1 is provided with a dehydration step between the paper making step and the drying step, and the dehydration step includes a dehydration belt made of felt. Further, in the present embodiment, the strips of the wet paper 100 and the dry paper 101 obtained by making a pulp suspension will be described as examples of the strips, but as the strips, an adhesive is added to the fibers. The long object formed in the shape of a strip is also a strip in the present invention.

The papermaking device 2 includes a papermaking unit 20 and a wet paper dispersion unit 6. The papermaking unit 20 has a papermaking wire 22 spanned between the rollers 21 of the first group and a head box 23 for supplying the pulp suspension to the papermaking wire 22. The papermaking wire 22 rotates in an endless orbital manner and travels over the wet paper forming transfer path 22a and the return path 22b, and the wet paper 100 is made on the wet paper forming surface of the papermaking wire 22 in the wet paper forming transfer path 22a. Then, the formed wet paper 100 is transferred to the drying device 4 in the next step on the terminal side of the wet paper forming transfer path 22a. The papermaking wire 22 is made of metal or synthetic resin, has a mesh shape, and has water permeability and breathability.

The wet paper dispersion portion 6 of the papermaking apparatus 2 is detachably provided with respect to the apparatus main body in the middle of the path in which the filtered water falls from the papermaking wire 22 to the white water storage portion 5. The wet paper dispersion unit 6 receives the wet paper 100 falling from the wet paper forming surface of the papermaking wire 22 in the return path 22b. In the present embodiment, the wet paper dispersion unit 6 has a dispersion plate 61 that receives the wet paper 100 falling from the papermaking wire 22.

Further, a cleaning nozzle 24 as a cleaning means is provided inside the endless track of the papermaking wire 22, and the cleaning nozzle 24 faces the back surface opposite to the wet paper forming surface of the papermaking wire 22 running on the return path 22b. And release the cleaning liquid.

The papermaking device 2 has a squeezing and dehydrating unit 25. The squeezing / dehydrating unit 25 has a pair of squeezing / dehydrating rollers 25a and 25b that sandwich the papermaking wire 22 and the wet paper 100. The squeezing and dehydrating rollers 25a and 25b press the wet paper 100 against the papermaking wire 22 to squeeze and dehydrate the wet paper 100.

Then, the drying device 4 is arranged as the next step of the paper making device 2. The drying device 4 has a drying roller 41 having a built-in heating device such as a heater to form a heating unit, and a canvas belt 415 spanned between the drying roller 41 and a plurality of rollers 412. Further, a scraper portion 400 for peeling the strip-shaped dry paper 101 from the drying roller 41 is arranged in sliding contact with the drying roller 41.

A wet paper transition portion 301 is formed between the paper making portion 20 and the drying device 4. The wet paper transition portion 301 is formed between the specific roller 21a in the rollers 21 of the first group of the papermaking portion 20 and the specific roller 412a in the plurality of rollers 412 of the drying device 4.

On the transport path of the dry paper 101 on the downstream side in the transport direction from the scraper section 400, the upstream transport section 510, the cutting transport section 520, the cutting device 530, and the downstream transport section 540 are sequentially arranged from the upstream side to the downstream side. There is.

The upstream transport unit 510 has a first transport roller pair 511 and 511, and here, the drying device 4 and the papermaking device 2 also constitute the upstream transport unit 510.

As described above, in the present embodiment, the strip is a strip obtained by making a pulp suspension, but a long strip formed by adding an adhesive to fibers is treated as a strip. In this case, the upstream transport unit is composed of a transport belt, a pressing roller, a heating roller, and the like. That is, fibers mixed with an additive such as an adhesive are deposited on a transport belt to form a strip, the strip is conveyed while being pressed by a pressing roller, and the strip is conveyed while being heated by a heating roller.

Next, the first transport roller pairs 511 and 511 face each other up and down via the dry paper 101, and the dry paper 101 is always transferred to the downstream cutting transport unit 520 at a set speed in both the normal control and the cutting control described later. Transport. Normal control and disconnection control will be described in detail later.

The cutting transport unit 520 has a second transport roller pair 521a and 521b, and the upper non-drive side transport roller 521a is provided so as to be movable up and down with respect to the lower drive side transport roller 521b. There is.

Further, a loop accommodating space portion 522 is provided on the transport path between the second transport roller pair 521a and 521b and the first transport roller pair 511 and 511. The loop accommodating space 522 is a space for the dry paper 101 to bend in a loop shape during cutting control. A push-down portion 523 is provided at the upper position of the loop accommodating space portion 522. The push-down portion 523 is curved upward in a convex shape, and is provided so as to swing up and down around the axis of the support shaft 523a at the lower end.

The push-down portion 523 is lifted by the wet paper 101 that stays in the loop accommodating space portion 522 in a loop shape during cutting control, and swings upward. Then, when the second transport roller pair 521a and 521b are released from the state of sandwiching the dry paper 101, the pushing-down portion 523 applies a downward force to the loop due to its own weight.

On the downstream side of the second transport roller pair 521a and 521b in the transport direction, the cutter blade pairs 531 and 513 of the cutting device 530 are arranged to face each other via the transport path of the dry paper 101.

The downstream transport unit 540 has the third transport roller pairs 541 and 541 at positions separated from the cutter blade pairs 531 and 513 by a necessary and sufficient distance, and further has the fourth transport roller pairs 542 and 542 on the downstream side in the transport direction. The third transport roller pair 541, 541 and the fourth transport roller pair 542, 542 are vertically opposed to each other via the dry paper 101.

Hereinafter, the operation related to the above configuration will be described.
(Papermaking process)
In the papermaking section 20, the pulp suspension is supplied from the head box 23 to the papermaking wire 22, and the wet paper 100 is made on the wet paper forming surface of the papermaking wire 22. The wet paper 100 is transferred from the papermaking unit 20 to the drying device 4 at the wet paper transition unit 301.

In the wet paper transition portion 301, the wet paper 100 made on the wet paper forming surface of the paper making wire 22 is separated from the wet paper 100 by the paper making wire 22 being inverted along the outer periphery of the specific roller 21a and separated from the wet paper 100. Is transferred to the cambus belt 415 that is inverted by the specific roller 412a of the drying device 4.
(Drying process)
In the drying device 4, the transferred cambus belt 415 of the wet paper 100 advances toward the drying roller 41, the wet paper 100 is sandwiched between the cambus belt 415 and the drying roller 41, and the wet paper 100 is generated by the heat received from the drying roller 41. Is dried to obtain dry paper 101. Then, the scraper portion 400 peels the dry paper 101 from the drying roller 41.
(Finishing process)
The dry paper 101 peeled off from the drying roller 41 is conveyed to the cutting transfer unit 520, the cutting device 530, and the downstream transfer unit 540 by the first roller pair 511 and 511 of the upstream transfer unit 510. In the following steps, the control unit repeats normal control and disconnection control.
(Normal control)
As shown in FIG. 2, in normal control, the control unit operates the upstream transport unit 510 at a set speed, the cutting transport unit 520 and the downstream transport unit 510 at a speed substantially equal to the set speed, and the dry paper 101. (S1). Here, the cutting transport section 520 and the downstream transport section 510 are set to a speed slower than the set speed, for example, from 95% to 99.9% of the set speed so as not to apply tension to the dry paper 101. It is preferable to adjust.

Next, it is determined whether or not the tip edge of the dry paper 101 to be conveyed has reached a set distance with respect to the cutter blade pairs 531 and 513 of the cutting transfer unit 520, for example, a distance corresponding to the length in the vertical direction A4. (S2).
(Disconnection control)
The control unit performs cutting control when the transport distance of the dry paper 101 reaches the set distance. That is, the cutting transport section 520 and the downstream transport section 540 are stopped, and the dry paper 101 is sandwiched between the second transport roller pairs 521a and 521b, the third transport roller pairs 541 and 541 and the fourth transport roller pairs 542 and 542. And put it in a restrained state (S3).

Then, the cutting device 530 is operated to cut the dry paper 101 with the cutter blade pairs 531 and 531 (S4).

The first transfer roller pair 511 and 511 of the upstream transfer section 510 always convey the dry paper 101 toward the cutting transfer section 520 at a set speed in both normal control and cutting control. Therefore, the dry paper 101 bends upward on the transport path in the Lr between the first transport roller pair 511 and 511 and the second transport roller pair 521a and 521b in a loop shape of the set height Hr, and the loop accommodating space portion. It stays at 522.

The loop of the dry paper 101 staying in the loop accommodating space 522 lifts the push-down portion 523, and the push-down portion 523 swings upward around the support shaft 523a.

When the cutting device 530 cuts the dry paper 101, the downstream transport unit 540 cuts the sheet sheet (cut material) of the dry paper 101 after cutting at a discharge speed faster than the set speed (papermaking speed) on the downstream pedestal (illustrated). High-speed transport toward (omitted) (S5).

It is determined whether or not the dry paper 101 is thick paper (S6), and whether or not the rear end of the sheet-fed material in the transport direction is separated from the cutting edge of the cutter blade pairs 531 and 531 by the set distance Lset to the downstream side in the transport direction. Judge. In the case of thin paper, it is determined whether or not it has been conveyed by, for example, 18 mm (S7), and in the case of thick paper, it is determined whether or not it has been conveyed by, for example, 12 mm (S8).

This judgment is due to the following reasons. When the sandwiched state of the second transport rollers 521a and 521b of the cutting transport section 520 is released while the downstream transport section 540 transports the leafy vegetables of the dry paper 101, the dry paper 101 staying in the loop accommodating space section 522. Is rapidly sent to the downstream side in the transport direction, and the loop is eliminated.

At this time, the rear end of the sheet-fed sheet of the preceding dry paper 101 is separated from the cutting edge of the cutter blade pair 531 and 513 to the downstream side in the transport direction by the set distance Lset during the maximum distance Lmax from the blade edge of the cutter blade pair 531 and the third transport roller pair 541 and 541. If not, the tips of the strips of the subsequent dry paper 101 collide with each other and jam occurs. Therefore, the above-mentioned judgment is made.

Then, the control unit maintains the holding state of the second transport rollers 521a and 521b of the cutting transport unit 520 until the rear end of the dry paper 101 in the transport direction is transported by 12 mm or 18 mm as described above. Restrain the strip of 101.

Here, the change control of the set speed (papermaking speed) of the upstream transport unit 510 will be described. When the supply amount of the pulp suspension supplied from the head box 23 to the papermaking wire 22 is kept constant, the thickness of the wet paper 100 is adjusted by increasing or decreasing the set speed (papermaking speed) of the papermaking wire 22. .. By keeping the supply amount of the pulp suspension constant, the thickness can be adjusted while ensuring the stability of the quality of the wet paper 100.

For example, if the supply amount of the pulp suspension is kept constant and the set speed (papermaking speed) of the papermaking wire 22 is increased, the thickness of the wet paper 100 and the dry paper 101 is reduced to become thinner, and the increase in the set speed causes the thickness of the wet paper 100 and the dry paper 101 to become thinner. The amount of slack in the dry paper 101 generated during cutting control increases. Therefore, the control unit maintains the holding state of the second transport rollers 521a and 521b of the cutting transport unit 520 until the rear end of the dry paper 101 in the transport direction is transported by 18 mm as described above. Restrain the strip of paper.

The papermaking wire 22, the drying roller 410, and the first transport roller pair 511 and 511 do not necessarily have to transport the wet paper 100 at the same speed, and may transport the wet paper 100 at different speeds. As a result, the wet paper 100 can be prevented from being damaged or slackened in the papermaking process, and can be properly conveyed.

Further, when the supply amount of the pulp suspension is kept constant and the set speed (papermaking speed) of the papermaking wire 22 is decreased, the thickness of the wet paper 100 and the dry paper 101 increases and becomes thicker, and the set speed decreases. The amount of slack in the dry paper 101 generated during cutting control is reduced. Therefore, the control unit maintains the holding state of the second transport rollers 521a and 521b of the cutting transport unit 520 until the rear end of the dry paper 101 in the transport direction is transported by 12 mm as described above. Restrain the strip of paper.

Therefore, the stop time of the cutting transport unit 520 in the cutting control is adjusted based on the increase / decrease in the set speed (papermaking speed) of the upstream transport unit 510.

The control unit can make the stop time of the cutting transfer unit 520 in the cutting control longer than when the set speed of the upstream transfer unit 510 is high and slow. In this case, it is possible to easily prevent the succeeding strip from colliding with the rear end of the preceding cut when the pinched state is released. The loop can be canceled by releasing the pinched state.

Collision can be avoided when the pinched state is not released. At that time, the loop can be eliminated by adjusting the acceleration and the maximum speed of the retention elimination speed to appropriate values.

The control unit can shorten the stop time of the cutting transfer unit 520 in the cutting control as compared with the case where the set speed of the upstream transfer unit 510 is high and slow. In this case, the loop can be properly resolved. At that time, when the pinching state is released by restarting the transport of the cutting transport unit 520 before releasing the pinching state and slowing the transport speed at the time of resuming the transport than when the set speed of the upstream transport unit 510 is slow. The risk of collision with the vehicle can be reduced.

Collision can be avoided when the pinched state is not released. Further, by making the transport speed at the time of resuming the transport of the strip-shaped object by the cutting transport unit 520 slower than when the set speed of the upstream transport unit 510 is slow, the risk of collision can be further reduced.

The control unit can make the retention elimination speed of the cutting transfer unit 520 in the cutting control faster than when the set speed of the upstream transfer unit 510 is high. In this case, the loop can be properly resolved. Further, by lengthening the stop time, it is possible to avoid a collision when the pinched state is released. Then, if the pinched state is not released, the collision can be released.

The control unit can slow down the retention elimination speed of the cutting transport unit 520 in the cutting control as compared with the slow speed when the set speed of the upstream transport unit 510 is high. In this case, it is difficult to collide. In addition, the loop can be eliminated by releasing the pinched state.

Then, when the pinched state is not released, if necessary, the stop time at the time of cutting is shortened, or the time until the maximum speed at the retention elimination speed is reached after the transportation of the strip-shaped object is restarted by the cutting transport unit 520. By shortening it, the loop can be eliminated.

That is, the faster the set speed (papermaking speed) of the upstream transport section 510, the larger and longer the loop of the dry paper 101 staying in the loop accommodating space section 522 while the cutting transport section 520 is stopped, and the cutting transport section 520 becomes longer. When the sandwiched state of the second transport roller pair 521a and 521b is released, the dry paper 101 rapidly fed to the downstream side in the transport direction reaches farther.

Therefore, the stop time of the cutting transport unit 520 is set long enough to increase the set speed (papermaking speed) of the upstream transport unit 510.

Further, as the set speed (papermaking speed) of the upstream transport section 510 is slower, the loop of the dry paper 101 staying in the loop accommodating space section 522 while the cutting transport section 520 is stopped becomes smaller and shorter, and the cutting transport section 520 becomes smaller and shorter. When the sandwiched state of the second transport roller pair 521a and 521b is released, the distance reached by the dry paper 101 rapidly fed to the downstream side in the transport direction is shortened.

Therefore, the stop time of the cutting transport unit 520 is set so short that the set speed (papermaking speed) of the upstream transport unit 510 is decelerated. By shortening the stop time of the cutting transport unit 520, it is possible to suppress the occurrence of wrinkles, warpage, etc., which tend to occur as the dry paper 101 becomes thicker during loop formation.

Next, when the rear end of the sheet leaf of the preceding dry paper 101 is separated from the cutting edge of the cutter blade pair 531 and 513 to the downstream side in the transport direction by a set distance Lset, the cutting control is restored to the normal control.

That is, the holding state of the second transport roller pair 521a and 521b of the cutting transport portion 520 is released (S9). This opening is performed by moving the upper non-driving side transport roller 521a upward with respect to the lower drive side transport roller 521b.

By opening the pinched state, the dry paper 101 staying in the loop accommodating space 522 is rapidly sent to the downstream side in the transport direction, and the loop is eliminated. When the loop is low, the strip of dry paper 101 is elastically forced to eliminate the loop in a short time, restore the straight posture, and extend along the transport path.

If the loop becomes too high, the force for restoring the straight posture weakens, and it becomes difficult to eliminate the loop in the unrestrained state.

However, the push-down portion 523 is lifted by the wet paper 101 that stays in the loop accommodating space portion 522 in a loop shape and swings upward during cutting control, and the second transport roller pairs 521a and 521b hold the dry paper 101. When the state to be pressed is released, the pushing-down portion 523 applies a downward force to the loop due to its own weight.

The force applied by the pushing-down portion 523 contributes to the elimination of the loop, and even if the loop of the dry paper 101 becomes high, the strip-shaped object of the loop can be quickly extended on the transport path. Further, the skewing of the dry paper 101 is corrected by opening the sandwiched state of the second transport roller pair 521a and 521b.

Next, it is determined whether or not the state of opening the second transport roller pair 521a and 521b has elapsed by the set opening time (S10).

When the opening time set for the elapsed time is satisfied, the holding state of the second transport roller pair 521a and 521b is restarted (S11).

That is, the upper non-driving side transport roller 521a is moved downward, and the dry paper 101 is sandwiched between the lower drive side transport roller 521b and the upper non-drive side transport roller 521a to restart the transport. The strip-shaped dry paper 101 is sent out onto the transport path toward the downstream transport section 540 through the cutting device 530.

At this time, in the present embodiment, the cutting transport unit 520 transports the dry paper 101 at a retention elimination speed faster than the set speed at the initial stage of transport restart after the cutting control. This retention elimination speed is set within the range of 115% to 130% of the set speed (papermaking speed).

Then, the presence or absence of slack in the dry paper 101 is determined (S12), and when the slack is eliminated, the transport speed of the cutting transport unit 520 is returned to the set speed.

The control unit adjusts the retention elimination speed of the cutting transport unit 520 according to the increase / decrease of the set speed (papermaking speed) of the upstream transport unit 510. Therefore, the slack of the dry paper 101 is quickly eliminated.

When the transport speed of the upstream transport unit 510 is slow, the transport speed of the cutting transport unit 520 is also slowed down to adjust the tension related to the strip-shaped object and prevent the strip-shaped object from being damaged.

In the present embodiment, the holding state of the second transport roller pair 521a and 521b is released at the initial stage of resuming transport after cutting control. However, prior to the opening of the pinched state, the transport by the cutting transport unit 520 is restarted while the pinched state of the second transport rollers 521a and 521b is maintained, and then the pinched state of the strip-shaped material with respect to the dry paper 101 is held during the transport. It is also possible to cancel.

Further, in the present embodiment, the holding state of the second transport roller pair 521a and 521b is opened, but it is also possible to operate without opening the pinching state at all.

Further, the cutting transport unit 520 may be configured not to have a mechanism for releasing the pinched state because the second transport roller pairs 521a and 521b do not approach and separate from each other. In this case, the rotation drive and rotation stop of the second transport roller pair 521a and 521b are repeated. Then, the timing at which the rotational drive of the second transport roller pair 521a and 521b is restarted, that is, the timing at which the cutting transport unit 520 restarts the transport of the wet paper 100 after the dry paper 101 is cut by the cutting device 530, and the cutting transport. The transport speed of the unit 520 is adjusted according to the transport speed of the upstream transport unit 510.

In this case, since the slack of the dry paper 101 is not eliminated at once by opening the sandwiched state of the second transport roller pair 521a and 521b, the sheet-fed material of the preceding dry paper 101 is followed by the subsequent dry paper. The situation where the strips of 101 collide does not occur.

Therefore, the control unit adjusts the stop time of the cutting transfer unit 520 in the cutting control according to the increase / decrease of the set speed (papermaking speed) of the upstream transfer unit 510, and adjusts the stop time of the cutting transfer unit 520. Is increased or decreased according to the increase or decrease of the set speed (papermaking speed) of the upstream transport unit 510.

For example, as the set speed (papermaking speed) of the upstream transport unit 510 becomes faster, the stop time of the cutting transport unit 520 is shortened, and the operation restart of the cutting transport unit 520 after cutting control is accelerated, so that the set speed is set. By suppressing the increase in the amount of slack in the dry paper 101 due to the increase in the (paper making speed) and increasing the retention elimination speed to such an extent that collision does not occur, the slack in the dry paper 101 can be quickly eliminated.

Next, the thickness of the wet paper 100 is adjusted by keeping the supply amount of the pulp suspension supplied from the head box 23 to the papermaking wire 22 constant and increasing or decreasing the set speed (papermaking speed) of the papermaking wire 22. In this case, the rotation speed of the motor is adjusted by adjusting the supply current, supply voltage, and the like to the motor that drives the cutting device 530. Thereby, the time required for cutting the dry paper 101 by the cutting device 530 may be adjusted according to the thickness of the dry paper 101. In particular, by shortening the time required for cutting the dry paper 101 when increasing the set speed of the upstream transport unit 510, it is possible to suppress an increase in the amount of slack in the dry paper 101 during cutting control.

Further, the thickness of the wet paper 100 is adjusted by keeping the set speed (papermaking speed) of the papermaking wire 22 constant and increasing or decreasing the supply amount of the pulp suspension supplied from the head box 23 to the papermaking wire 22. Is also possible.

Further, it is also possible to provide the control unit with an input unit for changing and setting the heating time for the wet paper 100 to pass through the drying device (heating unit) 4 or the heating temperature of the drying device (heating unit).

With this configuration, when the user determines that the dry paper 101 is not sufficiently heated, or when it is determined that the dry paper 101 is excessively heated, the heating time and the heating temperature can be arbitrarily changed.

In the following, control when the user changes the heating time will be described with reference to FIG.

Papermaking is started, and it is determined whether or not a drying adjustment for changing the heating time is instructed (S13).

When the drying adjustment is instructed, it is determined whether or not the current operating condition is under cutting control (S14).

Waiting for the timing of the cutting control, it is determined whether the drying adjustment is an instruction to increase or decrease the heating time (S15).

In the case of an instruction to increase the heating time, the transfer speeds of the drying roller 41, the first transfer roller pair 511, 511, the cutting transfer unit 520 and the downstream transfer unit 540 are decelerated (S16).

Due to the deceleration of the transport speed of each part in S16, a speed difference is generated between the papermaking wire 22 and the papermaking wire 22 on the upstream side, and slack is formed in the wet paper 100. After waiting for a time until the deceleration of the transport speed of each part in S16 is completed (S17), the supply amount of the head box 23 is reduced and the transport speed of the papermaking wire 22 is decelerated (S18).

The transport speed of the papermaking wire 22 is confirmed (S19), and normal control is restored.

When the heating time is instructed to decrease, the supply amount of the head box 23 is increased and the transport speed of the papermaking wire 22 is accelerated (S20).

Acceleration of the transport speed of the papermaking wire 22 in S20 causes a speed difference between the drying roller 41 and the cutting transport portion 520, and slack is formed in the wet paper 100. It waits for a time until the acceleration of S20 is completed (S21), and then accelerates the transfer speed of the drying roller 41 and the cutting transfer unit 520 (S22).

The transport speed of the drying roller 41 is confirmed (S23), and normal control is restored.

By the above operation, the time that the wet paper 100 stays in the drying device 4 is adjusted to increase or decrease. Further, by increasing or decreasing the supply amount of the pulp suspension supplied from the head box 23 to the papermaking wire 22 according to the increase or decrease in the transport speed of the drying device 4, the thickness of the wet paper 100 is equalized before and after the drying adjustment. And.

It is not always necessary to provide the control unit described above with an input unit for changing and setting the heating time for the wet paper 100 to pass through the drying device (heating unit) 4 or the heating temperature of the drying device (heating unit). , It is not necessary to have a function to set the heating time by the user.

Instead of transporting the leafy vegetables at a discharge speed faster than the set speed after cutting the strip, the downstream transport unit may discharge the leafy vegetables at the same speed as the set speed after cutting the strip, or is slower than the set speed. It may be discharged at a speed. In these cases, for example, by appropriately adjusting the transfer restart timing, the release timing of the pinched state, the retention elimination speed, etc. of the cutting transfer unit 520, the subsequent strips may not come into contact with the preceding sheet leafy vegetables. can do.

1 Waste paper processing equipment 2 Paper making equipment 4 Drying equipment 5 White water storage part 6 Wet paper dispersion part 20 Paper making part 21 Roller of the first group 21a Specific roller 22 Paper making wire 22a Wet paper forming transfer route 22b Return route 23 Headbox 24 Cleaning nozzle 25 Squeezing and dehydrating part 25a, 25b Squeezing and dehydrating roller 41 Drying roller 61 Dispersing plate 100 Wet paper 101 Dry paper 301 Wet paper transfer part 400 Scraper part 412 Roller 412a Specific roller 415 Cambus belt 510 Upstream transport part 511, 511 First transport roller Pair 520 Cutting transport section 521a, 521b Second transport roller pair 522 Loop accommodation space section 523 Push-down section 523a Support shaft 530 Cutting device 531 and 513 Cutter blade pair 540 Downstream transport section 541, 541 Third transport roller pair 542, 542 No. 4 transfer roller pair

Claims (4)

An upstream transport section, a cutting transport section, a cutting device, and a downstream transport section are arranged on the strip-shaped transport path, and a control section for normal control and cutting control of each section is provided.
The upstream transport unit always transports the strip-shaped material to the cutting transport unit at a set speed in both normal control and cutting control.
The cutting transport unit transports the strip-shaped material to the downstream transport unit through the cutting device at a speed substantially equal to the set speed in normal control, stops the transport of the strip-shaped material in the state of sandwiching the strip-shaped material in the cutting control, and upstream transports. The strip-shaped object transported from the section is retained in a loop on the transport path, and the pinched state with respect to the strip-shaped object is released at the initial stage of resuming transport after cutting control or during transport.
The downstream transport section transports the strips at a speed almost equal to the set speed in normal control, stops together with the cutting transport section in the cutting control, and after cutting the strips, the single leafy vegetables after cutting at a discharge rate faster than the set speed. To the downstream side,
The control unit is a strip-shaped object cutting device characterized in that the stop time of the cutting transport unit in cutting control is adjusted based on an increase or decrease in the set speed of the upstream transport unit. The control unit conveys the strip-shaped object at a retention elimination speed faster than the set speed at the initial stage of transfer restart after cutting control in the cutting transfer unit, and increases or decreases the retention elimination speed according to the increase or decrease of the set speed of the upstream transfer unit. The strip-shaped object cutting device according to claim 1 , wherein the strip-shaped object is adjusted. The cutting transport unit has a pair of transport rollers facing each other via the strip-shaped object, and stops in a state where the strip-shaped object is sandwiched between both transport rollers in the cutting control, and the strip-shaped transport section is stopped between the two transport rollers in the normal control. 2 . The strip-shaped object cutting device described. The cutting transport section is on the upstream side of the pair of transport rollers, a loop accommodating space portion in which the strip-shaped object transported from the upstream transport section is retained in a loop shape on the transport path, and a loop-shaped strip-shaped object in the loop accommodating space portion. The strip-shaped object cutting device according to claim 3 , further comprising a push-down portion for pressing toward a transport path.

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