JPH0521819B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a web roll forming apparatus that continuously manufactures web rolls such as wet paper rolls used for wiping paper etc. using a plurality of winding shafts that are driven to rotate on their own axis. .

Prior art JP-A-62-153066 discloses a pair of endless chains running in an ellipse parallel to each other in the vertical direction, a plurality of winding shafts horizontally installed at equal intervals on both of the endless chains running in an elliptical direction, and each winding shaft being connected to an endless The winding shaft is rotatably supported on the chain and is moved along an elliptical trajectory together with the endless chain, with the winding shaft being driven to the preliminary winding position and the winding shaft being driven to the final winding position. A pair of drive belts are stretched along the gap, and the drive belts are pressed against the surface of the web being wound at the preliminary winding position and the final winding position, and the driving belt is applied to the winding web by one running force of the drive belt. A frictional rotational force is applied to the web, and the winding shaft, which is freely rotatable, is rotated using the frictional rotational force applied to the web as a medium to perform finishing winding, and the belt contact state is maintained until a fixed amount of winding is reached. That's what I do.

Problems to be Solved by the Invention However, since the endless chain of the above-mentioned web roll forming device is made up of a large number of links connected by connecting pins, the accumulated play in the connecting pins causes backlash, vibration, and uplift during operation. Or stretching and sagging,
Meandering occurs, and inevitably these backlashes, vibrations, thrusts, etc. are applied to the take-up shaft, and elongation, slack, and meandering impede the stable operation of the take-up shaft, making it difficult to wind the web properly. Not only do you do it, but
This causes troubles such as wrinkles or loosening of the web to be wound, or bamboo shoot-like winding, making it difficult to carry out. Furthermore, as the amount of take-up increases, the tension of the drive belt pressed against the take-up web changes, and the frictional rotational force applied to the take-up web also changes, making the rotation of the take-up web and take-up shaft constantly unstable.

The present invention solves the above-mentioned problems and enables a winding shaft to properly and beautifully wind the web.

Means for Solving the Problems The present invention, as a means for solving the above problems in a web roll forming apparatus, arranges the plurality of web winding shafts in a circular manner on a turntable, and rotates the turntable intermittently. Each of the web winding shafts is provided to be driven to rotate intermittently by the intermittent rotational drive of a turntable, and each of the web winding shafts is provided to be driven to continuously rotate (rotation drive). The web winding shaft is sequentially supplied to the web preliminary winding position and the final winding position by intermittent revolution drive accompanying the intermittent rotational drive of the turntable, and the web is rotated by the rotational drive of the web winding shaft at each winding position. The structure is such that winding can be carried out properly.

A web winding blade is rotatably provided on the side of the web supply side of the web winding shaft located at the web preliminary winding position, and when the web winding blade is rotated in one direction, the web winding blade is rotated in one direction. The tip is pressed against the web, and when the perforation reaches the tip of the blade, the web is cut, and the cut end on the web supply side is moved to the lower part of the web winding shaft which is in the pre-winding position as the rotation of the blade progresses. It is configured so that it is scooped up to the circumferential surface and wound onto the same winding shaft.

According to the present invention, each web winding shaft is stably supported by the turntable, and the intermittent rotational drive of the turntable prevents the elongation, sagging, meandering, etc. that are harmful to the web winding, and allows the web winding shaft to be stably supported by the turntable. It is possible to reliably bring the web to the winding position and the final winding position (by rotating it), and also to properly wind it by rotating it without causing backlash, vibration, thrusting, etc. that are harmful to the web winding. It promotes the growth of the web roll without causing bamboo shoot-like winding, wrinkles, sagging, etc., and makes it possible to form a beautiful web roll. The tip of the web winding blade is pressed against the web, and the perforation of the next coming web is cut with the blade tip, and the cut end of the feed side of the web is subsequently moved to the web winding shaft in the pre-winding position using the same blade. Since the web is scooped up to the lower circumferential surface of the web and continues winding, it is extremely smooth to continuously run the perforated web, wind it onto each winding shaft without interruption, and cut the perforation after each winding. In addition, it can be carried out properly, and by simply rotating the web winding blade in one direction and pressing it against the web, the perforation cutting of the running web that has reached the above-mentioned amount of winding and winding onto the next winding shaft can be ensured. can be done.

That is, the continuous winding can be performed without causing cutting errors or cutting defects. Further, since the blade has both the cutting function and the winding function, the desired purpose can be achieved with a simple structure.

Furthermore, when the web is moved from the preliminary web winding position to the final winding position and when the winding amount increases during the final winding, the winding shaft is slip-rotated in accordance with the movement and the growth amount, which may lead to web breakage, etc. This makes it possible to maintain the circumferential speed of the web roll at a constant speed and perform winding more appropriately.

Embodiment In FIGS. 1 and 2, 1 is a turntable, and 2 is a web winding shaft. Further, 3 is a rotational drive shaft of the turntable 1, and a drive is applied to the rotational drive shaft 3 from a main drive shaft 4 driven by a motor M via a conduction band 5 of a chain or belt or a gear. The rotary drive shaft 3 provides intermittent rotational drive in which rotation and rotation stop are periodically repeated within a rotation angle of 360°. The intermittent rotational drive is set depending on the number of web take-up shafts 2. For example, when there are 6 web take-up shafts 2, the above rotation angle (revolution angle of the take-up shafts described later) is 6.
The angle is 360 degrees per minute, that is, 60 degrees, and it rotates at the same cycle every time a certain amount of winding is completed, and at other times it stops and finishes winding is performed during this period.

For example, a known Geneva cam mechanism 6 is used as a means for obtaining the above-mentioned intermittent rotational motion. 7 is an input shaft of the Geneva cam mechanism 6, and 8 is an output shaft of the Geneva cam mechanism 6. Input is input to the input shaft 7 from the main drive shaft 4, and output is output from the output shaft 8 to the rotary drive shaft 3 of the turntable 1. The configuration provides rotational drive.

On the other hand, a plurality of the web winding shafts 2 are arranged at equal intervals on a circular locus centered on the drive shaft 3 of the turntable 1, and are rotatably attached to the turntable 1. Reference numeral 9 denotes a rotary drive shaft common to the web winding shaft, which has a double shaft structure with the rotary drive shaft 3 of the turntable 1, and is disposed at the center of the turntable 1. A driving force is constantly and continuously applied to the common rotary drive shaft 9 from the main drive shaft 4 via a conduction band 13. Further, the turntable 1 is provided with a unique rotary drive shaft 10 dedicated to each of the web take-up shafts 2 in the same number as the web take-up shafts 2 on a concentric locus with the web take-up shaft 2.

The input shaft portion and the output shaft portion of the unique rotary drive shaft 10 are coupled via a friction clutch 33,
The configuration is such that slip rotation occurs as the amount of web wound onto the web winding shaft 2 increases. While the winding speed and web supply speed of the web winding shaft 2 are constant, the circumferential speed of the web roll changes as the winding amount increases. The friction clutch 33 absorbs this speed difference by slip-rotating the take-up shaft 2, thereby eliminating the problem of applying excessive tensile force to the web W and causing the web to break. Also, the slip rotation mentioned above is performed by the web take-up shaft 2.
This is also done when the web is driven to revolve from the preliminary winding position _P1 to the final winding position _P2 , absorbing the web tensile force accompanying the revolution drive, preventing the web from being cut, and guaranteeing its constant speed supply.

One end (output shaft side) of the unique rotary drive shaft 10 as described above is connected to the web winding shaft via a conduction band 14, and a gear 12 provided at the other end (input shaft side) A gear 11 provided at the end of the common rotation drive shaft 9 and arranged in the center of the turntable 1 is engaged with the common rotation drive shaft 9, and the driving force of the common rotation drive shaft 9 is transmitted to the unique rotation drive shaft 10 via the gears 11 and 12. The driving force of the drive shaft 10 is applied to each web winding shaft 2 through the conduction band 14, and each web winding shaft 2 is individually driven to rotate (automatically driven). The rotational drive of each web winding shaft 2 is a continuous rotational drive, whereas the turntable 1 is an intermittent rotational drive.

Therefore, each web winding shaft 2 is driven to rotate intermittently (intermittent revolution drive) on a circular locus by the intermittent rotation drive of the turntable 1 while performing the continuous rotation drive. As mentioned above, when there are n web winding shafts 2, this intermittent revolution drive is 360 degrees for n, and the intermittent revolution drive causes the web winding shaft ( _first The winding shaft) is moved to the finishing winding position _P2 , and _the subsequent second winding shaft is brought to the preliminary winding position _P1 . The web take-up shaft is moved to the position where the n-1th take-up shaft is.

The turntable 1 stops between each intermittent rotation drive, and web winding continues during this period.
Specifically, the web winding on the winding shaft 2 is performed while the shaft 2 is being driven to revolve from the preliminary winding position to the finishing winding position, and at the finishing winding position where the revolution drive is stopped, and a fixed amount of winding is reached. At this time, the n-1th web winding shaft is moved to the previous position. The web that has been wound in a fixed amount is cut on the web supply side, and is then driven to revolve.

This web roll forming apparatus includes a web winding blade 15 which also serves as the cutter for cutting the web, and is arranged on the side of the web supply side of the web winding shaft 2 provided at the preliminary winding position _P1 . The web winding blade 15 has a rake 16 at its tip end curved with a curvature that is approximately the same as the curvature of the web winding shaft 2, and its base end is attached to a sliding bar 17, and the web winding blade 15 is attached to a sliding bar 17. The web winding shaft 2 is rotatable, and the rake claw 16 is brought to the preliminary winding position _P1 by rotating the shaft in one direction.
The cut supply side web end is scooped up along the lower surface and applied to the circumferential surface of the shaft 2, and the web is wound onto the shaft 2 in cooperation with a web winding belt to be described later. It is also arranged so that when it rotates in the other direction, it retreats to a position where it does not interfere with web supply.

In the process of moving toward the web winding shaft 2, the web winding blade 15 scoops the web W under tension between the web winding shaft 2 at the final winding position _P2 and the feed roll 18. 16 is pressed, and when the perforation reaches the rake claw 16, it is cut into the rake claw 16 to cause cutting. After cutting the web, the cut end of the web is subsequently scooped up and applied to the lower peripheral surface of the web winding shaft 2 located at the preliminary winding position _P1 as described above.

The web W is unwound from the raw roll W' and passes through the slitter 20, where it is slitted into a plurality of strips. After the slitting, the web W passes through the feed roll 21 disposed above the turntable and is sent to the perforation forming device 22. The perforation forming device 22 forms perforations at predetermined intervals on each of the slitted webs W, and after the perforations are formed, the webs are pre-rolled via the feed roll 18 according to the winding state at that time. Provided to the winding shaft 2 present at the take-up position P ₁ or the final winding position P ₂ ,
As described above, when the fixed amount of winding is reached at the final winding position _P2 , the rake claw 16 of the web winding blade 15 is pressed against each web W to perform the cutting,
Provide the cut end for wrapping.

The web take-up shaft 2 is formed of a suction shaft and has a web suction function as a means for enhancing the winding effect at the start of web winding.

As shown in FIG. 3, as the web suction means,
The web take-up shaft 2 has a hollow structure to form a suction duct 23 extending in the axial direction, and a large number of suction holes 24 communicating with the suction duct 23 are provided on the surface thereof. In addition, a suction port 25 that opens at the back of the turntable 1 is provided at the base end of the web winding shaft 2 (one end of the suction duct 23), and the other side is located at the preliminary winding position.
At P ₁ , a suction device 26 that applies negative pressure to the web winding shaft 2 is provided, and the suction port 27 of the suction device 26 is connected to the suction port 25 of the web winding shaft 2 provided at the preliminary winding position P ₁ . The web winding shafts 2 are disposed at opposing positions and communicated with each other at the same position _P1 , and the web winding shaft 2 at the same position _P1 is brought into a suction operation state. Further, the suction device 26 and the web winding shaft 2 are shut off after the preliminary winding amount reaches the required amount.

For example, the suction socket 25 is formed by a suction cylinder 28, and the web winding shaft 2 is connected to the suction cylinder 28.
8, and the other end of the suction receiving tube 28 is attached to the turntable 1, so that the suction duct 23 extends in communication with the cylindrical hole of the mounting tube 28, and the other end of the suction receiving tube 28 is attached to the turntable 1. Connect the end opening to the above suction socket 2
5, the suction port 27 is formed by a suction tube 29, and the suction tube 29 is elastically supported by a return spring 30, so that the suction tube 29 is separated from the suction port 25 (suction tube 29). means to actuate the suction tube 29 in the suction path communicating position and the suction path blocking position, such as an electromagnetic solenoid 3.
1, and the web winding shaft 2 is at the preliminary winding position.
When P ₁ is reached, the solenoid 31 is actuated in a timely manner to press the suction tube 29 against the spring 30 and press the suction port 27 against the suction socket 25 to establish communication.

In this way, a suction force is generated in the suction hole 24, and the web applied to the circumferential surface of the web winding shaft 2 is attracted and captured by the suction force to the circumferential surface of the shaft 2.

Further, the peripheral surface of the web take-up shaft 2 has a tooth profile 32 as shown in FIG.
is formed into a tooth facing the winding direction shown by the arrow, the suction hole 24 is arranged in the valley of the tooth profile 32, and the tooth profile 3 is formed by drawing the web into the valley.
This improves the biting effect due to No. 2 and enhances the web catching effect.

Further, a web winding belt 34 is provided as means for winding up the web winding end at the preliminary winding position _P1 . The web winding belt 34 is suspended endlessly by a pair of rotors 35, and is attached to the web winding shaft 2 provided at the preliminary winding position _P1 .
is placed on the side opposite to the web supply side, and
It is provided so as to be able to approach and separate from the circumferential surface of the shaft 2, and before the web winding blade 15 brings the web end to the circumferential surface of the winding shaft 2, the rake claw 16 moves forward in a timed manner to scrape the belt surface. It is pressed against the circumferential surface adjacent to the circumferential surface of the web take-up shaft 2 to be followed, contacts the surface of the web take-up shaft 2, and moves in synchronization with the surface of the web take-up shaft 2, so that the web end provided by the rake 16 comes into contact with the belt. It is rolled up along the transition plane.

At this time, the web winding shaft 2 is exerting a suction action, and a suction force is applied to the web end provided by the rake claw 16 to ensure winding onto the shaft 2. The web take-up shaft 2
The suction action continues until the end of the web is wound at least once, and even after the web is separated from the web winding belt 34, its suction force attracts the web to the circumferential surface of the winding shaft and prevents it from coming loose. .

Similarly, the web winding belt 34 is preferably pressed against the circumferential surface of the winding shaft until the web end is wound at least once, and then separated to a non-contact position. The web winding belt 34 can be brought into contact with and separated from the winding shaft 2 by moving the entire belt 34, or by moving only the forward side of the belt 34 to the winding shaft 2 using a tension roll or the same bar. It may be placed in contact with and separated from the peripheral surface. Further, the belt 34 may be provided so as to be driven by the rotational driving force of the winding shaft 2, or may be driven by the rotor 35.

Furthermore, depending on the implementation, the above-mentioned web winding belt 34
A web guide 36 is provided at the web unwinding side end of the web winding belt 34, and the guide 36 approaches the winding shaft 2 in synchronization with the approach and separation of the web winding belt 34.
It is provided so that it can be moved apart, and it is also provided so that it is inclined above the winding shaft 2 when approaching the winding shaft 2. Due to the arrangement of the web guide 36, even if the web unwound from the unwinding end of the web winding belt 34 comes loose from the circumferential surface of the winding shaft, the looseness will be excessive and the web will not wind up. Accurately prevent defects from occurring.

Next, the configuration of the above-mentioned web roll forming apparatus will be explained as follows.
The operation will be explained based on FIG. 6 and FIG.

FIG. 5A shows a state in which the web W is being wound on the winding shaft 2 at the final winding position _P2 .

At this time, the web winding belt 34 is separated to a non-contact position, and similarly, the web winding blade 15 is retreated to a standby position (non-interference position with the web) as shown in FIG. A stopper 37 resists a spring 38 to hold it in the retracted position. The spring 38 biases the web winding blade 15 toward the forward position (web end scooping position).

As shown in FIG. 5B, when the web winding amount on the web winding shaft 2 at the final winding position P ₂ is about to reach a fixed amount, the web winding belt 34
The web winding shaft 2 is located at the preliminary winding position _P1 .
move to the contact position and prepare for web winding.

At the same time, the web guide 36 and the tension roll 42 also move together with the belt, so that the tension roll 42 forms a tensioned state of the web W with the feed roll 18, and the web guide 36 is brought above the take-up shaft 2. and prepare for web entrainment.

Further, as shown in FIG. 6B, the stopper 37 of the web winding blade 15 is removed, and the blade 15 is moved forward toward the web W by the spring 38. The guide element 41 hits the rotary cam 39 and is prevented from moving by the guide, and is placed in a standby state.

Further, as shown in FIGS. 5C and 6C, when the web W of a length corresponding to the fixed amount of winding is supplied,
The web winding blade 15 is advanced by the rotation cam 39 and presses its rake 16 against the web W in the tensioned state, and continues to move the web winding blade 15 as shown in FIGS. 5D and 6D. The blade 15 is further advanced by the guidance by the guide cam 39 and the tension by the spring 38, and during this time the rake claw 16
When the perforation of the web W arrives, rake claw 1
At the same time, the cut supply side web end is scooped up by the rake 16 and applied to the lower peripheral surface of the web winding shaft 2 which is rotating on its own axis at the preliminary winding position _P1 . . As mentioned above, the winding shaft 2 has a suction shaft structure, and the web winding belt 34 is in contact with the peripheral surface of the winding shaft just before the scoop 16 and is relatively driven.
The web end provided by the rake 16 is accurately caught on the circumferential surface of the shaft by the suction force of the winding shaft 2, and at the same time is wound onto the contact transition surface of the winding belt 34.

As shown in FIGS. 5E and 6E, after the web end is wound around the winding belt 34, the web winding blade 15 begins to move backward by the spring 38 under the guidance of the rotating cam 39. As shown in Figures 6F and 6G, the blade support lever 1 is moved by the cylinder 40 in the retracted position where there is no interference with the web W.
7 is pressed and supported against the spring 38, thereby separating the guide 41 from the rotary cam 39, cutting off the relationship, and re-engaging the stopper 37 to cut the same blade 15 for the next web cutting. Stand by in preparation for scooping operation.

Similarly, the web winding belt 34, tension roll 42, and web guide 36 are shown in FIGS.
As shown in , after the web end has been wound at least once, it retreats to the standby position.

On the other hand, after cutting the web in FIG.
form.

Thereafter, the turntable, which had been stopped during the preliminary winding and final winding, is rotated by a predetermined angle again, and each web winding shaft 2 is driven to revolve by the same angle. As a result _, as shown by the arrow in _FIG . The winding shaft 2 that can hold the web roll WR at P ₂ is moved to the position where the winding shaft continuing in front existed, and at the same time, the empty winding shaft continuing behind the winding shaft existing at the preliminary winding position is moved. is moved to the preliminary winding position in preparation for the next preliminary winding.

The web roll WR wound onto the winding shaft ₂ at the final winding position P ₂ is removed from the roll and discharged by the web roll discharge device 42 at the revolution drive position at the final winding position P 2 . The web roll discharge device 42 is formed by a pusher movable along the winding shaft 2 in the axial direction of the shaft 2, and by moving the pusher in the same direction, the web roll WR held on the winding shaft 2 is removed. Press and remove it from the tip of the shaft. The web roll discharging device 42 is retracted to a position where it does not interfere with the revolution of the winding shaft 2 when the winding shaft 2 revolves, and moves forward toward the base end of the winding shaft 2 when the revolution stops, and further moves in the axial direction as described above. The web roll is discharged by moving. In this manner, the idle winding shaft is brought to the preliminary winding position _P1 by the subsequent revolution drive.

Effects of the Invention As explained above, according to the present invention, a plurality of web winding shafts are stably supported on a turntable, and by intermittent driving of the table, the elongation, sagging, meandering, etc. harmful to web winding can be prevented. The web can be reliably brought to the preliminary winding position and the final winding position (revolution driven) without causing web winding, and it can also be automatically driven without causing backlash, vibration, thrusting, etc. that are harmful to web winding. To properly perform winding, to promote the growth of the winding amount without causing bamboo shoot-like winding, wrinkles, sagging, etc., and to form a beautiful web roll.

By simply pressing the tip of the web winding blade against the running web, the perforation of the next coming web can be reliably cut with the tip of the blade, and the cut end of the feed side of the web can be pre-winded with the same blade. It is possible to smoothly continue winding by scooping up the web to the lower peripheral surface of the existing web winding shaft, and while the perforated web is continuously running, it is possible to wind the web without interruption on each winding shaft and make a perforation after each winding. The continuous winding operation can be carried out very appropriately, and the above-mentioned continuous winding can be carried out without causing any cutting errors, cutting defects, or winding troubles. Further, since the blade has both the cutting function and the winding function, the desired purpose can be achieved with a simple structure.

Furthermore, when the web is moved from the preliminary web winding position to the final winding position and when the winding amount increases during the final winding, the winding shaft is slip-rotated in accordance with the movement and the growth amount, which may lead to web breakage, etc. This makes it possible to maintain the circumferential speed of the web roll at a constant speed and perform winding more appropriately.

[Brief explanation of the drawing]

Fig. 1 is a front view of a web roll forming apparatus showing an embodiment of the present invention, Fig. 2 is a side view of the same, showing a drive system for a turntable and a web take-up shaft, and Fig. 3 is a diagram of a web take-up shaft. cross-sectional view, 4th
The figure is a plan view of the web discharging device, FIGS. 5 A to G are front views showing the operating states of the web winding device in order of operation, and FIGS. 6 A to G are front views showing the operating device of the web winding blade in order of operation. It is a diagram. DESCRIPTION OF SYMBOLS 1... Turntable, 2... Web winding shaft, 3... Intermittent rotation drive shaft of turntable (intermittent revolution drive shaft of web winding shaft), 9... Common rotation drive shaft, 10... Unique rotation drive shaft, 15... Web Winding blade, 16... rake claw, 24... suction hole, 34... web winding belt, P ₁ ... preliminary winding position, P ₂ ... final winding position, W... web, WR
...web roll.

Claims (1)

[Claims] 1. A turntable and a plurality of web winding shafts each using the turntable as a carrier, each web winding shaft being arranged at equal intervals on a circular locus centered on the drive shaft of the turntable. The turntable is provided to be driven to rotate intermittently, and each of the web take-up shafts is provided to be driven to continuously rotate (rotate) and intermittently revolve around the circular locus by the intermittent rotational drive of the turntable. , each web winding shaft is sequentially supplied to a preliminary winding position and a final winding position of a web having perforations formed at predetermined intervals that is continuously supplied by the intermittent revolution drive, and each web winding shaft at each web winding position is A web winding blade is rotatably provided on the side of the web supply side of the web winding shaft located at the web preliminary winding position, By rotating the blade in one direction, the tip of the blade is pressed against the web and when the perforation reaches the tip of the blade, the tip of the blade cuts into the perforation and cuts the web, and further cuts the web supply side. A web roll forming device configured to scoop the end of the web onto the lower circumferential surface of a web take-up shaft located at a pre-winding position and wind it onto the web take-up shaft as the blade rotates. 2. The web roll forming apparatus according to claim 1, wherein each of the web take-up shafts is connected to an autorotating drive shaft via a friction clutch so as to slip and rotate when the web is taken up.