JPH07108743B2 - Web winding method and apparatus - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for winding a web and a surface winding device therefor.

(Prior Art) There are two basic methods for winding a web around a series of cores. Central winding and surface winding.

In center winding, the core is attached to the mandrel. The mandrel rotates at a high speed at the beginning of the winding cycle and is decelerated when the winding progresses and the web is wound into a wound body (log) having a predetermined diameter.

In surface winding, a core and a web wound around the core are moved by contacting a member such as a belt or a rotating roll operating at or near the traveling speed of the web.

U.S. Pat. No. 4,327,877 shows a typical example of a surface winding method and apparatus.

This method uses a rotating drum, and a suction unit is provided at a predetermined portion of the drum surface. The core and web move with the core adjacent the drum and the web proximate the take-up roll. As soon as the winding is completed and the log is almost formed, the speed of the drum becomes slow. At the same time, the web between the newly inserted core and the wound body just before becoming the log is attracted by the suction unit. The take-up roll speed remains constant as the drum speed slows. Therefore, the web is sucked onto the drum surface while the tension of the web between the newly charged core and the wound body is released. And the new core rolls on the web towards the drum,
Web tension increases again as the drum and core move. After that, the speed of the drum increases again.

(Problems to be Solved by the Invention) However, such a change in speed of the present apparatus and method leads to a decrease in processing speed for winding. In addition to this, breaks may occur at locations other than the predetermined perforations to relieve tension in the web before it breaks.

In view of these problems of the prior art relating to surface winding, the present invention provides a method for winding a web and an apparatus for winding the web, which allows the web to be wound at a high speed in all steps and break the web at an accurate position. It is intended to be provided.

(Means for Achieving the Object) In order to achieve the above-mentioned object, the method of the present invention is a method in which a web in which perforations for breaking are formed at intervals in the longitudinal direction is wound around a series of rolling cores. In a web winding method for continuously forming logs by taking a log, a first web pinch point is provided at a downstream position of a passage in which the web advances while being wound by a core, and a second web sandwiching point is provided at an upstream position of the passage. When each web sandwiching point is provided, the web advances through the passage, and when the advance perforation is located between the first web sandwiching point and the second web sandwiching point, at the second web sandwiching point,
The core inserted between the take-up roll and the fixed plate arranged at a position facing the take-up roll momentarily presses the web traveling on the fixed plate against the fixed plate to instantaneously advance the web. At the same time, at the same time, at the first web sandwiching point, sandwich the web between the second web sandwiching point and the wound body immediately before becoming the log, and feed the web to the wound body. Thereby, the web between the first web sandwiching point and the second web sandwiching point is tensioned to be broken at the perforations, and the broken web end on the downstream side of the passage is wound around the winding body. On the other hand, it is characterized in that the broken web end portion on the upstream side of the passage is wound on the fixed core, which has started rolling, from the fixed core.

The device of the present invention is a web winding device for continuously forming a log by winding a web in which perforations for breaking are formed at intervals in the longitudinal direction, and winding the web around a series of rolling cores. A frame, a web path within the frame that is advanced while being wound by a core, having a first web pinch point at a downstream position and a second web pinch point at an upstream position; A winding roll rotatably attached to the frame in the web passage, and a fixing member fixed to the frame with a space close to the winding roll and receiving a new core with respect to the winding roll. A plate, wherein the first web sandwiching point is the second web sandwiching point.
Located between the web pinch point and the winding body in the web passage immediately before becoming the log, and the second web pinching point and the web body sandwiching the web, the web being wound on the roll body. The second web sandwiching point is formed by a core and a fixed plate that are put between the winding roll and the fixed plate, and the second web sandwiching point is formed by a member that feeds the web. When the core is newly loaded, the first plate is momentarily pressed against the fixed plate to stop its progress.
The web sandwiching point and the second web sandwiching point cause the web between the two points to be tensioned and the web to be broken at the perforated portion located between the two points.

(Operation) The web is wound around the core that advances while rotating in the advancing passage, and gradually becomes thicker to have a diameter close to a log. First in the aisle
At the web sandwiching point, the web is sent to the winding body while being sandwiched, but at the second web sandwiching point located upstream of this, the web is pushed by the fixed core by the inserted new core and momentarily Stop. Therefore, when the winding on the preceding core progresses to form the wound body immediately before the log, and the new core is introduced into the passage in which the web advances, the first web pinch point and the second web pinch point. High tension is applied to the web located between the points. On the other hand, the perforation of the web is located between the sandwiching points. Therefore, the tension causes the web between the sandwiching points to be cut neatly and snugly at the perforations.

(Example) The present invention will be described in detail below based on an illustrated example.

FIG. 1 shows the winding device 200 when the web is wound to form a log and at the same time a new core is inserted in the transfer nip.

The web W is unwound from one or more parent rolls, embossed, laminated, printed, etc.,
Enter the winding device from the lower left in the figure. The web W passes through the pulling rolls 201 and 202 and is a perforated roll 2 which is perforated.
Sent to 03.

The perforating roll 203 has a plurality of flexible perforating blades.
These perforating blades perforate the web by operating against the anvil within a fixed perforation bar 204.

Then, the web W passes through the guide roll 205 and the driven roll 206, passes through the insertion nip 208 of the core, and continues to the winding body 207 immediately before the completion of winding. Fig. 2 shows the driven roll 2
The web passage after 06 is shown enlarged.

The wound body until the web is wound on the core and finally becomes a log is firmly held between the upper belt device 209 and the lower belt device 210. These belt devices 209 and 210 rotate and wind the winding body, and horizontally move the winding body from transfer to completion during the winding cycle.

The speed of the lower belt device 210 is slower than the speed of the upper belt device 209, and the amount thereof is set so that the winding body will be substantially at the position of the reference numeral 207 in the drawing when the winding is completed.

This speed difference is about 3% to 10% of the web travel speed and is adjusted by the operator to match the web length wound on the finished log (see FIG. 7 showing the drive diagram).

The symbols used in FIG. 7 have the following meanings.

CW indicates clockwise rotation.

CWC indicates counterclockwise rotation.

B indicates belt drive.

TB indicates timing belt drive.

CH indicates chain drive.

G indicates gear drive.

VS indicates variable drive.

M indicates a motor.

The left and right rolls 211 and 212 in the figure of the upper belt device 209 form the operating line of the upper belt device 209. The roll 212 located on the downstream side of the traveling path of the web is a drive roll. The roll 211 located on the upstream side of the traveling path of the web is the driven roll 2
It is movable and adjustable toward 06, which adjusts the core insertion nip 208 to fit the diameter of the core {range of 1.3 to 5.1 cm (1/2 to 2 inches)}. Upper belt device 2
The upstream roll 211 of 09 corresponds to an upper roll for winding. In addition, the driven roll 206 located therebelow
Will constitute the lower roll for forming the nip.

Further, the roll 212 located on the downstream side of the web advancing path.
Is in a fixed position that cannot be adjusted.

The left and right rolls 214, 215 in the figure of the lower belt device form the operating line of the lower belt device 210. The roll 214 located on the upstream side of the traveling path of the web is a drive roll, and its movement is adjustable in the vertical direction so as to match the diameter of the core or the wound body. Roll 215 located downstream of the web travel path
Is vertically adjustable to fit the diameter of the resulting log (normally 2 to 6 inches). Another roll 216 of the lower belt device is composed of a plurality of rolls, and each roll corresponds to each belt of the lower belt device 210. These multiple rolls 216
Is urged by air pressure or spring pressure and acts as a belt tension member, and applies an equal working tension to all belts.

In the figure, reference numeral 217 is a fixing plate, and the fixing plate 217 extends from the lower roll 206 for forming the nip to the belt on the upstream roll 214 of the lower belt device 210.

The core, which has been loaded into the core insertion nip and has performed the initial winding of the web, is rolled by the upper belt device 209 along the fixing plate 217. The fixed plate 217 is vertically movable and adjusted to match the diameter of the core.

Also shown in FIG. 1 is the core handling mechanism 218 of a tricuspid cycloid. This mechanism 218 is suitable for only continuous and stable rotational movement without cams, cranks or links.

The core handling mechanism 218 moves through the passages 226, 227, 228 forming the cusps 226a, 227a, 228a one revolution (one cycle) each time a log is created. As shown in FIGS. 2 and 3, the core handling mechanism 218 holds and conveys the core by the suction means while performing the above rotation. In this embodiment, since the continuous stripes of the adhesive to the core are formed at the surface position opposite to the surface position of the core sucked by the suction means, the core can be continuously sucked and held.
During each rotation (cycle), the core handling mechanism 218
Do one job.

(1). One from the core delivery wheel 219 at a time,
Pick up a new core. Suction is performed in the core support arm just prior to this picking operation.

(2). Press the core against the roll to apply the adhesive. The roll to which the adhesive is applied rotates slowly in the container of the adhesive to be transferred and its surface is always covered with a film of fresh adhesive. Adhesive roll 220
Rotates continuously at a constant speed regardless of the speed of the winding device (see FIG. 7). This action will cause the core to be lined with adhesive at the correct location for transfer (see Figures 2, 3 and 4).

(3). At the appropriate moment of the winding cycle, the core with adhesive is inserted into the core insertion nip 208 between rolls 206 and 211. This insertion is performed in synchronization with the perforation forming mechanism and the sandwiching plate mechanism 221, and the web is cut and transferred to a new core with a precise and constant number of sheets per log.

These operations of picking up the core in the core handling mechanism, applying the adhesive, and inserting the core into the nip are continuously performed, and are repeated in each cycle of winding the product. FIG. 1 shows three operating positions of the core handling mechanism 218 in one view.

Reference numeral 221 in the drawing denotes a sandwiching plate mechanism. This sandwich plate mechanism 221
Is for feeding the web W to the winding body 27 by firmly sandwiching the web W with respect to the upper belt device 209 at the moment the web W is separated (see FIG. 4). Pinch mechanism 22
1 is between a first web sandwiching point A at which the sandwiching plate sandwiches the web with respect to the upper belt and a second web sandwiching point B at which the core instantaneously fixes the web against the fixed plate 217. Is arranged at a position such that the interval is smaller than twice the interval between perforations.

Since the insertion of the core and the perforation of the perforations are timed and performed, the perforation P to be cut is located between the first web pinching point A and the second web pinching point B in FIG. Will be located. The surface speed of the sandwich plate is 20
The same as the speed of 9. At the first web pinch point A, the web is pinched between the pinch plate and the upper belt and is moving at full web transfer speed. At the second web pinch point B, the web is fixed or stopped between the perforated line P and the core, which is broken between the first web pinch point A and the second web pinch point B. This causes the following.

(1) To be able to accurately calculate the number of sheets for each log created.

(2) The web can be clearly broken at a certain perforation.

(3) The web folded around the core at the beginning of winding can be shortened (about 1/2 the distance between the first web sandwiching point A and the second web sandwiching point B), and the web can be wound relatively neatly. The
Rewinding the web to a new core will be successful.

(4) Capable of catching both layers of a two-layer web and folding it around the core.

FIG. 6 is a view of the sandwiching plate mechanism 221 as viewed vertically from above the center line of its shaft 222.

A plurality of arms extending in the radial direction are attached to the shaft 222, and each of the arms corresponds to each belt of the upper belt device 209. Each of these arms supports a curved sandwiching plate 221a. The sandwiching plate 221a has an axial length (axis) that is substantially the same as the width of the corresponding belt. The fixing plate 217 has an H-shaped hole 2 for each of the above arms.
With 17a. The sandwich plate 221a passes through the fixed plate 217 through these holes 217a. The hole 217a is formed small (narrow) so as not to hinder the winding of the web when the core rolls over it. The sandwich plate 221a passes through the vertical portions on both sides of the H-shaped hole 217a, while the arm passes through the lateral portions of the H-shaped hole 217a.

The pinching plate mechanism 221 continuously rotates during the winding cycle to pinch the web with respect to the upper belt device 209 several times or many times, but it does not interfere with the progress or winding of the web. Also, one log does not cause a break at the perforation except for one suitable web break. This is for the following reason.

(1) The passage of the web is located on the lower surface of the upper belt device 209 (see FIG. 2), and the upper surface of the lower roll 206 for forming the nip is aligned with the lower running surface of the upper belt device 209. This is because the lower roll 206 for forming the nip is arranged.

(2) The surface speed of the sandwich plate 221a is the same as the speed of the upper belt device 209.

The circumference of the path through which the surface of the sandwich plate 221a circulates is equal to an integral multiple of the distance between the perforations that define the sheet.

Figures 1 to 6 show a circumference of 114.3 cm (45 inches) (10
It shows a sandwich plate mechanism of × 11.4 cm (4.5 inches) / sheet. This is a multiple of 10 (10
0,130,210, etc.).

The sandwich mechanism may have other dimensions, but must meet some design criteria, such as:

(1) The circumference of the circulation path on the surface of the sandwich plate is equal to an integral multiple of the length of one sheet.

(2) The distance between the first web sandwiching point A and the second web sandwiching point B in FIG. 4 is shorter than twice the sheet length. In the United States, this is less than the 22.9 cm (9 inches) of most demanding toilet paper. Less important is European products, which have a seat length of approximately 140 mm (approximately 5.5
Inches).

(3) The surface speed of the pinch 221a plate is equal to the speed of the upper belt device 209 and the traveling speed of the web.

(4) The mechanism for forming perforations and the sandwich plate mechanism 211 are
The former is synchronized to form N perforations when the latter makes one revolution. This N is an integer number of sheets on the circumference of the circulation path on the surface of the sandwich plate.

(5) The radius of the sandwich plate mechanism 221 (from the center line of the shaft to the outer surface of the sandwich plate) is (a) the diameter of the core, (b) the diameter of the shaft,
(C) Including the thickness of the fixing plate, it must be large enough to fit them.

Within the above design criteria, for example, the circumference of the circulation path on the surface of the sandwich plate is suitable to be 57.2 cm (22.5 inches) {5 x 1
1.4 cm (4.5 inches / sheet)}. According to this, the number of finished log sheets is a multiple of 5 (95, 135, 215, etc.).

FIGS. 2-5 show that just before the core is inserted into the core insertion nip 208, the line of adhesive on the surface of the core occurs in a very short time between picking up the web and starting winding.

In the winding device operating at 3000 FPM, the time required from FIGS. 3 to 5 is only 15 milliseconds.

(1) First, the core having the line of the adhesive reaches the core insertion nip 208. The core insertion nip 208 is adjusted to be smaller than the diameter of the core to hold the core firmly.

(2) Next, the core is firmly sandwiched in the core insertion nip 208, and the upper belt device 20 moves at the web speed in the same direction as the surface of the rotating nip forming lower roll 206.
Moved at web speed through the nip with 9 belts.

(3) Then, the core rolls toward the fixed plate 217 and reaches the second web sandwiching point B. Here, although the upper portion of the core receives a rotational force by the belt of the upper belt device 209, the lower portion of the core is separated from the surface of the lower roll 206 for forming the nip and is received by the stationary fixing plate 217. The above-mentioned first web sandwiching point momentarily presses the web towed downstream to the fixed plate 217 to stop the movement of the web. As a result, the web located between the first web nipping point A that feeds the web downstream while nipping the web and the second web nipping point B that stops the web is tensioned, and the perforation lines located between the two points Is broken at.

(4) After that, the core rotates on the fixing plate 217, and when the line of the adhesive comes to the position of about 6 o'clock of the core in FIG. 5, the adhesive picks up the web and the winding starts. The radial acceleration of the web and adhesive when picking up is 1/4 of that of the conventional winder. The web behind the core (the left side of the adhesive in contact with the web in the figure) continues to be fed, causing some slack in the web (zero tension). This action continues until the web is first wound around the core.

(5) The core, which has been initially wound on the web, rapidly rolls into the nip 223 of the two cooperating belt devices 209 and 210, with the upper and lower intervals being slightly widened in the direction of travel of the web. The nip 223 is formed by the roll 214 on the upstream side of the lower belt device 210 and the upper belt device 209. Here, the horizontal movement of the winding belt is substantially slowed down, the winding by the "double belt" begins, and the winding is indicated by the symbol in the figure.
It is a place that can be continued until it is completed at 207.

At a speed of 3000 FPM, the time required for the core to reach the 12 o'clock position with respect to the upstream roll 214 (nip 223) of the lower belt device is only about 63 milliseconds {about 9
6.5 cm (38 inches) web}. The concept of transporting and breaking the web in this way has several advantages.

(1) The web folded back at the core causes both layers of the two-layer web to be caught together and folded in the opposite direction, resulting in a high speed (3000 FPM) progression of the two-layer web.

(2) When the adhesive line of the core reaches the 6 o'clock position, that is, when the core presses the adhesive onto the web and transfers the web to the core, the adhesive must overcome to transfer the web. The radial acceleration is very small compared to the conventional winding device.

(3) The core presses a line of adhesive onto the web three times before the first winding is complete.

By comparison: (a) In a conventional center winding device, the transfer pad presses the web against the adhesive only once.

(B) In the winder described in US Pat. No. 4,327,877, the core presses the adhesive against the web only twice.

(4) The lines of adhesive on the core span the full width of the web for the best possible transport of the web. In comparison, in conventional winders, adhesive such as narrow rings that cover less than half the web width are applied to the core.

(5) After the web is cut, during the initial rotation of the core until the adhesive line reaches the 12 o'clock position, the winding device does not remove the entire perforated web. . This causes the web to experience low tension (substantially zero) for only a short time. Therefore, the adhesive need not be such that its adhesive force overcomes the web tension, and the web initially wound on the core will be somewhat loose and wrinkled.

The above can be said to be a minor drawback. However, it can be justified in that the machine need not be complicated. afterwards,
The integrated web and core form a nip 223 intermediate the running portion of the upper belt device 209 and the upstream end of the lower belt device 210.
To move forward.

(6) All steps are independent of the core diameter.

Also, the embodiment of FIG. 1 can include unique features not previously used. In order to directly control the winding tension, a dancer roll can be arranged between the perforation forming machine and the winding mechanism.

Further, there are various modifications to this new double belt surface winder.

(1) The sandwich plate mechanism 221 is omitted. Although this omitted device does produce logs reliably, it has unacceptable qualitative drawbacks.

(A) The number of sheets per log changes by ± 5 sheets.

(B) Separation occurs at two or more different perforation lines, leaving uneven and uneven back ends on the log.

(C) The rear end rewound on the core has a length of about 5 sheets.

(D) In the case of a two-layer web, the two layers are cut at different perforation lines.

(2) The sandwich plate mechanism 221 is omitted, and a double flexible blade perforator that makes one very weak perforation line per winding cycle is used instead of the normal perforation forming machine (perforator). .

Then, after a very weak perforation has passed through the transfer nip, the core is inserted into the nip approximately 5.1 to 7.6 cm (2 to 3 inches).

(3) For products without perforations, the sandwiching plate mechanism 221 is omitted, and one perforation line is created for each winding cycle. So, after the perforations pass through the transfer nip, 5.1
Inserting the core into the nip is about 7.6 cm (2-3 inches).

Features and Advantages of the Embodiment of FIG. 1 (1) All movements and actions are continuous and stable without a cam, crank, indexer, or similar device, and rotation is performed.

(2) LPM reaches 60 and FPM reaches 3000 or more.

FIG. 8 shows another embodiment of the present invention.
An inner cycloid core supply device 218 is used in a conventional surface winder of No. 4,327,877 type.

In the winding device 301 shown in FIG. 8, two rolls 311, 314 and 1 are used.
Winding is performed by the cooperation of a cluster of three rolls of one rider roll 324.

The web is cut off by the cooperation of the winding upper roll 311 and the fixing plate 317. This is almost the same operation as shown in FIG. 4, and the core momentarily sandwiches the web with respect to the fixed plate 317 at the second web sandwiching point B, and the winding body 307 immediately before becoming a log is wound. A first web pinch point A is formed where it contacts the downstream surface of the picking upper roll 311.

The same operation can be performed by the main part of the winding device 300 of the embodiment shown in FIG. 8A.

In the figure, the cradle roll for winding is the same as that of FIG. 8, but a large fixing plate 417 is provided. As a result, the lower roll 206 for forming the nip is omitted.

Further, FIG. 9 shows an ordinary core feeding device 501 used in the surface winding device of the present invention having the upper and lower belt devices 209 and 210. The core supply device 501 has an articulated arm 502, which is a pivot arm 503.
The core moves from the pickup portion of the core to the adhesion portion of the adhesive to the nip portion while being controlled by

(Effects of the Invention) As described above, according to the present invention, when the web is wound around the core and thickened up to the wound body immediately before the log, and a new core is fed upstream of the traveling path of the web, This core is the first
The web is momentarily stopped at the web pinching point, while the second web pinching point located on the downstream side of the web advancing path continuously feeds the web with the web sandwiched between the winding bodies. The web between the points becomes tense and breaks neatly at the perforation just located between the sandwich points.

While the web progresses to the position where it becomes a log, the web stops only at that spot for a moment when the above-mentioned new core is loaded, but as a whole, it progresses as it is at a predetermined speed, so the web winding It can be taken at high speed.

[Brief description of drawings]

FIG. 1 is a side view showing an outline of a surface winding device according to an embodiment of the present invention, and FIGS. 2 to 5 are enlarged outline views of a central part of FIG. The drawing is a plan view schematically showing line 6-6 of FIG. 1, FIG. 7 is a schematic view of the drive system of the winding device of FIG. 1, and FIG. 8 is an internal cycloid core supply device. FIG. 9 is a side view showing an outline of a surface winding device according to another embodiment of the present invention, FIG. 9 is an explanatory view of main parts of a surface winding device according to another embodiment of the present invention, and FIG. It is a side view which shows the outline at the time of applying a different core supply device to a double belt winder in the surface winder which concerns on another Example of this invention. 200,301,300 …… Web winding device 203 …… Perforator punching machine 206 …… Nip forming lower roll 209 …… Upper belt device 207 …… Roller 208,223 …… Nip 210 …… Lower belt just before becoming a log Device 211 …… Upstream winding roll of upper belt device 214 …… Upstream winding roll of lower belt device 217,317 …… Fixing plate 218 …… Core handling device 221 …… Pinching mechanism 221a …… Pinching plate A …… 1st web sandwiching point B ... 2nd web sandwiching point W ... Web C ... Core P ... Perforation

Claims (6)

[Claims] 1. A web winding method for continuously forming logs by winding a web having breaking perforations formed at intervals in the longitudinal direction on a rolling series of cores. Is provided with a first web sandwiching point at a downstream position of the passage that is advanced while being wound by the core, and a second web sandwiching point is provided at an upstream position of the passage. When the perforation is located between the web sandwiching point and the second web sandwiching point, at the second web sandwiching point, the winding roll and the fixing plate arranged at a position facing the winding roll. The core inserted between and presses the web advancing on the fixed plate against the fixed plate instantaneously to stop the progress of the web instantaneously,
At the same time, the first web sandwiching point sandwiches the web between the second web sandwiching point and the wound body immediately before becoming the log, and feeds the web to the wound body. The web between the web sandwiching point and the second web sandwiching point is tensioned to break at the perforations, and the broken web end on the downstream side of the passage is wound around the winding body, A web winding method, characterized in that the broken web end portion on the upstream side of the passage is wound around the fixed core on the charging core that has started rolling. 2. A web winding device for continuously forming a log by winding a web having breaking perforations formed at intervals in the longitudinal direction on a rolling series of cores. , In this frame, the web advances while being wound by the core, and has a first web pinching point at the downstream position,
A web passage having a second web pinch point at an upstream position, a winding roll rotatably attached to the frame in the web passage, and a winding roll that is close to the winding roll and is new to the winding roll. A fixing plate fixed to the frame at an interval such that the core is received, and the first web pinch point and the second web pinch point are wound in the web passage immediately before becoming the log. The second web sandwiching point is formed by a member which is located between the winding body and the second web sandwiching point and which feeds the web to the winding body with the web sandwiched between the winding body and the second winding body sandwiching point. Formed by the core and the fixed plate that is put between the winding roll and the fixed plate,
When the core is momentarily stopped by pressing the web advancing on the fixed plate against the fixed plate momentarily, and when the core is newly inserted, these first web pinching point and second web pinching point A web winding device, characterized in that the web between the points is tensioned by the points and the web is broken at the perforations located between the points. 3. The web winding device according to claim 2, wherein the unit length of each sheet of the web divided by the perforations is set to be equal, and the first web pinch point and the second web sandwiching point are set. The web winding device is characterized in that the distance between the web and the sandwiching point is set shorter than the length of the two sheets. 4. The third web according to claim 3 or 4, wherein the first web sandwiching point is formed by the cooperation of the wound body and the surface portion immediately before the log is formed. A web winding device according to the item. 5. The web winding device according to claim 4, wherein the surface portion is a surface of a cradle roll. 6. The web winding device according to claim 4, wherein the surface portion is a surface of a winding roll.