JP2013112469A - Web winding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a web winding machine which does not cause wrinkles on a roll product.SOLUTION: This web winding machine winds up a web W on a paper core c in a winding space 4 surrounded by a first drum 1, a second drum 2, and a third drum 3. The web winding machine includes a gluing mechanism 30 for applying a glue onto the paper core, and a paper core input mechanism 40 for inputting a paper core into the winding space. The gluing mechanism 30 applies the glue a onto the outer peripheral surface of the paper core c circumferentially through a restricted length. The paper core input mechanism 40 inputs the paper core so that the non-coated area of the outer peripheral surface of the paper core c on which the glue a is not applied is brought into contact with the first drum 1. When the paper core c is input by the paper core input mechanism 40, the paper core c starts to rotate after the paper core is brought into contact with the first drum 1. However, since the glue a comes into contact with a web on the first drum 1 after the paper core starts to rotate, a variation does not occur circumferentially in positions where the glue is adhered to the web W, and the glue is adhered uniformly. Consequently, wrinkles do not occur on the web W, and the wound state of the web is neatly finished.

Description

  The present invention relates to a web winder. A web, which is a base paper for toilet paper or kitchen roll, is made by a paper machine and wound on a large-diameter roll paper, and then rolled back to a roll paper having a size suitable for work in the subsequent process by an unwinder. Then, embossing is applied to the web that is unwound from the unwinder as necessary, and it is wound around the product diameter of the toilet paper or kitchen roll with a web winder, and the paper end of the roll is fixed by gluing, etc. Log. When this log is cut into product lengths and packaged, a roll product is obtained. The present invention relates to a web winder used in such a process.

  The basic configuration of the web winder is as described in Patent Document 1, and the configuration will be described with reference to FIG.

A space surrounded by the three winding drums 111, 117, and 118 is a winding space, and the web W is wound around the paper tube c placed in the winding space and wound up on a log. Go.
The web W is introduced into the winding space along the rotating drum 111. The paper tube c is inserted into the guide plate 116 with glue applied immediately before the start of winding of the web W, and is fed into the winding space after the web W is adhered to the paper tube c with glue. The log L that has reached a predetermined winding diameter is separated from the subsequent web and discharged along the ramp 110.

By the way, in the winding machine, a paper tube c is used for the core of the web W, and paste is applied to the paper tube c, and the web W at the beginning of the winding is bonded.
There are two patterns for applying the glue. As shown in FIG. 10A, the glue a is applied so as to extend in the axial direction of the paper tube c (see FIG. 6 of Patent Document 2). And as shown to (B) of the figure, there exist some which apply the glue a to the circumferential direction of the paper tube c (refer FIG. 12 of patent document 2).

However, when the glue a in FIG. 10A is applied in the longitudinal direction of the paper tube c, there is a problem that the glue a is consumed in large quantities.
When the glue a in FIG. 10B is applied around the paper tube c in the circumferential direction, the amount of glue consumed is not large, but wrinkles are generated on the inner periphery of the finished roll product, and the product is wound. There is a defect that makes it look bad.

The cause is as follows.
As shown in FIG. 9, in the initial state where the web W starts to be wound around the paper tube c, the drum 111 is rotating, but the paper tube c is stationary. Then, after the paper tube c comes into contact with the back surface of the drum 111 (specifically, the front surface of the web on the drum 111), the paper tube c also starts to rotate and winds the web W.
At the moment when the paper tube c starts to come into contact with the web W, it starts to come into contact with the web from the upper surface of the coating thickness of the glue a, so that the shape of the glue a transferred to the web W as shown in FIG. It has a pointed triangle shape, and the apexes of the triangle do not align with the horizontal line and are somewhat uneven (the lines P1 and P2 indicate a difference in positional deviation).

As soon as the glue a comes into contact with the web, it penetrates into the web structure and softens the web, but there are variations in the positions P1 and P2 at which the glue a starts to contact, and the web W becomes softer and still hard parts are mixed. When it reaches the state, drought occurs and grows greatly.
For this reason, as shown in FIG. 11 (b), wrinkles that easily catch on the eyes of the consumer are generated on the inner periphery of the roll product R, thereby reducing the commercial value.

Japanese Patent Laid-Open No. 2003-276917 Japanese Patent Laid-Open No. 2001-247237

  In view of the above circumstances, an object of the present invention is to provide a web winder that does not generate wrinkles in a roll product.

The web winder according to the first aspect of the present invention includes a first drum introduced in a state in which the web is wound, a second drum for supporting the log being wound from below, and a third drum for pressing the log being wound from above. A web winder that winds a web around a paper tube in a winding space surrounded by a gluing mechanism that applies glue to the paper tube and a paper tube loading mechanism that feeds the paper tube into the winding space And the gluing mechanism applies glue in the circumferential direction and a limited length on the outer peripheral surface of the paper tube, and the paper tube feeding mechanism applies glue on the outer peripheral surface of the paper tube. The non-application area | region which has not been performed is thrown in so that it may contact with the said 1st drum.
The web winder according to a second aspect of the present invention is the web winding machine according to the first aspect, wherein the gluing mechanism rotates the paper tube horizontally moved by the moving mechanism and the paper tube horizontally moved by the moving mechanism. It comprises a rotating means composed of an upper roll and a lower roll, a rotation speed controller for controlling the rotation speed of the upper roll and / or the lower roll, and a glue supply unit for adhering glue to the surface of the lower roll. And
In the web winder according to a third aspect of the present invention, in the first or second aspect, the paper tube feeding mechanism includes a holding unit that holds the glued paper tube, and a grip or release of the paper tube on the holding unit. And a moving means for moving the paper tube on the holding portion to a position in contact with the first drum.
In the web winder of a fourth invention according to the second invention, the glue supply section comprises a glue tank storing glue, the lower roll immersed in the glue in the glue tank, and the glue adhered to the lower roll. It is characterized by comprising a doctor that removes the excess of.

According to the first aspect of the present invention, the paper tube is glued in the circumferential direction with a length limited to the outer periphery by the gluing mechanism, and the paper tube having the non-glued area in this way is loaded by the paper tube feeder. In doing so, the first drum is brought into contact with the non-applied area of the glue. The paper tube begins to rotate after contact, but since the glue contacts the web on the first drum after it begins to rotate, there is no difference in speed, so there is little difference in the circumferential direction of the glue on the web. There is no variation in the film, and it adheres uniformly. For this reason, wrinkles do not occur on the web, and the wound form is finished beautifully.
According to the second aspect of the present invention, the paper tube is moved horizontally by the moving mechanism, and is sandwiched between the upper roll and the lower roll of the rotating means, and the rotational speed of the upper roll and the lower roll is adjusted, so When the time is controlled, the paste can be applied with a limited length in the circumferential direction on the outer peripheral surface of the paper tube.
According to the third invention, when the paper tube placed on the holding portion is clamped, the paper tube is not rotated, and is moved to a position where it contacts the first drum by the moving means. The area can be brought into contact with the first drum and the paper tube can be rotated without changing the glue application shape.
According to the fourth aspect of the invention, it is possible to apply the glue with a simple configuration in which the lower roll is immersed in the glue tank, and it is possible to apply an appropriate amount of glue because excess glue can be removed by the doctor.

It is a side view of the web winder concerning one embodiment of the present invention. It is an enlarged side view of the gluing device shown in FIG. It is a partial front view of the gluing device shown in FIG. FIG. 4 is a partially enlarged view of FIG. 3. It is a perspective view of the paper tube c to which the glue a was apply | coated with the gluing device. It is a side view of the paper tube feeding mechanism shown in FIG. It is structure explanatory drawing of a paper tube injection | throwing-in mechanism. FIG. 6 is an explanatory diagram of a state of contact between the paper tube c and the web W. It is explanatory drawing of the basic structure of a web winder. It is explanatory drawing of the pasting pattern to the conventional paper tube. It is explanatory drawing of the problem of a prior art.

Next, an embodiment of the present invention will be described with reference to the drawings.
The basic configuration of the web winder according to the present invention will be described with reference to FIG.
1 is a first drum to be introduced in a state in which the web W is wound, 2 is a second drum for supporting a log being wound from below, and 3 is a third drum for pressing the log being wound from above. A winding space 4 is formed by the drums 1, 2, and 3.
No. 5 feeds the web W with a feed roll.
The first drum has a vacuum box 1a inside and sucks the web W. A guide plate 6 curved in an arc shape is installed below the first drum 1, and the inserted paper tube c is guided and moved to the winding space 4.
A cutter roll 7 cuts the web W on the first drum 1 to a predetermined length.

  The web W is supplied from above in the figure, wound around the feed roll 5, wound around the first drum 1, and sent to the winding space 4. In the winding space 4, the web W is wound around the paper tube c, and when the web W is rolled up to a predetermined product diameter, the web W is cut by the cutter roll 7 and the log L is discharged. The starting end of the cut web W is held by the vacuum box 1a of the first roll 1 and moves toward the take-up space 4, during which a new paper tube c is inserted and rolled on the guide plate 6. It moves to the winding space 4 while moving. During this time, the starting end of the web W is adhered to the outer periphery of the paper tube c being glued, and the subsequent web W is wound around the outer periphery of the paper tube c.

In the web winder of the present embodiment, the paper tube c supply equipment 10, the lateral movement mechanism 20, the gluing mechanism 30, and the paper tube loading mechanism 40 are arranged on the right side in FIG.
The paper tube supply facility 10 includes a supply guide 11 for the paper tube c and a feeder 12 for dropping the paper tubes c one by one from the lower end portion thereof.

  A lateral movement mechanism 20 is disposed below the feeder 12 and below the cutter roll 7. The lateral movement mechanism 20 includes a pair of chain sprockets 21 and 22, a chain 23 wound around the chain sprockets 21 and 22, and a flight 24 attached to the chain 23. The flight 24 is two push rods, and receives the paper tube c dropped from the feeder 12 between them and sends it from the right side in the figure to the left side in the figure.

The gluing mechanism 30 will be described with reference to FIGS.
The gluing mechanism 30 includes a gluing wheel 31 disposed below and a support roll 32 disposed above.
The gluing wheel 31 has a large-diameter wheel 31a attached to the support shaft 31b at equal intervals, and is rotated by a drive source such as a motor 31c.
The support roll 32 has large diameter rolls 32a and frictional members such as rubber rings 32b attached thereto, and is rotated by a drive source such as a motor 32c. If the rubber ring 32b is attached, it is not necessary to hold the paper tube c with the full width of the wheel 31, and the paper tube c can be rotated by partial contact, so that it can be rotated with a small driving force.

The motor 31c and the motor 32c are connected to a rotational speed control 33 so that the speed can be individually controlled.
The chain 23 for moving the paper tube c laterally passes through the space between the adjacent wheels 31 a, 31 a, and the paper tube c passes between the gluing wheel 31 and the support roll 32 while riding on the chain 23. Is done.

The gluing wheel 31 is immersed in the glue tank 35, and the glue tank 35 contains a liquid or viscous paste a.
Further, a doctor 36 is attached to the glue tank 35, and the tip of the doctor 36 is in contact with the outer peripheral surface of the gluing wheel 31 and a side surface thereof with a slight gap so that excess glue a is scraped off. It has become.

Both the gluing wheel 31 and the support roll 32 rotate counterclockwise, but the rotation speed controller 33 controls the rotation speed of the gluing wheel 31 to be slightly faster than the rotation speed of the support roll 32. The paper tube c passes on the gluing wheel 31 while rotating a little. Since the paste a is transferred from the gluing wheel 31 during the rotation, as shown in FIG. 5, the paste a extending in a length limited to the circumferential direction is applied to the outer peripheral surface of the paper tube c.
Further, since the applied paste a is a portion that contacts the gluing wheel 31, it is applied with a gap in the axial direction of the paper tube c.

  Since the motor 31c and the motor 32c are connected to the rotational speed controller 33 as described above, the rotational speeds of the gluing wheel 31 and the support roll 32 can be freely changed, and the gluing wheel 31 and the support roll 32 can be freely changed. By changing the rotation speed ratio, the length of the glue a to be glued can be adjusted freely.

Next, the paper tube feeding mechanism 40 will be described with reference to FIG.
The paper tube feeding mechanism 40 includes a swing arm 41, a clamp claw 42, and a cam 43.
The swing arm 41 is connected to the support shaft 41a and is swung by a rotation mechanism (not shown). Further, a holding portion 41 b that scoops and holds the paper tube c is formed at the tip of the swing arm 41.
The swing arm 41 constitutes a moving means referred to in the claims.

  The clamp claw 42 is pivotally attached to an appropriate position of the swing arm 41 by a pin 42a at a base end portion, and a cam roller 42b is attached to an intermediate portion. A tension spring 42c is attached between the distal end side of the cam roller 42b and the base of the swing arm 41.

The cam 43 opens and closes the clamp pawl 42 between the clamp position and the release position, and is fixed coaxially with the swing arm 41. The cam shape of the cam 43 is generally disk-shaped and has a radius. The first cam portion 43a having a large radius and the second cam portion 43b having a small radius.
The tension spring 42c is provided to force the cam roller 42b to come into contact with the first cam portion 43a and the second cam portion 43b of the cam 43 to ensure the opening and closing operation of the clamp pawl 42.

  The feeding operation of the paper tube c is performed by scooping the paper tube c between the flights 24 in the open state on the sprocket 22 of the lateral movement mechanism 20, bringing the paper tube c into contact with the first drum 1, and the guide plate 6 is performed by the swinging motion of the swinging arm 41.

A second guide plate 44 is provided between the vicinity of the sprocket 22 and the guide plate 6 in order to smoothly perform the paper tube c loading operation. A receiving portion 44a on which the paper tube c pushed by the flight 24 is placed is formed at the distal end portion (right end in the figure) of the second guide plate 44. From the receiving portion 44a to the connecting portion with the guide plate 6 is formed. A curved guide portion 44b is formed.
Note that the paste a is applied to the lower surface of the paper tube c that has entered the receiving portion 44a.

Next, the operation of the paper tube feeding mechanism 40 will be described with reference to FIG.
(1) Before gripping Since the holding portion 41b of the swing arm 41 is located below the receiving portion 44a of the second guide plate 44, and the cam roller 42b is in contact with the second cam portion 43b, the clamp pawl 42 is opened. Yes. At this time, the glue a adhering to the paper tube c is in the lower position.
(2) Clamp The swing arm 41 swings counterclockwise, the paper tube c is put on the holding portion 41b, and the clamp pawl 42 moves clockwise as the cam roller 42b rides on the first cam portion 43a, and the paper Clamp tube c.

(3) Movement The swing arm 41 swings counterclockwise with the paper tube c clamped.
At this time, the glue a adhering to the paper tube c is displaced from the lower position to the horizontal position (right direction in the figure).
(4) Release When the swing arm 41 further swings counterclockwise, the cam roller 42b falls into the second cam portion 43b, and the clamp pawl 42 moves away from the holding portion 41b.
As a result, the paper tube c starts to rotate in contact with the first drum 1 and at the same time rolls out of the holding portion 41 and is released at the entrance of the guide plate 6.

The state when the paper tube c is loaded will be described in detail with reference to FIG.
FIG. 8 shows the same state as (4) of FIG.
The glue a adhering to the paper tube c is the lateral position on the right side in the figure. The paper tube c starts rotating after coming into contact with the surface of the first drum 1, and moves to the winding space 4 (see FIG. 1) while winding the web W while rolling on the guide plate 6 to the left in the drawing. Go.
As shown in the drawing, at the moment of contact with the first drum 1, there is an opening of an angle θ between the contact point T1 with the first drum 1 and the adhesion position T2 of the glue a. This angle θ is usually about 70 ° to 120 °.

As shown in the figure, when the paper tube c starts to rotate, the glue a is still located at the rear of the paper tube c in the rotation direction, so that the web W on the first drum 1 suddenly contacts the glue a and is strong. There is no friction. For this reason, the problem that the shape of the glue a is disturbed in a triangular shape and the tip positions are not aligned horizontally (see FIG. 11A) does not occur.
Actually, the glue a comes into contact with the upper portion W on the first drum after the paper tube c is rotated by the angle θ. After the paper tube c starts to rotate, the speed difference from the first drum 1 does not occur or is small even if it occurs, so that the application shape of the glue a is not disturbed.

  If the web starting end wound around the paper tube c as described above is adhered to the uniform shape of the glue a, the portion where the adhesive is adhered and the portion not adhered in the width direction of the web starting end, No wrinkles occur between the part with a large amount of glue and the part with a small amount of glue.

  Then, when the log L is rolled up to a predetermined diameter, it is discharged from the winding space 4, but this operation is not different from the known technique. Since the log wound as described above does not have wrinkles at the beginning of the inner circumference of the log, the web W wound around the outer layer can be wound without wrinkles. For this reason, a beautiful log product with a rolled shape is completed.

DESCRIPTION OF SYMBOLS 1 Drum 2 Drum 3 Drum 4 Space 20 Lateral movement mechanism 30 Gluing mechanism 31 Gluing wheel 32 Support roll 35 Glue tank 36 Doctor 40 Paper pipe feeding mechanism 41 Oscillating arm 42 Clamp claw 43 Cam

Claims (4)

Paper in a winding space surrounded by a first drum to be introduced in a state in which the web is wound, a second drum for supporting a log being wound from below, and a third drum for pressing the log being wound from above A web winder that winds a web around a tube,
It has a gluing mechanism that applies glue to the paper tube and a paper tube loading mechanism that loads the paper tube into the winding space.
The gluing mechanism is for applying glue in a circumferential direction and a limited length on the outer peripheral surface of the paper tube,
The web winder is characterized in that the paper tube feeding mechanism feeds a non-coating area where no paste is applied on the outer peripheral surface of the paper tube so as to contact the first drum. The gluing mechanism is
A lateral movement mechanism for moving the paper tube laterally;
Rotating means composed of an upper roll and a lower roll by rotating the paper tube horizontally moved by the moving mechanism from above and below,
A rotational speed controller for controlling the rotational speed of the upper roll and / or the lower roll;
2. The web winder according to claim 1, further comprising a glue supply unit for adhering glue to the surface of the lower roll. The paper tube feeding mechanism is
A holding unit for holding the glued paper tube, a clamp for gripping or releasing the paper tube on the holding unit, and a moving means for moving the paper tube on the holding unit to a position in contact with the first drum The web winder according to claim 1 or 2, characterized by comprising: The glue supply unit includes a glue tank storing glue,
3. The web winder according to claim 2, comprising the lower roll immersed in the glue in the glue tank, and a doctor for removing an excess of glue adhering to the lower roll.

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