JP2002034829A - Method and equipment for forming wet towel sheet roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably form a wet towel sheet into wet towel rolls and speed up the roll forming operation, in a method and equipment for forming the wet towel sheet such as an unwoven cloth sheet into wet towel rolls. SOLUTION: This equipment comprises a first roller belt mechanism 28 wherein a rough surface belt 28-3 is wound between a pair of rollers, and a second roller belt mechanism 30 wherein a rough surface belt 30-3 is wound between a pair of rollers. The first and second roller belt mechanisms 28 and 30 are disposed face to face with each other, forming a wet towel sheet processing path 32 which is tapered from one end towards the other end between the opposite faces of the belts. On the opposite faces of the belts 28-3 and 30-3, the speed of the belt 28-3 moving in a direction from the entrance to the exit as shown by an arrow g1 is higher than that of the belt 30-3 moving from the exit to the entrance as shown by an arrow g2. A wet towel sheet 14 is formed with a core at the leading edge at the entrance of the processing path, and then is rolled between the opposite faces of the belts moving the opposite directions g1 and g2 while being passed through the processing path 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for forming a roll from a towel sheet such as a nonwoven sheet.

[0002]

2. Description of the Related Art Various methods have been proposed for forming a towel by forming a roll from a towel sheet such as a non-woven fabric sheet. However, the roll forming principles employed in these methods are basically the same. A moving belt having a roughened surface and a fixed belt are provided so as to face each other, a squeezed sheet is introduced to the facing surface between the moving belt and the fixed belt, and the core of the winding is formed by folding by inserting a sheet pile or the like. And the speed difference between the moving belt and the fixed belt causes the roll winding to grow in accordance with the movement of the moving belt around the core at the end of the towel sheet. Regarding the arrangement relationship between the moving belt and the fixed belt in the prior art, see, for example, Japanese Patent Publication No. 4-5081.
Please refer to No. 9.

[0003]

In the conventional method, the moving rough surface is opposed to the fixed rough surface, and the leading end of the towel sheet is introduced between the facing rough surfaces to form a nucleus for winding, and thereafter the wrapping is performed around this nucleus. Was like that. In the method in which the moving rough surface and the fixed rough surface are opposed to each other, the tip of the towel sheet tends to slide during nucleation, and if the nucleation fails once, the towel sheet comes out as it is and is likely to be defective.

[0004] The roll formation of the towel sheet is obtained by the speed difference between the opposing rough surfaces, and the roll formation speed = the production speed is in principle proportional to the speed difference. Also,
The greater the difference in speed, the shorter the distance required to complete the roll winding, which is advantageous in terms of miniaturization of the apparatus. However,
In the prior art, since the moving belt and the fixed belt are opposed to each other, the speed difference is equal to the speed of the moving belt in principle. Therefore, in the prior art, the rotational speed of the moving belt had to be increased in order to increase the production speed, but there was a limit to the increase in the speed of the moving belt alone, and this was a bottleneck to the increase in the production speed.

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a novel roll forming method and apparatus capable of more reliably performing roll formation and further increasing the roll forming speed.

[0006]

According to the first aspect of the present invention, there is provided a processing passage formed between opposed rough surfaces, a towel sheet is introduced into the processing passage, and the towel sheet introduced into the processing passage is provided. Forming a core of entrainment at the tip, one of the opposing surfaces moves at a predetermined speed toward the outlet direction, the other of the opposing surfaces moves at a lower speed than the predetermined speed toward the inlet direction, and the opposing rough surface A method of forming a roll of a towel sheet is provided, wherein the towel sheet is moved toward the exit while being rolled about the core by the movement in the opposite direction.

[0007] The function and effect of the invention of claim 1 will be described. The towel sheet is introduced from the inlet side of the processing passage,
A nucleus is formed by folding the leading end of the introduced towel sheet. In the processing passage,
One surface of the towel sheet contacts one of the opposing rough surfaces moving toward the outlet at a high speed, and the other surface contacts the other rough surface moving toward the inlet at a low speed.
Therefore, a nucleus of entanglement is formed at the leading end of the towel sheet, and entanglement occurs around the nucleus, so that the roll can be grown at a stretch. Since the opposing rough surface is moving in the opposite direction, one of the opposing rough surfaces moving toward the exit at a high speed has the same moving speed as the conventional one, but the other of the opposing rough surfaces is stationary. Since the difference in speed between the opposing rough surfaces is large in comparison with the above, the roll growth speed is larger than in the prior art, so that there is an effect that the production speed can be increased. Also,

[0008] According to the first aspect of the present invention, the movement of the opposite rough surface in the opposite direction is more effective for the material of the squeezed sheet than the conventional method of rolling between the moving rough surface and the fixed rough surface. Regardless, there is an effect that a stable roll formation can be performed. That is, conventionally, if the sheet slides on the fixed surface facing the moving surface, the nucleation may fail and the sheet may come out as it is, but in the present invention, the belt in the opposite direction to the feeding direction is always in the nucleation direction. Even if slippage occurs at one time due to movement in the (rounding direction), nucleation is always performed even if the nucleation start position is shifted because continuous nucleation operation is working In addition, since the nucleation start position may be shifted, the desired roll forming operation can be secured even if the setting such as the distance between the moving belts is rough, and the material of the towel sheet can be secured. A stable roll formation can be performed without selecting a roll.

According to the second aspect of the present invention, in the first aspect of the invention, the towel sheet is substantially in a non-tension state when the towel sheet is introduced into the processing passage, and the end of the towel sheet is on one side. A method of forming a roll of a towel sheet, characterized in that the one of the opposing faces is brought into almost simultaneous contact with the other of the opposing faces on the opposite face side, thereby causing nucleation at the leading end of the towel sheet. .

[0010] The function and effect of the second aspect of the present invention will be described. In the non-tension state, the leading end of the towel sheet is almost simultaneously contacted with the opposing surface moving in the opposite direction, so that the entrance end of the towel sheet is hooked. An entrainment is caused. When the hook-like wrapping progresses a little, the toweling sheet is formed of non-woven fabric, etc., so that pressing on from both sides causes fiber entanglement on the non-woven fabric sheet mutual contact surface in the hook-shaped portion. The mutual contact surfaces of the towel sheets in the part are integrated and can form the core of the roll winding there. Therefore, a guide and a sheet pile are not required for forming the nucleus, and the process can be simplified.

According to a third aspect of the present invention, in the first aspect of the present invention, a rotation guide is provided so as to face the one of the opposing surfaces moving toward the outlet at the entrance of the processing passage, The towel sheet is introduced in a substantially tension-free state so as to intersect one of the opposing surfaces from just before the rotation guide, and is passed between the rotation guide and one of the opposing surfaces to form a leading end of the towel sheet. The present invention provides a method for forming a roll of a towel sheet, characterized in that a nucleus is formed by folding.

The function and effect of the third aspect of the present invention will be described. The towel sheet in a non-tension state is first introduced into the rough surface moving at high speed from the cross direction, and a speed difference is given at the rotation guide, so that the towel sheet is provided. A nucleus is formed due to the entanglement of the opposing fiber layers of the toweling sheet at the portion folded and folded at the tip. Then, the nucleus formed at the leading end of the towel sheet by the continuation of the movement of one of the opposing surfaces (high-speed moving surface) rides over the rotation guide, and the towel sheet is contacted on one side by the rough surface moving at high speed toward the exit, and on the opposite side. In this case, the towel sheet is contacted with the rough surface moving at a low speed in the opposite direction, whereby the towel sheet is rolled around the core. According to the third aspect of the present invention, since the nucleus formation is performed only by installing the rotation guide, the process is not so complicated, and the same operation and effect as in the second aspect can be obtained.

According to the fourth aspect of the present invention, the first roller / belt mechanism in which the rough belt is wound between the pair of rollers and the second roller / belt mechanism in which the rough belt is wound between the pair of rollers. And a first and second roller / belt mechanism are arranged to face each other, whereby a towel sheet processing path extending from one end to the other end is formed between the opposing belt surfaces. The first and second roller and belt mechanisms are arranged such that the opposing belt surfaces are in opposite directions and that the speed of one of the opposing surfaces moving in the outlet direction is faster than the other of the opposing surfaces moving in the inlet direction. An apparatus for forming a roll of a towel sheet, comprising a driving means for driving.

The operation and effect of the fourth aspect of the present invention will be described. The first and second roller / belt mechanisms form opposing rough surfaces which move in opposite directions, and the opposing rough surfaces extend in the direction of the outlet. A similar speed that one of the moving speeds is faster than the other of the moving speeds in the inlet direction, and the roll forming of the towel sheet is caused by the same operation as described in the method of claim 1, whereby the roll forming speed can be increased. effective. In addition, since the rotation speed itself of the roller / belt assembly forming the rough surface on the high-speed side moving toward the outlet does not need to be increased, the durability of the device may be slightly deteriorated although the roll formation speed itself increases. Absent. Also,
Since the roll is grown by moving the opposing rough surface in the opposite direction, the belt length can be shortened even if the roll amount of the toweling sheet is the same as the conventional one, which can contribute to downsizing of the apparatus. .

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic overall configuration of a towel sheet forming apparatus according to the present invention. Reference numeral 10 denotes an original roll of a towel sheet such as a non-woven sheet, and an original roll 10 has a paper tube. Is mounted on the spindle 12,
With the rotation of the spindle 12, the towel sheet 14 is fed from the raw roll 10.

A pair of water supply rollers 16 are arranged so as to sandwich the towel sheet 14 between the generatrix lines. The water supply roller 16 has irregularities 18 having a sawtooth cross section on its outer peripheral surface. The irregularities 18 having a sawtooth cross section extend in the axial direction of the water supply roller 16. A water supply pipe 20 is installed facing the outer periphery of the water supply roller 16, and water containing a necessary chemical such as a disinfectant is supplied from the water supply pipe 20. The blade-shaped unevenness 18 is transmitted in the longitudinal direction, is evenly distributed in the longitudinal direction of the water supply roller 16, and can be held by surface tension. The water held on the surface of the water supply roller 16 is applied to the towel sheet 14 at a portion P where both rollers 16 are in contact with the towel sheet 14 therebetween.

The cutter 2 is located immediately downstream of the roller 16.
A towel sheet cutting device composed of 2 and a concave die 24 is arranged. The cutter 22 is a fixed length towel sheet 14
Is operated each time is supplied to cut the toweling sheet 14 into a predetermined length.

The towel forming apparatus is represented by 26 in its entirety and comprises a first roller / belt mechanism 28 and a second roller / belt mechanism 30. The first roller / belt mechanism 28 includes an entrance roller 28-1, an exit roller 28-2, and a rough belt 28-wound in a loop between the entrance roller 28-1 and the exit roller 28-2. 3 Rough surface belt 28-3
As shown schematically in FIG. 2 and subsequent figures, the surface has irregularities, so that it is possible to enhance the catching property of the towel sheet 14 formed of a nonwoven fabric and contribute to reliable roll formation.
Similarly, the second roller / belt mechanism 30 has an entrance roller 30-1, an exit roller 30-2, and a rough surface wound in a loop between the entrance roller 30-1 and the exit roller 30-2. Belt 30
-3. The first roller / belt mechanism 28 rotates clockwise (arrow f1), and the second roller / belt mechanism 28 rotates in the clockwise direction (arrow f1).
The belt mechanism 30 is rotating counterclockwise (arrow f2). As shown in the figure, the opposing surfaces of the rough belts 28-3 and 30-3 are inclined with respect to each other. As a result, the towel sheet processing passage 32 which is expanded downward (from the entrance to the exit) is formed between the opposing surfaces. It is formed. The rough surface belt 28-3, which is one surface forming the towel sheet processing path 32, moves at a high speed from the entrance to the exit of the towel sheet processing path 32 as indicated by an arrow g1, and the other side forming the towel sheet processing path 32. The rough surface belt 30-3 moves in the opposite direction at a low speed from the exit to the entrance of the squeezed sheet processing passage 32 as indicated by an arrow g2. The towel sheet 14 is wound into a roll while passing through the towel sheet processing path 32 as described below.

In FIG. 1, reference numeral 34 denotes a cradle for receiving the completed towel.

Next, the operation of forming the towel roll in the first embodiment will be described.
The toweling sheet 14 fed from the water supply roller 16 is appropriately supplied with water by a water supply roller 16 and cut into a predetermined length by a cutter 22. The timing of this cutting can be immediately before the leading end 14A of the towel sheet 14 arrives at the towel forming apparatus as shown in FIG. Since the toweling sheet 14 is cut, the toweling sheet 14 is in a free falling state for a moment, but the lower end 14A of the toweling sheet 14 comes into contact with the rough surface belt 30-3 which moves backward to the inlet side with an arrow g2 as shown in FIG. There, it is stopped once and urged in the backflow direction,
On the other hand, the toweling sheet 14 is also in contact with the rough surface belt 28-3 that moves forward at a high speed as shown by the arrow f1. Therefore, in the next stage, the end of the towel sheet 14 is bent in a U-shape as shown in FIG. Combined with the fact that the toweling sheet 14 is not under tension due to non-restriction, the bending of the tip of the toweling sheet 14 proceeds further in a V-shape, and as shown in FIG. Leads to. Since the toweling sheet 14 is made of a nonwoven fabric, contact between the opposing surfaces at the bent portion of the toweling sheet causes entanglement of the fibers and is integrated. Once such an integrated portion is formed, the towel sheet is in contact with the opposing surfaces of the rough belts 28-3, 30-3 that move in the opposite directions g1, g2, The roll of the squeezed sheet 14 is rapidly performed with the portion serving as a nucleus. Thereafter, as shown by the imaginary line in FIG. 5, the roll diameter gradually increases, and when the winding of the towel sheet is completed, the roll sheet is dropped from the processing passage 32 toward the roll receiving table 34 as shown in FIG.

Even if the rotational speed of the first roller / belt mechanism 28 on the high-speed side is made the same as the conventional one by the movement of the facing surfaces of the rough belts 28-3, 30-3 in the opposite direction, the second on the low-speed side The roll forming speed can be increased by the rotation speed of the roller / belt mechanism 30, and the productivity can be improved.

In the present invention, the movement of the opposing rough surface in the opposite direction performs a stable roll formation regardless of the material of the squeezed sheet 14 as compared with the conventional method of rolling between the moving rough surface and the fixed rough surface. There is an effect that can be. That is,
Although various types of toweling sheets are available, most of them are (a) composite sheets in which a polyethylene sheet is interposed between papers such as towel paper and hot embossed with irregularities. (B) Mixed nonwoven fabric of rayon and polyester, (c) rayon nonwoven fabric, and (d) air-laid nonwoven fabric. The material of (a) has good confounding properties, but other than that, the confounding properties are not necessarily high.
Therefore, it is necessary to make the mesh coarse or to make the fibers swell. However, in the conventional method in which the moving rough surface and the fixed rough surface are opposed to each other, the material is slippery, so that the nucleus is hardly triggered, and a roll forming error is likely to occur. In addition, delicate settings such as the distance between the moving belt and the fixed belt for nucleation were required. On the other hand, in the present invention, the opposing rough surface is moving in the opposite direction, and the belt in the direction opposite to the feeding direction always moves in the nucleation direction (rounding direction), so even if slippage occurs at one point, Since the continuous nucleation operation is working, even if the nucleation start position is shifted, nucleation can always be performed eventually, and since the nucleation start position may be shifted, Even if the setting such as the distance between belts is rough, the desired roll forming operation can be ensured, and the method is excellent in that the material of the toweling sheet is not selected.

In the above-described roll forming operation, it is important that the toweling sheet 14 is in a relaxed and untensioned state at the time of nucleation in order to cause entanglement between the fibers. Therefore, in the above embodiment, the toweling sheet is used. 14
Cutter 2 immediately before the lower end 14A of the
2, the toweling sheet 14 is cut. However, immediately after the lower end 14A of the towel sheet 14 reaches the roll forming area, the towel sheet 14 by the cutter 22 is used.
In this case, the feeding speed of the towel sheet 14 from the raw fabric roll 10 is higher than the towel sheet taking-up speed by the towel forming device 26 (the rotation speed of the roller / belt mechanisms 28 and 30). Feed. Towel forming device 2 by overfeed
Since the tension of the towel sheet to the towel sheet 6 becomes smaller, nucleation at the tip of the towel sheet can be performed smoothly.

In the above-described first embodiment, the device for vertically introducing the towel sheet without tension into the processing passage 32 formed by the inclined opposing rough surface for forming the core of the roll winding at the leading end of the towel sheet is devised. You are. Therefore, a conventional reciprocating sheet pile is not required for nucleation, and there is an advantage in that the configuration is simplified and the cost is reduced.
However, nucleation using a reciprocating sheet pile (for example, see Japanese Patent Publication No. 2-25607) is also optional for carrying out the present invention. That is, when using a sheet pile, a sheet pile is provided at the entrance of the processing path 32 formed by the facing belt, and the sheet pile is advanced by moving the sheet pile toward the processing path with respect to the leading end of the introduced towel sheet so that the front end of the sheet is moved. After the core is formed by bending, the sheet pile is retracted, and thereafter, the roll formation centering on the core can be advanced by moving the opposing belt in the opposite direction.

FIG. 6 shows another embodiment, in which the first belt 128 moving at a high speed and the second belt 1 moving at a low speed.
30. A processing passage 132 is formed between the opposing surfaces of the belts 128 and 130 and expands from the entrance to the exit. The processing passage 132 is arranged substantially horizontally. The toweling sheet 14 is in a tensionless state or a low tension state (a).
The lower end thereof abuts on the high-speed belt 128 as shown in FIG. A rotation guide 40 is provided slightly downstream of the towel sheet supply section so as to face the high-speed belt 128.

As shown in FIG. 6B, the tip of the towel sheet 14 carried in the direction of arrow h1 by the high-speed belt 128 is the second stage of the roll formation.
The tip is bent by abutting on zero. Third
Stage (c) shows a state in which the bending of the tip is further advanced and becomes a nucleus.

In the fourth stage (d) of the roll formation, the bent towel sheet portion slips through the rotation guide 40, so that the portion between the opposing belts 130 and 132 that move in the opposite directions h1 and h2 thereafter. Roll winding proceeds.

[Brief description of the drawings]

FIG. 1 is a view schematically showing an entire towel forming apparatus according to a first embodiment of the present invention.

FIG. 2 schematically shows the roll winding forming apparatus in the apparatus shown in FIG. 1, and shows a first stage in the roll formation.

FIG. 3 shows a second stage (earlier stage of nucleation) in roll formation by the roll winding forming device.

FIG. 4 shows a third stage (late stage of nucleation) in roll formation by the roll winding forming device.

FIG. 5 shows a fourth stage (roll growth) in roll formation by the roll winding forming device.

FIG. 6 is a view showing a roll winding forming apparatus according to a second embodiment of the present invention and each step of roll formation by using the apparatus (a).
It is the schematic which shows from (d).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Raw material roll 14 ... Towel sheet 16 ... Water supply roller 20 ... Water supply pipe 22 ... Cutter 24 ... Die 26 ... Towel formation device 28 ... First roller and belt mechanism 28-1 ... Inlet roller 28-2 ... Outlet roller 28 -3 rough surface belt 30 second roller / belt mechanism 30-1 inlet roller 30-2 outlet roller 30-3 rough surface belt 32 processing passage 34 towel cradle 40 rotating guide 128 First belt 130 Second belt 130 132 Processing path

Claims (4)

[Claims] A processing path formed between the opposing rough surfaces, a squeezing sheet introduced into the processing path, a nucleus of entanglement formed at a leading end of the squeezing sheet introduced into the processing path, and One moves at a predetermined speed toward the exit direction, the other of the opposing surfaces moves at a lower speed than the predetermined speed toward the entrance direction, and rolls the towel sheet around the core by moving the opposing rough surface in the opposite direction. A method of forming a roll of a towel sheet, characterized in that the roll is moved toward the exit while being rotated. 2. The invention according to claim 1, wherein the towel sheet is substantially in a state of no tension when the towel sheet is introduced into the processing passage, and an end of the towel sheet is opposite to the one of the opposing surfaces on one side. A method for forming a roll of a towel sheet, wherein the other side of the towel sheet is brought into almost simultaneous contact with the opposite side, thereby forming a core of a roll at the leading end of the towel sheet. 3. The invention according to claim 1, wherein a rotation guide is provided at an entrance of the processing passage so as to face the one of the opposing surfaces moving toward the exit direction, and the towel sheet is substantially absent. It is introduced in a state of tension so as to intersect the one opposing surface from just before the rotation guide, and passes between the rotation guide and the one opposing surface to form a core by folding the leading end of the towel sheet. A method of forming a roll of a towel sheet, wherein the roll is formed. 4. A first roller / belt mechanism having a rough belt wound between a pair of rollers, and a second roller / belt mechanism having a rough belt wound between a pair of rollers. Wherein the first and second roller and belt mechanisms are disposed opposite to each other, thereby forming a towel sheet processing passage extending from one end to the other end between the opposing belt surfaces;
The first and second roller and belt mechanisms are arranged such that the opposing belt surfaces are in opposite directions and that the speed of one of the opposing surfaces moving in the outlet direction is faster than the other of the opposing surfaces moving in the inlet direction. An apparatus for forming a roll of a towel sheet, comprising a driving means for driving the towel sheet.