JPH0776064B2 - How to make coreless toilet paper rolls - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a coreless toilet paper roll. As shown in FIG. 8, a toilet paper R currently widely available on the market uses a paper tube c as a core and a web wound around the core. The paper tube c is a rigid paper for paper tube base paper formed in a pipe shape. Since this paper tube c does not dissolve in water, it must be collected and cleaned up after the toilet paper is used up, which is considerably inconvenient in many places such as hotels and hospitals. Therefore, the inventor of the present invention has eagerly developed a coreless toilet paper roll wound in a roll shape with only a web without using a paper tube. This coreless toilet paper roll R has a web W as shown in FIG.
A hollow portion h having a diameter of about 30 to 40 mm into which a core rod (having a diameter of about 20 to 35 mm) of a toilet paper holder is inserted is formed in the center by winding only the hollow.
This coreless toilet paper roll R is convenient because no cleaning is required after it is used up. The present invention relates to a method for producing a coreless toilet paper roll R as shown in FIG.

[0002]

2. Description of the Related Art In the coreless toilet paper roll R, as shown in FIG. 7, several rolls of the innermost layer Di are used instead of the core, so that the core is tightly wound and the strength is high. Must be large. Otherwise, the tension when the outer layer portion Do is wound acts as a compressive force inward in the radial direction, crushes the cavity h, and cannot be used as a toilet paper roll.

In addition, in addition to this, as a coreless toilet paper roll, paper is wound so that only minute pores are formed at the center of the roll, and a thin solid (for example, a diameter of about 5 to 10 mm) is used. There are a small number of types in which the core rod is forcibly inserted into the fine pores to be attached to the holder, but the present invention is intended for toilet paper rolls having only the fine pores at the center of the roll. And not. This is because a toilet paper roll having only micropores does not pose a problem in use even if the micropores are crushed. Therefore, the coreless toilet paper roll which is the object of the present invention means one having a large central cavity into which the replaceable core rod of the thick shaft which is most frequently used can be inserted into the center of the roll.

[0004]

At present, the manufacturing technology of the coreless toilet paper roll R is currently under research and development, and there has been no known publicly known technology. As a result of earnest research, Figure 7
It has succeeded in imparting sufficient strength so that the web itself having several windings of the innermost layer, Di, can be used as a core. Also,
When the web itself is used to form the core, if the innermost layer is adhered, the entire length of the web cannot be used as toilet paper after it is made into a product. In other words, it is uneconomical because when you try to unwind the toilet paper to the end, it breaks and you cannot use it.
Also, from the viewpoint of resource saving, it is preferable that the toilet paper can be used to the end.

In view of the above circumstances, the present invention uses the innermost layer of web as a core, whereby the central cavity is firmly maintained and does not lose its shape, and moreover, the entire web can be used as toilet paper until the end. It is intended to provide a method for manufacturing a paper roll.

[0006]

A method of manufacturing a coreless toilet paper roll according to the present invention comprises a paper feed processing part for feeding a web from a raw roll, performing paper processing if necessary, and feeding the web to a winding part. , A winding part for winding a web on a winding shaft to produce a coreless toilet paper roll, the winding part having two drive rolls and a rider roll arranged above the drive roll. while the winding shaft which has stick wound is rotated in the drive roll, you have use a winding machine and to wind the web onto a winding shaft by pressing down the web on the winding shaft in a rider roll, winding initial step As a result, the starting end of the web is wound on the winding shaft for several rolls in a dry state, and then the subsequent web is wound for several rolls while spraying water, and then the web is wound in a dry state as the winding main step. Diameter In the winding initial step, the paper winding speed of the winding part is made faster than the paper feeding speed of the paper feeding processing part, and the pressing contact pressure of the rider roll is reduced, When the winding main step is started, the pressing contact pressure of the rider roll is increased and then decreased as the winding diameter of the web increases.

[000 7 ]

In the present invention, in the initial winding step, water is sprayed on the web to temporarily contact the web with the winding shaft so that the web can be wound securely. In this case, the web of the portion that has been sprayed with water stretches, but while the wet web is being wound, the paper winding speed of the winding part is faster than the paper feeding speed of the paper feeding processing part, The innermost web can be tightly wound without loosening. Since the contact pressure of the rider roll is reduced in the initial winding step, the webs that have been sprayed with water become semi-glued and adhere to each other to complete the product, then unwind the paper to the end. When you try to use it, you can avoid the inconvenience that it breaks and you can not use it. After entering the winding main process from the initial winding process, the contact pressure of the rider roll is once increased, so the inner layer side is wound tightly, and then the net contact pressure is gradually reduced as the winding diameter increases. As it goes, the web is wound more loosely on the outside of the roll. Therefore, it is possible to obtain a coreless toilet paper roll in which the innermost layer of the roll is strong and the central cavity is not crushed, and the entire web can be used to the end.

[ 08 08 ]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 6 shows a typical winding machine currently used, and the mechanical parts thereof can be roughly classified into a paper feeding processing part A and a winding part B.

[00 09] a paper feed processing Part A, is a paper by a paper machine, feeding the web W normal diameter from the original fabric roll Ro, which was wound up in 800~2000m / m, subjected to a paper if necessary processing take-up The part supplied to Part B. There are various types of paper processing such as embossing processing, perforation processing, and crepe processing that are added in the paper feeding processing part A, and these processing mechanisms are appropriately incorporated in the paper feeding processing part A. In the illustrated embodiment, 23 is an embossed portion, 21 is a perforated portion, and 22 is a guide roll.

[001 0] The winding part B, winding the web W onto the winding shaft 1, a section for producing a centerless toilet paper roll R, only shows the most important parts in the drawings. That is, the winding part B is mainly composed of the two drive rolls 2, 3, the rider roll 4, the nip roll 5, and the like. In the winding part B, the drive rolls 2 and 3 are rotated to wind up the web W fed on the winding shaft 1, and the rider roll 4 compresses the web W on the winding shaft 1. , I try to get a toilet paper roll with an appropriate hardness.

[001 1] Next, with reference to FIG. 1, the winding Part B
Will be described in detail. This figure shows a state in which the web W starts to be wound, and the web W is fed to the winding shaft 1 through a space between the entrance drive roll 2 and the nip roll 5, and then a space between the drive roll 2 and the cutter 6. Has been. The winding shaft 1 is placed between two driving rolls 2 and 3 which are arranged in parallel in a horizontal plane and a rider roll 4 which is vertically movable above the driving rolls 2 and 3. The web W is wound around the winding shaft 1 by the rotation of.

[001 2] The rider roll 4 is adapted to lift and tuned to support the both ends in the rack and pinion mechanism, the lifting force is received from the air cylinder 30. A supply line 33 connected to an air source is connected to the piston rod side chamber 31 of the air cylinder 30, and an electropneumatic converter 34 is interposed in the middle of the supply line 33. The electro-pneumatic converter 34 is a pressure control valve that increases or decreases the air pressure on the inlet side based on an electric signal and discharges the air pressure from the outlet side. Also air cylinder 3
A discharge line 35 is provided in the piston side chamber 32 of 0,
A throttle valve 36 is interposed in the discharge conduit 35 and the supply conduit 33.

[001 3] to the electropneumatic converter 34 sensor 37 for detecting a web winding diameter on the reel 1 is connected via a controller 38. Any sensor may be used as the sensor 37 as long as it can detect the winding diameter. For example, a sensor that detects the amount of movement of the rack and pinion mechanism to which the rider roll 4 is connected is used. The detection value of the sensor 37 is converted into a control signal predetermined by the controller 38 to increase or decrease the supply pressure to the air cylinder 30. And the atmospheric pressure is applied to the piston side chamber 32 of the air cylinder 30,
When the supply pressure p to the rod-side compartment 31 is increased, the own weight of the rider roll 4 is more offset, and the pressing contact pressure (hereinafter referred to as touch pressure P) is decreased. On the contrary, when the supply pressure p is decreased, the rider rolls. Since the self-weight offset of the roll is reduced, the touch pressure P can be increased.

[0014] The winding axis 1 is preferably those capable of stretching the outer diameter in the radial direction, for example, the winding shaft according to the actual Hei 4-31754 JP is preferably used. With such a winding shaft 1, the winding shaft 1 can be removed from the roll without breaking the roll shape after the winding of the web W is completed.

[001 5] original fabric roll Ro is usually a width of about 1000
The web has a wide width of 2000 mm, and the cutter 6 slits it into a small width, for example, a 114 mm width defined by the JIS standard. Therefore, a plurality of cutters 6 are arranged on the side of the entrance drive roll 2 and along the axial direction thereof. Therefore, since it is wound around the winding shaft 1 in a slit state, a plurality of paper rolls R to be toilet paper are manufactured at one time on one winding shaft.

In [001 6] 9 nozzle, in winding the initial step of the web W, it is to spray the water in a mist form. This nozzle 9
The mounting position of is a position where water can be sprayed from between the entry side drive roll 2 and the rider roll 4 toward the winding shaft 1.

Next, a winding method using the winding machine will be described with reference to FIGS. First, as shown in FIG. 1, the winding the Ri provisionally the beginning Wa of the web to the winding axis 1, for example 50c
After winding about m m, mist-like water m is sprayed from the nozzle 9 as shown in FIG. 2, and during this period, winding is continued, and for example, a length of about 50 cm is wound and wound. Thus, the web W and the winding shaft 1 and the initial winding layers of the web are temporarily adhered to each other so that the web W can be securely wound around the winding shaft 1. The process up to this point is the initial winding step.

[00 18] Next, go to the take-up this process, to stop the spraying of the nozzle 9, will take up the web W of the dry state, go to fatten its diameter. Then, as shown in FIG. 3, a predetermined winding diameter (for example, 110 to 120 m specified by JIS)
m) When reaching, stop winding. Of course, at this stage, a plurality of slits (usually 1
0 to 20 paper rolls R are in a wound state.

[00 19] After that, fed by the kicker (not shown) in a state in which the paper roll R has been completed the winding from between the drive rolls 2 and 3 winding axis 1 is attached to the receiving roll 7 shown in FIG. 1 . In FIG. 1, the output side drive roll 3
In the figure, an air pipe 10 and a knife 8 are arranged on the left side, and the receiving roll 7 is installed on the left side. The tail end of the paper roll R sent to the receiving roll 7 and having completed winding is cut in the width direction by the knife 8 and glued at several places at the same time. After that, when the receiving roll 7 is rotated and the tail end is rolled up, the tail seal is made by the glue previously attached. On the other hand, high-pressure air is blown out from the air pipe 10, and the right web (dotted line) Wa cut by the knife 8 is wound around the new winding shaft 1 loaded between the driving rolls 2 and 3. Then, the web W is wound around the new winding shaft 1 in the same order as described above.

[002 0] Figure 4, the supply pressure p to the air cylinder 30
3 is a graph showing the relationship between the touch pressure P and the touch pressure P. In the case of this embodiment, the touch pressure P generated by the own weight of the rider roll 4 is
If, is inversely proportional to the supply pressure p, a that decreases as larger winding diameter wound initially as shown in FIG. 4 increases.

[002 1] Note that refers to Figure 4, the supply pressure p in the range of low pressure 0.5~1kg / cm ^2, high pressure 4～5Kg /
The value is set in the range of cm ² , but this changes depending on the weight of the rider roll 4 and the touch pressure to be applied, and the value is not limited to the above value and may be set to an optimum value. Further, although the supply pressure p and the touch pressure P are linearly changed, the supply pressure p and the touch pressure P may be changed in a curved manner or in a stepwise manner without being limited to this.

[002 2] Now, in the process of the present invention, the above-mentioned winding process
During this period, the touch pressure P of the rider roll 4 is as follows.
Controlled. 5, (I) is a graph of paper winding speed, (II) is a graph of touch pressure P, (III) is a graph of air supply pressure p, and in FIG. 5 (I), T1 is the initial winding process. In the first half, the time to wind the starting end Wa of the web W on the winding shaft 1 for several windings in a dry state (see FIG. 1), T2 is the number of the webs W sprayed with water on the winding shaft 1 in the latter half of the winding initial step. It is a winding time (see FIG. 2).

The [002 3] The method of the present embodiment, in the winding initial step, to lower the touch pressure P, (II see figure), instead winding part B cigarette paper feed processing speed Sb preparative Part A
The paper feed speed Sa is slightly higher than that. By doing so, tension acts on the web W wound around the winding shaft 1, so that even if the touch pressure P is low, the innermost layer of the roll R can be tightly wound, while the touch pressure P is low. The web W moistened with water sprayed from it did not get bonded due to radial compression (which has high surface pressure), and after it became a product, I tried to untie the toilet paper to the end. Sometimes, it has the advantage that it can be used without breaking. In addition, in order to lower the touch pressure P, the air supply pressure p to the air cylinder 30 may be increased as described above (see FIG. III).

[002 4] Once in the take-up this process finished the take-up initial step,
Lower the air supply pressure p and increase the touch pressure P (II, I
For the speed control, the paper winding speed Sb and the paper feeding speed Sa may be the same for the speed control. It should be noted that the rising speed increasing region V1 of the entire winding machine and the region where the paper winding speed Sb is high coincide with each other, but there may be some deviation.

[002 5] winder is gradually increased progressively the winding diameter between the roll R operating at constant speed area V2, but during this time, continue to the progressively smaller touch pressure P. This tendency may continue in a wired manner until the winding is completed, or may be a polygonal line as shown in the drawing. It may also be changed in a curve. It is sufficient if the touch pressure P tends to decrease as a whole. Then, at the end of winding, the entire winding machine is decelerated and stopped at the end, but in this deceleration region V3, the paper winding speed Sb is
And the paper feed speed Sa may be the same, or there may be some speed difference. For example, the paper winding speed Sb is changed to the paper feeding speed S
It may be a little faster than a.

[002 6] As described above, in the present embodiment, by winding the initial step speed control, the control touch pressure in winding this step, wrapped soft tightly wound outside the innermost layer of the roll R, the central cavity You can avoid crushing,
Moreover, it is possible to obtain a toilet paper roll that can be used until the end.

[ 27 ]

According to the present invention, a coreless toilet paper roll can be obtained in which the innermost layer of the roll is strong and the central cavity is not crushed, and moreover, all the webs can be used to the end.

[Brief description of drawings]

FIG. 1 is a side view of a main part of a winding machine used in a manufacturing method of the present invention.

FIG. 2 is an explanatory diagram of a winding initial step.

FIG. 3 is an explanatory diagram of a winding book step.

FIG. 4 is a graph showing the relationship between air supply pressure and touch pressure .

FIG. 5 is a graph (I) of speed control, a graph (II) of touch pressure, and a graph (III) of air supply pressure in the manufacturing method of the present invention .

FIG. 6 is an overall explanatory view of a winding machine used in the manufacturing method of the present invention.

FIG. 7 is a perspective view of a coreless toilet paper roll obtained by the production method of the present invention.

FIG. 8 is a perspective view of a general toilet paper roll with a paper tube.

[Explanation of symbols]

1 reel 2 drive roll 3 drive roll 4 rider roll 6 cutter 9 nozzle 30 air cylinder 34 electro-pneumatic converter 37 sensor 38 controller

Claims (1)

[Claims] 1. A paper feed processing part for feeding a web from an original roll, performing paper processing if necessary and sending the web to a winding part, and manufacturing a coreless toilet paper roll by winding the web on a winding shaft. It consists of a winding part
The winding part is provided with two drive rolls and a rider roll arranged above the drive roll, and the web on the roll is pushed by the rider roll while the roll around which the web is wound is rotated by the drive roll. lowered using winding machine was set to wind on the winding axis of the web, winding in reels of partial dry a web of starting on the winding shaft as a winding initial step, and then sprayed with water to a subsequent web While winding several rolls, the web is wound in a dry state until it reaches a predetermined diameter in the winding main step.In the initial winding step, the paper winding speed of the winding part is adjusted. It is made faster than the paper feed speed in the paper processing part, and the pressing contact pressure of the rider roll is reduced, and when the winding bookbinding step is entered, the pressing contact pressure of the rider roll is increased, and then the web is wound. As the diameter increases Core without toilet paper roll production method which is characterized by reduced gradually.