JP3250864B2 - Manufacturing method of roll paper for toilet - 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 roll paper for toilets, and more particularly to a method for producing a coreless roll paper having no core tube at the center.

[0002]

2. Description of the Related Art A hole for inserting a shaft of a roll paper holder provided in a toilet must be formed in the center of a toilet roll paper. by the way,
A conventional general toilet roll paper is formed by winding a web around a paper core tube, and the toilet roll paper with the core tube is manufactured as follows. That is, first, a web take-up machine, a wide web is wound around a long paper core by a predetermined length to form a long web wound body with a core, and then a roll cutting machine,
The roll paper with a core tube is manufactured by sequentially cutting the long web wound body with the core length by product length.

In recent years, a shaft body (generally referred to as an air shaft) which can be reduced in diameter and increased in diameter in the radial direction has been used.
After winding the web in a state where the diameter of the shaft is expanded, the diameter of the shaft is reduced (a gap is formed between the outer surface of the shaft and the inner surface of the hole of the roll paper). A method of manufacturing a coreless toilet roll paper without a core tube by extracting the roll paper from the hole of the roll paper is known (for example, see JP-A-4-55250). Further, in such a coreless roll paper, it is preferable that the shape of the center hole be kept as circular as possible because the axis of the holder is inserted into the center hole.

In the above-mentioned known method of manufacturing a coreless roll paper, in order to maintain the shape of the center hole of the roll paper in a circular shape, an aqueous solution containing an adhesive is sprayed onto a web winding start end while the web is wound. This is performed by winding the winding start end around the outer peripheral surface of the shaft body and bonding the webs that polymerize inward and outward with the aqueous solution. Also, if the web winding start end is bonded with an aqueous solution in this way, the web and the shaft are stuck together while the web winding start is wet, so even if the shaft is However, the shaft body cannot be pulled out properly, and therefore, the work of pulling out the shaft body is performed after the web winding start end is dried to some extent. The inner and outer polymerized webs at the start end side of the web are hardened to a hardness that can be used if the portion wetted by the aqueous solution is dried (the shape of the center hole of the roll paper is secured to the extent that it can be used). Is done).

[0005] In the manufacture of toilet roll paper, in a web winding step, a wide web is previously cut into product widths by a slitter, and then each narrow web is wound around a winding shaft. In a web winding step, a long web roll is wound as it is in a wide web to form a continuous web roll in the axial direction, and then the long web roll is sequentially cut by a roll cutting machine by a product length (for example, 114 mm). There is. In the former case (winding each narrow web that has been cut in advance by the product width), the web is cut by the product width at the same time as the web is wound. There is a problem that the end faces of the taken web rolls become irregular (a large number of small annular irregularities are formed), and the appearance is deteriorated. On the other hand, in the latter case (a long web roll is formed and then cut by a product length by a roll cutting machine), a cutting step of the long web roll is required after winding, but the end face of each product roll is There is a feature that it will be neatly aligned.

[0006]

However, in the above-mentioned general toilet roll paper with a core tube, the cost of the core tube portion is increased, and the core tube remains after the web is used. There was a problem that it took time to dispose because it could not be flushed in the toilet.

In the above-mentioned known method for producing a coreless roll paper (for example, disclosed in JP-A-4-55250),
Although a shaft (generally referred to as an air shaft) whose diameter can be reduced and increased in the radial direction is used, this shaft is very expensive, and the shaft is connected to the center hole of the roll paper. Since the aqueous solution attached to the vicinity of the web winding start end can be removed only after drying to some extent, the time for the drying (at least 30 days in natural drying)
(Approximately 40 minutes)), the shaft could not be used for the next web take-up, and the restraining time of the expensive shaft for drying was long. Further, in general, the web winding capacity in the web winding process is naturally much larger than the processing capacity obtained from the drying time of the web winding start end, and the number of shafts corresponding to the web winding capacity is required. However, there is a problem that considerably high equipment cost is required only for the shaft body. Further, in this known method of manufacturing a coreless roll paper, the web is wound around a shaft while being wound with a wide web, and after removing the shaft, a coreless long web roll is cut with a roll cutting machine. It is possible to cut the product length by length, but in such a long web roll in a coreless state, the center hole is made to adhere an aqueous solution to the web winding start end, and then the web winding start end Is simply dried and fixed, but has a certain shape-retaining property, but is not so strong in strength, and the web roll may be deformed by the pressing force in the roll radial direction applied at the time of cutting.

The present invention has been made in view of the above-mentioned conventional problems,
When manufacturing coreless roll paper, shorten the restraining time of the shaft that can be reduced and expanded in the radial direction so that expensive shafts can be handled with a small number, and the end surface of the product roll It is an object of the present invention to propose a method of manufacturing a toilet roll paper that can be cleaned and that does not deform a web roll during cutting.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a wide web is wound into a roll to form a long web wound body, and the long web wound body is sequentially cut by a roll cutting machine to obtain a product length. In the method for manufacturing a toilet roll paper which is cut in a step-by-step manner, the outer diameter of the toilet roll paper is substantially the same as the inner diameter of the center hole of the toilet roll paper, and is smaller than the axial length per product of the toilet roll paper. Multiple cores made of a tubular body that has a short length and is not deteriorated even when it comes into contact with water, and a diameter that can be reduced and expanded in the radial direction and is smaller than the hole diameter of the core when the diameter is reduced. And a long shaft having a diameter larger than the hole diameter of the core when the diameter is increased, and further, each core is provided outside the shaft, and a blade of a roll cutting machine passes between the respective cores. Insert one row after another with a small gap After that, using a winding shaft in which the shaft body is expanded in diameter and each winding core is fixed to the outside of the shaft body, when winding a wide web around the winding shaft, first, start winding the web. After the end is wound while spraying a liquid for bonding the web to a predetermined small length range of the web winding start end, a web of a product length is sequentially wound around the outside thereof, and a long web with a winding shaft is wound. A web winding step of forming a wound body, a shaft removing step of reducing the diameter of a shaft of a long web wound body with a winding shaft and removing the shaft from each winding core, and removing the shaft. A drying step of drying the liquid-attached portion of the removed long web winding body with a core by an appropriate method, and a small gap portion between the winding cores of the dried long web winding body with a core by a roll cutting machine. Cutting the web to form a short web wound with a core of product length, and winding the short web with a core of product length It is characterized by performing the coring process to remove disconnect the winding core from.

[0010]

The winding shaft used in the present invention has an outer diameter substantially the same as the inner diameter of the center hole of the toilet roll paper, and is slightly shorter than the axial length of the toilet roll paper per product. A plurality of cores formed of a tubular body having a length and not deteriorating even when in contact with water;
A shaft having a diameter that can be reduced and increased in the radial direction, and a plurality of winding cores fitted in a single row outside the shaft with a small gap therebetween. The body is expanded and used.
That is, in this winding shaft, when the diameter of the shaft body is increased in a state in which each core is fitted to the outside of the shaft body, the outer surface of the shaft body is pressed against the inner surface of each core, and each core is brought into contact with the shaft body. Is fixed outside.
At this time, each core is separated from the outside of the shaft body by a small gap (for example, a small gap of about 4 to 6 mm when the thickness of the cutter is 3 to 5 mm) such that the blade of the roll cutting machine can pass therethrough. They are inserted in a single row. When the diameter of the shaft body is reduced in the assembled state of the winding shaft, the outer diameter of the shaft body becomes smaller than the inner diameter of the core, and the shaft body can be removed from each core.

In the method for producing a roll paper for toilet according to the present invention, the above-mentioned winding shaft is used, and the web is wound through a web winding process, a shaft removing process, a drying process, a cutting process, and a core removing process. Roll paper is manufactured. In each manufacturing process, the following operation is performed.

[0012] web winding process at the web winding process supplies the winding shaft to the web winding section of the web winder, where it performs web winding action,
At this time, first, the web winding start end is wound around the core while spraying a liquid for web bonding onto the web winding start end, and then a web of a product length is wound around the outside thereof. A long web wound body with a mandrel is formed. As described above, in the web winding step, when the liquid is sprayed on the web winding start end, the webs wetted by the liquid adhere to each other. That is, a toilet web is mainly composed of highly hydrophilic cellulose, and when this web is polymerized in a state of being wetted with water, hydroxyl groups (OH
) Is changed so that the cellulose molecules are hydrogen-bonded and the webs are bonded to each other. The length range for spraying the liquid at the web winding start end is from when the web winding end ends, for example, once around the core, to when the web winding end ends around the core. This operation is continued until the sheet is wound twice (for example, about 3 to 5 times). In addition, the water that has wet the web at that time sequentially permeates and diffuses into the web that is polymerized inward and outward. In the web winding section, when a web of a product length is wound around the winding shaft, after separating the long web wound body from the web,
The long web wound body with the winding shaft is removed from the web winder.

In the shaft body removing step, the shaft body of the long web wound body with the winding shaft is reduced in diameter, and the shaft body is removed from each winding core. That is,
When the diameter of the shaft body is reduced, a gap is formed between the outer surface of the shaft body and the inner surface of each core, so that the shaft body can be removed from each core. , A long web wound body with a core is formed. This shaft removal operation can be performed while the vicinity of the web winding start end wound around the take-up shaft is still wet. The shaft is restrained for a relatively short time until the shaft removing step is completed. The shaft removed from the long web wound body with the winding shaft is assembled with a new winding core (to constitute a winding shaft), and is used in the web winding process sequentially.

Drying Step In this drying step, the liquid-attached portion of the long web winding body with a core is forcibly dried by warm air or the like, or left to stand for a predetermined time to be naturally dried. In addition, when forcibly drying with hot air, if the hot air is allowed to pass through a hole in the long web wound body with a core, the long web wound body is dried from the inside, so that the drying efficiency is improved. Get better. Then, when the vicinity of the web winding start end portion containing water is dried, the inner and outer polymerized webs in the swollen state are firmly fastened to each other in an adhesive state. In this state, the plurality of webs near the end of the web winding are tightly integrated to maintain a cylindrical shape, and furthermore, an adhesive action by moisture is formed between the inner surface of the cylindrical portion and the outer surface of the core. Is gone.

Cutting Step In this cutting step, for example, a roll cutting machine generally called a log cutter is used. This type of roll cutting machine sequentially feeds long web rolls by an intermittent feeder to a product length. Each time the long web roll advances one time, the disk blade, which revolves (or swings) around the axis while rotating, is moved down intermittently while moving forward one by one intermittently. The shawl web roll can be sequentially cut by the product length. By the way, a plurality of winding cores are arranged side by side in a row at a center portion of a long web winding body with a winding core to be cut in this cutting step. The core is later removed,
When cutting a long web wound body with a core, it is necessary to prevent the blade from contacting the core part. That is, in this cutting step, the blade is positioned so as to pass through a small gap between the respective winding cores in the long web winding body with the winding core. The web winding body at a small gap between the winding cores is cut. Also, the long web wound body with a core cut in this cutting step has high strength because each core is inserted in the center thereof, and is wound around the center of the web wound body at the time of cutting. Since the operation is performed with the core inserted, the web winding body is not deformed by the pressing force at the time of cutting. In addition, the short web wound body with a core cut in this way is
One core is inserted into the center of a short web roll of product length.

[0016] The coring process in this coring process, from the winding core with short web winding body,
The core is removed by, for example, a punching method. At the time of core removal, the central part of the web winding body is dry, and the webs near the web winding start end are fixed to each other in a tubular shape, and the inner surface of the web winding start end and the outer surface of the winding core are connected to each other. Can slide with respect to each other. Therefore, in this core removing step, the core can be easily removed by pressing the core in the axial direction against the web winding body. The core removed from the web winding body is carried to the web winding step and used repeatedly.

In the coreless roll paper manufactured in this manner, a relatively hard cylindrical portion is formed at the center, and a cylindrical hole is secured inside. In addition, in this coreless roll paper, the web of the tubular portion at the center can be unwound and used, and the web of the tubular portion is easily dissolved by immersing it in water. There is no problem.

[0018]

According to the method for producing a toilet roll paper of the present invention, the following effects can be obtained.

(1) A shaft (expensive) whose diameter can be freely reduced and increased in the radial direction is used as a winding shaft, and furthermore, at the time of web winding, the web winding start end is wetted with liquid. Even if the web is wound, a wide web is wound around the winding shaft to form a long web wound body with the winding shaft (with the web winding start end still wet). ), Since the shaft is reduced in diameter and the shaft is removed from each winding core, the time required for restraining the expensive shaft during the roll paper manufacturing process can be shortened, and the shaft can be used efficiently. The number of shafts can be reduced as much as possible (equipment cost can be reduced).

(2) In the long web wound body with a core obtained by removing the shaft from the long web wound body with the winding shaft, the blade of the roll cutting machine passes between the respective winding cores at the center. Since it has a small gap that can be made, it is possible to cut the long web wound body with a core by cutting the small gap part by product length, and as a final product, a coreless roll paper is used. Even if it is manufactured, the end faces of the product roll can be aligned neatly (a high-quality product roll can be manufactured).

(3) Since cutting is performed with the core inserted into the center of the long web wound body when cutting the long web wound body, the pressing force of the blade acts during cutting. Even if the web roll is not deformed, and the core is removed after cutting, the product is cut into lengthwise web rolls and cut by product length to produce a coreless web roll. Even if it does, the center hole of the web roll can be maintained in an appropriate state (circular cylindrical hole).

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 11. In the method of manufacturing a toilet roll paper according to this embodiment, a long shaft 21 and a plurality of cores 22, 2 are provided.
2 and .. are assembled to form a winding shaft 2 (FIGS. 1 to 4), and a wide web W is wound around the winding shaft 2 to form a long length with a winding shaft. A web winding step (FIGS. 5 to 6) for forming the web winding body S and a shaft body removing step for removing the shaft body 21 from the long web winding body S with a winding shaft (FIG. 7).
And a long web wound body T ₁ with a core with the shaft 21 removed.
Drying step (FIG. 8) for drying the liquid adhering portion (starting end of the web) of FIG.
₂ and a core removing step (FIG. 10) of removing the core 22 from the short web wound body U with a core, as shown in FIG. The coreless roll paper R is manufactured. Before describing the manufacturing method of this embodiment, the configuration of the winding shaft 2 and each device used in this embodiment will be described.

FIGS. 1 to 4 show a winding shaft 2 used in this manufacturing method. The winding shaft 2 includes a shaft body 21 whose diameter can be reduced and increased in the radial direction, and a plurality of winding cores 22 fitted outside the shaft body 21.

The core 22 has an outer diameter (for example, 30 to 50 mm) that is substantially the same as the inner diameter of the center hole of a commercially available toilet roll paper (product roll) R, and is provided for each product roll R. It is formed of a tubular body having a length slightly shorter than the length in the axial direction (for example, a length shorter by about 4 to 6 mm than the length of the product roll). The tube thickness of the core 22 is, for example, 1
A hole 23 having a considerably large diameter is formed at the center portion. The length of the core 22 is determined by the axial length of the product roll R to be manufactured. The general axial length of the product roll is 114 mm. At the time of manufacturing, the length of the core 22 is, for example, 108 to 11 shorter than the product roll length by about 6 to 4 mm.
Set to 0 mm. The reason why the length of the core 22 is slightly shorter than the length of the product roll to be manufactured is as shown in FIG.
When product length increments cutting a roll cutting machine 4 a winding core with long web wound body T ₂ as shown in, each winding core 22
This is to form a small gap A between which the blade 44 of the roll cutting machine 4 can pass (to be described in detail later). or,
The core 22 is formed of a material that does not deteriorate even when it comes into contact with water. The material of the core 22 is preferably a material having water resistance, such as metal, wooden, or synthetic resin, and having durability even when used repeatedly. It is also preferable to form a coating on the outer peripheral surface of the core 22 to facilitate the core removal (to make it slippery) during the core removal operation described later.

The shaft body 21 uses what is generally called an air shaft. This shaft 21 is shown in FIGS.
As shown in FIG. 4, movable bodies 25, 25,... (In the illustrated example, four in the circumferential direction) that protrude and retract in the radial direction from the outer surface of the cylindrical body 24 in the long (length of the number of products). ), And an elastic tube 26 whose diameter can be reduced and increased freely is installed inside the movable bodies 25.
The outer diameter of the cylindrical body 24 is formed slightly smaller than the inner diameter of the core 22 (about 2 to 4 mm smaller than the inner diameter of the core). A cap 27 having the same diameter as the outer diameter of the core 22 is fixed to one end (the right end in the illustrated example) of the cylindrical body 24 (hereinafter, this cap is referred to as a fixed-side cap). A cap 28 having the same diameter as the outer diameter of the core 22 is detachably fitted to the other end (left end) (hereinafter, this cap is referred to as a detachable cap). The fixed-side cap 27 is provided with an air supply port 29 with a valve 29 a for supplying high-pressure air from the compressor 30 into the elastic tube 26. A plurality of projections 25a, 25a,... Are formed on the movable bodies 25, 25,. Each projection 25a is exposed on the outer surface of the cylindrical body through a cutout formed in the cylindrical body 24.

The shaft 21 is connected to the elastic tube 2.
When the air in the tube 6 is evacuated to a low pressure state, the diameter of the elastic tube 26 is reduced as shown in FIG.
When the protruding width of the projection 25a becomes small, and high-pressure air is supplied into the elastic tube 26 to bring it into a high-pressure state, the elastic tube 26 expands in diameter as shown in FIG.
The projection width of the protrusion 25a of 25... In the state where the diameter of the elastic tube 26 is reduced (FIG. 3), each movable body 25, 25
The virtual circle connecting the outer surfaces of the projections 25a becomes smaller than the hole diameter of the core 22, so that the core 22 can be inserted (or removed) from the outside of the cylindrical body 24. Also, elastic tube 2
6 (FIG. 4), each movable body 25, 25... Is pressed outward in the radial direction, and each projection 25a, 25a.
Are brought into pressure contact with the inner peripheral surfaces of the respective winding cores 22, 22,... Fitted on the outside of the cylindrical body 24 from four places in the circumferential direction, whereby the respective winding cores 22, 22,. Becomes fixed outside. In the illustrated example, a total of six winding cores 22 are inserted into one shaft body 21 to take up the winding shaft 2.
However, the number of cores 22 used (the number of products taken) can be changed by changing the length of the shaft body 21.

The winding shaft 2 is assembled using an assembling jig 7 as shown in FIGS. The assembling jig 7 includes a predetermined number of cores 22 and 2 (in the illustrated example, a total of six).
.. Are supported in a single row, a gutter-shaped receiving base 71, a holding plate 73 for holding the cores 22, 22... Juxtaposed on the receiving base 71, and a vertical movement of the holding plate 73 )). On the upper surface of the receiving base 71, small projections 72, 72,... (Total of five places) for positioning the respective winding cores 22, 22,.

Then, the winding shaft 2 is assembled as follows. First, as shown in FIG.
Are arranged in a line with small gaps A, A,... Between them, the air cylinder 74 is reduced, and the cores 22, 22,. Keep it. Next, the holes 2 of the respective winding cores 22, 22,...
3, one end side of the shaft body 21 in the reduced diameter state (the detachable side cap 2).
8), the detachable cap 28 is fitted to the end of the shaft 21 (as shown in FIGS. 2 and 3). Then, as shown in FIG.
When the compressor 30 is operated in a state where is connected to the air supply port 29, high-pressure air is supplied into the elastic tube 26, and the movable bodies 25 move outward (the shaft body 21).
Are increased in diameter), and the respective winding cores 22 are fixed outside the shaft body 21. Even if the air nozzle 30a is subsequently removed, the air supply port 29 is closed by the valve 29a and the inside of the elastic tube 26 is maintained at a high pressure.
Therefore, the cores 22, 22,... Are kept fixed to the shaft body 21. After the assembly of the take-up shaft 2 is completed, the take-up shaft 2 can be removed from the pedestal 71 by opening the holding plate 73 upward by the air cylinder 74 as shown by reference numeral 73 '(FIG. 4). . Small gaps A are formed between the respective winding cores 22, 22 of the winding shaft 2 assembled in this manner, and the inner surfaces of the respective winding cores 22, 22,. Since the projection 25a is pressed,
The cores 22 do not move with respect to the shaft body 21. In order to release the fixed state of the cores 22, 22,..., As shown in FIG.
The high pressure air in the elastic tube 26 may be removed by opening the internal valve 29a.

The web winding machine 1 shown in FIGS. 5 and 6 supplies a wide web W unwound from a web roll V to a web winding section 12. Immediately before the web winding section 12, end cutting devices 11, 11 each of which is a disk cutter for cutting both ends Wa of the wide web W by small widths are provided. The web take-up part 12 is provided with guides 13 for positioning the take-up shaft 2 supplied thereto in the longitudinal direction. Further, the web take-up unit 1
The nozzle 2 is provided with a nozzle 14 for spraying a liquid for web bonding toward the vicinity of the winding shaft 2 supplied thereto.
The nozzle 14 is for adhering the liquid in a mist state to a predetermined length range of a web winding start end wound around the winding shaft 2. Further, an adhesive may be mixed into the liquid sprayed from the nozzle 14 as necessary.

When the web winding section 12 starts winding the web winding end of the wide web W around the winding shaft 2 in the web winding section 12, the web winding start end is connected to the nozzle 14. When a wide web having a product length is wound around the winding shaft 2, the winding operation is stopped and the long web with the winding shaft formed by the web winding portion 12 is wetted with the liquid sprayed from the web. After the wound body S is discharged to the temporary receiving portion 15, the web is cut by the cutting blade 17 of the web cutting device 16 and separated from the continuous web W, and at the same time, the cut end of the web wound body side is cut by a gluing device (not shown). It is adhered to the outer surface of the winding body (a long web winding body S with a winding shaft shown in FIG. 7 is formed). In addition, the separated long web wound body S with a take-up shaft is discharged onto the conveyor 18 and transferred to the next process side (the shaft body removal process side).

The shaft 21 is removed from the long web winding body S with the winding shaft formed by the web winding machine 1. The removal of the shaft is performed by removing the detachable cap 28. Thereafter (indicated by reference numeral 28 'in FIG. 7), for example, the valve 29a of the air supply port 29 is opened by the protruding needle 76 to reduce the diameter of the shaft 21, and the shaft 21 may be removed to the right. Incidentally, the shaft body 21 after抜外the center core with long web wound body T ₁ having a core 22, 22 remains. Further, in the core with long web wound body T _1, near the web winding start portion remains still wet.

As the drying means 3 used in the drying step,
In this embodiment, a dryer 31 that generates hot air (hot air) is used.
Is used. The dryer 31 is hot air the center hole of the core with long web wound body T ₁ (hole 23 of each winding core)
It is blown into the inside and forced to dry from inside. In another embodiment, the drying means 3 may be left in a natural state for a predetermined time (for example, about 30 to 60 minutes) to dry naturally.

The roll cutting machine 4 used in the cutting step includes:
As shown in FIG. 9, the intermittent feeding apparatus 40 for drying already winding core with long web wound body T ₂ successively product is advanced to a length at a time intermittently, disc-shaped, which revolves in the vertical plane while rotating The knife 44 is provided. The intermittent feed device 40 is configured to intermittently advance the pressing piece 42 by a motor (servo motor) 41 by a product length (symbol B) to be cut. The blade 44 revolves around the axis by the motor 43 while rotating, and each time the blade 44 moves down, the long web wound body T with a core is moved.
_The product is cut one by one sequentially from the tip side of ₂ . Further, at the time of cutting, blade 44 is set so as to pass through the small clearance A portion between the front and rear each winding core 22, 22 in the core with long web windings T _2. In addition, blade 4
4 is generally about 3 to 5 mm thick, and the small gap A formed between the winding cores 22 is slightly larger than the thickness of the blade (for example, 1 to 2 mm from the thickness of the blade). Large).

As shown in FIG. 10, the coring machine 5 used in the coring process includes a motor 52 that holds a holder 51 (six in total) for accommodating a short web wound body U with a core by an angle of 60 degrees.
Are rotated intermittently at a time, and the holders 51, 51,...
4, through the core pushing-out position 55 and the wound body discharging position 56, the winding is made to revolve to the original wound body receiving position 53. Then, one short web wound body U with a core is accommodated in the holder 51 at the wound body receiving position 53, and the core 22 is web wound by the first pusher 57 at the core small length extruded position 54. The core 22 is pushed upward by a small length with respect to the body R, the core 22 is pushed down from above by the second pusher 58 at the core pushing-out position 55, and the holder 51 is pushed by the third pusher 59 at the wound body discharge position 56. It is made to be discharged from. The present applicant has already filed a patent application (Japanese Patent Application No. 4-305541) for the coring machine 5.

Next, a method of manufacturing the roll paper for toilet according to the embodiment of the present invention will be described using the above-described winding shaft 2 and various devices (drying means 3, roll cutting machine 4, core removing machine 5). .

As shown in FIGS. 1 to 4, the winding shaft 2 is constructed by assembling a plurality of winding cores 22, 22,... A small gap A slightly larger than the thickness of the cutting tool 44 of the roll cutting machine 4 is generated between the cores 22, 22,.
.. Are fixed to the shaft body 21 by expanding the diameter of the shaft body 21.

The web take-up section 12 in the web take-up machine 1
As shown in FIG. 5, a wide web W
And one winding shaft 2 is supplied onto the web winding unit 12. When the web winding start end is wound around the winding shaft 2, this is performed while uniformly spraying a liquid for web bonding from the nozzle 14 onto the web winding start end. The timing of spraying the liquid from the nozzle 14 is such that spraying starts when the end of the web winding has been wound once around the winding shaft 2, and the end of the web winding starts at the winding shaft 2.
The spraying may be terminated when, for example, it is wound about 3 to 5 times.

The web used for the toilet is
A material that easily dissolves when wet with water is used.However, when the liquid is sprayed on the start end of the web as described above, the cellulose in the wet web comes to hydrogen bond with each other. Thus, the webs that polymerize inward and outward are bonded to each other.

Next, after the wide web W is wound around the winding shaft 2 by the product length in the web winding section 12, the winding operation is temporarily stopped, and After discharging the long web wound body S with the winding shaft from the web winding unit 12 to the temporary receiving unit 15 side, the long web wound body S with the winding shaft is cut off by the web cutting device 16. In addition, the long web wound body S with the winding shaft separated from the web is discharged from the temporary receiving portion 15 side onto the conveyor 18 and then transferred to the next process side.

Next, the shaft 21 is removed from the long web wound body S with the winding shaft.
Is removed as indicated by reference numeral 28 ′ in FIG. 7, and the high-pressure air in the elastic tube 26 is removed. Then, the shaft 2
1, the outer diameter of the shaft body 21 becomes smaller than the inner diameter of the core 22, and the shaft body 21 can be removed. In the shaft removal step, the vicinity of the web winding start end is still wet, but the cores 22 are provided between the inner peripheral portion of the web winding body and the shaft 21. The shaft 2
1 can be removed from the web winding body without hindrance.
The removed shaft body 21 has another winding core 22, 22.
Are assembled to form a winding shaft 2, which is used sequentially in the web winding machine 1.

After the shaft 21 is removed, the long web wound body T ₁ with the core is dried by the drying means 3. That is, in the embodiment shown in FIG. 8, and supplies the hot air from the dryer 31 to pass the core with long web wound body T ₁ of the central bore. Thus hot air to so as to pass through the center hole of the core with long web wound body T _1, it is possible to intensively dry the center portion humid web wound body, further the heart Cores 22 and 2
Since the small gap A is formed between the two, hot air comes into the web winding body portion from the small gap,
Drying efficiency is improved. In addition, when the vicinity of the web winding start end is dried in this way, the initially wet webs are dried and hardened while being adhered to each other, and a considerably hard cylindrical body is formed near the web winding start end. Will be.

Next, the dried long web wound body T ₂ with a core after the drying step is sent to the roll cutting machine 4 side as shown in FIG. It is cut one by one. At that time, the blade 44 of the roll cutting machine 4
Is, each winding core 22, 22 of the winding core with a long web wound body T ₂
The web winding portion is cut through the small gap A formed therebetween. Further, at the time of this cutting, the pressing action by the blade 44 against the web wound body is applied, the center portion of the core with long web wound body T ₂ are core 22,
・ There is no deformation of the wound web.

The short web wound body U with a core after the cutting step is sent to the core removing step side as shown in FIG. In this core removing step, the short web wound body U with a core is received in the holder 51 at the wound body receiving position 53, and the core 22 is reduced in length by the first pusher 57 at the core small length pushing position 54. At the core punching-out position 55 and the second pusher 58.
2 is completely pushed down, and the product roll R is held by the third pusher 59 at the wound body discharge position 56 with the holder 51.
It is designed to be discharged from.

[0044] In this manner toilet roll paper R that is manufactured, as shown in FIG. 11, with holes R ₁ of the perfect circle shape is formed at the center thereof, constituting the sides of the hole R ₁ Since the formed tubular portion R ₂ is a hard portion formed by hardening the web, the tubular portion R ₂ has shape retention properties,
And the web of the tubular portion R ₂ is until the end winding solved available, yet can flow directly to the toilet after use because the readily soluble when immersed in water.

The winding core 22 removed from the web winding body R
Is reassembled on the shaft body 21 as shown in FIG. 1 and used in the next web winding step.

In the method for manufacturing the toilet roll paper of this embodiment, the winding shaft 2 in which the cores 22, 22,. After the web winding process, the shaft 2
1 can be removed from the web winding body and used for the next web winding, so that the web winding start end of the web winding body is wetted with a liquid to produce a coreless roll paper. Even if it is a thing, the time which restrains expensive shaft body 21 can be shortened. Further, each of the winding cores 22 and 22 is fitted into the outside of the shaft body 21 with a small gap A enough to allow the blade 44 to pass therethrough. , The web winding can be cut while the core 22 is mounted in the web winding body, and the web winding body is not deformed at the time of the cutting. Further, since the long web wound body is cut by the product length by the blade 44, the end face of the manufactured product roll R becomes clean.

[Brief description of the drawings]

FIG. 1 is an exploded view of a winding shaft used in a method of manufacturing a roll paper according to an embodiment of the present invention.

FIG. 2 is an assembled state diagram of the winding shaft of FIG. 1;

FIG. 3 is a cross-sectional view of the winding shaft of FIG. 2 taken along line III-III.

4 is a view corresponding to a section taken along line IV-IV of FIG. 2 (state change diagram of FIG. 3);
It is.

FIG. 5 is an explanatory view of a web winding step of the roll paper manufacturing method according to the embodiment of the present invention.

FIG. 6 is a partially enlarged plan view of FIG. 5;

FIG. 7 is an explanatory diagram of a shaft removing step of the method for producing a roll paper according to the embodiment of the present invention.

FIG. 8 is an explanatory view of a drying step of the method for producing a roll paper according to the embodiment of the present invention.

FIG. 9 is an explanatory view of a cutting step in the method of manufacturing a roll paper according to the embodiment of the present invention.

FIG. 10 is an explanatory view of a core removing step of the roll paper manufacturing method according to the embodiment of the present invention.

FIG. 11 is a perspective view of a roll paper manufactured by the roll paper manufacturing method according to the embodiment of the present invention.

[Explanation of symbols]

1 is a web winding machine, 2 is a winding shaft, 3 is a drying means, 4 is a roll cutting machine, 5 is a coring machine, R is a roll paper (product roll), and S is a long web winding with a winding shaft. body, T ₁ is the core with length before drying long web wound body, T ₂ is the core with long web wound body after drying, U is the core with the short web winding body, W is in wide web is there.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A47K 10/16 B65H 18/04 B65H 19/30

Claims (1)

(57) [Claims] After a wide web (W) is wound into a roll to form a long web wound body, the long web wound body is successively lengthened by a roll cutting machine (4). A method for producing a toilet roll paper which is to be cut, wherein the outer diameter of the toilet roll paper (R) is substantially the same as the inner diameter of the center hole of the toilet roll paper (R), and the toilet roll paper (R) is manufactured per piece. A plurality of winding cores (22, 22,...) Formed of a tubular body having a length slightly shorter than the axial length of An elongated shaft body (21) which is freely diametric and has a smaller diameter than the hole diameter of the core (22) when the diameter is reduced, and has a larger diameter than the hole diameter of the core when the diameter is increased; The cores (22, 22...) Are placed outside the core (22). 22) The therebetween a roll cutting machine (4)
Are successively inserted in a row with a small gap such that the cutting tool (44) can pass through, and then the shaft body (21) is expanded so that each winding core (22, 22,...) When a wide web (W) is wound around the winding shaft (2) using a winding shaft (2) fixed to the outside of the body (21), first, the web winding start end is cut. After spraying a liquid for web bonding onto a predetermined small length range at the start end of the web while spraying, a web of a product length is sequentially wound around the outside thereof, and a long web wound body with a winding shaft ( A web winding step for forming S); and a shaft body (21) of the long web wound body (S) with the winding shaft.
And reduce the diameter of the shaft body (21) to each of the winding cores (22, 22.
A shaft removing step of removing from the shaft body, and a long web wound body (T) with a core removed from the shaft body (21).
₁ ) a drying step of drying the liquid-attached portion by an appropriate method; and drying the long web wound body (T ₂ ) with the dried core between each core (22, 22) by a roll cutting machine (4). A cutting step of cutting a small gap portion to form a short web wound body (U) with a core having a product length, and a winding core (22) from the short web winding body (U) with a core having a product length. A method for producing a roll paper for toilet, comprising: