JPH06171808A - Manufacture of roll paper for toilet - Google Patents

Abstract

PURPOSE:To facilitate the manufacture of coreless roll paper by sprinkling a powderlike bonding agent at a time point when each web rolling start end portion has been wound around each roll core by one time or so, hardening each rolling start end portion by heating and melting the powderlike bonding agent after the completion of each web winding up, and then drawing out each roll core. CONSTITUTION:A shaft body U which is a common shaft V furnished with plural roll cores Q is positioned at a web winding up portion to which each web cut apart to a product width by means of a slitter is led, and a powderlike bonding agent is sprinkled at a time point when each web rolling start end portion has been wound around each roll core Q by one time or so. After the completion of winding up to a predetermined product length, the gathering body of roll bodies R is discharged from the web winding up portion and the following web are cut off. Next, the common shaft V is pulled out, and separation to each roll P is made, and then, it is delivered to a heating process, and the powderlike bonding agent is melted, and a hard pipelike body is formed in the vicinity of a web rolling start end portion. Afterwards, each roll core Q is drawn out of each roll body R by pushing down each pushing piece 52 of a core pulling out device 5 downward by means of cylinders 51, and roll cores Q thus pulled out are used again.

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 roll paper for toilet, and more particularly to a production method for producing a coreless roll paper having no core tube in its central portion.

[0002]

2. Description of the Related Art A hole for inserting a shaft of a roll paper holder provided in the toilet needs to be formed at the center of the roll paper for toilet. by the way,
A conventional general toilet roll paper is formed by winding a web around a paper core tube.

Further, in recent years, a shaft body (generally called an air shaft) which can be reduced and expanded in a radial direction is used,
After winding the web with the shaft expanded, the shaft is contracted (a gap is formed between the outer surface of the shaft and the inner surface of the hole of the roll paper), and the shaft is rolled in that state. There is known a manufacturing method in which a roll paper for a coreless toilet without a core tube is manufactured by removing the roll paper from a hole of the paper (see, for example, JP-A-4-55250). Further, in such a coreless roll paper, it is preferable to keep the shape of the center hole as circular as possible because the shaft of the holder is inserted into the center hole.

By the way, in the above-mentioned known coreless roll paper manufacturing method, in order to maintain the shape of the center hole of the roll paper in a circular shape, the web winding start end is sprayed with an aqueous solution containing an adhesive while the web is being sprayed. The winding start end is wound around the outer peripheral surface of the shaft body, and the webs that are polymerized in the inward and outward directions are adhered with the aqueous solution. Further, if the web winding start end side is adhered with an aqueous solution in this way, the web and the shaft body will stick to each other while the web winding start end part is wet. Even if the shaft is contracted, the shaft cannot be removed properly, and therefore the shaft is removed after the web winding start end has been dried to some extent.

[0005]

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

Further, in the above-mentioned known coreless roll paper manufacturing method (for example, in Japanese Patent Laid-Open No. 4-55250),
A shaft (generally called an air shaft) that can be reduced and expanded in the radial direction is used, but this shaft is very expensive, and the shaft is removed from the center hole of the roll paper. When removing, since the aqueous solution attached near the end of the web winding must be dried to some extent, the time for the drying (at least 30% for natural drying).
However, the shaft body cannot be used for the next web winding, and the time for restraining the expensive shaft body for drying becomes long. Further, in general, the web winding capacity in the web winding step is, of course, much larger than the processing capacity which is derived from the drying time of the web winding start end, and the number of shafts corresponding to the web winding capacity is large. However, there is a problem in that a considerably high equipment cost is required only for the shaft body.

The present invention has been made in view of the above-mentioned conventional problems.
An inexpensive roll core can be used to manufacture coreless roll paper, and the diversion cycle of the roll core can be shortened (in other words, the time for commercializing the roll paper can be shortened). It is intended to propose a method for manufacturing paper.

[0008]

The method for producing a roll paper for a toilet of the present invention uses a winding core formed of a tubular body having an outer diameter substantially equal to the inner diameter of the central hole of the roll paper for a toilet. , As follows. First,
When winding the web around the winding core, while adhering a powdery adhesive having a property of melting and adhering the web by being heated to a predetermined small length range of the web winding start end, After winding the web winding start end around the core, a web having a product length is sequentially wound around the core to form a web winding body with a core (web winding step).
Next, while the web winding body is formed around the core, the web winding body with the core is heated by an appropriate heating means such as hot air to melt the adhesive (adhesive melting step). . Then, the core is removed from the web winding body with the core in a state where the adhesive is melted and the webs on the web winding start end side are bonded to each other (core removing step).

[0009]

In the present invention, at the beginning of the web winding process,
While the powdery adhesive for adhering the web is attached to the web winding start end, the web winding start end is wound around the winding core. This powdery adhesive has the property of melting when heated. The length range to which the adhesive agent is attached at the web winding start end is such that the web winding start end is wound around the winding core several times after the web winding start end is wound around the winding core once, for example. It is continuously performed until it is wound (for example, about 3 to 5 times). In addition, after the product is commercialized, the type of the adhesive and the amount to be adhered are appropriately determined so that the adhesive portion can be easily unwound (peeled) when the roll paper is used. Set.

Then, when the powdery adhesive is adhered (interposed between the inner and outer webs) to the web winding start end side as described above, when the web having the product length is wound around the winding core,
The web winding body is separated from the web, and the web winding body with the core is removed from the web winding device.

The web-wound body with a core formed in the web winding step is transferred to a heating means installation position and heated there, but in this heating step (adhesive melting step), it is forcibly forced by hot air or the like. Let it heat. At this time, if hot air is allowed to pass through the holes in the core, the web winding body is heated from the inside, so that the heating efficiency is improved. Then, when the vicinity of the web winding start end to which the powdery adhesive is adhered is heated, the adhesive melts, and the molten adhesive causes the inner and outer polymerized webs in the vicinity of the web winding start end to be melted. They are glued together. It should be noted that this adhesive becomes solid when it is cooled after being melted. In this state, a plurality of webs near the web winding start end are integrated with appropriate hardness to maintain a tubular shape, and moreover, between the inner surface of the tubular portion and the outer surface of the winding core. Has almost no adhesive action. Further, the bonded portion by the adhesive is bonded to such an extent that it can be unwound at the time of use.

Then, the web winding body with a core, which has undergone the adhesive melting step, is transferred to the core removing step side. In the core removing step, the core may be removed from the web winding body with the core to which the vicinity of the web winding start end is adhered by, for example, a punching method. In this case, if the outer peripheral surface of the winding core is subjected to a treatment such as Teflon processing that makes it difficult to adhere the core, the work of removing the winding core becomes easy.

In the coreless roll paper thus manufactured, a relatively hard cylindrical portion is formed in the center thereof, and a cylindrical hole is secured inside the cylindrical portion. Also, with this coreless roll paper, the web of the tubular portion at the center can be unwound and used, and since the web of the tubular portion dissolves easily when immersed in water, it can be poured into the toilet. There is no problem. The core removed from the web winding body is transported to the web winding step and repeatedly used.

[0014]

As described above, according to the method for manufacturing a toilet roll paper of the present invention, since it can be carried out by using an inexpensive winding core, the facility cost can be reduced even if the coreless roll paper is manufactured. Can be made. Further, since the web winding body with the core to which the powdery adhesive is attached in the vicinity of the web winding start end is forcibly heated by the heating device, for example, the air shaft described in the section of the prior art. Compared with the case of using, the time for restraining the core can be shortened, the total number of cores used can be reduced, and the time for commercializing the roll paper can be shortened.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 7. In the method for manufacturing a toilet roll paper according to this embodiment, a web winding device for winding a web Q around a winding core Q is described. Step, heating step for heating the web winding body R with the core Q (adhesive melting step described later), and core removal for removing the core Q from the heated core-wound web winding body By carrying out the steps, the coreless roll paper R as shown in FIG. 7 is manufactured. Before describing the manufacturing method of this embodiment, the configuration of the devices used in this embodiment will be described.

FIG. 1 shows an entire production line for coreless roll paper. In FIG. 1, reference numeral 1 is a web winding device that winds a web having a product length around a winding shaft to form a web winding body with a winding core (see FIG. 2). still,
In the illustrated example, three web winding devices 1 are arranged side by side in total. Reference numeral 2 denotes a web winding body removing / removing device with a winding core that removes each web winding body P with a winding core from a winding shaft U of a web winding body Y with a winding shaft (see FIG. 3) described later. 3 is a two-row state of an assembly Z (FIG. 4) of web winding bodies P with cores, which are conveyed in one row state in groups (for example, 16 pieces) from the conveyer 117 of each web winding device 1. It is a merging / supplying device for supplying to the next process side (heating process side). Reference numeral 4 is a heating device for heating and melting the adhesive attached to the web winding start portion as described later (see FIG. 5). Reference numeral 5 denotes a core removing device (see FIG. 6) for removing the core Q from the web winding body P with a core.
Reference numeral 6 denotes a packaging machine for collectively packaging a predetermined number of cored web winding bodies R (see FIG. 7).

The core Q is formed of a tubular body having an outer diameter (for example, an outer diameter of about 30 to 50 mm) which is substantially the same as the inner diameter of the center hole of the commercially available toilet roll paper. The core Q has the same length as the width of the web of the product and has a hole Qa (see FIG. 4) inside. The material of the winding core Q is preferably made of, for example, metal, wood, synthetic resin, or the like, which is relatively heat resistant and has durability even when repeatedly used. Further, it is also preferable to form a coating (for example, a Teflon coating) on the outer peripheral surface of the winding core Q for facilitating (slipping) the core during the core removing operation described later. The winding shaft U has a large number (for example, 16) of cylindrical winding cores Q, Q ... Outside fitted on one common shaft V, and caps () on both ends of the common shaft V, respectively. The retaining member) W ₁ and W ₂ are formed by fitting them together. In FIG. 3, the right cap W ₁ is fixed to the common shaft V, while the left cap W ₂ is detachable from the common shaft V. Then, if the left cap W ₂ is separated, the cores Q, Q, ... Can be inserted into and removed from the common shaft V.

As shown in FIG. 3, the winding cores Q are used by inserting a plurality of (for example, 16) cores one after another in a single row in sequence outside a single common axis V. Each of the winding cores Q, Q ... Is detachably attached to the common shaft V, and is used as a single shaft U when used.

The web winding device 1 is, as shown in FIG.
The wide continuous web T ₁ fed from the original roll S is divided into product widths (for example, 16 divisions) by the slitter device 11, and the divided webs T ₂ are supplied to the winding section 12. The winding unit 12 is sequentially supplied with one winding shaft U as shown in FIG.

The take-up shaft U is supplied to a predetermined position of the take-up section 12, and the divided webs T ₂ are respectively provided with the take-up cores Q, Q.
-It is wound at a position that corresponds exactly to. Further, when the winding start end of each divided web T ₂ is started to be wound on the winding shaft U, as shown in FIG.
A powdery adhesive (reference B) is discharged from 3a, and the adhesive is adhered to a predetermined small length range of the web winding start end. The adhesive B is for adhering the webs at the web winding start portions which are polymerized in the inward and outward directions. Then, in the winding section 12, the respective winding cores Q, Q
When the divided webs T ₂ each having the product length are wound around, the winding action of the web winding device 1 is stopped, and the web winding body X with a winding shaft formed by the winding portion 12 is wound. After being discharged to the temporary receiving section 14, it is cut by the cutting tool 16 of the cutting device 15 and separated from the continuous web, and at the same time, a gluing device (not shown) glues the cut end of the web winding body side to cut the cutting. The ends are glued to the outer surface of the web roll.
(The web winding body Y with a winding shaft shown in FIG. 3 is formed). Then, the separated web winding body Y with the winding shaft is discharged onto the transport conveyor 117. In the production line of FIG. 1, three web winding devices 1 are arranged side by side, and each web winding device 1 individually manufactures a web winding body Y with a winding shaft.

From each web winding device 1 to the conveyor 11
Web winding body Y with a take-up shaft ejected onto 7 (Fig. 3)
After the left-side cap W ₂ is removed by the web-wound body with core removal device 2, the web rolls P, P, ... With cores are automatically removed from the common shaft V. Winding shaft U
Web winding body with each core P, P ...
Are separated from each other as shown in FIG.

At the end of each conveyor 117, a web winding body P with a core is provided by the merging / supplying device 3.
A predetermined number (for example, 16) are temporarily held in a two-row state. Then, the web winding bodies Z, Z (see FIG. 4) each having a group of row-shaped winding cores that have been kept on standby are supplied to the heating device 4 side by the merging / supplying device 3 in two rows.

As shown in FIG. 5, the heating device 4 is provided with an appropriate intermittent feeding device 40 so that the web winding body Z with each row-shaped winding core is provided.
Are sequentially fed in the lateral direction (from right to left in FIG. 5) by a predetermined length, and hot air from the hot air generator 41 is fed into the central hole (of the core Q of the web winding body Z with row-shaped cores). The holes Qa, Qa, ... Are blown and passed to heat and melt the adhesive adhered to the vicinity of the web winding start end in the web winding process.
In addition, the hot air generator 41 is a web winding body Z with a row-shaped winding core.
One is provided at each end of the length direction of
Further, the nozzles 43 connected to the hot air generators 41, 41 via the ducts 42 are arranged so that every other one of the web winding bodies Z, Z ... It is arranged to blow out. The hot air generator 4
The number of nozzles 43 connected to 1 is three in the illustrated example, but actually, for example, about 8 to 10 nozzles are provided.
Further, in this embodiment, the web winding body Z with each row-shaped winding core is provided.
Passes through the heating device 4 in 4 to 5 minutes.

The heated web winding body Z with column-shaped cores, which has come out of the heating device 4, is sent to the core removing device 5 by the conveyer 141, where the web winding bodies P with cores are wound.
Then, the core Q is sequentially removed to form the core-extracted web winding body (coreless roll paper) R shown in FIG. As shown in FIG. 6, the centering device 5 of this embodiment employs a push piece 52 which is vertically moved by an air cylinder 51. The outer diameter of the pushing piece 52 is the same as or slightly smaller than the outer diameter of the winding core Q. In this core removing device 5, the web winding body R with a core to be cored is positioned immediately below the pushing piece 52 in the advancing direction, and the air cylinder 51 is moved.
By pushing down the pushing piece 52 and pressing the winding core Q portion with the pushing piece 52, the winding core Q can be removed downward from the web winding body R portion.

The core-wound web winding body R discharged from the core-coring device 5 is sequentially transferred to the packaging machine 6 by the conveyor 151.
It is conveyed to the side, and a predetermined number of bags are packed there.

Next, using the coreless roll paper production line equipped with the web winding device 1, the heating device 4, the core removing device 5 and the like having the above-mentioned configuration, a method for producing toilet roll paper according to the embodiment of the present invention will be described. explain.

The web winding section 1 of the web winding device 1
As shown in FIG. 2, a plurality of webs T ₂ are guided to the web ₂ in a state in which the product width is divided by a slitter 11. Then, a shaft body U having a plurality of cores Q, Q ... Attached to a common shaft V is positioned on the web winding portion 12 so that each core Q corresponds to each web T _2. ,
When the web winding start end is wound about once around the winding core Q, the powder adhesive B for web adhesion is directed from the discharge port 13a of the adhesive supply device 13 to the web winding start end. The respective web winding start ends are wound around the respective cores Q while being uniformly discharged. This powdery adhesive is made of, for example, a synthetic resin, and has a low melting point (for example, a melting point of 10 or less) from the viewpoint of heating efficiency in the heating device 4 or heat deterioration of the web.
(0 ° C. or lower) is preferable, and the adhesive force may not be so strong. The adhesive is discharged from the discharge port 13a at a timing of 1 at the web winding start end around the winding core Q.
The discharge is started when the winding is completed, and the discharge is terminated when the web winding start end is wound around the winding core Q, for example, about 3 to 5 times. Then, the web is wound in a state where the adhesive B discharged from the discharge port 13a adheres to the web winding start end (intervenes between the inner and outer webs).

Next, in the web winding section 12, after winding the web around each core Q by the product length,
The winding action is once interrupted, and the core-wound web winding body X in the web winding portion 12 is discharged from the web winding portion 12 to the cradle 17 side, and then the web winding device 16 winds the web. Separate body X. Then, as shown in FIG. 3, one aggregate roll body Y is formed by winding the web winding bodies R, R ..

Next, the assembly roll body Y is disassembled by the web winding body removing / removing device 2 with a core to separate the web winding bodies P, P ... Then, the separated web-wound bodies P, P, ... With winding cores are placed on a conveyor 117 as shown in FIG.
Is fed into the heating device through the inlet (see FIG. 5). In the heating device 4, the web winding bodies Z, Z ...
Are sequentially and intermittently moved laterally by the intermittent feeding device 40, and the hot air from the nozzles 43, 43 ... Of the hot air generating devices 41, 41 is in the hole Qa of the web winding body Z with a row winding core. , And each of the web winding bodies P, P, ... With cores is heated from the center.

When the web winding body P with a core is heated from the center side in this way, the powdery adhesive agent adhered to the vicinity of the web winding start end is melted, and the melting is performed. The adhesive makes it possible to bond the webs near the web winding start end. When the webs are adhered to each other in this way, a considerably hard cylindrical body (the portion R _{2 in} FIG. 7) is formed near the winding start end of the webs.

Next, the web-wound body P with a core after the heating step is sent to the core removing step side as shown in FIG. In this core-coring step, the air cylinder 51 of the core-coring device 5 is extended while the core Q portion of the web winding body with core P is positioned immediately below the pressing piece 52 of the core-coring device 5. The core piece Q is pulled out with respect to the web winding body R with the pushing piece 52.

The roll paper R (FIG. 7) manufactured in this manner has a hole R ₁ formed in the center thereof, and the tubular portion R ₂ forming the side surface of the hole R ₁ solidifies the web. The tubular portion R
₂ has a shape-retaining property, and the web of the tubular portion R ₂ can be unwound to the end and used, and moreover, it dissolves easily when immersed in water, so that it can be flushed to the toilet after use.

Winding core Q removed from web winding body R
Are reassembled on the common shaft V (FIG. 3) and used in the next web winding process.

In the above-described method for manufacturing a roll of toilet paper, since the pipe-shaped tubular body can be used as the winding core Q, the cost of the winding core Q can be kept low, and further, the powder winding at the web winding start end can be achieved. The web winding body P with a core formed by adhering the adhesive of 1. is heated by the heating device 4 to melt the powdery adhesive to bond the web near the winding start end. After that, the core Q is removed from the web winding body with the core by the core removing device 5, so that the relatively hard tubular portion R ₂ is not formed in the center of the web winding body. Core roll paper can be manufactured. When the powdery adhesive is melted by the heating device 4 as described above, the time for forming the hard tubular portion R ₂ in the central portion of the web winding body can be shortened, and the core removal and removal can be performed. The time during which the core Q is constrained until the core Q is removed in the process can be shortened, and the time for commercializing the roll paper can be shortened.

[Brief description of drawings]

FIG. 1 is a schematic view of a production line for performing a roll paper production method according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a web winding step in the production line of FIG.

3 is an explanatory diagram of a web winding body with a winding shaft manufactured by the web winding device of FIG. 2. FIG.

FIG. 4 is an explanatory view showing a state in which a web winding body with a winding core is removed from a winding shaft of the web winding body with a winding shaft shown in FIG. 3;

5 is an explanatory view of a heating step (adhesive melting step) in the production line of FIG.

FIG. 6 is an explanatory view of a core removing step in the manufacturing line of FIG.

FIG. 7 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 device, 4 is a heating device, 5 is a coring device,
B is a powdery adhesive, P is a web winding body with a winding core, Q is a winding core, and R is a coreless roll paper.

Claims (1)

[Claims] 1. A winding core formed of a tubular body having an outer diameter substantially the same as the inner diameter of the center hole of a toilet roll paper is used, and when winding the web around the winding core, the web winding start is started. Winding the web winding start end around the core while adhering a powdery adhesive having a property of melting and adhering the web by being heated to a predetermined small length range of the end. After that, a web winding step of forming a web winding body with a core by sequentially winding a web having a product length on the outer side thereof, and attaching the core with the web winding body formed around the winding core. Heating the web winding body by an appropriate heating means such as hot air,
An adhesive melting step of melting the adhesive, and a core removing step of removing the core from a web winding body with a core in a state where the adhesive is melted and the webs on the web winding start end side are bonded to each other. A method for producing a roll paper for toilet, comprising: