JP3366893B2 - Coreless sheet roll, method and apparatus for manufacturing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention is particularly suitable for thin paper roll products for cleaning applications such as toilet paper rolls, kitchen paper rolls and towel paper rolls.
Coreless sheet roll, manufacturing method and manufacturing apparatus thereof

[0002]

2. Description of the Related Art This type of coreless sheet roll can reduce the core material cost and does not require disposal of the core material after use.
In particular, it is widely used in the field of thin paper roll products for cleaning purposes such as toilet paper rolls, kitchen paper rolls and towel paper rolls.

As is well known, in such a coreless sheet roll, it is preferable to provide a pseudo core portion which exerts a shape retaining function when not in use but is peeled off and fed out when in use. Therefore, conventionally, as shown in FIG. 8, an adhesive liquid such as water or alcohol is applied over a predetermined length from the winding start end of the sheet roll 100, and after winding, the adhesive liquid-impregnated portion is bonded by heating and drying. By solidifying, the pseudo core 101 was formed.

[0004]

However, in practice, in such a conventional type, the entire predetermined number of winding portions are bonded and solidified very strongly from the beginning of winding, and the portion after the bonding portion cannot be fed out ( Or I could not get out smoothly). In this case, if the sheet is forcibly delivered, the delivery portion may be torn from the adhesive portion, and the remaining adhesive portion may not be delivered.

As a holder for thin paper rolls such as toilet paper rolls, recently, one-touch type roll holders that can be removed by simply lifting the rolls upward have been widely used. When applying a coreless roll, an upward force is applied to the roll when the sheet is unwound to the adhesive part,
It was also a problem that the remaining adhesive part came off from the holder.

On the other hand, in order to solve this problem, it is not impossible to adhere only the winding start end so that it can be fed out to the end, but in that case, instead of the core, a pseudo core that exerts a shape retaining function. Since there are almost no parts, there is a problem that the holder mounting hole (roll center hole) is crushed by an external force applied during storage, transportation and mounting.

[0007] Therefore, a main object of the present invention is to provide a coreless roll which can be smoothly fed out to the winding start end and used and whose holder mounting hole is not easily crushed, and a manufacturing method and a manufacturing apparatus therefor.

[0008]

[Means for Solving the Problems] Of the present invention which has solved the above-mentioned problems, the invention according to claim 1 is a coreless sheet roll comprising a continuous sheet, in which a winding start end portion of the continuous sheet is releasably adhered. To form a first adhesive portion, a predetermined length portion of the first adhesive portion is not adhered, and a predetermined length portion of the non-adhesive portion is releasably adhered to form a second adhesive portion. However, the second adhesive portion is formed over one turn or more, and the first adhesive portion and the second adhesive portion are formed by applying an adhesive and a release agent or an adhesive to the continuous sheet. It is a coreless sheet roll characterized by being processed.

The invention according to claim 2 is the coreless sheet roll according to claim 1, wherein the continuous sheet is a thin paper continuous sheet.

A third aspect of the present invention is the coreless sheet roll according to the first aspect, wherein the adhesive forming the second adhesive portion is water or glue.

According to a fourth aspect of the present invention, in the method for producing a coreless sheet roll by winding a continuous sheet on a winding shaft, the winding start end of the continuous sheet is peelably bonded to form a first bonded portion. And a second adhesive portion is formed by peeling the second adhesive portion at a predetermined length from the first adhesive portion, and the second adhesive portion is formed over one turn or more. The method for manufacturing a coreless sheet roll, wherein the adhesive portion and the second adhesive portion are formed by applying an adhesive and a release agent or an adhesive to the continuous sheet.

According to a fifth aspect of the present invention, after applying a release agent to the winding surface of the winding shaft, the sheet is started to be rolled, and at least one of the sheet winding start end portion and the sheet portion adjacent to the outside thereof is started. 5. The method for producing a coreless sheet roll according to claim 4, wherein an adhesive is applied so that the winding start end portion of these sheets and at least the sheet portion adjacent to the outside thereof are detachably attached.

According to a sixth aspect of the present invention, when the second adhesive portion is adhered, a release agent and an adhesive are applied to the predetermined length portion so that the sheets can be releasably adhered to each other to form the second adhesive. The method for producing a coreless sheet roll according to claim 5, wherein the portion is formed.

According to a seventh aspect of the present invention, in adhering the second adhesive portion, while the continuous sheet is wound around the winding shaft while accelerating or decelerating, a release agent and an adhesive agent are respectively applied to the predetermined length portion. 7. The method for manufacturing a coreless sheet roll according to claim 6, wherein the coreless sheet roll is applied in an amount applied per unit time, and the adhesive force at the portions to which the release agent and the adhesive are applied is made uniform in the sheet longitudinal direction.

According to an eighth aspect of the present invention, in adhering the second adhering portion, while advancing or decelerating the continuous sheet around the winding shaft, the plural adhering devices are used to adhere to the predetermined length portion. With each agent,
5. The method for producing a coreless sheet roll according to claim 4, wherein the adhesive application start position of each adhesive application device is shifted in the sheet longitudinal direction to make the amount of adhesive applied in the sheet longitudinal direction uniform.

According to a ninth aspect of the present invention, there is provided a winding shaft rotatably supported, a rotary drive source for rotationally driving the winding shaft, and a feeding means for feeding a continuous sheet to the winding shaft. , An adhesive applying means for applying an adhesive to a continuous sheet wound around a winding shaft, and a winding start end of the sheet are releasably adhered to form a first adhesive portion, and from the first adhesive portion Also, a predetermined length portion is not adhered, a predetermined length portion is releasably adhered to form a second adhesion portion, and the second adhesion portion is formed over one turn or more. And a means for manufacturing the coreless sheet roll.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to an example of a thin paper roll. FIG. 1 shows an example 1 of a thin paper roll manufacturing apparatus according to the present invention. First, a continuous thin paper sheet S fed from a supply reel (not shown) is embossed by an embossing roll device 2 as in the conventional type, and then, After the perforation is made by the perforation processing roll device 3, it is wound around the winding shaft 4.

In the winding mechanism of the illustrated example, the sheet roll R wound around the winding shaft is rotationally driven together with the winding shaft 4 by a driving roll 5 which is in contact with the surface of the sheet roll R. Reference numeral 6 in the drawing denotes a pressing roll for pressing the sheet roll R being wound downward by a biasing means (not shown), and the sheet roll R being wound is pressed against the drive roll 5 by the pressing roll 6. The pressing roll 6 is separated from the sheet roll R after being contacted and after the winding is completed, and the sheet roll R can be taken out. As the winding mechanism, it is also possible to employ a mechanism in which unevenness is formed on the outer peripheral surface of the winding shaft and the sheet is wound by rotationally driving the winding shaft (not shown).

In the apparatus of this embodiment, according to the present invention having the above-described structure, the peeling agent applying nozzle 7 and the adhesive applying nozzle 8 are provided at intervals in the feeding direction in the sheet feeding path to the winding shaft 4. Are arranged. Specifically, as shown in the drawing, the imparting nozzles 7 and 8 are provided at the positions facing the sheet passing surface of the tension rolls 9 and 9 arranged in the sheet feeding path from the perforation processing roll device 3 to the winding shaft 4, respectively. Is preferred. Although the release agent and the adhesive may be applied first or simultaneously, it is preferable that the release agent is applied first as shown in the drawing. Further, the release agent may be applied to one surface of the sheet S and the adhesive agent may be applied to the other surface thereof, or both the release agent and the adhesive agent may be applied to the same surface of the sheet S. However, as shown in the figure, it is preferable to apply an adhesive to the inner surface of the sheet S when wound and to apply a release agent to the outer surface of the sheet S when wound.

The form of applying the adhesive or the release agent is as follows.
As shown in FIG.
As shown in FIG. 2, a sheet that transfers a chemical liquid 12 such as an adhesive in the vat 11 to the liquid collection roll 10 and transfers it to a transfer roll 13 and then passes the transfer liquid in contact with the surface of the transfer roll 13 A transfer imparting form in which S is transferred and imparted can also be adopted. The illustrated example shows the case where the release agent is applied by the transfer method and the adhesive is applied by the nozzle injection method. On the contrary, the release agent is applied by the nozzle injection method and the adhesive is applied by the transfer method. Alternatively, the release agent and the adhesive may both be applied by a transfer method.

On the other hand, when manufacturing the sheet roll R,
We propose the following two methods. The first method is performed according to the adhesion control shown in FIG. That is, first, the sheet S
The winding start end is stopped to the position where the adhesive nozzle 8 faces, and the winding is restarted from this state, and the adhesive is sprayed from the adhesive nozzle 8 for a short time at a predetermined application amount per unit time. The adhesive is applied only to the winding start end (the portion from the starting end to about 10 cm in FIG. 3).
Since the speed is accelerated after the winding is restarted, the amount of adhesive applied per unit area to the sheet S decreases as the distance from the application start position increases.

After that, the winding start end is picked up by the winding shaft 4, winding is started, and the winding start end to which the adhesive has been applied is releasably adhered to at least the sheet portion adjacent to the outside thereof. One bonded portion is formed.
Next, after continuing the winding for a predetermined length or for a predetermined time, the winding is stopped. As a result, the predetermined length portion on the terminal side of the first bonded portion is set as the unbonded portion.

Then, the winding operation is restarted and
The release agent application nozzle 7 starts spraying the release agent at a predetermined application amount per unit time, and the application start site is aligned with the release agent application portion of the sheet S, and the adhesive application is predetermined from the adhesive application nozzle 8. Start spraying with the applied amount per unit time. The portions to which the release agent and the adhesive have been applied are sequentially wound around the winding shaft 4, and the adjacent sheets are releasably adhered to each other to form the second adhesive portion. Even in this case, since the sheet S accelerates after the winding is restarted, the amount of adhesive applied per unit area to the sheet S decreases as the distance from the adhesive application start position increases, but the amount of release agent applied is also different from that of the adhesive. Since it decreases at the same rate of decrease, as can be seen from FIG. 3, the adhesive force (difference between the amount of the adhesive applied and the amount of the release agent applied) at the part to which the release agent and the adhesive are applied is the longitudinal direction of the sheet S. In the subsequent winding and adhering step, the sheet S can be adhered with a uniform adhesive force in the longitudinal direction.

When the adhesive and the release agent are applied for a predetermined time, the application of the adhesive and the release agent are stopped in order, and thereafter, the application of the adhesive and the like is not performed and the winding is performed up to a predetermined number of windings. The sheet roll is completed.

On the other hand, regarding the adhesion of the winding start end portion, the release agent is applied from the nozzle 7 as in the case of the second adhesion portion, or the winding of the winding shaft 4 is performed before the winding of the winding shaft 4 is started. It is preferable to reduce the adhesive force of the winding start end portion to the adjacent sheet portion by applying a release agent to the surface (outer peripheral surface).

Thus, as shown in FIG. 4, the winding start end of the sheet S is releasably adhered to the sheet portion S2 adjacent to the outside by an adhesive (that is, a weak adhesive force that does not break the sheet at the time of peeling). in adhesion. the same applies hereinafter) by the first adhesive portion C1 formed by the unbonded portion X of a predetermined length of the end side than the first bonding portion C1, the non-contact
A second adhesive portion C2 is formed by adhering the adjacent sheets in a predetermined length portion closer to the terminal end side than the attachment portion X to each other in a peelable manner with an adhesive.
Thus, a coreless sheet roll R having a pseudo core can be obtained.

Then, in such a sheet roll R, when the sheet roll R is successively fed out during use, the second adhesive portion C
Up to 2 can be smoothly delivered without resistance, and even if it reaches the second adhesive portion C2, the resistance increases to some extent due to the adhesive force of the portion, but since the release agent is provided, it can be smoothly delivered without breaking. Yes, and the second adhesive part C
When 2 is used up and reaches the unbonded portion X, since it is not bonded, it can be smoothly fed out to the first bonded portion C1, that is, the winding start end without resistance, and the winding start end is bonded at the first bonded portion C1. However, since it has a small adhesion area, it can be easily peeled off without breaking if a little force is applied. Further, in particular, when the release agent is also applied to the starting end portion, it can be smoothly delivered to the starting end portion. Since the sheet can be smoothly fed out, the sheet roll is less likely to fall out of the holder even when used in the one-touch type roll holder.
Further, not only is such smooth delivery possible, but also the second bonding portion C2 serves as a pseudo core and exhibits a shape retaining function, so that there is an advantage that the holder mounting hole H is less likely to be crushed by an external force. Further, since the winding start end portion is adhered, the winding start end portion S1 may be peeled off during use as shown in FIG. 5, and the situation may occur in which the rotation of the sheet roll R is obstructed by being entangled with the holder shaft. Hateful.

In the second method, when the second adhesive portion C2 is adhered and the adhesive is applied during accelerating the winding as in the above example, the amount of the adhesive applied is not dependent on the release agent. It is made uniform in the longitudinal direction, and specifically, it is performed according to the adhesion control shown in FIG. Characteristically, the plurality of adhesive application nozzles apply the adhesive to the second adhesive portion respectively, and the application start positions of the adhesives of the adhesive application nozzles are shifted in the longitudinal direction of the sheet to be applied stepwise. As a result, the amount of adhesive applied in the longitudinal direction of the sheet is made uniform as a whole. It should be noted that the plurality of application nozzles may be provided at intervals in the sheet moving direction, or as shown in FIG. 7, they may be arranged side by side in the sheet width direction at the same position in the longitudinal direction of the sheet S. Note that FIG.
.. show the nozzles that apply the first-stage adhesive in FIG. 5, and 18, 18 ... show the nozzles that apply the second-stage adhesive. Others are the same as the first method.

Although only the application control of the adhesive is shown in FIG. 6, it is needless to say that the release agent can be applied in the same multistep manner to make the application amount of the release agent uniform in the longitudinal direction of the sheet. In addition, the release agent and adhesive are applied in multiple stages, and the adhesive strength (difference between the applied amount of the adhesive and the applied amount of the release agent) is uniform in the longitudinal direction of the sheet. In addition, the amount of the release agent and the adhesive applied can be made uniform in the longitudinal direction of the sheet.

<Others> (b) The method of adjusting the adhesive force by using the above-mentioned adhesive and release agent together is the same as in the conventional type, in which the whole from the winding start end to a predetermined number of windings is adhered to form a pseudo core. It can also be applied in the case of forming, etc., and since the adhesive force can be suppressed by the release agent, there is an advantage that peeling and unwinding are easy as compared with the conventional adhesive method.

(B) The above-described multi-step bonding method can also be applied to the case where the pseudo core is formed by bonding the entire part from the winding start end to the predetermined number of windings as in the conventional type.

(C) In the above example, the case where the adhesive or the like is applied during the winding acceleration is explained, but the present invention is not limited to this and can be applied to the case where the winding is performed at a constant speed. it can.

(D) The present invention can be applied to other continuous sheet rolls such as thin film sheet rolls for food packaging.

(E) As the adhesive of the present invention, water, alcohol, glue or a mixture thereof can be used especially when the sheet is paper, and in the case of other sheet materials, it is a known material depending on the material. Adhesives can be used.

(F) As the release agent of the present invention, silicone oil, wax-based release agent, animal and vegetable oil, mineral oil, polyhydric alcohol, etc. can be used.

(G) In the same manner as for the adhesive and the release agent, known sheet roll chemicals (for example, in the case of a thin paper roll,
A fragrance or the like) can also be added to the sheet.

[0037]

As described above, according to the present invention, there are advantages that the winding start end portion can be smoothly fed out and used, and the holder mounting hole is hard to be crushed.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a thin paper sheet roll manufacturing apparatus according to the present invention.

FIG. 2 is a schematic view showing another adhesive / release agent application form.

FIG. 3 is a graph showing a first adhesion control mode.

FIG. 4 is a schematic view of a main part of a sheet roll according to the present invention.

FIG. 5 is a roll side view showing a peeled state of a winding start end portion.

FIG. 6 is a graph showing a second adhesion control mode.

FIG. 7 is a schematic plan view showing a nozzle arrangement form.

FIG. 8 is a side view of a conventional tissue paper roll.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sheet roll manufacturing apparatus, 2 ... Embossing provision roll apparatus, 3 ... Perforation provision roll apparatus, 4 ... Winding roll, 5 ... Drive roll, 6 ... Press roll, 7 ... Separation material provision nozzle, 8 ...
Adhesive application nozzle.

Claims (9)

(57) [Claims] 1. In a coreless sheet roll made of a continuous sheet, a winding start end portion of the continuous sheet is peelably adhered to form a first adhesive portion, and a portion having a predetermined length from the first adhesive portion is formed. The second adhesive portion is unbonded and is peelably bonded to form a second adhesive portion in a portion of a predetermined length than the unbonded portion, and the second adhesive portion is formed over one turn or more. The coreless sheet roll, wherein the second adhesive portion is formed by applying an adhesive and a release agent or an adhesive to the continuous sheet. 2. The coreless sheet roll according to claim 1, wherein the continuous sheet is a thin paper continuous sheet. 3. The coreless sheet roll according to claim 1, wherein the adhesive forming the second adhesive portion is water or glue. 4. A method for producing a coreless sheet roll by winding a continuous sheet on a winding shaft, wherein a winding start end portion of the continuous sheet is peelably bonded to form a first bonding portion. A predetermined length portion longer than the adhesive portion, to form a second adhesive portion by peelably adhering, and the second adhesive portion is formed over one turn or more, and the first adhesive portion and the second adhesive portion are formed. The method for producing a coreless sheet roll, wherein the adhesive portion is formed by applying an adhesive and a release agent, or by applying an adhesive to the continuous sheet. 5. After applying a release agent to the winding surface of the winding shaft, the sheet is started to be rolled, and an adhesive is applied to at least one of a sheet winding start end portion and a sheet portion adjacent to the outside thereof. The method for producing a coreless sheet roll according to claim 4, wherein the winding start end portion of these sheets and at least a sheet portion adjacent to the outer side thereof are detachably bonded. 6. The second adhesive portion is formed by applying a release agent and an adhesive to the predetermined length portion when the second adhesive portion is adhered so that the sheets are releasably adhered to each other. Item 6. A method for producing a coreless sheet roll according to Item 5. 7. When adhering the second adhesive portion, a continuous sheet is wound around the winding shaft while accelerating or decelerating, and a release agent and an adhesive agent are applied to the predetermined length portion for each predetermined unit time. The method for producing a coreless sheet roll according to claim 6, wherein the amount of the coreless sheet roll is applied in an amount such that the adhesive force at the portions to which the release agent and the adhesive are applied is made uniform in the sheet longitudinal direction. 8. When adhering the second adhering portion, while advancing or decelerating the continuous sheet around the winding shaft while adhering the adhesive to the predetermined length portion by a plurality of adhesive applying devices, The method for producing a coreless sheet roll according to claim 4, wherein the application start position of the adhesive of each adhesive application device is shifted in the sheet longitudinal direction so that the application amount of the adhesive is uniform in the sheet longitudinal direction. 9. A winding shaft rotatably supported, a rotary drive source for rotationally driving the winding shaft, a feeding means for feeding a continuous sheet to the winding shaft, and a winding shaft. Adhesive applying means for applying an adhesive to the continuous sheet, and a winding start end of the sheet are releasably adhered to form a first adhesive portion, and a portion of a predetermined length longer than the first adhesive portion is not formed. Adhesion control means for forming a second adhesive portion by adhering a predetermined length portion of the non-adhered portion in a peelable manner, and the second adhesive portion is formed over one turn or more. An apparatus for manufacturing a coreless sheet roll, which is characterized in that