Patent Publication Number: US-2023159292-A1

Title: Method for producing coreless roll paper

Description:
TECHNICAL FIELD 
     The present disclosure relates to a method for producing coreless roll paper. 
     BACKGROUND ART 
     Roll paper, such as typical toilet paper, includes a core made of tubular cardboard, and a tissue material (paper) is wound around the core to form a roll shape. Hence, after the roll paper is used up, the core needs to be discarded. To eliminate the need of discarding the core, various coreless roll paper has been produced. 
     In a proposed method for producing such coreless roll paper, for example, a winding-start end of a tissue material is folded back, moisture is added to the folded back portion, and the tissue material is wound on a winding shaft (shaft) (see Patent Literature 1). 
     With this production method, by adhering and solidifying a plurality of layers of the tissue material near the winding shaft with the moisture, a hollow, cylindrical inner solidified layer can be formed on the winding shaft side, that is, on the center side of the roll paper. This inner solidified layer serves as a core and can be used without being discarded by separating the adhered layers of the tissue material. Hence, because the roll paper produced by this production method does not need to have a core, discarding of the core is unnecessary. 
     However, in the above-described method for producing coreless roll paper in the related art, in order for the inner solidified layer to serve as a core having a certain strength, the tissue material needs to be tightly wound on the winding shaft, and layers of the tissue material need to be firmly adhered and solidified. Hence, it has been difficult to separate the layers of the tissue material in the solidified inner solidified layer, and thus, it has not been easy to use up the roll paper to the end. In order to make it more easy to separate the layers of the tissue material of the inner solidified layer than in the related-art coreless roll paper, a new production method has been developed by improving the above-described production method. 
     In the new production method, instead of a typical winding shaft with no texture on the outer circumferential surface, a winding shaft having gear-like grooves in the outer circumferential side surface is used. When a tissue material is wound on this grooved winding shaft, the tissue material is wound so as to be stretched between the ridges of the grooves, such that the portions laminated at the positions facing the channels of the grooves are not in contact with the winding shaft. Hence, a plurality of layers of tissue material near the winding shaft side is wound such that the portions laminated at the positions facing the channels of the grooves are bent toward the axis center. In other words, the tissue material is loosely wound, compared with a case where a typical winding shaft is used. 
     In the layers of the loosely wound tissue material, only the portions laminated on the ridges receive a pressure from an adjoining pressure roller and are adhered together. Hence, in this new production method, the paper in the inner solidified layer is relatively loosely wound and solidified, in which only the portions laminated on the ridges are adhered, and the other portions are not adhered together. Accordingly, while the inner solidified layer maintains a certain strength that is enough to serve as a core, the layers of the tissue material can be easily separated. 
     CITATION LIST 
     Patent Literature 
     [PTL 1] Japanese Patent No. 4103960 
     SUMMARY OF INVENTION 
     Technical Problem 
     Typically, in a method for producing coreless roll paper, when the outside diameter of roll paper, which is a tissue material wound on a winding shaft and is formed into a roll shape, has reached a desired value, the winding shaft is extracted from the roll paper. Hence, when the winding shaft is extracted from the roll paper, a winding-start end is sometimes pulled out with the winding shaft, leading to deformation of the inner solidified layer. 
     In particular, when the above-described grooved winding shaft is used, compared with a case where a typical winding shaft is used, adhered portions of the inner solidified layer are limited, and the tissue material is loosely wound. Hence, when the winding shaft is extracted, the winding-start end is more easily pulled out, compared with a case where the typical winding shaft is used. Thus, it has been difficult to satisfy both the strength of the inner solidified layer enough to serve as a core and ease of separation of the adhered layers of the tissue material. 
     The present disclosure has been made to solve the problem with the related-art technique described above, and an object thereof is to provide a method for producing coreless roll paper in which it is possible to prevent deformation of roll paper when a winding shaft is extracted, more specifically, to prevent a winding-start end from being pulled out in the case where a tissue material is loosely wound, to enable stable production of coreless roll paper. 
     Solution to Problem 
     A method for producing coreless roll paper according to the present disclosure includes: a transport step in which transport means draws paper from a material roll and transports the paper; an application step in which adhesive supply means applies an adhesive to a winding-start end of the paper that is being transported; a winding step in which the paper to which the adhesive has been applied is wound on a shaft and is formed in a roll shape; and an extracting step in which the shaft is extracted from roll paper, which is the paper formed in a roll shape, to form a center hole at the center of the roll paper. The shaft includes a body part having gear-like grooves in an outer circumferential side surface thereof, and a cover member is put on and fixed to the body part. In the winding step, the paper is wound on the cover member. 
     In the method for producing coreless roll paper according to the present disclosure, in the extracting step, the shaft is extracted with the cover member left in the roll paper, and then the cover member is removed from the roll paper. 
     A method for producing coreless roll paper according to the present disclosure includes: a transport step in which transport means draws paper from a material roll and transports the paper; a winding step in which the transported paper is wound on a shaft and is formed in a roll shape; an extracting step in which the shaft is extracted from roll paper, which is the paper formed in a roll shape, to form a center hole at the center of the roll paper; and an application step in which adhesive supply means is inserted into the center hole to apply an adhesive to an inner wall portion of the center hole. The shaft includes a body part having gear-like grooves in an outer circumferential side surface thereof, and a cover member is put on and fixed to the body part. In the winding step, the paper is wound on the cover member. In the extracting step, the shaft is extracted with the cover member left in the roll paper, and then the cover member is removed from the roll paper. 
     In the method for producing coreless roll paper according to the present disclosure, the cover member is a flexible, non-adhesive film or sheet. 
     In the method for producing coreless roll paper according to the present disclosure, the cover member is tubular. 
     Advantageous Effects of Invention 
     The method for producing coreless roll paper according to the present disclosure includes: a transport step in which transport means draws paper from a material roll and transports the paper; an application step in which adhesive supply means applies an adhesive to a winding-start end of the paper that is being transported; a winding step in which the paper to which the adhesive has been applied is wound on a shaft and is formed in a roll shape; and an extracting step in which the shaft is extracted from roll paper, which is the paper formed in a roll shape, to form a center hole at the center of the roll paper. The shaft includes a body part having gear-like grooves in an outer circumferential side surface thereof, and a cover member is put on and fixed to the body part. In the winding step, the paper is wound on the cover member. Hence, when the shaft is extracted from the roll paper, it is possible to extract the shaft while protecting the center hole in the roll paper with the cover member. Accordingly, even though the paper is loosely wound on the shaft, it is possible to prevent the winding-start end of the paper from being pulled out when the shaft is extracted. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is an explanatory diagram showing a schematic structure of a production apparatus for performing a method for producing coreless roll paper according to a first embodiment of the present disclosure. 
         FIG.  2    is an enlarged view showing a shaft and the vicinity thereof in the production apparatus for performing the method for producing coreless roll paper according to the first embodiment of the present disclosure. 
         FIG.  3    is a perspective view showing an end of the shaft in the production apparatus for performing the method for producing coreless roll paper according to the first embodiment of the present disclosure. 
         FIG.  4    is an enlarged view showing the end of the shaft of the production apparatus for performing the method for producing coreless roll paper according to the first embodiment of the present disclosure. 
         FIG.  5    is a first explanatory diagram showing transition of the roll paper produced by the method for producing coreless roll paper according to the first embodiment of the present disclosure. 
         FIG.  6    is a second explanatory diagram showing transition of the roll paper produced by the method for producing coreless roll paper according to the first embodiment of the present disclosure. 
         FIG.  7    is a third explanatory diagram showing transition of the roll paper produced by the method for producing coreless roll paper according to the first embodiment of the present disclosure. 
         FIG.  8    is a fourth explanatory diagram showing transition of the roll paper produced by the method for producing coreless roll paper according to the first embodiment of the present disclosure. 
         FIG.  9    is an explanatory diagram showing a schematic structure of a production apparatus for performing a method for producing coreless roll paper according to a second embodiment of the present disclosure. 
         FIG.  10    is an explanatory diagram showing adhesive supply means in the production apparatus for performing the method for producing coreless roll paper according to the second embodiment of the present disclosure. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     In a method for producing coreless roll paper according to the present disclosure, a shaft is extracted with a cover member left in roll paper, and then the cover member is removed from the roll paper. Hence, it is possible to reliably protect a center hole in the roll paper with the cover member when the shaft is extracted. Accordingly, because the winding-start end of the paper is not pulled out, it is possible to stably produce coreless roll paper. 
     The method for producing coreless roll paper according to the present disclosure includes: a transport step in which transport means draws paper from a material roll and transports the paper; a winding step in which the transported paper is wound on a shaft and is formed in a roll shape; an extracting step in which the shaft is extracted from the roll paper, which is paper formed in a roll shape, to form a center hole at the center of the roll paper; and an application step in which adhesive supply means is inserted into the center hole to apply an adhesive to an inner wall portion of the center hole. The shaft includes a body part having gear-like grooves in an outer circumferential side surface thereof, and a cover member is put on and fixed to the body part. In the winding step, paper is wound on the cover member. In the extracting step, the shaft is extracted with the cover member left in the roll paper. Then, the cover member is removed from the roll paper. Hence, by protecting the center hole in the roll paper with the cover member, it is possible to extract the shaft from the roll paper without causing deformation. Furthermore, because it is possible to directly apply the adhesive to the inner wall portion of the center hole, which is formed by extracting the shaft, only the minimum area necessary for preventing deformation of the roll paper can be adhered and solidified. 
     In the method for producing coreless roll paper according to the present disclosure, the cover member is made of a flexible, non-adhesive film or a sheet. Hence, it is possible to easily put the cover member on the outer circumferential side surface of the shaft. Furthermore, because it is non-adhesive, the friction caused when the shaft is extracted from the roll paper can be reduced. Moreover, when the cover member is removed from the roll paper, the cover member can be easily removed. Accordingly, compared with a case where the cover member is not a flexible, non-adhesive film or sheet, it is possible to more reliably prevent the winding-start end of the paper from being pulled out. 
     In the method for producing coreless roll paper according to the present disclosure, the cover member is tubular. Hence, it is possible to easily fix the cover member to the outer circumferential side surface of the shaft. 
     Embodiments of the present disclosure will be described below. 
     First Embodiment 
       FIG.  1    is an explanatory diagram showing a schematic structure of a production apparatus  1  for performing a method for producing coreless roll paper according to a first embodiment of the present disclosure, and shows the arrangement configuration of the respective components of the apparatus when the production apparatus  1  is viewed from a side.  FIG.  2    is an enlarged view showing a shaft  20 , serving as a winding shaft in the production apparatus  1 , and the vicinity thereof, as viewed from a side. 
     As shown in  FIG.  1   , in the production apparatus  1 , a material roll  10  is disposed at a predetermined position, and the production apparatus  1  includes feed rollers  2  and  3 , serving as transport means, arranged so as to be in contact with the outer circumference of the material roll  10 . The feed rollers  2  and  3  draw paper  11  from the material roll  10  and transport the paper toward the shaft  20  (in the transport direction shown by arrow X in  FIG.  1   ). The paper  11  drawn from the material roll  10  is transported also by a guide and rollers (not shown), besides the feed rollers  2  and  3 . 
     The production apparatus  1  also includes an adhesive supplier  7  serving as adhesive supply means, and a cutter  8 , at a position above the transported paper  11  and between the material roll  10  and the shaft  20 . The adhesive supplier  7  and the cutter  8  are disposed at a position immediately before the position where the paper  11  transported by the feed rollers  2  and  3  is wound on the shaft  20  (i.e., near the shaft  20 ). 
     The production apparatus  1  also includes winding auxiliary rollers  4  and  5  and a pressure roller  6  in the vicinity of the shaft  20 . The winding auxiliary rollers  4  and  5  and the pressure roller  6  are arranged so as to allow the transported paper  11  to be wound on the shaft  20 . 
     The pressure roller  6  is arranged above the shaft  20  and presses, from above, the paper  11  wound on the shaft  20 . Hence, the paper  11  is wound under a predetermined tension, while being pressed by the pressure roller  6 . The pressure roller  6  is supported by support means  9  or the like so as to be movable in the top-bottom direction. Thus, the pressing force thereof is adjusted according to the outside diameter of a roll paper  12 , which is the paper  11  wound on the shaft  20  and is formed in a roll shape ( FIG.  2    shows the position relationship among the winding auxiliary rollers  4  and  5 , the pressure roller  6 , and the roll paper  12 ). 
     The adhesive supplier  7  is disposed above the transported paper  11  (see  FIG.  1   ). The adhesive supplier  7  applies an adhesive  40  to the surface of the transported paper  11 , by jetting or dropping, as droplets, the adhesive  40  from above. The adhesive  40  hardens and solidifies the laminated paper  11  when dried. 
     Furthermore, the amount of the adhesive  40  to be applied by the adhesive supplier  7  and the area thereof are controlled by control means or the like (not shown). More than one adhesive supplier  7  may be arranged in a straight line between the ends of the paper  11  in the width direction. Although  FIG.  1    shows, for the purpose of explaining the adhesive supplier  7 , a state in which the adhesive  40  is being applied, in actuality, the adhesive  40  is applied only to the winding-start end (not shown) of the paper  11 . 
     Similarly to the adhesive supplier  7 , the cutter  8  is disposed above the paper  11  (see  FIG.  1   ). The cutter  8  cuts the paper  11  that is drawn toward the shaft  20 . More specifically, when the outside diameter of the roll paper  12  has reached a desired value, the cutter  8  is driven to cut the paper  11 . The driving of the cutter  8  is controlled by control means or the like (not shown). 
     Although a configuration in which the material roll  10  is disposed at a predetermined position, and the paper  11  is fed from the material roll  10  and is wound on the shaft  20  is shown in this embodiment, a configuration is also possible in which a paper making machine including a wire part, a press part, a dryer part, and the like is provided instead of the material roll  10 , the feed rollers  2  and  3 , and the like, and the paper  11  produced by this paper making machine is transported to the shaft  20  and the like by the transport means. 
       FIG.  3    is a perspective view showing an end of the shaft  20  in the production apparatus  1 .  FIG.  4    is an enlarged view showing the end of the shaft  20 . In  FIG.  3   , the illustration of the winding auxiliary rollers  4  and  5 , the pressure roller  6 , and the like, shown in  FIG.  1   , is omitted. 
     The shaft  20  is a cylindrical shaft member, and the paper  11  is wound on the outer circumferential side surface of a body part  22  at the center. In the shaft  20 , the outside diameter of ends  21  of the shaft  20  is smaller than the outside diameter of the body part  22  (see  FIG.  3   ), and the ends  21  are rotatably and removably engaged with engaging portions (not shown) of the production apparatus  1 . 
     Furthermore, as shown in  FIG.  4   , the shaft  20  has grooves  23  formed by cutting straight grooves, extending from one end to the other end of the body part  22 , in the outer circumferential side surface of the body part  22 . More specifically, a plurality of grooves  23  is successively formed in the circumference of the body part  22 . Due to the successive grooves  23 , the outer circumferential side surface of the body part  22  has a gear-like structure. In other words, the outer circumferential side surface of the body part  22  has a plurality of ridges  23   a  and channels  23   b  arranged alternately in the circumference. 
     Furthermore, a sleeve  30 , serving as a cover member, is fixed to the shaft  20  so as to cover the grooves  23  in the circumference of the body part  22  (see  FIG.  2   ). The sleeve  30  is formed of a flexible, non-adhesive film or sheet and is formed in a cylindrical shape. The sleeve  30  is fixed in a state in which the shaft  20  passes therethrough and the sleeve  30  is put on the body part  22 . The sleeve  30  is formed such that the inside diameter thereof is slightly larger than the outside diameter of the body part  22  and thus can be fixed simply by putting it on the body part  22 . 
     The sleeve  30  is put on the shaft  20  so as to be stretched from a ridge  23   a  to an adjoining ridge  23   a  of the grooves  23 . Hence, portions of the sleeve  30  opposed to the channels  23   b  are fixed so as to be slightly bent toward the axis center of the shaft  20  (see  FIG.  2   ). 
     Various films or sheets may be used for the sleeve  30 . For example, a film or a sheet that is made of a synthetic resin, such as polyethylene, polypropylene, polyvinyl chloride, or polystyrene, may be used, and the thickness thereof is, for example, from 10 μm to 1 mm. It is desirable that the sleeve  30  be made of a film or a sheet that is made of polyethylene or polypropylene, from the standpoint that it has flexibility, non-adhesiveness, and the property in which it is not easily adhered by a typical adhesive. 
     Although a configuration in which the cover member is the cylindrical sleeve  30  that can be fixed to the body part  22  simply by putting it thereon has been described in this embodiment, a configuration is also possible in which, for example, the cover member is formed of a rectangular film or sheet, and the film or sheet is wrapped around the body part  22  and is fixed with fastening means (not shown), such as adhesive tape or the like. 
     Next, the operation of the production apparatus  1  will be described. 
       FIGS.  5 ,  6 ,  7 , and  8    are explanatory diagrams showing transitions of the roll paper  12  produced with the production apparatus  1 .  FIG.  5    shows a state in which the paper  11  is wound to form the roll paper  12 , and  FIG.  6    shows a state in which the outside diameter of the roll paper  12  has reached a desired value. Furthermore,  FIG.  7    shows the roll paper  12  after the shaft  20  has been extracted, and  FIG.  8    shows the roll paper  12  after the sleeve  30  has been removed from a center hole  13 . 
     (Transport Step) 
     In the production apparatus  1 , the feed rollers  2  and  3 , as shown in  FIG.  1   , are rotationally driven to rotate the material roll  10 , which is in contact with the feed rollers  2  and  3  at the outer circumference thereof. As a result, the paper  11  is drawn from the material roll  10  and is transported at a predetermined speed. The paper  11  drawn from the material roll  10  is transported toward the shaft  20  (in the transport direction, shown by arrow X in  FIG.  1   ) at the above-described predetermined speed by a guide and rollers. 
     (Application Step) 
     Subsequently, the adhesive supplier  7  applies the adhesive  40  to the winding-start end of the transported paper  11 . Herein, the winding-start end is a portion corresponding to a plurality of layers of the paper  11  to be initially wound on the shaft  20  and is a portion having a length corresponding to, for example, five to twenty turns around the shaft  20  after the end of the paper  11  starts to be wound on the shaft  20 . Hence, in the production apparatus  1 , the application of the adhesive  40  is started when the end of the paper  11  is transported below the adhesive supplier  7 , and the application of the adhesive  40  is stopped when the paper  11  is wound five to twenty turns around the shaft  20 . 
     (Winding Step) 
     Subsequently, after the adhesive  40  is applied, the paper  11  reaching the shaft  20  is nipped between the shaft  20  and the winding auxiliary roller  4  and then between the shaft  20  and the winding auxiliary roller  5  and, consequently, is wound on the circumference of the shaft  20 . In other words, the paper  11  passes on the upper-end side of the winding auxiliary rollers  4  and  5  and is wound on the shaft  20  such that the side to which the adhesive  40  has been applied is located on the inner side of the roll. 
     Furthermore, in the winding step, the sleeve  30  has been fixed so as to be put on the circumference of the shaft  20 , more specifically, the grooves  23  in the body part  22  (see  FIGS.  5  and  6   ). Hence, the paper  11  is not directly wound on the shaft  20 , but is wound on the shaft  20  with the sleeve  30  therebetween (see  FIG.  5   ). 
     The paper  11  wound on the shaft  20  and formed in a roll shape is laminated on the sleeve  30  while being pressed by the pressure roller  6 . By being pressed by the pressure roller  6 , the paper  11  is wound without creases and in the form of a perfect circle around the shaft  20 , serving as the axis. 
     Although a configuration in which the side to which the adhesive  40  is applied is located on the inner side of the roll has been described in this embodiment, a configuration is also possible in which the end of the paper  11  is folded back when the paper  11  starts to be wound, so that the side to which the adhesive  40  is applied is not in contact with the surface of the sleeve  30 . 
     Then, when the outside diameter of the paper  11  wound on the shaft  20  and formed in a roll shape, that is, the roll paper  12 , has reached a predetermined value (see  FIG.  6   ), feeding of the paper  11  from the material roll  10  is stopped, and the paper  11  is cut with the cutter  8 . It is possible to configure such that application means or the like (not shown) applies an adhesive or moisture to the cut end of the paper  11  (the terminal end of the paper  11  wound on the shaft  20 ), so that the terminal end is fixed to the outer circumferential surface of the roll paper  12 . 
     (Extracting Step) 
     Subsequently, the shaft  20  is removed from the engaging portions of the production apparatus  1 , and the roll paper  12  is transferred to a support base (not shown). Then, the shaft  20  is extracted from the roll paper  12  fixed to the support base. Herein, when the shaft  20  is extracted from the roll paper  12 , only the shaft  20  is extracted such that the sleeve  30  is left in the roll paper  12 . By doing so, the center hole  13 , which remains after the shaft  20  is extracted, is formed in the center of the roll paper  12 , and the sleeve  30  is left in the inner wall portion of the center hole  13  (see  FIG.  7   ). The center hole  13  is formed as a through-hole extending along the axis of the roll paper  12 , and a texture pattern corresponding to the grooves  23  is formed on the inner wall portion (see  FIGS.  7  and  8   ). 
     Next, the sleeve  30  is removed from the inner wall portion of the center hole  13  (see  FIG.  8   ). For example, the sleeve  30  may be perforated in advance, so that the sleeve  30  can be torn in two by pulling the longitudinal ends of the sleeve  30  in opposite directions. With this configuration, by pulling the ends of the sleeve  30  from the ends of the center hole  13 , the sleeve  30  is torn at the perforated line and can be easily removed. 
     In this embodiment, although a configuration in which the sleeve  30  is removed from the center hole  13  after the shaft  20  is extracted has been described, for example, a configuration is also possible in which the body part  22  of the shaft  20  has a variable outside diameter, the outside diameter of the body part  22  is reduced after the paper  11  is wound, and the sleeve  30  is removed at the same time when the shaft  20  is extracted. 
     Furthermore, in this embodiment, although a configuration in which the paper  11  is wound on the single shaft  20  has been described, for example, a configuration is also possible in which a plurality of shafts  20  is provided, and the paper  11  is successively wound thereon. In that case, although a configuration in which the paper  11  is cut with the cutter  8  when the roll paper  12  has reached a predetermined outside diameter has been described in this embodiment, for example, a configuration in which a next shaft  20  is supplied from above the paper  11 , at a position between the adhesive supplier  7  and the cutter  8 , before the paper  11  is cut is desirable. 
     More specifically, when the paper  11  is cut, one end is wound on the roll paper  12 , and the other end is wound on the next shaft  20 . Hence, the adhesive supplier  7  preliminarily applies the adhesive  40  to the ends and the vicinity thereof, and the next shaft  20  is supplied so as to be lightly pressed against this portion. By doing so, it is possible to cut the paper  11  in a state in which the portion serving as the end of the paper  11  is temporarily adhered to the sleeve  30  of the next shaft  20 . When the cutter  8  performs cutting, for example, an air jetting device (not shown) may be provided below the cutter  8  to jet air from below to prevent the temporarily adhered paper from peeling off. 
     After the paper  11  is cut, the next shaft  20  to which the end of the paper  11  is temporarily adhered is moved to the position above the winding auxiliary rollers  4  and  5  in accordance with the restart of the transportation of the paper  11 . Thereafter, the paper  11  is wound as in the normal winding step. By performing the extracting step on the roll paper  12  located on the winding auxiliary rollers  4  and  5  simultaneously with the movement of the next shaft  20 , the next shaft  20  can be successively supplied to the position above the winding auxiliary rollers  4  and  5  in accordance with the transfer of the roll paper  12  to the support base. This way, it is possible to successively wind the paper  11  on the shaft  20 . 
     The method for producing coreless roll paper according to this embodiment is configured as above. With this production method, when the shaft  20  is extracted from the roll paper  12 , it is possible to extract the shaft  20  from the roll paper  12  while reliably protecting the center hole  13  in the roll paper  12  with the sleeve  30 . Accordingly, even though the paper  11  is loosely wound on the shaft  20 , it is possible to prevent the winding-start end of the paper  11  from being pulled out when the shaft  20  is extracted, and thus, it is possible to stably produce the coreless roll paper  12 . 
     Second Embodiment 
     Next, a method for producing coreless roll paper according to a second embodiment of the present disclosure will be described. 
       FIG.  9    is an explanatory diagram showing a schematic structure of a production apparatus  50  for performing a method for producing coreless roll paper according to the second embodiment of the present disclosure.  FIG.  10    is an explanatory diagram showing adhesive suppliers  60  of the production apparatus  50 . The configurations that are the same as those of the production apparatus  1  will be denoted by the same reference signs, and detailed descriptions thereof will be omitted. The configurations different from those in the production apparatus  1  will be mainly described. 
     As shown in  FIG.  9   , in the production apparatus  50 , the material roll  10  is disposed at a predetermined position, and the production apparatus  50  includes the feed rollers  2  and  3  arranged so as to be in contact with the outer circumference of the material roll  10 , the winding auxiliary rollers  4  and  5  and the pressure roller  6  arranged near the shaft  20 , and the cutter  8  arranged near the shaft  20 . This configuration is the same as that of the production apparatus  1 . 
     As shown in  FIG.  10   , the production apparatus  50  includes a pair of adhesive suppliers  60  opposed to each other, instead of the adhesive supplier  7  of the production apparatus  1 . The adhesive suppliers  60  are a pair of tubular members with sealed ends and are inserted into the center hole  13  remaining after the shaft  20  is extracted from the roll paper  12  and then the sleeve  30  is removed. 
     More specifically, the movement of insertion ends  60   a  and  60   b  of the adhesive suppliers  60  is controlled by control means and the like (not shown), and the insertion ends  60   a  and  60   b  are inserted from the ends of the center hole  13  (see  FIG.  10   ). Furthermore, the insertion ends  60   a  and  60   b  have a plurality of jetting holes (not shown) in the circumferences thereof, through which the adhesive  40  is jetted by delivery means, such as a pump or the like (not shown). The amount and area of the adhesive  40  jetted from the jetting holes in the insertion ends  60   a  and  60   b  are controlled by the delivery means. 
     Next, the operation of the production apparatus  50  will be described. 
     The operation in the application step, which is different from that in the production method according to the first embodiment, will be mainly described. Furthermore, in the method for producing coreless roll paper according to the second embodiment, because the application step is performed after the extracting step, the paper  11  is wound on the shaft  20  without the adhesive  40 . s 
     (Application Step) 
     In the roll paper  12  after the shaft  20  is extracted in the extracting step and then the sleeve  30  is removed, the insertion ends  60   a  and  60   b  of the adhesive suppliers  60  are inserted from the ends of the center hole  13 . Then, the insertion ends  60   a  and  60   b  inserted into the center hole  13  jets the adhesive  40  onto the inner wall portion of the center hole  13  through the jetting holes (see  FIG.  10   ). With this configuration, it is possible to apply an appropriate amount of the adhesive  40  only to the minimum area of the inner wall portion of the center hole  13  that needs to be adhered and solidified. 
     The method for producing coreless roll paper according to this embodiment is configured as above. With this production method, even though the roll paper  12  is wound without the adhesive  40 , it is possible to extract the shaft  20  from the roll paper  12  without causing deformation by protecting the center hole  13  with the sleeve  30 . Moreover, because it is possible to directly jet the adhesive  40  to the inner wall portion of the center hole  13  remaining after the shaft  20  is extracted and the sleeve  30  is removed, only the minimum area necessary for preventing deformation of the roll paper  12  can be adhered and solidified. Accordingly, because the portion solidified with the adhesive  40  is small, the coreless roll paper  12  can be easily used up to the end. 
     Although a configuration in which the paper  11  is wound without the adhesive  40  has been described in this embodiment, a configuration is also possible in which, in order to prevent the paper  11  from being unwound when it is wound on the shaft  20 , the paper  11  is wound on the shaft  20  in a temporarily adhered state by jetting water onto the winding-start end of the paper  11 . 
     Although the embodiments of the present disclosure have been described in detail above, the present disclosure is not limited to the above-described embodiments, and various design changes may be made as long as such changes do not depart from the claims. 
     REFERENCE SIGNS LIST 
       1  production apparatus 
       2 ,  3  feed roller 
       4 ,  5  winding auxiliary roller 
       6  pressure roller 
       7  adhesive supplier 
       8  cutter 
       9  support means 
       10  material roll 
       11  paper 
       12  roll paper 
       13  center hole 
       20  shaft 
       21  end 
       22  body part 
       23  groove 
       23   a  ridge 
       23   b  channel 
       30  sleeve (cover member) 
       40  adhesive 
       50  production apparatus 
       60  adhesive supplier 
       60   a,    60   b  insertion end 
     X transport direction