JP2017210374A - Double paper tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double paper tube formed lighter than a conventional one, and enabling simplifying a manufacturing process.SOLUTION: A double paper tube 100 includes a lateral face body 104 and a construction body 110 between a cylindrical inner paper tube 101, and a cylindrical outer paper tube 102 arranged via a space part 103 outside the inner paper tube 101. The lateral face body 104 is a component which connects the inner paper tube 101 and the outer paper tube 102 while covering each opening part 103a in each of both ends in the inner paper tube 101 and the outer paper tube 102, and is formed of an inside lateral face body 104a arranged inside and an outside lateral face body 104b arranged outside. The construction body 110 is a component which is arranged in the space part 103, and connects integrally the inner paper tube 101 and the outer paper tube 102 together with the lateral face body 104, and is constructed between two lateral face bodies 104 provided in both ends of the space part 103. The construction body 110 is formed by assembling four small pieces 111 made of a plate-like body in a parallel-cross shape.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a double paper tube in which an outer paper tube having a diameter larger than that of an inner paper tube is arranged outside the inner paper tube formed in a cylindrical shape to constitute one paper tube.

  2. Description of the Related Art Conventionally, there is a double paper tube as a paper tube for winding a long sheet material such as a sheet-like holder holding small articles such as paper, resin film, cloth (including non-woven fabric) or electronic parts. For example, in the following Patent Document 1, a hard foamed resin is filled into a region between an inner paper tube formed in a cylindrical shape and an outer paper tube having a larger diameter than the inner paper tube, and these are integrated. A double paper tube is disclosed.

JP 2011-218557 A

  However, in the double paper tube described in Patent Document 1, since the hard foamed resin is filled between the inner paper tube and the outer paper tube, the double paper tube becomes heavy and the manufacturing process is reduced. There was a problem of complication.

  The present invention has been made to cope with the above-described problems, and it is an object of the present invention to provide a double paper tube that can be made lighter than the conventional one and can simplify the manufacturing process.

  In order to achieve the above object, the present invention is characterized in that an inner paper tube formed in a cylindrical shape, an outer paper tube formed in a cylindrical shape covering the outer peripheral surface of the inner paper tube through a space portion, and an inner paper A side surface disposed in a ring-shaped opening between the inner paper tube and the outer paper tube at each end of each of the tube and the outer paper tube, and a length corresponding to the distance between the two side surfaces in the space And an erected body that is erected between the two side bodies, and the erected body is erected between at least two locations in the circumferential direction with respect to the inner peripheral surface of the outer paper tube, and the inner paper It exists in the rod body or plate-shaped body which touches the outer peripheral part surface of a pipe | tube.

  According to the feature of the present invention configured as described above, the double paper tube is installed between the side bodies while occupying a part of the space portion in the space portion between the inner paper tube and the outer paper tube. Since the body is provided, the weight can be reduced as compared with the conventional double paper tube, and the manufacturing process can be simplified.

  In addition, the double paper tube is composed of a plate-like body in which the installation body is installed between at least two places in the circumferential direction with respect to the inner peripheral surface of the outer paper tube. By fitting, it can be stably fixed in the space, and the strength in the radial direction of the outer paper tube can be improved.

  Another feature of the present invention resides in that in the double paper tube, the installation body is bonded and fixed to one of the inner peripheral surface of the outer paper tube and the outer peripheral surface of the inner paper tube.

  Another feature of the present invention is that, in the double paper tube, the construction body is bonded and fixed to both the inner peripheral surface of the outer paper tube and the outer peripheral surface of the inner paper tube.

  Another feature of the present invention is that, in the double paper tube, the installation body bends a plate-like body extending in a strip shape, and an end portion and a bent portion of the plate-like body are respectively an inner peripheral surface of the outer paper tube. It is in a state of being in contact with.

  Another feature of the present invention is that, in the double paper tube, the installation body is formed in a polygon that is inscribed in the outer paper tube and circumscribed in the inner paper tube.

  According to another aspect of the present invention configured as described above, the double paper tube is formed in a polygon in which the installation body is inscribed in the outer paper tube and in contact with the inner paper tube. In other words, the installation body is formed in a polygonal shape in which the inner paper tube is an inscribed circle and a polygonal shape in which the outer paper tube is a circumscribed circle. In this case, the polygonal shape constituting the installation body includes a triangle, a quadrangle, a pentagon, or a hexagon. According to this, the double paper tube can be improved in strength in the radial direction of the outer paper tube and stably fixed in the space portion by configuring the construction body with an inscribed polygon. . Further, the double paper tube can improve the strength in the radial direction of the inner paper tube and can be stably fixed in the space portion by configuring the construction body with a circumscribed polygon. Furthermore, the double paper tube can further improve the rigidity of the outer paper tube and the inner paper tube in addition to the above-described effect, because the construction body is formed of an inscribed polygon and a circumscribed polygon. The outer paper tube and the inner paper tube can be more firmly integrated to prevent relative rotation between them.

  In these cases, in the double paper tube, the installation body can be a plate-like body extending along the axial direction of the inner paper tube and the outer paper tube. According to this, since the construction body is formed in a plate shape, the double paper tube can be brought into line contact or surface contact with the two side bodies provided at both ends of the double paper tube, Each side body can be stably supported.

  In these cases, in the double paper tube, the side body can be composed of two plate-like bodies that overlap each other. According to this, since the double paper tube is composed of two plate-like bodies whose side bodies overlap each other, the fixed portion when one side body of the two side bodies is fixed to the construction body (For example, an adhesion part and a fitting part) can be concealed with the other side body, and an aesthetics can be improved. In addition, when the through hole is formed in the side body, the position of the through hole in the two side bodies is shifted and attached to the inner paper tube and the outer paper tube so that the opening degree by the through hole is desired. Can be adjusted in degrees.

  Further, in these cases, in the double paper tube, the erection body can be formed in a cross beam shape that fits to the outer peripheral portion of the inner paper tube and the inner peripheral portion of the outer paper tube, respectively.

  According to this, the double paper tube is formed in a cross-beam shape in which the erected body is fitted to the outer peripheral portion of the inner paper tube and the inner peripheral portion of the outer paper tube. While being able to support each provided side part stably, both can be integrated and the relative rotation of both can be prevented, reinforcing an outer paper tube and an inner paper tube, respectively.

  Further, in these cases, in the double paper tube, the side body can have a through hole communicating with a space formed between the outer peripheral surface of the inner paper tube and the inner peripheral surface of the outer paper tube. .

According to this, the double paper tube has a through hole in which the side body communicates with the space portion, and therefore, an adhesive for fixing the construction body in the space portion is injected using the through hole. In addition, it can be used when inserting a finger or a rod into the through hole and removing the side body from the double paper tube. Further, the through hole can suppress the deterioration of the double paper tube by communicating the space portion of the double paper tube with the outside to eliminate the pressure difference.

It is a perspective view which shows the outline of the whole structure of the double paper tube concerning this invention. It is a disassembled perspective view for demonstrating the assembly | attachment state of a double paper tube shown in FIG. 1, and each component. It is a disassembled perspective view for demonstrating the assembly | attachment state of a construction body shown in FIG. 2, and each component. It is a perspective view which abbreviate | omits some components (one side body) and shows the internal structure of the double paper tube which concerns on the modification of this invention. It is a perspective view which abbreviate | omits some components (one side body) and shows the internal structure of the double paper tube which concerns on the other modification of this invention. It is a perspective view which abbreviate | omits some components (one side body) and shows the internal structure of the double paper tube which concerns on the other modification of this invention. It is a top view which abbreviate | omits some components (one side body) and shows the internal structure of the double paper tube which concerns on the other modification of this invention. It is a top view which abbreviate | omits some components (one side body) and shows the internal structure of the double paper tube which concerns on the other modification of this invention. It is a top view which abbreviate | omits some components (one side body) and shows the internal structure of the double paper tube which concerns on the other modification of this invention.

(Configuration of double paper tube 100)
Hereinafter, embodiments of a double paper tube according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view schematically showing the overall configuration of a double paper tube 100 according to the present invention. FIG. 2 is an exploded perspective view for explaining the assembled state and each component of the double paper tube 100 shown in FIG. Note that each drawing referred to in the present specification is schematically represented by exaggerating some of the components in order to facilitate understanding of the present invention. For this reason, the dimension, ratio, etc. between each drawing and each component may differ. The double paper tube 100 is a roll body that winds and holds a sheet body S that holds many small items such as small electronic components. In addition, in FIG. 1, the sheet | seat body S is shown with the dashed-two dotted line.

  The double paper tube 100 includes an inner paper tube 101. The inner paper tube 101 is a part that is detachably held by a paper tube holding shaft 90 that holds the double paper tube 100 when the sheet body S is sent out from the double paper tube 100. It is formed in an inner cylindrical shape corresponding to the shape. More specifically, the inner paper tube 101 is configured by a cylindrical body in which paper tube base paper (for example, cardboard) is stacked in a plurality of layers. In this embodiment, the inner paper tube 101 is formed of a cylindrical body having an inner diameter of 150 mm, a thickness of 4 mm, and an axial length of 100 mm. Outside the inner paper tube 101, an outer paper tube 102 is provided via a construction body 110. In FIG. 1, the paper tube holding shaft 90 is indicated by a two-dot chain line.

  The outer paper tube 102 is a cylindrical body around which the sheet body S is wound, and has an outer diameter that does not cause curling and wrinkling on the sheet body S, and covers the outer surface of the inner paper tube 101 through the space portion 103. It is formed in a cylindrical shape with an inner diameter that can be In this case, the outer paper tube 102 is formed to a thickness that can withstand the winding of the sheet S by the outer paper tube 102 alone or by reinforcement by the erected body 110. The outer paper tube 102 is formed of a cylindrical body in which paper tube base paper (for example, cardboard) is stacked in a plurality of layers. In the present embodiment, the outer paper tube 102 is formed of a cylindrical body having an outer diameter of 300 mm, a thickness of 4 mm, and an axial length of 100 mm.

  The space portion 103 is a ring-shaped cavity portion formed between the outer peripheral surface of the inner paper tube 101 and the inner peripheral surface of the outer paper tube 102. At each end of the space 103, that is, at each end of the inner paper tube 101 and the outer paper tube 102, the space portion 103 communicates with the outer space outside the inner paper tube 101 and the outer paper tube 102. Side bodies 104 are respectively provided.

  The side body 104 is a component that connects the inner paper tube 101 and the outer paper tube 102 while covering the ring-shaped openings 103a at both ends of the inner paper tube 101 and the outer paper tube 102, and is a plate-like cardboard material. Are formed in a ring shape corresponding to each opening 103a. In this case, the thickness of the side body 104 is 6 mm in this embodiment. The side body 104 is composed of an inner side body 104a disposed on the inner side and an outer side body 104b disposed on the outer side with respect to both ends of the inner paper tube 101 and the outer paper tube 102. The inner side surface body 104a and the outer side surface body 104b are fitted in the openings 103a in a state where they are overlapped with each other.

  A through hole 105 is formed on the front and back surfaces of the side body 104. The through-hole 105 is a part that connects the space portion 103 closed by the side body 104 and the external space of the double paper tube 100, and the front surface (surface facing outward) and the back surface (surface facing inward) of the side body 104. ) In a state penetrating both surfaces. In the present embodiment, the through-hole 105 is formed by cutting out each of three portions of the outer edge portion and the inner edge portion of the side body 104 into a concave arc shape. In this case, the through holes 105 are equally arranged at the outer edge and the inner edge of the side body 104, and the through holes 105 formed in the outer edge and the through holes 105 formed in the inner edge are different from each other in the circumferential direction. In other words, they are formed in a staggered arrangement at alternate positions in the circumferential direction.

  The construction body 110 is a part that is disposed in the space portion 103 and integrally connects the inner paper tube 101 and the outer paper tube 102 together with the side surface body 104, and is provided at both ends of the space portion 103 in the space portion 103. It is provided in a state where it is installed between the two side bodies 104 formed. More specifically, as shown in FIG. 3, the erection body 110 is configured by assembling four small pieces 111 formed of corrugated cardboard materials into the same rectangular plate-like bodies in a cross-beam shape.

  In this case, the erected body 110 is formed in such a size that a rectangular portion inside the cross beam circumscribes the outer peripheral surface of the inner paper tube 101, and eight ends of the cross beam contact the inner peripheral surface of the outer paper tube 102. Each size is formed. That is, the construction body 110 is formed so as to be fitted to the outside of the inner paper tube 101 and the inside of the outer paper tube 102, respectively. In this case, in the erected body 110, the eight ends of the erected body 110 and the inner peripheral surface of the outer paper tube 102 are fixed to each other by an adhesive (not shown).

  Further, the length of the erected body 110 in the axial direction of the double paper tube 100 is formed to a length corresponding to the interval between the two side bodies 104 provided at both ends of the space part 103 in the space part 103. Has been. In the present embodiment, the erection body 110 is formed to a length of 76 mm. In this case, in the erected body 110, the end surface of the erected body 110 facing the side surface body 104 and the inner side surface body 104a are bonded and fixed to each other with an adhesive (not shown).

(Manufacture of double paper tube 100)
Next, the manufacturing process of the double paper tube 100 configured as described above will be described. An operator who manufactures the double paper tube 100 first prepares the four small pieces 111 and combines the four small pieces 111 with each other to assemble the cross-girder-like construction body 110. In this case, the operator may connect the four small pieces 111 combined with each other by using a fixing tool such as an adhesive or a stapler, but the convenience of disposal after using the double paper tube 100. It may be a detachable connection inserted into each other in consideration of the above.

  Next, the operator prepares the inner paper tube 101, the outer paper tube 102, and the four side bodies 104, and assembles them together with the construction body 110. Specifically, the operator overlaps two side bodies 104 of the four side bodies 104 with each other, and arranges the inner paper tube 101 and the outer paper tube 102 on the two side bodies 104 overlapped with each other. The two side surfaces 104 are fitted into the openings 103a between the inner paper tube 101 and the outer paper tube 102, respectively.

  Next, the worker adheres and fixes the inner side surface 104 a disposed inside the two side surfaces 104 to the inner paper tube 101 and the outer paper tube 102. Specifically, the worker applies an adhesive (not shown) to the edge portions of the fitting portions of the inner paper tube 101 and the outer paper tube 102 with respect to the inner surface of the inner side body 104a. In this case, the operator once removes the outer side surface body 104b arranged outside the two side surface bodies 104 and fits the inner paper tube 101 and the outer paper tube 102 to the outer surface of the inner side surface body 104a. An adhesive (not shown) can be applied to the edge portion of the joint.

  Further, the operator injects an adhesive from the through-hole 105 formed in the outer side surface body 104b on the outer surface of the inner side surface body 104a, so that the outer surface of the inner side surface body 104a, the inner paper tube 101, and the outer paper tube. 102 may be partially bonded and fixed. Therefore, in this case, when the operator overlaps the inner side body 104a and the outer side body 104b or injects the adhesive from the through hole 105 of the outer paper tube 102, the operator The positions in the circumferential direction of the inner side surface body 104a and the outer side surface body 104b are adjusted so that the respective through holes 105 in the outer side surface body 104b are located at positions shifted from each other in the circumferential direction.

  On the other hand, the outer side surface body 104b is attached to the inner paper tube 101 and the outer paper tube 102 by fitting, and is not bonded and fixed. It may be applied to the edge portion of each fitting portion with 102 and bonded and fixed. Thereby, the side body 104 is assembled | attached to one edge part in each both ends of the inner side paper tube 101 and the outer side paper tube 102. FIG.

  Next, the operator applies an adhesive to one of the end faces of the erection body 110, and then places the erection body 110 in the space 103 between the inner paper tube 101 and the outer paper tube 102. Fit. In this case, the operator pushes the erection body 110 into the space 103 so that the one end face to which the adhesive is applied in the erection body 110 is in close contact with the inner side surface body 104a. Thereby, the construction body 110 is positioned in the axial direction of the double paper tube 100 in the space 103.

  Next, the operator applies the adhesive to the edges of the fitting portions between the eight end surfaces of the erection body 110 and the inner peripheral surface of the outer paper tube 102, thereby attaching the erection body 110 and the outer paper tube 102 to each other. Adhere and fix each other. In this case, the operator may apply the adhesive to the contact portion of the erected body 110 with the inner paper tube 101 to adhere and fix the erected body 110 and the inner paper tube 101 to each other.

  Next, the operator applies an adhesive to the other end face of the both end faces of the erection body 110, and then places one side face 104 on the other end face, and places the side face 104 on the inner side face. 104a is fitted into the opening 103a between the inner paper tube 101 and the outer paper tube 102, respectively. Then, the operator applies an adhesive (not shown) to the edge portions of the fitting portions of the inner paper tube 101 and the outer paper tube 102 with respect to the outer surface of the inner side surface body 104a disposed on the other end surface of the construction body 110. To do. Thus, the inner paper tube 101 and the outer paper tube 102 are connected to each other via the two inner side surface bodies 104a and the one erected body 110.

  Next, the operator places the remaining one side body 104 outside the inner side body 104a bonded and fixed to the inner paper tube 101 and the outer paper tube 102, and uses this side body 104 as the outer side body 104b. It fits in the opening 103a between the paper tube 101 and the outer paper tube 102, respectively. In this case, the erected body 110 is formed to have a length corresponding to the distance between the two inner side surfaces 104a provided at both ends of the double paper tube 100, so that the outer side surface 104b is in relation to the other end surface. The positions of the inner side surface body 104a and the outer side surface body 104b can be determined so as to be flush with each other.

  Further, in this case, the operator does not need to adhesively fix the outer side body 104b only by fitting the outer side body 104b into the inner paper tube 101 and the outer paper tube 102, respectively. It is also possible to apply and fix to the edge portions of the fitting portions between the tube 101 and the outer paper tube 102. In this case, when the outer side body 104b is fitted, the operator can prevent foreign matter from entering the space 103 by covering the through hole 105 in the inner side body 104a with the outer side body 104b. By these operations, the operator can complete the double paper tube 100.

(Operation of double paper tube 100)
Next, the operation of the double paper tube 100 configured as described above will be described. The double paper tube 100 is supported by a paper tube holding shaft 90 for feeding the sheet body S after the sheet body S is wound around the outer paper tube 102 by a sheet winding device (not shown). Delivery is performed. In these use states, the double paper tube 100 has such a size and shape that the construction body 110 arranged in the space portion 103 between the inner paper tube 101 and the outer paper tube 102 occupies a part of the space portion 103. Since it is comprised, it can comprise in light weight compared with the conventional double paper tube. Thereby, the double paper tube 100 can reduce the work load of the conveyance work of the double paper tube 100, the removal work to various mechanical devices, and the disposal work.

  As can be understood from the above description of the operation, according to the embodiment, the double paper tube 100 has a part of the space portion 103 in the space portion 103 between the inner paper tube 101 and the outer paper tube 102. Since the installation body 110 is provided between the inner side surface bodies 104a while occupying, the weight can be reduced as compared with the conventional double paper tube, and the manufacturing process can be simplified.

  Furthermore, in carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention. In the description of each modification, the same reference numerals are assigned to the same parts as those in the above embodiment.

  For example, in the above embodiment, the inner paper tube 101 and the outer paper tube 102 are formed in a cylindrical shape. However, the inner paper tube 101 may be formed in a cylindrical shape that can be held by the paper tube holding shaft 90, and the outer paper tube 102 may be formed in a cylindrical shape on which the sheet body S can be wound. Therefore, the inner paper tube 101 and the outer paper tube 102 can be formed in a shape other than a cylindrical shape, for example, a square shape.

  Moreover, in the said embodiment, the side body 104 and the construction body 110 were comprised with the corrugated cardboard material. However, the side body 104 and the erection body 110 can be made of a paper material other than cardboard (for example, cardboard) and can be made of a material other than the paper material (for example, a resin material).

  Moreover, in the said embodiment, the construction body 110 was comprised in the cross-beam shape. However, the construction body 110 only needs to be constructed between the two side bodies 104 arranged at both ends of the double paper tube 100, and is not necessarily limited to the above embodiment. Therefore, the erected body 110 can be configured by a bar or a plate-like object that is erected between the two side bodies 104 disposed at both ends of the double paper tube 100.

  In this case, the erected body 110 is preferably formed in a plate shape that is erected between at least two locations in the circumferential direction with respect to the inner peripheral surface of the outer paper tube 102. For example, as shown in FIG. 4, the erected body 110 can be configured by a plate-like body that is erected between two circumferential positions on the inner peripheral surface of the outer paper tube 102. Further, for example, as shown in FIG. 5, the erected body 110 can be erected between three places in the circumferential direction on the inner peripheral surface of the outer paper tube 102 by folding a plate-like body extending in a band shape in half. According to these, the installation body 110 can be stably fixed in the space portion by being fitted to the inner peripheral surface of the outer paper tube, and can also improve the strength in the radial direction of the outer paper tube.

  Further, the erected body 110 can be formed in an inscribed polygon inscribed in the outer paper tube 102 and / or a circumscribed polygon in circumscribed the inner paper tube 101. For example, as shown in FIG. 6, the erected body 110 can be disposed in the space portion 103 by bending a plate-like body extending in a belt shape at two places to form a triangular cylinder shape. In this case, the erected body 110 can be configured to contact the inner periphery of the outer paper tube 102 and / or the outer periphery of the inner paper tube 101. According to this, the double paper tube 100 can improve the strength in the radial direction of the outer paper tube 102 by the construction body 110 having an inscribed polygon, and can be stably formed in the space 103. Can be fixed.

  Further, the double paper tube 100 can improve the strength in the radial direction of the inner paper tube 101 by the construction body 110 being formed of a circumscribed polygon, and can be stably fixed in the space 103. In addition to being able to reduce the size of the erection body 110, the manufacturing cost and the total weight of the double paper tube 100 can be reduced. Further, the double paper tube 100 further improves the rigidity of the outer paper tube 102 and the inner paper tube 101 in addition to the above-described effect, because the erected body 110 is formed of an inscribed polygon and a circumscribed polygon. In addition, the outer paper tube 102 and the inner paper tube 101 can be configured more firmly and integrally to prevent relative rotation between them. 4 to 6, one of the side bodies 104 provided at both ends of the inner paper tube 101 and the outer paper tube 102 is omitted.

  In these cases, the erection body 110 can be formed in a polygonal shape other than a triangular shape, for example, a quadrangular shape, a pentagonal shape, or a hexagonal shape. Specifically, for example, as shown in FIG. 7, the erection body 110 can be disposed in the space portion 103 by bending a plate-like body extending in a strip shape at three places to form a square cylinder. In this case, as shown in FIG. 7, the erection body 110 can be configured to contact the inner periphery of the outer paper tube 102 and the outer periphery of the inner paper tube 101, and as shown in FIG. 8, It can also be configured to contact only the inner periphery of the outer paper tube 102. According to these, in the double paper tube 100, the strength in the radial direction of the outer paper tube 102 can be improved and the space portion 103 can be formed by forming the construction body 110 in an inscribed polygon in the same manner as described above. It can be stably fixed within.

  Further, as shown in FIG. 9, the erected body 110 can be configured to contact only the outer peripheral portion of the inner paper tube 101. As described above, when the erected body 110 is formed of a circumscribed polygon (see FIGS. 7 and 9), the double paper tube 100 improves the strength of the inner paper tube 101 in the radial direction as described above. In addition to being able to be stably fixed in the space portion, the size of the erection body 110 can be suppressed, so that the manufacturing cost and the total weight of the double paper tube 100 can be suppressed.

  In these cases, the erection body 110 is formed in an integral cylindrical shape that fits into the outer peripheral portion of the inner paper tube 101 (or the inner peripheral portion of the outer paper tube 102), for example, as shown in FIG. It can also be configured. According to this, in the double paper tube 100, since the erected body 110 is configured in an integral frame shape, the erected body 110 spreads when the erected body 110 is assembled (in other words, it is developed into a plate-like body). ) Can be prevented and assembly workability can be improved. Further, the erected body 110 can be formed in a shape other than a polygonal shape, for example, an elliptical shape in contact with the inner peripheral portion of the outer paper tube 102 and / or the outer peripheral portion of the inner paper tube 101.

  In the above embodiment, three semicircular through holes 105 are formed in each of the inner edge portion and the outer edge portion of the side body 104. However, the formation position, shape, and number of the through holes 105 are not limited to the above embodiment. Therefore, the through-hole 105 may be formed in an inner portion outside the inner edge portion of the side body 104 and inside the outer edge portion, or may be formed in a shape other than a circle, for example, a square shape or a long hole shape. Moreover, the through-hole 105 may be formed by two or less, and may be formed four or more. Furthermore, the through-hole 105 can be omitted without being provided at all.

  Moreover, in the said embodiment, the side body 104 comprised the inner side surface body 104a and the outer side surface body 104b. However, the side body 104 only needs to be formed so as to be disposed in the opening 103 a between the inner paper tube 101 and the outer paper tube 102. Therefore, the side body 104 can be composed of one or three or more side bodies 104.

  In the above embodiment, the side body 104 and the construction body 110 are bonded and fixed to each other, and the side body 104 is bonded and fixed to the inner paper tube 101 and the outer paper tube 102, respectively. However, the double paper tube 100 is configured such that the inner paper tube 101 and the outer paper tube 102 are connected to each other via at least one of the side body 104 and the erection body 110 and rotate together. That's fine.

  Therefore, the double paper tube 100 may be configured such that the side body 104 is fixed to the inner paper tube 101 and the outer paper tube 102, respectively, and the construction body 110 is fixed to the inner paper tube 101 and the outer paper tube 102, respectively. May be configured. In these cases, the side body 104 and the erection body 110 can be fixed to the inner paper tube 101 and the outer paper tube 102 by a method other than adhesion, for example, fixing by a stapler or fixing by fitting.

  Further, in the above-described embodiment, the side body 104 is disposed so as to be flush with both end faces of the inner paper tube 101 and the outer paper tube 102. However, the side body 104 can also be disposed so as to stick inward or project outward from both end faces of the inner paper tube 101 and the outer paper tube 102. In these cases, the erection body 110 has a length corresponding to the distance between the two side bodies 104 arranged between both ends of the double paper tube 100, in other words, a length that can be erected between the two side bodies 104. Formed.

S ... sheet body, 90 ... paper tube holding shaft,
DESCRIPTION OF SYMBOLS 100 ... Double paper tube, 101 ... Inner paper tube, 102 ... Outer paper tube, 103 ... Space part, 103a ... Opening part, 104 ... Side body, 104a ... Inner side body, 104b ... Outer side body, 105 ... Through-hole ,
110: construction body, 111 ... small piece.

Claims (5)

An inner paper tube formed in a cylindrical shape;
An outer paper tube formed in a cylindrical shape covering the outer peripheral surface of the inner paper tube through a space;
Side bodies respectively disposed in ring-shaped openings between the inner paper tube and the outer paper tube at both ends of the inner paper tube and the outer paper tube;
A construction body formed in a length corresponding to a distance between the two side bodies in the space portion and constructed between the two side bodies;
The installation body is
A rod or plate is provided between at least two locations in the circumferential direction with respect to the inner peripheral surface of the outer paper tube and is in contact with the outer peripheral surface of the inner paper tube. Double paper tube. The double paper tube according to claim 1,
The installation body is
A double paper tube, wherein the double paper tube is bonded and fixed to one of an inner peripheral surface of the outer paper tube and an outer peripheral surface of the inner paper tube. In the double paper tube according to claim 1 or 2,
The installation body is
2. A double paper tube characterized by being bonded and fixed to both an inner peripheral surface of the outer paper tube and an outer peripheral surface of the inner paper tube. In the double paper tube as described in any one of Claim 1 thru | or 3,
The installation body is
A double paper tube, wherein a plate-like body extending in a band shape is folded and arranged so that an end portion and a bent portion of the plate-like body are in contact with the inner peripheral surface of the outer paper tube. In the double paper tube as described in any one of Claim 1 thru | or 4,
The installation body is
The double paper tube is formed in a polygon inscribed in the outer paper tube and circumscribed in the inner paper tube.

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