JP2023058405A - Paper tube, frame body, partition and paper tube composite body - Google Patents

Abstract

To provide a frame body that supports a plate body by inserting the plate body in a paper tube.SOLUTION: A frame body according to the present disclosure includes multiple paper tubes, and joints for connecting the multiple paper tubes so that these multiple paper tubes may make polygonal consecutive multiple sides. Each of at least 2-tubes of the multiple paper tubes has a slit extended along a shaft and penetrating through a wall body inside and outside. The frame body further includes the plate body supported by the at least 2-paper tubes, by being inserted in the at least 2-paper tubes so that an end may penetrate through the slit provided to each of the at least 2-paper tubes.SELECTED DRAWING: Figure 4

Description

The present invention relates to a paper tube, a frame using the paper tube, a partition using the paper tube, and a paper tube composite.

"Paper tube" is a tube made of paper that can be used to "roll", "wrap", and "support" items such as toilet paper cores, packing tape cores, award certificate storage tubes, and cardboard pallets. A variety of uses can be seen centering on the three functions (see Non-Patent Documents 1 and 2). Since the paper tube is made of paper, it is lightweight and can be returned to the soil after being discarded, which has the advantage of being environmentally friendly.

2. Description of the Related Art Conventionally, as disclosed in Patent Documents 1 and 2, for example, assemblies of shelves, racks, and the like using paper tubes for supports, cross beams, and the like are known. When placing plates such as top plates and shelves in such an assembly, the plates are placed on top of the pillars, sandwiched between the upper and lower pillars, or placed on the horizontal beams. was customary.

Japanese Patent Application Laid-Open No. 09-168435 Jitsuzen Sho 60-134908

Web page of Nippon Paper Industry Co., Ltd. “Knowledge of paper tubes” (https://www.nskg.co.jp/product/tube_chisiki.html) Nippon Paper Tube Industry Co., Ltd. web page "About paper core" (http://n-shikan.co.jp/paper-core/)

The inventor of the present application thought that if the plate could be inserted into the paper tube itself used in the assembly, the assembly would be more beautiful and the plate would be stably supported. Arrived. One aspect of the present invention has been made in view of the above problems and based on the above idea, and an object thereof is to provide a paper tube into which a plate can be inserted. Another aspect of the present invention aims to provide a frame that supports a plate by inserting the plate into a paper tube. Yet another aspect of the present invention aims to provide a partition that divides the space around the support into four areas by using a paper tube as a support and inserting a plate into the paper tube. Yet another aspect of the present invention aims to provide a paper tube composite in which a plate can be inserted into the paper tube.

In order to achieve the above object, a first aspect of the present invention provides a paper tube, which extends along the axis leaving at least one of both ends along the axis, and a wall body It has a slit penetrating inside and outside.

According to this configuration, the plate can be inserted into the paper tube through the slit. Since at least one of the axial end portions of the paper tube has no slit, the strength and shape retention of the paper tube are ensured.

A second aspect of the present invention is the paper tube according to the first aspect, wherein the slit extends along the axis leaving both the ends.
According to this configuration, since there are no slits on both ends along the axis of the paper tube, the strength and shape retention of the paper tube are further enhanced.

According to a third aspect of the present invention, there is provided the paper tube according to the first aspect, wherein the slit extends along the axis while leaving one end of the two end portions and is axially symmetrical with each other. It includes two first slits, and two second slits that extend along the axis while leaving the other end of the both ends and that are axially symmetrical to each other. The two first slits and the two second slits are different in circumferential position in the paper tube.

According to this configuration, the first plate is inserted into the paper tube so as to pass through the two first slits, and the first plate is inserted into the paper tube so as to pass through the two second slits. It is possible to support the second plate body by the paper tube so as to intersect each other inside the paper tube.

According to a fourth aspect of the present invention, there is provided a frame body comprising: a plurality of paper tubes; and a connecting joint. Each of at least two of the plurality of paper tubes is a paper tube according to the first or second aspect. The frame body is inserted into the at least two paper tubes such that the ends of the frame penetrate the slits of each of the at least two paper tubes, thereby forming a plate supported by the at least two paper tubes. , and more.

According to this configuration, a paper tube is used for the beam portion of the frame, and a frame is realized in which the plate is inserted into the paper tube and supported. Such frames can be used as components of racks, shelves, and various other assemblies.

According to a fifth aspect of the present invention, there is provided a frame, comprising: a plurality of paper tubes; and a connecting joint. At least two of the plurality of paper tubes each have a slit extending along the axis and penetrating the wall inside and outside. The frame body is inserted into the at least two paper tubes such that the ends of the frame penetrate the slits of each of the at least two paper tubes, thereby forming a plate supported by the at least two paper tubes. , and more.

According to this configuration, a paper tube is used for the beam portion of the frame, and a frame is realized in which the plate is inserted into the paper tube and supported. Such frames can be used as components of racks, shelves, and various other assemblies. In this configuration, the paper tube is not limited to the paper tube according to the first or second aspect, and it is sufficient if it has a slit extending along the axis. or a paper tube in which the slit extends along the axis only in the central portion.

According to a sixth aspect of the present invention, there is provided a frame according to the fourth or fifth aspect, which is arranged at both ends of each of the at least two of the plurality of paper tubes, and It further comprises another paper tube that encloses the two ends so as to be in contact with each other.

According to this configuration, the paper tube having the slit is reinforced by other paper tubes arranged at both ends thereof.

According to a seventh aspect of the present invention, there is provided a partition comprising a paper tube used as a support and supported by the support so as to intersect with each other to divide the space around the support into four areas. A first partition plate and a second partition plate are provided. The paper tube is a paper tube according to the third aspect. The paper tube has a posture in which the one end is the upper end and the other end is the lower end. The first partition plate is inserted into the paper tube so as to pass through the two first slits. The second partition plate is inserted into the paper tube so as to pass through the two second slits. The first partition plate has a third slit extending from the upper end along the axis of the paper tube. The second partition plate has a fourth slit extending from the lower end along the axis of the paper tube. The first partition plate and the second partition plate are separated from each other inside the paper tube by the second partition plate penetrating the third slit and the first partition plate penetrating the fourth slit. intersect without interfering.

This configuration realizes a partition that divides the space around the column into four areas.

An eighth aspect of the present invention is the partition according to the seventh aspect, wherein the first partition plate and the second partition plate are made of paper.
This configuration realizes a partition in which both the struts and the partition plate are made of paper.

A ninth aspect of the present invention is a cardboard tube composite comprising a first cardboard tube and a second cardboard tube. The first paper tube has a slit, and the slit extends along the axis from one end to the other end along the axis and penetrates the wall inside and out. The second paper tube is arranged in a part of the first paper tube along the axis, and surrounds the part so as to be in contact with the part.
According to this configuration, the plate can be inserted into the first paper tube so as to penetrate the slit. Moreover, the first paper tube is reinforced by the second paper tube even though the slit of the first paper tube extends from one end to the other end.

As described above, according to one aspect of the present invention, a paper tube into which a plate can be inserted is realized. According to another aspect of the present invention, a frame supporting a plate is realized by inserting the plate into a paper tube. According to yet another aspect of the present invention, by using a paper tube as a support and inserting a plate into the paper tube, a partition that divides the space around the support into four areas is realized. According to still another aspect of the present invention, there is realized a paper tube composite in which a plate can be inserted into the paper tube.

1 is a perspective view illustrating the configuration of a paper tube according to an embodiment of the invention; FIG. FIG. 11 is a perspective view illustrating the configuration of a paper tube according to another embodiment of the present invention; FIG. 10 is a diagram illustrating the configuration of a paper tube according to still another embodiment of the present invention, where (a) is a perspective view and (b) is a side view; FIG. 2 is a plan view illustrating the configuration of a frame according to one embodiment of the present invention; FIG. 5 is a cross-sectional view of a corner of the frame illustrated in FIG. 4; FIG. 8 is a plan view illustrating the configuration of a frame according to another embodiment of the present invention; FIG. 5 is a photograph illustrating one prototype of an assembly including the frame illustrated in FIG. 4 as a component. FIG. 5 is a photograph illustrating another prototype of an assembly including the frame illustrated in FIG. 4 as a component. 5 is a photograph illustrating still another prototype of an assembly including the frame illustrated in FIG. 4 as a component. FIG. 4 is a front view illustrating a pair of partition plates that constitute the partition using the paper tube illustrated in FIG. are doing. FIG. 11 is a perspective view illustrating a partition using the paper tube illustrated in FIG. 3 and a set of partition plates illustrated in FIG. 10 ; FIG. 6 is a perspective view illustrating the paper tubes 10 and 15 used in the frame 104 illustrated in FIGS. 4 and 5, and FIG. , (b) illustrate the paper tube 15. FIG.

FIG. 1 is a perspective view illustrating the configuration of a paper tube according to one embodiment of the present invention. This paper tube 101 has a slit 3 formed in a tubular wall 1 . The slit 3 extends along the axis 5 , leaving one end (the right end in the figure) of both ends along the axis 5 , and penetrates the wall 1 from inside to outside. In the illustrated example, the paper tube 101 has a cylindrical shape. In the following embodiments, an example in which the shape of the paper tube is cylindrical will be shown, but the shape of the paper tube is not limited to the cylindrical shape in the present invention.

Since the paper tube 101 is configured in this way, it is possible to insert a plate (not shown) into the paper tube 101 so as to penetrate the slit 3 . Since there is no slit 3 in one of both ends of the paper tube 101 along the axis 5, the strength and shape retention of the paper tube 101 are ensured.

FIG. 2 is a perspective view illustrating the configuration of a paper tube according to another embodiment of the invention. In this paper tube 102, the slit 3 formed in the wall 1 extends along the axis 5, leaving both ends along the axis 5 (both the left end and the right end in the figure). In the paper tube 102 as well, it is possible to insert a plate (not shown) into the paper tube 102 so as to penetrate the slit 3 . Since the cardboard tube 102 has no slits 3 at both ends along the axis 5, the strength and shape retention of the cardboard tube 102 are further enhanced.

3A and 3B are diagrams illustrating the configuration of a paper tube according to still another embodiment of the present invention, where (a) is a perspective view and (b) is a side view. In this paper tube 103, two slits 3A and two slits 3B are formed in the wall 1. As shown in FIG. The two slits 3A extend along the axis 5, leaving one end (the right end in the figure) of both ends along the axis 5, and are located axially symmetrical with respect to the axis 5. As shown in FIG. The two slits 3B extend along the axis 5, leaving the other end (the left end in the figure) of both ends along the axis 5, and are located axially symmetrical with respect to the axis 5. As shown in FIG.

The positions of the two slits 3A and the two slits 3B in the paper tube 101 in the circumferential direction are different from each other. That is, the radial axis 7A passing through the circumferential centers of the two slits 3A and the radial axis 7B passing through the circumferential centers of the two slits 3B intersect each other. In the illustrated example, the axis 7A and the axis 7B are orthogonal to each other.

The paper tube 103 configured in this way can be used as a support for supporting plates (not shown) that intersect with each other at the intersecting portions. That is, a plate body inserted into the paper tube 103 so as to penetrate the two slits 3A and another plate body inserted into the paper tube 103 so as to penetrate the two slits 3B. , can be supported by the paper tube 103 so as to cross each other inside the paper tube 103 .

FIG. 4 is a plan view illustrating the configuration of the frame according to one embodiment of the present invention. 5 is a cross-sectional view of a corner of the frame shown in FIG. 4. FIG. The illustrated frame 104 has four paper tubes 10 of two types, long and short. The four paper tubes 10 are connected by four joints 11 so as to form continuous four sides of a square. A plate 13 is supported by the four paper tubes 10 .

The paper tube 10 may be either the paper tube 101 illustrated in FIG. 1 or the paper tube 102 illustrated in FIG. Also, the paper tube 10 may have the slit 3 extending from one end to the other end without leaving either end along the axis 5 . 4 and 5 illustrate this form as a paper tube 10. FIG. Furthermore, the paper tube 10 may have the slit 3 extending along the axis 5 only in the central portion along the axis 5 . In general, it is sufficient for the slit 3 of the paper tube 10 to extend along the axis 5 .

The slits 3 of the four paper tubes 10 are oriented so as to face the inside of the square formed by the four paper tubes 10 . The end of the plate 13 penetrates the slits 3 of the four paper tubes 10 and reaches the inside of the four paper tubes 10 . Thus, the plate 13 is supported by the four paper tubes 10 by being inserted into the four paper tubes 10 .
The width of the slit 3 is set to be the same as the thickness of the plate 13, for example. Alternatively, the width of the slit 3 may be set smaller than the thickness of the plate 13 , and the end of the plate 13 may be pushed into the slit 3 to fit the plate 13 into the paper tube 10 . Thereby, the plate 13 is stably supported by the cardboard tube 10 . Alternatively, the width of the slit 3 may be set larger than the thickness of the plate 13, and the plate 13 may be supported by the cardboard tube 10 by inserting the end of the plate 13 into the slit 3 with play. In the present disclosure, "inserted" is meant to include any form.

Another paper tube 15 is arranged at each end of each of the four paper tubes 10 . The paper tube 15 has a larger diameter than the paper tube 10 and is arranged so as to be in contact with the outer peripheral surface of the paper tube 10 . The cardboard tube 15 functions as a reinforcing member that reinforces the cardboard tube 10 . If the paper tube 10 is a paper tube in which the slit 3 extends from one end to the other without leaving any of the two ends along the axis 5, as shown in the illustrated example, the paper tube 10 A paper tube 15 that reinforces the is particularly useful.

In the example shown in the cross-sectional view of FIG. 5, the joint 11 has a cylindrical projecting portion 19 projecting from the main body portion 17 in two directions orthogonal to each other. The cardboard tube 10 and the joint 11 are connected by fitting the projecting portion 19 into the inner cavity of the cardboard tube 10 . The cardboard tube 10 and the projecting portion 19 may be fixed with an adhesive. Similarly, the paper tube 15 and the paper tube 10 may be fixed with an adhesive. The joint 11 is made of synthetic resin, for example.

The frame 104 can be used alone, but can also be used as a component of an assembly such as a rack. In order to use the frame 104 as a component of an assembly, it is desirable that the paper tube 10 forming the frame 104 has a certain rigidity. For example, the paper tube 10 preferably has a thickness of 1.5 mm or more and an inner diameter of 15 mm or more. Moreover, in order to increase the usefulness of the frame 104, the paper tube 10 preferably has a length of 90 mm or more.

FIG. 6 is a plan view illustrating the configuration of a frame according to another embodiment of the invention. The frame 105 in the illustrated example has three paper tubes 10 of two types, long and short, and two paper tubes 20 of the same length. A total of five paper tubes 10 and 20 are connected by four joints 11 so as to form five continuous sides of a hexagon. Slits 3 (not shown) are formed in the three paper tubes 10 . The plate 13 is supported by the three paper tubes 10 by inserting the plate 13 into the three paper tubes 10 so that the ends of the plate 13 pass through the slits 3 . The slits 3 may not be formed in the two paper tubes 20 that do not support the plate 13 . Desirable thicknesses, inner diameters, and lengths of the paper tubes 10 and 20 forming the frame 105 are the same as those described for the paper tube 10 forming the frame 104 .

The joint 11 illustrated in FIG. 5 can be formed not only to extend in two directions orthogonal to each other, but also to extend in two directions intersecting at various angles. Thereby, as illustrated in FIG. 6, the paper tubes 10 and 20 are connected by the joint 11 so that the paper tubes 10 and 20 form continuous plural sides of polygons (including triangles) other than squares. is also possible.
In the illustrated example, a cap 21 is connected to one end of the two short paper tubes 10 instead of the joint 11 being connected. The cap 21 has, for example, a shape in which a protrusion similar to the protrusion 19 of the joint 11 illustrated in FIG. is fitted into the inner cavity of the paper tube 10. The cap 21 is made of synthetic resin, for example.
In the frame 105 illustrated in FIG. 6 , the plate 13 is supported by three paper tubes 10 . On the other hand, it is also possible to support the plate 13 by two paper tubes 10 . For example, in FIG. 6, the cardboard tube 20 is replaced with the cardboard tube 10 of the same length, and the cardboard tube 10 is replaced with the cardboard tube 20 of the same length. By inserting the plate 13 into the paper tube 10 so that the end portion of the plate 13 penetrates the slit 3 of the paper tube 10) arranged at the position of the tube 20, the plate 13 is formed into two paper tubes 10. may be supported by In the frame body 104 illustrated in FIG. 4, the plate body 13 includes two paper tubes 10 forming the long sides of a square (two paper tubes 10 on the upper and lower sides in FIG. 4), or two paper tubes forming the short sides. It may be supported only by the cardboard tubes 10 (two left and right cardboard tubes 10 in FIG. 4).

FIG. 7 is a photograph illustrating a prototype of an assembly including the frame 104 illustrated in FIG. 4 as a component. The illustrated assembly 106 has a structure in which legs are added to the frame 104, and can be used as a screen, for example. The plate 13 is a transparent acrylic plate in the illustrated example. By using a three-way joint as the joint 11 in addition to the two-way joint illustrated in FIG. 4, an assembly having such a three-dimensional structure can be realized. As the three-way joint, for example, a shape in which the protruding portion 19 illustrated in FIG. 5 protrudes from the main body portion 17 in three directions can be used. In the illustrated example, the outer surface of the paper tube is coated with a paint that imparts a metallic luster.

FIG. 8 is a photograph illustrating another prototype of an assembly including the frame 104 illustrated in FIG. 4 as a component. The illustrated assembly 107 also has a structure in which legs are added to the frame 104 . This assembly 107 can be used, for example, as a table, stand, or the like. By using a three-way joint as the joint 11, an assembly with such a three-dimensional structure can be realized.

FIG. 9 is a photograph illustrating yet another prototype of an assembly including the frame 104 illustrated in FIG. 4 as a component. The assembly 108 in the illustrated example has a structure in which a three-tiered frame 104 is connected to four struts. This assembly 108 can be used, for example, as a rack. By using a 4-way joint in addition to a 3-way joint as the joint 11, an assembly having such a three-dimensional structure can be realized.

10A and 10B are front views illustrating a set of partition plates constituting a partition using the paper tube 103 illustrated in FIG. One and the other are illustrated. The partition plate 23 illustrated in FIG. 10A is formed with a slit 25 vertically extending downward from the horizontal center of the upper edge. In the illustrated example, the slit 25 is formed to a depth that reaches the center of the partition plate 23 in the vertical direction. Cutouts 27 and 29 are formed in the horizontal centers of the upper and lower edges, respectively. The width of the notches 27 and 29 corresponds to the outer diameter of the paper tube 103 illustrated in FIG. It corresponds to the length along axis 5 . Note that the notch 29 may not be formed as illustrated by the dotted line.

A partition plate 31 illustrated in FIG. 10B has a shape in which the partition plate 23 is turned upside down. That is, the partition plate 23 and the partition plate 31 can be manufactured to have the same shape, and can be used upside down. The partition plate 23 and the partition plate 31 can be manufactured, for example, by cutting out cardboard.

FIG. 11 is a perspective view illustrating a partition using the paper tube 103 illustrated in FIG. 3 and a pair of partition plates 23 and 31 illustrated in FIG. In this partition 109, the partition plates 23 and 31 are supported by the cardboard tubes 103 used as supports so as to intersect each other at their horizontal centers. The partition 109 thereby partitions the space around the paper tube 103 as a support into four areas.

As an example, the paper tube 103 is used in a posture in which the right end in FIG. 3A is the upper end. At this time, the partition plate 23 is inserted into the paper tube 103 from the lower end so as to penetrate the two slits 3A, and the partition plate 31 is inserted into the paper tube 103 from the upper end so as to penetrate the two slits 3B. The partition plate 23 and the partition plate 31 interfere with each other in the inner cavity of the paper tube 103 as the partition plate 31 penetrates the slit 25 of the partition plate 23 and the partition plate 23 penetrates the slit 25 of the partition plate 31. cross without The notch 27 contributes to avoiding the end of the paper tube 103 where the slits 3A and 3B are not formed and the partition plates 23 and 31 from interfering with each other.

In the illustrated example, the partition plates 23 and 31 intersect at right angles, but the intersection angle is not limited to right angles. Also, although the partition plates 23 and 31 intersect at their respective horizontal centers, they may intersect at other locations.

FIG. 12 is a perspective view illustrating the paper tubes 10 and 15 used in the frame 104 illustrated in FIGS. 4 and 5, and FIG. The body is illustrated, and (b) illustrates the paper tube 15. FIG. The cardboard tube composite 110 has a cardboard tube 10 and a cardboard tube 15 . The paper tube 10 has a slit 3 extending along the axis 5 from one end to the other end along the axis 5 and penetrating the wall 1 from inside to outside. The cardboard tube 15 is a cardboard tube that is arranged in a part of the cardboard tube 10 along the axis 5 and surrounds the part so as to be in contact with the part. In the illustrated example, the cardboard tube 15 is arranged at both ends of the cardboard tube 10 as illustrated in FIG. The paper tube 15 may be arranged anywhere along the axis 5 of the paper tube 10 as required. Also, the number of paper tubes 15 is not limited to two, and may be one or three or more. According to the paper tube composite 110 configured in this way, it is possible to insert the plate 13 into the paper tube 10 so as to penetrate the slit 3 as illustrated in FIG. 4 . Moreover, the paper tube 10 is reinforced by the paper tube 15 even though the slit 3 of the paper tube 10 extends from one end to the other end.

1 wall 3 slit 5 shaft 3A slit 3B slit 7A shaft 7B shaft 10 paper tube 11 joint 13 plate 15 paper tube 17 main body 19 protrusion 20 paper tube 21 Cap 23 Partition plate 25 Slit 27,29 Notch 31 Partition plate 101,102,103 Paper tube 104,105 Frame body 106,107,108 Assembly 109 Partition 110 Paper tube composite.

Claims (9)

A paper tube having a slit that extends along an axis, leaving at least one of both ends along the axis, and penetrates the wall from the inside to the outside. 2. The paper tube according to claim 1, wherein said slit extends along said axis leaving both said ends. The slit is
two first slits extending along the axis except for one end of the both ends and positioned axially symmetrically to each other;
and two second slits extending along the axis except for the other end of the both ends and positioned axisymmetrically with each other,
2. The paper tube according to claim 1, wherein the two first slits and the two second slits are different in circumferential position in the paper tube. a frame,
a plurality of paper tubes;
a joint that connects the plurality of paper tubes so that the plurality of paper tubes form a plurality of continuous sides of a polygon;
each of at least two of the plurality of paper tubes is the paper tube according to claim 1 or 2,
The frame is
A frame further comprising a plate body supported by the at least two paper tubes by being inserted into the at least two paper tubes so that the ends pass through the slits of each of the at least two paper tubes. . a frame,
a plurality of paper tubes;
a joint that connects the plurality of paper tubes so that the plurality of paper tubes form a plurality of continuous sides of a polygon;
each of at least two of the plurality of paper tubes has a slit extending along the axis and penetrating the wall inside and outside;
The frame is
A frame further comprising a plate body supported by the at least two paper tubes by being inserted into the at least two paper tubes so that the ends pass through the slits of each of the at least two paper tubes. . 6. The frame according to claim 4 or 5, further comprising another paper tube disposed at each end of each of said at least two of said plurality of paper tubes and surrounding said both ends so as to be in contact with said both ends. body. partition and
A paper tube used as a support,
a first partition plate and a second partition plate that divide the space around the support column into four areas by being supported by the support support so as to cross each other;
The paper tube is the paper tube according to claim 3,
The paper tube has a posture in which the one end is the upper end and the other end is the lower end,
The first partition plate is inserted into the paper tube so as to penetrate the two first slits,
The second partition plate is inserted into the paper tube so as to penetrate the two second slits,
The first partition plate has a third slit extending from the upper end along the axis of the paper tube,
The second partition plate has a fourth slit extending from the lower end along the axis of the paper tube,
The first partition plate and the second partition plate are separated from each other inside the paper tube by the second partition plate penetrating the third slit and the first partition plate penetrating the fourth slit. Partitions that intersect without interfering. 8. The partition according to claim 7, wherein said first partition and said second partition are made of paper. a first paper tube having a slit extending along the axis from one end to the other end along the axis and penetrating the wall from inside to outside;
and a second paper tube arranged in a part of the first paper tube along the axis and surrounding the part so as to be in contact with the part.

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