Frame body

Abstract

To provide a frame body which enables easy installation / removal of a plate or sheet-like accessory member and enables a position of the installed accessory member to be maintained.SOLUTION: A frame body according to the disclosure includes: a plurality of paper pipes; a plurality of joints connecting the paper pipes; and a plate or sheet-like accessory member supported by at least some of the paper pipes and the joints. At least one paper pipe of the paper pipes has a slit which extends along an axis and penetrates through the inside of a wall body to the outside. The accessory member includes: an accessory member body having a major surface; and at least one projection which projects from the major surface and is inserted into the at least one paper pipe so as to penetrate through the slit included in the at least one paper pipe to maintain a support position of the accessory member.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a frame using a paper tube. [Background technology]

[0002] A "paper tube" is a tube made from paper, and has a wide variety of uses, centered around the three functions of "winding," "wrapping," and "supporting," such as toilet paper rolls, duct tape rolls, certificate storage tubes, and cardboard pallets (see Non-Patent Documents 1 and 2). Because paper tubes are made from paper, they are lightweight and can be returned to the soil after disposal, making them environmentally friendly.

[0003] Conventionally, there have been known frames that function as furniture such as shelves and racks, using cardboard tubes for the posts, cross beams, etc., as disclosed in Patent Documents 1 and 2, for example. In such frames, in order to arrange plates such as tabletops and shelves, it has been common to place the plates on the posts, sandwich them between the upper and lower posts, or place them on the cross beams.

[0004] In response to this, the present inventor has disclosed a frame structure in which a slit is formed in a cardboard tube and a plate is inserted into the cardboard tube through this slit, thereby improving the aesthetic appearance and stably supporting the plate (Patent Document 3).The present inventor has further disclosed a further improved configuration in which a rib extending in the axial direction of the inserted cardboard tube is provided at the end of the plate inserted into the cardboard tube through the slit, thereby increasing the bending rigidity of the plate (Patent Document 4).

[0005] However, in a configuration in which the end of the plate is inserted through a slit formed in a cardboard tube, it is not easy to install or remove the plate, and it is similarly not easy to sandwich the plate between supports.On the other hand, in a configuration in which the plate is simply placed on supports, it is easy to install or remove the plate, but it is not possible to prevent the plate from shifting position or falling. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 09-168435 [Patent Document 2] Publication No. 60-134908 [Patent Document 3] Patent No. 7038454 [Patent Document 4] Patent No. 7133181 [Non-patent literature]

[0007] [Non-Patent Document 1] Nippon Paper Industries Co., Ltd. website "Paper Tube Knowledge" (https: / / www.nskg.co.jp / product / tube_chisiki.html) [Non-patent document 2] Japan Paper Tube Industry Co., Ltd. website "About Paper Tubes" (http: / / n-shikan.co.jp / paper-core / ) Summary of the Invention [Problem to be solved by the invention]

[0008] In view of the above problems, the present invention aims to provide a frame body that allows easy installation and removal of plate- or sheet-shaped accessory members and that maintains their position once installed. [Means for solving the problem]

[0009] To achieve the above object, a first aspect of the present invention provides a frame comprising a plurality of cardboard tubes, a plurality of joints connecting the plurality of cardboard tubes, and a plate- or sheet-like accessory member supported by at least some of the plurality of cardboard tubes and the plurality of joints. At least one of the plurality of cardboard tubes has a slit extending along its axis and penetrating a wall body from the inside to the outside. The accessory member has an accessory member main body having a main surface, and at least one protrusion protruding from the main surface and inserted into the at least one cardboard tube so as to penetrate the slit in the at least one cardboard tube, thereby maintaining the support position of the accessory member.

[0010] According to this configuration, the support position of the accessory is maintained by inserting at least one protrusion into a slit in at least one cardboard tube. Furthermore, the accessory can be removed by removing the protrusion from the slit. Thus, according to this configuration, the plate- or sheet-shaped accessory can be easily installed and removed, and the installed position is maintained.

[0011] A second aspect of the present invention is the frame body according to the first aspect, wherein the accessory member is plate-shaped.

[0012] With this configuration, since the accessory is plate-shaped, it can also be used as a platform for placing objects depending on the position it is supported in. Also, because the protrusions protruding from the main surface of the accessory body are inserted into the slits in the cardboard tube, unlike conventional technology in which the end of the plate itself, which corresponds to the accessory body, is inserted into the cardboard tube through the slit to support the plate, there is no inconvenience in that the accessory body is bordered by the cardboard tube into which the protrusions are inserted.

[0013] A third aspect of the present invention is the frame according to the second aspect, wherein the plurality of cardboard tubes are four cardboard tubes, the plurality of joints are four joints, and the four joints connect the four cardboard tubes so that the four cardboard tubes form the four sides of a rectangle. The at least one cardboard tube is the four cardboard tubes, and the accessory member is supported by the four joints or the four cardboard tubes. The at least one protrusion is four protrusions protruding from the main surface at an end of the plate-shaped accessory member, and each protrusion is inserted into the four cardboard tubes so as to pass through the slits of the four cardboard tubes, thereby maintaining the support position of the accessory member.

[0014] With this configuration, there are four cardboard tubes, which form the four sides of a rectangle, making it particularly convenient for application to components of various frames, including racks, shelves, and chairs. Furthermore, the protrusions on the accessory maintain the distance between the opposing cardboard tubes. This eliminates the risk of the accessory becoming unsupported and falling due to misalignment between the cardboard tube and the joint.

[0015] A fourth aspect of the present invention is the frame according to the second or third aspect, wherein each of the at least one protrusion extends along the slit into which it is inserted.

[0016] According to this configuration, the protrusion increases the bending rigidity of the attachment body.

[0017] A fifth aspect of the present invention is a frame body according to any one of the first to fourth aspects, wherein each of the at least one cardboard tube has a cardboard tube body that extends along the axis and has the slit penetrating the wall body from inside to outside, and an enclosing cardboard tube that surrounds the cardboard tube body over the entire circumference in a partial area along the axis.

[0018] According to this configuration, the surrounding paper tube prevents the cardboard tube body from deforming in a manner that would cause slits to form. In other words, the surrounding paper tube functions as a reinforcing body that reinforces the cardboard tube body.

[0019] According to a sixth aspect of the present invention, in the frame according to the first aspect, the at least one cardboard tube is two cardboard tubes arranged parallel to each other and one above the other. The accessory member has, as the at least one protrusion, a protrusion inserted into the two cardboard tubes so as to pass through the slits of the two cardboard tubes. Information is printed on the accessory member body for the purpose of transmitting information.

[0020] This configuration realizes a frame that displays information such as advertisements, guides, etc. The accessory members can be easily replaced, and the displayed information can be easily changed.

[0021] A seventh aspect of the present invention is the frame according to the first aspect, wherein the at least one cardboard tube is three or more cardboard tubes arranged parallel to each other and at a position including a vertex of a polygon when viewed from the direction along the axis. The accessory member has at least one protrusion that is inserted into the three or more cardboard tubes so as to pass through the slits of the three or more cardboard tubes. The accessory member main body is sheet-shaped, and is arranged in a single form or in a form divided into multiple pieces so as to form all sides of the polygon when viewed from the direction along the axis, thereby forming a space for accommodating a person.

[0022] This configuration realizes a frame that can be used as a temporary tent in a disaster evacuation shelter, for example. Note that a "polygon" is a shape with three or more vertices, including a triangle and a quadrangle. [Effects of the Invention]

[0023] As described above, according to the present invention, a frame is realized that allows plate-like or sheet-like accessory members to be easily installed and removed, and that maintains the position when installed. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a photograph illustrating an example of the appearance of a frame according to an embodiment of the present invention. [Figure 2] FIG. 10 is a plan view illustrating the configuration of a frame according to another embodiment of the present invention. [Figure 3] FIG. 3 is a perspective view illustrating the configuration of a cardboard tube used in the frame of FIG. 2. [Figure 4] 3 is a perspective view illustrating the configuration of an accessory member used in the frame body of FIG. 2, as viewed from below. FIG. [Figure 5] 3 is a plan cross-sectional view showing an example of the internal structure of the frame body of FIG. 2 near a joint. FIG. [Figure 6] 3 is a vertical cross-sectional view illustrating the positional relationship between a protrusion of an accessory member and a cardboard tube that receives the protrusion in the frame of FIG. 2. FIG. [Figure 7] 10A and 10B are vertical cross-sectional views illustrating another form of the protrusion. [Figure 8] 10 is a photograph illustrating the appearance of a frame according to yet another embodiment of the present invention. [Figure 9] 9 is a partial cross-sectional side view illustrating the configuration of the frame body of FIG. 8. FIG. [Figure 10] FIG. 10 is a partial cross-sectional side view illustrating the configuration of a frame according to yet another embodiment of the present invention. [Figure 11] FIG. 10 is a partial cross-sectional side view illustrating the configuration of a frame according to yet another embodiment of the present invention. [Figure 12] FIG. 10 is a plan view illustrating the configuration of a frame according to yet another embodiment of the present invention. [Figure 13] FIG. 10 is a plan cross-sectional view illustrating an example of the internal structure near a joint of a frame according to yet another embodiment of the present invention. [Figure 14] FIG. 10 is a perspective view showing yet another example of the configuration of the cardboard tube. [Figure 15] FIG. 10 is a perspective view showing yet another example of the configuration of the cardboard tube. DETAILED DESCRIPTION OF THE INVENTION

[0025] FIG. 1 is a photograph illustrating the appearance of a frame according to one embodiment of the present invention. The frame 101 in the illustrated example is configured as a wagon suitable for use in a home kitchen, an office, etc. In the frame 101, a framework is formed by connecting a large number of cardboard tubes 10 with a large number of joints 11. A rectangular frame is formed by connecting four cardboard tubes 10 with four joints 11 so as to form four continuous sides of a rectangle. The framework of the frame 101 in the illustrated example is formed by connecting such rectangular frame bodies in three stages via the cardboard tubes 10 and joints 11. In the illustrated example, the joints 11 include a two-way joint connecting two cardboard tubes 10, a three-way joint connecting three cardboard tubes 10, and a four-way joint connecting four cardboard tubes 10. In the illustrated example, the joints 11 are made of synthetic resin, as an example.

[0026] Plate- or sheet-shaped accessory members 13 are supported on the frame members of each stage that make up the frame member 101. In the illustrated example, the accessory members 13 are plate-shaped and made of synthetic resin, particularly transparent acrylic resin. In the illustrated example, the accessory members 13 form a mounting plate on which an article is placed.

[0027] FIG. 2 is a plan view illustrating the configuration of a frame according to another embodiment of the present invention. The frame 102 in the illustrated example has four cardboard tubes 10 of two different lengths. The four cardboard tubes 10 are connected by four joints 11 so as to form four continuous sides of a rectangle. Plate-shaped accessory members 13 are supported on the four cardboard tubes 10. The joints 11 are made of synthetic resin, for example. The accessory members 13 are made of synthetic resin, particularly transparent acrylic resin, for example. In the illustrated example, the joints 11 are two-way joints that connect two cardboard tubes 10. The frame 102 can be used alone, but by using a joint 11 that connects three or more cardboard tubes 10, such as a four-way joint that connects four cardboard tubes 10, the frame 102 can be used as a component of various frame bodies, such as the frame 101 illustrated in FIG. 1.

[0028] FIG. 3 is a perspective view illustrating the configuration of the cardboard tube 10 used in the frame 102. The cardboard tube 10 in the illustrated example has a cardboard tube main body 2 and an enclosing cardboard tube 15 that surrounds the cardboard tube main body 2. The cardboard tube main body 2 is made of a cardboard tube and has a slit 3 that penetrates the cylindrical wall body 1 from the inside to the outside. The slit 3 extends from one end of the wall body 1 to the other along the axis 5. The enclosing cardboard tube 15 is a cardboard tube that is arranged in a portion of the cardboard tube main body 2 along the axis 5 and surrounds this portion so as to be in contact with the outer surface of this portion. In the illustrated example, the enclosing cardboard tube 15 is arranged at both ends of the cardboard tube main body 2 in the direction of the axis 5. Although the slit 3 of the cardboard tube main body 2 extends from one end to the other, the strength and shape retention of the cardboard tube 10 are enhanced by the enclosing cardboard tube 15. In other words, the cardboard tube 15 functions as a reinforcing member that reinforces the cardboard tube main body 2. In the illustrated example, the shapes of the cardboard tube main body 2 and the surrounding cardboard tube 15 are cylindrical. In the following embodiments, an example in which the shapes of the cardboard tube main body 2 and the surrounding cardboard tube 15 are cylindrical will be shown, but the shape of the cardboard tube in the present invention is not limited to cylindrical.

[0029] FIG. 4 is a perspective view illustrating the configuration of the accessory member 13 used in the frame 102, viewed from below. The accessory member 13 has an accessory member main body 51 and protrusions 53. In the illustrated example, both the accessory member main body 51 and the protrusions 53 are plate-shaped with main surfaces. The main surface of the accessory member main body 51 has a substantially rectangular shape. The protrusions 53 protrude from the main surface of the accessory member main body 51 at end portions 52 along the four sides of the accessory member main body 51 and extend along each side. The protrusions 53 may be molded integrally with the accessory member main body 51, or may be fixed to the accessory member main body 51 with an adhesive or the like. Since the protrusions 53 extend along each side of the accessory member main body 51, the bending rigidity of the accessory member main body 51 is increased.

[0030] Returning to Figure 2, the four slits 3 on the cardboard tube body 2 of the four cardboard tubes 10 are open facing upward. The four protrusions 53 of the accessory member 13 are inserted into the four cardboard tubes 10, respectively, so as to pass through these slits 3. This allows the accessory member 13 to be supported by the four cardboard tubes 10. Because the protrusions 53 pass through the slits 3, the position of the accessory member 13 relative to the cardboard tube 10 is restricted. Furthermore, because the protrusions 53 pass through the slits 3, the distance between the opposing cardboard tubes 10 is maintained. This eliminates the risk that the cardboard tube 10 and the joint 11 will become misaligned, causing the accessory member 13 to lose support and fall.

[0031] 5 is a plan cross-sectional view showing an example of the internal structure of the frame 102 near the joint 11. In the illustrated example, the joint 11 has a cylindrical protrusion 19 protruding from the main body 17 in two directions that are perpendicular to each other. The protrusion 19 is fitted into the inner cavity of the cardboard tube main body 2, thereby connecting the cardboard tube 10 and the joint 11. The cardboard tube main body 2 and the protrusion 19 may be fixed to each other with an adhesive. Similarly, the cardboard tube main body 2 and the surrounding cardboard tube 15 may be fixed to each other with an adhesive.

[0032] The protrusion 53 of the accessory member 13 is inserted into the slit 3 of the cardboard tube main body 2. In the illustrated example, the accessory member 13 is supported on the cardboard tube 10 by the accessory member main body 51 abutting on the top of the surrounding cardboard tube 15. In the conventional technology in which the end of the plate body corresponding to the accessory member main body 51 is supported by inserting it into the cardboard tube through the slit, there was a problem in that the plate body was hemmed in by the cardboard tube 10, whose top is higher than the plate body itself. In contrast, in the frame 102, the accessory member 13 is supported so that the accessory member main body 51 is positioned above the cardboard tube 10, which solves the problem in the conventional technology.

[0033] 6(a) is a vertical cross-sectional view illustrating the positional relationship between the protrusion 53 of the accessory member 13 of the frame 102 and the cardboard tube 10 that receives the protrusion 53 through the slit 3. In the example of FIG. 6(a), the accessory member main body 51 abuts on the top of the surrounding paper tube 15, and the lower end of the protrusion 53 abuts on the bottom of the inner circumferential surface of the cardboard tube main body 2. In other words, the accessory member 13 is supported on the cardboard tube 10 by abutting on both the surrounding paper tube 15 and the cardboard tube main body 2. In the example of FIG. 6(b), the accessory member main body 51 abuts on the top of the surrounding paper tube 15, and the lower end of the protrusion 53 is floating from the bottom of the inner circumferential surface of the cardboard tube main body 2. In other words, the accessory member 13 is supported on the cardboard tube 10 by abutting only on the surrounding paper tube 15. In the example of Figure 6(c), the accessory member main body 51 is floating from the top of the surrounding cardboard tube 15, and the lower end of the protrusion 53 is in contact with the bottom of the inner circumferential surface of the cardboard tube main body 2. In other words, the accessory member 13 is supported on the cardboard tube 10 by only contacting the cardboard tube main body 2. Any of these forms can be adopted, but the form of Figure 6(a) has the advantage that the accessory member 13 is supported by many parts of the cardboard tube 10, so the allowable weight of the object that can be placed on the accessory member 13 is higher.

[0034] FIG. 7 is a vertical cross-sectional view illustrating another form of the protrusion 53. The protrusion 53 illustrated in FIG. 7(a) uses an L-shaped angle. The protrusion 53 illustrated in FIG. 7(b) uses a T-shaped angle. The T-shaped angle in the illustrated example is made by bonding two L-shaped angles together using, for example, an adhesive. These L-shaped and T-shaped angles are fixed to the accessory member main body 51 using, for example, an adhesive. It is also possible to manufacture these protrusions 53 together with the accessory member main body 51 using the same paper material as the cardboard tube 10. Note that the accessory member main body 51 in the illustrated example is plate-shaped.

[0035] FIG. 8 is a photograph illustrating the appearance of a frame according to yet another embodiment of the present invention. The frame 103 in the illustrated example is configured as a medium for presenting information such as advertisements and guides in a store or the like. The frame 103 has two cardboard tubes 10 arranged parallel to each other and one above the other. These two cardboard tubes 10 are connected to each other via two vertically extending cardboard tubes 10 and joints 11. A horizontal cardboard tube 10 that functions as the leg of the frame 103 is connected to the lower cardboard tube 10 via joints 11. In the illustrated example, slits 3 are also formed in the two vertically extending cardboard tubes 10, but this is not necessary. In the illustrated example, the cardboard tubes 10 that form the leg portions do not have slits 3, and do not have surrounding cardboard tubes 15. A cap 21 is connected to the tip of the cardboard tube 10 that forms the leg portion. The cap 21 is made of the same material as the joint 11, for example, and is fitted to the tip of the cardboard tube 10 with a structure similar to that of the joint 11. The cardboard tube 10 and the cap 21 may be fixed together by, for example, an adhesive.

[0036] FIG. 9 is a partial side cross-sectional view illustrating the configuration of the frame body 103, and shows a cross section of the cardboard tube main body 2 of the two upper and lower cardboard tubes 10. In the illustrated example, the slits 3 of the cardboard tube main body 2 of the two upper and lower cardboard tubes 10 face forward (to the right in FIG. 9). The protrusions 53 provided at both ends of the accessory member main body 51 are inserted into these slits 3, thereby supporting the accessory member 13 on the two cardboard tubes 10. Since the main surface of the accessory member main body 51 faces forward, the frame body 103 can be used as an information transmission medium for advertisements, guides, etc. by printing information on the main surface. The accessory member 13 can be easily replaced, thereby easily changing the information presented. In the illustrated example, the accessory member main body 51 is plate-shaped, but it may also be sheet-shaped.

[0037] FIG. 10 is a partial side cross-sectional view illustrating the configuration of a frame according to yet another embodiment of the present invention. Similar to frame 103, frame 104 in the illustrated example is configured as a frame for displaying information such as advertisements and guides in stores and the like. Like frame 103, frame 104 also has two cardboard tubes 10 arranged parallel to each other and one above the other. Similarly to FIG. 9, FIG. 10 also shows a cross section of the cardboard tube main body 2 of these two cardboard tubes 10. In frame 104, of the two cardboard tubes 10 arranged one above the other, the slits 3 of the upper cardboard tube 10 face upward, and the lower cardboard tube 10 has two slits 3 facing the front and back. Protrusions 53 provided at both ends of sheet-shaped accessory main body 51 are inserted into these slits 3, thereby supporting accessory 13 on the two cardboard tubes. Two accessory members 13 are prepared, one of which is supported with its accessory member body 51 facing the front, and the other of which is supported with its accessory member body 51 facing the back. By printing information on the main surface of each accessory member body 51, the frame 104 can be used as a medium for transmitting information such as advertisements and guides on both the front and back sides.

[0038] Like the protrusion 53 inserted into the slit 3 of the upper cardboard tube 10 in the illustrated example, the protrusion 53 may protrude obliquely rather than protruding at a right angle from the main surface of the accessory member main body 51. Also, the accessory member main body 51 facing the front and the accessory member main body 51 facing the back may be integrally connected. In this case, the protrusions 53 are arranged at both ends and the center of one accessory member main body 51.

[0039] FIG. 11 is a partial side cross-sectional view illustrating the configuration of a frame according to yet another embodiment of the present invention. The frame 105 in the illustrated example can accommodate people and can be used, for example, as a temporary tent in a disaster evacuation shelter. The frame 105 in the illustrated example has four cardboard tubes 10 arranged parallel to each other at four locations: the three vertices of a triangle and a point at the center of the base when viewed from the side. The slits 3 formed in the four cardboard tubes 10 all face outward from the triangle. The protrusions 53 formed on the sheet-shaped attachment member main body 51 are inserted into the slits 3, thereby supporting the attachment members 13 on the four cardboard tubes 10. In the illustrated example, the attachment member 13 is divided into two pieces, one on the front side (shown by a solid line) and one on the back side (shown by a dotted line), and the attachment member main body 51 of each attachment member 13 has protrusions 53 arranged at both ends and the center. Alternatively, the accessory member 13 may be divided into four pieces, and the protrusions 53 may be disposed at both ends of each accessory body 51. Alternatively, the accessory member 13 may be a single piece, and, for example, in the illustrated example, the accessory body 51 on the front side (represented by a solid line) and the accessory body 51 on the back side (represented by a dotted line) may be integrally connected to each other, for example, at the highest apex of a triangle.

[0040] FIG. 12 is a plan view illustrating the configuration of a frame according to yet another embodiment of the present invention. In the illustrated example, the frame 106 has the accessory member 13 of the frame 102 illustrated in FIG. 2 divided into three parts, with surrounding paper tubes 15 added between the divided accessory members 13 to function as spacers that maintain the spacing between the accessory members 13. The added surrounding paper tubes 15 may also be fixed to the surrounding cardboard tube main body 2 with an adhesive or the like, or may be slidable without being fixed. Unlike the frame 102, the accessory member main body 51 of the accessory member 13 is supported directly by the cardboard tube main body 2, not by the surrounding paper tube 15. In this way, the accessory member 13 can be divided appropriately and the surrounding paper tubes 15 can be used as spacers between them.

[0041] 13 is a plan cross-sectional view illustrating the internal structure near the joint of a frame according to yet another embodiment of the present invention. In the frame 107 of the illustrated example, the joint 11 has a tubular protrusion 63 protruding from the main body 17 in two directions perpendicular to each other. The protrusion 63 is fitted into the outer peripheral surface of the cardboard tube 10 that does not include the surrounding cardboard tube 15, thereby connecting the cardboard tube 10 and the joint 11. The cardboard tube 10 and the protrusion 63 may be fixed with an adhesive. The protrusion 53 of the accessory member 13 is inserted into the slit 3 of the cardboard tube 10. In the illustrated example, the accessory member 13 is supported by the joint 11 by the accessory member main body 51 abutting the top of the protrusion 63 of the joint 11. In this way, the accessory member 13 may be supported by the joint 11 instead of being supported by the cardboard tube 10 (i.e., the cardboard tube main body 2 or the surrounding cardboard tube 15).

[0042] Figure 14 is a perspective view showing yet another example of the configuration of a cardboard tube. In the cardboard tube 10 of the illustrated example, the slits 3 formed in the wall body 1 extend along the axis 5, leaving both end portions of the wall body 1 (both the left and right ends in the figure). The cardboard tube 10 of the illustrated example has no slits 3 at either end portion in the direction of the axis 5, so it has improved strength and shape retention compared to the cardboard tube main body 2 illustrated in Figure 3. For this reason, even without the surrounding cardboard tube 15 at both ends, it can obtain strength and shape retention equivalent to the cardboard tube 10 illustrated in Figure 3.

[0043] Figure 15 is a perspective view showing yet another example of the configuration of a cardboard tube. In the cardboard tube 10 of the illustrated example, the slits 3 formed in the wall body 1 extend along the axis 5, leaving only one of the two end portions of the wall body 1 (the right end portion in the figure). The cardboard tube 10 of the illustrated example does not have a slit 3 at one of the two end portions in the direction of the axis 5, so its strength and shape retention are correspondingly improved compared to the cardboard tube main body 2 illustrated in Figure 3.

[0044] (Other embodiments) In the frames 101 and 102 illustrated in Figures 1 and 2, the plate-shaped accessory member 13 has four protrusions 53, which are inserted into the slits 3 of the four cardboard tubes 10. In contrast, the accessory member 13 may have only one protrusion 53, which is inserted into the slit 3 of one cardboard tube 10. In this form as well, the support position of the accessory member 13 is maintained.

[0045] 9 and 10, for example, the lower protrusion 53 may be omitted and only the upper protrusion 53 may be provided. In this configuration, the supporting position of the accessory member 13 is maintained. [Explanation of symbols]

[0046] 1 wall body, 2 cardboard tube body, 3 slit, 5 shaft, 10 cardboard tube, 11 joint, 13 accessory member, 15 surrounding cardboard tube, 17 main body, 19 protrusion, 51 accessory member body, 52 end, 53 protrusion, 63 protrusion, 101, 102, 103, 104, 105, 106, 107 frame body.

Claims

1. A plurality of paper tubes; A plurality of joints for connecting the plurality of cardboard tubes; A plate-shaped or sheet-shaped accessory member is supported by at least a portion of the plurality of cardboard tubes and the plurality of joints, At least one of the plurality of cardboard tubes has a slit extending along an axis and penetrating a wall body from inside to outside, The accessory member is An accessory member body having a main surface; A frame body having at least one protrusion body protruding from the main surface and inserted into the at least one cardboard tube so as to penetrate the slit of the at least one cardboard tube, thereby maintaining a supporting position of the accessory member.

2. The frame according to claim 1 , wherein the accessory member is plate-shaped.

3. The plurality of cardboard tubes are four cardboard tubes, the plurality of joints is four joints, The four joints connect the four paper tubes so that the four paper tubes form four sides of a rectangle, The at least one cardboard tube is the four cardboard tubes, The accessory member is supported by the four joints or the four cardboard tubes, 3. The frame according to claim 2, wherein the at least one protrusion is four protrusions protruding from the main surface at an end of the plate-shaped accessory member, and each of the protrusions is inserted into the four cardboard tubes so as to penetrate the slits of the four cardboard tubes, thereby maintaining a support position of the accessory member.

4. The frame according to claim 2 , wherein each of the at least one protrusion extends along the slit into which it is inserted.

5. Each of the at least one cardboard tube comprises: a cardboard tube body having the slit extending along the axis and penetrating the wall body from inside to outside; The frame according to claim 1 , further comprising: a surrounding paper tube that surrounds the paper tube main body over an entire circumference in a partial region along the axis.

6. The at least one cardboard tube is two cardboard tubes arranged parallel to each other and above and below each other, The accessory member has, as the at least one protrusion, a protrusion inserted into the two cardboard tubes so as to penetrate the slits of the two cardboard tubes, The frame according to claim 1 , wherein the accessory member body is printed with information for the purpose of transmitting information.

7. The at least one cardboard tube is three or more cardboard tubes arranged parallel to each other and at positions including vertices of a polygon when viewed from a direction along the axis, The accessory member has, as the at least one protrusion, a protrusion inserted into the three or more cardboard tubes so as to penetrate the slits of the three or more cardboard tubes, The frame body described in claim 1, wherein the accessory member main body is sheet-shaped and is arranged in a single form or in a form divided into multiple parts so as to form all sides of the polygon when viewed in a direction along the axis, thereby forming a space for accommodating a person.

Images