Traffic cone

Abstract

The present invention provides a traffic cone which can be easily assembled and disassembled, in which it is possible to replace only a cone part, which has excellent stability which placed in various locations, and which achieves both ease of fixing and separation of the cone part and a base part and strong fixing power between the cone part and the base part. A traffic cone according to the present invention comprises a flat base part 20 and a cone part 40 which is assembled to the base part 20 and which has a conical side surface that tapers toward an upper portion thereof. The base part 20 has a support ring 22 that protrudes upward and that forms a truncated cone shape which conforms with a lower end 40a of the cone part 40. The lower end 40a and the support ring 22 are fixed by a lower end fixing means 17.

Description

traffic cones

[0001] The present invention relates to a traffic cone.

[0002] Conventional assembled traffic cones are disclosed in Patent Documents 1 and 2. These traffic cones are made up of a cone portion having a side surface that tapers upward.

[0003] More specifically, the cone portion of Patent Document 1 is formed from a flexible, flat cone-forming material. The cone-forming material has a fan-shaped fan portion formed with a base that extends in an arc shape centered at the apex, a first side that extends linearly from one end of the base toward the apex, and a second side that extends linearly from the other end of the base toward the apex and is fixed to the first side. By rolling the fan portion and fixing the first side and second side, a cone portion whose lower end is defined by the base is formed.

[0004] The cone portion of Patent Document 2 has two trapezoidal side panels. The upper edges of the side panels are fixed so that the angle formed by the upper edges of the side panels can be changed. The lower edges of the side panels are fixed to the bottom panel. The bottom panel has folds formed midway between the lower edges and parallel to the lower edges. The bottom panel is designed to be folded along the lower edges and the folds.

[0005] Meanwhile, Patent Documents 3 to 6 disclose other conventional assembled traffic cones. These traffic cones consist of a base portion and a cone portion. The base portion is flat and has an upper surface and a lower surface, and the cone portion is assembled to the base portion and stands vertically from the upper surface.

[0006] More specifically, the cone portions in Patent Documents 3 to 6 are formed from a flat, flexible cone-forming material. These cone-forming materials are bent or rolled into a triangular, square, or hexagonal pyramid shape to form the cone portion. A hole is formed in the base portion. A plurality of fixing pieces or flanges for fixing to the base portion may be formed at the lower end of the cone portion. The cone portion is inserted into the hole in the base portion from below, and each fixing piece or flange is fixed to the base portion, thereby fixing it to the base portion. The base portion may also be heavy.

[0007] The traffic cones of Patent Documents 1 to 6 can be easily assembled and disassembled. Furthermore, since the cone portion and the base portion of these traffic cones are separate members, it is also possible to replace only the cone portion.

[0008] Utility Model Registration No. 3240837 Patent No. 5274646 Utility Model Registration No. 3041934 Patent No. 2946027 JP 2008-174963 JP 2000-204524

[0009] However, the traffic cones of Patent Documents 1 and 2 lack a base and therefore lack stability when placed in various locations. In contrast, the traffic cones of Patent Documents 3 to 6 have a base and are therefore stable.

[0010] However, in the traffic cones of Patent Documents 3 to 6, the cone cannot be fixed to the base unless multiple fixing pieces or flanges are formed at the lower end of the cone and these fixing pieces or flanges are fixed to the base. On the other hand, if the fixing pieces or flanges are firmly fixed to the base, for example by attaching them to the base, it becomes difficult to separate the cone from the base.

[0011] The present invention has been made in consideration of the above-mentioned conventional situation, and aims to provide a traffic cone that can be easily assembled and disassembled, allows only the cone portion to be replaced, is highly stable when placed in various locations, and is capable of both easily fixing and separating the cone portion and the base portion and providing strong fixing force between the cone portion and the base portion.

[0012] The traffic cone of the present invention is a traffic cone comprising a flat base portion having an upper surface and a lower surface, and a cone portion assembled to the base portion, rising vertically from the upper surface, and having a conical side surface tapering upward, wherein the cone portion is formed from a flat, flexible cone-forming material, the cone-forming material having a fan-shaped fan portion formed with a base edge extending in an arc centered at an apex, a first edge extending from one end of the base edge toward the apex, and a second edge extending from the other end of the base edge toward the apex and fixed to the first edge, the fan portion being formed by rounding the fan portion and fixing the first edge and the second edge together to form the cone portion whose lower end is the base, the base portion having a support ring shaped like a truncated cone that protrudes upward and is aligned with the lower end, and the lower end and the support ring are fixed by a lower end fixing means.

[0013] To assemble the traffic cone of the present invention, first, the fan portion of the cone-forming material is rolled and the first and second sides are fixed together. This results in a cone with a conical side whose bottom is the lower end. The support ring of the base and the lower end of the cone are then fixed together by the lower end fixing means.

[0014] In this way, this traffic cone can be easily assembled because the cone portion can be fixed to the base portion, eliminating the need to form multiple fixing pieces or flanges at the lower end of the cone portion and fix the fixing pieces or flanges to the base portion as in the conventional method. Furthermore, the cone portion and base portion can be firmly fixed together by the lower end fixing means, making it easy to fix the cone portion to the base portion. Furthermore, since this traffic cone has a base portion, it exhibits stability.

[0015] On the other hand, when the fixed state by the lower end fixing means is released, the lower end of the cone part comes off the support ring of the base part, and the cone part is easily separated from the base part. This makes it easy to dismantle the traffic cone. Therefore, it is also easy to separate the cone part from the base part. It is also easy to replace the cone part alone.

[0016] Therefore, the traffic cone of the present invention can be easily assembled and disassembled, only the cone portion can be replaced, and is highly stable when placed in various locations.It also achieves both ease of fixing and separating the cone portion and the base portion and strong fixing force between the cone portion and the base portion.

[0017] The lower end fixing means preferably includes a clamping ring, which protrudes upward, has a truncated conical cylindrical shape that aligns with the lower end, and clamps the lower end together with the support ring. In this case, since both the support ring and the clamping ring align with the lower end of the cone portion, the lower end of the cone portion is firmly clamped between the support ring and the clamping ring. Furthermore, when the support ring and the clamping ring are separated, the lower end of the cone portion is released from them, and the cone portion can be easily separated from the base portion. The support ring may be arranged on the outer peripheral surface of the lower end and the clamping ring on the inner peripheral surface of the lower end, or the clamping ring may be arranged on the outer peripheral surface of the lower end and the support ring on the inner peripheral surface of the lower end.

[0018] It is preferable to provide a first fixing mechanism between the base and the clamping ring to fix the clamping ring to the base. In this case, as long as the clamping ring is fixed to the base, the support ring and the clamping ring can clamp the lower end of the cone, improving the durability of the traffic cone.

[0019] The first fixing mechanism preferably comprises an engaging portion formed on the base portion and an engaged portion formed on the clamping ring that engages with the engaging portion when the clamping ring is rotated relative to the base portion about the axis of the cone portion. In this case, the base portion is turned upside down, the cone portion is placed on it, and the lower end of the cone portion is positioned on the inner peripheral surface of the support ring. Then, the clamping ring is placed on the cone portion and rotated relative to the base portion about the axis of the cone portion; this engages the engaging portion with the engaged portion, and the clamping ring can be easily fixed to the base portion.

[0020] The base portion preferably has an insertion hole that is continuous with the inner peripheral surface of the support ring. The lower end portion is preferably inserted into the support ring through the insertion hole and fixed to the support ring by a lower end fixing means. In this case, the cone portion is inserted through the insertion hole of the base portion, and the lower end portion of the cone portion is inserted into the support ring through the insertion hole of the base portion. This allows the lower end portion to be temporarily fixed by the support ring, which has a truncated conical cylindrical shape that matches the lower end portion. This facilitates the process of fixing the support ring and the lower end portion using the lower end fixing means. Furthermore, the insertion hole allows the interior of the cone portion to be open on the back side of the traffic cone, which also leads to a lighter traffic cone.

[0021] It is preferable that the clamping ring also has a communication hole that communicates with the insertion hole of the base portion. In this case, the inside of the cone portion can be opened on the back side of the traffic cone by the insertion hole and the communication hole, which also leads to a reduction in the weight of the traffic cone.

[0022] The base portion preferably includes an upper base member having a support ring and a lower base member having a clamping ring and forming an upper surface. A second fixing mechanism is preferably provided between the upper and lower base members, which fixes the upper and lower base members by stacking the upper base member on the lower base member. In this case, the upper base member is turned upside down, the cone member is placed on it, and the lower end of the cone member is positioned on the inner peripheral surface of the support ring. Then, the lower base member is placed on the upper base member, so that the outer peripheral surface of the clamping ring is positioned on the inner peripheral surface of the lower end of the cone member. Then, the upper base member, the cone member, and the lower base member are turned upside down to obtain a traffic cone. Furthermore, by fixing the upper and lower base members using the second fixing mechanism, the lower end of the cone member is clamped between the support ring of the upper base member and the clamping ring of the lower base member. When the upper base material and the lower base material are separated, the lower end of the cone portion that has been clamped between the support ring of the upper base material and the clamping ring of the lower base material is released from them, and the cone portion is easily separated from the upper base material and the lower base material.

[0023] It is preferable that the lower base member has a communication hole that communicates with the insertion hole of the upper base member. In this case, the inside of the cone portion on the back side of the traffic cone can be opened by the insertion hole and the communication hole, which also leads to a reduction in the weight of the traffic cone.

[0024] The lower end fixing means preferably has a clamping piece that is fixed to the inner peripheral surface of the support ring or the inner peripheral surface of the insertion hole and clamps the lower end together with the support ring. In this case, the lower end of the cone can be clamped between the clamping piece and the support ring of the base. This allows the lower end of the cone to be more firmly fixed to the support ring of the base.

[0025] The lower end fixing means preferably has one or more lower end support protrusions that protrude radially inward from the inner peripheral surface of the support ring or the inner peripheral surface of the insertion hole and support the lower end from below. In this case, due to the shape of the cone portion itself, the support ring prevents the cone portion from slipping upward from the base portion, and the lower end support protrusions prevent the cone portion from slipping downward from the base portion.

[0026] It is preferable that there are multiple lower end support protrusions. Each lower end support protrusion preferably protrudes radially inward from the inner peripheral surface of the support ring or the inner peripheral surface of the insertion hole. In this case, each lower end support protrusion protruding integrally from the inner peripheral surface of the support ring or the inner peripheral surface of the insertion hole can prevent the cone portion from slipping out downward from the base portion. This eliminates the need for a separate part to fasten the base portion and the cone portion, thereby reducing the number of parts and costs.

[0027] The lower end fixing means preferably has a plurality of first through holes formed through the support ring in the thickness direction, and first members inserted into the respective first through holes and passing through the lower end portion to be held in the respective first through holes. In this case, the support ring of the base portion and the lower end portion of the cone portion can be fixed more reliably by the plurality of first members.

[0028] The first member may be a screw that is held in the first through hole, or a rivet that fits into the first through hole by its own elastic deformation. These can more reliably fasten the support ring of the base portion and the lower end of the cone portion. In particular, a rivet can easily fasten the support ring of the base portion and the lower end of the cone portion by pushing it into the first through hole.

[0029] The second fixing mechanism may be a separate member such as a rubber band, wire, or clamping device, or may be built into the upper and lower base members. The second fixing mechanism preferably comprises a permanent magnet and a magnetic body that is magnetically attracted by the permanent magnet. In this case, the upper and lower base members can be easily fixed together simply by placing the upper base member on the lower base member. Furthermore, the upper and lower base members can be easily separated simply by removing the lower base member from the upper base member.

[0030] The second fixing mechanism is preferably configured by a fitting portion that fits together through elastic deformation. In this case, the upper and lower base members can be fixed together simply by fitting the fitting portion, and the upper and lower base members can be separated simply by releasing the fitting portion. This also reduces the manufacturing cost of the traffic cone.

[0031] The fan portion may have an upper edge that extends in an arc shape centered on the apex. The cone portion may have an upper end portion defined by the upper edge. In this case, for example, a cap may be provided on the upper end portion, and another component such as a light bulb may be attached to the cap.

[0032] The traffic cone preferably includes a cap that is attached to the upper end. The upper end and the cap can be fixed by an upper end fixing means. In this case, the cap can prevent foreign matter, water, etc. from entering the cone.

[0033] It is preferable that the upper end fixing means has a plurality of second through holes formed through the cap in the thickness direction, and a second member inserted into each of the second through holes and passing through the upper end portion to be held in each of the second through holes.

[0034] In this case, the cap and the upper end of the cone portion can be more reliably fixed by the multiple second members. The second members may be screws held in the second through holes, or rivets that fit into the second through holes by elastic deformation of their own. These can fix the cap and the upper end of the cone portion with high reliability. In particular, if the second members are rivets, the cap and the upper end of the cone portion can be easily fixed by pushing them into the second through holes.

[0035] The fan section may be made up of one cone-forming material or two or more cone-forming materials. When the fan section is made up of two or more cone-forming materials, waste is less likely to occur.

[0036] The base portion may be made of metal, plastic, wood, etc. If the base portion is made of metal, the weight of the base portion increases and stability is improved. If the base portion is made of plastic, the durability of the base portion is improved. If the base portion is made of bioplastic, effects such as carbon neutrality and waste reduction can be achieved. If the base portion is lightweight, a weight can be placed on the top surface. Note that when the base portion has an upper base material and a lower base material, at least one of the upper base material and the lower base material may be made of metal, plastic, wood, etc.

[0037] The cone-forming material can be formed from cardboard, paper, thin metal plate, plastic sheet, etc. Cone-forming materials made from paper or cardboard can contribute to the SDGs and reduce environmental impact compared to typical traffic cones, in which the base and cone are integrally formed from plastic. In particular, forming the cone-forming material from recycled paper facilitates resource recycling. The cone may be formed from a single sheet of cone-forming material, or multiple sheets of cone-forming material.

[0038] The traffic cone of the present invention can be easily assembled and disassembled, only the cone portion can be replaced, and is highly stable when placed in various locations. It also achieves both ease of fixing and separating the cone portion and the base portion, and strong fixing force between the cone portion and the base portion.

[0039] FIG. 1 is an exploded perspective view of a traffic cone according to a first embodiment. FIG. 2 is a plan view of a cone-forming member according to the first embodiment. FIG. 3 is a perspective view of a cone portion according to the first embodiment. FIG. 4 is a cross-sectional view of an upper base member and a lower base member according to the first embodiment before assembly. FIG. 5 is a cross-sectional view of an upper base member, a cone portion, and a lower base member according to the first embodiment after assembly. FIG. 6 is a perspective view of a traffic cone according to the first embodiment. FIG. 7 is an exploded perspective view of a traffic cone according to a second embodiment. FIG. 8 is a plan view of a cone-forming member according to the second embodiment. FIG. 9 is a perspective view of the rear surfaces of a base portion and a clamping ring according to the second embodiment before the clamping ring is rotated. FIG. 10 is a perspective view of the rear surfaces of a base portion and a clamping ring according to the second embodiment after the clamping ring is rotated. FIG. 11 is a cross-sectional view of an upper base member, a cone portion, and a clamping ring according to the second embodiment after assembly. FIG. 12 is a perspective view of a traffic cone according to the second embodiment. FIG. 13 is a perspective view of a base portion according to a third embodiment. Fig. 14 is a partial cross-sectional view of a traffic cone according to a third embodiment, showing the base portion and the cone portion in the middle of assembly. Fig. 15 is a partial cross-sectional view of a traffic cone according to a third embodiment, showing the base portion and the cone portion after assembly. Fig. 16 is a partial cross-sectional view of a traffic cone according to a third embodiment, showing the state in which the lower end of the cone portion is supported by the lower end support protrusion. Fig. 17 is a partial cross-sectional view of a traffic cone according to a fourth embodiment, showing the base portion and the cone portion in the middle of assembly. Fig. 18 is a partial cross-sectional view of a traffic cone according to a fourth embodiment, showing the base portion and the cone portion after assembly. Fig. 19 is an exploded perspective view of a traffic cone according to a fifth embodiment. Fig. 20 is a partial perspective view of a traffic cone according to a fifth embodiment, showing the base portion and the cone portion after assembly.

[0040] Hereinafter, first to fifth embodiments of the present invention will be described with reference to the drawings.

[0041] (Example 1) As shown in Figs. 1 and 6, the traffic cone of Example 1 comprises a base portion 10, a second fixing mechanism 35, a cone portion 30, and a cap 51.

[0042] The base portion 10 is composed of an upper base material 12 and a lower base material 11 .

[0043] The upper base member 12 comprises an upper base 12a having a rectangular flat plate shape and a support ring 22 protruding upward from the upper base 12a. The upper base 12a and the support ring 22 are made of a single piece of plastic. As shown in Figures 4 and 5, the peripheral surface of the upper base 12a coincides with the peripheral surface of the lower base 11a, and the bottom surface of the upper base 12a coincides with the top surface of the lower base 11a.

[0044] A circular insertion hole 12c is formed through the upper substrate 12a in the thickness direction. Iron plates 14 are integrally formed at the four corners of the upper substrate 12a. The underside of each iron plate 14 is flush with the underside of the upper substrate 12a. A circular through-hole 12d is formed in one corner of the upper substrate 12a. A protrusion 11d formed on the lower substrate 11a of the lower base material 11 is inserted into the through-hole 12d from below.

[0045] The support ring 22 is formed in a truncated conical cylindrical shape that matches the lower end 30a of the cone portion 30 (described below). More specifically, the inner peripheral surface of the support ring 22 abuts against the outer peripheral surface of the lower end 30a without any gap. The inner peripheral surface of the support ring 22 is continuous with the inner peripheral surface of the insertion hole 12c.

[0046] The lower base member 11, like the upper base member 12, is made up of a lower base portion 11a in the shape of a square flat plate and a clamping ring 17 protruding upward from the lower base portion 11a. The clamping ring 17 corresponds to the lower end fixing means. The lower base portion 11a and the clamping ring 17 are made of a single piece of plastic.

[0047] The lower base 11a has a circular through-hole 11c formed in the thickness direction. Permanent magnets 13 are integrally provided at the four corners of the lower base 11a. Each iron plate 14 and each permanent magnet 13 corresponds to a second fixing mechanism 35.

[0048] The protruding height of the support ring 22 is equal to the protruding height of the clamping ring 17 when the cone portion 30 is placed on the lower base material 11, and then the upper base material 12 is placed on top of it, the lower end portion 30a of the cone portion 30 is clamped between the clamping ring 17 and the support ring 22, and the lower base material 11 and the upper base material 12 are fixed.

[0049] The upper surface of each permanent magnet 13 is flush with the upper surface of the lower base portion 11a. As shown in Figures 1 and 6, a circular convex portion 11d is formed at one corner of the lower base portion 11a, protruding upward. A concave portion 11e is formed at another corner of the lower base portion 11a, with both side surfaces carved inward. The clamping ring 17 is formed in the shape of a truncated cone cylinder that matches the lower end portion 30a of the cone portion 30, which will be described later. More specifically, the outer peripheral surface of the clamping ring 17 is adapted to abut against the inner peripheral surface of the lower end portion 30a without any gap. The inner peripheral surface of the clamping ring 17 is continuous with the communication hole 11c.

[0050] The cone portion 30 shown in Figures 1 and 6 is formed from the flat cone-forming material 3 shown in Figure 2. The cone-forming material 3 is made of flexible recycled paper. The cone-forming material 3 has a fan-shaped fan portion 4. Advertising characters and the like are printed on the surface of the fan portion 4. The fan portion 4 has a bottom side 4a, a first side 4b, a second side 4c, and a top side 4d.

[0051] The bottom side 4a and the top side 4d extend in an arc shape centered at a virtual vertex P. The bottom side 4a is farther from the vertex P than the top side 4d. The first side 4b extends linearly from one end of the bottom side 4a toward the vertex P and is connected to one end of the top side 4d. A margin 5 is provided on the first side 4b integrally with the fan portion 4. The second side 4c extends linearly from the other end of the bottom side 4a toward the vertex P and is connected to the other end of the top side 4d. The first side 4b and the second side 4c are fixed to each other by applying an adhesive to the margin 5, for example.

[0052] The cone portion 30 is formed by rolling the fan portion 4 and fastening the first side 4b and the second side 4c. The bottom side 4a forms the lower end of the cone portion 30, and the portion several centimeters above that bottom end forms the lower end 30a of the cone portion 30. The top side 4d forms the upper end of the cone portion 30, and the portion several centimeters below that top end forms the upper end 30b of the cone portion 30. Because the cone portion 30 is made of recycled paper, it can be stored and disposed of in a crushed state, as shown in Figure 3, and is not bulky.

[0053] 1, the cap 51 is a short cylinder with a circular holding hole 51a formed therein and a ring groove 51b recessed into its outer circumferential surface. The elastic ring 52 fitted into the ring groove 51b is annular with a notch, and has two knobs 52a at both ends that the operator can spread apart with their fingers to expand the inner diameter.

[0054] To assemble this traffic cone, first, as shown in Fig. 2, the fan portion 4 of the cone-forming member 3 is rolled up and the first side 4b and the second side 4c are fixed with the adhesive margin 5. This results in the cone portion 30 having a conical side whose lower end is defined by the base 4a, as shown in Fig. 1. Then, as shown in Fig. 5, the cone portion 30 is placed on the lower base member 11, and the lower end portion 30a of the cone portion 30 is positioned on the outer peripheral surface of the clamping ring 17 of the lower base member 11. Then, the upper base member 12 is placed on the lower base member 11, so that the lower end portion 30a of the cone portion 30 is positioned on the inner peripheral surface of the support ring 22 of the upper base member 12.

[0055] In this state, the lower base material 11 and the upper base material 12 are fixed together by the magnetic attraction between the permanent magnet 13 and the iron plate 14. At this time, the convex portion 11d of the lower base material 11 and the through-hole 12d of the upper base material 12 fit together to prevent misalignment between the lower base material 11 and the upper base material 12. In this way, the lower base material 11 and the upper base material 12 are fixed together to form the base portion 10. The upper surface of the upper base material 12 is the upper surface 10a of the base portion 10, and the lower surface of the lower base material 11 is the lower surface 10b of the base portion 10.

[0056] Therefore, the lower end 30a of the cone portion 30 is sandwiched between the sandwiching ring 17 of the lower base member 11 and the support ring 22 of the upper base member 12. Both the sandwiching ring 17 and the support ring 22 are aligned with the lower end 30a of the cone portion 30, so the lower end 30a of the cone portion 30 is firmly sandwiched between the sandwiching ring 17 and the support ring 22. Therefore, the cone portion 30 rises vertically from the upper surface 10a of the base portion 10 and tapers upward around the axis.

[0057] In this way, this traffic cone can firmly fix the cone portion 30 to the base portion 10, and therefore can be easily assembled without the need to form multiple fixing pieces or flanges at the lower end of the cone portion 30 as in the conventional method and firmly fix the fixing pieces or flanges to the base portion 10. Furthermore, the cone portion 30 and the base portion 10 are easily fixed together, and the fixing force between the cone portion 30 and the base portion 10 is also strong. Furthermore, since this traffic cone has the base portion 10, it can exhibit stability.

[0058] To attach a light bulb or other light source to the traffic cone, the worker inserts the cap 51 into the lower end 30a of the cone portion 30 from the back side of the lower base material 11, exposing the ring groove 51b upward from the upper end 30b. The worker then spreads the knob 52a to position the elastic ring 52 in the ring groove 51b and releases the knob 52a. This causes the elastic ring 52 to fit into the ring groove 51b due to its elastic restoring force. The cap 51 is thus held in place on the upper end 30b of the cone portion 30. The light bulb or other light source is held in place by the retaining hole 51a.

[0059] To dismantle this traffic cone, the worker removes the elastic ring 52 from the cap 51, then inserts his or her finger into the recess 11e of the lower base member 11 and lifts the upper base member 12 from the lower base member 11. This allows the lower base member 11 and the upper base member 12 to be easily separated. As a result, the lower end portion 30a of the cone portion 30, which was clamped between the clamping ring 17 of the lower base member 11 and the support ring 22 of the upper base member 12, is released from them, and the cone portion 30 is easily separated from the lower base member 11 and the upper base member 12. In this way, the traffic cone is easily dismantled. This also makes it easy to separate the cone portion 30 from the base member 10. It is also easy to replace just the cone portion 30.

[0060] Therefore, this traffic cone can be easily assembled and disassembled, only the cone portion 30 can be replaced, it has excellent stability when placed in various locations, and it is possible to achieve both ease of fixing and separating the cone portion 30 and the base portion 10 and strong fixing force between the cone portion 30 and the base portion 10.

[0061] Furthermore, in this traffic cone, the lower base material 11 and the upper base material 12 are fixed together by the permanent magnet 13, so that the lower base material 11 and the upper base material 12 can be easily fixed together simply by placing the upper base material 12 on the lower base material 11. Furthermore, the lower base material 11 and the upper base material 12 can be easily separated simply by removing the upper base material 12 from the lower base material 11.

[0062] Furthermore, this traffic cone uses recycled paper for the cone forming material 3, reducing the amount of resin used. This contributes to the SDGs and reduces the environmental impact compared to ordinary traffic cones, while also realizing resource reuse through the use of recycled paper.

[0063] Second Embodiment As shown in FIGS. 7 and 12, a traffic cone according to a second embodiment includes a base portion 15, a clamping ring 17, a first fixing mechanism 36, a cone portion 40, and a cap 53.

[0064] The base portion 15 comprises a rectangular, flat base portion 15a and a support ring 22 protruding upward from the base portion 15a. A circular insertion hole 15c is formed through the base portion 15a in the thickness direction. Three arc-shaped openings 15d are formed in the base portion 15a adjacent to the support ring 22. The openings 15d are spaced equiangularly around the axis. Behind each opening 15d, as shown in Figures 9 and 10, a rail 15e extends to cover the opening 15d. One end of each rail 15e, i.e., the left end in Figures 9 and 10, is open. A recess 15f is formed on the top surface of each rail 15e. The rail 15e and recess 15f correspond to the engagement portion 36a.

[0065] 7 and 12, the clamping ring 17 is formed in a truncated conical cylindrical shape having a circular through-hole 11c, similar to the clamping ring 17 of the lower base member 11 in Example 1, but does not have the lower base portion 11a as in Example 1. The clamping ring 17 corresponds to the lower end fixing means.

[0066] A flange 17a is formed on the larger-diameter side of the clamping ring 17, extending circumferentially. Three arc-shaped sliders 17b are formed on the flange 17a. Each slider 17b extends in alignment with the rail 15e of the base portion 15 and is equiangularly spaced about the axis. A convex portion 17c that fits into the concave portion 15f is formed on the back side of each slider 17b, as shown in FIGS. 9 and 10. A stopper 17d is formed on one end of each slider 17b, i.e., the left end in FIGS. 9 and 10. The slider 17b, the convex portion 17c, and the stopper 17d correspond to the engaged portion 36b. The engaging portion 36a and the engaged portion 36b correspond to the first fixing mechanism 36.

[0067] The cone portion 40 shown in Figures 7 and 12 is formed from a flat cone-forming material 31 shown in Figure 8. The cone-forming material 31 is made of flexible recycled paper. The cone-forming material 31 has a fan-shaped first cone-forming material 41 and a fan-shaped second cone-forming material 42. The cone-forming material 31 has a boundary line 31a between the first cone-forming material 41 and the second cone-forming material 42, and the first cone-forming material 41 and the second cone-forming material 42 are obtained by cutting along the boundary line 31a.

[0068] Although not shown, advertising text and the like are printed on the surfaces of the first cone-forming member 41 and the second cone-forming member 42. As shown in FIGS. 7 and 12, the first cone-forming member 41 has a first base 41a, an eleventh side 41b, a twelfth side 41c, and a first top side 41d. The second cone-forming member 42 has a second base 42a, a twentiest side 42b, a twentiest side 42c, and a second top side 42d. The first base 41a and the second base 42a are examples of the "bottom" in the present invention. The eleventh side 41b and the twenty-first side 42b are examples of the "first side" in the present invention. The twelfth side 41c and the twenty-second side 42c are examples of the "second side" in the present invention. The first top side 41d and the second top side 42d are examples of the "top side" in the present invention.

[0069] 12 , the first bottom edge 41 a and the first top edge 41 d extend in an arc shape centered on a virtual vertex P. The first bottom edge 41 a is farther away from the vertex P than the first top edge 41 d. Similarly, the second bottom edge 42 a and the second top edge 42 d extend in an arc shape centered on a virtual vertex P. The second bottom edge 42 a is farther away from the vertex P than the second top edge 42 d.

[0070] The eleventh side 41b extends linearly from one end of the first base side 41a toward the apex P and is connected to one end of the first top side 41d. The eleventh side 41b is provided with a margin 6a integral with the first cone-forming member 41. The twelfth side 41c extends linearly from the other end of the first base side 41a toward the apex P and is connected to the other end of the first top side 41d. Similarly, the twenty-first side 42b extends linearly from one end of the second base side 42a toward the apex P and is connected to one end of the second top side 42d. The twenty-first side 42b is provided with a margin 6b integral with the second cone-forming member 42. The twenty-second side 42c extends linearly from the other end of the second base side 42a toward the apex P and is connected to the other end of the second top side 42d. The first cone-forming material 41 and the second cone-forming material 42 are each rolled into a semi-cylindrical shape, and the 11th side 41b of the first cone-forming material 41 and the 22nd side 42c of the second cone-forming material 42, which are adjacent to each other in the circumferential direction, are fixed by applying adhesive to the overlapping margin 6a, etc., and the 12th side 41c of the first cone-forming material 41 and the 21st side 42b of the second cone-forming material 42, which are adjacent to each other in the circumferential direction, are fixed by applying adhesive to the overlapping margin 6b, etc.

[0071] In this manner, the cone portion 40 is formed. The first base edge 41a and the second base edge 42a form the lower end of the cone portion 40, and the portion several centimeters above the lower end forms the lower end portion 40a of the cone portion 40. The first upper edge 41d and the second upper edge 42d form the upper end of the cone portion 40, and the portion several centimeters below the upper end forms the upper end portion 40b of the cone portion 40. Three rivet insertion holes 40c are formed in the upper end portion 40b. Each rivet insertion hole 40c penetrates the cone portion 40 in the thickness direction. Because the cone portion 40 is made of recycled paper, it can be stored and disposed of in a crushed state and is not bulky.

[0072] 7, the cap 53 has a low conical cylindrical shape with a disk-shaped top wall. Three second through-holes 53a are formed in the side surface of the cap 53, penetrating the cap 53 in the thickness direction.

[0073] Each second through hole 53a holds a second rivet member 54, which is a plastic push-turn rivet. The second rivet member 54 is inserted through the second through hole 53a and through a rivet insertion hole 40c formed in the upper end 40b of the cone portion 40, and is held in the second through hole 53a. The second rivet member 54 is fitted into the second through hole 53a and the rivet insertion hole 40c by its own elastic deformation, and sandwiches the cap 53 and the cone portion 40 in the thickness direction. In this way, the second rivet member 54 sandwiching the cap 53 and the cone portion 40 is held in the second through hole 53a, thereby fixing the cap 53 to the upper end 40b of the cone portion 40. The second rivet member 54 allows the cap 53 and the upper end 40b to be easily fixed with a single touch by pushing the second through hole 53a. The second rivet member 54 corresponds to the second member, and the second through-hole 53a and the second rivet member 54 correspond to the upper end fixing means.

[0074] In this way, the cap 53 is placed on the upper end 40b of the cone portion 40, closing the upper opening of the cone portion 40. The other configurations are the same as those in the first embodiment.

[0075] 7, the first and second cone-forming members 41 and 42 are each rolled into a semi-cylindrical shape, and the eleventh and second sides 41b and 42c are secured together by the overlapping margins 6a, while the twelfth and second sides 41c and 42b are secured together by the overlapping margins 6b. Thus, the first and second cone-forming members 41 and 42 form a single fan section 4, and the fan section 4 then forms the cone section 40. The resulting cone section 40 has a lower end 40a defined by the first and second base sides 41a and 42a, a conical side surface, and an upper end 40b defined by the first and second upper sides 41d and 42d.

[0076] Then, after the cap 53 is placed on the upper end 40b of the cone portion 40, the second rivet members 54 are pushed into the second through holes 53a to fix the cap 53 to the upper end 40b.

[0077] Then, the upper end 40b of the cone 40 is inserted into the insertion hole 15c from the back side of the base 15. Then, as shown in Figures 9 and 10, the clamping ring 17 is placed on the cone 40 and rotated relative to the base 15 around the axis of the cone 40. This causes the sliders 17b to slide along the rails 15e of the base 15, and the protrusions 17c fit into the recesses 15f. In this state, the stoppers 17d of the clamping ring 17 abut against one end of the rails 15e. Thus, the clamping ring 17 is fixed to the base 15. Therefore, the lower end 40a of the cone 40 is firmly clamped between the support ring 22 and the clamping ring 17. This improves the durability of the traffic cone. The upper surface of the base 15 is the upper surface 16a, and the lower surface of the base 15 is the lower surface 16b.

[0078] The stoppers 17d of the clamping ring 17 are visible from each opening 15d, and it can be seen that the clamping ring 17 is fixed to the base portion 15. If the color of the clamping ring 17 is different from the color of the base portion 15, it is easy to see that the clamping ring 17 is fixed to the base portion 15.

[0079] When the clamping ring 17 is rotated around the axis of the cone portion 40 in the opposite direction relative to the base portion 15, the support ring 22 and the clamping ring 17 are separated, the lower end portion 40a of the cone portion 40 is released from them, and the cone portion 40 is easily separated from the base portion 15. Other functions and effects are the same as those of the first embodiment.

[0080] In Example 2, the support ring 22 is positioned on the outer peripheral surface side of the lower end 40a of the cone portion 40, and the clamping ring 17 is positioned on the inner peripheral surface side of the lower end 40a of the cone portion 40, but the clamping ring 17 may also be positioned on the outer peripheral surface side of the lower end 40a of the cone portion 40, and the support ring 22 may also be positioned on the inner peripheral surface side of the lower end 40a of the cone portion 40.

[0081] Furthermore, in the second embodiment, the engaging portion 36a and the engaged portion 36b are used as the first fixing mechanism 36, but a permanent magnet and a magnetic body may be used instead of the engaging portion 36a and the engaged portion 36b.

[0082] Third Embodiment A traffic cone according to a third embodiment employs the base portion 20 shown in FIG. 13, and is provided with a cone portion 40 and a cap 53 similar to those of the second embodiment.

[0083] The base portion 20 has six lower end support protrusions 23 formed on the base 15a. Each lower end support protrusion 23 extends in an arc shape along the periphery of the insertion hole 15c and protrudes radially inward from the inner circumferential surface of the insertion hole 15c. The amount of radial inward protrusion of each lower end support protrusion 23 from the inner circumferential surface of the insertion hole 15c is equal to or slightly greater than the plate thickness of the cone portion 40. The lower end support protrusions 23 are arranged at equal intervals around the circumferential direction of the insertion hole 15c. The lower end support protrusions 23 correspond to the lower end fixing means. The upper surface of the base portion 20 is the upper surface 20a, and the lower surface of the base portion 20 is the lower surface 20b. The other configurations are the same as those of the second embodiment.

[0084] To assemble this traffic cone, for example, first obtain the cone portion 40 with the cap 53 attached, and then insert the upper end 40b of the cone portion 40 into the insertion hole 15c from below the base portion 20, as shown in Figures 14 and 15. Then, the cone portion 40 is moved upward relative to the base portion 20, and the lower end 40a of the cone portion 40 is bent upward so that it climbs over the lower end support protrusions 23, and the lower end of the cone portion 40 is positioned above the lower end support protrusions 23. As a result, as shown in Figure 16, the lower end of the cone portion 40 is supported from below by the lower end support protrusions 23, and the outer peripheral surface of the lower end 40a abuts and makes surface contact with the inner peripheral surface of the support ring 22 without any gaps. The support ring 22 has a truncated conical cylindrical shape, and the inner peripheral surface of the support ring 22 tapers in diameter as it extends upward. Therefore, the outer peripheral surface of the lower end 40a abuts and makes surface contact with the inner peripheral surface of the support ring 22, thereby preventing the cone portion 40 from slipping out upward from the support ring 22. In addition, the lower end of the cone portion 40 is supported by each lower end support protrusion 23, preventing the cone portion 40 from slipping out downward from the support ring 22.

[0085] When dismantling this traffic cone, the worker moves the cone 40 downward relative to the base 20 while bending the lower end 40a of the cone 40 so that it moves downward and climbs over each of the lower end support protrusions 23, until the lower end of the cone 40 is positioned below each of the lower end support protrusions 23. This causes the lower end 40a of the cone 40 to move downwardly away from the support ring 22, allowing the cone 40 to be easily separated from the base 20. Other effects are the same as those of the second embodiment.

[0086] Fourth Embodiment As shown in FIGS. 17 and 18, a traffic cone according to a fourth embodiment has three clamping pieces 70 fixed to a base portion 60. As shown in FIGS.

[0087] As shown in Figure 17, the base portion 60 has three lower end support protrusions 23 and three fixing holes 61 formed on the inner peripheral surface of the insertion hole 15c. The lower end support protrusions 23 are arranged at equal intervals around the circumference of the insertion hole 15c. The fixing holes 61 are recessed radially outward from the inner peripheral surface of the insertion hole 15c in the shape of a rectangular flat plate. The fixing holes 61 are arranged at equal intervals around the circumference of the insertion hole 15c. The fixing holes 61 and the lower end support protrusions 23 are arranged alternately around the circumference of the insertion hole 15c. The clamping pieces 70, the fixing holes 61, and the lower end support protrusions 23 correspond to lower end fixing means.

[0088] The three clamping pieces 70 are fixed to the respective fixing holes 61. Each clamping piece 70 has a generally L-shaped cross section and is composed of an insertion portion 71 and a clamping portion 72. That is, in this traffic cone, the three lower-end support protrusions 23 formed integrally with the inner circumferential surface of the insertion hole 15c and the clamping pieces 70 fixed to the three fixing holes 61 are arranged alternately in the circumferential direction of the insertion hole 15c and are equally spaced in the circumferential direction of the insertion hole 15c.

[0089] The insertion portion 71 and the clamping portion 72 are made of a single piece of plastic. The insertion portion 71 has a rectangular flat plate shape that fits into the fixing hole 61, and most of it is inserted into the fixing hole 61. The insertion portion 71 is fixed by fitting into the fixing hole 61, and the part exposed from the fixing hole 61 functions in the same way as the lower end support protrusion 23.

[0090] The clamping portion 72 rises from the end of the insertion portion 71 exposed from the fixing hole 61 along the inner circumferential surface of the support ring 22. The clamping portion 72 has a curved surface shape that matches the support ring 22 and the lower end portion 40a, and is in surface contact with the inner circumferential surface of the lower end portion 40a without any gaps. As a result, the clamping portion 72 clamps the lower end portion 40a of the cone portion 40 together with the support ring 22. The other configurations are the same as those of Example 3.

[0091] When assembling this traffic cone, for example, first obtain the cone portion 40 with the cap 53 fixed thereto, and then, as shown in Figure 17, insert the cone portion 40 into the insertion hole 15c from below the base portion 60 with the clamping pieces 70 not fixed in the fixing holes 61, and while bending the lower end portion 40a, position the lower end of the cone portion 40 above the lower end support protrusions 23. At this time, because the number of lower end support protrusions 23 formed integrally with the inner circumferential surface of the insertion hole 15c has been reduced to three, it is easier to position the lower end of the cone portion 40 above the lower end support protrusions 23 than in the traffic cone of Example 3.

[0092] Then, as shown in FIG. 18 , the insertion portions 71 of the clamping pieces 70 are inserted into the respective fixing holes 61. At this time, the support ring 22 and the lower end support protrusions 23 prevent the cone portion 40 from slipping out upward or downward from the base portion 60, facilitating the installation of the clamping pieces 70 into the fixing holes 61. The insertion portions 71 are then inserted into the fixing holes 61 until the clamping portions 72 abut the lower end portions 40 a of the cone portion 40 and make surface contact with the inner circumferential surface without any gaps, thereby fixing the insertion portions 71 to the fixing holes 61 by fitting them together. In this state, the lower end portions 40 a are supported from below by the lower end support protrusions 23 and the insertion portions 71, and the lower end portions 40 a are clamped between the clamping portions 72 and the support ring 22. This allows the lower end portions 40 a of the cone portion 40 to be more firmly fixed to the support ring 22 of the base portion 60.

[0093] When dismantling this traffic cone, the clamping pieces 70 are removed from the fixing holes 61, and the cone portion 40 is then moved downward relative to the base portion 60 while bending the lower end portion 40a so that the lower end portion 40a moves downward and climbs over the lower end support protrusions 23. Even during this dismantling operation, because the number of lower end support protrusions 23 has been reduced to three, it is easier to position the lower end of the cone portion 40 below the lower end support protrusions 23 than in the traffic cone of Example 3. As a result, the lower end portion 40a of the cone portion 40 is disengaged downward from the support ring 22, and the cone portion 40 can be easily separated from the base portion 60. Other functions and effects are the same as in Example 3.

[0094] Fifth Embodiment As shown in FIGS. 19 and 20, a traffic cone according to a fifth embodiment has the support ring 22 of the base portion 80 and the lower end portion 40 a of the cone portion 40 fixed together by four first screw members 90 .

[0095] Each first screw member 90 is made up of a plastic screw 91 as an external thread and a plastic nut 92 as an internal thread that screws onto the plastic screw 91. Although detailed illustration is omitted, the plastic screw 91 has a head and an externally threaded shank, and the plastic nut 92 has a flat-head screw head and an internally threaded cylindrical portion.

[0096] Furthermore, four first through holes 81 are formed in the support ring 22 of the base portion 80. Each of the first through holes 81 penetrates the support ring 22 in the thickness direction. The first through holes 81 are arranged at equal intervals in the circumferential direction of the support ring 22. The first screw member 90 corresponds to the first member, and the first through holes 81 and the first screw member 90 correspond to the lower end fixing means.

[0097] Four screw insertion holes 40e are formed in the lower end 40a of the cone portion 40 of this traffic cone. Each screw insertion hole 40e penetrates the cone portion 40 in the thickness direction. The screw insertion holes 40e are arranged at equal intervals around the circumference of the lower end 40a. The other configurations are the same as those of the third embodiment.

[0098] When assembling this traffic cone, for example, first obtain the cone portion 40 with the cap 53 fixed thereto, then insert the cone portion 40 into the insertion hole 15c from below the base portion 80, and hold the support ring 22 of the base portion 80 on the lower end portion 40a of the cone portion 40 while circumferentially aligning each first through hole 81 provided in the support ring 22 with each screw insertion hole 40e provided in the cone portion 40.

[0099] Thereafter, the female threaded cylindrical portion of the plastic nut 92 is inserted into the screw insertion hole 40e and the first through-hole 81 from inside the lower end 40a of the cone portion 40, and the male threaded shank portion of the plastic screw 91 is inserted into the first through-hole 81 from outside the support ring 22 until the male threaded shank portion is positioned inside the female threaded cylindrical portion inserted into the first through-hole 81. The flat-head screw head is then turned and tightened with a flat-head screwdriver to thread the plastic nut 92 and plastic screw 91 together. As a result, the support ring 22 and the lower end 40a are clamped between the head of the plastic screw 91 and the flat-head screw head of the plastic nut 92, firmly fixing the support ring 22 and the lower end 40a together.

[0100] To disassemble this traffic cone, simply use a flat-head screwdriver to release the plastic screws 91 and plastic nuts 92 from their threaded engagement and remove each of the first screw members 90. This allows the cone 40 to be removed downward from the base 80, making it easy to separate the two. Other effects are the same as in Example 3.

[0101] Although the present invention has been described above in accordance with Examples 1 to 5, it goes without saying that the present invention is not limited to the above Examples 1 to 5, and can be appropriately modified and applied within the scope of the spirit of the present invention.

[0102] For example, in the above-mentioned Example 1, the lower base material 11 is provided with a permanent magnet 13, and the upper base material 12 is provided with an iron plate 14 to secure the lower base material 11 and the upper base material 12 together, but if the south and north poles are reversed, it is also possible to provide permanent magnets on both the lower base material 11 and the upper base material 12. In this case, it is preferable to have the south and north poles face each other by fitting the protrusions 11d into the through holes 12d, and to prevent the south and south poles from accidentally facing each other or the north and north poles from accidentally facing each other.

[0103] In the first embodiment, the cone portion 30 is formed from one cone-forming member 3, and in the second to fifth embodiments, the cone portion 40 is formed from two cone-forming members 41 and 42, but the present invention is not limited to these. In the first embodiment, the cone portion 30 may be formed from two or more cone-forming members. In the second to fifth embodiments, the cone portion 40 may be formed from one or three or more cone-forming members.

[0104] In the above-described third embodiment, the lower end support protrusion 23 is formed integrally with the inner peripheral surface of the insertion hole 15c, but the present invention is not limited to this, and the lower end support protrusion 23 may be formed integrally with the inner peripheral surface of the support ring.

[0105] In the third embodiment, the lower end fixing means is configured by six lower end support protrusions 23, but it is possible to appropriately change the number and shape of the lower end support protrusions 23. The lower end support protrusion may also be configured by a single annular protrusion that extends annularly around the entire circumferential direction along the periphery of the insertion hole 15c and is formed integrally with the inner circumferential surface of the insertion hole 15c.

[0106] In the fourth embodiment, three lower end support projections 23 and three clamping pieces 70 are provided, but the number of lower end support projections 23 and the number of clamping pieces 70 can be changed as appropriate. Also, the lower end support projections 23 may be eliminated, and the lower end fixing means may be configured with only a plurality of clamping pieces 70.

[0107] In the fifth embodiment, the first screw member 90 is used, but instead of the first screw member, a first rivet member such as a push-turn rivet may be used.

[0108] Although the second rivet member is used in the above-described Examples 2 to 5, a second screw member may be used instead of the second rivet member. In this case, the second through hole 53a formed through the cap may be an internally threaded hole, and a male screw as the second screw member may be screwed into the second through hole 53a for fixation.

[0109] Furthermore, in the above-mentioned Examples 2 to 5, the 11th side 41b and the 22nd side 42c are fixed together by bonding with the adhesive margin 6a, and the 12th side 41c and the 21st side 42b are fixed together by bonding with the adhesive margin 6b. However, it is also possible to form a locking piece on one of the 11th side 41b and the 22nd side 42c, form a slit on the other of the 11th side 41b and the 22nd side 42c, and engage the locking piece in the slit to fix the 11th side 41b and the 22nd side 42c, or to form a locking piece on one of the 12th side 41c and the 21st side 42b, form a slit on the other of the 12th side 41c and the 21st side 42b, and engage the locking piece in the slit to fix the 12th side 41c and the 21st side 42b. The eleventh side 41b and the twenty-second side 42c may be fixed together with a stapler, or the twelfth side 41c and the twenty-first side 42b may be fixed together with a stapler. Similarly, in the first embodiment, the first side 4b and the second side 4c of the cone forming member 3 are fixed together with adhesive using the glue tab 5. However, a locking piece may be formed on one of the first side 4b and the second side 4c, a slit may be formed on the other of the first side 4b and the second side 4c, and the locking piece may be engaged in the slit to fix the first side 4b and the second side 4c. The first side 4b and the second side 4c may also be fixed together with a stapler.

[0110] If the base portions 10, 15, 20, 60, and 80 are made of plastic and the cone-forming materials 3 and 31 are made of waterproof paper, they can be used outdoors. If the cone-forming materials 3 and 31 are made of non-waterproof paper, a coating that imparts water resistance can be applied to the cone-forming materials 3 and 31 to prevent deterioration of the cone portions 30 and 40 due to rainwater.

[0111] The cone forming material 3 may be made of a translucent plastic material or the like, and a light bulb may be provided within the cone portion 30 using a cap 51, allowing the cone portion 30 to emit light from within, thereby highlighting the advertisements and promotions of the cone portion 30.

[0112] The present invention can be used for road signs and the like.

[0113] DESCRIPTION OF SYMBOLS 10a, 16a, 20a...upper surface 10b, 16b, 20b...lower surface 10, 15, 20, 60, 80...base portion 30, 40...cone portion 3, 31...cone forming material P...apex 4a, 41a, 42a...base side 4b, 41b, 42b...first side 4c, 41c, 42c...second side 4, 41, 42...sector portion 30a, 40a...lower end portion 22...support ring 17...clamping ring (lower end fixing means) 36a, 36b...first fixing mechanism (36a...engaging portion (15e...rail, 15f...recess), 36b...engaged portion (17b...slider, 17c...protrusion, 17d...stopper)) 12c, 15c...through hole 12...upper base material 11...lower base material 70... Clamping piece (lower end fixing means) 23... Lower end support protrusion (lower end fixing means) 81, 90... Lower end fixing means (81... First through hole, 90... First member (first screw member)) 13, 14... Second fixing mechanism (13... Permanent magnet, 14... Iron plate, magnetic material) 4d, 41d, 42d... Upper edge 30b, 40b... Upper end 51, 53... Cap 53a, 54... Upper end fixing means (53a... Second through hole, 54... Second member (second rivet member))

Claims

1. A traffic cone comprising a flat base having an upper surface and a lower surface, and a cone portion assembled to the base portion, rising vertically from the upper surface, and having a conical side surface tapering upward, wherein the cone portion is formed from a flat, flexible cone-forming material, the cone-forming material having a base extending in an arc from a vertex, a first side extending from one end of the base toward the vertex, and a second side extending from the other end of the base toward the vertex and fixed to the first side, the cone portion having a lower end formed by rounding the fan portion and fixing the first side and the second side, the base portion having a support ring in the shape of a truncated cone that protrudes upward and is aligned with the lower end, and the lower end and the support ring are fixed by a lower end fixing means.

2. A traffic cone according to claim 1, wherein said lower end fixing means has a clamping ring that protrudes upward, has a truncated conical cylindrical shape that matches said lower end, and clamps said lower end together with said support ring.

3. A traffic cone according to claim 2, further comprising a first fixing mechanism between said base portion and said clamping ring for fixing said clamping ring to said base portion.

4. A traffic cone as described in claim 3, wherein the first fixing mechanism comprises an engaging portion formed on the base portion and an engaged portion formed on the clamping ring that engages with the engaging portion by rotating the clamping ring relative to the base portion around the axis of the cone portion.

5. A traffic cone as claimed in claim 1, wherein the base portion has an insertion hole that is continuous with the inner peripheral surface of the support ring, and the lower end portion is inserted into the support ring through the insertion hole and fixed to the support ring by the lower end fixing means.

6. A traffic cone as described in claim 2, wherein the base portion has an upper base material that forms the upper surface and on which the support ring is formed, and a lower base material that forms the lower surface and on which the clamping ring is formed, and a second fixing mechanism is provided between the upper base material and the lower base material to fix the upper base material and the lower base material by stacking the upper base material on the lower base material.

7. A traffic cone according to claim 5, wherein the lower end fixing means has a clamping piece fixed to the inner peripheral surface of the support ring or the inner peripheral surface of the insertion hole, and clamping the lower end together with the support ring.

8. A traffic cone as claimed in claim 5 or 7, wherein the lower end fixing means has one or more lower end support protrusions that protrude radially inward from the inner peripheral surface of the support ring or the inner peripheral surface of the insertion hole and support the lower end from below.

9. A traffic cone as described in claim 5, wherein the lower end fixing means comprises a plurality of first through holes formed through the support ring in the thickness direction, and first members inserted into each of the first through holes and passing through the lower end portion to be held in each of the first through holes.

10. A traffic cone according to claim 3 or 6, wherein the first fixing mechanism or the second fixing mechanism comprises a permanent magnet and a magnetic body that is magnetically attracted by the permanent magnet.

11. A traffic cone according to claim 1, wherein the fan portion has an upper side extending in an arc shape centered on the apex, and the cone portion has an upper end portion whose upper end is defined by the upper side.

12. A traffic cone according to claim 11, further comprising a cap assembled with said upper end, said upper end and said cap being fixed together by an upper end fixing means.

13. A traffic cone as described in claim 12, wherein the upper end fixing means comprises a plurality of second through holes formed through the cap in the thickness direction, and second members inserted into each of the second through holes, passing through the upper end portion, and being held in each of the second through holes.

14. A traffic cone according to claim 1, wherein said fan section is made up of two or more of said cone-forming materials.

15. The traffic cone of claim 1, wherein said base is made of plastic.

16. A traffic cone according to claim 1, wherein said cone forming material is made of paper.

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