Cone bar

Abstract

To provide a durable cone bar which can be prevented from being bulky at the time of storage and transportation and in which the locking work of a cone locking part to a triangular cone can be easily performed.SOLUTION: A pair of through-holes 25 are provided at one end portion of the small-diameter cylinder portion 21 and the other end portion of the large-diameter cylinder portion 22, respectively, which constitute the tube main body 2, while both end portions of the elastic wire material 31 having an outer diameter smaller than that of the through-holes 25 and having the resin-coated layer 31b as an outer layer are inserted into the cylinder via the pair of through-holes 25, the resin-coated layers 31b are thermally fused to each other in an overlapped state in the cylinder, and after the outer side of the overlapped portion 31c is covered with the heat-shrinkable tube 23, the heat-shrinkable tube 23 is thermally shrunk to bring both end portions into a connected state. Ring-shaped cone locking parts 3a, 3b are formed rotatably around a pair of through-holes 25 by elasticity of an elastic wire material 31.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a cone bar that is stretched between triangular cones. [Background technology]

[0002] BACKGROUND ART Triangular cones and traffic cone bars have been used for some time to easily separate construction sites from sidewalks and the like, or to easily define queue routes at event venues and the like. In other words, the cone bar comprises a bar body and cone fitting ring portions (sometimes called "hoops" on site) provided on both ends of the bar body, with one cone fitting ring portion engaged with the top of one triangular cone and the other cone fitting ring portion fitted into the top of the other triangular cone, thereby preventing passage between the triangular cones.

[0003] Conventional cone bars consist of a cylindrical resin bar body, a bottomed cylindrical fitting tube portion, and a cone fitting ring portion forming member having a cone fitting ring portion formed integrally with the bottom of the fitting tube portion. The cone fitting ring portion forming member is formed by fitting the fitting tube portion to the end of the bar body, and then gluing or screwing the fitting tube portion to the bar body (see Patent Document 1). However, in the case of this conventional cone bar, the ring-shaped cone fitting portion is fixed in a state where it protrudes from the end of the bar body outward in the axial direction of the bar body, which causes the problem of it being bulky when stored or transported.

[0004] On the other hand, cone bars, which are bamboo sticks with looped strings made of natural materials attached to the ends, are sold online (Non-Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-31849 [Non-patent literature]

[0006] [Non-Patent Document 1] Askul online store: Trusco Nakayama bamboo guard bars [searched July 1, 2024], Internet URL: <https: / / www.askul.co.jp / p / U611144 / ?sc#e=cp#p#as#go#pl#c#law#c#U611144&utm#source=go&utm#medium=PLA&utm#campaign=PLA#SSC#All&gad#source=1&gclid=EAIaIQobChMIiovn8PiEhwMVb1wPAh3lwAsZEAQYBCABEgJMgfD#BwE> Summary of the Invention [Problem to be solved by the invention]

[0007] In the case of the cone bar sold online, the cone fitting ring is made of a string made of natural materials, so it is flexible and foldable, making it compact when stored or transported. However, since the cord is made of natural fibers, there are problems with durability, and the cone fitting ring portion must be opened by hand while being engaged with the triangular cone, which results in poor workability.

[0008] The present invention has been made in consideration of such conventional problems, and aims to provide a durable cone bar that is not bulky when stored or transported, and allows the cone fitting ring portion to be easily fitted into the triangular cone. [Means for solving the problem]

[0009] In order to achieve the above object, the cone bar of the present invention is a cone bar having a bar body and approximately ring-shaped cone fitting rings provided at both ends of the bar body, wherein the bar body has at least a cylindrical portion at both ends, and the cylindrical portion has a pair of through holes in its end wall surface at symmetrical positions on either side of the central axis of the cylindrical portion, and the cone fitting ring is characterized in that a single elastic wire material having a diameter smaller than that of the through holes is inserted into the pair of through holes, and a ring portion is formed outside the bar body by the elastic force of the elastic wire material, and is held by the bar body.

[0010] In the cone burr of the present invention, the elastic filament material is not particularly limited as long as it has an elastic restoring force that allows it to remain in a ring shape when formed into a ring. Examples include twisted threads or coil springs made of natural or synthetic fibers coated with a corrosion-resistant resin such as polyethylene, and wires made of resin elastomers such as polyethylene, and reinforcing fibers may be dispersed in the resin.

[0011] In the cone bar of the present invention, the method for forming the cone fitting pipe portion using the elastic filament material is not particularly limited, but examples thereof include the following methods. (1) A method in which an elastic wire material is inserted into a pair of through holes, and both ends of the elastic wire material are inserted into a metal sleeve used for electrical installations, in an overlapping or butting state, and the metal sleeve is crimped to fix both ends of the wire material at the overlapping or butting portions. (2) A method in which an elastic wire material is inserted into a pair of through holes, and both ends of the elastic wire material are inserted into, for example, a heat-shrinkable resin tube in an overlapping or butted state, and the resin tube is heat-shrunk to fix the material. (3) A method in which an elastic wire material is inserted into a pair of through holes, and both ends of the wire material are overlapped, and the overlapped portions are glued or fused. (4) A method in which one end of an elastic wire material is brought into the bar body through one of the through holes, and a retaining material having a diameter larger than the through hole is fixed to the one end within the bar body, and the other end of the elastic wire material is brought into the bar body through the other through hole, and a retaining material having a diameter larger than the through hole is fixed to the other end within the bar body. The abutted state mentioned above includes not only the state in which both end faces of the filament material are in close contact with each other, but also the state in which there is a small gap between them. [Effects of the Invention]

[0012] As described above, the cone bar of the present invention is a cone bar having a bar body and approximately ring-shaped cone fitting rings provided on both ends of the bar body, wherein the bar body has at least a cylindrical portion on both ends, and the cylindrical portion has a pair of through holes in its end wall surface at symmetrical positions on either side of the central axis of the cylindrical portion, and the cone fitting ring has a single elastic wire member having a diameter smaller than that of the through holes inserted into the pair of through holes, and a ring portion is formed on the outside of the bar body by the elastic force of the elastic wire member and is held by the bar body.Therefore, the cone fitting ring can be selected between an in-use position in which it can be engaged with the cone and a folded position in which it fits along the bar body, and when in the folded position, it is not bulky during storage or transportation, and when in the in-use position, the cone fitting ring is held in a ring shape, making it easy to fit into the cone. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a perspective view of one embodiment of a cone burr of the present invention. FIG. [Figure 2] FIG. 2 is a partially cutaway plan view of the cone bar of FIG. 1. [Figure 3] FIG. 2 is a partially cutaway front view of the cone bar of FIG. 1. [Figure 4] 2 shows the cone bar of FIG. 1 in a contracted state, with FIG. 2(a) being a plan view and FIG. 2(b) being a front view. [Figure 5] 2 shows the state in which the cone bar of FIG. 1 is contracted and the cone fitting ring portion is folded, FIG. 2(a) is a plan view thereof, and FIG. 2(b) is a front view thereof. [Figure 6] 2 is a cross-sectional view illustrating the structure for locking the ends of the small-diameter cylindrical portion and the large-diameter cylindrical portion of the cone bar in FIG. 1. FIG. [Figure 7] 2 is a diagram illustrating the arrangement of stoppers and through holes in a small-diameter cylindrical portion of the cone bar in FIG. 1. FIG. [Figure 8] 2 is a diagram for explaining a cross section of an end connection structure of an elastic wire member in a cone locking portion of the cone bar in FIG. 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] The present invention will be described in detail below with reference to the drawings showing embodiments thereof. 1 to 5 show one embodiment of the cone bar of the present invention.

[0015] As shown in FIGS. 1 to 5, this cone bar 1 includes a bar body 2, a first cone fitting ring portion 3a, and a second cone fitting ring portion 3b. The bar body 2 includes a small diameter cylindrical portion 21 and a large diameter cylindrical portion 22 .

[0016] As shown in FIG. 6, the small diameter cylindrical portion 21 includes a small diameter cylindrical portion main body 21a and a first locking cylindrical portion 21b. The small-diameter cylindrical portion main body 21a is cylindrical and has a pair of stoppers 23 near one end (opposite the enlarged diameter portion 21) at symmetrical positions across the central axis of the small-diameter cylindrical portion 21, as shown in Figure 7, which abut against the end face of the second cylindrical portion 22d described later, and is intermittently wrapped around the periphery with reflective tape 24 of a different color than the small-diameter cylindrical portion 21a. Although not shown, the stopper 23 is fixed to the small diameter cylindrical portion 21a by inserting the needle foot portion of a synthetic resin stopper pin into an insertion hole provided near one end of the small diameter cylindrical portion 21a and crushing the needle foot portion from the inside of the small diameter cylindrical portion 21a with a hot iron or the like.

[0017] 7, a pair of substantially circular through-holes 25 are drilled in the small-diameter cylindrical portion main body 21a at positions symmetrical about the central axis of the small-diameter cylindrical portion 21, closer to one end than the stopper 23 located near one end. Although not shown, the inner edges of the through-holes 25 at both ends are chamfered to prevent damage to the wire material 31 described below. The first locking tube portion 21b expands in diameter from the tube portion main body 21 connected to the large diameter tube portion 22 side of the small diameter tube portion main body 21a, and is equipped with a first tapered tube portion 21c whose maximum diameter is smaller than the inner diameter of the large diameter tube portion main body 22a described below, and a first cylindrical portion 21d connected to the maximum diameter portion of the first tapered tube portion 21c and having the same diameter as the maximum diameter portion of the first tapered tube portion 21c.

[0018] As shown in FIG. 6, the large diameter cylindrical portion 22 includes a large diameter cylindrical portion main body 22a and a second locking cylindrical portion 22b. The large diameter cylindrical portion main body 22a has a cylindrical shape with an inner diameter that allows the first locking cylindrical portion 21b to slidably fit therein.

[0019] In addition, the large diameter cylindrical portion main body 22a, like the small diameter cylindrical portion main body 21a, has reflective tape 24 wound intermittently around it, and the other end (opposite the small diameter cylindrical portion 21) has a pair of approximately circular chamfered through holes 25 drilled therein, like the small diameter cylindrical portion 21.

[0020] The second locking tube portion 22b is connected to the end of the large diameter tube portion main body 22a on the small diameter tube portion 21 side, and gradually tapers down in diameter from the large diameter tube portion main body 21a. The second locking tube portion 22b is equipped with a second tapered tube portion 22c whose minimum inner diameter is smaller than the maximum diameter of the first tapered tube portion 21c and larger than the outer diameter of the large diameter tube portion main body 22a, and a second cylindrical portion 22d connected to the minimum diameter side of the second tapered tube portion 22c and having the same diameter as the minimum diameter side of the second tapered tube portion 22c.

[0021] The bar main body 2 is configured as described above and can be set in an extended state shown in Figures 1 to 3 or a contracted state shown in Figures 4 and 5. When in the extended state, as shown in Figure 6, the outer peripheral wall of the first tapered cylindrical portion 21c is pressed against the inner peripheral wall of the second tapered cylindrical portion 22c, maintaining the extended state. When the large diameter cylindrical portion 22 is pressed against the small diameter cylindrical portion 21 from this extended state, the above-mentioned pressed state is released, and the large diameter cylindrical portion 22 can be slid to a contracted state where the end face of the large diameter cylindrical portion main body 22a is received by the stopper 23.

[0022] As shown in FIG. 8, the first cone fitting ring portion 3a has a core material 31a made of twisted cotton thread such as kite thread and a resin coating layer 31b made of polyethylene resin on the surface thereof. An elastic wire material 31 having a length slightly longer than the circumferential length of the first cone fitting ring portion 3a (slightly smaller in diameter than the through-hole 25) is inserted at one end thereof through one of the through-holes 25 from the outside of the small-diameter cylindrical portion 21 and at the other end thereof through the other through-hole 25 from the outside of the small-diameter cylindrical portion 21, with both ends overlapping each other by a length of about 1 cm within the small-diameter cylindrical portion 21. The resin coating layers 31b are heat-fused together at the overlapping portion 31c, and then a heat-shrinkable tube 32 longer than the length of the overlapping portion 31c is placed over the overlapping portion 31c. The heat-shrinkable tube 32 is then heat-shrunk, so that both ends of the elastic wire material 31 are connected and held in a ring shape by the elastic force of the polyethylene resin that makes up the resin coating layer 31b.

[0023] The second cone fitting ring portion 3b is formed by inserting one end of an elastic wire material 31, which is slightly longer than the circumferential length of the second cone fitting ring portion 3b to be obtained, into one of the through-holes 25 from the outside of the large-diameter cylindrical portion 22 and the other end of the elastic wire material 31 into the other through-hole 25 from the outside of the large-diameter cylindrical portion 22, so that both ends are overlapped to a length of about 1 cm within the large-diameter cylindrical portion 22, and the resin coating layers 31c are heat-fused to each other at the overlapping portion 31c. After that, the overlapping portion 31c is covered with a heat-shrinkable tube 32 which is longer than the length of the overlapping portion 31b, and the heat-shrinkable tube 32 is heat-shrunk so that both ends of the elastic wire material 31 are connected and held in a ring shape by the elastic force of the polyethylene resin that makes up the resin coating layer 31b. Furthermore, since the diameter of the wire material of the first cone fitting ring portion 3a and the second cone fitting ring portion 3b is slightly smaller than the diameter of the through hole 25, they can be rotated from a usage position in which they are fitted and locked to the cone as shown in Figures 1 to 4 to a folded position in which they are fitted along the outer wall surface of the small diameter cylindrical portion 21 or the large diameter cylindrical portion 22 as shown in Figure 5. The thickness of the core material 31a and the thickness of the resin coating layer 31b are not particularly limited as long as the elastic wire material 31 can maintain its ring shape by its elastic force and the durability of the first cone fitting ring portion 3a and the second cone fitting ring portion 3b is sufficiently ensured.

[0024] The cone bar 1 is configured as described above and therefore has the following effects. (1) As shown in FIG. 5, one end of the large-diameter cylindrical portion 22 slides relative to the small-diameter cylindrical portion 21 until it abuts against the stopper 23, which allows the length of the cone bar 1 to be shortened and the first cone fitting ring portion 3a and the second cone fitting ring portion 3b to be folded, making it compact for storage and transportation. (2) The first cone fitting ring portion 3a and the second cone fitting ring portion 3b are heat-fused together at the resin-coated portions 31b of the overlapping portions 31c at both ends of the elastic wire material 31, and the overlapping portions 31b are covered with a heat-shrinkable tube 32, which is then heat-shrunk to connect the both ends. As a result, the elastic force of the elastic wire material 31 holds the ring in place, making it easy to engage with the cone. (3) Since the first cone fitting ring portion 3a and the second cone fitting ring portion 3b are formed of the elastic wire material 31, they can be formed simply by cutting a long elastic wire material to the desired length and connecting both ends. The diameter of the first cone fitting ring portion 3a and the second cone fitting ring portion 3b can be easily changed simply by changing the cutting length. That is, since there is no need to change the mold every time the diameter is changed, the manufacturing cost can be reduced.

[0025] The present invention is not limited to the above-described embodiments. For example, although the bar body is cylindrical in the above-described embodiments, it may be a 2n-sided (n = 2 or an integer greater than 1) polygonal tube or an elliptical tube. In the above embodiment, the through hole is a perfect circle, but the cone fitting ring portion may be elliptical or polygonal as long as it can be configured to be in either the use position or the folded position. Furthermore, the inner peripheral wall of the circular through hole may be provided with a recess into which a portion of the filament material fits to prevent the cone fitting ring portion from rotating when the cone fitting ring portion is in the use position or the folded position.

[0026] In the above embodiment, the end of the bar body is open, but a cap may be provided to close the opening. In the above embodiment, the bar body is extendable and contractible to adjust the length, but if the bar body is short, the extendable structure is not necessary.

[0027] In the above embodiment, one end of the bar body is a small diameter cylindrical portion and the other end is a large diameter cylindrical portion, but it is also possible to have the large diameter cylindrical portion in the center and small diameter cylindrical portions on both sides of the large diameter cylindrical portion. In the above embodiment, the entire length of the bar body is formed as a cylindrical body, but only the end portion where the cone fitting ring portion is attached may be cylindrical.

[0028] In the above embodiment, the elastic filament material is configured with a resin coating layer on the surface of the core material, but it may be configured only with a resin wire material such as a resin elastomer. In the above embodiment, the extended state can be maintained by providing the first and second locking cylindrical portions. However, instead of providing the first and second locking cylindrical portions, a screw socket 26 can be integrally provided at the end of the large diameter cylindrical portion main body on the side of the small diameter cylindrical portion, and the large diameter cylindrical portion can be fixed to the small diameter cylindrical portion by tightening the screw socket, and the large diameter cylindrical portion can slide relative to the small diameter cylindrical portion by releasing the screw socket, allowing the extension length of the bar main body to be adjusted continuously. [Explanation of symbols]

[0029] 1 Cone Bar 2 Bar body 21 Small diameter cylinder part 21a Small diameter cylindrical body 21b First locking cylinder part 21c First tapered cylindrical portion 21d First cylindrical section 22 Large diameter cylindrical section 22a Large diameter cylindrical body 22b Second locking cylinder part 22c Second tapered cylindrical section 22d Second cylindrical section 23 Stopper 24 Reflective tape 25 through holes 3a First cone fitting ring 3b Second cone fitting ring 31 Elastic wire material 31a Core material 31b Resin coating layer 31c Overlapped part 32 Heat shrink tubing

Claims

[Claim 1] A cone bar having a bar body and a substantially ring-shaped cone fitting ring portion provided at both ends of the bar body, The bar body has at least a cylindrical portion at each end, and the cylindrical portion has a pair of through holes at symmetrical positions on the end wall surface of the cylindrical portion with respect to the central axis of the cylindrical portion. The cone fitting ring portion is formed by inserting a single elastic wire material having a diameter smaller than the through holes into the pair of through holes, and a ring portion is formed on the outside of the bar body by the elastic force of the elastic wire material, and is held by the bar body.

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