Jointed fishing rod, jointed fishing rod fixation auxiliary member, and set screw member

Abstract

To provide a jointed fishing rod that can prevent fall-off of a columnar member.SOLUTION: A jointed fishing rod has a connection body 10 for a jointed fishing rod in which a hollow first columnar member 21 and a hollow second columnar member 22 accommodating at least part of the first columnar member 21 are combined. The jointed fishing rod has: lid parts 212, 222 attached to the first columnar member 21 and the second columnar member 22 and including openings; a string-like member 3 arranged inside the first columnar member 21 and the second columnar member 22; a first stationary member attached to the lid part 212 of the first columnar member 21 and fixed to the string-like member 3; and a second stationary member 42 attached to the lid part 222 of the second columnar member 22 and fixed to the string-like member 3. The length of the string-like member 3 between the first stationary member and the second stationary member 42 is shorter than the length of the second columnar member 22.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a jointed fishing rod, and also to an auxiliary member for fixing a jointed fishing rod used in the jointed fishing rod, and a set screw member used as a part thereof. [Background technology]

[0002] Long rods that are extended for high-altitude work such as photography and underwater work are known (Non-Patent Document 1). These long rods are widely used as photography equipment that transmits images and photos from a camera installed at the tip to a monitor such as a smartphone in order to photograph high places. These long rods can be extended to lengths that cannot be achieved with a typical tripod, such as 4m to 15m at their longest. This length can be used to safely perform photography from high places such as aerial photography, inspection, surveying, underwater photography, and the like. On the other hand, when not in use as a long rod, the tube can be retracted to a length of about several tens of centimeters to just under 2m, making it easy to store and carry.

[0003] As for such long rods, for example, a camera that can be adjusted to any height while taking pictures, a pole-shaped work aid that is used when working at height, such as a construction worker using various tools such as scissors to cut branches at high places, etc. For example, Patent Document 1 discloses an overhead photography device for taking pictures from high places, which is used in archaeological excavation surveys, construction sites, design studios, etc.

[0004] Methods for adjusting the height include a telescopic rod-like auxiliary tool that has multiple cylindrical bodies of different diameters built in on the same axis and that advances the tubes one after the other when in use, or a joint rod-like auxiliary tool that has threads or fittings on both ends of cylindrical bodies of the same diameter and connects them by screwing the threads together or fitting them together with a fitting structure.

[0005] Patent Document 2 also discloses a tubular body for connecting rods, which includes a first hollow tubular body, a second hollow tubular body having a wider diameter than the first tubular body and containing a part of the first tubular body, a bonding portion provided between the outer periphery side of the first tubular body and the inner periphery side of the second tubular body with a part of the first tubular body contained within the hollow portion of the second tubular body, an upper end joining portion on the upper end side of the first tubular body and a lower end joining portion on the lower end side, the upper end side of the first tubular body that is not contained within the second tubular body and protrudes forms an insertion portion, and the hollow portion of the lower end side of the second tubular body that does not contain the first tubular body and into which the insertion portion can be fitted forms a receiving portion. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2012-150414 A [Patent Document 2] JP 2018-81148 A [Non-patent literature]

[0007] [Non-Patent Document 1] Bi(registered trademark) Rod Store (URL:https: / / birodstore.com / ) Summary of the Invention [Problem to be solved by the invention]

[0008] In Patent Document 1 and general tripods, when the legs are extended to be extended, a part of the leg that moves within the leg is provided with a large diameter part, and the inside and outside of the leg are caught to prevent the leg from falling off. However, in the case of such a shape, the leg for adjusting the length needs to be thin so that it can move freely while allowing the large diameter part to move within the tube, and the difference in thickness between the outside leg and the inside leg is large. For this reason, it is difficult to increase the number of steps of the leg, and it is not possible to shorten the length when stored while making it long when extended.

[0009] In order to solve such problems, Patent Document 2 and Non-Patent Document 1 use cylindrical members with approximately equal outer diameters at both ends, and between adjacent cylindrical members, an inner cylindrical member with an outer diameter approximately equal to the inner diameter of the outer cylindrical member is used. This prevents the difference in diameters of the cylindrical members from changing excessively even when multiple stages are used, making it easier to maintain sufficient strength even when multiple stages of tubes are connected together.

[0010] However, if the inner diameter of the outer tube and the outer diameter of the inner tube are approximately equal, the outer tube may be pulled out by mistake beyond its length, and the outer tube and the inner tube may be unintentionally separated. This situation may occur, for example, when the inner tube is pulled out too far because the mark for stopping the feeding is overlooked, when the inner tube falls out due to its weight when working without fastening the clamp, or when the clamp becomes loose and falls off during use.

[0011] Under such circumstances, an object of the present invention is to provide a joint rod capable of preventing the pole members from falling off, and members therefor. [Means for solving the problem]

[0012] The present inventors have conducted extensive research to solve the above problems, and as a result have found that the following invention meets the above object, thereby completing the present invention.

[0013] <1> A joint rod having a joint rod connector that combines a hollow first pillar member and a hollow second pillar member that accommodates at least a portion of the first pillar member, a cover member having an opening attached to the first pillar member and the second pillar member; a string-like member disposed inside the first pillar member and the second pillar member; A first fixing member attached to the lid portion of the first pillar member and fixed to the string-like member; a second fixing member attached to the lid portion of the second pillar member and fixed to the string-like member; A joint rod, in which the length of the string-like member between the first fixing member and the second fixing member is shorter than the length of the second pillar member. <2> The opening of the lid portion has a female thread portion, and the first fixing member and the second fixing member have male thread portions that are received in the female thread portions, the first fixing member and the second fixing member each have a first fixing member for fixing the string-like member and a set screw member having an accommodating portion for accommodating the first fixing member; The set screw member has a first groove portion provided along a length direction and a second groove portion intersecting the length direction of the first groove portion, and the second groove portion serves as the accommodation portion that accommodates the first fixing member. <1> The extension rod described in. <3> A joint rod fixing auxiliary member having a string-like member, a first fixing member fixed to the string-like member, and a second fixing member fixed to the string-like member, and attached at a predetermined length of the string-like member between the first fixing member and the second fixing member. <4> A set screw member having a first groove provided along a length direction and a second groove intersecting the length direction of the first groove. Effect of the Invention

[0014] According to the present invention, it is possible to prevent the pillar members of the joint rod from falling off. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a schematic diagram of an example of a joint for a joint rod according to the present invention. [Diagram 2] FIG. 13 is a schematic diagram showing the relationship between conventional pillar members. [Diagram 3] 1 is a schematic diagram of an example of a set screw member according to the present invention; [Figure 4] 1 is a schematic diagram of an example of a joint rod fixing auxiliary member according to the present invention. [Diagram 5] 10A to 10C are schematic diagrams illustrating an example of an operation for attaching a fixing member to a lid portion of a pole member according to the present invention. [Figure 6] FIG. 1 is a schematic diagram of an example of a joint rod according to the present invention. [Figure 7] FIG. 1 is a schematic diagram of an example of a fixing method for a joint rod according to the present invention. [Figure 8] 1 is a schematic diagram of an example of a jointed fishing rod according to the present invention. [Figure 9] 10A to 10C are schematic diagrams illustrating an example of an operation for attaching a fixing member to a lid portion of a pole member according to the present invention. [Figure 10] FIG. 2 is a schematic diagram of an example of the attachment of an end of a rod handle member according to the present invention. [Figure 11] 1 is an image of a manufacturing example of a first fixing member and a second fixing member according to the present invention. [Figure 12] 11 is an image showing an example of an operation for attaching a fixing member to a lid portion of a pole member according to the present invention. [Figure 13] 1 is an image of a manufacturing example of a joint for a fishing rod according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The following is a detailed description of the embodiments of the present invention, but the following description of the constituent elements is one example (representative example) of the embodiment of the present invention, and the present invention is not limited to the following content as long as the gist of the present invention is not changed. Note that in this specification, when the expression "~" is used, it is used as an expression including the numerical values ​​before and after it.

[0017] [The joint rod of the present invention] The extension rod of the present invention is an extension rod having a connector for extension rods, which is a combination of a hollow first pillar member and a hollow second pillar member that accommodates at least a part of the first pillar member, a cover member having an opening attached to the first pillar member and the second pillar member; a string-like member disposed inside the first pillar member and the second pillar member; A first fixing member attached to the lid portion of the first pillar member and fixed to the string-like member; and a second fixing member attached to the cover portion of the second pillar member and fixed to the string-like member, wherein the length of the string-like member between the first fixing member and the second fixing member is shorter than the length of the second pillar member.

[0018] [Auxiliary member for fixing the joint rod of the present invention] The auxiliary member for fixing a joint rod of the present invention comprises a string-like member, a first fixing member fixed to the string-like member, and a second fixing member fixed to the string-like member, and is attached at a predetermined length of the string-like member between the first fixing member and the second fixing member.

[0019] [Set screw member of the present invention] The setscrew member of the present invention has a first groove provided along the length direction, and a second groove intersecting the length direction of the first groove.

[0020] In addition, in this application, the auxiliary member for fixing a joint rod of the present invention and the set screw member of the present invention can be used in the joint rod of the present invention, and in this application, the corresponding configurations can be mutually utilized.

[0021] Fig. 1 is a schematic diagram of an example of a joint rod connector according to the present invention. Fig. 1(a) is a schematic diagram showing a joint rod connector 10 in a state in which a pole member is housed. Fig. 1(b) is a diagram showing a state in which a first pole member 21 is sent out from a second pole member 22 and extended. Fig. 1(c) shows a state in which the first pole member 21 is pulled out from the second pole member 22 to explain the relationship in length between the first pole member 21, the second pole member 22, etc.

[0022] FIG. 2 is a schematic diagram showing the relationship between conventional pillar members. The first pillar member 21 and the second pillar member 22 are a combination of parts related to the joint rod connector 10, which is a part of the joint rod. The first pillar member 21 and the second pillar member 22 are fixed with a clamp 223 to prevent them from falling off. As a guide for this fixing position, a mark 211, which is colored or the like, is provided on the first pillar member 21 arranged on the inside, and the first pillar member 21 is fixed with the clamp 223 of the second pillar member 22 on the outside within a range where the mark 211 can be seen. The second pillar member 22 is provided with a mark 221 for when other pillar members are further provided. If the first pillar member 21 is not fixed with the mark 211 and is not fixed with the clamp 223 and is continued to be sent out as it is, it will come off from the second pillar member 22. The joint rod of the present invention is attached so that each pillar member of the joint rod connecting body 10 does not fall off by using a string-like member 3, a first fixing member 41, and a second fixing member 42 related to the joint rod fixing auxiliary member of the present invention.

[0023] [Connector for extension rod 10] The joint rod connector 10 is formed by combining a first pillar member 21 and a second pillar member 22 that houses at least a portion of the first pillar member 21.

[0024] [First pillar member 21, second pillar member 22] The first pillar member 21 and the second pillar member 22 are pillar members constituting the joint rod connector 10. The first pillar member 21 and the second pillar member 22 can be similar in basic cross-sectional shape, length, thickness, etc., except for the difference in the thickness of the outer circumference equivalent to the diameter in the case of a cylinder. The joint rod can be a combination of multiple pillar members. For this reason, in terms of the relationship between the pillar members provided in multiple stages, when another inner pillar member is provided inside the first pillar member 21, the inner pillar member can be regarded as the first pillar member, and when another outer pillar member is provided outside the second pillar member 22, the outer pillar member can be regarded as the second pillar member, so that the joint rod can have a repeating structure. For this reason, when explaining the configuration common to the first pillar member 21 and the second pillar member 22, they may be simply called pillar members.

[0025] The pillar member is hollow. Other adjacent thin pillar members are housed in this hollow portion. The pillar members may be cylindrical with a circular cross section, polygonal prisms with a polygonal cross section, or a cross section that combines straight lines and curves. It is particularly preferable to use cylindrical members, since it is easy to connect multiple pillar members to form a long structure.

[0026] Such a column member is preferably made of a material that is lightweight and resistant to bending loads. Furthermore, it is preferable that the column member has excellent shape stability in the usage environment. As such a material, it is preferable that the column member is made of at least one material selected from the group consisting of carbon fiber, glass fiber, and aluminum. These materials may also be combined, and for example, a different material may be combined, such as making the first column member on the inside of the column member out of glass fiber and the second column member on the outside of the column member out of carbon fiber.

[0027] It is preferable to use pillar members of approximately the same length. As a specific length, for example, each pillar member is about 30 cm to 200 cm, and preferably about 50 cm to 150 cm. With such a length, it is possible to avoid an excessively large number of connections to achieve a length of 3 m or more or 5 m or more (for example, about 12 m) when the pillar members for a joint rod of the present invention are connected to be used as a joint rod, and also to obtain a length that is easy to transport in general and has excellent handleability. In addition, the diameter of the outermost part can be, for example, about 10 to 100 mm, more specifically, about 20 to 50 mm.

[0028] [Lid parts 212, 222] The first pillar member 21 has a lid portion 212 with an opening. The second pillar member 22 has a lid portion 222 with an opening. The lid portions 212, 222 are attached to prevent the pillar member from coming off on the opposite side of the shape designed as the direction in which the pillar member is sent out and extended, and to increase the strength of the pillar member so that it is less likely to deform when it is fastened by a clamp 223 or the like. For this reason, the lid portion 212 of the first pillar member 21 is provided on the second pillar member 22 side in the length direction of the first pillar member 21. The lid portion 222 of the second pillar member 22 is provided on the opposite side of the first pillar member 21 in the length direction of the second pillar member 22.

[0029] The lids 212 and 222 also have openings. These openings also function as holes for passing through and arranging the string-like member 3 and the like inside the joint rod connector 10. Furthermore, these openings can also be used as attachment positions for the first fixing member 41 and the second fixing member 42 (see Figs. 4 and 5).

[0030] [String-like member 3] The string-like member 3 is disposed inside the first pillar member 21 and the second pillar member 22. When the first pillar member 21 is housed in the second pillar member 22, the string-like member 3 is in a state of being pushed between the lid portion 212 and the lid portion 222. On the other hand, when the first pillar member 21 is in a use state in which it is sent out from the second pillar member 22 and stretched, it is in a stretched state. For this reason, it is preferable that the string-like member 3 is easy to bend, difficult to tangle, and has high strength when pulled. As such a string-like member, a thread with high strength can be used. For example, various fishing lines can be used, and in particular, fishing lines made of polyethylene can be used.

[0031] [First fixing member 41, second fixing member 42] The first fixing member 41 is attached to the lid portion 212 of the first pillar member 21 and fixed to the string-like member 3. The second fixing member 42 is attached to the lid portion 222 of the second pillar member 22 and fixed to the string-like member 3.

[0032] The first fixing member 41 and the second fixing member 42 are both fixed to the string-like member 3. As described above, the first fixing member 41 is attached to the first pillar member 21, and the second fixing member 42 is attached to the second pillar member 22. The length of the string-like member 3 in an extended state from the position where the first fixing member 41 is fixed to the position where the second fixing member 42 is fixed (corresponding to the length L1 in FIG. 1(c)) is designed to be shorter than the length of the second pillar member 22 (corresponding to the length L22 in FIG. 1(c)). As a result, even if the first pillar member 21 is pulled out, since the string-like member 3 is fixed to the first pillar member 21 and the second pillar member 22 in a stretched state up to the length L1, it becomes difficult to pull out any further and stops. Therefore, even if the mark 211 of the first pillar member 21 being pulled out is overlooked and the first pillar member 21 and the second pillar member 22 are not fastened with the clamp 223, it is possible to prevent a situation in which the first pillar member 21 and the second pillar member 22 are unintentionally separated and dropped off.

[0033] The difference between the length of the second pillar member 22 (corresponding to the length L22 in FIG. 1(c)) and the length of the string-like member 3 in a stretched state from the position where the first fixing member 41 is fixed to the position where the second fixing member 42 is fixed (corresponding to the length L1 in FIG. 1(c)) can be appropriately set within a range where the first pillar member 21 can be appropriately pulled out and can be prevented from falling off. When explaining using the length L22 and the length L1, it is more preferable that "length L22-length L1" is about 2 cm to 10 cm, or about 3 cm to 8 cm. When determining the length (L22) based on the position where the first fixing member 41 is fixed and the position where the second fixing member 42 is fixed, each position can be measured based on the center of the first fixing member 41 in the length direction and the center of the second fixing member 42 in the length direction.

[0034] It is preferable that the first fixing member 41 and the second fixing member 42 are fixed to the first pillar member 21 and the second pillar member 22, respectively, in a detachable manner. By making them detachable, the first pillar member 21 and the second pillar member 22 can also be separated. In normal use, it is better to fix them in place to prevent unintentional detachment and ensure safe use. On the other hand, depending on the use state of the extension rod, it may be better to use it in seawater, for example, and perform maintenance such as cleaning and drying after use. If the structure is made easy to separate when performing such maintenance, it is also excellent in that each component can be easily cleaned and replaced as necessary.

[0035] The string-like member is fixed to the first fixing member and the second fixing member by attaching them to the pillar member to prevent the pillar member from falling off during use, and a combination that can be arranged inside the pillar member can be used. For example, a combination can be used in which the opening of the lid is threaded, the first fixing member and the second fixing member can be attached by fitting them to the threads, and the string-like member can be fixed by wrapping or entangling it around a part of the threads.

[0036] The first fixing member 41 and the second fixing member 42 can be a combination of the first fixing members 411, 421 for fixing the string-like member 3 and the set screw members 412, 422 having a housing portion for housing the first fixing members 411, 421. By using such a combination, the first fixing members 411, 421 are attached to the string-like member 3 in advance, so that the interval (L1) of the length of the first fixing member 41 and the second fixing member 42 is easy to adjust. In addition, since the set screw members 412, 422 are used when attaching to each pillar member, attachment to the lid portions 212, 222 is also easy. In addition, such a combination of the first fixing member and the set screw member is excellent in workability, strength, and productivity for a relatively small member that is continuously arranged through the hollow portion of the pillar member while being attached to the lid portion of the pillar member.

[0037] Fig. 3 is a schematic diagram of an example of a set screw member according to the present invention. Fig. 4 is a schematic diagram of an example of a joint rod fixing auxiliary member according to the present invention. In the embodiment shown in Figs. 1 and 4, a ring is used as the first fixing members 411, 421. This ring is attached to the string-like member 3 with a predetermined length that is shorter than the length of the pole member aligned with the attachment position to prevent it from falling off.

[0038] [Set screw members 412, 422] The set screw members 412, 422 have first grooves 4121, 4221 provided along the length direction. These first grooves 4121, 4221 are also aligned along the length direction of the joint rod, and the string-like member 3 can be passed through these grooves. The set screw members 412, 422 further have second grooves 4122, 4222 that intersect with the length direction of the first grooves 4121, 4221. In other words, the set screw members 412, 422 have grooves that cross the trunk portions of the set screw members 412, 422. These second grooves 4122, 4222 serve as accommodation portions for accommodating the first fixing members 411, 421.

[0039] FIG. 5 is a schematic diagram for explaining an example of an operation of attaching a fixing member to a lid of a pillar member according to the present invention. Here, an example of attaching a string-like member 3 and a first fixing member 41 to a first pillar member 21 will be explained. The opening of the lid 212 of the first pillar member 21 has a female thread. And the first fixing member 41 has a male thread that is received in the female thread. The first fixing member 41 is combined with a first fixing member 411 and a set screw member 412. This first fixing member 411 is attached to the string-like member 3 and is housed in the housing of the set screw member 412. As shown in FIG. 5(a), in this combined state, the set screw member 412 having a male thread is pushed into the lid 212. Then, when the set screw member 412 is sufficiently pushed in as shown in FIG. 5(b), the first fixing member 411 that was sandwiched in the housing is covered by the female thread of the lid 212. This allows the string-like member 3 to be fixed to the first pillar member 21 by the first fixing member 41. By performing the same operation on the second pillar member 22, the string-like member 3 can be fixed to the second pillar member 22 by the second fixing member 42.

[0040] [Extended rod] In this way, the joint rod of the present invention has a configuration of a joint rod connector 10 that combines at least a first pillar member 21 and a second pillar member 22, and combines a string-like member 3 and a first fixing member 41 and a second fixing member 42 to prevent the first pillar member 21 from being fed out beyond the length of the second pillar member 22. The joint rod of the present invention can be made to conform to the external shape and use of Non-Patent Document 1 ("Bi (registered trademark) Rod" by Lumica Co., Ltd.). The joint rod is generally made to have multiple pillar members. The configuration corresponding to the joint rod connector 10 may be provided on all or only some of the pillar members of the joint rod.

[0041] In Fig. 1 and other figures, the extension rod connector 10 is shown connecting two pole members, but the configuration using the extension rod connector 10 of the present invention is also suitable for connecting a larger number of extension rod connectors, and multiple extension rod connectors can be connected with a simple operation. The number of connections can be, for example, 3 or more, preferably 5 or more, and more preferably 8 or more. There is no particular upper limit to the number of connections, but for general use, the length of the pole members of each extension rod connector can be optimized according to the use, and it is possible to assume up to about 30 connections, for example.

[0042] Fig. 6 is a schematic diagram of an example of a joint rod according to the present invention. Here, an example of a joint rod using 10 stages of pole members will be described. In Fig. 6, a thick pole member is used for the handle on the right side, and pole members that become thinner in stages are used toward the left side.

[0043] Fig. 7 is a schematic diagram for explaining an example of a fixing method in a joint rod according to the present invention. In each pillar member of a joint rod as shown in Fig. 6, a ring that is a part of the fixing member is attached to the string-like member so that each pillar member does not fall off according to the length between adjacent pillar members, that is, at an interval shorter than the length of the thicker pillar member that becomes the second pillar member of the adjacent pillar members. As shown in the cross-sectional view in the lower part of Fig. 7, this ring is fitted and fixed in the threaded part of the lid part via a set screw member that can accommodate the ring, so that the string-like member is attached to the pillar member via the fixing member. Therefore, the entire joint rod has a structure that can prevent the pillar members from falling off.

[0044] 8 to 10 are schematic diagrams related to the extension rod shown in Figs. 7 and 8 for easier understanding. Fig. 8 is a schematic diagram for explaining an example of the extension rod according to the present invention. Fig. 9 is a schematic diagram for explaining an example of the operation of attaching a fixing member to the cover of the pole member according to the present invention. Fig. 10 is a schematic diagram for explaining an example of the attachment of the end of the pole member for hand of the extension rod according to the present invention. The tip of the extension rod can be used for work, etc., so that any object can be attached to it. For example, it can be used as a pan head or holder for attaching a camera, etc., for taking pictures at high places, underwater, or in remote places. This extension rod may be used by hand, or it can be fixed to a tripod or the like. In addition, a controller, a holder for attaching a smartphone, or a fixing belt may be provided on the pole member for hand.

[0045] Fig. 8 shows the state in which the pole member is stored and the pole member at the tip is extended. In the stored state, the extension rod according to the present invention can be made compact. Fig. 9 shows the process of attaching the line to the ring, fitting the ring into the threaded rod-shaped fixing member, and screwing it into the cover of the pole member. Fig. 10 shows the state in which it is fixed with a short threaded rod-shaped fixing member to fix it to the pole member at hand.

[0046] Fig. 11 is an image of a manufacturing example of the first fixing member and the second fixing member according to the present invention. Fig. 12 is an image showing an example of an operation for attaching fixing members to the cover of the pole member according to the present invention. Fig. 13 is an image of a manufacturing example of the joint rod connector according to the present invention.

[0047] In this way, after fixing rings as stoppers at predetermined positions on nylon or polyethylene threads with a diameter of about 1 to 3 mm and sandwiching the ring and the thread, a screw-structured jig is screwed into the lid of the bottom part of each rod, making it easy to bind the rods together and to remove them when disassembling. In other words, this relates to a method of preventing falling off in which stopper members such as rings or discs are fixed at multiple predetermined positions and these are sequentially attached to a threaded rod such as a so-called set screw with a cross notch or the like to bind the bottom parts of the rods together. [Industrial Applicability]

[0048] INDUSTRIAL APPLICABILITY The present invention can be used for a fishing rod that can be used for high-altitude photography, etc., and is industrially useful. [Explanation of symbols]

[0049] 10. Rod connector 21 First Pillar Member 22 Second Pillar Member 211, 221 Landmark 222 Lid 223 Clamp 3. String-like member 31 Mounting part 41 First fixing member 42 Second fixing member 411, 421 First fixing member 412, 422 Set screw member 4121, 4221 First groove 4122, 4222 Second groove

Claims

1. A joint rod having a joint rod connector that combines a hollow first pillar member and a hollow second pillar member that accommodates at least a portion of the first pillar member, a cover member having an opening attached to the first pillar member and the second pillar member; a string-like member disposed inside the first pillar member and the second pillar member; A first fixing member attached to the lid portion of the first pillar member and fixed to the string-like member; a second fixing member attached to the lid portion of the second pillar member and fixed to the string-like member; A joint rod, in which the length of the string-like member between the first fixing member and the second fixing member is shorter than the length of the second pillar member.

2. The opening of the lid portion has a female thread portion, and the first fixing member and the second fixing member have male thread portions that are received in the female thread portions, the first fixing member and the second fixing member each have a first fixing member for fixing the string-like member and a set screw member having an accommodating portion for accommodating the first fixing member; The joint rod according to claim 1, wherein the set screw member has a first groove portion provided along the length direction and a second groove portion intersecting the length direction of the first groove portion, and the second groove portion serves as the accommodation portion for accommodating the first fixing member.

3. A string-shaped member, a first fixing member fixed to the string-shaped member, and a second fixing member fixed to the string-shaped member, A joint rod fixing auxiliary member that is attached to a predetermined length of the string-like member between the first fixing member and the second fixing member.

4. A set screw member having a first groove provided along a length direction and a second groove intersecting the length direction of the first groove.

Images