Scaffolding clamps

Abstract

The present invention provides a scaffolding clamp that can clamp a member having screw threads while maintaining a certain level of strength and reducing wobbling. [Solution] A movable member 50 and a bolt member 44 are rotatably connected to one end and the other end of the support member 30 by a pair of parallel shafts 36 and 40. With the bolt member 44 inserted into the notch, the clamped member 80, sandwiched between the movable member 50 and the support member 30, is clamped by rotating the nut 45 screwed onto the bolt member 44. The inner surface of the movable member 50 has an engaging body 60 equipped with engaging teeth 66 that engage with the screw threads 84 of the clamped member 80, which are aligned in the axial direction of the clamped member 80.

Description

Technical Field

[0001] The present invention relates to a scaffold clamp.

Background Art

[0002] Conventionally, at construction sites and the like, a single-pipe scaffold formed by combining single pipes arranged in the vertical and horizontal directions has been used. A general single-pipe scaffold uses a single-pipe clamp (orthogonal clamp or swivel clamp) having two clamp portions. That is, in a single-pipe scaffold, a single pipe (support column) arranged in the vertical direction is clamped by one clamp portion of the single-pipe clamp, and a single pipe arranged in the horizontal direction is clamped by the other clamp portion (see Patent Document 1).

[0003] Also, in a single-pipe scaffold, the above single-pipe clamp may be used to clamp the threaded portion of the jack base arranged vertically with one clamp portion and clamp the single pipe arranged horizontally with the other clamp portion.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in the clamp portion that clamps the threaded portion of the jack base, there is a problem that the clamping is insufficient, the strength is not stable, and it is easy to wobble. The reason for this is that the clamping surface of the clamp portion against the threaded portion only touches the apex of the thread, so the clamping is insufficient.

[0006] An object of the present invention is to provide a scaffold clamp that has a certain strength and can reduce wobbling when clamping a clamped member having a thread. [Means for solving the problem]

[0007] To solve the above problems, the scaffolding clamp of the present invention has a clamp portion that clamps a member to be clamped between the second and first clamping members by a nut screwed onto the bolt member or by rotating the bolt member, with the bolt member inserted into the notch and the clamped member inserted into the notch, and at least one inner surface of the first and second clamping members that clamps the member to be clamped has an engaging body which has an engaging portion that engages with the threads of the member to be clamped which are aligned in the axial direction of the member to be clamped.

[0008] Furthermore, when the clamp portion is designated as the first clamp portion, the first clamp portion may have a second clamp portion, each having a member corresponding to the first clamping member, second clamping member, and bolt member of the first clamp portion, which may be fixed to or rotatably connected to the first clamping member of the first clamp portion.

[0009] Furthermore, it is preferable that the engaging portion of the engaging body is a plurality of engaging teeth formed at intervals of at least the same pitch as the screw threads of the clamped member. Furthermore, it is preferable that the inner surfaces of the first clamping member and the second clamping member each have an arc-shaped first curved surface and a second curved surface for clamping a single pipe, and that the inner surface of the engaging body has a third curved surface with a smaller radius of curvature than the first curved surface in a direction intersecting the direction in which the engaging teeth are aligned, and that the second curved surface is arranged to be able to come into contact with the clamped member having screw threads when clamping it. [Effects of the Invention]

[0010] According to the present invention, when a clamped member having screw threads is clamped, it is possible to achieve a certain level of strength while reducing wobbling. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view of a scaffolding clamp according to one embodiment. [Figure 2] This is a front view of one of the clamping parts of a scaffolding clamp. [Figure 3] This is a perspective view of a scaffolding clamp according to one embodiment. [Figure 4] This is a perspective view of the attachment from the inside. [Figure 5] This is a perspective view of the attachment from the outside. [Figure 6] This is a perspective view of the second clamping member from the inner side with the attachment not yet installed. [Figure 7] This is a perspective view of the second clamping member from the outside, with the attachment not yet installed. [Figure 8] This is a perspective view of the second clamping member from the outer side, viewed from a different direction than in Figure 7. [Figure 9] This is a perspective view of the first clamping portion from the inner side. [Figure 10] This is an explanatory diagram showing the state in which the screw thread and the engaging part are engaged. [Figure 11] This is a partial cross-sectional view showing the support member, movable member, and engaging body gripping the member to be clamped. [Figure 12] This is a perspective view of temporary scaffolding in use, showing the scaffolding clamps in place. [Figure 13] This is a magnified perspective view of a scaffolding clamp in use. [Figure 14] This is a magnified perspective view showing the usage of other scaffolding clamps. [Modes for carrying out the invention]

[0012] (Embodiment) Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 14. As shown in FIGS. 1 to 3, the scaffold clamp 10 has a first clamp part 20 and a second clamp part 120 provided with an engaging body 60.

[0013] <First clamp part 20> The first clamp part 20 includes a support member 30 and a movable member 50. The support member 30 corresponds to the first clamping member. The movable member 50 corresponds to the second clamping member.

[0014] (Support member 30) The support member 30 is formed by pressing a metal plate material and has a concave cross-section. When viewed from the side, the support member 30 is formed in an L shape and has a central part 31, a rising part 32 rising from the central part 31, and an extending part 33 extending linearly from the central part 31 as shown in FIG. 9.

[0015] The central part 31, the rising part 32 and the extending part 33 have a concave cross-section as described above, and thus have bottom plate parts 31a, 32a, 33a and a pair of side plate parts 31b, 32b, 33b standing on both sides of the bottom plate parts 31a, 32a, 33a, respectively (see FIG. 9).

[0016] As shown in FIG. 9, the bottom plate part 31a of the central part 31 and the bottom plate part 32a of the rising part 32 have substantially the same width. As shown in FIG. 9, the bottom plate part 33a of the extending part 33 is narrower than the width of the bottom plate part 31a.

[0017] As shown in FIG. 9, a circular connection hole 38 penetrates the bottom plate part 31a. As shown in FIGS. 1 and 2, the second clamp part 120 is connected to the first clamp part 20 via a connection member 39 fitted into the connection hole 38. Further, by the connection member 39, the second clamp part 120 is rotatable around the central axis passing through the center of the connection hole 38 with respect to the first clamp part 20. For example, FIGS. 1 to 2 show a state where the second clamp part 12 is arranged orthogonally to the first clamp part 20.

[0018] As shown in Figures 1 and 9, the end faces of the side plate portions 31b, 32b, and 33b on the side opposite the bottom plate portion have a first curved surface 34 in the shape of an arc with a common center of curvature. As shown in Figure 9, through holes 37 are provided at the ends of the side plate portions 32b of the support member 30 on the side opposite the side plate portion 31b.

[0019] As shown in Figure 1, shafts 36 are installed at both ends of the opposite side plate portion 31b, passing through through holes 37. A movable member 50 is rotatably supported on the shaft 36. The shaft 36 corresponds to the shaft portion.

[0020] (Movable member 50) As shown in Figures 1, 6, and 7, the movable member 50 is formed from a metal plate by press working to have a concave cross-section, with a top plate portion 51 and a pair of side plate portions 52 positioned on both sides of the top plate portion 51. That is, if the axial direction of the shaft 36 is the width direction, the side plate portions 52 are bent at approximately right angles at both ends in the width direction of the top plate portion 51. As shown in Figures 7 and 8, the tip of the top plate portion 51 is formed to become narrower towards the tip. As shown in Figures 6 and 7, through holes 52a are formed at the base ends of both side plate portions 52. The movable member 50 is connected to the support member 30 by the shaft 36 being rotatably inserted through both through holes 52a.

[0021] As shown in Figures 3, 6, 7, and 8, on the side of the support member 30 (the side that clamps the clamped member 80) of both side plate portions 52, there are protruding portions 53 that extend in directions away from each other in the axial direction of the shaft 36 (see Figure 3).

[0022] As shown in Figure 6, the side surface (i.e., inner surface) of the protruding portion 53 that clamps the member to be clamped 80 has a second curved surface 54 in the shape of an arc, which has the same center of curvature as the first curved surface 34 of the side plate portions 31b and 32b.

[0023] As shown in Figures 7 and 8, a recess 56 is formed in the center of the outer surface of the top plate portion 51 in the width direction (axis direction of the axis 36). A mounting hole 57 is drilled through the bottom surface of the recess 56 in the thickness direction.

[0024] The radii of curvature of the first curved surface 34 and the second curved surface 54 are set to be large enough to allow a cylindrical pipe (not shown) to be clamped between them. In other words, it is possible to clamp the pipe while it is in contact with the outer surface of the pipe. Note that "pipe" includes the pipe material described later.

[0025] As shown in Figures 2, 6 to 8, a notch 55 with an open end is formed at the tip of the top plate portion 51 along the longitudinal direction of the top plate portion 51 (a direction perpendicular to the axial direction). (Bolt member 44) As shown in Figures 1, 3, and 9, a shaft 40 is installed between a pair of side plate portions 33b of the support member 30. A bolt member 44 is connected between the side plate portions 33b by the shaft 40, with a boss portion 42 at its base end swingably passing through it. The shaft 40 corresponds to the shaft portion. The shaft 40 is arranged parallel to the shaft 36.

[0026] The bolt member 44 has a boss portion 42 and a bolt portion 43 integrally connected to the boss portion 42. When clamping the clamped member 80 between the support member 30 and the movable member 50, the free end of the bolt member 44 can be engaged with the notch 55 of the movable member 50 from its open end side, as shown in Figures 1, 2, and 3. By screwing the nut 45, which is screwed onto the bolt portion 43, into contact with the plate portions 52 on both sides, it is possible to hold the clamped member 80, which is sandwiched between the support member 30 and the movable member 50, in a clamped state.

[0027] (Engaging body 60) Next, the engaging body 60 attached to the movable member 50 will be described. As shown in Figures 4 and 5, the engaging body 60 has an arch-shaped steel body 61. The non-clamping side of the body 61 is a curved surface 61a whose radius of curvature is the same as that of the arc-shaped second curved surface 54 of the overhang 53.

[0028] In this specification, the clamping side refers to the side that clamps the member to be clamped, such as a single pipe, 80. The non-clamping side refers to the side that is 180 degrees opposite to the clamping side. A through-hole 62 is formed approximately in the center of the curved surface 61a, extending through in the thickness direction. The main body 61 is crimped to the movable member 50 by crimping pins 63 inserted through the mounting holes 57 and the through-hole 62 of the movable member 50 (see Figure 11).

[0029] Note that Figure 5, for the sake of explanation, only shows the state in which the crimping pin 63 is simply inserted through the through hole 62, and does not show the crimped state. As shown in Figures 8 and 11, the head of the crimping pin 63 is positioned within the recess 56 so as not to protrude from the outer surface of the top plate portion 51.

[0030] As described above, with the engaging body 60 crimped to the movable member 50, most of the curved surface 61a of the main body 61 is in contact with the second curved surface 54 of the protruding portion 53.

[0031] As shown in Figure 5, in the main body 61, side walls 64 protrude along each side edge in the width direction, on the clamping side and the non-clamping side, respectively. Hereinafter, the portion of the side wall 64 that protrudes on the clamping side (clamping side portion) will be denoted with the symbol "64a". The portion of the side wall 64 that protrudes on the non-clamping side (non-clamping side portion) will be denoted with the symbol "64b".

[0032] The non-clamping portion 64b is in contact with the end face of the protruding portion 53, as shown in Figure 8, with the engaging body 60 crimped to the movable member 50. Rotation around the axis of the crimping pin 63 is prevented while it is crimped in place by the crimping pin 63.

[0033] The end face of the clamping portion 64a is formed as a third curved surface 65. The radius of curvature of the third curved surface 65 is smaller than that of the first curved surface 34. The radius of curvature of the third curved surface 65 is preferably the same as, or close to, the radius of the threaded portion 82 of the clamped member 80, as shown in Figure 11.

[0034] As shown in Figure 4, on the inner surface of the clamping side of the engaging body 60, a plurality of engaging teeth 66 are arranged in the axial direction of the clamped member 80 (see Figure 11) as engaging parts. That is, the plurality of engaging teeth 66 are arranged to have the same pitch as the threads 84 of the screw portion 82 of the clamped member 80, and are designed to engage with the valleys 84a between the threads 84.

[0035] <Second clamp section 120> The second clamping section 120 will now be described. The second clamp portion 120 differs from the first clamp portion 20 only in that it does not have an engaging body 60; otherwise, its configuration is the same as that of the first clamp portion 20. Therefore, in the second clamp portion 120, parts or component configurations corresponding to the configuration described for the first clamp portion 20 are assigned a code obtained by adding "100" to the code assigned to each component described for the first clamp portion 20, thereby substituting the description of the configuration of the second clamp portion 120.

[0036] Furthermore, the second clamp portion 120 has a connecting hole (not shown) formed in the rising portion 132, similar to the connecting hole 38 of the first clamp portion 20. A connecting member 39 is rotatably attached to this connecting hole.

[0037] (Effect of the embodiment) Next, the operation of the scaffolding clamp 10 will be explained with reference to Figures 10 to 13. Figure 12 illustrates an example of using the scaffolding clamp 10 on temporary scaffolding. The temporary scaffolding 200 shown in Figure 12 is just one example, and the temporary scaffolding on which the scaffolding clamp 10 is applied is not limited to this example.

[0038] Let me explain the temporary scaffolding 200. The temporary scaffolding 200 shown in Figure 12 includes a ground contact section 210, support columns 220 that extend upward with their lower ends fitted into the ground contact section 210, cylindrical pipe materials 230 that connect multiple support columns 220, and cylindrical pipe materials 240, 250, etc. that connect the support columns 220 using scaffolding clamps 10. The outer diameters of the pipe materials 230, 240, and 250 are the same.

[0039] The support column 220 is made of a steel round pipe of a predetermined length. The support column 220 has fastening body receiving parts 222 arranged at predetermined intervals in the height direction. The fastening body receiving parts 222 protrude in four directions from the side of the support column 220.

[0040] The pipe material 230 is connected to the support column 220 by the fastening body receiving portion 222 accommodating and fastening fastening bodies (not shown) provided at both ends. The ground contact section 210 is composed of a steel member consisting of a plate-like body 212 that rests on the ground and a threaded rod 214 (see Figure 14) extending upward from the plate-like body 212. The vertical position of the support column 220 can be adjusted by rotating the ground contact section 210 using an adjustment lever 216 screwed onto the threaded rod 214. The threaded rod 214 has a smaller diameter than the cylindrical pipe materials 230, 240, and 250.

[0041] In this example, the threaded rod 214 corresponds to the clamped member 80. The threaded rod 214 has a threaded portion 82, threads 84, and a valley portion 84a. As shown in Figures 12 and 13, the temporary scaffolding 200 has a main beam support section 260 that fits onto the upper end of each support column 220 and extends upward. The main beam support section 260 is made of a steel member consisting of a concave support fitting 262 that receives the main beam 270 and a threaded rod 264 that extends downward from the support fitting 262 and fits onto the upper end of the support column 220. The temporary scaffolding 200 supports the main beam 270 between the main beam support sections 260. The configuration of the threaded rod 264 is the same as that of the threaded rod 214, and it has a smaller diameter than the cylindrical pipe materials 230, 240, and 250.

[0042] The main beam support section 260 can be rotated by operating an adjustment lever 266 screwed onto a threaded rod 264, thereby allowing adjustment of the vertical position of the main beam 270 supported by the support bracket 262. In this example, the threaded rod 264 corresponds to the member to be clamped 80. Therefore, the threaded rod 264 has a threaded portion 82, threads 84, and valleys 84a.

[0043] <Regarding the connection between the ground contact point 210 and the pipe material 250> As shown in Figure 12, pipe material 250 is connected between the threaded rods 214 of the ground contact section 210 using scaffolding clamps 10. Pipe material 250 is formed to be longer than pipe material 230. In this example, it is more than twice as long as pipe material 230.

[0044] Figure 14 is a magnified view of the connection between the threaded rod 214 of the grounding portion 210 and the pipe material 250, as shown in Figure 12. As shown in Figure 14, the threaded rod 214 of the grounding portion 210 is clamped between the support member 30 and the movable member 50 of the first clamp portion 20. The pipe material 250 is clamped between the support member 130 and the movable member 150 of the second clamp portion 120.

[0045] The clamping of the first clamping portion 20 to the threaded rod 214 is performed by moving the bolt member 44 away from the notch 55 and releasing the movable member 50, with the threaded rod 214 positioned between the support member 30 and the movable member 50. Then, the movable member 50 is rotated in the clamping direction to clamp the threaded rod 214 between the support member 30 and the movable member 50. At this time, as shown in Figures 10 and 11, the engaging teeth 66 engage with the valleys 84a between the threads 84 of the threaded rod 214.

[0046] Next, the free end of the bolt member 44 is engaged with the notch 55 from its open end side. Then, as shown in Figure 11, the nut 45 is screwed in until it contacts the plate portions 52 on both sides. As a result, as shown in Figure 11, the threaded portion 82 of the clamped member 80 is clamped between the third curved surface 65 and the first curved surface 34 of the engaging body 60.

[0047] In this example, the radius of curvature of the third curved surface 65 is slightly smaller than the radius of curvature of the threaded portion 82. Therefore, as shown in Figure 11, the third curved surface 65 is in contact with the threaded portion 82 at the points P1 and P2, which are the furthest apart from it.

[0048] As a result, the engaging teeth 66 of the engaging body 60 engage with the valley portion 84a of the threaded portion 82 on the threaded rod 214, thereby preventing misalignment in the height direction. Furthermore, the radius of curvature of the first curved surface 34 is smaller than that of the third curved surface 65, and the contact area or contact portion with the threaded portion 82, which has a smaller diameter than the cylindrical pipe material 230, 240, and 250, is increased. As a result, the wobbling of the first clamp portion 20 relative to the threaded rod 214 can be reduced.

[0049] The threaded rod 214 of the ground contact portion 210 and the pipe material 250 are arranged perpendicularly to each other, as shown in Figure 14. Therefore, between the first clamp portion 20 and the second clamp portion 120, as shown in Figures 1 and 2, the clamp portions are arranged perpendicularly to each other by the connecting member 39 to match the arrangement of the threaded rod 214 and the pipe material 250.

[0050] In Figure 14, the scaffolding clamp 10 is attached to the pipe material 250 by the support member 130 and the movable member 150. The method for clamping the pipe material 250 is the same as described in the explanation of the clamping method for the support member 30 and the screw portion 82 of the movable member 50, except that the engaging body 60 is omitted and the second curved surface 154 and the first curved surface 134 of the movable member 150 clamp the pipe material 250. For this reason, the explanation of the method for clamping the pipe material 250 is omitted.

[0051] <Connection between threaded rod 264 and pipe material 240 in main support section 260> As shown in Figure 12, pipe material 240 is connected between the threaded rods 264 of the main beam support section 260 using scaffolding clamps 10 and 90. Pipe material 240 is formed to be longer than pipe material 230. In this example, it is more than twice as long as pipe material 230.

[0052] Figure 13 is a magnified view of the connection between the threaded rod 264 of the main beam support section 260 and the pipe material 240, as shown in Figure 12. As shown in Figure 13, the threaded rod 264 of the main beam support section 260 is clamped between the support member 30 and the movable member 50 of the first clamp section 20. The pipe material 240 is clamped between the support member 130 and the movable member 150 of the second clamp section 120.

[0053] The method of clamping the first clamp portion 20 to the threaded rod 264 of the main beam support portion 260 is the same as the method of clamping the threaded rod 214 of the grounding portion 210, so the explanation is omitted. Therefore, the radius of curvature of the first curved surface 34 is smaller than that of the third curved surface 65, and the contact area or contact portion with the threaded portion 82, which has a smaller diameter than the cylindrical pipe material 240, is increased. As a result, wobbling relative to the threaded rod 264 can be reduced.

[0054] The pipe material 240 is positioned diagonally such that the scaffolding clamp 10 side is higher than the scaffolding clamp 90 side. For this reason, the rotational position of the first clamp section 20 and the second clamp section 120 is adjusted by the connecting member 39 to match the arrangement of the threaded rod 264 and the pipe material 240. In Figure 13, the scaffolding clamp 10 is attached to the pipe material 240 by the support member 130 and the movable member 150.

[0055] In the scaffolding clamp 90, a pair of second clamp portions 120 are connected to each other via a connecting member having the same configuration as the connecting member 39. Therefore, the support column 220 and the pipe material 240 are connected by being clamped between the two second clamp portions 120, respectively.

[0056] <Connection of threaded rod 264 and pipe material 250 in main support section 260> As shown in Figure 12, pipe material 250 is connected between the threaded rods 264 of the main beam support section 260 using scaffolding clamps 10. Pipe material 250 is formed to be longer than pipe material 230. In this example, it is more than twice as long as pipe material 230.

[0057] Figure 13 shows a magnified view of the connection between the threaded rod 264 of the main beam support section 260, as illustrated in Figure 12, and the pipe material 250. As shown in Figure 13, the threaded rod 264 of the main support section 260 is clamped between the support member 30 and the movable member 50 of the first clamp section 20. The pipe material 250 is positioned horizontally and clamped between the support member 130 and the movable member 150 of the second clamp section 120.

[0058] The method of clamping the first clamp portion 20 to the threaded rod 264 of the main beam support portion 260 is the same as the method of clamping the threaded rod 214 of the grounding portion 210, so the explanation is omitted. Therefore, the radius of curvature of the first curved surface 34 is smaller than that of the third curved surface 65, and the contact area or contact portion with the threaded portion 82, which has a smaller diameter than the cylindrical pipe material 250, is increased. As a result, the wobbling of the first clamp portion 20 relative to the threaded rod 264 can be reduced.

[0059] The pipe material 250 is positioned horizontally. Therefore, the first clamp section 20 and the second clamp section 120 are adjusted by the connecting member 39 so that their rotational positions are orthogonal to the arrangement of the threaded rod 264 and the pipe material 250. In Figure 13, the scaffolding clamp 10 is attached to the pipe material 250 by the support member 130 and the movable member 150.

[0060] The scaffolding clamp 10 of this embodiment has the following features. (1) A movable member 50 (second clamping member) and a bolt member 44 are rotatably connected to one end and the other end of the support member 30 (first clamping member) by a pair of parallel shafts 36 and 40 (shaft portions). The movable member 50 is provided with a notch 55 that allows the insertion of the free end portion of the bolt member 44 when the movable member 50 is rotated in the direction of clamping toward the other end of the support member 30. With the bolt member 44 inserted into the notch 55, the clamped member 80 is clamped between the movable member 50 and the support member 30 by rotating the nut 45 screwed onto the bolt member 44. The inner surface of the movable member 50 has an engaging body 60 equipped with engaging teeth 66 (engaging portion) that engage between the screw threads 84 that are arranged in the axial direction of the clamped member 80 and are provided with the clamped member 80.

[0061] Therefore, the engaging teeth 66 of the engaging body 60 engage with the valleys 84a of the threaded portion 82 on the threaded rods 214 and 264, thereby suppressing displacement in the height direction. As a result, when clamping a member having threads, wobbling can be reduced.

[0062] (2) The second clamp portion 120 is rotatably connected to the support member 30 (first clamping member) of the first clamp portion 20. In this case, the second clamp portion 120 has members corresponding to the support member 30 (first clamping member), movable member 50 (second clamping member), and bolt member 44 of the first clamp portion 20.

[0063] As a result, the scaffolding clamp 10 can clamp pipe materials such as pipe materials 240 and 250 with the second clamping portion 120, and clamp the member to be clamped 80 with the first clamping portion 20. In this case, when clamping a member to be clamped that has screw threads, it can maintain a certain strength and reduce wobbling.

[0064] (3) Multiple engaging teeth 66 (engaging portion) of the engaging body 60 are formed at the same pitch interval as the screw threads 84 of the clamped member 80. As a result, the multiple engaging teeth 66 engage with the multiple valleys 84a of the screw threads 84, thereby providing a certain level of strength and reducing wobbling when clamping a member having screw threads.

[0065] (4) The inner surfaces of the support member 30 (first clamping member) and the movable member 50 (second clamping member) have arc-shaped first curved surface 34 and second curved surface 54, respectively, for clamping a single pipe. On the inner surface of the engaging body 60, in a direction intersecting the direction in which the engaging teeth 66 are aligned, there is a third curved surface 65 with a smaller radius of curvature than the first curved surface 34. The second curved surface 54 is positioned so as to be able to contact the clamped member 80 having screw threads 84 when clamping it.

[0066] Therefore, the radius of curvature of the first curved surface 34 is smaller than that of the third curved surface 65, and the contact area or contact portion with the threaded portion 82, which has a smaller diameter than the cylindrical pipe material 240, is increased. As a result, it can have a certain strength and reduce wobbling with respect to the threaded rods 214 and 264.

[0067] This embodiment can be implemented with the following modifications. This embodiment and the following embodiments can be combined and implemented to the extent that they do not contradict each other technically.

[0068] In the above embodiment, the engaging body 60 is provided on the inner surface of the movable member 50, but the engaging body 60 may also be provided on the inner surface of the support member 30. Furthermore, the engaging members 60 may be provided on the inner surfaces of the support member 30 and the movable member 50, respectively.

[0069] In the above embodiment, the engaging body 60 is crimped to the inner surface of the movable member 50 with a crimping pin 63, but the fixing to the inner surface of the support member 30 or the movable member 50 is not limited to crimping. Other fixing methods include, for example, fixing by welding or fixing by bolts. Alternatively, it may be formed integrally with the inner surface of the support member 30 or the movable member 50 by casting or machining.

[0070] In the above embodiment, the bolt member 44 has a boss portion 42 and a bolt portion 43 integrally connected to the boss portion 42. Alternatively, the bolt portion 43 may be screwed into the boss portion 42 so as to be able to move back and forth, and the nut 45 may be omitted, with the bolt portion 43 having a head with a larger diameter than a screw.

[0071] In the above embodiment, the first clamp portion 20 and the second clamp portion 120 are rotatably connected by a connecting member 39. Alternatively, the first clamp portion 20 and the second clamp portion 120 may be fixed so as not to rotate.

[0072] In the above embodiment, the engaging teeth 66 are provided at the same pitch interval as the screw threads 84 of the clamped member 80, but the pitch is not limited to the same interval. For example, one engaging tooth 66 may be provided, or multiple engaging teeth 66 may be provided to engage with the valleys 84a of the screw threads 84a at predetermined intervals, such as every other valley or every two valleys. [Explanation of Symbols]

[0073] 10... Scaffolding clamps 20…First clamp section 30…Support member 31...Central part 31a...Bottom plate part 31b...Side plate part 32…Rising section 32a...Bottom plate part 32b...Side plate part 33...Extending part 33a…Bottom plate part 33b…Side plate part 34…First curved surface 36...Shaft (shaft part) 37…Through hole 38...Connection hole 39…Connecting member 40...Shaft (shaft part) 42... Boss section 43... Bolt section 44… Bolt member 45... Nut 50…Movable parts 51...Top panel 52...Side plate part 52a...Through hole 53...Protruding section 54...Second curved surface 55… trigger 60…Engaging element 61...Main unit 61a...Curved surface 62…Through hole 63... Crimp pin 64…Side wall 64a...Pinching side part 64b…Anti-pinching side part 65...Third curved surface 66…Engaging teeth 68...Engaging teeth (engaging part) 80…Pinched member 82...Screw part 84... Screw thread 84a…Tanibe 90... Scaffolding clamps 120...Second clamp section 130...Support member 132... Upright section 133...Extension part 134...First curved surface 136...axis 140...axis 142... Boss section 143... Bolt section 144... Bolt member 145... Nut 150…Movable parts 153...Protruding section 154...Second curved surface 155... notch 200... Temporary scaffolding 210...Grounding part 212... Plate-like body 214...Threaded rod (member to be clamped) 216... Adjustment lever 220…post 222... Receiving part of the fastening body 230... Pipe material 240... Pipe material 250... Pipe material 260...Main support section 262... Mounting bracket 264...Threaded rod (member to be clamped) 270...Obiki

Claims

1. A scaffolding clamp comprising a clamp portion which clamps a member to be clamped between the second and first clamping members by a pair of parallel shaft portions at one and the other end of the first clamping member, respectively, the second clamping member having a notch that allows insertion of the free end portion of the bolt member when the second clamping member rotates toward the other end of the first clamping member, and a clamp portion which clamps a member to be clamped between the second clamping member and the first clamping member by a nut screwed onto the bolt member or by rotating the bolt member, with the bolt member inserted into the notch, A scaffolding clamp having an engaging body on at least one inner surface of the first clamping member and the second clamping member that clamps the member to be clamped, the engaging body having an engaging portion that engages between the screw threads aligned in the axial direction of the member to be clamped.

2. When the clamp portion is designated as the first clamp portion, The scaffolding clamp according to claim 1, wherein the first clamp portion has a second clamp portion having members corresponding to the first clamping member, the second clamping member, and the bolt member of the first clamp portion, and the second clamp portion is fixed to or rotatably connected to the first clamping member of the first clamp portion.

3. The scaffolding clamp according to claim 1 or claim 2, wherein the engaging portion of the engaging body has a plurality of engaging teeth formed at intervals of at least the same pitch as the screw threads of the clamped member.

4. The inner surfaces of the first clamping member and the second clamping member each have an arc-shaped first curved surface and a second curved surface for clamping a single pipe, The scaffolding clamp according to claim 3, wherein the inner surface of the engaging body has a third curved surface with a smaller radius of curvature than the first curved surface in a direction intersecting the direction in which the engaging teeth are aligned, and the third curved surface is arranged to be in contact with the clamped member having the screw threads when clamping it.

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