Clamp

Abstract

Provided is a clamp in which a rod portion of a bolt is less likely to come out of a U-shaped cutout portion and in which a member to be clamped can be firmly fastened. The present invention is provided with a main body member (23) (first clamping member) and a cover member (24) (second clamping member) which are rotatably connected by a first pin member (26), and a bolt screwing member (38) which is rotatably connected to the main body member by a second pin member (37). A rod portion (42) of the bolt (41) is inserted into a U-shaped notch portion (51) of the end portion of the cover member, the rod portion is screwed into the bolt screwing-in member, and a head portion (43) of the bolt (41) abuts against the portion, opposite to the bolt screwing-in member side, of the cover member. The pipe member (22) (clamped member) is clamped by the main body member and the cover member by the rotation operation of the bolt at the head, and the position of the second pin member is eccentric toward the pipe member side with respect to the bolt axis (A) of the bolt. From the start to the end of the rotation operation of the bolt at the head, a gap (S1) is generated between the bolt screwing member and the pipe member.

Description

Technical Field

[0001] The present invention relates to a clamp for clamping and fixing a pipe member constituting a temporary structure such as a temporary scaffold or a supporting frame. Background Art

[0002] As a conventional clamp, there is a clamp described in Patent Document 1, for example. The clamp disclosed in Patent Document 1 is a free clamp that connects a pipe member used in a temporary scaffold with another pipe member in a state of crossing at an arbitrary angle. Fig.14 The conventional clamp will be described. Fig.14 The clamp 1 shown has a pair of clamping parts 3 and 4 for clamping a pipe member 2 as a clamped member. The clamping parts 3 and 4 are connected to each other by a connecting member 5 so as to be rotatable with respect to each other.

[0003] Each clamping portion 3, 4 includes a first clamping member 7 and a second clamping member 8, one end of which is rotatably connected to each other by a first pin member 6. A bolt screwing member 10 is rotatably connected to the other end of the first clamping member 7 by a second pin member 9. The bolt screwing member 10 has an internal thread member 11. A shank 12a of a bolt 12 is screwed into the internal thread member 11. In addition, a portion of the bolt screwing member 10 facing the pipe member 2 is formed in a shape that imitates the shape of the outer peripheral surface of the pipe member 2.

[0004] A U-shaped notch 13 is formed at the other end of the second clamping member 8. The U-shaped notch 13 is formed in a U shape with the first pin member 6 side closed and the side opposite to the first pin member 6 side open. The rod 12a of the bolt 12 is inserted into the U-shaped notch 13.

[0005] The bolt 12 is screwed into the bolt-threaded member 10 in a state where the head 12 b thereof abuts against a portion of the other end portion of the second clamping member 8 on the side opposite to the bolt-threaded member 10 side.

[0006] The second pin member 9 connecting the first clamping member 7 and the bolt-tightening member 10 is provided at a position eccentric to the pipe member 2 with respect to the bolt axis of the bolt 12 whose shank 12 a is screwed into the bolt-tightening member 10 .

[0007] In the conventional clamp 1 configured as above, the pipe member 2 as a clamped member is clamped by the first clamping member 7 , the second clamping member 8 , and the bolt-tightening member 10 by the rotation operation of the bolt 12 at the head 12 b.

[0008] Prior art literature

[0009] Patent Literature

[0010] Patent Document 1: Japanese Utility Model Application Laid-Open No. 59-17305 Summary of the invention

[0011] Problem that the invention aims to solve

[0012] In the clamp 1 shown in Patent Document 1, if the bolt-tightening member 10 abuts against the pipe member 2 while the head 12b is being rotated to tighten the bolt 12 into the bolt-tightening member 10, the position of the bolt 12 is determined relative to the second clamping member 8, and the tightening of the bolt 12 may be completed in a state where the rod 12a of the bolt 12 has not reached the bottom of the U-shaped notch 13 (the end on the first pin member side). In such a case, the rod 12a of the bolt 12 is located closer to the opening side than the bottom of the U-shaped notch 13, so the bolt 12 is more likely to come out of the U-shaped notch 13 than when the rod 12a is located at the bottom of the U-shaped notch 13.

[0013] Furthermore, if the bolt-tightening member 10 abuts against the pipe member 2 during the tightening of the bolt 12, the first clamping member 7 after the abutment cannot or almost cannot rotate around the first pin member 6 due to the friction between the bolt-tightening member 10 and the pipe member 2. Therefore, it is difficult to tighten the pipe member 2 with a large force using the first clamping member 7 and the second clamping member 8.

[0014] An object of the present invention is to provide a clamp in which a shank of a bolt is unlikely to come out of a U-shaped notch and which can firmly fasten a clamped member.

[0015] Solutions for solving problems

[0016] In order to achieve this object, the clamp of the present invention is constructed to include: a first clamping member and a second clamping member, one end of which is rotatably connected to each other by a first pin member; a bolt screwing member, which is rotatably connected to the other end of the first clamping member by a second pin member; and a bolt, the rod of which is inserted into a U-shaped notch formed at the other end of the second clamping member in a manner that the first pin member side is blocked and the side opposite to the first pin member side is open, the rod is screwed into the bolt screwing member, and the head of the bolt abuts At a position on the other end portion of the second clamping member on the side opposite to the bolt-threaded member side, the first clamping member and the second clamping member clamp the clamped member by utilizing the rotation operation of the bolt at the head portion, and the configuration position of the second pin member is eccentric toward the clamped member side relative to the bolt axis of the bolt whose rod portion is screwed into the bolt-threaded member, wherein a gap is generated between the bolt-threaded member and the clamped member from the beginning to the end of the rotation operation of the bolt at the head portion.

[0017] In the clamp of the present invention, the end of the rotation operation of the bolt at the head portion may be when the rotation operation of the bolt at the head portion becomes impossible.

[0018] In the clamp of the present invention, the rotation operation of the bolt at the head portion is performed by an electric tool, and the time when the rotation operation of the bolt at the head portion becomes impossible means when the rotation operation performed by the electric tool reaches a limit.

[0019] In the jig of the present invention, when the shaft portion of the bolt reaches an end portion of the U-shaped notch portion on the first pin member side, the rotation operation of the bolt at the head portion may be completed.

[0020] In the clamp of the present invention, a surface of the bolt-tightening member facing the clamped member may be inclined in a direction away from the clamped member as extending from the second pin member side toward the head side of the bolt.

[0021] In the present invention, in the clamp, an internal threaded hole into which the shank of the bolt is screwed may be directly provided on the bolt screwing member.

[0022] The present invention may be that in the clamp, the bolt screwing member is configured to include: an internal thread member provided with an internal thread hole for screwing the shank of the bolt; and a rotating member that fixes the internal thread member and is rotatable around the second pin member.

[0023] In the clamp of the present invention, a gap may be generated between the other end portion of the first clamping member and the clamped member from the start to the end of the rotation operation of the bolt at the head portion.

[0024] In the present invention, in the clamp, the second pin member may be disposed at a position offset toward the clamped member with respect to the internal threaded hole of the bolt-tightening member into which the bolt is screwed.

[0025] Effects of the Invention

[0026] In the present invention, the bolt is screwed into the bolt screwing member while the rod of the bolt is inserted into the U-shaped notch portion. The bolt screwing member is pulled by the bolt, and a torque centered on the second pin member acts on the bolt screwing member. In this way, the torque acts on the bolt screwing member, so that the bolt screwing member rotates toward the clamped member centered on the second pin member. A gap is formed between the bolt screwing member and the clamped member from the beginning to the end of the rotation operation of the bolt at the head, so the rotation action of the bolt screwing member continues until the tightening of the bolt is completed. At this time, the bolt also rotates (sways) integrally with the bolt screwing member. Therefore, the head of the bolt moves toward the end of the first pin side of the U-shaped notch portion as the bolt screwing member swings.

[0027] Therefore, the shank of the bolt approaches the first pin in the U-shaped notch, and is therefore less likely to come out of the U-shaped notch.

[0028] In addition, since the bolt screwing member does not abut against the clamped member when tightening the bolt, the swinging motion of the first clamping member rotating around the first pin member is not hindered by the bolt screwing member. Therefore, the torque around the first pin member continues to act on the first clamping member until the tightening of the bolt is completed, so the clamped member can be firmly fastened by the first clamping member and the second clamping member.

[0029] Therefore, according to the present invention, it is possible to provide a clamp in which the shank portion of the bolt is unlikely to come out of the U-shaped notch portion and which can firmly fasten a clamped member. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front view of a single clamp holding a pipe member.

[0031] Figure 2 It is a cross-sectional view of a single clamp holding a pipe member.

[0032] Figure 3 It is a stereogram of a single fixture.

[0033] Figure 4 This is a perspective view of the single clamp showing a state in which the bolts are removed and the cover member is opened.

[0034] Figure 5 yes Figure 1 VV line section view in.

[0035] Figure 6 yes Figure 1 VI-VI line section view.

[0036] Figure 7 This is a front view of a single clamp showing a portion of the cover member cut away.

[0037] Figure 8 This is a front view of a single clamp holding a pipe member with a small outer diameter.

[0038] Fig. 9 It is a cross-sectional view of a single clamp showing a modified example of a bolt-tightening member.

[0039] Fig.10 It is a perspective view showing another modified example of the bolt screwing member.

[0040] Fig.11 It is a front view of an orthogonal fixture holding a pipe member.

[0041] Fig.12 It is the front view of the free clamp holding the pipe member.

[0042] Fig.13 This is a front view of the wall connector in a state of being mounted on the wall.

[0043] Fig.14 This is a front view of a conventional fixture. DETAILED DESCRIPTION

[0044] Below, refer to Figures 1 to 10 An embodiment of the clamp of the present invention will be described in detail.

[0045] Figure 1 The clamp 21 shown is a so-called single clamp, and includes a main body member 23 as a first clamping member for clamping a pipe member 22 as a clamped member, and a cover member 24 as a second clamping member. The clamp 21 is used to fix a functional component 25 mounted on the main body member 23 to the pipe member 22. Although not shown in detail, the functional component 25 is, for example, a hook for mounting a wire, a bracket for mounting a component used in a temporary scaffold, and the like.

[0046] The main body member 23 and the cover member 24 are formed into predetermined shapes by stamping metal plates, and one end portion 23a, 24a of each other is rotatably connected by a first pin member 26. Figure 5 As shown, the main body member 23 includes a transverse wall 31 extending in the axial direction of the first pin member 26 and a pair of longitudinal walls 32, 32 formed by bending both ends of the transverse wall 31. The cover member 24 includes a transverse wall 33 extending in the axial direction of the first pin member 26 and a pair of longitudinal walls 34 formed by bending both ends of the transverse wall 33.

[0047] The first pin member 26 is rotatably inserted through the first through hole 35 formed in the pair of vertical walls 32 of the main body member 23 and the second through hole 36 formed in the pair of vertical walls 34 of the cover member 24. The main body member 23 and the cover member 24 are structured to hold the pipe member 22 in a state where the vertical walls 32, 34 are in contact with the outer peripheral surface of the pipe member 22.

[0048] like Figure 2 As shown in FIG. 2 , the other end 23b of the main body member 23 is formed by a pair of vertical walls 32. A bolt screwing member 38 is rotatably connected to the other end 23b by a second pin member 37. Figure 6 As shown, the second pin member 37 is rotatably inserted into a third through hole 39 formed in the other end portion 23 b (vertical wall 32 ) of the main body member 23 .

[0049] The bolt screwing member 38 is a member into which a bolt 41 is screwed, and the bolt 41 is used to clamp the pipe member 22 between the main body member 23 and the cover member 24 of the clamp 1. Figure 4 As shown, the bolt 41 is composed of a rod 42 formed with an external thread 41a and a head 43 provided at one end of the rod 42. The head 43 is formed by a tool engaging portion 43a formed in a hexagonal prism shape when viewed from the axial direction of the rod 42 and a disk-shaped washer portion 43b provided at the boundary between the head 43 and the rod 42.

[0050] like Figure 4 As shown in FIG. 1 , the bolt screwing member 38 of this embodiment is composed of a connecting portion 38a inserted between a pair of vertical walls 32 of the main body member 23 and an internal threaded portion 38b having an internal threaded hole 44 into which the rod portion 42 of the bolt 41 is screwed. The rod portion 42 of the bolt 41 is screwed into the internal threaded hole 44 from the cover member 24 side. The bolt screwing member 38 of this embodiment is manufactured by forging, casting or sintering metal. Therefore, the connecting portion 38a and the internal threaded portion 38b are integrally formed of the same metal material.

[0051] like Figure 2 and Figure 6 As shown, the fourth through hole 45 is formed in the connecting portion 38a, through which the second pin member 37 is rotatably inserted. The position of the fourth through hole 45, in other words, the configuration position of the second pin member 37 inserted in the fourth through hole 45 is offset from the internal thread hole 44 toward the pipe member 22 side.

[0052] like Figure 4 As shown in FIG. 1 , a reinforcing rib 46 is provided at the central portion of the second pin member 37 of the connecting portion 38a in the axial direction so as to be connected to the internal thread portion 38b. Figure 1 and Figure 2As shown, the side surface 46 a of the reinforcing rib 46 facing the pipe member 22 , i.e., the side surface of the bolt threading member 38 facing the pipe member 22 , is inclined in a direction away from the pipe member 22 as it extends from the second pin member 37 side toward the head 43 side of the bolt 41 .

[0053] like Figure 4 As shown, a U-shaped notch 51 is formed at the other end 24b of the cover member 24. The U-shaped notch 51 is formed at the other end 24b of the cover member 24 in a manner that the first pin member 26 side is blocked and the side opposite to the first pin member 26 is open, and extends in the longitudinal direction of the cover member 24 by a predetermined length with an opening width that allows the rod 42 of the bolt 41 to be inserted. The predetermined length is longer than the outer diameter of the head 43 of the bolt 41.

[0054] A flat bolt contact surface 52 against which the washer portion 43 b of the head portion 43 of the bolt 41 contacts is formed on the side opposite to the bolt screwing member 38 in the portion of the other end portion 24 b of the cover member 24 where the U-shaped notch 51 is formed.

[0055] In order to make the clamp 21 constructed in this way clamp the pipe member 22, first, Figure 4 As shown in FIG. 1 , the bolt 41 is removed from the bolt screwing member 38 and the cover member 24 is opened, and the pipe member 22 is inserted between the main body member 23 and the cover member 24. Next, the cover member 24 is overlapped on the pipe member 22 in a manner of covering. Figure 7 As shown, the shaft portion 42 of the bolt 41 is inserted into the U-shaped notch portion 51 and the bolt 41 is screwed into the bolt screwing member 38 .

[0056] Figure 7 The state at the start of tightening the bolt 41 is shown, where the bolt 41 is screwed into the bolt screwing member 38 until the head 43 of the bolt 41 touches the cover member 24. At this time, that is, at the start of the rotation operation of the bolt 41 at the head 43, a gap S1 is generated between the bolt screwing member 38 and the pipe member 22.

[0057] If the bolt 41 is rotated at the head 43 of the bolt 41 in this state, a pulling force F toward the head 43 side acts on the bolt screwing member 38 into which the shank 42 of the bolt 41 is screwed. When the bolt 41 is rotated, the tool 53 is engaged with the head 43 and the tool 53 is rotated to perform the rotation operation. The tool 53 can be a manual ratchet wrench or an electric wrench (electric tool).

[0058] The arrangement position of the second pin member 37 connecting the bolt screwing member 38 to the main body member 23 is eccentric (offset) to the pipe member 22 side by a distance L relative to the bolt axis A of the bolt 41 whose rod portion 42 is screwed into the bolt screwing member 38. Therefore, a torque M1 acts on the bolt screwing member 38 toward the pipe member 22 side centered on the second pin member 37 due to the pulling force F. As the torque M1 acts on the bolt screwing member 38 in this way, the bolt screwing member 38 rotates toward the pipe member 22 side centered on the second pin member 37.

[0059] As a result, the bolt 41 whose rod portion 42 is screwed into the bolt screwing member 38 also rotates (swings) toward the pipe member 22 side around the second pin member 37 integrally with the bolt screwing member 38. As a result, Figure 7 As shown by the two-dot chain line, the rod 42 of the bolt 41 moves toward the first pin member 26 inside the U-shaped notch 51. By further screwing the bolt 41 into the bolt screwing member 38, the rod 42 of the bolt 41 further approaches the pipe member 22, and the rod 42 can also reach the end 51a of the U-shaped notch 51 on the first pin member 26 side.

[0060] The screwing in of the bolt 41, i.e., the rotation operation of the bolt 41 by the tool 53, ends when the rotation operation of the bolt 41 at the head 43 becomes impossible. The rotation operation becomes impossible when the tool 53 (for example, a manual ratchet wrench) can no longer be physically turned, or when the rotation operation by the power tool reaches the limit of the tightening torque value set for the power tool.

[0061] When the rotation operation of the bolt 41 is completed, Figure 2 As shown, the rod portion 42 of the bolt 41 can reach the end portion 51 a of the U-shaped notch portion 51 which is the closed side on the first pin member 26 side.

[0062] The tightening torque applied to the bolt 41 when the rotation operation of the bolt 41 becomes impossible is preferably within the range of the lower limit and the upper limit of the appropriate value determined in advance. In the clamp 21 of this embodiment, the rod 42 is located at the end 51a of the U-shaped notch 51 on the first pin member 26 side or in the vicinity of the end 51a when the tightening torque of the bolt 41 is within the range of the lower limit and the upper limit of the appropriate value.

[0063] like Figure 1 and Figure 2As shown in FIG. 1 , even when the rotation operation of the bolt 41 is completed, a gap S1 is generated between the bolt screwing member 38 and the pipe member 22. That is, in the clamp 21, a gap S1 is generated between the bolt screwing member 38 and the pipe member 22 from the start to the end of the rotation operation of the bolt 41 at the head 43. It should be noted that if the bolt screwing member 38 abuts against the pipe member 22 during the rotation operation of the bolt 41, the bolt screwing member 38 after the abutment no longer rotates toward the pipe member 22 side with the second pin member 37 as the center, and therefore the rod portion 42 of the bolt 41 cannot be further moved toward the first pin member 26 side in the U-shaped notch portion 51.

[0064] However, in the clamp 21 of this embodiment, a gap S1 is generated between the bolt screwing-in member 38 and the pipe member 22 from the beginning to the end of the rotation operation of the bolt 41, and the rotation of the bolt screwing-in member 38 is not restricted by the pipe member 22, so that the rod portion 42 of the bolt 41 can be moved toward the first pin member 26 side in the U-shaped notch portion 51 until the screwing-in is completed.

[0065] Thus, in the clamp of this embodiment, since the rod portion 42 of the bolt 41 is moved toward the first pin side in the U-shaped notch by tightening the bolt 41, it is possible to prevent the rod portion 42 of the bolt 41 from moving toward the end portion of the U-shaped notch 51 on the side opposite to the first pin member 26, that is, from coming out of the U-shaped notch 51.

[0066] In addition, if Figure 7 As shown in the figure, when the pulling force F acts on the bolt screwing member 38, a torque M2 in the direction of closing the main body member 23 with respect to the cover member 24 around the first pin member 26 acts on the main body member 23 via the bolt screwing member 38. With this torque M2, the main body member 23 rotates in the direction of closing with respect to the cover member 24 with the first pin member 26 as the center, and the main body member 23 and the cover member 24 clamp and tighten the pipe member 22 together.

[0067] If the bolt screwing member 38 abuts against the pipe member 22 during the tightening, the main body member 23 after the abutment becomes unable or almost unable to rotate around the first pin member 26 due to the friction between the bolt screwing member 38 and the pipe member 22. Therefore, it is difficult to tighten the pipe member 22 with a large force using the main body member 23 and the cover member 24. However, in the clamp 21 of this embodiment, there is a gap S1 between the bolt screwing member 38 and the pipe member 22, and the gap S1 is also ensured during the tightening, so the bolt screwing member 38 can continue to rotate in the direction of closing with respect to the cover member 24 around the first pin member 26. Therefore, by rotating the head 43 of the bolt 41 to the end, the pipe member 22 can be tightened with a large force using the main body member 23 and the cover member 24.

[0068] Therefore, according to this embodiment, it is possible to provide a clamp that makes it difficult for the rod portion 42 of the bolt 41 to come out of the U-shaped notch portion 51 and that can firmly fasten the pipe member 22 .

[0069] In the clamp 21 of this embodiment, as described above, the end of the rotation operation of the bolt 41 at the head 43 means when the rotation operation of the bolt 41 at the head 43 becomes impossible. Therefore, the rod 42 of the bolt 41 can be brought as close to the end of the first pin member 26 as possible in the U-shaped notch 51, so that the rod 42 of the bolt 41 is further difficult to come out of the U-shaped notch 51, and the pipe member 22 can be further firmly fastened by the main body member 23 and the cover member 24.

[0070] In addition, in this embodiment, as described above, when the rotation operation of the bolt 41 at the head 43 becomes impossible when using an electric wrench (electric tool) means that the rotation operation performed by the electric wrench reaches the limit of the tightening torque value set for the electric tool. Therefore, it is possible to prevent the tightening torque of the bolt 41 from deviating for each clamp 21, and the management of the tightening torque of the bolt 41 becomes easy.

[0071] In the clamp 21 of this embodiment, when the rod 42 of the bolt 41 reaches the end 51a on the first pin member 26 side of the U-shaped notch 51, the rotation operation of the bolt 41 at the head 43 is completed. The end 51a on the first pin member 26 side of the U-shaped notch 51 is a closed end of the U-shaped notch 51, and is therefore the strongest portion of the U-shaped notch 51. Therefore, in order to tighten the pipe member 22 with a large force using the main body member 23 and the cover member 24, the tightening state of the pipe member 22 can be made firm by rotating the head 43 of the bolt 41 at the strongest portion.

[0072] In the clamp 21 of this embodiment, the surface of the bolt screwing member 38 facing the pipe member 22 (the side surface 46a of the reinforcing rib 46) is inclined in a direction away from the pipe member 22 as it extends from the second pin member 37 side to the head 43 side of the bolt 41. Therefore, it is possible to more reliably prevent the bolt screwing member 38 from abutting against the pipe member 22 when the bolt screwing member 38 rotates toward the pipe member 22 side around the second pin member 37.

[0073] The bolt screwing member 38 of this embodiment is directly provided with the internal threaded hole 44 into which the shank 42 of the bolt 41 is screwed. Therefore, compared with the case where the bolt screwing member 38 is formed by bending a plate material, the bolt screwing member 38 can be firmly formed by forging, casting or sintering metal.

[0074] In the clamp 21 of this embodiment, the second pin member 37 is disposed at a position offset toward the pipe member 22 relative to the internal threaded hole 44 of the bolt screwing member 38 into which the shank 42 of the bolt 41 is screwed, with respect to the bolt axis A. Therefore, the eccentric distance L of the second pin member 37 relative to the bolt axis A can be made large, and a large torque M1 can be applied to the bolt screwing member 38. As a result, the shank 42 of the bolt 41 can be made to more reliably approach the end 51a of the U-shaped notch 51 on the first pin member 26 side.

[0075] (Modification of pipe member)

[0076] Pipe components can be used Figure 1 and Figure 2 The tubular member 22 shown is a small diameter tubular member. Figure 8 FIG. 2 shows a clamp 21 for clamping a small-diameter pipe member. Figure 8 The state in which the bolt rotation operation is completed is shown. Figure 8 The clamp 21 shown is Figure 1 to Figure 7 The clamp 21 shown is the same, clamping a pipe member 61 of a small diameter.

[0077] Since the small-diameter pipe member 61 is sandwiched between the main body member 23 and the cover member 24 , a gap S2 is generated between the other end portion 23 b of the main body member 23 and the small-diameter pipe member 61 from the start to the end of the rotation operation of the bolt 41 at the head portion 43 .

[0078] Therefore, until the rotation operation of the bolt 41 is completed, the torque M2 centered on the first pin member 26 continues to act on the main body member 23, and the main body member 23 rotates in the direction of closing relative to the cover member 24 centered on the first pin member 26, and cooperates with the cover member 24 to clamp and tighten the small-diameter pipe member 22. Therefore, even a small-diameter pipe member 61 can be firmly clamped by the clamp 21 of this embodiment.

[0079] (Modification of bolts screwed into components)

[0080] Bolts screwed into components can be Fig. 9 and Fig.10 As shown in the figure. Fig. 9 and Fig.10 About and use Figure 1 to Figure 7 The same or equivalent components are denoted by the same reference numerals, and detailed description is appropriately omitted.

[0081] Fig. 9 The bolt screwing member 62 shown includes an internal thread member 64 provided with an internal thread hole 63 into which the shaft portion 42 of the bolt 41 is screwed, and a rotating member 65 to which the internal thread member 64 is fixed and which is rotatable around the second pin member 37 .

[0082] Fig. 9 The rotating member 65 shown is different from the internal threaded portion 38b of the bolt screwing member 38 shown in the above-mentioned embodiment only in that a fifth through hole 67 is formed instead of the internal threaded hole 44. The fifth through hole 67 penetrates the rotating member 65 formed in a block shape. In order to prevent the internal threaded member 64 from coming out, the hole diameter of one end 67a of the cover member 24 side of the fifth through hole 67 is smaller than the hole diameter of other parts. The internal threaded member 64 can use a cylindrical finished product formed with an internal threaded hole 63, and the internal threaded member 64 is pressed into the fifth through hole 67 from the other end of the fifth through hole 67 and fixed to the rotating member 65.

[0083] Fig.10 The bolt screwing member 71 shown includes a nut 73 as an internally threaded member provided with an internally threaded hole 72 into which the shank 42 of the bolt 41 is screwed, and a rotating member 74 to which the nut 73 is fixed and which is rotatable about the second pin member 37 .

[0084] Fig.10 The rotating member 74 shown is formed into a predetermined shape by bending a metal plate, and has a pair of vertical walls 74a, 74a arranged in the axial direction of the second pin member 37 and a horizontal wall 74b connecting one end of the vertical walls 74a, 74a to each other. The interval between the pair of vertical walls 74a, 74a is an interval that can engage the nut 73 between the vertical walls 74a so that the nut 73 cannot rotate and surround and hold the nut 73. The horizontal wall 74b is formed with a sixth through hole 75 into which the rod 42 of the bolt 41 can be inserted.

[0085] The nut 73 is welded to the vertical wall 74a or the horizontal wall 74b in a state where one end of the internal threaded hole 72 in the axial direction abuts against the horizontal wall 74b of the rotating member 74. It should be noted that, although not shown, by forming a protrusion on the vertical wall 74a to prevent the nut 73 from falling off, the nut 73 can be held on the rotating member 74 without welding.

[0086] Even if Fig. 9 and Fig.10 The bolt screwing components 62, 71 are constructed as shown, and the rod portion 42 of the bolt 41 can be screwed into the internal threaded holes 63, 72 to make the rod portion 42 of the bolt 41 close to the end portion 51a of the U-shaped notch portion 51, so that the rod portion 42 of the bolt 41 is difficult to escape from the U-shaped notch portion 51, and the pipe component 22 can be firmly fastened.

[0087] In addition, by adopting Fig. 9 and Fig.10 The structure shown is similar to the Figure 1 to Figure 7 Compared with the case of the illustrated embodiment, it is not necessary to process the internal thread hole in the block-shaped bolt-tightening member, and therefore the bolt-tightening members 62 and 71 can be easily manufactured.

[0088] (Other embodiments of the clamp)

[0089] The clamp 21 of the present invention can be Figure 11 to Figure 13 As shown in the figure. Figure 11 to Figure 13 About and use Figure 1 to Figure 7 The same or equivalent components are denoted by the same reference numerals, and detailed description is appropriately omitted.

[0090] exist Fig.11 The orthogonal fixture 81 is shown in FIG. Fig.12 The free clamp 82 is shown in FIG. Fig.13 A wall connection 83 is shown in FIG.

[0091] Fig.11 The orthogonal fixture 81 and Fig.12 The free clamp 82 shown uses two Figure 1 to Figure 7 It is composed of the clamp (single clamp) 21 shown. Fig.11 The orthogonal jig 81 shown is obtained by overlapping and joining the main body members 23 with the two jigs 21 in a posture where the axes of the pipe member 22 are orthogonal to each other. The main body members 23 can be joined together by, for example, caulking (not shown).

[0092] Fig.12The free clamp 82 shown is formed by connecting the main body members 23 of the two clamps 21 to each other by a connecting member 84. The connecting member 84 connects the main body members 23 to each other so that they can rotate freely. Therefore, the angle between the pipe member 22 clamped by one clamp 21 and the pipe member 22 clamped by the other clamp 21 can be set to any angle.

[0093] Fig.13 The wall connector 83 shown is used to fix the pipe member 22 to the wall 85 of the building. The wall connector 83 is composed of a support member 88 having an external thread member 87 threadedly engaged with an anchor member 86 embedded in the wall 85, a sliding member 89, and a clamp 21, etc. The support member 88 has an external thread member 87 threadedly engaged with an anchor member 86 embedded in the wall 85, the sliding member 89 is movably engaged with the support member 88, and the clamp 21 is welded to the top end of the sliding member 89.

[0094] In the orthogonal clamp 81 , the free clamp 82 , and the wall connector 83 configured using the clamp 21 of the present invention, the bolt 41 is less likely to come out than in the conventional structure, and the pipe member 22 is firmly fastened and reliably clamped.

[0095] Industrial Applicability

[0096] The present invention can be used as a clamp for clamping and fixing a pipe member of a temporary structure such as a temporary scaffold or a support frame.

[0097] Description of Reference Numerals

[0098] 1…clamp, 22…tube member as a clamped member, 23…body member as a first clamping member, 24…cover member as a second clamping member, 23a, 24a…one end, 23b, 24b…the other end, 26…first pin member, 37…second pin member, 38…bolt screwing member, 41…bolt, 42…rod, 43…head, 44, 63, 72…internal threaded hole, 46a…side surface as a surface facing the clamped member, 51…U-shaped notch, 53…tool, 64…internal threaded member, 65, 74…rotating member, 73…nut as an internal threaded member, A…bolt axis, S1, S2…clearance.

Claims

1. A clamp, comprising: a first clamping member and a second clamping member, one end of which is rotatably connected to each other by a first pin member; a bolt screwing member, which is rotatably connected to the other end of the first clamping member by a second pin member; and a bolt, a rod of which is inserted into a U-shaped notch formed at the other end of the second clamping member in a manner that the first pin member side is blocked and the side opposite to the first pin member side is open, the rod is screwed into the bolt screwing member, and the head of the bolt abuts against a portion of the other end of the second clamping member on the side opposite to the bolt screwing member side, The first clamping member and the second clamping member clamp the clamped member by rotating the bolt at the head portion. The second pin member is disposed at a position eccentric to the clamped member side relative to the bolt axis of the bolt whose rod is screwed into the bolt screwing member, and the clamp is characterized in that: From the start to the end of the rotation operation of the bolt at the head, a gap is generated between the bolt-tightening member and the clamped member.

2. The clamp according to claim 1, characterized in that: The end of the rotation operation of the bolt at the head portion refers to a time when the rotation operation of the bolt at the head portion becomes impossible.

3. The clamp according to claim 2, characterized in that: The rotating operation of the bolt at the head is performed by an electric tool, The time when the rotation operation of the bolt at the head becomes impossible means when the rotation operation by the electric power tool reaches a limit.

4. The clamp according to any one of claims 1 to 3, characterized in that: When the shaft portion of the bolt reaches the end portion of the U-shaped notch portion on the first pin member side, the rotation operation of the bolt at the head portion is completed.

5. The clamp according to claim 1, characterized in that: A surface of the bolt-tightening member that faces the clamped member is inclined in a direction away from the clamped member as it extends from the second pin member side toward the head side of the bolt.

6. The clamp according to claim 1, characterized in that: The bolt screwing member is directly provided with an internal thread hole into which the shank of the bolt is screwed.

7. The clamp according to claim 1, characterized in that: The bolt screwing member includes: an internal thread member provided with an internal thread hole into which the shank of the bolt is screwed; and a rotating member that fixes the internal thread member and is rotatable around the second pin member.

8. The clamp according to claim 1, characterized in that: From the start to the end of the rotation operation of the bolt at the head portion, a gap is generated between the other end portion of the first clamping member and the clamped member.

9. The clamp according to claim 1, characterized in that: The second pin member is disposed at a position offset toward the clamped member with respect to the internal threaded hole of the bolt-tightening member into which the bolt is screwed.

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