JP2008133943A - Clamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamp for preventing the fall-off of a nut from a bolt. <P>SOLUTION: One end of a first clamping member 41 is connected to one end of a second clamping member 42 so as to be turnable via a connection member 43. The nut 48 is threaded to the bolt 46 whose base end is connected to the other end of the first clamping member 41 so as to be turnable. Relative to the bolt 46 inserted into a U-shaped cut-out portion formed at the other end of the second clamping member 42, the second clamping member 42 is turned around the connection member 43 by the pressing operation of the nut 48 when rotated. Thereby, a clamped member 3 is clamped by the first clamping member 41 and the second clamping member 42. At the tip of the bolt 46 on the opposite side to the base end, a nut stop portion 52 is arranged by the installation or the like of a stop member 53 for preventing the fall-off of the nut 48 from the bolt 46. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a clamp for clamping a member used in various work sites including a construction site, a demolition site, and a civil engineering site.

Patent Document 1 below shows a clamp that is used to clamp a member to be clamped such as a pipe material at various construction sites including a construction site, a demolition site, and a civil engineering site. The clamp includes a first and second holding member, a connecting member that rotatably connects one end of each of the first holding member and the second holding member, and the other end of the first holding member. A bolt having a base end rotatably connected thereto, a nut screwed into the bolt, and a U-shaped notch formed at the other end of the second holding member. When the nut is rotated with respect to the bolt inserted into the U-shaped notch, the second clamping member is rotated about the connecting member by the pressing action of the nut, and thereby the first clamping member and the first clamping member are rotated. A sandwiched member such as a pipe is sandwiched between the two sandwiching members.
JP 10-31139 A

  In recent years, an electric tool has been adopted as a tool for rotating a nut in order to improve work efficiency at a work site or the like. In this electric tool, a socket member, which is a rotating member fitted to the outer periphery of a nut, is rotated forward and backward by an electric motor, and the sandwiched member is sandwiched between the first sandwiching member and the second sandwiching member. When the socket member is released, the nut rotates backward with respect to the bolt due to the reverse rotation of the socket member. Therefore, when the socket member is rotated excessively reversely, the nut falls from the tip end of the bolt opposite to the base end. There is a risk of it. Such a problem also occurs when the nut is rotated by a manual tool.

  An object of the present invention is to provide a clamp that can prevent a nut from falling off a bolt.

  The clamp according to the present invention includes a first and second clamping member, a connecting member that pivotally connects one end of each of the first clamping member and the second clamping member, and the first clamping A bolt whose base end is rotatably connected to the other end of the member; a nut screwed into the bolt; and a U-shaped notch formed at the other end of the second clamping member And the second clamping member is rotated about the connecting member by the pressing action of the nut rotated with respect to the bolt inserted into the U-shaped notch, and the first clamping member And a clamp that clamps the member to be clamped by the second clamping member, and a nut stop portion for preventing the nut from dropping off from the bolt at a distal end portion of the bolt opposite to the base end portion. It is characterized by being provided.

  According to this clamp, a nut stop portion for preventing the nut from falling off from the bolt is provided at the tip of the bolt opposite to the base end portion, so that the electric tool is used as a tool for rotating the nut. Even if a tool or a manual tool is used, the nut stop portion can prevent the reversely rotated nut from dropping from the tip end portion of the bolt.

  Further, in the clamp according to the present invention, the nut idle rotation in which the nut idly rotates a portion of the bolt adjacent to the nut stop portion, which is the base end side of the nut stop portion. Part. If such a nut idle rotation part is provided on the bolt, the nut abuts against the nut stop part, thereby preventing the nut from falling off from the tip of the bolt, and then the nut is further reversed with an electric tool. Even if the nut is rotated, the nut only rotates idly, so that the nut can be prevented from being strongly pressed against the nut stop portion.

  Such a nut idle | rotating part can be provided in a volt | bolt by arbitrary forms.

  In the first example, the whole nut empty rotating part is formed in a non-tapered shape having a smaller diameter than the bolt part on which the thread is formed, whereby the nut empty rotating part is entirely threaded. It is to make it the part which is not provided.

  In the second example, the nut idle rotating portion is tapered to the tip side of the bolt, and the end of the tapered nut idle rotating portion on the base end side is connected to the screw thread of the bolt. It is to provide a screw thread having continuity.

  According to the second example, when the nut held in the nut idle rotating part is rotated forward in order to hold the member to be held between the first clamping member and the second clamping member, the tapered nut idle rotating part Since the screw thread having continuity with the screw thread of the bolt is provided at the end on the base end side of the nut, the nut smoothly transitions from the taper nut idle rotation part to the screw thread of the bolt. As a result, the work of holding the member to be held between the first holding member and the second holding member can be performed smoothly.

  Such a tapered nut idle rotating part is formed, for example, by performing a process on the bolt to eliminate a part of the thread formed in the tapered nut idle rotating part while leaving the continuity. Can do. This vanishing process may be, for example, a cutting process, a grinding process, or a crushing process.

  Further, the above-described non-tapered or tapered nut idle rotating portion may not be provided on the bolt, and a thread formed on the bolt for screwing the nut may be formed up to the nut stop portion.

  Even if the thread formed on the bolt for screwing the nut in this way is formed up to the nut stop portion, the driving force for rotating the nut in reverse using the electric tool with a clutch is a predetermined value. When the above-mentioned excessive size is reached, the transmission of the driving force to the socket member that reversely rotates the nut is disconnected by the clutch, thereby preventing the nut from being strongly pressed against the nut stop portion. .

  Moreover, the nut stop part provided in the front-end | tip part of a volt | bolt can be formed with arbitrary forms.

  The 1st example is forming a nut stop part by the stop member attached to the front-end | tip part of a volt | bolt.

  A second example is to form the nut stop portion by plastic deformation of the tip end portion of the bolt. According to the second example, since the nut stop portion can be formed by a part of the bolt, the number of members that must be prepared can be reduced. The plastic deformation process in the second example may be a compression process including an upsetting process, a crushing process, a pulling process, or an opening process.

  A third example is to form the nut stop portion by a double nut made up of two nuts.

  In this third example, the screw thread formed on the bolt may be used as it is as the screw thread in which the two nuts are screwed together.

  According to this, two nuts can be screwed onto the bolt using the thread originally formed on the bolt, and a double nut serving as a nut stop portion can be provided on the bolt by these nuts. .

  In the case where the above-described non-tapered or tapered nut idle rotating portion is provided on the bolt, the nut idle rotating portion may be formed by a process of eliminating at least a part of the thread formed on the bolt. Good.

  Also, the nut can be any form of nut.

  The 1st example is making a nut into the normal nut by which the outer periphery is formed in a polygon and the screw hole is formed in the inside.

  In a second example, a nut is a polygonal part that fits on the outer periphery of a tool for rotating the nut, and a cylindrical part provided on the base end side of the bolt with respect to the polygonal part. A screw hole that is screwed into a screw thread of the bolt is formed inside the cylindrical portion, and the inside of the polygonal portion is continuous with the screw hole and has a larger diameter than the screw hole. The large-diameter hole is formed, and the large-diameter hole is provided with a contact portion that contacts the nut stop portion and prevents the nut from falling off the bolt.

  According to the second example, when the nut contact portion comes into contact with the nut stop portion and the nut does not fall off from the bolt, it is possible to prevent the nut stop portion from protruding from the nut. The total length of the bolt can be shortened. For this reason, for example, when a large number of clamps are packed and conveyed, the bolt is rotated around the base end portion so that the bolt is accommodated inside the first clamping member and the second clamping member. Thus, the entire clamp can be reduced in size, and the number of clamps stored in one box can be increased.

  In the present invention, the distance from the center of rotation of the base end of the bolt to the tip of the bolt is A, and from the center of rotation of the base of the bolt to the center of the connecting member. Is set so that the inequality of A <B−C is established, where B is the distance and C is the radius of the connecting member.

  According to this, when the bolt is rotated around the base end portion, the tip end portion of the bolt can freely rotate one end portion of each of the first clamping member and the second clamping member. The bolt can be accommodated inside the first clamping member and the second clamping member without coming into contact with the connecting member connected to the first and second clamping members, whereby the entire clamp can be reduced in size. The number of clamps stored in the box can be increased, and the conveyance efficiency when a large number of clamps are packed and conveyed can be improved.

  The present invention described above is a clamp in which the number of first clamping members and the number of second clamping members is one, i.e., a clamping portion for clamping a member to be clamped by the first clamping member and the second clamping member. The present invention can be applied to a single clamp in which the number is one, and the clamp in which the number of the first clamping member and the second clamping member is two, that is, the first clamping member and the second clamping member. The present invention can also be applied to an orthogonal clamp or a universal clamp in which the number of clamping parts for clamping the clamped member is two.

  The present invention can also be applied to single work clamps for various work site equipment constituted by using one or a plurality of single clamps. Root brackets, brackets, catch clamps, and wall joints used at the construction site and the construction work site.

  The clamp according to the present invention is particularly useful when an electric tool is used to rotate the nut. However, the clamp according to the present invention is manually operated as a tool for rotating the nut. It can also be applied when a tool is used.

  According to the present invention, it is possible to prevent the nut from falling off the bolt even if the nut is rotated in reverse by the tool.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on drawing. FIG. 1 shows, for example, a barricade 1 used in a construction work site. This barricade 1 is used for connecting two end members 2 at both ends and these end members 2 having an A shape. The upper and lower two pipe-made connecting members 3 are configured, and the upper and lower two single clamps 10 are coupled to the respective end members 2 by welding, bolts, or nuts. The two end members 2 are connected via the connecting member 3 by sandwiching the end portions of the three.

  FIG. 2 shows a side view of the single clamp 10, and FIG. 3 shows a front view of the single clamp 10. As shown in FIGS. 2 and 3, the single clamp 10 includes a first clamping member 41 and a second clamping member 42 as main members, and these clamping members 41, 42. Is formed by pressing a sheet metal. Further, as shown in FIG. 2, one end portions 41 </ b> A and 42 </ b> A of the first clamping member 41 and the second clamping member 42 facing each other are clamped members that are clamped by the single clamp 10. The connecting member 3 is connected by a connecting pin 43 whose axial direction is parallel to the longitudinal direction of the connecting member 3, thereby providing a connecting member for connecting the first and second holding members 41, 42. The first pinching member 41 and the second pinching member 42 are rotatable with respect to the connecting pin 43, that is, openable and closable in other words. The single clamp 10 shown in FIG. 1 has a surface opposite to the second clamping member 42 of the first clamping member 41 that is joined to the end member 2 by welding, bolts, or nuts. It is fixed.

  The main portions 41B, 42B of the first and second clamping members 41, 42 have a curved shape or a substantially curved shape corresponding to the outer shape of the connecting member 3, and one end portion 41A of the first clamping member 41 is As shown in FIG. 3, a bifurcated portion 44 is formed on the other end portion 41 </ b> C that is opposite to the main portion 41 </ b> B, and one end of the second clamping member 42 is formed. A U-shaped notch 45 is formed at the other end 42C that is opposite to the portion 42A across the main portion 42B. A base end portion 46A of a bolt 46 is inserted into the bifurcated portion 44, the base end portion 46A is rotatably connected to the forked portion 44 by a connecting pin 47, and the bolt 46 is attached to the first clamping member 41. Since the axial direction of the connecting pin 47, which is a connecting member for connecting, is the same as the axial direction of the connecting pin 43, the bolt 46 is connected to the connecting member 3 and the connecting pin 43 around the base end portion 46A. , 47 is rotatable in a direction orthogonal to the axial direction of the shaft 47, and the bolt 46 is inserted into the U-shaped notch 45 of the second clamping member 42 by this rotation.

  A nut 48 is screwed onto the bolt 46. The nut 48 protrudes from the U-shaped notch 45 and is screwed into a portion of the bolt 46 inserted into the U-shaped notch 45, and the electric motor shown in FIG. After the socket member 49 that is a rotary member of the tool is fitted, when the socket member 49 is rotated forward, a nut 48 that rotates forward with respect to the bolt 46 and advances is provided on the outer surface of the U-shaped notch 45. By abutting on both sides, the other end portion 42C of the second clamping member 42 receives the pressing force from the nut 48, whereby the second clamping member 42 is moved to the first clamping member 41 around the connecting pin 43. The connecting member 3 is clamped by the first clamping member 41 and the second clamping member 42.

  Further, when the socket member 49 is rotated in the reverse direction, the nut 48 is loosened. Therefore, after the bolt 46 is rotated so as to be pulled out from the U-shaped notch 45, the second clamping member 42 is first clamped around the connecting pin 43. By opening and rotating from the member 41, the holding of the connecting member 3 by the first holding member 41 and the second holding member 42 can be released.

  FIG. 4 shows only the bolt 46 and the members disposed on the bolt 46. The bolt 46 is a portion that forms the base end portion 46 </ b> A, and is a thick ring-shaped portion 50 provided with a hole 50 </ b> A through which the connecting pin 47 is inserted at the center, and the ring-shaped portion 50. An end portion of the shaft portion 51 opposite to the ring-shaped portion 50, in other words, a tip end portion 46B of the bolt 46 opposite to the base end portion 46A, A nut stop portion 52 is provided to prevent the nut 48 from falling off the tip end portion 46B. The nut stop portion 52 has a diameter larger than the maximum outer diameter of the shaft portion 51 and smaller than the outer diameter of the nut 48.

  Further, the shaft portion 51 is formed with a screw thread portion 51A in which a screw thread is not formed and a screw thread for screwing the nut 48 in order from the ring-shaped portion 50 toward the nut stop portion 52. A threaded portion 51B and a nut idle rotating portion 51C for idly rotating the nut 48 are provided. The nut idle rotating portion 51C is a portion adjacent to the nut stop portion 52, and includes a nut It is a part on the ring-shaped part 50 side from the stop part 52. In FIG. 4, the range of the threaded portion 51B is indicated by L1, and the range of the nut idle rotation portion 51C is indicated by L2. The range of the threaded portion 51B may be expanded to the range of the threadless portion 51A.

  The nut idle rotating portion 51C is specifically cut by performing a process of eliminating a part of the screw thread originally formed in the portion of the shaft portion 51 corresponding to the nut idle rotating portion 51C. This cutting process is a taper process in which the cutting depth into the shaft part 51 is gradually deepened from the connecting part with the threaded part 51B to the tip part 46B side of the bolt 46, thereby eliminating the nut emptying. The rotating portion 51C has a tapered shape that tapers toward the tip end portion 46B.

  For this reason, a thread having a continuity with the thread of the threaded portion 51B is left at the end of the tapered nut idle rotation portion 51C on the threaded portion 51B side, and the taper The height of the thread in the idly nut-rotating portion 51 </ b> C gradually decreases as the bolt 46 moves toward the tip end portion 46 </ b> B side.

  In this embodiment, the stop member 53 is a nut stop portion 52 by attaching the stop member 53 to the end portion of the shaft portion 51. FIG. 5 shows an operation of attaching the stop member 53 to the end portion of the shaft portion 51. In order to perform this operation, first, the diameter of the nut idle rotating portion 51C that protrudes from the end opposite to the threaded portion 51B is cut to a diameter larger than the minimum diameter portion of the nut idle rotating portion 51C. After forming the small-diameter portion 51D having a small diameter and then fitting the hole 53A of the stop member 53 into the small-diameter portion 51D, the small-diameter portion 51D is compressed in the axial direction, thereby forming a tapered nut idle rotation portion 51C. The stop member 53 is clamped and fixed to the shaft portion 51 by the bulging portion 51E of FIG. 6 formed by the small diameter portion 51D bulging and deforming in the radial direction.

  According to the above embodiment, as described above, the nut 48 is reversely rotated by the socket member 49 of the electric tool in order to release the coupling member 3 by the first clamping member 41 and the second clamping member 42. In this case, even if the reverse rotation is excessively performed, the nut 48 retracted toward the tip end portion 46B side of the bolt 46 comes into contact with the stop member 53 serving as the nut stop portion 52 provided on the tip end portion 46B. Therefore, the nut 48 can be prevented from dropping from the bolt 46.

  Further, when the nut 48 comes into contact with the nut stop member 53, the nut 48 reaches the nut idle rotating portion 51C where the nut 48 can be idled, so that the reverse rotation of the socket member 49 is stopped. Even if the operation timing of the electric tool for delaying is delayed, the nut 48 only rotates idly, so that the nut 48 can be prevented from being strongly pressed against the stop member 53 and the reverse rotation of the socket member 49 is stopped. Since the operation timing of the tool can be set to an arbitrary timing, the operation of the electric tool is facilitated.

  Further, when the connecting member 3 is clamped by the first clamping member 41 and the second clamping member 42, the nut 48 in the tapered nut idle rotation portion 51C is rotated forward by the socket member 49 of the electric tool. As described above, a thread having continuity with the thread of the threaded portion 51B is left at the end of the tapered nut idle rotating portion 51C on the threaded portion 51B side. Therefore, the nut 48 smoothly transitions from the nut idle rotation portion 51C to the threaded portion 51B, and thus the coupling member 3 is clamped by the first clamping member 41 and the second clamping member 42. Work can be done smoothly.

  7 and 8 show another embodiment of an operation for forming the bulging portion 51E of FIG. 6 on the shaft portion 51 in order to attach the stop member 53 to the end portion of the shaft portion 51 of the bolt 46. FIG. In the operation of FIG. 7, after fitting the hole 53A of the stop member 53 to the small diameter portion 51D of FIG. 5, a driving tool 54 such as chisel is driven and extracted from the end surface of the small diameter portion 51D, and the small diameter portion 51D is driven by this driving. The bulging part 51E is formed in the. Further, in the embodiment of FIG. 8, the cutting tool 54 for cutting out the driving tool 54 driven into the end face of the small-diameter portion 51D and leaving a part 54A of the tool 54 inside the bulging portion 51E is performed. Yes.

  According to the embodiment of FIG. 7 and FIG. 8, it is not necessary to perform the above-described compression processing for the small diameter portion 51 </ b> D that requires a lot of labor and a large processing load. The work for forming 51E can be simplified. Further, according to the embodiment of FIG. 8, since a part 54A of the tool 54 remains inside the bulging portion 51E, the shape of the bulging portion 51E can be maintained over a longer period than the embodiment of FIG. it can.

  FIG. 9 shows an embodiment in which the nut stop portion 52 provided on the shaft portion 51 of the bolt 46 is formed by a double nut 57 formed by two nuts 55 and 56, and each nut 55 and 56 is formed by the shaft portion 51. And has a diameter smaller than that of the nut 48 screwed into the threaded portion 51B. Therefore, like the stop member 53, these nuts 55 and 56 can be inserted into the socket member 49 of the electric tool for rotating the nut 48.

  FIG. 10 shows an operation for attaching the double nut 57 of this embodiment to the end portion of the shaft portion 51. In this embodiment, the thread 51 formed in the shaft part 51 is left as it is in the part 51F corresponding to the small diameter part 51D of the embodiment of FIG. 5 in the shaft part 51, and a nut is added to the thread of this part 51F. 55 and 56 are screwed together by forward rotation, and even after the rear nut 56 abuts on the front nut 55, the rear nut 56 is further rotated forward so that the nuts 55 and 56 and the nut 55 and 56 and the thread of the part 51F are brought into frictional contact with a large load, whereby a double nut 57 arranged in a fixed state at the end of the shaft portion 51 is provided by two nuts 55 and 56.

  According to this embodiment, when the nut 48 abuts against the double nut 57 while rotating reversely by the socket member 49 of the electric tool, of the two nuts 55, 56, the front nut 55 against which the nut 48 abuts. , A reverse rotation load from the nut 48 acts on the two nuts 55, 56 and the load for frictionally contacting the nuts 55, 56 and the thread of the portion 51F with a larger load. Therefore, the double nut 57 can be securely arranged at the end of the shaft portion 51 in a fixed state.

  Further, according to this embodiment, only the processing for forming the tapered nut idle rotation portion 51C on the shaft portion 51 can be performed, and the thread formed on the portion 51F of the shaft portion 51 can be left as it is. Therefore, it is possible to simplify the processing performed on the screw thread originally formed on the shaft portion 51 as compared with the previous embodiments.

  Next, an embodiment in which the nut stop portion 52 provided at the end of the shaft portion 51 of the bolt 46 can be formed by plastic deformation processing of the bolt 46 itself, that is, by plastic deformation processing of the shaft portion 51 itself will be described.

  The nut stop portion 52 shown in FIG. 11 is formed by performing upsetting processing that is compression processing on the end portion of the shaft portion 51. In this upsetting process, the pressing die 59 and the receiving die 60 shown in FIG. 12 are used, and the small diameter hole portion 59A of the pressing die 59 is formed in the portion 51G corresponding to the small diameter portion 51D in FIG. When this portion 51G of the shaft portion 51 that is fitted and fixed at a fixed position is pressed in the axial direction by the pressing die 59, a part of the meat of the portion 51G bulges in the outer diameter direction. And this bulging meat is formed by a receiving die 60 that has been fitted to the outer periphery of the shaft portion 51 in advance and a large-diameter hole portion 59B formed in the pressure die 59 to form a bulging portion 58. This bulging portion 58 becomes a nut stop portion 58. Thereafter, the receiving die 60 is taken out from the shaft portion 51 by cutting or the like. In addition, the receiving die 60 may be inserted into and removed from the shaft 51 by forming a notch that reaches the hole into which the shaft 51 is inserted in the receiving die 60.

  Further, the bulging portion 58 may be formed in the portion 51G of the shaft portion 51 by using only the pressure die 59 without using the receiving die 60, and the shaft portion 51 may be formed by a pressure die in which the small diameter hole portion 59A is not provided. The bulging portion 58 may be formed in the portion 51G, and further, the portion of the shaft portion 51 is formed by a pressure mold having a small protruding portion protruding toward the shaft portion 51 instead of the small diameter hole portion 59A. The bulging part 58 may be formed in 51G.

  The nut stop portion 52 shown in FIG. 13 has a bifurcated portion that extends and extends to a portion 51H corresponding to the small diameter portion 51D of FIG. 5 in the shaft portion 51 to the opposite side to the tapered nut idle rotation portion 51C. 61 is formed. The bifurcated portion 61 is formed by the operation shown in FIG. That is, the forked part 61 is formed by forming the groove 62 in the part 51H and opening and deforming both sides of the groove 62 in the part 51H outward.

  Note that, by setting the opening angle of the opening deformation to 180 degrees, the protrusion 63 shown in FIG. 15 may be formed, and this protrusion may be used as the nut stop 52.

  16 is a crushing portion 64 formed by crushing a portion 51J corresponding to the small diameter portion 51D of FIG. 5 in the shaft portion 51. 16A is a side view of the crushing portion 64, and FIG. 16B is a front view of the crushing portion 64 as viewed from the end surface of the shaft portion 51. FIG. 17 shows an operation of forming the crushing portion 64 by crushing processing. FIG. 17A is a side sectional view of the shaft portion 51, and FIG. It is a front view of the said part 51J before the crushing process seen from the end surface.

  As shown in FIG. 17B, the flattened crushing portion 64 is formed at the end of the shaft portion 51 by crushing the portion 51 </ b> J from both diametrical sides of the shaft portion 51. It is formed.

  According to the embodiment of FIGS. 11 to 17 described above, the nut stop portion 52 is formed by a part of the shaft portion 51 of the bolt 46, and therefore a special member for providing the nut stop portion 52 on the bolt 46 is necessary. Therefore, the number of members can be reduced as compared with the embodiment using the stop member 53 and the two nuts 55 and 56.

  18 and 19 show an embodiment using a nut 78 as an alternative to the nut 48 screwed into the thread of the shaft portion of the bolt in the previous embodiments. As shown in FIG. 19, the nut 78 includes a polygonal portion 78A in which the socket member 49 of the electric tool shown in FIG. 2 for rotating the nut 78 is fitted to the outer periphery, and the polygonal portion 78A. It consists of a cylindrical part 78B formed continuously in the axial direction. Also in this embodiment, the bolt 46 in each of the embodiments described so far is used.

  In addition, a screw hole 78C that is screwed into the thread of the bolt 46 is formed inside the cylindrical portion 78B of the nut 78, and the inside of the polygonal portion 78A is continuous with the screw hole 78C. A large-diameter hole 78D having a diameter larger than that of the screw hole 78C is formed. The large-diameter hole 78D is a hole on the screw hole 78C side, a first hole 78E having a diameter larger than the screw hole 78C, and a hole on the opposite side of the screw hole 78C. The second hole 78F is larger in diameter than the hole 78E, and a step 78G is formed between the first hole 78E and the second hole 78F. The step 78G is a bolt This is a contact portion that contacts the nut stop portion 52 of 46.

  The rotation of the nut 78 relative to the bolt 46 is performed in the screw hole 78C formed in the cylindrical portion 78B that is on the base end portion 46A side of the bolt 46 with respect to the polygonal portion 78A. Thus, when the pressing force for the second clamping member 42 to rotate about the connecting pin 43 is applied to the second clamping member 42, the cylindrical portion 78B having a smaller diameter than the polygonal portion 78A is shown in FIG. Is inserted into the U-shaped cutout 45 formed at the other end 42C of the second holding member 42 (see also FIG. 18).

  In this embodiment, when the nut 78 is reversely rotated by the socket member 49 of the electric tool, the stepped portion 78G of the nut 78 comes into contact with the nut stop portion 52 of the bolt 46, so that the end portion 46B of the bolt 46 is removed. The nut 78 is prevented from falling off.

  Further, according to this embodiment, when the stepped portion 78G of the nut 78 contacts the nut stop portion 52 of the bolt 46, the tip end portion 46B of the bolt 46 protrudes from the nut 78 as shown in FIG. Not.

  In other words, according to this embodiment, the total length of the bolt 46 can be made sufficiently short. For this reason, when the single clamp 10 comprised by the 1st clamping member 41 and the 2nd clamping member 42 is boxed and conveyed to a store, a work site, etc., it is shown with the dashed-two dotted line of FIG. Thus, by rotating the bolt 46 about the connecting pin 47, the bolt 46 interferes with the connecting pin 43 etc. that rotatably connects the first holding member 41 and the second holding member 42. It becomes possible to store in these clamping members 41 and 42 without doing. Thereby, since the whole single clamp 10 can be reduced in size, the number of the single clamps 10 packed in one box can be increased.

  In the clamps of the respective embodiments described above, the number of first clamping members 41 and the number of second clamping members 42 is one, and the number of clamping parts for clamping the clamped member is one. The number of each of the first clamping member 41 and the second clamping member 42 is two, that is, two single clamps 10 are used. The case of the orthogonal clamp and the case of the universal clamp in which the number of sandwiching parts for sandwiching the sandwiched member is two will be described. In the following description, the same reference numerals are used for members that are the same as or have the same functions as those already described.

  The orthogonal clamp 20 shown in FIG. 20 includes a first clamping member 41 and a second clamping member 42 each having two pieces, and each first clamping member 41 is opposite to the second clamping member 42. These surfaces face each other and are connected at a right angle by a plurality of couplers 80 such as rivets. Further, among the first clamping members 41 and the second clamping members 42 each having two universal clamps 30 shown in FIG. 21, each of the first clamping members 41 is the second clamping member 42. The opposite surfaces face each other and are rotatably connected by a rotation center member 81.

  FIG. 22 shows a temporary scaffold 90 at a construction site where the orthogonal clamp 20 and the universal clamp 30 are used. The temporary scaffold 90 is constituted by a vertical member 91, a horizontal member 92, and a diagonal member 93 made of a pipe material that is a sandwiched member, and the orthogonal clamp 20 is used to connect the vertical member 91 and the horizontal member 92. The universal clamp 30 is used to connect the vertical member 91 and the diagonal member 93. The universal clamp 30 can also be used to connect the vertical member 91 and the horizontal member 92.

  As described above, the present invention can be applied to the orthogonal clamp 20 and the universal clamp 30 constituted by the two single clamps 10.

  FIG. 23 shows an embodiment of a single clamp 110 using a bolt 76 that is not provided with a nut idle rotating portion. FIG. 23 shows that the single clamp 110 is attached to the end member 2 of the barricade 1 of FIG. Indicates the case. In the following description, the same reference numerals are assigned to the same members and parts as those in the embodiments described above.

  The bolt 76 in the embodiment of FIG. 23 is provided with a hole through which the connecting pin 47 is inserted, like the bolt 46 described with reference to FIG. A nut stop provided at the tip of the shaft portion 51 on which the thread 48 is screwed and the end of the shaft portion 51 opposite to the ring-shaped portion 50. Part 52. In this embodiment, the thread of the shaft portion 51 is formed up to the nut stop portion 52, and therefore the above-described tapered nut idle rotation portion is not provided on the shaft portion 51.

  Also in this embodiment, when the nut 48 is reversely rotated by the socket member 49 of the electric tool in order to release the clamping of the coupled member 3 by the first clamping member 41 and the second clamping member 42, Even if the reverse rotation is excessively performed, the nut 48 abuts against the nut stop portion 52, so that the nut 48 can be prevented from falling off the bolt 46.

  Then, the above-mentioned electric tool is provided with a clutch, and when the driving force for rotating the nut 48 is excessively larger than a predetermined value, the driving force for the socket member 49 that rotates the nut 48 reversely. Is transmitted by the clutch, so that the nut 48 can be prevented from being strongly pressed against the nut stop portion 52.

  In this embodiment, the distance from the center of rotation of the ring-shaped portion 50 that is the base end of the bolt 46 to the tip of the bolt 46 where the nut stop portion 52 is provided is A, and the bolt The distance from the center of rotation of the ring-shaped portion 50 of 46 to the center of the connecting pin 43 that rotatably connects the first holding member 41 and the second holding member 42 is defined as B. When the radius of 43 is C, the inequality of A <B−C is established.

  According to this, before the single clamp 110 is attached to the end member 2 constituting the barricade 1 in FIG. 1, the bolt 46 is rotated when the bolt 46 is rotated around the rotation center portion of the ring-shaped portion 50. The bolt 46 can be housed inside the first clamping member 41 and the second clamping member 42 without the front end portion of the bolt 46 abutting against the connecting pin 43. Thereby, the whole single clamp 110 can be reduced in size, the number of the single clamps 110 accommodated in one box can be increased, and conveyance when a large number of single clamps 110 are packed and conveyed. Efficiency can be improved.

  It should be noted that setting the length of the bolt 76 so that the inequality of A <B−C is established can be easily performed because the shaft-shaped nut 51 is not provided with the tapered nut idle rotation portion as described above. Become.

  The single clamp 110 described above can also be used as a component of the orthogonal clamp 20 of FIG. 20 configured by two single clamps or the universal clamp 30 of FIG.

  FIGS. 24 to 26 show equipment used in a work site such as a building, which is configured by using one or a plurality of single clamps 110.

  The equipment shown in FIG. 24 is a root tie 120 that is bridged between two struts 94 and 95 that constitute a temporary scaffold or the like, and a first clamp 110 is sandwiched between both ends of a pipe body 120A of the root tie 120. The member 41 is connected, and the first and second holding members 41 and 42 of each single clamp 110 hold the support columns 94 and 95 that are the members to be held.

  25 is a bracket 130 used for arranging a member 140 such as a cloth board on which an operator rides on a temporary scaffold or the like. A main body 130A of the bracket 130 includes a horizontal first pipe 131 and the first pipe 131. The first holding member 41 of the single clamp 110 is connected to both ends of the first pipe 131 and the other end of the second pipe 132. Has been. Of the two struts 96 and 97 constituting the temporary scaffold or the like, the strut 96 that is a sandwiched member is sandwiched by the two single clamps 110 of the first and second pipes 131 and 132, and the sandwiched member is also the same. After the supporting column 97 is clamped by one single clamp 110 of the first pipe 131, a member 140 such as a cloth plate is disposed on the first pipe 131.

  26 is a catch clamp 150 used for attaching a pipe 99 constituting a temporary scaffold or the like to a structural member 98 such as a building. The first clamping member 41 of the single clamp 110 is attached to a main body 150A which is a bent sheet metal product of the catch clamp 150, and a C-shaped member 151 is freely rotatable by a pin 152 on the main body 150A. A bolt 153 to be rotated is screwed into one end of the C-shaped member 151 so as to be able to advance and retract toward the other end of the C-shaped member 151. After the structural material 98 is sandwiched between the front end of the bolt 153 and the other end of the C-shaped member 151, the work of sandwiching the pipe 99 with the single clamp 110 is performed.

  In the above-described equipment 120, 130, and 150, the single clamp 110 shown in FIG. 23 is used as a constituent element. However, as the constituent elements of these equipment 120, 130, and 150, the single clamp described in FIGS. A clamp 10 may be used.

  As can be understood from the above description of the equipment 120, 130, 150, the present invention can also be applied to a clamp for constituting a part of the equipment.

  INDUSTRIAL APPLICABILITY The present invention can be used for, for example, a clamp used for clamping a member used in various work sites including a construction site, a demolition site, and a civil engineering site.

It is a perspective view which shows the barricade in which the single clamp which concerns on one Embodiment of this invention is used. It is a side view which shows the single clamp of FIG. It is a front view which shows the single clamp of FIG. It is a figure which shows only a volt | bolt and the member arrange | positioned at this volt | bolt. It is a figure which shows the operation | work for attaching the stop member used as the nut stop part shown by FIG. 4 to the axial part of a volt | bolt. It is sectional drawing of the axial part of the volt | bolt after the attachment operation | work of a stop member. It is the figure which showed 1st another embodiment for forming in a bulging part in this axial part, in order to attach a stop member to the axial part of a volt | bolt. It is the figure which showed 2nd another embodiment for forming in a bulging part in this axial part, in order to attach a stop member to the axial part of a volt | bolt. It is a figure similar to FIG. 4 which shows embodiment which made the nut stop part the double nut by two nuts. It is a figure which shows the operation | work which arrange | positions the double nut of FIG. 9 to the axial part of a volt | bolt. It is a figure which shows 1st Embodiment which forms a nut stop part in the edge part of the axial part of a volt | bolt by plastic deformation. It is a figure which shows the operation | work which forms the nut stop part of 1st Embodiment of FIG. It is a figure which shows 2nd Embodiment which forms a nut stop part in the edge part of the axial part of a volt | bolt by plastic deformation. It is a figure which shows the operation | work which forms the nut stop part of 2nd Embodiment of FIG. It is a figure which shows 3rd Embodiment which forms a nut stop part in the edge part of the axial part of a volt | bolt by plastic deformation. It is a figure which shows 4th Embodiment which forms a nut stop part in the edge part of the axial part of a volt | bolt by plastic deformation, Comprising: (A) is a side view which shows the nut stop part of this 4th Embodiment, (B) is a front view showing the nut stop portion of the fourth embodiment viewed from the end face of the shaft portion of the bolt. It is a figure which shows the operation | work which forms the nut stop part of 4th Embodiment of FIG. 16, Comprising: (A) is a sectional side view of the axial part of a volt | bolt, (B) is the axial part of a volt | bolt. It is the front view seen from the end surface of this axial part, before the nut stop part of 4 embodiment is formed. It is a figure similar to FIG. 2 which shows another embodiment about the nut screwed together by the thread of a bolt. It is a figure similar to FIG. 4 which shows the nut of FIG. It is a perspective view which shows the orthogonal clamp comprised using two single clamps of FIG. It is a perspective view which shows the universal clamp comprised using two single clamps of FIG. It is a perspective view which shows the temporary scaffold in which an orthogonal clamp and a universal clamp are used. It is a figure similar to FIG. 2 which shows embodiment of the single clamp using the volt | bolt in which the nut idle | rotation part is not provided. It is a figure which shows the root binding in which the single clamp of FIG. 23 is used as a component. It is a figure which shows the bracket in which the single clamp of FIG. 23 is used as a component. It is a figure which shows the catch clamp in which the single clamp of FIG. 23 is used as a component.

Explanation of symbols

3, 91, 92, 93, 94, 95, 96, 97, 99 Clamped member 10, 110 Single clamp 20 Orthogonal clamp 30 Universal clamp 41 First clamping member 41A One end 41C The other end 42 Second clamping Member 42A One end 42C The other end 43 Connecting pin 45 as a connecting member 45 U-shaped notch 46,76 Bolt 46A Base end 46B Tip 48 Nut 51C Nut idler 52 Nut stop 53 Stop member 57 Double nut 78 Nut 78A Polygon part 78B Cylindrical part 78C Screw hole 78D Large diameter hole 78G Step part which is a contact part

Claims (11)

A first and second holding member; a connecting member that rotatably connects one end of each of the first holding member and the second holding member; and the other end of the first holding member. A bolt having a base end rotatably connected thereto, a nut screwed into the bolt, and a U-shaped notch formed at the other end of the second clamping member, The first clamping member and the second clamping member are rotated about the connecting member by the pressing action of the nut rotated with respect to the bolt inserted into the U-shaped notch, and the second clamping member. In the clamp that clamps the clamped member with
The clamp characterized by the nut stop part for preventing the drop-off | omission of the said nut from the said bolt in the front-end | tip part on the opposite side to the said base end part in the said volt | bolt.   2. The clamp according to claim 1, wherein a portion of the bolt adjacent to the nut stop portion that is closer to the base end portion than the nut stop portion is rotated idly. Clamp characterized by being a nut empty rotating part.   In the clamp according to claim 2, the nut idle rotating portion has a tapered shape that is tapered toward the distal end portion, and the end of the tapered nut idle rotating portion on the base end portion side includes: Clamp characterized in that a thread having continuity with the thread of the bolt is provided.   4. The clamp according to claim 3, wherein the tapered nut idle rotating portion is formed by a process of eliminating a part of the thread formed on the tapered nut idle rotating portion while leaving the continuity. Clamp characterized by being.   The clamp according to claim 1, wherein a thread formed on the bolt for screwing the nut is formed up to the nut stop portion.   The clamp according to any one of claims 1 to 5, wherein the nut stop portion is formed by a stop member attached to the tip portion.   The clamp according to any one of claims 1 to 5, wherein the nut stop portion is formed by plastic deformation of the tip portion.   The clamp according to any one of claims 1 to 5, wherein the nut stop portion is formed by a double nut including two nuts.   The clamp according to claim 8, wherein the screw thread formed in the bolt is used as the screw thread in which the two nuts are screwed together.   The clamp according to any one of claims 1 to 9, wherein the nut is a polygonal portion in which a tool for rotating the nut is fitted to the outer periphery, and the base end portion of the bolt is more than the polygonal portion. A screw hole that is screwed into the screw thread of the bolt, and is continuous with the screw hole inside the polygonal part. In addition, a large-diameter hole having a diameter larger than that of the screw hole is formed, and the large-diameter hole is provided with a contact portion that contacts the nut stop portion and prevents the nut from falling off the bolt. A clamp characterized by that.   The clamp according to any one of claims 1 to 10, wherein a distance from a rotation center portion of the base end portion of the bolt to the tip end portion of the bolt is A, and the base end portion of the bolt is rotated. A clamp characterized in that an inequality of A <BC is established, where B is the distance from the center to the center of the connecting member and C is the radius of the connecting member.