TW201723325A - Fastener and fastening mechanism - Google Patents

Abstract

A fastener which can be easily fastened and removed using a commercially-available tool, without using a fastening tool. A fastener (1) for fastening workpieces (51, 52) formed with attachment holes (53, 54) comprises a bolt (10) having a bolt head (11) and a shaft (12) which is contiguous to the bolt head and is formed with a male thread (13); and an outer nut (20) which is formed with an outer nut aperture (26) having a hexagonal cross section; and a bulbous sleeve (30) which is cylindrical and is formed with a sleeve aperture (36); and an inner nut (40) having cylindrical portions (41, 42) which have an inner nut aperture (46) formed with a female thread (43) extending in the axial direction, and a nut head (44.) The male thread of the bolt threadably engages in the female thread of the inner nut. The cylindrical portions of the inner nut are supported in the outer nut aperture so that they are slidable in the axial direction relative to the outer nut, but cannot rotate. The bulbous sleeve is held between the outer nut and the step (45) of the nut head of the inner nut.

Description

Tie and tie structure

The present invention relates to a tie and tie structure. In particular, the present invention relates to a tie member and a tie structure capable of attaching a tie member from one side of a member to be mounted by a power tool and capable of removing the attached tie member from one side.

A blind rivet is widely known in the industry and has the following components: a hollow metal rivet body including a rivet head at one end of the sleeve and the sleeve, and a metal portion extending from the through hole of the rivet body. Mandrel. Blind rivets have the advantage of being able to combine a plurality of mounted components with only one side of the work. The rivet body of the blind rivet is formed with a rivet head at one end and has a cylindrical hollow sleeve extending from the rivet head. The mandrel of the blind rivet has a head having a larger diameter at the end than the inner diameter of the sleeve, and an elongated shaft portion extending from the head. The mandrel is assembled in such a manner that the head of the mandrel is disposed adjacent to one end of the sleeve opposite to the head of the rivet, the shaft portion is inserted into the through hole of the rivet body, and the shaft portion of the mandrel is self-rivet The head extends out. The assembled blind rivet is inserted into the hole of the member to be mounted such as a panel with the head of the mandrel as the front end, and the rivet head abuts against the hole of the member to be mounted. In this state, if the rivet head is held by the tying tool and the shaft portion of the mandrel is held and pulled strongly from the head side of the rivet, one end of the sleeve of the rivet body is expanded in diameter. The deformation occurs, and the mandrel is broken at the small breakable portion of the shaft portion, and the member to be mounted can be tied between the rivet head and the enlarged diameter enlarged portion of the sleeve. Since the blind blind rivet is used to pull the shaft of the mandrel with a strong force to break the small breakable portion, a special tying tool is required, and the load at the time of the break is not constant and the deformation of the mounted member occurs. situation. Therefore, it is also beginning to use a tie which does not require the use of a tying tool to break the mandrel. Such a tying member uses a rivet body having a bolt having a male thread, a rivet head, and a sleeve formed with a female thread engaged with a male thread of the bolt, and the male thread is gradually engaged by rotating the bolt The female thread of the sleeve is pulled to the rivet head side to expand the diameter, so that the mounted member is clamped between the rivet head and the expanded sleeve. Patent Document 1 discloses a blind bolt (tie member) including a structural member (rivet body), a bolt member (bolt), and a diameter-expanding member. The structural member has a cylindrical portion, a head portion at one end of the cylindrical portion, and a bolt hole penetrating in the axial direction. The bolt member is insertable into the hole for the bolt, and has a shaft portion formed with a male screw and a head portion at one end of the shaft portion. The diameter-expanding member is formed with a female thread that is screwed to the male screw, and one end portion of the axial direction can infiltrate the hole for the bolt, and the other end portion has a larger inner diameter than the hole for the bolt. In order to attach the blind bolt of Patent Document 1, the shaft portion of the bolt member is inserted into the bolt hole from the side of the head portion of the structural member, and the shaft portion is exposed to the shaft portion exposed at the other end of the self-structure member. When the bolt member is rotated, the diameter-expanding member intrudes into the hole for the bolt while pressing the expanded cylindrical portion. The plate (the member to be mounted) is tied between the enlarged cylindrical portion and the head of the structural member. The blind bolt of Patent Document 1 does not require the use of a tying tool, and a blind bolt can be mounted on one side using a power tool. After the plate is tied, the bolt member and the diameter-expanding member can be removed by rotating the bolt member in reverse, however, the plate is sandwiched between the head of the structural member and the enlarged cylindrical portion. Unable to remove the problem. Patent Document 2 discloses a blind rivet including a bolt, a collar, a buckling nut (rivet body), and a washer for attaching the mounting member to the member to be mounted. The bolt has a flange having a large diameter, a cylindrical portion adjacent to the flange, and a male thread portion adjacent to the cylindrical portion. The collar is formed with a circular hole through which the cylindrical portion passes, and a polygonal hole. The buckling nut has a polygonal head portion held in the polygonal hole, a tubular portion that is adjacent to the polygonal head portion and capable of expanding the diameter, and a female thread portion that is adjacent to the tubular portion and engageable with the male screw portion of the bolt. The washer is received inside the polygonal hole of the collar around the cylindrical portion of the bolt. In order to install the blind rivet of Patent Document 2, the male thread portion of the bolt is inserted into the cylindrical hole of the sleeve ring and the center hole of the washer, and the buckling nut is inserted. The male screw portion is engaged with the female screw portion of the buckling nut in advance by rotating the bolt. The blind rivet is inserted into the mounting hole of the mounted member, and the bolt is rotated, so that the male thread portion is further engaged with the female thread portion of the buckling nut. The tubular portion of the buckling nut is expanded to form an enlarged diameter portion. The mounted member is fixed between the polygonal head portion of the buckling nut and the enlarged diameter portion. Further, when the bolt is rotated, the washer is sheared, and the attachment member is attached between the end portion of the collar and the member to be mounted. The blind rivet of Patent Document 2 can be used to mount a blind bolt on one side using a power tool without using a tying tool. After the mounting member is mounted, if the bolt is reversely rotated, the mounting member can be removed. However, the mounted member cannot be removed due to being sandwiched between the polygonal head portion of the buckling nut and the enlarged diameter portion. The blind rivet of Patent Document 2 is the same as Patent Document 1, and there is a problem that the blind rivet cannot be completely removed from the member to be mounted. Moreover, the mounting hole of the mounting member needs to be set to be larger than the mounting hole of the mounted member. Patent Document 3 discloses a blind bolt tie having a bolt, a sleeve (rivet body), a nut, and a drive nut. The blind bolt tying member is extended by bolts through the driving nut and the sleeve and assembled in a manner of screwing with the nut. The sleeve is pressed by the driving nut, so that the male thread of the bolt is engaged with the female thread of the nut and pulled to the head side of the sleeve. The sleeve is expanded in diameter to form an enlarged diameter portion, whereby the workpiece (the member to be mounted) is tied. If the bolt is further rotated, the head of the bolt breaks at the fracture groove, and the head of the bolt and the drive nut are removed. When the blind bolt binding member of Patent Document 3 is attached, since the workpiece is clamped between the head portion of the sleeve and the enlarged diameter portion, the blind bolt tie member cannot be removed from the workpiece. The binding members of Patent Documents 1 to 3 can be formed by expanding the bolts by using a power tool for bolting with a commercially available bolting tool while using a tying tool without breaking the mandrel. The diameter portion is thus mounted to the member to be mounted. However, after being attached to the mounted member, the tie member cannot be removed from the mounted member. For this reason, it is desired to obtain a tie which can be completely removed by one side work after the mounted member is mounted. [PATENT DOCUMENT] [Patent Document 1] Japanese Laid-Open Patent Publication No. 2012-249850 (Patent Document No. JP-A-2013-249850)

[Problem to be Solved by the Invention] It is an object of the present invention to provide a system capable of completely removing a work on one side after mounting a member to be mounted on one side using a commercially available power tool. Conclusion. [Technical means for solving the problem] In order to achieve the object, the tie member of the present invention has four parts of a bolt, an outer nut, a bulb-shaped sleeve, and an inner nut. The inner nut can slide but not rotate relative to the outer nut. When the male thread of the bolt and the female thread of the inner nut are gradually screwed, the bulb-shaped sleeve is pressed between the outer nut and the nut head of the inner nut to form an enlarged diameter portion. The mounted member is tied between the outer nut and the enlarged diameter portion and is tied. A tie member according to a first aspect of the present invention is characterized in that it is used for tying a member to be mounted with a mounting hole, and includes: a bolt having a bolt head and adjacent to the bolt head and formed a shaft portion having a male thread; an outer nut having a nut hole extending in the axial direction and a polygonal outer surface; a bulb-shaped sleeve which is cylindrical and formed with a sleeve hole; and a screw a cap having a cylindrical portion having an inner nut hole extending in the axial direction and having a female thread formed inside the inner nut hole, and a nut head formed at one end of the cylindrical portion; and Inserting the shaft portion of the bolt into the inner nut hole of the inner nut, one of the male threads of the bolt is screwed with the female thread of the inner nut; the cylindrical portion of the inner nut is located at the bulb shape In the sleeve hole of the sleeve, the front end portion of the cylindrical portion is located in the nut hole outside the outer nut; the front end portion of the cylindrical portion of the inner nut can be along the outer nut with respect to the outer nut Axial sliding but not rotatable is supported In the outer nut hole; the bulbous sleeve is held on one side of the outer nut of the inner nut and the nut of the inner nut adjacent to the nut head Between the steps. The tie member has four parts of a bolt, an outer nut, a bulb-shaped sleeve, and an inner nut, and constitutes a knot assembly in which four parts are combined. If the tie assembly is inserted into the mounting hole of the mounted member from one side, and the male thread of the bolt is gradually screwed with the female thread of the inner nut, between the outer nut and the nut head of the inner nut The bulb-shaped sleeve is pressed from both ends to expand the diameter, so that the mounted member can be tied. Thereby, it is possible to easily attach the mounted member with the fastener using one of the commercially available electric tools without using a dedicated tying tool. Moreover, the tied member to be attached can be detached by one side work using the same power tool. Preferably, the outer nut hole of the outer nut has a polygonal cross section, and the outer peripheral surface of the cylindrical portion of the inner nut is formed by a number equal to the number of the polygons of the outer nut hole. A sliding plane extending at equal intervals in the axial direction, the sliding plane abutting against the inner surface of the polygon of the outer nut hole. The nut hole outside the outer nut has a polygonal cross section, and if the outer peripheral surface of the inner nut is formed with a sliding plane suitable for the inner surface of the outer nut hole, the inner nut can be supported to It slides axially relative to the outer nut but does not rotate. Preferably, the outer nut hole has a hexagonal shape, and the number of the sliding planes is 6. Preferably, the outer nut hole of the outer nut is formed with a plurality of concave portions extending in the axial direction, and a peripheral surface of the cylindrical portion of the inner nut is formed to be engaged with the outer nut hole. a plurality of convex portions of the concave portion extending in the axial direction. The nut hole is formed with a plurality of recesses extending in the axial direction outside the outer nut, and a plurality of recesses extending in the axial direction suitable for the outer nut hole are formed on the outer peripheral surface of the cylindrical portion of the inner nut The projections are capable of supporting the inner nut to slide axially relative to the outer nut without rotation. Preferably, the outer nut hole of the outer nut is formed with a key groove extending in the axial direction, and the outer peripheral surface of the cylindrical portion of the inner nut is formed with the key groove that is engaged with the outer nut hole. And the axially extending key that can slide in the axial direction. Preferably, the outer diameter and the inner diameter of the axial center portion of the bulb-shaped sleeve are larger than the outer diameter and the inner diameter of the axial end portion, respectively, and are made of soft metal, and the axial center portion is easily expanded. path. When the bulb-shaped sleeve is made of a soft metal, if the central portion of the axial direction expands in the outer diameter direction, the axial center portion can be easily expanded in diameter, and the diameter-enlarged portion can be enlarged, and the suitable member to be mounted can be enlarged. The range of plate thickness. Preferably, the bulb-shaped sleeve is made of a soft metal, and the wall thickness at the central portion in the axial direction is thinner than the thickness of the axial end portion, and is made of soft metal, and the axial center portion is easily expanded in diameter. When the thickness of the axial center portion of the bulb-shaped sleeve is thinner than the thickness of the axial end portion, the axial center portion can be easily expanded in diameter. A tying structure according to a second aspect of the present invention is characterized in that the tying member is used to fasten a member to be mounted with a mounting hole, and the tying member is provided with a bolt having a bolt head and abutting a shaft portion of the bolt head formed with a male thread; an outer nut having a nut hole extending in the axial direction and a surface having a polygonal cross section, and the bolt head of the bolt and the foregoing Between the surfaces of the member to be mounted; a bulb-shaped sleeve which is cylindrical and formed with a sleeve hole; and an inner nut which is provided with an inner nut hole extending in the axial direction and in the aforementioned inner nut hole a cylindrical portion having a female thread and a nut head formed at one end of the cylindrical portion; and the shaft portion of the bolt is inserted into the inner nut hole of the inner nut, and the bolt is The male thread is screwed with the female thread of the inner nut; the cylindrical portion of the inner nut is located in the sleeve hole of the bulb-shaped sleeve and the outer nut hole of the outer nut; The aforementioned cylindrical portion of the cap is opposite to The outer nut is supported in the outer nut hole in a manner that the outer nut is not rotatable; the bulbous sleeve is held in the outer periphery of the cylindrical portion of the inner nut in the mounting hole of the inner member One surface of the outer nut and the nut step of the inner nut adjacent to the nut head, and the enlarged diameter portion of the bulbous sleeve is present adjacent to the surface of the mounted member, thereby The mounted member is tied between one surface of the outer nut and the enlarged diameter portion. Preferably, the outer nut hole of the outer nut has a polygonal cross section, and the outer peripheral surface of the cylindrical portion of the inner nut is formed by a number equal to the number of the polygons of the outer nut hole. A sliding plane extending at equal intervals in the axial direction, the sliding plane abutting against the inner surface of the polygon of the outer nut hole. [Effects of the Invention] According to the present invention, it is possible to provide a tie which can be completely removed by one side work after the installation of the member to be mounted is performed by one side of the work using a commercially available power tool.

(Embodiment) Hereinafter, a tie 1 according to an embodiment of the present invention will be described with reference to the drawings. The tie member 1 is provided with a bolt 10, an outer nut 20, a bulb-shaped sleeve 30, and an inner nut 40. In the present specification, the bolt 10, the outer nut 20, the bulb-shaped sleeve 30, and the inner nut 40 are assembled, and the assembly before the fastening is referred to as a fastener assembly 1a. Fig. 1 is a left side view of the tie assembly 1a of the embodiment of the present invention. Fig. 2 is a front cross-sectional view showing a portion of the tie assembly 1a. Fig. 3 is a right side view of the tie assembly 1a. Figure 4 is an exploded perspective view of the tie member 1. Hereinafter, the bolt 10, the outer nut 20, the bulb-shaped sleeve 30, and the inner nut 40 constituting the tie member 1 will be sequentially described. The bolt 10 is a commercially available bolt, and the bolt 10 is not shown. As shown in FIG. 4, the bolt 10 has a bolt head portion 11 having a short hexagonal column shape, and a cylindrical shaft portion 12 extending in the axial direction from the bolt head portion 11. A male screw 13 is formed on the outer peripheral surface of the shaft portion 12. The bolt 10 is formed of a hard metal such as steel or stainless steel. The cross section of the bolt head 11 may be a shape that can rotate the bolt head by a tool, even if it is not a hexagon. For example, the profile can be quadrilateral. Alternatively, a cross-shaped groove may be formed in the head of the bolt to be rotatable by a screwdriver or the like. Figure 5 is a left side view of the nut 20 outside the tie member 1 of the embodiment. Figure 6 is a front cross-sectional view of a portion of the outer nut 20. The outer nut 20 has a hexagonal column shape similar to that of a general hexagonal nut, and has a first surface 21, a second surface 22, and a hexagonal outer surface 23. A nut hole 26 having a hexagonal cross section is formed at an axial center portion of the outer nut 20. The distance between the opposite sides of the hexagon of the cross section of the outer nut hole 26 is d26. The distance between the apexes of the hexagons of the cross section of the outer nut hole 26 is D26. The distance d26 between the opposite sides of the outer nut hole 26 is larger than the outer diameter of the shaft portion 12 of the bolt 10, and the shaft portion 12 of the bolt 10 can be inserted into the outer nut hole 26. The nut sliding portion 41 of the inner nut 40 can be inserted into the outer nut hole 26 as will be described later. As will be described later, when the nut sliding portion 41 of the inner nut 40 has another shape, the outer nut hole 26 has a shape that matches the shape of the nut sliding portion 41. The outer nut 20 is formed of a hard metal. Although the outer nut 20 has a hexagonal column shape, it may be a shape that can support the outer nut 20 so as not to rotate and rotate the bolt 10 even if it is not a hexagonal column shape. For example, a quadrangular prism shape or other shapes may also be employed. Figure 7 is a left side view of the bulbous sleeve 30 of the tie member 1 of the embodiment. The so-called "balloon sleeve" means a sleeve that expands. Figure 8 is a cross-sectional view of the bulbous sleeve 30. The bulb-shaped sleeve 30 is cylindrical in its entirety. The bulb-shaped sleeve 30 has a first cylindrical portion 31 having an outer diameter D31 and an inner diameter d31, and a second cylindrical portion 32 having an outer diameter and an inner diameter slightly larger than the first cylindrical portion 31; The cylindrical portion 33 has an outer diameter and an inner diameter which are substantially equal to the first cylindrical portion 31. A first tapered portion 34 including a taper is provided between the first cylindrical portion 31 and the second cylindrical portion 32. A second tapered portion 35 including a taper is provided between the second cylindrical portion 32 and the third cylindrical portion 33. The thicknesses of the first cylindrical portion 31, the second cylindrical portion 32, the third cylindrical portion 33, the first tapered portion 34, and the second tapered portion 35 are substantially the same. A sleeve hole 36 is formed from an end portion of the first cylindrical portion 31 to an end portion of the third cylindrical portion 33. The inner diameter of the second cylindrical portion 32 is slightly larger than the inner diameter d31 of the first cylindrical portion 31. The inner diameter of the third cylindrical portion 33 is substantially the same as the inner diameter d31 of the first cylindrical portion 31. When the bulb-shaped sleeve 30 is pressed from both end portions, the first tapered portion 34 and the second tapered portion 35 are easily plastically deformed, and the second cylindrical portion 32 is expanded in diameter. Alternatively, the thickness of the first tapered portion 34, the second cylindrical portion 32, and the second tapered portion 35 may be reduced, and the second cylindrical portion 32 may be easily expanded in diameter. The inner diameter d31 of the first cylindrical portion 31 is substantially equal to the distance d26 between the outer faces of the nut holes 26 outside the outer nut 20. The first cylindrical portion 31 cannot enter the nut hole 26 other than the outer nut 20, and the end portion of the first cylindrical portion 31 abuts against the second surface 22 of the outer nut 20 and stops. As will be described later, in a state in which the tie member 1 is fastened, the bulb-shaped sleeve 30 is pressed by the inner nut 40 and the outer nut 20 in the axial direction, and the second cylindrical portion 32 is expanded to become the enlarged diameter portion 32d. The member to be attached 51 and 52 are interposed between the enlarged diameter portion 32d and the second surface 22 of the outer nut 20 to be tied thereto. The inner diameter and the outer diameter of the second cylindrical portion 32 of the bulb-shaped sleeve 30 are smaller than the inner diameter d31 and the outer diameter D31 of the first cylindrical portion 31 (the inner diameter d33 and the outer diameter D33 of the third cylindrical portion 33). Further, the second cylindrical portion 32 can be plastically deformed and expanded in diameter. Further, the bulb sleeve 30 is formed using a soft metal. Since the axial length of the first cylindrical portion 31 is reduced by the pressing of the first cylindrical portion 31 in the axial direction, the thickness of the first cylindrical portion 31 is slightly longer than the total thickness of the attached members 51 and 52, and the first tapered portion 34 is slightly longer. Plastic deformation occurs, and the second cylindrical portion 32 becomes the enlarged diameter portion 32d. Figure 9 is a left side view of the inner nut 40 of the tie member 1 of the embodiment. Figure 10 is a front elevational view, partially in section, of the inner nut 40. The inner nut 40 has a cylindrical portion that is cylindrical in shape as a whole, and a nut head portion 44 that is one end of the cylindrical portion. The cylindrical portion of the inner nut 40 has a nut-shaped sliding portion 41 having an end portion and a cylindrical nut portion 42 adjacent to the nut sliding portion 41. The nut sliding portion 41 has a cylindrical shape, and six sliding planes 41a extending in the axial direction are formed at equal intervals on the outer peripheral surface. The outer diameter D41 of the nut sliding portion 41 is slightly larger than the distance d26 between the opposing faces of the nut holes 26 outside the outer nut 20. The distance E41 between the opposing sliding planes 41a of the nut sliding portion 41 is smaller than the outer diameter D41 of the nut sliding portion 41. The distance d26 between the face of the E41 and the outer nut hole 26 is equal to or slightly smaller. When the angular position of the sliding plane 41a is aligned with the angular position of the opposing face of the outer nut hole 26, the nut sliding portion 41 can be inserted into the nut hole 26 outside the hexagonal outer nut 20. Although the nut sliding portion 41 can slide in the axial direction on the inner surface of the outer nut hole 26, it cannot rotate in the outer nut hole 26. The inner diameter d41 of the nut hole 46 in the nut sliding portion 41 is slightly larger than the outer diameter of the shaft portion 12 of the bolt 10, and the shaft portion 12 of the bolt 10 can be inserted into the inner nut hole 46. The cylindrical portion of the inner nut 40 has a cylindrical nut cylindrical portion 42 adjacent to the nut sliding portion 41. The nut sliding portion 41 and the outer diameter of the nut cylindrical portion 42 are both D41. An inner nut hole 46 is formed in the nut sliding portion 41 and the nut cylindrical portion 42. In the inner nut hole 46, a female screw 43 is formed on the inner surface of the nut cylindrical portion 42. The shaft portion 12 of the bolt 10 can be inserted into the inner nut hole 46 from the side of the nut sliding portion 41, and the male thread 13 of the bolt 10 can be screwed with the female thread 43 of the inner nut hole 46. Further, the nut sliding portion 41 is formed with a portion of the sliding plane 41a. The axial position of the female thread 43 of the nut cylindrical portion 42 may not coincide with the axial position at which the sliding plane 41a ends, and may be deviated therefrom. As described above, the nut sliding portion 41 and the nut cylindrical portion 42 are collectively referred to as a cylindrical portion. A nut head 44 is formed adjacent to the nut cylindrical portion 42. The nut head 44 has an outer diameter D44 that is larger than the outer shape D42 of the nut cylindrical portion 42. A nut step 45 is formed between the nut head portion 44 and the nut cylindrical portion 42. The inner nut hole 46 is a blind hole that ends at the nut head 44. The inner nut hole 46 can also be a through hole. The outer diameter D41 of the nut sliding portion 41 and the nut cylindrical portion 42 is substantially equal to or slightly smaller than the inner diameter d31 of the first cylindrical portion 31 of the bulb-shaped sleeve 30 and the inner diameter d33 of the third cylindrical portion 33. The nut sliding portion 41 can be inserted into the first cylindrical portion 31, the second cylindrical portion 32, and the third cylindrical portion 33 of the bulb-shaped sleeve 30. The outer diameter D44 of the nut head portion 44 is substantially equal to or slightly larger than the outer diameter D33 of the third cylindrical portion 33. The outer diameter D44 of the nut head portion 44 is the size at which the end portion of the third cylindrical portion 33 can be pressed by the nut step portion 45. When the nut sliding portion 41 of the inner nut 40 and the nut cylindrical portion 42 are gradually inserted from the third cylindrical portion 33 side of the bulb-shaped sleeve 30, it is adjacent to the nut head portion 44 of the inner nut 40. The nut step portion 45 comes into contact with the end portion of the third cylindrical portion 33 and stops. The axial length of the cylindrical portion in which the nut sliding portion 41 of the inner nut 40 and the nut cylindrical portion 42 are combined is slightly longer than the entire length of the bulb-shaped sleeve 30. When the nut sliding portion 41 of the inner nut 40 is inserted from the side of the third cylindrical portion 33 of the bulb-shaped sleeve 30, the nut sliding portion 41 of the inner nut 40 is self-contained from the bulb-shaped sleeve 30. The end of the first cylindrical portion 31 is slightly exposed. The inner nut 40 is formed using a hard metal. Returning to FIGS. 1 to 3, the assembly of the bolt 10, the outer nut 20, the bulb-shaped sleeve 30, and the inner nut 40 as constituent components of the fastener 1 will be described. The right side of Figure 2 is the blind side and the left side is the working side. The work of tying the tie pieces is performed from the work side on the left side. When the inner nut 40 is gradually inserted from the side of the third cylindrical portion 33 of the bulb-shaped sleeve 30 with the nut sliding portion 41 as the front end, the nut step portion 45 of the inner nut 40 abuts against the bulb-shaped sleeve. The end of the third cylindrical portion 33 of the cylinder 30 is stopped. At this time, the nut sliding portion 41 of the inner nut 40 is slightly exposed from the side of the first cylindrical portion 31 of the bulb-shaped sleeve 30. The angular position of the sliding plane 41a of the nut sliding portion 41 of the inner nut 40 is aligned with the angular position of the outer surface of the outer nut 20 outside the nut hole 26. When the outer nut 20 is gradually slid from the outer circumference of the nut sliding portion 41 of the inner nut 40, the end portion of the first cylindrical portion 31 of the bulb-shaped sleeve 30 abuts against the outer nut 20 2 faces 22, while the outer nut 20 stops. The outer nut 20 is held so as not to rotate on the outer circumference of the nut sliding portion 41 of the inner nut 40. The bolt 10 is inserted into the assembly of the outer nut 20, the bulb sleeve 30, and the inner nut 40 from the side of the outer nut 20. The male thread 13 of the shaft portion 12 of the bolt 10 is screwed with the female thread 43 of the inner nut hole 46 of the inner nut 40. The surface of the bolt head 11 abuts against the first surface 21 of the outer nut 20. The ball-shaped sleeve 30 is interposed between the second surface 22 of the outer nut 20 and the nut step portion 45 of the inner nut 40. In this manner, the bolt 10, the outer nut 20, the bulb-shaped sleeve 30, and the inner nut 40 are assembled to form the fastener assembly 1a. The operation of tying the fastener assembly 1a will be described with reference to Figs. 11 to 13 . Fig. 11 is a perspective view showing a state in which the tie member 1 has been attached to the attachment holes 53, 54 of the mounted members 51, 52. Figure 12 is a perspective view from another direction. Fig. 13 is a front view showing a part of a state in which the tie member 1 has been tied. The mounted members 51 and 52 are overlapped. The inner diameter of the mounting hole 53 of the member to be mounted 51 and the inner diameter of the mounting hole 54 of the member to be mounted 52 are larger than the nut head portion 44 of the inner nut 40 and the second cylindrical portion 32 of the bulbous sleeve 30. The inner nut 40 and the bulb-shaped sleeve 30 can be inserted into the mounting holes 53, 54 from the left side. The outer diameter of the outer nut 20 is larger than the inner diameter of the mounting holes 53, 54 of the mounted members 51, 52. The coupling member 1a is inserted into the mounting holes 53, 54 of the mounted members 51, 52 with the nut head 44 as the front end. The second surface 22 of the outer nut 20 abuts against the surface around the mounting hole 54 of the mounting member 52 and stops. When the outer nut 20 is held in a non-rotating manner and the bolt 10 is rotated, the male thread 13 of the bolt 10 and the female thread 43 of the inner nut 40 are gradually screwed together. Both ends of the bulb-shaped sleeve 30 are pressed by the second surface 22 of the outer nut 20 and the nut step 45 of the nut head 44. By the pressing force, the second cylindrical portion 32 of the bulb-shaped sleeve 30 is expanded in diameter to become the enlarged diameter portion 32d, and abuts against the surface around the mounting hole 53 of the member to be mounted 51. The nut sliding portion 41 of the inner nut 40 slides so as not to rotate inside the nut hole 26 outside the outer nut 20. The inner nut 40 does not rotate relative to the outer nut 20. When it becomes a specific axial force, the screw 10 is screwed in and the tie is completed. The axial force of the tie member 1 can be adjusted by adjusting the fastening force of the bolt 10. Thus, the tie member 1 is tied to the mounted members 51, 52. Next, the detachment of the tying member 1 will be described with reference to Figs. Referring to Fig. 14, when the bolt 10 of the fastener 1 is rotated in the reverse direction, the screwing of the female screw 43 of the inner nut 40 and the male thread 13 of the bolt 10 is released, and the bolt 10 can be pulled out. When the bolt 10 is removed, the outer nut 20 can be pulled out from the nut sliding portion 41 of the inner nut 40 without rotating. Referring to Fig. 15, when the bulb-shaped sleeve 30 and the inner nut 40 are pushed out from the attachment holes 53, 54 of the mounted members 51, 52, the mounted members 51 and 52 can be removed. Since the bulb-shaped sleeve 30 and the inner nut 40 fall to the blind side, they can be recovered from below. Further, the detached bolt 10 and the outer nut 20 can be reused and attached to the members to be mounted 51 and 52 again. According to an embodiment of the present invention, it is possible to tie the mounted member with one side of the work using the power tool for the previous bolting. Moreover, the member to be mounted can be removed by one side work. In the embodiment, the nut hole 26 of the outer nut 20 is set to a hexagonal shape, and the sliding plane 41a of the inner nut 40 is set to six. However, it is not limited to this embodiment. As long as the inner nut shape of the outer nut and the outer nut hole shape can be engaged with each other and can slide in the axial direction, the shape cannot be rotated. For example, it is feasible to set the nut hole outside the outer nut to a quadrangle, and the sliding plane of the inner nut is set to four. Alternatively, it is possible that a plurality of concave recesses extending in the axial direction are formed outside the outer nut, and a plurality of concave recesses extending in the axial direction are formed on the outer peripheral surface of the nut sliding portion of the inner nut. a convex part. By engaging the convex portion with the concave portion, the inner nut can be slid without rotating relative to the outer nut. Alternatively, it is feasible that the nut hole outside the outer nut forms a concave key groove extending in the axial direction, and the nut sliding portion of the inner nut forms a convex key extending in the axial direction of the engagement key groove. By engaging the key in the keyway, the inner nut can be slid relative to the outer nut without rotation.

1‧‧‧ tied pieces
1a‧‧‧Connected parts assembly
10‧‧‧ bolt
11‧‧‧Bolt head
12‧‧‧Axis
13‧‧‧ male thread
20‧‧‧ outer nut
21‧‧‧ first side
22‧‧‧2nd
23‧‧‧ outer surface
26‧‧‧Outer nut hole
30‧‧‧Ball-shaped sleeve
31‧‧‧1st cylindrical part
32‧‧‧2nd cylindrical part
32d‧‧‧Extended section
33‧‧‧3rd cylindrical part
34‧‧‧1st tapered part
35‧‧‧2nd tapered part
36‧‧‧Sleeve hole
40‧‧‧ inner nut
41‧‧‧ Nut sliding part
41a‧‧‧Sliding plane
42‧‧‧Cylinder cylindrical part
43‧‧‧Female thread
44‧‧‧ Nut head
45‧‧‧ Nuts
46‧‧‧ inner nut hole
51‧‧‧Installed components
52‧‧‧Installed components
53‧‧‧Installation holes
54‧‧‧ mounting holes
D26‧‧‧Distance
D31‧‧‧ OD
D33‧‧‧ OD
D41‧‧‧ OD
D44‧‧‧ outside diameter
D26‧‧‧ distance
D31‧‧‧Inner diameter
D33‧‧‧Inner diameter
D41‧‧‧Inner diameter
E41‧‧‧ distance

1 is a left side view of a tie member of an embodiment of the present invention. Figure 2 is a front elevational view, partially in section, of a tie member of Figure 1. Figure 3 is a right side view of the tie of Figure 1. Figure 4 is an exploded perspective view of the tie member of Figure 1. Figure 5 is a left side view of the nut outside the tie of Figure 1. Fig. 6 is a front cross-sectional view showing a portion of the nut outside the outer portion of Fig. 5. Figure 7 is a left side view of the bulbous sleeve of the tie of Figure 1. Figure 8 is a cross-sectional view of the bulbous sleeve of Figure 7. Figure 9 is a left side view of the inner nut of the tie of Figure 1. Figure 10 is a front elevational view, partially in section, of the inner nut of Figure 9. Fig. 11 is a perspective view showing a state in which the tie member of Fig. 1 has been attached to the member to be mounted. Figure 12 is a perspective view of the tie member of Figure 11 as viewed from another direction. Figure 13 is a front elevational view, partially in section, of a tie member of Figure 11. Figure 14 is a perspective view showing the intermediate stage of the detaching of the tie member from the state of Figure 11; Figure 15 is a perspective view showing the stage in which the tie member is completely removed from the state of Figure 14.

1a‧‧‧Connected parts assembly

10‧‧‧ bolt

11‧‧‧Bolt head

20‧‧‧ outer nut

23‧‧‧ outer surface

30‧‧‧Ball-shaped sleeve

31‧‧‧1st cylindrical part

32‧‧‧2nd cylindrical part

33‧‧‧3rd cylindrical part

40‧‧‧ inner nut

41‧‧‧ Nut sliding part

42‧‧‧Cylinder cylindrical part

44‧‧‧ Nut head

Claims (9)

A tie member for fastening a member to be mounted with a mounting hole, and comprising: a bolt having a bolt head and a shaft portion adjacent to the bolt head and having a male thread An outer nut having a nut hole extending in the axial direction and a polygonal outer surface; a bulb-shaped sleeve which is cylindrical and formed with a sleeve hole; and an inner nut having a a cylindrical portion extending in the axial direction, a cylindrical portion having a female thread formed inside the inner nut hole, and a nut head formed at one end of the cylindrical portion; and the shaft portion of the bolt is inserted The inner nut hole of the inner nut, one of the male threads of the bolt is screwed with the female thread of the inner nut; the cylindrical portion of the inner nut is located at the sleeve of the bulb-shaped sleeve a front end portion of the cylindrical portion is located in a nut hole outside the outer nut; and the front end portion of the cylindrical portion of the inner nut is slidable in the axial direction relative to the outer nut but is not rotatable The way is supported by the aforementioned outer nut The bulbous sleeve is held between the outer surface of the outer nut and the nut end of the inner nut adjacent to the nut head at the outer circumference of the cylindrical portion of the inner nut . The binding member of claim 1, wherein the outer nut hole of the outer nut has a polygonal cross section; and the outer peripheral surface of the cylindrical portion of the inner nut is a polygonal shape of the outer nut hole The number of equal numbers forms a sliding plane extending at equal intervals in the axial direction, and the sliding plane abuts against the inner surface of the polygon of the outer nut hole. The binding member of claim 2, wherein the polygon of the outer nut hole is hexagonal, and the number of the sliding planes is 6. The tie member of claim 1, wherein the outer nut hole of the outer nut is formed with a plurality of recesses extending in the axial direction; and a peripheral surface of the outer cylindrical portion of the inner nut is formed to be engaged with a plurality of convex portions extending in the axial direction of the concave portion of the outer nut hole and axially slidable. The binding member of claim 1, wherein the outer nut hole of the outer nut is formed with a key groove extending in the axial direction; and a peripheral surface of the cylindrical portion of the inner nut is formed to be engaged with the outer surface The aforementioned keyway of the nut hole and axially slidable axially extending key. The tie member according to any one of claims 1 to 5, wherein an outer diameter and an inner diameter of the axial center portion of the bulb-shaped sleeve are larger than an outer diameter and an inner diameter of the axial end portion, respectively, and are soft. It is made of metal, and the axial center portion is easily expanded in diameter. The tie member according to any one of claims 1 to 5, wherein the axial center portion of the bulb-shaped sleeve has a wall thickness thinner than that of the axial end portion, and is made of a soft metal, and the axial direction The central part is easy to expand. A tying structure characterized in that the tying member is used to fasten a member to be mounted with a mounting hole, and the tying member is provided with: a bolt having a bolt head and adjacent to the bolt head a shaft portion formed with a male thread; an outer nut having a nut hole penetrating in the axial direction and a surface having a polygonal cross section, and located on a surface of the bolt head of the bolt and a surface of the member to be mounted a bulb-shaped sleeve having a cylindrical shape and formed with a sleeve hole; and an inner nut having an inner nut hole extending in the axial direction and a female thread formed inside the inner nut hole a cylindrical portion and a nut head formed at one end of the cylindrical portion; and the shaft portion of the bolt is inserted into the inner nut hole of the inner nut, the male thread of the bolt and the inner screw The aforementioned female thread of the cap is screwed; the cylindrical portion of the inner nut is located in the sleeve hole of the bulb-shaped sleeve and the outer nut hole of the outer nut; the cylindrical portion of the inner nut In comparison with the aforementioned outer nut The method of rotating is supported in the outer nut hole; the bulbous sleeve is held in the outer peripheral edge of the cylindrical portion of the inner nut in the mounting hole of the inner member a surface and a nut step of the inner nut adjacent to the nut head, and an enlarged diameter portion of the bulbous sleeve is present adjacent to a surface of the mounted member, so that the mounted member is The first outer nut is fastened between the one surface and the enlarged diameter portion. The tying structure of claim 8, wherein the outer nut hole of the outer nut has a polygonal cross section; and the outer peripheral surface of the cylindrical portion of the inner nut is a polygonal shape of the outer nut hole The number of equal numbers forms a sliding plane extending at equal intervals in the axial direction, and the sliding plane abuts against the inner surface of the polygon of the outer nut hole.