JP2016121800A - Torque share bolt, fixing nut and bolt assembly including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torque share bolt capable of easily being fastened in accordance with the specified torque and a bolt assembly including the same devised for solving the prior art problems described above.SOLUTION: This invention discloses a torque share bolt constituted to enable it to be confirmed that a pin tail part is broken by the specified torque and fastened with stable axial force, a fixing nut fastened with a screw to a bolt passing through an object under a state in which it is fixed to any one of the objects to be fastened so as not to be rotatable and a bolt assembly including the same. The torque share bolt includes the pin tail part that is separated from a bolt main body when it reaches the specified torque when it is rotated by a tool. The fixing nut includes an inserting part and a hook part hooked at one surface of a first object, the one surface of the first object is formed by a curved surface and a hook surface surface-contacted with the one surface of the first object is formed by a curved surface.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a torque share bolt, a fixing nut, and a bolt assembly including the same.

  Generally, a bolt is a typical machine element used when two members, machine parts, and the like are fastened to a nut or a screw hole. Such a bolt is normally extended from the head part to be tightened to a nut or a screw hole so that torque can be applied with a tool such as a spanner or a socket wrench. And a thread portion in which a thread is formed.

  When a bolt is screwed into a nut or a screw hole, it should be fastened with a specified torque required for each machine part, but the specified torque is different for each part even in one part. Therefore, when an operator tries to normally fasten a bolt, he / she should work using a torque wrench according to the torque required by the manual by looking at the work manual.

  However, it is very cumbersome for an operator to use a torque wrench to fasten the bolts to the specified torque while looking at the work manual one by one. Conclusion was made. However, since the operator's feeling varies depending on various factors, it is very difficult to accurately tighten the bolt based on the specified torque. If the bolt fastening failure is not a problem, it does not matter, but if it affects the performance of machine parts, it may cause a problem.

  A torque shear bolt developed to solve such a problem is disclosed in Patent Document 1 (Korea registered utility model publication No. 0354219) under the name "hexagon head torque bolt with washer". Yes.

  According to Patent Document 1, a pin tail portion is formed at the tip of a screw portion constituting a bolt, and a notch portion having a smaller diameter than the screw portion is formed between the screw portion and the pin tail portion. When the nut is inserted into the threaded portion and the nut is rotated using a tool, the notch portion is twisted and broken when the specified torque is reached. It can be confirmed that the nut has been rotated to about the specified torque from the breakage of the notch portion.

  In the case of the torque share bolt according to Patent Document 1 having such a configuration, when the specified torque is reached in the process of tightening the nut, the notch portion is twisted and breaks. Difficult to do. That is, the fastening using the torque share bolt according to Patent Document 1 is performed by inserting the nut into the screw portion of the bolt and then rotating the nut with the tool in a state where the head of the bolt is caught with the tool and the bolt is fixed. Is called. Therefore, it is difficult to apply in a situation where the bolt assembly needs to be performed with the nut positioned inside the narrow pipe.

  On the other hand, with the two objects to be fastened together, the bolts are penetrated from one side through the holes formed in the two objects, and the nuts are fastened from the other side by fastening the nuts to the screw parts of the bolts. Done.

  In the case of a fastening method using bolts and nuts, be sure to fasten by tightening one of the bolts and nuts with a tool and rotating the nut or bolt with the tool on the opposite side. Is done. When the size of the object to be fastened is small, the worker can work alone, and when the size of the object is large, the work is performed through cooperation with other workers.

  However, in a work environment in which bolts and nuts cannot be fixed with a tool, fastening work using bolts and nuts is difficult. For example, when a worker's work space is not secured, or when fastening work is required in an internal space where the worker cannot enter due to safety problems, it is difficult or impossible to fasten with normal bolts and nuts. .

  Therefore, the present applicant has developed a nut capable of fastening bolts and nuts even when the fastening work in the internal space is difficult, and has been registered in Patent Document 2.

  Patent Document 2 relates to a fastening reinforcement for a connector used as a nut in order to construct a support base in a connection structure of a square support base used in a temporary retaining wall method. The end of the square support is inserted into the outside of the coupler and fastened with the bolt and the fastening fastener for the coupler. Before the square support is inserted outside the coupler, the fastener for the coupler is tightened. Is inserted and fixed in advance so as to prevent rotation in the fastening hole inside the coupler.

  In the case of Patent Document 2 having such a fastening method, there is an advantage that the fastening work can be performed even in a place where the work of the operator is difficult, but since it can be applied only when the fastening surface is flat like a square support stand, It is difficult to apply in the fastening of objects having non-fastening surfaces.

Korean Registered Utility Model Publication No. 0354219 Korean Registered Utility Model Publication No. 0454383

  An object of the present invention is to solve the conventional problems as described above, and to provide a torque share bolt that can be easily fastened according to a specified torque and a bolt assembly including the same.

  Another object of the present invention is to provide a fixing nut applicable to fastening of an object and a bolt assembly including the same even when the surface of the object to be fastened is a curved surface.

  The torque share bolt according to the present invention penetrates through an object to be fastened, and a nut for fastening the object is fastened to both ends of the bolt body, and the bolt body is integrally extended from one end of the bolt body and held by the tool. And a pin tail portion that can be separated from the bolt body by reaching a specified torque when rotated by a tool.

  In addition, spline protrusions that are generally perpendicular to the length direction are formed on the outer surface of the pin tail portion so as to be spaced apart, and the pin tail portion and the bolt body are formed with a diameter smaller than the diameter of the pin tail portion. A notch is formed that is broken when it reaches the specified torque.

  The bolt body has a threaded portion at one end and the other end, and the two threaded portions are formed in the same direction or in opposite directions.

  The bolt assembly according to the first preferred embodiment of the present invention prevents the rotation of the first object outside the first object located at the edge of one of the torque share bolts and the objects to be fastened. And a fixing nut that is screwed to one end of a bolt body of a torque share bolt that is fixed as described above and penetrates the object.

  The fixing nut is inserted and fixed in a nut fixing hole formed in the first object, and is extended from one end of the insertion portion and an insertion portion in which one end portion of the bolt main body is inserted. A hook portion having a cross-sectional area larger than the cross-sectional area of the first portion and hooking on one surface of the first object so that one end portion of the bolt main body passes therethrough.

  In addition, a spline protrusion is formed in the length direction on the outer surface of the insertion portion and is forcedly inserted into a nut fixing hole formed in the first object to be fastened, or the outer surface of the insertion portion Is inserted into the nut fixing hole without being splined and fixed by joining.

  In addition, the bolt assembly according to the first preferred embodiment of the present invention is screwed to the other end of the bolt body outside the second object located on the opposite side to the first object among the objects to be fastened. It further includes a high-strength nut that can be in close contact with the outer surface of the object.

  In addition, after the high-strength nut is fastened to the other end of the bolt body with a primary screw, torque is applied using a tool in a direction in which the bolt body is fastened to the fixed nut in a state in which rotation is prevented using the tool. By rotating the pin tail portion of the shear bolt, the high-strength nut can be in close contact with the outer surface of the second object.

  Further, at both ends of the bolt body, thread portions to which the fixing nut and the high-strength nut are respectively screwed are formed, but the two thread portions have opposite thread directions.

  The fixing nut of the present invention is a fixing nut that is fixed to the first object outside the first object located at one edge of the fastening target object so as to be prevented from rotating. It is inserted and fixed in the formed nut fixing hole so as to prevent rotation, and extends from the insertion part through which the screw part of the bolt penetrates the center and one end of the insertion part. A hook portion that has a large cross-sectional area and hangs on one surface of the first object, wherein the one surface of the first object is formed as a curved surface, and hangs on one surface of the first object in the insertion portion The hooking surface to be brought into surface contact is formed as a curved surface so as to correspond to the shape of one surface of the first object.

  In addition, one surface of the first object is formed with a curved surface having a regular radius of curvature or an irregular radius of curvature, and the hanging surface of the hanging portion is formed with a curved surface corresponding to the curved surface of the first object. The entire surface of the first object is in surface contact.

  In addition, the bolt assembly according to the second preferred embodiment of the present invention is configured to sequentially pass through the object through the fixing nut and the second object located on the opposite side of the first object among the objects to be fastened. , A bolt that is screwed to the fixing nut, and a washer that is inserted into the bolt outside the second object and is in close contact with one surface of the second object.

  In addition, one surface of the second object is formed of a curved surface having a regular curvature radius or an irregular curvature radius, and one surface that is in close contact with the one surface of the second object among both surfaces of the washer is the first surface. It is formed with a curved surface corresponding to the shape of one surface of two objects.

  The bolt penetrates the object to be fastened, one end is screwed to the individual nut and the other end is screwed to the tightening nut outside the second object, and the bolt A pin tail portion that is integrally extended from the other end of the main body, can be held and rotated by the tool, and can be separated from the bolt main body when a predetermined torque is reached when rotating with the tool.

  In addition, spline protrusions that are generally perpendicular to the length direction are formed on the outer surface of the pin tail portion so as to be spaced apart, and the pin tail portion and the bolt body have a diameter smaller than the diameter of the pin tail portion. A notch portion that is formed and is broken when it reaches a prescribed torque is formed.

  In addition, after the fastening nut is fastened to the other end of the bolt body with a primary screw, the bolt body is fastened to the fixing nut in a state in which rotation is prevented using a tool. When the pin tail portion of the torque share bolt is rotated using a tool, the fastening nut may be brought into close contact with the outer surface of the second object through the washer.

  The bolt includes a bolt body that passes through an object to be fastened and is screwed to the fixing nut.

  According to the present invention, it is possible to provide a torque share bolt that can be easily fastened according to a prescribed torque and a bolt assembly including the same.

  ADVANTAGE OF THE INVENTION According to this invention, even when the surface of the object of fastening is a curved surface, the fixing nut applicable to fastening of an object and a bolt assembly including this can be provided.

1 is a perspective view showing a framework to which a torque share bolt and a bolt assembly according to a first preferred embodiment of the present invention are applied. FIG. Sectional drawing of FIG. Drawing which shows the torque share volt | bolt, fixing nut, and high strength nut which were shown in FIG. The perspective view of the fixing nut shown in FIG. Sectional drawing which shows the state by which the fixing nut shown in FIG. 2 was fixed to the inner side plate. 1 is a view showing a configuration for connecting an H-shaped steel beam to a steel pipe column through a torque share bolt and a bolt assembly according to a first preferred embodiment of the present invention; 1 is a view showing a configuration for connecting an H-shaped steel beam to a steel pipe column through a torque share bolt and a bolt assembly according to a first preferred embodiment of the present invention; 1 is a view showing a configuration for connecting an H-shaped steel beam to a steel pipe column through a torque share bolt and a bolt assembly according to a first preferred embodiment of the present invention; 1 is a view showing a configuration for connecting an H-shaped steel beam to a steel pipe column through a torque share bolt and a bolt assembly according to a first preferred embodiment of the present invention; (A)-(f) is drawing which shows various embodiment of a fixing nut. (A), (b) is drawing which shows the form by which a part of hook part which comprises a fixed nut was inserted in the hole drilled in the member. (A), (b) is a drawing showing a form in which a base material and a plate material are coupled through a bolt assembly according to a preferred first embodiment of the present invention. (A)-(c) is a drawing showing a configuration in which a base material and a plate material are combined when a fixing nut constituting a bolt assembly according to a first preferred embodiment of the present invention has a position determining pin. FIG. 6 is a perspective view showing a frame to which a fixing nut and bolt assembly according to a second preferred embodiment of the present invention is applied. FIG. 15 is a cross-sectional view of FIG. 14. The side view of the fixing nut shown in FIG. Sectional drawing which shows the structure by which the fixing nut shown in FIG. 15 was fixed to the inner side plate. Sectional drawing which shows the structure by which the fixing nut shown in 15 was fixed to the inner side plate. FIG. 16 is a view showing the torque share bolt shown in FIG. 15. The side view of the washer shown in FIG. The figure which shows the structure by which the washer was contacted to one surface of the outer side plate on the outer side of the steel pipe. The figure which shows the structure by which the washer was contacted to one surface of the outer side plate on the outer side of the steel pipe. The figure which shows the structure fastened, fixing a nut and a washer in contact with the object which has a curved surface with an irregular curvature radius. 6 is a view showing a configuration for connecting an H-shaped steel beam to a steel pipe column through a bolt assembly according to a second preferred embodiment of the present invention; 6 is a view showing a configuration for connecting an H-shaped steel beam to a steel pipe column through a bolt assembly according to a second preferred embodiment of the present invention; 6 is a view showing a configuration for connecting an H-shaped steel beam to a steel pipe column through a bolt assembly according to a second preferred embodiment of the present invention; The drawing which shows the structure which connects a steel pipe pillar and a steel pipe pillar through the volt | bolt assembly by preferable 2nd Example of this invention. The drawing which shows the structure which connects a steel pipe pillar and a steel pipe pillar through the volt | bolt assembly by preferable 2nd Example of this invention. The drawing which shows the structure which connects a steel pipe pillar and a steel pipe pillar through the volt | bolt assembly by preferable 2nd Example of this invention. FIGS. 4A and 4B are views showing various embodiments of a fixing nut. FIG. (A), (b) is drawing which shows the form by which a part of hook part which comprises a fixed nut was inserted in the hole drilled in the member. (A), (b) is a drawing showing a form in which a base material and a plate material are coupled through a bolt assembly according to a preferred first embodiment of the present invention. (A)-(c) is drawing which shows the structure by which the base material and the board | plate material were combined, when the fixing nut of this invention has a position determination pin.

  The present invention relates to a torque share bolt, a fixing nut, and a bolt assembly including the same. More specifically, any one of the torque share bolt and the object to be fastened is configured so that it can be confirmed that the pin tail portion is broken by a constant torque and fastened with a stable axial force. The present invention relates to a fixing nut that is screwed to a bolt that penetrates an object in a state where it is fixed so that it cannot rotate, and a bolt assembly including the same.

  Hereinafter, preferred embodiments of a torque share bolt, a fixing nut, and a bolt assembly including the same will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a framework to which a torque share bolt and a bolt assembly according to a first preferred embodiment of the present invention are applied, and FIG. 2 is a cross-sectional view of FIG.

  The framework shown in FIGS. 1 and 2 has a form in which beams 20 made of H-shaped steel are connected to the outer four surfaces of a steel pipe column 10 made of a square steel pipe. Brackets 30 and 40 are respectively provided on the upper and lower sides of the beam 20 to support the beam 20, and an outer plate 50 for expanding the contact area with the steel pipe column 10 is joined to the end of the beam 20. It is a form. An inner plate 60 is provided inside the steel pipe column 10.

  After the fixing nut 70 is fixed to the inner plate 60, the bolt body of the torque share bolt 80 is passed through the brackets 30, 40 and the outer plate 50 and the side surface of the steel pipe column 10 from the outside of the steel pipe column 10, and then the bolt Since one end of the main body is screw-fastened to the fixing nut 70 and the high-strength nut 90 is screw-fastened to the other end of the bolt main body, the brackets 30 and 40, the outer plate 50, the steel pipe column 10 and the inner plate 60 are fastened together. Is done.

  In the case of a frame having such a connection structure, it is difficult for an operator to enter the inside of the steel pipe column 10 or to work by inserting a tool, so that the frame is fixed to an object to be fastened (an object to be fastened). The fastening operation is performed using the fixing nut 70. Torque is applied to the fixing nut 70 only to the torque share bolt 80 outside the steel pipe column 10 without applying torque. For reference, FIGS. 1 and 2 show the torque share bolt 80 in a state in which a pin tail portion 82 described later is separated in the fastening process.

  FIG. 3 is a view illustrating the torque share bolt, the fixing nut, and the high-strength nut illustrated in FIG. 2.

  The torque share bolt 80 penetrates the object to be fastened, and the bolt body 81 in which the fixing nut 70 and the high-strength nut 90 are respectively screwed through both ends of the object, and the other end of the bolt body 81. The pin tail portion 82 is separated from the bolt body 81 when a predetermined torque is reached when the tool is extended and rotated with a tool.

  On one end and the other end of the bolt body 81, thread portions 81a and 81b to which the fixing nut 70 and the high-strength nut 90 are respectively screwed are formed. The screw threads of the two screw thread portions 81a and 81b are formed in the same direction or in opposite directions depending on the fastening method. When formed in the opposite direction, the nuts 70 and 90 are loosened even when vibration is applied to the structure with the beam 20 fastened to the steel pipe column 10 with the torque share bolt 80 and the fixing nut 70 and the high strength nut 90. Can be prevented. That is, even if any one of the nuts is loosened, the other nuts are tightened, so that the fastened state can be stably maintained.

  The direction of the thread formed on the inner side of the fixing nut 70 and the high-strength nut 90 is determined by the direction of the thread parts 81 a and 81 b formed on the bolt body 81.

  Spline protrusions 82a that are substantially perpendicular to the length direction are formed on the outer surface of the pin tail portion 82 so as to be separated from each other, and the pin tail portion 82 and the bolt main body 81 are separated when the specified torque is reached. In the meantime, a notch portion 83 is formed which is formed with a diameter smaller than that of the pin tail portion 82 and is broken when reaching a specified torque.

  4 is a perspective view of the fixing nut shown in FIG. 2, and FIG. 5 is a cross-sectional view showing a state where the fixing nut shown in FIG. 2 is fixed to the inner plate.

  The fixing nut 70 is forcibly inserted into the nut fixing hole 60a of the inner plate 60, and extends from the inserting portion 71 so that the fixing nut 70 is inserted into the nut fixing hole 60a. A hanging portion 72 is formed. At the center of the insertion portion 71, a coupling hole 71a is formed through which the bolt body 81 of the torque share bolt 80 is screw-coupled. A spline protrusion 71b for forced insertion in the nut fixing hole 60a is formed on the outer surface. It is formed.

  The spline protrusion 71 b is formed substantially perpendicular to the length direction of the insertion portion 71. Therefore, when the inner portion of the nut fixing hole 60a is formed smaller than the outer diameter of the insertion portion 71 including the spline protrusion 71b, the insertion portion 71 is forcibly inserted when the insertion portion 71 is strongly inserted into the nut fixing hole 60a. Even if force is applied in the circumferential direction in the process of screwing the bolt 80 to the connecting hole 71a, the spline protrusion 71b prevents the insertion portion 71 from rotating.

  The hook portion 72 extends from one end of the insertion portion 71 and has an outer diameter larger than the outer diameter of the insertion portion 71. Therefore, when the insertion portion 71 is inserted into the nut fixing hole 60a, the hook portion 72 is in close contact with one surface of the inner plate 60. To do. A coupling hole 72a through which the torque share bolt 80 is screw-coupled is connected to the coupling hole 71a of the insertion portion 71 at the center of the hook portion 72.

  The fixing nut 70 having such a configuration is inserted into the steel pipe column 10 together with the inner plate 60 while being fixed to the inner plate 60.

  Hereinafter, a configuration for connecting the H-shaped steel beam 20 to the steel pipe column 10 through the torque share bolt and the bolt assembly according to the first preferred embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 6, an inner plate 60 to which a fixing nut 70 is fixed is inserted inside the steel pipe column 10. Since it is difficult for an operator to enter the inside of the steel pipe column 10 or insert a tool, the fixing nut 70 is fixed to the inner plate 60 in advance before the inner plate 60 is inserted into the steel pipe column 10. As described above, the fixing nut 70 is fixed by forcibly inserting the insertion portion 71 into the nut fixing hole 60 a of the inner plate 60. For this reason, the inner diameter of the nut fixing hole 60a is formed smaller than the outer diameter of the insertion portion 71 including the spline protrusion 71b. Since the spline protrusion 71b is forcibly inserted into the nut fixing hole 60a while being formed substantially perpendicular to the length direction of the insertion portion 71, the bolt body 81 of the torque share bolt 80 is inserted into the fixing nut 70 and rotated. However, the rotation of the fixing nut 70 is prevented.

  As shown in FIG. 7, the outer plate 50 joined to the end of the beam 20 in a state where the inner plate 60 to which the fixing nut 70 is fixed is inserted into the inner side of the steel pipe column 10 and is brought into contact with the inner side surface is the steel pipe. The outer surface of the pillar 10 is contacted. Thereafter, the bolt body 81 of the torque share bolt 80 is passed through the outer plate 50 and the through hole formed in the steel pipe column 10 from the outside of the steel pipe column 10 and then inserted into the fixing nut 70.

  As shown in FIG. 8, after inserting one end of the bolt body 81 constituting the torque share bolt 80 into the fixing nut 70 and inserting the high strength nut 90 into the other end of the bolt body 81 outside the steel pipe column 10, Only the pin tail portion 82 is rotated in one direction so that the bolt main body 81 is fastened to the fixing nut 70 by holding the high-strength nut 90 with the exclusive wrench W outside the column 10 so as to prevent the rotation. By rotating the pin tail portion 82, the bolt body 81 rotates and advances toward the inside of the steel pipe column 10, and in this process, the high-strength nut 90 gradually approaches the outer surface of the outer plate 50 as shown in FIG. 9. Finally it will stick. In the fastening process, torque is continuously applied to the pin tail portion 82, and when the specified torque is reached, the notch portion 83 is broken and the pin tail portion 82 is separated from the bolt body 81. When the pin tail portion 82 is separated, it is determined that proper fastening has been performed, and the fastening operation is completed.

  When the direction of the thread formed inside the fixing nut 70 and the high-strength nut 90 is the direction of the thread of a normal nut, the two threaded portions 81a and 81b formed at both ends of the bolt body 81 Since it is formed opposite to the direction of the screw thread, the fastening operation as described above can be performed. If the two screw thread portions 81a and 81b are formed in the same direction, the screw formed inside the fixed nut 70 or the high-strength nut 90 so as to enable the above-described fastening operation. The direction of the ridge can be formed opposite to the direction of the thread of a normal nut.

  FIG. 10 is a view showing various embodiments of the fixing nut.

  As shown in FIG. 10, the fixing nut 70 can be implemented in various forms. The hanging portion 72 can be implemented in various forms such as a circular shape or a hexagonal shape, and the insertion portion 71 can also be implemented in a form in which the spline projection 71b is formed entirely or partially, and can be implemented in a form without the spline projection 71b. . In the case of the fixing nut 70 in which the spline protrusion 71b is not formed, the surface in contact with the member is joined and fixed through stud welding or the like with the insertion portion 71 inserted into the nut fixing hole drilled in the member.

  As shown in FIGS. 10B, 10 </ b> C, 10 </ b> E, and 10 </ b> F, when the spline projection 71 b is formed only on a part of the insertion portion 71, the end portion where the spline projection 71 b is not formed. Plays the role of the position determination pin 71c for positioning the fastening position during construction. That is, when the fixing nut 70 is fixed to the inner plate 60, the position determining pin 71 c is configured to protrude to the opposite side of the inner plate 60. That is, the hook portion 72 projects from one side of the inner plate 60, and the position determination pin 71c projects from the other side (opposite side) of the inner plate 60. Therefore, since the position determination pin 71c is inserted into the bolt through hole formed in the steel pipe column 10 in the process of inserting the inner plate 60 to which the fixing nut 70 is fixed into the steel pipe column 10, the fastening position of the inner plate 60 is determined. Accurately positioned. If the positioning pin 71c penetrates the steel pipe column 10 and protrudes to the outside of the steel pipe column 10, the positioning pin 71c is positioned to the fastening position of the outer plate 50 joined to the end portion of the beam 20. On the other hand, the outer diameter of the position determining pin 71c is smaller than the outer diameter of the portion where the spline protrusion 71b is formed.

  On the other hand, the position determining pin 71c is applicable not only when the spline protrusion 71b is formed outside the insertion portion 71 but also when the spline protrusion 71b is not formed.

  FIG. 11 is a view showing a form in which a part of the hook portion constituting the fixing nut is inserted into a hole drilled in the member.

  As shown in FIG. 11, the hook portion 72 constituting the fixing nut 70 is inserted into a nut fixing hole h that is partially drilled in the member. At this time, the nut fixing hole h is formed to have a step in a form in which the cross-sectional area of the portion where the hook portion 72 is inserted is larger than the portion where the insertion portion 71 is inserted. Further, the shape of the portion into which the hook portion 72 is inserted may be formed in an inclined shape as shown in FIG. 11B as well as the shape shown in FIG.

  FIG. 12 is a view showing a form in which a base material and a plate material are coupled through a bolt assembly according to a first preferred embodiment of the present invention.

  Looking at the form in which the base material 1 and the plate material 2 are joined by the bolt assembly of the present invention, as shown in FIG. 12 (a), the plate material 2 is joined to one surface of the base material 1, or As shown in FIG. 12B, the plate material 2 is bonded to both surfaces of the base material 1. In addition, the base material 1 and the plate material 2 can be connected in various connection modes.

  FIG. 13 is a view showing a structure in which a base material and a plate material are combined when a fixing nut constituting the bolt assembly according to the first preferred embodiment of the present invention has a position determining pin.

  In the case where the fixing nut 70 is provided with the position determining pin 71c, as shown in FIGS. 13 (a) and 13 (b), the position determining pin 71c is coupled in such a manner that it is inserted only into the base material 1, or FIG. As shown in (c), the position determination pin 71c is coupled in such a manner that it is inserted up to the plate 2 opposite to the base material 1.

  14 is a perspective view showing a framework to which a fixing nut and bolt assembly according to a second preferred embodiment of the present invention is applied, and FIG. 15 is a cross-sectional view of FIG.

  The frame shown in FIGS. 14 and 15 has a form in which four beams 120 made of H-shaped steel are connected to the outside of a steel pipe column 110 made of a circular steel pipe at 90 °. Brackets 130 and 140 are respectively provided on the upper and lower sides of the beam 120 to support the beam 120, and an outer plate 150 for expanding the contact area with the steel pipe column 110 is joined to the end of the beam 120. It is a form. An inner plate 160 is provided inside the steel pipe column 110.

  After the fixing nut 170 is fixed to the inner plate 160, the bolt body of the torque share bolt 180 is passed from the outside of the steel pipe column 110 to the brackets 130, 140 and the outer plate 150, and then to the side surface of the steel pipe column 110. Since one end of the bolt body is screw-fastened to the fixing nut 170 and the washer 190 is inserted into the other end of the bolt body, and then the high-strength fastening nut 200 is screw-fastened, the brackets 130 and 140, the outer plate 150, the steel pipe column 110 and the inner plate 160 are fastened together.

  On the other hand, at the upper end of the lower steel pipe column 110 located at the lower part of the steel pipe column 110, the upper steel pipe column 110 passes through the outer plate 150, the inner plate 160, the fixing nut 170, the torque share bolt 180, the washer 190, and the fastening nut 200. Connected. The fastening structure of the fixing nut 170, the torque share bolt 180, the washer 190, and the fastening nut 200 is the same as the fastening structure for connecting the beam 120 to the steel pipe column 110, and the connecting process of the two steel pipe columns 110 will be described later.

  In the case of a frame having such a connection structure, it is difficult for an operator to enter directly inside the steel pipe column 110 or to work by inserting a tool. Therefore, a fixing nut 170 fixed to the object to be fastened is used. Fastening work is performed. Torque is only applied to the torque share bolt 180 from the outside of the steel pipe column 110 without applying torque to the fixing nut 170. For reference, FIGS. 14 and 15 show the torque share bolt 180 in a state where a pin tail portion 182 described later is separated in the fastening process.

  16 is a side view of the fixing nut shown in FIG. 15, and FIGS. 17 and 18 are cross-sectional views showing a configuration in which the fixing nut shown in FIG. 15 is fixed to the inner plate.

  The fixing nut 170 is forcibly inserted into the nut fixing hole 161 of the inner plate 160 so as to be prevented from rotating, and the fixing nut 170 is extended from the insertion part 171 when the inserting part 171 is inserted into the nut fixing hole 161. , And a hook portion 172 that is hooked while being in surface contact with one surface of the inner plate 160. A coupling hole is formed at the center of the insertion portion 171 and the hook portion 172 so that a bolt main body 181 (to be described later) of the torque share bolt 180 is threaded and joined.

  A spline protrusion 171 a for forced insertion in the nut fixing hole 161 is formed on the outer surface of the insertion portion 171. The spline protrusion 171 a is formed substantially perpendicular to the length direction of the insertion portion 171. Therefore, when the insertion portion 171 is strongly pressed into the nut fixing hole 161 in a state where the inner diameter of the nut fixing hole 161 is smaller than the outer diameter of the insertion portion 171 including the spline protrusion 171a, the insertion portion 171 is forcibly inserted. Even if a force is applied in the circumferential direction in the process of screw coupling the torque share bolt 180 to the coupling hole, the spline protrusion 171a prevents the insertion portion 171 from rotating.

  The hook portion 172 extends from one end of the insertion portion 171 and has an outer diameter larger than the outer diameter of the insertion portion 171, so that when the insertion portion 171 is inserted into the nut fixing hole 161, It adheres by surface contact.

  On the other hand, the inner plate 160 is formed with a surface so as to correspond to the shape of the circular steel pipe column 10, and the hanging surface 172a of the hanging portion 172 is also formed with a convex curved surface corresponding to this. That is, the inner plate 160 is formed to have a curved surface according to the shape of the circular steel pipe column 10 having a circular cross-sectional view. Further, the hooking surface 172a of the hooking portion 172 is also formed to have a curved surface according to the shape of the circular steel pipe column 10 having a circular cross-sectional view. When the contact form of the hooking surface 172a and the inner plate 160 is viewed from above, as shown in FIG. 17, it is in the form of a curved surface, but when viewed from the side (in a sectional view in the length direction), it is shown in FIG. Thus, it is generally vertical. Due to such a contact structure, the rotation of the fixing nut 170 is effectively prevented in the process of inserting the torque share bolt 180 into the connecting hole of the fixing nut 170 and screwing it. It is possible to prevent 170 from rotating. That is, the rotation prevention structure of the fixing nut 170 includes i) a forced insertion structure of the insertion portion 171 and ii) a contact structure of the hooking surface 172a and the inner plate 160.

  In the coupling hole, a thread is formed partly or entirely so that the bolt body 181 of the torque share bolt 180 is screw-coupled.

  The fixing nut 170 having such a configuration is inserted into the steel pipe column 110 together with the inner plate 160 in a state where the inner plate 160 is fixed.

  FIG. 19 is a view showing a torque share bolt.

  The torque share bolt 180 penetrates the object to be fastened, and the bolt nut 181 in which the fixing nut 170 and the fastening nut 200 are screwed through both ends of the object, and the other end of the bolt body 181 are integrated. The pin tail portion 182 is configured to be separated from the bolt body 181 when a specified torque is reached when extended and rotated with a tool outside the steel pipe column 110.

  Two screw thread portions 181a and 181b to which a fixing nut 170 (see FIG. 22, etc.) and a tightening nut 200 (see FIG. 21, etc.) are respectively screwed are formed at one end and the other end of the bolt body 181. . The screw threads of the two screw thread portions 181a and 181b are formed in the same direction or in opposite directions depending on the fastening method. When formed in the opposite direction, the torque shear bolt 180 and the fixing nut 170, and then the beam 120 is fastened to the steel pipe column 110 with the tightening nut 200, or the structure is vibrated with the steel pipe column 110 and the steel pipe column 110 being fastened. Even if added, the nuts 170 and 200 can be prevented from loosening. That is, even if any one nut is loosened, the other nuts are tightened, so that the fastened state can be stably maintained.

  The direction of the thread formed on the inside of the fixing nut 170 and the tightening nut 200 is determined by the direction of the thread portions 181a and 181b formed on the bolt body 181.

  Spline protrusions 182a that are substantially perpendicular to the length direction are formed on the outer surface of the pin tail portion 182 to be separated from each other, and the pin tail portion 182 and the bolt body 181 are separated when the specified torque is reached. A notch portion 183 is formed between the pin tail portion 182 and the pin notch portion 183.

  In the present embodiment, the torque share bolt 180 in which the pin tail portion 182 is integrally formed with the halt main body 181 is illustrated as being screwed to the fixing nut 170 using a dedicated wrench. However, the present invention is not limited thereto, and the pin tail portion 182 is not limited thereto. The bolt can be screwed to the fixing nut 170 without using a separate dedicated wrench.

  FIG. 20 is a side view of the washer shown in FIG. 15, and FIGS. 21 and 22 are views showing a configuration in which the washer is in contact with one surface of the outer plate outside the steel pipe.

  The outer plate 150 is also formed with a curved surface when viewed from above so as to correspond to the circular cross-sectional shape of the circular steel pipe column 110. One surface of the washer 190 that is in contact with the outer surface of the outer plate 150 is also formed as a concave curved surface when viewed from above. That is, when the contact form of one face of the washer 190 and the outer plate 150 is viewed from above, it is a curved surface form as shown in FIG. 21, but when viewed from the side (in the cross-sectional view in the length direction), FIG. As shown, it is generally vertical. The other surface of the washer 190 and the fastening nut 200 are in close contact with each other while being in surface contact in a planar form. That is, one surface of the washer 190 is circular in cross section, but the other surface of the washer 190 is planar in cross section, and the other surface of the washer 190 and the fastening nut 200 are in surface contact in a planar form. To do.

  Due to such a contact structure, rotation of the washer 190 is effectively prevented in the process of inserting the tightening nut 200 into the torque share bolt 180 from the outside of the washer 190 and tightening, and even if vibration is applied from the outside after fastening, the washer. Since rotation of 190 is prevented, loosening of the tightening nut 200 can be prevented.

  FIG. 23 is a view showing a configuration in which a fixing nut and a washer are brought into contact with an object having a curved surface with an irregular radius of curvature while being brought into contact therewith.

  The hooking surface 172a of the fixing nut 170 and one surface of the washer 190 are in contact with the surface of the object having a constant radius of curvature, but as shown in FIG. 23, the surface of the object having a curved surface with an irregular curvature radius is faced. The contact surface 172a of the fixing nut 170 and one surface of the washer 190 are also formed of curved surfaces having irregular curvature radii so as to correspond to the curved surface of the object.

  Hereinafter, a configuration for connecting an H-shaped steel beam to a steel pipe column through a bolt assembly according to a second preferred embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 24, an inner plate 160 to which a fixing nut 170 is fixed is inserted inside the steel pipe column 110. Since it is difficult for an operator to enter the steel tube pillar 110 or insert a tool, the fixing nut 170 is fixed to the inner plate 160 in advance before the inner plate 160 is inserted into the steel tube pillar 110.

  As described above, the fixing nut 170 is fixed by forcibly inserting the insertion portion 171 into the nut fixing hole 161 of the inner plate 160, and the hooking surface 172 a formed on one surface of the hooking portion 172 is the curved surface of the inner plate 160. It is formed in a curved surface so as to correspond to the shape, and is applied while being in surface contact with one surface of the inner plate 160.

  After the inner plate 160 to which the fixing nut 170 is fixed is inserted into the steel pipe column 110 and brought into contact with the inner surface, the outer plate 150 joined to the end of the beam 120 is connected to the steel pipe as shown in FIG. It is made to contact the outer surface of the pillar 110. Thereafter, the bolt main body 181 of the torque share bolt 180 is passed through the outer plate 150 and the through hole formed in the steel pipe pillar 110 from the outside of the steel pipe pillar 110 and then inserted into the fixing nut 170.

  After one end of the bolt body 181 constituting the torque share bolt 180 is inserted into the fixing nut 170, as shown in FIG. 26, a washer 190 and a fastening nut 200 are inserted into the other end of the bolt body outside the steel pipe column 110, The pin nut portion 182 is rotated in one direction so that the bolt body 181 is fastened to the fixing nut 170 by gripping the fastening nut 200 with the exclusive wrench W outside the steel pipe column 110 to prevent the fastening nut 200 from rotating. By rotating the pin tail portion 182, the bolt main body 181 moves forward while rotating, and in this process, the tightening nut 200 finally comes into close contact with the outer surface of the outer plate 150 as it gets closer. In the fastening process, torque is continuously applied to the pin tail portion 182, and when the specified torque is reached, the notch portion 183 is broken and the pin tail portion 182 is separated from the bolt body 181. When the pintail portion 182 is separated, it is determined that proper fastening has been performed, and the fastening operation is completed.

  When the direction of the thread formed inside the fixing nut 170 and the tightening nut 200 is the direction of the thread of a normal nut, the screws of the two threaded portions 181a and 181b formed at both ends of the bolt body 181 By forming it in the direction opposite to the mountain direction, the fastening operation as described above can be performed. Should the two screw thread portions 181a and 181b have the same screw thread direction, the screw thread formed inside the fixing nut 170 or the tightening nut 200 so as to enable the above-described fastening operation. Can be formed against the normal nut thread direction.

  After the fastening of the beam 120 is completed, the upper bracket 130 and the lower bracket 140 are positioned on the upper and lower portions of the beam 120, and then the brackets 130 and 140 are connected to the steel pipe column 110 through the same process as when the beam 120 is fastened. Fasten outside. Thereafter, the steps of fastening the beam 120 to the steel pipe column 110 are completed by fastening the brackets 130 and 140 to the upper and lower parts of the beam 120 using ordinary bolts, washers, and nuts.

  Hereinafter, a structure for connecting a steel pipe column and a steel pipe column through a bolt assembly according to a second preferred embodiment of the present invention will be described with reference to FIGS.

  When all the operations for connecting the beam 120 to the circular steel pipe column 110 are completed, the operation for connecting another circular steel pipe column 110 to the upper end of the circular steel pipe column 110 is performed.

  First, as shown in FIG. 27, the lower portion of the inner plate 160 to which the fixing nut 170 is fixed is positioned inside the upper end portion of the lower steel pipe column 110, and the lower portion of the outer plate 150 is positioned outside the upper end portion of the steel pipe column 110. Then, the bolt body 181 of the torque share bolt 180 is passed through the outer plate 150 and the through hole formed in the steel pipe pillar 110 from the outside of the steel pipe pillar 110 and inserted into the fixing nut 170.

  After inserting one end of the bolt body 181 constituting the torque share bolt 180 into the fixing nut 170, as shown in FIG. 28, the washer 190 and the fastening nut 200 are inserted into the other end of the bolt body 181 outside the steel pipe column 110. The pin nut 182 is clamped in one direction so that the bolt body 181 is fastened to the fixing nut 170 by gripping the tightening nut 200 with a continuous wrench (not shown) outside the steel pipe column 110 to prevent the bolt nut 181 from rotating. Fastening is completed by rotating. Here, the dedicated wrench is a dedicated tool used for accurately tightening the torque share bolt 180 and can be understood from a known technique, and thus detailed description thereof is omitted. When the specified torque is reached in the fastening process, the pin tail portion 182 is separated and the fastening operation is stopped.

  When the lower part of the inner plate 160 and the lower part of the outer plate 150 are fixed to the inner and outer sides of the upper end portion of the lower steel pipe column 110, the inner plate 160 protruding upward from the lower steel pipe column 110 as shown in FIG. A space for inserting the upper steel pipe column 110 is formed between the upper portion and the upper portion of the outer plate 150, and the lower end portion of the upper steel pipe column 110 is inserted between the spaces. Subsequently, the same fastening operation is advanced through the torque share bolts 180, and all the fastening operations of the lower steel pipe column 110 and the upper steel pipe column 110 are completed.

  FIG. 30 is a view showing various embodiments of the fixing nut.

  As shown in FIG. 30, the fixing nut 170 may be implemented in various forms. The hanging portion 172 can be implemented in various forms such as a circular shape or a hexagonal shape, and the insertion portion 171 can also be implemented in a form in which the spline protrusion 171b is formed only in whole or in part, and can be implemented in a form without the spline protrusion 171b. In the case of the fixing nut 170 in which the spline protrusion 171b is not formed, the surface in contact with the member is joined and fixed through stud welding or the like with the insertion portion 171 inserted into the nut fixing hole drilled in the member.

  A position determination unit 174 that positions a fastening position may be formed at the end of the insertion portion 171 during construction. That is, when the fixing nut 170 is fixed to the inner plate 160, the position determining unit 174 protrudes on the opposite side of the inner plate 160. Accordingly, in the process of inserting the inner plate 160 to which the fixing nut 170 is fixed into the steel pipe column 110, the position determining unit 174 is inserted into the bolt through hole formed in the steel pipe column 110, so that the fastening position of the inner plate 160 is reached. Is accurately positioned. If the position determining unit 174 penetrates the steel pipe column 110 and protrudes to the outside of the steel pipe column 110, the position determining unit 174 is positioned to the fastening position of the outer plate 150. On the other hand, the outer diameter of the position determining part 174 is formed smaller than the outer diameter of the insertion part 171.

  On the other hand, the thread formed on the inner surface of the coupling is formed over the entire coupling hole or only partially. Further, the length of the insertion portion 171 also varies depending on the thickness of the object to be fastened.

  FIG. 31 is a view showing a form in which a part of the hook portion constituting the fixing nut is inserted into a hole drilled in the member.

  As shown in FIG. 31, the hook portion 172 constituting the fixing nut 170 is inserted into a nut fixing hole h partially drilled in the member. At this time, the nut fixing hole h is formed to have a step in a form in which the cross-sectional area of the portion where the hooking portion 172 is inserted is larger than the portion where the insertion portion 171 is inserted. Further, the form of the portion into which the hooking portion 172 is inserted may be formed in an inclined form as shown in FIG. 31 (b) as well as the form of FIG. 31 (a).

  FIG. 32 is a view showing a form in which a base material and a plate material are coupled through a bolt assembly according to a first preferred embodiment of the present invention.

  Looking at the form in which the base material 1 and the plate material 2 are coupled by the bolt assembly of the present invention, as shown in FIG. 32A, the plate material 2 is coupled to one surface of the base material 1 or As shown in (b) of FIG. 32, the plate material 2 is bonded to both surfaces of the base material 1. Besides, it can be implemented in various coupling forms.

  FIG. 33 is a view showing a configuration in which a base material and a plate material are combined when the fixing nut of the present invention has a position determining pin.

  In the case where the fixing nut 170 is provided with the position determining unit 174, the position determining unit 174 is inserted only in the base material 1 as shown in FIGS. 33 (a) and 33 (b). As shown in (c), the position determining unit 174 is coupled in such a manner that it is inserted up to the plate 2 opposite to the base material 1.

  According to the torque share bolt, the fixing nut, and the bolt assembly including the same according to the present invention, the following effects can be expected.

  According to the present invention, it is possible to provide a torque share bolt that can be easily fastened according to a specified torque even in an assembly structure in which it is difficult to tighten a nut, and a bolt assembly including the same. That is, according to the present invention, when the objects are connected to each other by bolt assembly, the bolt assembly is easily performed even in a place where it is difficult to tighten the nut, and the bolt can be fastened with an appropriate torque, that is, a predetermined torque. The construction performance can be improved and the fastening performance can be improved.

  According to the present invention, it is possible to perform fastening work even when the work space of the worker is not secured, or even where the worker cannot approach due to safety problems, and the surface of the object to be fastened is a curved surface. In order to be applicable to fastening, it is possible to provide a fixing nut and a bolt assembly including the same, which are fixed to the surface of the object so as to be prevented from rotating. That is, according to the present invention, when the objects are connected to each other by assembling the bolts, the bolts can be easily tightened even in a place where it is difficult to tighten the nuts. In particular, when the surface of the object to be fastened has a curved surface, the contact surface of the fixing nut is also curved so as to correspond to it, so that it is fixed not only by the fastening process but also by vibration transmitted from the outside after fastening. It is possible to effectively prevent the nut from rotating.

  Moreover, according to this invention, since a volt | bolt can be fastened with appropriate torque, construction is prepared and a fastening performance can be improved.

  Further, according to the present invention, the washer inserted into the bolt outside the fixing nut is also formed with a curved surface so as to correspond to the shape of the surface of the object made of a curved surface. Rotation is prevented. Therefore, it is possible to prevent the nut that rotates while contacting the washer from rotating idle, and to prevent the fixed nut from rotating due to vibration transmitted from the outside after the fastening, so that the fastening state can be stably maintained.

  As described above, the torque share bolt, the fixing nut, and the bolt assembly including the torque share bolt of the present invention have been described in detail based on the preferred embodiments. However, the present invention is limited to the specific embodiments. Rather, various modifications can be made within the scope of the claims by a person having ordinary knowledge in the relevant field. For example, the thread portion formed on the bolt body may be in the form of a full screw bolt formed over the entire bolt body. Moreover, as a nut fastened with the other end of a bolt main body, the nut generally used can be used instead of a high strength nut.

  What has been described above is only one example for carrying out the secondary battery according to the present invention, and the present invention is not limited to the above-described embodiment, and as claimed in the following claims. It can be said that the technical spirit of the present invention extends to the extent that various modifications can be made by anyone who has ordinary knowledge in the field to which the present invention belongs without departing from the gist of the present invention.

10, 110: Steel pipe column 20, 120: Beam 30, 40, 130, 140: Bracket 50, 150: Outer plate 60, 160: Inner plate 70, 170: Fixing nut 71, 171: Insertion part 72, 172: Hanging part 174: Position determining section 80, 180: Torque shear bolt 81, 181: Bolt body 82, 182: Pin tail section 83, 183: Notch section 90: High strength nut 190: Washer 200: Clamping nut

Claims (17)

Bolt bodies that pass through the object to be fastened and nuts for fastening the object can be screwed at both ends,
A torque share bolt including: a pin tail portion that is integrally extended from one end of the bolt body, rotated by a tool, and can be separated from the bolt body when a specified torque is reached when rotating with the tool.   Spline protrusions that are generally perpendicular to the length direction are formed on the outer surface of the pin tail portion, and the pin tail portion and the bolt body are formed with a diameter smaller than the diameter of the pin tail portion to provide a specified torque. The torque share bolt according to claim 1, wherein a notch portion that is broken when the torque reaches is formed.   2. The bolt body according to claim 1, wherein a thread portion is formed at one end and the other end, and the two thread portions are formed in the same direction or in opposite directions. Torque share bolt described in 1. A torque share bolt according to any one of claims 1 to 3;
Among the objects to be fastened, the first object located on the edge of one side is fixed to the first object so as to be prevented from rotating, and is screwed to one end of the bolt body of the torque share bolt that penetrates the object. A bolt assembly for fastening objects together. The fixing nut is
An insertion part that is inserted and fixed in a nut fixing hole formed in the first object, and through which one end of the bolt body passes,
A hook portion that extends from one end of the insertion portion, has a cross-sectional area larger than the cross-sectional area of the insertion portion, is hooked on one surface of the first object, and one end portion of the bolt main body passes therethrough. The bolt assembly according to claim 4.   Spline protrusions are formed in the lengthwise direction on the outer surface of the insertion part and are forcibly inserted into a nut fixing hole formed in the first object to be fastened, or the outer surface of the insertion part is a spline 6. The bolt assembly according to claim 5, wherein the bolt assembly is inserted and fixed into a nut fixing hole without a protrusion.   A high-strength nut that can be screwed to the other end of the bolt body outside the second object located on the opposite side of the first object among the objects to be fastened and can be in close contact with the outer surface of the second object. The bolt assembly according to claim 5.   After the high-strength nut is fastened to the other end of the bolt body with a primary screw, the tool is used in the direction in which the bolt body is fastened to the fixed nut in a state where rotation is prevented using a tool. The bolt assembly according to claim 7, wherein the high-strength nut can be brought into close contact with an outer surface of the second object by rotating a pin tail portion of the torque share bolt.   Threaded portions to which a fixing nut and a high-strength nut are respectively screwed are formed at both ends of the bolt body, and the two threaded portions have opposite thread directions. The bolt assembly according to claim 8. Among the objects to be fastened, in a fixing nut that is fixed to the first object so as to be prevented from rotating outside the first object located on one side edge,
An insertion part that is inserted and fixed so as to be prevented from rotating in a nut fixing hole formed in the first object, and a screw part of a bolt passes through the center; and
A hook portion extending from one end of the insertion portion and having a cross-sectional area larger than the cross-sectional area of the insertion portion and hanging on one surface of the first object,
One surface of the first object is formed as a curved surface, and a hooking surface in surface contact with the one surface of the first object in the insertion portion is formed as a curved surface so as to correspond to the shape of the one surface of the first object. A fixing nut characterized by   One surface of the first object is formed by a curved surface having a regular radius of curvature or an irregular radius of curvature, and a hanging surface of the hanging portion is formed by a curved surface corresponding to the curved surface of the first object. The fixing nut according to claim 10, wherein the fixing nut is entirely brought into surface contact with one surface of an object. A fixing nut according to claim 10 or claim 11,
Among the objects to be fastened, through the second object located on the opposite side of the first object through the object in order, a bolt that is screwed to the fixing nut,
And a washer that is inserted into a bolt outside the second object and is in close contact with one surface of the second object.   One surface of the second object is formed of a curved surface having a regular radius of curvature or an irregular radius of curvature, and the one surface that is in close contact with the one surface of the second object among both sides of the washer is the second object. The bolt assembly according to claim 12, wherein the bolt assembly is formed by a curved surface corresponding to the shape of the one surface. The bolt is
A bolt body that penetrates the object to be fastened, one end is screwed to the solid nut, and the other end is screwed to the fastening nut on the outside of the second object;
The pin tail portion that is integrally extended from the other end of the bolt body and can be rotated by a tool, and can be separated from the bolt body when a specified torque is reached when the tool is rotated by the tool. The bolt assembly according to 1.   Spline protrusions that are generally perpendicular to the length direction are formed on the outer surface of the pin tail portion so as to be spaced apart, and are formed between the pin tail portion and the bolt body with a diameter smaller than the diameter of the pin tail portion. The bolt assembly according to claim 14, wherein a notch portion is formed to be broken when a prescribed torque is reached.   After the tightening nut is fastened to the other end of the bolt body with a primary screw, the tool is used to prevent the rotation of the bolt body in the direction in which the bolt body is fastened to the fixing nut. 16. The bolt assembly according to claim 15, wherein when the pin tail portion of the torque share bolt is rotated, the fastening nut can be brought into close contact with the outer surface of the second object through the washer. The bolt is
The bolt assembly according to claim 12, further comprising a bolt body that passes through an object to be fastened and is screwed to the fixing nut.

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