JP2019060440A - Fastening member and fastening method - Google Patents

Abstract

To more easily fasten overlapped multiple fastened bodies.SOLUTION: A temporary bolt 10 comprises: a screw part 11 which is provided in a front end of a shank thereof; and an alignment part 13 provided in a portion of the shank separated from the front end of the shank further than the screw part 11. The screw part 11 passes through-holes 1h and 2h of each of multiple fastened bodies and is fitted with a nut N thereafter, thereby fastening the multiple fastened bodies. The alignment part 13 enters the through-holes 1h and 2h, thereby aligning the through-holes 1h and 2h. The front end of the shank first passes the through-hole 2h of a first fastened body among the multiple fastened bodies and finally passes the through-hole 2h of a second fastened body most separated from the first fastened body in a vertical direction. In a state where the alignment part 13 enters the through-holes 1h and 2h of each of the fastened bodies and the nut N is fitted to the screw part 11, an end of the alignment part 13 closer to the front end of the shank is positioned within the through-hole 2h of the second fastened body.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a fastening member and a fastening method for fastening a plurality of to-be-fastened bodies in a stacked state, and in particular, a fastening member to be inserted into a through hole formed in each of a plurality of to-be-fastened bodies; The present invention relates to a fastening method using the fastening member.

  It is general to insert a fastening member in the penetration hole formed in each of a plurality of to-be-fastened bodies, in order to fasten a plurality of to-be-fastened bodies in the piled state. Moreover, when fastening in the state which piled up several to-be-fastened bodies in construction construction of a building, it may temporarily fasten with a temporary bolt etc. first and may finally fasten by this bolt etc after that. If the position of the through hole of each object to be fastened is deviated in such a fastening operation, it becomes difficult to properly insert the fastening member into the through hole. For this reason, in the conventional fastening operation, a drift pin is inserted into the through hole of each fastened object at a stage prior to temporary fastening (strictly speaking, at the time prior to temporary fastening after stacking a plurality of workpieces). An operation of aligning the positions between the through holes was performed (see, for example, Patent Document 1).

JP, 2011-117191, A

  However, in the case of using a drift pin, after the drift pin is inserted into the through hole of each fastened body and the through hole is aligned, the drift pin is removed from the through hole, and thereafter the penetrated of each fastened body A fastening member for temporary fastening will be inserted into the hole. If it is going to perform a fastening work in such a procedure, the effort of a work will be added. For this reason, it is required to perform the fastening operation more easily (in an easy-to-understand manner, with fewer steps).

  Then, this invention is made in view of said subject, and the place made into the objective provides the fastening member and fastening method which can fasten a plurality of piled to-be-fastened bodies more easily. It is to be.

  According to the fastening member of the present invention, the subject is a fastening member having a top and a shaft adjacent to the top, and used to fasten a plurality of objects to be fastened in a stacked state, the shaft A screw portion provided at a tip end portion of the portion and fastening the plurality of objects to be fastened by fitting with a fitting member after passing through a through hole formed in each of the plurality of objects to be fastened; A position which is provided at a portion farther from the tip of the shaft portion than the screw portion in the portion, and enters the through holes of each of the plurality of members to be fastened, thereby aligning the positions of the through holes between the through holes The tip of the shaft portion first passes through the through hole formed in the first object to be fastened among the through holes of each of the plurality of objects to be fastened, The farthest away from the first object in the direction in which the objects of the object are stacked Finally, the through hole formed in the object to be fastened passes through, the alignment portion enters into the through hole of each of the plurality of objects to be fastened, and the fitting member is engaged with the screw portion. In the state which is done, it is solved by the end close | similar to the front-end | tip of the said axial part being located in the said through hole of a said 2nd to-be-fastened body among the said alignment parts.

In the fastening member of the present invention configured as described above, a screw that fastens the plurality of to-be-fastened bodies by fitting with the fitting member after passing through the through holes formed in each of the plurality of to-be-fastened bodies And a positioning portion for aligning the positions of the through holes between the through holes by entering into the through holes of the respective objects to be fastened, provided at the shaft portion of one of the fastening members.
Further, in the fastening member of the present invention, in the state where the alignment portion is in the through hole of each object to be fastened and the fitting member is fitted to the screw portion, the shaft portion of the alignment portion The end closer to the tip is located in the through hole of the second body to be fastened (a through hole through which the tip of the shaft portion passes last among the through holes of the plurality of bodies to be fastened).
According to the above configuration, by inserting the fastening member of the present invention into the through holes of the respective to-be-fastened bodies, it becomes possible to fasten a plurality of to-be-fastened bodies while aligning the through holes. As a result, it is possible to more easily fasten a plurality of stacked objects to be fastened.

Moreover, if a suitable structure is described regarding said fastening member, the said alignment part will pass through the 1st opening provided in the said 1st to-be-fastened body, and will penetrate in the said through-hole of the said 1st to-be-fastened body The length of the portion passing through the first opening in the alignment portion is t, the sum of the thicknesses of the plurality of objects to be fastened is A, and the thickness of the second object to be fastened is B It is good for the following relation to hold.
A-B <t <A
If the above-mentioned relational expression is established, when the alignment part enters into the through hole of each object to be fastened and the fitting member is fitted to the screw part, the end of the alignment part (strictly speaking, The end closer to the tip end is located in the through hole of the second object to be fastened.

Further, to describe a suitable configuration regarding the above-mentioned fastening member, the cross sections of each of the screw portion and the alignment portion, which are orthogonal to the central axis of the shaft portion, are all circular, and the above-mentioned alignment portion The diameter of the cross section may be larger than the diameter of the cross section of the screw portion.
In the above configuration, since the screw portion closer to the tip of the shaft portion has a smaller diameter, the screw portion smoothly passes through the through holes of the respective objects to be fastened. Moreover, the alignment part further away from the front-end | tip of an axial part is larger diameter. For this reason, it becomes possible to match the position of a penetration hole appropriately between penetration holes because an alignment part enters into a penetration hole of each to-be-fastened body.

Further, to describe a still more preferable configuration regarding the above-mentioned fastening member, a taper portion is provided between the screw portion and the alignment portion, and the taper portion is directed to the tip of the shaft portion. It is preferable to have a shape that reduces the diameter.
According to the above configuration, since the tapered portion is provided between the screw portion and the alignment portion, the fastening member can be appropriately inserted into the through holes of the plurality of objects to be fastened.

Further, according to the fastening method of the present invention, the above-mentioned problem is a fastening method in which a plurality of objects to be fastened are fastened in a stacked state using a fastening member having a top and a shaft adjacent to the top. An alignment portion provided at a portion farther from the tip of the shaft than a screw provided at the tip of the shaft is inserted into a through hole formed in each of the plurality of members to be fastened Fitting the fitting member to the threaded portion after the threaded portion passes through the through holes of each of the plurality of objects to be fastened. And a step of fastening the plurality of objects to be fastened, wherein a tip of the shaft portion is formed in the first object to be fastened among the through holes of the plurality of objects to be fastened First passing through the hole, and in the direction in which the plurality of objects are stacked, the first The passage finally passes through the through hole formed in the second object to be fastened farthest from the body, the alignment portion enters into the through hole of each of the plurality of objects to be fastened, and the screw portion In the state in which the fitting member is fitted, the end of the alignment portion closer to the tip end of the shaft portion is located in the through hole of the second object to be fastened. Be done.
According to the above method, by inserting the fastening members into the through holes of the respective to-be-fastened bodies, it becomes possible to fasten a plurality of to-be-fastened bodies while aligning the positions of the through holes between the through holes. As a result, it is possible to more easily fasten a plurality of stacked objects to be fastened.

Moreover, if a suitable structure is described regarding said fastening method, after removing the said fastening member of the state which is fastening the said several to-be-fastened bodies from each of the said several to-be-fastened bodies The method may further include the step of fully fastening the body with the present fastening member.
According to the above method, in the case of temporarily fastening the plurality of to-be-fastened bodies prior to the final fastening of the plurality of to-be-fastened bodies by the fastening member, the plurality of through-holes are aligned It becomes possible to easily temporarily fasten the object to be fastened.

  According to the present invention, when fastening a plurality of stacked objects to be fastened, the fastening member of the present invention is inserted into the through holes of the objects to be fastened, while aligning the positions of the through holes with the through holes, It becomes possible to easily fasten a plurality of objects to be fastened.

It is a perspective view showing a plurality of to-be-fastened bodies concerning one embodiment of the present invention. It is a sectional view showing the state where a plurality of to-be-fastened bodies concerning one embodiment of the present invention were full-fastened. It is a sectional view showing the state where a plurality of to-be-fastened bodies concerning one embodiment of the present invention were temporarily fastened. It is a figure which shows the external appearance of the fastening member which concerns on one Embodiment of this invention. It is a figure which shows the magnitude correlation with the length of each part of the fastening member which concerns on one Embodiment of this invention, and each thickness of several to-be-fastened bodies. It is a figure which shows the application example regarding utilization of the fastening member which concerns on one Embodiment of this invention. It is a figure which shows the procedure of the fastening method which concerns on one Embodiment of this invention.

  Hereinafter, a fastening member and a fastening method according to an embodiment (hereinafter, the present embodiment) of the present invention will be described with reference to the drawings. However, the embodiment described below is an example for facilitating the understanding of the present invention, and does not limit the present invention. That is, the present invention can be modified and improved without departing from the spirit thereof. Also, of course, the present invention may include equivalents thereof.

  The fastening member and the fastening method according to the present embodiment are used, for example, to join ends of two steel frame beams adjacent to each other in a construction work of a building. Hereinafter, the use of the fastening member according to the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view of a beam joint structure constructed using a fastening member according to the present embodiment. FIG. 2 is a side cross-sectional view of the beam joint structure shown in FIG. 1 and is a view showing a state in which an end portion of a beam and a support plate are fully fastened. FIG. 3 is a view corresponding to FIG. 2 and is a side sectional view showing a state in which the end portion of the beam and the support plate are temporarily fastened.

  In the construction work of a building, the ends of two steel frame beams (hereinafter, beam ends 1) arranged to face each other are joined by a splice plate 2 which is a supporting plate as shown in FIG. More specifically, the splice plate 2 is mounted so as to straddle between the beam ends 1 on the upper surface of the upper flange 1 a of the pair of upper and lower flanges 1 a present in the beam end 1. Further, another splice plate 2 is arranged to straddle between the beam ends 1 at a position directly below the upper flange portion 1 a.

Similarly, the splice plate 2 is mounted on the upper surface of the lower flange portion 1a so as to straddle between the beam end portions 1 and another splice plate 2 is disposed at the position directly below the lower flange portion 1a. It is disposed so as to straddle between the units 1.
Further, at both side positions of the web portion 1 b existing at the beam end portion 1, the splice plate 2 is disposed so as to straddle between the beam end portions 1.

  As described above, each of the two beam ends 1 to be joined is sandwiched between the two splice plates 2. That is, each beam end 1 and the two splice plates 2 are stacked such that each beam end 1 is sandwiched between the splice plates 2. Then, each beam end 1 and the two splice plates 2 are bolted (fastened) in the above-described state, whereby the beam connection structure illustrated in FIG. 1 is constructed. That is, the beam end 1 and the two splice plates 2 correspond to a plurality of workpieces (specifically, three workpieces) to be fastened in the stacked state.

Next, a fastening structure according to the present embodiment will be described. In addition, below, the structure which fastens the upper flange part 1a which the beam end part 1 has, and the two splice plates 2 which clamp the said flange part 1a is mentioned as an example, and is demonstrated.
In addition, the contents described below can be applied to the case where the lower flange portion 1a and the two splice plates 2 are fastened, and the case where the web portion 1b and the two splice plates 2 are fastened. It is.

  As shown in FIGS. 2 and 3, through holes 1 h and 2 h are formed in each of the upper flange portion 1 a and the two splice plates 2. The through holes 1 h and 2 h are circular holes, and a plurality of through holes 1 h and 2 h are formed in each of the flange portion 1 a and the splice plate 2. In the present embodiment, the through holes 1 h formed in the flange portion 1 a and the through holes 2 h formed in the splice plate 2 have substantially the same diameter.

  Then, as shown in FIG. 2, high-strength bolts T (corresponding to the main fastening members) are inserted into the through holes 1h and 2h formed in the upper flange portion 1a and the two splice plates 2, respectively, and the bolt tips The nut N (corresponding to the fitting member) is screwed to the. Thus, the upper flange portion 1a and the two splice plates 2 are fully fastened.

  In the present embodiment, as can be seen from FIG. 2, the high-strength bolt T is first inserted into the through hole 2h formed in the lower splice plate 2 and then the through-hole formed in the upper flange portion 1a The holes 1 h are to be sequentially inserted into the through holes 2 h formed in the upper splice plate 2.

  By the way, in the present embodiment, before final fastening of the upper flange portion 1a and the two splice plates 2 using the high-strength bolt T, the upper flange portion 1a and the two splice plates 2 are It will be a temporary conclusion. As described above, by performing temporary fastening at a stage prior to the final fastening, the position of each object to be fastened (specifically, each of upper flange portion 1a and two splice plates 2) is set at a predetermined position. It becomes possible to fully fasten the to-be-fastened bodies together. More specifically, since the position between the to-be-fastened bodies is determined by the temporary fastening, it is possible to fasten the to-be-fastened bodies in a positioned state in the subsequent final fastening.

  The temporary bolt 10 corresponds to the fastening member of the present invention, and as shown in FIG. 3, is used to temporarily fasten the upper flange portion 1a and the two splice plates 2 in a stacked state. Specifically, the temporary bolt 10 is inserted into the through holes 1 h and 2 h of the upper flange portion 1 a and the two splice plates 2, and a nut N (corresponding to a fitting member) is screwed into the tip of the bolt. Thus, the upper flange portion 1a and the two splice plates 2 are temporarily fastened.

  The temporary bolt 10 is removed from each of the upper flange portion 1 a and the two splice plates 2 before final fastening of the upper flange portion 1 a and the two splice plates 2 with the high strength bolt T.

  In the present embodiment, the tip end of the temporary bolt 10 (strictly, the tip end of the shaft 10a) passes through the through hole 2h formed in the lower splice plate 2 first similarly to the high strength bolt T, and then It passes through the through hole 1 h formed in the upper flange portion 1 a and finally passes through the through hole 2 h formed in the upper splice plate 2. Here, the lower splice plate 2 corresponds to a first object to be fastened of the present invention, and the upper splice plate 2 corresponds to a second object to be fastened of the present invention. The relationship between the first object to be fastened and the second object to be fastened will be described in the direction in which the plurality of objects to be fastened are overlapped (specifically, the direction in which the upper flange portion 1a and the two splice plates 2 are overlapped) The to-be-fastened body most distant from the first to-be-fastened body in the vertical direction in this case is the second to-be-fastened body.

  Further, the lower end opening 2j of the through hole 2h formed in the lower splice plate 2 is an opening through which the tip end of the shaft portion 10a of the temporary bolt 10 first enters when passing into the through hole 2h. It corresponds to the first opening.

  Next, the configuration of the temporary bolt 10 according to the present embodiment will be described with reference to FIGS. 2 to 4. FIG. 4 is an external view of the temporary bolt 10. In the following description, “a cross section” means a cross section orthogonal to the central axis of the temporary bolt 10 (strictly speaking, the central axis of the shaft portion 10a described later) unless otherwise specified.

  The temporary bolt 10 has a structure similar to a half screw type hexagonal bolt, and is made of steel. The temporary bolt 10, as shown in FIG. 4, has a top 14 and a shaft 10a adjacent thereto. As shown in FIG. 4, the shaft portion 10 a has a screw portion 11, a taper portion 12 and an alignment portion 13 in order from the tip thereof.

  The screw part 11 is a part provided in the front-end | tip part of the axial part 10a, as shown in FIG. 4, The cross section becomes circular shape. In addition, a helical thread is formed on the outer peripheral surface of the screw portion 11. Then, the tip end portion of the screw portion 11 is fitted with the nut N (corresponding to the fitting member) after passing through the upper flange portion 1a and the through holes 1h and 2h of the two splice plates 2 respectively. Thereby, the upper flange portion 1a and the two splice plates 2 are temporarily fastened. Further, the diameter of the threaded portion 11 is much smaller than the diameters of the through holes 1 h and 2 h of the upper flange portion 1 a and the two splice plates 2.

The taper part 12 is a part provided in the temporary bolt 10 between the screw part 11 and the alignment part 13 as shown in FIG. 4, The cross section is circular shape. Moreover, the taper part 12 has comprised the shape that diameter becomes small as it goes to the front-end | tip of the axial part 10a.
The above taper part 12 is interposed between the screw part 11 and the alignment part 13 which are different in diameter from each other, whereby the temporary bolt 10 is penetrated through the upper flange part 1 a and the two splice plates 2. It is possible to insert the holes 1 h and 2 h properly. Specifically, when the position of one hole is shifted when inserting the temporary bolt 10 into each through hole 1 h, 2 h, the boundary portion between the alignment portion 13 and the screw portion 11 becomes the tapered portion 12 If it does, it will become difficult for the said boundary part to get caught in the edge part of the through holes 1h and 2h.

  As shown in FIG. 4, the alignment portion 13 is provided in the shaft portion 10 a at a portion farther from the tip of the shaft portion 10 a than the screw portion 11 and adjacent to the taper portion 12 on the opposite side to the screw portion 11. There is. Further, the alignment unit 13 has a cylindrical shape. That is, the cross section of the alignment unit 13 is circular. Furthermore, the diameter of the cross section of the alignment portion 13 is larger than the diameter of the cross section of the screw portion 11, and slightly smaller than the diameters of the through holes 1h and 2h of the upper flange portion 1a and the two splice plates 2 respectively. Is getting smaller.

  Then, as shown in FIG. 3, the alignment portion 13 enters the through holes 1 h and 2 h of the upper flange portion 1 a and the two splice plates 2. Specifically, the alignment portion 13 first enters the through hole 2 h formed in the lower splice plate 2, and thereafter, in the through hole 1 h formed in the upper flange portion 1 a, the upper splice The through holes 2 h formed in the plate 2 sequentially enter. At this time, if there are through holes 1 h and 2 h shifted from the normal position, the alignment unit 13 abuts on the inner peripheral surfaces of the through holes 1 h and 2 h to correct the position. As a result, the positions of the through holes 1h and 2h are matched between the through holes 1h and 2h, and the through holes 1h and 2h are connected to form a straight tubular communication hole. As a result, when the main fastening is performed after the temporary fastening, the high strength bolt T is smoothly inserted into the through holes 1 h and 2 h of the upper flange portion 1 a and the two splice plates 2.

  The top portion 14 is a head portion of the temporary bolt 10 and, as shown in FIG. 4, is adjacent to the alignment portion 13 on the side opposite to the side where the screw portion 11 is located. The top 14 of the present embodiment is in the shape of a hexagonal column. That is, the end face of the top portion 14 closer to the bolt tip (hereinafter, the lower end surface of the top portion 14) has a hexagonal shape. The lower end surface of the top portion 14 can be locked to the edge portion of the lower end opening 2 j (first opening) of the through hole 2 h formed in the lower splice plate 2. That is, when the temporary bolt 10 is inserted into the through holes 1 h and 2 h of the upper flange portion 1 a and the two splice plates 2, finally, the top 14 is the upper splice plate 2 (strictly, the through holes 2 h Will be locked to the edge). As a result, the temporary bolt 10 is maintained in the state of being inserted into the through holes 1 h and 2 h without coming out of the through holes 1 h and 2 h.

  The temporary bolt 10 configured as described above is inserted into the upper flange portion 1a and the through holes 1h and 2h of the two splice plates 2 by providing the screw portion 11 at the tip end portion thereof. , Demonstrate the function of temporarily fastening these members. That is, the tip end portion of the screw portion 11 passes through the through holes 1 h and 2 h and finally protrudes upward from the upper end opening 2 k of the through hole 2 h formed in the upper splice plate 2. Then, by fitting (strictly, screwing) the nut N to the exposed end portion of the screw portion 11, the upper flange portion 1a and the two splice plates 2 are temporarily fastened.

  In the present embodiment, the diameter of the screw portion 11 is smaller than the diameter of the through holes 1 h and 2 h of the upper flange portion 1 a and the two splice plates 2 by one turn or more. For this reason, when inserting temporary bolt 10 in each penetration hole 1h and 2h, screw part 11 comes to pass each penetration hole 1h and 2h smoothly.

  Furthermore, in the present embodiment, by providing the alignment portion 13 in the temporary bolt 10, the temporary bolt 10 exhibits the same function as the drift pin. That is, when the alignment portion 13 enters the through holes 1 h and 2 h of the upper flange portion 1 a and the two splice plates 2, the positions of the through holes 1 h and 2 h are aligned between the through holes 1 h and 2 h. Thus, the temporary bolt 10 according to the present embodiment has an alignment function of the through holes 1 h and 2 h, together with the original function of temporarily fastening the upper flange portion 1 a and the two splice plates 2. In other words, if the temporary bolt 10 is used, the positions of the through holes 1h and 2h of the upper flange portion 1a and the two splice plates 2 can be aligned without using the drift pin, and at the same time, the upper side It is possible to temporarily fasten the flange portion 1a and the two splice plates 2.

  In the present embodiment, the dimensions of each part of the temporary bolt 10 are set in consideration of the thicknesses of the flange portion 1 a and the splice plate 2 in order for the temporary bolt 10 to exhibit the above-described function. Hereinafter, the dimensions of each part of the temporary bolt 10 will be described with reference to FIG. FIG. 5 is a diagram showing the magnitude relationship between the length of each part of the temporary bolt 10 and the thickness of each object to be fastened (specifically, the flange portion 1a and the splice plate 2).

When the total of the lengths of the screw portion 11, the taper portion 12 and the alignment portion 13 in the temporary bolt 10 is L, as shown in FIG. 5, L is satisfied so as to satisfy the following relational expression (1). Is set.
A <L (1)
Here, A is the thickness of each of a plurality of workpieces to be fastened (strictly, temporarily fastened) by the temporary bolt 10, specifically, the upper flange portion 1a and the two splice plates 2 (vertical direction The sum of

Further, a portion of the alignment portion 13 of the temporary bolt 10 that passes through the lower end opening 2j of the through hole 2h provided in the lower splice plate 2 and enters the through holes 1h and 2h (hereinafter referred to as an opening passing portion When the length of t) is t, as shown in FIG. 5, t is set so as to satisfy the following relational expression (2).
A-B <t <A (2)
Here, B is the thickness of the upper splice plate 2 (that is, the second object to be fastened).

In the present embodiment, since the entire alignment unit 13 corresponds to the opening passage portion, when the total length of the alignment unit 13 is d, the above relational expression (2) is expressed as follows: .
AB <d <A (2A)

On the other hand, the length t of the opening passing portion in the alignment portion 13 can be changed, for example, by arranging an adjusting tool such as a washer W between the top portion 14 and the lower splice plate 2 as shown in FIG. is there. FIG. 6 is a view showing a case in which the length t of the opening passing portion of the alignment portion 13 is adjusted using the washer W as an application example regarding the use of the temporary bolt 10. In this case, the length t of the opening passing portion of the alignment portion 13 is from the total length d of the alignment portion 13 to the thickness r of the washer W (strictly, the thickness per washer W is multiplied by the number of used washers W The value obtained by subtracting the Therefore, when the length t of the opening passing portion of the alignment portion 13 is adjusted using the washer W, the above relational expression (2) is expressed as follows.
A-B <d-r <A (2B)

  In the present embodiment, the above relational expression is established. Thus, when the temporary bolt 10 is inserted into the through holes 1 h and 2 h of the upper flange portion 1 a and the two splice plates 2, the alignment portion 13 enters the through holes 1 h and 2 h and the tip of the screw portion 11 A portion projects from the upper end opening 2 k of the through hole 2 h formed in the upper splice plate 2.

  Then, the nut N is fitted to the tip end portion of the screw portion 11, whereby the upper flange portion 1a and the two splice plates 2 are temporarily fastened. At this time, as shown in FIG. 5, the end of the alignment portion 13 closer to the tip end of the shaft portion 10a is located in the through hole 2h of the upper splice plate 2. Thereby, in a state where upper flange portion 1a and two splice plates 2 are temporarily fastened, the positions of through holes 1h and 2h formed in each of these members are set between alignment holes 13 between through holes 1h and 2h. Aligned (aligned).

  Next, a procedure for fastening the upper flange portion 1a and the two splice plates 2 will be described with reference to FIG. FIG. 7 is a view showing a procedure for fastening the upper flange portion 1 a and the two splice plates 2.

  In the present embodiment, the upper flange portion 1a and the two splice plates 2 are fastened using the fastening method of the present invention. In other words, steps S001 to S005 described below correspond to elements constituting the fastening method of the present invention.

  In order to fasten the upper flange portion 1a and the two splice plates 2 in the present embodiment, first, the temporary bolts 10 are inserted into the through holes 1h and 2h of the flange portion 1a and the two splice plates 2 in the overlapped state. Is inserted (S001). At this time, the tip end of the temporary bolt 10 (strictly, the tip end of the shank 10a) first enters the through hole 2h from the lower end opening 2j of the through hole 2h formed in the lower splice plate 2 and then And into the through hole 1 h formed in the upper flange portion 1 a and finally into the through hole 2 h formed in the upper splice plate 2.

  When the insertion of the temporary bolt 10 proceeds, the alignment portion 13 of the temporary bolt 10 eventually enters the upper flange portion 1a and the through holes 1h and 2h of the two splice plates 2 (S002). As a result, the positions of the through holes 1 h and 2 h can be aligned between the through holes 1 h and 2 h. That is, step S 002 corresponds to a step of aligning the through holes 1 h and 2 h by inserting the alignment portion 13 into the through holes 1 h and 2 h of the upper flange portion 1 a and the two splice plates 2. .

Then, with the further insertion of the temporary bolt 10, the tip end portion (that is, the tip end portion of the screw portion 11) protrudes from the upper end opening 2k of the through hole 2h formed in the upper splice plate 2; The nut N is fitted to the tip portion of the (S003). Thus, the upper flange portion 1 a and the two splice plates 2 are temporarily fastened by the temporary bolt 10.
In the present embodiment, a plurality of temporary bolts 10 are used to temporarily fasten the upper flange portion 1a and the two splice plates 2.

  In addition, at the time when the temporary fastening is completed (that is, when the step S003 ends), the alignment portion 13 enters the through holes 1h and 2h of the upper flange portion 1a and the two splice plates 2 and screws A nut N is fitted to the portion 11. Furthermore, in this state, the end of the alignment portion 13 closer to the tip of the temporary bolt 10 (that is, the tip of the shaft 10a) is located in the through hole 2h of the upper splice plate 2.

After temporary fastening, the upper flange portion 1a and the two splice plates 2 are fully fastened using a high strength bolt T (S004). Specifically, the temporary bolts 10 in a state of temporarily fastening the upper flange portion 1a and the two splice plates 2 are removed from each of the upper flange portion 1a and the two splice plates 2 one by one. Then, every time the temporary bolt 10 is removed, the high strength bolt T is inserted into the place where the temporary bolt 10 is removed, and the nut N is fitted to the tip of the high strength bolt T. By repeating this operation, when all the temporary bolts 10 are replaced by the high strength bolts T, the upper flange portion 1a and the two splice plates 2 are fully fastened by the high strength bolts T.
Then, when the above-described series of steps are completed, the operation of fastening the upper flange portion 1a and the two splice plates 2 is completed.

  As described above, in the present embodiment, by using the temporary bolt 10, while the through holes 1h and 2h formed in each of the upper flange portion 1a and the two splice plates 2 are aligned, the upper flange portion is performed. It is possible to temporarily fasten 1a and two splice plates 2. As a result, it is possible to temporarily fasten the upper flange portion 1a and the two splice plates 2 more easily than the conventional fastening method.

To explain clearly, in the conventional fastening method, after the through holes 1h and 2h are aligned by the drift pins, the drift pins are removed from the through holes 1h and 2h, and thereafter the upper flange portion 1a is formed using temporary bolts. And two splice plates 2 were temporarily fastened.
On the other hand, in the present embodiment, by using the temporary bolt 10, the through holes 1h and 2h can be aligned without using a drift pin, and further, the upper flange portion 1a and the two splice plates 2 It is also possible to temporarily conclude the As a result, in the present embodiment, since the drift pin is not used, it is possible to save time and effort of the work as compared with the conventional fastening method.

Up to this point, the fastening member and the fastening method of the present invention have been described by way of an example. However, the above-described embodiment is merely an example, and other embodiments are also conceivable. For example, in the above embodiment, the flange portion 1a or the web portion 1b of the beam end portion 1 and the two splice plates 2 sandwiching it are fastened by the fastening member (specifically, the temporary bolt 10) of the present invention I decided. That is, in the above-mentioned embodiment, although the case where it fastens in the state where three to-be-joined bodies were piled up was mentioned as an example and explained, it is not limited to this. The number of objects to be joined can be set arbitrarily.
Further, the type of the object to be joined is not particularly limited, and the fastening member and the fastening method of the present invention can be used also when fastening objects other than the beam end 1 and the splice plate 2 is there.

1 Beam end (clamped body)
1a Flange portion 1b Web portion 1h Through hole 2 Splice plate (object to be fastened)
2h through hole 2j lower end opening (first opening)
2k upper end opening 10 temporary bolt (fastening member)
10a Shaft 11 Threaded portion 12 Tapered portion 13 Alignment portion 14 Top N Nut (fitting member)
T High-strength bolt (fastening member)
W washer

Claims (6)

A fastening member having a top and a shaft adjacent to the top, the fastening member being used to fasten a plurality of workpieces in a stacked state,
A screw portion provided at a tip end of the shaft portion and engaged with a fitting member after passing through a through hole formed in each of the plurality of members to be fastened, thereby fastening the plurality of members to be fastened;
The shaft portion is provided at a portion farther from the tip of the shaft portion than the screw portion, and enters the through holes of each of the plurality of objects to be fastened, thereby positioning the through holes between the through holes. And an alignment unit to align
The tip end of the shaft portion first passes through the through hole formed in the first object to be fastened among the through holes of each of the plurality of objects to be fastened, and the plurality of objects to be fastened are overlapped. Finally passing through the through hole formed in the second object to be fastened farthest from the first object to be fastened in the direction,
In the state where the alignment portion is in the through hole of each of the plurality of members to be fastened, and the fitting member is fitted in the screw portion, the shaft portion of the alignment portion A fastening member characterized in that an end closer to a tip end of the second fastening member is located in the through hole of the second object to be fastened. The alignment portion passes through a first opening provided in the first object to be fastened and enters the through hole of the first object to be fastened;
In the alignment portion, the length of a portion passing through the first opening is t, the sum of the thicknesses of the plurality of objects to be fastened is A, and the thickness of the second object is B The fastening member according to claim 1, wherein the following relational expression is established.
A-B <t <A The cross sections of each of the screw portion and the alignment portion orthogonal to the central axis of the shaft portion are all circular,
The fastening member according to claim 2, wherein a diameter of the cross section of the alignment portion is larger than a diameter of the cross section of the screw portion. A tapered portion is provided between the screw portion and the alignment portion,
The fastening member according to claim 3, wherein the tapered portion is shaped such that the diameter decreases toward the tip of the shaft portion. A fastening method of fastening a plurality of objects to be fastened in a stacked state by using a fastening member having a top and a shaft adjacent to the top,
The alignment portion provided at a portion farther from the tip of the shaft than the screw provided at the tip of the shaft is inserted into the through hole formed in each of the plurality of members to be fastened. Aligning the positions of the through holes between the through holes;
After the screw portion passes through the through hole of each of the plurality of objects to be fastened, fitting a fitting member to the screw portion to fasten the plurality of objects to be fastened;
The tip end of the shaft portion first passes through the through hole formed in the first object to be fastened among the through holes of each of the plurality of objects to be fastened, and the plurality of objects to be fastened are overlapped. Finally passing through the through hole formed in the second object to be fastened farthest from the first object to be fastened in the direction,
In the state where the alignment portion is in the through hole of each of the plurality of members to be fastened, and the fitting member is fitted in the screw portion, the shaft portion of the alignment portion And a second end of the second object to be fastened is located in the through hole of the second object.   After removing the fastening member in a state of fastening the plurality of objects to be fastened from each of the plurality of objects to be fastened, the method further includes a step of fully fastening the plurality of objects to be fastened by the fastening member. The fastening method according to claim 5, characterized in that

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