Temporary fixing pin and temporary fixing method using the same

Abstract

To safely, surely and quickly perform temporary fixing work of a fastened body while reducing a burden of a worker.SOLUTION: This temporary fixing pin P is composed of a body pin 1, a locking member 2, a spring member 3, a driving member 4, an operation member 5 and a fixing member 6. By inserting the body pin 1 between the through-holes of the plurality of fastened bodies from the tip, the locking member 2 is engageably projected to the peripheral edge of the through-hole of the fastened body at one end on the tip side of the body pin 1, and the fixing member 6 of the body pin 1 is attracted and fixed to the periphery of the through-hole of the fastened body at the other end, so that the plurality of fastened bodies are temporarily fixed between the locking member 2 and the fixing member 6.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a temporary fastening pin used to temporarily fasten multiple fastened objects together when multiple fastened objects are stacked and fastened together using fastening members, such as when the ends of two steel beams are sandwiched between splice plates and fastened by passing bolts through the through holes drilled in each plate, and a temporary fastening method using the pin. [Background technology]

[0002] In the construction of steel-reinforced concrete and steel-framed building structures, steel frames manufactured in factories are transported to the construction site, hoisted using heavy machinery, and bolted together to form columns and beams, a process known as steel frame erection. When attaching beams to column joints in this steel frame erection process, the beams are suspended between the column joints, splice plates are attached between the column joints and the beams, and bolts are inserted through holes drilled in the joints, beams, and splice plates, and nuts are tightened onto the bolts to fasten the beams to the joints. Furthermore, when constructing earth retaining walls, beams are sometimes connected to support sheet piles, etc. In this case, the beams are fastened together by sandwiching the ends of the beams between splice plates, passing bolts through the holes drilled in each, and tightening nuts.

[0003] H-beams and I-beams are generally used for these beams. These steel materials are usually transported to the construction site by trailer over public roads, so the length of the beams is limited to about 15.0 m for transportation purposes, and most beams required for construction are longer than this, so the steel materials must be joined (connected) together at the construction site.

[0004] This type of joint is typically performed manually by clamping the ends of the steel members to be joined between splice plates and fastening them with bolts through pre-drilled through-holes in each plate.

[0005] Figure 9 shows an example of a conventional process for joining two steel materials, in this case, two H-shaped steel beams, and particularly illustrates a case in which the upper and lower flanges F1, F2 at the end of one H-shaped steel beam and the upper and lower flanges F1, F2 at the end of the other H-shaped steel beam are fastened together with bolts B and nuts N via a plurality of splice plates S1, S11, S21, S2. Note that the end of one H-shaped steel beam and the end of the other H-shaped steel beam to which it is joined each have multiple through holes drilled as bolt holes in the upper and lower flanges F1, F2 and web W, and each of the splice plates S1, S11, S21, S2 used to join these H-shaped steel beams also has multiple through holes drilled therein corresponding to the multiple bolt holes in the H-shaped steel beams.

[0006] In this procedure, as shown in Figure 9(1), the upper splice plate S1 and the lower splice plate S11 are first placed between the ends of the two H-shaped steel beams, spanning the top surfaces of the upper flange F1 and the top surfaces of both sides of the web W of the lower flange F2. The splice plates S1 and S11 are then placed on the flanges F1 and F2, with their respective through holes S10, F10, S110, F20 aligned. Then, bolts B are inserted from above the splice plate S11 into one or more of the through holes S110, F20 between the lower splice plate S11 and the lower flange F2, positioning the lower splice plate S11 on the lower flange F2.

[0007] Next, as shown in Figure 9(2), the upper and lower splice plates S21 and S2 are placed between the ends of the two H-shaped steel beams, spanning the undersides of the web W of the upper flange F1 and the underside of the lower flange F2, with their through holes S210, F10, S20, and F20 aligned. Then, bolts B are inserted into the through holes S210, F10, S10, S110, F20, and S20 between the upper and lower splice plates S1, S21, S11, and S2 and between the flanges F1 and F2, and nuts N are tightened. At this time, the lower splice plates S21 and S2 are lifted with both hands and placed on the undersides of the flanges F1 and F2, aligning their through holes S210, F10, S20, and F20. Then, from this state, bolts B are inserted into the through holes S210, F10, S10, S110, F20, and S20 between the splice plates S1, S21, S11, and S2 and the flanges F1 and F2, and nuts N are tightened onto the bolts B. In this case, between each of the upper lower splice plates S21 and the flange F1, while supporting the lower splice plate S21 with one hand, bolts B are inserted from below the splice plate S21 into the through holes S210, F10, and S10 between the lower splice plate S21, flange F1, and the upper splice plate S1 with the other hand, and then, while supporting the lower splice plate S21 with the other hand, bolts B are pressed down and nuts N is tightened onto the bolts B with one hand. Also, even when the lower splice plate S2 is between the lower splice plate S2 and the flange F2, while supporting the lower splice plate S2 with one hand, the bolt B that has been passed through the through holes S110 and F20 between the upper splice plate S11 and the flange F2 from above the upper splice plate S11 is passed through the through hole S20 of the lower splice plate S2, and while supporting the lower splice plate S2 with one hand, the nut N is tightened onto the bolt B with the other hand.

[0008] As described above, this operation requires manual support of the lower splice plates S21 and S2 until the bolts B and nuts N are tightened to a certain extent and the upper and lower splice plates S1, S21, S11, and S2 are securely attached to the upper and lower flanges F1 and F2. This means that the lower splice plates S21 and S2 cannot be released from their grip. The weight of the splice plates used in this type of construction ranges from 5 kg to 100 kg or more, with the most commonly used ones weighing around 30 kg. Therefore, as mentioned above, this operation requires the operator to support and hold down the heavy splice plates with one hand until the bolts and nuts are fastened, making it extremely difficult and laborious. Furthermore, when turning the bolts and nuts, they sometimes rotate together, preventing the fastening. This raises the risk of the splice plates being dropped, and safety improvements are desirable.

[0009] To assist in such work, Patent Document 1 proposes temporary bolts used to temporarily fasten steel beams together, and a method for temporarily fixing steel beams using these temporary bolts.

[0010] The temporary bolt of Document 1 comprises a cylindrical main body having a tapered tip, a nut provided on the threaded portion at the base end of the main body, and a protruding member disposed in a hole formed at a position spaced apart from the nut.

[0011] Looking specifically at the protrusion member, its maximum axial length is shorter than the length of the hole. The radially outer end of the protrusion member has an inclined surface cut out at different inclinations on both sides. This inclined surface protrudes radially outward from the opening of the hole, and the protrusion is positioned in the hole so that its protruding length is longer at the base end of the body and shorter at the tip end. A recess is formed at the rear end of the axial side of the protrusion member. A spring is fixed between the side wall of the hole and the recess of the protrusion member. Furthermore, a rounded rectangular groove is formed on one side of the protrusion member, and this groove extends in the axial direction of the protrusion member. A stopper pin is then driven into the groove of the protrusion member from outside the body of the temporary bolt and fixed so as to engage with it. The protrusion member is movable while being guided in the groove by the stopper pin and is pressed radially outward by the spring.

[0012] When fastening two steel beams using these temporary bolts, the top flanges, bottom flanges, and webs of the two steel beams are aligned, and both surfaces of the top flanges, bottom flanges, and web are sandwiched between splice plates. The splice plate has multiple fixing holes at positions that align with the fixing holes formed in the top flanges, bottom flanges, and web. First, the top flange and bottom flange of one of the two steel beams to be connected are temporarily fastened using center bolts, as in the conventional method. Then, the webs of the two steel beams and the top flange and bottom flange of the remaining steel beam are temporarily fastened using temporary bolts. This temporary fastening method using temporary bolts is the same for the web and the top flange and bottom flange of the other steel beam.

[0013] In the case of a web, first align the fixing holes in the web into which the temporary bolts are inserted with the fixing holes in the splice plates that sandwich the web. Next, rotate the nut threaded onto the threads of the temporary bolt to adjust the length from the base end face of the hole to the tip end face of the nut to a length corresponding to the thickness of the web and two splice plates. Then, press the protruding members of the temporary bolts toward the center to prevent them from coming out of the holes. Next, insert the temporary bolts from one splice plate into the aligned fixing holes in the web and splice plates. When the temporary bolts pass through the fixing holes, the spring force pushes the protruding members outward radially. This causes the base end portions of the protruding members to abut against the side of the splice plate, preventing them from retracting into the fixing holes. Since the temporary bolts penetrate the web and splice plates and cannot be removed, the web and two splice plates are temporarily secured with the fixing holes aligned.

[0014] Thereafter, when removing the temporary bolt to fix it with a high-strength bolt, the protruding member is pressed toward the center (into the hole) and pulled out in the direction opposite to the insertion direction.

[0015] In this way, temporary fastening of steel beams can be carried out efficiently. [Prior art documents] [Patent documents]

[0016] [Patent Document 1] Patent Publication No. 2021-162077 Summary of the Invention [Problem to be solved by the invention]

[0017] However, due to the structure of the temporary bolt in Patent Document 1, the temporary fastening method using this temporary bolt has the following problems. (1) The body of this temporary bolt is passed through the through-holes of the steel frame and the splice plates on both sides, and the nuts and protrusions sandwich the steel frame and the splice plates on both sides. Therefore, as mentioned above, when using it to join two H-shaped steels, as shown in Figure 9 (2), the lower splice plate is placed between the ends of the two H-shaped steels, spanning the undersides of the webs on both sides of the upper flange, and spanning the underside of the lower flange, and the temporary bolts are inserted and fixed into the multiple through-holes between the upper and lower flanges and the splice plates on both sides. For each of the upper and lower flanges, the lower splice plate is lifted with both hands, and the splice plate is placed on the underside of the flange while aligning the through-holes between the splice plate and the flange, and from this state, the temporary bolts are inserted into the through-holes between the splice plate and the flange. However, in this case, between the upper flange and splice plate, it is necessary to hold the lower splice plate with one hand while inserting a bolt from the through-hole of one splice plate through the through-hole of the flange and into the through-hole of the other splice plate with the other hand, and during this time, it is necessary to hold the lower splice plate with one hand.As mentioned above, the splice plate is very heavy, so the work is inevitably extremely difficult. (2) In this temporary bolt, the protruding member is arranged on the tip side of the main body via a spring and protrudes from the opening on the tip side peripheral surface of the main body. Therefore, when inserting the temporary bolt into each through hole of the splice plate or the steel frame, the protruding member is pressed against the inner peripheral edge and inner surface of the through hole and is pulled into the main body, allowing the temporary bolt to be inserted into each through hole of the splice plate or the steel frame. However, when removing the temporary bolt from the through hole of the splice plate or the steel frame, the protruding member must be manually pressed toward the center (into the hole) and pushed back, making it difficult to remove the temporary bolt from the through hole of the splice plate or the steel frame. (3) Generally, in order to make it easier to insert temporary bolts into the through holes of the splice plate or flange, the diameter of each through hole is made slightly larger than the diameter of the temporary bolt to provide some clearance. However, in the case of this temporary bolt, the protruding member is arranged at the tip side of the main body via a spring and is designed to protrude from the opening on the peripheral surface of the tip side of the main body. Therefore, if there is some misalignment between the through holes of the splice plate and the steel frame, and a gap occurs between the through holes, the protruding member of this temporary bolt may protrude toward the gap and get caught in the gap, making it impossible to pull out the temporary bolt from the through hole.

[0018] The present invention solves these conventional problems by providing a temporary fastening pin and a temporary fastening method using the same, which are used to temporarily fasten multiple fastened objects together when multiple fastened objects are stacked and fastened together using fastening members, such as when the ends of two steel beams are sandwiched between splice plates and fastened by passing bolts through the through holes drilled in each plate.The purpose of the present invention is to provide a temporary fastening method using the same, which enables the temporary fastening of multiple fastened objects to be carried out safely, reliably, and quickly while reducing the physical burden on workers. [Means for solving the problem]

[0019] In order to achieve the above object, the present invention (1) provides: A temporary fastening pin is inserted into a plurality of through holes drilled between a plurality of fastened bodies by overlapping the plurality of fastened bodies, and temporarily fastens the plurality of fastened bodies, a hollow cylindrical main body pin that can be inserted through the through holes of the plurality of fastened bodies; a locking member disposed on the tip side of the main pin so as to be able to protrude and retract in the radial direction of the main pin, and capable of engaging with the periphery of a through hole in one of the workpieces at one end which is the insertion end of the temporary fastening pin in the workpieces; a spring member disposed within the main body pin and biasing the locking member in a direction in which the locking member protrudes from the main body pin; a driving member disposed within the main body pin and configured to drive the locking member in a direction to be inserted into the main body pin; an operating member disposed on a base end side of the main body pin for operating the drive member; a fixing member consisting of a magnet that is arranged and fixed on the circumferential surface of the main pin at a position spaced from the retracted position of the locking member toward the base end of the main pin by a dimension equivalent to the thickness of the plurality of fastened bodies, and that can be attracted and fixed by magnetic force to the periphery of a through hole in the fastened body at the other end, which is the insertion starting point of the temporary fastening pin, among the plurality of fastened bodies; Equipped with By inserting the main body pin from its tip through the through holes of the multiple fastened bodies, the locking member protrudes at the tip side of the main body pin so as to be able to engage with the periphery of the through hole of the fastened body at one end, and the fixing member of the main body pin is adsorbed and fixed to the periphery of the through hole of the fastened body at the other end, temporarily fixing the multiple fastened bodies between the locking member and the fixing member, By operating the operating member, the locking member is immersed in the main body pin, and the main body pin can be pulled out from the through holes of the plurality of fastened bodies. The gist of this is as follows.

[0020] It is also preferable that each part of the temporary fastening pin has the following configuration. (1) The locking member has a locking portion at one end that can engage with the periphery of the through hole of the object to be fastened at one end, and a bearing at the other end, an opening is formed on the circumferential surface of the tip side of the main pin, and bearings are formed on both sides of the opening, the locking member is disposed inside the tip side of the main pin, a pivot shaft is inserted between the bearing of the locking member and the bearing of the main pin, and the locking portion is attached so as to be rotatable between a position where it is immersed in the opening and a position where it protrudes outside the opening, the drive member is a shaft, and is inserted into the main pin so as to be drivable in the axial direction of the main pin, and one end of the drive member is operatively connected to the locking member so as to drive the locking portion of the locking member in a direction to retract into or protrude from the opening at the tip side of the main pin; the spring member is a coil spring and is disposed within the main body pin so as to be biased in a direction in which the locking portion of the locking member protrudes or retracts into the opening at the tip end of the main body pin when the drive member is in a normal state; the operating member is of a lever type and is operatively connected to the other end of the driving member, and is attached to the base end side of the main body pin so as to be able to drive the driving member; The fixing member has a magnetic force necessary to fix the main body pin inserted into the through hole of the multiple fastened bodies to the fastened body at the other end of the multiple fastened bodies. (2) In particular, the operating member comprises a handle fixed to the base end of the main pin and extending radially from the main pin, and a lever rotatably attached to one end of the handle on the main pin side and operatively connected to the other end of the drive member. The operating member may also consist of a ring-shaped handle fixed to the base end of the main pin, and a lever arranged within the ring of the handle so as to be movable in the pulling direction relative to the base end of the main pin and operatively connected to the other end of the drive member. (3) In particular, the fixing member comprises a magnet body arranged on the circumferential surface of the main body pin so as to be movable in the axial direction of the main body pin, and a magnet body positioning fixing member integrally formed on the magnet body and capable of fixing the magnet body at any position on the circumferential surface of the main body pin. In this case, it is desirable that the magnet body positioning and fixing member be integrally formed on the surface opposite to the adsorption surface for the object to be fastened at the other end of the magnet body, and consist of a pair of clamps that can be tightened to the circumferential surface of the main body pin, and bolts and nuts that can be tightened between each of the clamps. In addition, the main body pin may have a thread on its peripheral surface, and the magnet main body positioning and fixing member may be integrally formed on the surface opposite to the adsorption surface for the object to be fastened at the other end of the magnet main body, and may consist of a cylindrical socket that can be fitted onto the peripheral surface of the main body pin and has a threaded portion that can be screwed onto the thread of the main body pin.

[0021] In order to achieve the above object, the present invention (2) provides: A temporary fastening method in which an upper splice plate is placed on the upper surface of the upper flange and an upper splice plate is placed on the upper surface of the lower flange, spanning the upper surfaces of the upper flanges and the upper surfaces of both sides of the web of the lower flange, between the ends of two shaped steels such as H-shaped steel or I-shaped steel, and then a lower splice plate is placed on the lower surface of each of the upper and lower flanges, and a temporary fastening member such as a bolt is inserted into one or more of a plurality of through holes between each of the upper and lower splice plates and each of the flanges to temporarily fasten them together, The temporary fastening pin is used for the temporary fastening member, For each of the upper and lower flanges, before the lower splice plate is superimposed on the lower surface of the flange, the temporary fastening pin is inserted into the through-hole between the upper splice plate and the flange, and the fixing member of the temporary fastening pin and the upper splice plate are attracted and fixed by magnetic force, After the temporary fastening pin is fixed on the through hole between the upper splice plate and the flange, the lower splice plate is lifted with both hands and placed on the underside of the flange. From this state, the temporary fastening pin is inserted from the tip side into the through hole of the lower splice plate, and the tip side of the main pin is engaged with the locking member on the periphery of the through hole of the lower splice plate, thereby temporarily fixing the flange and each of the splice plates on both sides thereof between the fixing member and the locking member. When removing this temporary fastening pin from the flange and each of the splice plates on both sides thereof, the operating member is operated to push the locking member toward the tip side of the main pin, and the main pin is pulled out from the through holes of the flange and each of the splice plates on both sides thereof.

[0022] Furthermore, in order to achieve the above object, the present invention (3) provides: A temporary fastening method in which two splice plates are placed between the ends of two shaped steel beams, such as H-shaped steel or I-shaped steel beams, spanning both sides of the webs of both beams, and then temporary fastening members such as bolts are inserted into one or more of a plurality of through holes between each splice plate and the web. The temporary fastening pin is used for the temporary fastening member, Before overlapping each splice plate on both sides of the web, lift one of the splice plates with both hands and overlap it on one side of the web. While holding this state, insert the temporary fastening pin into the through-hole between one of the splice plates and the web, and magnetically attract and fix the fixing member of the temporary fastening pin to one of the splice plates. After the temporary fastening pin is fixed onto the through-hole between one of the splice plates and the web, the other of the splice plates is lifted with both hands and placed on the other side of the web. From this state, the temporary fastening pin is inserted from the tip side into the through-hole of the other of the splice plates, and the tip side of the main pin is engaged with the locking member on the periphery of the through-hole of the other of the splice plates, thereby temporarily fixing the web and each of the splice plates on both sides between the fixing member and the locking member. When removing the temporary fastening pin from the web and each of the splice plates on both sides thereof, an operating member is operated to retract the locking member into the tip side of the main body pin, and the main body pin is pulled out from the through holes of the web and each of the splice plates on both sides thereof. The gist of this is as follows. [Effects of the Invention]

[0023] The temporary fastening pin and the temporary fastening method using the same of the present invention, with the above-mentioned configuration, have the unique and exceptional effect of enabling the temporary fastening work of multiple fastened objects to be carried out safely, reliably, and quickly while reducing the physical burden on workers, when multiple fastened objects are stacked on top of each other and fastened with fastening members, such as when the ends of two steel beams are sandwiched between splice plates and fastened by passing bolts through the through holes drilled in each of the plates. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a diagram (side cross-sectional view) showing the overall configuration of a temporary fastening pin according to an embodiment of the present invention; [Figure 2]FIG. 10 is a side cross-sectional view showing the operation of the temporary fastening pin. [Figure 3] A diagram showing the temporary fastening method using the same temporary fastening pin [Figure 4] FIG. 10 is a diagram showing the state of the temporary fastening method using the temporary fastening pin, particularly when removing the temporary fastening pin. [Figure 5] A diagram showing a modified example of the temporary fastening pin (side cross-sectional view) [Figure 6] FIG. 10 is a side cross-sectional view showing another modification of the temporary fastening pin. [Figure 7] Figure showing a modified example of the temporary fastening method using the same temporary fastening pin [Figure 8] A diagram showing a particularly useful and effective example of the temporary fastening pin [Figure 9] Diagram showing conventional temporary fastening method DETAILED DESCRIPTION OF THE INVENTION

[0025] Next, an embodiment of the present invention will be described with reference to the drawings. Figure 1 shows the overall structure of a temporary fastening pin, and Figure 2 shows the operating state of this temporary fastening pin.

[0026] As shown in Figure 1, the temporary pin P is A plurality of fastened bodies are stacked on top of each other, and the fastener is inserted into a plurality of through holes drilled between the plurality of fastened bodies to temporarily fix the plurality of fastened bodies. a hollow cylindrical main body pin 1 that can be inserted through and fitted into through holes of a plurality of fastened bodies; a locking member (2) disposed on the tip side of the main pin (1) so as to be able to protrude and retract in the radial direction of the main pin (1), and which is able to engage with the periphery of a through hole in a fastened body at one end, which is the insertion end of the temporary fastening pin (P) in a plurality of fastened bodies; a spring member 3 disposed within the main body pin 1 and biasing the locking member 2 in a direction in which the locking member 2 projects from the main body pin 1; a driving member 4 disposed within the main body pin 1 and driving the locking member 2 in a direction to retract into the main body pin 1; an operating member 5 disposed on the base end side of the main body pin 1 and for operating the driving member 4; a fixing member (6) made of a magnet that is arranged and fixed on the circumferential surface of the main pin (1) at a position spaced from the position where the locking member (2) appears and disappears toward the base end of the main pin (1) by a distance equivalent to the thickness of the multiple fastened bodies, and that can be attracted and fixed by magnetic force to the periphery of a through hole in the fastened body at the other end, which is the insertion starting point of the temporary fastening pin (P) in the multiple fastened bodies; The device is configured to include:

[0027] The main pin 1 has a length that allows it to pass through the through holes of the multiple fastened bodies when they are stacked on top of each other, with both ends of the main pin 1, i.e., a predetermined range on the tip and base ends, protruding from both ends of the through holes of the multiple fastened bodies, and has a hollow cylindrical shape with a diameter slightly smaller than the diameter of the through holes of each of the multiple fastened bodies so that it can be inserted into the through holes of the multiple fastened bodies. In this way, the main pin 1 has a hollow portion 10 in which the locking member 2, spring member 3, and drive member 4 can be arranged along the axis.

[0028] In this case, the main pin 1 is made of a rigid, cylindrical metal pipe with circular openings 10U and 10D at both ends, and a hollow portion 10 with a circular cross section between these openings 10U and 10D. The outer circumferential surface of one end of the pipe, which forms the tip of the main pin 1, is chamfered to form a tapered shape that gradually increases in diameter from the tip to the base end of the pipe. An opening 11 large enough to allow the locking member 2 to enter and exit is formed in part of the outer circumferential surface on the tip side, and a pair of bearings 12 are formed on the outer circumferential surface on both sides of this opening 11 (in this case, at positions perpendicular to the radial cross section of the main pin 1 passing through the center of the opening 11 in the width direction), providing a mounting portion 13 for the locking member 2. A threaded portion 14 is formed on the outer circumferential surface of the other end of the pipe, which forms the base end of the main pin 1, and a nut 15 is screwed onto this threaded portion 14. As will be described later, the length of the main pin 1 is set taking into consideration the required movement stroke of the fixing member 6 on the circumferential surface of the main pin 1 and the size of the opening 11 required for the locking member 2 to move in and out of the opening 11 of the main pin 1. If this temporary fastening pin P1 is used, for example, for steel frame erection, the movement stroke of the fixing member 6 needs to be 60 mm and the length of the opening 11 needs to be at least 10 mm, ensuring an overall length of at least 70 mm. If this temporary fastening pin P1 is used, for example, for bracing beams, the movement stroke of the fixing member 6 needs to be 40 mm and the length of the opening 11 needs to be at least 10 mm, ensuring an overall length of at least 50 mm. Special sizes are also available on rare occasions. To enable use of the temporary fastening pin P1 in most construction projects, the stroke of the fixing member 6 is set to 100 mm, and the length of the opening 11 is set to at least 10 mm. In particular, considering the rotation range of the locking member 2 (described later), the opening 11 is extended by approximately 30 mm to a portion of the stroke of the fixing member, making it approximately 40 mm, ensuring an overall length of at least 110 mm, resulting in a total length of approximately 185 mm for the main pin. Furthermore, since the diameter of the through-hole in the splice plate is generally 25 mm, the diameter of the main pin 1 need only be approximately 22 mm. The stroke length of the fixing member, the total length and the length and diameter of each part of the main pin 1 shown here are merely examples. It goes without saying that the stroke length of the fixing member, the total length and the length and diameter of each part of the main pin 1 can be modified, longer or shorter than the above dimensions, as appropriate, to enable the temporary fastening pin P1 to be adapted to various construction projects. In this case, the opening 11 of the main pin 1 is not only for allowing the locking member 2 to protrude and retract, but one end of the inner periphery of this opening 11 corresponding to the tip of the main pin 1 is formed as a retaining portion 110 that supports without rattle both side surfaces of the locking member 2 that protrudes at a right angle from the main pin 1 as described below, and the edge portion facing the tip of the main pin 1. In particular, one end of the inner periphery of this opening 11 (the end corresponding to the tip of the main pin 1) is a stopper 111 that receives the edge portion of the locking member 2 that protrudes at a right angle from the main pin 1 and supports the locking member 2 at a right angle, and this stopper 111 reliably supports the locking member 2, which is subjected to a large load from the splice plate when the temporary fastening pin P is in use.

[0029] The locking member 2 has a locking portion 21 at one end that can engage with the periphery of the through hole of the object to be fastened at one end, and a bearing 20 on the other end.As already mentioned, an opening 11 is formed on the periphery of the tip side of the main pin 1, and bearings 12 are formed on both sides of this opening 11.The locking member 2 is positioned inside the tip side of the main pin 1, and a rotating shaft 16 is inserted between the bearing 20 of the locking member 2 and the bearing 12 of the main pin 1, so that the locking portion 21 is attached so as to be rotatable between a position where it is immersed in the opening 11 and a position where it protrudes outside the opening 11.

[0030] In this case, the locking member 2 is made of a rigid metal, one end side is formed in a roughly trapezoidal shape, and one side surface 21S facing the base end side of the main pin 1 when the locking member 2 is attached to the main pin 1 is formed in a flat shape perpendicular to one end surface (tip surface) of one end side (of this locking member 2), and this one side surface serves as a support surface for the fastened member. In addition, a recess 22 is formed on the base end side of this one side surface, and bearings 220 are drilled on both sides of this recess 22, forming a connecting portion 23 for the drive member 5. The other end side of the locking member 2 is formed in a roughly semicircular shape, with a bearing 20 formed in its center, and this other end side serves as an attachment portion 24 for the locking member 2 to the main pin 1. The base end side of this locking member 2 is inserted into the interior of the main pin 1 through the opening 11 of the main pin 1, and a rotating shaft 16 is inserted between the bearing 12 of the main pin 1 and the bearing 20 of the locking member 2, so that the locking portion 21 at one end of the locking member 2 is attached rotatably between a retracted position where it is retracted into the opening 11 of the main pin 1 (inside the main pin 1) toward the base end side (of the main pin 1), and a protruding position where it protrudes outside the opening 11 at a right angle to the axial direction of the main pin 1. Note that by attaching this locking member 2, each bearing 220 of the locking member 2 is positioned on the opening 11 side of the main pin 1 with respect to each bearing 20 that forms the mounting portion 24 of this locking member 2.

[0031] A coil spring (hereinafter referred to as spring member 3 or coil spring 3) is used as spring member 3. It is arranged inside main body pin 1 so that, with drive member 4 in a normal state, locking portion 21 of locking member 2 can be biased in a direction to protrude or retract into opening 11 on the tip side of main body pin 1.

[0032] In this case, the coil spring 3 is positioned at the base end inside the main pin 1, and is compressed between the blocking portion (described later) that blocks the base end face of the main pin 1 and the spring holder 40 arranged on the circumferential surface of the drive member 4 at the base end side of the intermediate portion, with the coil spring 3 normally pressing the drive member 4 toward the tip of the main pin 1 inside the main pin 1.

[0033] The drive member 4 consists of a shaft and is inserted into the main pin 1 so as to be drivable in the axial direction of the main pin 1, and one end is operatively connected to the locking member 2 so as to drive the locking portion 21 of the locking member 2 in the direction of sinking into or protruding from the opening 11 at the tip side of the main pin 1.

[0034] In this case, drive member 4 is a rigid metal shaft with a diameter smaller than the inside diameter of main pin 1 and approximately the same length as main pin 1, and a spring retainer 40 is arranged and fixed in the shape of a flange integrally with the circumferential surface of this shaft near the base end of the middle section, and bearings 41, 42 are provided at the tip and base ends. This drive member 4 is inserted and arranged inside main pin 1 with a portion on the base end protruding from main pin 1, and as described above, is normally pressed and urged toward the tip of main pin 1 by coil spring 3 inside main pin 1, and its tip is inserted into recess 22 of connecting portion 23 of locking member 2, and rotating shaft 43 is inserted between bearings 41, 220 of drive member 4 and locking member 2, so that locking portion 21 at the tip of locking member 2 can be pushed and pulled, that is, locking member 2 is connected to rotate as described above. In this case, the drive member 4, i.e., the shaft, is inserted into the main pin 1 at an angle such that the tip of the shaft extends toward the lower end of the opening 11 of the main pin 1 and is journaled by each bearing 220 of the locking member 2, and the base end of the shaft protrudes from the base end face of the main pin 1 (the hole in the blocking portion described later) toward the lever 52 described later, and is inserted at an appropriate angle.

[0035] The operating member 5 is of a lever type, and is operatively connected to the other end of the driving member 4 and is attached to the base end side of the main body pin 1 so as to be able to drive the driving member 4. This operating member 5 consists of a handle 51 fixed to the base end side of the main pin 1 and extending radially from the main pin 1, and a lever 52 rotatably attached to one end of the handle 51 on the main pin 1 side and operatively connected to the other end of the drive member 4.

[0036] In this case, the handle 51 is made of a rigid, elongated, flat metal plate, and has an attachment portion 510 attached to one end thereof for fastening to the base end surface of the main pin 1. The attachment portion 510 is formed in a circular shape slightly smaller than one of the openings of the nut 15 so that it can be placed in contact with one of the openings of the nut 15 that is threaded onto the base end of the main pin 1 and can close the base end surface of the main pin 1, i.e., as the aforementioned closing portion. The attachment portion 510 has a hole formed in an eccentric position on the handle 51 side relative to its center, through which the base end side of the drive member 4 can be inserted. A portion of the base end side of the drive member 4 protrudes obliquely outward from the base end surface of the main pin 1 through the hole in the attachment portion 510 toward the tip (one end) of the lever 52. A bearing 511 for the lever 52 is provided on one end of one surface of the handle 51. Furthermore, a stopper 512 is provided on one end of the handle 51, adjacent to the bearing 511, for holding the lever 52 in the open position, as described below. In this case, the stopper 512 is formed in a gate shape and is attached to one end of the handle 51, spanning both sides of the handle 51, and surrounds the lever 52 from three directions, namely above and on both sides, when the lever 52 is in the open position, thereby restricting the lever 52 from rotating beyond the open position (a predetermined angle).

[0037] In this case, lever 52 is made of a long, narrow, flat plate made of a rigid metal. A bearing 520 for drive member 4 is provided at one end of lever 52. A bearing 521 protrudes from one end side of one surface of lever 52. Lever 52 is placed on top of handle 51, and a rotation shaft (not shown) is inserted between bearing 521 at one end side of one surface and bearing 511 at one end side of one surface of handle 51, so that lever 52 is rotatably attached on handle 51.

[0038] Thus, the operating member 5 has an attachment portion 510 of the handle 51 fixed to one opening surface of the nut 15, extends perpendicularly from the base end surface of the main pin 1, and has a rotating shaft 44 inserted between a bearing 42 at the base end of the drive member 4, which projects obliquely from the base end surface of the main pin 1, and a bearing portion 520 at one end of the lever 52, so that the operating member 5 is operatively connected on the handle 51 side to each bearing 20 forming the attachment portion 24 of the locking member 2. As a result, the lever 52 is normally arranged on the handle 51 with one end side as a pivot point, by the action of the drive member 4 and the coil spring 3, at an open position where the base end side is separated from the handle 51 and extends in an oblique direction. By manually rotating the lever 52 toward the handle 51 to a closed position where it is parallel to the handle 51, the drive member 4 is driven in the pulling direction, and when the rotation of the lever 52 is released, the lever 52 elastically returns to the open position by the action of the drive member 4 and the coil spring 3. The open position of lever 52 is the operating position where locking member 2 protrudes from main pin 1, and in the normal state of temporary fastening pin P, lever 52 is pulled by drive member 4 and is in the open position due to the action of drive member 4 and coil spring 3, and this position is maintained by stopper 512, while locking member 2 is pushed by drive member 4 and rotated outward from opening 11 of main pin 1, protruding at a right angle to the axial direction of main pin 1. This state of locking member 2 is maintained by retaining portion 110 of opening 11 of main pin 1 and stopper 111. Furthermore, the closed position of the lever 52 is an operating position where the locking member 2 is inserted into the main pin 1, and when the lever 52 is rotated from the open position to the closed position against the action of the drive member 4 and the coil spring 3, a portion of the base end of the drive member 4 operatively connected to the lever 52 is pulled out from the main pin 1, and the pulling drive of this drive member 4 rotates the locking member 2 toward the opening 11 of the main pin 1, and it is inserted into the interior of the main pin 1 through the opening 11 of the main pin 1.

[0039] The operating member 5 may also be provided with a locking member for holding the lever 52 in the closed position on the handle 51. Although not specifically shown here, an example of this is shown in Figure 6, which illustrates another embodiment of the temporary fastening pin P. 6, locking member 53 is formed on the other end of handle 51 and comprises a hook mounting portion 530 having bearing portions on both sides (both sides corresponding to the both sides of handle 51), and a hook 531 having one end inserted through and supported by the bearing portion of hook mounting portion 530, rotatably attached to hook mounting portion 530, and capable of engaging with the end side of lever 52 in the closed position on handle 51. In this case, hook mounting portion 530 is formed in a low convex shape on the other end side of the upper surface of handle 51, in this case a convex shape that forms a low arc toward both ends of handle 51, and the space between this arc shape and the upper surface of handle 51 is an arc-shaped hollow that serves as a bearing portion. Hook 531 is formed in a rounded rectangular ring shape that is long in the direction of both ends of handle 51 and has a length necessary for engaging lever 52 on handle 51. One end of this hook 531 is inserted and engaged in the bearing portion of the hook mounting portion 530, in this case, within the arc-shaped hollow portion, and the other end of the hook 531 is attached so as to be able to rotate between the base end side on the handle 51 and the base end side of the handle 51 in the closed position on the handle 51 and engage with the base end side of the lever 52.

[0040] The fixing member 6 has a magnetic force necessary to fix the main body pin 1 inserted into the through holes of the plurality of fastened bodies to the fastened body at the other end of the plurality of fastened bodies. The fixing member 6 consists of a magnet body 60 arranged on the circumferential surface of the main body pin 1 so as to be movable in the axial direction of the main body pin 1, and a magnet body positioning fixing member 61 formed integrally with the magnet body 60 and capable of fixing the magnet body 60 at any position on the circumferential surface of the main body pin 1.

[0041] In this case, the magnet body 60 is appropriately selected from various magnets such as ferrite magnets and neodymium magnets, and one with an appropriate attractive force greater than at least the biasing force (in this case, the pressing force) of the spring member 3 (coil spring 3) on the drive member (shaft) 4 is used. Here, a ferrite magnet with a ferrite cap (for example, attractive force of 12.6 kgf) is used for the magnet body 60. As a result, as will be described later, when multiple fastened objects are temporarily fastened between the fixing member 6 of this temporary fastening pin P and the locking member 2, the main pin 1 is stably fixed to the fastened object on the other end of the multiple fastened objects, and when the main pin 1 is inserted through the fastened object on one end, the main pin 1 can be easily and reliably passed through the fastened object without floating or wobbling.

[0042] In this case, the magnet body positioning and fixing member 61 is fixed integrally (for example, by strong adhesive bonding) to one surface of the magnet body 60, in this case, the surface opposite to the surface at the other end of the magnet body 60 that is attracted to the object to be fastened, and consists of a pair of clamps 611 that can be tightened against the circumferential surface of the main body pin 1, and bolts 612 and nuts 613 that can be tightened between each clamp 611, so that the pair of clamps 611 surround and clamp the entire circumference of the main body pin 1, which is then tightened and fixed with the bolts 612 and nuts 613. This magnet body positioning and fixing member 61 allows the fixing member 6 to be fixed at any position on the circumferential surface of the main body pin 1, movable within a range of a movement stroke of 100 mm from the opening 11 of the main body pin 1 toward the base end.

[0043] 2(1), in the normal state, the drive member 4 is pressed toward the tip of the main pin 1 by the coil spring 3 inside the main pin 1, and this drive member 4 elastically presses one end of the locking member 2, causing the locking portion 21 at one end of the locking member 2 to protrude from the main pin 1, i.e., to protrude outside the opening 11 of the main pin 1 at a right angle to the axial direction of the main pin 1. At this time, the lever 52 of the operating member 5 is in an open position where the base end is separated from the handle 51 and extends in an oblique direction due to the action of the drive member 4 and coil spring 3. As shown in Figure 2 (2), by manually rotating the lever 52 of the operating member 5 toward the handle 51 to a closed position parallel to the handle 51, the drive member 4 is driven in the pulling direction, and the drive member 4 causes the locking portion 21 at one end of the locking member 2 to be pulled into the retracted position of the main pin 1, that is, into the opening 11 of the main pin 1 (inside the main pin 1) and parallel to the axial direction of the main pin 1 toward the base end side (of the main pin 1). As already mentioned, during these operations, the drive member 4, i.e., the shaft, is inserted obliquely at an appropriate angle inside the main pin 1, with the tip of the shaft extending toward the lower end of the opening 11 of the main pin 1 and operatively connected to the locking member 2 on the opening 11 side with respect to each bearing 20 that forms the mounting portion 24 of the locking member 2, and the base end of the shaft protruding from the base end face of the main pin 1 toward the lever 52 side and operatively connected to each bearing 20 that forms the mounting portion 24 of the locking member 2 on the lever 52 side, so that the drive member 4 and the main pin 1 do not interfere with each other, and the forward and backward movement of the drive member 4 and the rotational movement of the locking member 2 are carried out smoothly and reliably.

[0044] In this way, the position of the fixing member 7 of the temporary fastening pin P is adjusted on the main pin 1 (see Figure 2), and a predetermined distance is set between the fixing member 7 and the locking member 2 according to the height (thickness) between the multiple fastened bodies. Then, by inserting the main pin 1 from its tip through the through holes of the multiple fastened bodies, the locking member 2 at the tip side of the main pin 1 protrudes so as to be able to engage with the periphery of the through hole of the fastened body at one end, and the fixing member 6 of the main pin 1 is adsorbed and fixed to the periphery of the through hole of the fastened body at the other end, allowing the multiple fastened bodies to be temporarily fixed between the locking member 2 and the fixing member 6. By operating the operating member 5, the locking member 2 is retracted into the main pin 1, making it possible to pull the main pin 1 out of the through holes of the multiple fastened bodies.

[0045] FIG. 3 shows a temporary fastening method using this temporary fastening pin P, illustrating a case in which a top splice plate S1 is placed on the top surface of the upper flange F1 and a top splice plate S11 is placed on the top surface of the lower flange F2 between the ends of two shaped steel beams such as H-shaped steel or I-shaped steel, spanning the top surfaces of the upper flange F1 and spanning the top surfaces of both sides of the web W of the lower flange F2, and then bottom splice plates S21 and S2 are superimposed on the bottom surfaces of the upper and lower flanges F1 and F2 for each of the upper and lower flanges F1 and F2, and the temporary fastening pin P is inserted through one or more of the multiple through holes S10, S210, S110, S20, F10, and F20 between the upper and lower splice plates S1, S21, S11, and S2 and each of the flanges F1 and F2 to perform temporary fastening.

[0046] In the case of the upper flange F1, first, before the lower splice plate S2 is superimposed on the lower surface of the upper flange F1, a temporary fastening pin P is inserted between the through holes S10, F10 between the upper splice plate S1 and the upper flange F1, and the fixing member 6 of the temporary fastening pin P and the upper splice plate S1 are attracted and fixed by magnetic force.

[0047] At this time, the temporary fastening pin P is set at a predetermined distance between the fixing member 7 and the locking member 2 that is necessary for temporarily fastening the upper and lower splice plates S1, S21, S11, S2 and the flanges F1, F2, the locking portion 21 of the locking member 2 is protruded to the protruding position of the main pin 1, and the lever 52 of the operating member 5 is in the open position. The worker holds the operating member 5 of this temporary fastening pin P and inserts the main pin 1 tip-first into the through-hole S10 of the upper splice plate S1, and then passes it between this through-hole S10 and the through-hole F10 of the upper flange F1. During this time, as the temporary fastening pin P is inserted, the locking member 2 of the temporary fastening pin P abuts against the periphery of the through hole S10 of the upper splice plate S1 and is elastically sunk into the opening 11 of the main pin 1, and as the temporary fastening pin P is inserted between this through hole S10 and the through hole F10 of the upper flange F1, the locking member 2 abuts against the inner circumferential surfaces of each through hole S10, F10 and is elastically sunk into the opening 11 of the main pin 1, and the locking member 2 passes through the through hole F10 of the upper flange F1. When the locking member 2 of the main pin P passes through the through hole F10 of the upper flange F1, the locking portion 21 of the locking member 2 elastically protrudes to the protruding position of the main pin P. The fixing member 6 of this temporary fastening pin P abuts against the top splice plate S1 on the upper flange F1 and is fixed by suction, so that the temporary fastening pin P is stably inserted and fixed between the top splice plate S1 and the upper flange F1. This prevents the temporary fastening pin P from wobbling on the through-holes S10, F10 between the top splice plate S1 and the upper flange F1 or coming out of these through-holes S10, F10, allowing the worker to safely remove their hands from the temporary fastening pin P.

[0048] After the temporary fastening pins P are fixed in the through holes S10, F10 between the upper splice plate S1 and the upper flange F1 in this way, the lower splice plate S21 is lifted with both hands and placed on the underside of the upper flange F1 while aligning the through holes S210, F10 of the lower splice plate S21 and the upper flange F1. Then, from this state, the fixed temporary fastening pin P is inserted from the tip side through the through hole S210 of the lower splice plate S21, and the locking member 2 at the tip side of the main pin 1 is locked around the periphery of the through hole S210 of the lower splice plate S21, temporarily fixing the upper flange F1 and the splice plates S1, S21 on both the upper and lower sides thereof between the fixing member 6 of the temporary fastening pin P and the locking member 2.

[0049] At this time, the temporary fastening pins P are fixed in the through-holes S10, F10 between the upper splice plate S1 and the upper flange F1 by attraction between the fixing member 6 made of a magnet and the upper splice plate S1 on the upper flange F1. Therefore, even if the tip of the temporary fastening pin P hits the periphery of the through-hole S210 when passing it through the through-hole S210 of the lower splice plate S21, the temporary fastening pins P will not wobble and will be stably fixed, allowing the tip of the temporary fastening pin P to be easily and quickly inserted through the through-hole S210 of the lower splice plate S21. In this way, the worker simply holds the splice plate S21 with both hands and inserts the temporary fastening pins P into the through-holes S210 of the splice plate S21. This significantly reduces the strain on the worker's hands and back, improves work safety, and significantly increases the work speed compared to conventional methods. In this way, both ends of the lower splice plate S21 are temporarily fixed with a plurality of temporary fastening pins P, thereby freeing both hands of the worker from the lower splice plate S21.

[0050] Then, bolts B are inserted between the upper flange F1, which has been temporarily fixed with the temporary fastening pins P, and the through holes F10, S10, S210 of the upper and lower splice plates S1, S21 on both sides thereof, and nuts N are fastened to these bolts B to tighten and secure the upper flange F1 and the upper and lower splice plates S1, S21 on both sides thereof. At this time, the through holes F10, S10, S210 between the upper flange F1 and the upper and lower splice plates S1, S21 on both sides thereof are aligned by the temporary fastening pins P, so that the bolts B can be easily and reliably inserted into the through holes F10, S10, S210, and the bolts B and nuts N can be tightened quickly.

[0051] The same applies to the lower flange F2. First, before the lower splice plate S2 is placed on the underside of the lower flange F2, a temporary fastening pin P is inserted through the through holes S110, F20 between the lower upper splice plate S11 and the lower flange F2, and the fixing member 6 of the temporary fastening pin P and the upper splice plate S11 are attracted and fixed together by magnetic force.

[0052] At this time, the temporary fastening pin P has the locking portion 21 of the locking member 2 protruded to the protruding position of the main pin 1, and the lever 52 of the operating member 5 is in the open position. The worker holds the operating member 5 of the temporary fastening pin P in this state and inserts the main pin 1 tip-first into the through-hole S110 of the upper splice plate S11, and then passes it between this through-hole S110 and the through-hole F20 of the lower flange F2. During this time, as the temporary fastening pin P is inserted, the locking member 2 of the temporary fastening pin P abuts against the periphery of the through hole S110 in the upper splice plate S11 and is elastically sunk into the opening 11 of the main pin 1, and as the temporary fastening pin P is inserted between this through hole S110 and the through hole F20 in the lower flange F2, the locking member 2 abuts against the inner circumferential surfaces of the through holes S110, F20 and is elastically sunk into the opening 11 of the main pin 1, and the locking member 2 passes through the through hole F20 in the lower flange F2. When the locking member 2 of the main pin 1 passes through the through hole F20 in the lower flange F2, the locking portion 21 of the locking member 2 elastically protrudes to the protruding position of the main pin 1. The fixing member 6 of this temporary fastening pin P then comes into contact with and is fixed by suction onto the upper splice plate S11 on the flange F2 below this temporary fastening pin P, and the temporary fastening pin P is stably inserted and fixed between the lower upper splice plate S11 and the lower flange F2. This prevents the temporary fastening pin P from wobbling on the through holes S110, F20 between the lower upper splice plate S11 and the lower flange F2 or coming out of these through holes S110, F20, allowing the worker to safely remove their hands from the temporary fastening pin P.

[0053] After the temporary fastening pin P is fixed in this way in each of the through holes S110, F20 between the lower upper splice plate S11 and the lower flange F2, the lower lower splice plate S2 is lifted with both hands and placed on the underside of the lower flange F2 while aligning the through holes S20, F20 of the lower splice plate S2 and the lower flange F2. Then, from this state, the fixed temporary fastening pin P is inserted from the tip side through the through hole S20 of the lower splice plate S2, and the locking member 2 is locked at the tip side of the main pin 1 around the periphery of the through hole S20 of the lower splice plate S2, temporarily fixing the lower flange F2 and the splice plates S11, S2 on both the upper and lower sides thereof between the fixing member 6 of the temporary fastening pin P and the locking member 2.

[0054] At this time, the temporary fastening pins P are fixed in the through-holes S110, F20 between the upper splice plate S11 and the lower flange F2 by attraction between the fixing member 6 made of a magnet and the upper splice plate S11 on the lower flange F2. Therefore, even if the tip of the temporary fastening pin P hits the periphery of the through-hole S20 of the lower splice plate S1 when passing it through the through-hole S20, the temporary fastening pin P remains stably fixed without wobbling, and the tip of the temporary fastening pin P can be easily and quickly passed through the through-hole S20 of the lower splice plate S2. In this way, the worker simply holds the splice plate S2 with both hands and inserts the temporary fastening pin P into the through-hole S20 of the splice plate S2. Compared to conventional methods, the strain on the worker's hands and waist is significantly reduced, the work is safer, and the work speed is greatly increased. In this way, both ends of the lower splice plate S2 for the lower surface are temporarily fixed with a plurality of temporary fastening pins P, thereby freeing both hands of the worker from the splice plate S2 for the lower surface.

[0055] Then, bolts B are inserted between the through holes F20, S110, S20 of the lower flange F2 temporarily fixed with the temporary fastening pins P and the upper and lower splice plates S11, S2 on both sides thereof, and nuts N are fastened to the bolts B to tighten and secure the lower flange F2 and the upper and lower splice plates S11, S2 on both sides thereof. At this time, the through holes F20, S110, S20 of the lower flange F2 and the upper and lower splice plates S11, S2 on both sides thereof are aligned by the temporary fastening pins P, so that the bolts B can be easily and reliably inserted into the through holes F20, S110, S20, and the bolts B and nuts N can be tightened quickly.

[0056] Whether in the case of the upper flange F1 or the lower flange F2, when removing the temporary fastening pin P from the flanges F1, F2 and the splice plates S1, S21, S11, S2 on both sides thereof, the operating member 5 is operated to insert the locking member 2 into the tip side of the main pin 1, and the main pin 1 is then pulled out from the through holes F10, S10, S210, F20, S110, S20 of the flanges F1, F2 and the splice plates S1, S21, S11, S2 on both sides thereof.

[0057] In this case, when the operating member 5 is held with one hand and the lever 52 is pushed down from the open position to the closed position, the lever 52 causes the drive member 4 to be pulled out from the main pin 1 while the coil spring 3 is compressed between the base end of the main pin 1 and the spring holder 40 of the drive member 4, and the drive of the drive member 4 causes the locking member 2 to rotate from the protruding position to the retracted position and be retracted into the opening 11 of the main pin 1 (inside the main pin 1).With this simple operation, the temporary fastening pin P can be smoothly and reliably pulled out from the upper and lower flanges F1, F2 and the respective through holes F10, S10, S210, F20, S110, S20 of the upper and lower flanges F1, F2 and the respective splice plates S1, S21, S11, S2 on both the upper and lower sides thereof (see Figure 4), even if there is a misalignment between these through holes. If the temporary fastening pin P is provided with a locking member 53 (see Figure 6), the lever 52 can be pushed down from the open position to the closed position by raising the locking member 53 on the upper base end side of the handle 51, i.e., the hook 531, and hooking it onto the base end side of the lever 52 to lock the lever 52 in the closed position, thereby eliminating the need to keep pushing down the lever 52 by hand and enabling the temporary fastening pin P to be removed reliably and easily.

[0058] After the temporary fastening pins P are removed from the insertion positions thereof, bolts B are passed through these positions, and nuts N are fastened to these bolts B.

[0059] As explained above, the temporary fastening pin P is configured to include the main pin 1, the locking member 2, the spring member 3, the drive member 4, the operating member 5, and the fixing member 6 made of a magnet. By inserting the main pin 1 from its tip through the through holes of multiple fastened bodies in this manner, the locking member 2 at the tip side of the main pin 1 protrudes so as to be able to engage with the periphery of the through hole of the fastened body at one end, and the fixing member 6 of the main pin 1 is attracted and fixed to the periphery of the through hole of the fastened body at the other end, temporarily fastening multiple fastened bodies between the locking member 2 and the fixing member 6. This reduces the physical burden on the worker when multiple fastened bodies are stacked and fastened with fastening members, such as when the ends of two steel beams are sandwiched between splice plates and fastened by passing bolts through the through holes drilled in each plate. By operating the operating member 5, the locking member 2 is immersed in the main pin 1, making it possible to pull out the main pin 1 from the through holes of the multiple fastened bodies, so that the temporary fastening pin P can be smoothly and reliably pulled out from the through holes of the upper and lower flanges and the splice plates on both the upper and lower sides thereof, even if there is misalignment between these through holes.

[0060] The temporary fastening pin P is made up of the following parts. The main pin 1 has a length that allows it to pass through the through holes of the multiple fastened bodies when they are stacked on top of each other, and protrudes from both ends of the through holes of the multiple fastened bodies at a predetermined range on the tip and base ends of the main pin 1.It has a hollow cylindrical shape with a diameter slightly smaller than the diameter of the through holes of each fastened body so that it can be inserted into the through holes of the multiple fastened bodies. The locking member 2 has a locking portion 21 at one end that can engage with the periphery of the through hole of the object to be fastened at one end, and a bearing 20 at the other end. An opening 11 is formed on the periphery of the tip side of the main pin 1, and bearings 12 are formed on both sides of this opening 11. The locking member 2 is positioned inside the tip side of the main pin 1, and a rotating shaft 16 is inserted between the bearing 20 of the locking member 2 and the bearing 12 of the main pin 1, so that the locking portion 21 is rotatably attached between a position where it is immersed in the opening 11 and a position where it protrudes outside the opening 11. The drive member 4 consists of a shaft and is inserted into the main pin 1 so as to be drivable in the axial direction of the main pin 1, and one end is operatively connected to the locking member 2 so as to drive the locking portion 21 of the locking member 2 in the direction of sinking into or protruding from the opening 11 at the tip side of the main pin 1. The spring member 3 is made of a coil spring and is arranged within the main pin 1 so that when the drive member 4 is in its normal state, the locking portion 21 of the locking member 2 can be biased in a direction in which it protrudes or retracts into the opening 11 at the tip side of the main pin 1. The operating member 5 is of a lever type, and is operatively connected to the other end of the driving member 4 and is attached to the base end side of the main body pin 1 so as to be able to drive the driving member 4. In this case, it is preferable that the operating member 5 comprises a handle 51 fixed to the base end side of the main pin 1 and extending radially from the main pin 1, and a lever 52 rotatably attached to one end side of the handle 51 on the main pin 1 side and operatively connected to the other end of the drive member 4. The fixing member 6 has a magnetic force necessary to fix the main body pin 1 inserted into the through holes of the multiple fastened bodies to the fastened body at the other end of the multiple fastened bodies. In this case, the fixing member 6 preferably comprises a magnet body 60 arranged on the circumferential surface of the main body pin 1 so as to be movable in the axial direction of the main body pin 1, and a magnet body positioning fixing member 61 integrally formed on the magnet body 60 and capable of fixing the magnet body 60 at any position on the circumferential surface of the main body pin 1. In this case, the magnet body positioning and fixing member 61 is preferably integrally provided on the surface opposite to the surface at the other end of the magnet body 60 that is attracted to the object to be fastened, and comprises a pair of clamps 611 that can be tightened around the circumferential surface of the main body pin 1, and bolts 612 and nuts 613 that can be tightened between each clamp 611. By combining these members 1-6, the temporary fastening pin P can be made to have a simple structure as a whole, and can be made to have excellent durability and operability, and can also be manufactured at low cost.

[0061] This temporary fastening method using temporary fastening pins P is useful when the temporary fastening is performed between the ends of two structural steels such as H-shaped steel or I-shaped steel, by placing an upper splice plate S1 on the upper surface of the upper flange F1 and an upper splice plate S11 on the upper surface of the lower flange F2, spanning the upper surfaces of the upper flange F1 and the upper surfaces of both sides of the web W of the lower flange F2, and then overlapping lower splice plates S21 and S2 on the lower surfaces of the flanges F1 and F2 for each of the upper and lower flanges F1 and F2, and inserting a temporary fastening member such as a bolt through one or more of the multiple through holes S10, S210, S110, S20, F10, and F20 between the upper and lower splice plates S1, S21, S11, and S2 and each of the flanges F1 and F2 to perform temporary fastening. In this case, a temporary fastening pin P is used as the temporary fastening member. Before the lower splice plates S21, S2 are superimposed on the lower surfaces of the flanges F1, F2 for each of the upper and lower flanges F1, F2, the temporary fastening pin P is first inserted through the through holes S10, S110, F10, F20 between the upper splice plates S1, S11 and the flanges F1, F2, and the fixing member 6 of the temporary fastening pin P and the upper splice plates S1, S11 are attracted and fixed by magnetic force. After the temporary fastening pin P is fixed on the through holes S10, S110, F10, F20 between the upper splice plates S1, S11 and the flanges F1, F2, the lower splice plates S21, S2 are lifted with both hands and placed on the undersides of the flanges F1, F2. From this state, the temporary fastening pin P is inserted from the tip side through the through holes S210, S20 of the lower splice plates S21, S2, and the locking member 2 is locked at the tip side of the main pin 1 around the periphery of the through holes S210, S20 of the lower splice plates S21, S2, thereby temporarily fixing the flanges F1, F2 and the splice plates S1, S21, S11, S2 on both sides thereof between the fixing member 6 and the locking member 2. When removing the temporary fastening pin P from the flanges F1, F2 and the splice plates S1, S21, S11, S2 on either side thereof, the operating member 5 is operated to push the locking member 2 into the tip side of the main pin 1, and the main pin 1 is pulled out from the through holes F10, F20, S10, S210, S110, S20 of the flanges F1, F2 and the splice plates S1, S21, S11, S2 on either side thereof. This construction method allows for the temporary fixing of multiple fastened objects, such as when sandwiching the ends of two steel beams with a splice plate and fastening them with bolts through holes drilled in each, and when multiple fastened objects are stacked and fastened together with fastening members, to be carried out safely, reliably, and quickly while reducing the physical burden on workers.

[0062] In this embodiment, the operating member 5 is fixed to the base end of the main pin 1 and consists of a handle 51 extending radially from the main pin 1, and a lever 52 rotatably attached to one end of the handle 51 on the main pin 1 side and operatively connected to the other end of the drive member 4. However, as shown in Figure 5, the operating member 5 may also consist of an annular handle 53 fixed to the base end of the main pin 1 and an annular lever 54 arranged within the annulus of the handle 53 so as to be movable in the pulling direction relative to the base end of the main pin 1 and operatively connected to the other end of the drive member 4. In this case, the handle 53 is gripped from above, the four fingers other than the thumb are hooked on the lever 54, and the lever 54 is pulled, whereby the driving member 4 is similarly driven. This also provides the same effects as those of the above embodiment.

[0063] In addition, in this embodiment, the magnet body positioning and fixing member 61 is integrally formed on the surface opposite to the adsorption surface at the other end of the magnet body 60 relative to the object to be fastened, and consists of a pair of clamps 611 that can be tightened to the circumferential surface of the main body pin 1, and a bolt 612 and a nut 613 that can be tightened between each clamp 611.However, as shown in Figure 6, the magnet body positioning and fixing member 61 may also be formed as a socket 62 that has a threaded portion 141 in a predetermined range on the circumferential surface at the base end of the main body pin 1, is integrally formed on the surface opposite to the adsorption surface at the other end of the magnet body 60 relative to the object to be fastened, is tubular (for example, cylindrical) so that it can be fitted onto the circumferential surface of the main body pin 1, and has a threaded portion 621 that can be screwed into the threaded portion 141 of the main body pin 1. In this case, by turning the socket 62 on the threaded portion 141 on the circumferential surface of the main body pin 1, the socket 62 moves together with the magnet main body 60 via the threaded portion 621 of the socket 62, and the magnet main body 60 is fixed in any position. This also provides the same effects as those of the above embodiment.

[0064] Furthermore, in this embodiment, in the temporary fastening method using the temporary fastening pin P, between the ends of two shaped steels such as H-shaped steel or I-shaped steel, a top splice plate S1 is placed on the top surface of the upper flange F1 and a top splice plate S11 is placed on the top surface of the lower flange F2, spanning the top surfaces of the upper flange F1 and the web W of the lower flange F2, respectively, and then bottom splice plates S21 and S2 are superimposed on the bottom surfaces of the flanges F1 and F2 for each of the upper and lower flanges F1 and F2, and the top and bottom splice plates S21 and S2 are placed on the bottom surfaces of the flanges F1 and F2, respectively. The method of temporarily fastening the splice plates S1, S21, S11, S2 by inserting a temporary fastening pin P from above into one or more of the multiple through holes S10, S210, S110, S20, F10, F20 between the splice plates S1, S21, S11, S2 and each flange F1, F2 has been described, but this temporary fastening method may also be used by inserting a temporary fastening pin P from below into one or more of the multiple through holes S10, S210, S110, S20, F10, F20 between the upper and lower splice plates S1, S21, S11, S2 and each flange F1, F2.

[0065] In this case, as shown in Figure 7, before the lower splice plates S21, S2 are superimposed on the lower surfaces of the flanges F1, F2 for each of the upper and lower flanges F1, F2, the temporary fastening pin P is first inserted into the through holes S210, S20 of the lower splice plates S21, S2 from below the through holes S210, S20, and the fixing member 6 of the temporary fastening pin P and the lower splice plates S21, S2 are attracted and fixed by magnetic force. Next, the lower splice plates S21, S2 are lifted with both hands, and while doing so, the temporary fastening pin P can be held down with the other hand, and they are placed on top of the lower surfaces of the flanges F1, F2. From this state, the tips of the temporary fastening pin P are inserted into the through holes F10, S10, F20, S110 of the flanges F1, F2 and the upper splice plates S1, S11 above them, and the locking member 2 is locked on the tip side of the main pin 1 to the periphery of the through holes S10, S110 of the upper splice plates S1, S11, thereby temporarily fixing the flanges F1, F2 and the splice plates S1, S21, S11, S2 on both sides of them between the fixing member 6 and the locking member 2. When removing the temporary fastening pin P from the flanges F1, F2 and the splice plates S1, S21, S11, S2 on either side thereof, the operating member 5 is operated to insert the locking member 2 into the tip side of the main pin 1, and the main pin 1 is then pulled out from the through holes F10, F20, S10, S210, S110, S20 of the flanges F1, F2 and the splice plates S1, S21, S11, S2 on either side thereof. This also provides the same effects as those of the above embodiment. This technique is effective when the top surfaces of the upper and lower flanges F1, F2 are too high from the worker's perspective, making it difficult to pass the temporary fastening pin P from above through the multiple through holes F10, F20, S10, S210, S110, S20 between the upper and lower flanges F1, F2 and the upper and lower splice plates S1, S21, S11, S2, or when the splice plates are heavily rusted and the magnetic force of the fixing member 6 of the temporary fastening pin P cannot be fully exerted.

[0066] In addition, in this embodiment, as a temporary fastening method using temporary fastening pins P, an upper splice plate is placed on the upper surface of the upper flange and an upper splice plate is placed on the upper surface of the lower flange, spanning the upper surfaces of the upper flanges and the upper surfaces of both sides of the web of the lower flange, respectively, between the ends of two structural steels such as H-shaped steel or I-shaped steel, and then a lower splice plate is placed on the underside of the flange for each of the upper and lower flanges, and the temporary fastening pins P are inserted into one or more of the multiple through holes between each of the upper and lower splice plates and each flange to temporarily fasten them.However, the present invention can also be applied to a case where two splice plates are placed between the ends of two structural steels such as H-shaped steel or I-shaped steel, spanning the both surfaces of the webs of both steels, and then a temporary fastening member such as a bolt is inserted into one or more of the multiple through holes between each splice plate and the web to temporarily fasten them. In this case, a temporary pin P is used. Before overlapping each splice plate on both sides of the web, one side of each splice plate is lifted with both hands and overlapped on one side of the web, and while holding this state, a temporary fastening pin P is inserted into the through-hole between one side of each splice plate and the web, and the fixing member of the temporary fastening pin P and one side of each splice plate are attracted and fixed by magnetic force. After fixing the temporary fastening pin P on the through hole between one side of each splice plate and the web, lift the other side of each splice plate with both hands and align the through holes of the splice plate and the web while overlapping one side of the other side of the web. From this state, insert the temporary fastening pin from the tip side into the through hole of the other side of each splice plate, and engage the locking member at the tip side of the main pin with the periphery of the through hole of the other side of each splice plate, temporarily fixing the web and each splice plate on both sides between the fixing member and the locking member. When removing the temporary fastening pin P from the web and each splice plate on both sides thereof, the operating member is operated to push the locking member toward the tip side of the main pin, and the main pin is then pulled out from the through holes in the web and each splice plate on both sides thereof. This also provides the same effects as those of the above embodiment.

[0067] Furthermore, these temporary fastening methods involve overlapping a splice plate across the ends of two steel beams, such as H-shaped steel or I-shaped steel, and temporarily fastening them by inserting a temporary fastening pin through one or more of the multiple through holes between the ends of each steel beam and each end of the splice plate, and these methods include the following two methods for implementing them. (First method) In the first method, the ends of two shaped steel beams are placed close to each other, and the splice plate is initially placed between the ends of the two shaped steel beams and overlapped between them. The ends of each shaped steel beam and each end of the splice plate are then temporarily fastened together with temporary fastening pins in parallel. While or after temporarily fastening each shaped steel beam and each end of the splice plate with temporary fastening pins, they are then fastened together with bolts and nuts. (Second method) In the second method, the ends of two sectional steel beams are separated, and one end of the splice plate is first placed over the end of one sectional steel beam, and these ends are temporarily fastened together with a temporary fastening pin and then fastened together with bolts and nuts. In this way, the splice plate is attached to the end of one sectional steel beam in a cantilevered manner. After this, the end of the other sectional steel beam is brought close to the end of the first sectional steel beam, and the splice plate is placed over the ends of the two sectional steel beams, and the other end of the splice plate and the other end of the other sectional steel beam are temporarily fastened together with a temporary fastening pin and then fastened together with bolts and nuts. In relation to this second method, Figure 8 shows an example of connecting two H-shaped steel beams via a splice plate in H-shaped steel beam insertion work, in which H-shaped steel beams are inserted or extended as pile or core materials, such as in pile driving work or earth retaining wall construction (SMW method). In this type of construction, multiple H-shaped steel beams are arranged in parallel on a frame on one side of a certain area of ​​the construction site, and multiple H-shaped steel beams are arranged in parallel on a frame on the other side of the same area, spaced apart from the first side, with the ends of the H-shaped steel beams facing each other. One end of a splice plate is first placed on the end of one of the H-shaped steel beams on one side and these ends are temporarily fastened together with bolts. After that, the end of the other steel beam is brought close to the end of the first steel beam, and the splice plate is placed across the ends of the two steel beams, and the other end of the splice plate is fastened to the end of the other steel beam with bolts and nuts. In such construction, the splice plates used in the construction are often heavy as mentioned above, which is the object of the present invention, and the second method described above is particularly useful, making this temporary fixing pin P effective. [Explanation of symbols]

[0068] P Temporary fastening pin 1 Main body pin 10U, 10D opening 11 Aperture 110 holding part 111 Stopper 12 Bearings 13 Mounting portion of locking member 14 Threaded section 141 Threaded part 15 Nut 16 Rotating Axis 2 Locking member 20 Bearings 21 Locking portion 21S one side 22 recess 220 Bearings 23 Connecting part 24 Mounting part 3 Spring material (coil spring) 4 Driving member 40 Spring holder 41, 42 Bearings 43, 44 Rotating shaft 5 Operating member 51, 53 Handle 510 Mounting part 511 Bearings 512 Stopper 52, 54 Lever 520 Bearing section 521 Bearings 53 Locking member 530 Hook mounting part 531 Hook 6 Fixing member 60 Magnet body 61 Magnet body positioning fixing member 611 Clamp 612 volts 613 Nut 62 sockets 621 Threaded part Flange on F1 F10 through hole F2 Lower flange F20 through hole W Web S1 Top splice plate S10 through hole S11 Top Splice Plate S110 Through hole S2 bottom splice plate S20 through hole S21 bottom splice plate S210 Through hole B Bolt N nut

Claims

1. A temporary fastening pin is inserted into a plurality of through holes formed between a plurality of fastened bodies by overlapping the plurality of fastened bodies, and temporarily fastens the plurality of fastened bodies, a hollow cylindrical main body pin that can be inserted through the through holes of the plurality of fastened bodies; a locking member disposed at the tip side of the main pin so as to be able to protrude and retract in the radial direction of the main pin, and capable of engaging with the periphery of a through hole in one of the workpieces at one end which is the insertion end of the temporary fastening pin in the workpieces; a spring member disposed within the main body pin and biasing the locking member in a direction in which the locking member protrudes from the main body pin; a driving member disposed within the main body pin and configured to drive the locking member in a direction to be inserted into the main body pin; an operating member disposed on a base end side of the main body pin for operating the drive member; a fixing member consisting of a magnet that is arranged and fixed on the circumferential surface of the main pin at a position spaced from the retracted position of the locking member toward the base end of the main pin by a dimension equivalent to the thickness of the plurality of fastened bodies, and that can be attracted and fixed by magnetic force to the periphery of a through hole in the fastened body at the other end, which is the insertion starting point of the temporary fastening pin, among the plurality of fastened bodies; Equipped with By inserting the main body pin from its tip through the through holes of the multiple fastened bodies, the locking member protrudes at the tip side of the main body pin so as to be able to engage with the periphery of the through hole of the fastened body at one end, and the fixing member of the main body pin is adsorbed and fixed to the periphery of the through hole of the fastened body at the other end, temporarily fixing the multiple fastened bodies between the locking member and the fixing member, By operating the operating member, the locking member is immersed in the main body pin, and the main body pin can be pulled out from the through holes of the plurality of fastened bodies. A temporary fastening pin characterized by:

2. The locking member has a locking portion at one end that can engage with the periphery of the through hole of the object to be fastened at one end, and a bearing at the other end, an opening is formed on the circumferential surface of the tip side of the main pin, and bearings are formed on both sides of the opening, the locking member is disposed inside the tip side of the main pin, a rotating shaft is inserted between the bearing of the locking member and the bearing of the main pin, and the locking portion is attached so as to be rotatable between a position where it is immersed in the opening and a position where it protrudes outside the opening, the drive member is a shaft, and is inserted into the main pin so as to be drivable in the axial direction of the main pin, and one end of the drive member is operatively connected to the locking member so as to drive the locking portion of the locking member in a direction to retract into or protrude from the opening at the tip side of the main pin; the spring member is a coil spring and is disposed within the main body pin so as to be biased in a direction in which the locking portion of the locking member protrudes or retracts into the opening at the tip end of the main body pin when the drive member is in a normal state; the operating member is of a lever type and is operatively connected to the other end of the driving member, and is attached to the base end side of the main body pin so as to be able to drive the driving member; The fixing member has a magnetic force necessary to fix the main body pin inserted into the through hole of the plurality of fastened bodies to the fastened body at the other end of the plurality of fastened bodies. The temporary fastening pin according to claim 1 .

3. 3. The temporary fastening pin according to claim 2, wherein the operating member comprises a handle fixed to the base end of the main pin and extending in the radial direction of the main pin, and a lever rotatably attached to one end of the handle on the main pin side and operatively connected to the other end of the drive member.

4. 3. The temporary fastening pin according to claim 2, wherein the operating member comprises an annular handle fixed to the base end of the main pin, and a lever disposed within the annular portion of the handle so as to be movable in a pulling direction relative to the base end of the main pin and operatively connected to the other end of the drive member.

5. 2. The temporary fastening pin according to claim 1, wherein the fixing member comprises a magnet body arranged on the circumferential surface of the main body pin so as to be movable in the axial direction of the main body pin, and a magnet body positioning fixing member formed integrally with the magnet body and capable of fixing the magnet body at any position on the circumferential surface of the main body pin.

6. The temporary fastening pin according to claim 5, wherein the magnet body positioning and fixing member is integrally formed on the surface of the other end of the magnet body opposite the surface that is attracted to the object to be fastened, and comprises a pair of clamps that can be tightened to the circumferential surface of the main body pin, and a bolt and nut that can be tightened between each of the clamps.

7. 6. A temporary fastening pin as described in claim 5, wherein the main body pin has a thread on its peripheral surface, and the magnet main body positioning and fixing member is integrally formed on the surface of the other end of the magnet main body opposite the surface that is attracted to the object to be fastened, and the temporary fastening pin is a cylindrical socket that can be fitted onto the peripheral surface of the main body pin and has a threaded portion that can be screwed onto the thread of the main body pin.

8. A temporary fastening method in which an upper splice plate is placed on the upper surface of the upper flange and an upper splice plate is placed on the upper surface of the lower flange, spanning the upper surfaces of the upper flanges and the upper surfaces of both sides of the web of the lower flange, between the ends of two shaped steels such as H-shaped steel or I-shaped steel, and then a lower splice plate is placed on the lower surface of each of the upper and lower flanges, and temporary fastening members such as bolts are inserted into one or more of a plurality of through holes between each of the upper and lower splice plates and each of the flanges, The temporary fastening member uses the temporary fastening pin of claim 1, For each of the upper and lower flanges, before the lower splice plate is superimposed on the lower surface of the flange, the temporary fastening pin is inserted into the through-hole between the upper splice plate and the flange, and the fixing member of the temporary fastening pin and the upper splice plate are attracted and fixed by magnetic force, After the temporary fastening pin is fixed on the through hole between the upper splice plate and the flange, the lower splice plate is lifted with both hands and placed on the underside of the flange. From this state, the temporary fastening pin is inserted from the tip side into the through hole of the lower splice plate, and the tip side of the main pin is engaged with the locking member on the periphery of the through hole of the lower splice plate, thereby temporarily fixing the flange and each of the splice plates on both sides thereof between the fixing member and the locking member. A temporary fastening method using a temporary fastening pin, characterized in that when removing this temporary fastening pin from the flange and each of the splice plates on both sides thereof, the operating member is operated to push the locking member toward the tip side of the main pin, and the main pin is pulled out from the through holes of the flange and each of the splice plates on both sides thereof.

9. A temporary fastening method in which two splice plates are placed between the ends of two shaped steel beams, such as H-shaped steel beams or I-shaped steel beams, spanning both surfaces of the webs of both beams, and then temporary fastening members such as bolts are inserted into one or more of a plurality of through holes between each splice plate and the web, The temporary fastening member uses the temporary fastening pin of claim 1, Before overlapping each splice plate on both sides of the web, lift one of the splice plates with both hands and overlap it on one side of the web. While holding this state, insert the temporary fastening pin into the through-hole between one of the splice plates and the web, and magnetically attract and fix the fixing member of the temporary fastening pin to one of the splice plates. After the temporary fastening pin is fixed onto the through-hole between one of the splice plates and the web, the other of the splice plates is lifted with both hands and placed on the other side of the web. From this state, the temporary fastening pin is inserted from the tip side into the through-hole of the other of the splice plates, and the tip side of the main pin is engaged with the locking member on the periphery of the through-hole of the other of the splice plates, thereby temporarily fixing the web and each of the splice plates on both sides between the fixing member and the locking member. When removing the temporary fastening pin from the web and each of the splice plates on both sides thereof, an operating member is operated to retract the locking member into the tip side of the main body pin, and the main body pin is pulled out from the through holes of the web and each of the splice plates on both sides thereof. A temporary fastening method using a temporary fastening pin.

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