JP2022150655A - Temporary bolt-free joining device and method for removing temporary bolt-free joining device - Google Patents

Abstract

To eliminate the need for replacing a temporary suspended scaffold by preventing the occurrence of interference between a temporary bolt-free joining device and the temporary suspended scaffold when a steel column and a steel beam are connected.SOLUTION: A temporary bolt-free joining device 1 is provided with a plate 10, a pin 12 hanging on the underside of the plate and a pin detachment mechanism 2. The plate 10 is provided with a mounting bolt mounting hole 15 for mounting on a beam steel. The detachment mechanism 2 is provided with a shaft part 21 arranged in a support projection 20 on the upper surface of the plate 10 and a hook-like member 24 energized and rotatable against the outer surface of the pin 12 with the shaft part 21 as its axis. The hook-like member 24 is provided with a hook tip part 241 abutting on the outer surface of the pin 12, an L-shaped part 243 rotatably attached to the shaft part 21, and a connecting pin part 245 connecting the L-shaped part 243 and the hook tip part 241 to form an intermediate part of the hook-like member 24. The hook-like member 24 is bent by turning the hook tip part 241 toward the L-shaped part 243 by the connecting pin part 245 to reduce the turning radius of the whole hook-like member 24.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining device that does not require a temporary fixing bolt when connecting a steel frame column and a beam steel frame, and a removal method for removing the joining device that does not require a temporary fixing bolt.

When connecting a steel frame column and a beam steel as described in Patent Document 1, a temporary fixing bolt unnecessary joining device that enables connection without using a temporary bolt is used (see Patent Document 2, for example). .

JP 2016-121494 A JP 2019-157526 A

At a construction site, a temporary suspended scaffolding called a tobik is used when a large beam with a beam height of, for example, 600 mm or more is combined and a plurality of rod-shaped members are combined to perform final tightening of the beam. When necessary, there are cases where a joint jig that does not require temporary bolts, a temporary suspended scaffolding, and a splice plate used for the joint part of steel materials, etc., as described in Patent Document 2, may interfere. After the suspension scaffolding has been removed from the beam material or replaced, it is necessary to remove the joint device that does not require temporary fixing bolts.

Therefore, in a joining device that connects a steel frame column and a beam steel frame without using temporary bolts, it is necessary to prevent contact interference between the joining device that does not require temporary bolts and the bars of the temporary suspension scaffold when performing the connection. By doing so, there is a problem that the worker does not need to replace the temporary suspended scaffold.

The present invention for solving the above-mentioned problems is a joint device that does not require temporary bolts and is used for connecting a steel frame column and a beam steel frame, comprising: a base plate; a retaining mechanism for the joining pin, wherein the base plate includes a bolt mounting hole into which a mounting bolt for attaching to the beam steel frame can be mounted, and the retaining mechanism is a support provided on the upper surface of the base plate. a projection, a shaft portion disposed on the support projection with an axial direction perpendicular to the hanging direction of the joint pin, and a rotation biased toward the outer surface of the joint pin about the shaft portion. a movable hook-shaped member, the hook-shaped member having a hook tip portion that contacts the outer surface of the joint pin; an L-shaped portion that is rotatably attached to the shaft; a connecting pin portion that connects the lower end side of the L-shaped portion and the upper end side of the hooked portion and serves as an intermediate portion of the hooked member; A joining device that does not require a temporary bolt can bend the hook-shaped member by rotating the hook-shaped member in the direction of the shaft, thereby reducing the radius of rotation of the hook-shaped member as a whole.

The temporary bolt-free joining device according to the present invention lights up when the hook-shaped member is in contact with the joining pin in a state in which the joining pin is inserted into at least the bolt hole of the steel frame column and set vertically. It is preferable that a light be provided so that the user can visually confirm that the retaining mechanism is functioning.

In addition, the present invention for solving the above-mentioned problems is the steel frame column and the beam, which are connected and fixed by using the temporary bolt-free joining device, on which a temporary suspended scaffold formed of a plurality of rod-shaped members is hung. A removal method for removing the temporary bolt-unnecessary joining device from a steel frame, wherein the hook-shaped member of the temporary bolt-unnecessary joining device is rotated around the shaft portion so as to separate from the joint pin. a rotating step, a hook-shaped member bending step of bending the hook-shaped member while rotating the hook tip portion toward the L-shaped portion by the connecting pin portion in the hook-shaped member rotating step; a detachment step of detaching the joint pin of the temporary bolt-free joint device with the hook-shaped member bent from the steel frame column and the beam steel frame.

A temporary bolt-free joining device according to the present invention used for joining a steel frame column and a beam steel frame includes a base plate, a joining pin that hangs down at a predetermined length on the lower surface side of the base plate, and a mechanism for preventing the joining pin from coming off. , The base plate has bolt mounting holes into which mounting bolts can be mounted to be attached to the beam steel frame. and a hook-shaped member that is urged toward the outer surface of the joint pin and is rotatable around the shaft. A hooked portion that abuts on the outer surface of the hook, an L-shaped portion that is rotatably attached to the shaft, and the lower end of the L-shaped portion and the upper end of the hooked portion are connected to the middle of the hook-shaped member. By providing the connecting pin portion as a part, the hook tip portion is rotated toward the L-shaped portion by the connecting pin portion to bend the hook-shaped member, thereby reducing the rotation radius of the entire hook-shaped member. Therefore, when the retaining mechanism is removed from the steel frame column or beam steel frame, it is possible to prevent the retaining mechanism from interfering with a temporary suspended scaffolding bar or the like called a tobik, for example.

A temporary bolt-free joining device according to the present invention includes a light that lights up when a hook-shaped member is in contact with a joining pin in a state in which the joining pin is inserted into at least a bolt hole of a steel frame column and set vertically. By using the light, it is possible to visually confirm that the retaining mechanism is functioning.

According to the present invention, a temporary suspended scaffold formed by a plurality of rod-shaped members is hung, and the temporary bolt unnecessary joining device is removed from the steel frame column and the beam steel frame that are connected and fixed using the temporary bolt unnecessary joining device. The removal method includes a hook-shaped member rotating step of rotating the hook-shaped member of the temporary bolt unnecessary joining device about the shaft portion so as to separate from the joining pin, and a hook-shaped member rotating step in which the hook is attached by the connecting pin portion. A hook-shaped member bending step of bending the hook-shaped member while rotating the tip portion toward the L-shaped portion, and removing the joining pin of the temporary bolt unnecessary joining device in which the hook-shaped member is bent from the steel frame column and the beam steel frame. By providing the detachment step, the hook-shaped member can be bent to reduce the turning radius of the entire hook-shaped member. can be prevented.

It is a perspective view which shows an example of a temporary bolt unnecessary joining apparatus. It is a perspective view which shows an example which attached the temporary bolt unnecessary joining apparatus to the beam steel frame. It is the perspective view seen from the lower side for demonstrating the joining structure of the beam steel frame and the bracket of a steel-frame column which attached the temporary bolt unnecessary joining apparatus. FIG. 11 is a side view showing a state in which a steel frame column is slightly over-aligned with a bracket in the transfer direction of the beam steel frame, viewed from the bracket side. FIG. 10 is a side view illustrating a state in which the positioning function of the detent mechanism is seen from the bracket side in a state where the beam steel frame has slightly overshot the position of the bracket of the steel frame column in the moving direction of the beam steel frame. FIG. 10 is a side view showing a state in which the end portions of the beam steel frame and the bracket are aligned by positioning the retaining mechanism, and the joining pin is attached to the bolt hole on the bracket side. It is a perspective view explaining the state in which the beam steel frame to which the temporary bolt unnecessary joining apparatus was attached was hung with the temporary suspension scaffolding. FIG. 10 is a side view for explaining the positional relationship between the ceiling bar of the temporary suspended scaffold hung between the splice plate of the beam steel frame to which the temporary bolt-free joining device is attached and the steel frame column, and the detent mechanism. FIG. 10 is a side view for explaining a state in which the hook-shaped member is started to rotate about the shaft portion so as to separate from the joint pin in the hook-shaped member rotating step; In the hook-shaped member rotating step, the connecting pin rotates the tip of the hook toward the L-shaped portion and bends the hook-shaped member, while reducing the radius of rotation of the entire hook-shaped member, thereby making the temporary suspended scaffolding. It is a side view explaining the state which the hook-shaped member is trying not to contact with the ceiling bar. FIG. 11 is a side view illustrating a state in which the entire hook-shaped member finishes passing through the top bar of the temporary suspension scaffold while the hook-shaped member is bent so as not to come into contact with the top bar. FIG. 11 is a side view for explaining a state in which the joint pin of the temporary bolt unnecessary joint device in which the hook-shaped member is bent is detached from the steel frame column and the beam steel frame.

The temporary bolt unnecessary joining device 1 shown in FIG. 1 is a device used for connecting the steel frame column 9 and the beam steel frame 8 shown in FIGS. A joint pin 12 that hangs down in length and a retaining mechanism 2 for the joint pin 12 are provided.

The base plate 10 is, for example, a plate that is made of steel or the like, has a rectangular shape in a plan view, and has an upper surface 101 and a lower surface 100 that are formed into flat surfaces by rounding the four corners into arcs. Note that both ends of the base plate 10 may be rounded in an arc shape.

A joint pin 12 is integrally suspended from the lower surface 100 of the base plate 10 with a predetermined length in the vertical direction (−Z direction). The joint pin 12, which has a circular cross section, has, for example, a lower end tapered over a required range around the tip. It is easy to insert into the bolt hole 910 of 91. For example, the pin diameter (cross-sectional diameter) of the joint pin 12 is larger than the diameter of the bolt hole 910 of the bracket 91 of the steel frame column 9 shown in FIG. Although it is set to be slightly small, it may be of a size that provides a clearance of about 1 mm to 2 mm with respect to the bolt holes 910 and 843 .

In the present embodiment, the retaining mechanism 2 shown in FIG. 1 is arranged at an intermediate position in the longitudinal direction (Y-axis direction) of the base plate 10, but is not limited to this, and is located either in the longitudinal direction of the base plate 10. It may be disposed at a position closer to that end.
The detachment prevention mechanism 2 is a support projection 20 disposed on the upper surface 101 of the base plate 10 and a direction orthogonal to the hanging direction (Z-axis direction) of the joining pin 12 in the horizontal plane (X-axis Y-axis plane) (Fig. 1 A shaft portion 21 disposed on the support projection 20 with the Y-axis direction as the axial direction, and a hook that is urged toward the outer surface 122 of the joint pin 12 and can rotate about the shaft portion 21 as an axis. a shaped member 24;

The support projections 20 are a pair of projecting plates 202 and 203 erected at a longitudinal intermediate position on the upper surface 101 of the base plate 10. A hook-like member 24 is inserted between the projecting plates 202 and 203. A gap is provided. A shaft portion insertion hole (not shown) is formed through the projection plate 202 and the projection plate 203 in the thickness direction (Y-axis direction), and the shaft portion 21 is inserted through the shaft portion insertion hole.

In this embodiment, the shaft portion 21 is a fixing bolt that is inserted through a shaft portion insertion hole (not shown). It is fixed to the protrusion plate 202 and the protrusion plate 203 by screwing a fixing nut (not shown).

The hook-shaped member 24 includes a hook tip portion 241 that contacts the outer surface 122 of the joint pin 12, an L-shaped portion 243 that is rotatably attached to the shaft portion 21, a lower end side of the L-shaped portion 243, and a hook. A connecting pin portion 245 that connects the upper end side of the tip portion 241 and serves as an intermediate portion of the hook-shaped member 24 is provided.

A shaft portion insertion hole (not shown) is formed through the L-shaped portion 243, which is located on the upper side of the hook-shaped member 24 and has a substantially L-shaped side view, in the thickness direction (Y-axis direction). is inserted in the gap between the projection plate 202 and the projection plate 203, the shaft portion 21 is inserted through the shaft portion insertion hole (not shown). For example, a bearing or the like (not shown) may be provided between the fixing bolt that is the shaft portion 21 and the L-shaped portion 243 .

A connecting pin portion 245 is disposed on the lower end side of the L-shaped portion 243. For example, the connecting pin portions 245 rotate clockwise or counterclockwise about the Y axis when viewed from the side. It consists of a possible first pin 2451 and a second pin 2452 . In this embodiment, for example, a gear 246 is formed on the lower end side of the L-shaped portion 243 and a through hole (not shown) is formed. is formed and a through hole (not shown) is formed, and the gear 246 and the gear 247 are meshed with each other. The connecting pin portion 245 having such a configuration can fix the hook tip portion 241 to the L-shaped portion 243 by opening outward, for example.

The gear 246 may not be formed at the lower end of the L-shaped portion 243, and the gear 247 may not be formed at the upper end of the hooked portion 241. The upper ends of the portions 241 may be rounded in an R shape, and may be in rotatable contact with each other. In this case, the connecting pin portion 245 can be in a free state without fixing the hook tip portion 241 to the L-shaped portion 243 .

As shown in FIG. 1, the lower end side of the L-shaped portion 243 and the upper end side of the hooked portion 241 are provided with plate-like connecting members 248 and 249 along their respective side surfaces. A first pin 2451 is arranged so as to pass through the connecting member 248 and the lower end side of the L-shaped portion 243 and the connecting member 249 . A second pin 2452 is arranged to pass through a through hole (not shown) and the connecting member 249 . For example, the tip of the first pin 2451 (second pin 2452) is threaded, a nut 2453 (nut 2454) is screwed on the thread, and the degree of tightening of the nut 2453 (nut 2454) , it is possible to adjust the easiness of rotation of the hook tip portion 241 with respect to the L-shaped portion 243 .

The hook tip portion 241 has a partially inclined surface on the side of the hook portion 241 that contacts the outer side surface 122 of the joint pin 12 and faces the outer side surface 122 . The hook-shaped member 24, which is rotatable about the shaft portion 21, is always urged toward the outer surface 122 of the joint pin 12, that is, urged in the closing direction. In addition, since a part of the surface of the hook portion 214 that contacts the outer side surface 122 of the joint pin 12 is an inclined surface, the steel column 9 shown in FIG. As a result, the hook-shaped member 24 can automatically rotate outward (toward the side away from the outer side surface 122 of the joint pin 12) around the shaft portion 21 as an axis.
The surface of the hook portion 241 that contacts the outer surface 122 of the joint pin 12 may be rounded into a substantially arc shape.

For example, in the present embodiment, on both end sides of the base plate 10 shown in FIGS. Holes 15 are provided respectively, and in the example shown in FIGS. 1 and 2, a mounting bolt 32 is previously mounted in one of the bolt mounting holes 15, preferably from the bottom to the top, and a tightening nut 34 is mounted. It is attached to the temporary bolt unnecessary joining device 1 by being screwed from above.

The operation of the temporary bolt unnecessary joining device 1 shown in FIG. 1 when temporarily connecting the steel frame column 9 and the beam steel frame 8 shown in FIG. 3 using the temporary bolt unnecessary joining device 1 will be described below.
In this case, in order to join and connect the horizontally protruding bracket 91 (see FIG. 3) of the steel frame column 9 and the beam steel frame 8, for example, while the beam steel frame 8 shown in FIG. A splice plate 84 protrudes in advance by a required length and bolts 133 are attached to the connecting ends of the beam steel frame 8 so that the bolt holes 843 of the splice plate 84 and the bolt holes 80 of the beam steel frame 8 are inserted. A plurality of bolt holes 843 corresponding to the bolt holes 910 formed in the bracket 91 are also provided on the side of the splice plate 84 connected to the bracket 91 shown in FIG.

Furthermore, the end portions on both sides of the projecting portion projecting in the extending direction (−Y direction) of the beam steel frame 8 from the end portion of the beam steel frame 8 of the splice plate 84 shown in FIG. In , the joint pin 12 and the retaining mechanism 2 of one temporary bolt-free joining device 1 are attached to the side surface on the -X direction side). That is, by inserting the mounting bolts 32 into the bolt holes 843 of the splice plate 84 and firmly tightening the tightening nuts 34, for example, from the upper side, the temporary bolt unnecessary joining device 1 is fixed to the beam steel frame 8 via the splice plate 84. .

The joint pin 12 of the temporary bolt unnecessary joint device 1 attached to the beam steel frame 8 on the ground through the splice plate 84 in this manner is inserted through the bolt hole 843 of the splice plate 84 . In addition, the hook-like member 24 of the detent mechanism 2 has a connecting pin portion 245 that is straight in the Z-axis direction (vertical direction), and is biased toward the outer surface 122 of the joining pin 12 to move the hook tip portion 241 . contacts the outer surface 122 .

In this way, for example, the beam steel frame 8 to which the temporary bolt unnecessary joining device 1 is attached on the ground is lifted by a required crane (lifting device) and installed (constructed), that is, the steel frame shown in FIG. It is transported in the air between the pillars 9 and slowly descended in the same direction between the steel pillars 9, but it cannot be connected unless the directionality and position of the bracket 91 of the steel pillar 9 completely match.

Here, the temporary bolt unnecessary joining device 1 functions. As an example, the temporary bolt-free joining device 1 is arranged at least in the horizontal direction (X-axis and Y-axis directions) on one side of the bracket 91 behind the transfer direction (arrow A direction) of the beam steel frame 8 shown in FIG. It is attached to the flange portion in which the overhang bolt hole 910 is formed. The position shown in FIG. 4 shows a state in which the beam steel frame 8 has slightly gone too far in the +X direction. As shown in FIG. 5, the flange portion of the bracket 91 on the side of the steel frame column 9 comes into contact with the inclined contact surface of the hook portion 241 of the retaining mechanism 2 from below. The hook-like member 24 of the stop mechanism 2 opens a little outward, but the slanted abutment surface causes the beam steel frame 8, which has slightly gone too far, to slowly return, while the hook tip 241 again moves to the joining pin. Since the beam steel frame 8 is lowered while rotating around the shaft portion 21 so as to contact the outer surface 122 of the bracket 91, the tapered tip portion of the joint pin 12 even slightly enters the bolt hole 910 on the bracket 91 side. After that, the beam steel frame 8 is guided by the tapered portion so that the joint pin 12 enters the bolt hole 910. Therefore, simply lowering the beam steel frame 8 allows the bracket 91 and the beam to be connected as shown in FIG. The end portions of the steel frame 8 abut each other, and are linearly installed in contact with the lower surface of the splice plate 84 .

By installing in this way, the joint pin 12 can be attached to the bolt hole 910 of the bracket 91 without using a temporary bolt that requires troublesome work, and the hook of the hook-shaped member 24 of the retaining mechanism 2 can be installed. The tip portion 241 is positioned below the upper flange portion of the bracket 91 and is in contact with the outer surface 122 of the joint pin 12 . Therefore, even if a large earthquake causes a large up-and-down vibration in this state, or if it is blown by a strong wind, the presence of the hook-shaped member 24, that is, the shear force of the joining pin 12 will cause the seismic load or the wind to move. Since it resists the horizontal force of the load, the joint pin 12 does not slip out of the bolt hole 910, so even if it receives a large horizontal shake after that, the beam installed by the joint pin 12 and the retaining mechanism 2 will not come off. The steel frame 8 can stay at the installation position without falling off. Furthermore, even if a horizontal force acts on the joint pin 12, the hook-shaped member 24 of the retaining mechanism 2 is in contact with the outer surface 122 of the joint pin 12, so that the hook-shaped member 24 resists the horizontal force. As a result, the connection pin 12 is prevented from slipping out.

For example, the temporary bolt unnecessary joining device 1 according to the present invention is in a state in which the joining pin 12 is inserted into at least the bolt hole 910 of the flange portion of the bracket 91 of the steel frame column 9, for example, and set vertically as shown in FIG. The light 16 shown in FIGS. 1 and 2 that lights up when the hook-shaped member 24 is in contact with the joint pin 12 may be provided on the side of the hook tip 241, for example. The light 16 makes it possible to visually confirm that the retaining mechanism 2 is functioning.

After that, the worker installs the required connecting bolts (not shown) in the bolt holes 843 of the splice plate 84 and the corresponding bolt holes 910 of the bracket 91 to connect them. By removing the mounting bolt 32 and lifting the whole while rotating the retaining mechanism 2 to the outside as will be described later in detail, the joint pin 12 is inserted into the bolt hole 910 of the bracket 91 and the bolt hole 843 of the splice plate 84. , the temporary bolt-free joining device 1 can be completely removed. After removal, connecting bolts (not shown) are inserted into the bolt holes 843 and the bolt holes 910 in the same manner as described above and tightened. A splice plate 84 is also arranged from both sides on the lower flange portion of the H steel and the vertical steel portion of the connecting portion between the bracket 91 and the connecting bolts in the bolt holes 843, 80 and 910, respectively. By mounting, the beam steel frame 8 can be safely and firmly mounted between the steel frame columns 9. - 特許庁

When removing the steel frame column 9 from the bracket 91 and the splice plate 84 of the temporary bolt-unnecessary joining device 1, in order for the worker to climb to a relatively high height position where the temporary bolt-unnecessary joining device 1 is installed, A foldable temporary suspension scaffolding 7 is hung on the beam steel frame 8 and the bracket 91 (not shown in FIG. 7) by combining a plurality of rod-shaped members (plurality of bars) as shown in 7 .

For example, the temporary hanging scaffolding 7 made of duralumin is Tobik (trade name) manufactured by Nisso Sangyo Co., Ltd., and a part thereof is shown in FIG. The temporary suspended scaffolding 7 is composed of a plurality of foldable rod-shaped members on a plate (not shown) on which a worker can ride, and can form a hollow working room into which the worker can enter. . In FIG. 7, a rod-shaped longitudinal aggregate 70 extending in the Z-axis direction of the temporary suspended scaffolding 7, a top bar 72 connected to the upper end side of the longitudinal aggregate 70 using a bolt 701, and a bolt A lower bar 74 connecting the movable bar 73 and a plate (not shown), and a movable bar 73 connected using 701 and allowing the entire temporary suspended scaffold 7 to be folded into a folded state and a state of use as shown in FIG. and

When the temporary suspended scaffolding 7 is spread out so that a worker can get on it and hung on the beam steel frame 8 as shown in FIG. become positioned. In the conventional temporary bolt unnecessary joining device (see, for example, Patent Document 2), when the temporary bolt unnecessary joining device is removed from the splice plate 84 or the like, the top bar 72 and the hook-shaped member contacting the joining pin come into contact with each other. Because of this, the temporary suspended scaffolding 7 needs to be replaced. On the other hand, in the temporary bolt-free joining device 1 according to the present invention, the above contact interference does not occur during the removal and removal work, as will be described below.

Below, a temporary suspended scaffolding 7 formed of a plurality of rod-shaped members is hung, and a steel frame column 9 (not shown in FIG. 7) that is connected and fixed using the temporary bolt unnecessary joining device 1 shown in FIG. and the beam steel frame 8, the removal method for removing the temporary bolt-unnecessary joining device 1 will be described.

(1) Hook-shaped member turning process In the removal method according to the present invention, first, the splice plate 84 of the beam steel frame 8 and the bracket 91 of the steel frame column 9 (not shown in FIG. 7) to which the temporary bolt unnecessary joining device 1 is attached. A worker on the temporary suspended scaffolding 7 that has been hung from the bottom (shown in the figure) approaches the retaining mechanism 2 in the state shown in FIG. 8 .

For example, the operator loosens the tightening condition of the nut 2453 (the nut 2454 ) so that the hook tip 241 can be easily rotated with respect to the L-shaped portion 243 . Then, as shown in FIG. 9, the operator grasps the hook tip portion 241 and rotates the hook-shaped member 24 in the direction of arrow R around the shaft portion 21 so as to separate from the outer surface 122 of the joining pin 12. start moving. Then, as shown in FIG. 9, the L-shaped portion 243 of the hook-shaped member 24 begins to pass under the top bar 72 of the temporary suspended scaffolding 7 without coming into contact with it.
(2) Hook-shaped member bending process

Next, as shown in FIG. 10, the operator applies force to the connecting pin portion 245, which is the intermediate portion of the hook-shaped member 24, so that the hook tip portion 241 is moved toward the L-shaped portion 243 by the connecting pin portion 245. The rotation radius of the entire hook-shaped member 24 is made small so that the hook tip 241 of the hook-shaped member 24 does not contact the top bar 72, and the shaft portion 21 of the hook-shaped member 24 is rotated. Rotation in the direction of arrow R continues to be executed.

In a conventional joining device that does not require temporary bolts, such as that disclosed in Patent Document 2, the hook-shaped member cannot be bent, and the turning radius of the hook-shaped member cannot be reduced. Therefore, if the hook-shaped member comes into contact with the top bar 72 of the temporary suspension scaffolding 7 and the temporary suspension scaffolding 7 is not replaced, the splice plate 84 of the beam steel frame 8 and the steel frame column 9 can be joined by a device that does not require temporary bolts. could not be removed. On the other hand, as shown in FIG. 10, the temporary bolt unnecessary joining device 1 according to the present invention can prevent the hook-shaped member 24 from coming into contact with the top bar 72, thereby eliminating the replacement work. I can do it.

As shown in FIG. 11 , the operator further rotates the hook tip portion 241 toward the L-shaped portion 243 using the connecting pin portion 245 so that the rotation radius of the entire hook-shaped member 24 is adjusted to the top bar 72 . Conventionally, the hook-shaped member 24 contacts the top bar 72 by rotating the hook-shaped member 24 about the shaft portion 21 in the direction of the arrow R while reducing the size of the hook-shaped member 24 so that it does not come into contact with the top bar 72 . It is possible to finish passing the hook tip portion 241 below the top bar 72 .

(3) Detachment process Further, as shown in FIG. 12, after the entire hook-shaped member 24 has passed under the top bar 72, the operator applies force to the hook-shaped member 24 to the connecting pin portion 245 to remove the hook tip portion. 241 is rotated toward the L-shaped portion 243 so that the hook tip portion 241 is folded toward the L-shaped portion 243 . Then, the operator removes the mounting bolt 32 in the temporary bolt-free joining device 1 and lifts the entire retaining mechanism 2 in the +Z direction, so that the joining pin 12 is installed in the bolt hole 910 of the bracket 91 and the bolt hole of the splice plate 84. 843, the temporary bolt unnecessary joining device 1 can be completely removed without contacting the temporary suspended scaffolding 7. - 特許庁

As described above, the temporary bolt unnecessary joining device 1 according to the present invention used for joining the steel frame column 9 and the beam steel frame 8 includes the base plate 10 and the joining pin 12 that hangs down by a predetermined length on the lower surface side of the base plate 10. and a retaining mechanism 2 for the joining pin 12, the base plate 10 has a bolt mounting hole 15 in which a mounting bolt 32 for attaching to the beam steel frame 8 can be mounted, and the retaining mechanism 2 is the upper surface 101 of the base plate 10 a support projection 20 disposed on the support projection 20, a shaft portion 21 disposed on the support projection 20 with the direction orthogonal to the hanging direction (for example, the vertical direction) of the joint pin 12 as the axial direction, and the shaft portion 21 as an axis a hook-shaped member 24 that is biased toward the outer surface 122 of the joint pin 12 and is rotatable; An L-shaped portion 243 rotatably attached to the shaft portion 21 , and a connecting pin portion that connects the lower end side of the L-shaped portion 243 and the upper end side of the hooked portion 241 and serves as an intermediate portion of the hooked member 24 . 245 , the connecting pin portion 245 rotates the hook tip portion 241 toward the L-shaped portion 243 to bend the hook-shaped member 24 , thereby reducing the rotation radius of the hook-shaped member 24 as a whole. Therefore, when the retaining mechanism 2 is removed from the steel frame column 9 or the beam steel frame 8, it is possible to prevent the retaining mechanism 2 from interfering with the top bar 72 or the like of the temporary suspended scaffolding 7 called a tobik, for example. becomes possible. Therefore, the number of replacement work of the temporary suspended scaffolding 7 can be reduced, the work at height of the worker is reduced, the safety is improved, and the work efficiency is improved.

A temporary bolt-unnecessary joining device 1 is removed from a steel frame column 9 and a beam steel frame 8 connected and fixed using a temporary bolt-unnecessary joining device 1 to which a temporary suspended scaffolding 7 formed of a plurality of rod-shaped members is hung. The removal method according to the present invention includes a hook-shaped member rotating step of rotating the hook-shaped member 24 of the temporary bolt unnecessary joining device 1 about the shaft portion 21 so as to separate from the joining pin 12, and a hook-shaped member rotating step. In the process, a hook-shaped member bending step of bending the hook-shaped member 24 while rotating the hook tip portion 241 toward the L-shaped portion 243 by the connecting pin portion 245, and a temporary bolt-free joining in which the hook-shaped member 24 is bent. By providing a detachment step of detaching the joint pin 12 of the device 1 from the steel frame column 9 and the beam steel frame 8, the hook-shaped member 24 can be bent and the turning radius of the entire hook-shaped member 24 can be reduced. Therefore, it is possible to prevent the retaining mechanism 2 from interfering with the bar or the like of the temporary suspension scaffolding 7 .

1: Temporary bolt unnecessary joining device 10: Base plate 100: Lower surface of base plate 101: Upper surface of base plate 15: Bolt mounting hole 32: Mounting bolt 34: Tightening nut 12: Joint pin 122: Outer surface of joint pin 2: Retaining mechanism 20 : Support protrusions 202, 203: Projection plate 21: Shaft 211: Fixing bolt 212: Washer 213: Fixing nut 24: Hook-shaped member 241: Hook tip 247: Gear 243: L-shaped part 246: Gear 245: Connecting pin Part 2451: First pin 2452: Second pin 16: Lights 248, 249: Connecting member 9: Steel frame column 90: Bolt hole 8: Beam steel frame 80: Bolt hole 84: Splice plate 843: Bolt hole

Claims (3)

A temporary bolt unnecessary joining device used for connecting a steel frame column and a beam steel frame,
A base plate, a joint pin hanging down by a predetermined length on the lower surface side of the base plate, and a retaining mechanism for the joint pin,
The base plate has bolt mounting holes into which mounting bolts for mounting to the beam steel frame can be mounted,
The retaining mechanism includes a support projection provided on the upper surface of the base plate, a shaft portion provided on the support projection with an axial direction perpendicular to the hanging direction of the joining pin, and a shaft portion. a hook-shaped member that is rotatable while being biased toward the outer surface of the joint pin,
The hook-shaped member includes a hook tip portion that contacts the outer surface of the joint pin, an L-shaped portion that is rotatably attached to the shaft portion, a lower end side of the L-shaped portion, and the hook tip portion. a connecting pin portion that connects the upper end side of the
Temporary bolt-free joining device capable of reducing the turning radius of the entire hook-shaped member by rotating the hook tip toward the L-shaped portion by the connecting pin to bend the hook-shaped member. . A light is provided that lights up when the hook-shaped member is in contact with the joint pin in a state in which the joint pin is inserted into at least the bolt hole of the steel frame column and set vertically, and the light is used to turn on the detent mechanism. 2. The temporary bolt-free joining device according to claim 1, wherein it is possible to visually confirm that the is functioning. A temporary suspended scaffolding formed of a plurality of rod-shaped members is hung from the steel frame column and the beam steel frame, which are connected and fixed using the temporary bolt unnecessary joining device according to claim 1 or claim 2. , Claim 1, or Claim 2. A removal method for removing the temporary bolt-free joining device according to claim 1,
a hook-shaped member rotating step of rotating the hook-shaped member of the temporary bolt unnecessary joining device about the shaft portion so as to separate from the joining pin;
In the hook-shaped member rotating step, a hook-shaped member bending step of bending the hook-shaped member while rotating the hook tip portion toward the L-shaped portion by the connecting pin portion;
and a removing step of removing the joint pin of the temporary bolt-free joining device in which the hook-shaped member is bent from the steel frame column and the beam steel frame.

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