JPH0759850B2 - Mounting bracket for hanging frame scaffolding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a suspension frame scaffold for working in a stage until a floor is formed inside a construction site where a steel beam such as an H-shaped net is assembled. More specifically, the present invention relates to a mounting bracket for a scaffolding scaffold that can be easily and reliably locked to a flange of H-section steel in accordance with different flange widths and thicknesses of H-section steel.

[Prior Art] When constructing a building, as shown in FIG. 10, steel frame beams (1) made of H-shaped steel are assembled in a grid at predetermined intervals. Then, at the stage until the floor is formed, an operator performs a work such as passing a steel frame on the tread (2) as shown in FIG. The tread (2) is installed on the lateral members (3a) of a pair of U-shaped suspension frame scaffolds (3) arranged so as to surround the steel beam (1) below and on both sides. The suspension frame scaffold (3) includes, in addition to the horizontal member (3a), a connecting member (3b) (3b) welded so as to extend upward from an intermediate portion of the horizontal member (3a) and a horizontal member (3a). ) Vertical members (3c) (3c) extending upward from both ends of
Composed of and. The connecting members (3b) (3b) are hung on a bracket (4) welded to the lower surface of the steel beam (1). That is, the bracket (4) is provided with a connecting hole,
Connect the connecting hole and the connecting member (3b) (3b) to the bolt (5).
Fasten according to (5). Vertical members of suspension frame scaffolds (3) (3
A handrail (6) is erected on c) for the safety of workers.

[Problems to be Solved by the Invention]

The operator on the tread (2) is supported by the bracket (4). Therefore, the bracket (4) must be securely welded so as not to come off from the steel beam (1). Welding is impossible for an untrained person and requires an expert.

However, it is not easy to arrange a skilled person, even if
Even if an expert can be arranged, the work of facing upward and welding the bracket (4) to the lower surface of the steel beam (1) is very complicated.

Further, even if a skilled person welds, the welding strength may vary depending on the welding conditions, resulting in defective welding. Welding defects are difficult to detect visually and may sometimes come off when an impact load is applied. Then, the suspension frame scaffolding (3) falls, and the worker is at risk.

Further, the tread (2) has different lengths depending on whether it is a metric type or a foot type. However, after welding the bracket (4), the mounting position cannot be changed and the tread (2)
There is also the trouble of having to weld according to the type.

In view of this problem, the present applicant has already applied for "mounting metal fittings for suspension frame scaffolding" in Japanese Patent Application No. 1-35700 (see Japanese Patent Publication No. 6-100023).

However, this application "mounting bracket for hanging frame scaffolding"
Variations in the flange thickness of the steel beam (1) could not be reliably accommodated, and there was a problem that it could not be removed when attached to the SRC structure.

Therefore, an object of the present invention is to provide a mounting bracket for a scaffolding scaffold that reliably copes with variations in the flange width and the flange thickness of the steel frame beam and that can be detached from the steel frame beam of the SRC structure. .

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention comprises first and second frames that join the lower side and form a connecting hole, and separate the upper side to form an insertion portion, and slide horizontally in the insertion portion. A pair of hooks that move and are positionally controlled by stoppers, a hook shaft that stands upright on the outer end of each hook, and is threaded with a bolt toward the inside of the upper end, and a vertical position by a nut that passes through the bolt. And a deformed polygonal cam plate fixed to both ends of a cam shaft that penetrates inward of the cam case in the width direction, and guides in the length direction of the hook. A hole is bored, an engaging pin is provided on the lower side of the inner end, a square bolt penetrating the guide hole is fastened to both ends of the insertion part, and the lower length of the insertion part is Direction, an engaging hole for introducing the engaging pin is bored, and in the front surface of the insertion portion. A screw protruding from the stopper, a long hole penetrating the screw is formed in the center of the stopper, and a corrugated locking portion for fitting an engaging pin is formed on the lower surface of the stopper. The stopper is fixed by screwing a wing nut onto the screw.

[Action]

The lower flange of the steel beam composed of H-shaped steel is
And the upper surface of the second frame and the pair of stoppers and the lower surface of the cam plate. The hook is moved according to the flange width of the H-section steel. At this time, the engaging pin formed in the hook fits into the engaging portion of the stopper, and the hook is fixed. Further, the cam plate is rotated according to the flange thickness of the H-section steel. The variation in flange thickness is dealt with by moving the cam case through the bolt up and down and tightening the nut.

〔Example〕

An embodiment according to the present invention will be described with reference to FIGS. 1 to 9.

The mounting bracket of the suspension frame scaffolding (3) according to the present invention includes an insertion portion (1
0) forming first and second frames (11) (12),
A pair of hooks (20) (2) that slide in the insertion part (10).
0) and the outer ends (20a) (20) of the hooks (20) (20)
Cam group (30) (30) and hook (20) (2) to be placed in a)
0) It is composed of a stopper that regulates the position.

The lower sides of the first and second frames (11) (12) are joined and fastened by a pair of bolts (13) (13), and a pair for suspending the connecting members (3b) (3b). Connection hole (1
4) Drill (14). First and second frames (11) (1
The upper side of 2) is spaced apart to form the insertion part (10). Square bolts (15) (15) are fastened to both ends of the insertion part (10) to keep the intervals of the insertion part (10) constant. Insertion part (1
A small hole [not shown] is bored in the first and second frames (11) and (12) at the center of the first frame (11).
Install the screw (16) in the small hole of. The screw (16) is caulked and fixed on the inner surface of the first frame (11) so that the screw (16) does not fall off the first frame (11) and become lost. First and second frames (11) of the lower part of the insertion part (10)
Two engaging holes (17) and (17) are formed in the (12) from the vicinity of the center to the outer end.

As shown in FIG. 4, the hook (20) sliding in the insertion part (10) has a box shape and allows the square bolt (15) to pass therethrough, but a guide hole (21) is bored in the longitudinal direction. The lower end of the inner edge (20
In a), an engagement pin (22) formed of a spring pin introduced into the engagement hole (17) is projected. The lower end of the hook shaft (23) is fixed to the outer end (20b) of the hook (20) by hollow thin round rivets (24) (24). The upper end of the hook shaft (23) is eccentric toward the inside, and the bolt (25)
Screw.

As shown in FIG. 4, a cam group (30) is attached to the bolt (25). The cam group (30) is constructed by assembling the following parts. That is, the top plate (31a) of the U-shaped downward cam case (31) is inserted through the bolt (25),
Tighten the nut (32). The chamfered cam shaft (33) is passed through the inner sides of both side plates (31b) (31b) of the cam case (31). Fine grooves (33a) (33a) are formed near both ends of the cam shaft (33). At both ends of the cam shaft (33), polygonal cam plates (34) (34) deformed at non-equal distances from the cam shaft (33) are mounted. Between the cam plate (34) and the side plate (31b) of the cam case (31), a nylon washer (3
5) is interposed, and the outside of the cam plate (34) has an E-ring (3
Fit 6) into the narrow groove (33a) so that it will not come off. Since the two cam plates (34) (34) are mounted on the chamfered cam shaft (33), they rotate together. Cam plate (34) (3
The rotation of 4) changes the distance between the bottom surfaces of the cam plates (34) (34) and the top surfaces of the first and second frames (11) (12) to accommodate various flange thicknesses. be able to. However, the interval can be adjusted by vertically moving the cam case (31) by mounting the cam case (31) on the bolt (25) of the hook shaft (20).

To accommodate various flange widths, the hook (20) having the cam group (30) mounted thereon is slid in the insertion portion (10). The position of the hook (20) is restricted by a stopper (40) as shown in FIG. On the lower surface of the stopper (40), a corrugated locking portion (41) into which the engaging pin (22) protruding from the hook (20) is fitted is formed. In the central portion (40a) of the stopper (40), upper and lower elongated holes (42) penetrating the screws (16) protruding from the first frame (11) are formed. A wing nut (43) is screwed onto the tip of the screw (16) protruding from the surface of the stopper (40). By tightening the wing nut (43), the stopper (40) is fixed, and by loosening the wing nut (43), the stopper (40) moves up and down while being restricted by the long hole (42). Stopper (4
On both sides of the long hole (42) of (0), ribs (44) (4
4) project. The ribs (34) (34) allow the stopper (3
0) is reinforced, and the stopper (30) can be easily pushed up by putting a finger on the rib (34). When the stopper (30) is pushed up, the locking part (31)
Is disengaged from the engaging pin (22), and the hook (20) can be slid.

The mounting bracket of the suspension frame scaffold (3) according to the present invention is configured as described above, and then the usage method thereof will be described.

First, a method of associating the mounting bracket with the flange width of the steel beam (1) made of H-shaped steel will be described with reference to FIGS. 5 and 6.

By moving the pair of hooks (20) (20) according to the flange width, the spacing between the pair of cam plates (34) (34) is changed from the most widened state shown in FIG. 5 to that shown in FIG. Change gradually until the most contracted state shown. Pair of hooks (20)
To move (20), loosen the wing nut (43), put your finger on the rib (34), and move the stopper (4) as shown in FIG.
0) Increase. Then, the engaging pins (22) and (22) protruding from the hooks (20) and (20) are engaged with the engaging portions (41) of the stopper (40).
And the hooks (20) (20) are free to move. Therefore, the pair of hooks (20) (20) correspond to the flange width, and the engaging pins (22) (22) have corrugated locking portions (41).
Move to fit. Thereafter, as shown in FIG. 6, the stopper (40) is lowered, the wing nut (43) is tightened, and the hooks (20) (20) are fixed. Engagement pin (22)
Since the (22) is fitted in the locking part (41) of the stopper (40), the hooks (20) (20) do not slide laterally.

Next, a method of associating the mounting bracket with the flange thickness of the steel beam (1) will be described with reference to FIGS. 1 and 6 to 9.

When the bottom surface of the cam plate (34) is made the shortest from the cam shaft (34), the thickest flange (1a) can be held as shown in FIG. Connect the bottom of the cam plate (34) to the cam shaft (3
When the length is the longest from 4), the thinnest flange (1a) can be held, as shown in FIG. The illustrated cam plate (34) can support six types of flange thickness.

However, the flange thickness has a tolerance of about 1 mm, and there are variations, and it is difficult to safely and completely comply with the flange thickness simply by rotating the cam plate (34). That is,
If the flange thickness is less than the reference thickness, the flange (1
A gap is formed between the bottom surface of a) and the top surfaces of the first and second frames (11, 12). Then, the worker will work on the rattling tread (2), which causes the worker to have a fear. On the contrary, when the flange thickness is thicker than the reference thickness, the cam plate (34) cannot hold the flange (1a).

In this mounting bracket, the cam case (31) is mounted on the bolt (25) of the hook shaft (23) and fixed by the nut (32), so that variations in flange thickness can be dealt with. Details will be described with reference to FIGS. 7 to 9.

When the cam (34) does not clamp the flange (1a),
As shown in FIG. 7, the top plate (31a) of the cam case (31)
Is supported by the shoulder portion (23a) which is the base of the bolt (25) of the hook shaft (23). When sandwiching the cam plate (34) on the flange (1a), as shown in FIG. 8, the cam case (31) is raised and the bottom surface of the cam plate (34) and the first and second frames (11) ( The flange (1a) of the steel beam (1) is interposed between the upper surface and the upper surface of (12). At this time, there is a gap between the top plate (31a) of the cam case (31) and the nut (32). Then, as shown in FIG. 9, the nut (32) is tightened, and the flange (1a) is attached to the bottom surface of the cam plate (34) and the first and second frames (11) and (12).
Fix it to the upper surface of. Therefore, the mounting bracket can be locked and fixed to the flange (1a) regardless of variations in the flange thickness.

In this way, a pair of mounting brackets are fixed corresponding to the length of the metric or foot type tread (2).

When an operator rides on the tread (2), the hook shaft (23) (23)
The cam plates (34) (34) are also subjected to a reaction from the flanges (1a) (1a) at the same time as the state of being pushed downward. Therefore, a moment is generated between the bolt (25) of the hook shaft (23) and the cam plate (34). However, since the bolts (25) of the hook shaft (23) are unevenly distributed near the cam plate (34), the moment can be reduced.

On the tread (2), the operator goes around the steel beam (1) around the reinforcing bar, and then removes the mounting bracket fixed to the flange (1a) as follows. On both sides of the cam group (30),
The hooks (20) because the rebar is swirled.
Can not be moved outward. So, the nut (3
Remove 2) from the bolt (25) of the hook shaft (23). Then, the cam chase (31) can be pulled out from the nut (32), and the cam groups (30) (30) are separated from the first and second frames (11) (12). Therefore, the first and second
The frames (11) (12) and so on are moved to the lower side of the steel beam (1), and the mounting bracket is removed from the steel beam (1).

The above is a description of an embodiment of the present invention, and the present invention is not limited to this embodiment, and design changes can be made within the scope of the present invention.

〔The invention's effect〕

According to the present invention, by moving the hook, the interval between the pair of cam plates can be changed, so that various flange widths can be dealt with.

In addition, since the cam plate has a deformed polygonal shape, it is possible to cope with various flange thicknesses.

Further, since the cam plate is mounted on the cam case which can be adjusted up and down, the cam plate can be securely mounted even if the flange thickness varies. It can also be applied to the SRC structure.

[Brief description of drawings]

1 is a front view according to the present invention, FIG. 2 is a plan view of the same,
FIG. 3 is a side view of the same, FIG. 4 is a partially exploded perspective view of a hook and a cam group, FIGS. 5 and 6 are front views for explaining a usage example, and FIGS. 7 to 9 are usage examples. It is a side view for explaining. Figure 10 is a schematic perspective view of a construction site using suspension frame scaffolding,
FIG. 11 is a perspective view showing a state in which a suspension frame scaffold is used by a conventional mounting bracket. (1) …… Steel beam, (3) …… Suspended frame scaffold, (10) …… Insert part, (11) …… First frame, (12) …… Second frame, (14) …… Connection hole, (15) …… square bolt, (1
6) …… screw, (17) …… engagement hole, (20) …… hook,
(20a) …… Lower inner surface, (20b) …… Outer end, (22) ……
Engagement pin, (23) …… Hook shaft, (25) …… Bolt,
(31) …… Cam case, (34) …… Cam plate, (40) ……
Stopper, (40a) …… Center part, (41) …… Locking part, (4
2) …… Long hole, (43) …… wing nut.

Claims (1)

[Claims] 1. A first frame and a second frame which are joined at their lower sides to form a connecting hole and which are separated from each other at their upper sides to form an insertion portion, and slide horizontally in the insertion portion by a stopper. A pair of hooks whose position is regulated, a hook shaft which is erected on the outer end of each hook and in which a bolt is threaded toward the inside of the upper end, and a downward direction in which the nut penetrates the bolt and the vertical position is regulated by a nut The cam case includes a U-shaped cam case, and deformed polygonal cam plates fixed to both ends of a cam shaft that penetrates inward of the cam case in the width direction. A guide hole is formed in the hook length direction. And an engaging pin protruding downward from the inner end of the insertion portion, a square bolt penetrating the guide hole is fastened to both ends of the insertion portion, and the engagement pin is provided in the lower longitudinal direction of the insertion portion. An engaging hole for introducing a dowel pin is bored, and a screw is provided at the center of the front surface of the insertion portion, A long hole penetrating the screw is formed in the center of the stopper, and a corrugated locking portion for fitting an engaging pin is formed on the lower surface of the stopper, and a wing nut is screwed into the screw. The metal fittings for the scaffolding frame are characterized by fixing the stoppers.