JP7625246B2 - Suspended scaffolding with side scaffolding and mounting hardware used therefor - Google Patents

Description

The present invention relates to a suspended scaffold with side scaffolding and mounting brackets used therefor, which are used in construction and repair work on elevated expressways, bridges, etc.

Traditionally, suspended scaffolding has been used in construction and repair work on the undersides of elevated expressways, bridges, etc. In other words, suspended scaffolding is formed by fixing multiple chains to bridge girders, connecting scaffolding plates to the bottom ends of these chains, and sequentially connecting multiple scaffolding plates in the horizontal direction (see Patent Document 1).

For safety reasons, scaffolding was erected as walls on the sides of the suspended scaffolding that formed the floor. The scaffolding used on the sides was usually made of the same materials as the suspended scaffolding that made up the floor. In other words, scaffolding boards were connected vertically to form scaffolding on the sides as well. However, the scaffolding boards, which are made of aluminum, are heavy and difficult to install, and the work is complicated and requires specialized knowledge. In addition, the scaffolding boards block light, making the work site dark and reducing workability.

Patent No. 6685630

The objective of the present invention is to provide a suspended scaffold with side scaffolding that is lightweight, easy to install, and allows sufficient lighting, and the mounting hardware used therefor.

The suspended scaffolding with side scaffolding of the present invention comprises a suspended scaffolding body suspended from above, a side scaffolding erected on a side of the suspended scaffolding body, a first mounting bracket connecting the suspended scaffolding body and the side scaffolding, and a tubular member disposed on the side of the suspended scaffolding body and extending along the side. The suspended scaffolding body is made of a plurality of scaffolding plates connected in a plate-like shape, and a hanging bracket for attaching a hanging tool for suspending the suspended scaffolding body is attached so as to be able to freely enter and leave through a hole formed on the surface of the scaffolding plate. The side scaffolding comprises a plurality of posts erected at a predetermined interval on the side of the suspended scaffolding body, and a handrail stretched between adjacent posts. The first mounting bracket includes a base disposed on the suspended scaffolding body, a pole holder provided on the base and holding the lower end of the pole, a clamp provided on the base for fixing the tubular member, and a fixing part for fixing the base to the suspended scaffolding body. The base has a groove with which the suspension bracket protruding from the hole in the suspended scaffolding body engages .

The first mounting bracket of the present invention is used to erect a pillar on the side of a suspended scaffolding main body suspended from above, and comprises a base arranged on the suspended scaffolding main body, a pillar holding part provided on the base and to which the lower end of the pillar is attached, a clamp provided on the base and fixing a tubular member extending along the side of the suspended scaffolding main body, and a fixing part provided on the base and fixing one end of the base to the scaffolding main body, and has a groove at the other end of the base with which a hanging bracket protruding from the suspended scaffolding main body engages.
The second mounting bracket of the present invention comprises a base arranged on the suspended scaffolding main body, a fixing part for fixing one end of the base to the scaffolding main body, and a clamp for fixing a tubular member provided on the base and extending along the side of the suspended scaffolding main body.
The third mounting bracket of the present invention is a third mounting bracket for erecting a pillar on the side of a suspended scaffolding main body suspended from above, and comprises a base arranged on the suspended scaffolding main body, a pillar holding part provided on the base and holding the lower end of the pillar, and a clamp provided on the base and fixing a tubular member extending along the side of the suspended scaffolding main body.

The suspended scaffolding with side scaffolding of the present invention is lightweight and allows for sufficient lighting, as the side scaffolding is erected on the side of the suspended scaffolding main body suspended from above and is composed of a number of posts erected at predetermined intervals and handrails stretched between adjacent posts.
In addition, since the mounting bracket of the present invention comprises a base attached to the suspended scaffolding main body and a pillar holding portion provided on this base and to which the lower end of the pillar is attached, the side scaffolding can be easily constructed and does not require specialized skills, improving the workability of assembling the suspended scaffolding.

FIG. 1 is a schematic explanatory diagram showing a state in which a suspended scaffolding according to one embodiment of the present invention is installed under an expressway. FIG. 2 is a perspective view showing the attached state of a side scaffold in one embodiment of the present invention. FIG. 13 is a front view showing an example of a side scaffold. A plan view showing an example of the use of the first mounting bracket for attaching a side scaffolding. FIG. 4 is a side view showing the first mounting fitting in use. FIG. 4 is a front view showing the first mounting fitting in use. FIG. 4 is a schematic perspective view showing a state in which the first mounting fitting is used. 1A and 1B are a front view and a side view, respectively, showing an example of a joint for attaching a support pole. 1A is a plan view showing an example of a block holding a hanging fitting built into a scaffolding board, and FIG. 1B is a cross-sectional view taken along line A-A'. 13A and 13B are a plan view and a side view, respectively, showing an example of a second mounting fitting. 13A and 13B are a plan view and a side view, respectively, showing an example of a third mounting fixture. 13 is a plan view showing an example of a state in which the fourth mounting fitting is used. FIG. FIG. 10B is a side view of the mounting bracket shown in FIG. 10A. FIG. 10B is a front view of the mounting bracket shown in FIG. 10A.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fixing device according to an embodiment of the present invention will now be described with reference to the drawings.
Fig. 1 shows a state in which a suspended scaffolding 1 according to this embodiment is constructed under an elevated bridge 100 of a highway. In the suspended scaffolding 1, a suspended scaffolding body 11 constituting the floor surface is suspended by a chain 2 from a girder 101 made of an I-shaped steel attached under the elevated bridge 100. In addition, as shown in the figure, the suspended scaffolding body 11 is also directly suspended from under the elevated bridge 100.

A side scaffold 3 is erected on the side of the suspended scaffold 1. The side scaffold 3 ensures the safety of the worker M working on the suspended scaffold 1, and by attaching a work scaffold 4, the worker M can climb onto the work scaffold 4 and carry out repair work on the side of the viaduct 100. The side scaffold 3 is reinforced with a support rod 5 that is strung diagonally across the floor of the suspended scaffold 1.

The suspended scaffolding 1 of this embodiment is shown in more detail in Fig. 2. As shown in the figure, the floor surface of the suspended scaffolding body 11 is formed by connecting a plurality of scaffolding boards 6. For example, hollow members made of extruded aluminum can be used as the scaffolding boards 6. The scaffolding boards 6 can be connected to each other according to the method described in Japanese Patent No. 6685630 (Patent Document 1), for example.
Specifically, in order to connect adjacent scaffolding boards 6, a long side fixing operation hole 60 is formed on the long side of the rectangular scaffolding board 6, and a short side fixing operation hole 61 is formed on the short side. An advance/retract operation hole 62 is formed on the inside of the short side fixing operation hole 61 for advancing and retracting a fitting body (not shown) that connects to adjacent scaffolding boards 6, and a fastener (not shown) is engaged or removed from the inserted fitting body through the short side fixing operation hole 61. In addition, a metal fitting operation hole 63 is provided for operating a metal fitting when hanging the scaffolding board 6 or transporting the scaffolding board 6.

A side scaffolding 3 is erected on the side of the suspended scaffolding main body 11. As shown in Fig. 3, for example, the side scaffolding 3 includes a plurality of posts 7 erected at a predetermined interval on the side of the suspended scaffolding main body 11, a handrail 8 stretched between adjacent posts 7, 7, and a brace 9 stretched between adjacent posts 7, 7.
Here, the interval between the pillars 7, 7 is in the range of 600 mm to 1800 mm, and is usually expressed as 600 mm + (300 mm x n) (where n is an integer of 1 to 4).
The side scaffolding 3 shown in Figure 3 is what is known as a wedge-fastened scaffolding, in which the posts 7 are made of steel pipes with fastening parts 10 at regular intervals, and handrails 8, diagonal braces 9, and even the work scaffolding 4 as shown in Figure 1 are fastened to the fastening parts 10 of the posts 7 with wedges.
The side scaffolding 3 may also be a scaffolding called a frame scaffolding or a single-pipe scaffolding. A frame scaffolding is a scaffolding in which braces and the like are assembled around a building frame made of steel pipes welded into a gate shape. A single-pipe scaffolding is a scaffolding in which handrails 8, braces 9, and the like are assembled using clamps to the supports of single-pipe steel pipes.

Returning to FIG. 2, a first mounting bracket 121 is used to attach the side scaffolding 3 to the side of the suspended scaffolding main body 11. The first mounting bracket 121 includes a base 13 attached to the suspended scaffolding main body 11 and a pillar holder 14 provided on the base 13 and holding the lower end of the pillar 7.

In addition to the first mounting bracket 121, the second mounting bracket 122 and the third mounting bracket 123 are arranged along the side of the suspended scaffolding body 11. On the inside of the side scaffolding 3, a single pipe 16 (support rod) is arranged along the side of the suspended scaffolding body 11 so as to penetrate these mounting brackets 121 to 123. The single pipe 16 is arranged to ensure the mutual connection of the scaffolding boards 6 and to transmit the load to all of the multiple scaffolding boards 6 constituting the suspended scaffolding body 11, thereby avoiding localized concentration of the load. Furthermore, the single pipe 16 also plays a role of guiding when the third mounting bracket 123 described later is moved to a predetermined position, that is, to a position where the support 7 is erected.
Furthermore, in order to support the side scaffolding 3, the tip of a support rod 5 (single pipe) extending diagonally from the suspended scaffolding main body 11 is attached to the support column 7. The lower end of the support rod 5 is fixed to and supported by the suspended scaffolding main body 11 by a fourth mounting bracket 124.

The first mounting bracket 121 is shown in Figures 4A to 4C and 5. As shown in Figures 4A, 4B and 5, the upper surface of the base 13 of the first mounting bracket 121 is provided with a fixing portion 17, a stopper 18, a support pole holding portion 14 and a single pipe clamp 19 (support rod fixing portion) in that order from the side of the suspended scaffolding main body 11.

The fixing portion 17 fixes the first mounting bracket 121 to the scaffolding board 6, and includes a frame member 17a with a U-shaped cross section and a screw 17c that screws into a screw hole 17b of the frame member 17a. The frame member 17a has a lower end surface joined to the base 13 by welding or the like, and is also joined to the adjacent stopper 18 by welding or the like. As shown in Figures 4B and 4C, the screw 17c is configured to pass through through holes formed in the base 13 and the scaffolding board 6, respectively, and to screw into a nut 20 inside the scaffolding board 6, which is a hollow shaped member. Therefore, when the screw 17c is rotated so as to be pulled upward, the nut 20 is strongly pressed against the inner wall of the scaffolding board 6, and the first mounting bracket 121 can be fixed to the scaffolding board 6.

The stopper 18 is for supporting the support column 7 connected to the support column holding portion 14 .
The support column holder 14 is made up of two rising pieces 14a that face each other with a predetermined gap between them, and each of the rising pieces 14a has a through hole 14b for inserting a screw or a pin (not shown) horizontally. The support column holder 14 is attached to the base 13 by, for example, welding, bolting, or the like.

As shown in FIG. 5, the joint 23 is connected to the support pole holding part 14, and the support pole 7 is connected and supported via this joint 23. That is, the joint 23 has a plate-shaped mounting part 231 at the lower end, and this mounting part 231 is inserted between the two rising pieces 14a, 14a of the support pole holding part 14, and the through hole 231a (see FIG. 6) formed in the mounting part 231 is aligned with the through holes 14b, 14b, and a pin, bolt, etc. (not shown) is inserted into the through holes 231a, 14b, 14b to connect them. At this time, the stopper 18 prevents the joint 23 from falling over.

As shown in Figs. 6(a) and (b), the joint 23 comprises a cylindrical main body 232, a cylindrical support outer insertion part 233 partially fitted into the cylindrical main body 232, and a plate-like body 234 having the above-mentioned mounting part 231 protruding from the cylindrical main body 232 and held within the support outer insertion part 233. As shown in Fig. 6(b), the cylindrical main body 232 is formed with two through holes 232a, 232b penetrating in the radial direction. A through hole 233a is also formed in the support outer insertion part 233 along the axial direction from the through hole 232a.

The long axis portion of a generally J-shaped pin 235 is inserted into the two through holes 232a, 232b. At that time, the pin 234 also passes through the through hole of the plate-like body 234. In addition, the short axis portion of the pin 235 is configured to be insertable into the through hole 233a of the column outer insertion portion 233.
A coil spring 236 is fitted onto the pin 235 in the cylindrical body 232, and biases the pin 235 towards one of the through-holes 232b. In this state, as shown in FIG. 6B, a tip 235a of the long axis portion of the pin 235 protrudes from the cylindrical body 232, and a tip 235b of the short axis portion is inserted into the through-hole 233a of the support outer insertion portion 233.

When connecting the support post 7 to the joint 23, the tip 235a of the long shaft portion of the pin 235 is pushed in with a finger or the like against the biasing force of the coil spring 236, pushing up the pin 235 and disengaging the tip 235b of the short shaft portion from the through hole 233a of the support post outer insertion portion 233. In this state, the support post 7 is inserted onto the outer circumferential surface of the support post outer insertion portion 233. At this time, the through hole (not shown) formed in the support post 7 is aligned with the through hole 233a of the support post outer insertion portion 233, and then the finger or the like is released to return the pin 235 to its original position, thereby connecting and fixing the support post 7 to the support post outer insertion portion 233.
When removing the support 7, the tip 235a of the long shaft portion of the pin 235 is pressed again with a finger or the like to push up the pin 235, and the support 7 is removed from the outer circumferential surface of the support outer insertion portion 233.

Returning to FIG. 5, the single pipe clamp 19 is used to secure and support the single pipe 16, and is configured to clamp the single pipe 16 between two clamping pieces and then tighten with a bolt 191 and a nut 192. The single pipe clamp 19 is attached to the base 13 with a bolt 21.

A groove 22 is formed at the tip of the base 13, i.e., the tip opposite to the fixed part 17, and the hanging fitting 15 is configured to engage with this groove 22. The hanging fitting 15 is formed of a ring having an oval shape or the like, and is used to attach the lower end of the chain 2 for suspending the suspended scaffolding main body 11, as shown in FIG. 2. Since the hanging fitting 15 engages with the groove 22, the first mounting fitting 121 can be reliably fixed at a position perpendicular to the single pipe 16. In particular, when the screw 17c is screwed into the screw hole 17b of the frame material 17a in the fixed part 17 and tightened tightly, if one of the first mounting fittings 121 shifts and is no longer perpendicular to the single pipe 16, the single pipe 16 cannot be inserted, so that the installation work of the suspended scaffolding cannot be performed smoothly, which causes an obstacle to the work.
In contrast, if the hanging bracket 15 is engaged with the groove portion 22, even if the screw 17c is screwed into the screw hole 17b of the frame material 17a and tightened tightly, the first mounting bracket 121 can be reliably aligned perpendicular to the single pipe 16, thereby improving work efficiency.

7(a) and (b), the hoisting fitting 15 is held so as to be freely retractable within a block 24 built into the scaffolding board 6. Specifically, the block 24 includes two mold members 241, 242 that are fixed with a gap formed between them, and a rotating support shaft 243 that is disposed inside the mold members 241, 242 so as to cross the gap between the two mold members 241, 242, i.e., the fitting operation hole 244. The block 24 is built into the scaffolding board 6 and fixed with rivets, bolts, nuts, etc. (not shown).
In addition, a notch 245 is formed in part of the metal fitting operation hole 244 for inserting a tool to pull out the hanging fitting 15 .

The first mounting brackets 121 are attached to the suspended scaffolding body 11 at predetermined intervals along the side of the suspended scaffolding body 11 (see FIG. 2). In addition to the first mounting brackets 121, second mounting brackets 122 and third mounting brackets 123 are attached to the suspended scaffolding body 11 along the side of the suspended scaffolding body 11. In addition, a first mounting bracket 121', which is a modified version of the first mounting bracket 121, is also attached. The first mounting bracket 121' shown in FIG. 2 is the same as the first mounting bracket 121, except that it does not have the strut support portion 14.

Figures 8(a) and (b) are a plan view and a side view, respectively, showing an example of a second mounting bracket 122. This second mounting bracket 122 has the same functions as the first mounting bracket 121, except that it does not have the function of supporting the support pole 7 in the first mounting bracket 121 or the function of engaging and holding the hanging bracket 15 in the groove 22 at the tip. In other words, the second mounting bracket 122 has, on a base 131, the same fixing part 17 as the first mounting bracket 121, and a single pipe clip 19 that holds the single pipe 16. As the rest is the same as the first mounting bracket 121, the same reference numerals are used and explanations are omitted.

9(a) and (b) are a plan view and a side view, respectively, showing an example of a third mounting bracket 123. This third mounting bracket 123 has the same functions as the first mounting bracket 121, except that it does not have the base fixing function of the first mounting bracket 121 (i.e., the fixing part 17 having the frame material 17a and the screw 17c that screws into the screw hole 17b of the frame material 17a) and the function of fixing and holding the mounting bracket by engaging the hanging bracket 15 with the groove 22 at the tip. That is, like the first mounting bracket 121, it has, on the base 132, a stopper 18, the pillar support part 14 of the first mounting bracket 121, and a single pipe clip 19 that holds the single pipe 16, in that order from the side.

The third mounting bracket 123 is attached to the single pipe 16 by the single pipe clamp 19. The third mounting bracket 123 has a support pole holder 14, which allows the support pole 7 to be erected in any position. Therefore, the support poles 7 can be erected according to the spacing between the support poles 7 described above. As the rest of the structure is the same as the first mounting bracket 121, the same reference numerals are used and the description is omitted.

10A, 10B, and 10C are respectively a plan view, a side view, and a front view showing an example of the fourth mounting bracket 124. As described above, the fourth mounting bracket 124 is for fixing the support rod 5 made of a single pipe or the like for supporting the support column 7 to the scaffolding board 6. A plate portion 25 is erected on the base 133 on the scaffolding board 6, and a clamp 26 is attached to this plate portion 25 by bolting. The plate portion 25 is attached to a fixing portion 27. The fixing portion 27 is fixed by screwing a bolt 271 inserted through a through hole provided in a base having a U-shaped cross section into a nut 272 built into the scaffolding board 6.
Since the clamp 26 is rotatable about the mounting portion 273, the inclination angle of the support rod 5 can be freely adjusted. The clamp 26 can be the same as the single pipe clamp 19 described above.

In this way, by preparing the first mounting bracket 121, 121', the second mounting bracket 122, the third mounting bracket 123 and the fourth mounting bracket 124, any mounting bracket can be selected according to the mounting position of the side scaffolding 3, and the side scaffolding 3 can be easily constructed. Since no specialized skills are required, the workability of assembling the suspended scaffolding 1 is improved.

Although the above describes the suspended scaffolding according to an embodiment of the present invention, the present invention is not limited to the above embodiment, and various improvements and modifications are possible. For example, it is not necessary to use all of the first mounting brackets 121, 121', the second mounting bracket 122, and the third mounting bracket 123, and only one or two of them may be used, such as only the first mounting brackets 121, 121', as necessary.

1 Suspended scaffold 2 Chain (suspension device)
[0033] 3 Side scaffolding 4 Working scaffolding 5 Support rod 6 Scaffolding board 7 Support 8 Handrail 9 Brace 10 Fastening part 11 Suspended scaffolding body 13, 131, 132, 133 Base 14 Support holding part 15 Suspension fitting 16 Single pipe (tubular member)
17 Fixing portion 17a Frame material 17b Screw hole 17c Screw 18 Stopper 19 Single pipe clamp 20 Nut 21 Bolt 22 Groove portion 23 Joint 24 Block 121 First mounting bracket 122 Second mounting bracket 123 Third mounting bracket 124 Fourth mounting bracket

Claims (7)

A suspended scaffold body that is suspended from above and forms a floor;
A side scaffold erected on the side of the suspended scaffold body;
A first mounting bracket that connects the suspended scaffolding main body and the side scaffolding;
A tubular member is disposed on the side of the suspended scaffolding body and extends along the side ,
The suspended scaffolding body is composed of a plurality of scaffolding plates connected in a plate shape, and a hanging fitting for attaching a hanging tool for hanging the suspended scaffolding body is attached so as to be able to freely appear and disappear from a hole formed on the surface of the scaffolding plate,
The side scaffolding includes:
A plurality of pillars erected at predetermined intervals on the side of the suspended scaffolding body;
A handrail is provided between adjacent columns,
The first mounting bracket includes:
A base disposed on the suspended scaffolding body;
a support column holder provided on the base and holding a lower end of the support column;
a clamp provided on the base and configured to fix the tubular member;
A fixing part that fixes the base to the scaffolding body,
A suspended scaffold having a side scaffold, characterized in that the base has a groove portion into which the hanging hardware protruding from the hole in the suspended scaffold main body engages . The suspended scaffolding of claim 1, further comprising a second mounting bracket having a base disposed on the suspended scaffolding body, a fixing portion for fixing the base to the scaffolding body, and a clamp provided on the base for fixing the tubular member . The suspended scaffolding according to claim 2 , wherein a plurality of the first and second mounting brackets are attached to the suspended scaffolding body at predetermined intervals along a side of the suspended scaffolding body. The suspended scaffolding described in claim 1 further comprises a third mounting bracket having a base disposed on the suspended scaffolding body , a pillar holding portion provided on the base for holding the lower end of the pillar, and a clamp provided on the base for fixing the tubular member. A first mounting bracket for erecting a support on a side of a suspended scaffolding body suspended from above,
A base disposed on the suspended scaffolding body;
a support column holder provided on the base and to which a lower end of the support column is attached;
A clamp provided on the base and fixing a tubular member extending along a side of the suspended scaffolding body;
A fixing part is provided on the base and fixes one end of the base to the scaffolding body,
A first mounting bracket characterized in that the other end of the base has a groove portion into which a hanging bracket protruding from the suspended scaffolding main body engages. A base disposed on the suspended scaffolding body;
A fixing part that fixes the base to the suspended scaffolding body ;
A second mounting bracket comprising: a clamp provided on the base and configured to secure a tubular member extending along the side of the suspended scaffolding body. A third mounting bracket for erecting a support on a side of a suspended scaffolding body suspended from above,
A base disposed on the suspended scaffolding body;
a support column holder provided on the base and holding a lower end of the support column;
A clamp provided on the base and fixing a tubular member extending along a side of the suspended scaffolding body;
A third mounting bracket comprising:

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