JP2021139168A - Suspended scaffolding - Google Patents

Abstract

To provide a suspended scaffolding that can be easily lifted without using horizontal lumber.SOLUTION: A rectangular suspended scaffolding 10 comprises: a rectangular frame 13 composed of X beams 11 in the longitudinal direction arranged to face each other and Y beams 12 arranged to face the X beams in a perpendicular direction; and a deck plate 14 laminated on the upper surface of the frame. Hanging brackets are embedded inside the X beams so as to freely retract without detaching easily. A head part of the hanging bracket is equipped with a fall prevention stopper to prevent falling into the X beam. A foot part of the hanging bracket is equipped with a pull-up stopper that stops pulling-up from inside the X beam. When the hanging brackets are pulled up, the pull-up stopper can be lifted in close contact with the ceiling of the X beam.SELECTED DRAWING: Figure 1

Description

The suspended scaffold of the present invention relates to a suspended scaffold used by suspending the girders, balustrades, etc. downward from the girders, balustrades, etc. in highway construction, bridge construction, building construction, and the like.

In various constructions and civil engineering works such as construction of highways and bridges, scaffolding called suspension scaffolding is often made, and construction work and repair work are often carried out on it.
As this hanging scaffold, for example, there are the following.
A scaffolding board such as plywood or wire mesh is attached on a rectangular frame-shaped frame by passing a connecting tool between two base materials facing each other at appropriate intervals, and a scaffolding is used as a scaffolding suspended from a support material. There is a plate connector or a ring attached to a round pipe that is locked and hung under the support material.
Such a scaffolding board can be connected to another scaffolding board while being connected and fixed in the front-rear and left-right directions by a connecting tool so that a suspended scaffolding having a desired width and a desired shape can be constructed.
Construction of such a suspended scaffold is carried out as follows.
First, a chain suspension clamp is attached at a position facing the support members such as two girders, and the chain is suspended from the clamp.
The chain is hung on a connecting tool or a locking ring of the frame body, and the frame body is hung between the support members.
Next, an operator rides on the scaffolding plate attached to the frame body, attaches another clamp to the tip of the support material, and hangs the chain to it.
This chain is hung on a connector or a locking ring of another frame body, and the frame body is hung next to the frame body suspended earlier.
The connector attached to the frame body suspended later is connected and fixed to the frame body suspended first, and the two frames are connected and fixed in the width direction.
The hanging scaffold is assembled by repeating such work.
As a prior art of such a suspended scaffold, for example, Patent Document 1 (Patent No. 5097313) is available.
In Patent Document 1, scaffolding boards are interconnected to form a work floor, and a plurality of horizontal members are horizontally connected to the upper side of the scaffolding boards to reinforce the scaffolding boards, and the scaffolding boards are placed below the horizontal members. A suspension scaffold is described, which is provided with a suspension tool for suspending the horizontal member and is composed of a hanging metal fitting for suspending the horizontal member by the rope of the lifting machine.
However, such a method of erection of a suspended scaffold has the following problems.
The scaffolding board is suspended under the horizontal member by the suspension member connected to the horizontal member, or after the scaffolding board is suspended from the structure or the structure, the suspension member is released and the horizontal member is released. It was a cumbersome task to remove the lumber, and the scaffolding of the worker could get caught in the horizontal lumber and cause an accident.

Japanese Patent No. 5097313

However, the suspended scaffold described in Patent Document 1 has the following problems.
That is, the rope is pulled upward by the lifting machine to raise the suspension scaffolding to the aerial work platform as a whole, the scaffolding board is suspended from the structure or the structure, and then the suspension tool is released to hang it horizontally. Since the lumber must be removed, these operations are troublesome, it takes a lot of time and effort to complete, the cost is increased accordingly, and the entire construction period is lengthened to temporarily install this suspended scaffold.
In addition, the same work is required when removing the scaffolding.
Therefore, an object of the present invention is to provide a suspended scaffold that can be easily lifted without using a horizontal member in order to solve the above problems.
That is, the object of the invention is to provide a suspended scaffold that has high work safety, good workability, and allows even an inexperienced person to easily construct a suspended scaffold in a short period of time, which is cheaper and more durable. To provide a hanging scaffold.
Another object of the present invention is to provide a suspended scaffold for directly attaching and connecting a connecting tool to a beam constituting a frame body.

The suspended scaffold of the present invention has the following features.
(1) A rectangular frame composed of an X beam in the longitudinal direction arranged to face each other and a Y beam arranged to face the X beam in a direction perpendicular to the X beam, and laminated on the upper surface of the frame. A rectangular hanging scaffold with a deck plate
The hanging metal fittings are embedded inside the X-beam so that they can freely appear and disappear and do not come off.
The head of the hanging bracket is provided with a fall prevention stopper that prevents the hanging metal fitting from falling into the X beam.
The foot of the hanging bracket is provided with a pulling stop stopper that stops pulling from inside the X beam.
It is characterized in that when the hanging metal fitting is pulled up, the pulling stop stopper is lifted in a state of being in close contact with the ceiling of the X beam.
(2) In the above (1), the hanging metal fitting has a first through hole formed in its head and a second through hole formed in its foot, and the second through hole has a second through hole. Is characterized in that the pull-up stop stopper is fitted.
(3) In the above (1), the X-connected suspended scaffold is characterized in that the suspended scaffold is connected in the X direction.
(4) In the above (1), the Y-connected suspended scaffold is characterized in that the suspended scaffold is connected in the Y direction.
(5) In the above (1), the XY connection suspension scaffold is characterized in that it is connected in the X direction and the Y direction.

The suspended scaffold of the present invention can be easily lifted without using a horizontal member, and since the connecting tool is directly attached to the beam constituting the frame to connect, the work safety is high, the workability is good, and the short term is short. Even an inexperienced person can easily construct a hanging scaffold in between, and it can be a cheaper and more durable hanging scaffold.
Further, by embedding the hanging metal fitting in the X beam, the bulkiness can be reduced during storage, and there is no risk of collapse.

The suspension scaffold of the first embodiment, (a) is a front view, and (b) is a back view. It is the schematic which showed an example of the hanging metal fitting, (a) is the front view which looked at the state which the head 21 of the hanging metal fitting was exposed from the upper surface of the X beam 11 in the X direction, (b) is (a). Is a side view seen in the Y direction, and (c) is a front view showing a state in which the hanging metal fitting is embedded in the X beam 11. It is the suspension scaffold of the second embodiment, (a) is a front view, and (b) is a back view. It is explanatory drawing which shows the procedure of X connection. It is an X connector used for connecting the X beam, (a) is a perspective view, and (b) is a cross-sectional view. The suspension scaffold of the third embodiment, (a) is a front view, and (b) is a back view. It is explanatory drawing of Y connector (for end connection), (a) is a sectional view, (b) is a top view. It is explanatory drawing of the intermediate Y connecting tool, (a) is a cross-sectional view, (b) is a top view. It is the suspension scaffolding (four XY connection) of Embodiment 4, (a) is a front view, and (b) is a back view.

<Embodiment 1>
<Basic suspension scaffolding 10>
FIG. 1 shows a suspended scaffold of the first embodiment (also referred to as a basic suspended scaffold 10).
(A) is a front view and (b) is a back view.
The basic suspension scaffold 10 of the first embodiment is composed of an X beam 11 extending in the longitudinal direction (X direction) and a Y beam 12 extending in the width direction (Y direction), forming a rectangular frame 13. A deck plate 14 serving as a scaffolding plate is laminated on the surface of the frame body 13.
In the first embodiment, two X beams 11 are arranged at the upper and lower ends (in FIG. 1) of the basic suspension scaffold 10 so as to extend in the X direction, and the Y beam 12 is the X beam 11. At the left and right ends (in FIG. 1) in the direction perpendicular to the above, two are arranged so as to extend in the Y direction so as to face each other.
A rectangular frame 13 is formed by the X beam 11 and the Y beam 12.
Examples of the size of the basic suspension scaffold 10 include those formed in a rectangular size (for example, a horizontal length of 4850 mm and a vertical width of 2000 mm) on which a person can ride.
As shown in the back view of FIG. 1B, the frame body 13 is provided with a plurality of U-shaped cross-section square timbers 15 arranged in a vertical and horizontal lattice pattern at predetermined intervals in the middle portion thereof to reinforce the frame body 13. It can also be arranged as appropriate.
Examples of the X-beam 11 and the Y-beam 12 include angle steel, channel steel, channel steel, and the like. Among them, a square pipe having a square cross section having a strength capable of withstanding a high load is preferable.

Examples of X-beam dimensions include cross-sectional width of 75 mm, height of 150 mm, and length of 4850 mm, and examples of Y-beam dimensions include cross-sectional width of 75 mm, height of 125 mm, and length. The one having a height of 1850 mm can be mentioned.
Such a size is an example and is appropriately determined according to the implementation situation.

<Deck plate 14>
The deck plate 14 that covers the upper surface of the frame body 13 serves as a scaffolding plate, has appropriate strength so as not to bend even if a person or equipment is placed on the frame body 13, and is welded, bolted, or riveted to the frame body 13. It is fixed by means such as.
Examples of the deck plate 14 include metal plates such as galvanized steel plates and aluminum alloy plates, expanded metals, and the like, which are appropriately determined according to the implementation situation.

An opening 11a for projecting the hanging metal fitting 20 attached for lifting the scaffolding panel 10 is provided on the upper surface of the X beam 11.

<Hanging bracket 20>
FIG. 2 shows an example of the hanging metal fitting of the present invention.
(A) is a front view of the state in which the head 21 of the hanging bracket is exposed from the upper surface of the X beam 11 in the X direction, and (b) is a side view of (a) in the Y direction.
(C) is a front view showing a state in which the hanging metal fitting is embedded in the X beam 11.
Since the hanging scaffold 10 is used by being suspended below a bridge girder or the like, a hanging metal fitting 20 for lifting by a lifting machine or the like is provided.
That is, the X-beam 11 in the longitudinal direction constituting the suspension scaffold 10 is provided with a hanging metal fitting 20 for connecting a rope such as a chain suspended from a support material such as a girder of a bridge. It is designed so that it can be locked.

<Fall prevention stopper 22>
The hanging metal fitting 20 is embedded inside the X beam 11 so as to be able to appear and disappear and not to be separated. 22 is provided, and the foot portion 23 is provided with a pulling stop stopper 24 for stopping pulling from the inside of the X beam 11.
That is, the fall prevention stopper 22 of the head 21 expands the upper end of the head 21 on both sides to provide an enlarged portion 22a, and the dimension of the enlarged portion 22a is adjusted to the size of the opening 11a provided on the upper surface of the X beam 11. By making it larger than the dimension, the head 21 is prevented from passing through the opening 11a on the upper surface of the X beam 11 and falling into the X beam 11.

<Hanging bracket head 21>
The fall prevention stopper 22a of the head 21 of the hanging metal fitting has an inverted trapezoidal shape in the embodiment, and when the head 21 of the hanging metal fitting is embedded in the X beam 11, the diagonal lower surface 22b and the upper surface of the X beam 11 are formed. A gap can be formed between the and.
As a result, a hook or the like is hung on the diagonal lower surface 22b to facilitate pulling up of the hanging metal fitting 20 embedded in the X beam 11.
The head 21 of the hanging metal fitting is provided with a first through hole 25 used for hooking a chain hook or the like via a shackle to lift the hanging scaffold.

<Pull-up stop stopper 24>
The foot portion 23 of the hanging metal fitting 20 is provided with a pull-up stop stopper 24 for stopping the hanging metal fitting 20 from coming out of the X beam 11.
In the embodiment, the pull-up stop stopper 24 is a prismatic rod-shaped body fitted into the second through hole 26 provided in the foot portion 23.
Since the upper surface of the prismatic rod-shaped body is flat, the pulling stop stopper 24 brings the pulling stop stopper 24 into close contact with the ceiling back 11g of the upper frame of the X beam 11 when the hanging metal fitting 20 is pulled up. The entire hanging scaffold 10 is lifted.
The size and shape of the pull-up stop stopper 24 shall be such that it does not pass through the opening 11a provided on the upper surface of the X beam 11.
Further, the pull-up stop stopper 24 also has an appropriate mass because it also serves as a weight for pulling the hanging metal fitting 20 downward and burying it in the X beam 11.
When the pull-up stop stopper 24 is not in use, the hanging metal fitting 20 is embedded in the X beam 11, so that the hanging scaffold 10 is not exposed to the upper surface or the lower surface, so that work safety can be ensured. ing.
Further, when the hanging scaffolds 10 are stacked and stored, the bulk due to the exposure of the hanging metal fittings 20 does not increase, and there is no risk of collapse during stacking.
Since the pull-up stop stopper 24 also supports the scaffolding panel 10 when it is lifted, it needs to have a strength that can withstand the load.
In the embodiment, a quadrangular prism made of solid steel is fitted into the second through hole and welded and fixed.
One surface (upper surface) of the prism is in close contact with the ceiling back 11g of the upper frame of the X beam 11.

<Embodiment 2>
<X connection suspension scaffolding 30>
FIG. 3 shows a suspended scaffold (also referred to as an X-connected suspended scaffold) of the second embodiment in which X-connection is performed.
That is, the X-connected suspension scaffold 30 is the suspension scaffold according to claim 1 connected in the X direction, and the X-connection suspension scaffold 30 of the second embodiment is the X beam 11 of the two basic suspension scaffolds 10. The ends 11c and 11d are butted against each other and connected in the X direction via the X connector 40.
Next, a procedure for forming the X-connected suspension scaffold 30 will be described with reference to the cross-sectional view of FIG.
First, as shown in FIG. 4A, the left end 40a of the X connector 40 is previously fitted into the right end 11c of the X beam 11 of one basic suspension scaffold 10a, and the other suspension scaffold 10b (additional) to be connected. The left end 11d of the X beam 11 (also referred to as the suspension scaffold 10b) is fitted into the right end 40b of the X connector 40 and connected.

FIG. 4B shows a state in which the left end 11d of the X beam 11 of the additional suspension scaffold 10b to be connected is fitted to the outside of the X connector 40 fitted to the right end 11c of the X beam 11 of the basic suspension scaffold 10a. show.

In FIG. 4 (c), the two basic suspension scaffolds 10a and the additional suspension scaffold 10b are X-connected by tightening the connection bolt 42 that penetrates the X beam 11 and the X connector 40 that are X-connected in the vertical direction. A state in which X is connected and fixed using the tool 40 is shown.

<X connector 40>
FIG. 5 shows a connector having a C-shaped cross section as an example of the X connector 40. (A) is a perspective view, and (b) is a cross-sectional view.
Examples of the X connector 40 include angle steel, channel steel, channel steel (steel material obtained by processing a thin plate material such as C-shaped steel and C-chan into a C shape) and the like. Among them, C-shaped steel with a C-shaped cross section is
It is a channel steel formed by processing a thin plate material into a C-shaped cross section, and a groove portion 43 in which a part of a vertical portion is cut out is formed.
Since the C-shape is deformed due to the reduction of the groove portion 43, even if there is a slight difference in the inner dimensions of the X beam 11, the X connector 40 can be fitted inside the X beam 11.
Further, even if there is a protrusion or the like inside the X beam 11, the groove 43 can avoid the protrusion and fit the X connector 40, which is preferable.
As described above, a plurality of basic suspended scaffolds 10 can be connected in the X direction to form an X-connected suspended scaffold 30 having a large area.

<Embodiment 3>
<Y connection suspension scaffolding 50>
FIG. 6 shows a suspended scaffold (also referred to as a Y-connected suspended scaffold 50) of the third embodiment in which Y-connection is performed. (A) is a front view and (b) is a back view.
The Y connection means that two basic suspended scaffolds are arranged in parallel so that the X beams come into contact with each other and are connected in the Y direction.
The Y-connected suspension scaffold 50 is obtained by connecting the suspension scaffolds described in the first embodiment in the Y direction. The X beams 11 of the two basic suspension scaffolds 10 are arranged in parallel, and the ends thereof are arranged in the Y direction. It is connected by using the Y connector 60.

<Y connector 60>
FIG. 7 shows a Y connector 60 that connects the X beams 11 to each other. (A) is a cross-sectional view, and (b) is a top view.
The Y connector 60 is provided so as to surround the outer periphery of the end portions of the two X beams 11 arranged in parallel.
That is, the Y connector 60 is composed of a concave member 61 that winds the lower part from the side surface of the X beam 11, a lid member 62 that covers the upper part of the X beam 11 inserted into the concave member 61, and a fixing bolt 63 that connects them. Become.
After inserting the ends of the two X beams 11 into the concave member 61, both ends of the lid member 62 are tightened with fixing bolts 63 so that the upper portion thereof is covered with the lid member 62.
As a result, the ends of the two X beams 11 are Y-connected and fixed via the Y-connector 60.
It is also possible to insert an intermediate bolt 64 at an intermediate position in the vertical direction of the concave member 61 to integrate the concave member 61 and the two X beams 11 to increase the strength of the Y connector 60.

<Intermediate Y connector 70>
8A and 8B are an intermediate Y-connector 70 used separately from the Y-connector 60, where FIG. 8A is a cross-sectional view and FIG. 8B is a top view.
The intermediate Y connector 70 is used when the intermediate portions of the X beam 11 are Y-connected to each other instead of connecting the ends of the X beam 11.
That is, the Y-connected suspension scaffold 50 can be more firmly connected by connecting the X-beam 11 not only at the end portion but also at the intermediate portion.
The intermediate Y connecting tool 70 used for the intermediate Y connecting utilizes the hanging metal fitting 20 housed in the X beam 11 of the two basic hanging scaffolds 10 to be connected.
That is, the intermediate Y connector 70 has an intervening member 71 interposed between the heads 21 of the two hanging metal fittings 20, and a pull-up stop fitted in the second through hole 26 of the foot portion 23 of the hanging metal fitting 20. It consists of a stopper 24.
The intervening member 71 is fixed by penetrating a bolt 72 between the two hanging metal fittings 20 and the head 21 of the 20.
As described above, a plurality of basic suspension scaffolds 10 can be connected in the Y direction to form a Y-connected suspension scaffold 50 having a large area.

<Embodiment 4>
<XY connection suspension scaffolding 80>
FIG. 9 shows a suspended scaffold of the fourth embodiment (four basic suspended scaffolds 10 are XY connected). (A) is a front view and (b) is a back view.
The suspension scaffold 80 of the fourth embodiment refers to a scaffold in which four pieces of the basic suspension scaffold 10 are connected in the X direction and two pieces are connected in the Y direction (also referred to as an XY connection suspension scaffold).
That is, the XY connection suspension scaffold 80 of the fourth embodiment is the one in which the basic suspension scaffold 10 described in the first embodiment is connected in the X direction and the Y direction.
As the connecting tool for forming the XY connecting suspension scaffold 80 of the fourth embodiment, the X connecting tool 20 and the Y connecting tool 60 used in the second and third embodiments are used.
Further, depending on the implementation situation, the intermediate Y connector 70 can also be used.
As a result, a plurality of basic suspension scaffolds 10 can be connected in the X and Y directions to form an XY connection suspension scaffold 80 having a large area.

The suspended scaffold of the present invention has high work safety and good workability, and even an inexperienced person can easily construct a suspended scaffold in a short period of time, and the suspended scaffold can be made cheaper and more durable. It can be widely used.

10 Suspended scaffolding 10a Basic suspended scaffolding 10b The other suspended scaffolding to be connected (additional suspended scaffolding)
11 X-beam 11a Opening on the upper surface of X-beam 11c Right end of X-beam 11 11d Left end of X-beam 11 11g Behind the ceiling of X-beam 11 Y-beam 13 Frame 14 Deck plate 15 Square lumber 20 Hanging bracket 21 Head 22 Fall protection Stopper 22a Enlarged portion 22b Diagonal lower surface 23 Foot portion 24 Pull-up stop Stopper 25 First through hole 26 Second through hole 30 Suspended scaffold of the second embodiment (X-connected suspended scaffold)
40 X connecting tool 40a X left end of connecting tool 40 40b X right end of connecting tool 40 41 X upper parallel part of connecting tool 42 X connecting bolt 43 groove part 50 hanging scaffolding of embodiment 3 (Y connecting hanging scaffolding)
60 Y connector 61 Concave member 62 Lid member 63 Fixing bolt 64 Intermediate bolt 70 Intermediate Y connector 71 Intervening member 72 Bolt 80 Suspended scaffold of the fourth embodiment (XY connected suspended scaffold)

The suspended scaffold of the present invention has the following features.
(1) A rectangular frame composed of an X beam in the longitudinal direction arranged to face each other and a Y beam arranged to face the X beam in a right angle direction.
The deck plate laminated on the upper surface of the frame and
A rectangular hanging scaffold with
An XY-connected suspension scaffold connected in the X and Y directions.
In the connection in the X direction, an X-connector having a C-shaped cross section having a groove portion in which a part of the vertical portion is cut out is fitted inside the X beam and connected.
The connection in the Y direction is
A concave member that winds from the side surface of the X beam to the lower part,
A lid member that covers the upper part of the X beam inserted into the concave member,
A Y connector consisting of a fixing bolt that connects these
Connected so as to surround the outer circumference of the ends of the arranged X beams,
The hanging metal fittings are embedded inside the X-beam so that they can freely appear and disappear and do not come off.
The head of the hanging bracket is provided with a fall prevention stopper that prevents the hanging metal fitting from falling into the X beam.
The fall prevention stopper has an inverted trapezoidal shape so that a gap is formed between the diagonal lower surface of the hanging metal fitting and the upper surface of the X beam when the head of the hanging metal fitting is embedded in the X beam.
The foot of the hanging bracket is provided with a pulling stop stopper that stops pulling from inside the X beam.
It is characterized in that when the hanging metal fitting is pulled up, the pulling stop stopper is lifted in a state of being in close contact with the ceiling of the X beam.
(2) In the above (1), the hanging metal fitting has a first through hole formed in the head thereof and a second through hole formed in the foot portion thereof.
The pull-up stop stopper is fitted into the second through hole.

Claims (5)

A rectangular frame composed of an X beam in the longitudinal direction arranged to face each other and a Y beam arranged to face the X beam in a direction perpendicular to the X beam, and a rectangular frame.
The deck plate laminated on the upper surface of the frame and
It is a rectangular hanging scaffold with
The hanging metal fittings are embedded inside the X-beam so that they can freely appear and disappear and do not come off.
The head of the hanging bracket is provided with a fall prevention stopper that prevents the hanging metal fitting from falling into the X beam.
The foot of the hanging bracket is provided with a pulling stop stopper that stops pulling from inside the X beam.
A hanging scaffold characterized in that when the hanging metal fitting is pulled up, the pulling stop stopper is lifted in a state of being in close contact with the ceiling of the X beam. The hanging metal fitting has a first through hole formed in its head and has a first through hole.
A second through hole is formed in the foot,
The suspension scaffold according to claim 1, wherein the pull-up stop stopper is fitted in the second through hole. An X-connected suspended scaffold according to claim 1, wherein the suspended scaffold is connected in the X direction. A Y-connected suspended scaffold according to claim 1, wherein the suspended scaffold is connected in the Y direction. An XY-connected suspension scaffold according to claim 1, wherein the suspension scaffold is connected in the X direction and the Y direction.

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