JPH09296601A - Suspended scaffolding and construction method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspended scaffolding capable of easily pulling out hanging material locking devices, having broad flexibility for handrail installation without interfering in walking or without being in danger of dropping small members out of the suspended scaffolding, facilitating joint separation work between scaffolding boards, maintaining balance of the scaffolding boards and ensuring the strength of hanging materials. SOLUTION: This suspened scaffolding is constituted of a large-sized scaffolding board 1 forming a plate body of a structural member having a large sectional efficiency and having hanging material locking devices 2 and handrail post loading section 3 thereon, joint members provided to the ends of the plate body and hanging materials for balancing the plate body by locking the upper ends of them to a structure as well as interlocking the lower ends with the hanging material locking devices 2. In that case, each of the hanging material locking devices 2 is formed as a plate having one end pivoting on a pin projected to the inside of the plate body in a turnable manner, the other end boring a hanging material insertion hole thereinto and size capable of being stored in the plate body when it is not used, the joint members are the members holding two sheathing boards brought into contact with each other by passing through holes bored into the sheathing boards of the plate body, and each of the hanging materials is an expansible bar-shaped member mounting a binding metal fixture to the upper end thereof and a hanger locking to the hanging material insertion hole to the lower end in a turnable manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension scaffold using a large scaffold plate used for reinforcement work and maintenance of a structure such as a highway and a method of erection thereof.

[0002]

2. Description of the Related Art In recent years, reinforcement work and maintenance work have been carried out over a wide range of structures such as already-used highways. In particular, in view of the devastating damage caused by the Great Hanshin-Awaji Earthquake and the trend of heavy traffic, it is required to rehabilitate low-strength structures as soon as possible. Reinforcement work such as floor slabs must be performed while securing traffic. For this reason, when performing such a construction, measures have been taken to form a work floor by attaching a hanging scaffold covering the lower surface of the bridge girder in a wide range and to prevent flying and falling objects.

A conventional suspended scaffold is constructed by assembling a single pipe suspended from a chain or the like in a lattice shape to form a suspended shelf, mounting and fixing a wooden scaffold plate thereon, installing a handrail or morning glory on a side surface, In addition, a net and a sheet were attached to the lower part to prevent falling and flying. The work of assembling and dismantling such a hanging scaffold had to rely on a special technician called a pirate occupation, which was dangerous and very inefficient.

[0004] In order to reduce the inefficiency of assembling a single scaffold member on site, there are various methods for assembling a frame body on the ground, attaching flooring and various protective works to the frame body, and then lifting and fixing it to a building. Although these have been proposed, all of these were used for repair work of lightweight materials such as painting, because they used a small-diameter steel pipe as a load supporting member and laid plywood etc. on the floor material. . However, since materials necessary for reinforcing the floor slab are steel girders and steel plates, which are heavy, efficient work could not be performed on a hanging scaffold of a component having a small cross-sectional performance.

[0005] Further, in order to improve the efficiency and safety of the suspension scaffold erection work, a scaffold structure of a large scaffold plate as described in JP-A-5-118129 has been proposed. This scaffold structure has a truss-like reinforcing bar assembly as a framework, and has a shape in which the upper surface and side surfaces are surrounded by a steel plate, and large strength and rigidity are given to the whole by the action of the reinforcing bar assembly. . Therefore, if a rebar assembly corresponding to the overload is employed, it is possible to temporarily place heavy objects.

[0006] On the upper surface of the scaffold structure, there are provided a plurality of rings, which are suspending member locking members. Wood support. Moreover, when connecting the adjacent scaffold structures, the connection pipe embedded in the end part of the scaffold structure was connected by the pipe clamp. Further, in order to provide a handrail on the scaffolding structure, a pipe support for opening the pipe insertion hole portion is fixed to the scaffolding structure, and a handrail post or the like is inserted therein.

[0007]

The ring, which is the suspending member locking device of the scaffold structure, is attached to the reinforcing bar and is housed in the scaffold structure when not in use. The ring-shaped ring had to be sandwiched and pulled out, and therefore the slit of the upper surface member had to be opened larger than the thickness of the ring. These large slits not only hinder walking, but also could cause small members to fall.

Further, since the conventional suspension scaffold has a construction in which a single pipe support is provided at the end of the scaffold structure in the short side direction,
The handrail installation position is fixed, and the handrail cannot be installed with one scaffold structure. Further, since the scaffolding structures are connected by pipe clamps, there is a drawback that the connecting and disconnecting work becomes complicated. or,
Since ropes and chains were used for the hanging materials, it was difficult to accurately level the scaffold structure, and the strength of each one was not sufficient. In addition, in the case of a suspension scaffold using a conventional scaffold structure, when the opening for carrying in the material is provided, the size is at least one panel or more, so that it is difficult to install a small opening. Further, in the conventional method for constructing a suspended scaffold using a scaffold structure, the procedure is to suspend and fix the scaffold structure and then install the handrail, which is unsafe for safety.

The present invention solves the above-mentioned problems and is provided with a suspending member locking device which is easy to pull out and which does not cause an opening in the scaffolding plate that may interfere with walking or cause a small member to fall down. It is an object of the present invention to provide a suspension scaffold provided with a suspension member that has a large degree of freedom, can easily connect and disconnect scaffold plates to each other, can accurately level the scaffold plates, and can secure strength. Further, it is an object of the present invention to provide a hanging scaffold in which a small opening can be installed even if a large scaffold plate is used and the size thereof can be freely adjusted, and to provide a safer method of constructing a hanging scaffold. .

[0010]

In order to solve the above-mentioned problems, a suspension scaffold of the present invention is a large-sized equipment having a plate member made of a member having a large cross-sectional performance and having a suspending member locking member and a handrail post mounting portion on the upper surface. In a suspension scaffolding having a scaffolding plate, a connecting member provided at an end of the plate body, and a suspending member for fastening the plate member by fastening the upper end to a structure and engaging the lower end with a suspending member locking tool, The suspending material locking device is of a size that can be housed inside the plate body when not in use by pivotally supporting one end on a pin protruding inside the plate body and pivotally supporting the suspending material insertion hole at the other end. Plate, the handrail mounting portion is a hole formed at the end of the plate body, and the connecting member sandwiches two side plates that are in contact with and penetrate the hole formed in the side plate of the plate body. The suspending member is an expandable rod-shaped member to which a binding metal fitting is attached rotatably at the upper end and a suspending member engaging with the suspending member insertion hole is rotatably attached at the lower end. It is characterized in that it is a wood.

Further, each plate of the suspension scaffold according to claims 2, 3 or 4 has steel members for girders arranged side by side in the longitudinal direction and striped steel plates fixed to the upper surface thereof, or has striped steel plates fixed in the recesses. It has a corrugated steel plate that is attached to form a flat upper surface and a plate member that is fixed to the periphery to form a side plate, or is provided with an opening portion and a divided lid material that bridges the opening portion.

The method of constructing a suspended scaffold according to claim 5 is
A large scaffolding board having a suspension member locking member on the upper surface and a handrail pillar mounting portion for a hole to be drilled at the end of the plate body is used to form a plate body having a large cross-sectional performance. With the main rope attached, it is lifted and supported from the structure.

The suspending member locking member can be rotated by pushing the end portion of the plate on the pin side to project the suspending member insertion hole side to the outside of the plate body. The upper part of the plate at the time of storage is flush with the upper surface of the plate body, and the slit to be opened is approximately the same as the thickness of the plate body, but an allowance portion is provided in the front and rear portions of the plate body for allowing rotation. Mount the handrail pillar by dropping it into the hole. The handrails can be installed in either the short side direction or the long side direction of the scaffold plate. The connecting member is attached from the opening on the upper surface of the plate body.

Since the rigidity of the plate body depends on the cross-sectional performance of the steel members for girders or the corrugated steel plates arranged in parallel in the longitudinal direction, it is appropriately selected according to the applied load. The striped steel plate installed on the upper surface of the plate body serves as a slip stopper. The opening provided in the plate body has a size suitable for carrying in materials, and the size of the opening is adjusted using a divided lid member. Before the hoisting, the handrail pillar is erected at the end of the plate body and the handrail or the main rope is stretched so that the work on the scaffolding board can be performed safely immediately after the hoisting and fixing.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a large scaffold plate constituting the hanging scaffold of the present invention, and FIG. 2 is a II-II of FIG.
Sectional drawing which shows a cross section, FIG. 3 is a sectional view which shows the III-III cross section of FIG. The large scaffolding plate 1 is a plate body formed of a structural member having a large cross-sectional performance. Make a hole.

The size of the plate is, for example, 2.0 m × 8.0.
The standard size is about m, and other sizes are prepared as needed. In order to increase the cross-sectional performance of the plate body, the girder steel members 5 are juxtaposed in the longitudinal direction, and rectangular steel pipes of various sizes and various shaped steels are appropriately selected and used according to the load. Also, upper surface 1a
Is made into a striped steel plate 6 in consideration of slip prevention, and flat bars 7 are fixed to the lower surface of the girder steel material 5 at appropriate intervals. As described above, since the scaffold plate is formed of a steel plate, there is no fear of fire due to spark scattering even when performing welding work.

The suspending member locking tool 2 has a structure in which it is housed in the plate body when not in use and pulled out when hanging from the slit 2a formed in the upper surface 1a of the plate body.
It has a plate 2c that is pivotally supported by b, and is provided in two rows along the longitudinal direction of the plate at predetermined intervals (about 500 mm to 750 mm). A method of using the hanging material locking tool 2 will be described with reference to FIG. FIG. 4 is an enlarged cross-sectional view showing the IV-IV cross section of FIG. A pin 2b is inserted into one of the plates 2c so as to be rotatable, and a hanging material insertion hole 2d is formed in the other.

At the time of suspension, the plate 2c is turned by pushing the end of the plate on the side of the pin 2b in the direction of the arrow, so that the suspension material insertion hole 2d can be projected outside the plate body. The upper portion of the plate at the time of storage is flush with the upper surface of the plate body, the size of the slit 2a to be opened is slightly larger than the plate thickness, and a margin is provided to allow rotation in the longitudinal direction. The suspending members 2 are finely arranged at the above pitch so that they can be suspended from any position.

The handrail post mounting portion 3 is a pipe hole 3a drilled at both ends in the longitudinal direction of the plate body. The handrail post 8 is dropped in, and a locking pin 8a is mounted as shown in FIG. . The installation direction of the handrail 9 can be in either the short side or the long side direction of the large scaffold 1 and can be grounded during lifting. or,
It is also possible to assemble the morning glory using the handrail pillar 8.

The holes formed in the side plates of the plate are clip holes 4.
A notch 10 is formed in the upper surface 1a of the plate body at a position where the clip hole 4 is provided. The connecting member is a member that sandwiches two side plates that penetrate and abut on a hole formed in the side plate of the plate body, and this member uses a U clip 11,
The large scaffolds 1 are connected to each other by sandwiching the two side plates 1b that are in contact with one touch. Note that one or both of the clip holes 4 may be elongated holes. Such U clip 11
The connection of the panels by means of good workability can be ensured. Further, instead of the U-clip 11, a connection may be made using a fastening member such as a hexagon bolt.

The suspending material which locks the lower end portion of the suspending material locking tool is a member for fixing the upper end to the structure to support the large scaffolding plate. The structure of this hanging material will be described with reference to FIG. FIG.
[Fig. 3] is a front view of a hanging material. The hanging material 12 is a binding metal fitting 1 at the upper end.
An annular suspension 12b is rotatably attached to the lower end of the jack 2a, a jackle 200 is connected to the annular suspension 12b, and a bolt 201 of the jackle 200 is attached to the suspension material insertion hole 2d.
It can be attached by inserting into. Furthermore, the inner tube 1 of the rod-shaped member
2c and the outer tube 12d are inserted through the pin 12e so that the entire length can be adjusted stepwise. Further, a screw rod 12f connected to the annular suspension 12b is screwed to the inner pipe 12c to finely adjust the length.

The binding member 12a is fastened and fixed to a girder flange or the like of a structure (not shown), and an allowable pulling force per suspension member 12 is about 2,000 kgf. Hanging material 12
The attachment positions of the binding metal fitting 12a and the suspending member locking tool 2 are appropriately selected so that the vertical axis is as vertical as possible. The inclination of the suspending member 12 can be adjusted by rotating the annular suspending tool 12b. As described above, the hanging member 12 is a metal fitting having a high allowable strength and is devised so that the length can be adjusted with one touch.

When constructing the suspended scaffolding, the large scaffolding board carried into the site by a truck or the like is transferred to the boom vehicle and the handrail is grounded before lifting. Fig. 6 shows a large scaffolding board with handrails. A handrail pillar 8 and a handrail 9 are attached to the short side direction of the large scaffolding plate 1, and a master rope 13 is attached to the long side direction. As described above, since the handrail and the master rope are set at the time of lifting even with a single scaffold plate, safety during erection work, in particular, fall prevention can be achieved.

The large scaffold plate is hoisted to a predetermined position by the boom vehicle, the suspending material 12 for fixing to the structure is attached to the suspending material locking tool 2, and the adjacent large scaffolds 1 are connected with the U clip 11 which is a connecting tool. It is connected by using, and the length is finely adjusted by the screw rod 12f of the suspending member 12 to secure the levelness. As described above, the hanging scaffold using the large scaffold plate 1 has a high construction speed, and can secure the mounting of the scaffold and the safety of work on the scaffold.

Further, since the scaffold panel is made huge and the strength of the suspending material is improved, the construction time is saved and the work efficiency on the scaffold is also improved. Such a suspended scaffold can be used not only as a highway, but also as a landing cradle for architectural civil engineering.

The large-sized scaffolding plate of the suspension scaffolding described above has a structure in which steel members for girders are arranged in parallel in the longitudinal direction, but it is not limited to this as long as the cross-sectional performance of the plate body can be secured, and for example, FIG. Alternatively, the corrugated steel sheet shown in FIG. 8 may be used. In this large-sized scaffolding plate 51, a striped steel plate 56 is fixed to the upper surface of the recess of the corrugated steel plate 55 to form a flat upper surface 51a,
Light weight shaped steel is welded to the side plate 51b, and flat bars 57 are welded to the lower surface at appropriate intervals to prevent the plate body from twisting and increase the strength and rigidity. Note that the hanging member locking tool 52 and the handrail post mounting portion 53 provided on the upper surface 51a have the same configuration and operation as those described above, and therefore description thereof will be omitted.

Next, a large scaffolding plate having an opening and a lid member will be described with reference to FIGS. 9 to 16. The opening provided in the plate body has a size suitable for carrying in materials, and the size of the opening is adjusted using a divided lid member. Note that these lids are required to have sufficient strength to secure a passage for workers, but do not carry heavy objects.

The lid member 13 shown in FIGS. 9 and 10 has a structure in which a corrugated steel plate is used to provide a handle 13a that can be housed inside and is placed directly on the upper surface 61a of the large scaffold plate 61. The lid member 14 shown in FIGS. 11 and 12 is a plate member that is made of a material such as aluminum and has a reduced weight, and is placed on a support member such as a channel steel 71d attached to the opening 71c of the large scaffold plate 71. The lid member 15 shown in FIG. 13 and FIG.
With a configuration in which the pair of sheets are foldably connected by the hinges 15a, the space for temporarily placing the lid member 15 can be reduced when the opening is installed. Lid 1 shown in FIGS. 15 and 16
Reference numeral 6 denotes a structure which is slidable along a guide member such as lip channel steel 81d attached to the opening 81c of the large scaffolding plate 81, and which is inserted and withdrawn from the end.

[0029]

As described above, since the suspension scaffold of the present invention is a plate for rotatably supporting the suspending material locking member of the large scaffold plate and storing it inside the plate body when not in use, It is easy to pull out, and there is no risk that it will interfere with walking or small parts will fall. Further, since the handrail mounting portion is a hole formed at the end of the plate body, the degree of freedom in installing the handrail is increased. In addition, the connecting member facilitates the work of connecting and disconnecting the scaffold plates. In addition, since the suspension has a rod-shaped member that can expand and contract, the scaffolding plate can be accurately leveled and the strength can be secured.

Further, in the suspension scaffold according to the second or third aspect, since steel plates for girders or corrugated steel plates are used for the plate body, it is possible to provide high rigidity.

Further, since the suspended scaffold according to claim 4 comprises the opening and the divided lid member bridging over the opening, even if a large scaffold plate is used, a small opening can be installed and its size can be increased. It can also be adjusted freely.

The method for constructing a suspended scaffold according to claim 5 is:
Since the handrail pillars are erected on the large scaffolding plate and the handrails and the main rope are set and lifted, safety during erection work, especially fall prevention can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view of a large scaffold.

FIG. 2 is a cross-sectional view showing a II-II cross section of FIG.

FIG. 3 is a cross-sectional view showing a III-III cross section of FIG. 1.

FIG. 4 is an enlarged sectional view showing a section taken along line IV-IV of FIG. 2;

FIG. 5 is a front view of a suspension member.

FIG. 6 is an explanatory diagram of a method of constructing a large-sized scaffolding plate with handrails as a base.

FIG. 7 is a plan view of a large scaffolding board according to another embodiment.

8 is a cross-sectional view showing a VIII-VIII cross section of FIG. 7. FIG.

FIG. 9 is a perspective view of a large scaffolding plate including an opening and a lid member.

FIG. 10 is a cross-sectional view of a lid member.

FIG. 11 is a perspective view of another large scaffolding plate including an opening and a lid member.

FIG. 12 is a cross-sectional view showing a XII-XII cross section of FIG. 11;

FIG. 13 is a perspective view of another large scaffolding plate including an opening and a lid member.

FIG. 14 is a cross-sectional view showing a XIV-XIV cross section of FIG.

FIG. 15 is a perspective view of another large scaffolding plate including an opening and a lid member.

16 is a cross-sectional view showing the XVI-XVI cross section of FIG.

[Explanation of symbols]

 1 Large scaffolding plate 1a Upper surface 1b Side plate 2 Suspension material locking tool 2a Slit 2b Pin 2c Plate 2d Suspension material insertion hole 3 Handrail post attachment part 4 Clip hole 8 Handrail post 9 Handrail 11 U clip 12 Suspension material 12a Binding metal fitting 12b Ring suspension Tool 12c Inner tube 12d Outer tube 12e Pin

Front page continuation (71) Applicant 591211917 Kawata Construction Co., Ltd. 6-3-1, Takinogawa, Kita-ku, Tokyo (71) Applicant 595045842 Topy Construction Co., Ltd. 252 Yamashita-cho, Naka-ku, Yokohama-shi, Kanagawa (71) Applicant 596062381 Tokyo Road Engineering Co., Ltd. 3-15-8 Ginza, Chuo-ku, Tokyo (71) Applicant 596014357 Taiyo Road Co., Ltd. 1-10-1 Yurakucho, Chiyoda-ku, Tokyo (71) Applicant 596062392 Deck Tokyo Taito Corporation 7-2-8 Ueno, Ku (72) Inventor Shiro Kawasaki 2-31-17 Kawazoe, Takatsuki-shi, Osaka (72) Inventor Keiichi Abe 2-3-8-12, Irifune, Urayasu, Chiba Inventor Masayoshi Omura Saitama 4-2-12-501 Honmachi, Iwatsuki City, Japan (72) Inventor Tadao Iino 4-10-15 Maesawa, Higashi Kurume City, Tokyo (72) Inventor Hidemi Nagatomo 4-1-2-12, Shirayama, Aso-ku, Kawasaki City, Kanagawa Prefecture (72) Inventor Takashi Yoshida 3-6-31 Higashimachi, Koganei City, Tokyo (72) Inventor Kazuo Yoshikawa 2-11-8 Kawanakajima, Kawasaki-ku, Kawasaki-shi, Kanagawa

Claims (5)

[Claims] 1. A large scaffolding plate having a plate member made of a component having a large cross-sectional performance and having a hanging material locking device and a handrail post mounting portion on the upper surface, a connecting member provided at an end portion of the plate member, and an upper end structure. In a suspension scaffolding having a suspending material that is fastened to an object and has a lower end engaged with a suspending material locking tool to support a plate material, the suspending material locking tool has one end portion on a pin protruding inside the plate body. Is a plate that is rotatably supported and has a suspending member insertion hole formed in the other end so that it can be stored inside the plate when not in use. The connecting member is a member that sandwiches two side plates that penetrate and abut the hole formed in the side plate of the plate body, and the hanging member has a binding metal fitting at the upper end and a binding metal member at the lower end. A suspending scaffold, which is an expandable rod-like member for rotatably mounting a suspender engaged with a material insertion hole. 2. The suspension scaffolding according to claim 1, wherein the plate body is a plate body having steel members for girders arranged side by side in the longitudinal direction and a striped steel plate fixed to the upper surface thereof. 3. The plate body is a plate body having a corrugated cross-section steel plate that secures a striped steel plate to the recess to form a flat upper surface, and a plate material that secures to the periphery to form a side plate. The hanging scaffold according to claim 1, which is characterized in that. 4. The plate body includes an opening portion and a divided lid member that bridges the opening portion.
The hanging scaffold according to claim 3. 5. A large scaffolding plate having a plate body formed of a component having a large cross-sectional performance, a suspension material locking device on the upper surface, and a handrail column mounting portion for a hole drilled at an end of the plate body, and a handrail column. And a handrail and / or a main rope are attached to the suspended scaffold for lifting from the structure by lifting.