JP6984864B2 - Master rope support and its installation method - Google Patents

Description

The present invention relates to a main rope support and an installation method thereof, and more specifically, a main rope support to be installed on the uppermost work floor for stretching the main rope on the uppermost work floor of a temporary scaffold and the main rope support thereof. It is about the installation method.

Various scaffolds such as frame scaffolds, wedge-coupled scaffolds, and single-tube scaffolds are known as temporary scaffolds used for construction work of buildings or civil engineering structures. The frame scaffolding is constructed on the outside of the building planned or under construction by building the building frame and erection of the floored cloth frame as a work scaffolding board on each layer of the building frame, according to the progress of the construction work. By building the building frame in the upper layer one by one, it will be extended to the upper layer and dismantled at an appropriate time just before the completion of the construction work. In addition, the wedge-coupled scaffold has a wedge scaffolding column in which binding portions such as a flange portion (or flange portion) or a column pocket portion (box portion) are arranged at predetermined intervals, and has a cloth material, arm wood, and a floor. By sequentially connecting scaffolding components such as cloth frames, head timbers, root lumbers, braces, etc. to the binding parts of the columns by wedge joints, etc., it is constructed on the outside of the building to be constructed or under construction in the same way as the frame scaffolding. , It will be extended to the upper layer by sequentially building the building frame in the upper layer according to the progress of the construction work, and will be dismantled at an appropriate time just before the completion of the construction work. On the other hand, for single-pipe scaffolding, fixed base metal fittings are placed at predetermined intervals on the floor plate of the ground surface, and a steel pipe building site (single-pipe pipe or scaffolding steel pipe) is built, and the roots, braces, cloth, etc. It is assembled by binding a single pipe or a scaffolding steel pipe constituting a center rail, a handrail, a brace, etc. with a binding member (clamp metal fitting) and laying a scaffolding plate on an arm tree. Similar to frame scaffolding and wedge-coupled scaffolding, single-pipe scaffolding is also a temporary scaffolding in which single-pipes (steel pipes) are sequentially built in the upper layers according to the progress of construction work, and is appropriate immediately before the completion of construction work. It will be dismantled at the time.

In both types of scaffolding, it is necessary to provide a master rope or a leading handrail on the uppermost work floor as a safety measure to prevent a fall. Generally, the main rope is stretched on the uppermost work floor by mooring the main rope to a binding member such as a clamp metal fitting fixed to the building site, or by mooring the main rope to the main rope support (actual Kaihei). 6-56320, JP-A-6-257279, JP-A-5-321481, etc.). On the other hand, the preceding handrail is a handrail that is assembled on the floor on the uppermost work floor, and the handrail is assembled by the worker on the uppermost work floor after the main rope is stretched on the uppermost work floor. It is known that a worker on a work floor (existing work floor) below the work floor assembles a handrail on the uppermost floor. As the leading handrail of the latter method, for example, a leading handrail for a frame scaffolding of an elevating type or a refilling type (Japanese Patent Laid-Open No. 2003-41779), or a refilling type leading handrail composed of a handrail strut and a telescopic handrail (Japanese Patent Laid-Open No. 2003-41779). Japanese Unexamined Patent Publication No. 2001-288883) and the like are known. This type of leading handrail is also called a leading handrail or a handrail leading type scaffold.

In general, the main rope stanchions only have a configuration that can be attached to a framework scaffold and do not have a configuration that can be used in a single-tube scaffold. It is considered that this is due to the structure of the single pipe scaffolding in which the single pipes (steel pipes for scaffolding) such as arms, cloth, handrails, and braces are fastened to the single pipes of the building site by the binding member (clamp metal fittings). That is, in the case of a single pipe scaffold, a binding portion in which a plurality of intersecting steel pipes are fastened with a binding member is formed everywhere, so that the existing work floor (the work floor further below the uppermost work floor) is used for the uppermost layer work. When raising the main rope support to the floor level, the rise of the main rope support is often blocked or hindered by the binding part, and it is difficult to design a practically usable main rope support.

On the other hand, the applicant proposes a master rope strut that can be used in a single-tube scaffold in Japanese Patent Application No. 2005-160945 (Japanese Unexamined Patent Publication No. 2006-336267). The master rope strut described in Japanese Patent Application Laid-Open No. 2006-336267 (Patent Document 6) is provided with an upper holder and a lower holder for holding or releasing the building site in a floating and rotatable manner, and is relatively large in size. It is deformed to the outside, and the main rope support is raised while the building is held by the upper holder, and the support body is rotated around the building on the uppermost work floor, so the rise is prevented by the binding part. It can rise to the top level without being disturbed or hindered.

14 and 15 are partial perspective views of the uppermost layer portion of the single-tube scaffold showing the configuration and usage of the master rope support described in Patent Document 6.

Generally, in the uppermost layer of a single-tube scaffold, as shown in FIG. 14, a building site Ca projecting upward from the scaffold plate F by a predetermined distance (for example, about 1 to 1.5 m) and a slight amount from the scaffold plate 9. The building sites Cb projecting upward are alternately arranged in the cloth direction, and the upper ends of the building sites Ca: Cb are arranged in a staggered manner. The main rope hook G and the tensioner E with hooks are attached to the building site Cb or the like. Workers of the existing work floor (work floor below the uppermost work floor) attach the main rope support P to the building site Ca as shown in FIG. 14, and attach the main rope B to the upper end of the main rope support P. Lock. The main rope support P is deformed relatively greatly outward in order to avoid interference with the joint portion J in which the single pipes constituting the building site, cloth, arm wood, etc. are tied with the binding member. Further, the worker or the like raises the main rope support P as a whole by the guidance of the building site Ca and rotates it around the support, and tensions the main rope B by using the main rope hook G and the tension device E with hooks. As a result, as shown in FIG. 15, the master rope column P is erected on the uppermost work floor, and the master rope B is stretched between the master rope columns P.

Jitsukaihei 6-56320 Gazette Japanese Unexamined Patent Publication No. 6-257279 Japanese Unexamined Patent Publication No. 5-321481 Japanese Unexamined Patent Publication No. 2003-41779 Japanese Unexamined Patent Publication No. 2001-288883 Japanese Unexamined Patent Publication No. 2006-336267

However, the conventional master rope strut P described in Patent Document 6 guides the master rope strut P to the building site Ca projecting upward by about 1 m to 1.5 m from the floor surface of the uppermost work floor (scaffolding plate F). It is attached to the building site Cb, which has only a structure used as a means and a supporting means, and protrudes upward by a relatively small size (for example, 10 to 30 cm) from the floor surface of the uppermost work floor. Can't.

Further, the main rope support P only has a structure that can be freely rotated around the building site Ca by means of upper and lower holders and can be attached to the building site. Therefore, regarding the support structure of the main rope support P, the structural structure thereof. Measures to improve stability etc. are desired.

The present invention has been made in view of such a problem, and an object thereof is a main rope support for a single-tube scaffold that can be installed from an existing work floor to the uppermost work floor. It is an object of the present invention to provide a main rope strut that can be attached to a building site that protrudes only a relatively small amount upward from the floor surface of the uppermost work floor, and that can exhibit good structural stability.

In order to achieve the above object, the present invention relates to a main rope strut installed on the uppermost work floor in order to stretch the main rope on the uppermost work floor of the temporary scaffold.
A strut body with a main rope holding means that can lock, moor or insert the main rope,
A first engagement that is attached to the lower part of the strut body and functions as a guiding means for accepting the building site or the building material in an inserted state while the strut body is tilted and moving or displaceting the column body to a vertically upright position. Department and
A second engaging portion which is arranged at an intermediate height position of the column body and is placed or locked on the arm tree, rolling or horizontal material and supported by the arm tree, rolling or horizontal material.
The strut being arranged in an intermediate height position of the body, have a third engagement portion to be Tightened on the Kenchi or Kenchi material,
The second engaging portion is a pair of left and right arranged on each side of the column body in order to selectively lock to an arm tree, a rolling or a horizontal material located on an arbitrary side of the building site or the building material. providing Shintsuna struts, characterized in that have a hook portion or the locking portion.

The present invention is also a method for installing a master rope strut having the above configuration on the uppermost layer of a temporary scaffold.
The building site or building material is inserted into the first engaging portion in a state where the column body is tilted, and the column body is displaced or moved to a vertically upright position using the first engaging portion as a guiding means. Let me
The second engaging portion is placed or locked on the arm tree, rolling or horizontal material, and the load of the master rope support is at least partially supported by the arm tree, rolling or horizontal material.
The third engaging portion is tied to the building site or the building material,
Provided is a method for installing a master rope strut, which comprises preventing or restraining horizontal displacement, rotation and descent of the master rope strut by the first to third engaging portions.

According to the above configuration of the present invention, the first engaging portion forms a guiding means that engages with the building ground or the building ground material to displace or move the column main body between the tilted position and the vertically standing position. Further, a bearing means for transmitting the vertical load of the support column body to the arm tree, rolling or horizontal material at least partially is formed by the second engaging portion. Further, a binding means or a fixing means for binding the support column body to the building site or the building material is formed by the third engaging portion. The strut body can be relatively easily positioned in the vertical upright position by the guide function of the first engaging portion. The position of the strut body is stabilized by placing or locking the second engaging portion on the arm, rolling or cross member. Since the position of the strut body is stable, the strut body can be relatively easily tied to the building site or the building material by the third engaging portion, and the column body can be fixed in the vertically upright position. Since the support structure of the strut body is stabilized by the first to third engaging portions, the master rope strut can be attached to a building site or a building material that protrudes slightly upward from the uppermost work floor.

According to the present invention, it is a main rope support for a single-tube scaffold that can be installed on the uppermost layer from an existing work floor, and only protrudes upward by a relatively small dimension from the floor surface of the uppermost work floor. It is possible to provide a main rope strut that can be attached to a building site and that can exhibit good structural stability.

FIG. 1 is a partial perspective view and an elevation view showing the configuration of a general single-tube scaffold. FIG. 2 (A) is a cross-sectional view of the uppermost part of the single-tube scaffold showing the state before the main rope support is erected on the uppermost work floor of the single-tube scaffold, and FIG. 2 (B) is a cross-sectional view of the main rope support. It is sectional drawing of the uppermost part of a single pipe scaffold which shows the state after installation. FIG. 3 (A) is a front view of the uppermost part of the single-tube scaffold showing the state before the main rope support is erected on the uppermost work floor of the single-tube scaffold, and FIG. 3 (B) is the main rope support stand. It is a front view of the uppermost part of a single pipe scaffold which shows the state after installation. FIG. 4 is a perspective view, a side view, and a front view showing the overall configuration of the main rope support according to the first embodiment of the present invention. 5 is a front view, a side view, a plan view, and an exploded perspective view showing the structure of the first engaging portion shown in FIG. 4. FIG. FIG. 6 is a plan view, an exploded perspective view, a partially broken front view, and a perspective view showing the structures of the second and third engaging portions shown in FIG. 7 is a front view, a vertical sectional view, and a perspective view showing the structure of the main rope hook portion shown in FIG. 4. FIG. FIG. 8 is an elevation view, a cross-sectional view, and a partial perspective view showing a method of installing the main rope support, and FIGS. 8 (A) and 8 (B) show the parent viewed from the outdoor side toward the passage side. The installation process of the rope support is shown. FIG. 9 is an elevation view and a perspective view showing a method of installing the main rope support, and FIGS. 9 (A) and 9 (B) show the installation of the main rope support as viewed from the aisle side to the outdoor side. The process is shown. FIG. 10 is a partial perspective view of the frame scaffold showing the configuration of the main rope support for the frame scaffold. FIG. 11 is a perspective view showing the structure of the second engaging portion used in the main rope support shown in FIG. FIG. 12 (A) is a side view showing the configuration of the main rope support that can be attached to the bracket scaffold, and FIG. 12 (B) is a side view showing a state in which the main rope support is attached to the bracket scaffold. 12 (C) is a perspective view showing the structure of the second engaging portion used in the main rope support for the bracket scaffold. FIG. 13 is a side view showing a state in which the main rope support shown in FIG. 12 is attached to the frame scaffold. FIG. 14 is a partial perspective view of the uppermost layer portion of the single-tube scaffold showing the configuration and usage of the master rope support described in the above-mentioned Patent Document 6. FIG. 15 is a partial perspective view of the uppermost layer portion of the single-tube scaffold showing the configuration and usage of the master rope strut described in Patent Document 6, similar to FIG.

In a preferred embodiment of the present invention, the first engaging portion is a plurality of or a pair of left and right portions that define a building site insertion area through which a building site or a building material can be inserted in a tilted state and a vertically standing state of the column body. It has a hook-shaped member. The hook-shaped member forms an inclined groove extending at an inclination angle corresponding to the inclination angle of the column main body. The inclined groove receives the building site or the building material into the building site insertion area in a state where the main body of the column is tilted.

More preferably, the third engaging portion has a temporary construction clamp fitting that can be fastened to the building site or the building material.

In a further preferred embodiment of the present invention, the second engagement portion has a fixing portion for fixing the full click unit or locking unit to the post body, the third engagement portion is fixed It has a clamp fitting for temporary work attached to the part. Preferably, the fixing portion projects outward from the strut body so as to form a gap of at least 45 mm between the strut body and the building site or lumber.

If desired, as the hook-shaped parts constituting the second engaging portion, a plurality of hook-shaped parts adapted to different types of scaffolding are prepared, and the hook-shaped parts corresponding to the type of scaffolding on which the main rope support should be installed are prepared. Is selectively attached to the main body of the support. For example, at least two types of hook-shaped parts that can be attached to a single-tube scaffold, a frame scaffold or a bracket scaffold arm, a rolling or horizontal lumber (for example, a first hook-shaped part for a single-tube scaffold and a frame scaffold / bracket scaffold). The second hook-shaped part) is prepared, and one of these hook-shaped parts is selectively attached to the support column body. According to such a configuration, the main rope support can be selectively installed on different types of scaffolding such as a single pipe scaffold, a framework scaffold or a bracket scaffold.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a partial perspective view and an elevation view of a single-tube scaffold showing the configuration of a general single-tube scaffold.

The single-tube scaffolding 1 is a multi-layered structure consisting of a single-tube pipe 2, a root sill 3, a cloth 4, an arm tree (rolling or rolling) 5, a handrail 6, a center rail 7, a brace (brace) 8, and a scaffolding board 9. It has a structure assembled in (7 layers in FIG. 1) and is arranged along the outer wall surface of the building A under construction. Curing nets 15 and 16 (FIG. 1 (B)) for preventing tools from falling are provided on the outer surface of the single-tube scaffold 1, and the wall connecting member 17 for preventing the single-tube scaffold 1 from tilting is provided on the building site 2 and It is arranged so as to interconnect the buildings A.

At the initial stage of assembling the single-tube scaffold 1, the floor plate 11 is arranged on the ground corresponding to the arrangement of the single-tube scaffold 1, and the fixed base metal fitting 12 is fixed to the floor plate 11 by a locking tool such as a nail. .. The root entanglement 3 is tightened or tightened (hereinafter referred to as "tightening") to the lowermost part of the building site 2 by a tightening member, a tightening metal fitting or a clamp metal fitting 13 (hereinafter referred to as "tightening member 13"), and is near the ground level. The building lots 2 are interconnected with. The building sites 2 are arranged at intervals of about 0.6 to 1.5 m in the beam-to-beam direction and about 1.8 m in the girder direction. The cloth 4 and the arm tree 5 are fastened to the building site 2 by the binding member 13 and erected in the beam-to-beam direction or the girder direction.

As the building A sequentially extends to the upper layer as the construction work progresses, the building site 2 is sequentially added to the upper layer by general-purpose joint fittings. The cloth 4, the arm tree 5, and the brace 8 of each layer are sequentially fastened to the building site 2 by the binding member 13. The scaffolding board 9 of each layer is laid on the arm tree 5, and a work floor or a work passage is formed in each layer. At the level above the second layer, the handrail 6 and the center rail 7 are bound to the building site 2 by the binding member. The handrail 6 is arranged at a height of 90 cm or more from the scaffolding plate 9 in each layer. In FIG. 1, the cloth 4 is arranged on the outside (outdoor side) of the building site 2, and the handrail 6 and the center rail 7 are arranged on the inside (passage side) of the building site 2. It may be arranged inside the building site 2, or the handrail 6 and the center rail 7 may be arranged outside the building site 2.

In the single-tube scaffolding 1 shown in FIG. 1, the scaffolding plate 9 of the uppermost layer (seventh layer) is laid. On the uppermost work floor, the building site 2a projecting upward from the scaffolding board 9 by a predetermined distance (for example, about 1 to 1.5 m) and slightly above the scaffolding board 9 (for example, about 10 to 30 cm). The building sites 2b protruding from the ground are arranged alternately in the direction of the cloth 4, and the two types of building sites 2a and 2b are arranged in a staggered manner at the uppermost part of the building site 2. As described above, such a staggered arrangement at the top of the building site is a building site arrangement generally adopted in the conventional single-tube scaffolding.

2 (A) and 3 (A) show the state of the general-purpose single-tube scaffold 1 as shown in FIG. 1 before the main rope support 20 is erected on the uppermost work floor. It is a sectional view and a front view of the upper part. 2 (B) and 3 (B) are a cross-sectional view and a front view of the uppermost portion of the single-tube scaffold showing a state in which the main rope support 20 is erected in a vertically upright position on the uppermost work floor. In the single-tube scaffolding shown in FIGS. 2 and 3, the cloth 4 is arranged inside the building 2 (passage side). Further, the arm tree 5 is arranged on the left side of the building sites 2a and 2b when viewed from the outdoor side.

2 and 3 are operator or the like working on the scaffolding board 9 hierarchy S _n is shown. The scaffolding plate 9 of the layer S _n is located _{at the work floor level L n.} As shown by the dotted line, the scaffolding board 9 of the _{layer S n + 1} is laid on the work floor level L _{n + 1 of the uppermost layer.} Operator or the like of the hierarchical S _n, before laying the scaffolding plate 9 hierarchy S _{n + 1} (working floor level L _{n + 1),} attach the lifeline struts 20 hierarchical S _{n + 1} at the junction J. The joint portion J is a single pipe connecting region in which each single pipe constituting the building ground 2a, the cloth 4, and the arm tree 5 is fastened by the binding member 13.

The main rope support 20 has a first engaging portion 30 arranged at the lower end portion, and a second engaging portion 40 and a third engaging portion 50 arranged at intermediate height positions. As shown by the broken line in FIG. 2A, the first engaging portion 30 engages with the building ground 2a in a state where the main rope support 20 is inclined. The first engaging portion 30 has a pair of hook-shaped locking means for locking to the building ground 2a under the scaffolding plate 9 and the arm tree 5 of _{the layer S n + 1, and has a cloth direction (girder direction) and an arm tree.} The displacement or movement of the main rope support 20 in the direction (inter-beam direction) is restrained to some extent. However, as shown by the arrow in FIG. 2A, the worker or the like rotates the main rope support 20 around the building site 2a and rotates or rotates the main rope support 20 in the vertical standing posture shown in FIG. 2B. Can be pivoted. The second engaging portion 40 has _{a hook-shaped locking means that can be locked to the arm tree 5 of the layer S n + 1} , and mainly serves as a means for restraining or preventing the descent of the main rope support 20 and the tilting in the cloth direction. Function. The third engaging portion 50 has a binding member (clamp fitting) that can be fastened to the upward projecting portion of the building 2a on the upper side of the arm tree 5 of _{the layer S n + 1, and lowers and horizontally displaces the main rope support 20.} Acts as a means of restraining or blocking.

The master rope support 20 further has a master rope hook portion 60 at the upper end portion as a master rope holding means for intermediately supporting the master rope B. The main rope B is inserted, locked or moored in the main rope hook portion 60, and the main rope B extends horizontally in the cloth direction. The master rope B is stretched between the master rope columns 20 at the same height as the handrail 6 (shown by the dotted line in FIG. 2) _{of the layer S n + 1.}

FIG. 4 is a perspective view, a side view, and a front view showing the structure of the master rope support column 20, and FIG. 5 is a front view, a side view, a plan view, and an exploded perspective view showing the structure of the first engaging portion 30. Yes, FIG. 6 is a plan view, an exploded perspective view, a partially broken front view, and a perspective view showing the structures of the second and third engaging portions 40, 50. Further, FIG. 7 is a front view, a vertical sectional view, and a perspective view showing the structure of the main rope hook portion 60. In addition, in FIG. 4 and FIG. 7, the main rope B is shown by a two-dot chain line.

As shown in FIG. 4, the main rope support 20 has a structure in which the first to third engaging portions 30, 40, 50 and the main rope hook portion 60 are arranged with respect to the square metal tube 21 having a square cross section. The metal tube 21 constitutes the main body of the column. The total length of the main rope support 20 is set to a dimension of about 1500 to 1600 mm. The metal pipe 21 is made of, for example, an aluminum alloy or steel pipe material having a cross-sectional dimension of 50 mm × 50 mm (W0 × D0) and a total length of about 1400 to 1500 mm. The first to third engaging portions 30, 40, 50 and the main rope hook portion 60 are made of a metal member, for example, a molded part made of an aluminum alloy or steel, or an assembly thereof.

As shown in FIG. 5, the first engaging portion 30 is a plan-view U-shaped, box-shaped or U-shaped fixing portion 31 fixed to the lower end portion of the metal pipe 21 by the bolt / nut assembly 32, and the fixing portion. It has a pair of left and right hook-shaped members 33, 34 protruding outward from 31. The hook-shaped members 33 and 34 are arranged at positions displaced from each other in the vertical direction, and form an inclined groove 35. The central axis C2 of the inclined groove 35 is inclined in the direction of the angle θ with respect to the central axis C1 in the vertical direction of the fixed portion 31, and the angle θ is set to, for example, about 30 degrees. The width W1 of the inclined groove 35 is set to a dimension slightly larger (for example, 50 to 55 mm) than the diameter (about 48 mm) of the single pipe constituting the building site 2. The front view width dimension W2: W3 of each hook-shaped member 33, 34 is set to a dimension slightly larger than the width W4 × 1/2 of the fixing portion 31. As shown in FIG. 5C, a building site insertion space 36 through which the building site 2 (indicated by a broken line) can be inserted in the vertical direction is defined by the hook-shaped members 33 and 34. The width dimension W4 and the depth dimension D1 of the building site insertion space 36 are set to dimensions slightly larger (for example, 50 to 55 mm) than the diameter (about 48 mm) of the single pipes constituting the building site 2.

As shown in FIG. 6, the second engaging portion 40 is made of an integral metal member and has a U-shaped, box-shaped or U-shaped fixing portion 41 and a pair of left and right hook portions 42. The hook portion 42 constitutes a hook-shaped locking means for locking to the arm tree 5. The fixing portion 41 is fixed to the metal pipe 21 by the bolt / nut assembly 45 in which only the shaft core is shown by the alternate long and short dash line. Each hook portion 42 has curved portions 43, 44 curved with predetermined curvature radii R1 and R2. The radii of curvature R1 and R2 are set to, for example, 25 mm. In use, the curved portion 43 located inside surrounds the outer peripheral surface of the arm tree 5 shown by the alternate long and short dash line in FIG. 6 (C), and the arm tree 5 can support the curved portion 43 or its vicinity. The curved portion 44 located on the outer side also surrounds the outer peripheral surface of the arm tree 5, and the arm tree 5 can support the curved portion 44 or its vicinity. The vertical load of the main rope strut 20 acting on the hook portion 42 is at least partially supported by the arm tree 5. Since the curved portions 43 and 44 extend below the top of the arm tree 5 on both sides of the arm tree 5, the arm tree 5 restrains or prevents the horizontal displacement of the hook portion 42 in the cloth direction.

FIG. 6A shows a binding member 51 constituting the third engaging portion 50. The binding member 51 is fixed by a bolt / nut assembly 55 in which only the shaft core is shown by a chain double-dashed line, and a holder 52 (FIGS. 6 (D) and 4 (A)) that restrains the rotation of the binding member 51. Restrained by 41. The binding member 51 is a general-purpose clamp metal fitting for temporary construction, and is fastened to the building site 2. The horizontal distance S1 between the central axis 2c of the building site 2 and the hook portion 42, the horizontal distance S2 between the central axis 2c and the metal pipe 21, or the structural surface of the hook portion 42 and the outer end surface 41a of the fixed portion 41. The horizontal distance S3 between the two is set in consideration of the workability of assembling the single pipe, the clamp fitting, and the like in the portion of the _{layer S n + 1.} For example, the distance S3 is set to about 35 to 45 mm and the distance S2 is set to about 75 to 80 mm.

As shown in FIG. 7, the master rope hook portion 60 includes a pair of left and right master rope mooring members 61 and 62, and a roller 63 that is transferred or slidably contacted with the master rope B indicated by the alternate long and short dash line. The main rope mooring members 61 and 62 are fixed to the upper end portion of the metal pipe 21 as shown in FIG. 4 by the bolt / nut assembly 65 shown in FIG. As shown in FIG. 7, the main rope mooring members 61 and 62 support the roller 63. The master rope mooring members 61, 62 and the roller 63 define a master rope insertion region 64 through which the master rope B can be inserted.

8 and 9 show how to install the main rope support column 20. 8 (A) and 8 (B) are elevation views of the main rope support 2 in the direction of arrow α (direction from the outdoor side toward the passage side) of FIG. 2 (B), and FIG. 9 (A). ) And FIG. 9 (B) are elevation views of the main rope support 2 in the direction of arrow β (direction from the passage side to the outdoor side) of FIG. 2 (B). Further, FIG. 8C is a partial cross-sectional view of the single-tube scaffold 1 showing the mounting mode of the main rope support 20, and FIG. 8D is a parent showing the contact state between the hook portion 42 and the arm tree 5. It is a partial perspective view of the rope column 20, and FIG. 9C is a perspective view showing a state in which the master rope column 20 is erected on the single pipe scaffold 1. In FIGS. 8 and 9, the cloth 4 is shown by a broken line for ease of understanding. Further, the arm tree 5 is arranged on the right side of the building sites 2a and 2b when viewed from the outdoor side (FIGS. 8A and 8B).

A method of installing the master rope support 20 will be described with reference to FIGS. 8 and 9.

First, as shown in FIGS. 8 (A) and 9 (A), the operator or the like tilts the main rope support column 20 with an inclination angle θ with respect to the vertical direction, and in this state, it is shown in FIG. 8 (C). As described above, the main rope support 20 is brought close to the building 2 from the outdoor side, and the first engaging portion 30 is engaged with the building 2. The building site 2 is accommodated in the building site insertion space 36 (FIG. 5) from the inclined groove 35 (FIG. 5) of the first engaging portion 30, and has an inclination angle as shown in FIGS. 8 (A) and 9 (A). Engage with the building 2 in a state of being inclined at θ. In this state, the binding member 51 of the third engaging portion 50 is in an released state. Preferably, as shown by the alternate long and short dash line in FIGS. 8A and 9A, the master rope B is formed in the master rope insertion region 64 of the master rope hook portion 60 before the installation process of the master rope support 20 is started. It is inserted in advance.

Next, the operator or the like rotates the master rope column 20 as shown by the arrows in FIGS. 8 (A) and 9 (A). The operation or behavior of the main rope support 20 is mainly rotation or pivoting with the portion of the first engaging portion 30 as a fulcrum or a center of rotation. When the main rope support 20 rotates to a substantially vertical upright position, the hook portion 42 on one side of the second engaging portion 40 is aligned with the arm tree 5, and the hook portion 42 can be placed on the arm tree 5. When an operator or the like places the hook portion 42 on the arm tree 5, the hook portion 42 is supported by the arm tree 5, and the vertical load of the main rope support 20 is supported by the arm tree 5.

This state is shown in FIGS. 8 (B) and 9 (B). In this state, the binding member 51 is aligned with the building site 2 at a predetermined height position, and the operator or the like can bind the binding member 51 to the building site 2. The main rope support 20 is firmly fixed to the building 2 in the vertically upright position by binding the binding member 51 to the building 2. In order to stretch the master rope B between the master rope columns 20, one end of the master rope B may be fixed and the other end may be towed as in the conventional case. Further, the scaffolding board 9 (FIG. 2B) on the uppermost layer is laid on the arm tree 5 after the main rope support 20 is installed.

The present inventors have already confirmed that a predetermined performance can be ensured by carrying out a "fall arrest performance test" specified under the Industrial Safety and Health Act for the main rope support 20, and therefore, the parent. The various performances of the rope support 20 have already been demonstrated. Further, although the master rope strut 20 was developed for a single-tube scaffold, the configuration of the present invention can also be applied as a configuration of a master rope strut for a framework scaffold. Hereinafter, as an application example of the present invention, an example of a master rope support for a framework scaffold according to the present invention will be described.

FIG. 10 is a partial perspective view of the framework scaffolding showing a configuration in which the main rope support 20'for the framework scaffolding is attached to the upper end corner of the torii type building frame 70 constituting the framework scaffolding 1'. FIG. 11 is a perspective view showing the structure of the second engaging portion 80 used in the main rope support column 20'shown in FIG.

FIG. 10 partially shows the building base material 71, the horizontal base material 72, and the stiffening material 73 of the torii type building frame 70 constituting the framework scaffolding 1'. The connecting portion 74 of the building lumber 71 extends above the horizontal lumber 72. The building material 71 corresponds to the above-mentioned building area 2, and the horizontal material 72 corresponds to the above-mentioned arm tree 5. The master rope strut 20'for the framework scaffold has a structure in which the second engaging portion 40 (FIG. 6) of the master rope strut 20 for the single pipe scaffold is replaced with the second engaging portion 80 (FIG. 11). The other components or components of the main rope support 20'are substantially the same as or equivalent to the components or components of the main line support 1.

As shown in FIG. 11, the second engaging portion 80 is made of an integral metal member (hook-shaped component) having a U-shaped, box-shaped or U-shaped fixing portion 81 and a hook portion 82 for frame scaffolding. Become. The hook portion 82 constitutes a hook-shaped locking means for locking to the horizontal member 72. The fixing portion 81 is fixed to the metal pipe 21 of the main rope support 20'by the bolt / nut assembly 85 (the axis is indicated by the alternate long and short dash line). The hook portion 82 has a semicircular curved portion 83 curved with a predetermined radius of curvature R3. The radius of curvature R3 is set to a dimension corresponding to the radius of the horizontal material 72, and the curved portion 83 is supported by the horizontal material 72 as shown in FIG.

Similar to the above-described embodiment, the binding member 51 constituting the third engaging portion 50 is fixed to the fixing portion 81 by the bolt / nut assembly (not shown) and the holder 52. The binding member 51 is a general-purpose clamp metal fitting for temporary construction, and is fastened to the building material 71.

The main rope support 20'is assembled to the building frame 70 by a method or work procedure substantially the same as or similar to that of the above-described embodiment. That is, when the main rope support 20'is used, the worker or the like installs the first engaging portion 30 (FIGS. 4 and 5) from the outdoor side with the metal pipe 21 tilted at an angle of inclination θ. Engage with 71, move, rotate or pivot the first engaging portion 30 to a vertically upright position as a guide means, or a fulcrum or a rotation center, and hit the curved portion 83 of the hook portion 82 with the horizontal material 72. The hook portion 82 is brought into contact with the horizontal material 72, and the binding member 51 is fastened to the building material 71. The main rope support column 20'is firmly fixed to the building material 71 by binding the binding member 51 to the building material 71.

FIG. 12A is a side view showing the configuration of the main rope support 20 "that can be attached to the bracket scaffolding 1", and FIG. 12B is a state in which the main rope support 20 "is attached to the bracket scaffolding 1". 12 (C) is a perspective view showing the structure of the second engaging portion 80'used in the main rope support column 20 ".

The bracket scaffolding 1 "has a telescopic bracket 90 attached to a building site 2d made of a single pipe, and has a structure in which a scaffolding plate 9 (indicated by a broken line) is laid on the arm bar 92 of the telescopic bracket 90. Is shown in FIG. 12 in a shortened state in which the telescopic portion 96 is pulled into the pipe of the arm tree main body. It has a fastening member 94 attached and a support portion 95 attached to the lower part of the mooring member 91. The telescopic bracket 90 is a stiffening slant that interconnects the lower end portion of the mooring member 91 and the tip end portion of the arm tree 92. The binding member 94, which is reinforced by the material 93, is a temporary construction clamp fitting that is fastened to the building 2d, and the support portion 95 is a semi-circular member that abuts on the outer peripheral surface of the building 2d. The 90 is supported by the building site 2d by binding the binding member 94 to the building site 2d and supporting the support portion 95 at the building site 2d.

The main rope support 20 "has the same basic structure as the main rope support 20'(FIGS. 10 and 11) for the framework scaffolding, but the height of the second engagement portion 80 is increased as shown in FIG. 12 (C). The second engaging portion 80'has a connecting expansion portion 87 that expands the vertical dimension between the hook portion 82 and the fixing portion 81 in that it is provided with a'main rope strut 20'. As shown in B), when the curved portion 83 of the hook portion 82 is locked to the arm tree 92 of the telescopic bracket 90, the binding member 51 of the third engaging portion 50 is arranged under the support portion 95, so that the binding member 51 is fastened. The member 51 can be fastened to the building 2d. The other components or components of the main rope support 20 "are substantially the same as or equivalent to the components or components of the main line support 20'and are the parent. The rope support 20 "is assembled to the telescopic bracket 90 and the building 2d by substantially the same method or work procedure as the main rope support 20'.

FIG. 13 is a side view showing a state in which the main rope support column 20 ”shown in FIG. 12 is attached to the framework scaffolding 1'(FIG. 10).

The master rope support 20 "shown in FIG. 12 includes a connecting expansion portion 87 that expands the vertical dimension between the hook portion 82 and the fixing portion 81 in order to adapt to the configuration of the bracket scaffolding 1". As shown in FIG. 13, the main rope support column 20 "having such a configuration is also applicable to the above-mentioned framework scaffolding 1'and can be attached to the framework scaffolding 1'.

Therefore, the second engaging portion 40 (FIG. 6) and the second engaging portion 80'(FIG. 12) are designed as attachments that can be selectively attached to the metal pipe 21 of the master rope support 20 (20', 20'). Then, by exchanging the second engaging portion 40 (FIG. 6) and the second engaging portion 80', the main rope support 20 (20', 20') is replaced with a single pipe scaffold 1, a framework scaffold 1'and a bracket scaffold. It can be adapted to any of 1 ”. By selectively attaching the main rope support 20 (20', 20 ") to the metal pipe 21 of 20 (20', 20"), the main rope support 20 (20', 20 ") can be attached to any of the single pipe scaffold 1, the frame scaffold 1'and the bracket scaffold 1". Can be used.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various modifications or changes can be made within the scope of the present invention described in the claims. It is possible.

For example, the master rope scaffolding of the above embodiment has a configuration of being attached to a single pipe scaffolding, a framework scaffolding, or a bracket scaffolding, but the master rope scaffolding according to the present invention may be otherwise modified by an appropriate design change or the like. It can also be used in temporary scaffolding in the form of.

Further, the main rope support according to the first embodiment has a structure suitable for a single-tube scaffold having a structure in which a cloth is arranged inside (passage side) of the building site, but the main rope support according to the present invention has a structure suitable for a single pipe scaffold. The design can be changed so that it can be used even in a single-tube scaffold having a structure in which the cloth is arranged on the outside (outdoor side) of the building site by appropriately changing the dimensions.

The present invention is applied to a main rope support for laying a main rope on a single pipe scaffold for construction, assembly, maintenance and management of construction, civil engineering, large equipment, large machine tools and the like. According to the main rope support of the present invention, a single pipe that can be attached to a building site that projects only a relatively small amount upward from the floor surface of the uppermost work floor and has good structural stability. Its practical effect is remarkable, as it can provide a main rope strut for scaffolding.

1, 1', 1 "temporary scaffolding (single pipe scaffolding, framework scaffolding, bracket scaffolding)
2 (2a, 2b, 2d) Building ground 4 Cloth 5, 92 Arms 9 Scaffolding board (work floor)
13 Tightening member (clamp fitting)
20, 20', 20 "Main rope support 21 Metal pipe (main body of support)
30 1st engaging part 31 Fixed part 33, 34 Hook-shaped member 35 Inclined groove 36 Building ground insertion space 40, 80, 80'2nd engaging part 41, 81 Fixed part 42, 82 Hook part 50 3rd engaging part 51 Tightening member (clamp fitting)
52 Holder 60 Main rope hook part 61, 62 Main rope mooring member 63 Roller 70 Torii type building frame 71 Building ground material 72 Horizontal ground material 87 Connecting expansion part 90 Telescopic bracket B Main rope θ Tilt angle

Claims (6)

In the main rope support installed on the uppermost work floor to stretch the main rope on the uppermost work floor of the temporary scaffolding
A strut body with a main rope holding means that can lock, moor or insert the main rope,
A first engagement that is attached to the lower part of the strut body and functions as a guiding means for accepting the building site or the building material in an inserted state while the strut body is tilted and moving or displaceting the column body to a vertically upright position. Department and
A second engaging portion which is arranged at an intermediate height position of the column body and is placed or locked on the arm tree, rolling or horizontal material and supported by the arm tree, rolling or horizontal material.
The strut being arranged in an intermediate height position of the body, have a third engagement portion to be Tightened on the Kenchi or Kenchi material,
The second engaging portion is a pair of left and right arranged on each side of the column body in order to selectively lock to an arm tree, a rolling or a horizontal material located on an arbitrary side of the building site or the building material. A master rope strut characterized by having a hook portion or a locking portion. The first engaging portion has a plurality of or a pair of left and right hook-shaped members that define a building site insertion area through which the building site or building material can be inserted in a tilted state and a vertically standing state of the support column body. The hook-shaped member forms an inclined groove extending at an inclination angle corresponding to the inclination angle of the support body so that the building or the building material can be received in the building insertion area in a state where the support body is tilted. The main rope support according to claim 1, wherein the main rope support is provided. The master rope support according to claim 1 or 2 , wherein the third engaging portion has a clamp metal fitting for temporary construction that can be fastened to a building site or a building material. The second engaging portion, the hook portion or the locking portion has a fixing portion for fixing to the strut body, the third engagement portion, temporary construction for clamping bracket attached to the fixed part The main rope support according to claim 1 or 2, wherein the main rope strut is characterized by having. The master rope strut according to claim 4, wherein the fixing portion projects outward from the strut body so that the strut body and the building site or the building material are separated from each other by 45 mm or more in the horizontal direction. .. A method for installing a master rope strut according to any one of claims 1 to 5 , wherein the master rope strut is installed on the uppermost layer of the temporary scaffold.
The building site or building material is inserted into the first engaging portion in a state where the column body is tilted, and the column body is displaced or moved to a vertically upright position using the first engaging portion as a guiding means. Let me
The second engaging portion is placed or locked on the arm tree, rolling or horizontal material, and the load of the master rope support is at least partially supported by the arm tree, rolling or horizontal material.
The third engaging portion is tied to the building site or the building material,
A method for installing a master rope strut, characterized in that the first, second and third engaging portions prevent or restrain the horizontal displacement, rotation and descent of the master rope strut.

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