JP5201633B2 - Two-stage handrail leading structure in construction scaffolding - Google Patents

Description

  The present invention relates to a two-step handrail leading structure in a construction scaffold that can improve safety with respect to scaffold assembly in a high-rise house or a super-high-rise house.

  The Ministry of Health, Labor and Welfare has issued guidelines on the “handrail advanced method” to prevent workers from falling off the scaffolding when building constructions with a height of 10 meters or more, and to create a comfortable work environment. ing. The “handrail advance construction method” is defined as a construction method in which the assembly and disassembly work of the scaffold can always be performed in a state where the two-stage handrail is preceded. In other words, when the scaffold is assembled, an appropriate handrail must be installed in advance at a location that is an end of the work floor before the worker installs the work floor of the upper scaffold.

  On the other hand, when performing exterior wall construction such as cleaning or refurbishment of the veranda side walls in high-rise or super-high-rise housing over 20 floors above the ground, the building wind generated by the high rises soars or blows through the building. It is susceptible to winds that are difficult to imagine on the ground. For this reason, it has been difficult to carry out the outer wall construction of the veranda, which has been conventionally performed, for example, the work performed by hanging the gondola from the roof because of the great danger. In recent years, there has been an accident where a gondola falls during the construction of the outer wall of the veranda, while super high-rise houses are lined up. In addition, in the case of a picket scaffold that is built up from the ground, in the case of high-rise housing, the construction of the scaffold becomes a major work, which requires a long construction period or enormous construction costs, and in reality it is impossible to construct a scaffold. Has occurred.

  For this reason, conventionally, as known in Patent Document 1, a scaffold that can be assembled with a veranda has been provided. According to this, the scaffold was configured as a work frame body by providing a support body that supports the floor surface and ceiling wall of the veranda so as to stretch, and projecting an overhanging frame body from the scaffold body to the outside of the veranda. . As a result, the scaffold body can be simplified, the construction period can be shortened, and the construction cost can be reduced.

Japanese Patent Laid-Open No. 11-2223012

  The scaffold of Patent Document 1 is composed of a lower frame, an upper frame, and an overhang frame (work deck), and the scaffold is assembled in a veranda where the outer wall work is performed. In this scaffold, since there is no lower part of the work deck and it is always the top floor, the work of attaching the handrail cannot be performed from below the work deck. For example, when assembling the work deck, in order to insert the handrail of the work deck into the overhanging frame, it was not possible in the veranda, and the worker had to assemble after climbing up to the work deck. For this reason, it was not possible to assemble the “advanced two-stage handrail” indicated in the guidelines from the Ministry of Health, Labor and Welfare, and the “handrail advance method” indicated in the guidelines could not be followed. .

This invention solves the above-mentioned subject, and it aims at providing the two-step handrail precedence structure in the scaffold for construction comprised so that "the handrail precedence construction method" can be observed. Therefore, the two-stage handrail leading structure in the construction scaffold according to the present invention is configured as follows. That is,
According to the first aspect of the present invention, a veranda is constituted by a veranda floor surface disposed on the lower surface, a veranda ceiling wall disposed on the upper surface, and a veranda side wall disposed on the side surface. A framework mechanism that is configured to be dismantled and supported so as to stretch the veranda floor and the veranda ceiling wall, and is disposed from the framework mechanism toward the outside of the veranda side wall so that an operator works. A two-step handrail leading structure in a construction scaffold configured to include a work deck including a scaffolding base, and a first pressing body that presses the veranda ceiling wall is disposed at an upper end portion of the framework mechanism A pair of the first pressing bodies are attached to a pressing portion base having a pressing jack along the length direction of the veranda and from the inner side of the veranda to the outer side of the veranda. It is formed in an elongated shape along the direction, wherein the working deck, the handrail having an intermediate transverse frame portion of the at least two stages with surround the said scaffold platform, and skirting which surround the said scaffold platform is distribution The scaffolding platform is spanned on a plurality of scaffolding platform stays extending from the framework mechanism, and the handrail can be tilted to a handrail support portion standing around the edge of the scaffolding platform. is supported, are arranged and lying posture lie down on the scaffold stand in proximity to the scaffold platform, the is movable in the two-position the rising posture which rises at a distance from the scaffold platform Rutotomoni, outside the veranda chamber The front handrail has an upper stage and a lower stage, the upper stage is configured to be foldable with respect to the lower stage, and the upper end of the front handrail is operated in the veranda. Pulled by the first traction means possible When the handrail is in the prone position, the upper portion, the relative lower unit, superimposed folded, when a worker working in the working deck, before the worker climb the working deck In addition, the handrail is held in the standing posture.

According to a second aspect of the invention, there is according to the invention of claim 1, wherein the handrail, after being moved from the pre-Symbol lying posture to the rising posture, configured to secure magnetic force to the handrail support part The rising position of the handrail is maintained by fixing with a lock pin.

A third aspect of the present invention relates to the second aspect of the present invention, wherein the scaffolding base is provided with an openable / closable hatch, and the hatch is connected to an elevating / lowering trap provided on the veranda. In addition, the opening-side tip of the hatch is connected to the front handrail by a second traction means operable in the veranda.

  According to the configuration of the first aspect of the present invention, the work deck on which the worker works is provided with the two-stage handrail and the baseboard, and the handrail is configured to be tiltable and assembled in the veranda. After pushing out to the outside of the veranda and fixing it, the handrail is raised by operating in the veranda. As a result, the worker can keep the handrail in a standing posture before climbing to the work deck, and can comply with the “Guidelines on the Handrail Precedence Method” presented by the Ministry of Health, Labor and Welfare. Construction can be performed safely at low cost.

In addition, the operator pulls the front handrail in the prone posture by the first pulling means by the first pulling means connected to the front end portion of the front handrail before climbing the work deck. Can do. Therefore, when the worker climbs up to the work deck, the handrail is held in the normal position in advance, and the “guideline regarding the handrail advanced method” can be observed.

According to the configuration of the second aspect of the present invention, after the handrail moves from the prone posture to the rising posture, it is fixed with the lock pin fixed by magnetic force, so that small parts such as nuts and washers for fastening the screw are not used. Therefore, the work contents are simplified and there is no fear of dropping small parts, and the handrail can be securely and securely held.

According to the configuration of the third aspect , the worker can go up to the work deck with the trap installed on the veranda and, when climbing up the work deck, raise the front handrail and at the same time connect to the hatch. Two towing means are towed in the veranda to open the hatch. Therefore, since the hatch opening / closing operation is not performed in the vicinity of the work deck, it is possible to safely move up and down the work deck.

It is a whole perspective view which shows the scaffold of embodiment in this invention. It is the same side view. It is a top view which shows the work deck in FIG. It is a rear view which shows the front handrail of the work deck in FIG. It is the same side view. It is a perspective view which shows the state which the handrail body in FIG. 1 folded. It is sectional drawing which shows a lock pin. It is a side view which shows the side railing in FIG. It is a front view which shows the state in which the side railing in FIG. 8 can tilt. It is a side view which shows the prone state of a front handrail. It is a side view which shows the rising progress state of a front handrail. It is a side view which shows the stand-up state of the front handrail by which the upper stage part was folded.

  Next, an embodiment of a two-stage handrail leading structure in the construction scaffold of the present invention will be described based on the drawings. The two-stage handrail leading structure in the construction scaffold according to the present invention has a handrail body that can be folded and tilted on the work deck, and is configured so that the handrail body can be assembled before climbing on the work deck described later. It is. The scaffolding is configured to be assembled and dismantled in the veranda of the high-rise house. The veranda 1 is composed of a veranda floor surface 3 disposed on the lower surface, a veranda ceiling wall 5 disposed on the upper surface, and a veranda side wall 7 disposed on the side surface outside the high-rise house. Hereinafter, the indoor side in the width direction of the veranda is referred to as the veranda indoor side, and the opposite side is referred to as the veranda outdoor side.

  In the drawing, the time when the scaffold 10 is viewed from the side of the veranda 1 toward the outside is referred to as a front surface, and the time when the scaffold is viewed along the longitudinal direction of the veranda 1 is referred to as a side surface. FIG. 1 is an overall perspective view of a construction scaffold (hereinafter simply referred to as a scaffold) 10 according to an embodiment, and FIG. 2 is a side view thereof. The scaffold 10 includes a plurality of framework mechanisms 11 installed in parallel in the veranda 1 along the length direction of the veranda floor 3, and a work deck 20 installed from each framework mechanism 11 to the outside of the veranda sidewall 7. It has.

  The framework mechanism 11 is not limited to the configuration as long as it is configured to stretch the veranda floor 3 and the veranda ceiling wall 5, but the framework mechanism 11 of the embodiment is as shown in FIG. In addition, a rectangular columnar vertical column 12 erected from the veranda floor 3 side toward the veranda ceiling wall 5 side, and a rectangular columnar horizontal column 13 orthogonal to the indoor side at the upper end of the vertical column 12; And a cylindrical auxiliary column 14 in which the vertical column 12 and the horizontal column 13 form a triangle by connecting the end of the horizontal column 13 on the veranda interior side and the lower end of the vertical column 12. A support base 15 supported on the veranda floor 3 so as to be adjustable in height is disposed at the lower end of the vertical column 12, and a pressing portion 16 that presses the veranda ceiling wall 5 is disposed at the upper end of the vertical column 12. Furthermore, a scaffolding base stay 17 extending toward the outside of the veranda room is disposed at the upper part of the vertical column 12. The scaffold base 21 is arranged so as to bridge the tip portions of the plurality of scaffold base stays 17, and the work deck 20 is configured by attaching the handrail body 23 to the peripheral portion of the scaffold base 21.

  The lower portion of the vertical column 12 is fitted into the support base 15 and is fixed at an appropriate position with a screw fastening or a lock pin with a magnet.

  A rectangular tube-shaped pressing portion base 161 extending along the length direction of the veranda floor surface 3 is fixed to the upper end portion of the vertical supporting column 12, and a pair of pressing portions is pressed on the pressing unit base 161. A jack 162 and a lateral support base 131 disposed between the pair of pressing jacks 162 are disposed. The horizontal support base 131 is formed in a rectangular tube shape, and is disposed along the width direction of the veranda 1 so as to be orthogonal to the pressing portion base 161. The horizontal support 13 is slidably disposed in the horizontal support base 131. A first pressing body 163 that presses the veranda ceiling wall 5 is attached to the upper end portion of the pressing jack 162, and a second pressing body 165 that presses the veranda ceiling wall 5 is attached to the upper surface of the end portion of the horizontal strut 13 on the veranda indoor side. An auxiliary jack 164 is mounted. That is, one frame mechanism 11 presses the veranda ceiling wall 5 at three locations.

  The work deck 20 includes a plate-like scaffold base 21 that spans over the scaffold base stays 17, and a skirting board 22 and a handrail body 23 that are installed around the scaffold base 21. As shown in FIG. 3, the work deck 20 according to the embodiment has three scaffold bases 21 placed on the scaffold base stays 17 protruding from the four framework mechanisms 11 (see FIG. 1). That is, in the embodiment, the scaffold base 21A is bridged between the first scaffold base stay 17A and the second scaffold base stay 17B, and the second scaffold base stay 17B and the third scaffold base stay. The scaffold base 21B is bridged over 17C, and the scaffold base 21C is bridged over the third scaffold base stay 17C and the fourth scaffold base stay 17D. On the scaffold base 21B, a hatch 211 that is installed so as to be connected to an upper end portion of a trap 30 (see FIG. 1) extending from the veranda 1 and that can be opened and closed in the vertical direction is arranged.

  As shown in FIG. 1, the handrail body 23 includes a front handrail 24 and side handrails 25 disposed on both sides of the front handrail 24. The skirting board 22 is attached to the lower part of the front handrail 24 and the side handrail 25 so as to cover the upper part of the edge part of the scaffold base 21 around the scaffold base 21. By arranging the skirting board 22, the operator's feet are prevented from jumping out of the scaffold base 21.

  The front handrail 24 is disposed along the longitudinal direction of the work deck 20, and is attached to the tip of the scaffold base stay 17. As shown in FIGS. 4 to 5, a handrail support portion 26 that supports the front handrail 24 and the side handrail 25 is disposed at the outside end of the veranda room of each scaffolding stay 17. In the embodiment, the handrail support portion 26 includes a plate-like backing plate 261 attached to the outside end of the veranda room of the four scaffolding base stays 17 and a handrail capable of inserting a pipe by being disposed on the outer surface of the backing plate 261. And a receiving portion 27. The handrail receiving portion 27 includes a pair of support plates 271 and 271 for inserting and supporting a side pipe 241b or a vertical frame column 243 of the tiltable handrail body 23 described later (see FIG. 4). A space 272 (see FIG. 4) for inserting the side pipe 241b or the vertical frame column 243 is formed between the pair of support plates 271 and 271.

  In the embodiment, as shown in FIG. 4, the front handrail 24 includes at least two horizontal frame parts 242 constituting a two-stage handrail in an outer frame body 241 that forms an upper pipe 241 a and a side pipe 241 b. Vertical frame columns 243 are arranged to form a lattice shape. The lower ends of the side pipes 241 b and the vertical frame columns 243 are inserted into the space 272 of the handrail receiving portion 27, and the front handrail 24 is erected on the scaffolding stay 17.

  As shown in FIG. 6, the front handrail 24 is tilted toward the veranda indoor side from the front end of the veranda room of the scaffolding base stay 17, and the vertical frame support 243 is formed between the upper step 243 a and the lower step 243 b. The outer frame body 241 is formed by being divided into an upper step portion and a lower step portion. That is, the pipe-shaped folding joint 28 having one opened is arranged at a position where the side pipe 241b and the upper stage part 243a and the lower stage part 243b are divided. The upper portions of the side pipe 241 b and the lower step portion 243 b of the vertical frame support 243 are connected to the folding joint 28, and the upper step portion 243 a is rotatably disposed on the folding joint 28 with a pivot 281. The lower part of the lower step part 243b is externally fitted to the outer frame column 245 and pivotally attached to the pair of support plates 271. The folding joint 28 may be arranged so that the vertical frame column 243 is sandwiched between a pair of thin plates, as long as the upper step 243a of the vertical frame column 243 can be folded with respect to the lower step 243b. It may be formed in a square pipe shape or a round pipe shape with an open end face, or any other shape. In the folding joint 28 of the embodiment, the end surface on the veranda side is formed in a square pipe shape so as to surround the upper step portion 243a of the vertical frame column 243, and the upper step portion or the vertical frame column 243 of the side pipe 241b is formed. The upper step portion 243a is pivotally mounted about the pivot 281 through the mounting plate 244.

  As described above, the lower step portion 243b is configured by being fitted into the space 272 of the handrail receiving portion 27 via the outer frame support 245 in which the vertical frame support 243 is inserted in the lower portion, and a pair of supports of the handrail receiving portion 27. The plate 271 is pivotally supported by a pivot shaft 273. When the vertical frame column 243 is in the standing posture, the vertical frame column 243 is fastened to the support plate 271 with the lock pin 32 as shown in FIG.

  As shown in FIG. 7, the lock pin 32 includes a columnar head portion 321 formed of a metal material, a columnar shaft portion 322, and a recess 321 a formed in the head portion 321 through the shaft portion 322. And an annular magnet portion 323 to be inserted. The magnet portion 323 is formed as an integrated lock pin 32 by being bonded to the head portion 321 with an adhesive. By inserting the lock pin 32 into the lower frame portion 243b of the vertical frame column 243 and the outer frame body 251 that externally fits the lower frame portion 243b and the support plate 271, the vertical frame column 243 can be held in a standing position without fastening the nut. can do.

  As shown in FIG. 4, the upper horizontal frame portion 242 a of the horizontal frame portion 242 of the handrail body 23 is extended in the horizontal direction so as to be fixed to the upper step portions 243 a of all the vertical frame columns 243. The horizontal frame portion 242b extends in the horizontal direction so as to be fixed to the outside of the lower step portion 243b of all the vertical frame columns 243. Further, between the lower steps 243 b and 243 b of the vertical frame column 243, a skirting board 22 arranged on the upper end of the scaffold base 21 is attached to the vertical frame column 243.

  One vertical frame column 243A out of the vertical frame columns 243 is stretched along the vertical frame column 243A with a wire W (first pulling means) disposed in the veranda 1 and connected to a winch (not shown). ing. A wire W is stretched over each of the pulleys 29 attached to one scaffolding stay 17, the lower end of the vertical frame support 243 </ b> A, and the folding joint 28, and the tip of the wire W is the front end of the upper step 243 a of the vertical frame support 243 </ b> A. It is hooked in the vicinity. Thereby, the handrail body 23 in the prone posture on the scaffold base 21 is placed in the standing posture by the operation of the winch. That is, when the wire W is pulled, the vertical frame support 243 moves from the prone posture to the rising posture, and the upper step portion 243a is rotated around the pivot 281 until the axes of the upper step portion 243a and the lower step portion 243b coincide. Is done. Further, as shown in FIG. 5, a wire W <b> 1 (second traction oil break) connected to the hatch 211 is stretched on the lower step portion 243 b of one vertical frame support 243 </ b> A. Therefore, the hatch 211 is opened simultaneously with the vertical frame support 243A moving to the standing posture.

  As shown in FIGS. 1 and 8, the side handrail 25 is disposed perpendicularly to the front handrail 24 from both ends of the front handrail 24 and is erected around the scaffold base 21. The side handrail 25 constitutes a two-stage handrail by disposing at least two horizontal frame parts 252 in an outer frame body 251 forming an upper frame part 251a and a side pipe 251b. The side pipe 251 b has its lower end inserted into the space 272 of the handrail receiving portion 27, and the side handrail 25 is erected on the scaffolding stay 17.

  As shown in FIGS. 6 and 9, the side handrail 25 is tiltably supported by a pair of handrail receiving portions 27 </ b> S attached to the scaffold base stays 17 at both ends of the work deck 20. The handrail receiving portion 27S includes a pair of support plates 271S and a space 272S formed between the pair of support plates 271S, and an outer frame column 255 is externally fitted to the lower portion of the side pipe 251b. The outer frame support 255 is inserted into the space 272S and pivotally attached to the pair of support plates 271S. The side handrail 25 is configured to be rotatable about a pivot 273S disposed on the pair of support plates 271S, and in a standing state, the side handrail 25 is locked to the pair of support plates 271S, the outer frame column 255, and the side pipe 251b. The rising state is maintained by inserting the. In addition, a skirting board 22 is arranged between the pair of handrail receiving portions 27 </ b> S in the upper part of the scaffolding base stay 17.

  Similar to the front handrail 24, the side handrail 25 is configured to be operable with a winch in the veranda 1. That is, as shown in FIG. 8, the extension pipe 257 connected to the outer frame column 255 is fixed to the pair of support plates 271S below the side pipe 251b on the front handrail 24 side of the pair of side pipes 251b. Are arranged. A wire W2 is stretched around the extension pipe 257 shown in FIG. The wire W2 is stretched between a pair of side handrails 25 disposed at both ends of the work deck 20. Therefore, by pulling the wire W2, the extension pipe 257 is rotated around the pivot 27S, and the pair of side handrails 25 are rotated from the tilted position toward the rising position.

  In addition, it is desirable to arrange | position the hook member which connects the front handrail 24 and the side handrail 25 in the state which the front handrail 24 and the side handrail 25 hold | maintained the standing posture. For example, if a hook member (not shown) having a hook portion formed on one side is rotatably attached at a position above the side handrail 25, when the front handrail 24 and the side handrail 25 rise, the hook portion of the hook member Can be prevented from being opened by the front handrail 24 and the side handrail 25.

  Next, the operation of the scaffold M configured as described above will be described.

  First, parts such as the framework mechanism 11, the parts constituting the work deck 20, and the laps 30 are carried to the veranda 1 of the hierarchy where the elevator works. In the veranda 1, the scaffold mechanism 11 and the work deck 20 are assembled, and the scaffold M is temporarily assembled. When assembling the framework mechanism 11, it is assembled in the veranda 1 in a state of being close to the veranda room side, the work deck 20 is mounted in a folded state, the scaffold M is moved to the veranda side wall 7 side, In the position, the framework mechanism 11 is fixed so as to stretch on the veranda floor 3 and the veranda ceiling wall. When the work deck 20 is arranged at a predetermined position, the trap 30 is arranged on the work deck 20 so that it can be raised and lowered.

  Next, before climbing to the work deck 20, the handrail body 23 of the work deck 20 is raised. When working on the work deck 20, it is determined that the handrail body 23 is raised and safety work is performed before climbing to the scaffold 21, so by raising the handrail body 23 in advance, It is necessary to surround the worker who has climbed the work deck 20. Since the handrail body 23 is in a prone posture with respect to the scaffold base 21 as shown in FIG. 6, the handrail body 23 is prone as shown in FIGS. 10 to 12 by operating a winch installed in the veranda 1. Move from posture to standing posture. In FIG. 10, the front handrail 24 is in a prone posture in a state of approaching the scaffold base 21. At this time, the upper step 243a of the vertical frame column 243 is folded at the folding joint 28 portion with respect to the lower step 243b and overlapped below the lower step 243b.

  When the winch is operated in the veranda 1 and the wire W is pulled, as shown in FIG. 11, the single vertical frame support 243 </ b> A is rotated toward the standing posture about the pivot shaft 273. Since one vertical frame column 243A is fixed by the horizontal frame portion 242 and another vertical frame column 243, the entire vertical handrail 24 rises when the vertical frame column 243A moves toward the vertical position. Will stand up towards. At this time, the upper stage 243a is slightly opened by its own weight with respect to the lower stage 243b, and the hatch 211 is stretched by the wire W1 on the vertical frame support 243A, so that the hatch 211 is combined with the vertical frame support 243A. It will open upwards.

  When the winch is operated and the wire W is further pulled, as shown in FIG. 12, the lower step portion 243b of the vertical frame post 243 is erected in the vertical direction, and when the wire W is further pulled, the upper step portion 243a is moved to the pivot 281. Is rotated with respect to the lower step portion 243b. Further, when the wire W is pulled, as shown in FIG. 5, the axes of the upper step portion 243a and the lower step portion 243b coincide with each other, the vertical frame support 243A reaches the rising posture, and the entire front handrail 24 rises. Will be reached. At the same time, the opening of the hatch 211 with respect to the scaffold 21 is completed.

  On the other hand, like the front handrail 24, the side handrail 25 is in a prone posture before the worker climbs up to the work deck 20. When the worker goes up to the work deck 20 to work on the work deck 20, the wire W2 is pulled by the winch installed in the veranda 1. As shown in FIG. 9, the side handrail 25 is moved toward the standing posture by pulling the wire W2 and rotating the extension pipe 257 around the pivot 273S together with the pair of support plates 271S.

  When the front handrail 24 and the side handrail 25 complete the movement from the prone position to the rising position, the operator goes up the lap 30 to the work deck 20 and inserts the lock pin 32 into the folding joint 28 and the support plate 271. Then, the vertical posture of the vertical frame support 243 is maintained. Further, by inserting the lock pin 32 through the pair of support plates 271 </ b> S and the vertical frame column 243, the side handrail 25 is fixed and the rising state is maintained. After that, the outer wall will be cleaned.

  When the cleaning work at the predetermined level is completed, the worker gets off from the work deck 20 into the veranda 1. After the handrail body 23 is placed in a prone state by a winch operation in the veranda 1, the work deck 20 is moved toward the interior of the veranda and the scaffold 10 is disassembled. And it moves to the next work place or hierarchy.

  As described above, according to the two-stage handrail leading structure in the construction scaffold of the present invention, the work deck 20 includes the handrail body 23 having the front handrail 24 and the side handrail 25 configured to be foldable. . The front handrail 24 and the side handrail 25 include horizontal frame portions 242 and 252 arranged in parallel at least in two steps, and a baseboard 22 provided so as to stand from the scaffold base 21 on the front handrail 24 and the side handrail 25. Thus, it is configured to be movable between a prone posture and a standing posture. That is, when the scaffold 10 is assembled in the veranda 1, the scaffold 10 is installed with the handrail body 23 in a prone posture and protruding outward from the veranda side wall 7.

  When working on the work deck 20, before the worker climbs the work deck 20, the winch is operated in the veranda 1 to raise the handrail body 23. Since the scaffolding 21 is surrounded by the front handrail 24, the side handrail 25, and the skirting board 22, the worker's safety can be protected, and the “Guidelines on the Handrail Advance Method” presented by the Ministry of Health, Labor and Welfare will be observed. be able to.

  Further, since the standing posture is maintained only by inserting the lock pin 32 through the raised front handrail 24 and the side handrail 25, the work of fastening with bolts and nuts is not performed in the work deck 20, and the bolts and nuts There is no risk of dropping the bolts or nuts during fastening.

DESCRIPTION OF SYMBOLS 1, Veranda 3, Veranda floor surface 5, Veranda ceiling wall 7, Veranda side wall 10, Scaffold 11, Frame mechanism 12, Vertical strut 13, Horizontal strut 14, Auxiliary strut 15, Support base 16, Press part 163, 1st press body 165, second pressing body 17, scaffold base stay 20, work deck 21, scaffold base 211, hatch 22, skirting board 23, handrail body 24, front handrail 25, side handrail 30, trap 32, lock pin W, wire W1 , Wire W2, wire

Claims (3)

A veranda is composed of a veranda floor surface disposed on the lower surface, a veranda ceiling wall disposed on the upper surface and a veranda side wall disposed on the side surface, and is configured to be assembled and dismantled in the veranda. A framework mechanism supported so as to stretch the veranda floor surface and the veranda ceiling wall, and a work deck provided with a scaffolding base that is disposed from the framework mechanism toward the outside of the side wall of the veranda and on which an operator works. It is a two-stage handrail leading structure in a construction scaffolding comprising:
A first pressing body that presses the veranda ceiling wall is disposed at an upper end portion of the framework mechanism, and the first pressing body is paired with a pressing portion base having a pressing jack along the length direction of the veranda. Attached and formed in a long shape along the direction from the inside of the veranda room toward the outside of the veranda room,
The work deck is provided with a handrail that surrounds the scaffold base and has at least two intermediate horizontal frame portions, and a skirting board that surrounds the scaffold base,
The scaffolding is bridged over a plurality of scaffolding stays extending from the framework mechanism,
The handrail is tiltably supported by a handrail support portion erected around the edge of the scaffold base, and stands up from the scaffold base, approaching the scaffold base and lying on the scaffold base Rutotomoni is movable in the two-position of the rising posture, has a front handrail disposed on the veranda chamber outer,
The front handrail has an upper step portion and a lower step portion, the upper step portion is configured to be foldable with respect to the lower step portion, and an upper end portion of the front handrail is a first traction that can be operated in the veranda. Towed by means,
When the handrail is in the prone posture, the upper step is folded and overlapped with the lower step,
A two-step handrail leading structure in a construction scaffold, wherein when the worker works on the work deck, the handrail is held in the standing posture before the worker climbs to the work deck . The handrail, after being moved from the pre-Symbol lying posture to the rising posture, by fixing with configured locking pin to secure magnetic force to the handrail support portion, to hold the rising attitude of the handrail The two-stage handrail leading structure in the construction scaffold according to claim 1, A hatch that can be opened and closed is disposed on the scaffolding platform, and the hatch is connected to an elevating and lowering trap disposed on the veranda, and the opening-side tip of the hatch is operable in the veranda. The two-stage handrail leading structure in a construction scaffold according to claim 2, wherein the structure is connected to the front handrail by a pulling means.

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