JP2007309029A - Single-pipe scaffold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a single-pipe scaffold which facilitates the dimensioning of the span of inner and external longitudinal single pipes and the dimensioning of a scaffold plate in a width direction and enables scaffold assembly work to be efficiently carried out and increases the rigidity of a scaffold. <P>SOLUTION: The single-pipe scaffold is provided with a horizontal brace form 4 and a handrail-brace frame 5. A clamp fastened to the inner longitudinal single pipe Pin and a clamp fastened to the external longitudinal single pipe Pou are installed with an interval F corresponding to the width dimension of the scaffold plate 2 at both the ends in the longitudinal direction of the horizontal brace form 4, and the intervals La, Lb of both the opposite clamps in the longitudinal direction of the scaffold plate are set to the dimensions corresponding to the predetermined spans Sa, Sb of the longitudinal single pipes Pin, Pou. The clamps fastened to the external longitudinal single pipe Pou are installed at upper and lower parts of both the ends in the longitudinal direction of the handrail-brace frame 5, and the intervals La, Lb of both the opposite clamps in the longitudinal direction of the scaffold plate are set to the dimensions corresponding to the predetermined spans Sa, Sb of the longitudinal single pipes Pou, Pou. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a single pipe scaffold used for external wall repair work of an apartment or the like.

  FIG. 10 is a front view of a conventional single-tube scaffold as viewed from the outside of the building. FIG. 11 is a side view of the single-tube scaffold, where the nose tip of the veranda is high, and (b) is the low tip of the nose. Is shown. This single-tube scaffold fixes the support bracket 1 to the high nose tip Wa or the low nose tip Wb of the veranda of the building, and the inner vertical single pipe Pin close to the nose tips Wa and Wb is fixed to the support bracket 1 An outer vertical single pipe Pou is arranged outside the inner vertical single pipe Pin, and a hook (not shown) of the scaffold plate 2 is engaged between the inner vertical single pipe Pin and the outer vertical single pipe Pou. The telescopic bracket 3 having a telescopic horizontal rod is interposed, the scaffold plate 2 is suspended between the horizontal rods of the telescopic brackets 3 and 3 facing in the longitudinal direction of the scaffold plate, and the inner vertical single pipe Pin and As shown in FIGS. 10 and 11, the outer vertical single pipes Pou are sequentially added and assembled in a multi-stage shape. Further, between the outer vertical single pipes Pou and Pou facing in the longitudinal direction of the scaffolding plate, a handrail 10 made of a single pipe is attached to the upper and lower two stages for each stage scaffolding plate 2.

  According to the conventional single pipe scaffold as described above, when assembling the scaffold, when the inner vertical single pipe Pin and the outer vertical single pipe Pou are erected, the vertical single pipe span (adjacent to the longitudinal direction of the scaffold plate). To determine the distance between the inner vertical single pipe Pin and the outer vertical single pipe Pou in the width direction of the scaffold plate, it takes a great deal of time to measure the distance between the axial centers of the vertical single pipes. In order to attach the second-stage vertical single pipe while adjusting the expansion and contraction of the horizontal hooks of the expansion and contraction bracket 3 one by one, it took a lot of time and effort to determine the dimensions.

  The present invention makes it easy to dimension the span of the inner and outer vertical single pipes and the distance between the inner vertical single pipe and the outer vertical single pipe in the width direction of the scaffolding plate, so that the scaffold can be assembled efficiently. It is another object of the present invention to provide a single-tube scaffold that can increase the rigidity of the scaffold.

Means for solving the above problems will be described with reference numerals in the embodiments described later. The single-pipe scaffolding of the invention according to claim 1 fixes the support bracket 1 to the veranda nose tip portions Wa and Wb of the building. The inner vertical single pipe Pin close to the building is fixed to the support bracket 1 and the outer vertical single pipe Pou is arranged outside the inner vertical single pipe Pin. A telescopic bracket 3 having a telescopic horizontal rod 6 with which a hook of the scaffolding plate 2 is engaged is interposed between the ground pipe Pou and the horizontal rods 6 of the telescopic brackets 3, 3 facing the scaffolding plate longitudinal direction. A single-pipe scaffolding in which a scaffolding plate 2 is suspended between 6 and assembled in a multistage manner,
The inner and outer horizontal members 27, 28, the horizontal members 25, 25 that connect the ends of the horizontal members 27, 28, and the brace 26 that is stretched obliquely between the horizontal members 25, 25. It is stretched diagonally between the brace frame 4, the upper and lower horizontal members 29, 29, the vertical members 30, 30 connecting the ends of the horizontal members 29, 29, and the horizontal members 29, 29. A handrail / brace frame 5 made of a breath 33,
The horizontal brace frame 4 includes a clamp 7 clamped by the inner vertical single pipe Pin and a clamp 8 clamped by the outer vertical single pipe Pou at both ends in the longitudinal direction, respectively. The distances La and Lb between the clamps 7 and 7 (8 and 8) facing in the longitudinal direction of the scaffolding plate are set to dimensions corresponding to the predetermined spans Sa and Sb of the vertical single pipes Pin and Pou. Set at least under the first stage scaffolding plate 2, the handrail / brace frame 5 has clamps 9 clamped by the outer vertical single pipe Pou on both ends in the longitudinal direction. The intervals La and Lb between the clamps 9 and 9 facing in the longitudinal direction of the scaffolding plate are sized to correspond to the predetermined spans Sa and Sb of the vertical single pipes Pou and Pou. It is installed between the earth pipes Pou and Pou.

  The second aspect of the present invention is the single tube scaffold according to the first aspect, wherein the two clamps 9, 9 facing the scaffold plate longitudinal direction at both ends of the handrail / brace frame 5 are stepped up and down by about one clamp. It is attached to.

  The effect of the invention by the above-described solution means will be described with reference numerals in the embodiments described later. According to the single-pipe scaffolding of the invention according to claim 1, the horizontal breath frame 4 is respectively provided at both longitudinal ends thereof. The clamp 7 clamped by the inner vertical single pipe Pin and the clamp 8 clamped by the outer vertical single pipe Pou are provided at an interval F corresponding to the width dimension of the scaffold plate 2, and the longitudinal direction of the scaffold plate The distances La and Lb between the two clamps 7 and 7 (8, 8) facing each other are set to dimensions corresponding to the predetermined spans Sa and Sb of the single vertical pipes Pin and Pou. Clamps 9 clamped by the outer vertical single pipe Pou are provided at the upper and lower parts at both ends in the longitudinal direction, and the distances La and Lb between the clamps 9 and 9 facing in the longitudinal direction of the scaffolding plate are set in the vertical direction. The dimensions corresponding to the predetermined spans Sa and Sb of the pipes Pou and Pou When assembling the single pipe scaffold, the horizontal brace frame 4 and the handrail / brace frame 5 are used to measure the width of the scaffold plate between the inner vertical single pipe Pin and the outer vertical single pipe Pou and It is easy to determine the span of the vertical single pipes Pin and Pou, and the single pipe scaffold can be assembled efficiently.

  The horizontal brace frame 4 is slanted between the inner and outer horizontal members 27, 28, the two horizontal members 25, 25 that connect the ends of the horizontal members 27, 28, and the horizontal members 25, 25. The handrail / brace frame 5 includes the upper and lower horizontal members 29, 29, both vertical members 30, 30 connecting the ends of the horizontal members 29, 29, and Since it consists of the brace | cross 33 stretched diagonally between both the horizontal materials 29 and 29, the rigidity of a single pipe | tube scaffold can be improved by using the horizontal brace | frame 4 and the handrail and brace | frame 5.

  According to the single-tube scaffold of the invention according to claim 2, the clamps 9 and 9 facing the scaffold plate longitudinal direction at both ends of the handrail / brace frame 5 are attached so as to be stepped up and down by about one clamp. Therefore, when the handrail / brace frame 5 is installed adjacent to the handrail longitudinal direction, the clamp of one handrail / brace frame 5 interferes with the clamp of the other handrail / brace frame 5 adjacent thereto. Without any problem, each handrail / brace frame 5 can be installed in good appearance at the same level.

  A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a single pipe scaffold according to the present invention as viewed from the outside of a building, and FIG. 2 is a side view of the single pipe scaffold. When the nose tip of the veranda is high, (b) shows the case where the nose tip is low. In the figure, Wa is the high nose tip of the veranda, Wb is the low nose tip of the veranda, Pin and Pou are the vertical single pipes for the scaffolding, and Pin is arranged with a predetermined span in the longitudinal direction of the scaffolding plate on the side close to the building. The inner vertical single pipe, Pou is an outer vertical single pipe arranged from the inner vertical single pipe Pin to the outside with a distance corresponding to the width dimension of the scaffold plate. Are arranged in the same span. Reference numeral 1 is a support bracket, 2 is a scaffold plate, 3 is a telescopic bracket, 4 is a horizontal brace frame, and 5 is a handrail / brace frame.

  3 (a) is an enlarged view of the portion surrounded by the arrow X in FIG. 2 (a), and is a side view of the state where the support bracket 1 is attached to the high nose tip Wa of the veranda. FIG. 4B is an enlarged view of a portion surrounded by an arrow Y, and is a side view of the support bracket 1 attached to the low nose tip portion Wb of the veranda. FIG. 4A is an enlarged detailed side view of the support bracket 1; b) is a plan view thereof, and FIG. 5 is a side view of the telescopic bracket 3. 6 (a) is a front view of the horizontal brace frame 4, (b) is a plan view, (c) is a right side view, and FIG. 7 (a) is surrounded by an arrow Q in FIG. 6 (a). (B) is a drawing viewed from the arrow R in FIG. 7 (a). 8 (a) is a front view of the handrail / brace frame 5, (b) is a plan view, (c) is a right side view, and FIG. 9 (a) is indicated by an arrow M in FIG. 8 (a). FIG. 9B is an enlarged view of the enclosed part, and FIG. 9B is a drawing viewed from the arrow N in FIG.

  As can be seen from FIGS. 3 and 4, the support bracket 1 extends horizontally downward from the horizontal member 11 horizontally disposed along the upper end surfaces of the nose tip portions Wa and Wb, and the base end portion of the horizontal member 11. It consists of a bracket body 13 formed in an L shape with a vertical member 12, and a slide member 14 is attached to the horizontal member 11 so as to be fixed by a fixing bolt 15 at a required position, The fastening screw shaft 16 is screwed, a stopper 17 is attached to the tip of the fastening screw shaft 16, and the vertical member 12 is attached with a clamp 18 for gripping and tightening the inner vertical single pipe Pin. Yes. The clamp 18 is a known pipe clamp and has a structure as shown in FIGS.

  When the support bracket 1 is used, the horizontal member 11 of the bracket body 13 is placed on the upper end surfaces of the veranda nose tip portions Wa and Wb, and the vertical member 12 is applied to the outer side surfaces of the nose tip portions Wa and Wb. The bracket main body 13 is fixed to the nose tip portions Wa and Wb by pressing the stopper 17 at the tip portion against the inner side surface of the nose tip portions Wa and Wb while rotating the fastening screw shaft 16 in the tightening direction from the inside. be able to.

  As shown in FIG. 5, the telescopic bracket 3 includes a telescopic horizontal rod 6 with which a hook (not shown) of the scaffolding plate 2 is engaged, and a vertical rod 19 extending vertically downward from the base end of the horizontal rod 6. A bracket body 20 made of The horizontal rod 6 is composed of a cylindrical fixing rod 6a and an expansion / contraction rod 6b that is telescopically fitted to the cylindrical fixing rod 6a. A telescopic rod 6b is required at the tip of the fixing rod 6a. The fixing bolt 21 for fixing to the fixing rod 6a is provided at the expansion / contraction position, the clamp 22 clamped by the outer vertical single pipe Pou is provided at the tip of the expansion / contraction rod 6b, and the inner vertical ground is provided on the vertical rod 19 The clamp 23 clamped by the single pipe Pin and the receiving metal fitting 24 which receives the inner vertical single pipe Pin are provided. A brace 25 is stretched between the tip of the cylindrical fixed rod 6a and the vertical rod 19. The clamps 22 and 23 are also known pipe clamps having a structure as shown in FIGS.

  When using the telescopic bracket 3, as shown in FIG. 3, a clamp 23 on the vertical rod 19 side is attached to a required portion of the inner vertical single pipe Pin supported by the support bracket 1 fixed to the veranda nose tip portions Wa and Wb. In a state where it is clamped and the receiving bracket 24 is received and fixed, the horizontal rod 6 may be appropriately expanded and contracted to clamp the clamp 22 at the tip of the single vertical tube Pou.

  As shown in FIGS. 6 (a), 6 (b), and 6 (c), the horizontal brace frame 4 has an inner horizontal member 27, an outer horizontal member 28, and both sides connecting the ends of the horizontal members 27, 28. It consists of a material 25, 25 and a brace 26 stretched obliquely between both horizontal members 27, 28, as can be seen from FIG. The clamp 7 clamped by the inner vertical single pipe Pin and the clamp 8 clamped by the outer vertical single pipe Pou are provided at an interval F corresponding to the width dimension of the scaffold plate 2, and the longitudinal direction of the scaffold plate The distances La and Lb between the two clamps 7 and 7 (8, 8) facing each other are set to dimensions corresponding to predetermined spans Sa and Sb (see FIG. 1) of the vertical ground single pipes Pin and Pou. As shown in FIG. 1, Sa and Sb which are spans between single vertical pipes have different dimensions, and the distance La between the clamps 7 and 7 (8, 8) facing in the longitudinal direction of the scaffolding plate. Is set to a dimension corresponding to the span Sa, and the distance Lb between the clamps 7 and 7 (8, 8) is set to a dimension corresponding to the span Sb.

  Each of the clamps 7 and 8 is a pipe clamp having a well-known structure as shown in FIGS. 7A and 7B, and includes a fixed holding member 31 and a movable holding member 32. Both the fixed and movable holding members 31, 32 is pivotally attached to a shaft 37 so as to open and close each other, and a fastening bolt 34 is rotatably attached to a rotating shaft 36 at a base end portion of the fixed gripping member 31, and a free end portion of the movable gripping member 32. Is provided with an insertion groove 32a into which the fastening bolt 34 is inserted, and the fixed gripping member 31 is bolted to the U-shaped mounting piece 39 fixed to the ends of the horizontal members 27 and 28 of the horizontal breath frame 4. 38 is fixedly attached. When the vertical ground single pipes Pin and Pou are clamped by the clamps 7 and 8, the movable gripping member 32 is rotated and opened, and the vertical ground single pipes Pin and Pou are held by the gripping members 31 and 32. The fastening bolts 34 are engaged with the insertion grooves 37, and the gripping members 31 and 32 are fastened with the nuts 35 from the outside.

  As shown in FIGS. 8 (a), 8 (b), and 8 (c), the handrail / brace frame 5 is formed by connecting the upper and lower horizontal members 29, 29 and the ends of the horizontal members 29, 29 together. It consists of vertical members 30, 30 and a brace 33 stretched obliquely between both horizontal members 29, 29. As can be seen from (a) of FIG. Clamps 9 clamped by the outer vertical single pipe Pou are provided on the upper and lower parts, and the distances La and Lb between the clamps 9 and 9 facing in the longitudinal direction of the scaffolding plate are set to a predetermined span Sa of the vertical single pipes in and Pou. , Sb (see FIG. 1). The interval La is set to a dimension corresponding to the span Sa, and the interval Lb is set to a dimension corresponding to the span Sb.

  As can be seen from FIG. 8 (a), the clamps 9 and 9 facing the longitudinal direction of the scaffolding plate at both ends of the handrail / brace frame 5 are mounted so as to be stepped up and down by about one clamp. Yes. This is because when the handrail / brace frame 5 is installed adjacent to the handrail in the longitudinal direction, the clamp of one handrail / brace frame 5 and the clamp of the other handrail / brace frame 5 adjacent thereto are at the same level. This is because the clamps 9 and 9 interfere with each other so that the clamp cannot be attached to the outer vertical single pipe Pou. Therefore, by attaching the clamps 9 and 9 facing the longitudinal direction of the scaffolding plate at both ends so as to be stepped up and down by about one clamp, each handrail / brace frame 5 can be installed in a good manner at the same level. .

  The clamps 9 of the handrail / brace frame 5 are shown in FIGS. 9 (a) and 9 (b). The clamps 7 and 8 of the horizontal brace frame 4 described with reference to FIGS. 7 (a) and 7 (b) Since they have the same structure, the same members are denoted by the same reference numerals and description thereof is omitted.

  Next, assembly of the single tube scaffold configured as described above will be described with reference to FIGS. 1 and 2 and other drawings as appropriate. First, the support bracket 1 is fixed to the high nose tip portion Wa or the low nose tip portion Wb of the veranda of the building, and the inner vertical single pipe Pin is fixed to the support bracket 1 by the clamp 18 and held in a vertical posture. One end of the first extension bracket 3 is fixed to the inner vertical single pipe Pin with a clamp 23 (see FIG. 5). The horizontal rod 6 of each telescopic bracket 3 is kept in a contracted state.

  Then, for example, clamps at one end of the horizontal brace frame 4 shown in FIG. 6 are attached to the lower ends of the outer vertical single pipe Pou arranged at the right end of FIG. 1 and the inner vertical single pipe Pin positioned opposite to the inner vertical single pipe Pou. 7 and 8 are respectively clamped, and clamps 7 and 8 at the other end of the horizontal brace frame 4 are installed on the outside vertical single pipe Pou arranged second from the right end in FIG. In the state where each inner vertical ground pipe Pin is clamped and each outer vertical ground pipe Pou is in a vertical posture, the horizontal rod 6 of the telescopic bracket 3 is extended, and the clamp 22 at the tip thereof is connected to the outer vertical ground single pipe. When the pipe Pou is clamped, the width of the scaffold plate 2 is determined by the horizontal brace frame 4 and the telescopic bracket 3 on the upper side.

  When the width of the scaffolding plate 2 is thus determined, the first-stage scaffolding plate 2 is hung between the horizontal rods 6 and 6 of the telescopic brackets 3 and 3 facing in the longitudinal direction of the scaffolding plate, and as shown in FIG. A handrail-and-breath frame 5 is installed between the outer vertical single pipes Pou and Pou facing the scaffolding plate longitudinal direction at a position higher than 2. When the handrail / brace frame 5 is installed, the handrail / brace frame 5 is disposed between the outer vertical single pipes Pou, Pou, and the clamps 9, 9 at both ends of the breath frame 5 are connected to the outer vertical single pipe Pou. , Pou can be clamped.

  After attaching the first-stage scaffolding plate 2 and its handrail / brace frame 5, the horizontal rod 6 of the second-stage scaffolding plate extension bracket 3 fixed to the inner vertical single pipe Pin is extended, and its tip The second stage scaffolding plate 2 is hung between the horizontal rods 6 and 6 of the telescopic brackets 3 and 3 opposed to the longitudinal direction of the scaffolding plate, A handrail / brace frame 5 is installed between the outer vertical single pipes Pou and Pou facing the longitudinal direction of the scaffolding plate at a position higher than the scaffolding plate 2. Further, as shown in FIG. 2, the telescopic bracket 3 installed between the handrail / brace frame 5 of the first stage scaffolding plate 2 and the handrail / brace frame 5 of the second stage scaffolding plate 2 is also provided with the horizontal hook. 6 is extended and the clamp 22 of the front-end | tip part is clamped by the outer vertical single pipe Pou.

  After attaching the second-stage scaffolding plate 2 and its handrail / brace frame 5, the horizontal rod 6 of the second-stage scaffolding plate extension telescopic bracket 3 fixed to the inner vertical single pipe Pin is extended, and its tip The clamp 22 is clamped to the outer vertical single pipe Pou, and the third stage scaffolding plate 2 is hung between the horizontal rods 6 and 6 of the telescopic brackets 3 and 3 facing in the longitudinal direction of the scaffolding plate. A handrail-and-breath frame 5 is installed between the outer vertical single pipes Pou and Pou facing the longitudinal direction of the scaffolding plate at a position higher than the plate 2. Thereafter, the multistage single-tube scaffold is assembled by performing the same operation as described above.

  In this embodiment, the horizontal brace frame 4 is provided on the lower side of the first stage scaffolding plate 2, the lower side of the third stage scaffolding plate 2, and the lower side of the fourth stage scaffolding plate 2. It may be provided on the lower side of the scaffolding plate 2 or may be provided only on the lower side of the first stage scaffolding plate 2.

  In the embodiment, the span of the vertical single pipes Pin and Pou has two types of spans in which Sa and Sb longer than this are alternately repeated. Therefore, in the single pipe scaffold of this embodiment, Two types of horizontal brace frame 4 and handrail / brace frame 5 are used.

  As described above, in the single pipe scaffold of the present invention, the horizontal brace frame 4 is gripped by the clamp 7 that is clamped by the inner vertical single pipe Pin and the outer vertical single pipe Pou at both ends in the longitudinal direction. The clamps 8 to be tightened are provided at intervals F corresponding to the width dimension of the scaffolding plate 2, and the intervals La and Lb between both clamps 7 and 7 (8, 8) facing in the longitudinal direction of the scaffolding plate 2 Pins and Pou are set to dimensions corresponding to predetermined spans Sa and Sb, and the handrail / brace frame 5 has clamps 9 clamped by the outer vertical single pipe Pou at both ends in the longitudinal direction, respectively. It is provided at the upper and lower parts, and the distances La and Lb between the clamps 9 and 9 facing in the longitudinal direction of the scaffold plate are dimensioned to correspond to the predetermined spans Sa and Sb of the vertical single pipes Pou and Pou. When assembling the horizontal brace frame 4 and the handrail / brace frame 5 By doing so, it becomes easy to measure the width of the scaffold plate between the inner vertical single pipe Pin and the outer vertical single pipe Pou and the span of the vertical single pipes Pin, Pou, and assemble the single pipe scaffold. Work can be done efficiently.

  The horizontal brace frame 4 is slanted between the inner and outer horizontal members 27, 28, the two horizontal members 25, 25 that connect the ends of the horizontal members 27, 28, and the horizontal members 25, 25. The handrail / brace frame 5 includes the upper and lower horizontal members 29, 29, both vertical members 30, 30 connecting the ends of the horizontal members 29, 29, and Since it is composed of the brace 33 stretched obliquely between the two horizontal members 29, 29, the use of these horizontal brace frame 4 and handrail / brace frame 5 can increase the rigidity of the single pipe scaffold. it can.

It is the front view which looked at the single pipe scaffold which concerns on this invention from the outer side of a building. In the side view of the single-tube scaffold, when the nose tip of the veranda is high, (b) shows the case where the nose tip is low. (a) is an enlarged view of the part surrounded by arrow X in FIG. 2 (a), a side view with the support bracket attached to the high nose tip of the veranda, and (b) in FIG. 2 (a). It is an enlarged view of a portion surrounded by Y. It is a side view of the state which attached the support bracket to the low nose tip part of the veranda. (a) is an enlarged detailed side view of the support bracket, and (b) is a plan view thereof. It is a side view of an expansion-contraction bracket. (a) is an enlarged view of a portion surrounded by an arrow Q in (a) of FIG. 6, and (b) is a drawing viewed from an arrow R in (b) of FIG. 6. (a) is a front view of a handrail / brace frame, (b) is a plan view, and (c) is a right side view. (a) is an enlarged view of a portion surrounded by an arrow M in (a) of FIG. 8, and (b) is a drawing viewed from an arrow N in (b) of FIG. It is the front view which looked at the conventional single pipe scaffold from the outside of a building. In the side view of the single tube scaffold, (a) shows the case where the nose tip of the veranda is high, and (b) shows the case where the nose tip is low.

Explanation of symbols

Pin Inner vertical single pipe Pou Outer vertical single pipe 1 Support bracket 2 Scaffolding plate 3 Telescopic bracket 4 Horizontal brace frame 5 Handrail / brace frame 6 Horizontal bracket 7, 8 Horizontal brace frame clamp 9 Handrail / brace frame Clamp

Claims (2)

A support bracket is fixed to the nose of the veranda of the building, and an inner vertical single pipe close to the building is fixed to the support bracket. An outer vertical single pipe is arranged outside the inner vertical single pipe, and an inner vertical ground is arranged. Between the single pipe and the outer vertical single pipe, an elastic bracket with a stretchable horizontal rod that hooks the hook of the scaffold plate is interposed, and the scaffold plate is between the horizontal brackets of the telescopic bracket facing the longitudinal direction of the scaffold plate It is a single pipe scaffold that is hung and assembled in a multi-stage shape,
Both inner and outer horizontal members, both horizontal members that connect the ends of both horizontal members, a horizontal brace frame consisting of a brace stretched diagonally between both horizontal members, and both upper and lower horizontal members, Both vertical members that connect the ends of both horizontal members, and a handrail and brace frame consisting of a brace stretched diagonally between both horizontal members,
The horizontal brace frame is provided with clamps clamped by the inner vertical single pipe and clamps clamped by the outer vertical single pipe at intervals corresponding to the width dimension of the scaffolding plate at both ends in the longitudinal direction. In addition, the distance between both clamps facing in the longitudinal direction of the scaffolding plate is set to a dimension corresponding to a predetermined span of the vertical ground single pipe, installed at least under the first stage scaffolding plate, Clamps clamped by the outer vertical single pipe are provided at the upper and lower parts at both ends in the longitudinal direction, and the distance between both clamps facing the longitudinal direction of the scaffold plate corresponds to the predetermined span of the vertical single pipe A single-tube scaffold characterized by being installed between the outer vertical single tubes at each stage. The single-tube scaffold according to claim 1, wherein both clamps facing in the longitudinal direction of the scaffolding plate at both ends of the handrail / brace frame are attached so as to be stepped up and down by about one clamp.

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