JP2014080799A - Scaffolding handrail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scaffolding handrail which is mounted to a curved scaffold floor such as an annular scaffold floor constructed along the exterior wall of a building such as a columnar tower.SOLUTION: A scaffolding handrail comprises a horizontal member which is arranged between a pair of adjacent support posts, and a pair of diagonal members which are pivotably connected to both ends of the horizontal member through pivots and intersected with each other below the horizontal member. An upper locking mechanism, which is provided in an extension part extended across the pivot from a diagonal member, is locked to a wedge hole of an upper flange, and a lower locking mechanism, which is provided in the lower end of the other diagonal member, is locked to a wedge hole of a lower flange. The upper locking mechanism (31) and the lower locking mechanism (32) facing the same support post are provided with an upper shaft member (37) and a lower shaft member (47) which are coaxially arranged with respect to an axis (V) passing through the wedge hole (25) of the upper flange (22a) and the wedge hole (25) of the lower flange (22b). The upper shaft member and the lower shaft member are pivotally connected to the wedge holes so as to be rotatable around the axis.

Description

The present invention is a handrail in a temporary scaffold constructed at a construction site or the like, and in particular, with respect to a bending scaffold floor such as an annular scaffold floor constructed along an outer wall of a building such as a columnar tower, a leading handrail It is related with the handrail for scaffolds which can be suitably attached as.

Conventionally, for the construction of a temporary scaffold at a construction site or the like, a handrail advance construction method has been recommended for the safety of workers. In the case of a wedge-tightened temporary scaffold, the column has a flange having a wedge hole arranged vertically, and is configured to attach a leading handrail to the flange. Such a leading handrail is connected to a horizontal member disposed between a pair of adjacent struts, and is pivotally connected to both end portions of the horizontal member via pivots and below the horizontal member. The upper locking means provided at the upper end of the diagonal material is locked to the upper flange of one strut, and the lower fixing means provided at the lower end of the diagonal material is the other. It is comprised so that it may adhere to the lower flange of the support | pillar.

JP 2010-229700 A JP 2012-132157 A

The prior handrail described in Patent Document 2 proposed by the present applicant has a basic configuration as shown in FIGS.

FIG. 9 and FIG. 10 show a wedge-tightening type temporary scaffold, and each support column 1 has a flange 2 fixed at a predetermined interval in the vertical direction, and a scaffold plate is interposed between the support columns via a horizontal member. A work floor is formed by installing 3. The handrail 4 is a leading handrail, and based on the handrail advanced method, before installing the upper work floor, the operator attaches the upper handrail 4 on the lower work floor, and then installs the upper work floor. By installing and repeating the same work from the lower layer to the upper layer, it can be attached to the girder side of the work floor of each layer.

The handrail 4 is connected to a horizontal member 5 disposed substantially horizontally between a pair of adjacent support columns 1 and 1 and is pivotally connected to both ends of the horizontal member 5 via pivots 6 so as to cross each other. Each diagonal member 7 is provided with an upper locking mechanism 9 in an extension 8 extending from the upper end beyond the pivot 6 and having a lower end. The lower fixing mechanism 10 is provided in the part.

As shown in FIGS. 10 and 11, the upper locking mechanism 9 includes a shaft member 12 provided in the extension portion 8, and rotates the diagonal member 7 via the pivot shaft 6. By rotating downward, the shaft member 12 is configured to enter and lock into the wedge hole 11 from above the upper flange 2a.

The lower fixing mechanism 10 includes a chin fitting 13 fixed to the lower end portion of the diagonal member 7, and is provided with a wedge member 16 that is detachably inserted from the upper jaw 14 to the lower jaw 15 of the chin fitting 13. The lower flange 2b is inserted between the upper and lower jaws 14 and 15 with the wedge member 16 retracted, and the wedge member 16 is driven into the wedge hole 11 of the lower flange 2b, whereby the jaw fitting 13 and the lower flange 2b. Are configured to be tightly coupled with each other.

At this time, the wedge holes 11 of the flange 2 constitute four cross-shaped elongated holes extending in the radial direction from the center of the support column 1, and the wedge member 16 is wedge-coupled to the elongated hole-shaped wedge hole 11. The cross section is formed in a rectangular shape.

In the case of the ordinary scaffold construction shown in FIG. 11, each column 1 directs the longitudinal directivity line P1 of the wedge hole 11x for binding the horizontal member parallel to the wife edge of the scaffold plate 3, and the handrail 4 The directional line P <b> 2 in the longitudinal direction of the wedge hole 11 for attachment is installed so as to be parallel to the beam edge of the scaffold plate 3. Therefore, with respect to the direction in which the handrail 4 extends (the axis L of the horizontal member 5), the lower fixing mechanism 10 has the long hole-shaped wedge hole 11 and the wedge member 16 having a rectangular cross section that match each other. It can be driven into the hole 11 and tightened.

However, in the case of a scaffold construction constructed along the outer wall curved surface of a building such as a columnar tower as shown in FIG. 1 to be described later, in order to construct the horizontal member that supports the annular work floor in the radial direction of the outer wall curved surface. As shown in FIG. 12, each support column 1 is installed with the directional line P1 in the longitudinal direction of the wedge hole 11x for binding the horizontal member directed toward the center of the outer wall curved surface. As a result, the directional line P2 in the longitudinal direction of the wedge hole 11 for attaching the handrail 4 is displaced so as to be non-parallel to the spar of the scaffold plate 3. That is, the directional line P2 of the wedge hole 11 and the extending direction of the handrail 4 (the axis L of the horizontal member 5) are inclined and deviated from each other. For this reason, the problem that the wedge member 16 of the lower fixing mechanism 10 cannot be driven into the wedge hole 11 is raised.

In order to solve the above problem, it is sufficient to provide the lower fixing mechanism 10 in which the direction of the wedge member 16 is designed so as to match the directional line P2 in which the wedge hole 11 is displaced, but it is necessary to construct a scaffold. Buildings such as cylindrical towers vary in size, the curvature of the outer wall curved surface varies depending on the site, and the deviation of the directional line P2 of the wedge hole 11 is not uniform. Is necessary and not realistic.

Further, the above-described conventional handrail 4 has a configuration in which the lower end portions of the diagonal members 7, 7 intersecting with the lower fixing mechanism 10 provided with the wedge member 16 are tightly fixed to the flange 2 of the support column 1. Therefore, when the scaffold structure is distorted by being swung and swung due to a strong wind or the like, the lower end portion of the diagonal member 7 fixed to the support column 1 follows and swings to the upper end portion of the diagonal member 7. There is a possibility that the shaft member 12 of the provided upper locking mechanism 9 may escape from the wedge hole 11 of the flange 2. Alternatively, when the diagonal members 7 and 7 are distorted together with the scaffold structure, the shaft member 12 of the upper locking mechanism 9 or the wedge member 16 or the flanges 2a and 2b of the lower fixing mechanism 10 may be deformed and damaged. Therefore, from this point of view, the means for attaching the lower end portion of the diagonal member 7 to the flange 2 of the support column 1 is not completely fixed by the wedge fastening means as in the prior art, but is distorted such as swinging of the support column 1. It is desirable to make it absorbable.

The present invention provides a scaffolding handrail that solves the above-mentioned problems, and as a means for constructing it, a handrail is provided along the side portion of the scaffolding plate installed on the support column, and has a wedge hole. A horizontal member disposed between a pair of adjacent pillars with respect to a pillar in which a flange is vertically arranged, and pivotally connected to both ends of the horizontal member via pivots, and the horizontal member A pair of diagonal members that cross each other at the lower side, and an upper locking mechanism provided on an extension portion extending from the diagonal member beyond the pivot is locked to the wedge hole of the upper flange, and the diagonal member In the configuration in which the lower locking mechanism provided at the lower end portion of the upper flange is locked to the wedge hole of the lower flange, the upper locking mechanism and the lower locking mechanism are respectively connected to the wedge hole of the upper flange and the wedge hole of the lower flange. An upper shaft member and a lower shaft member that are pivotally attached to the shaft are provided. There is a point. At this time, the upper shaft member and the lower shaft member in the upper locking mechanism and the lower locking mechanism facing the same column are mutually connected with respect to the axis V passing through the wedge hole of the upper flange and the wedge hole of the lower flange facing each other. It is preferable to arrange them coaxially.

The upper locking mechanism rotates from the top to the wedge hole of the upper flange by rotating integrally with the extension of the diagonal member via the pivot when the pair of diagonal members are crossed below the horizontal member. Preferably, the upper locking member is pivotally supported by the wedge hole, and the lower locking mechanism has a lower locking mechanism when a pair of diagonal members are crossed below the horizontal member. With the lower flange inserted between the upper and lower jaws facing the upper and lower surfaces of the side flange and the upper and lower jaws, one jaw is removably inserted into the other jaw, and the wedge hole is inserted. It is preferable that the lower shaft member is pivotally supported.

Furthermore, the lower locking mechanism is provided with an upper cylinder member and a lower cylinder member arranged coaxially with each other on the upper jaw and the lower jaw, respectively, and the lower shaft member can be advanced and retracted from one cylinder member to the other cylinder member. It is preferable that a spring is provided that is inserted into the lower shaft member and elastically biases the lower shaft member in the insertion direction.

According to the present invention, when the handrail 26 is attached along the spar side of the scaffold plate 24 in the bent scaffold floor constructed along the curved outer wall surface of the building such as a cylindrical tower, the upper locking mechanism 31 and the lower locking mechanism 32 can be suitably attached to the upper flange 22a and the lower flange 22b, respectively, by a simple one-touch operation.

By the way, when the handrail 26 is attached between the pillars of the scaffold structure forming the bent scaffold floor, the extension direction of the handrail 26 (the axis L of the horizontal member 27) and the directivity line P2 in the longitudinal direction of the wedge hole 25 are mutually connected. Since it is displaced so as to be non-parallel, it is difficult to attach the handrail 26. However, according to the present invention, the upper locking mechanism 31 and the lower locking mechanism 32 are respectively connected to the upper shaft member 37 made of pins and the like. Since it is constituted by the lower shaft member 47, it can be suitably inserted and locked in the wedge holes 25, 25 of the upper flange 22a and the lower flange 22b.

In particular, according to the present invention, the upper shaft member 37 and the lower shaft member 47 pass through the upper and lower wedge holes 25, 25 while being inserted and locked into the wedge holes 25, 25 of the upper flange 22a and the lower flange 22b. Even if the crossed diagonal members 29 and 29 are distorted, for example, the scaffold construction is beaten by a strong wind or the like because it is pivotally attached to the vertical axis V in the direction around the axis. The upper shaft member 37 and the lower shaft member 47 can freely rotate to absorb distortion, thereby suitably preventing breakage due to detachment or deformation of the locking portion. At this time, if the upper shaft member 37 and the lower shaft member 47 are arranged coaxially as described in claim 2, there is no possibility that the upper locking mechanism 31 and the lower locking mechanism 32 are distorted with each other, The diagonal members 29 and 29 can be easily rotated around the same axis, and the above-described distortion can be suitably absorbed.

It is a top view which shows the state attached to the scaffold construction body constructed | assembled along the outer wall of buildings, such as an annular tower, regarding the handrail which concerns on one Embodiment of this invention. It is a front view which shows the attachment state of the handrail which concerns on one Embodiment of this invention. It is a front view which expands and shows the attachment state of the upper locking mechanism and lower locking mechanism in one Embodiment of this invention. It is an enlarged view which shows the attachment method of an upper latching mechanism. It is an enlarged view which shows the attachment method of a lower latching mechanism. It is a perspective view which shows the attachment method of an upper locking mechanism and a lower locking mechanism. It is a perspective view which shows the effect | action of the attachment state of an upper locking mechanism and a lower locking mechanism. The other embodiment of an upper locking mechanism is shown, (A) is a front view which shows 2nd Embodiment, (B) is a front view which shows 3rd Embodiment. It is a front view which shows the attachment state of the handrail which concerns on a prior art. It is a front view which shows the attachment method of the handrail which concerns on a prior art. It is a perspective view which shows the method of attaching the handrail which concerns on a prior art to a normal scaffold construction body. It is a perspective view explaining the problem of the handrail which concerns on a prior art.

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

FIG. 1 exemplifies a temporary scaffold having a flange-type wedge-tightened structure in which an annular work floor is formed in a bent shape along a curved outer wall surface of a cylindrical tower-shaped building. As shown in FIG.1 and FIG.2, the support | pillar 21 has fixed the flange 22 which consists of a metal plate at predetermined intervals up and down, and is the perspective direction (henceforth "wife direction") with respect to outer walls, such as a building. As a pair, a pair of support columns 21 and 21 erected at a predetermined interval are set up at a predetermined interval in a direction along the outer wall of a building or the like (hereinafter referred to as “girder direction”). At this time, the distance L1 between the pair of struts 21 and 21 located on the outer side of the wife side and the distance L2 between the pair of struts 21 and 21 located on the inner side of the wife side are L2 <L1 and are adjacent in the wife direction. A horizontal member 23 constructed between the pair of support columns 21 is disposed in a radial direction with respect to the center of the ring. The support column 21 and the horizontal member 23 are fixed to each other by a binding means having a wedge structure, and a scaffolding plate 24 is mounted on the horizontal members 23 and 23 adjacent to each other in the spar direction, thereby forming a work floor.

As shown in FIG. 6, each flange 22 of each column 21 forms a wedge hole 25 consisting of four cross-shaped elongated holes extending radially from the center of the column 21, and the radial direction of the outer wall curved surface The horizontal member 23 is wedge-tightened in the wedge hole 25 located on the line (see FIG. 1).

As the work floor formed by the scaffolding plate 24, the upper working floor is constructed in order from the lower layer, and a handrail 26 that shields the space on the side of the girder within a predetermined height from each scaffolding plate 24 is attached. These handrails 26 are based on the handrail prior construction method, before an upper work floor is formed, an operator attaches an upper handrail 26 from a lower work floor, and then forms an upper work floor. By repeating the work from the lower layer to the upper layer, the handrail 26 is attached to the girder side of the work floor of each layer.

As shown in FIGS. 2 and 3, the handrail 26 includes a horizontal member 27 disposed substantially horizontally between a pair of adjacent columns 21, 21, and a pivot 28 on both ends of the horizontal member 27 via a pivot 28. It is composed of a pair of diagonal members 29, 29 that are pivotably connected and attached in a state of crossing each other. Each diagonal member 29 is provided with an upper locking mechanism 31 at an extension 30 extending from the upper end portion beyond the pivot 28 and a lower locking mechanism 32 at a lower end portion. The lower locking mechanism 32 is locked to the lower flange 22b of the column 21 and is locked to the wedge hole 25 of the upper flange 22a of the column 21. Although not shown, the horizontal member 27 of the handrail 26 constitutes an expansion / contraction mechanism by slidably fitting the outer tube and the inner tube, and the intervals are different as in the above-described L2 <L1. It is preferable that the column 21 is configured so that it can be attached to the column 21 at will.

(Upper locking mechanism)
The horizontal member 27 has a downward bracket 33 extending at both ends, and a diagonal member 29 is pivotally connected to the bracket 33. The extension part 30 of the diagonal member 29 may be formed by extending the tip part of the diagonal member 29 integrally, but in the case of the illustrated embodiment, a plate-like extension member 34 separate from the diagonal member 29 is provided. In this state, the front end of the diagonal member 29 is overlapped and fixed by welding or fitting, and the extension member 34 is sandwiched between the bracket 33 and the front end portion of the diagonal member 29. It is connected by a pivot 28.

The extension member 34 includes an arm portion 35 that extends in the extension direction beyond the pivot 28, and a protrusion 36 that is located on the opposite side and protrudes in a direction substantially perpendicular to the extension direction. The upper locking mechanism 31 is configured by the upper shaft member 37 provided on the arm portion 35. In the case of the illustrated embodiment, the upper shaft member 37 is fixed by welding or the like in a state where the upper shaft member 37 is fitted in the notch portion 38 of the arm portion 35, and is attached to the lower end of the circular shaft portion 37 a that protrudes perpendicularly to the arm portion 35. It is constituted by a pin provided with a head 39 having a large diameter. In addition, it is preferable that the head part 39 has a taper surface which becomes a diameter small toward the front-end | tip.

When the diagonal member 29 crosses the pair of diagonal members 29 and 29 by rotating through the pivot 28 from a state where the diagonal member 29 is hung from the end of the horizontal member 27, the arm portion of the extension 30 is provided. The upper shaft member 37 constituting the upper locking mechanism 31 is inserted into the wedge hole 25 of the upper flange 22a from the upper side to the lower side. At this time, as shown in FIG. 4, positioning means is configured to hold the predetermined standby posture by the protrusion 36 coming into contact with the peripheral edge of the flange 22 in a state where the diagonal member 29 is in the hanging posture. Therefore, if the diagonal member 29 is rotated from the positioned standby posture, the upper shaft member 37 is preferably inserted into the wedge hole 25, and the work is facilitated.

When the pair of diagonal members 29, 29 are rotated to cross each other, the respective arm portions 35, 35 are placed on the upper flanges 22 a, 22 a, and the upper shaft members 37 that constitute the upper locking mechanisms 31, 31, Since the shaft portions 37a of 37 are in contact with or close to the longitudinal ends of the respective wedge holes 25, the retaining portions 40 formed by the step portions of the shaft portions 37a and the head portions 39 are located below the wedge holes 25. The shaft portion 37a is locked in a retaining shape. In this state, the shaft portion 37 a having a circular cross section is pivotally attached to the wedge hole 25.

Therefore, the upper locking mechanisms 31 and 31 are locked to the upper flanges 22a and 22a and pivotally mounted on the upper flanges 22a and 22a by an almost one-touch operation that only rotates the diagonal members 29 and 29. In this state, the lower locking mechanisms 32 and 32 at the lower ends of the diagonal members 29 and 29 may be locked to the lower flanges 22b and 22b.

(Lower locking mechanism)
As shown in FIGS. 3 and 5, the lower locking mechanism 32 is positioned between the upper jaw portion 42 and the lower jaw portion 43 and the upper and lower jaw portions 42 and 43 by a bracket 41 fixed to the lower end portion of the diagonal member 29. Thus, a mouth portion 44 opening outward is formed. The upper jaw part 42 and the lower jaw part 43 are each secured to the upper cylinder part 45 and the lower cylinder part 46 that are arranged coaxially with each other by welding or the like, and the lower shaft member is directed from the upper cylinder part 45 toward the lower cylinder part 46. A spring 48 is provided to insert the spring 47 in a retractable manner and to elastically urge the lower shaft member 47 in the insertion direction. The lower shaft member 47 is configured such that a shaft portion 47 a having a circular cross section traverses the mouth portion 44 in a state where the tip end portion is inserted into the lower cylinder portion 46.

In the case of the illustrated embodiment, as shown in FIG. 5, the lower shaft member 47 is provided with a knob 50 such as a ring at the upper end portion 47 b inserted from the hole of the restriction plate 49 fixed to the top end of the upper tube portion 45. The stopper 50 prevents the lower shaft member 47 from moving downward when the knob 50 abuts against the restricting plate 49. The spring 48 is constituted by a coil spring that is externally inserted into the lower shaft member 47 inside the upper cylindrical portion 45, and normally urges the lower shaft member 47 in the downward movement direction, thereby lowering the lower end of the lower shaft member 47. When the knob 50 is lifted against the spring 48 by gripping the knob 50, the lower end of the lower shaft member 47 is retracted into the upper cylinder 45, and the mouth portion 50 is inserted. The part 44 is opened.

Accordingly, the lower locking mechanism 32 moves the diagonal member 29 in a state where the opening 44 is opened by lifting the lower shaft member 47, thereby inserting the lower flange 22 b into the opening 44. When the lower shaft member 47 is moved downward by the spring 48, the shaft portion 47a is inserted into the wedge hole 25 of the lower flange 22b, and the lower end portion is inserted into the lower cylinder portion 46, thereby being locked to the lower flange 22b. Is done. In this state, a shaft portion 47 a having a circular cross section is pivotally attached to the wedge hole 25.

(Upper shaft member and lower shaft member)
The upper locking mechanism 31 and the lower locking mechanism 32 configured as described above are locked to the upper flange 22a and the lower flange 22b, respectively, with respect to the vertical axis V as shown in FIGS. Thus, the upper shaft member 37 and the lower shaft member 47 are configured to be coaxially arranged.

When the handrail 26 is attached along the side of the scaffolding plate 24 on the spar side in the bent scaffold floor constructed along the curved outer wall surface of a building such as a columnar tower, as shown in FIG. The extension direction (the axis L of the horizontal member 27) and the directional line P2 in the longitudinal direction of the wedge hole 25 are displaced so that they are not parallel to each other, but the upper locking mechanism 31 and the lower locking mechanism 32 of the present invention. Is constituted by an upper shaft member 37 such as a pin and a lower shaft member 47, so that it can be suitably inserted and locked in the wedge holes 25, 25 of the upper flange 22a and the lower flange 22b.

Then, the upper shaft member 37 and the lower shaft member 47 are inserted and locked in the wedge holes 25 and 25 of the upper flange 22a and the lower flange 22b, as shown in FIG. With respect to the vertical axis V passing therethrough, the shaft portions 37a, 47a each having a circular cross section are rotatably mounted in the direction around the axis, so that the scaffolding structure is beaten by strong winds, etc. Even when the intersecting diagonal members 29, 29 are distorted, the upper shaft member 37 and the lower shaft member 47 can be freely rotated to absorb the distortion, thereby releasing the locking portion, Damage due to deformation or the like is preferably prevented.

(Another embodiment of the upper shaft member)
FIG. 8A shows a second embodiment of the upper locking mechanism 31. The upper shaft member 37 is formed of a pin made of a round bar and is folded at the tip of a shaft portion 37a having a circular cross section. A bent portion 39a is provided, and the bent portion 39a constitutes a retaining portion 40a that is locked to the lower edge of the wedge hole 25 of the upper flange 22a.

FIG. 8B shows a third embodiment of the upper locking mechanism 31. The upper shaft member 37 is constituted by a pin made of a round bar, and is hooked to the tip of the shaft portion 37b having a circular cross section. The plate 39b is fixed, and the hook plate 39b constitutes a retaining portion 40b that is engaged with the lower edge of the wedge hole 25 of the upper flange 22a.

Although FIG. 8A and FIG. 8B omit the lower locking mechanism 32, the lower locking mechanism 32 is not connected to the shaft portions 37 a and 37 b constituting the upper locking mechanism 31, respectively. It arrange | positions so that the axial part 47a may become coaxial. In addition, the basic configuration is the same as that of the above-described embodiment based on FIGS.

21 Strut 22 Flange 22a Upper flange 22b Lower flange 23 Horizontal member 24 Scaffold plate 25 Wedge hole 26 Handrail 27 Horizontal member 28 Axis 29 Diagonal member 30 Extension part 31 Upper locking mechanism 32 Lower locking mechanism 33 Bracket 34 Extension member 35 Arm portion 36 Projection portion 37 Upper shaft member 37a Shaft portion 38 Notch portion 39 Head portion 39a Bending portion 39b Hook plates 40, 40a, 40b Stopping portion 41 Bracket 42 Upper jaw portion 43 Lower jaw portion 44 Mouth portion 45 Upper tube portion 46 Lower cylinder part 47 Lower shaft member 47a Shaft part 47b Upper end part 48 Spring 49 Restriction plate 50 Knob piece

Claims (4)

A handrail provided along the side of the scaffolding plate erected on the column, and a horizontal member disposed between a pair of adjacent columns with respect to the column in which a flange having a wedge hole is vertically disposed, It is composed of a pair of diagonal members pivotally connected to both ends of the horizontal member via a pivot and crossed with each other below the horizontal member, and extends from the diagonal member beyond the pivot. In the configuration in which the upper locking mechanism provided in the extension portion is locked in the wedge hole of the upper flange, and the lower locking mechanism provided in the lower end portion of the diagonal member is locked in the wedge hole of the lower flange,
The upper locking mechanism (31) and the lower locking mechanism (32) are rotatable with respect to the wedge hole (25) of the upper flange (22a) and the wedge hole (25) of the lower flange (22b), respectively. A scaffolding handrail comprising an upper shaft member (37) and a lower shaft member (47) to be pivotally attached. The upper shaft member (37) and the lower shaft member (47) in the upper locking mechanism (31) and the lower locking mechanism (32) facing the same column are respectively connected to the wedge holes (25) of the upper flange (22a) facing each other. The scaffolding handrail according to claim 1, characterized in that they are arranged coaxially with each other with respect to the axis (V) passing through the wedge hole (25) of the lower flange (22b). The upper locking mechanism (31) is configured to rotate integrally with the extension of the diagonal member via the pivot when the pair of diagonal members intersect with each other below the horizontal member. The upper shaft member (37) inserted from the top to the bottom and pivotally supported in the wedge hole is configured,
The lower locking mechanism (32) is formed between the upper and lower jaws and the upper and lower jaws (42) and (43) facing the upper and lower surfaces of the lower flange when a pair of diagonal members are crossed below the horizontal member. The lower flange member is inserted into the other jaw portion in a state where the lower flange is inserted into the other jaw portion, and is constituted by a lower shaft member (47) rotatably supported in the wedge hole. The scaffolding handrail according to claim 1 or 2, characterized in that The lower locking mechanism (32) includes an upper cylinder member (45) and a lower cylinder member (46) arranged coaxially with each other on the upper jaw part (42) and the lower jaw part (43), respectively. The lower shaft member (47) is inserted into the other cylinder member so as to be able to advance and retract, and a spring (48) is provided for elastically urging the lower shaft member in the insertion direction. The handrail for scaffolding of 3.

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