JP3564398B2 - Safety handrail - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a construction work site, in which a scaffold plate is bridged between two cross members facing each other before and after a scaffolding construction frame including a pair of left and right vertical members and a cross member connecting the upper ends of the two vertical members, and The present invention relates to a safety handrail used when assembling a framework scaffold assembled by hanging a breath between materials.
[0002]
[Prior art and its problems]
The framed scaffold is a gate-shaped scaffolding frame composed of a pair of right and left vertical members and a horizontal member connecting the upper ends of the two vertical members facing each other at regular intervals in front and rear, and opposing each other. A breath is hung between both vertical members, and a scaffolding frame is extended upward while bridging the scaffold plate between the two horizontal members. After assembling the scaffolding boards between the horizontal members of the building frame, and adding the scaffolding frame to assemble the upper scaffold, install safety handrails prior to the assembling work and install the scaffolding work I am trying to be safe.
[0003]
[Problems to be solved by the invention]
Conventionally, a safety handrail framed in a required shape in advance is attached to a vertical member of the lower scaffolding frame by a pipe clamp or the like, and when the upper scaffold is assembled, the handrail is removed. They will be replaced with the vertical members of the scaffolding frame on the upper tier. However, in the conventional safety handrail, it is necessary to completely separate the safety handrail from the scaffolding frame every time the scaffold of each step is assembled, and the replacement work is extremely troublesome. In addition to lowering the work efficiency, there is a risk that the safety handrail may drop when the safety handrail is replaced.
[0004]
The present invention has been made in view of the above problems, and has as its object to provide a safety handrail that can easily and safely perform replacement work.
[0005]
[Means for Solving the Problems]
The safety handrail according to the first aspect of the present invention comprises a pair of left and right vertical members 1 and 1 and a horizontal member 2 connecting the upper ends of the two vertical members 1 and 1. A safety handrail T for use in assembling a framework scaffold which is assembled by bridging a scaffold plate 6 between cross members 2 and 2 and suspending breaths 5 and 5 between both longitudinal members 1 and 1. A handrail body 7 disposed between the opposed vertical members 1, 1 of the building frames 4, 4, and a vertical member 1, 1 of the scaffolding building frames 4, 4 provided at the center of the handrail body 7 in the width direction. The handrail main body temporary placing means 8 is detachable from the intersecting portion 5o of the braces 5, 5 suspended between them, and is attached to both side ends of the handrail main body 7, and is attached to the cross member 2 of the scaffolding frame 4. A locking hook 9 which can be freely engaged and disengaged, and guide means 10 provided on both side ends of the handrail body 7 for guiding the handrail body 7 along the vertical member 1 of the scaffolding frame 4; Characterized in that it comprises.
[0006]
According to a second aspect, in the safety handrail according to the first aspect, the handrail main body temporary placing means 8 is pivotally attached to a lower end portion of the handrail main body 7 and is locked at the intersection 5o of the breaths 5. A hook member 31 which is rotatable between a position where the hook member 31 is detached from the intersection and retracts to the outside so as not to interfere with the breath 5, and an operation in which a lower end portion is interlocked with the hook member 31 so as to be swingable up and down. The hook member 31 is locked in the locked position by holding the upper end of the operating member 32 on the upper side of the handrail body 7 in a state where the hook member 31 is in the locked position. By releasing the holding of the upper end portion of the operation member 32 and lifting the operation member 32, the locking member 8 is turned to the retracted position and the hook member 31 is unlocked.
[0007]
According to a third aspect of the present invention, in the safety handrail according to the first or second aspect, the guide means 10 protrudes brackets 39 at a plurality of upper and lower locations on the side end of the handrail body 7, and each bracket 39 includes A pair of inner and outer guide plates 41 and 42 are attached so as to sandwich the vertical member 1 of the frame 4 from both the inner and outer sides, and at least the inner guide plate 41 of the two guide plates 41 and 42 is the cross member 2 of the scaffolding frame 4. The guide plate 41 has a rotary vane-shaped guide plate so as to get over it, and a piece 40 is attached between the two guide plates 41 and 42 so as to be able to roll or slidably contact the side surface of the longitudinal member 1. .
[0008]
A fourth aspect of the present invention is the safety handrail according to the first or second aspect, wherein the handrail main body 7 is configured to be able to expand and contract in the width direction.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the safety handrail according to the present invention will be described below with reference to FIGS. FIG. 1 is a front view of a safety handrail T shown in a perspective view after FIG. 12, and a detailed structure of each part of the safety handrail T is shown in FIGS. 2 to 11.
[0010]
As shown in FIGS. 1 and 12 to 16, the safety handrail T includes a rectangular frame-shaped handrail main body 7 disposed between the opposed vertical members 1, 1 of the scaffolding frames 4, 4. It is provided at the center in the width direction of the handrail body 7 and is freely detachable from an intersection 5o of breaths 5, 5 which are hung in a cross-like manner between the vertical members 1, 1 of both scaffolding frames 4, 4. A handrail body temporary placing means 8, locking hooks 9 attached to both side ends of the handrail body 7 and detachable from the cross members 2 of the scaffolding frame 4, and both side ends of the handrail body 7 are provided respectively. Guide means 10 for guiding the handrail main body 7 along the vertical members 1 of the scaffolding frame 4. The handrail main body 7 is configured to be able to expand and contract in the width direction as described below. ing.
[0011]
As shown in FIG. 1, the handrail body 7 includes a pair of halves 12, 12 each having a vertical bar 12 a, a plurality of upper and lower horizontal bars 12 b, 12 c, 12 d, 12 e and a V-shaped reinforcing bar 12 f. Are connected to each other via connecting members 13, 14, 15 so as to be stretchable in the width direction of the handrail body. As shown in FIGS. 6 and 7, the connecting member 13 includes upper and lower connecting pipes 16 and 17 slidably fitted on the horizontal rails 12 b and 12 c of each half body 12, and a connecting rod 18 connecting these. It is formed in an H shape, and has a long hole 19 penetrating through both ends of each of the connection pipes 16 and 17, and a bolt penetrating from the long hole 19 to the end of each of the horizontal rails 12b and 12c. By using bolts and nuts 20 inserted and fastened to holes (not shown), the horizontal rails 12b, 12b and 12c, 12c of the two halves 12, 12 are elastically joined to each other. I have. FIG. 6A is a front view of a state where both halves 12, 12 are extended, FIG. 6B is a plan view, FIG. 6C is a perspective view, and FIG. FIGS. 12 (b) ′ are plan views, and FIG. 12 (c) ′ is a perspective view.
[0012]
As shown in FIG. 8, the connecting member 14 has both ends 14a, 14a having a U-shaped cross section and an intermediate portion having a substantially I-shaped cross section. The other half-shaped U-shaped part 14a is slidably fitted to the front end of the horizontal bar 12d of the other half body 12 while being fitted to the front end of the horizontal rail 12d of the half body 12 and fixed by welding or the like. By screwing a wing bolt 23 from the U-shaped portion 14a into the contraction screw hole 21 or the contraction screw hole 22 on the side of the horizontal rail 12d, the joint is extended and contracted. FIG. 8D is a perspective view showing a state where both halves 12, 12 are contracted, and FIG. 8D 'is a perspective view showing a state where both halves 12, 12 are extended.
[0013]
As shown in FIG. 9, the connecting member 15 is formed of a single circular tube, and both ends thereof are fitted to the horizontal bars 12 e, 12 e of the two halves 12, 12, and are similar to the connecting member 13. The bolts and nuts which are inserted and fastened through the long holes respectively provided at both ends of the connecting member 15 and the bolt holes (not shown) which are provided through the long holes at the ends of the horizontal bars 12e. 24, the horizontal rails 12e, 12e of the two halves 12, 12 are elastically joined to each other.
[0014]
The locking hooks 9 respectively attached to both side ends of the handrail body 7 are of a well-known structure, and as can be seen from FIGS. 1 to 3, can be detachably fitted to the cross member 2 of the scaffolding frame 4 from above. The hook body 9a and the hook body 9a are slidably mounted by pins P1 and P2 between a lock position for holding the cross member 2 together with the hook body 9a and an unlock position for releasing the cross member 2. The lock member 9b is always held at the lock position by its own weight. The hook body 9a of the locking hook 9 is fixed to a ring member 25 rotatably and axially slidably fitted to the vertical bar 12a forming each half body 12 of the handrail body 7. The ring member 25 is held non-rotatably by engaging the engagement recess 25a at the lower end thereof with the stopper pin 26 at the intermediate height position of the vertical rail 12a, and the fixing pin 27 which can be inserted and removed at that position. And is fixed by a fixing bolt 28.
[0015]
The fixing pin 27 is formed in a substantially L-shape with a thick wire, and at a position where the engaging concave portion 25a of the ring member 25 is engaged with the stopper pin 26, the distal end locking portion 27a is connected to the vertical bar 12a. Is urged by a spring 30 so that it can be locked in the locking hole 29. FIGS. 2A and 3A show a state in which the locking hook 9 is fixed at a position where it can be locked to the cross member 2 of the scaffolding frame 4. From this state, the fixing pin 27 is pulled out, the fixing bolt 28 is loosened, the ring member 25 is slid upward to disengage from the stopper pin 26, and then the ring member 25 is retracted to the handrail main body 7 side, for example. FIG. 3 (b) shows a state rotated by 90 °. At this time, the engaging hook 9 is held at the retracted position by engaging the engaging concave portion 25a of the ring member 25 with the distal end of the fixing pin 27 which is engaged with the engaging hole 29 of the vertical bar 12a. You.
[0016]
As shown in FIGS. 1, 7, and 9 to 11, the handrail main body temporary placing means 8 is pivotally connected to a connecting member 15 located at the lower end of the handrail main body 7 (see FIG. 9). Engagement positions (see FIG. 11 (a)) for interlocking with the intersections 5o (see FIG. 12) of the breaths 5, 5 suspended between the vertical members 1, 1 of the building frames 4, 4, and their intersections. A hook member 31 which is rotatable between a retracted position (see FIG. 11 (b)) which is detached from the portion 5o and retracted to the outside without interfering with the breathes 5, 5 and a lower end portion are interlocked and connected to the hook member 31. An operating member 32 that can swing up and down. The upper end of the operating member 32 is held on the upper side of the handrail body 7 in a state where the hook member 31 is in the locking position. The operation member 32 is locked in the locking position, and from this state, the holding of the upper end of the operation member 32 is released to release the operation member 32. By raising Chi, the hook member 31 pivots the locking member 8 to the retracted position it is adapted to be unlocked.
[0017]
The hook member 31 is formed in a substantially inverted L shape in a side view by a metal plate. One end (lower end) of the hook member 31 is pivotally connected to a bracket 33 protruding from the connection member 15 by a pivot 34. The other end (upper end) is pivotally attached to the lower end of the operation member 32. The operating member 32 is formed by forming a metal wire into a vertically elongated rectangular frame shape including both longitudinal members 32a, 32a, an upper transverse shaft member 32b, and a lower transverse shaft member 32c. 32c is pivotally attached to the upper end of the hook member 31, and the upper horizontal shaft member 32b is penetrated through both side plates 35a, 35a of the U-shaped bracket 35 fixed to the lower connecting pipe 16 of the connecting member 13 in plan view. It is slidably inserted into and supported by the arcuate guide groove G. As can be seen from FIG. 10, both upper and lower ends of both longitudinal members 32a, 32a are held by spacing members 36, respectively.
[0018]
FIGS. 10 (a) and 11 (a) are perspective views and side views showing the handrail main body temporary placing means 8 in a state where the hook member 31 is locked at the intersecting portion 5o of the breaths 5, 5 and is in the locked position. FIG. At this time, the operation member 32 is located inside the breaths 5 and 5 (inside of the scaffold), as can be seen from FIG. 11A, and the upper horizontal shaft member 32b is positioned inside the arc-shaped guide groove G. The hook member 31 is locked to the locked position by being locked to the end portion by the fixing pin 37, and this state is shown in detail in FIG. 7B.
[0019]
From the state in which the hook member 31 is locked at the locking position, the operation member 32 is lifted by grasping the spacing member 36 on the upper side and pushing it out of the breaths 5 and 5 (outside the scaffold). As a result, both longitudinal members 32a, 32a move outward and in parallel while moving upward, whereby the hook member 31 pivots outward about the pivot shaft 34 and moves from the intersection 5o of the breaths 5, 5. It detaches and retreats outside breaths 5 and 5. This state is shown in FIGS. 10 (b) and 11 (b). At this time, the upper horizontal shaft member 32b slides along the guide groove G and is locked at the outer end, and is fixed by the fixing pin 37, whereby the hook member 31 is locked at the retracted position. 7 (b) 'shows the details. Further, from the state where the hook member 31 is locked at the retracted position, the lock is released and the operating member 32 is pulled down to push the operating members 32 inward of the breaths 5 and 5 (inward of the scaffold). The members 32a, 32a move in parallel while moving down, so that the hook member 31 rotates inward about the pivot 34 to be locked at the intersection 5o of the breaths 5, 5. .
[0020]
A fixing pin 37 for fixing the upper horizontal shaft member 32b of the operation member 32 to the inner end or the outer end of the arc-shaped guide groove G to lock the hook member 31 at the locking position or the retracted position is shown in FIG. As shown, it is formed in a substantially L-shape with a thick wire, is rotatably penetrated and supported by the U-shaped bracket 35, and has a front end locking portion 37a at the inner end of the arc-shaped guide groove G. It is urged by a spring 38 so as to protrude into the part side engaging part g1 or the outer end part side engaging part g2. FIG. 7B shows the upper horizontal shaft member 32b of the operation member 32 locked at the inner end of the arc-shaped guide groove G, which protrudes into the inner end side engaging portion g1 of the guide groove G. This shows a state where the fixing pin 37 is fixed by the distal end locking portion 37a. When the upper horizontal shaft member 32b of the operation member 32 is fixed to the outer end of the guide groove G, the distal end locking portion 37a of the fixing pin 37 is pulled out from the engaging portion g1 of the guide groove G against the spring 38. Then, the fixing pin 37 may be rotated to cause the distal end locking portion 37a to protrude into the outer end side engaging portion g2 of the guide groove G, and this state is shown in FIG.
[0021]
The guide means 10 for guiding the handrail main body 7 along the vertical member 1 of the scaffolding frame 4 is a vertical rail which forms each half body 12 of the handrail main body 7 as can be seen from FIGS. Brackets 39 are protruded at two places, that is, a middle part and a lower end part in the height direction of 12a, and a pair of inner and outer rotating blades is provided on each bracket 39 so as to sandwich the vertical member 1 of the scaffolding frame 4 from both inside and outside. The guide plates 41 and 42 are rotatably mounted on a shaft 43, and a piece 40 rotatable along the side surface of the longitudinal member 1 is rotatably mounted between the guide plates 41 and 42 on a shaft 44. When the handrail main body 7 is slid between the opposing vertical members 1 of the scaffolding frames 4, the pair of inner and outer rotating blade-shaped guide plates 41 and 42 is engaged with the vertical member 1. While sliding in the state, the piece piece 40 rolls on the It has become the body 7 to guide.
[0022]
In this case, the inner guide plate 41 of the inner and outer rotating vane-shaped guide plates 41 and 42 hits the horizontal member 2 (located inside the vertical member 1) of the scaffolding frame 4 during sliding of the handrail body 7. Since it rotates, it can slide along the vertical member 1 without being disturbed by the horizontal member 2. Since the outer guide plate 42 does not hit the cross member 2 during the sliding of the handrail main body 7, it does not have to be formed in the shape of a rotating blade.
[0023]
Next, an assembling method for assembling a framework scaffold using the safety handrail T configured as described above will be described with reference to FIGS. 12 to 16 and other drawings as appropriate.
[0024]
First, as shown in FIG. 12, a pair of scaffolding frames 4, 4 are arranged in front and rear facing each other, and breaths 5, 5 are hung between opposed vertical members 1, 1 of both scaffolding frames 4, 4. The first-stage scaffold is assembled by extending the scaffold plate 6 between the two cross members 2 and 2, and the safety handrail T according to the present invention is installed on this scaffold prior to the assembly of the second-stage scaffold. .
[0025]
That is, when installing the safety handrail T, as shown in FIGS. 6 to 9, the bolts / nuts 20, the wing bolts 23 and the bolts / nuts 24 of the connecting members 13, 14 and 15 are respectively loosened, and the handrails are set. With the two halves 12, 12 forming the main body 7 slightly reduced, the handrail main body 7 is inserted between the opposing vertical members 1, 1 of the scaffolding frame 4, and each guide means 10 is connected to the vertical member. 1 and the hook member 31 of the handrail main body temporary placing means 8 is locked to the intersection 5o of the breaths 5 and 5 of the first stage scaffold by the operating member 32, and the handrail body 7 is connected to the intersection 5o. Each locking hook 9 is further locked to the cross member 2 of each scaffolding frame 4 (see FIG. 11 (a)), and then the two halves 12, 12 are extended to connect the connecting members 13, 14, 15 bolts and nuts 20, wing bolts 23 and bolts and nuts 2 4 is appropriately tightened, and thus the safety handrail T is installed on the first-stage scaffold as shown in FIG. 12 prior to assembling the second-stage scaffold. When the safety handrail T is installed, the width of the handrail body 7 is appropriately reduced as described above, so that the work of inserting the handrail body 7 between the vertical members 1 and 1 becomes easy. The same applies when the handrail body 7 is removed.
[0026]
Note that FIG. 12 shows a state in which the safety handrail T is installed only on the front side of the first-stage scaffold due to the complexity of the display of the drawing. Installed in This also applies to FIGS. 13 to 16 described below.
[0027]
By installing the safety handrail T as shown in FIG. 12 on the first-stage (lowest-stage) scaffold as described above, the assembling work of the second-stage scaffold, that is, 2 Work to add the scaffolding frame 4 of the step, work to put the breaths 5 and 5 between the vertical members 1 and 1 of the added scaffolding frame 4, and scaffold plate between the horizontal members 2 and 2 6 can be safely carried out. FIG. 13 shows a state where the assembling work of the second-stage scaffold is completed.
[0028]
When the assembling work of the second-stage scaffold is completed, the fixing pin 27 fixing the locking hook 9 in the state shown in FIG. 3A is pulled out, the fixing bolt 28 is loosened, and the ring member 25 is moved upward. After sliding to disengage from the stopper pin 26, the ring member 25 is rotated so as to retract to the handrail main body 7, and the locking hook 9 is brought into the state shown in FIG. 3 (b). As can be seen, the holding pin 37 of the handrail main body temporary placing means 8 is pulled out to release the holding of the upper end of the operation member 32, and the hook member 31 is detached from the intersection 5o of the breaths 5, 5 by the operation member 32. Then, the handrail main body temporary placing means 8 is brought into a state shown in FIGS. 10B and 11B.
[0029]
In such a state, the handrail main body 7 is guided upward along the vertical members 1, 1 of the two scaffolding building frames 4, 4 by the guide means 10, and is lifted upward as shown in FIGS. The hook member 31 of the main body temporary placing means 8 is locked at the intersection 5o of the breaths 5 and 5 of the second stage scaffold, the handrail main body 7 is joined to the intersection 5o, and each locking hook 9 is used for the second stage scaffold. It is locked to the cross member 2 of the building frame 4 to be in a state as shown in FIG. When the handrail body 7 is pulled up from the lower scaffold to the upper scaffold, both ends of the handrail body 7 are held by the vertical members 1,1 of the scaffolding frames 4,4 by the guide means 10. , The lifting operation of the handrail main body 7 can be performed smoothly and stably. After the safety handrail T is installed on the second-stage scaffold prior to assembling the third-stage scaffold as described above, the assembling work of the third-stage scaffold is performed. Thereafter, the same operations as those described above are repeated, and the scaffolds are sequentially assembled in a multi-stage manner while installing the safety handrail T on the lower scaffold prior to assembling the upper scaffold for each stage.
[0030]
As can be understood from the above description, prior to assembling the upper stage scaffold, if the scaffold is gradually assembled to the upper stage while the safety handrail T is installed on the lower stage scaffold, the assembling work of each stage is completed, and the upper stage It is not necessary to remove the safety handrail T from the scaffolding frame 4 when performing the replacement work of the scaffolding safety handrail T, and it is necessary to guide the safety handrail T along the vertical members 1, 1 of the scaffolding frame 4, 4. Since it is only necessary to raise the handrail by length, the work of replacing the safety handrail T can be performed easily, and there is no possibility that the safety handrail T is dropped by mistake, and the safety of the work can be secured.
[0031]
【The invention's effect】
The safety handrail according to the first aspect of the present invention is a handrail main body disposed between opposed vertical members of both scaffolding building frames, and a vertical member of both scaffolding building frames provided at the center in the width direction of the handrail main body. A handrail main body temporary placing means which can be disengaged with respect to the crossing portion of the breath suspended between them, and a locking hook which is attached to both end portions of the handrail main body and which can be disengaged from the cross member of the scaffolding frame; , Which are provided at both ends of the handrail body and guide means for guiding the handrail body along the vertical members of the scaffolding frame, and installing safety handrails on the lower scaffold prior to assembling the upper scaffold. By assembling the scaffolding, it is not necessary to remove the safety handrails from the scaffolding frame when replacing the safety handrails from the lower scaffold to the upper scaffold. Raise the required length while guiding along the vertical members of the building frame Since it is only, with allows the replacement work easier, there is no fear of dropping accidentally safety handrail, can ensure the safety of the work.
[0032]
When the handrail main body temporary placing means of the safety handrail is configured as described in claim 2, when the handrail main body is pulled up from the lower side to the upper side, the handrail main body temporary placing means is not caught by the breath, and the safety is improved. The installation work of the handrail, that is, the replacement work, can be performed quickly and easily.
[0033]
Further, if the guide means for the safety handrail is configured as described in claim 3, when the handrail body is pulled up from the lower side to the upper side, a part of the guide means is used as a cross member of the scaffolding frame. The handrail body can be smoothly slid upward in a stable state without being caught on the handrail.
[0034]
If the handrail main body is configured to be expandable and contractible in the width direction as described in claim 4, the insertion work when the handrail main body is first inserted between the opposed vertical members of the scaffolding frame is facilitated, and When the handrail main body is removed from between the vertical members after the assembly of the handrail, the removal becomes easy.
[Brief description of the drawings]
FIG. 1 is a front view of a safety handrail according to the present invention.
2A is an enlarged view of a portion indicated by an arrow A in FIG. 1, FIG. 2B is a plan view thereof, and FIG. 2C is a right side view.
3A is a perspective view of a portion shown in FIG. 2A, wherein FIG. 3A shows a state in which a locking hook is in a use position, and FIG. 3B shows a state in which the locking hook is retracted to a non-use position. Is shown.
4A is an enlarged view of a part indicated by an arrow B in FIG. 1, FIG. 4B is a plan view thereof, and FIG. 4C is a left side view.
FIG. 5 is a perspective view of the guide means shown in FIG.
FIG. 6 is an enlarged view of a portion indicated by an arrow C in FIG. 1, (a) is a front view in a state where both halves are extended, (b) is a plan view, (c) is a perspective view, (A) 'is a front view in a state where both halves are contracted, (b)' is a plan view, and (c) 'is a perspective view.
FIGS. 7A and 7B are enlarged views of a portion indicated by an arrow D in FIG. 1, wherein FIG. 7A is a front view, and FIG. 7B is an upper horizontal axis of an operation member locked to an inner end of an arc-shaped guide groove; FIG. 4B shows a state in which the material is fixed with a fixing pin, and FIG. 6B shows a state in which the upper horizontal shaft material is fixed to the outer end of the arc-shaped guide groove with the fixing pin.
8 is an enlarged view of a portion indicated by an arrow E in FIG. 1, (a) is a front view, (b) is a plan view, (c) is a right side view, and (d) is a contraction of both halves. (D) 'is a perspective view in a state where both halves are extended.
FIGS. 9A and 9B are enlarged views of a portion indicated by an arrow F in FIG. 1, wherein FIG. 9A is a front view, FIG. 9B is a state in which a hook member is in a locking position, and FIG. This shows a state where the vehicle is retracted from the stop position to the evacuation position.
FIGS. 10A and 10B are perspective views showing the handrail main body temporary placing means, wherein FIG. 10A shows a state in which the hook member is at a locking position, and FIG. 10B shows a state in which the hook member is at a retracted position.
11A and 11B are side views showing the handrail main body temporary placing means, in which FIG. 11A shows a state in which the hook member is at a locking position, and FIG. 11B shows a state in which the hook member is at a retracted position.
FIG. 12 is a perspective view showing a state in which a safety handrail is installed on a first-stage scaffold.
FIG. 13 is a perspective view showing a state where the second-stage scaffold is assembled with the safety handrail installed.
FIG. 14 is a perspective view showing a state in which the safety handrail is pulled up to the second stage scaffold.
FIG. 15 is a perspective view showing a state in which the safety handrail has been pulled up to the second stage scaffold side.
FIG. 16 is a perspective view showing a state in which the safety handrail that has been pulled up to the second stage scaffold is fixed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vertical member of scaffolding frame 2 Cross member of scaffolding frame 4 Scaffolding frame 5 Breath 5 o Intersection of breath 6 Scaffolding plate 7 Handrail body 8 Handrail body temporary placement means 9 Locking hook 12 Half of handrail body Body 10 Guide means 31 Hook member 32 Operating member 40 Piece 41, 42 Guide plate

Claims (4)

A scaffold plate is bridged between the two cross members facing each other in front and behind the scaffolding frame consisting of a pair of left and right vertical members and a cross member connecting the upper ends of the two vertical members, and a breath is hung between the two vertical members. It is a safety handrail used for assembling the frame scaffold to be assembled,
At the intersection of the handrail body located between the opposed vertical members of both scaffolding frames and the breath provided at the center in the width direction of the handrail body and suspended between the vertical members of both scaffolding frames On the other hand, a handrail body temporary placing means that can be disengaged and detachably attached to both side ends of the handrail body, a locking hook that can be disengaged with respect to the horizontal member of the scaffolding frame, and provided on both side ends of the handrail body, Guide means for guiding the handrail body along the vertical members of the scaffolding frame; The handrail main body temporary placing means is pivotally attached to the lower end of the handrail main body, and is between a locking position for locking at an intersection of the breath and a retreating position for detaching from the intersection and retracting outward without interfering with the breath. A hook member rotatable at its lower end and an operating member whose lower end is interlockingly connected to the hook member and which can swing up and down. The upper end of the operating member is held by the handrail body when the hook member is in the locked position. The hook member is locked at the locking position by holding the hook member at the upper side, and the holding member is rotated from the retracted position to the retracted position by releasing the holding of the upper end of the operating member and lifting the operating member from this state. 2. The safety handrail according to claim 1, wherein the member is unlocked. The guide means, projecting brackets at a plurality of upper and lower locations of the side end portion of the handrail body, attaching a pair of inner and outer guide plates to each bracket, sandwiching the vertical member of the scaffolding building frame from both inside and outside, Of the two guide plates, at least the inner guide plate is a rotating blade-shaped guide plate so as to pass over the cross member of the scaffolding frame, and a piece of a piece that can be in rolling contact or sliding contact with the side surface of the vertical member between the two guide plates. The safety handrail according to claim 1 or 2, wherein the handrail is attached. The safety handrail according to claim 1 or 2, wherein the handrail main body is configured to be able to expand and contract in the width direction.

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