JP3564404B2 - 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 for assembling a framework scaffold assembled between members.
[0002]
[Prior art]
In general, framed scaffolds are composed of a pair of left and right vertical members and a gate-shaped scaffolding frame consisting of a horizontal member connecting the upper ends of the two vertical members facing each other at regular intervals in front and rear. A breath is hung between the opposite vertical members, and a scaffolding frame is extended upward while a scaffold plate is bridged between the two horizontal members. After spanning the scaffolding plates between the cross members of the side scaffolding frame, when assembling the scaffolding frame and assembling the upper scaffold, install safety railing for work prior to the assembling work, The safety of assembly work is aimed at.
[0003]
[Problems to be solved by the invention]
A conventional safety handrail is configured by arranging a plurality of middle rails in a grid on an outer peripheral frame formed by a pair of upper and lower horizontal rails and a pair of vertical rails on both sides. The safety railing is attached to the vertical member of the frame with a pipe clamp.When attaching this safety handrail, the breath is hung slightly inward between the opposite vertical members of both scaffolding building frames, and the inside of the breath Since the safety handrail cannot be attached to the scaffolding frame, the safety handrail is attached to the scaffolding frame from the outside of the breath. However, the work of attaching the safety handrail from the outside of the breath is difficult because the breath is an obstacle, and there is a risk that the handrail body may drop during the work.
[0004]
In view of the above problems, the present invention makes it easy to move the handrail body from the inside of the breath to the scaffolding building frame without being interfered by the breath hung between the opposed vertical members of both scaffolding building frames. It is another object of the present invention to provide a safety handrail that can be securely attached.
[0005]
[Means for Solving the Problems]
The safety handrail according to the first aspect of the present invention is a pair of left and right vertical members 1 and 1 and a horizontal member 2 connecting the upper ends of the vertical members 1 and 1, and the opposing horizontal members of the scaffolding building frames 4 and 4. A safety handrail T used for assembling a scaffold that is assembled by bridging a scaffold plate 6 between two and two and suspending a breath 5 and five between two vertical members 1 and 1, and a construction frame for both scaffolds The handrail main body 7 is disposed between the opposed vertical members 1, 4, and the lower end of the handrail body 7 is connected to the breaths 5, 5 suspended between the vertical members 1, 1. Is also formed so as to protrude inside the scaffolding frame 4, and clamps 8 which can be fixed to the vertical members 1 of the scaffolding frame 4 are attached to both side ends of the inner protruding portion. In addition, a locking hook 9 that can be engaged and disengaged from above is attached to the cross member 2 of the scaffolding frame 4.
[0006]
A second aspect of the present invention provides the safety handrail according to the first aspect, wherein the handrail main body 7 is formed in a lattice frame shape, and the outer peripheral frame 10 is formed by at least the upper horizontal rail 11 and the vertical rails 13, 13. It is characterized in that the lower end of each vertical bar 13 is bent inward of the scaffolding frame 4 to form an inner protruding portion 13a that protrudes more inside the scaffolding frame 4 than the breaths 5 and 5. I do.
[0007]
A third aspect of the present invention is the safety handrail according to the first or second aspect, wherein a plurality of the locking hooks 9 are attached to each of the vertical rails 13 of the handrail body outer peripheral frame 10 at an interval vertically. And
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a safety handrail according to the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing a state where a safety handrail T according to the present invention is installed on, for example, a second-stage framework scaffold, FIG. 2 is an enlarged perspective view showing the safety handrail T, FIG. 4 is a plan view of the safety handrail T, and FIG. 5 is a left side view of the safety handrail T shown in FIG. 6A is an enlarged front view of a portion indicated by an arrow A in FIG. 3, FIG. 6B is a plan view, FIG. 6C is a left side view, and FIG. 3 is an enlarged front view of a portion indicated by an arrow B in FIG. 3, FIG. 3B is a plan view, and FIG. 3C is a left side view.
[0009]
As can be seen from FIGS. 1 and 2, the safety handrail T includes a grid-frame-shaped handrail body 7 disposed between the opposed vertical members 1, 1 of the scaffolding building frames 4, 4, and the handrail body. It comprises a clamp 8 and a locking hook 9 for attaching 7 to the vertical member 1 and the horizontal member 2 of the scaffolding frame 4. The handrail main body 7 is formed into a lattice frame by integrally integrating vertical and horizontal middle rails 14, 15, 15 into an outer peripheral frame 10 formed by an upper horizontal rail 11, a lower horizontal rail 12, and a pair of vertical rails 13, 13 on both sides. It was formed.
[0010]
The lower ends of the vertical bars 13 forming the outer peripheral frame 10 of the handrail body 7 are not interfered by the breaths 5, 5 hung between the opposed vertical members 1, 1 of the scaffolding frames 4, 4. Is formed so as to be bent inward of the framework scaffold and protrude inward from the breath 5 (see FIG. 5), the bent portion is denoted by 13o, and the inner protruding portion below the bent portion 13o is denoted by 13a. Indicated by Then, a clamp 8 that can be fixed to the vertical member 1 of the scaffolding frame 4 is attached to the inner protruding portion 13a at the lower end of each vertical bar 13 and the scaffolding frame 4 is fixed above the inner protruding portion 13a. A locking hook 9 that can be engaged and disengaged from above is attached to the cross member 2. Note that the lower horizontal rail 12 of the handrail body 7 is bridged between the lower ends of the projecting portions 13a, 13a of the inner sides of both vertical rails 13, 13.
[0011]
As can be seen from FIGS. 1 and 5, the braces 5, 5 hung between the opposing vertical members 1, 1 of the scaffolding frames 4, 4 are among the vertical members 1 of the scaffolding frame 4. Since a pin hole (not shown) at the end of the breath is inserted into the locking pin 16 projecting from the side surface and locked, the breath 5 is formed from the vertical member 1 of the scaffolding frame 4. As shown in FIG. 5, the handrail main body 7 located inside and between the vertical members 1, 1 of the scaffolding frames 4, 4 has only the inner protruding portion 13a at the lower end thereof as compared with the breaths 5, 5. Is located on the inner side, and the vertical bar portion above the inner projecting portion 13a is in a state of being fitted between the vertical members 1, 1 of the scaffolding frames 4, 4.
[0012]
The clamp 8 for attaching the handrail body 7 to the vertical member 1 of the scaffolding frame 4 is formed of a known pipe clamp, as shown in FIGS. 6 (a) to 6 (c) and FIG. 10 (a). Then, a U-shaped mounting bracket 19 connected to the clamp body 17 via a connecting member 18 is attached and fixed to the inner protruding portion 13a of the lower end of the vertical bar 13 of the handrail main body outer peripheral frame 10 by a guide bolt 20 and a lock bolt 21. Then, the vertical member 1 of the scaffolding frame 4 is held by the clamp body 17 and the clamp arm 22 pivotally connected to the clamp body 17 and fixed by swingable tightening bolts 23. I have. The guide bolt 20 is a bolt that penetrates the inner projecting portion 13a of the vertical bar 13 in the diameter direction and is inserted into the guide hole (elongated hole) 19a of the mounting bracket 19, and is shown in FIGS. 6 (a) and 6 (c). The mounting position of the mounting bracket 19 can be adjusted between the position indicated by the solid line and the position indicated by the imaginary line. Further, the lock bolt 21 is used to fasten and fix the mounting bracket 19 at a required position of the inner protruding portion 13a.
[0013]
As can be seen from FIGS. 2 and 7A to 7C, the locking hook 9 that is removably locked from above to the cross member 2 of the scaffolding frame 4 is at the lower end of the vertical bar 13. The upper part is provided above and below the bent portion 13o in the upper part and the lower part in two stages, so that two types of handrail heights can be selected. That is, when the lower hook 9 is locked to the cross member 2 of the scaffolding frame 4, the handrail height is higher than when the upper hook 9 is locked to the cross member 2. . In this embodiment, the locking hooks 9 are provided in two upper and lower stages, but may be provided in three or more stages.
[0014]
A method of using the safety handrail T configured as described above will be described. First, as shown in FIG. 1, a pair of scaffolding frames 4 are arranged to face each other, and both scaffolding frames 4 are formed. The first stage scaffold is assembled by suspending the breaths 5 and 5 between the opposed vertical members 1 and 1 and bridging the scaffold plate 6 between the two horizontal members 2 and 2. Assemble the second stage scaffold in a similar manner. The locking hooks 9 attached to the lower ends of the vertical rails 13, 13 of the handrail body 7 are attached to the opposite cross members 2, 2 of the scaffolding frames 4, 4 of the second stage scaffold. 9 and the clamps 8, 8 attached to the inner projecting portions 13a, 13a below the hooks 9 are fixed to the upper ends of the longitudinal members 1, 1 as shown in FIG. At the upper end of the scaffold, a safety handrail T for assembling the third scaffold is installed. Note that FIG. 1 shows a state in which the safety handrail T is installed only on the front side of the scaffold due to the complicated display of the drawing, but actually, the safety handrail T is similarly installed on the back side of the scaffold. . Further, in this embodiment, the safety handrail T is installed from the second-stage scaffold, but may be installed from the first-stage scaffold.
[0015]
When the safety handrail T is installed, the clamps 8, 8 attached to the lower ends on both sides of the handrail body 7 are fixed to the upper end side of the longitudinal members 1, 1, but in the conventional safety handrail T, the breaths 5, 5 are attached. In the safety handrail T, the lower end of each of the vertical bars 13 forming the outer frame 10 of the handrail main body 7 has the lower end of the breath 5, 5 is bent inward of the framework scaffold so as not to be interfered with 5 so as to form an inner protruding portion 13a protruding inward from the brace 5 and 5, so that the handrail main body 7 is disposed inside the brace 5 and 5; By the work from the inside of the breaths 5, 5, the locking hooks 9, 9 can be locked to the horizontal members 2, 2 of the scaffolding frames 4, 4, and the clamps 8, 8 are fixed to the vertical members 1, 1. can do.
[0016]
In this way, the work of attaching the safety handrail T can be performed from the inside of the breaths 5, 5 hung between the vertical members 1, 1 of the scaffolding frames 4, 4. The risk of dropping the main body 7 is small, and work safety can be improved. According to the safety handrail T, the clamps 8, 8 attached to the inner protruding portion 13a at the lower end of the handrail main body 7 are fixed to the vertical members 1, 1 of the scaffolding frames 4, 4, and the inner protruding portion 13a is provided. The hooks 9, 9 attached to the upper part of the scaffold are locked to the cross members 2, 2 of the scaffolding frames 4, 4, so that the handrail body 7 is in a stable state with respect to the scaffolding frames 4, 4. And the locking hook 9 only needs to be locked from above to the cross member 2, so that the mounting operation can be performed quickly and easily.
[0017]
By installing the safety rail T for assembling the third-stage scaffold at the upper end of the second-stage scaffold as described above, the assembling work of the third-stage scaffold, that is, the third-stage scaffolding frame 4 has three steps. Work of adding the scaffolding frame 4 of the eye, work of hanging the breaths 5, 5 between the vertical members 1, 1 of the added scaffolding frames 4, 4, and scaffolding plate between the horizontal members 2, 2. 6 can be safely carried out. When the assembling work of the third-stage scaffold is completed in this manner, each clamp 8 is released and removed from the vertical member 1 of the scaffolding frame 4, and each locking hook 9 is detached from the horizontal member 2. The safety handrail T is removed from the step scaffold, and the removed safety handrail T is installed in the same manner as described above on the upper end of the third step scaffold for assembling the fourth step scaffold. Thereafter, the assembling work of the fourth-stage scaffold is performed, and thereafter, the same operation is repeated, and the safety handrail T is installed at the upper end of the lower-stage scaffold prior to the assembling of the upper-stage scaffold. To assemble.
[0018]
In the use of the safety handrail T, even when the safety handrail T is detached from the scaffold, the safety handrail T is removed from the inside of the breaths 5, 5 hung between the vertical members 1, 1 of the scaffolding frames 4, 4. Since the work can be performed, the removal work can be easily performed, and the removal work can be performed safely.
[0019]
In the embodiment described above, the handrail main body 7 of the safety handrail T is formed in a lattice frame shape, that is, the outer rail 10 formed by the upper horizontal rail 11, the lower horizontal rail 12, and the pair of vertical rails 13, 13 is vertically and horizontally aligned. Of the handrail main body 7 by bending the lower ends of the vertical bars 13 of the outer peripheral frame 10 into the inside of the scaffolding frame 4 by integrally incorporating the middle rails 14, 15, 15 into a lattice frame shape. Although the inner protruding portion 13a is formed at the lower end, the handrail body 7 is formed in a plate shape, the lower end protrudes inward to form an inner protruding portion, and the clamps 8, 8 are attached to both ends thereof. It may be. However, when the handrail main body 7 is configured as described above as in this embodiment, the handrail can be manufactured at a low cost while having a very simple structure and sufficient strength.
[0020]
【The invention's effect】
In the safety handrail according to the first aspect of the present invention, the lower end of the handrail main body is formed so as to protrude more inside the scaffolding construction frame than the brace hung between the vertical members between the two scaffolding construction frames. A clamp that can be fixed to the vertical member of the building frame for scaffolding is attached to both side ends of the inner protruding part, and a locking hook is attached to the upper part of this protruding part.When installing this safety handrail, To fix the clamp to the upper end of the vertical member, since the mounting part of the clamp does not interfere with the breath, it is possible to arrange the handrail body inside the breath and perform the work of attaching the handrail body from inside the breath. it can. That is, the locking member can be locked to the horizontal member of the scaffolding frame, and the clamp can be attached and fixed to the vertical member.
[0021]
In this way, since the work of attaching the safety handrail can be performed from the inside of the breath hung between the vertical members of the scaffolding frame, the work is easy, and there is little danger of dropping the handrail body during the work, Work safety can be improved. According to this safety handrail, in addition to the clamp, the locking hook attached to the upper portion of the locking hook mounting portion is used to fix the handrail body to the scaffolding frame. Since the handrails are locked, the handrail main body can be installed in a stable state with respect to the scaffolding frame, and the locking hooks need only be locked from above to the cross members, so that the installation work of the safety handrails is quickly and easily performed. It can be carried out.
[0022]
In addition, not only when installing the safety handrail as described above, but also when removing the handrail body from the scaffolding frame, the work can be removed from the inside of the breath hung between the vertical members of the scaffolding frame. , It is easy to remove and can be performed safely.
[0023]
As described in claim 2, the handrail body is formed in a lattice frame shape, and its outer peripheral frame is formed by at least the upper horizontal rail and both vertical rails, and the lower end of each vertical rail is inside the scaffolding frame. If it is bent to form an inner protruding portion at the lower end of the handrail body, it can be manufactured at a low cost while having a very simple structure and sufficient strength.
[0024]
As described in claim 3, the height of the installed safety handrail can be selected by attaching a plurality of locking hooks attached to each vertical rail of the handrail outer peripheral frame at intervals vertically. Become.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a safety handrail according to the present invention is installed.
FIG. 2 is an enlarged perspective view of the safety handrail according to the first embodiment.
FIG. 3 is a front view of the safety handrail according to the first embodiment;
FIG. 4 is a plan view of the safety handrail according to the first embodiment;
FIG. 5 is a left side view of the safety handrail shown in FIG. 3;
6A is an enlarged front view of a portion indicated by an arrow A in FIG. 3, FIG. 6B is a plan view, and FIG. 6C is a left side view.
7A is an enlarged front view of a portion indicated by an arrow B in FIG. 3, FIG. 7B is a plan view, and FIG. 7C is a left side view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vertical member of scaffolding frame 2 Cross member of scaffolding frame 4 Scaffolding frame 5 Breath 6 Scaffolding board T Safety handrail 7 Handrail body 8 Clamp 9 Locking hook 10 Peripheral frame of handrail body 13 Vertical beam of outer frame 13a Projection inside the lower end of the vertical bar

Claims (3)

The scaffolding frame is composed of a pair of left and right vertical members and a horizontal member connecting the upper ends of the two vertical members. A safety handrail used for assembling a framework scaffold,
It is composed of a handrail main body disposed between the opposed vertical members of both scaffolding frames, and the lower end of the handrail main body protrudes more inside the scaffolding frame than the breath suspended between the two vertical members. A clamp that can be fixed to the vertical member of the scaffolding frame is attached to both side ends of the inner projecting portion, and a clamp is attached to the upper portion of the clamp mounting portion from above to the cross member of the scaffolding frame. Safety handrail with removable locking hook attached. The handrail body is formed in a lattice frame shape, and its outer peripheral frame is formed by at least the upper horizontal rail and both vertical rails, and the lower end of each vertical rail is bent inward of the scaffolding building frame, from the breath. The safety handrail according to claim 1, further comprising an inner protruding portion protruding inside the scaffolding frame. The safety handrail according to claim 1 or 2, wherein a plurality of the locking hooks are attached to each of the vertical rails of the handrail body outer peripheral frame at an interval vertically.

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