JP3004943B2 - Auxiliary handrail for crossing stairs of framework scaffold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary handrail which is horizontally laid over a cross bracing made of a pair of diagonal members stretched between vertical frames of a framed scaffold.

[0002]

2. Description of the Related Art As shown in FIG. 6, a frame scaffold installed on a construction site comprises a pair of diagonal members 2a, 2a between vertical frames 1, 1 along both longitudinal sides of a scaffold plate 3. X
Since the cross braces 2 are bridged, the cross braces 2 serve as safety fences, and the safety of the worker crossing the scaffold plate 3 can be improved. However, such crossing 2 is
As can be seen from the figure, since the lower side is opened in a triangular shape with the scaffold plate 3, when the worker is working on the scaffold plate 3 while working in a middle position, There was a risk of accidentally falling from the triangular opening.
In order to prevent such danger, auxiliary handrails 4 are attached to the diagonal members 2a, 2a forming the lower triangular openings of the cross braces 2.
Is hung horizontally.

[0003]

However, the conventional auxiliary handrail has a problem in that the structure of the part to be mounted at the crossing line is complicated, and the mounting operation is troublesome. Therefore, an object of the present invention is to provide an auxiliary handrail which can be attached with a simple structure and one-touch at a crossing line.

[0004]

The invention according to claim 1 is
A pair of diagonal members 2a stretched between the vertical frames 1 and 1 of the framework scaffold;
In an auxiliary handrail which is horizontally hung over the cross bracing 2 consisting of 2a, a pair of bar bodies 10a, 10b is composed of a bar-shaped handrail main body 10 connected to bendable by a joint 13, and each bar body 10a, At the outer end of 10b, a substantially downward U-shaped first hook 11 which is hooked on the upper side surface of the diagonal member 2a, and the first hook 11 is located closer to the outer end of the rod than the first hook 11, A substantially upward U-shaped second hook 12 that is hung on the lower surface of the diagonal member 2a is provided,
Each rod 1 is located between the first hook 11 and the second hook 12.
A fitting opening 14 is formed in which both hooks 11 and 12 can be fitted into the diagonal member 2a at the same time in a state where 0a and 10b are positioned parallel to the diagonal member 2a.

[0005] A second aspect of the present invention relates to the auxiliary handrail for cross bracing of a scaffold according to the first aspect.
However, it is characterized in that both rods 10a and 10b are refracted only upward from a horizontal posture.

According to a third aspect of the present invention, in the auxiliary handrail for intersecting braces of the frame scaffold according to the first or second aspect, the joint 13 is provided with a locking means 18 for fixing the both rods 10a and 10b in a horizontal posture. It is characterized by being provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 (A) shows the whole of a handrail 4 for cross-crossing ablation according to the present invention, and FIG.
FIG. 2A shows a state in which the auxiliary handrail 4 is folded, and FIGS. 2A and 2B and FIGS. 3A to 3C show a detailed structure of each part of the auxiliary handrail 4. 4 and 5
Indicates a use state of the auxiliary handrail 4. As shown in FIG. 1A, the auxiliary handrail 4 is composed of a bar-shaped handrail main body 10 in which a pair of rods 10a and 10b having substantially the same length are connected to bendable by a joint 13.
As shown in FIGS. 4 and 6, the cross braces 2 to which the auxiliary handrails 4 are attached include a pair of diagonal members 2 intersecting in an X shape.
a, 2a, and both ends of each diagonal member 2a are pivotally attached to the vertical frame 1 of the framework scaffold.

As can be seen with reference to FIGS. 2 (A), 2 (B) and FIG. 5, a cross bracing 2 is formed at the outer end of each bar 10a, 10b forming the bar-shaped handrail body 10. A substantially downward U-shaped first hook 11 to be hooked on the upper surface of the oblique member 2a to be formed, and a lower surface of the oblique member 2a located closer to the outer end of the rod than the first hook 11 is. A substantially upward U-shaped second hook 12 hooked to the portion is integrally protruded, and between the first hook 11 and the second hook 12, each of the rods 10a and 10b is connected to the diagonal member. 2a, the hooks 11 and 12 are simultaneously placed in parallel with the diagonal member 2a.
The fitting opening 14 is formed so as to be able to be fitted into a.

The hooks 11 and 12 are formed by, for example, pressing a bar made of steel, and have respective rods 10a and 10b.
Is formed of a metal square tube material, and the hooks 11 and 12 are fixed by welding the base ends thereof to predetermined positions on the same side surfaces of the rods 10a and 10b (see FIG. 5).

[0010] Both rods 10a, 10 of the rod-shaped handrail body 10
As shown in FIGS. 3 (B) and 3 (C), a joint 13 for connecting the pair b is connected to a pair of connecting pieces 17, 1 pivotally connected to each other by a bolt 15 and a nut 16 for a pivot.
7 are fixed to the lower surfaces of the opposite ends of both rods 10a and 10b, respectively.
The two rods 10a and 10b are configured to bend only upward from the state where the rods 10a and 10b are in the horizontal posture as shown in FIG. Accordingly, the bar-shaped handrail main body 10 is bent by pulling the joint 13 in a direction opposite to the mounting portion from a state where the opposing end surfaces of both the rods 10a and 10b abut each other and extend linearly. (B)
Can be folded until both rods 10a and 10b are parallel to each other, but when the joint 13 is pulled in the direction of its mounting side, it does not bend and remains held in a straight line.

The joint 13 is provided with a locking means 18 for fixing both the rods 10a and 10b of the rod-shaped handrail main body 10 in a horizontal posture. This locking means 18
As shown in FIGS. 3 (A) to 3 (C),
Opposite ends of the joints 13 at the opposite ends of the joints 0a, 10b, that is, the two rods 10a, 10b.
U-shaped frame member 1 fitted over the upper side of the opposite end
9 and long holes 20a and 20b are formed on both left and right sides of an upper wall portion 19a of the U-shaped frame member 19, and the long holes 20a on the rod 10a side are inward from the outer end side in the U-shaped frame member longitudinal direction. It is formed in a wedge shape such that the hole diameter gradually increases, and the long hole 2 on the rod body 10b side
Reference numeral 0b denotes a large-diameter hole 20b 'formed at the outer end of the U-shaped frame member in the longitudinal direction.
b. In this case, the shaft portion of the fixing pin 21 is tightly fitted on the small-diameter hole side of the long hole 20a, and is loosely fitted on the large-diameter hole side. Although the fixing pin 22 is slightly loosely fitted in the elongated hole 20b, the fixing pin 22 can be pulled out of the large-diameter hole portion 20b 'together with its locking head.

Therefore, according to the locking means 18, the U-shaped frame member 19 is always connected to the rod 10a by the fixing pin 21.
In the positions shown by solid lines in FIGS.
Since the rod 10b is integrally connected to the U-shaped frame member 19 by the fixing pin 22 on the 0b side, the rotation of the rod 10b is prevented, so that both rods 10a and 10b are directed upward and downward from the horizontal posture. Cannot be refracted, and is held and fixed in the horizontal posture. When the U-shaped frame member 19 is slid to the position shown by the imaginary line in FIGS. 3A and 3B, the U-shaped frame member 19 is connected to the rod 10a side by the fixing pin 21. Since the large-diameter hole portion 20b 'of the frame member 19 moves to a position overlapping with the fixing pin 22, the lock means 18 is unlocked, and the rod 10b is moved from the state shown by the solid line in FIG. By rotating in the direction shown in the figure, the fixing pin 22 comes out of the large-diameter hole 20b ', so that the rod 10b can rotate with respect to the rod 10a.
Refraction of 10b is possible.

In order to attach the cross bracing auxiliary railing 4 constructed as described above to the cross bracing 2 bridged between the vertical frames 1 and 1 of the framed scaffold as shown in FIG. First of all,
The lock means 18 of the auxiliary handrail 4 is unlocked, that is, the U-shaped frame member 19 is slid to the unlocked position shown by the imaginary line in FIGS.
The rods 10a and 10b are bent at an appropriate angle in advance.

Then, the two rods 10a, 10b are connected to the diagonal members 2a, 2a forming the lower triangular opening of the cross bracing 2.
And further refracted so that the angle of intersection between the two oblique members 2a, 2a is substantially the same as that of the two oblique members 2a, 2a.
b is positioned parallel to each of the oblique members 2a. In this state, the first hook 1 of each rod 10a, 10b
The first and second hooks 12 are simultaneously fitted into the respective diagonal members 2a from the fitting openings 14 formed between the hooks 11 and 12, and the joint 13 is gripped to obtain the joint shown in FIG.
When the hooks 11 and 12 of the rods 10a and 10b are pushed down as indicated by arrows, the rods 10a and 10b slide along the diagonal member 2a, and the rods 10a and 10b assume a horizontal posture as shown by a virtual line in FIG. In the state, the first hook 1 of each rod 10a, 10b
1 is locked on the upper surface of the diagonal member 2a, and the second hook 12 is locked on the lower surface of the diagonal member 2a, whereby both the rods 10a and 10b, that is, the bar-shaped handrail main body 10, The two slant members 2a are held in a horizontal posture.

Then, the U-shaped frame member 19 of the locking means 18
Is slid from the unlocked position shown by the imaginary line in FIGS. 3A and 3B to the locked position shown by the solid line, both the rods 10a and 10b of the rod-shaped handrail main body 10 are locked. The horizontal posture does not allow upward refraction, and the horizontal posture is fixed to the diagonal members 2a, 2a.
Therefore, when the auxiliary handrails 4 are mounted on the cross braces 2 and the locking means 18 is set to the above-described locking action position, the rod-shaped handrail main body 10 may be erroneously lifted. Also, even if the rods 10a and 10b are pressed from above, the refraction of the rods 10a and 10b is prevented, so that the rods 10a and 10b do not unexpectedly come off the diagonal members 2a and 2a, and are extremely safe. In addition, both rods 10a, 10b
Is also prevented by the joint 13 as described above.

[0016]

According to the first aspect of the present invention, there is provided an auxiliary handrail for use in crossing braces. A substantially downward U-shaped first hook to be hooked on the upper side, and a substantially upward U-shaped second hook to be hooked to the lower side of the diagonal member located closer to the outer end of the rod body than this hook. A simple structure in which a hook and a hook are provided, and an opening is formed between the hooks so that both hooks can be simultaneously fitted into the oblique material with each bar positioned parallel to the oblique material. When installing the rods, bend both rods, insert both rods into each diagonal with each rod positioned parallel to the diagonal, and attach both rods. With almost one-touch operation just for horizontal posture, it can be easily installed at the crossing.

According to the second aspect of the present invention, since the joint refracts both the rods only upward from the horizontal posture, the bar-shaped handrail main body is mounted in a state where the auxiliary handrail is mounted at a crossing line. Even if a downward load is applied to the bar-shaped handrail main body by pressing down from above, the bar-shaped handrail body will not bend, and therefore will not accidentally come off the diagonal member, and is safe.

According to the third aspect, since the joint is provided with the locking means for fixing the both rods in a horizontal posture, even if the rod-shaped handrail main body is erroneously lifted or pressed down, the joint is provided. , Both rods are fixed in a horizontal position,
It is extremely safe without refraction and therefore without accidental detachment from the diagonal.

[Brief description of the drawings]

FIG. 1 (A) is a front view showing an entirety of an auxiliary handrail for crossing streaks according to the present invention, and FIG. 1 (B) is a front view showing a state where the auxiliary handrail is folded.

2 (A) is an enlarged front view of a circle portion surrounded by an arrow X in FIG. 1 (A), and FIG. 2 (B) is an enlarged side view of the same portion.

3A is an enlarged plan view of a circle portion surrounded by an arrow Y in FIG. 1A, FIG. 3B is an enlarged front view of the same portion,
(C) is an enlarged side view of the same part.

FIG. 4 is a front view showing a mounting method of the auxiliary handrail.

FIG. 5 is a schematic perspective view showing an attached state of the auxiliary handrail.

FIG. 6 is a schematic perspective view showing a state in which an auxiliary handrail is attached to an intersection.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical frame of frame scaffolding 2 Crossing braces 2a Diagonal material 3 Scaffolding plate 4 Auxiliary handrail 10 Bar-shaped handrail body 10a Bar 10b Bar 11 First hook 12 Second hook 13 Joint 14 Fitting opening 18 Locking means

Claims (3)

(57) [Claims] In an auxiliary handrail which is horizontally hung over a cross bracing made of a pair of diagonal members stretched between vertical frames of a framed scaffold, a pair of rods are refractably connected by a joint. A bar-shaped handrail main body, and at the outer end of each bar, a substantially downward U-shaped first hook hooked on the upper side surface of the diagonal member, and the outer side of the bar more than the first hook. A substantially upward U-shaped second hook is provided near the edge and hooked on the lower surface of the diagonal member, and each bar is disposed between the first hook and the second hook. An auxiliary handrail for intersecting braces on a scaffolding scaffold, wherein a fitting opening is formed so that both hooks can be fitted into the diagonal member at the same time while being positioned parallel to the diagonal member. 2. The handrail according to claim 1, wherein the joint bends both rods only upward from a horizontal posture. 3. The handrail according to claim 1, wherein the joint is provided with a locking means for fixing the both rods in a horizontal posture.