JPH07102788A - Temporary safety handrail - Google Patents

Abstract

PURPOSE:To make it possible to install temporarily a safety rail on a steel beam or the like simply and easily. CONSTITUTION:This temporary safety handrail comprises handrail frames 3A, 3B which are expandable horizontally and fitted with each other and fixed with fixing screws 7a, 7b and supports 2 vertically installed to a steel beam 14 or the like. Headed pins 10a to 11 are projectingly installed to the outer ends of the handrail frames 3A, 3B. The posts 2 are bored with engagement holes 18a, 18b which engage each of the headed pins 10a to 11b. The engagement holes provide a larger-sized hole 19 which allows the neck 12 of each headed pin to be fitted horizontally and a smaller-sized hole 20 into which a small-sized shaft 13 of the headed pin installed downwardly from the larger-sized hole 19 continuously, is fitted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary handrail for securing a worker by attaching it to a steel beam around a slab of a building under construction or around an opening. is there.

[0002]

2. Description of the Related Art A conventional temporary handrail for temporary use used for the above-mentioned purpose is a steel pipe for a pillar attached to a steel frame beam or the like. It was assembled on-site by joining it using a numbered wire. With such a conventional handrail,
Not only does the assembly work on site take a lot of labor and time, but there is also a problem in the safety of the assembly work itself.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, the features of which will be described with reference numerals of embodiments described later in parentheses. As shown, the temporary safety handrail of the present invention includes a handrail body (1).
And columns (2) attached to steel beams (14),
The handrail body (1) is provided with two handrail frames (3A, 3B), fixing screws (7a, 7b), and headed pins (10a to 11b),
The handrail frames (3A, 3B) are fitted to each other so that they can expand and contract horizontally, and the fixing screws (7a, 7b) are attached to the handrail frames (3A, 3B).
3B) are fixed to each other in a non-stretchable manner, and the headed pins (10a to 11b) are projected from the upper and lower positions of the outer ends of the handrail frames (3A, 3B), and the column (2) is Handrail body
(1) side is provided with locking holes (18a, 18b) for individually locking the upper and lower headed pins (10a to 11b), and the locking holes (18a, 18b)
Is a large-width hole (19) into which the head (12) of the head-equipped pin (10a to 11b) is fitted in the horizontal direction, and a head with a large-diameter hole (19) that is connected downwards. It is characterized by having a small width hole (20) into which the small diameter shaft portion (13) of the pins (10a to 11b) fits.

The pins with heads (10a to 11b) are attached to the columns (2).
Of the handrail frame (3A, 3B)
It can be installed on the B) side. In addition, a pin with a head (10a
~ 11b) project in the direction parallel to the expansion and contraction direction of the handrail frame (3A, 3B), and the locking holes (18a, 18b) are provided in the handrail frame (3A, 3B).
Although it can be provided on the plate parts (17a, 17b) orthogonal to the expansion and contraction direction of (B), the headed pins (10a to 11b) are used for the handrail frame.
(3A, 3B) protruding sideways orthogonal to the direction of expansion and contraction, locking holes
(18a, 18b) are provided on the plate part (23) parallel to the expansion and contraction direction of the handrail frame (3A, 3B), and the narrow hole part (20) of the locking hole (18a, 18b) is slanted. It is possible to prevent the lifting of the handrail frame (3A, 3B) itself by tilting it.

The support column (2) is such that the lower end portion (2a) can be detachably fitted into the tubular body (15) which is erected on the steel beam or the like (14). In this case, The lower end (2a) of the column is formed in a tapered shape, and the tapered intermediate peripheral surface (2
It is possible to prevent the mortar from entering the tubular body (15) by bringing the 5) into contact with the inner peripheral edge (15a) of the upper end of the tubular body (15). Further, a fixing ring (27) having a wedge-shaped cross section that can be pressed downward is provided in the annular space (26) between the lower end portion (2a) of the column and the tubular body (15), and the fixing ring (27) is , Tubular body (1
As long as it has a length protruding above the concrete finish surface (24a) higher than the upper end of 5), the pillar (2) is stably fixed and the mortar is prevented from entering the tubular body (15). It can be prevented more reliably.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1A, 1 is a handrail main body and 2 is a support. The handrail main body 1 is composed of two handrail frames 3A and 3B. The handrail frame 3A is formed by bending a pipe material in a U shape and connecting the upper and lower horizontal portions 4a and 4b near the tips thereof to each other with a vertical connecting rod 5. The handrail frame 3B is a handrail frame 3B. A small-diameter pipe material that can be just fitted in the pipe material that constitutes the sliding frame 3A is bent into a U-shape, and the pair of upper and lower horizontal portions 6a and 6b are a pair of upper and lower horizontal portions of the handrail frame 3A. It is fitted in the 4a and 4b so that it can be freely taken in and out. That is, the handrail frames 3A and 3B are fitted to each other so as to be extendable and contractible in the horizontal direction.

7a and 7b are both handrail frames 3A and 3B
Are non-expandable fixing screws which are screwed into through screw holes formed of through holes and fixing nuts near the tips of the upper and lower horizontal portions 4a, 4b of the handrail frame 3A, and are fastened in the fastening direction. By rotating it, the horizontal portions 6a and 6b on the side of the handrail frame 3B fitted inside are fixed.

A pair of upper and lower headed pins 10a, 10b and 11a, 11b are horizontally outward at the same level on the outer end vertical portions 8 and 9 of the handrail frames 3A and 3B, that is, the handrail frames 3A and 3B. It is projected in a direction parallel to the expansion and contraction direction of 3B. The headed pins 10a-11b are
As shown in FIG. 1B, it comprises a large-diameter head portion 12 and a small-diameter shaft portion 13, and the small-diameter shaft portion 13 penetrates the handrail frame vertical portions 8 and 9 and is fixed thereto by welding. At this time, the small-diameter shaft portion 13 is exposed between the vertical portions 8 and 9 of the handrail frame and the large-diameter head portion 12 by a required length.

The support columns 2 are vertically erected at appropriate intervals in the handrail length direction by fitting a lower end portion 2a into a cylindrical body 15 fixedly projected on a steel beam 14 or the like. The pair of upper and lower locking members 16 are laterally fixed and projected. As shown in FIG. 1B, these locking members 16 are formed by bending an iron plate into a U-shaped cross section, and locking holes 18a and 18b are provided in both left and right side plate portions 17a and 17b. These locking holes 18a and 18b are provided with a large-width hole portion 19 into which the large-diameter head portion 12 of the head-equipped pins 10a to 11b can be fitted, and a head portion that is directly connected downward from the large-diameter hole portion 19. It is a so-called daruma-shaped through hole having a small width hole portion 20 into which the small diameter shaft portion 13 of the pins 10a to 11b fits. The pair of upper and lower locking holes 18a and 18b provided separately for the upper and lower locking members 16 are provided on the handrail frame 3A,
A pair of upper and lower headed pins 10a, 10b and 1 on the 3B side
They are arranged at the same intervals as the vertical intervals of 1a and 11b.

When the handrail main body 1 is mounted between the columns 2, the handrail frame 3 is loosened by loosening the fixing screws 7a and 7b.
A and 3B are contracted so that the total length is shorter than the distance between the support columns 2. Then, the headed pins 10a and 10b of the handrail frame 3A on one side are engaged with the locking holes 18a in the pair of upper and lower locking members 16 of the supporting column 2 on the corresponding side. That is, the large diameter head 12 of the headed pins 10a, 10b
Is fitted into the large-width hole portion 19 of each locking hole 18a. Then, both the handrail frames 3A and 3B are extended so that the headed pins 10a and 10b of the handrail frame 3B are engaged with the locking holes 18b in the pair of upper and lower locking members 16 of the supporting column 2 on the corresponding side. To combine. In this state, the handrail frame 3A,
3B is lowered to fit the small diameter shaft portion 13 of each of the headed pins 10a to 11b into the narrow width hole portion 20 of the engaging holes 18a and 18b. After that, the fixing screws 7a and 7b are tightened to fix the handrail frames 3A and 3B to each other, and locked in a non-expandable state.

The handrail main body 1 erected between the columns 2 as described above has a small diameter shaft portion 13 of each of the headed pins 10a to 11b even if an external force for lifting upward acts on the handrail main body 1. Only moves upward in the locking holes 18a, 18b, and there is no danger that the large-diameter head 12 will come out of the large-width hole portion 19 of the locking holes 18a, 18b. That is, there is no fear that the handrail main body 1 will come off from the column 2. When removing the handrail main body 1 from the support column 2, the handrail main body 1 is lifted with the fixing screws 7a and 7b loosened, and the headed pins 10a to 10a.
The large-diameter head portion 12 of 11b is aligned with the position of the large-width hole portion 19 of the locking holes 18a and 18b, and the handrail frames 3A and 3B are contracted to each other so that the head-equipped pins 10a to 11b are locked to the locking hole 18a. , 18b to escape. In the removed handrail main body 1, both handrail frames 3A and 3B are reduced to the minimum length and fixed with fixing screws 7a and 7b, or
Both handrail frames 3A and 3B can be pulled out from each other to be separated, reduced in bulk and transported and stored.

According to the strut 2 of the above-described embodiment, as shown in FIG. 2, the common striking member 16 having the striking holes 18a and 18b on both the left and right sides is utilized to connect the strut 2 to both sides. Although the handrail main body 1 can be supported, the locking member having the locking hole 18a and the locking member 16 having the locking hole 18b may be provided separately from the column 2. Further, the pair of upper and lower engaging members 16 shown in FIG. 1 can be continuously integrated with each other. Furthermore, the locking holes 18a and 18b can be formed in the pillar itself by using a square pipe-shaped pillar.

FIG. 3 shows a pillar 2 suitable for mounting the handrail main body 1 on the corner portion. That is, this pillar 2
The locking member 21 having the locking hole 18a and the locking hole 18a.
Since the locking member 22 having b is fixed and protruded in a direction forming a right angle to each other, the handrail main body 1 is attached to the pillar 2 at right angles to each other by setting the pillar 2 upright at the corner portion. It can be supported in any direction. Of course, also in this case, the locking holes 18a and 18b can be formed in the column itself by using the column-shaped column.

4 and 5 show pins 10a-1 having heads.
1b projects from the handrail frame vertical portions 8 and 9 in a horizontal horizontal direction at a right angle to the extension and contraction direction of the handrail frames 3A and 3B, and the pillar 2 is a flat plate parallel to the extension and contraction direction of the handrail frames 3A and 3B. In this embodiment, the locking member 23 is fixed and the locking holes 18a and 18b are formed on both left and right sides of the locking member 23. In this embodiment, the locking holes 18a, 18
The small-width hole portion 20 of b is connected to the large-width hole portion 19 obliquely downward and outward. Therefore, the handrail frame 3A,
3B head pins 10a-11b to the locking holes 18a, 1
8b, and then the handrail frames 3A, 3B are lowered while the handrail frames 3A, 3B are contracted, so that the small-diameter shaft portions 13 of the headed pins 10a to 11b are engaged with the locking holes. It can be fitted into the narrow hole portion 20 of 18a, 18b. In this state, the fixing screws 7a, 7
By tightening b to fix the handrail frames 3A and 3B to each other, the lifting of the handrail frames 3A and 3B itself is prevented, and the inclined narrow width hole portion 20 of the locking holes 18a and 18b and the headed pin 10a. ~ 11b small diameter shaft portion 13
You can stop it with and.

Also in this embodiment, as shown in phantom in FIG. 4, the flat plate-like locking member 23 is bent at a right angle to extend in both directions at a right angle, and the locking holes 18a, 18b are provided therein. At the corners, the handrail main body 1 can be supported at right angles to each other, and depending on the cross-sectional shape and size of the pipes forming the support columns, the locking holes 18a, 18b can be provided on the same side surface of the support columns themselves. It is possible to provide or to provide locking holes 18a and 18b on both side surfaces at right angles of the support.

When the handrail is no longer needed, the handrail main body 1 is removed from the column as described above, and then the column 2 is formed.
However, as shown in FIG. 6, when the concrete layer 24 is formed on the steel beam or the like 14 to a level higher than the upper end of the tubular body 15 into which the lower end portion 2a of the column 2 is fitted, If the mortar penetrates between the cylindrical body 15 and the lower end 2a of the support column and solidifies, it becomes extremely difficult to extract the support column 2. Therefore, as shown in the figure, the lower end portion 2a of the support column is formed in a tapered shape, and the tapered intermediate peripheral surface 25 is configured to abut the upper end inner peripheral edge 15a of the cylindrical body 15. It is possible to completely prevent the mortar from entering the inside of the column 15 by the lower end 2a of the column, and since the tapered lower end 2a of the column is extracted from the concrete layer 24, the column 2 can be removed more easily than the straight tube type. It will be easier.

In the embodiment shown in FIG. 7, the lower end portion 2 of the straight pillar
A fixing ring 27 having a wedge-shaped cross section that can be press-fitted downward is used in the annular space 26 between the a and the cylindrical body 15. The fixing ring 27 prevents the mortar from entering the cylindrical body 15. I have to. In this case, the fixing ring 27 has a length protruding above the concrete finish surface 24a higher than the upper end of the tubular body 15. According to this embodiment, the pillar 2 can be stably fixed, and the pillar 2 can be removed more easily.

Further, in the above embodiment, the headed pin 10 is used.
Although a to 11b are provided on the handrail frames 3A and 3B side, and the locking holes 18a and 18b are provided on the support column 2 side, the headed pins 10a to 11b are provided protruding from the support column 2 side, and the locking holes 18a,
18b may be provided on the side of the handrail frames 3A and 3B. In this case, the narrow width hole portion 20 of the locking holes 18a, 18b
Are continuously provided upward from the large-width hole portion 19. In addition, the pillar 2
Can be erected on the steel beam or the like 14 by using an appropriate clamp.

[0019]

As described above, according to the temporary handrail for temporary use of the present invention, the struts can be installed upright at an interval between the minimum length and the maximum length of the extendable handrail main body. For example, the handrail main body whose length has been adjusted to the distance between the two adjacent columns is supported on the column side by the fitting of the pin with the head and the locking hole and the lowering of the handrail main body with respect to the column. By fixing the two handrail frames constituting the above to each other with the fixing screws so that they cannot be expanded and contracted, the handrail main body can be installed between the columns in a state where the handrail main body cannot be easily removed from the columns. That is, the safety handrail can be temporarily and easily and quickly installed.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a support, a handrail main body, and a support stand standing cylindrical body, and FIG. 1B is a perspective view showing a locking hole and a headed pin.

FIG. 2 is a cross-sectional plan view showing an engaging portion between a column and a handrail main body.

FIG. 3 is a cross-sectional plan view showing an engaging portion between a column and a handrail main body at a corner portion.

FIG. 4 is a cross-sectional plan view of an essential part showing a modified example.

FIG. 5 is a vertical cross-sectional front view of essential parts showing the same modified example.

FIG. 6 is a vertical cross-sectional side view showing a support structure of a lower end portion of a column.

FIG. 7 is a vertical cross-sectional side view showing another support structure of a lower end portion of a column.

[Explanation of symbols]

 1 Handrail Main Body 2 Post 2a Post Lower End 3A Handrail Frame 3B Handrail Frame 7a Fixing Screw 7b Fixing Screw 10a Head Pin 10b Head Pin 11a Head Pin 11b Head Pin 12 Large Diameter Head Part 13 Small-diameter shaft part 15 Cylindrical body for stand upright 16 Locking member 18a Locking hole 18b Locking hole 19 Large width hole 20 Small width hole 21 Locking member 22 Locking member 23 Flat locking member 24 Concrete layer 25 Tapered intermediate peripheral surface 27 Fixing ring with wedge-shaped cross section

Claims (6)

[Claims] 1. A handrail main body (1) and a column (2) attached to a steel frame beam (14), the handrail main body (1) for fixing with two handrail frames (3A, 3B). With screws (7a, 7b) and headed pins (10a-11b),
The handrail frames (3A, 3B) are fitted to each other so that they can expand and contract horizontally, and the fixing screws (7a, 7b) are attached to the handrail frames (3A, 3B).
3B) are fixed to each other in a non-expandable manner, and the headed pins (10a to 11b) are projected from the upper and lower positions of the outer ends of the handrail frames (3A, 3B), and the column (2) is The upper and lower head pins (10a to 11b) on the side of the handrail body (1) are provided with locking holes (18a, 18b) respectively, and the locking holes (18a, 18b) are Pin (10a-11b)
The large-diameter hole (19) into which the head (12) of the head is fitted in the horizontal direction, and the head-mounted pin (10a
~ 11b) Small-width shaft part (13) and small width hole part (20) that fits. Temporary safety handrail 2. A handrail main body comprising a handrail main body and a post attached to a steel beam or the like, the post having a headed pin that fits into a plurality of upper and lower engaging holes on the handrail main body side, respectively. Is provided with two handrail frames, a fixing screw and a locking hole, the both handrail frames are fitted to each other in a horizontally expandable and contractible manner, and the fixing screws fix the two handrail frames to each other in a non-expandable manner. Yes, the locking holes are provided at a plurality of upper and lower positions of the outer end portion of the both handrail frames, and the locking holes include a large-width hole portion into which the head of the headed pin on the column side fits horizontally. Temporary safety handrail having a small-width hole portion that is continuously provided upward from the large-diameter hole portion and that fits the small-diameter shaft portion of the headed pin 3. A handrail frame having pins (10a-11b) with heads.
(3A, 3B) protruding in the direction parallel to the expansion and contraction direction, and the locking hole (18
a or 18b) is provided on a plate portion (17a, 17b) orthogonal to the expansion and contraction direction of the handrail frame (3A, 3B).
Temporary safety handrail described in. 4. A handrail frame having pins (10a-11b) with heads.
The locking holes (18a, 18b) are provided so as to project laterally orthogonal to the expansion / contraction direction of (3A, 3B), and the locking holes (18a, 18b) are provided in the plate portion (23) parallel to the expansion / contraction direction of the handrail frame (3A, 3B). The temporary handrail for temporary installation according to claim 1 or 2, wherein the narrow width hole portion (20) of the locking hole (18a, 18b) is inclined. 5. The column (2) is such that the lower end (2a) is removably fitted in a tubular body (15) erected on a steel beam or the like (14), and the lower end of the column is concerned. The (2a) is formed in a taper shape, and the tapered intermediate peripheral surface (25) is brought into contact with the inner peripheral edge (15a) of the upper end of the tubular body (15). Temporary safety handrail. 6. The column (2) is such that the lower end (2a) is detachably fitted in a tubular body (15) erected on a steel beam or the like (14). (2a) and the tubular body (15) The ring-shaped fixing ring (2
7. The fixing ring (27) according to any one of claims 1 to 4, wherein the fixing ring (27) has a length protruding above a concrete finishing surface (24a) higher than the upper end of the tubular body (15). Temporary safety handrail.