JP2807774B2 - Temporary safety railing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary safety handrail for securing workers' safety on 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 safety handrail used for the above-mentioned purpose is a steel pipe for a handrail having an appropriate length attached to a steel pipe for a pillar attached to a steel beam or the like by a pipe clamp or the like. It was assembled on-site by connecting using a line or the like. Such a conventional handrail not only requires a great deal of labor and time for assembling work on site, but also has a problem in the safety of the assembling work itself.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and the invention according to claim 1 has a handrail body (1), A column (2) attached to a steel beam or the like (14), a headed pin (10a to 11b) provided at a plurality of upper and lower portions of one of the handrail body (1) and the column (2), The other headed pin (10) between the handrail body (1) and the support (2)
a to 11b), the locking holes (18)
a, 18b), and the handrail body (1) is fixed to the two handrail frames (3A, 3B) which are fitted to each other so as to be able to expand and contract in the horizontal direction. The pins with heads (10a to 11b) are fixed to the handrail frames (3A, 3A).
B).
a, 18b) are provided on plate portions (17a, 17b) orthogonal to the direction of expansion and contraction of the handrail frames (3A, 3B), and the heads (12) of the headed pins (10a to 11b).
The handrail body (1) with respect to the support (2) from the large-width hole (19) into which the
Is characterized by having a small-width hole portion (20) continuously provided from the large-width hole portion (19) in a direction in which the small-diameter shaft portion (13) of the pin with head (10a to 11b) is fitted by the lowering of the head. Have.

According to the second aspect of the present invention, the pins with heads (10a to 11b) are provided with handrail frames (3A, 3A).
The locking holes (18a, 18b) are provided so as to protrude laterally perpendicular to the direction of expansion and contraction of the handrail frame (3A, 3B).
Are provided on the plate portions (18a, 18b) parallel to the direction of expansion and contraction of the head (1a to 11b).
2) a wide hole (19) into which the handrail body (1) is inserted in the horizontal direction, and a pin (10a to 11b) with a head by lowering the handrail body (1) with respect to the support (2) from the large diameter hole (19). And a small-width hole portion (20) continuously provided from the large-width hole portion (19) in a direction in which the small-diameter shaft portion (13) is fitted. The small-width hole portion of the locking hole (18a, 18b). (20) is inclined obliquely.

[0005] In the invention according to claim 3, the column (2) is a tubular body (1) erected on a steel beam or the like (14).
The lower end portion (2a) is detachably fitted in the lower end portion (5a), and the lower end portion (2a) of the column is formed in a tapered shape, and the tapered intermediate peripheral surface (25) has a cylindrical body (1).
5) It is configured to contact the upper inner peripheral edge (15a).

Further, according to the invention described in claim 4, the column (2) has a cylindrical body (1) erected on a steel beam or the like (14).
5) a lower end portion (2a) is detachably fitted in the lower end portion (2a), and a cross-section capable of being press-fitted downward into an annular gap (26) between the lower end portion (2a) of the support and the tubular body (15). A wedge-shaped fixing ring (27);
Has a length protruding above the concrete finish surface (24a) higher than the upper end of the tubular body (15).

[0007]

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, reference numeral 1 denotes a handrail main body, and 2 denotes a support. The handrail body 1 includes two handrail frames 3A and 3B. The handrail frame 3A is formed by bending a pipe material into a U-shape, and connecting a pair of upper and lower horizontal portions 4a and 4b in the vicinity of the distal end with a vertical connecting rod 5. The handrail frame 3B includes a handrail frame 3B. A small-diameter pipe member which can be fitted into the pipe member constituting the sliding frame 3A is bent into a U-shape, and a pair of upper and lower horizontal portions 6a and 6b are formed as a pair of upper and lower horizontal portions of the handrail frame 3A. 4a and 4b are fitted inside so as to be freely taken in and out. That is, the handrail frames 3A and 3B are fitted to each other so as to be able to expand and contract in the horizontal direction.

Reference numerals 7a and 7b denote both handrail frames 3A and 3B.
Are fixed to each other so as to be inextensible, and are screwed into through-holes formed by through-holes and fixing nuts near the top ends of the upper and lower horizontal portions 4a and 4b of the handrail frame 3A. By rotating, the horizontal portions 6a and 6b on the side of the handrail frame 3B fitted inside are fixed.

[0009] A pair of upper and lower headed pins 10a, 10b and 11a, 11b are provided on the outer end vertical portions 8, 9 of the handrail frames 3A, 3B at the same level in the upper and lower directions, respectively, facing horizontally outward, that is, the handrail frames 3A, 3B. The projection is provided in a direction parallel to the direction of expansion and contraction of 3B. The pins 10a-11b with heads are
As shown in FIG. 1B, the small-diameter shaft portion 13 includes a large-diameter head portion 12 and a small-diameter shaft portion 13, and the small-diameter shaft portion 13 penetrates through the handrail frame vertical portions 8, 9 and is fixed by welding. At this time, the small-diameter shaft portion 13 is exposed to a required length between the handrail frame vertical portions 8 and 9 and the large-diameter head 12.

The support column 2 is vertically erected at appropriate intervals in the handrail length direction by fitting the lower end 2a to a cylindrical body 15 fixedly projected on a steel beam 14 or the like. In this case, a pair of upper and lower locking members 16 are fixedly protruded laterally. These locking members 16 are formed by bending an iron plate into a U-shape in cross section as shown in FIG. 1B, and locking holes 18a, 18b are provided in left and right side plate portions 17a, 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 headed pins 10a to 11b can be fitted, and a head portion connected to the large-diameter hole portion 19 directly downward. It is a so-called ball-shaped through hole having a small hole portion 20 into which the small diameter shaft portion 13 of each of the pins 10a to 11b is fitted. A pair of upper and lower locking holes 18a and 18b provided separately on the upper and lower locking members 16 are used to hold 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 interval as the vertical interval between 1a and 11b.

When the handrail body 1 is mounted between the columns 2, the fixing screws 7a and 7b are loosened and the handrail frame 3 is loosened.
A and 3B are contracted so that the total length is shorter than the interval between the two columns 2. Then, the pins 10a and 10b with the heads 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 corresponding column 2 on the corresponding side. That is, the large-diameter head 12 of the pins 10a and 10b with heads.
Into the large hole portion 19 of each locking hole 18a. Then, the both handrail frames 3A, 3B are extended, and the pins 10a, 10b with heads of the handrail frame 3B are engaged with the locking holes 18b in the pair of upper and lower locking members 16 of the corresponding column 2 on the corresponding side. . In such a state, the handrail frame 3A,
3B is lowered, and the small-diameter shaft portions 13 of the head-mounted pins 10a to 11b are fitted into the small-width hole portions 20 of the engaging holes 18a and 18b which are engaged. Thereafter, the fixing screws 7a and 7b are tightened to fix the both handrail frames 3A and 3B to each other, and locked in a state in which they cannot be expanded or contracted.

The handrail 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 the handrail is applied to the handrail body 1. Only moves upward in the locking holes 18a, 18b, and there is no possibility that the large-diameter head 12 comes out of the large-width hole portion 19 of the locking holes 18a, 18b. That is, there is no possibility that the handrail main body 1 comes off the support 2. When removing the handrail main body 1 from the support 2, the handrail main body 1 is lifted with the fixing screws 7a and 7b loosened, and the pins 10a to
The large diameter head 12 of 11b is aligned with the position of the large hole 19 of the locking holes 18a, 18b, the handrail frames 3A, 3B are contracted with each other, and the pins 10a to 11b with heads are locked with the locking holes 18a. , 18b. The removed handrail main body 1 reduces both handrail frames 3A and 3B to the minimum length and fixes them with fixing screws 7a and 7b, or
The both handrail frames 3A and 3B can be separated from each other by pulling them out, making them bulky and transporting and storing them.

According to the column 2 of the above embodiment, as shown in FIG. 2, a common locking member 16 having locking holes 18a, 18b on both the left and right sides is used, and both sides of one column 2 are used. Although the handrail body 1 can be supported, a locking member having a locking hole 18a and a locking member 16 having a locking hole 18b may be separately provided from the column 2. Further, the pair of upper and lower locking 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 column itself, for example, by using a square pipe-shaped column.

FIG. 3 shows a support 2 suitable for erection of the handrail body 1 at a corner. That is, this support 2
The locking member 21 having the locking hole 18a and the locking hole 18
Since the locking member 22 having the b is fixedly protruded in a direction perpendicular to each other, the support 2 is erected at the corner so that the handrail main body 1 is attached to the support 2 at a right angle to each other. It can be supported in the direction in which it is made. Of course, also in this case, it is possible to form the locking holes 18a and 18b in the column itself by using a column-shaped column.

FIGS. 4 and 5 show pins 10a-1 with heads.
1b is protruded from the vertical portion of the handrail frame 8, 9 horizontally and horizontally at right angles to the direction of expansion and contraction of the handrail frame 3A, 3B, and the support 2 is a flat plate parallel to the direction of expansion and contraction of the handrail frame 3A, 3B. This embodiment shows an embodiment in which a lock member 23 is fixed and lock holes 18a and 18b are formed on both left and right sides of the lock member 23. In this embodiment, the locking holes 18a, 18
The small-width hole portion 20b is connected to the large-width hole portion 19 obliquely outward and downward. Therefore, the handrail frame 3A,
The 3B headed pins 10a-11b are engaged with the locking holes 18a, 1
8b, 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 locked in the respective locking holes. The small holes 18a and 18b can be fitted into the small hole portions 20. In this state, the fixing screws 7a, 7
b, the two handrail frames 3A, 3B are fixed to each other, so that the handrail frames 3A, 3B themselves can be lifted up so that the small-width holes 20 of the locking holes 18a, 18b and the pins 10a with heads are inclined. Small diameter shaft part 13 of ~ 11b
And can be blocked.

Also in the case of this embodiment, as shown by the imaginary line in FIG. 4, the flat locking member 23 is bent at a right angle to extend in both directions at right angles, and the locking holes 18a and 18b are provided in this. 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 pipe constituting the support, locking holes 18a and 18b may be provided on the same side surface of the support itself. The locking holes 18a and 18b can be provided on both right-angled side surfaces of the column.

When the handrail becomes unnecessary, the handrail main body 1 is removed from the support as described above, and then the support 2 is removed.
However, as shown in FIG. 6, when the concrete layer 24 is formed on the steel beam 14 or the like to a level higher than the upper end of the cylindrical body 15 to which the lower end 2a of the column 2 is fitted, If the mortar enters between the tubular body 15 and the lower end 2a of the column and solidifies, it becomes extremely difficult to extract the column 2. Therefore, as shown in the drawing, the lower end portion 2a of the support column is formed to have a tapered shape, and the tapered intermediate peripheral surface 25 is configured to abut on the upper inner peripheral edge 15a of the cylindrical body 15, thereby forming the cylindrical body. Since the mortar can be completely prevented from entering into the lower portion 15 at the lower end portion 2a of the column, and the tapered lower end portion 2a of the taper is extracted from the concrete layer 24, the column 2 is more easily extracted than a straight tube. It will be easier.

In the embodiment shown in FIG.
A wedge-shaped fixing ring 27 which can be pressed downward into the annular gap 26 between the cylindrical body 15 and the cylindrical body 15 is used, and the fixing ring 27 prevents mortar from entering the cylindrical body 15. I have to. In this case, the fixing ring 27 has a length protruding above the concrete finishing surface 24 a higher than the upper end of the tubular body 15. According to this embodiment, the column 2 can be fixed stably, and the column 2 can be more easily extracted.

In the above embodiment, the headed pin 10
Although a to 11b are provided on the side of the handrail frames 3A and 3B and the locking holes 18a and 18b are provided on the column 2, the pins 10a to 11b with heads are protruded from the column 2 side, and the locking holes 18a and 18b are provided.
18b may be provided on the handrail frames 3A and 3B. In this case, the small width holes 20 of the locking holes 18a, 18b
Are continuously provided upward from the wide hole portion 19. In addition, support 2
Can be erected on a steel beam 14 using an appropriate clamp.

[0020]

As described above, according to the temporary safety handrail according to the first aspect of the present invention, the pillars are erected at intermediate intervals between the minimum length and the maximum length of the extendable handrail body. As long as it is installed, the handrail body is extended between the adjacent columns, the headed pin and the large hole of the locking hole are fitted, and the handrail body is lowered with respect to the column. With the small-diameter shaft of the pin with the head fitted into the small-width hole of the locking hole, the handrail body is fixed in a non-stretchable manner with the fixing screw, so that the handrail body easily comes off from the support. By installing the handrail body between the columns in a state where there is no handrail, a temporary safe handrail with high safety can be temporarily installed.

That is, even if a pushing force is applied to the handrail body, the fixing screw for fixing the handrail body so as to be inextensible is loosened, and an external force in the reducing direction acts on the pushed handrail body. Unless otherwise, the handrail main body does not come off from the column, so that an extremely safe handrail can be temporarily installed.

According to the present invention described in claim 2,
Even if a pushing force is applied to the handrail body, the fixing screw that fixes the handrail body so that it cannot be expanded or contracted is loose, and furthermore, the external force in the horizontal and horizontal directions that is perpendicular to the direction of expansion and contraction of the pushed handrail body. As long as the handrail does not act, the handrail main body does not come off from the column, so that a very safe handrail can be temporarily installed.

[Brief description of the drawings]

FIG. 1A is a partially cutaway side view showing a column, a handrail main body, and a column body for supporting a column, and FIG. 1B is a perspective view showing a locking hole and a pin with a head.

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

FIG. 3 is a cross-sectional plan view showing an engagement portion between a support post and a handrail body at a corner portion.

FIG. 4 is a cross-sectional plan view of a main part showing a modification.

FIG. 5 is a vertical sectional front view of a main part showing the modification.

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

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

[Description of Signs] 1 Handrail main body 2 Support 2a Support lower end 3A Handrail frame 3B Handrail frame 7a Fixing screw 7b Fixing screw 10a Headed pin 10b Headed pin 11a Headed pin 11b Headed Pin 12 Large-diameter head 13 Small-diameter shaft 15 Cylindrical body for erected pillar 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 plate Locking member 24 concrete layer 25 tapered intermediate peripheral surface 27 wedge-shaped fixing ring

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) E04G 21/32 E04G 1/26

Claims (4)

(57) [Claims] 1. A handrail body (1) and a steel beam or the like (14)
(2), handrail body (1) and support
A head provided at a plurality of upper and lower portions of one of the pillars (2)
Pins (10a-11b) with the handrail body (1)
The other headed pin (10a to 11a) with the pillar (2)
locking holes (18a, 18a) provided at locations corresponding to (b).
b), and the handrail body (1) is fitted to each other so as to be able to expand and contract in the horizontal direction.
For fixing the two handrail frames (3A, 3B)
(7a, 7b) so that they can be fixed to each other inextensibly.
The pins with heads (10a-11b) are handrail frames
(3A, 3B) is projected in a direction parallel to the direction of expansion and contraction of the (3A, 3B), and the locking holes (18a, 18b) are
3B) on the plate (17a, 17b) orthogonal to the direction of expansion and contraction.
It is provided with a pin with a head (10a-11b)
A wide hole (19) into which the head (12) fits horizontally.
And hand from the large-diameter hole (19) to the support (2).
The pin with head (10a-1)
1b) Large-width hole in the direction in which the small-diameter shaft portion (13) fits
Temporary safety handrail having a narrow hole (20) continuously provided from (19) 2. A handrail body (1) and a steel beam or the like (14).
(2), handrail body (1) and support
A head provided at a plurality of upper and lower portions of one of the pillars (2)
Pins (10a-11b) with the handrail body (1)
The other headed pin (10a to 11a) with the pillar (2)
locking holes (18a, 18a) provided at locations corresponding to (b).
b), and the handrail body (1) is fitted to each other so as to be able to expand and contract in the horizontal direction.
For fixing the two handrail frames (3A, 3B)
(7a, 7b) stretch incapable configured fixed available-from each other by
The pins with heads (10a-11b) are handrail frames
(3A, 3B) projecting sideways perpendicular to the direction of expansion and contraction
The locking holes (18a, 18b) are provided in the handrail frames (3A,
3B) on the plate (18a, 18b) parallel to the direction of expansion and contraction.
The head of a pin with a head (10a-11b)
A wide hole portion (19) into which the portion (12) fits in the horizontal direction;
From this large-diameter hole (19), handrail to the support (2)
The headed pins (10a to 11a)
In the direction in which the small-diameter shaft portion (13) of FIG.
9) and a narrow hole portion (20) continuously provided therefrom.
The narrow holes (20) of the stop holes (18a, 18b) are slanted.
Temporary safety railing sloping 3. The column (2) is erected on a steel beam or the like (14).
The lower end (2a) is detachably inserted into the cylindrical body (15).
The lower end (2a) of the support is tapered.
It is formed in a tapered shape, and its tapered intermediate peripheral surface (2
5) comes into contact with the inner peripheral edge (15a) of the upper end of the tubular body (15)
The temporary safety handrail according to claim 1 or 2 , wherein the handrail is a temporary handrail. 4. The support (2) is erected on a steel beam or the like (14).
The lower end (2a) is detachably inserted into the cylindrical body (15).
The lower end (2a) of the support and the cylindrical body
(15) can be pressed downward into the annular gap (26)
A wedge-shaped fixing ring (27)
The ring (27) has a higher height than the upper end of the tubular body (15).
Length protruding above cleat finish surface (24a)
Temporary safety handrail according to claim 1 or 2 having a.