JP2506040B2 - Handrail for steel stairs - 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 handrail attached to stairs in a steel frame state at a construction site.

[0002]

2. Description of the Prior Art Temporary handrails are attached to steel stairs as protective work while main handrails are being installed. If the temporary handrail is constructed by using a single pipe and a clamp (bonding metal fitting) for connecting the single pipes to each other and a steel frame clamp, workability at the time of mounting and disassembling is poor.

Therefore, as disclosed in Japanese Utility Model Laid-Open No. 4-72132, a fence framed in advance is to be attached. The handrail structure of a steel staircase disclosed in Japanese Utility Model Laid-Open No. 4-72132 connects a first pipe pipe and a second pipe pipe configured to be slidable in the first pipe pipe. Due to the fact that it is made expandable and contractible by using a pipe tube, the entire type is expandable.

By appropriately expanding and contracting the whole in this way,
It is possible to assemble a handrail with an arbitrary size according to the size of the steel frame stairs, and it is possible to perform construction without having to measure the size of the stairs.

[0005]

However, in such a handrail having a telescopic type structure, the weight of one piece is heavy, and it takes time to manufacture, so that the price also rises and the handrail is in an extended state at the time of mounting and dismounting. Workability is poor, and moreover, it is easy to fall when used in an extended state and is unstable in terms of safety. In addition, it will be necessary to inspect the expansion and contraction sections for maintenance at the stockyard such as the equipment center over time.

In addition to this, a fence body having a structure that does not expand and contract is conceivable for attaching a fence body that is framed in advance, but if the fence body itself is large, the weight will also be heavy. However, it is difficult to handle, and there is a problem in dimensional matching with the stairs, and it overhangs greatly.

Further, there is an opening at the rising portion from the stairs, and there is no measure for fall prevention other than fall prevention, which is dangerous.

The object of the present invention is to eliminate the inconveniences of the above-mentioned conventional examples, and to use a simple and lightweight fence as a single body, so that it is easy to handle, easy to install, and inexpensive to manufacture. , By arranging multiple fences, it is possible to adapt to the dimension matching with stairs, and since there is a skirting board inside the fence, it is necessary to provide a handrail for steel stairs that can prevent small objects such as bolts and tools from falling. It is in.

[0009]

In order to achieve the above-mentioned object, the present invention integrally provides an intermediate bar in a ring-shaped frame formed by a pipe whose upper side is an upper bar, lower side is a lower bar, and left and right sides are columns. A U-shaped clamp metal fitting with a screw having a gutter-shaped metal fitting having a semicircular cross section is fixed to the lower rail by fitting the gutter-shaped metal fitting to the lower half of the lower rail and welding the upper edge of the lower rail. , The lower part of the frame below the middle crosspiece is closed with a skirting board to form a fence body, and the fence body is attached as a single unit at a predetermined position via the clamp metal fittings and arranged in parallel, and adjacent fence bodies are mutually The gist is to connect the columns to each other with a shackle-shaped connecting band in the upper and lower positions, and to mount a mounting bracket with a flange protruding on the pipe body on the column, and stack the ends of the skirting board on this flange and bolt it. It is a thing.

[0010]

According to the present invention as set forth in claim 1, since there is a gutter-shaped receiving metal fitting having a semicircular cross section on the upper part of the clamp fitting, the shape of the gutter serves as a guide and the clamp fitting is provided with a round lower lower half half. It is easy to fit into the part, and it can be slid freely at the stage before welding and fixing, so it can be accurately placed at a predetermined position on the lower bar, and at the stage of welding, the side edge of the trough-shaped bracket Alternatively, since the upper edge is welded, it is easy to weld and it is possible to firmly bond them. in this way,
The U-shaped clamp with screw has a simple structure to be attached to the lower rail.

The fence as a single unit is a compact and lightweight one in which a plurality of parallel fences are provided in parallel with each other, and a middle rail is integrally provided in a ring-shaped frame. Since the lower part of the frame below the middle crosspiece is closed by the skirting board, it is possible to prevent small objects such as bolts and tools from falling.

Further, since the fences to be juxtaposed are connected to each other by the connecting band, the force is distributed to the other fences when a person is applied more and the safety is further improved.

According to the second aspect of the present invention, in addition to the above-mentioned action, a skirting board is provided in the frame constituting the fence, and a structure which can be easily attached is provided.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a front view showing an embodiment of a handrail for steel stairs of the present invention, FIG. 2 is a plan view of the same as above, and FIG. 3 is a side view from a landing portion.

In the figure, reference numeral 1 denotes a fence body, and an inner bar 6 made of a pipe is integrally provided in a rectangular ring frame 5 made of a pipe having an upper bar 2 as an upper side, a lower bar 3 as a lower side and columns 4 as left and right sides. I made it a day letter.

As shown in FIG. 4 and FIG. 5, the fence 1 is provided on the ascending / descending portion A of the stairs and on the landing B. In FIG. 4, the frame 5 is rectangular for the landing B. In FIG. 5, the frame 5 for the elevating part A has a parallelogram shape. Although not shown in the figure, these two types are assumed to have several types having different widths, for example, 1.2 m, 0.9 m, and 0.6 m.

Clamp metal fittings 7 are provided one by one on the lower rail 3 of the fence 1 near the left and right ends. The clamp metal fittings 7 have a horizontal U-shaped metal piece with a downward opening as shown in FIGS. 8 to 10. Bolt 8 that penetrates one side and the tip is close to the other piece
Further, a trough-shaped receiving fitting 9 having a semicircular cross section is provided on the upper portion by welding.

Then, by fitting the gutter-shaped receiving metal fitting 9 in the lower half portion of the lower rail 3 and welding the upper edge thereof, the clamp metal fitting 7 is projected from the lower rail 3 through the trough-shaped metal fitting 9. .

The fence 1 closes the lower part of the frame 5 below the middle crosspiece 6 with a skirting board 10. The skirting board 10 is attached to one end by a hinge as shown in FIGS. 6 and 7. A fitting 12 in which a flange 13 which is an extended portion of the curved plate is projectingly attached to a tubular body 12 made of a combination of the curved plates is fitted to the support column 4 to form a skirting board.
The ends of 10 were sandwiched by this flange 13 and fastened with thumbscrews 14.

The fence 1 as a single body thus formed
Is by fixing the clamp metal fitting 7 to the rising flange around the sasara girder of the stairs and the landing B with bolts 8,
Attached in parallel via this clamp metal fitting 7,
Further, the adjacent fences 1 were connected to each other with the stanchions 4 at the upper and lower positions by the shackle-shaped connecting band 15. In that case, the fence 1 is made by combining several types with different widths to size the stairs.

As shown in FIGS. 11 and 12, the connecting band 15 is formed by stacking plates 16 each having a curved portion 16a facing each other so as to form a ring body, and fastening the stacked portion with bolts and nuts 17. I will do it. A spring washer is provided as a packing 19 between the plates 16 of the bolt / nut 17.

In this case, the plate 16 may be formed by stacking two plates 16 having curved portions 16a on both left and right ends.
In this embodiment, each plate 16 is provided with a curved portion 16a only at one end, and four plates 16 are stacked so that the positions of the curved portions 16a are staggered.

Further, each plate 16 is formed with an end closed laterally long hole 18 for inserting a bolt, the laterally long holes 18 are aligned with each other, the plates 16 are stacked, and the bolts and nuts 17 are inserted.

When mounting, the curved portions 16 facing each other
The outer circumference of the column 4 is sandwiched with a and tightened with bolts and nuts 17, but the plate 16 is slid through the horizontally elongated holes 18 so that the distance between the left and right curved portions 16a is different with respect to the bolts and nuts 17, and the length is adjusted. It can be performed.

In the examples of FIGS. 11 and 12, bolts and nuts are used.
Two sets of 17 are provided, but when the plate 16 is slid, these are more easily located in the center. Therefore, when the plate 16 is lengthened, it is desirable to dispose a total of three sets or more of one bolt and nut 17 at the center and one at each end.

Further, when the plate 16 is lengthened in this manner, the number of packings 19 which are spring washers is also increased appropriately.

FIG. 13 shows another embodiment of the present invention in which the stairway landing B is circular. In such a case as well, the relatively narrow fences 1 are arranged along this circle, and the columns are joined at the upper and lower positions by the shackle-shaped connecting band 15.

[0028]

As described above, the handrail for steel staircases of the present invention has a simple structure and a lightweight fence body,
Easy to handle, easy to install, and
It can be manufactured at low cost. Moreover, by arranging a plurality of the fences, it is possible to adapt to the dimension matching with the stairs.

Also, since the skirting board is provided in the fence,
Small items such as bolts and tools can also be prevented from falling, improving safety, and in addition to this, since the fence bodies are connected with a connecting band, the force can be applied to other fence bodies when a person takes more. Will also be distributed and more secure.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a handrail for steel-frame stairs according to the present invention.

FIG. 2 is a plan view showing an embodiment of the handrail for steel stairs of the present invention.

FIG. 3 is a side view from the landing part showing an embodiment of the handrail for steel stairs of the present invention.

FIG. 4 is a front view of a fence for a landing.

FIG. 5 is a front view of a fence for the lifting unit.

FIG. 6 is a front view of the lower part of the fence.

FIG. 7 is a front view of an attachment portion of a skirting board.

FIG. 8 is a side view of a clamp fitting.

FIG. 9 is a plan view of a clamp fitting.

FIG. 10 is a front view of a clamp fitting.

FIG. 11 is a plan view of a connecting band.

FIG. 12 is a front view of a connecting band.

FIG. 13 is a plan view of a landing portion of another shape showing another embodiment of the handrail for steel stairs of the present invention.

[Explanation of symbols]

1 ... Fence 2 ... Upper rail 3 ... Lower rail 4 ... Post 5 ... Frame 6 ... Middle rail 7 ... Clamp metal fitting 8 ... Bolt 9 ... Gutter-shaped receiving metal fitting 10 ... Baseboard 11 ... Mounting metal fitting 12 ... Tube 13 ... Flange 14 ... Thumbscrew 15 ... Connection band 16 ... Plate 16a ... Curved part 17 ... Bolt / nut 18 ... Horizontally elongated hole 19 ... Packing

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masashige Yoneda 1-15-7 Matsushima, Edogawa-ku, Tokyo Edogawa Koki Co., Ltd. (56) Reference JP-A-3-206265 (JP, A) JP-A 60-126464 (JP, A) Actually opened 63-127556 (JP, U) Actually opened 56-139746 (JP, U) Actually opened 56-149758 (JP, U)

Claims (2)

(57) [Claims] 1. A threaded connector having a trough-like metal fitting having a semicircular cross section in the upper part of which is integrally provided a ring-shaped frame by a pipe whose upper side is an upper bar, lower side is a lower bar, and left and right sides are columns. The gutter-shaped clamp metal fitting is fixed to the lower rail by fitting the gutter-shaped metal fitting to the lower half of the lower rail and welding the upper edge of the lower rail. To form a fence body, which is attached as a single body at a predetermined position via the clamp metal fittings to be juxtaposed to each other. A handrail for steel-framed stairs that is characterized. 2. The handrail for steel-frame stairs according to claim 1, wherein a mounting bracket having a flange projecting from the tubular body is fitted to the support, and the end of the skirting board is overlapped with the flange and bolted.