JPH083581Y2 - Connecting band for handrails for steel stairs - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handrail connecting band for a steel staircase used for a temporary handrail attached to a staircase 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 pipe and a clamp (bonding metal fitting) for connecting the single pipe pipes to each other and a steel frame clamp, the workability at the time of mounting and disassembling is poor. The inventor created a handrail for steel-frame stairs as shown in FIGS.

In the figure, reference numeral 1 is 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 on the upper side, a lower bar 3 on the lower side, and columns 4 on the left and right sides. And make it a day letter, and clamp metal 7 on the lower rail 3 of this fence 1.
One is provided near the left and right ends.

As shown in FIGS. 6 to 8, the clamp metal fitting 7 has a bolt 8 which penetrates one side of a downwardly-opening, horizontal U-shaped metal piece and has its tip close to the other piece. A trough-shaped receiving fitting 9 having a semicircular cross section was provided on the upper portion by welding.

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

Further, the fence 1 has a lower part inside the frame 5 below the middle crosspiece 6 closed by a skirting board 10. As shown in FIG. 9, a tube body 12 made of a combination of curved plates with one end hinged. A mounting bracket 11 with a flange 13 that is an extension of the curved plate
Is fitted to the pillar 4, and the end of the skirting board 10 is sandwiched by this flange 13,
Fastened with 14 thumbscrews.

The fence 1 as a single body is attached through the clamp metal fittings 7 by mounting the clamp metal fittings 7 on the rising flanges around the sasara girders and the landing B of the stairs and fixing them by the bolts 8 and arranged in parallel.

Further, between the adjacent fences 1, the columns 4 are connected to each other at the upper and lower positions by the connecting band 15 having a shackle shape. As shown in FIG. 10, the connecting band 15 is formed by stacking plates 16 having curved portions 16a facing each other at their ends, and fastening the stacked portions of the plates 16 with bolts and nuts 17.

If the fences are connected to each other by the connecting band in this way, the force is dispersed to the other fences when a person is applied more, and the safety is further improved.

[0011]

[Problems to be Solved by the Invention] However, since the connecting band 15 has a constant length, it cannot be used if the intervals between the fences 1 are not uniform, and the fences are adjusted according to the size of the stairs. It is difficult to adjust the position of the appropriate number of 1s.

The object of the present invention is to eliminate the inconvenience of the conventional example and to make it expandable and contractible so that the space between the fences can have a width, and as a result, the arrangement of the handrails can be aligned with the stairs. Another object of the present invention is to provide a connecting band for a handrail for a steel staircase that can be easily manufactured.

[0013]

In order to achieve the above object, the present invention is a ring-shaped frame made of a pipe having an upper bar on the upper side, a lower bar on the lower side, and supporting columns on the right and left sides, and a screw on the lower bar. The fences provided with the U-shaped clamp fittings are attached in parallel to each other through the clamp fittings and attached to the steel frame staircase sasara girders, etc. In a steel-frame stair handrail in which stacked plates are overlapped and the overlapped parts are fastened with bolts and nuts to connect them with each other, the connection band has four plates with curved parts at the ends. The gist of the invention is that the plates are stacked so that their positions are staggered, and that each plate is provided with an end closing laterally long hole for inserting a bolt so that the plate can expand and contract.

[0014]

According to the present invention, if the bolts and nuts are loosened,
Through the laterally elongated holes, the plates can be slid relative to each other so that the distance between the left and right curved portions is different with respect to the bolt / nut, and thus the length can be adjusted.

[0015]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a plan view showing an embodiment of a connecting band for a handrail for steel frame stairs, and FIG. 2 is a front view of the same.

The connecting band 15 is constructed by stacking plates 16 having curved portions 16a facing each other so as to form a ring body, and fastening the stacked portions with bolts and nuts 17 as in the conventional example. It is the same as shown in FIG.

The present invention uses four plates 16 each having a curved portion 16a only at one end thereof, and each plate 16 is formed with an end closing laterally elongated hole 18 for inserting a bolt.

Four plates 16 are stacked so that the positions of the curved portions 16a are staggered, and the horizontally elongated holes 18 are aligned with each other.
Stack 16 and insert bolts and nuts 17. Further, a spring washer as a packing 19 is arranged between the plates 16 of the bolt / nut 17.

At the time of installation, the bolts and nuts 17 are loosened so that the plate 16 is opened, the outer circumferences of the columns 4 are sandwiched between the curved portions 16a facing each other, and the bolts and nuts 17 are tightened.

At this time, the lengths of the plates 16 are adjusted by sliding the plates 16 through the horizontally elongated holes 18 so that the intervals between the left and right curved portions 16a are different with respect to the bolts and nuts 17.

Even if the bolts and nuts 17 are loosened, they are horizontally long holes.
Since 18 is a hole for closing the ends, the bolts and nuts 17 will not come off from here and the plates will not come apart.

By the way, in this embodiment, the bolt / nut 17
There are two sets, 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 way, the number of packings 19 which are spring washers is also increased appropriately.

[0024]

[Effects of the Invention] As described above, the connecting band of the handrail for steel-frame stairs of the present invention allows the fences to be spaced apart from each other by making the entire length expandable and contractable. The arrangement of the handrail makes it easy to match the dimensions with the stairs.

Further, the plates are not separated from each other and are easy to handle.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a connecting band of a handrail for a steel staircase according to the present invention.

FIG. 2 is a front view showing an embodiment of a connecting band of a handrail for steel stairs according to the present invention.

FIG. 3 is a front view showing an example of a handrail for steel stairs.

FIG. 4 is a plan view showing an example of a handrail for steel-frame stairs.

FIG. 5 is a side view from a landing portion showing an example of a handrail for steel-frame stairs.

FIG. 6 is a side view of a clamp fitting.

FIG. 7 is a plan view of a clamp fitting.

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

FIG. 9 is an enlarged front view of a baseboard attachment portion.

FIG. 10 is a plan view showing a conventional example.

[Explanation of Codes] 1 ... Fence 2 ... Upper bar 3 ... Lower bar 4 ... Column 5 ... Frame 6 ... Middle bar 7 ... Clamp metal 8 ... Bolt 9 ... Gutter-shaped metal fitting 10 ... Baseboard 11 ... Mounting metal 12 ... Tube 13 ... Flange 14 ... Thumbscrew 15 ... Connection band 16 ... Plate 16a ... Curved part 17 ... Bolt
Nut 18… Horizontal hole 19… Packing

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masashige Yoneda 1-15-7 Matsushima, Edogawa-ku, Tokyo Edogawa Koki Kogyo Co., Ltd. (56) 63-127547 (JP, U) Actually open 62-34051 (JP, U) Actually open 56-34947 (JP, U) Actually public 36-6728 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A fence which is a ring-shaped frame formed of a pipe having an upper bar on the upper side, a lower bar on the lower side, and supporting columns on the left and right sides, and further having a middle bar, and a U-shaped clamp metal fitting with a screw provided on the lower bar. Mounted side by side through metal fittings on steel frame staircase girders, etc., adjoining fences are at the top and bottom positions of the pillars, stack plates with opposing curved parts at the ends, and fasten this overlap part with bolts and nuts In a handrail for a steel staircase that is connected by a shackle-shaped connecting band, the connecting band is formed by stacking four plates having curved portions at their ends so that the positions of the curved portions are staggered, and Is a connecting band for handrails for steel stairs, which is provided with a horizontally elongated hole for closing the end for inserting a bolt so that it can expand and contract.