JP2704583B2 - Mounting device for temporary handrails for stairs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an installation device for a temporary handrail for stairs temporarily installed at a construction work site or the like.
In particular, the present invention relates to an installation device for a staircase temporary handrail in which a clamp fitted to an upper end of a vertical side plate on the staircase is attached to a lower end of a column of the staircase temporary handrail.

[0002]

2. Description of the Related Art Conventionally, in a handrail mounting device of this type, a main body of a clamp is fixed to a lower end portion of a handrail support by welding.

[0003] In the case of a steel staircase, a clamp attached to the lower end of a pillar is fixed to a vertical side plate on the side of the stairs, and after the railing pillar is attached, the stairs are placed on the steps or on the floor of a landing. In some cases, concrete may be poured near the upper end of the vertical side plate. In this case, it is extremely difficult or impossible to remove the clamps when removing the handrail from the stairs, since some of the clamps attached to the vertical side plates are buried in the concrete and integrated with it, and in most cases The lower end of each handrail post was cut near the upper end of the clamp. However, if the lower end of the column is cut in this way, the railing column cannot be reused, which is very uneconomical.

[0004] As described above, the present invention relates to a case where concrete is poured into stairs after a handrail support is attached and a part of a clamp is buried in concrete.
It is an object of the present invention to provide a mounting device for a temporary stair railing for stairs, which can be removed from a clamp without cutting a railing support.

[0005]

SUMMARY OF THE INVENTION An apparatus for mounting a temporary handrail for stairs according to the present invention is a staircase in which a clamp is fitted to the lower end of a column of the temporary handrail for stairs and fitted to the upper end of a vertical side plate on the side of the stairs. In the attachment device for a temporary handrail, a base of the clamp is detachably attached to a lower end of the support, a laterally extending portion continuously connected to the base from the base, and a laterally extending portion. And a leg that is connected to the lower part of the main body, and presses the vertical side plate on the stairs side between the leg of the main body and the lower end of the column, not with the base of the main body. It is characterized in that the bolt is mounted sideways.

[0006]

Embodiments will be described with reference to the drawings.
FIG. 1 shows a handrail 1 installed on a steel frame staircase S. This handrail 1 is composed of a pair of divided handrails 1A and 1B which are connected so as to be adjustable in the lengthwise direction of the handrail. The handrail 1A is composed of handrail supports 2, 2 and upper and lower handrail horizontal members 3, 3 each formed of a steel pipe material, and the other divided handrail 1B is a steel pipe material of the one divided handrail 1A. It is composed of a handrail support 4 and upper and lower handrail cross members 5 and 5 formed of a steel pipe material smaller in diameter than each other, and each handrail cross member 5 corresponds to the corresponding handrail cross member of the divided handrail 1A. Each of the rails 3 is nested and fixed by a bolt or the like provided on the handrail cross member 3 at a required length.

At the lower end of each handrail post 2, 4 of the handrail 1, a mounting device according to the present invention as described below is mounted, and by this mounting device, each handrail post 2, 4 is attached.
Is attached to the vertical side plate P of the steel frame stairs S. The lower end of each handrail support 2, 4 is a steel frame staircase S
And is attached to the vertical side plate P such that the axis of the bent end is orthogonal to the length direction of the vertical side plate P. Although the handrail 1 shown in FIG. 1 is framed in a state where the handrail cross member 3 is not orthogonal to the handrail supports 2 and 4 and is inclined along the steel frame stairs S,
The railing installed at the landing of the stairs is framed so as to be orthogonal to the railing support, let alone the railing horizontal material, and the lower end of the railing support is attached to the vertical side plate of the landing by the mounting device. Can be Since the mounting devices mounted on the handrail support 2 and the handrail support 4 are the same, hereinafter, only the mounting device on the handrail support 2 will be described.

FIGS. 2 to 4 show the structure of the mounting device.
More specifically, the mounting device includes a clamp 6 fitted to the upper end of the vertical side plate P. The clamp 6 includes a clamp body 7 and a push bolt 8 for pressing and fixing the vertical side plate P. I have. The clamp body 7
A base 9 fitted to the lower end of the handrail support 2 and detachably attached thereto; a pair of laterally extending portions 10 and 10 provided on both sides in a lateral direction from the base 9; The push bolt 8 is provided between the lower ends of the two legs 11, 11 and the lower end of the handrail support 2 between the lower ends of the two legs 11, 11. It is mounted horizontally so as to sandwich the vertical side plate P therebetween.

As shown in FIG. 4, the base 9 of the clamp body 7 is formed in an arc-shaped cross section so that it can be fitted to the lower end of the handrail support 2, and the base 9 is formed from both upper ends of the base 9. A pair of laterally extending portions 10, 10 are integrally extended so as to gradually narrow the distance between each other, and further, the laterally extending portions 1
The two legs 11, 11 are integrally extended downward at right angles from the distal ends of 0, 10, respectively. A nut 12 to which the push bolt 8 is screwed is fixed to a lower side between the two legs 11, 11, and a disc spring 13 abutting on the step side vertical side plate P is rotated at an inner end of the push bolt 8. It is freely attached.

As shown in FIGS. 3 and 4, a bolt 14 for attaching a clamp body for detachably attaching the base 9 of the clamp body 7 to the lower end of the handrail column 2 projects from the lower end of the handrail column 2. A long hole 15 through which the bolt 14 penetrates is formed in the clamp body base 9 at substantially 180 degrees in the circumferential direction as shown in FIG. And the elongated hole 15 penetrating the same, it is possible to rotate within a range of approximately 180 degrees between a left-right posture X and a right-right posture Y at right angles to the handrail length direction.

In order to protrude the bolt 14 for attaching the clamp body from the lower end of the handrail support 2, as shown in FIGS. 4 and 5, a width substantially corresponding to the inner diameter of the handrail support 2 and an appropriate width are used. A fixing plate 17 having a thickness and a length and provided with a screw hole 16 at a predetermined position is inserted into the lower end of the handrail support 2 and fixed at a predetermined position by welding or the like. A screw insertion hole 18 is provided at a position facing the screw hole 16, and after the clamp body 7 is fitted to the lower end of the handrail support post, the bolt 14 is inserted through the elongated hole 15 of the clamp body base 9. The fixing plate 1 through the hole 18
7, and a slight gap is formed between the inner end face of the head of the bolt 14 and the outer peripheral face of the clamp body base 9 as shown in FIG. In this case, the tip of the bolt 14 may be fixed to the fixing plate 17 with an appropriate adhesive.

In this case, an ordinary bolt 14 as shown in FIG.
Bolt 1 with the clamp body 7 rotatable using
By using a stepped bolt having a small-diameter screw shaft portion formed at the tip end thereof to be screwed into the screw hole 16 of the fixing plate 17 instead of fixing the fixing body 4 to the fixing plate 17 with an adhesive, the clamp body 7 can be formed. The stepped bolt itself can be fastened and fixed to the fixing plate 17 in a rotatable state.

Next, the usage of the handrail mounting device having the above-described configuration will be described. As shown in FIG. 4, the clamp 6 attached to the lower end of each handrail support 2 has an angle of approximately 180 degrees between a left-right posture X and a right-right posture Y with respect to the handrail length direction. , But when not in use, such as during storage or transportation, it is in a parallel posture Z parallel to the handrail length direction, and is folded into the same plane as the handrail 1 and Then, the push bolt 8 is directly pressed against the lower end of the column 2 to fix the column 2 in a non-rotatable state.

In attaching the handrail 1 in which the clamp 6 is fixed to the lower end of each column 2 in advance in a posture Z parallel to the lengthwise direction of the handrail, as described above, the handrail 1 is attached to both vertical side plates P, P of the steel staircase S. As shown in FIG. 6, each of the clamps 6 has a push bolt 8 so that the clamp operation can be performed from inside the stairs.
In the case where the handrails are attached in a state of protruding inward, the handrail 1 attached to the right vertical side plate P in FIG.
The clamp 6 fixed to the lower end portion of FIG. 4 is rotated 90 degrees leftward from the parallel posture Z by loosening the push bolt 8 and FIG.
And a right-angled leftward posture X shown in FIG. Thus, the clamps 6 having the right-angled leftward posture X are fitted to the upper end of the vertical side plate P,
The clamp 6 is fixed to the vertical side plate P and the clamp 6 and the column 2 are fixed by tightening the push bolt 8 to clamp the vertical side plate P between the lower end of the column 2 and the push bolt 8.

As for the handrail 1 to be attached to the left vertical side plate P in FIG. 6, the clamp 6 fixed to the lower end of each of the columns 2 in the parallel posture Z is released from the parallel posture Z by loosening the push bolt 8. Rotate right to the right to make a right-angle rightward posture Y
Then, the same clamping operation as described above may be performed.

The handrail 1 to the steel stairs S as described above
After finishing the installation, concrete T is struck on the floor of the landing or on the steps of both vertical side plates P, P as shown by the imaginary line in FIG. Shall be established. When the concrete T is cast in this way, since the push bolt 8 is integrated with the concrete T, when removing the handrail 1 from the stairs S, the push bolt 8 is loosened to release the clamp 6. Operation cannot be performed. However, in this case,
As shown in FIG. 6, the laterally extending portion 10 of the clamp body 7 is
Alternatively, by fusing the leg portion 11 along the cutting line C1 or C2, the clamp body 7 is divided into a base 9 side portion fixing the lower end portion of the column 2 and a portion where the push bolt 8 is mounted. be able to. Thus, the base 9 side portion of the clamp body 7 separated from the push bolt 8 side portion is
If the bolt 14 for attaching the clamp body protruding from the lower end of the column 2 is removed, it can be easily removed from the lower end of the column 2 and the handrail column 2 can be reused as it is. By the way, in the conventional mounting device, the clamp is
Since it is fixed to the lower end by welding, when removing the handrail, the lower end of the column 2 was cut at a position along the cutting line CO as shown in FIG.

When handrails 1 attached to the vertical side plate P are to be removed when concrete is not cast on the stairs, the handrails 1 can be easily removed simply by loosening the push bolts 8 of the clamps 6. After the handrail 1 is removed, the clamp 6 at the lower end of each column 2 is set in the parallel posture Z parallel to the length direction of the handrail, and the push bolt 8 is tightened to directly attach to the lower end of the column 2. What is necessary is just to press and fix. If the clamps 6 are fixed in the parallel posture Z as described above, the clamps 6 are folded into substantially the same plane as the handrails 1. It is extremely advantageous for transportation and storage.

[0018]

In the mounting device according to the first aspect of the present invention, the clamp is fitted to the upper end of the vertical side plate on the staircase side with the base of the clamp body mounted on the lower end of the handrail support. Then, by tightening the push bolt, the vertical side plate is sandwiched between the bolt and the lower end of the column, and the clamp and the lower end of the column are fixed to the vertical side plate.

After the railing has been attached to the stairs as described above, concrete is cast on the floor of the landing or on the steps of both vertical side plates, and a part of the clamp is embedded in the concrete and integrated therewith. If you do
By cutting the laterally extending portions or the legs of the clamp body, the clamp body can be divided into a base portion that fixes the lower end of the column and a portion where the push bolt is mounted. Thus, since the base side portion separated from the push bolt side portion of the clamp body can be removed from the lower end portion of the column, by removing the base side portion from the column lower end portion, each handrail column is It can be reused as it is without cutting the lower end.

According to the mounting device of the second aspect, for example, in a case where handrails are attached to the left and right vertical side plates with respect to the ascending direction of the stairs, and when the clamping operation can be performed from the inside of the stairs, The handrail to be attached to the right vertical side plate may be fitted and attached to the upper end of the vertical side plate in a state where the clamp at the lower end of each handrail support is in a right-angled left-facing posture, and may be attached to the left vertical side plate. As for the sliding, the clamps at the lower end portions of the columns may be fitted to the upper ends of the vertical side plates with the right-angled right posture. Also, when the push bolt of each clamp is attached to the outside of the stairs so that the clamp operation can be performed from the outside of the stairs, the clamp at the lower end of each handrail support is moved to either the right-angled rightward posture or the right-angled rightward posture. I just need.

As described above, by switching the direction of the clamp between the right-angled left position and the right-angled left position, the clamp can be mounted on the inside or outside of the stair-side vertical side plate. Moreover, the operation of switching the direction of the clamp is very simple, since it is only necessary to invert the clamp around the lower end of the column.

[Brief description of the drawings]

FIG. 1 is a side view showing a handrail attached to a stair.

FIG. 2 is an enlarged view of a portion indicated by an arrow A in FIG.

FIG. 3 is an enlarged sectional view taken along line BB of FIG. 1;

FIG. 4 is a plan view of the mounting device shown in FIG. 3;

FIG. 5 is an explanatory sectional view showing an example for projecting a clamp body mounting bolt at a lower end of a handrail support.

FIG. 6 is a partial cross-sectional front view showing a use mode of the mounting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Handrail 2 Handrail support 4 Handrail support 6 Clamp 7 Clamp body 8 Push bolt 9 Base 10 Sideways extension part 11 Leg 14 Clamp body attachment bolt 15 Slot P Vertical side plate on stairs side X Right angle left orientation Y Right angle Rightward posture Z Parallel posture C1 Cutting line of clamp body C2 Cutting line of clamp body C0 Cutting line of lower end of handrail support (in the case of conventional)

Claims (2)

(57) [Claims] 1. A staircase temporary railing mounting device, wherein a clamp fitted to an upper end of a vertical side plate on a step side is attached to a lower end of a pillar of the temporary railing for a staircase. A base portion detachably attached to the base portion, a laterally extending portion laterally connected from the base portion, and a leg portion downwardly connected from the laterally extending portion. A temporary handrail mounting device for stairs, wherein a push bolt for sandwiching the vertical side plate on the stair side is laterally mounted on the leg portion of the main body, not with the base portion of the main body, but with the lower end portion of the column. 2. The clamp according to claim 1, wherein the clamp comprises a bolt for detachably attaching the main body base to the lower end of the column and an elongated hole provided in the main body base so that the bolt penetrates, and is directed rightward at right angles to the handrail length direction. Approximately 18 between the posture and the right-angled left posture
The mounting device for a temporary handrail for stairs according to claim 1, wherein the device is configured to be rotatable within a range of 0 degrees.