JPH09151429A - Universal joint for handrail of guard fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rotatably mount a pair of handrails within a vertical plane including a stanchion, and freely adjust the open angle of the pair of the handrails within a horizontal plane orthogonal with the stanchion. SOLUTION: This universal joint is formed out of a lower joint 8 connected to a cap 7 fixed to the upper end of a stanchion 5, and an upper joint metal fitting 10 fitted to the lower joint metal fitting 8 in such a state as superposed thereon. Also, a handrail 6A is secured to one end of the lower joint metal fitting 8, and another handrail 6B is secured to one end of the upper joint metal fitting 10. Furthermore, the lower joint 8 is jointed to the upper part of the cap 7 so as to be capable of turning freely within a vertical plane including the center axial line of the stanchion 5, and the lower joint metal fitting 8 is jointed to the upper joint metal fitting 10 via a vertical bolt 12, so as to be capable of turning freely within a horizontal plane including the center axial line of the stanchion 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal joint for a handrail of a protective fence, and particularly when a handrail is attached to the upper end of a column, the attachment angle of the handrail to the column can be freely changed, that is, universal. Moreover, the present invention relates to a universal joint for handrails of a protective fence, which has an excellent appearance.

[0002]

2. Description of the Related Art Heretofore, as a joint structure for attaching a handrail to the upper end of a column, a joint structure as shown in FIG. 20 or 21 has been known. The joint structure shown in FIG. 20 is
The U-shaped bolt 1 is inserted into the upper end of the column 2 and the handrail 3 so that the handrail 3 is horizontally fixed to the upper end of the column 2. In the joint structure shown in FIG. 21, a deformed bolt 4 obtained by bending one end of a U-shaped bolt outward is inserted into the upper end of the support column 2 and the handrail 3, and the handrail 3 is horizontally fixed to the upper end of the support column 2. To do.

[0003]

However, in the double joint structure described above, although the handrail 3 can be fixed to the upper end of the column 2, the mounting angle of the handrail 3 to the column 2 cannot be changed.

Therefore, an object of the present invention is to attach a pair of handrails rotatably in a vertical plane including the column when the pair of handrails are mounted on the column with their ends facing each other. (EN) Provided is a universal joint for a handrail of a protective fence, which can freely adjust the opening angle of a pair of handrails in a horizontal plane orthogonal to the support column.

[0005]

According to the first aspect of the present invention,
A handrail of the protective fence for fixing the end of the handrail to the upper end of the pillar of the protective fence so that the angle can be adjusted in a vertical plane including the central axis of the pillar and the angle can be adjusted around the central axis of the pillar. In the universal joint for use, a lower joint metal fitting attached to a cap fixed to the upper end of the column, and an upper joint metal fitting attached to the lower joint metal fitting in an overlapping manner, one of the handrails of the lower joint metal fitting. It is fixed to one end, the other of the handrails is fixed to one end of the upper joint fitting, and the lower joint fitting is freely rotatable in the vertical plane including the central axis of the column by a horizontal bolt on the upper portion of the cap. The lower joint fitting is rotatably connected to the upper joint fitting by a vertical bolt in a horizontal plane orthogonal to the central axis of the column. Those having features that are.

The invention according to claim 2 is characterized in that the other ends of the lower joint fitting and the upper joint fitting are each formed in a semicircular shape.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a universal joint for a handrail of a protective fence of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing a universal joint for handrails of the present invention fixed to a cap of a column, and FIG. 2 is a front view showing a universal joint of handrails of the present invention fixed to a cap of a column. 3, FIG. 3 is a right side view showing the universal joint for handrails of the present invention fixed to the cap of the column, FIG. 4 is a sectional view taken along the line AA of FIG. 1, and FIG. 5 is a diagram of the cap fitted to the column. A plan view, FIG. 6 is a cross-sectional view taken along the line AA of FIG. 5, FIG. 7 is a plan view showing a lower joint fitting in the universal joint for handrails of the present invention, and FIG. 8 is a front view showing the lower joint fitting. Figure 9
Is a right side view showing the lower joint fitting, FIG. 10 is a left side view showing the lower joint fitting, FIG. 11 is a bottom view showing the lower joint fitting, and FIG. 12 is a line AA in FIG. Cross section,
13 is a plan view showing an upper joint fitting in the handrail universal joint of the present invention, FIG. 14 is a front view showing the upper joint fitting, and FIG. 15 is a right side view showing the upper joint fitting.
16 is a left side view showing the upper joint fitting, FIG.
Is a bottom view showing the upper joint fitting, and FIG.
FIG. 19 is a cross-sectional view taken along the line AA of FIG. 19, and is a front view showing a state in which the handrail is fixed to the upper end of the column by the handrail universal joint of the present invention.

1 to FIG. 19, 5 is a protection fence support, and 6A and 6B are a pair of pipe handrails fixed to a cap, which will be described later, fitted on the upper end of the support 5 by a universal joint of the present invention. Is. The ends of the pair of handrails 6A and 6B are opposed to each other with the column 5 in between. Reference numeral 7 is a cap fitted on the upper end of the column 5. Cap 7
As shown in FIGS. 5 and 6, a projection 7A to which a lower joint fitting described later is attached is provided on the upper surface of the projection. The protrusion 7A has a bolt hole 7B into which a horizontal bolt described later is screwed. In addition, the bolt hole 7B may not be penetrating through the projection 7, but the bolt hole 7B may be stopped at a predetermined length to form a blind shape.

Reference numeral 8 is a lower joint fitting, which is attached to the projection 7A of the cap 7 by a horizontal bolt 9.
The horizontal bolt 9 is, for example, a bolt with a hexagonal hole, and as shown in FIG. 3, is screwed into the bolt hole 7B of the projection 7A of the cap 7 through the bolt insertion hole 8A formed in the lower portion of the lower joint fitting 8. doing. As a result, the lower joint fitting 9
Is freely rotatable about the horizontal bolt 9 in a vertical plane including the central axis of the column 5. The horizontal bolt 9
It has a length that does not protrude from the bolt insertion hole 8A. Therefore, an excellent appearance is obtained.

Reference numeral 10 denotes an upper joint fitting which is mounted on the lower joint fitting 8 in an overlapping manner. One handrail 6A is fitted into one end of the lower joint fitting 8 and is fixed by a bolt 11A. The other handrail 6B is the upper joint fitting 1
It is fitted in one end of 0 and is fixed by a bolt 11B. The lower joint metal fitting 8 and the upper joint metal fitting 10 have shapes that match the outer dimensions of the handrails 6A and 6B in a state where they are linearly overlapped. Therefore, the handrails 6A, 6B
There is no step between the joint fittings 8 and 10. Moreover, the other ends 8C and 10B of these joint fittings 8 and 10 are
Since each is formed in a semicircular shape, the other end 10B does not project from the outer surface of the lower joint fitting 8 even when the upper joint fitting 10 rotates. Therefore, an excellent appearance is obtained.

Reference numeral 12 is a vertical bolt for connecting the upper joint metal fitting 10 on the lower joint metal fitting 8 in an overlapping manner.
The vertical bolt 12 is, for example, a hexagon socket head bolt,
It passes through a bolt insertion hole 10A formed in the upper joint fitting 10 and is screwed into a bolt hole 8B of the lower joint fitting 8. Since the vertical bolts 12 are located on the central axis of the column 5, the upper joint fitting 10 freely rotates about the column 5 in a horizontal plane orthogonal to the central axis of the column 5.
Thereby, the opening angle between the lower joint fitting 8 and the upper joint fitting 10 can be freely adjusted.

According to the present invention having the above structure,
According to the universal joint for handrails of the protective fence, as follows,
Handrails 6A and 6B are fixed to the upper ends of the columns 5. First, the cap 7 is fitted on the upper end of the column 5. Next, the lower joint fitting 8 is temporarily fixed to the cap 7 with the horizontal bolt 9.
Next, the end portion of one handrail 6A is placed on the lower joint fitting 8 and fixed by a bolt 11A. Next, the upper joint fitting 10 is superposed on the lower joint fitting 8 with the vertical bolts 12 and temporarily fixed. Next, the end portion of the other handrail 6B is placed on the upper joint fitting 10 and fixed by the bolt 11B. Then, the inclination angles of the handrails 6A and 6B in the vertical plane and the opening angle around the support column 5 are set, and the horizontal bolts 9 and the vertical bolts 12 are fully tightened. In this way, the handrails 6A and 6B are fixed to the upper ends of the columns 5.

[0014]

As described above, according to the present invention, the following useful effects are brought about.

The lower joint fitting to which one end of the handrail is fixed is attached to the cap of the column by a horizontal bolt, and the upper joint fitting to which the end of the other handrail is fixed is overlapped on the lower joint fitting by a vertical bolt. By mounting the pair of handrails, the pair of handrails can be rotatably mounted in a vertical plane including the columns, and moreover, the opening angle of the pair of handrails in a horizontal plane orthogonal to the columns can be freely adjusted.

[0016] Besides the heads of the bolts exposed from the lower surface of the handrail fixing bracket, no bolts are exposed from the outer surface of the joint, so that an excellent appearance is obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing a universal joint for a handrail of the present invention fixed to a cap of a column.

FIG. 2 is a front view showing the universal joint for handrails of the present invention fixed to a cap of a column.

FIG. 3 is a right side view showing the universal joint for handrails of the present invention fixed to a cap of a column.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a plan view of a cap fitted to a column.

FIG. 6 is a sectional view taken along line AA of FIG. 5;

FIG. 7 is a plan view showing a lower joint fitting in the handrail universal joint of the present invention.

FIG. 8 is a front view showing the lower joint fitting.

FIG. 9 is a right side view showing the lower joint fitting.

FIG. 10 is a left side view showing the lower joint fitting.

FIG. 11 is a right side view showing the lower joint fitting.

12 is a cross-sectional view taken along the line AA of FIG.

FIG. 13 is a plan view showing an upper joint fitting in the handrail universal joint of the present invention.

FIG. 14 is a front view showing the upper joint fitting.

FIG. 15 is a right side view showing the upper joint fitting.

FIG. 16 is a left side view showing the upper joint fitting.

FIG. 17 is a bottom view showing the upper joint fitting.

18 is a cross-sectional view taken along the line AA of FIG.

FIG. 19 is a front view showing a state where the handrail is fixed to the upper ends of the columns by the handrail universal joint of the present invention.

FIG. 20 is a partial cross-sectional view showing a conventional joint structure.

FIG. 21 is a partial cross-sectional view showing another conventional joint structure.

[Explanation of symbols]

 1: Bolt 2: Support post 3: Handrail 4: Bolt 5: Support post 6: Handrail 7: Cap 7A: Protrusion 7B: Bolt hole 8: Lower joint fitting 8A: Bolt insertion hole 8B: Bolt hole 8C: Other end 9: Horizontal bolt 10: Upper fitting metal fitting 10A: Bolt insertion hole 10B: Other end 11A: Bolt 11B: Bolt 12: Vertical bolt

Claims (2)

[Claims] 1. An end of a handrail is fixed to an upper end of a pillar of a protective fence so that the angle can be adjusted in a vertical plane including the central axis of the pillar and the angle can be adjusted around the central axis of the pillar. In a universal joint for handrails of a protective fence, a lower joint fitting attached to a cap fixed to the upper end of the column, and an upper joint fitting attached over the lower joint fitting, one of the handrails, Fixed to one end of the lower joint fitting, the other of the handrails,
The lower joint metal fitting is fixed to one end of the upper joint metal fitting, and the lower joint metal fitting is rotatably attached to an upper portion of the cap by a horizontal bolt in a vertical plane including a central axis of the column, and the lower joint metal fitting is A universal joint for a handrail of a protective fence, which is rotatably connected to an upper joint fitting by a vertical bolt in a horizontal plane orthogonal to the central axis of the column. 2. The universal joint for a handrail of a protective fence according to claim 1, wherein the other ends of the lower joint fitting and the upper joint fitting are each formed in a semicircular shape.