JPH0432434Y2 - - Google Patents

Description

[Detailed explanation of the idea] B. Purpose of the invention E-1 Industrial application fields The present invention relates to a handrail corner joint.

A-2 Prior Art Conventionally, in handrails installed on outdoor or indoor stairs, as shown in Fig. 6, straight metal pipes 1 and 2 have been used, and the corner portions have been treated on-site. In this method, the connecting ends 1a and 1b of the metal pipes 1 and 2 to be connected were cut diagonally, and the two ends were butted and connected.

A-3 Problems to be Solved by the Present Invention In the conventional connection method in which the ends of the metal pipes 1 and 2 are cut diagonally at the corner, the bending angle at the corner is cut in half. It had to be cut, and there was a problem in that the cutting work required skill. Therefore, the present invention aims to solve the above-mentioned problems by proposing a corner joint that can be extremely easily connected to various bending angles of the corner without requiring any skill. It is something to do.

B. Structure of the invention B-1. Means for solving the problem In order to solve the above-mentioned problems, the present invention provides a structure in which, when a pair of joint structures 4 and 5 are joined, a joint with a circular cross section is formed. A connecting portion 10 consisting of a lower half is formed protrudingly on one joint structure 4, and a sliding plane 14 is formed on the connecting portion 10.
and a convex spherical surface 12 at one end and a concave spherical surface 18 at the other end.
a, and the other joint structure 5 is formed with a protruding connecting portion 11 consisting of an upper half.
The sliding plane 14 of the lower half connecting portion 10 is the spherical surface 1.
2, 18a, a convex spherical surface 13 is formed at one end of the sliding plane 15, and a concave spherical surface 19a is formed at the other end,
Such joint structures are connected by aligning the sliding planes, the concave spherical surface and the convex spherical surface, and are rotatably connected around a connecting bolt 23 inserted through the center of the connecting part, and Biconcave spherical surface 18
A corner joint for a handrail, characterized in that an opening 22 is formed by cutting out one side of a and 19a.

B-2 Embodiment Next, an embodiment of the present invention shown in FIGS. 1 to 5 will be described.

Reference numeral 3 denotes a corner joint main body, which is composed of two joint components 4 and 5. The respective base portions 6, 7 of the two joint structures 4, 5 are cylindrical, and small diameter pipe connecting cylinders 8, 9 are integrally formed at the rear ends thereof. A connecting portion 10 is formed on the lower half surface of the tip of one joint structure 4,
A connecting portion 11 is formed on the upper half surface of the tip of the other joint structure 5 . Both connecting parts 1
The outer peripheral surface of the first half at 0,11 is one quarter of the sphere
spherical surfaces 12 and 13, and both spherical surfaces 12 and 13 are formed with the same radius. 1
4 is a sliding plane formed on the upper surface of the connecting part 10;
5 is a sliding plane formed on the lower surface of the connecting portion 11. Reference numerals 16 and 17 denote bolt holes located at the center of the sliding planes 14 and 15 and formed in a direction perpendicular to the sliding planes 14 and 15; one bolt hole 16 is formed with a female thread, and the other bolt hole is formed with a female thread. 17 is formed as a non-threaded hole. Edges 14a and 15a on one rear side of both sliding planes 14 and 15 are formed by arcs having the same diameter as the radius of the bolt holes 16 and 17 to the spherical surfaces 12 and 13, and the edge 14
From the inner end points 14b, 15b of a, 15a to the other side end are formed as tangential straight lines 14c, 15c. 18 in the joint structure 4,
This is a projecting piece that projects forward from the base 6 so as to cover the upper rear surface of the substantially circular sliding plane 14.
Reference numeral 19 denotes a projecting piece that projects forward from the base 7 in the joint structure 5 so as to cover the lower rear surface of the substantially circular sliding plane 15. The inner shape of both the protruding pieces 18 and 19 is the same as that of both the connecting parts 10 and 11.
When the bolt holes 16 and 17 are aligned and overlapped, the concave spherical surface 18a of the protruding piece 18 coincides with the spherical surface 13 of the connecting part 11, and the concave spherical surface 19a of the protruding piece 19 aligns with the spherical surface 12 of the connecting part 10. They are each formed into a spherical surface so as to match the . Also, both protruding pieces 1
Half of the front end edges of 8 and 19 are formed in a straight line 20 perpendicular to the axis, and the other half is an inclined surface 21 facing the outer end of the straight lines 14c and 15c in the sliding plane.
This inclined surface 21 allows the projecting piece 1 to
On one side of 8 and 19, there is an opening 22 without this.
is formed. In addition, both joint components 4,
5 have the same shape and are used in opposite directions.

As described above, the sliding planes 14 and 15 of both joint structures 4 and 5 are joined to face each other, and the spherical surface 12 portion is fitted to the inner surface 19a, and the spherical surface 13 portion is fitted to the concave spherical surface 18a. Further, the bolt 23 is inserted into the bolt hole 17, and its threaded end is screwed into the bolt hole 16 to connect the bolt 23. As a result, both joint structures 4 and 5 are connected to be rotatable about the bolt 23. Then, at the site, one handrail pipe 24 is fitted into the pipe connecting cylinder 8 of one joint structure 4, and the other handrail pipe 25 is fitted into the pipe connecting cylinder 9 of the other joint structure 5. Furthermore, both handrail pipes 2
4 and 25 are fixed with bolts 26 and 27.
Then, at the site, both joint components 4,
5 is rotated to match the set angle, and the base of the support column 28 fixed to the handrail pipes 24 and 25 is fixed to the frame 29. In addition, both joint components 4 and 5
When the sliding planes 14 and 15 mutually rotate, the convex spherical surface 12 and the concave spherical surface 9a mutually slide, and the convex spherical surface 13 and the concave spherical surface 18a mutually slide. It is possible to rotate it by
Openings 22 in both protruding pieces 18 and 19 without the protruding pieces 18 and 19
By forming both joint structures 4,
5 can be rotated to angles perpendicular to each other.

Furthermore, since the outer circumferential surfaces of the first half of both the connecting parts 10 and 11 are formed into spherical surfaces 12 and 13 having the same diameter, the connecting parts 10 and 1 of both the joint structures 4 and 5
The mutual outer surfaces in 1 are the same plane even at various connection angles, and when passing a hand through the connection part surface, it feels good to the touch and has a good appearance.

Moreover, if one joint structure 4 is rotated as desired with respect to one handrail pipe 24 in the direction of arrow A in FIG. A desired angle can also be made in the vertical direction with respect to the handrail pipe 24. Therefore, by combining it with the above-mentioned planar rotation, it can be bent in any direction.

C. Effects of the Invention As described above, according to the present invention, the corner portion can be set at a desired angle by rotating the corner joint connected to the handrail pipe. Therefore, there is no need for cutting work to match the angle as in the past, and the set angle can be adjusted simply by rotating the corner joint, making the construction of the corner extremely easy without requiring any skill. Easy to do. In addition, since the outer surfaces of both connecting parts of both joint components are formed with the same spherical surface, the outer surfaces of both connecting parts are continuous on the same surface even at various connection angles, and the feature is that it feels good to the touch and has a good appearance. There is. Furthermore, in this invention, since one side of the biconcave spherical surfaces 18a and 19a is removed to form the opening 22, both components 4 and 5 can be rotated to orthogonal angles, making it practical as a corner joint for handrails. It is extremely effective.

[Brief explanation of drawings]

Figure 1 is a perspective view of the connected state, Figure 2 is a perspective view of the separated state, Figure 3 is a plan view of the connected state, Figure 4 is a sectional view taken along line A-A in Figure 3, and Figure 5 is the joint. The rear view of the structure 4 and FIG. 6 are perspective views of the conventional structure. 4, 5... joint construct, 10, 11...
Connecting portion, 12, 13... Spherical surface, 16, 17... Bolt hole, 18, 19... Protruding piece, 18a, 19a...
...Spherical surface, 23...volts.

Claims (1)

[Scope of utility model registration request] When a pair of joint structures 4 and 5 are joined together, a joint part with a circular cross section is formed, and a connecting part 10 consisting of a lower half is formed protruding from one joint structure 4, and the joint part 10 is formed in a protruding manner. A sliding plane 14 is formed on the portion 10, a convex spherical surface 12 is formed on one end thereof, and a concave spherical surface 18a is formed on the other end, and the other joint structure 5
A connecting part 11 consisting of an upper half is formed protrudingly on the connecting part 11, and a sliding plane 1 of the lower half connecting part 10 is formed on the connecting part 11.
4. A sliding plane 15 corresponding to the spherical surfaces 12 and 18a, a convex spherical surface 13 at one end, and a concave spherical surface 19a at the other end.
These joint structures are connected by matching the sliding planes, the concave spherical surface and the convex spherical surface, and are rotatably connected around a connecting bolt 23 inserted through the center of the connecting part. Furthermore, one side of the biconcave spherical surfaces 18a and 19a is removed to form an opening 22.
A corner joint for handrails characterized by forming a .