JP2000017809A - Handrail joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promote load resistance and building-up efficiency in a handrail joint used for a bent section of a handrail such as stairs, etc., and to reduce a cost. SOLUTION: A handrail joint is constituted of an elbow-shaped joint member 11, a pair of handrail mounting members 12 and 12 and a link plate 13 for connecting them to each other, recessed spherical surfaces 14 and 4 are formed in both end faces of the joint member 11, and projected spherical surfaces 16 of the handrail mounting members 12 are connected to the recessed spherical surfaces to form spherical surfaces. The link plate 13 is made to pass through between both recessed spherical surfaces 14 and 14 of the joint member 11, and both end sections of the link plate 13 are respectively connected to the joint member 11 of the handrail mounting members 12 in a rotatable manner in the rotary center.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handrail joint used at a bent portion of a handrail such as a staircase.

[0002]

2. Description of the Related Art As a handrail joint used for a bent portion of a handrail such as a staircase, the one disclosed in Japanese Utility Model Laid-Open No. 5-35940 is known. As shown in FIG. 5, the joint disclosed in this publication has handrail mounting members 2 and 2 spherically coupled to both end surfaces of an elbow-shaped joint member 1 and provided on each of the handrail mounting members 2 and 2. The connecting bolt 4 is inserted through the groove 3 and screwed to the joint member 1 so as to maintain a constant bending angle. The ends of the handrails 5 and 5 are externally fitted to the respective handrail mounting members 2 and 2 and fixed by fixing bolts 6.

[0003]

The above joint has the advantage that it can cope with any angle between the handrails 5 and 5 and that no gap is formed between the joint member 1 and the handrail mounting members 2 and 2. is there.

However, since the load acting on the joint portion is supported only by the connecting bolts 4, the load resistance is insufficient. Also,
If the angle of the handrail mounting member 2 with respect to the joint member 1 is set by strongly tightening the connecting bolt 4 and then a small angle adjustment is to be performed, the connecting bolt 4 is loosened and adjusted. It is necessary to re-fasten, and there is a problem that workability is poor.

Accordingly, an object of the present invention is to provide a handrail joint which has excellent load resistance and good workability.

[0006]

SUMMARY OF THE INVENTION To solve the above-mentioned problems, the present invention relates to a handrail joint comprising an elbow-shaped joint member, a pair of handrail mounting members, and a connecting means for connecting these members. An angle between both end surfaces of the joint member forms a right angle or a required acute angle, and a concave spherical surface is formed on each of the both end surfaces, and a convex spherical surface matching the concave spherical surface is formed on one end surface of the handrail mounting member. While being formed, a handrail mounting portion is provided at the other end,
The connecting means is constituted by a link plate, the link plate is passed through between the concave spherical surfaces of the joint member, and both ends of the link plate are rotated around the center of rotation of the handrail mounting member with respect to the joint member. It is configured to be movably connected.

[0007] It is possible to adopt a configuration in which a rotation restricting portion of the link plate is provided on each of the handrail mounting members.
Further, the joint member and the handrail mounting member can be formed of a required synthetic resin, and the link plate can be formed of a required metal.

Further, in order to solve the above-mentioned problem, in a handrail joint comprising an elbow-shaped joint member, a pair of handrail mounting members, and a connecting means for connecting these members, the distance between the both end surfaces of the above-mentioned joint member is reduced. The right angle or the required acute angle is formed, a concave spherical surface is formed on each of the both end surfaces, and the handrail mounting member has a convex spherical surface that matches the concave spherical surface on one end surface and the other end surface. A handrail mounting portion is provided at the portion, and the connecting means is constituted by a connecting arm integrated with each concave spherical surface and projecting from the bottom surface thereof. A configuration in which the joint member is rotatably connected at the center of rotation with respect to the joint member can be adopted.

It is possible to adopt a configuration in which each of the handrail mounting members is provided with a rotation restricting portion for the connecting arm.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the handrail joint of the embodiment mainly includes an elbow-shaped joint member 11, a pair of handrail mounting members 12, 12, and a link plate 13 as a connecting means. .

The angle α (see FIG. 2) between both end surfaces of the joint member 11 is a required acute angle (25 ° in the illustrated example).
, And each end face is provided with a concave spherical surface 14 having an opening substantially coinciding with the outer periphery thereof. In addition, the above concave spherical surface 14
Rectangular through holes 15 are provided between the bottom surfaces. As a material of the joint member 11, a plastic such as nylon 6 is suitable.

The handrail mounting member 12 is provided with a hemispherical portion 17 '(see FIG. 2) at one end of a cylindrical body 17, and the outer surface of the hemispherical portion 17' is formed with the concave spherical surface 14 as described above. A convex spherical surface 16 to be fitted is formed. A mounting recess 19 for receiving the end of the handrail 18 in the cylindrical body 17.
Is formed.

The semi-cylindrical portion 2 is provided on the inner end face of the hemispherical portion 17 '.
0 is provided (see FIGS. 1 and 3B), and a pin hole 21 is provided in a hemispherical portion 17 'including the semi-cylindrical portion 20 as a rotation center of the convex spherical surface 16 with respect to the concave spherical surface 14.

The above-mentioned pin hole 2 is provided in the above-mentioned convex spherical surface 16.
A slit 22 including a surface orthogonal to 1 is provided at a position corresponding to the through hole 15 of the joint member 11 fitted spherically. The slit 22 communicates with the mounting recess 19 at the pin hole 21. A parallel regulating wall 23 extending from the communicating portion to the convex spherical surface 16 in parallel with the center line of the mounting recess 19 is provided, and an inclination regulating wall 24 facing the parallel regulating wall 23 and having a 45-degree inclination angle is provided. Can be Further, a fixing hole 25 for the handrail 18 is provided in a part of the mounting recess 19.

As shown in FIG. 1, the link plate 13 has mounting holes 26 at both ends, and is inserted through the through hole 15 of the joint member 11 without play.
It projects by the same length from the central portion of both concave spherical surfaces 14, 14.

In a state where the link plate 13 is penetrated, the joint member 11 is spherically fitted to the handrail mounting member 12 such that the small arc side thereof is on the inclination restricting portion 24 side. At this time, the projecting portion of the link plate 13 is inserted into the slit 22 of the handrail mounting member 12,
Further, by aligning the mounting hole 26 with the pin hole 21 and fitting the spring pin 27, the handrail mounting member 1 is formed.
2 and the link plate 13 are rotatably connected. Then, the closing plug 28 is firmly fitted between the tip of the spring pin 27 and the open end of the pin hole 21.

In the combined state as described above, the link plate 13 rotates together with the joint member 11 about the spring pin 27, but the rotation range is within the range of the parallel restriction wall 23 and the inclination restriction wall 24. Is restricted to a range of 45 degrees.

The bottom of the mounting recess 19 (hemispherical portion 17 ')
A pair of regulating projections 30, 3 facing the inner peripheral surface near the inner end surface
0 (see FIGS. 1 and 2). This regulation protrusion 3
Reference numerals 0 and 30 prevent the leading end of the handrail 18 from interfering with the leading end of the link plate 13 when the handrail 18 is inserted into the mounting concave portion 19.

The joint according to the embodiment is as described above. The joint member 11 and the two handrail mounting members 12 are used in a state in which the joint member 11 and two handrail mounting members 12 are flexibly connected by a link plate 13 as shown in FIGS. , And is bent toward the small arc side of the joint member 11 in accordance with the butting angle of the two handrails 18.

FIG. 2 shows a case where the two handrails 18 and 18 have an angle of 90 degrees by a solid line, and shows a case where the angle is smaller than this or the angle is 0 by a two-dot chain line. In the case of 90 degrees, the link plate 13 is restricted from interfering with the inclination restricting wall 24 and being bent more than that, and the joint member 1
The end a on the small arc side of the one concave spherical surface 14 is prevented from being strongly pressed against the handrail mounting member 12.

With the joint bent at 90 degrees as described above, the end a on the small arc side of the concave spherical surface 14 exceeds the end b of the convex spherical surface 16 as shown in FIG. Reach the surface. For this reason, the space between the end a of the concave spherical surface 14 and the end b of the convex spherical surface 16 is not a perfect spherical surface, but is slightly processed so as to have a cylindrical surface.

The reason why such processing is required is that the angle between both end faces of the joint member 11 is set to α. If the angle between both end surfaces is set to the angle β passing through the end b, the above-mentioned processing is unnecessary, but the small arc of the joint member 11 is shortened, so that the space between the two handrail mounting members 12 is reduced. Has a problem that a step occurs. By setting the above angle to α, the step between both handrail mounting members 12 becomes relatively small.

Even if the above-mentioned joint is bent at various angles, each concave spherical surface 14 and convex spherical surface 16 rotate around the spring pin 27 while maintaining the state of spherical coupling, so that a gap is generated. There is no.

The joint member 11 and the link plate 13 do not move relative to each other, but always move together, so that both can be integrated. FIG.
(C) shows a flat plate-like connecting arm 29 integrally protruding from the bottom surfaces of the concave spherical surfaces 14 and 14 of the joint member 11. Joint member 11 having connection arm 29 described above
And the structure of connection with each handrail mounting member 12 is the same as in the above-described case.

In the second embodiment shown in FIG. 4, the angles of both end faces of the joint member 11 are set at right angles.
In this case, in FIG. 2 showing the first embodiment,
The angle a of both ends of the joint member 11 is set such that the point a for determining the angle α is fixed and α becomes 90 degrees, and corresponds to the crossing angle of the handrail 18 from 90 degrees to 0 degrees. can do. However, as shown in FIG. 4, at a large angle of 90 degrees or close to this, the joint member 11 tends to be recessed between the hemispherical portions 17 ′ of both handrail mounting members 12.

[0027]

As described above, according to the present invention, a pair of handrail mounting members which are spherically connected at both end surfaces of a joint member are rotatably connected by a link plate or a connecting arm which operates integrally with the joint member. By
Since the load acting on the joint is supported by the link plate and the joint member or the joint member having the connecting arm, a large load resistance can be exhibited.

Further, since the angle of this joint changes freely according to the intersection angle of the two handrails, the workability at the time of mounting is improved.

Further, since the structure is simple, the cost can be reduced, and a large gap does not occur between the joint member and the handrail mounting member.
The appearance is also excellent.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment.

FIG. 2 is a cross-sectional view when bent at 90 degrees according to the first embodiment;

3A is a sectional view taken along line III-III in FIG. 2; FIG. 3B is a sectional view taken along line bb in FIG. 2A;

FIG. 4 is a cross-sectional view of the second embodiment when bent at 90 degrees.

FIG. 5A is a cross-sectional view of a conventional example in use, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Joint member 12 Handrail attachment member 13 Link plate 14 Concave spherical surface 15 Through hole 16 Convex spherical surface 17 Cylindrical body 17 'Hemisphere part 18 Handrail 19 Mounting recessed part 20 Semi-cylindrical part 21 Pin hole 22 Slit 23 Parallel regulation wall 24 Inclination regulation wall Reference Signs List 25 fixing hole 26 mounting hole 27 spring pin 28 obstruction plug 29 connecting arm 30 regulating protrusion

Claims (5)

[Claims] In a handrail joint comprising an elbow-shaped joint member, a pair of handrail mounting members and a connecting means for connecting these members, an angle between both end surfaces of the joint member is a right angle or a required acute angle. Together with
A concave spherical surface is formed on each of the both end surfaces, a convex spherical surface matching the concave spherical surface is formed on one end surface of the handrail mounting member, and a handrail mounting portion is provided on the other end portion. Is constituted by a link plate, and the link plate is penetrated between both concave spherical surfaces of the joint member, and both ends of the link plate are rotatably connected to a center of rotation of the handrail mounting member with respect to the joint member. A handrail joint characterized by the following. 2. The handrail joint according to claim 1, wherein each of the handrail mounting members is provided with a rotation restricting portion of the link plate. 3. The handrail according to claim 1, wherein the joint member and the handrail mounting member are formed of a required synthetic resin, and the link plate is formed of a required metal. For joints. 4. In a handrail joint comprising an elbow-shaped joint member, a pair of handrail mounting members, and connecting means for these members, an angle between both end surfaces of the joint member is a right angle or a required acute angle. Together with
A concave spherical surface is formed on each of the both end surfaces, and the handrail mounting member has a convex spherical surface formed on one end surface thereof that matches the concave spherical surface, and a handrail mounting portion is provided on the other end portion. The means is constituted by a connecting arm integrated with each concave spherical surface and protruding from the bottom surface thereof, and each connecting arm is rotatably connected to a center of rotation of the handrail mounting member with respect to the joint member. A handrail joint. 5. The handrail joint according to claim 4, wherein each of the handrail mounting members is provided with a rotation restricting portion of the connecting arm.