JP3096847U - Universal joint for handrails - Google Patents

Abstract

The present invention provides a universal joint for handrails that can connect handrails so that each handrail has a predetermined angle in two different directions and has a wider application range.
A handrail universal joint 1 has a pair of cap-shaped end members 2A each having a convex spherical surface portion 21 in which one end of each of two handrails B to be connected is fitted and fixed and a slit is formed in a head. , 2B, a ring-shaped intermediate member 3 having a concave spherical portion 31 disposed between both end members 2A, 2B and receiving the convex spherical portion 21 slidably at both ends, a slit and intermediate member 3 of both end members 2A, 2B. And a connecting shaft 4 that is inserted through the center through hole 32 of the first member 2 to connect these members 2A, 2B, 3 so that the connecting angle can be adjusted. The slits of the end members 2A and 2B have a first slit 211a extending radially from the top of the convex spherical portion 21 and a second slit 211b extending in the circumferential direction so as to intersect the end of the first slit 211a in a T-shape. And
[Selection] Figure 2

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a universal joint used to connect bar-shaped handrails installed on stairs, corridors, and the like.
[0002]
[Prior art]
As shown in FIGS. 12 and 13, a convex spherical portion (821) in which one end of each of two handrails to be connected is fitted and fixed and a slit (822) is formed in the head, as shown in FIGS. A pair of cap-shaped end members (82A) (82B) and a concave spherical surface disposed between the two end members (82A) (82B) and slidably receiving a convex spherical portion (821) at both ends. A ring-shaped intermediate member (83) having a portion (831), a slit (822) of both end members (82A) and (82B) and a central through hole (832) of the intermediate member (83) are inserted into the both end members (82A). ) (82B) and a connection shaft (84) for connecting the intermediate member (83) so that the connection angle can be adjusted. The slits (822) of the end members (82A) and (82B) are formed on the convex spherical portion (821). Diameter from top Being formed so as to extend in is known (e.g., see Patent Documents 1 to 3 below).
[0003]
[Patent Document 1]
JP-A-11-6267 (Claims, drawings, etc.)
[Patent Document 2]
JP-A-11-93367 (claims, drawings, etc.)
[Patent Document 3]
JP 2000-54586 A (claims, drawings, etc.)
[0004]
[Problems to be solved by the invention]
However, in the case of the above-mentioned conventional universal joint (81), the slit (822) formed in the convex spherical portion (821) of each end member (82A) (82B) extends only in one direction. The connection angle between the end members (82A) (82B) and the intermediate member (83) could be adjusted only in one plane passing through the slit (822).
[0005]
Therefore, when it is necessary to connect the handrails at a certain angle both when viewed from a plane and when viewed from the side, such as a handrail for a turning staircase, the universal joint (81) described above I couldn't respond. Further, no other universal joint that can be used for such a purpose was found.
[0006]
An object of the present invention is to provide a universal joint for handrails, which can connect handrails so that each handrail has a predetermined angle in two different directions and has a wider applicable range.
[0007]
[Means for Solving the Problems and Effects of the Invention]
This invention is based on the idea that a pair of cap-shaped end members each having one end of each of two handrails to be connected and having a convex spherical portion with a slit in the head are inserted between the two end members. And a ring-shaped intermediate member having a concave spherical portion at both ends that slidably receives the convex spherical portion, and a slit formed at both ends and a central through hole of the intermediate member to connect the both end members and the intermediate member with each other. In a universal joint for handrails having a connecting shaft that is connected to be adjustable, a slit of each end member is formed in a T-shape with a first slit extending radially from the top of the convex spherical portion, and an end of the first slit. It is characterized by comprising a second slit extending in the circumferential direction so as to intersect.
[0008]
Further, in the handrail universal joint according to the present invention, the slit of each end member has a first slit extending radially from the top of the convex spherical portion, and a diameter such that the slit intersects the top end of the first slit in an L-shape. Also included is a second slit extending in the direction.
[0009]
According to the above universal joint, in two planes each including the first slit and the second slit crossing the first slit and the T-shape or the L-shape, the connection angle between each end member and the intermediate member, and thus the two Of the handrails can be adjusted. Therefore, according to the above universal joint, the connection angle between the handrails can be adjusted over a wider range than in a conventional universal joint having a slit extending in only one direction, and the applicable range is accordingly increased. . That is, for example, by using the above-mentioned universal joint when connecting handrails to be installed on the rotating stairs, the connection angle is adjusted to a required connection angle when viewed from the side while maintaining the connection angle of 90 ° when viewed from a plane. It is possible to do.
[0010]
[Embodiment of the invention]
1 to 7 show a first embodiment of the present invention.
[0011]
In these figures, the handrail universal joint (1) according to the present invention has a convex spherical portion (21) in which one end of each of two handrails (B) to be connected is fitted and fixed and a slit is formed in the head. And a concave spherical portion (2A) (2B) having a pair of end surfaces and a concave spherical portion (2) disposed between the two end members (2A) (2B) and slidably receiving the convex spherical portion (21). A ring-shaped intermediate member (3) having at both ends 31) and slits of both end members (2A) and (2B) and a central through hole (32) of the intermediate member (3) to be inserted into both end members (2A) ( 2B) and a connection shaft (4) for connecting the intermediate member (3) so that the connection angle can be adjusted. The slit of each end member (2A) (2B) intersects the first slit (211a) extending in the radial direction from the top of the convex spherical portion (21), and the T-shaped end of the first slit (211a). And a second slit (211b) extending in the circumferential direction.
[0012]
The end members (2A) and (2B) are made of metal, and as shown in detail in FIGS. 4 to 6, a cylindrical portion (22) into which one end of a rod-shaped handrail (B) having a circular cross section can be fitted. As described above, the head portion (21) is formed of the convex spherical portion (21) and connected to one end of the cylindrical portion (22). Two through holes (221) are formed in the cylindrical portion (22) at radially symmetric positions. A screw (5) is screwed into one end of the handrail (B) fitted in the cylindrical portion (22) through the through hole (221), so that one end of the handrail (B) is an end member (2A) (2B). (See FIG. 7).
[0013]
The first slit (211a) has a length that extends from the top of the convex spherical portion (21) in the end members (2A) and (2B) to the height center. The second slit (211b) has a substantially semi-circular shape that crosses the end of the first slit (211a) in a T-shape at the center of its length.
[0014]
The intermediate member (3) is also made of metal and, as shown in FIGS. 1 to 3, has an inner cylindrical portion (3a) having a central through hole (32) and an annular connecting wall outside the inner cylindrical portion (3a). And an outer tubular portion (3b) provided through the portion (3c) and longer than the inner tubular portion (3a). The concave spherical portions (31) are provided at both ends of the inner cylindrical portion (3a) such that their centers coincide with the axes of the through holes (32).
[0015]
The connecting shaft (4) is composed of a set of bolts (41) and nuts (42) as shown in FIGS. Between the head (411) of the bolt (41) and the back surface of the convex spherical portion (21) of one end member (2A), and between the nut (42) and the convex spherical portion (21) of the other end member (2B). A donut-shaped slider (6) made of plastic, rubber, or the like having a small coefficient of friction is interposed between the rear surface and the rear surface. Further, between the surface of the convex spherical portion (21) of one end member (2A) and the surface of the concave spherical portion (31) of one end of the intermediate member (3), and the convex spherical portion of the other end member (2B). A flat annular slider (7) made of plastic, rubber, or the like having a small friction coefficient is interposed between (21) and the surface of the concave spherical portion (31) at the other end of the intermediate member (3). . With the above configuration, each of the end members (2A) and (2B) forms a spherical pair with the intermediate member (3), and is rotatable around the connection shaft (4) with respect to the intermediate member (3). .
[0016]
In the above universal joint for handrails (1), for example, as shown in FIG. 1, both end members (2A) and (2B) and an intermediate member (3) can be used in a state where they are aligned. At this time, both ends of the bolt (41) constituting the connecting shaft (4) are located at the top ends of the first slits (221a) in the both end members (2A) and (2B).
[0017]
Then, as shown in FIGS. 2 and 3, for example, the other end member (2B) is tilted from the state shown in FIG. 1 in a direction parallel to the first slit (211a) with respect to the intermediate member (3). As a result, the tip of the bolt (41) moves along the first slit (211a) of the end member (2B), whereby the connection angle between the end member (2B) and the intermediate member (3) is reduced. It changes within a plane including one slit (211a). When the tip of the bolt (41) has been moved to the end of the first slit (211a) and the end member (2B) is further tilted in a direction parallel to the second slit (211b), this time, The tip of the bolt (41) moves along the second slit (211b), so that the connection angle between the end member (2B) and the intermediate member (3) is within a plane including the second slit (211b). It changes in. As described above, according to the universal joint (1), each end member is provided in the first plane including the first slit (211a) and in the second plane including the second slit (211b) intersecting the first slit (211a). (2A) It is possible to adjust the connection angle between (2B) and the intermediate member (3), and thus the connection angle between the two handrails (B).
[0018]
FIGS. 7 and 8 show a state in which two handrails (B) for rotating stairs are connected by the universal joint (1). One end of each of the two handrails (B) is fitted into the cylindrical portion (22) of each of the end members (2A) and (2B), and further into the one end through the through hole (221) of the cylindrical portion (22). By screwing the screw (5), the screw (5) is connected and integrated via the universal joint (1). In this case, one handrail (B) is fixed to a wall surface or the like. At the time of construction, for example, first, by tilting each end member (2A) (2B) of the universal joint (1) with respect to the intermediate member (3) in a plane including the second slit (221b), As shown in FIG. 8, the connection angle (X) between the handrails (B) viewed from the plane is adjusted to 90 °. Next, by tilting each end member (2A) (2B) with respect to the intermediate member (3) in a plane including the first slit (221a), the handrail viewed from the side as shown in FIG. (B) The connecting angle (X) between the two is adjusted to a required angle according to the inclination of the stairs. As described above, according to the universal joint (1), it is possible to easily connect the handrails of the rotating stairs, which is impossible with the conventional universal joint (81) shown in FIGS. is there.
[0019]
9 to 11 show a second embodiment of the present invention.
[0020]
In these figures, one end member (20A) of the universal joint for handrails of the second embodiment is shown. The end member (20A) has a slit in which the slit intersects the first slit (211a) extending linearly in the radial direction from the top of the convex spherical portion (21) in an L-shape with the top end of the first slit (211a). And a second slit (211c) extending linearly in the radial direction. The first slit (211a) and the second slit (211c) are formed so as to be substantially perpendicular to each other when viewed from the top side of the convex spherical portion (21) of the end member (20A). Both slits (211a) (211c) extend from the top of the convex spherical portion (21) of the end member (20A) to the center of the height, and have almost the same length. The other end member (20B) has the same configuration as the end member (20A). Other configurations are the same as those of the universal joint (1) of the first embodiment shown in FIGS.
[0021]
Even in the above universal joint, similarly to the universal joint (1) of the first embodiment shown in FIG. 1, both ends (20A) (20B) and the intermediate member (3) are aligned in a straight line. Can be used.
[0022]
Then, from the state corresponding to FIG. 1, for example, by tilting one end member (20A) in a direction parallel to the first slit (211a) with respect to the intermediate member, the end of the bolt becomes an end member (20A). 20A) along the first slit (211a) (see FIGS. 2 and 3). Thereby, the connection angle between the end member (20A) and the intermediate member can be appropriately adjusted in a plane including the first slit (211a).
[0023]
Alternatively, one end member (20A) is tilted in a direction parallel to the second slit (211c) with respect to the intermediate member from the state corresponding to FIG. Move along the second slit (211c). Thereby, the connection angle between the end member (20A) and the intermediate member can be appropriately adjusted in a plane including the second slit (211c).
[0024]
As described above, according to the universal joint of the above-described second embodiment, each end member (20A) is included in two planes each including the first slit (211a) and the second slit (211c) and forming a right angle with each other. It is possible to adjust the connection angle between (20B) and the intermediate member, and thus the connection angle between the two handrails.
[Brief description of the drawings]
FIG. 1 shows a first embodiment of the present invention, and is a partially cutaway front view of a universal joint for handrails.
FIG. 2 is a longitudinal sectional view showing a state where one end member of the universal joint of FIG. 1 is tilted.
FIG. 3 is a sectional view taken along line III-III in FIG. 2;
FIG. 4 is a perspective view showing an end member of the universal joint of FIG. 1;
FIG. 5 is a sectional view taken along the line VV of FIG. 4;
FIG. 6 is a sectional view taken along the line VI-VI in FIG. 4;
FIG. 7 is a front view showing a state where handrails are connected to each other using the universal joint of FIG. 1;
FIG. 8 is a plan view showing a state where handrails are connected to each other using the universal joint of FIG. 1;
FIG. 9 is a perspective view showing an end member of a universal joint for handrails, showing a second embodiment of the present invention.
FIG. 10 is a sectional view taken along line XX of FIG. 9;
FIG. 11 is a sectional view taken along line XX of FIG. 9;
FIG. 12 is a longitudinal sectional view showing a conventional universal joint for handrails.
FIG. 13 is a transverse sectional view taken along the line XIII-XIII of FIG.
[Explanation of symbols]
(B): Handrail (1): Handrail universal joint (2A) (2B): End member (20A) (20B): End member (21): Convex spherical part (211a): First slit (211b): First 2 slits (211c): second slit (3): intermediate member (31): concave spherical portion (32): central through hole (4): connecting shaft

Claims (2)

One end of each of the two handrails to be connected is fitted and fixed, and is disposed between a pair of cap-shaped end members having a convex spherical portion with a slit in the head, and the two end members; A ring-shaped intermediate member having concave spherical portions at both ends that receive the convex spherical portion slidably, and the both end members and the intermediate member are inserted through slits of both end members and the central through hole of the intermediate member so that the connecting angle can be adjusted freely. A universal joint for handrails with a connecting shaft
The slit of each end member comprises a first slit extending radially from the top of the convex spherical portion and a second slit extending circumferentially so as to intersect the terminal end of the first slit in a T-shape. A universal joint for handrails. One end of each of the two handrails to be connected is fitted and fixed, and is disposed between a pair of cap-shaped end members having a convex spherical portion with a slit in the head and two end members; A ring-shaped intermediate member having a concave spherical portion at both ends that receives the convex spherical portion slidably, and a slit of both end members and a central through hole of the intermediate member inserted through the both end members and the intermediate member so that the connecting angle can be adjusted freely. A universal joint for handrails with a connecting shaft
The slit of each end member includes a first slit extending radially from the top of the convex spherical portion, and a second slit extending radially so as to intersect the top end of the first slit in an L-shape. A universal joint for handrails.

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