JP3462845B2 - Handrail joint - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for a handrail provided on a stair, a corridor, a veranda, a road step, or the like, and more particularly, to a three-dimensional arrangement along a layout of a stair, a corridor, or the like. The present invention relates to a joint structure capable of freely connecting a joint portion of a handrail in a direction along the three-dimensional arrangement. [0002] Stairs, corridors, verandas, etc.
Handrails are provided for safety and guidance.In particular, recently there has been widespread demand for handrails from the viewpoint of barrier-free due to the desire to create a living environment in which a wide generation of people, regardless of public facilities and private residences, can spend time safely. It is rare. [0003] These handrails are provided continuously along the layout of stairs and corridors, but inside the building there are corridors and passages around the rooms and various facilities, and furthermore, there are entrances and exits with the outdoors and each level. There is going up and down stairs. For this reason, the layout of the passages connecting them is not only bent in a plane but also in a three-dimensional manner in which the handrail is also bent in a vertical direction. Become. Such a three-dimensionally bent handrail is formed by bending a long material manufactured by drawing or the like along these layouts, or separately manufacturing a joint portion bent in a direction along these layouts. And a method of connecting these long members. [0004] However, the process of bending these members, especially hollow long members in the predetermined direction while maintaining the cross-sectional shape, cannot be performed by on-site processing. It is not realistic considering the difficulty of dimensional adjustment in consideration of specifications and springback for each member. [0005] Therefore, in actual construction, a long material of a handrail in each direction cut by aligning the connection cross section of the connection portion is welded, and a method of finishing it by cutting a corner by a file operation, or a method of finishing in a predetermined direction. A method has been adopted in which a joint portion incorporating a universal joint that can be bent at a time is separately manufactured, and long members are connected to each other and assembled according to a layout. [0006] In the case of such a connection method by welding, it is possible to eliminate the need for special equipment on site, but it is not only difficult to work, but also the welding joint becomes a corner,
Since the radius R must be a sharp angle to some extent, a corner portion is protruded at each bent portion of the handrail, which is not preferable. In addition, in the case of the universal joint, it is possible to adjust to the bending along the three-dimensional path of the handrail, and there is an advantage that work can be performed without requiring special equipment on site,
The structure becomes complicated, and it is difficult to form a continuous and smooth form due to the structure of the joint part. Such a discontinuous structure and form of the handrail is not preferable from the viewpoint of barrier-free because it gives a sense of anxiety to the user, and various structures have been proposed to eliminate such a step of the joint. I have. For example, JP-A-11-93367,
JP-A-11-6267, JP-A-11-13244
Japanese Patent Application Laid-Open No. H10-133,087 and the like have devised to make the shapes of these bent portions smooth while making the structure of the universal joint the basic. Japanese Unexamined Patent Application Publication No. 11-93367 and Japanese Unexamined Patent Application Publication No.
As shown in FIG. 5, one end of each of a pair of fixing tools 51 connected to the handrail 50 is a convex spherical surface 52, and a connecting tool 55 having concave spherical surfaces on both sides is disposed therebetween to connect the convex spherical surfaces. Slot 56 that fits with the concave spherical surface of the tool and passes through the center of the convex spherical surface
These three members are connected by a pin 57, and the pin is slid along the long hole so that the pin can be bent between a pair of fixtures connected to the handrail. Although the structure to fit is described, the range in which the structure can be bent is limited, and the discontinuity on the outer diameter between the connecting tool and the fixing tool and the step between them exist along the handrail outer peripheral surface, It is unavoidable that a sense of incongruity accompanies use when traveling along the handrail. [0008] In Japanese Patent Application Laid-Open No. H11-13244, as shown in FIG. 6 (b), an end of a fixture 51 connected to a handrail 50 has a concave spherical surface and is disposed between the fixtures. The connecting tool 55 has convex spherical surfaces 58 on both sides, and the connecting tool has a cocoon shape in accordance with the curve of the handrail, and consideration has been given to making the outer periphery of the handrail bending portion a smooth curved surface. Therefore, the degree of bending is limited, and the step between the joints cannot be sufficiently eliminated due to these structures. As described above, even in the joint structure which can be bent in accordance with the bent portion of the handrail based on these universal joints, a smooth shape suitable for the degree of bending along the handrail layout can be obtained. It is difficult to connect the handrail by the method, and the structure cannot eliminate the step due to the thickness of the member where the member of the joint part is in contact, and the structure is complicated, so the cost is high and the spread is widespread. This is a difficult factor. [0010] In order to cope with such a problem, the present invention maintains the cross-sectional shape of a handrail such as a long pipe material, and follows a three-dimensional layout such as a staircase or a corridor. A handrail that can be connected in a free bending direction and has a smooth and continuous form with no step at the point where the members come into contact with the structure of the joint portion can be guided by hand and guided without fear. And a handrail joint structure comprising a universal joint is provided at low cost. A handrail joint structure according to the present invention comprises a pair of handrail joint members, each end of which is formed at an angle of approximately 45 degrees with respect to its longitudinal axis. A handrail joint provided with a circular joint surface having an equal diameter and rotatably coupled around an axis perpendicular to the joint surface, wherein a side that is an outer periphery of a bent portion of the joint member is the joint surface side. By making the spherical surface smoothly continuous with the edge, and narrowing the external shape on the opposite inner side and smoothly continuing to the joining surface side edge in the same manner, the contour of the bent portion as a continuous and smooth external shape, This is intended to prevent a user using the handrail from feeling uneasy or uncomfortable. FIG. 1 shows the bending mode of the handrail joint of the present invention.
FIG. 2 shows an exploded view thereof. As shown in FIG. 1, a handrail joint 10 of the present invention has a cylindrical shape having the same diameter as the handrail member at one end connected to the cylindrical handrail member, and includes members 11 and 12 having the same diameter. As shown in the exploded view 2, the other end where the members 11 and 12 are in contact with each other forms a joint surface 20 in a cross section at an angle of 45 degrees with the longitudinal axes A and B. Length of joint member and 4
The cross section forming an angle of 5 degrees is an ellipse, but this joint surface has a common center with the ellipse and is a circle having the same diameter as the joint member. For this reason, the joining surface contacts the ellipse in the minor axis direction of the ellipse and is inside the ellipse in the major axis direction, so the outer periphery of the handrail joint is continuous in the minor axis section and faces the joining surface in the major axis section. The shape is narrowed down. Therefore, 1
When a pair of joint members are combined at a right angle, the contour formed by the outer periphery of the bent portion is formed into a smooth spherical surface 25 (curved surface including the spherical surface), and at the inside of the bent portion, the edge of the joint surface is inside the outer shape of the joint member. Therefore, the outer shape 26 narrowed inward from the outer shape of the joint member has a shape connecting the outer shape of the joint member and the edge of the joint surface with a smooth curve. In the example of the figure, if the joining edge portion is made to have a shape continuous with the outer shape as it is, there is a possibility that a narrow gap is formed between the joint members and a child or the like may pinch a hand,
An appropriate step portion 21 is provided so as to leave a slight interval therebetween. At the center of the joint surface, a shaft hole 31 is formed perpendicularly to the joint surface (45 degrees with respect to the longitudinal axis), and the joint member joint shaft 30 is inserted so that the pair of joint members 11 and 12 are connected to the vertical shaft. It is rotatably connected around C. In order to make the handrail a layout bent at a right angle on a plane by this joint member, the joint members 11, 1
2 may be bent at a right angle as shown in FIGS. 1 (a) and 1 (b). The outer periphery of the joint member forms a smooth curved surface 25, and the inner side of the bent portion has a shape 26 constricted slightly inward. However, when using the handrail, the outer peripheral side that touches the hand or body is a curved surface, so that a sense of discomfort occurs. There is no feeling of uneasiness because there is no shape and the inside does not catch on the hand. When this joint member is used to extend linearly on a plane, as shown in FIGS. 1 (c) and (d), there are some steps, but since it is continuous on a smooth curved surface, it may be caught or uncomfortable. There is no. Further, when a layout having a step or an inclination in a vertical direction from a plane is used, when bending is performed even on the same plane, or when a handrail is laid in a three-dimensional layout in which these are combined, It can be easily dealt with by rotating the vertical axis C at an appropriate angle. That is, the handrail member 12 is different from the handrail member 11 in that
The longitudinal axis B can rotate around the axis C while drawing a conical shape at an angle of 45 degrees with respect to the axis C. When attaching the handrail member, the handrail member 12 becomes the handrail member 11.
Can be rotated 360 degrees around the longitudinal axis A of Therefore, in the case of a layout that bends in a plane parallel to the plane of the paper, the bending angle is adjusted by the rotation of the handrail member 12 about the axis C. The rotation can be adjusted by rotating the shaft 11 around the axis A. Therefore, the angle of the bend only in the plane can be obtained by rotating the handrail member 12 about the axis C, and then rotating the handrail member 12 about the axis A of the handrail member 11 to return the plane to the plane. In the above example, the cross-section of the joint structure is circular, and in the case of a circular cross-section, the outer shape of the joint can be most smoothly formed. The cross section of the portion does not need to be circular, and may have any shape according to design requirements and various needs. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific structures and embodiments of a handrail joint structure according to the present invention will be described with reference to the drawings. FIG. 3 shows an example in which two pairs of handrail joints of the present invention are used to arrange handrails along a layout bent in a crank shape in a plane, and shows the outer diameter and cross section of a handrail member without handrails. Such a layout is a place that we often experience everyday, but if the handrail is located on a staircase and the layout has a three-dimensional vertical step, rotate the joint member around its rotation axis. This can be dealt with by forming a predetermined angle in the vertical direction. In these examples, an opening 35 through which a joint shaft (pin) serving as a rotation axis for coupling the joint member is inserted is formed on the back surface of the joint member. With preformed sealing members and fillers,
It is finished smoothly and has a smooth outer shape. Further, since the handrail joint of the present invention can be freely bent and set for a three-dimensional handrail layout at any angle, work such as assembling a handrail member at a construction site is not necessary. Finishing can be performed before shipment from the factory. For the same reason, it is not necessary to use a joint structure that can be assembled at the construction site. For example, members that serve as shafts and bearings are incorporated into both joint members, and these members are prevented from coming off by engaging means. By adopting the latch mechanism, the joint member can be made to have a smooth outer shape without the opening 35 for the screw hole and the like. By doing so, a more simple and robust structure can be obtained. Since the handrail joint of the present invention has a simple structure, it can be applied to materials such as engineering plastics, which can be easily molded, and can be easily manufactured from various metal materials. The material can be appropriately selected from these materials in consideration of the balance with the material and the like and familiarity. 4 and 5 show layout examples in which a handrail is laid using the handrail member of the present invention. FIG. 4 shows an example in which the corners of the handrails arranged in the corridor are used at the bent portions of the handrails. These corners can be formed smoothly even at the protruding parts of the handrails, such as the start and end of the handrails. And have no anxiety. The example of FIG. 5 shows a simple L-shaped arrangement from the stairs through the landing to the stairs, but shows a smooth connection to the three-dimensional bending along the slope of the stairs following the horizontal part of the landing. . The handrail joint structure of the present invention can cope with the connection of handrails at bent portions of any layout required in a handrail installation environment. Moreover, no special processing or contrivance is required in actual construction, and the structure can be used as it is when shipped from the factory. In addition, since it has a simple structure, is easy to process, and can be formed of various materials such as plastic and metal, the structure can be inexpensive and robust. Even in an environment where a handrail is installed, the bent portion of the handrail has a smooth outer shape and has no steps or discontinuous portions. It is suitable for creating a barrier-free environment.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a principle diagram for adjusting a connection angle of a handrail joint of the present invention. FIG. 2 is an exploded view of the same. FIG. 3 is a handrail joint of the present invention: outer shape (a), cross-section (b). FIG. 4 is a plan layout example of the handrail joint of the present invention. FIG. 5 is an example of an L-shaped staircase layout of the handrail joint of the present invention. FIG. 6 shows an example of a conventional handrail joint, a spherical joint (a), and a cocoon joint (b). [Description of Signs] 10: Handrail joints 11 and 12: Handrail joint member 20: Joint surface 21: Joint surface edge step 25: Joint member outer peripheral curved surface 26: Joint member inner constriction 30: Joint member joint shaft 31: Shaft hole 35: Opening 50: Handrail 51: Handrail joint member (conventional example) 55: Connecting tool 52: Convex spherical surface 56: Long hole 57: Pin 58: Cocoon-shaped convex spherical surface A, B: Joint member longitudinal axis C: Joint member joint Axis

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04F 11/18

Claims (1)

(57) [Claims 1] A handrail joint member, each end of which is formed at an angle of approximately 45 degrees with respect to its longitudinal axis.
A handrail joint provided with a circular joint surface having the same diameter as the joint member and rotatably coupled about an axis perpendicular to the joint surface, wherein a side that is an outer periphery of a bent portion of the handrail joint is provided. A handrail joint characterized by a spherical surface that is smoothly continuous with the joint surface, the outer shape of the opposite inside surface being constricted, and a smooth continuous surface with the side edge of the joint surface.