JP2011127380A - Joint for construction of handrail, and handrail - Google Patents

Abstract

A joint suitable for construction of a handrail installed indoors or outdoors, in particular, a handrail using a tubular handrail material, and a handrail constructed using the joint are provided.
One coupling tube portion for closely fitting a hollow portion 2a of a tubular handrail material 2 is protruded from a joint base portion 3 having the same diameter and the same shape as the outer diameter of a tubular handrail material 2, and a joint base portion. 3 and the connecting cylinder portion 4 are formed in a vertical step portion 5, and a fixing plate 6, in which the inner side surface 6 a is circumscribed on the outer surface of the tubular handrail 2 and protrudes in the same direction from the joint base portion 3, is a piece. The tubular handrail material 2 formed as a holding plate and provided with a fixing hole 7 in the fixing plate 6 and externally fitted to the connecting cylinder portion 4 is fixed by a fixing tool 8 using the fixing hole 7 of the fixing plate 6. Is done.
[Selection] Figure 1

Description

  The present invention relates to joints of various forms and functions suitable for construction of handrails installed indoors and outdoors, in particular, handrails using tubular handrails, and handrails constructed using the joints. Belongs to the technical field.

  Recently, along with approaches to indoor corridors and stairs or outdoor entrances, for example, handrails such as those illustrated in FIG. Yes. When installing the handrail shown in FIG. 1, the handrail members are linearly connected to each other on the basis of the connection between the support column 1 and the handrail material 2 for the construction of the handrail, as indicated in FIGS. A wide variety of joints are required for connection, connection in an inclined state, connection for change of direction, etc., and joints having various forms and functions have been proposed and put into practical use.

For example, in Patent Document 1 below, a pillar anchor of a hollow structure used for construction of a handrail installed on the peripheral edge of a building roof or on the peripheral edge of a veranda is embedded in a pillar anchor embedded in the foundation concrete. A joint structure that is placed on top and fixed by screws is disclosed. In the case of this joint, a screw hole is provided in advance in a corresponding position where both the handrail support column and the column anchor are closely aligned, and a screw is inserted into the screw hole from the outside of the handrail support column placed on the column anchor. It is structured to be screwed and joined.
However, when this type of joint is used, it is necessary to provide a screw hole in advance in the corresponding position of both members to be joined, which requires time and effort for drilling and threading. In addition, when a screw is screwed into the screw hole and joined, the screw head is always exposed to the outside, the design appearance is impaired, and the user's body and various items are hit and damaged by the exposed screw head. Concern has been pointed out as a problem.

Next, in the connection structure of the handrail material described in FIG. 3 of the following Patent Document 2, the disk-shaped connection member applied to the end surface portion of the handrail material is screwed and fixed to the end surface. To do. The disk-shaped connecting member is formed with an outer diameter whose outer peripheral edge protrudes slightly from the outer diameter surface of the handrail material, and the outer peripheral edge portion is a thin connection projecting radially in four orthogonal directions And an elastic portion extending like a shade in the circumferential direction around the connecting portion. The disk-shaped connecting member configured as described above is forcibly pushed into the connecting space of the joint member integrally with the handrail material. Thus, it is described that the handrail material achieves an integral connection with the joint by the elastic action of the cap-shaped elastic portion formed on the outer peripheral portion of the disk-shaped connecting member.
In the case of this connection structure, it is recognized that the set screw does not appear in the appearance and, of course, the screw head is not exposed. However, there is a difference in thickness corresponding to the thickness between the outer diameter of the handrail material and the outer diameter of the joint member that is fitted into the connecting space to be connected. For the user who walks, there is a problem that the existence of the step becomes a hindrance to walking, and the feeling of use is greatly impaired.

  Next, the connecting device disclosed in the following Patent Document 3 connects a solid or hollow handrail material or the like, and is recognized as a configuration in which a step does not occur at the joint between the joint and the handrail material. However, since the set screw is still exposed on the exterior, and the number of parts that make up the connecting device is large, the management is cumbersome and a lot of work is required for the connecting work. It is recognized that

JP-A-11-270092 JP 2005-126899 A Utility Model Registration No. 3080637

  As illustrated in FIG. 1, the construction of a handrail requires joints (i) to (i) having various forms and functions. Moreover, it is desired that the joint be capable of constructing a handrail having strength, rigidity, and stability that can be rested even when an elderly person or a person requiring care is grabbed and walked. Moreover, the outer diameter of the joint is equal to the outer diameter of the handrail material, there is no level difference that the user's hand or body slides along the handrail material, the feel is good, and the number of parts is small, It is easy to drill holes for fixing using fixing tools such as screws, and the structure is such that the head of the set screw is not exposed to the place where the user's body or clothing hits, and the design appearance is also excellent. Something is desired.

Accordingly, an object of the present invention is to provide a joint having the form and function necessary for construction of a handrail, and has the strength and stability that can be used even when elderly people or care recipients grab and walk. It is to provide a joint capable of constructing a handrail.
The next object of the present invention is that the outer diameter of the joint is equal to the outer diameter of the handrail material, and does not generate a step where the user's hand or body hits the boundary between the two, and the touch feeling is good, The number of component parts is small, the drilling of fixing holes using fixing tools such as screws is easy, the head of the fixing tools is not exposed to the line of sight, and a handrail that is easy to use and comfortable to use can be constructed. It is to provide a joint.

As a means for solving the above problems, a joint for constructing a handrail according to the invention described in claim 1 is:
At least one connecting cylinder portion 4 for closely fitting the hollow portion 2 a of the tubular handrail material 2 is protruded from the joint base portion 3 having the same diameter and the same shape as the outer diameter of the tubular handrail material 2, and is connected to the joint base portion 3. The boundary with the cylinder part 4 is formed in a vertical step part 5 against which the tip part of the tubular handrail 2 abuts.
A fixing plate 6 that circumscribes the outer surface of the tubular handrail material 2 in which the inner side surface 6a is closely fitted to the connecting cylinder part 4 from the joint base 3 and protrudes in the same direction as the connecting cylinder part 4 is In order to fix the tubular handrail material 2 which is formed as a cantilever plate having a thickness and a certain width sufficient to fix the handrail material 2 and is externally fitted to the connecting cylinder portion 4 to the fixing plate 6 with a fixing tool 8. Fixing holes 7 are provided,
The tubular handrail 2 that is externally fitted to the connecting cylinder 4 is fixed and connected by a fixing tool 8 that uses the fixing hole 7 of the fixing plate 6.

The invention described in claim 2 is a joint for constructing a handrail described in claim 1,
One connecting cylindrical portion 4 protrudes in the horizontal direction from one end of the joint base 3, and the fixing plate 6 also extends in the same direction along the lower surface of the connecting cylindrical portion 4 from the same end of the joint base 3. The fixing plate 6 is provided with at least one fixing hole 7 for fixing the tubular handrail material 2 externally fitted to the connecting cylinder portion 4 with a fixing tool 8.
At the opposite end of the joint base 3, a connecting portion 9 of the support column 1 protrudes in the vertical downward direction,
The column connecting portion 9 is connected to the upper end of the column 1, the tubular handrail material 2 is externally fitted to the connecting cylinder portion 4 in the horizontal direction, and fixed by a fixing tool 8 using the fixing hole 7 of the fixing plate 6. And connecting them.

The invention described in claim 3 is a joint for constructing a handrail described in claim 1,
Two connecting cylinders 4, 4 are projected from both ends of the joint base 3, and the fixing plate 6 is also projected from the joint base 3 along the connecting cylinder 4 in the same direction. At least one fixing hole 7 for fixing the tubular handrail material 2 externally fitted to the connecting cylinder portion 4 with the fixing tool 8 is provided,
A tubular handrail material 2 is externally fitted to each of the two connecting cylinder portions 4 and is fixed and connected by a fixing tool 8 using a fixing hole 7 of the fixing plate 6. .

According to a fourth aspect of the present invention, in the joint for constructing a handrail according to the first aspect,
Two coupling cylinders 4 and 4 are projected from the joint base 3 in a linear arrangement, and the fixing plate 6 is also projected from the coupling base 3 along the lower surface of the coupling cylinder 4 in the same direction. 6, at least one fixing hole 7 is provided for fixing the tubular handrail 2 externally fitted to the connecting cylinder portion 4 with a fixing tool 8, and a hinge piece 10 is provided on the lower surface portion of the joint base 3. Protruding downwards,
On the other hand, a hinge piece 11 is formed upward at the upper end of the column connecting portion 9 arranged vertically downward, and the hinge mechanism in which the hinge piece 11 and the hinge piece 10 on the lower surface of the joint base 3 are connected by a pin 12. The joint base 3 is tiltably coupled to the column coupling 9 by
The tubular handrail material 2 is connected to each of the two connecting cylinders 4 and 4 in a linear arrangement, and the support connecting part 9 is connected to the upper end of the support 1.

The invention described in claim 5 is a joint for constructing a handrail described in claim 1,
One connecting tube portion 4 protrudes from one end of the joint base 3, and the fixing plate 6 protrudes from the joint base 3 along the lower surface of the connecting tube portion 4 in the same direction. Is provided with at least one fixing hole 7 for fixing the tubular handrail 2 externally fitted to the connecting cylinder portion 4 with a fixing tool 8, and at the opposite end of the joint base 3 a hinge piece 10 ′ or 10 "is projected,
The two joint bases 3 and 3 having the above-described configuration are connected to each other in a freely tiltable manner by a hinge mechanism in which the hinge pieces 10 'and 10 "are connected by overlapping pins 12.
The tubular handrail material 2 is fitted on each of the two connecting tube portions 4 and 4 and fixed and connected by a fixing tool 8 using a fixing hole 7 of the fixing plate 6. To do.

The invention described in claim 6 is the joint for constructing the handrail described in claim 1,
One connecting tube portion 4 protrudes from one end of the joint base 3, and the fixing plate 6 protrudes from the joint base 3 along the lower surface of the connecting tube portion 4 in the same direction. Is provided with at least one fixing hole 7 for fixing the tubular handrail member 2 externally fitted to the connecting cylinder portion 4 with a fixing tool 8, and at the opposite end of the joint base 3 for forming a hinge. Spheroid 15 is projected,
On the other hand, a plurality of spherical concave surfaces 16 into which the spherical body 15 for forming the hinge of the joint base 3 is rotatably fitted are provided at the upper end of the column connecting portion 9 which is arranged vertically downward. A base 17 is provided,
The joint base 3 and the column connection part 9 are freely connected by a hinge mechanism in which the hinge-forming spherical body 15 of the joint base 3 is rotatably connected to the spherical concave surface 16 of the hinge base 17.
The column connecting portion 9 is connected to the upper end portion of the column 1, and the end portion of the tubular handrail material 2 is connected to each connecting cylinder portion 4 of each joint base 3.

The invention described in claim 7 is a joint for constructing a handrail according to any one of claims 1 to 6,
The inner side surface 6a of the fixing plate 6 protruding in the same direction along the connecting cylinder portion 4 of the joint base 3 has a curved surface shape substantially similar to the outer diameter surface of the tubular handrail material 2, and the fixing plate 6 is It is formed as a cantilever plate having a width dimension equal to or less than the lower half of the outer diameter of the tubular handrail material 2.
The invention described in claim 8 is a joint for constructing a handrail according to any one of claims 1 to 7,
The coupling cylinder portion 4 of the joint base portion 3 has a notch in which a portion facing the fixing plate 6 protruding in the same direction along the outer diameter surface thereof is cut out with a width dimension approximate to the width dimension of the fixing plate 6. It is formed in the cylinder shape which has the part 40, It is characterized by the above-mentioned.

The handrail according to the invention described in claim 9 is:
A handrail constructed by connecting the column 1 and the tubular handrail material 2 and the tubular handrail materials 2 and 2 in combination using the joint for constructing the handrail described in claim 1,
Each of the handrail construction joints is characterized in that it is constructed by unifying the position of the fixing plate 6 so as to be arranged downward toward the ground side.

The joint for constructing the handrail according to the invention described in claims 1 to 8 is such that the hollow portion 2a of the tubular handrail 2 is closely removed from the joint base 3 having the same diameter and the same shape as the tubular handrail 2. At least one connecting cylinder part 4 to be fitted is projected, and the boundary between the joint base part 3 and the connecting cylinder part 4 is formed in a vertical step part 5 against which the tip of the tubular handrail 2 abuts. The tubular handrail 2 that is externally fitted and connected to the connecting cylinder portion 4 struck the vertical step portion 5 to form one joint line, and has the same shape and the same size as the joint base portion 3. Presents a continuous connection structure. Therefore, the handrail of the smart design without the level | step difference which stops the user's hand and body slipping to the tubular handrail material 2 and walking can be constructed. In addition, it is possible to construct handrails that give a smooth hand feeling and a pleasant feel to the user, and provide a user-friendly handrail.
Next, the tubular handrail material 2 that is externally fitted and connected to the connecting cylinder portion 4 is protruded from the same joint base portion 3 and is bound to the outer surface of the tubular handrail material 2 so as to be bound and fixed. The fixing screw 8 using the fixing hole 7 of the plate 6 or the fixing action by a fixing tool such as a rivet achieves a sufficiently and sufficiently strong connection, and provides the necessary strength, rigidity and stability for use of the handrail. Secured construction can be achieved.

In addition, the handrail construction joint according to the present invention is basically for connecting the hollow portion 2a of the tubular handrail material 2 closely and externally from the joint base portion 3 having the same diameter and the same shape as the tubular handrail material 2. The cylindrical portion 4 is projected, and further constituted simply by a fixing plate 6 protruding in the same direction along the connecting cylindrical portion 4 from the same joint base 3, and a fixing tool such as a fixing screw 8 or a rivet, The number of parts is small. In addition, if the fixture is removed, it is suitable for mass production as an aluminum die-cast product or a synthetic resin injection-molded product, and can be provided at low cost. In particular, the fixing hole 7 of the fixing plate 6 can be formed at a time during die-casting or injection molding, and it is troublesome to drill into the joint base 3 and the tubular handrail 2 having a circular cross section where it is difficult to position the tip of the drilling drill. Compared to the difficulty, the processing effort and the processing cost can be significantly reduced. For example, when the tubular handrail material 2 is fixed using a self-tapping screw as the fixing screw 8, the fixing screw 8 is passed through the fixing hole 7 of the fixing plate 6, and the tubular handrail material 2 is directly used by using the fixing hole 7 as a guide hole. Because it can be screwed in a stable state and posture, fixing work can be done easily and quickly.
Moreover, the handrail construction joint according to the present invention is a joint of various forms and functions according to claims 2 to 8, wherein the shape and function are modified and applied with the invention according to claim 1 as a basic configuration. Can be prepared in various ways, and various forms and functions of joints required for the construction of handrails can be provided to contribute to the construction of handrails.

  Furthermore, since the handrail according to the invention described in claim 9 is constructed using the various joints described in claims 1 to 8, the appearance design of the constructed handrail is determined by the connecting cylinder portion. Since the tubular handrail material 2 that is externally fitted and connected to 4 has the same shape, the same size, and is continuously connected to the vertical stepped portion 5 so as to form one joint line. Give a simple and smart aesthetic. In addition, each of the fixing plates 6 of each joint protrudes in the same direction along the lower surface of the connecting cylinder portion 4, and more specifically, is used in an arrangement facing the ground side. The presence of the fixture using the fixing hole 7 of the fixing plate 6 is also hidden from the eyes of the person. You can build a slide. And the head of the fixing tool by the fixing screw 8 or the rivet can construct a safe handrail without worrying that the body or clothes of the handrail user will be caught.

It is the elevation which showed an example of the handrail constructed | assembled using the coupling of this invention. FIGS. 1A and 1B are a perspective view and a vertical sectional view showing an embodiment of a joint indicated by a circle (A) in FIG. FIGS. 1A to 1D are a top perspective view, a bottom perspective view, a side view, and a cross-sectional view showing an embodiment of a joint indicated by a circle (B) in FIG. FIGS. 1A to 1C are joints indicated by circles (B) in FIG. 1, and are a top side perspective view, a bottom side perspective view, and a side view showing an example of a bent joint. FIGS. 3A to 3D are a cross-sectional view, a front view of a horizontal posture, a side view, and a bottom view showing an embodiment of a universal joint indicated by a circle (c) in FIG. 1 in an inclined posture; FIGS. 1A to 1C are a cross-sectional view, a right side view, and a plan view showing an embodiment of a universal joint indicated by a circle (d) in FIG. 1. FIGS. 1A to 1D show different embodiments of the universal joint indicated by a circle (C) in FIG. 1, a front view and a left side view in which the right joint base is tilted downward, and a right joint base in the rear direction. FIG. 5 is a plan view inclined to the right and a bottom view showing the left and right joint bases in a horizontal posture. FIGS. 5A to 5D are cross-sectional views showing different application examples of the fixing means using the joint fixture according to the present invention. FIGS.

The joint for constructing a handrail according to the present invention has a connecting cylinder portion 4 for closely fitting the hollow portion 2a of the tubular handrail material 2 from the joint base portion 3 having the same diameter and the same diameter as the tubular handrail material 2. At least one piece is protruded, and the boundary between the joint base portion 3 and the connecting cylinder portion 4 is formed in a vertical step portion 5 against which the distal end portion of the tubular handrail material 2 abuts.
From the joint base 3, a fixing plate 6 that circumscribes the outer surface of the tubular handrail material 2 in which the inner side surface 6 a is closely fitted to the connecting cylinder part 4 protrudes in the same direction as the connecting cylinder part 4. The fixing plate 6 is formed as a cantilever plate having a thickness and a certain width sufficient to fix the tubular handrail material 2, and the tubular handrail material 2 externally fitted to the connecting cylinder portion 4 is fixed to the fixing plate 6. At least one fixing hole 7 for fixing with is provided.
Therefore, the tubular handrail material 2 externally fitted to the connecting cylinder portion 4 is fixed by a fixing tool such as a fixing screw 8 or a rivet using the fixing hole 7 of the fixing plate 6 to achieve the purpose of connection.
The cross-sectional shapes of the joint base 3 and the connecting cylinder 4 are generally circular, but are not limited thereto. An elliptical shape, a rectangular tube shape, a polygonal tube shape, etc. can be implemented in exactly the same manner.
The tubular handrail material 2 may be any of a metal tube, a synthetic resin tube, or a resin-coated adhesive steel tube in which a synthetic resin is coated and bonded to the outer peripheral surface of the steel tube. In addition, it is basically assumed that the tubular material is hollow over the entire length. However, in some cases, a solid body in which only a portion that closely fits to the connecting tube portion 4 of the joint according to the present invention is formed into a tubular body. This can also be carried out in exactly the same manner with the rod-shaped material.

The handrail construction joint according to the present invention, as in the invention described in claim 2, has one connecting cylinder part 4 protruding in the horizontal direction from one end of the joint base part 3, and the fixing plate 6 is also a joint. For fixing the tubular handrail material 2 that is protruded from the base 3 in the same direction along the lower surface of the connecting cylinder 4 and is externally fitted to the fixing cylinder 6 with the fixing tool 6. At least one hole 7 is provided, and an L-type (or elbow-type) configuration in which a connecting portion 9 to the support column 1 protrudes in a vertically downward direction at the opposite end of the joint base 3 is also implemented. Is done.
That is, the connecting portion 9 to the support column is connected to the upper end of the support column 1, the tubular handrail material 2 is externally fitted to the connecting cylinder portion 4 in the horizontal direction, and fixing using the fixing hole 7 of the fixing plate 6 is performed. It can be carried out in a configuration in which it is fixed and connected with tools.
Incidentally, the structure of the support | pillar connection part 9 is implemented by the short socket shape which fits the support | pillar 1 outside, or the hollow socket shape which fits the support | pillar 1 internally. Moreover, after connecting the support | pillar connection part 9 to the upper end of the support | pillar 1, what kind of fixing means is employ | adopted implements by selecting well-known and well-known fixing means suitably according to an external fitting type or an internal fitting type. .

  Further, as in the invention described in claim 3, two connecting cylinder portions 4, 4 are projected from both ends of the joint base 3, and the fixing plate 6 is also connected to each of the connecting cylinder portions 4 from the joint base 3. At least one fixing hole 7 is provided for fixing the tubular handrail material 2 which is protruded in the same direction along the lower surface of each of the fixing plates 6 and externally fitted to the connecting cylinder portion 4 with a fixing tool, The tubular handrail material 2 is externally fitted to each of the connecting tube portions 4 and fixed with a fixing tool using the fixing hole 7 of each fixing plate 6 to achieve the purpose of connection.

Further, as in the invention described in claim 4, the two connecting cylinders 4, 4 protrude from the joint base 3 in a linear arrangement, and the fixing plate 6 also extends from the joint base 3 to the bottom surface of the connecting cylinder 4. The fixing plate 6 is provided with at least one fixing hole 7 for fixing the tubular handrail material 2 externally fitted to the connecting cylinder portion 4 with a fixing tool. Further, the hinge piece 10 is protruded downward on the lower surface portion of the joint base 3,
On the other hand, a hinge piece 11 is also formed upward at the upper end of the column connecting portion 9 arranged vertically downward, and the hinge piece 11 and the hinge piece 10 on the lower surface portion of the joint base 3 are connected by a pin 12. By the mechanism, the joint base 3 is tiltably connected to the column connecting part 9,
Two tubular handrails 2 can be connected to the two connecting cylinders 4 and 4 in a linear arrangement, and the support connecting part 9 can be connected to the upper end of the support 1.

Further, as in the invention described in claim 5, one connecting cylinder portion 4 protrudes from one end portion of the joint base portion 3, and the fixing plate 6 also extends from the joint base portion 3 to the lower surface of the connecting cylinder portion 4. The fixing plate 6 is provided with at least one fixing hole 7 for fixing the tubular handrail 2 externally fitted to the connecting cylinder portion 4 with a fixing tool. A hinge piece 10 or 10 'is projected at the opposite end of the base 3, and
The two joint bases 3 and 3 having the above-described structure are connected to each of the two connecting cylinders 4 and 4 by a hinge mechanism in which the hinge pieces 10 and 10 'are connected by overlapping pins 12 to be freely tilted. The present invention is also implemented in a configuration in which the tubular handrail material 2 is connected.

As in the invention described in claim 6, one connecting cylinder portion 4 protrudes from one side end portion of one joint base portion 3, and the fixing plate 6 also extends from the joint base portion 3 to the connecting cylinder portion 4. One protruding in the same direction along the lower surface, the fixing plate 6 is provided with at least one fixing hole 7 for fixing the tubular handrail material 2 externally fitted to the connecting cylinder portion 4 with a fixing tool, The opposite end of the joint base 3 has a configuration in which a spherical body 15 for forming a hinge protrudes,
On the other hand, a plurality of spherical concave surfaces 16 into which the spherical body 15 for forming the hinge of the joint base 3 is rotatably fitted are provided at the upper end of the column connecting portion 9 which is arranged vertically downward. A base 17 is provided,
A joint is constructed in which the hinge-forming spherical body 15 of the joint base 3 is rotatably connected to the spherical concave surface 16 of the hinge base 17 to freely connect the joint base 3 and the column connection part 9;
The structure in which the support pillar connecting portion 9 is connected to the upper end portion of the support pillar 1 and the end portion of the tubular handrail 2 is connected to each connecting cylinder portion 4 is also implemented.

In the handrail construction joint according to the present invention, the inner surface of the fixing plate 6 protruding in the same direction along the connecting cylinder portion 4 has a curved surface shape substantially similar to the outer diameter surface of the tubular handrail material 2. In addition, the fixing plate 6 is formed as a cantilever plate having a width dimension equal to or less than the lower half of the outer diameter of the tubular handrail material 2.
Further, the connecting cylinder part 4 has a notch 40 obtained by cutting a part facing the fixing plate 6 protruding in the same direction along the outer diameter surface thereof with a width dimension approximate to the width dimension of the fixing plate 6. It can also be formed and formed into a cylindrical shape.

  Of course, as in the invention described in claim 9, tubular handrail materials 2 are connected to each other by using various types of joints for constructing handrails described in claims 1 to 8 and combined. A handrail can be constructed by connecting the handrail 2 and the support 1. In that case, the position of the fixing plate 6 in each handrail construction joint can be implemented with a configuration in which all are arranged downwardly toward the ground side.

Hereinafter, the present invention will be described based on illustrated embodiments.
First, FIG. 2 shows an embodiment of a handrail construction joint indicated by a circle (a) in FIG. 1, and more specifically, an embodiment according to the inventions of claims 1 and 2 is shown. Yes.
The illustrated joint is an example of a so-called elbow joint that connects a vertical support column 1 and one end of a tubular handrail 2 arranged in the horizontal direction, and has the same diameter as the outer diameter of the tubular handrail 2. A tubular joint base 3 having the same shape and curved into an L-shape of about 90 ° is the center. From the horizontal lateral end on the upper side of the joint base 3, one connecting cylinder part 4 having an outer diameter capable of closely fitting the hollow part 2a of the tubular handrail 2 is projected. A boundary portion between the base portion 3 and the connecting cylinder portion 4 is formed in a vertical step portion 5 where the distal end portion of the tubular handrail material 2 abuts closely.

Further, from the same horizontal side end on the same upper side of the joint base 3, the fixing plate 6 is sandwiched by circumscribing the outer surface of the tubular handrail material 2 in which the inner surface 6 a is closely fitted to the connecting cylinder portion 4. However, one piece is projected in the same direction along the lower surface of the connecting cylinder part 4 in the same direction. As shown in FIG. 2 b, a fixing tool such as a fixing screw or a rivet (see FIGS. 8 a to d) for fixing the tubular handrail material 2 externally fitted to the connecting cylinder portion 4 is applied to the fixing plate 6. Two holes 7 (but not limited to two) are provided at an appropriate interval. The fixing hole 7 is provided as a so-called through hole having an inner diameter through which a fixing screw or a rivet as a fixing tool can be passed. The fixing plate 6 is formed as a cantilever plate having a thickness and a width dimension that exhibits strength and rigidity necessary and sufficient for fixing the tubular handrail material 2 that is closely fitted to the connecting cylinder portion 4. ing.
Incidentally, the outer diameter of the tubular handrail 2 applied to the joint of the present embodiment is about 32 mm to 42 mm as an example, and the inner diameter is about 30 mm to 40 mm. Therefore, the outer diameter of the connecting cylinder portion 4 is smaller than the fitting tolerance by 30 mm or more than 30 mm or 40 mm, and the protruding length is manufactured to about 40 mm. The joint base portion 3 and the connecting cylinder portion 4 having a hollow structure are manufactured in an integral hollow structure. The inner diameter of the connecting cylinder portion 4 is not limited to the strength necessary for supporting and fixing the tubular handrail material 2. Designed to meet the rigidity. The connecting cylinder portion 4 shown in FIG. 2 b is formed in a conical shape that gradually increases in thickness from the tip toward the base joint base portion 3. This is because it is preferable in terms of saving the amount of material used and ensuring the draft angle of the core that forms the hollow portion during die casting or injection molding. Since this point is a matter common to each embodiment described below, in the following description of each embodiment, it is added that repeated description is omitted unless particularly necessary.

Further, the description of the configuration related to the fixed plate 6 will be continued. As is apparent with reference to FIGS. 2 a and 3 c, the fixing plate 6 protruding in the same direction along the lower surface of the connecting cylinder part 4 has a tubular shape whose inner side surface 6 a is externally fitted to the connecting cylinder part 4. It is formed in a circular arc concave shape that is substantially similar to the outer diameter surface of the connecting cylinder portion 4 so as to substantially circumscribe the outer diameter surface of the handrail material 2. Moreover, as described above, the tubular handrail material 2 is configured as a cantilever plate having a thickness and a width dimension W that exhibit strength and rigidity necessary and sufficient for sandwiching and fixing the tubular handrail material 2 with the connecting cylinder portion 4. Incidentally, the thickness of the fixing plate 6 shown in FIG. 2b is formed to have a uniform thickness of about 3 mm on the assumption of the dimensional specifications of the tubular handrail 2 described above. However, it is also preferable to form a thicker shape from the tip toward the base joint base 3.
Moreover, in order to ensure the ease of use of the constructed handrail and the good design of the appearance, the width dimension W of the fixing plate 6 is less than the lower half of the outer half of the outer diameter of the tubular handrail material 2, preferably Is a cantilever plate having a width dimension equivalent to about 60 ° in terms of an arc angle in order to hide from the eyes of the surrounding people and to be as unobtrusive as to be grasped by the hand of a user who is grabbed by the handrail and walks It is preferable to form as. However, the width is not limited to a certain width, and it is also preferable that the width of the fixing plate 6 is formed so as to gradually widen from the tip toward the base joint base 3 (the invention of claim 7).

  Next, as is apparent from FIG. 2a, the connecting cylinder 4 in the illustrated example is not a complete closed cross section (circular), and specifically protrudes in the same direction along the lower surface of the connecting cylinder 4. The portion facing the fixed plate 6 is formed in a cylindrical shape having a cutout portion 40 having a shape obtained by cutting out a portion having a width approximate to the width of the fixed plate 6. The technical significance is that even if the connecting cylinder part 4 is formed in a cylindrical shape having the notch part 40, there is no adverse effect on the support, fixing action and ability of the tubular handrail material 2, and conversely the notch It is more convenient to form the tube 40 having the portion 40 because the fitting operation of the tubular handrail 2 is easier, and the core structure of the mold at the time of die casting or injection molding is simplified. This is because the amount of material can be saved, and so on. The above configuration is also a matter common to each embodiment described below. However, in the description of each embodiment below, it is added that it is omitted to repeat the description unless there is a special need ( The invention according to claim 8).

Next, at the end of the joint base 3 opposite to the end from which the connecting cylinder portion 4 is projected, the connecting portion 9 to the support column 1 is in the vertically downward direction. As shown to 2b, it protrudes in the hollow socket structure which inserts the support | pillar 1 internally. The inner diameter of the hollow portion of the connecting portion 9 is configured to fit to the support column 1 and is large by a tolerance. On the outer peripheral surface of the column connecting portion 9 is a position in a plane that includes the center line of the connecting portion 9 and the connecting cylinder portion 4 in common, and the position of the inner corner connected in series with the fixing plate 6 described above. In addition, a similar thick protrusion 91 is integrally formed. In the protrusion 91, two fixing holes 91 and 91 for applying a fixing tool such as a fixing screw or a rivet in the case of FIG. 2a (but not limited to two) are provided. Yes.
That is, as shown in FIG. 2b, at the stage where the upper end portion of the support column 1 is fitted into the support column connection portion 9 formed in a hollow socket structure, the two fixing holes 91 and 91 of the protrusion 90 are respectively inserted. The joint can be firmly attached and fixed to the upper end of the column 1 by passing through a fixing tool such as a fixing screw or a rivet and fixing it to the column 1. Of course, the structure of the column connecting portion 9 is not the socket type having the hollow structure shown in the figure, but can be implemented by forming a short column structure that is fitted into the hollow portion of the column having the hollow structure. In that case, a fixing hole will be provided in the column.

  In addition, like the embodiment shown in FIG. 2, the protrusion 90 formed on the outer peripheral surface of the column connecting portion 9 and the fixing plate 6 protruding in the same direction along the lower surface of the connecting cylinder portion 4 are Because it is equivalent to an L-shaped outer beam (or bracket) connected in series to the inner corner of the joint, it is resistant to a vertical load applied to the tubular handrail 2 fitted to the connecting cylinder 4 It is convenient because of its large power. This configuration item is also common to the embodiments described below, but in the description of each embodiment below, it is added that repeated description is omitted unless there is a special need.

Next, FIG. 3 shows an embodiment of the handrail construction joint indicated as (b) in FIG. 1, and more specifically, an embodiment according to the inventions of claims 1 and 3 is shown. Yes.
The joint shown in FIG. 3 connects two tubular handrails 2 in a linear arrangement, and the two connecting cylinder parts 4, 4 are linear in a 180 ° symmetrical arrangement from the left and right ends of the joint base 3. The two fixing plates 6 are also protruded from the joint base 3 along the bottom surfaces of the connecting cylinders 4 and 4 in a 180 ° symmetrical arrangement in the same direction. As shown in FIG. 3b, the two left and right fixing plates 6, 6 are connected to each other in a single plate structure.
Also in this embodiment, each of the fixing plates 6, 6 has two fixing holes 7 used by a fixing tool such as a fixing screw or a rivet for fixing the tubular handrail 2 fitted to the connecting cylinder portion 4. It is provided one by one. Also in the case of the present embodiment, each connecting cylinder portion 4 is not a complete closed cross section (circular), and the portion facing the fixing plate 6 protruding in the same direction along the lower surface of each connecting cylinder portion 4 is: The fixing plate 6 is formed in a cylindrical shape having a cutout portion 40 that is cut out in a width dimension and shape that approximates the width dimension.
When the joint of the present embodiment is used, two tubular handrails 2 are connected to the two right and left connecting cylinders 4 and 4 in a linear arrangement. The tubular handrail material 2 that is externally fitted to the connecting cylinders 4 and 4 is firmly fixed by a fixing tool such as a fixing screw or a rivet using the fixing holes 7 of the fixing plates 6 and 6 to achieve the connecting purpose. And contribute to the construction of handrails.

The joint shown in FIGS. 4a to 4c is a handrail construction joint designated as (b) in FIG. 1, as in FIG. 3, and connects the two tubular handrail materials 2, 2. Although the basics of the two are common, the two tubular handrail members 2 and 2 are connected in two directions at right angles. In other words, an embodiment of a horizontal L-shaped joint is shown. This corresponds to the embodiment according to the above.
In the joint of the present embodiment, the joint base 3 having a hollow structure is curved by about 90 ° on a horizontal plane, and the two connecting tubular portions 4 and 4 are projected from both ends in directions different by about 90 °. Two fixing plates 6 are also protruded from the joint base 3 in the same direction along the lower surfaces of the connecting cylinders 4 and 4. As shown in FIG. 4b, the two left and right fixing plates 6 and 6 are formed in a single plate structure that is bent by about 90 ° and connected in series, and the fixing plates 6 and 6 in two directions are respectively provided with fixing holes. Two pieces of 7 and 7 are provided.
Therefore, when the joint of the present embodiment is used, the two tubular handrail members 2 and 2 are connected to the two right and left connecting cylinder portions 4 and 4 in an arrangement in which the direction is changed by about 90 ° in the horizontal direction. . Each tubular handrail material 2, 2 achieves the purpose of connection by fixing the tubular handrail material 2 externally fitted to the connecting tube portion 4 by a fixing tool using the fixing holes 7 of the fixing plates 6, 6, Contributes to the construction of handrails.

FIGS. 5a to 5d show a tilting universal joint for constructing a handrail indicated by a circle (c) in FIG. 1, and more specifically, an embodiment according to the first and fourth aspects of the present invention. Is shown.
In the illustrated joint, two connecting cylinders 4 and 4 are linearly projected in a 180 ° symmetrical arrangement from the left and right ends of the joint base 3, and the fixing plate 6 is also connected to the connecting cylinder 4 from the joint base 3. Two pieces are protruded in the same direction along the lower surface by 180 ° and fixed to each fixing plate 6 with a tubular handrail 2 that is externally fitted to the connecting cylinder 4 with a fixing screw or a fixing tool such as a rivet. As shown in FIG. 5, two fixing holes 7 are provided. Furthermore, according to FIG. 5 c, two hinge pieces 10, 10 protrude downwardly in a parallel arrangement with a slight gap on the lower surface of the joint base 3.
On the other hand, a single hinge piece 11 having a thickness inserted into the space between the hinge pieces 10 and 10 of the joint base 3 is formed at the upper end of the column connecting part 9 having a hollow socket structure arranged vertically downward. It is formed upward. The hinge piece 11 is overlapped with the hinge pieces 10 and 10 on the lower surface portion of the joint base 3, and the pin 12 is inserted into the pin holes at the center of rotation of both to constitute a hinge mechanism. 9 is connected to be tiltable.

In the case of this universal joint, the joint base 3 is configured to be freely connected by a hinge mechanism so as to be able to rotate (or tilt) about 90 ° as a rotation angle on the vertically downward supporting column connecting part 9. Yes.
Therefore, when this universal joint is used, even if the support column connecting portion 9 is connected to the upper end of the support column 1 and fixed with a fixture, it is connected to the connecting cylinder portions 4 and 4 on both the left and right sides of the joint base 3 in a linear arrangement. The two tubular handrails 2 and 2 can be freely connected in a horizontal posture parallel to the floor shown in FIG. 1 or parallel to the slope of the stairs according to the handrail design. Allows construction of handrails.

Next, FIGS. 6a to 6c show a tilting universal joint for handrail construction indicated by a circle (d) in FIG. 1, and more specifically, in the inventions of claims 1 and 5. Such an embodiment is shown.
6 (a) and 6 (c), one connecting cylinder 4 is projected from the right end of one joint base 3 located on the right side in FIGS. 6a and 6c, and the fixing plate 6 is also connected to the joint base 3 from the joint base 3. A fixing tool, such as a fixing screw or a rivet, that protrudes in the same direction along the lower surface of the connecting cylinder portion 4 and fixes the tubular handrail material 2 externally fitted to the connecting cylinder portion 4 is attached to the fixing plate 6. In the case of FIG. 6a, two fixing holes 7 for use are provided. Further, at the left end portion on the opposite side of the joint base 3, one hinge piece 10 ′ is projected at the central portion as seen in FIG. 6c.
On the other hand, in the other joint base portion 3 located on the left side in FIGS. A and c, one connecting cylinder portion 4 protrudes from the left end portion, and the fixing plate 6 is also connected to the connection base portion 3 from the joint base portion 3. One fixing hole 7 is used to use a fixing tool for fixing the tubular handrail material 2 externally fitted to the connecting cylinder part 4 on the fixing plate 6, protruding in the same direction along the lower surface of the cylinder part 4 for use. However, in the case of FIG. At the right end opposite to the joint base 3, two hinge pieces 10 ", 10" are arranged so as to sandwich both side surfaces of one hinge piece 10 'protruding from the central portion of the right joint base 3. Are projected in a parallel arrangement.
The two left and right joint bases 3 and 3 having the above-described configuration are hinge mechanisms in which the hinge pieces 10 'and 10 "are overlapped, and the pin 12 is inserted into the pin hole at the center of rotation and connected. It is connected to tilt freely.

Therefore, the two tubular handrails 2 are externally fitted to the two right and left connecting cylinder portions 4 and 4 and fixed by a fixing tool using the fixing hole 7 of each fixing plate 6, thereby the two pieces. The tubular handrails 2 and 2 are connected so that they can be rotated or tilted by about 90 ° as a rotation angle, and the handrails at the intermediate portions of the columns 1 and 1 shown by circles (d) in FIG. It is possible to achieve a tiltable connection according to the necessity of changing the direction of the material 2, and thus it is possible to construct a handrail that is rich in change.
Of course, the shape and structure of the hinge pieces 10 ′ and 10 ″ of the two right and left joint bases 3 and 3 constituting the hinge mechanism are not limited to the illustrated example.

Next, FIGS. 7 a to d show different embodiments of the handrail construction joint that is preferably used in the place indicated by the circle (c) in FIG. 1. This is an embodiment according to the inventions of Items 1 and 6.
Incidentally, the tilting universal joint shown in FIGS. 5a to 5d is also a handrail construction joint used in a place indicated by a circle (c) in FIG. 1, but the joint is composed of two left and right tubular handrails 2. 2 are connected in a linear arrangement, and the two tubular handrails 2 and 2 are configured so as to be tiltable in the vertical direction within a vertical plane while maintaining the linear arrangement. However, the universal joint of the present embodiment is a tubular handrail connected to the right and left two or a maximum of four joint bases 3 and these connecting cylinders 4 around the position fixed to the column 1 as described below. Each material 2 is independently (individually) configured to be freely tiltable (or swiveled) three-dimensionally in the horizontal or vertical direction.
That is, the two right and left joint bases 3 and 3 in the joint shown in FIG. 7 have a common configuration, and one connecting cylinder part 4 protrudes from one side end part thereof, and the fixing plate 6 is also connected to the connecting cylinder. A fixing hole 7 for applying a fixing tool for fixing the tubular handrail material 2 externally fitted to the connecting cylinder portion 4 is protruded in the same direction along the lower surface of the portion. In the example shown, two are provided. One spherical body 15 for forming a hinge protrudes from the opposite end of the joint base 3.
On the other hand, the upper end portion of the column connecting portion 9 which is a hollow socket structure arranged vertically downward is formed on a slightly narrow neck portion 18 on the side of the joint base portion 3 for hinge formation. In the case of FIG. 7c, four bases for hinges 17 provided in four orthogonal directions on a common horizontal plane are provided as a rectangular block shape. Then, the hinge-forming spherical bodies 15 of the two right and left joint bases 3 and 3 are rotatably fitted into two spherical concave surfaces 16 provided in a symmetrical arrangement on the left and right of the hinge base 17, respectively. These are connected in series by a tiltable hinge mechanism. Note that, in the hinge base portion 17, the opening portion of the spherical concave surface 16 that does not connect the hinge-forming spherical body 15 of the joint base portion 3 is closed by a cap 19 having a part of a spherical shape.

Therefore, after connecting the column connecting part 9 of the joint to the upper end of the column 1 and fixing it with a fixture, one end of the tubular handrail 2 is connected to the connecting cylinder 4 of the two right and left joint bases 3 and 3 respectively. Are fitted and fixed with a fixture using the fixing hole 7, each tubular handrail material 2 is as illustrated in the right side joint base 3 and tubular handrail material 2 in FIGS. The tubular handrail 2 can be tilted or swiveled three-dimensionally in the vertical and horizontal directions around the right side surface of the hinge base 17 at the top of the support column, that is, in a range of 90 degrees.
Therefore, when constructing the handrail as shown in FIG. 1, the tubular handrail material 2 is freely rotated or tilted in a necessary direction from the hinge base 17 of the column connecting portion 9 fixed to the column 1 as a base point. It is possible to easily realize a connection mode according to the design drawing of the slide, and to easily and freely construct a handrail according to the request of the installation place which is rich in change.

Next, FIGS. 8a to 8d show the connection of the handrail construction joint according to any one of claims 1 to 6, in which the tubular handrail material 2 externally fitted to the connecting cylinder portion 4 is fixed by a fixing tool. When the object is achieved, the configuration and means for fixing the tubular handrail material 2 externally fitted to the connecting cylinder portion 4 with fixing tools such as fixing screws or rivets using the fixing holes 7 of the fixing plate 6 are different. An example is shown. 8a to 8d show an embodiment in which a self-tap type fixing screw 8 is used as a fixture. However, the present invention is not limited to this, and even when a rivet is used, a substantially similar embodiment is exhibited. I will tell you just in case.
The main points of the configuration common to each of the embodiments shown as the cross-sectional shapes in FIGS. 8a to 8d are the fixed plate protruding in the same direction along the connecting cylinder 4 as described in claims 1 and 7. The inner side surface 6 a of the tube 6 has an arc shape substantially similar to the outer diameter surface of the tubular handrail material 2 so as to circumscribe the outer diameter surface of the tubular handrail material 2, and is thick enough to support the tubular handrail material 2. And a cantilever plate having a width dimension.
And since the fixing screw 8 of the self-tap type is used as a fixing tool using the fixing hole 7 provided in the fixing plate 6, the fixing hole 8 can pass the fixing screw 8. In addition, the hole wall of the fixing hole 7 is formed as a through-hole having a hole diameter that functions as a guide hole that allows the outer diameter surface of the fixing screw 8 to advance and retreat in a rotatable manner when screwing into the tubular handrail 2. ing. Even when a rivet is used as a fixture, the fixing hole having the above-described configuration is sufficient. However, it does not mean to exclude the configuration in which the screw hole in which the hole is threaded is provided as the fixing hole 7.

First, the description will proceed from the embodiment of FIG. FIG. 8a shows the most standard embodiment of the present invention, where the connecting cylinder 4 is cut away at a portion facing the fixing plate 6 with a width dimension approximating the width dimension of the fixing plate 6. FIG. A notch 40 is formed. The tubular handrail material 2 externally fitted to the connecting tube portion 4 is provided with a fixing screw 8 screwed toward the center of the tubular handrail material 2 through a fixing hole 7 provided in the center of the cross section of the fixing plate 6. The tube 2 of the material 2 is also screwed and penetrated, and the distal end of the fixing screw 8 is configured to enter the hollow part of the connecting cylinder part 4 through the notch part 40.
Next, in the embodiment shown in FIG. 8b, the width of the fixing plate 6 is formed to be almost twice as large as that of FIG. 8a, and two fixing holes 7 and 7 are formed on both the left and right sides of which the central portion is axisymmetric. Is attached to the connecting cylinder portion 4 and has a fixing screw 8 screwed into the tube wall of the tubular handrail material 2 through the two fixing holes 7 and 7 on the left and right sides. Each of the tubular handrail materials 2 is firmly fixed with a configuration that penetrates the tube wall of the tubular handrail material 2 and enters the hollow portion of the connecting cylinder portion 4 through the notch portion 40 to achieve the object.

Next, although the basic configuration of the embodiment shown in FIG. 8c is the same as that of FIG. 8a, the connecting cylinder portion 4 does not have a notch and has a complete closed cross-sectional circle. Therefore, the fixing screw 8 screwed into the tube wall of the tubular handrail material 2 through the fixing hole 7 of the fixing plate 6 is further screwed into the tube wall of the connecting tube portion 4 to penetrate the hollow portion of the connecting tube portion 4. The purpose of connection is achieved by entering and firmly fixing.
The embodiment shown in FIG. 8 d has a configuration similar to the embodiment shown in FIG. 8 c, but the portion facing the fixing plate 6 in the circular cross section of the connecting cylinder portion 4 is the fixing hole 7 of the fixing plate 6. The fixing screw 8 is formed as a flat portion 41 that is perpendicular to the tip of the fixing screw 8 that is screwed and penetrated into the tube wall of the tubular handrail material 2, so that the fixing screw 8 can be easily screwed into the flat portion 41. Has been.

  Although the present invention has been described based on the illustrated embodiment, the present invention is not limited to the illustrated embodiment. It should be noted that the present invention includes the scope of design changes and other modifications / applications made by a person skilled in the art as necessary.

DESCRIPTION OF SYMBOLS 1 Support | pillar 2 Tubular handrail material 3 Joint base part 4 Connecting cylinder part 5 Step part 6 Fixing plate 7 Fixing hole 8 Fixing screw (fixing tool)
9 Strut connecting part

Claims (9)

At least one connecting tube portion for closely fitting the hollow portion of the tubular handrail material is protruded from the joint base portion having the same diameter and the same shape as the outer diameter of the tubular handrail material, and the joint base portion and the connecting tube portion The boundary with is formed in a vertical step where the tip of the tubular handrail hits,
A fixing plate that protrudes in the same direction as the connecting tube portion in an arrangement in which the inner surface is circumscribed to the outer diameter surface of the tubular handrail material that is closely fitted to the connecting tube portion from the joint base portion. Is formed as a cantilever plate having a sufficient thickness and a fixed width, and a fixing hole for fixing a tubular handrail material externally fitted to the connecting cylinder portion to the fixing plate is fixed to the fixing plate. At least one is provided,
A joint for constructing a handrail, characterized in that the tubular handrail fitted on the connecting cylinder part is fixedly connected by a fixing tool using a fixing hole of the fixing plate. One connecting tube portion protrudes in the horizontal direction from one end of the joint base portion, and one fixing plate protrudes in the same direction along the lower surface of the connecting tube portion from the same end portion of the joint base portion. The fixing plate is provided with at least one fixing hole for fixing the tubular handrail material externally fitted to the connecting cylinder portion with a fixing tool,
At the opposite end of the joint base, a connecting portion of the column protrudes in the vertical downward direction,
The column connecting portion is connected to the upper end of the column, a tubular handrail is horizontally fitted to the connecting cylinder portion, and is fixedly connected by a fixing tool using a fixing hole of the fixing plate. The handrail construction joint according to claim 1, wherein Two connecting cylinders protrude from both ends of the joint base, and the fixing plate protrudes from the joint base along the lower surface of the connecting cylinder in the same direction. At least one fixing hole for fixing the fitted handrail with a fixing tool is provided,
The tubular handrail material is externally fitted to each of the two connecting cylindrical portions, and is configured to be fixed and connected by a fixture using a fixing hole of the fixing plate. For handrail construction. Two connecting cylinders are projected linearly from both ends of the joint base, and the fixing plate is also projected from the joint base in the same direction along the lower surface of the coupling cylinder, and is connected to each fixing plate for the connection. At least one fixing hole is provided for fixing the tubular handrail that is externally fitted to the cylindrical portion with a fixing tool, and a hinge piece protrudes downward on the bottom surface of each joint base,
On the other hand, a hinge piece is formed upward at the upper end of the column connecting portion that is arranged vertically downward, and the joint base is connected to the column by a hinge mechanism in which the hinge piece is connected to the hinge piece on the lower surface of the joint base by a pin. It is connected to the part in a tiltable manner,
2. The handrail according to claim 1, wherein a tubular handrail is connected to each of the two connecting cylinder portions in a linear arrangement, and the support connecting portion is connected to an upper end of the support. Fitting for construction. One connecting tube portion protrudes from one end of the joint base, and the fixing plate protrudes from the joint base along the lower surface of the connecting tube portion in the same direction. At least one fixing hole for fixing the externally fitted tubular handrail with a fixing tool is provided, and a hinge piece protrudes from the opposite end of each joint base,
The two joint bases are tiltably connected by a hinge mechanism in which each hinge piece is connected by an overlapping pin,
The tubular handrail material is externally fitted to each of the two connecting cylindrical portions, and is configured to be fixed and connected by a fixture using a fixing hole of the fixing plate. For handrail construction. One connecting tube portion protrudes from one end of the joint base, and one fixing plate protrudes from the joint base along the lower surface of the connecting tube portion in the same direction. At least one fixing hole for fixing the tubular handrail fitted externally to the cylindrical portion with a fixing tool is provided, and a spherical body for hinge formation protrudes at the opposite end of the joint base,
On the other hand, at the upper end of the column connecting portion arranged vertically downward, there is provided a hinge base portion in which a plurality of spherical concave surfaces into which the hinge forming spheres of the joint base portion are rotatably fitted are provided in different directions. And
The joint base and the column connection portion are freely connected by a hinge mechanism in which the hinge-forming spherical body of the joint base is rotatably connected to the spherical concave surface of the hinge base,
The joint for handrail construction according to claim 1, wherein the support connecting part is connected to an upper end part of the support and an end part of a tubular handrail is connected to a connecting cylinder part of each joint base part.   The inner surface of the fixed plate protruding in the same direction along the connecting tube portion of the joint base has a curved surface shape substantially similar to the outer diameter surface of the tubular handrail material, and the fixed plate is the outer diameter of the tubular handrail material. The joint for handrail construction according to any one of claims 1 to 6, wherein the joint is formed as a cantilever plate having a width dimension equal to or less than a lower half of the handrail.   The connecting cylinder portion of the joint base has a notch portion in which a portion facing the fixing plate protruding in the same direction along the outer diameter surface thereof is cut out with a width dimension approximate to the width dimension of the fixing plate. The joint for handrail construction as described in any one of Claims 1-7 characterized by the above-mentioned. A handrail constructed by connecting the column 1 and the tubular handrail material 2 and the tubular handrail materials 2 and 2 in combination using the joint for constructing the handrail described in claim 1,
Each of the handrail construction joints is characterized in that it is constructed by unifying the position of the fixing plate 6 so as to be arranged downward toward the ground side.

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