JPH06280366A - Staircase handrail structure - Google Patents

Abstract

PURPOSE:To minimize the need for machining such as cutting, boring and the like at a construction site, and thereby enable a staircase handrail to be constructed with ease in a short period of time even without using a skilled hand. CONSTITUTION:In the staircase handrail structure which comprises a handrail body 2 connected to the upper end section of a newel post 1 at its oned end 2a, and also connected to a vertical surface W such as a wall surface and the like at the other end 2b, and also comprises a side board 81 connected to the lower face side of the handrail body 2 at its upper end 3a while its lower end 3b is formed into a staircase S, or also comprises a plurality of small posts 3 connected to the stepping boards S2, the newel post 1 includes a connecting member 10 which connects one end 2a of the handrail body 2 to its upper end section. The connecting member 10 has one end 2a of the handrail body 2 secured in the inside of the connecting member via a horizontal hole formed in the side face of the member, so that the handrail body 2 is linked with the connecting member by means of a hang-locking structure 20 made up of a hanging member and a locking member which are connected with the other end 2b. The lower end of each small post 3 is brought into contact with the side board 81 or an oneway spherical recessed section (s) formed on the upper surface of the stepping board S2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved stair handrail structure.

[0002]

2. Description of the Related Art Generally, the slope of a handrail provided on a stair is set so as to correspond to the slope of the stair, but the slope of the stair itself is different. When performing the construction, it was supposed to perform predetermined disconnection and connection depending on the situation of the site.

That is, the handrail portion, the main pillar portion, the child pillar portion, etc., which compose the stair handrail, are selected from those produced in advance in the factory, etc. and cut into so-called long lengths so that the situation at the construction site can be improved. At the same time, further cutting and drilling for connection will be done.

Therefore, in the conventional measures, a high level of skill and skill is required to form the stair handrail, and in particular, nowadays when the skilled technicians are scarce, the stair handrail is formed in a short period of time and with a simple work. It is difficult to do so.

On the other hand, although the gradient of the stairs is different, the gradient of the stairs is generally set within the range of the basic gradient, which is about 43 to 48 degrees, that is, about ±. It is said that stair handrails are provided within a difference of about 5 degrees.

Therefore, within the above basic gradient, ± 5
By developing a structure that can eliminate the difference in degree, it becomes possible to mass-produce by stair handrail factory production, etc., and it is possible to greatly reduce the work at site construction, and even a non-expert technician can easily perform in a short period of time. It becomes possible to install stair handrails during work.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to reduce the work such as cutting and drilling at the construction site, even if not a skilled engineer. It is an object of the present invention to provide a staircase handrail structure that enables the staircase handrail to be provided in a short period of time and with a simple operation.

[0008]

In order to achieve the above-mentioned object, the structure of the present invention is constructed such that one end is connected to a main pillar that is erected on the uppermost step or the lowermost step of the stairs and the upper end portion of the main pillar. A handrail having the other end connected to an upright surface such as a wall surface, and a plurality of child pillars whose upper end is connected to the lower surface side of the handrail and whose lower end is connected to a side plate or a tread forming a staircase, In the staircase handrail structure having, the main pillar has a connecting member for connecting one end of the handrail to the upper end portion thereof,
The connecting member is configured such that one end of the handrail body is exposed to the inside through a lateral hole formed on the side surface thereof, and the handrail body is disposed on the standing surface and a hooking member continuously provided at the other end. The lower end of the child post is formed on the upper surface of the side plate or the tread plate, and the child post has a spherical lower end. It is assumed that it comes into contact with the unidirectional spherical concave portion.

More specifically, it is assumed that the connecting member is formed so as to allow expansion and contraction of the parent pillar in the axial direction, the latching structure is a dovetail groove structure, and the child pillar is It is assumed that the upper end has a spherical portion and that the spherical portion is housed in a concave portion formed on the lower surface side of the handrail body.

[0010]

Therefore, in the connection between the main pillar and the handrail body, one end of the handrail body is inserted into the lateral hole of the opening on one side surface of the connecting member connected to the upper end of the main pillar.

At this time, even if the arrangement gradient of the handrail is changed within a range of, for example, about ± 5 degrees from the basic gradient, one end of the handrail is inserted into the lateral hole. Therefore, the appearance in which one end of the handrail is connected to the connecting member, that is, the upper end of the main pillar in a so-called inclined state is not exposed in appearance.

Further, in the connecting member, the relative height of the base body with respect to the retractable body, that is, the relative height with respect to the upper end of the main pillar is changed by screwing the retractable body with respect to the base body.

As a result, the height positions of one end of the handrail and the upper end of the parent pillar are changed, and when the parent pillar is erected on the lowest step of the stairs or the like, it is erected vertically.

In connection with the handrail body and an upright surface such as a wall surface, it suffices to hook a continuous hooking member on the other end of the handrail body and hook a fixing locking member on the upright surface.

To fix the locking member on the vertical surface, the fixing position on the vertical surface is determined in a so-called temporary assembly state in which a hooking member connected to the other end of the handrail is hooked on the locking member. After that, the locking member separated from the hook member is fixed to the upright surface.

Further, in connection between the handrail and the child pillar and the connection between the child pillar and the side plate or tread forming the stairs, the child pillar is arranged vertically regardless of the arrangement of the handrail or the side plate. You can

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiment. The staircase handrail structure according to this embodiment is, as shown in FIG. 1, similar to the conventional staircase handrail structure of this kind. It has a pillar 1, a handrail body 2, and a plurality of child pillars 3.

The main pillar 1 is erected at the uppermost stage or the lowermost stage of the stairs S, and is assumed to be erected on the lowest stage of the stairs S, that is, the floor F in the illustrated example.

As for the standing structure of the main pillar 1 on the floor F or the like, it is sufficient to adopt a conventionally known structure.

The main pillar 1 has a connecting member 10 at the upper end thereof for connecting one end 2a of the handrail 2 which is the lower end in the figure, and the connecting member 10 is shown in FIG. As described above, the base body 11, the projecting / retracting body 12, the fixing mechanism 16 including the screw bolts 13, the demon nut 14, and the nut 15;
And a lid member 17.

The base body 11 is formed into a substantially rectangular prism shape with a bottom, has a hollow portion 11a therein, and is open to one side surface thereof while being opened to the hollow portion 11a to provide a handrail body. It has a lateral hole 11b that allows the insertion of one end 2a of the two.

The lateral hole 11b is formed to be slightly larger than the cross-sectional shape of the handrail body 2, that is, the one end 2a of the handrail body 2, that is, to have a tapered portion as shown in the illustrated example. Even when the handrail 2 is tilted within a difference of about ± 5 degrees with respect to the basic gradient, one end 2 of the handrail 2 is
Care is taken so that the insertion of a can be realized.

The base body 11 has a bolt insertion hole 1 whose upper end opens in the hollow portion 11a at the shaft core portion on the lower end side.
1 c, which has a large diameter screw hole 1 communicating with the lower end of the bolt insertion hole 11 c and opening at the lower end of the base 11.
1d.

A diametrical expansion recess 11e is formed at the upper end of the base 11.
Is formed, and a lid member 17 to be described later is fitted in the enlarged diameter recessed portion 11e.

The projecting / retracting body 12 is screwed into a threaded hole 11d formed on the lower end side of the base body 11, and by a screwing operation for advancing and retracting the base body 11, the projecting / retracting body 12 projects from the lower end of the base body 11 in the axial direction of the base body 11. Are formed.

The projecting / retracting body 12 has a threaded portion 12a at the upper end thereof which is screwed into the threaded hole 11d, and a bolt through which the shaft core portion communicates with the threaded hole 11d. It has a hole 12b.

A diametrically expanded recess 12 is formed at the lower end of the projecting / retracting body 12.
c is formed, and the upper end 1a of the parent post 1 is fitted into the enlarged diameter recess 12c.

Both screw bolts 13 constituting the fixing mechanism 16
Has threaded portions 13a,
13b, and is formed so as to be inserted into the bolt insertion holes 11c and 12b.

The threaded portions 13b on the lower end side of the both screw bolts 13 are screwed into the demon nut 14 constituting the fixing mechanism 16.

That is, the devil's eye nut 14 is the same as the projecting and retracting body 1 described above.
2 is embedded in the upper end 1a of the main pillar 1 fitted in the enlarged diameter recessed portion 12c formed at the lower end of the main pillar 1, and in the embedding thereof, the shaft core portion of the main pillar 1 from the upper end 1a of the main pillar 1 in advance. Compared to the outer diameter of the demon nut 14 with an appropriate length, it has a slightly smaller round hole 1b
It is assumed that the ogre nut 14 is penetrated into the round hole 1b by hammering or the like.

As a result, the demon nut 14 is fixed to the shaft center portion from the upper end 1a of the main pillar 1, and the inner peripheral thread 14 of the threaded portion 13b on the lower end side of the subsequent screw bolts 13 is fixed.
Allows screwing to a.

The upper end of each of the screw bolts 13, that is, a part of the threaded portion 13a on the upper end side is projected from the bolt insertion hole 11c in the base 11 and is present in the hollow portion 11a in the base 11.

A nut 15 constituting a fixing mechanism 16 is screwed to the threaded portion 13a on the upper end side of the screw bolts 13 with a washer 15a interposed.

The lid member 17 is provided to close the hollow portion 11a of the base 11 from the upper end side of the base 11, and it is sufficient if it is formed in a so-called lid shape. It may be formed in the shape of a decorative ball as shown in the example.

Therefore, in this connecting member 10, when the one end 2a of the handrail 2 is connected to the upper end of the main pillar 1, the one end 2a of the handrail 2 is attached to one side surface of the connecting member 10. It will be inserted into the lateral hole 11b of the opening.

At this time, even when the arrangement gradient of the handrail 2 is changed within a range of, for example, about ± 5 degrees with respect to the basic gradient, one end 2a of the handrail 2 has the lateral hole 11b. Since the handrail body 2 is inserted into the inside, the situation in which the one end 2a of the handrail body 2 is obliquely connected to the connecting member 10, that is, the upper end of the main pillar 1 is not exposed in appearance.

In addition, in the connecting member 10, the retractable body 12
The projecting / retracting body 1 of the base body 11 by screwing the base body 11 onto the base body 11.
2, the relative height with respect to the upper end of the main pillar 1 is changed,
Therefore, the height position between the one end 2a of the handrail 2 and the upper end of the parent post 1 is changed.

As a result, the horizontal floor F at the bottom of the stairs S
When the main pillar 1 is erected, it can be erected vertically on the floor F.

FIG. 3 shows another embodiment of the connecting member 10 described above. The connecting member 10 according to this embodiment also has a base body 11, a projecting and retracting body 12, both screw bolts 13, and an oval nut. It has a fixing mechanism 16 composed of 14 and a nut 15, and a lid member 17.

The basic structure is the same as that of the embodiment shown in FIG. 2 described above. Therefore, the same parts of the structure are given the same reference numerals in FIG. The description is omitted, and the following description focuses on the differences in this embodiment.

First, in the base body 11, the upper end is opened to the hollow portion 11a at the shaft core portion on the lower end side, and the hollow portion 11 is formed.
In addition to having a screw hole 11d having a smaller diameter than a,
It is assumed that there is a retractable body insertion hole 11e communicating with the lower end of the threaded hole 11d and opening at the lower end of the base 11 and having a larger diameter than the hollow portion 11a.

The lower end of the projecting / retracting body 12 is a small-diameter portion 12d, and the small-diameter portion 12d is fitted into a recess 1c formed in the upper end 1a of the main pillar 1.

Further, in the both screw bolts 13 constituting the fixing mechanism 16, this is formed longer than in the case of the embodiment shown in FIG. 2, and the threaded portion 1 located at the upper side in the drawing.
The upper end of 3a is supposed to be present in the enlarged diameter recess 11e of the upper end of the base 11.

The fixing mechanism 1 is attached to the thread 13a.
Although the nut 15 constituting 6 is screwed under the washer 15a, the washer 15a is arranged in the enlarged diameter recess 11e.

Therefore, this embodiment has an advantage that the so-called locking operation of both screw bolts 13 constituting the fixing mechanism 16 is facilitated.

In the lid member 17, the devil's eye nut 17a embedded in the shaft core of the lid member 17 from the lower end surface thereof.
And the upper end side of the thread portion 13a of both screw bolts 13 is screwed into the demon nut 17a,
It is said that the fixing of the lid member 17 to a predetermined position is realized.

The handrail body 2 has one end 2a connected to the upper end portion of the main pillar 1, that is, the connecting member 10, while the other end 2b which is the upper end in FIG. It is supposed to be connected to the upright surface W.

That is, in the illustrated example, the latch structure 20
As shown in FIG. 4, the locking member 21 fixed to the upright surface W and the locking member 21 provided continuously to the other end 2b of the handrail 2 are provided.
And a hook member 22 that is locked to the hook member 22, and the lock member 21 and the hook member 22 are configured in a dovetail groove structure.

As shown in FIG. 5, the locking member 21 is formed so that its front shape has a wedge shape that spreads to the lower end side. It is said that it will be fixed in place.

When the locking member 21 is fixed to the upright surface W, a substantially inverted V-shaped front shape is formed between the upright surface W and the so-called rear side which is the left side in FIG. Ant groove 21 to present
a can be formed.

On the other hand, the hooking member 22 is formed so that its external appearance takes the form of a decorative plate, and a handrail body is provided at the center of the front face thereof as shown by a virtual diagram in FIG. As shown in FIG. 4, the other end 2b of the sliding member 2 is maintained adjacent to the other end 2b of the sliding member 2, that is, the other end 2b of the sliding member 2 is connected.

The hooking member 22 is fitted in the dovetail groove 21a formed in the locking member 21, on the so-called rear side on the left side in FIG. 4, that is, the substantially V-shaped front surface. It has a rib portion 22a formed to have a shape.

Therefore, in the latch structure 20, the locking member 21 fixed in advance at a predetermined position on the standing surface W is provided.
By hooking the hook member 22 continuously provided on the other end 2a of the handrail body 2, the other end 2a of the handrail body 2 can be continuously provided on the wall surface or other vertical surface W.

Incidentally, in fixing the locking member 21 to a predetermined position on the vertical surface W, a so-called temporary locking of the hooking member 22 continuous with the other end 2a of the handrail 2 to the locking member 21. In the assembled state, determine the fixing position of the locking member 21 on the vertical surface W,
After that, it is preferable that the locking member 21 separated from the hooking member 22 is fixed to the upright surface W.

It is assumed that the upper end 3a of the child post 3 is connected to the lower surface side of the handrail 2 while the lower end 3b thereof is connected to the side plate S1 or the step plate S2 forming the stairs S,
In the illustrated example, the lower end 3b is connected to the step board S2 (see FIG. 1).

That is, as shown in FIG. 6, the daughter pole 3 has a spherical portion 3c at its upper end 3a, and the spherical portion 3c is inside a recess 2c which is previously formed on the lower surface side of the handrail 2. It is said to be housed in.

The inner diameter of the recess 2 is set to be slightly larger than the outer diameter of the spherical portion 3c, and the depth thereof is set to be slightly smaller than the diameter of the spherical portion 3c. There is.

Incidentally, the recess 2c need only be formed in a cylindrical shape, and is not necessarily set to a spherical void so as to form a so-called spherical structure.

Since the spherical portion 3c is housed in the concave portion 2c formed on the lower surface side of the handrail body 2, the gradient when the handrail body 2 is arranged is approximately ± 5 degrees with respect to the basic gradient. Even in the case where the handrail body 2 is changed within the difference, it is possible to always arrange the child pillar 3 in the vertical state on the lower surface side of the handrail body 2.

Further, since the depth of the concave portion 2c is set to be slightly smaller than the diameter of the spherical portion 3c, the spherical portion 3c accommodated in the concave portion 2c can be used by using the wood screw 3d. It becomes possible to stick to.

On the other hand, the upper end 3a of the child pillar 3 is connected to the handrail 2 as described above, while the lower end 3b of the child pillar 3 is connected.
As shown in FIG. 7, the tread S
It is supposed to be connected to 2.

That is, the connecting structure 30 has a hakama member 31 fixed to the step board S2, and a lower end 3b of the subsidiary pillar 3 attached to the hakama member 31.
And a threaded rod 32 that connects the two.

The hakama member 31 is formed in the shape of a cylinder with a bottom, the upper end of which is open.
Can be projected and retracted, that is, inserted so as to enable the child post 3 to advance and retreat in the axial direction.

The hakama member 31 is fixed to the upper surface of the step board S2 by a wood screw 33 which vertically penetrates the lower wall thickness portion thereof.

The lower end of the threaded rod 32 is screwed into the ogre nut 34 embedded in the thick portion of the lower end of the hakama member 31, and the upper end of the thread rod 32 is embedded in the lower end 3b of the post 3. It is supposed to be screwed into the nut 35.

The lower end of the threaded rod 32 is so-called locked under the interposition of a washer 36a by a nut 36 screwed on the lower end of the thread rod 32 after being screwed into the demon nut 34.

A vertical hole 3e extending in the axial direction of the child pillar 3 is provided at the lower end of the child pillar 3 in which the demon nut 35 is embedded.
Is opened, and is configured to allow the intrusion of the upper end side of the screw rod 32.

Therefore, in the connecting structure 30, it is possible to vertically connect the lower end 3b of the child pillar 3 which is hung from above to the tread plate S2. Due to the linkage with the connection structure of the upper end 3a of the above, the child pillar 3 is always arranged vertically regardless of the change in the arrangement gradient of the handrail 2.

FIG. 8 shows another embodiment of the connecting structure 30. In the connecting structure 30 according to this embodiment, the lower end of the hakama member 31 and the head tree S3 adjacent thereto are shown.
It is assumed that a deformation has been made between the upper surface of and.

Incidentally, the headboard S3 is a side plate S constituting the stairs S.
1 (see FIG. 1) is arranged so as to match the slope of the stairs S.

That is, in the connection structure 30, the child pillar 3
The lower end of the hakama member 31 forming the lower end 3b of the stairs is set to a curved curved surface 31b having a curved cross section, while the stairs S
It is supposed that the upper surface of the headstock S3 constituting the above is set to have a cross-sectional shape that coincides with the lower end of the hakama member 31, that is, a unidirectional spherical concave portion s.

Therefore, according to this embodiment, when the arrangement gradient of the handrail 2 to which the upper end of the child pillar 3 is connected is changed with respect to the basic inclination, the child pillar 3 is When vertically suspended, the lower end of the child pillar 3 and the step board S2 can be connected to each other without forming a gap.

In the illustrated example, the hakama member 31 and the head tree S
A metal fitting 37 inserted between the shaft core portion of the hakama member 31 and 3
The nail portion 37a of the is connected by being driven into the headstock S3 via the demon nut 34, and the threaded portion 37b of the metal fitting 37 is provided on the child pole 3 side between the hakama member 31 and the child pole 3. It is said that they are connected by being screwed into the onime nut 35.

FIG. 9 shows an embodiment of an expansion / contraction structure 40 in which the upper end portion of the child pillar 3 is expandable / contractible. The expansion / contraction structure 40 is connected to the upper end of the parent pillar 1 as described above. Member 1
0 and the connecting structure 30 arranged at the lower end 3b of the child post 3 described above.
It is formed in a structure similar to.

That is, the expandable structure 40 has a base 41, a projecting / retracting body 42, and a thread rod 43.

The base body 41 is formed in a substantially rectangular tube shape with a bottom, and has a hollow portion 41a which opens at the upper end inside thereof, and the hollow portion 41a having the upper end at the shaft core portion on the lower end side.
It has a bolt insertion hole 41b opening to a.

A reduced diameter portion 41c is formed at the lower end of the base body 41, and the reduced diameter portion 41c is fitted in a recess 3f formed in the upper end 3a of the lower child pillar 3.

The projecting / retracting body 42 has a hollow portion 41a formed inside the base body 41 so that the lower end side thereof is retractable, while the projecting / retracting body 42 has an upper end 3a in the child post 3 shown in FIG.
Similarly to the above, the concave portion 2 formed on the lower surface side of the handrail 2 at the upper end thereof
It has a spherical portion 42a housed in c.

The projecting / retracting body 42 has a threaded rod 43, which will be described later, which is opened at the lower end side of the shaft core portion from the lower end surface thereof.
It has a vertical hole 42b that allows insertion of the upper end side thereof.

The threaded rod 43 has an upper threaded portion 43a.
Is screwed onto the demon nut 44 embedded in the opening end of the vertical hole 42b that is opened in the projecting and retracting body 42, and the lower threaded portion 43b thereof is opened at the upper end shaft core of the subsidiary column 3. It is said that it is screwed into an ogre nut 45 embedded in the vertical hole 3g.

The threaded rod 43 has a nut 46 screwed in its intermediate portion with a washer 46a interposed therebetween.
By screwing the nut 46, the base 41 and the post 3 are integrated.

Therefore, in the expandable structure 40 according to this embodiment, since the spherical portion 32a formed on the retractable body 42 is housed in the recess 2c formed on the lower surface side of the handrail body 2, the handrail body 2 is formed.
Even when the inclination at the time of disposing is changed within a difference of about ± 5 degrees with respect to the basic inclination, the child post 3 is always arranged vertically on the lower surface side of the handrail body 2. It will be possible.

Further, in the expandable structure 40 according to this embodiment, the retractable body 42 is retracted from the base body 41, so that the expandable structure 40 can be expanded and contracted in the axial direction of the subsidiary column 3. At the upper end side of the child post 3, its length can be adjusted.

[0084]

As described above, according to the present invention, in the connection of the main pillar and the handrail body, one end of the handrail body is formed in one side surface of the connecting member continuous with the upper end of the main pillar. Since it is inserted inside, the arrangement gradient of the handrail is, for example, ±
Even when the handrail is connected to the main pillar even when the handrail is changed within a range of a difference of about 5 degrees, one end of the handrail is tilted so that the upper end of the main pillar is inclined. There is an advantage that the situation connected to is not exposed.

Further, according to the present invention, since the connecting member is formed so as to be capable of expanding and contracting, the relative height of the base body with respect to the retractable body, that is,
Since the relative height with respect to the upper end of the main pillar is changed, it is possible to change the height position between the one end of the handrail and the upper end of the main pillar, and when the main pillar is erected at the bottom of the stairs, etc. This has the advantage that it can always be erected vertically.

According to the present invention, in connection with a handrail body and an upright surface such as a wall surface, a hooking member connected to the other end of the handrail body is provided in advance at a predetermined position of the wall surface or the like. There is an advantage that it is sufficient to hang it on the locking member that is fixed to.

Further, according to the present invention, in connection between the handrail and the child pillar and the connection between the child pillar and the side plate or the tread forming the stairs, the child can be installed regardless of the arrangement of the handrail or the side plate. There is the advantage that the columns can be arranged vertically.

As a result, according to the present invention, it is possible to significantly reduce the work such as cutting and drilling of members at the construction site where the stair handrail is provided, and therefore, even if not a skilled engineer, in a short period of time. There is an advantage that the stair handrail can be provided by a simple work.

[Brief description of drawings]

FIG. 1 is a side view showing a stair handrail structure according to an embodiment of the present invention.

FIG. 2 is an enlarged side sectional view showing a connecting member for connecting the handrail to the main pillar.

FIG. 3 is an enlarged side sectional view showing another embodiment of the connecting member as in FIG.

FIG. 4 is an enlarged side cross-sectional view showing a hooking structure for connecting the other end of the handrail to an upright surface such as a wall surface.

5 is an enlarged front cross-sectional view of the latch structure shown by the line YY in FIG.

FIG. 6 is an enlarged side cross-sectional view showing a connection state of the upper ends of the child pillars to the lower surface side of the handrail body.

FIG. 7 is an enlarged side cross-sectional view showing a connecting structure that enables the lower end of the child post to be connected to a tread plate that is disposed at the lower end of the child post and constitutes a staircase.

FIG. 8 is an enlarged side cross-sectional view showing another embodiment of the connection structure as in FIG.

FIG. 9 is an enlarged side cross-sectional view showing a telescopic structure arranged on the upper end of the handrail.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Parent post 2 Handrail 2a One end 2b Other end 2c Recess 3 Subpost 3a Upper end 3b Lower end 3c Spherical part 10 Connecting member 11b Horizontal hole 20 Locking structure 21 Engaging member 22 Hooking member S Stair S1 Side plate S2 Step plate s Unidirectional spherical surface Recess W Elevation

Claims (4)

[Claims] 1. A parent pillar that is erected at the top or bottom of a staircase, a handrail that has one end connected to the upper end of the parent pillar, and the other end connected to an upright surface such as a wall surface, and the handrail. In a staircase handrail structure having a plurality of child pillars whose upper end is connected to the lower surface side of the body and whose lower end is connected to a side plate or a tread forming a stair, a parent pillar has a handrail body at its upper end. A connecting member for connecting one end of the handrail to the inside of the handrail body through a lateral hole formed in the side surface thereof, and the handrail body is continuously connected to the other end. It is connected by a hooking structure composed of a hanging member and a locking member which is arranged on the vertical surface and locks the hooking member. The lower end of the pillar is brought into contact with the unidirectional spherical concave portion formed on the upper surface of the side plate or the tread plate. Stair handrail structure characterized by 2. The staircase handrail structure according to claim 1, wherein the connecting member is formed so as to be capable of expanding and contracting in the axial direction of the main pillar. 3. The stair handrail structure according to claim 1, wherein the hanging structure is a dovetail structure. 4. The staircase handrail structure according to claim 1, wherein the child pillar has a spherical portion at its upper end, and the spherical portion is housed in a recess formed on the lower surface side of the handrail body.