KR101582118B1 - Free handrail - Google Patents

Abstract

[PROBLEMS] To provide a free rail which can be manufactured easily and inexpensively with a simple structure, and which can easily and safely be attached to a conventional stair step or a scaffold.
The freehand rail 1a includes a handrail member 2 provided along the inclination of the stepped stairs S, a cylindrical support 3 supporting the end of the handrail member 2, And a fixing means 4 provided at the lower end of the column 3 and connected to the board P of the stepped stairs S via the fixing means 4 so as to be detachable.

Description

Free Handrail {FREE HANDRAIL}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a free handrail to be used by being attached to a temporary staircase or a scaffold installed on a construction site or the like, and in particular, It is about free railings.

In a construction site or a construction site, a temporary scaffold is installed to facilitate the movement of an operator. In some cases, a stepped staircase may be provided to connect the upper and lower pedestals. In many cases, a parapet is required to prevent an accident such as a worker from falling on the pedestal or the stepped stairs.

The railing used for the scaffolding is removed after completion of the construction work. Also, in the usual case, there is not enough space around the scaffold. For this reason, there has been a demand for a handrail which is simple in structure, is easy to carry, and can be safely and easily operated such as attachment and removal.

Recently, in order to meet such a demand, various researches and developments have been made on the construction of a lightweight structure (a lightweight structure), and several inventions and designs have already been disclosed.

For example, Patent Document 1 discloses an invention relating to a "stepped staircase" that can be used as a ladder and is lightweight and safe.

In the invention disclosed in Patent Document 1, a metallic single-beam beam is used instead of a steel plate sandwiching a board from both sides of a metallic board which is bent in a gate- This angle is adjustable. The structure of the present invention is a structure in which a railing support post is installed upright on a metal support plate so that a railing made of a metal single end can be attached to and detached from the railing support post and the angle can be varied have.

According to this structure, since the number of components is small and lightweight, it can be moved easily. And you can change the place where you lean up like a ladder.

Patent Document 2 discloses an invention relating to a work footrest to be installed around a structure in the name of "work footwork of a structure" when assembling or repairing the structure.

The invention disclosed in Patent Document 2 is characterized in that a footrest attachment base to which a base end portion is connected to a plurality of eye plates provided at a predetermined interval in the circumferential direction on the outer peripheral surface of the structure, A parapet having a lower end inserted into a parapet supporting barrel fixed to a front end of the foot attachment member, and a fixing member fixed to the upper part of the parapet, And a transverse railing pipe (a railway pipe) inserted into an orthopedic (fixed cylinder).

According to this structure, not only the operation pedestal can be easily installed close to the outer periphery of the structure with the common member, but also the parapet can be easily provided to the operation pedestal.

Patent Document 3 discloses an invention relating to a " prefabricated footstep " which can be raised or lowered by an operator in a building construction site or the like, and is easy to assemble and disassemble.

According to the invention disclosed in Patent Document 3, a vertical frame composed of a pair of front and rear vertical columns and a horizontal column laid between the vertical columns, and a vertical frame formed between the vertical columns and the horizontal column of the vertical frame, And a frame body that is detachably coupled between the vertical columns adjacent to each other in the transverse direction. The frame body is provided with a pair of right and left longitudinal direction pillars and a width and a handrail which are installed so as to be attachable to and detachable from the inner lower and upper portions of the respective longitudinal direction pillars, So that the horizontal column can be attached and detached.

According to this structure, it is possible to assemble or dismantle the vertical support, the railing support, and the support on both sides of the support. In addition, the safety of the operator is promoted by the frame body disposed on both sides of the foot plate. Also, falling of tools, stoppers, debris and the like from the foot plate is prevented by the lugs.

: Japanese Unexamined Patent Publication No. 2011-241560 : Japanese Patent Application Laid-Open No. 2000-129908 Japanese Patent Application Laid-Open No. 6-299691

However, according to the invention disclosed in the above-mentioned prior art Patent Document 1, there is a problem in that it can not be used for a conventional stair step or a temporary stool because a railed receiving post can be attached only to a dedicated metal stool.

In the invention disclosed in Patent Document 2, there is a problem in that the general purpose is insufficient because the object to be attached is limited because of the structure in which the railing support is inserted into the railing support barrel fixed to the front end portion of the footrest attachment member.

Further, in the invention disclosed in Patent Document 3, since the railing constitutes a part of the frame body, and each frame body is provided on the footrest, the installation object and the installation place are limited. Further, there is a problem that it is not easy to carry or store because of its large volume.

The present invention has been made in response to such conventional circumstances, and it is an object of the present invention to provide a free rail which can be manufactured easily and inexpensively with a simple structure, and which can be easily and safely attached to a conventional stair step or a scaffold The purpose.

In order to achieve the above object, the present invention provides a free rail which is attached to a plate member constituting a plate of a standing stair tread or a top plate of a stool tread, wherein a connecting piece is formed at both ends, A fixing means having a rod-like support having a circular outline in cross-section and a clamp for attaching the plate to the lower end of the support, and a fixing means provided on the support and connected to one end of the railing member And a first shaft member orthogonal to the longitudinal direction of the strut, and as the fixing means, the first shaft member is connected to the supporting member so as to be rotatable through the first shaft member, A connecting plate provided so as to stand upright on the angle adjusting plate and parallel to the first shaft member, and a back surface of the clamp to the connecting plate, That is installed in the connecting plate angle fixing means for fixing in the angle of rotation will be characterized.

In the case of the free guardrail of the above structure, it is easy to manufacture because it is a simple structure composed of two kinds of members, namely, a parapet member and a support. Also, when not in use, it is easy to carry because it can disassemble the railings and supports. Further, by releasing the restraint by the connecting plate angle fixing means, the back surface of the clamp becomes rotatable with respect to the connecting plate, and the angle formed by the opening and closing directions of the clamp projected on the virtual plane parallel to the connecting plate and the first axis becomes variable . And the rotation angle of the back surface of the clamp with respect to the connection plate is restricted by the connection plate angle fixing means so that the angle formed between the opening and closing direction of the clamp and the first axis is fixed.

According to a second aspect of the present invention, in the free parapet described in claim 1, the parapet member is connected to the connecting piece so as to be rotatable in a virtual plane parallel to the longitudinal direction of the rod-like body, And the support means comprises a first take-off stopper and a second take-off stopper arranged so as to face each other and a male or female portion formed on a part of the outer circumferential face of the support, wherein the first take- And the other end is fixed to the outer circumferential surface of the strut, and at least one of the opposite surfaces is formed with a concave groove for engaging with the engaging piece.

According to the free guardrail of this structure, in addition to the function of the invention described in claim 1, there is provided an effect that the angle formed by the joining piece and the bar-shaped body in the virtual plane is easily changed. In addition, in a state in which the coupling piece is disposed between the first take-out restricting portion and the second take-off restricting portion, the threaded portion of the first take-out restricting portion and the second take- And an effect that the balancer member is supported by the supporting means in a non-releasable manner by narrowing the proton spacing. In addition, from this state, the releasing member screwed to the male screw portion is rotated to widen the interval between the first and second escape preventing members, so that the railing member can be easily removed from the supporting means.

According to a third aspect of the present invention, in the free rail according to the second aspect of the present invention, instead of the joint portion, a plate-like connecting portion is formed at one end of the rod- And a connecting ring connected to a coupling piece formed so that the outer shape forms a part of an arc when viewed in a plane, the coupling ring having a supporting portion for supporting the insertion portion to rotate about the central axis, And the coupling ring is formed to be engageable with the concave groove in a state where the coupling piece is inserted into the first and second escape chambers.

In the invention described in claim 2, since only the central axis of the connecting piece is the axis of rotation of the handrail member, the rotational plane of the handrail member is switched from a state parallel to the longitudinal direction of the support to an orthogonal state , It is necessary to change the interval between the first and second drop prevention ports. On the other hand, according to the invention of claim 3, since the handrail member can be simultaneously rotated about the central axis of the connecting piece and the central axis of the insertion portion of the connecting port orthogonal to the connecting shaft, the first and second falling- It is not necessary to change the interval of the earth to change the rotation plane of the handrail member from a state parallel to the longitudinal direction of the support to an orthogonal state. It is also easy to connect or disconnect the connecting ring to the connecting ring.

delete

delete

According to a fourth aspect of the present invention, in the free rail according to any one of the first to third aspects , the support piece includes a first insertion hole into which the first shaft is inserted, And a first angle fixing hole formed at a predetermined interval along the first axis and inserted into the second shaft, wherein the angle adjusting plate includes a second insertion hole into which the first shaft is inserted in a state of being connected to the first insertion hole, And a plurality of second angle fixing holes formed at substantially equal intervals along a rotation locus of a predetermined radius centering on the first insertion hole and the second angle fixing hole, And the fixing means is attached to the angle adjusting plate such that the opening and closing directions of the clamp are orthogonal to the first shaft member.

According to the free guardrail of this structure, in addition to the effect of the invention of any one of claims 1 to 3 , the angle adjusting plate is rotated relative to the supporting piece through the first insertion hole and the first shaft inserted in the second insertion hole And the second shaft is inserted into the first angle fixing hole and the second angle fixing hole so that the rotation of the angle adjusting plate is restrained. When the second shaft is pulled out from the second angle fixing hole, And an effect that the angle formed between the opening and closing direction of the clamp and the longitudinal direction of the support is variable in an imaginary plane orthogonal to the first shaft member with respect to the support member. When the second shaft is inserted into the second angle fixing hole and the rotation of the angle adjusting plate against the support piece is restrained, the angle formed between the opening direction of the clamp and the longitudinal direction of the support is fixed.

According to a fifth aspect of the present invention, in the free parapet according to any one of the first to third aspects , the supporting piece includes: a first insertion hole into which the first shaft is inserted; And a first angle fixing hole formed at a predetermined interval along the first axis and inserted into the second shaft, wherein the angle adjusting plate includes a second insertion hole into which the first shaft is inserted in a state of being connected to the first insertion hole, And a second angle fixing hole formed in the shape of a long hole along a rotation locus having a predetermined radius around the insertion hole, and a male screw portion is formed on a side surface of an arc shape, and the male screw portion of the angle adjusting plate A rotation restraining means for generating a frictional force is provided between the rotating gear and the side face of the gear and the fixing means is attached to the angle regulating plate such that the opening and closing directions of the clamp are orthogonal to the first shaft member .

In the invention described in claim 4 , when changing the angle of rotation of the angle adjusting plate with respect to the support, it is necessary to insert the second shaft member inserted into the second angle fixing hole into another second angle fixing hole to change the angle. On the other hand, the invention described in claim 5 has an effect that the angle of rotation of the angle adjusting plate with respect to the support is continuously changed. And rotation of the rotating gear engaged with the male screw portion of the angle adjusting plate is suppressed by the rotation restricting means so that the rotational speed of the fixing means with respect to the support is adjusted.

delete

delete

delete

delete

As described above, according to the free rail described in claim 1 of the present invention, transportation cost and manufacturing cost can be reduced. Since the opening and closing directions of the clamp projected on the plane parallel to the connecting plate and the angle formed by the first axis can be adjusted, it can be attached to various members having a thickness that can be held by the clamp.

According to the second aspect of the present invention, in addition to the effect of the invention described in claim 1, the supporting means can be commonly used for a plurality of handrail members of different sizes of coupling pieces . Further, by the simple operation of rotation of the first falling-off zone or the second falling-out zone, it is possible to connect or disconnect the supporting member to the support. Therefore, it is possible to easily and safely perform the installation work on the stair step and the like. Also, since the handrail member, the support, the fixing means, and the supporting means are simple and lightweight, they are easy to carry and can be manufactured at low cost.

In addition, the angle between the longitudinal direction of the support and the rotation plane of the joint portion can be adjusted by changing the distance between the opposing faces when the joint portion is supported by the first and second exit zones. As a result, the connecting direction of the handrail member with respect to the support is not limited, so that there is little restriction on the installation place of the support. Therefore, it can be attached to a conventional stair step or a temporary stool.

According to the free rail according to claim 3 of the present invention, the operation when turning the handrail member is easier than in the invention described in claim 2, so that workability is good.

delete

According to a fourth aspect of the present invention, in addition to the effect of any one of the first to third aspects of the present invention, The angle formed by the longitudinal direction can be adjusted. Therefore, if the member has a thickness that can be held by the clamp, it can be easily attached without worrying about the attachment angle.

According to a fifth aspect of the present invention, in addition to the effect of any one of the first to third aspects of the present invention, the free rail raises the second shaft member when the angle of rotation of the angle- It is not necessary to perform a change operation, and therefore an effect that the working efficiency is improved can be obtained. In addition, it is safe because it is possible to prevent an accident such as sudden collapse of the support post during the operation of fixing the fixing means to a stair step or the like by adjusting the rotation speed of the fixing means with respect to the support. Further, since the angle formed by the opening / closing direction of the clamp and the longitudinal direction of the support can be adjusted in a plane perpendicular to the first shaft member, if the member has a thickness that can be held by the clamp, Can be attached.

delete

delete

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an external view of Embodiment 1 of a free-guard railing according to an embodiment of the present invention; FIG.
2 (a) to 2 (c) are a front view, a side view, and a rear view, respectively, of a strut constituting the free handrail of the first embodiment.
3 (a) and 3 (b) are front views showing a state in which the struts of FIG. 2 (a) are disassembled, and FIG. 3 (c) Fig.
4 (a) to 4 (d) are a front view, a side view, a plan view, and a rear view, respectively, of a fixing portion constituting the fixing means shown in Fig.
In Fig. 5, (a) and (b) are a front view and a side view, respectively, of an attaching portion constituting the fixing means shown in Fig.
In Fig. 6, (a) and (b) are partial enlarged views of the fixing means and the vicinity thereof in Fig. 2 (b) and Fig. 2 (c), respectively.
7 (a) is a front view of a parapet member constituting a free parapet according to the first embodiment, and Fig. 7 (b) is a longitudinal sectional view partially showing a joint portion and a vicinity thereof in an enlarged view in Fig. 7 (a).
8 (a) is a partial enlarged view of the supporting means and the vicinity thereof in Fig. 1, and Fig. 8 (b) is a longitudinal sectional view of Fig. 8 (a).
9 (a) is a sectional view taken along the line C-C in Fig. 8 (a), and Fig. 8 (b) is a view showing a modification of the connection state of the handrail member in Fig. 8 (a).
10 is an external view of Embodiment 2 of a free-guard railing according to an embodiment of the present invention.
10 is a cross-sectional view taken along the line E-E in Fig. 10, a cross-sectional view taken along the line F-F, a cross-sectional view taken along the line G-G, Fig.
Fig. 12 is an external view of Embodiment 3 of a free handrail according to the embodiment of the present invention. Fig.
13A is a front view of a parapet member constituting a free parapet according to the third embodiment, FIG. 13B is an enlarged view of an end portion of the parapet member viewed from the I direction in FIG. 13A, Is a sectional view taken along the line J-J in Fig.
14 (a) and 14 (b) are respectively a side view and a front view of the connector, and FIG. 14 (c) is a sectional view taken along the line K-K in FIG.
In Fig. 15, (a) and (b) are a side view and a plan view, respectively, of the connecting ring, and Fig. 12 (c) is a partially enlarged view of the supporting means and its neighborhood.
16 is an enlarged view of the fixing means in Fig.
17 is a view seen from the L direction arrow in Fig.
18, (a) is a sectional view taken along the line M-M in Fig. 16, and Fig. 18 (b) is a perspective view showing the appearance of a part to be assembled to the shaft.

The structure, action and effect of the free handrail of the present invention will be described in detail with reference to Figs. 1 to 18. Fig.

In this embodiment, the case is assumed to be provided on a temporary staircase, but the following description is also applicable to the case where the case is provided on a temporary scaffold.

Example 1

The free parapet according to the first embodiment will be described with reference to Figs. 1 to 9 (particularly corresponding to claims 1, 2 and 4 ).

Fig. 1 shows the appearance of the free handrail 1a of the present embodiment, but is schematically shown for the stepped stairs S. Fig. 3 (a) and 3 (b) are external views of the upper strut 6 and the lower strut 7, respectively, and Fig. 3 (c) And the lower end (lower end) of the lower support 7 is partially enlarged. In Fig. 3 (c), bolts and nuts are omitted from the drawings.

As shown in Fig. 1, the free handrail 1a includes a handrail member 2 provided along the inclination of the stair step S, and a handrail member 2 which supports the end of the handrail member 2 (3) and a fixing means (fixing means) (4) provided at the lower end of the column (3). The fixing means (4) (Tread plate) P so as to be detachable therefrom.

As shown in Fig. 2 and Fig. 3, the strut 3 is a rod-like metal member having a circular outline of a cross section, and has an annular grasping portion (grasping portion) 5a are formed and a lower column support 7 which is inserted into the upper support 6 such that the upper support 6 can slide from above. In this embodiment, the upper strut 6 is inserted into the lower strut 7, but the lower strut 7 may be inserted into the upper strut 6. The upper strut 6 and the lower strut 7 both have a cylindrical shape (see Fig. 8 (b)), but only the inserted strut 6 and the lower strut 7 have a cylindrical shape, .

A supporting means 8 is provided in the vicinity of the grip portion 5a in the upper support 6 and a pair of pins 8 are provided on the side between the supporting means 8 and the lower end 6b, Holes 6c and 6c are formed at two upper and lower portions.

On the other hand, in the lower strut 7, the support means 9, 10 are provided respectively in the vicinity of the upper end 7a and the pin insertion holes 6c, 6c on the side surfaces between the support means 9, And the pin insertion holes 7c and 7c are formed at the upper and lower portions so as to be connected. A grip portion 5b is formed on a side surface between the support means 10 and the lower end 7b.

That is, the strut 3 is formed so that the upper strut 6 is slid with respect to the lower strut 7 and the length of the whole strut is adjusted so that the strut 3 extends horizontally across the pin insertion hole 6c and the pin insertion hole 7c. And the length thereof is maintained by inserting the pin 23a.

In this embodiment, the support means is provided at three places of the column 3, but the location and number of the columns are not limited to these, and can be suitably changed. The number of the pin insertion holes 6c and 7c and the installation location can be similarly changed.

The lower strut 7 is provided with a substrate 11 to close the lower end 7b and a pair of supporting pieces 12 and 12 having bolt insertion holes 12a and angle fixing holes 12b respectively Are mounted on the substrate 11 in a standing manner. The support pieces 12 and 12 are arranged so that the bolt insertion holes 12a and 12a and the angle fixing holes 12b and 12b are connected to each other and at a predetermined interval along the longitudinal direction of the column 3 And the angle fixing hole 12b for inserting the bolt 23b is formed at a distance of R1 from the center of the bolt insertion hole 12a (see FIG. 6). A nut 13b is fastened to the end portion of the bolt 13a inserted into the bolt insertion holes 12a and 12a and the stopper prevention pin 14 is attached.

The fixing portion 15 and the attaching portion 20 constituting the fixing means 4 will be described with reference to Figs. 4 and 5. Fig.

4, the fixing portion 15 has a substantially "C" shape when viewed from the side, and a clamp having two bolts 16, 16 screwed into the vicinity of the tip end of the upper portion 17a, And a connecting plate 19 connected to the back surface of the clamp 17 and provided with two male screws 18a and 18a so as to protrude to one side. The male screws 18a and 18a are arranged symmetrically with the center of the connecting plate 19 therebetween and at a distance R2 from the center, and also have nuts 18b and 18b, respectively.

The fixing portion 15 is not limited to such a structure. For example, the bolt may be used in place of the male screws 18a, 18a, and the bolt insertion hole may be formed in the connecting plate 19.

5, the attaching portion 20 includes a connecting plate 21 and an angle adjusting plate (angle adjusting plate) 22 (see FIG. 5) installed upright on one side of the connecting plate 21, ). A pair of elongated holes 21a and 21a along the rotational path of the radius R2 are symmetrical with respect to the connecting plate 21 with the angle adjusting plate 22 therebetween, (18a, 18a) can be inserted.

On the other hand, bolt insertion holes 22a having the same diameter as the bolt insertion holes 12a are formed in the center of the angle adjustment plate 22 in the width direction (direction parallel to the connection plate 21) 12b are formed at thirteen positions at intervals of 15 占 along the rotational locus of the radius R1 with the bolt insertion hole 22a as the center.

In addition, the angle fixing holes 22b and 22b at both ends are formed such that the straight line connecting the centers thereof is in parallel with the connecting plate 21. [ The attaching portion 20 is attached to the fixing portion 15 in such a manner that the centers of the connecting plate 19 and the connecting plate 21 are in contact with each other so that the back surfaces of the connecting plates 19 are in contact with each other, (See Fig. 2 (b)) by fastening the nut 18b to the nut 18a.

6 (a), the fixing means 4 includes a bolt insertion hole 22a (see FIG. 5 (b)) between the support pieces 12, 12 of the angle adjustment plate 22 of the attachment portion 20, ) Are arranged so as to be connected to the bolt insertion holes 12a and 12a (see Fig. 3 (c)), and bolts 13a are inserted into the holes to fasten the nut 13b horizontally, (3). At this time, the bolt 13a functions as a shaft body that is orthogonal to the longitudinal direction of the column 3 and connects the angle adjusting plate 22 to the support pieces 12, 12 so as to be rotatable , The fixing means 4 can rotate with respect to the column 3 as indicated by the arrow A in FIG. The clamp 17 is opened and closed in a direction orthogonal to the bolt 13a.

The bolts 23b are inserted into these three holes in a state in which one of the angle fixing holes 22b is connected to the angle fixing holes 12b and 12b (see Fig. 3 (c)) of the support pieces 12 and 12, The angle adjusting plate 22 is prevented from rotating relative to the supporting pieces 12 and 12 so that the fixing means 4 in the direction of the arrow A with respect to the supporting column 3 The rotation is constrained.

In this case, the angle fixing holes 12b and 12b, the angle fixing hole 22b and the bolt 23b function as an adjusting plate angle fixing means for fixing the angle adjusting plate 22 to the support 3 at a predetermined rotation angle. do.

The angle adjustment plate 22 is rotatable relative to the support pieces 12 and 12 by removing the bolts 23b from the angle fixing holes 12b and 12b and the angle fixing holes 22b, The angle between the opening and closing direction of the clamp 17 and the post 3 in the imaginary plane (contour plane) is made changeable. The bolts 23b are inserted into the angle fixing holes 12b and 12b and the angle fixing holes 22b to restrain the rotation of the angle adjusting plate 22 with respect to the supporting pieces 12 and 12, And the angle between the direction and the column 3 is fixed.

In this embodiment, by changing the combination of the angle fixing holes 12b and 12b for inserting the bolts 23b and the angle fixing holes 22b, the angular adjustment plate (not shown) 22 can be adjusted at intervals of 15 degrees, but the location and number of the angle fixing holes 12b are not limited to these, and can be changed appropriately.

On the other hand, if the nut 18b fastened to the male screw 18a is loosened, the male screw 18a can be moved within the range of the long hole 21a as shown by the arrow B in Fig. 6 (b) Is rotatable with respect to the connecting plate 21, the fixing portion 15 can rotate with respect to the support 3 as indicated by the arrow B in FIG. The rotation of the fixing portion 15 in the direction of the arrow B with respect to the column 3 is restricted by the constraint do.

In this case, the male screw 18a, the nut 18b and the long hole 21a function as a connecting plate angle fixing means for fixing the back surface of the clamp 17 to the connecting plate 21 at a predetermined rotation angle.

The connecting plate 19 is rotatable with respect to the connecting plate 21 by pulling the nut 18b fastened to the male screw 18a so that the clamp 17 projected on the virtual plane parallel to the connecting plate 21 The angle between the opening and closing direction and the column 3 can be changed. The rotation of the connecting plate 19 with respect to the connecting plate 21 is restricted by tightening the nut 18b with the male screw 18a so that the angle formed between the opening and closing direction of the clamp 17 and the column 3 is fixed Respectively.

In this embodiment, the rotation angle of the attachment portion 20 with respect to the fixing portion 15 can be adjusted within a range of 0 to 90 degrees, but the range of forming the long hole 21a is limited to this But you can change it appropriately.

The structure of the handrail member 2 will be described with reference to Fig. Fig. 7 (b) corresponds to a view showing a state in which the end portion is enlarged in Fig. 7 (a) and is cut into a plane including the central axis.

As shown in Figs. 7 (a) and 7 (b), the barrel member 2a has a structure in which the joint portions 24 are connected to both ends of a bar- Shaped outer member 33 and a tubular inner member 34 which is inserted so as to be slidable with respect to the outer member 33. [ A screw hole (not shown) is formed on the side surface of the outer member 33, and a thumbscrew 35 is screwed into the screw hole.

That is, in the free handrail 1a, the entire length of the handrail member 2 is easily adjusted by sliding the inner member 34 with respect to the outer member 33 in the state where the thumbscrew 35 is disengaged, Has the effect that the inner member (34) is slidably fixed with respect to the outer member (33) by pressing the side surface of the inner member (34) at its lower end by turning the outer member (35).

In this way, in the free handrail 1a, since the length of the handrail member 2 can be changed according to the interval at which the support posts 3 are provided, there is little restriction on the installation place of the support posts 3,

In the present embodiment, both the outer member 33 and the inner member 34 are in the form of a cylinder, but only the outer member 33 may have a cylindrical shape and the inner member 34 may have a solid structure. The spacing between the pillars 3 is unchanged after the pillars 3 are once installed so that the inner member 34 is arbitrarily slid without being fixed to the inner member 34 with respect to the outer member 33, There is no possibility that the length of the member 2 is changed. Therefore, the butterfly screw 35 may be omitted. However, in the same manner as in the present embodiment, it is safe that the structure provided with the thumbscrews 35 can be fixed so that the inner member 34 is not arbitrarily slid when the handrail member 2 is carried.

A connecting piece 2b is formed at both ends of the rod-shaped body 2a so as to protrude in the longitudinal direction. The connecting piece 2b is disposed opposite to the connecting piece 2b so as to be interposed therebetween A pair of connecting pieces 24a and 24a and a circular plate-shaped connecting piece 24b in which the connecting pieces 24a and 24a are installed upright. A shaft hole is formed in the connecting piece 2b and a shaft hole is formed in the connecting piece 24a so as to be connected to the shaft hole of the connecting piece 2b. The shaft member 25 is inserted into the yoke so that the connecting piece 2b and the connecting pieces 24a and 24a are connected to rotate about the shaft member 25. Thus, the joint portions 24 and 24 can rotate with respect to the rod-like body 2a.

That is, the handrail member 2 has an effect that the angle formed by the engaging piece 24b and the longitudinal direction of the rod-like body 2a in an imaginary plane parallel to the longitudinal direction of the rod-like body 2a is easily changed.

The engaging piece 24b is formed such that a peripheral edge thereof protrudes sideways with respect to the connecting pieces 24a and 24a when viewed in plan view.

Next, the supporting means 9 used for connecting the handrail member 2 to the support 3 will be described with reference to Figs. 8 and 9. Fig. 8 (b) shows a state in which the releasing restricting portion 27 is lowered in FIG. 8 (a) and the paring member 2 is sandwiched between the releasing preventing portion 28 and FIG. 8 (a) Of the lower support 7 in a plane including the central axis.

The supporting means 10 has the same structure as that of the supporting means 9 and the description of the supporting means 8 is the same as that of the supporting means 9 except that the lower supporting column 7 is replaced with the upper supporting column 6 Therefore, the following description will be made using the supporting means 9 as an example, and the description of the supporting means 8 and 10 will be omitted.

The supporting means 9 includes a male screw portion 26 formed on a part of the outer circumferential surface 7d of the lower support 7 and a male screw portion 26 formed on the outer circumferential surface thereof with screw- Shaped dropout chamber 27 fixed to the outer circumferential surface 7d of the lower strut 7 and disposed below the male threaded portion 26 so as to face the dropout stopper 27, And is constituted by the earth 28. A ring-shaped concave groove (not shown) is formed along the outer circumferential surface 7d of the lower strut 7 on the opposed surface 28a of the take-off reel 28 and the opposed surface 27a of the take- (27b, 28b) can be engaged with the engaging piece (24b), respectively.

In the present embodiment, although the dropping prevention zone 27 is screwed to the male screw portion 26 and the dropping prevention zone 28 is fixed to the outer peripheral surface 7d of the lower support 7, At least one (one) of the projecting portions 27 and 28 may be screwed to the male screw portion 26. [ The concave groove may be formed on at least one of the opposed surfaces 27a and 28a.

The joint portion 24 of the handrail member 2 is formed so that the shaft member 25 is parallel to the axial direction of the lower support 7 and the lower portion of the engagement piece 24b is in the concave groove 8b so that the upper portion of the engaging piece 24b is engaged with the concave groove 28b as shown in Fig. 8 (b) The joint portion 24 is supported in such a manner that the joint portion 24 can not be separated by the release projections 27 and 28. In this case, At this time, since the connecting pieces 24a, 24a are brought into contact with the opposing surfaces 27a, 28a of the releasing restricting portions 27, 28, the joint portion 24 is prevented from rotating about the central axis of the engaging piece 24b do.

On the other hand, since the connecting piece 2b is rotatable about the shaft 25 with respect to the connecting pieces 24a and 24a, the rod-shaped body 2a is in contact with the lower column (Fig. 9 7 in the axial direction.

When the engaging state of the engaging piece 24b with respect to the concave grooves 27b and 28b is released by rotating the releasing rest 27 in this state by rotating the releasing restricting part 27, And becomes releasable.

9 (b), the joint portion 24 of the handrail member 2 is formed so that the shaft member 25 is orthogonal to the axial direction of the lower support 7 and the lower portion of the engagement piece 24b is the concave groove 28b so that the upper portion of the engaging piece 24b is engaged with the concave groove 27b by rotating the take-away stop 27, The joint portion 24 is supported by the releasing regions 27 and 28 so as not to be detachable. In this case, however, the rod-like body 2a becomes rotatable in the plane including the central axis of the lower strut 7 as indicated by the arrow D2.

The angle of the opening and closing direction of the clamp 17 and the longitudinal direction of the column 3 in the plane perpendicular to the bolt 13a and the angle of the clamp 17 projected on the plane parallel to the connecting plate 21 And the angle formed by the bolt 13a can be adjusted. Therefore, it is possible to attach the members of the stepped stairs S other than the plate P to a thickness that can be held by the clamp 17.

The distance between the longitudinal direction of the strut 3 and the rotational plane of the joint portion 24 can be changed by changing the distance between the opposed surfaces 27a and 28a when the joint portion 24 is supported by the drop- So that it is possible to adjust the angle of the angle. Therefore, the handrail member 2 can be connected to the support 3 in a desired direction. Further, the supporting means 8 to 10 can be commonly used for a plurality of the handrail members 2 having different sizes (diameters) of the engaging pieces 24b.

As described above, in the free rail 1a of the present invention, the pillars 3 can be provided in the vertical direction irrespective of the posture of the object held by the clamp 17. Further, the connecting direction of the railing member 2 with respect to the support 3 is not limited. That is, since the free handrail 1a has few restrictions on the installation place of the post 3, it can be attached to a conventional stair step or a foot step. The connection or disconnection of the rail member 2 to the support post 3 and the connection or disconnection of the support post 3 can be prevented by simple operation such as rotation of the dropout stopper 27 or the nut 18b and tightening or loosening of the bolt 23b, It is possible to adjust the attachment posture of the clamp 17 in accordance with the installation target of the clamp 17. Therefore, in the free handrail 1a, the installation work can be made easily and safely. Also, it is easy to manufacture because it is a simple structure composed of two kinds of members, i.e., the railed member 2 and the support column 3. Also, when not used, the handrail member 2 and the column 3 can be disassembled, so that the handrail can be easily carried. The fixing means 4 and the supporting means 8 to 10 are also simple and lightweight. Therefore, the transportation cost and the manufacturing cost can be reduced.

Example 2

The free handrail of the second embodiment will be described with reference to Figs. 10 and 11. Fig.

Fig. 10 corresponds to Fig. 1, but the handrail member 2 is omitted from the drawing. 11 (a) to 11 (d) are sectional views taken along line E-E, line L-F, line L-G, Fig. 7 is an enlarged view of a part of a cross section viewed from an arrow. 1 to 9 are denoted by the same reference numerals, and a description thereof will be omitted.

10 and 11, the free handrail 1b according to the present embodiment has a width 29 in the free handrail 1a according to the first embodiment, And a support frame (30) for attaching to the lower support (7).

The branch 29 has a rectangular shape in plan view and has a structure in which prismatic flat plates 29b and 29c extend from one end of the flat plate members 29a and 29a . The flat plate material 29a is welded to the flat plate members 29b and 29c with one end thereof inserted. The flat plate material 29c is inserted at one end so as to be slidable with respect to the flat plate material 29b.

The support frame 30 is formed in a flat prismatic shape so that one end of the flat plate material 29a can be inserted and fixed to the outer peripheral surface 7d by screws 32 in parallel with the axial direction of the lower support 7 Respectively.

11 (a) and 11 (c), the flat plate member 29a is held in a state in which the flat plate frame 31 is attached to the end portion as a spacer Is inserted into the frame (30).

The free parapet 1b having the above structure has an effect that the entire length of the width 29 is adjusted by sliding the flat plate material 29c relative to the flat plate material 29b. Therefore, unlike the case where the entire length of the branch 29 is fixed, the constraint on the spacing of the column 3 is small.

Example 3

The free parapet according to the third embodiment will be described with reference to Figs. 12 to 17 (specifically, claims 3 and 5 ).

13 (a) is a front view of a handrail member 36 constituting a free handrail 1c, and Fig. 13 (b) is a front elevation view of a handrail 1c of the present embodiment. Fig. 13A is an enlarged view of an end portion of the handrail member 36 viewed from the direction I, and FIG. 13C is a sectional view taken along the line J-J in FIG. 14A and 14B are respectively a side view and a front view of the connector 38 and FIG. 14C is a sectional view taken along the line K-K in FIG. 14B . In Figs. 13 (c) and 14 (c), the hatched portions indicating the cross section of the butterfly screw 35 and the spring 40c are omitted.

15 (a) and 15 (b) are a side view and a plan view of the connecting ring 41, and Fig. 15 (c) Fig. FIG. 16 is an enlarged view of the fixing means 37 in FIG. 12, and FIG. 17 is a view seen in the direction of arrow L in FIG. Fig. 18 (a) is a sectional view taken along the line M-M in Fig. 16, and Fig. 18 (b) is a perspective view showing the appearance of each component assembled to the shaft 49. Fig.

15C is a plan view showing a plane including both the axis of the column 3 and the axis of the parapet member 36 with respect to a part of the leaving zones 27 and 28 and the connecting hole 38 and the connecting ring 41. [ As shown in Fig. 18 (a), the attachment portion 43 and the fixing portion 42 are omitted from the drawing. 1 to 11 are denoted by the same reference numerals, and a description thereof will be omitted.

As shown in Fig. 12, the free handrail 1c according to the present embodiment has the handrail member 36 and the fixing means 4 instead of the handrail member 2 and the fixing means 4 in the free handrail 1b according to the second embodiment, (37).

As shown in Figs. 13 (a) and 13 (b), the handrail member 36 includes a bar-shaped body 36a made of metal and a bar- And a pair of connecting pieces 36b and 36b. The connecting pieces 36b and 36b are disposed so as to be opposed to each other so as to be interposed between connecting portions 38b (see Fig. 14) of the connecting holes 38 described later. The connecting pieces 36b and 36b are formed with shaft holes 39b and 39b so as to be connected to the shaft hole 39a formed in the connecting portion 38b of the connecting hole 38. [

The rod-like body 36a is constituted by a tubular outer member 33 and a tubular inner member 34 which is inserted so as to be slidable with respect to the outer member 33. [ As shown in Fig. 13 (c), a thumbscrew 35 is screwed into the screw hole 33a formed in the side surface of the outer member 33, and on the surface of the inner member 34, (34a) can be engaged with the tip end of the thumbscrew (35). That is, the outer member 33 and the inner member 34 are structured such that the relative rotation around the cylindrical shaft is prevented by engaging the tip end of the thumbscrew 35 screwed into the screw hole 33a with the engaging groove 34a .

The front end portion of the thumbscrew 35 is engaged with the engaging groove 34a of the inner member 34 so that only the movement in the longitudinal direction is permitted to the outer member 33 and the inner member 34 The rotation of the cylindrical shaft is prevented, but the free guardrail of the present invention is not limited to such a structure.

For example, a bolt or the like may be used instead of or in combination with the thumbscrew 35. And the bolt or the like is screwed into the screw hole 33a and the leading end thereof is coupled to the coupling groove 34a of the inner member 34, Rotation is more effectively prevented.

As shown in Figs. 14 (a) to 14 (c), the connector 38 has a structure in which a plate-like connection portion 38b is formed at one end of a rod-shaped insertion portion 38a, It is approximately L-shaped when viewed. The connection portion 38b is formed with a shaft hole 39a as described above and a concave groove 40a is formed in the vicinity of the tip end of the insertion portion 38a along the longitudinal direction. The concave groove 40a is provided with a coupling piece 40b and a spring 40c for pressing the coupling piece 40b in a direction to extrude the coupling piece 40b. That is, the engaging piece 40b is formed inside the concave groove 40a so as to be pressed by the spring 40c and partly protruding and retracting.

As shown in Figs. 15 (a) and 15 (b), the connecting ring 41 includes a coupling piece 41a formed so as to form a part of an arc when viewed in a plan view, And a support portion 41b for supporting the insertion portion 38a of the connector 38 so as to be rotatable is connected via the connection portion 41c.

The insertion portion 38a of the connection port 38 connecting the connection pieces 36b and 36b of the rod-like body 36a to the connection portion 38b is connected to the support portion 41b of the connection ring 41 as shown in Fig. 15 (c) And the engaging piece 41a of the connecting ring 41 is formed on the opposing face 28a of the releasing rest 28 so that the lower portion thereof is engaged with the recessed groove 28b, So that the threaded engagement projection 27 is rotated so that the upper portion of the engagement piece 41a is lowered until it is engaged with the recessed groove 27b. As a result, the connecting ring 41 is not releasably supported by the releasing restricting walls 27 and 28 so that the barrel member 36 is supported by the shaft hole 39a of the connecting hole 38 and the supporting portion 4lb of the connecting ring 41 Respectively.

At this time, the engaging piece 40b is engaged with the connecting ring 41 to prevent the insertion portion 38a of the connecting hole 38 from coming off from the supporting portion 41b of the connecting hole 41. [ In this state, when the engaging piece 40b is pressed into the concave groove 40a by resisting the spring 40c, the engaging piece 40b is not engaged with the supporting portion 41b, So that it can be easily released from the support portion 41b.

The releasing restricting portions 27 and 28 constituting the supporting means 8 to 10 are structured so as to be able to connect at least two handrail members 36 respectively.

In the free guardrail 1c of such a structure, the connection 38 can be easily connected to or disconnected from the connection ring 41. In addition, in the free rail 1a of the first embodiment, since the handrail member 2 is rotatable only about the center axis of the connecting piece 2b, the rotational plane of the handrail member 2 is, It is necessary to change the interval between the leaving region 27 and the leaving region 28 when switching from a state parallel to the longitudinal direction to a state orthogonal to the longitudinal direction. On the other hand, in the free handrail 1c of the present embodiment, the handrail member 36 is disposed around two mutually orthogonal axes, that is, the central axis of the connecting piece 2b and the central axis of the inserting portion 38a of the connecting hole 38 So that the rotation plane of the railing member 36 can be changed from a state parallel to the longitudinal direction of the column 3 to a state orthogonal to each other You do not need to work.

Next, the fixing portion 42 and the attaching portion 43 constituting the fixing means 37 will be described with reference to Figs. 16 to 18. Fig.

As shown in Fig. 16, the fixing portion 42 has a clamp having a substantially " C " shape when viewed from the side, and is fixed to the back surface by bolts so that the fixing portion 43 can rotate have. A plurality of bolt insertion holes are formed on the back surface of the fixing portion 42 so as to adjust the rotation angle of the mounting portion 43 in the same manner as the fixing portion 15 with respect to the mounting portion 20 of Embodiment 1 have.

The attaching portion 43 is provided with a connecting plate 44 and an angle adjusting plate 45 provided on the one surface of the connecting plate 44 so as to pass the center thereof and having a male threaded portion 45b formed on the arc- Consists of. A pair of long holes along a rotational locus of a predetermined radius are symmetric with respect to the angle adjusting plate 45 and a bolt 47 for attaching to the fixing portion 42 can be inserted into the connecting plate 44 Respectively. A shaft member 46 formed so as to be inserted into a through hole formed at a substantially central portion of the back surface of the fixing portion 42 projects in a direction opposite to the angle adjusting plate 45 at the center of the connecting plate 44 Respectively.

On the other hand, in the angle adjusting plate 45, a through hole for inserting the bolt 13a is formed substantially in the center in the width direction (the direction parallel to the connecting plate 44), and the through hole for inserting the bolt 23b (45a) are formed. The angle fixing hole 45a is formed substantially in the shape of a slot along a rotation locus having a predetermined radius around the insertion hole of the bolt 13a.

The angle fixing hole 45a is formed so that a straight line connecting the start point and the end point is parallel to the connecting plate 44. [ The attaching portion 43 is formed in such a manner that the tip end of the shaft body 46 projecting from the connecting plate 44 is inserted into the through hole formed in the back surface of the fixing portion 42 so as to be rotatable, And is fixed by tightening the bolts 47 inserted in the holes.

Therefore, when the bolt 47 is loosened, the fixing portion 42 is moved in the direction of the center of the shaft 46 with respect to the connecting plate 44 in the range that the bolt 47 can move within the slot formed in the connecting plate 44 So that the fixing portion 42 can rotate with respect to the support 3. On the other hand, when the bolt 47 is tightened, the fixing portion 42 can not rotate with respect to the connecting plate 44, and the rotation of the fixing portion 42 relative to the column 3 is restricted.

In this case, the bolts 47 and the long holes of the connecting plate 44 function as connecting plate angle fixing means for fixing the back surface of the fixing portion 42 to the connecting plate 44 at a predetermined rotation angle.

17 and 18, a bolt insertion hole 48a and a fixing hole 48b for inserting the bolts 13a and 23b and a support for supporting the shaft 49 so as to be rotatable are formed on the base plate 11, And a pair of support pieces 48, 48 each formed with a hole 48c are formed upright.

The shaft 49 has a structure in which male threaded portions 49b and 49c are formed at both ends of respective main portions (prismatic portions) 49a having a hexagonal cross section. The gear support member 50 and the spring support member 51 are inserted into the respective main portions 49a and the nut members 53 and 53 are screwed to the male screw members 49b and 49c A washer 54 is provided between the gear support member 50 and the nut 53 and between the spring support member 51 and the engagement member 52. [

The gear support member 50 includes an engagement portion 50a having an outer shape and an outer shape contoured respectively in a circular or hexagonal shape and a rectangular plate shaped engagement portion 50b provided in a standing manner on the engagement portion 50a The engaging portion 50a is not rotatable with respect to the shaft 49 when the engaging portion 50a is inserted into each of the main portions 49a and the engaging portion 50b is engaged with a part of the inner wall of the supporting piece 48, 48 so as not to be rotatable.

The spring retainer 51 has an engagement portion 51a having an outer shape and an outer shape contoured respectively in a circular or hexagonal shape and a stepped portion 51b provided at one end of the engagement portion 51a, (Step attachment portion) 5lb and is provided so as not to be rotatable with respect to the shaft 49 when the fitting portion 51a is inserted into each of the main portions 49a.

The side surface 55a having minute concave and convex portions can be brought into contact with the end surface of the end attachment portion 51b of the spring support member 51 and the angle adjusting plate 45 can be brought into contact with the engagement surface 50a of the gear support member 50, And the gear 55 is inserted from the outside so as to be rotatable in engagement with the male thread portion 45b.

A coil-shaped pressing spring 56 is inserted between the inner wall surface of the supporting piece 48 and the stepped portion 51b so as to be inserted into the fitting portion 51a of the spring retainer 51 from the outside So that the spring support member 51 can be pressed in a direction to press against the gear 55. [

In the free handrail 1c having such a structure, the engaging portion 50b is engaged with a part of the inner wall of the supporting piece 48 to rotate the shaft 49 together with the engaging portion 50a with respect to the supporting piece 48 . In this case, the spring retainer 51 and the pressure spring 56 function as a means for generating a frictional force between the spring retainer 51 and the side surface 55a of the gear 55 to suppress the rotation thereof. The spring retainer 51 is urged against the gear 55 by pressing the spring retainer 51 in the direction of pressing the spring retainer 51 against the gear 55 by rotating the retainer 52, The effect of suppressing the rotation of the gear 55 is further exerted because it is directly applied to the gear 55 by the waveguide 52. [ Further, as the spring support member 51 is advanced in the direction of pressing the gear 55 by operating the wave guide member 52, the force for restricting the rotation of the gear member 55 becomes stronger. Finally, the gear 55 is completely in a non-rotatable state.

That is, the shaft 49, the spring retainer 51, the waveguide 52, and the pressure spring 56 are used as an adjusting plate angle fixing means for fixing the angle adjusting plate 45 to the support 3 at a predetermined rotation angle Function.

When the angle of rotation of the angle adjusting plate 22 with respect to the column 3 is changed in the free railings 1a and 1b according to Embodiment 1 or 2, the bolts 23b are attached to the angle fixing holes 22b, Must be inserted and changed. On the other hand, in the free rail 1c of the present embodiment, there is provided an effect that the rotation angle of the angle adjusting plate 45 with respect to the column 3 is continuously changed without changing the bolt 23b by inserting the bolt 23b . Therefore, the work efficiency is good.

The rotation of the gear 55 rotating in engagement with the male screw portion 45b of the angle adjusting plate 45 is suppressed by the spring retainer 51 and the urging spring 56 so that the fixing means 37 ) Is controlled. In this case, it is safe because it is possible to prevent accidents such as the sudden collapse of the column 3 in the middle in the operation of installing the fixing means 37 on a stair step or the like.

The invention described in claims 1 to 5 can be applied to a stair step or a temporary stool installed on a construction site or a construction site.

1a: Free Railing
1b: Free Railing
1c: Free Railing
2: Railing member
2a:
2b: Connection
3: Holding
4: Fixing means
5a:
5b:
6: Upper support
6a: Top
6b: bottom
6c: Pin insertion hole
7: Lower strut
7a: Top
7b: bottom
7c: Pin insertion hole
7d: outer peripheral surface
8: Supporting means
9: Supporting means
10: support means
11: substrate
12:
12a: Bolt insertion hole
12b: Angle fixing hole
13a: Bolt
13b: nut
14:
15:
16: Bolt
17: Clamp
17a:
18a: male thread
18b: nut
19: Connection plate
20:
21: Connection plate
21a: Long hole
22: Angle adjustment plate
22a: Bolt insertion hole
22b: Angle fixing hole
23a: pin
23b: Bolt
24:
24a: Connection
24b:
25: Shaft
26: Male threads
27: Exit to Earth
27a: opposite face
27b: concave groove
District 28:
28a: opposite face
28b: concave groove
29: Wicket
29a: Plate material
29b: Plate material
29c: Plate material
30: Support frame
31: Flat plate frame
32: Screw
33: outer member
33a: Screw hole
34: inner member
34a: Coupling groove
35: thumbscrew
36: Railing member
36a:
36b: Connection
37: Fixing means
38: connector
38a:
38b:
39a: Football Halloween
39b: football bruise
40a: concave groove
40b:
40c: spring
41: connecting ring
41a:
4lb: Support
41c:
42:
43:
44: connection plate
45: Angle adjustment plate
45a: Angle fixing hole
45b: male threads
46:
47: Bolt
48:
48a: Bolt insertion hole
48b: Angle fixing hole
48c: Support hole
49: Shaft
49a: Each housewife
49b: Male threads
49c:
50: Gear geared earth
50a:
50b:
51: Springfield
51a:
5lb:
52: Earth District
53: Nut
54: Washer
55: gear
55a: side
56: Pressurizing spring
S: Hypothesis staircase
P: Response

Claims (8)

A free handrail attached to a plate material constituting a tread plate P or a floor plate of a hypothetical stair S,
(2) having a connecting piece (2b) formed at both ends so as to protrude in the longitudinal direction and made of a rod-like body (2a)
A rod-shaped support column 3 having a circular outline of a cross section,
(Fixing means) 4 attached to the lower end of the column 3 and having a clamp 17 for clamping the plate,
A support means (support means) 8 provided on the support column 3 and to which one end of the handrail member 2 is connected ,
A support piece (support piece) 12 formed to protrude downward at the lower end of the strut 3,
A first shaft body (first shaft body) 13a perpendicular to the longitudinal direction of the strut 3
Respectively,
As the fixing means (4)
An angle adjusting plate (22) connected to the supporting piece (13) so as to be rotatable through the first shaft body (13a)
A connecting plate (linking plate) 21 which is installed upright on the angle adjusting plate 22 and is in parallel with the first shaft member 13a,
A connecting plate angle fixing means (connecting plate angle fixing means) for fixing the back surface of the clamp 17 to the connecting plate 21 at a predetermined rotation angle
Free ledge (1a), characterized in that installed.
The method according to claim 1,
The handrail member (2)
And a joint part 24 connected to the connecting piece 2b so as to be rotatable in an imaginary plane parallel to the longitudinal direction of the bar-shaped body 2a and having a coupling piece 24b formed therein,
The supporting means (8)
A first leaving zone 27 and a second leaving zone 28 arranged to face each other,
And a male threaded portion 26 formed on a part of the outer peripheral surface of the strut 3
Lt; / RTI &
One of the first take-off part 27 and the second take-off part 28 is screwed to the male screw part 26 and the other is screwed to the outer peripheral surface of the support 3 And a concave groove (27b, 28b) is formed on at least one of the opposed surfaces (27a, 28a) so as to engage with the engaging piece (24b). ).
3. The method of claim 2,
Instead of the joint portion 24,
A connecting portion 38b having a planar shape formed at one end of a bar-shaped insertion portion 38a and a substantially L-shaped connecting portion 38 seen from the side,
A supporting portion (supporting portion) 4lb for supporting the inserting portion 38a so as to be rotatable about the central axis is provided on the engaging piece 41a formed so that the outer shape forms a part of an arc when viewed from the plane, (41) to which a connecting ring
Respectively,
The handrail member 36 is connected to the connecting piece 36b so that the connecting portion 38b of the connecting hole 38 can be rotated instead of the connecting portion 24,
The coupling ring 41 is engaged with the concave grooves 27b and 28b in a state where the coupling piece 41a is inserted into the first take-off re- movment part 27 and the second take- (1c). ≪ / RTI >
4. The method according to any one of claims 1 to 3 ,
The supporting piece (12)
A first insertion hole 12a into which the first shaft 13a is inserted,
The first angle fixing hole 12b, which is formed at a predetermined interval from the first insertion hole 12a along the longitudinal direction of the column 3 and into which the second shaft member 23b is inserted,
Respectively,
The angle adjusting plate (22)
A second insertion hole 22a into which the first shaft member 13a is inserted in a state of being connected to the first insertion hole 12a,
And a plurality of second angle fixing holes 22b formed at substantially equal intervals along a rotation locus of a predetermined radius around the second insertion hole 22a
Respectively,
The plurality of second angle fixing holes 22b are formed so as to be able to insert the second shaft member 23b in a state where the second angle fixing holes 22b are connected to the first angle fixing holes 12b,
The fixing means (4)
Is attached to the angle adjusting plate (22) so that the opening and closing directions of the clamp (17) are orthogonal to the first shaft body (13a).
4. The method according to any one of claims 1 to 3 ,
The support piece (48)
A first insertion hole 48a into which the first shaft 13a is inserted,
The first angle fixing hole 48b, which is formed at a predetermined interval from the first insertion hole 48a along the longitudinal direction of the strut 3 and into which the second shaft member 23b is inserted,
Respectively,
The angle adjusting plate (45)
A second insertion hole into which the first shaft member 13a is inserted in a state of being connected to the first insertion hole 48a,
And a second angle fixing hole 45a formed in a long hole shape along a rotational locus having a predetermined radius around the second insertion hole
A male screw portion 45b is formed on a side surface of the circular arc,
In the supporting piece 48,
A gear 55 engaged with the male screw portion 45b of the angle adjusting plate 45 and rotating,
(Rotation restraining means) for generating a frictional force between the gear 55 and the side surface of the gear 55
Installed,
The fixing means (37)
Is attached to the angle adjusting plate (45) so that the opening and closing directions of the clamp are orthogonal to the first shaft member (13a). delete delete delete

Images