JP2009068297A - Stairway and handrail fixing structure, and stairway structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stairway and handrail fixing structure having an improved appearance, and to provide a stairway structure. <P>SOLUTION: The fixing structure of a stairway and a handrail 50 is provided for fixing a handrail supporting column 51 to tread 20 constituting the stairway. Herein, a reinforcing base member 30 is inserted into a hollow portion 22a of the tread 20 formed of a hollow shaped material, a rod-like fixing member 55 is passed through the tread 20 and the reinforcing base member 30 at their lower sides and mounted therein so that its upper end is protruded upward from the upper face of the tread 20, and an upper end protrusion 56 of a fixing member 55 is threaded to the lower end of the handrail supporting column 51 to fix the handrail supporting column 51 to the tread 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fixing structure for a staircase and a handrail and a staircase structure.

  In recent years, in buildings such as houses and cottages, there is a demand for lightweight and corrosion-resistant staircase structures installed inside or outside the building. For example, Patent Document 1 or Patent Document 2 discloses a staircase structure that satisfies this requirement.

JP 2003-147926 A JP 2003-138713 A

  By the way, it is common to install handrails on stairs. There are various ways to fix the handrail to the stairs, but in the staircase structure in which the tread is formed to protrude outward from the side girders as disclosed in Patent Document 2, the handrail support column is attached to the tread. The effective width of the stairs can be increased.

  However, in the staircase structure disclosed in Patent Document 2, as shown in FIG. 7, the small palate 101 is fixed to the small edge of the end surface of the tread plate 100, and the handrail is inserted into the insertion portion 102 formed on the small lid 101. The lower end portion of the support column 103 is inserted and fixed with a fastener such as a bolt B. Therefore, the insertion portion 102 of the handrail support column 103 protrudes outward, the surface of the small palate 101 becomes uneven, the bottom portion of the handrail support column 103 is exposed downward, and the fastening bracket such as the bolt B is exposed on the side surface. There was a problem that the appearance deteriorated.

  Then, this invention is made | formed in view of this problem, and it aims at providing the fixing structure and staircase structure of the staircase and handrail which can obtain the outstanding external appearance.

  In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a stiffening structure of a staircase and a handrail for fixing a handrail strut to a stepboard constituting a staircase, and a reinforcing base is provided in a hollow portion of the treadle made of a hollow shape member. Insert a member, and attach a rod-shaped fixing member from below the tread plate and the reinforcing base member so that the upper end protrudes upward from the upper surface of the tread plate, and the upper end protruding portion of the fixing member Are fixed to the bottom plate of the handrail post so that the handrail post is fixed to the tread.

  According to such a configuration, the fixing member is not conspicuous because it is inserted from the lower side of the tread board, and the handrail support post is fixed to the upper surface of the tread so that the handrail support insertion part is provided at the end of the tread board. Since it is not necessary and the end portion of the tread can be made flat, a clean and excellent appearance can be obtained. Moreover, since the handrail support | pillar is directly being fixed to the tread board via the fixing member, the fixed strength with a tread board can be raised. In addition, since the stress applied to the handrail post can be supported by the reinforcing base member, the fixing strength of the handrail post and the tread board and the strength of the tread board can be further increased.

  The invention according to claim 2 is characterized in that the tread is spanned and fixed to a pair of side girders, and both ends thereof protrude outward from the pair of side girders, and the reinforcing base member is the tread The stairway and handrail fixing structure according to claim 1, wherein the staircase and the handrail are fixedly extending from an end portion of the staircase to a fixing portion to the side beam.

  According to such a configuration, since the stress applied to the handrail post is transmitted to the side beam via the reinforcing base member, it can withstand more stress and further enhance the fixing strength of the handrail post and the treadle. Can do.

  According to a third aspect of the present invention, a concave groove or a ridge for positioning the reinforcing base member is formed on the inner surface of the hollow portion of the tread, and the concave surface corresponds to the concave groove on the outer surface of the reinforcing base member. 3. The staircase and handrail fixing structure according to claim 1 or 2, wherein a ridge or a groove corresponding to the ridge is formed.

  According to such a configuration, the concave groove and the protruding line mesh with each other, so that the positioning when the reinforcing base member is inserted into the hollow portion of the tread can be easily performed, and the reinforcing base member is fixed after the insertion. Fixed in position. Further, the concave grooves and the ridges serve as reinforcing ribs, and the strength of the tread can be increased.

  The invention according to claim 4 is characterized in that the tread has at least two ribs therein, and the reinforcing base member is inserted into a hollow portion between the ribs. 3. The structure for fixing a staircase and a handrail according to any one of items 3 to 3.

  According to such a structure, the positioning at the time of inserting a reinforcement base member in the hollow part of a tread can be easily performed by inserting a reinforcement base member between ribs. Moreover, the strength of the tread can be increased by the ribs.

  The invention according to claim 5 is the staircase and handrail fixing structure according to any one of claims 1 to 4, wherein the tread is made of an extruded shape member made of aluminum. is there.

  According to such a configuration, it is possible to easily manufacture a tread having a complicated shape by simply cutting the extruded shape member with an appropriate length. Moreover, since the extruded shape made of aluminum has high dimensional accuracy and is light in weight, it can be easily handled on site.

  The invention according to claim 6 is the staircase according to any one of claims 1 to 5, wherein the reinforcing base member is formed of an extruded aluminum member having a hollow portion. And a handrail fixing structure.

  According to such a configuration, the extruded shape member made of aluminum has high dimensional accuracy and is lightweight for its strength, so that it can be easily handled on site.

  In the invention according to claim 7, a pair of side girders arranged at a predetermined interval in the width direction of the stairs is fixed by bridging a tread made of a hollow material, and in the hollow portion of the tread, A reinforcing base member is inserted, and a rod-shaped fixing member is inserted from below the tread plate and the reinforcing base member so that its upper end protrudes upward from the upper surface of the tread plate, and the upper end of the fixing member It is a staircase structure characterized in that a protruding portion is screwed to a lower end portion of a handrail support column and the handrail support column is attached to the tread.

  According to such a configuration, the fixing member is not conspicuous because it is inserted from the lower side of the tread board, and the handrail support post is fixed to the upper surface of the tread so that the handrail support insertion part is provided at the end of the tread board. Since the end of the tread board can be made flat without being necessary, a stair structure having a clean and excellent appearance can be provided. Moreover, since the handrail support | pillar is directly being fixed to the tread board via the fixing member, the fixed strength with a tread board can be raised. In addition, since the stress applied to the handrail post can be supported by the reinforcing base member, the fixing strength of the handrail post and the tread board and the strength of the tread board can be further increased.

  In the invention according to claim 8, both ends of the tread plate protrude outward from the pair of side girders, and the reinforcing base member extends from an end portion of the tread plate to a fixed portion to the side girder. The staircase structure according to claim 7, wherein the staircase structure is configured as described above.

  According to such a configuration, the stress applied to the handrail post is transmitted to the side girders via the reinforcing base member, so that it can withstand more stress, and the fixing strength between the handrail post and the footboard can be further increased. A staircase structure can be provided.

  According to the present invention, it is possible to provide a staircase and handrail fixing structure and a staircase structure capable of providing an excellent appearance.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, a staircase structure provided on a balcony installed adjacent to a building such as a house or a cottage will be described as an example.

(balcony)
A schematic configuration of the balcony on which the staircase structure is installed will be described with reference to FIG. As shown in FIG. 6, the balcony 10 is provided so as to be accessible from the second floor of a building 11 such as a cottage. The balcony 10 includes a flooring 12, a truss structure 13 disposed below the flooring 12, and a column 14 that supports the flooring 12 and the truss structure 13. A handrail 19 is provided on the outer peripheral edge of the flooring 12.

  The truss structure 13 includes a top frame 15 formed by connecting a plurality of upper chord members 15a, 15a... And a lower frame 16 formed by connecting a plurality of lower chord members 16a, 16a. 17 and 17 are connected to each other. A long reinforcing member 18 is provided below the outer peripheral edge of the lower surface frame 16 along the longitudinal direction of the lower chord material 16a. The reinforcing member 18 is bridged and fixed between the adjacent columns 14 and 14.

(Stair structure)
The staircase structure 1 according to the present invention is provided for ascending and descending on the flooring 12 of the balcony 10 from another floor level such as the ground, and includes a step board 20 and side girders 40 that support the step board 20. And a handrail 50 for stairs.

  The handrail 50 includes a handrail column 51 fixed to the tread plate 20, a handrail portion 52 provided between adjacent handrail columns 51, 51, and a lattice portion 53 between the handrail columns 51, 51. .

  The handrail column 51 is erected and fixed on the tread plate 20 at a predetermined pitch. In the present embodiment, the handrail support column 51 is fixed to the upper surface of both end portions of the tread plate 20 in every three steps of the tread plate 20. The handrail portion 52 is bridged from the handrail support column 51 at the upper end to the handrail support column 51 at the lower end, and is supported by the handrail support columns 51, 51.

  The side girders 40 are arranged so as to be inclined according to the gradient of the stairs, and are respectively provided on both sides in the width direction of the stairs so as to be parallel to each other with a predetermined interval. As shown in FIGS. 1 (a) and 1 (b), the side beam 40 is made of an aluminum (aluminum simple substance or aluminum alloy) extruded section having a vertically long rectangular cross section, and a reinforcing rib is formed in the inside thereof. 41 is formed along the longitudinal direction. The reinforcing rib 41 is provided at the intermediate portion in the height direction of the side beam 40.

  As shown in FIG. 6, the side beam 40 is connected to a base plate 70 whose lower part is fixed to the foundation K by bolts B and nuts (not shown). In the present embodiment, the foundation K on which the side girders 40 are fixed has the support height of the side girders 40 determined according to the difference between the ground height of the land and the height of the balcony 10. The installation level can be adjusted to a certain height distance from the balcony 10. According to such a configuration, the dimensions of the side beam 40 and the handrail 50 can be unified, and productivity can be improved.

  As shown in FIGS. 1A and 1B and FIG. 6, the upper part of the side beam 40 is connected to and supported by the reinforcing member 18. Specifically, a support shoe 71 for fixing the side beam 40 is provided on the side surface of the reinforcing member 18, and a bracket 72 is provided below the upper end of the side beam 40. , And are connected via a joint material 73.

  As shown in FIGS. 1A and 1B, the support shoe 71 is attached to the back surface of the groove-shaped member 18 a of the reinforcing member 18. The support shoe 71 includes a base portion 71a that contacts the back surface of the groove-shaped member 18a, and a pair of clamping plates 71b and 71b that clamp the joint material 73 from both sides in the thickness direction. A through hole 71c through which a bolt B for fixing to the reinforcing member 18 is inserted is formed in the base portion 71a. The sandwiching plates 71b and 71b are arranged with an interval corresponding to the thickness of the joint material 73, and a through-hole 71d through which a bolt B for fixing the joint material 73 is inserted is formed at an intermediate portion in the height direction. ing. Here, since the joint material 73 is fixed to the support shoe 71 with a single bolt B, the joint material 73 can rotate around the bolt B. Thereby, the vibration of the staircase structure 1 and the thermal contraction of the side beam 40 and the column 14 can be absorbed.

  The bracket 72 is composed of a pair of plate materials 72a and 72a that sandwich the side beam 40 and the joint material 73 from both sides in the thickness direction. In the plate material 72a, a portion that comes into contact with the side beam 40 and a portion that comes into contact with the joint material 73 are integrally formed via a stepped portion 72b. A plurality of through holes 72c and 72c for bolts B and B for holding the side beam 40 and the joint material 73 are formed in the portion that contacts the side beam 40 and the portion that contacts the joint material 73, respectively. Yes. When the side spar 40 is clamped by the bracket 72, the side spar 40 can be prevented from being deformed by inserting the spacer 74 into the side spar 40 and tightening the bolts B and nuts N.

  The joint material 73 is made of a plate material that extends obliquely upward from the support shoe 71 and is disposed so as to be substantially orthogonal to the longitudinal direction of the side beam 40.

  According to the above configuration, the upper end portion of the side beam 40 can be fixed to an arbitrary location of the reinforcing member 18. Furthermore, even if it is a place other than the reinforcement member 18, if it is a part which can fix the support shoe 71 with the volt | bolt B, the upper end part of the side beam 40 can be fixed to the wall surface etc. of a building, for example.

  As shown in FIG. 2A and FIG. 3, on the upper surfaces of a pair of adjacent side girders 40 (only one side is shown in FIGS. 2 and 3), there is a tread plate receiving material 43 for supporting the tread plate 20, respectively. Is provided. A plurality of tread plate receiving members 43 are provided along the longitudinal direction of the side girders 40 at a predetermined pitch according to the height of the staircase, and fastening members such as bolts B are provided on the upper surfaces of the side girders 40 and 40 having a rectangular cross section. It is fixed by. The tread board receiving material 43 has an upper end horizontal surface 43 a that is horizontal when fixed to the side beam 40. The tread board receiving material 43 has a trapezoidal shape in a side view, and is arranged with the trapezoid inclined obliquely so that one oblique side comes into contact with the upper surface of the side beam 40. The tread plate receiving member 43 has an abutment surface 43 b in which both ends of one oblique side extend in the extending direction and the oblique side abuts and is fixed to the upper surface of the side beam 40. The other hypotenuse constitutes the upper end horizontal plane 43a. On the upper horizontal surface 43a, there are formed two through holes 43c through which the bolts B for fixing the tread plate 20 are inserted.

  As shown in FIGS. 3 and 4, a pair of cover members 45 a and 45 b are attached around the tread plate receiving member 43. These cover members 45a and 45b are provided so as to sandwich the tread plate receiving material 43 from both sides in the width direction of the stairs. The cover members 45a and 45b include a cover body plate 46 that covers the side surface of the tread plate receiving member 43, an upper connection plate 47 that extends from the inner surface of the cover body plate 46 toward the other cover body plate 46, and a lower side. The connection plate 48 is provided. The cover body plate 46 has a trapezoidal shape that covers the tread receiving member 43 including the contact surface 43b in a side view.

  The upper connection plate 47 is formed along the trapezoidal short side 43 d of the tread plate receiving member 43, and the upper connection plate 47 a of one cover member 45 a extends orthogonally from the inner side surface of the cover body plate 46. It is formed in a flat shape. The upper connection plate 47b of the other cover member 45b extends orthogonally from the inner surface of the cover body plate 46, and is formed in a two-step flat shape having a step portion 47c. The one upper connection plate 47a comes into contact with the surface. On the surface of the upper connection plate 47a, a protrusion 47d is formed, and on the surface on the upper connection plate 47a side of the flat surface portion on the tip side of the upper connection plate 47b, a groove 47e that engages with the protrusion 47d is formed. It serves as a positioning guide for the upper connection plate 47a and the upper connection plate 47b.

  The lower connection plate 48 is formed along the trapezoidal long side 43 e of the tread plate receiving member 43, and the lower connection plate 48 b of the other cover member 45 b is orthogonal to the inner surface of the cover body plate 46. It extends and is formed in a planar shape. The lower connection plate 48a of one cover member 45a extends perpendicularly from the inner surface of the cover body plate 46, and is formed in a two-step flat shape having a step portion 48c. Is in contact with the surface of the other lower connection plate 48b. A protrusion 48d is formed on the surface of the lower connection plate 48b, and a groove 48e that meshes with the protrusion 48d is formed on the surface of the lower connection plate 48b side of the flat portion on the tip side of the lower connection plate 48a. It serves as a positioning guide for the lower connection plate 48a and the lower connection plate 48b. Screw holes 48f are formed in the lower connection plate 48a and the lower connection plate 48b, respectively, and the screws S are screwed together with the screw holes 43f formed in the tread plate receiving material 43. Cover members 45a and 45b are fixed.

  The cover members 45a and 45b are both made of an aluminum extruded profile, and as shown in FIG. 4, when they are rotated 180 degrees, their cross-sectional shapes are the same as each other and have the same shape. In short, the upper connection plate 47a of one cover member 45a and the lower connection plate 48b of the other cover member 45b have the same cross-sectional shape, and the lower connection plate 48a of one cover member 45a and the other cover The upper connection plate 47b of the member 45b has the same cross-sectional shape. As a result, the cover members 45a and 45b are formed by cutting the extruded sections having the same cross section obliquely as appropriate and screwing the screw holes 48f. By providing the cover members 45a and 45b in this manner, the tread plate receiving member 43 and the bolt B can be covered and hidden, so that a clean appearance can be obtained and the supporting strength of the tread plate 20 of the tread plate receiving member 43 is reinforced. can do.

  As shown in FIG. 5, the tread plate 20 is bridged and fixed between tread plate receiving members 43 and 43 provided in the pair of side girders 40 and 40, respectively. The tread plate 20 is placed on the upper horizontal surfaces 43 a and 43 a of the tread plate receiving members 43 and 43, and is fixed via bolts B and nuts N. The tread plate 20 is formed such that both ends in the width direction of the stairs are longer than the distance between the pair of tread plate receiving members 43, 43 (side girders 40, 40) and extend outward from the side girders 40. The step width is longer than the distance between the girders 40 and 40.

  As shown in FIGS. 2A and 3, the tread 20 is made of an aluminum extruded shape having a horizontally long rectangular cross section, and a pair of reinforcing ribs 21 and 21 are provided in the entire length in the extrusion direction. It is formed continuously over. The reinforcing ribs 21 and 21 are vertically erected so as to be perpendicular to the upper surface and the lower surface of the tread plate 20 with a predetermined interval in the depth direction in which the tread plate 20 is kicked (left and right in FIG. 2). In addition, the interior of the tread plate 20 is formed to be divided into three hollow portions 22a, 22b, and 22c.

  A pair of ridges 23a, 23a for forming a groove 23 for locking the nut N are formed at the bottoms of the hollow portions 22b, 22c located on both sides in the kicking depth direction of the tread plate 20 (both left and right sides in FIG. 2). A through hole 23 b is formed at the bottom of the groove 23, through which a bolt B for fixing the tread plate 20 to the tread plate receiving member 43 is inserted. The ridges 23a and 23a are continuously formed over the entire length of the tread plate 20 in the extrusion direction, and also serve as reinforcing ribs that increase the strength of the tread plate 20. The protrusions 23a, 23a are bent inward at the tip portions as viewed from the cross-sectional direction, and the nut N is restrained in the height direction. The groove 23 has a width that is slightly wider than the distance between opposite sides of the nut N (the diameter of the inscribed circle), and is configured to lock and receive the nut N so as not to rotate. It should be noted that the plate portions on both sides in the width direction of the groove 23 are formed to be slightly thicker and are reinforced so as to face the tightening of the bolt B.

  When the tread plate 20 is fixed to the tread plate receiving member 43, a nut N is inserted and locked at a predetermined position of the groove 23, and the bolt B is received from the lower side of the upper horizontal surface 43a of the tread plate receiving member 43. The material 43 is inserted into the through hole 43c and the tread plate 20 through the through hole 23b and screwed into the nut N. At this time, since the nut N is locked in the groove 23 and does not rotate, it can be tightened only by rotating the bolt B.

  As shown in FIG. 3, lid members 24 are fixed by screws S at both ends of the tread plate 20 in the extrusion direction. A groove 25 for screwing a screw S for fixing the lid member 24 into a side portion (a side portion opposite to the reinforcing rib 21) of the hollow portions 22b and 22c on the side in the depth direction of the tread plate 20. Is formed. The groove 25 is composed of a pair of ridges 25a and 25a formed in parallel to face each other, and has a C-shaped cross section. The ridges 25a and 25a are continuously formed over the entire length of the tread plate 20 in the extrusion direction, and also serve as reinforcing ribs that increase the strength of the tread plate 20. When attaching the lid member 24 to the tread board 20, the lid member 24 is disposed on the end surface of the tread board 20, and the screw S is inserted through the screw hole 24 a of the lid member 24 and screwed into the groove 25 of the tread board 20. At this time, the groove 25 is slightly expanded by the screw S, and the screw S is sandwiched and fixed.

(Stairs and handrail fixing structure)
On the other hand, in the hollow portion 22a located in the center of the tread plate 20 in the depth direction, through holes 22d through which the rod-like fixing members 55 pass are formed in the vicinity of both ends in the extrusion direction of the tread plate 20 (both ends in the width direction of the stairs). The fixing member 55 is a member for fixing the handrail column 51 of the handrail 50 to the tread plate 20, and is configured by a fastening member such as a screw. A plurality of through holes 22d are formed on each of the upper surface and the lower surface of the tread plate 20 at positions corresponding to each other in the vertical direction (four in this embodiment). The through hole 22d only needs to be formed in the tread plate 20 to which the handrail support column 51 is attached, and may not be formed in the tread plate 20 to which the handrail support column 51 is not attached.

  A reinforcing base member 30 for increasing the fixing strength of the handrail column 51 is inserted into the hollow portion 22a. The reinforcing base member 30 is made of an extruded aluminum member of the same type as the tread plate 20, and has a rectangular cross section. The reinforcing base member 30 may be formed of a material having a higher strength than the tread board 20. As shown in FIGS. 3 and 5, the reinforcing base member 30 has a total length slightly longer than the length from the end portion of the tread plate 20 protruding outward from the side beam 40 to the portion of the through hole 23 b. In addition, it is configured to extend from the end of the tread plate 20 to a fixed portion between the tread plate 20 and the side beam 40.

  As shown in FIGS. 2A, 3, and 5, the reinforcing base member 30 has two rows of hollow portions 30 a and 30 a formed continuously over the entire length in the extrusion direction. The hollow portions 30a and 30a are respectively formed side by side in the depth direction of the tread board 20 (left and right direction in FIG. 2), and through holes 30b through which the fixing member 55 passes are formed on the upper and lower surfaces. (See FIGS. 2A and 2B and FIG. 3). A plurality of through holes 30b are formed at positions corresponding to the through holes 22d of the tread plate 20 (four in this embodiment). Each fixing member 55 is inserted from the lower through hole 30b, passes through the hollow portion 30a, and the upper end portion protrudes from the upper through hole 30b. A wall surface 30c between the hollow portions 30a and 30a is formed thicker than other portions, and the strength of the reinforcing base member 30 is increased.

  As shown in FIG. 2 (b), on the bottom surface of the hollow portion 22 a of the tread plate 20, a ridge 26 protruding upward is continuously formed over the entire length of the tread plate 20 in the pushing direction. On the other hand, a concave groove 31 corresponding to the shape of the ridge 26 is formed on the lower surface of the reinforcing base member 30. Specifically, the concave groove 31 has an inner shape that is substantially the same as the outer shape of the ridge 26, and the ridge 26 is assembled so as to mesh with the concave groove 31. The concave groove 31 is formed continuously over the entire length of the reinforcing base member 30 in the extrusion direction. When the reinforcing base member 30 is inserted into the hollow portion 22 a of the tread plate 20, the concave groove 31 of the reinforcing base member 30 slides so as to be engaged with the ridges 26 of the tread plate 20. Thereby, the position of the reinforcing base member 30 in the depth direction of the kicking of the tread plate 20 is guided, and the through hole 22d of the tread plate 20 and the through hole 30b of the reinforcing base member 30 can be easily aligned.

  Further, a concave groove 27 along the convex line 26 is formed on the back side of the convex line 26 (the lower surface of the tread plate 20). On the other hand, on the upper surface of the upper end horizontal surface 43 a of the tread plate receiving material 43, a ridge 44 inserted into the groove 27 is formed. When the tread plate 20 is placed on the tread plate receiving member 43, the ridge 44 of the tread plate receiving member 43 is inserted into the concave groove 27 of the tread plate 20, and serves as a positioning guide in the depth direction of kicking of the tread plate 20. .

  In the present embodiment, the ridges 26 and the grooves 31 are formed on the lower surface side of the tread plate 20, but the ridges and grooves may be formed on the upper surface side. Further, a concave groove may be formed in the tread plate 20, and a ridge may be formed in the reinforcing base member 30. However, it is preferable to form a concave groove in the reinforcing base member 30 as in this embodiment because the outer surface of the tread plate 20 does not protrude.

  As shown in FIGS. 2A, 3, and 5, the fixing member 55 includes a through hole 22 d of the tread plate 20 and a through hole 30 b of the reinforcing base member 30 from below the tread plate 20 and the reinforcing base member 30. Via the tread plate 20 and inserted through the tread plate 20. The fixing member 55 is mounted such that its upper end protrudes upward from the upper surface of the tread plate 20 by a predetermined length. A male screw portion 55 a is formed at the tip of the fixing member 55.

  As shown in FIG. 3 and FIG. 5A, the handrail column 51 of the handrail 50 is made of an extruded aluminum member of the same type as the tread plate 20 and has a rectangular cross section. The handrail column 51 has a hollow portion 51 a therein and is formed thicker than the tread plate 20. A female screw portion 51 b is formed at the lower end portion of the handrail column 51. The female screw part 51b is carved into the lower end part of the through-hole 51c formed in the four corners of the cross section of the handrail support | pillar 51, respectively. A male screw portion 55a of an upper end protruding portion 56 of a fixing member 55 protruding upward from the upper surface of the tread plate 20 is screwed into the female screw portion 51b, so that the handrail column 51 is fixed to the tread plate 20. .

  Next, an assembling process of the staircase structure 1 having the staircase and handrail fixing structure having the above-described configuration will be described.

(Fixing treads and side girders)
As shown in FIG. 3, first, the tread plate receiving materials 43, 43... Are fixed by bolts B at predetermined positions on the upper surface of the side beam 40. Thereafter, the tread plate 20 is bridged between the tread plate receiving members 43 and 43 (see FIG. 5B) of the side girders 40 arranged in parallel with each other, and is fixed by bolts B and nuts N. At this time, the tread plate 20 is easily guided to a predetermined position by inserting the ridge 44 of the tread plate receiving member 43 into the concave groove 27 of the tread plate 20. On the other hand, the nut N is inserted and locked in advance in a predetermined position of the groove 23 of the hollow portions 22b and 22c of the tread plate 20. Then, the bolt B is inserted into the through hole 43 c of the tread board receiving material 43 and the through hole 23 b of the tread board 20 from below the upper end horizontal surface 43 a of the tread board receiving material 43 and screwed into the nut N. At this time, since the nut N is locked in the groove 23 and does not rotate, it can be fastened to the nut N simply by rotating the bolt B.

(Fixing the handrail and footboard)
Thereafter, the reinforcing base member 30 is inserted into the end portion of the tread plate 20 to which the handrail support column 51 is attached. At this time, the reinforcing base member 30 is inserted into the hollow portion 22a in a state in which the concave groove 31 on the lower surface thereof meshes with the ridge 26 formed on the bottom surface of the hollow portion 22a of the tread plate 20, so The position of the reinforcing base member 30 in the depth direction is guided. Then, the reinforcing base member 30 is inserted until the end portion thereof is flush with the end portion of the tread plate 20, so that the position of the through hole 22d of the tread plate 20 and the position of the through hole 30b of the reinforcing base member 30 are Is easily adapted.

  Thereafter, the handrail support column 51 is placed at a predetermined position on the upper surface of the predetermined tread plate 20, and from the lower side of the tread plate 20 and the reinforcing base member 30 to the through hole 22 d of the tread plate 20 and the through hole 30 b of the reinforcing base member 30. The bolt B (fixing member 55) is inserted, and the upper end portion of the bolt B is fixed so as to protrude upward from the upper surface of the tread plate 20, and is inserted therethrough. At this time, the male screw portion 55 a of the upper end protruding portion 56 of the fixing member 55 is screwed into the female screw portion 51 b at the lower end portion of the handrail column 51, and the handrail column 51 is fixed to the tread plate 20.

  On the other hand, the lid member 24 is disposed at both ends of the tread plate 20, the screw S is inserted through the screw hole 24 a of the lid member 24, and is screwed into the groove 25 of the tread plate 20. Secure to. At this time, since the screw S only needs to fix the lid member 24 to the tread plate 20, it can have sufficient fixing strength. Moreover, since the cover member 24 is planar, the end of the tread plate 20 has a clean and excellent appearance.

  Thereafter, the handrail portion 52 is bridged between the handrail struts 51, 51 adjacent in the vertical direction along the side girders 40, and the handrail 50 is formed by providing the lattice portion 53, so that the staircase structure 1 can be manufactured. Complete.

  According to the staircase structure 1 having the above configuration, the staircase structure 1 having an excellent appearance can be obtained. That is, from the lower side of the tread plate 20 and the reinforcing base member 30, the rod-shaped fixing member 55 is inserted so that its upper end protrudes upward from the upper surface of the tread plate 20, and the upper end protruding portion 56 of the fixing member 55 is attached. Since the handrail support 51 is fixed to the footboard 20 by being screwed into the female screw portion 51b at the lower end of the handrail support 51, the fixing member 55 has its head exposed below the footboard 20. Just not noticeable. Further, by fixing the handrail support column 51 to the upper surface of the tread plate 20, there is no need to provide an insertion portion of the handrail support column 51 at the end portion of the tread plate 20, and the lid member 24 at the end portion of the tread plate 20 is made flat. Therefore, a clean and excellent appearance can be obtained.

  Since the handrail support column 51 is directly fixed to the tread plate 20 via the fixing member 55, the fixing strength with the tread plate 20 can be increased. Further, since the stress applied to the handrail support column 51 can be supported by the reinforcing base member 30 inserted into the hollow portion 22a of the tread plate 20, the fixing strength of the handrail support column 51 and the step plate 20 can be further increased. Furthermore, since the reinforcing base member 30 can support not only the stress applied to the handrail support column 51 but also the load applied to the tread plate 20, the strength of the tread plate 20 itself can be increased.

  Further, since the reinforcing base member 30 is configured to extend from the end portion of the tread plate 20 to a fixed portion between the tread plate 20 and the side beam 40, the stress applied to the handrail column 51 is caused to pass through the reinforcing base member 30. It can be transmitted to the side beam 40. Therefore, the fixing portion between the stairs and the handrail can withstand more stress, and the fixing strength between the handrail support column 51 and the tread plate 20 can be further increased. Specifically, the stress applied to the handrail support column 51 is applied to the tread plate 20 as a moment force centered on the portion fixed to the tread plate receiving member 43, but is countered by the reinforcing base member 30 disposed in the portion to which the moment force is applied. be able to. Further, since the reinforcing base member 30 is provided only at both ends of the tread plate 20 and is not provided at the central portion in the width direction of the staircase, an increase in the weight can be prevented. Furthermore, since the reinforcing base member 30 is disposed only in a portion necessary to face the moment force, efficient reinforcement is performed.

  In the present embodiment, the reinforcing base member 30 and the tread board receiving member 43 are not directly fixed, but the stress transmitted to the reinforcing base member 30 in the fixed portion is transmitted to the plate material of the tread board 20 and the tread board through the bolts B. It is transmitted to the receiving material 43. Of course, the reinforcing base member 30 and the tread board receiving member 43 may be directly fixed using a fixing member such as a bolt.

  In addition, since the fixing strength of the handrail column 51 and the tread plate 20 is increased as described above, the number of installed handrail columns 51 can be reduced. Accordingly, it is possible to reduce the labor and time for mounting the handrail support column 51, and it is possible to provide the handrail 50 having a clean appearance.

  On the other hand, the ridge 26 is formed on the inner surface of the hollow portion 22a of the tread plate 20, and the concave groove 31 is formed on the outer surface of the reinforcing base member. Positioning when inserting the member 30 into the hollow portion 22a of the tread plate 20 can be easily performed. Further, the ridges 26 serve as reinforcing ribs, and the strength of the tread plate 20 can be increased, and the strength of the reinforcing base member 30 can be increased by the recessed grooves 31.

  Furthermore, since the tread 20 has at least two reinforcing ribs 21 and 21 inside thereof, and the reinforcing base member 30 is inserted into the hollow portion 22a between the reinforcing ribs 21 and 21, the reinforcing base member 30 is Positioning when inserting between the reinforcing ribs 21 and 21 can be easily performed. Further, the strength of the tread plate 20 can be increased by the reinforcing ribs 21 and 21.

  Since the tread board 20 and the reinforcing base member 30 are made of an extruded shape member made of aluminum, the tread board 20 and the reinforcing base member 30 having a complicated shape can be easily formed by simply cutting the extruded shape member with an appropriate length. Can be manufactured. Moreover, since the extruded shape made of aluminum has high dimensional accuracy and is light in weight, it can be easily handled on site.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to above-described embodiment, It can implement by changing suitably. For example, in the present embodiment, the staircase structure 1 installed on an outdoor balcony has been described as an example. However, the step structure 1 may be installed directly on a building other than the balcony, and either outdoors or indoors. Of course, it may be installed.

  In the present embodiment, each member such as the tread board 20 and the reinforcing base member 30 is formed of an extruded aluminum member. However, the present invention is not limited to this, and other members such as stainless steel are used. May be.

It is the figure which showed the best form for implementing the staircase structure which concerns on this invention, Comprising: (a) is a side view, (b) is the top view which showed the connection with a staircase structure and a balcony. (A) is an expanded sectional view which showed the best form for implementing the staircase structure based on this invention, (b) is a partial expanded sectional view. It is the disassembled perspective view which showed the best form for implementing the staircase structure based on this invention. It is sectional drawing which showed the cover member. It is the figure which showed the best form for implementing the staircase structure which concerns on this invention, Comprising: (a) is the sectional view on the AA line of (b) which showed the handrail support | pillar, (b) is a footboard and reinforcement It is sectional drawing which showed the positional relationship of a base member and a tread board receiving material. It is the perspective view which showed the balcony provided with the staircase structure based on this invention. It is the perspective view which showed the connection with the conventional tread and a handrail.

Explanation of symbols

1 Staircase structure 20 Tread 21 Reinforcement rib (rib)
22a hollow portion 26 ridge 30 reinforcing base member 30a hollow portion 31 concave groove 40 side girder 50 handrail 51 handrail post 55 fixing member 56 upper end protruding portion

Claims (8)

In the fixing structure of the stairs and the handrail that fixes the handrail post to the treads constituting the stairs,
A reinforcing base member is inserted into the hollow portion of the tread made of a hollow shape,
A rod-shaped fixing member is passed through the lower side of the tread plate and the reinforcing base member so that the upper end portion protrudes upward from the upper surface of the tread plate, and the upper end protruding portion of the fixing member is attached to the handrail post. A structure for fixing a handrail to a staircase, wherein the handrail support is fixed to the tread by being screwed to a lower end of the door. The tread is spanned and fixed between a pair of side girders, and both ends thereof protrude outward from the pair of side girders,
The staircase and handrail fixing structure according to claim 1, wherein the reinforcing base member extends from an end portion of the tread plate to a fixing portion to the side beam. On the inner surface of the hollow portion of the tread plate, a concave groove or a ridge for positioning the reinforcing base member is formed,
The stairway and handrail fixing structure according to claim 1 or 2, wherein a ridge corresponding to the groove or a groove corresponding to the ridge is formed on the outer surface of the reinforcing base member. . The tread has at least two ribs therein,
The staircase and handrail fixing structure according to any one of claims 1 to 3, wherein the reinforcing base member is inserted into a hollow portion between the ribs. The staircase and handrail fixing structure according to any one of claims 1 to 4, wherein the step board is made of an extruded shape member made of aluminum. The staircase and handrail fixing structure according to any one of claims 1 to 5, wherein the reinforcing base member is formed of an extruded aluminum member having a hollow portion. A pair of side girders arranged at a predetermined interval in the width direction of the staircase is fixed by bridging a tread made of a hollow material,
Insert a reinforcing base member into the hollow portion of the tread,
From the lower side of the tread plate and the reinforcing base member, a rod-shaped fixing member is inserted so that the upper end portion protrudes upward from the upper surface of the tread plate, and the upper end protruding portion of the fixing member is attached to the handrail post. A staircase structure characterized by being configured to be screwed into a lower end portion and to attach the handrail support column to the tread. The both ends of the tread board protrude outward from the pair of side girders,
The staircase structure according to claim 7, wherein the reinforcing base member is configured to extend from an end portion of the tread plate to a fixed portion to the side beam.

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