JP2018076684A - Prefabricated staircase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a prefabricated stair case capable of making a construction period shorter as well as preventing construction cost-up.SOLUTION: A prefabricated stair case 30, where each of a plurality of step members 8 including a tread board 4 arranged horizontally and a riser board 6 arranged perpendicular to a tread surface 4a of the tread board 4 is arranged in a shape of a stair along an inclined line, and the step members 8 of each of steps being fixed on a rod-like member 18 arranged toward in the inclined direction on an inclined surface 7, comprises: a plurality of support rods 20 erected at a longitudinal end side of the step member 8 by connecting a plurality of handrail support members 31 attached each of a plurality of rod-like members 18 to each of longitudinal lower ends of the support rods at each of the plurality of the handrail support members 31; and the plurality of rod-like handrail members 21 of which each of both longitudinal ends of the rod-like handrail members is attached at each longitudinal upper end of the plurality of the support rods 20, wherein each of the handrail support members 31 is removably connected with each of the plurality of the longitudinal lower ends of the support rods 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a prefabricated staircase.

  Some conventional prefabricated stairs are not provided with handrails (see Patent Document 1). However, if there is no handrail, the person climbing up the stairs may become unstable and dangerous.

  FIGS. 12 to 14 are views referred to for explaining a conventional prefabricated staircase 1 with a handrail. This prefabricated staircase 1 has been used, for example, as a staircase that can be easily attached to a mountain road or a slope such as a construction site.

  In the prefabricated staircase 1, as shown in FIG. 12, a plurality of step members 8 made of synthetic resin, in which the tread plate 4 and the kick-up plate 6 are integrally formed, are arranged in a step shape.

  Further, a mounting plate portion 10 having a height upward is integrally formed at an end portion on the left side in FIG. 12 in the width direction of the tread plate 4 (left and right direction in FIG. 12). Then, the lower end portion of the kicking plate 6 of another step member 8 arranged adjacent to the upper left diagonally upper side of the step member 8 in FIG. 12 abuts against the tread surface 4 a (upper surface) of the step plate 4 of the step member 8. In addition, the mounting plate portion 10 of the tread plate 4 is disposed in contact with the rising surface on the right side in FIG.

  And the nail member 12 was driven so that it might penetrate the kick board 6 and the attachment board part 10, and the step members 8 adjacent to each other in the upper left diagonal direction in FIG. 12 were connected to each other.

  Further, in the prefabricated staircase 1, as shown in FIGS. 12 to 14, the step is performed on the two rod-shaped members 18 made of synthetic resin arranged in parallel to each other in the inclined direction on the inclined surface 7 of the ground. The member 8 was fixed in a stepped manner along the length direction of the rod-shaped member 18.

  As shown in FIG. 12, before another step member 8 is arranged on the upper side of the step plate 4 of each step member 8, the nail member 14 is bar-shaped from the step surface 4a in the vicinity of the mounting plate portion 10 of the step plate 4. It was driven toward the member 18 in a direction substantially perpendicular to the length direction of the rod-shaped member 18.

  Thus, the step member 8 was fixed to the rod-shaped member 18 by the tip side of the nail member 14 being stuck into the rod-shaped member 18 on the lower side of the tread plate 4. The head of the nail member 14 is covered with the lower end surface of the kick-up plate 6 of another step member 8 disposed on the upper side of the tread plate 4 so that it cannot be seen from the outside.

  As shown in FIG. 12, the anchor bolt 19 is inserted into a through-hole formed so as to penetrate the rod-shaped member 18 in the thickness direction, and the thickness of the rod-shaped member 18 is inserted into the male screw portion on the ground side of the anchor bolt 19. The anchor bolt 19 was fixed to the rod-shaped member 18 by fastening the female threaded portion of each of the pair of nuts 15 from both sides of the direction.

  And the rod-shaped member 18 was being fixed on the inclined surface 7 when the edge part of the underground side of the anchor bolt 19 stabbed into the ground of the inclined surface 7.

  In this way, by fixing each step member 8 on the rod-shaped member 18 disposed on the inclined surface 7, the step member 8 is not directly affected by the unevenness of the inclined surface 7, but above the inclined surface 7. It was supposed to be installed.

  In addition, as shown in FIG. 12, the lowermost step member 8 in the lower right diagonal direction in the drawing receives the earth pressure in the direction along the inclined surface 7, the force of the water flow at the time of rain, and the like. It was provided in contact with the pile 16 having a larger diameter than the anchor bolt 19 driven into the ground so as not to move to the downstream side in the middle right lower diagonal direction. The step member 8 was firmly supported by the resistance force of the pile 16.

  Further, as shown in FIG. 13, a view of the inclined surface 7 as shown in FIG. 12 at a position slightly away from both ends in the length direction (left and right direction in FIG. 13) of the step member 8 in the length direction. Cylindrical steel pipes 24 were arranged at intervals in the middle left upper slope direction. Most of the steel pipe 24 was buried in the ground except for the opened upper end portion, and the mortar 23 was filled between the inner peripheral surface and the outer peripheral surface of the column 20.

  For this reason, the lower end portion of the cylindrical support column 20 is inserted into the steel pipe 24 and fixed by the mortar 23 solidified in the steel pipe 24. As described above, the lower end portion of the support column 20 is fixed by the mortar 23 in the steel pipe 24, so that the support column 20 is erected so as to extend upward in the vertical direction from the inclined surface 7 of the ground.

  As shown in FIG. 12, a handrail mounting bracket 22 having a U-shaped horizontal cross section (see FIG. 13) is fixed to the upper end portion of the support column 20.

  As shown in FIG. 13, a through-hole penetrating in the plate thickness direction (vertical direction in FIG. 13) is formed in the bottom plate portion on the opposite side of the U-shaped opening of the handrail mounting bracket 22, and the column 20 A through-hole penetrating in the radial direction (up and down direction in FIG. 13) was formed in the upper end portion.

  Then, the nut is screwed to the tip of the bolt that passes through the through hole in the bottom plate portion of the handrail mounting bracket 22 and the through hole in the upper end portion of the column 20, so that the handrail mounting bracket 22 is attached to the upper end portion of the column 20. It was fixed.

  And as shown in FIG. 13, the male screw part of the volt | bolt 25 was each formed in the both ends of the U-shaped opening part side of the handrail mounting bracket 22, and the through-hole penetrated in the left-right direction in FIG. A through hole formed in the end portion in the length direction of the beam 21 (handrail member) and penetrating in the left-right direction in FIG. 13 is inserted, and the female screw portion of the nut 26 is screwed to the distal end portion of the male screw portion. .

  In this way, the cylindrical (bar-shaped) handrail beam 21 is connected to the upper end portion of the support column 20 via the handrail mounting bracket 22 at both ends in the length direction, so that the length direction of the step member 8 is increased. It was provided at a position slightly away from both ends in the longitudinal direction (see FIG. 13).

Utility Model Registration No. 3119522

  However, in the conventional prefabricated staircase 1, the handrail beam 21 is connected to the column 20 having the lower end embedded in the steel pipe 24 away from the rod-shaped member 18, and thus the step member fixed to the rod-shaped member 18. 8 was fixed independently.

  For this reason, when the vertical distance from the rod-shaped member 18 to the inclined surface 7 is long due to the unevenness of the inclined surface 7, in order to make the height dimension from the rod-shaped member 18 to the handrail beam 21 constant. It was necessary to lengthen the length of the column 20 on the ground according to the increased distance.

  On the other hand, when the vertical distance from the rod-shaped member 18 to the inclined surface 7 is shortened due to the unevenness of the inclined surface 7, in order to make the height dimension from the rod-shaped member 18 to the handrail beam 21 constant, It was necessary to shorten the ground length of the column 20 according to the shortened distance.

  For example, as shown in FIG. 12, the column 20 disposed on the right side in FIG. 12, which is disposed at a position where the vertical distance from the rod-shaped member 18 to the inclined surface 7 becomes long, extends from the rod-shaped member 18 to the inclined surface 7. It was necessary to form the length of the ground to be longer than the column 20 arranged on the left side in FIG. 12 arranged at a position where the distance in the vertical direction becomes shorter.

  Therefore, when the prefabricated staircase 1 is installed on the site, it is necessary to manufacture the column 20 having a length according to the unevenness of the inclined surface 7, which increases the construction cost and the construction period. There was a problem of becoming longer.

  Therefore, in view of the above problems, an object of the present invention is to provide a prefabricated staircase capable of preventing the construction cost from being increased and shortening the construction period.

In order to solve the above problems, a prefabricated staircase according to the present invention is:
A plurality of step members each having a step board arranged horizontally and a kick board arranged perpendicular to the tread surface of the tread board are arranged side by side along an inclination direction, and the step members of each step Is a prefabricated staircase fixed in a staircase pattern on a bar-like member arranged in an inclined direction on an inclined surface,
A plurality of handrail support members attached to the rod-shaped member;
By connecting the lower end portion in the length direction to the handrail support member, a plurality of pillars erected at a position on the end side in the length direction of the step member;
A plurality of rod-shaped handrail members each having a longitudinal end connected to the longitudinal upper ends of the plurality of columns;
The handrail support member is detachably connected to a lower end portion in the length direction of the support column.

The prefabricated staircase according to the present invention is
The handrail support member has two band members that are combined so as to face each other and are arranged so as to surround the outer peripheral surface of the support column from both sides,
The handrail support member is connected to the lower end portion in the length direction of the support column by connecting the two band members to each other by screw fastening.

The prefabricated staircase according to the present invention is
The handrail support member has a coupling member,
The coupling member is formed by fastening a female screw portion of a nut to a male screw portion of a bolt that passes through a through hole formed in the rod-shaped member and a mounting hole formed so as to penetrate the coupling member. Fixed to the surface of the rod-shaped member facing the column,
In the mounting hole, the bolt and the nut are screwed according to the inclination angle of the rod-shaped member in order to maintain the angle of the coupling member in which the length direction of the support column is perpendicular to the tread plate. It is formed so that the position can be changed.

The prefabricated staircase according to the present invention is
The mounting holes are respectively arranged at positions near both ends in the length direction of the coupling member, and the opening shape protrudes in a convex shape toward both ends in the length direction of the coupling member, so that the length direction center portion side Each of them is formed in an arc shape that is recessed in a concave shape.

The prefabricated staircase according to the present invention is
It has a plate-like handrail reinforcement member fixed to the surface opposite to the tread surface of the tread plate, and the end portion of the handrail reinforcement member in the length direction on the support column side is longer than the length direction end portion of the step member. It protrudes outward and is connected to the support column.

According to such a prefabricated staircase of the present invention,
A plurality of step members each having a step board arranged horizontally and a kick board arranged perpendicular to the tread surface of the tread board are arranged side by side along an inclination direction, and the step members of each step Is a prefabricated staircase fixed in a staircase pattern on a bar-like member arranged in an inclined direction on an inclined surface,
A plurality of handrail support members attached to the rod-shaped member;
By connecting the lower end portion in the length direction to the handrail support member, a plurality of pillars erected at a position on the end side in the length direction of the step member;
A plurality of rod-shaped handrail members each having a longitudinal end connected to the longitudinal upper ends of the plurality of columns;
The handrail support member is detachably connected to the lower end portion in the length direction of the column,
It is possible to provide a prefabricated staircase that can prevent the construction cost from being increased and shorten the construction period.

It is the side view which shows the prefabricated staircase 30 which concerns on embodiment of this invention. It is a top view of the prefabricated staircase 30 of FIG. It is a front view of the prefabricated staircase 30 of FIG. It is a partial expanded side view of the prefabricated staircase 30 of FIG. FIG. 4 is a partially enlarged front view of the prefabricated staircase 30 in FIG. 3. 6A is a plan view of the band metal fitting 35 constituting the handrail support hardware 31, and FIG. 6B is a front view of the band metal fitting 35 of FIG. 6A. FIG. 7A is a plan view of the coupling hardware 32, the connection hardware 33, and the band metal fitting 34 constituting the handrail support hardware 31, and FIG. 7B is a right side view of the handrail support hardware 31 of FIG. 7A. FIG.7 (c) is a front view of the handrail support metal fitting 31 of Fig.7 (a). FIG. 8A is a front view of the coupling hardware 32, and FIG. 8B is a front view of the band metal fitting 34. 9A is a plan view showing the handrail reinforcement hardware 40, the band metal fittings 43 and 44, the bolt 45, and the nut 46, and FIG. 9B is the handrail reinforcement hardware 40 and the band metal fitting shown in FIG. 9A. 43 is a front view of 43, 44, bolts 45, and nuts 46. FIG. 10A is a partially enlarged side view showing the attachment state of the metal fitting 32 when the inclination angle of the rod-shaped member 18 is reduced in the prefabricated staircase 30 of FIG. 1, and FIG. In the prefabricated staircase 30, a partially enlarged side view showing the attachment state of the coupling hardware 32 when the inclination angle of the rod-shaped member 18 is increased. 11A is a partially enlarged side view of the prefabricated staircase 30 of FIG. 1 when the height dimension from the rod-shaped member 18 to the handrail beam 21 is increased, and FIG. 11B is the prefabricated stage of FIG. FIG. 4 is a partially enlarged side view when the height dimension from the rod-shaped member 18 to the handrail beam 21 is lowered in the expression staircase 30. It is the side view which shows the conventional prefabricated staircase 1. FIG. It is the top view which shows the prefabricated staircase 1 in FIG. It is the front view which shows the prefabricated staircase 1 in FIG.

  Hereinafter, the form for implementing the prefabricated staircase concerning the present invention is explained concretely based on a drawing.

  FIGS. 1 to 11 are views referred to for describing a prefabricated staircase 30 according to an embodiment of the present invention. In the prefabricated staircase 30 shown in these drawings, the same parts as those of the conventional prefabricated staircase 1 are denoted by the same reference numerals, and the description of the same configuration as the conventional one is omitted except for a part. It shall be.

  In the prefabricated staircase 30 according to the present embodiment, as shown in FIGS. 1 to 5, the metal plate-like coupling hardware 32 (coupling member) has a length direction in the length direction of the rod-shaped member 18. The rod-shaped member 18 is provided so as to come into contact with the surface on the side facing the support column 20. A plurality of metal fittings 32 are arranged at predetermined intervals in the length direction of the rod-shaped member 18 (see FIG. 1).

  Also, as shown in FIGS. 4 and 8 (a), the metal fitting 32 has a plate thickness at a position near the both ends in the length direction and substantially in line symmetry with respect to the center portion in the length direction. Attachment holes 32a penetrating in the direction are formed. Moreover, the opening shape of the attachment hole 32a is each formed in the circular arc shape which protrudes convexly at the length direction both ends of the coupling | bond metal fitting 32, and is dented in the length direction center part side.

  Then, as shown in FIG. 5, the male thread portion of the bolt 36 (see FIG. 4) is attached to the attachment hole 32 a of the coupling hardware 32 from the support 20 side (left side in FIG. 5) and the through hole 18 a formed in the rod-shaped member 18. Is inserted, and the female screw portion of the nut 37 is screwed to the tip of the male screw portion.

  Thus, the coupling hardware 32 is fixed to the surface (left side in FIG. 5) of the rod-shaped member 18 facing the support column 20 by fastening the bolt 36 and the nut 37.

  Further, as shown in FIGS. 4 and 5, a plate-like connection metal 33 is fixed to the surface of the coupling hardware 32 facing the support column 20 (left side in FIG. 5) by welding or the like. The connection hardware 33 is arranged so that the length direction thereof is the same direction (vertical direction) as the length direction of the support column 20.

  As shown in FIG. 5, two substantially semi-cylindrical (see FIGS. 6 and 7) band fittings 34 and 35 (band members) are provided at the height position where the connection hardware 33 is provided on the support column 20. These are combined so as to face each other, and are arranged so as to surround the outer peripheral surface of the support column 20 from both sides.

  As shown in FIG. 6, the band metal fitting 35 is formed with a plate portion that protrudes from each circumferential end portion so as to bend outward in the diameter direction (left and right sides in FIG. 6A). Four through holes 35a are formed in the portion (see FIG. 6B).

  Moreover, as shown in FIG. 7, the band metal part 34 is formed with a plate portion protruding so as to be bent from the both ends in the circumferential direction to the outside in the diametrical direction (left and right sides in FIG. 7A), Four through holes 34a are formed in the plate portion (see FIGS. 7C and 8B).

  Then, the two band metal fittings 34 and 35 are combined so as to face each other so that the through holes 34a and 35a are located on the coaxial line, and the bolt 38 is inserted into the through holes 34a and 35a, and the male screw portion of the bolt 38 is inserted. The female screw portion of the nut 39 is screwed (see FIG. 5).

  Thus, the two band metal fittings 34 and 35 are fixed so as to surround the outer peripheral surface of the support column 20 from both sides in a state of being combined so as to face each other.

  Further, as shown in FIGS. 5 and 7, the connection hardware 33 has a semi-cylindrical portion of the band metal fitting 34 at the end of the column 20 side (left side in FIG. 5) in the width direction (left-right direction in FIG. 5). Is fixed to the center of the outer circumferential surface in the circumferential direction by welding or the like.

  Thus, the prefabricated staircase 30 according to the present embodiment is different from the conventional prefabricated staircase 1 in that the lower end portion of the support column 20 is composed of the joint hardware 32, the connection hardware 33, and the band metal fittings 34 and 35. It is attached to the rod-shaped member 18 via a handrail support metal 31 (handrail support member).

  Therefore, even if the uneven state of the inclined surface 7 of the ground changes, it is not necessary to change the length dimension of the support column 20. In other words, the length of the support column 20 can be used with a constant length.

  Therefore, when installing the prefabricated staircase 30 on site, it is not necessary to manufacture the column 20 having a length according to the uneven state of the inclined surface 7 of the ground, thereby preventing an increase in construction cost, The construction period can be shortened.

  Moreover, since the attachment hole 32a of the coupling hardware 32 is formed so that the opening shape thereof is an arc shape (see FIG. 8A), the horizontal direction of the rod-shaped member 18 depends on the unevenness of the inclined surface 7. Even when the inclination angle is changed, it is possible to fix the coupling hardware 32 to the rod-shaped member 18 by changing the screw fastening position of the bolt 36 and the nut 37 without changing the angle of the coupling hardware 32 with respect to the horizontal direction. It has become.

  In this way, even if the angle of the rod-shaped member 18 with respect to the horizontal direction is changed, the angle with respect to the horizontal direction of the coupling hardware 32 can be maintained, so that the length direction of the column 20 changes the inclination angle of the rod-shaped member 18. Therefore, the support column 20 can be erected so as to be perpendicular to the horizontally disposed tread plate 4.

  For example, even when the inclination angle of the rod-shaped member 18 with respect to the horizontal direction is small as shown in FIG. 10A or when the inclination angle of the rod-shaped member 18 with respect to the horizontal direction is large as shown in FIG. By changing the position at which the bolt 36 and the nut 37 are screwed so as to pass through the through hole 18a (see FIG. 5) formed in the member 18, the length direction of the column 20 is perpendicular to the tread plate 4. And the coupling | bond metal fitting 32 can be fixed to the rod-shaped member 18 so that it may become a perpendicular direction.

  By the way, the range of the inclination angle of the rod-like member 18 that can attach the metal fitting 32 to the rod-like member 18 without changing the angle with respect to the horizontal direction is determined by the opening shape of the attachment hole 32a and the position to be formed. The

  Therefore, it is necessary to determine the opening shape of the attachment hole 32a and the position to be formed according to the assumed range of the inclination angle of the rod-shaped member 18.

  Further, since the band metal members 34 and 35 are fixed to the support column 20 by screwing bolts 38 and nuts 39, the band metal members 34 and 35 are fixed to the support column 20 by changing the fixing positions of the band metal members 34 and 35. The height dimension to the handrail beam 21 (handrail member) can be adjusted.

  For example, when it is desired to increase the height dimension from the bar-shaped member 18 to the handrail beam 21, as shown in FIG. 11A, the lower position in the figure at the lower end of the column 20 (in FIG. 1, the column 20 The bolts 38 and nuts 39 (see FIG. 5) are screwed so that the band brackets 34 and 35 can be fixed to the lower ends of the band brackets 34 and 35 at positions below the position where the band brackets 34 and 35 are fixed. .

  Further, when it is desired to reduce the height dimension from the rod-shaped member 18 to the handrail beam 21, as shown in FIG. 11 (b), the upper position in the figure at the lower end of the column 20 (in FIG. The bolts 38 and nuts 39 (see FIG. 5) are screwed together so that the band fittings 34, 35 can be fixed to a position above the position where the band fittings 34, 35 at the lower end are fixed.

  As described above, since the band metal members 34 and 35 are detachably fixed to the support column 20, the handrail beam can be removed from the bar-shaped member 18 only by changing the fixing position of the band metal members 34 and 35 to the support column 20 in the vertical direction. The height dimension up to 21 can be adjusted freely.

  Therefore, it is not necessary to manufacture the support column 20 each time according to the height dimension from the rod-shaped member 18 to the handrail beam 21 to be set, so that the construction cost can be prevented and the construction period can be shortened. .

  Further, as shown in FIGS. 1 to 5, after the support column 20 is attached to the rod-shaped member 18 through the handrail support metal 31, the support column 20 is attached with the handrail reinforcement hardware 40 (handrail reinforcement member) and the band metal members 43 and 44. Via the step member 8.

  The plate-shaped handrail reinforcement metal 40 made of metal is arranged so that the upper surface thereof is in contact with the back surface opposite to the tread surface 4 a of the tread plate 4. The handrail reinforcement hardware 40 is fixed to the tread plate 4 of the step member 8 by screw fastening of two sets of bolts 41 and nuts 42 (see FIG. 5).

  As shown in FIG. 2, the handrail reinforcement hardware 40 has a length dimension that is not more than half of the length dimension (left and right direction in FIG. 2) of the tread board 4, and each position near the both ends in the length direction of the tread board 4. In addition, the length direction of the step board 4 is substantially parallel to the length direction.

  Further, as shown in FIG. 5, the tread plate 4 of the step member 8 is formed with a through-hole through which the bolt 41 is inserted from the tread surface 4a side to the opposite side of the tread surface 4a, and handrail reinforcement A through hole 40a (see FIG. 9) through which the bolt 41 is inserted is also formed in the horizontal plate portion of the hardware 40.

  Further, at the upper end portion of the through hole through which the bolt 41 of the tread plate 4 is inserted, the diameter from the upper end opened to the tread surface 4a to a predetermined depth is larger than the diameter of the original through hole below the predetermined depth. A recess is formed (see FIG. 5).

  For this reason, when the male thread portion of the bolt 41 is inserted into the through hole of the tread plate 4, the head of the bolt 41 is embedded in the recess, and the person riding on the tread surface 4 a of the tread plate 4 The shoe is not caught on the head of the bolt 41.

  Then, after the lower end portion of the male screw portion of the bolt 41 is inserted through the through hole 40a (see FIG. 9) of the horizontal plate portion of the handrail reinforcement hardware 40, the handrail reinforcement hardware 40 is screwed to the female screw portion of the nut 42. Is fixed to the back surface of the tread surface 4 a of the tread plate 4.

  As shown in FIGS. 4 and 5, two substantially semi-cylindrical band metal fittings 43 and 44 are combined so as to face each other at the height position of the support rail 20 on the support column 20. These are arranged so as to surround the outer peripheral surface of the support column 20 from both sides (see FIG. 9).

  In addition, the band metal parts 43 and 44 are formed with plate portions protruding so as to be bent radially outward (both left and right sides in FIG. 4) from both ends in the circumferential direction. Are formed (see FIG. 9).

  Then, the two band fittings 43 and 44 are combined so that the through holes are located on the coaxial line so that they face each other, the bolts 45 are inserted into the through holes, and the female screw of the nut 46 is inserted into the male screw portion of the bolt 45. The part is screwed (see FIGS. 5 and 9).

  Thus, the two band metal fittings 43 and 44 are fixed so as to surround the outer peripheral surface of the support column 20 from both sides in a state of being combined so as to face each other.

  Further, as shown in FIG. 5, the handrail reinforcement hardware 40 has a longitudinal direction center of the outer peripheral surface of the semi-cylindrical portion of the band metal fitting 43 at the end of the longitudinal direction of the support column 20 (left side in FIG. 5). And are fixed to the center portion in the height direction by welding or the like (see FIG. 9).

  Thus, since the column 20 of the prefabricated staircase 30 is fixed to the step member 8 via the handrail reinforcement hardware 40 and the band fittings 43 and 44, for example, when a person holds the handrail beam 21, the handrail beam 21 Even when a force in the lateral direction (left and right direction in FIG. 2) is applied to 21, the column 20 does not fall down in the lateral direction (left and right direction in FIG. 2), and the handrail beam 21 is compared to the case of only the handrail support hardware 31. The strength of the can be improved.

  By the way, the support column 20 is attached to the bar-shaped member 18 via the handrail support metal 31 and fixed to the step member 8 via the handrail reinforcement metal 40 and the band fittings 43 and 44, and then the handrail beam 21 from the bar-shaped member 18. When the height dimension up to is adjusted, in order to change the height position of the lower end portion of the support column 20 (see FIG. 11), it is necessary to once loosen the bolts 38 and 45 and the nuts 39 and 46 (FIG. 5). reference).

  Therefore, as explained above, according to the prefabricated staircase 30 according to the present embodiment, it is possible to prevent the construction cost from being increased and shorten the construction period.

  Note that the present invention is not limited to the present embodiment, and various modifications are possible as long as the object of the present invention can be achieved.

  For example, in the prefabricated staircase 30 according to the present embodiment, the case where the step member 8 and the rod-shaped member 18 constituting them are made of synthetic resin (plastic) has been described. In this case, recycled plastic is used. However, it is needless to say that materials other than plastic may be used.

  Further, in the prefabricated staircase 30 according to the present embodiment, the outer shape of the plate surface of the coupling hardware 32 and the handrail reinforcement hardware 40 is formed in a rectangular shape, but it is not necessary to be limited to such a shape. For example, the outer shape may be formed in any other shape such as an ellipse.

  Further, in the prefabricated staircase 30 according to the present embodiment, as shown in FIG. 5, two sets of bolts 41 and nuts 42 screwed to each other are provided in the length direction of the handrail reinforcement hardware 40. Although the configuration is shown, it is not necessary to limit to two sets, and more than two sets may be provided.

  Further, in the prefabricated staircase 30 according to the present embodiment, the attachment hole 32a of the metal fitting 32 is formed so that the opening shape is an arc shape, but it is not limited to such a shape. For example, the opening shape may be formed in a shape such as a mountain shape or a polygonal shape, or may be formed in a plurality of circular shapes arranged in an arc shape.

  Further, in the prefabricated staircase 30 according to the present embodiment, the joint hardware 32 is provided with two mounting holes 32a, but it is not necessary to limit the number to two, and more than two are provided. Also good.

  Further, in the prefabricated staircase 30 according to the present embodiment, the support column 20 and the handrail beam 21 are formed in a cylindrical shape, but it is not necessary to be limited to such a shape, for example, a rectangular tube shape. It may be.

  Further, in the prefabricated staircase 30 according to the present embodiment, the coupling hardware 32, the connection hardware 33, the band metal fittings 34, 35, 43, 44, and the handrail reinforcement hardware 40 are made of metal, but have a certain strength or more. A material other than metal may be used as long as it has a material.

  Further, in the prefabricated staircase 30 according to the present embodiment, the support column 20 and the handrail beam 21 are configured to be provided in the vicinity of both end portions in the length direction of the step member 8, respectively. The step member 8 may be configured to be provided only in the vicinity of one end portion in the length direction.

  Further, in the prefabricated staircase 30 according to the present embodiment, one step member 8 is provided at each step of the staircase. A plurality of connected step members 8 may be provided in each stage.

  Moreover, in the prefabricated staircase 30 according to the present embodiment, the handrail reinforcement hardware 40 is formed so as to have a length dimension equal to or less than half of the length dimension of the footboard 4 as shown in FIG. It is not necessary to be limited to such a length dimension, and it may be formed so as to have a length dimension of half or more of the length dimension of the tread plate 4 or the entire length.

  Moreover, in the prefabricated staircase 30 according to the present embodiment, the height dimension from the rod-shaped member 18 to the handrail beam 21 can be freely adjusted by changing the fixing position of the band metal members 34 and 35 with respect to the support column 20. However, the present invention is not limited to such a configuration, and the height dimension from the bar-shaped member 18 to the handrail beam 21 can be freely adjusted by other methods. May be.

  Moreover, in the prefabricated staircase 30 according to the present embodiment, the handrail reinforcement hardware 40, the band metal fittings 43 and 44, the bolt 45, and the nut 46 are provided, but it is not necessary to be limited to such a configuration. The handrail reinforcement hardware 40, the band metal fittings 43 and 44, the bolt 45, and the nut 46 may not be provided.

DESCRIPTION OF SYMBOLS 1 Prefabricated type staircase 4 Tread plate 4a Tread surface 6 Kick-up plate 7 Inclined surface 8 Step member 10 Mounting plate part 12, 14 Nail member 15 Nut 16 Pile 18 Rod-shaped member 18a Through-hole 19 Anchor bolt 20 Strut 21 Handrail beam 22 Handrail mounting bracket 23 Mortar 24 Steel pipe 25 Bolt 26 Nut 30 Prefabricated stair 31 Handrail support metal 32 Coupling hardware 32a Mounting hole 33 Connection metal 34 Band metal fitting 34a Through hole 35 Band metal fitting 35a Through hole 36 Bolt 37 Nut 38 Bolt 39 Nut 40 Handrail reinforcement metal 40a Hole 41 Bolt 42 Nut 43 Band bracket 44 Band bracket 45 Bolt 46 Nut

Claims (5)

A plurality of step members each having a step board arranged horizontally and a kick board arranged perpendicular to the tread surface of the tread board are arranged side by side along an inclination direction, and the step members of each step Is a prefabricated staircase fixed in a staircase pattern on a bar-like member arranged in an inclined direction on an inclined surface,
A plurality of handrail support members attached to the rod-shaped member;
By connecting the lower end portion in the length direction to the handrail support member, a plurality of pillars erected at a position on the end side in the length direction of the step member;
A plurality of rod-shaped handrail members each having a longitudinal end connected to the longitudinal upper ends of the plurality of columns;
The prefabricated staircase, wherein the handrail support member is detachably connected to a lower end portion in a length direction of the support column. The handrail support member has two band members that are combined so as to face each other and are arranged so as to surround the outer peripheral surface of the support column from both sides,
2. The prefabricated staircase according to claim 1, wherein the handrail support member is connected to a lower end portion in a length direction of the support column by connecting the two band members to each other by screw fastening. The handrail support member has a coupling member,
The coupling member is formed by fastening a female screw portion of a nut to a male screw portion of a bolt that passes through a through hole formed in the rod-shaped member and a mounting hole formed so as to penetrate the coupling member. Fixed to the surface of the rod-shaped member facing the column,
In the mounting hole, the bolt and the nut are screwed according to the inclination angle of the rod-shaped member in order to maintain the angle of the coupling member in which the length direction of the support column is perpendicular to the tread plate. The prefabricated staircase according to claim 1, wherein the prefabricated staircase is formed so that the position can be changed. The mounting holes are respectively arranged at positions near both ends in the length direction of the coupling member, and the opening shape protrudes in a convex shape toward both ends in the length direction of the coupling member, so that the length direction center portion side The prefabricated staircase according to claim 3, wherein the prefabricated staircase is formed in an arc shape that is recessed in a concave shape. It has a plate-like handrail reinforcement member fixed to the surface opposite to the tread surface of the tread plate, and the end portion of the handrail reinforcement member in the length direction on the support column side is longer than the length direction end portion of the step member. The prefabricated staircase according to any one of claims 1 to 4, wherein the prefabricated staircase projects outward and is connected to the support column.

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