JP6779102B2 - Prefabricated stairs - Google Patents

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 body of the person climbing the stairs becomes unstable and in some cases, a handrail is attached.

12 to 14 are views for reference to explain the conventional prefabricated staircase 1 with a handrail. This prefabricated staircase 1 has been used as a staircase that can be easily attached to a mountain trail in a mountainous area or an inclined surface 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 riser plate 6 are integrally formed, are arranged in a staircase pattern.

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

Then, the nail member 12 was driven so as to penetrate the riser plate 6 and the mounting plate portion 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, steps are taken on two synthetic resin rod-shaped members 18 arranged parallel to each other in the inclined direction on the inclined surface 7 of the ground. The members 8 were arranged and fixed in a staircase pattern 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 tread plate 4 of each step member 8, the nail member 14 is rod-shaped from the tread surface 4a in the vicinity of the mounting plate portion 10 of the tread plate 4. It was driven toward the member 18 in a direction substantially perpendicular to the length direction of the rod-shaped member 18.

In this way, the step member 8 was fixed to the rod-shaped member 18 by the tip end side of the nail member 14 piercing 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 riser plate 6 of another step member 8 arranged on the upper side of the tread plate 4 so as not to be visible from the outside.

Further, as shown in FIG. 12, the anchor bolt 19 is inserted into the through hole formed through 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 screwing the female screw portions of each of the pair of nuts 15 from both the front and back sides in the direction.

Then, the rod-shaped member 18 was fixed on the inclined surface 7 by the end portion of the anchor bolt 19 on the underground side piercing the soil of the ground of the inclined surface 7.

In this way, by fixing each step member 8 on the rod-shaped member 18 arranged on the inclined surface 7, the step member 8 is above the inclined surface 7 without being directly affected by the unevenness of the inclined surface 7. It was supposed to be installed.

Further, as shown in FIG. 12, the lower right step member 8 in the lower right diagonal direction in the figure receives earth pressure in the direction along the inclined surface 7, the force of the water flow during rainfall, and the like, and the inclined surface 7 is shown. It was provided in contact with a pile 16 having a diameter larger than that of the anchor bolt 19 driven into the ground so as not to move to the downstream side in the lower right diagonal direction. The step member 8 was firmly supported by the resistance 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 distant from both ends of the step member 8 in the length direction (left-right direction in FIG. 13) to the outside in the length direction. Cylindrical steel pipes 24 were arranged at intervals in the middle upper left inclined direction. Most of the steel pipe 24 was embedded in the ground except for the open upper end portion, and the mortar 23 was filled between the inner peripheral surface thereof and the outer peripheral surface of the support column 20.

Therefore, the lower end of the cylindrical support 20 was inserted into the steel pipe 24 and fixed by the mortar 23 solidified in the steel pipe 24. As described above, the support column 20 was erected so as to extend upward in the vertical direction from the inclined surface 7 of the ground by fixing the lower end portion thereof with the mortar 23 in the steel pipe 24.

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

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

Then, the handrail mounting bracket 22 is attached to the upper end of the support column 20 by screwing a nut to the tip of the bolt that inserts both the through hole of the bottom plate portion of the handrail mounting bracket 22 and the through hole of the upper end portion of the support column 20. It was fixed.

Then, as shown in FIG. 13, the male screw portions of the bolt 25 are formed at both ends of the handrail mounting bracket 22 on the U-shaped opening side, respectively, and through holes penetrating in the left-right direction in FIG. 13 and the handrail. A through hole formed at the end of the beam 21 (handrail member) in the length direction and penetrating in the left-right direction in FIG. 13 was inserted together, and the female screw portion of the nut 26 was screwed to the tip of the male screw portion. ..

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

Utility Model Registration No. 3119522

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

Therefore, 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 increase the above-ground length dimension of the support column 20 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 above-ground length dimension of the support column 20 according to the shortened distance.

For example, as shown in FIG. 12, the support column 20 arranged on the right side in FIG. 12 arranged at a position where the vertical distance from the rod-shaped member 18 to the inclined surface 7 becomes long is from the rod-shaped member 18 to the inclined surface 7. It was necessary to be formed so that the length dimension on the ground was longer than that of the support column 20 arranged on the left side in FIG. 12 arranged at a position where the vertical distance to the above was shortened.

Therefore, when the prefabricated staircase 1 is installed on-site, it is necessary to manufacture a support column 20 having a length dimension corresponding to the uneven state of the inclined surface 7, which increases the construction cost and shortens the construction period. There was a problem that it became long.

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

In order to solve the above problems, the prefabricated staircase according to the present invention
A plurality of step members having a tread plate arranged horizontally and a riser plate arranged perpendicular to the tread surface of the tread plate are arranged side by side in a staircase pattern along an inclination direction, and the step member of each step is arranged. In a prefabricated staircase, which is fixed side by side in a staircase pattern on a rod-shaped 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 columns erected at positions on the end portion side in the length direction of the step member, and
A plurality of rod-shaped handrail members having both end portions in the length direction connected to each other are provided at the upper end portions of the plurality of columns in the length direction.
The handrail support member has two band members and a plate-shaped connecting member .
With one of the previous SL two band member is attached to said rod member through said coupling member, said the other two of the band member is detachably connected to the band member of the one,
The two band member is combined to face each other across a longitudinal lower part of the strut, the arranged outer peripheral surface of the strut so as to surround the both sides, each of the two bands member plate portion projecting from the circumferential direction of the both end portions on the outside by being connected to each other, are fixed to hold sandwiches the outer peripheral surface of the strut in the longitudinal direction lower end of the strut,
The connecting member is formed by fastening a female threaded portion of a nut to a male threaded portion of a bolt through which both a through hole formed in the rod-shaped member and a mounting hole formed so as to penetrate the connecting member are inserted. It is fixed to the surface of the rod-shaped member on the side facing the support column, and is fixed.
In the mounting hole, the bolt and the nut are screwed together according to the inclination angle of the rod-shaped member in order to maintain the angle of the connecting member whose length direction of the column is perpendicular to the tread plate. It is formed in an arc shape so that the position can be changed.
One surface of the plate-shaped coupling member is provided so as to come into contact with the surface of the rod-shaped member facing the support column.
The other surface of the plate-shaped connecting member is integrally bonded to the one band member via a plate-shaped connecting metal fitting.
The connecting hardware has a predetermined length in the length direction of the column and is formed in a plate shape having a predetermined thickness in the horizontal direction, and the connecting hardware is formed in each of the length direction and the thickness direction of the connecting hardware. One end of the connecting hardware perpendicular to the width direction is integrally connected to the outer peripheral surface of the one band member, and the other end is integrally connected to the other surface of the connecting member. It is a feature.

Further, the prefabricated staircase according to the present invention is
Before SL handrail support member by the plate portions of the two said band member are connected to each other by screw fastening, it is characterized in that it is connected in the longitudinal direction lower end of the strut.

Further, the prefabricated staircase according to the present invention is
The mounting holes are arranged at positions closer to both ends in the length direction of the coupling member, and the opening shape of the mounting holes projects convexly toward both ends in the length direction of the coupling member, and the central portion side in the length direction. It is characterized in that it is formed in an arc shape that is dented in a concave shape.

Further, the prefabricated staircase according to the present invention is
It has a plate-shaped handrail reinforcing member fixed to the surface opposite to the tread surface of the tread plate, and the end portion of the handrail reinforcing member on the column side in the length direction is from the end portion in the length direction of the step member. It is characterized in that it projects outward and is connected to the support column.

According to such a prefabricated staircase of the present invention,
A plurality of step members having a tread plate arranged horizontally and a riser plate arranged perpendicular to the tread surface of the tread plate are arranged side by side in a staircase pattern along an inclination direction, and the step member of each step is arranged. In a prefabricated staircase, which is fixed side by side in a staircase pattern on a rod-shaped 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 columns erected at positions on the end portion side in the length direction of the step member, and
A plurality of rod-shaped handrail members having both end portions in the length direction connected to each other are provided at the upper end portions of the plurality of columns in the length direction.
The handrail support member has two band members and a plate-shaped connecting member .
With one of the previous SL two band member is attached to said rod member through said coupling member, said the other two of the band member is detachably connected to the band member of the one,
The two band member is combined to face each other across a longitudinal lower part of the strut, the arranged outer peripheral surface of the strut so as to surround the both sides, each of the two bands member plate portion projecting from the circumferential direction of the both end portions on the outside by being connected to each other, are fixed to hold sandwiches the outer peripheral surface of the strut in the longitudinal direction lower end of the strut,
The connecting member is formed by fastening a female threaded portion of a nut to a male threaded portion of a bolt through which both a through hole formed in the rod-shaped member and a mounting hole formed so as to penetrate the connecting member are inserted. It is fixed to the surface of the rod-shaped member on the side facing the support column, and is fixed.
In the mounting hole, the bolt and the nut are screwed together according to the inclination angle of the rod-shaped member in order to maintain the angle of the connecting member whose length direction of the column is perpendicular to the tread plate. It is formed in an arc shape so that the position can be changed.
One surface of the plate-shaped coupling member is provided so as to come into contact with the surface of the rod-shaped member facing the support column.
The other surface of the plate-shaped connecting member is integrally bonded to the one band member via a plate-shaped connecting metal fitting.
The connecting hardware has a predetermined length in the length direction of the column and is formed in a plate shape having a predetermined thickness in the horizontal direction, and the connecting hardware is formed in each of the length direction and the thickness direction of the connecting hardware. By integrally connecting one end in the width direction of the connecting hardware perpendicular to the outer peripheral surface of the one band member and the other end to the other surface of the connecting member. ,
It is possible to provide a prefabricated staircase that can prevent the construction cost from increasing and shorten the construction period.

It is a 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 partially enlarged side view of the prefabricated staircase 30 of FIG. It is a partially enlarged front view of the prefabricated staircase 30 of FIG. 6 (a) is a plan view of the band metal fitting 35 constituting the handrail support hardware 31, and FIG. 6 (b) is a front view of the band metal fitting 35 of FIG. 6 (a). FIG. 7A is a plan view of the coupling hardware 32, the connecting 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. 7 (c) is a front view of the handrail support hardware 31 of FIG. 7 (a). FIG. 8A is a front view of the coupling metal fitting 32, and FIG. 8B is a front view of the band metal fitting 34. 9 (a) is a plan view showing the handrail reinforcing metal fitting 40, the band metal fittings 43, 44, the bolt 45, and the nut 46, and FIG. 9 (b) shows the handrail reinforcing metal fitting 40 and the band metal fitting of FIG. 9 (a). It is a front view of 43, 44, a bolt 45, and a nut 46. 10 (a) is a partially enlarged side view showing a mounting state of the coupling 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. 10 (b) is a partially enlarged side view of FIG. It is a partially enlarged side view which shows the mounting state of the coupling metal fitting 32 when the inclination angle of a rod-shaped member 18 is increased in the prefabricated stairs 30 of the above. 11 (a) 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. 11 (b) is a partially enlarged side view of the prefabricated staircase of FIG. It 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 type staircase 30. It is a side view of the conventional prefabricated staircase 1. It is a plan view which shows the prefabricated staircase 1 in FIG. It is the front view which shows the prefabricated staircase 1 in FIG.

Hereinafter, a mode for carrying out the prefabricated staircase according to the present invention will be specifically described with reference to the drawings.

1 to 11 are views for reference to explain the prefabricated staircase 30 according to the embodiment of the present invention. In the prefabricated staircase 30 shown in these figures, the same parts as those of the conventional prefabricated staircase 1 will be described with the same reference numerals, and overlapping description of the same configuration as the conventional one will be 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-shaped coupling metal fitting 32 (bonding member) has a length direction thereof in the length direction of the rod-shaped member 18. It is provided so as to be in contact with the surface of the rod-shaped member 18 on the side facing the support column 20. Further, a plurality of coupling hardware 32s are arranged at predetermined intervals in the length direction of the rod-shaped member 18 (see FIG. 1).

Further, as shown in FIGS. 4 and 8A, the bonding metal fitting 32 has a plate thickness at a position close to both ends in the length direction and substantially line-symmetrical with respect to the center portion in the length direction. Mounting holes 32a penetrating in the direction are formed respectively. Further, the opening shape of the mounting hole 32a is formed in an arc shape such that the coupling metal fitting 32 projects convexly toward both ends in the length direction and is recessed toward the center portion side in the length direction.

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

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

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

Further, as shown in FIG. 5, two substantially semi-cylindrical (see FIGS. 6 and 7) band metal fittings 34 and 35 (band members) are provided at the height position of the support column 20 where the connecting metal fitting 33 is provided. , 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 plate portions protruding from both ends in the circumferential direction so as to bend outward in the radial direction (left and right sides in FIG. 6A). Four through holes 35a are formed in the portion (see FIG. 6B).

Further, as shown in FIG. 7, the band metal fitting 34 is formed with plate portions protruding from both ends in the circumferential direction so as to bend outward in the radial direction (left and right sides in FIG. 7A). Four through holes 34a are formed in this plate portion (see FIGS. 7 (c) and 8 (b)).

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 inserted into the male threaded portion of the bolt 38. The female threaded portion of the nut 39 is screwed (see FIG. 5).

In this way, 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 end of the connecting hardware 33 on the support column 20 side (left side in FIG. 5) in the width direction (left-right direction in FIG. 5) is a semi-cylindrical portion of the band metal fitting 34. It is fixed to the central part of the outer peripheral surface in the circumferential direction by welding or the like.

As described above, unlike the conventional prefabricated staircase 1, the prefabricated staircase 30 according to the present embodiment has a lower end portion of the support column 20 composed of a coupling metal fitting 32, a connecting metal fitting 33, and band metal fittings 34, 35. It is attached to the rod-shaped member 18 via the handrail support hardware 31 (handrail support member).

Therefore, even if the uneven state of the inclined surface 7 on the ground changes, it is not necessary to change the length dimension of the support column 20. That is, any of the length dimensions of the columns 20 can be used with a constant length dimension.

Therefore, when the prefabricated stairs 30 are installed on-site, it is not necessary to manufacture the columns 20 having a length dimension according to the uneven state of the inclined surface 7 on the ground, so that the construction cost can be prevented from increasing and the construction cost can be prevented. The construction period can be shortened.

Further, since the mounting hole 32a of the coupling metal fitting 32 is formed so that the opening shape thereof is an arc shape (see FIG. 8A), the rod-shaped member 18 with respect to the horizontal direction depends on the uneven state of the inclined surface 7. Even if the inclination angle changes, 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 horizontal angle of the coupling hardware 32. 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 of the coupling hardware 32 with respect to the horizontal direction can be maintained. Therefore, the length direction of the support column 20 changes the inclination angle of the rod-shaped member 18. It is possible to erect the columns 20 so as to be perpendicular to the horizontally arranged tread plates 4 without being tilted.

For example, the bolt 36 has a rod shape even when the inclination angle of the rod-shaped member 18 with respect to the horizontal direction is small as shown in FIG. 10A and when the inclination angle of the rod-shaped member 18 with respect to the horizontal direction is large as shown in FIG. 10B. By changing the position where the bolt 36 and the nut 37 are screwed together so as to insert the through hole 18a (see FIG. 5) formed in the member 18, the length direction of the support column 20 is perpendicular to the tread plate 4. Moreover, the coupling metal fitting 32 can be fixed to the rod-shaped member 18 so as to be in the vertical direction.

By the way, the range of the inclination angle of the rod-shaped member 18 that can be attached to the rod-shaped member 18 without changing the angle of the coupling metal fitting 32 with respect to the horizontal direction is determined by the opening shape of the mounting hole 32a and the position where it is formed. To.

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

Further, since the band metal fittings 34 and 35 are fixed to the support column 20 by screwing the bolt 38 and the nut 39, the rod-shaped member 18 can be changed by changing the fixing position of the band metal fittings 34 and 35 to the support column 20. The height dimension up to the handrail beam 21 (handrail member) can be adjusted.

For example, when it is desired to increase the height dimension from the rod-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 support column 20 (the support column 20 in FIG. 1). The bolt 38 and the nut 39 (see FIG. 5) are screwed so that the band metal fittings 34 and 35 can be fixed to the position below the position where the band metal fittings 34 and 35 at the lower end of the above 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. 11B, the upper position in the drawing at the lower end of the support column 20 (in FIG. 1, the support column 20 The bolt 38 and the nut 39 (see FIG. 5) are screwed together so that the band metal fittings 34 and 35 can be fixed to the position above the position where the band metal fittings 34 and 35 at the lower end are fixed).

In this way, since the band metal fittings 34 and 35 are detachably fixed to the support column 20, the handrail beam from the rod-shaped member 18 can be obtained simply by changing the fixing position of the band metal fittings 34 and 35 to the support column 20 in the vertical direction. The height dimension up to 21 can be freely adjusted.

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 from increasing 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 via the handrail support metal fitting 31, the support column 20 is attached to the handrail reinforcement metal fitting 40 (handrail reinforcement member) and the band metal fittings 43 and 44. It is fixed to the step member 8 via.

The metal plate-shaped handrail reinforcing metal fitting 40 is arranged so that the upper surface thereof contacts the back surface of the tread plate 4 on the opposite side to the tread surface 4a. Then, the handrail reinforcing metal fitting 40 is fixed to the tread plate 4 of the step member 8 by screwing two sets of bolts 41 and nuts 42 (see FIG. 5).

As shown in FIG. 2, the handrail reinforcing metal fitting 40 has a length dimension of less than half of the length dimension of the tread plate 4 (left-right direction in FIG. 2), and each position of the tread plate 4 near both ends in the length direction. It is arranged so that its length direction is substantially parallel to the length direction of the tread plate 4.

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 toward the opposite side of the tread surface 4a, and the handrail is reinforced. A through hole 40a (see FIG. 9) for inserting the bolt 41 is also formed in the horizontal plate portion of the hardware 40.

Further, at the upper end of the through hole through which the bolt 41 of the tread plate 4 is inserted, the diameter from the upper end of 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).

Therefore, when the male screw 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 who gets on the tread surface 4a of the tread plate 4 The shoes are prevented from getting caught in the head of the bolt 41.

Then, the lower end 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 reinforcing metal fitting 40, and then screwed to the female screw portion of the nut 42 to screw the handrail reinforcing metal fitting 40. Is fixed to the back surface of the tread surface 4a of the tread plate 4.

Further, 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 where the handrail reinforcing metal fitting 40 is provided on the support column 20. , The support column 20 is arranged so as to surround the outer peripheral surface from both sides (see FIG. 9).

Further, the band metal fittings 43 and 44 are formed with plate portions protruding from both ends in the circumferential direction so as to bend outward in the radial direction (both left and right sides in FIG. 4), and through holes are formed in these plate portions. Are formed respectively (see FIG. 9).

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

In this way, 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, in the handrail reinforcing metal fitting 40, the end portion on the support column 20 side (left side in FIG. 5) in the length direction is the center in the circumferential direction of the outer peripheral surface of the semi-cylindrical portion of the band metal fitting 43. It is fixed to the portion and the central portion in the height direction by welding or the like (see FIG. 9).

As described above, since the support column 20 of the prefabricated staircase 30 is fixed to the step member 8 via the handrail reinforcing metal fittings 40 and the band metal fittings 43 and 44, for example, when a person holds the handrail beam 21, the handrail beam Even when a force in the lateral direction (horizontal direction in FIG. 2) is applied to 21, the support column 20 does not fall in the lateral direction (horizontal direction in FIG. 2), and the handrail beam 21 is compared with the case where only the handrail support hardware 31 is used. It is possible to improve the strength of the.

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

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

The present invention is not limited to the present embodiment, and various modifications can be made 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, but in that case, recycled plastic is used. However, it goes without saying that a material 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 metal fitting 32 and the handrail reinforcing metal fitting 40 is formed to be rectangular, but it is not necessary to be limited to such a shape. However, 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 reinforcing metal fitting 40. Although the configuration is shown, it is not necessary to limit the number to two sets, and more than two sets may be provided.

Further, in the prefabricated staircase 30 according to the present embodiment, the mounting hole 32a of the coupling metal fitting 32 is formed so that its opening shape is an arc shape, but the shape is not limited to such a shape. However, 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 coupling metal fitting 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. May be 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 the shape is not limited to such a shape, and is formed in a square tubular shape, for example. You may be.

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

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 ends in the length direction of the step member 8, but such a configuration. It is not necessary to be limited to, and it may be configured to be provided only in the vicinity of one end portion in the length direction of the step member 8.

Further, in the prefabricated staircase 30 according to the present embodiment, one step member 8 is provided for each step of the staircase, but it is not necessary to be limited to such a configuration, and each step member 8 is provided in the length direction. A plurality of connected step members 8 may be provided in each of the steps.

Further, in the prefabricated staircase 30 according to the present embodiment, as shown in FIG. 2, the handrail reinforcing metal fitting 40 is formed so as to have a length dimension of half or less of the length dimension of the tread plate 4. , 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 total length dimension.

Further, 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 positions of the band metal fittings 34 and 35 with respect to the support column 20. However, it is not necessary to be limited to such a configuration, and the height dimension from the rod-shaped member 18 to the handrail beam 21 can be freely adjusted by another method. It may have been.

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

1 Prefabricated stairs 4 Stepping board 4a Stepping surface 6 Lifting board 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 Prop 21 Handrail beam 22 Handrail mounting bracket 23 Mortal 24 Steel pipe 25 Bolt 26 Nut 30 Prefabricated stairs 31 Handrail support hardware 32 Bonding hardware 32a Mounting hole 33 Connection hardware 34 Band metal fittings 34a Through hole 35 Band metal fittings 35a Through hole 36 Bolt 37 Nut 38 Bolt 39 Nut 40 Handrail reinforcement 40a Holes 41 Bolts 42 Nuts 43 Band Brackets 44 Band Brackets 45 Bolts 46 Nuts

Claims (4)

A plurality of step members having a tread plate arranged horizontally and a riser plate arranged perpendicular to the tread surface of the tread plate are arranged side by side in a staircase pattern along an inclination direction, and the step member of each step is arranged. In a prefabricated staircase, which is fixed side by side in a staircase pattern on a rod-shaped 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 columns erected at positions on the end portion side in the length direction of the step member, and
A plurality of rod-shaped handrail members having both end portions in the length direction connected to each other are provided at the upper end portions of the plurality of columns in the length direction.
The handrail support member has two band members and a plate-shaped connecting member .
With one of the previous SL two band member is attached to said rod member through said coupling member, said the other two of the band member is detachably connected to the band member of the one,
The two band member is combined to face each other across a longitudinal lower part of the strut, the arranged outer peripheral surface of the strut so as to surround the both sides, each of the two bands member plate portion projecting from the circumferential direction of the both end portions on the outside by being connected to each other, are fixed to hold sandwiches the outer peripheral surface of the strut in the longitudinal direction lower end of the strut,
The connecting member is formed by fastening a female threaded portion of a nut to a male threaded portion of a bolt through which both a through hole formed in the rod-shaped member and a mounting hole formed so as to penetrate the connecting member are inserted. It is fixed to the surface of the rod-shaped member on the side facing the support column, and is fixed.
In the mounting hole, the bolt and the nut are screwed together according to the inclination angle of the rod-shaped member in order to maintain the angle of the connecting member whose length direction of the column is perpendicular to the tread plate. It is formed in an arc shape so that the position can be changed.
One surface of the plate-shaped coupling member is provided so as to come into contact with the surface of the rod-shaped member facing the support column.
The other surface of the plate-shaped connecting member is integrally bonded to the one band member via a plate-shaped connecting metal fitting.
The connecting hardware has a predetermined length in the length direction of the column and is formed in a plate shape having a predetermined thickness in the horizontal direction, and the connecting hardware is formed in each of the length direction and the thickness direction of the connecting hardware. One end of the connecting hardware perpendicular to the width direction is integrally connected to the outer peripheral surface of the one band member, and the other end is integrally connected to the other surface of the connecting member. Characterized prefabricated stairs. Before SL handrail support member by the plate portions of the two said band member are connected to each other by screw fastening, according to claim 1, characterized in that it is connected in the longitudinal direction lower end of the strut Prefabricated stairs. The mounting holes are arranged at positions closer to both ends in the length direction of the coupling member, and the opening shape of the mounting holes projects convexly toward both ends in the length direction of the coupling member, and the central portion side in the length direction. The prefabricated staircase according to claim 1 or 2 , wherein each of the stairs is formed in an arc shape that is concavely recessed. It has a plate-shaped handrail reinforcing member fixed to the surface opposite to the tread surface of the tread plate, and the end portion of the handrail reinforcing member on the column side in the length direction is from the end portion in the length direction of the step member. The prefabricated staircase according to any one of claims 1 to 3, wherein the staircase projects outward and is connected to the support column.

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