Temporary scaffold and stairs for temporary scaffold

Abstract

To allow movement to treads of different heights on temporary scaffolds to be easily performed.SOLUTION: A temporary scaffold 10 comprises: a plurality of treads 40 on which people can walk; a plurality of brackets 30 supporting the plurality of treads 40; and a plurality of supports 20 which has an axis perpendicular to the ground and to which each support member is fixed. The plurality of treads 40 has: a rectangular-shaped first tread 40A; and a rectangular-shaped second tread 40B which is arranged in line in a longitudinal direction of the first tread 40A and has a width dimension smaller than the first tread 40A; and it comprises stairs 50, 60 in a lateral area of the second tread 40B that allow people to ascend to and descend from the second tread and a position lower than it.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to temporary scaffolding and stairs for temporary scaffolding. [Background technology]

[0002] Conventionally, when extension, reconstruction, or repair work (painting, etc.) is carried out on buildings such as condominiums or detached houses, temporary scaffolding is assembled around the building for on-site workers to work at height. Temporary scaffolding is made up of metal pipes assembled vertically and horizontally on the ground, with many horizontal cross arms installed at the same height or at different heights, and many treads are placed side by side on the many cross arms.

[0003] Each step is rectangular, and its longitudinal end is supported on an arm to fix the position of the step and allow people to walk on the step. Many steps are arranged side by side in the longitudinal direction and also in multiple rows in the lateral direction. Stairs are installed so that on-site workers can move between steps at different heights. Above the position where the stairs are installed, a space is formed where no steps are installed so that people going up and down can pass through (see Patent Document 1 below). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-36572 Summary of the Invention [Problem to be solved by the invention]

[0005] However, depending on the conditions of the building site, etc., the distance between the building on which the temporary scaffolding is to be installed and the adjacent building may be narrow, and sufficient space for installing the temporary scaffolding may not be secured. In such a case, it is possible to reduce the number of steps from multiple rows to one row in the short direction of the steps, so that the temporary scaffolding can be installed in a narrow site. However, if the steps are arranged in a single row, the space for the steps that was previously provided on the adjacent rows of steps is lost, and stairs cannot be installed in the adjacent rows, so there is a problem that it is not easy to move between steps of different heights. Therefore, in order to move to a step of a different height, it is necessary to provide a ladder extending vertically or for the worker to grab a brace that is provided diagonally between metal pipes for reinforcement and climb up to the upper step, which causes a problem that it is not easy to move to a step of a different height.

[0006] One objective of the present disclosure is to provide technology that enables users to easily move between steps of different heights in temporary scaffolding, whose width can be easily reduced. [Means for solving the problem]

[0007] A temporary scaffolding which is one aspect of the present disclosure is a temporary scaffolding comprising a plurality of steps on which people can walk, a plurality of support members which support the plurality of steps, and a plurality of support columns which extend upwardly relative to the ground and to which each of the support members is fixed, wherein the plurality of steps include a longitudinal first step and a longitudinal second step which is arranged in line in the longitudinal direction of the first step and has a smaller width dimension than the first step, and a staircase is provided in a lateral area of ​​the second step to enable people to ascend and descend between the second step and a position lower than the second step.

[0008] The present disclosure relates to a staircase for temporary scaffolding, which comprises a plurality of steps, each of which has a longitudinal first tread and a longitudinal second tread arranged in line with the longitudinal direction of the first tread and has a smaller width dimension than the first tread, a plurality of support members supporting the plurality of treads, and a plurality of support columns to which each of the support members is fixed, and which allows for movement up and down in an inclined direction relative to the plurality of treads in the temporary scaffolding, and which is arranged in an area to the side of the second tread. Effect of the Invention

[0009] According to the technology disclosed herein, in a temporary scaffolding whose width size can be easily reduced, users can easily move between steps of different heights. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view showing a temporary scaffolding according to a first embodiment; [Diagram 2] A plan view showing the second and third floors, including the second tread and stairs, with other parts omitted. [Diagram 3] A plan view of the first floor, including the second step and stairs, with other parts omitted. [Figure 4] Side view showing the hooked stairs between the first and second levels and between the second and third levels [Diagram 5] Side view showing a staircase with a movable wedge between the ground and the first floor [Figure 6] Plan view showing a staircase with a movable wedge between the ground and the first floor [Figure 7] FIG. 1 is a plan view showing the second step and the stairs of the second embodiment, with other parts omitted. [Figure 8] Side view of a staircase with wedges for fastening to a receiving part DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] A temporary scaffolding which is one aspect of the present disclosure is a temporary scaffolding comprising a plurality of steps on which people can walk, a plurality of support members which support the plurality of steps, and a plurality of support columns which extend upwardly relative to the ground and to which each of the support members is fixed, wherein the plurality of steps include a longitudinal first step and a longitudinal second step which is arranged in line in the longitudinal direction of the first step and has a smaller width dimension than the first step, and a staircase is provided in a lateral area of ​​the second step to enable people to ascend and descend between the second step and a position lower than the second step. This temporary scaffolding can arrange the first step and the second step, which has a smaller width dimension, side by side in the width direction, so that the step plates arranged in the longitudinal direction ensure a walking area, while the width dimension of part of the walking area (the second step) can be reduced to expand the space to the side of the second step. In addition, the expanded side space can be used to arrange stairs, allowing people to go up and down. Even if the space (particularly the width space) for installing the temporary scaffolding is insufficient, the width of the temporary scaffolding can be reduced by using the expanded side space to install stairs, so that the temporary scaffolding's width size can be easily reduced, and users can easily move to steps of different heights.

[0012] In the above-mentioned temporary scaffolding, the staircase may include a base, a plurality of step sections provided at predetermined intervals on the base for people to walk on when ascending or descending, and a locking section provided on at least one end side of the base and locked to at least one of the support member and the support column. In this way, a staircase for people to ascend and descend can be formed with a simple configuration.

[0013] In the above temporary scaffolding, the support member may be a bracket fixed to the support column, and the bracket may include a horizontal support portion extending along the horizontal direction. The stairs may include a pair of the locked portions that are locked to the horizontal support portion. In this way, the pair of locked portions are locked to the bracket, thereby enabling the stairs to be held in a stable position.

[0014] In the above-mentioned temporary scaffolding, the support pole may have a receiving portion that receives the locked portion at a predetermined height. In this way, the locked portion is received by the receiving portion of the support pole, so that the structure for locking the stairs can be reduced or omitted for the support member. For example, it becomes possible to use a larger portion of the support member for placing the second tread.

[0015] In the above-mentioned temporary scaffolding, a through hole may be formed in the receiving portion, and the locked portion may be press-fitted into the through hole. In this way, the stairs can be firmly fixed to the support portion with a simple operation.

[0016] In the above-mentioned temporary scaffolding, the locked portion may be rotatably connected to the end portion of the base portion. In this way, the position of the locked portion can be easily moved relative to the base portion, thereby improving the degree of freedom in the position where the stairs are installed.

[0017] In the above temporary scaffolding, the base may have a base body and an expandable part that can change the length relative to the base body. In this way, the length of the stairs can be changed by the expandable part of the base, so that even when the position of the receiving part that engages the locked part of the stairs is changed, the locked part can be engaged with the receiving part at a different position to install the stairs.

[0018] In the above temporary scaffolding, the first step boards and one or more second step boards may be arranged in the longitudinal direction on a predetermined step and supported by the support members arranged on the predetermined step. Furthermore, the second step boards may be arranged in the longitudinal direction on the predetermined step, and the first step boards may be arranged so as to protrude further to the other width direction side than the second step boards. Furthermore, the first step boards and one or more second step boards may be arranged in the longitudinal direction on a step lower than the predetermined step and supported by the support members arranged on the lower step. Furthermore, the second step boards may be arranged in the longitudinal direction on the lower step, and the first step boards may be arranged so as to protrude further to the other width direction side than the second step boards. The side area on the other width direction side of the second tread on the specified step may be an area where the tread is not arranged, and the side area on the other width direction side of the second tread on the lower step may be an area where the tread is not arranged. Furthermore, the staircase may be provided so as to straddle the side area on the other width direction side of the second tread on the specified step and the side area on the other width direction side of the second tread on the lower step. The upper surface portion of the first tread may be integrally formed, and the upper surface portion of the second tread may be integrally formed. The width of the step portion of the staircase may be smaller than the width of the first tread. In this way, in the temporary scaffolding, step areas (areas in which multiple step boards are lined up in the longitudinal direction) on which people can walk can be secured in the longitudinal direction on each of the predetermined step and steps lower than the predetermined step, and the width size of these step board areas can be restricted to a size that does not deviate significantly from the width size of the first step board of which the upper surface part is integrally formed. Furthermore, since a narrow area (second step board) is provided in a part of the step board area of ​​each step, it is possible to secure step boards while further restricting the width in a part of the step board area with a restricted width. The second step boards are arranged in a configuration in which they are lined up close to one side in the width direction of the first step board, and the multiple first step boards are arranged in a configuration in which they protrude further in the width direction than the second step board, and the side area on the other side in the width direction of each second step board is an area where no step board is arranged, so that a wider space is secured in the side area on the other side in the width direction of the second step board. A staircase is provided in such a space, and the staircase is arranged to straddle the lateral area on the other width direction side of the second tread at a given step and the lateral area on the other width direction side of the second tread at a lower step, and since the width of the step portion is smaller than the width of the first tread, the configuration is not bulky in the width direction and makes it easy to move to treads of different heights. In particular, since the end on the other width direction side of the second tread is recessed in the above-mentioned lateral area, the user can enter one side in the width direction beyond the end on the other width direction side of the first tread, and therefore the user can move with even more space when using the staircase to straddle up and down the "tread area with a reduced width direction size".

[0019] In the above temporary scaffolding, the width of the second tread may be at least half the width of the first tread. This ensures that the second tread has a dimension that allows people to walk on it without any problems, while also ensuring space to install stairs on the side of the second tread.

[0020] The present disclosure provides a staircase for a temporary scaffold, which includes a first longitudinal tread and a second longitudinal tread arranged in line in the longitudinal direction of the first tread and smaller in width than the first tread, a plurality of support members supporting the first treads, and a plurality of support columns to which the support members are fixed, and which allows users to ascend and descend in a direction inclined to the first treads, and which is disposed in an area to the side of the second tread. This staircase for a temporary scaffold allows users to easily move between treads of different heights in a temporary scaffold in which the width is easily reduced.

[0021] <Embodiment 1> A first embodiment will be described with reference to Figs. 1 to 6. In the following, the same components are denoted by the same reference numerals and the description will be omitted. The temporary scaffolding 10 is provided so as to surround the entire periphery of, for example, a building B. In Fig. 1, the temporary scaffolding 10 on one side of the building B is illustrated, and the temporary scaffolding on the other side of the building B is omitted. In this embodiment, the temporary scaffolding 10 is a one-side scaffolding that is assembled and installed around the building B, which has a narrow site. The one-side scaffolding has a support portion 20 provided only on one side in the width direction (short side direction) of a rectangular tread 40, and the multiple support portions 20 aligned in a row along the longitudinal direction of the tread 40 support the multiple treads 40 aligned in a row.

[0022] As shown in FIG. 1, the temporary scaffolding 10 comprises a plurality of support pillars 20 arranged in a row at equal intervals, a plurality of brackets 30 (an example of a "support member") fixed to each support pillar 20, a plurality of steps 40 spanning between adjacent brackets 30, and a plurality of stairs 50, 60 for people to ascend and descend to the steps 40 of different heights.

[0023] The support part 20 includes a support body 21, a square base plate 22A laid on the ground, and a jack 22B disposed between the support body 21 and the base plate 22A. The jack 22B has a flat plate placed on the base plate 22A and a shaft part standing vertically to the flat plate, and the shaft part is provided with a rotation operation part that can be rotated by a person. When the upper end of the shaft part of the jack 22B is connected to the lower end of the support body 21, the height of the support part 20 is adjusted by rotating the rotation operation part. Each support part 20 is provided in an axial shape so as to extend upward relative to the ground, and each support part 20 is configured to have each bracket 30 fixed thereto. The support part 20 is placed on the ground and supported by the ground, and extends upward from the ground in a rod-like or column-like shape. The support pole 20 may extend vertically from the ground or may extend at a slight angle relative to the vertical. The support pole 20 is configured to have a bracket 30 (support member) fixed thereto, which will be described later.

[0024] The support body 21 is, for example, axially and cylindrically configured, and has a hollow rod-like shape. The support body 21 is provided with the receiving part groups 23 at equal intervals in the axial direction (vertical direction) of the support body 21. In this embodiment, the support body 21 is provided with the receiving part groups 23 at 45 cm intervals in the axial direction. The intervals between the receiving part groups 23 are not limited to this, and can be different intervals. The receiving part groups 23 may be configured to be fixed to the support body 21, or may be configured to be integrally provided with the support body 21. In this specification, the vertical up-down direction is defined as the up-down direction, and in the representative example shown in FIG. 1, etc., the direction in which the support part 20 extends is defined as the up-down direction. Among the directions perpendicular to the up-down direction, the direction in which the multiple support parts 20 are lined up is defined as the left-right direction. In the example of FIG. 1, the longitudinal direction of the step board 40 is defined as the left-right direction. The direction perpendicular to the up-down direction and the left-right direction is defined as the front-rear direction. 1, the direction in which the bracket 30 and the horizontal support portion 31 extend is defined as the front-rear direction. The front-rear direction is defined as the width direction of the step board 40.

[0025] Each receiving part group 23 includes four receiving parts 23A to 23D (see FIG. 6) spaced apart from each other in the circumferential direction. Each receiving part 23A to 23D is provided to protrude in the radial direction of the support body 21, and includes a pair of receiving parts 23A, 23C provided on opposite sides of each other, and a pair of receiving parts 23B, 23D provided at positions shifted in the axial direction from the receiving parts 23A, 23C and shifted by 90 degrees in the circumferential direction. Each receiving part 23A to 23D has a rectangular through hole 24 penetrating in the axial direction (vertical direction). Note that the shape of the through hole 24 is not limited to this, and may be, for example, a circular shape or a polygonal shape. The receiving parts 23A to 23D of this embodiment use fastening parts (pocket parts) into which wedge-shaped metal pieces can be driven. Handrails 15 are provided at predetermined intervals in the vertical direction on the receiving parts 23A at the same height in the adjacent support parts 20, as shown in FIG. 1. The handrails 15 are provided above and below the treads 40 with a gap between them, and the handrails 15 have wedges at both the left and right ends that protrude downward and are press-fitted into the receiving portions 23A.

[0026] The pillar body 21 is formed by connecting multiple split pillars in the axial direction. The split pillars are configured so that the diameter of one end in the axial direction is slightly smaller than the other end, and the upper and lower split pillars are interlocked and connected. Pin holes are formed at both ends of the split pillars, and the connection state between the split pillars is maintained by inserting pins into the pin holes in the connected state. In this embodiment, 2.7m and 3.6m split pillars are connected, and the length of the upper and lower split pillars is switched between the adjacent pillar parts 20. Note that the length and arrangement of the split pillars are not limited to this, and they can be configured to have any length and arrangement.

[0027] Each bracket 30 is fixed to the support column 20 and extends horizontally from the position where it is fixed to the support column 20. As shown in Fig. 1, the bracket 30 includes a rod-shaped horizontal support portion 31 having a horizontal axis, and an inclined portion 33 extending in a direction inclined with respect to the horizontal direction, and the base end side of the horizontal support portion 31 and the base end side of the inclined portion 33 are connected by a vertical connecting portion 34.

[0028] A wedge portion 32 (see Figs. 2 and 3) protruding downward is formed at the base end (end on the support column 20 side) of the horizontal support portion 31. The bracket 30 is positioned relative to the support column 20 by inserting (pressing) the wedge portion 32 into the through hole 24 of the receiving portion 23C. At this time, the base end of the inclined portion 33 is in contact with the side surface of the support column 20, and the horizontal support portion 31 is fixed so as to be held in a horizontal state. The tip of the horizontal support portion 31 also protrudes downward in a wedge shape, and can be used to fix the horizontal support portion 31 to the support column when forming a two-sided scaffold. The example disclosed in Figs. 1 to 3 is an example in which the horizontal support portion 31 is fixed to the support column 20 so as to extend along the horizontal direction, but other configurations may be adopted as long as the horizontal support portion 31 can be fixed. A step board 40 is placed across adjacent brackets 30 fixed to the receiving portions 23C of adjacent support columns 20.

[0029] Each step 40 is a plate-shaped member that can be walked on by a person and is configured as a floor material for a person to stand on and walk on. The step 40 supports the person from below when the person is standing on the step 40. Each step 40 is made of metal such as iron, steel, or aluminum, and as shown in FIG. 2, includes a plate-shaped step body 41 and a locking retaining portion 42 that is provided at both ends of the step body 41 and is locked to the bracket 30 to hold the position of the step body 41. The step body 41 includes a frame portion and a mesh portion made of a mesh-shaped metal that is provided in the space inside the frame portion. The step body 41 is configured in a longitudinal shape and has a rectangular shape when viewed from above (when installed). The longitudinal direction of the step body 41 when viewed from above (rectangular shape) in a plan view is the longitudinal direction of the step 40, and the lateral direction of the step body 41 when viewed from above (rectangular shape) is the lateral direction of the step 40. The thickness direction of the rectangular top surface (the plate portion on which a person stands) of the step body 41 is the up-down direction, and the longitudinal direction of the step 40 is perpendicular to the thickness direction and corresponds to the long side direction of the top surface (plate portion). The short side direction of the step 40 is perpendicular to the longitudinal direction and the thickness direction and corresponds to the short side direction of the top surface (plate portion).

[0030] A pair of locking retaining portions 42 are provided at both ends of the tread body 41 in the longitudinal direction, and are provided at each end of the tread body 41 with a gap in the lateral direction of the tread body 41. The locking retaining portions 42 are hook-shaped, and the horizontal support portion 31 is allowed to enter through the opening of the hook, and the horizontal support portion 31 that has entered the hook is prevented from coming out by a slide portion that changes the opening width. The locking retaining portions 42 extend in the longitudinal direction of the tread body 41 toward the side away from the tread body 41, and are arranged in such a manner that they are placed on the horizontal support portion 31. When the locking retaining portions 42 on both sides of the tread body 41 are locked to the horizontal support portions 31, the tread body 41 is restricted from moving in the longitudinal and lateral directions.

[0031] The plurality of steps 40 includes a first step 40A and a second step 40B having a smaller width dimension than the first step 40A. The second step 40B is arranged in a line at a different position in the longitudinal direction relative to the first step 40A. The second step 40B is bridged between adjacent brackets 30 so that the side (side edge) of the second step 40B on the building B side is aligned with the side (side edge) of the first step 40A on the building B side in the lateral direction. In each step, the second step 40B is arranged closer to one side in the width direction of the first step 40A. In each step, the side edge of one side in the width direction of the plurality of first step 40A and the side edge of one side in the width direction of the second step 40B are arranged in a line along a predetermined direction. Each step is recessed so that the widthwise position of the side edge on the other side of the second step 40B is closer to one side in the width direction than the widthwise position of each side edge on the other side of the multiple first step 40A.

[0032] The temporary scaffolding 10 of this embodiment is provided with a plurality of steps, each of which is made up of a plurality of treads 40 arranged in a predetermined direction, spaced apart in the vertical direction. In the example of FIG. 1, in each step (each layer) 10A-10C in which the treads 40 are arranged, a plurality of (three in this embodiment) first treads 40A and one second tread 40B are provided. In the example of the temporary scaffolding 10 of FIG. 1, when one step (layer) is ascended, the position of the second tread 40B is shifted to the position of the first tread 40A adjacent to the right. The first tread 40A is configured so that the first width portion continues in the longitudinal direction for a first predetermined range. In the example of FIG. 2, the width of the portion of the first tread 40A that is the maximum width is the first width. The second tread 40B is configured so that the portion of the second tread 40B that is the maximum width is the second width. In the example of FIG. 2, the width of the portion of the second tread 40B that is the maximum width is the second width. In this embodiment, the length of the first step 40A and the second step 40B is 180 cm, the width of the first step 40A (the first width) is 40 cm, and the width of the second step 40B (the second width) is 25 cm. That is, the width of the second step 40B is half or more and four-fifths or less of the width of the first step 40A. As a result, the side (edge) of the front side (stairs side) of the second step 40B is recessed relative to the side (edge) of the first step 40A. The dimensions and lengths of the first step 40A and the second step 40B are not limited to these and can be changed to any appropriate values.

[0033] 1, in the area to the side of the second step 40B, stairs 50, 60 are provided on each step (each floor) to allow people to ascend and descend between the second step 40B and the lower side. Specifically, stairs 50 are provided between the first step (first floor) 10A and the second step (second floor) 10B, and between the second step (second floor) 10B and the third step (third floor) 10C, and stairs 60 are provided between the ground and the first step (first floor) 10A.

[0034] Both stairs 50, 60 are made of metal such as iron or aluminum, and as shown in Figures 2 and 3, the two stairs 50 have a base portion 51, a step portion 52, and an engaged portion 53, and the one staircase 60 has a base portion 61, a step portion 52, and an engaged portion 65.

[0035] The base 51 is a longitudinal (shaft-like, rod-like, etc.) part that is arranged across two horizontal support parts 31 so that a part near one end of the base 51 is supported by the horizontal support part 31 provided on one of the steps, and a part near the other end of the base 51 is supported by the horizontal support part 31 provided on the other step, and is arranged to extend at an angle with respect to the up-down direction. The part of the base 51 that is maximum width in the front-rear direction (width direction) is smaller in width than the part of the second step 40B that is maximum width in the front-rear direction (width direction). In the example of FIG. 2, the base 51 includes a rod-like part 51A with a constant cross-sectional shape and a branch part 51B that is divided into a U-shape, and the cross-sectional shape can be any shape such as a circle, an oval, a rectangle, etc. The rod-like part 51A in this embodiment is linear, but is not limited to this and may be curved. For example, the base may be curved over its entire length.

[0036] A pair of engaging portions 53 are provided at the tip of branch portion 51B. Step portion 52 is a rectangular plate of a certain thickness, and has unevenness on its upper surface to prevent slipping when stepped on. The width of the portion of step portion 52 that is at its maximum in the width direction (front-rear direction) is smaller than the width (the above-mentioned second width) of second step board 40B in the width direction (front-rear direction).

[0037] As shown in FIG. 4, each of the locked portions 53 is an annular hook that can be fixed to the horizontal support portion 31 of the bracket 30. Each hook is hook-shaped, and the horizontal support portion 31 is allowed to enter through an opening, and the horizontal support portion 31 that has entered the hook is prevented from coming off by a slide portion that changes the opening width. The distance between the pair of locked portions 53 is set according to the difference between the width dimension of the first step board 40A and the width dimension of the second step board 40B, and can be approximately the same as the width dimension of the step portion 52 or slightly smaller than the width dimension of the step portion 52. In the example of FIG. 2, the distance between the pair of locked portions 53 is smaller than the distance between the pair of locking retaining portions 42. The width of the maximum width portion of the pair of locked portions 53 is smaller than the width in the width direction (front-rear direction) of the second step board 40B (the second width described above).

[0038] As shown in Figs. 5 and 6, the base 61 includes a cylindrical base body 62, an expandable / contractable section 63 coaxially connected to the base body 62, and a rotatable pivot section 64 provided at both axial end sides of the base 61. The cross-sectional outer shape of the base body 62 can be any shape, such as a circle, an oval, or a rectangle. The expandable section 63 has a smaller diameter than the outer diameter of the base body 62, and is inserted into the inside of the base body 62 to expand or contract the entire length of the base 61. The pivot section 64 is rotatably connected to the ends of the base body 62 and the expandable section 63 by pins P at both axial end sides of the base 61.

[0039] The step portions 52 are rectangular flat plates on which people can place their feet, are arranged at equal intervals in the axial direction of the base 61, and are fixed to the base body 62 by a fixing means such as welding. Anti-slip irregularities are formed on the upper surface of the step portions 52. When the stairs 50, 60 are fixed in a predetermined position on the temporary scaffolding 10, the upper surface of the step portions 52 is configured to be horizontal.

[0040] A locked portion 65 is provided at the tip of the rotating portion 64. The locked portion 65 is bent in an L-shape relative to the base main body 62, and includes a wedge-shaped protrusion 66 that can be inserted (press-fitted) into the receiving portions 23A to 23D.

[0041] Here, the second step 10B is considered as the predetermined step. In this case, in the predetermined step (second step 10B), a plurality of first steps 40A and one or more (one in the example of FIG. 1) second steps 40B are aligned in the longitudinal direction and supported by a plurality of brackets 30 (support members) arranged in the predetermined step (second step 10B). In the plurality of steps 40 aligned in the longitudinal direction in the predetermined step (second step 10B), the second steps 40B are arranged closer to one widthwise side (the building side in FIG. 1) of the plurality of first steps 40A aligned in the longitudinal direction, and the plurality of first steps 40A are provided in a configuration in which they protrude further in the widthwise other side (the opposite side to the building in FIG. 1) than the second steps 40B. Even on a step (first step 10A) lower than a predetermined step (second step 10B), a plurality of first steps 40A and one or more (one in the example of FIG. 1) second steps 40B are lined up in the longitudinal direction and supported by a plurality of brackets 30 (support members) arranged on the lower step (first step 10A). The plurality of steps 40 lined up in the longitudinal direction on the lower step (first step 10A) are arranged such that the second steps 40B are arranged closer to one widthwise side of the plurality of first steps 40A lined up in the longitudinal direction, and the plurality of first steps 40A are provided so as to protrude further to the other widthwise side than the second steps 40B.

[0042] The first side area, which is the side area on the other widthwise side of the second step 40B on a specified step (second step 10B) (in the example of Figure 1, the area on the opposite side of the second step 40B from the building side), is an area where no step 40 is arranged. A concave portion is formed by the end portion (edge ​​portion extending in the longitudinal direction of the second step 40B) on the other side of the width of the second step 40B on the specified step (second step 10B), the end portion (edge ​​portion extending in the longitudinal direction of the first step 40A) on the other side of the length of the first step 40A adjacent to the other side of the length of the second step 40B on the other side of the length of the second step 40B on the other side of the length of the first step 40A ...

[0043] The second side area, which is the side area on the other widthwise side of the second step 40B on the above-mentioned lower step (first step 10A) (in the example of Figure 1, the area on the opposite side to the building from the second step 40B), is an area where no step 40 is arranged. The end of the second step 40B on the lower step (first step 10A) on the other side in the width direction (the edge extending in the longitudinal direction of the second step 40B), the end of the first step 40A on the other side in the length direction adjacent to the second step 40B on one side in the length direction (the edge extending in the width direction of the first step 40A), and the end of the first step 40A on one side in the length direction adjacent to the second step 40B on the other side in the length direction (the edge extending in the width direction of the first step 40A) form a recessed portion recessed toward one side in the width direction, and most of the area inside the recessed portion is a space where no objects exist and is a space where people can pass through. The staircase 50 is arranged to pass through the space (the space in the second side area).

[0044] The staircase 50 is provided so as to straddle the side area (the first side area) on the other side of the width direction of the second step 40B on the predetermined step (second step 10B) and the side area (the second side area) on the other side of the width direction of the second step 40B on the lower step (first step 10A). The upper surface of the first step 40A is configured as a single, integral plate. The upper surface of the second step 40B is configured as a single, integral plate. The upper surface of the first step 40A may be a plate-like body without holes, a plate-like body with holes, a net-like plate-like body, or other plate-like structure. The upper surface of the second step 40B may be a plate-like body without holes, a plate-like body with holes, a net-like plate-like body, or other plate-like structure. The width of the step portion 52 of the staircase 50 is smaller than the width of the first step 40A. Specifically, the maximum width of each step portion 52 in the staircase 50 (the width of the widest portion of each step portion 52) is smaller than the maximum width (the second width) of the second tread 40B. In the example of Fig. 1, the staircase 50 is provided on one side in the width direction (the building side) of the multiple support portions 20 lined up in the horizontal direction, and the staircase 50 is provided between the second tread portion 40B and the support portions 20 in the width direction.

[0045] Next, the assembly of the temporary scaffolding 10 will be described. As shown in FIG. 1, while arranging a plurality of support parts 20 in a row, the wedge part 32 is pressed into the receiving part 23C corresponding to the step 40 of the first step (first layer) 10A, and the plurality of brackets 30 are fixed to the support parts 20. Next, the plurality of first step parts 40A of the first step (first layer) 10A and one second step 40B are bridged between the brackets 30 at a predetermined position. Then, using the recessed space on the side of the second step 40B, the protrusion 66 of the upper locked part 65 of the staircase 60 is struck from above with a hammer or the like to press it into the corresponding receiving part 23B near the bracket 30, and the protrusion 66 of the lower locked part 65 of the staircase 60 is struck from above with a hammer or the like to press it into the corresponding receiving part 23D on the lower side of the adjacent support part 20, so that the staircase 60 is bridged diagonally (see FIG. 5 and FIG. 6).

[0046] Next, as shown in Fig. 1, the wedge portion 32 of the bracket 30 is press-fitted into the receiving portion 23C corresponding to the tread 40 of the second step (second layer) 10B to fix the brackets 30 to the support 20, and the first tread 40A and the second tread 40B of the second step (second layer) 10B are bridged between the brackets 30 in predetermined positions. Then, by utilizing the recessed space on the side of the second tread 40B, the upper locked portion 53 of the staircase 50 is locked to the bracket 30, and the lower locked portion 53 of the staircase 50 is locked to the lower bracket 30 of the adjacent support 20, so that the staircase 50 is bridged diagonally (see Figs. 2 and 4).

[0047] Next, the wedge portions 32 of the brackets 30 are press-fitted into the receiving portions 23A-23D corresponding to the treads 40 of the third layer 10C to fix the brackets 30 to the support 20, and the first tread 40A and the second tread 40B of the third layer 10C are bridged between the brackets 30 in predetermined positions. Then, using the recessed space on the side of the second tread 40B, the upper locked portion 53 of the stairs 50 is locked to the bracket 30, and the lower locked portion 53 of the stairs 50 is locked to the lower bracket 30 of the adjacent support 20, so that the stairs 50 are bridged diagonally. This completes the assembly of the temporary scaffolding 10.

[0048] According to the above embodiment, the following actions and effects are achieved. According to the above embodiment, the stairs 50, 60 that allow people to ascend and descend between a position lower than the second step 40B are provided in the area to the side of the second step 40B, which has a smaller width dimension than the first step 40A. As a result, even if there is not enough space to install the temporary scaffolding 10 with the stairs 50, 60, the stairs 50, 60 can be installed using the space to the side of the second step 40B, making it easy to move to steps 40 of different heights.

[0049] In addition, the stairs 50, 60 include a base 51, step portions 52 provided at predetermined intervals on the base 51 for people to walk on when ascending or descending, and engaging portions 53, 65 arranged on at least one end side of the base 51 and engaged with at least one of the support member and the support portion 20. In this way, the stairs 50, 60 for people to ascend and descend can be formed with a simple structure.

[0050] The support member is a bracket 30 fixed to the support portion 20, the bracket 30 having a rod-shaped horizontal support portion 31 having a horizontal axis, and the staircase 50 has a pair of engaged portions 53, 53 that are engaged with the horizontal support portion 31. Even in the case of a one-sided scaffold using the bracket 30, the pair of engaged portions 53, 53 are engaged with the bracket 30, so that the staircase 50 can be held in a stable position.

[0051] The support column 20 has receiving portions 23A to 23D at positions at a predetermined height, and the locked portion 65 is locked to the support column 20 by being inserted into the receiving portions 23A to 23D. In this way, for example, the entire width of the bracket 30 can be used to hold the second step board 40B, making it possible to increase the dimension of the second step board 40B in the width direction.

[0052] Further, the locked portion 65 is rotatably connected to the end portion of the base portion 61 . In this way, the position of the locked portion 65 can be easily moved relative to the base portion 61, improving the degree of freedom in selecting the location where the stairs 60 are installed.

[0053] The base 61 also has a base body 62 and an expandable portion 63 whose length can be changed relative to the base body 62 . In this way, the length of the staircase 60 can be changed by the extension portion 63 of the base 61, so that even if the position of the receiving portions 23A-23D to which the interlocking portion 65 of the staircase 60 is engaged is changed, the staircase 60 can be installed by engaging the interlocking portion 65 with the receiving portions 23A-23D in a different position.

[0054] Further, the width of the second step board 40B is at least half the width of the first step board 40A. In this way, the dimensions of the second step 40B can be secured so that people can walk on it without any problems, while a space can be secured to the side of the second step 40B for installing the stairs 50, 60.

[0055] <Embodiment 2> Next, a second embodiment will be described with reference to FIGS. In the second embodiment, a staircase 70 is used instead of the staircases 50 and 60. Other configurations are similar to those in the first embodiment, so the same configurations are given the same reference numerals and the description thereof will be omitted.

[0056] As shown in FIGS. 7 and 8, the staircase 70 includes a base portion 71, a step portion 52, and a locked portion 75. The base 71 includes a rod-shaped base body 72 extending linearly, and an expandable / contractable section 73 coaxially connected to the base body 72. The cross-sectional outer shape of the base body 72 can be any shape, such as a circle, an oval, or a rectangle. The expandable section 73 has a smaller diameter than the outer diameter of the base body 72 and can be inserted inside the base body 72, so that the entire length of the base 71 can be expanded or contracted. Although the base 71 is linear, the shape is not limited thereto and may be curved. For example, the base may be curved over its entire length.

[0057] The locked portion 75 has an alignment protrusion 76 and a protrusion 77, both of which protrude in a tapered shape. The alignment protrusion 76 abuts against the outer surface of the receiving portion 23B, 23D. The protrusion 77 is pressed into the receiving portion 23B, 23D by hitting the alignment protrusion 76 from above with a hammer or the like while the alignment protrusion 76 abuts against the outer surface of the receiving portion 23B, 23D. In addition, handrails 15 may not be provided on the sides of the stairs 70 to prevent interference.

[0058] <Other embodiments> The technology described in this specification is not limited to the embodiments described in the above description and drawings, and for example, the following embodiments are also included in the technical scope of the technology described in this specification.

[0059] (1) In the above embodiment, the temporary scaffolding is a one-sided scaffolding, but is not limited thereto. For example, a two-sided scaffolding may be provided with two rows of support pillars 20, a pair of support pillars 20 are connected with a horizontal cross member (beam) between them, and a tread 40 is placed across the adjacent cross members. In addition, the scaffolding is not limited to a wedge-tightening type scaffolding, and a frame scaffolding, a single-pipe scaffolding, a cantilever scaffolding, or the like may be used. In addition, a brace erected diagonally intersecting the multiple support pillars 20, or a wall tie abutting or connected to the building B may be provided.

[0060] (2) The number of support columns 20 and the number of layers of the treads 40 are not limited to those in the above embodiment, and can be changed as appropriate according to the size of the building and the shape of the site. The number of stairs can also be changed as appropriate. For example, the treads 40 may be made into a single layer.

[0061] (3) Although one staircase is provided for one single step 40, this is not limited thereto, and multiple staircases may be provided for one single step 40. (4) The types of stairs may be the same for all of a single scaffold, or multiple types of stairs may be used in any combination for a single scaffold.

[0062] (5) Although the receiving portions 23A to 23D are fixed integrally to the support portion 20, this is not limiting. For example, an adapter provided with a receiving portion separate from the support portion may be attached to the support portion. (6) Although the receiving portions 23A to 23D have the through holes 24, this is not limited to the above. For example, instead of the through holes 24, recesses that are recessed on the upper surface side may be formed, and the recesses may receive the protrusions (not limited to by press-fitting). [Explanation of symbols]

[0063] 10: Temporary scaffolding 20: Support section 23: Receiving parts 23A~23D: Receiving part 24: Through hole 30: Bracket (support member) 31: Horizontal support part 32: Wedge 40: Treadboard 40A: First step 40B: Second step 41: Tread body 42: Locking holding part 50,60,70: stairs 51,61,71: base 51A: Rod-shaped part 51B: Branch 52: Step section 53,65,75: Locked part 62,72: Base body 63,73: Telescopic part 64: Rotating part 66,77: protrusion 75: Locked part 76: Alignment protrusion B: Building

Claims

1. A plurality of steps on which a person can walk; A plurality of support members supporting a plurality of the treads; A temporary scaffolding including a plurality of support poles extending upward from the ground and to which each of the support members is fixed, The plurality of step boards include a first step board having a longitudinal shape, and a second step board having a width dimension smaller than that of the first step board, the second step board being arranged in line with the longitudinal direction of the first step board, A staircase is provided in a region to the side of the second step, allowing people to ascend and descend to a position lower than the second step. Temporary scaffolding.

2. The staircase is A base and A plurality of step portions provided at predetermined intervals on the base portion for people to walk on when ascending or descending; a locking portion disposed on at least one end side of the base portion and locked to at least one of the support member and the support column; Equipped 2. The temporary scaffolding according to claim 1.

3. The support member is a bracket fixed to the support column, The bracket includes a horizontal support portion extending along a horizontal direction, The staircase includes a pair of the engagement parts that are engaged with the horizontal support part. Temporary scaffolding according to claim 2.

4. The support portion has a receiving portion that receives the engaged portion at a predetermined height. Temporary scaffolding according to claim 2.

5. The receiving portion has a through hole formed therein, The locked portion is press-fitted into the through hole.

5. The temporary scaffolding according to claim 4.

6. The locked portion is rotatably connected to the base portion. Temporary scaffolding according to claim 2.

7. The base portion has a base body and an expandable portion whose length can be changed relative to the base body.

5. The temporary scaffolding according to claim 4.

8. In a predetermined step, a plurality of the first step boards and one or more of the second step boards are aligned in the longitudinal direction and supported by a plurality of the support members arranged in the predetermined step, The plurality of step boards arranged in the longitudinal direction on the predetermined step are arranged so that the second step boards are arranged closer to one widthwise side of the plurality of first step boards arranged in the longitudinal direction, and the plurality of first step boards are provided so as to protrude further to the other widthwise side than the second step boards, At a step lower than the predetermined step, a plurality of the first step boards and one or more of the second step boards are aligned in the longitudinal direction and supported by a plurality of the support members arranged at the lower step, The plurality of step boards arranged in the longitudinal direction on the lower step are arranged so that the second step boards are arranged closer to one widthwise side of the plurality of first step boards arranged in the longitudinal direction, and the plurality of first step boards are provided so as to protrude further to the other widthwise side than the second step boards, A side region on the other side of the second step in the width direction in the predetermined step is a region in which the step is not disposed, A side region on the other side of the second step in the width direction of the lower step is a region in which the step is not arranged, The staircase is provided so as to span a side area on the other side of the width direction of the second tread at the predetermined step and a side area on the other side of the width direction of the second tread at the lower step, The upper surface of the first step is formed as a single, integral plate, The upper surface of the second tread is formed as a single, integral plate, The width of the step portion of the staircase is smaller than the width of the first tread.

8. A temporary scaffolding according to any one of claims 1 to 7.

9. A staircase for temporary scaffolding comprising a plurality of treads, each of which has a longitudinal first tread and a longitudinal second tread arranged in line in the longitudinal direction of the first tread and has a smaller width dimension than the first tread, a plurality of support members supporting the plurality of treads, and a plurality of support columns to which each of the support members is fixed, the staircase being capable of ascending and descending in an inclined direction with respect to the plurality of treads, A staircase for temporary scaffolding is arranged in a region to the side of the second tread.

Images