The opening of the stage is folded by hand.

Abstract

To provide a handrail frame for a stair opening capable of enhancing safety in a simple configuration while preventing a field worker walking on a scaffold from falling down.SOLUTION: A handrail frame 1 for a stair opening of the present invention is used for a prefabricated scaffold in which a plurality of building frames 4 is erected, and is installed around an opening 3 formed by hooking a temporary scaffold stair 2 on a connecting horizontal member 7 of any building frame 4. A first frame member 21, which has a cloth material 15 and a body part 16 formed into a frame shape by multiple frame members and is provided on the opposite side of a hatchway of the temporary scaffold stair 2, is provided with a gable side handrail material 26 extending in the horizontal direction and connected to a leg post 6 of the erection frame 4. A gable side middle rail 40 extending in the horizontal direction from the first frame member 21 and connected to the leg post 6 of the erection frame 4 is provided below the gable side handrail material 26. The gable side middle rail 40 is formed into a substantially L shape with a bent part curved along the periphery of the opening 3.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a handrail frame for a stair opening, which is used for temporary scaffolding assembled at a construction site or the like and is installed near an opening created by a staircase for the temporary scaffolding. [Background technology]

[0002] Conventionally, at construction sites where extensions, renovations, or repair work (painting, tiling, waterproofing repairs, crack repairs, etc.) of apartment buildings and other structures is carried out, temporary scaffolding is erected around the building to allow on-site workers to work at heights.

[0003] FIG. 8 is a schematic perspective view showing the configuration of a conventional temporary scaffolding, particularly a frame scaffolding (see, for example, Patent Document 1). According to this diagram, in the frame scaffolding, a torii-shaped building frame 60 is installed, and a floor-attached fabric frame 62 is hung between connecting horizontal members 61 of the building frame 60, which are arranged horizontally. The floor-attached fabric frames 62 are arranged side by side horizontally and also arranged vertically, thereby constructing multiple layers. Then, temporary scaffolding stairs 63 (hereinafter referred to as "stairs 63") are installed between the different layers so that on-site workers can move between the different layers.

[0004] In frame scaffolding, stairs 63 are installed diagonally, which creates an opening 64 on the floor where the stairs are installed. Therefore, when a site worker walks on the scaffolding on that floor, there is a risk of falling downward through the opening 64. Therefore, a handrail frame 65 for a stair opening (hereinafter referred to as "handrail frame 65") is usually installed near the opening 64.

[0005] The handrail frame 65 has a fabric material 66 with gripping metal fittings on both ends, and is provided with a plurality of frame members 67 extending vertically from the fabric material 66, and two handrail members 68 extending horizontally. The frame member 67 provided on the opposite side of the staircase 63 from the entrance is provided with an end-side handrail frame 69 to prevent site workers from falling from the end side of the opening 64.

[0006] In this case, the building frame 60 has a pair of reinforcing steel members 71 formed along the vertically extending pedestals 70, so when the handrail frame 65 is installed, the end-side handrail frame 69 blocks the passage. For this reason, in frame scaffolding, the end-side handrail frame 69 needs to be installed at an angle in plan view, as shown in Figures 8 and 9 (note that the floor-mounted fabric frame 62 and stairs 63 are omitted in Figure 9).

[0007] However, when the end-side handrail frame 69 is installed at an angle, an opening 72 that is roughly triangular in plan view is created below the end-side handrail frame 69 (see Figure 9). This poses a safety problem, as there is a risk that on-site workers may fall downward through the opening 72 when walking on the scaffolding. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-265743 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention was conceived in light of the above-mentioned circumstances, and its object is to provide a handrail frame for a staircase opening that can increase safety with a simple structure and prevents on-site workers from falling downward when walking on the scaffolding. [Means for solving the problem]

[0010] The handrail frame for a stair opening provided by the present invention is used in a frame scaffolding on which a plurality of building frames are erected, and is installed in the vicinity of an opening formed by hanging temporary scaffolding stairs on the connecting horizontal members of any of the building frames, and comprises a fabric material having gripping members at both ends and stretched between the connecting horizontal member and another connecting horizontal member arranged opposite it, and a main body portion formed in a frame shape by a plurality of frame members on top of the fabric material, and the frame member arranged on the opposite side of the temporary scaffolding stairs from the entrance is provided with an end-side handrail member extending horizontally from its top and connected to a pedestal of the building frame, the end-side handrail member being formed in a straight line and arranged diagonally with respect to the end-side direction in a plan view, and an end-side middle member extending horizontally from the frame member and connected to the pedestal of the building frame below the end-side handrail member is provided and is provided with an L-shaped portion formed in a substantially L-shape, a slide portion that is movable back and forth in the same direction as the L-shaped portion, and a clamp portion that is rotatable in the axial direction of the slide portion and that grips the leg posts of the building frame, and the base end side of the L-shaped portion is supported by the frame member that extends horizontally so as to be movable back and forth and rotatable in the axial direction, and a hook portion is provided between the slide portion and the clamp portion to hook onto the gripping member of the fabric material when the handrail frame is packed. It is characterized by being

[0013] In the handrail frame for a staircase opening of the present invention, the end-side handrail material preferably comprises a pipe-shaped section that is rotatable in the axial direction of the frame member extending in the vertical direction, a handrail material slide section that is movable forward and backward in the same direction as the pipe-shaped section, and a handrail material clamp section that is rotatable in the axial direction of the handrail material slide section and is used to grip the leg post of the building frame. [Effects of the Invention]

[0014] According to the present invention, a handrail frame for a stair opening, which is installed near an opening created by a temporary scaffolding staircase, has an end-side handrail material and an end-side center pole, and the end-side center pole is formed in a generally L-shape with a curved bend along the periphery of the opening, so that it protrudes near the feet of a site worker walking on the scaffolding. This minimizes the possibility of the site worker stepping into the opening and prevents the site worker from falling through the opening. Thus, a highly safe handrail frame for a stair opening can be provided. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic perspective view of a handrail frame for a stair opening according to the present invention; [Figure 2] FIG. 2 is a schematic front view of the handrail frame for a stair opening shown in FIG. [Figure 3] FIG. 2 is a schematic plan view of the handrail frame for a stair opening shown in FIG. [Figure 4] This is a schematic perspective view of the gable side handrail material. [Figure 5] This is a schematic perspective view of the wife's side. [Figure 6] FIG. 10 is a schematic front view showing the packaged state of the handrail frame for a stair opening. [Figure 7] FIG. 10 is a schematic plan view showing the packaged state of the handrail frame for a stair opening. [Figure 8] FIG. 1 is a perspective view showing the installation state of a conventional handrail frame for a stair opening. [Figure 9] FIG. 9 is a plan view showing the attached state of the handrail frame for a stair opening shown in FIG. 8. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0017] Fig. 1 is a schematic perspective view showing a handrail frame for a stair opening according to the present invention, showing an example of a state in which it is installed in a frame scaffolding, which is a temporary scaffolding. Fig. 2 is a schematic front view of the handrail frame for a stair opening shown in Fig. 1, and Fig. 3 is a schematic plan view of the same. Note that Fig. 1 omits the front diagonal braces attached between the building frames, Fig. 2 omits the front floor fabric frame, and Fig. 3 omits the building frames and temporary scaffolding stairs, etc.

[0018] The handrail frame 1 for a stair opening (hereinafter referred to as "handrail frame 1") according to this embodiment is mainly used in frame scaffolding at, for example, a construction site, and is intended to prevent on-site workers from falling downward through an opening 3 created by the installation of temporary scaffolding stairs 2 (hereinafter referred to as "stairs 2"). The stairs 2 are used by on-site workers to ascend and descend between the upper and lower levels of the frame scaffolding.

[0019] As shown in Figure 1, the frame scaffolding is roughly composed of a number of building frames 4 erected at predetermined intervals in the vertical and horizontal directions, and a number of floor-attached cloth frames 5 provided between the building frames 4. On-site workers can move within the frame scaffolding by walking on these floor-attached cloth frames 5.

[0020] Each building frame 4 is formed in a so-called gate shape and is composed of a pair of pillars 6 extending vertically, a connecting horizontal member 7 extending horizontally and connecting the tops of the pillars 6, and a pair of stiffeners 8 extending parallel to the pillars 6 on the inside of both pillars 6 to reinforce the building frame 4. As shown in Figure 1, a number of diagonal braces 9 are attached to the pillars 6 of adjacent building frames 4.

[0021] The staircase 2 is placed between successive layers, for example, between the ground and the second layer of temporary scaffolding, or between the second and third layers. The staircase 2 is generally composed of a plurality of tread members 11 and a pair of support members 12 for supporting the tread members 11 from the left and right. The plurality of tread members 11 are arranged in parallel at equal intervals with their tread surfaces aligned substantially horizontally. A gripping member 13 is connected to each end (the lower end is not shown) of the pair of support members 12. The gripping member 13 is hooked onto the connecting horizontal member 7 of the building frame 4.

[0022] The handrail frame 1 is positioned near the opening 3 created by the staircase 2, and is roughly composed of a long fabric material 15 and a frame-shaped main body 16 arranged above the fabric material 15.

[0023] As shown in Figure 2, the fabric material 15 is provided with gripping fittings 17 on both ends. Each gripping fitting 17 is hooked onto the connecting horizontal members 7 of the building frame 4. Each gripping fitting 17 is movable forward and backward relative to the main body of the fabric material 15, which allows the handrail frame 1 to be positioned to match the length of the floor-mounted fabric frames 5 that are arranged in parallel in the longitudinal direction.

[0024] The main body 16 is formed in a frame shape by a first frame member 21 that is located on the opposite side of the entrance to the staircase 2 and extends upward from the fabric material 15, a second frame member 22 that is connected near the center of the first frame member 21 and extends horizontally, a third frame member 23 that extends upward from the fabric material 15, curves midway, and extends horizontally and is connected to the top of the first frame member 21, and a fourth frame member 24 that connects the second frame member 22 and the third frame member 23 that extend horizontally and extends vertically.

[0025] An end-side handrail member 26 is provided on the top of the first frame member 21, and is supported so as to be rotatable in the horizontal direction relative to the main body 16 of the handrail frame 1. The end-side handrail member 26 connects the main body 16 of the handrail frame 1 with the pedestal 6 of the building frame 4, and is provided particularly on the end-side to prevent site workers from falling from the opening 3. The end-side handrail member 26 is shown in Figs. 3 As shown in Fig. 1, the windows are arranged diagonally with respect to the gable side in plan view.

[0026] As shown in Figure 2, the end-side handrail material 26 has a cylindrical base 27 that is supported at the top of the first frame member 21 so as to be rotatable in its axial direction. A pipe-shaped portion 28 is provided on the cylindrical base 27 and extends horizontally from it. As shown in Figures 3 and 4, a first slide portion 29 is fitted to the tip of the pipe-shaped portion 28, and is movable back and forth in the same direction as the pipe-shaped portion 28. When the end-side handrail material 26 is attached to the pedestal 6 of the building frame 4, the first slide portion 29 is fixed to the pipe-shaped portion 28 by a first fixing bracket 30 consisting of a butterfly bolt provided at the bottom of the tip of the pipe-shaped portion 28.

[0027] A cylindrical first rotating part 31 that is rotatable in the axial direction is provided at the tip of the first sliding part 29. The first rotating part 31 can be fixed to the first sliding part 29 by a first lock pin 32 provided on its side. A rod-shaped extending part 33 that extends in a predetermined direction (upward in FIG. 4 ) is provided at the tip of the first rotating part 31, and a first clamping part 34 is provided at the tip of the extending part 33. The first clamping part 34 is made up of a substantially cylindrical first supporting part 35 that is rotatably supported by the extending part 33, and a first gripping part 36 that is connected to the first supporting part 35 and has a substantially U-shaped cross section. The first clamping part 34 is used to grip the pier 6 of the building frame 4.

[0028] The tip of the first slide part 29 is exposed to the outside, and a support piece 37 is fixed to the lower tip of the first slide part 29. The support piece 37 abuts against the pedestal 6 when a worker on site grips the first clamp part 34 to the pedestal 6 of the building frame 4, and is provided so that the worker on site can work stably.

[0029] Additionally, an end-side intermediate rod 40 is provided at the tip of the second frame member 22 of the main body 16 on the first frame member 21 side. Like the end-side handrail member 26, the end-side intermediate rod 40 connects the main body 16 of the handrail frame 1 to the pedestal 6 of the building frame 4, while also preventing site workers from falling through the opening 3 on the end side. In particular, as shown in Figures 1 and 3, the end-side intermediate rod 40 has a generally L-shaped overall shape that follows the periphery of the opening 3 and protrudes from the opening 3 in the direction of the floor-mounted fabric frame 5 (details will be described later).

[0030] The gable-side middle member 40 has an L-shaped portion 41 that is bent midway along its body and curved at the bent portion to form a generally L-shaped overall shape in a plan view. The L-shaped portion 41 is supported at its base end side so as to be movable back and forth relative to the second frame member 22 and rotatable in its axial direction. The L-shaped portion 41 can be fixed to the second frame member 22 by a second lock pin 42 provided at the top of the tip of the second frame member 22.

[0031] More specifically, when the gable side middle member 40 is attached to the pedestal 6 of the building frame 4, the base end portion of the L-shaped portion 41 is arranged parallel to the fabric material 15 at a predetermined distance in the height direction, and the portion from the bent portion onwards is arranged parallel to the connecting horizontal member 7 of the building frame 4 at a predetermined distance in the height direction.

[0032] Therefore, the end-side middle section 40 protrudes from the end-side handrail material 26 below the end-side handrail material 26 from the opening 3 in the direction of the floor-mounted cloth frame 5, thereby preventing on-site workers from falling, particularly from the approximately triangular opening of the opening 3 (equivalent to the conventional opening 72).

[0033] 3 and 5, a second slide portion 43 is provided at the tip of the L-shaped portion 41, and is movable back and forth in the same direction as the L-shaped portion 41. The second slide portion 43 is fixed to the L-shaped portion 41 by a second fixing bracket 44 made of a butterfly bolt provided at the bottom of the tip of the L-shaped portion 41.

[0034] A substantially cylindrical second rotating part 45 for connecting a second clamp part 49 (described later) is provided at the tip of the second sliding part 43. The second rotating part 45 can be fixed to the second sliding part 43 by a third lock pin 46 provided on the side surface thereof.

[0035] A substantially rectangular parallelepiped-shaped hooking portion 47 is provided on the side opposite the second rotating portion 45. The hooking portion 47 is hooked onto the gripping metal fitting 17 of the fabric material 15 when packing the handrail frame 1, etc. (details will be described later), and is used to secure the gable-side middle section 40. A recess 48 is formed in the center of the tip of the hooking portion 47, and this recess 48 allows it to be hooked onto the gripping metal fitting 17. The hooking portion 47 is rotatable in the direction from the side of the second rotating portion 45 toward its axis.

[0036] The hooking portion 47 is provided with a second clamping portion 49 having a U-shaped cross section. The second clamping portion 49 is made up of a second support portion 50 having a substantially cylindrical shape that is rotatably supported on the hooking portion 47, and a second gripping portion 51 having a substantially U-shaped cross section that is connected to the second support portion 50. The second clamping portion 49 is for gripping the stud 6 of the building frame 4 below the portion of the stud 6 that is gripped by the first clamping portion 34 of the end-side handrail material 26.

[0037] In the above configuration, when the handrail frame 1 is attached near the opening 3, the gripping fittings 17 on both ends of the fabric material 15 are hooked onto the connecting horizontal members 7 of the building frame 4. Next, the end-side handrail material 26 is attached to the stud 6 of the building frame 4. That is, the first sliding portion 29 is advanced or retreated relative to the pipe-shaped portion 28 according to the distance between the main body 16 and the stud 6 of the building frame 4, and with the support piece 35 abutting against the stud 6, the first sliding portion 29 is fixed to the pipe-shaped portion 28 by the first fixing fitting 30, thereby determining the position of the end-side handrail material 26 relative to the stud 6. Thereafter, the first clamp portion 34 is gripped by the stud 6, and the end-side handrail material 26 is connected to the stud 6.

[0038] The end-side clamp 40 is then attached to the stud 6 of the building frame 4. That is, the L-shaped portion 41 is advanced or retracted relative to the second frame member 22 in accordance with the relative positions of the second frame member 22 of the main body 16 and the stud 6 of the building frame 4, and with the second clamp portion 49 abutting the stud 6, the L-shaped portion 41 is fixed to the second frame member 22 by the second lock pin 42, thereby determining the position of the end-side clamp 40 relative to the stud 6. The second clamp portion 49 is then gripped by the stud 6, connecting the end-side clamp 40 to the stud 6. The end-side clamp 40 may be attached to the stud 6 of the building frame 4 before the end-side handrail material 26.

[0039] In this way, when the handrail frame 1 is attached near the opening 3, the generally L-shaped end-side intermediate frame 40 protrudes from the opening 3 in the direction of the floor-mounted fabric frame 5 so as to follow the periphery of the opening 3 in a plan view. As a result, the generally triangular opening 72 (see FIG. 9) in a plan view that was created in the conventional configuration is blocked in a plan view (see FIG. 3). In this case, the end-side intermediate frame 40 protrudes near the feet of the site worker, minimizing the possibility of the site worker stepping into the opening 3. This makes it possible to prevent the site worker from falling from the opening 3, and provides a highly safe handrail frame 1.

[0040] Next, the manner in which the handrail frame 1 is packed and transported will be described.

[0041] It is desirable for such handrail frames to have a more compact shape when they are packed or transported, and for this reason, in this handrail frame 1, as will be described later, the end-side handrail material 26 is rotated toward the main body 16 and the end-side middle member 40 is rotated toward the fabric material 15 so that it becomes approximately linear in plan view.

[0042] That is, in the end-side handrail material 26, the second lock pin 32 is released, and the second rotating part 31 is rotated so that the extension part 33 faces downward, as shown in Figure 6 (see arrow A). In this case, the first clamp part 34 is displaced from above to below in accordance with the extension part 33.

[0043] Next, the first fixing bracket 30 is loosened to advance or retract the first slide portion 29 (see arrow B), and the cylindrical base portion 27 is rotated approximately 180° around the first frame member 21 (see arrow C). Then, the support piece 37 of the first slide portion 29 is brought into contact with the fourth frame member 24 to adjust the overall length of the end-side handrail material 26. After that, the first clamp portion 34 is gripped by the fourth frame member 24. In this way, the end-side handrail material 26 becomes hidden inside the main body portion 16 of the handrail frame 1, as shown in Figure 7.

[0044] Meanwhile, at the wife's side, the second lock pin 42 is released and the L-shaped portion 41 is rotated approximately 90° relative to the second frame member 22 (see arrow D), and the L-shaped portion 41 is advanced to a certain extent from the second frame member 22 (see arrow E).

[0045] Next, the second fixing metal fitting 44 is loosened to retract the second sliding portion 43 toward the L-shaped portion 41 (see arrow F), and the hooking portion 47 and the second clamp portion 49 are rotated approximately 90° so that the recessed portion 48 of the hooking portion 47 faces downward. Then, the L-shaped portion 41 is displaced toward the main body portion 16 (see arrow G) so that the recessed portion 48 of the hooking portion 47 fits into the gripping metal fitting 17 of the fabric material 15. In this way, the extension direction of the end-side middle member 40 faces downward from the horizontal, and it can be made linear with respect to the main body portion 16 of the handrail frame 1, as shown in Figure 7.

[0046] As described above, when packing or transporting the handrail frame 1, if the end-side handrail frame 26 faces the main body 16 and the end-side middle frame 40 faces downward as shown in Fig. 6, the entire handrail frame 1 can be made approximately linear in plan view as shown in Fig. 7. Therefore, when packing or transporting multiple handrail frames 1, they can be stacked in a small space, allowing for reduction in the space required for packing.

[0047] The scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above embodiment, the end-side handrail material 26 was formed in a straight line, but it may be formed in a substantially L-shape similar to the end-side middle section 40. Furthermore, the end-side handrail material, end-side middle section, main body, fabric material, etc. are not limited to the shapes, sizes, quantities, and positional relationships of the above-described embodiment. [Explanation of symbols]

[0048] 1 Handrail frame for stair opening 2 Temporary scaffolding stairs 3 Opening 4 Building frame 5 Fabric frame with floor 6 pillars 7 Connecting horizontal member 15 Fabric materials 16 Main body (handrail frame for stair opening) 21 First frame member 22 Second frame member 23 Third frame member 26 Gable handrail 28 Pipe-shaped section 29 First slide part 36 First clamp part 40 Wife's side Naka-san 41 L-shaped part 43 Second slide part 49 Second clamp part

Claims

1. A handrail frame for a stair opening is used for a frame scaffolding on which a plurality of building frames are erected, and a temporary scaffolding staircase is hung on the connecting horizontal member of any of the building frames, and is installed near the opening created thereby, a fabric material having gripping members at both ends and stretched between the connecting horizontal member and another connecting horizontal member disposed opposite the connecting horizontal member; a main body portion provided on an upper portion of the fabric material and formed into a frame shape by a plurality of frame members; The frame member provided on the opposite side of the entrance of the temporary scaffolding stairs has A gable-side handrail member is provided which extends horizontally from the top and is connected to the pedestal of the building frame, The gable side handrail material is It is formed in a straight line and is arranged diagonally with respect to the gable side in a plan view, A gable-side middle rail is provided below the gable-side handrail material, extending horizontally from the frame member and connected to the pedestal of the building frame, The wife, Naka-san, The bent portion is curved and formed in a substantially L-shape along the periphery of the opening, an L-shaped portion formed in a substantially L-shape; a slide portion that can move back and forth in the same direction as the L-shaped portion; a clamp portion that is rotatable in the axial direction of the slide portion and that grips the pedestal of the building frame, The base end side of the L-shaped portion is The frame member extends horizontally and is supported by the frame member so as to be movable back and forth and rotatable in the axial direction thereof. A handrail frame for a stair opening, characterized in that a hook portion is provided between the slide portion and the clamp portion for hooking onto the gripping member of the fabric material when the handrail frame is packed.

2. The gable side handrail material is a pipe-shaped portion provided on the frame member extending in the vertical direction so as to be rotatable in the axial direction thereof; A handrail slide portion that can move forward and backward in the same direction as the pipe-shaped portion; A handrail clamp portion that is rotatable in the axial direction of the handrail slide portion and that grips the pedestal of the building frame; The handrail frame for a stair opening according to claim 1, comprising:

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