JP2019027196A - Staircase opening handrail and temporary scaffold incorporating the same - Google Patents

Abstract

To provide a staircase opening handrail capable of keeping a gap between floor cloth frames narrow and not allowing beams of the staircase opening handrail to protrude above the floor surface, and a temporary scaffolding incorporating the stairway opening handrail.SOLUTION: A stairway opening handrail 32 includes beams 33 with clamp metal fittings 50 at both end portions that can hold cross beams or horizontal materials of a temporary scaffold in the longitudinal direction, and in the stairway opening handrail 32, at least the clamp metal fitting 50 which is on the side of the climb up and down entrance among the clamping metal fittings 50 is configured as an eccentric clamp metal fitting 53 having a step 55 in the width direction of the beam 33 in plan view.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a staircase opening handrail installed in a staircase opening portion of a temporary scaffold used indoors and outdoors in a construction site such as a construction site or a civil engineering site, and a temporary scaffold incorporating a staircase opening handrail.

  Temporary scaffolds at construction sites include frame scaffolds mainly used during construction of buildings, single pipe scaffolds mainly used during construction of houses, and wedge-tight scaffolds. Also called “supporting work”), a rolling tower, etc. is also an aspect of a temporary scaffold.

  Among these, the framework scaffold is a type that uses a building frame such as an H shape or a torii gate shape composed of vertical columns (also referred to as “construction material”) and horizontal rails (also referred to as “horizontal material”). In addition, the wedge-binding scaffold is a column member provided with a connecting piece such as a frame on the side surface and a short horizontal material (also called a “tie material”. In addition, the short horizontal material is sometimes referred to as “arm wood”. )), And a cloth frame with a floor (also referred to as “fabric board”) is bridged between the horizontal rails facing each other or between the horizontal members (arm wood). Used as a passageway.

  In addition, the system supporter arranges support columns in the vertical direction by connecting support members, such as frames, that are provided on the side surfaces in a vertical direction, and between the connection members of these support members, two types of horizontal materials are used. (It is also referred to as “tethering material. It may be the same length.)” Is a tightly bound structure formed by connecting in two horizontal directions, and a cloth frame with a floor is placed between facing horizontal materials (tethering material). It can be used as a work floor or a worker's aisle, etc., by appropriately spanning. Note that pipes made of steel or aluminum are often used for the column members, horizontal members, building frames, and the like.

  Here, as a connection metal fitting provided on the side surface of the column member, a plurality of frames provided on the side surface of the column member, a flange provided annularly on the side surface of the column member, or the like can be used. And the wedge metal fitting provided in the edge part of a horizontal member can be attached to connection metal fittings, such as a top and a flange, and can be fastened with a wedge.

  As described above, these temporary scaffolds are usually used as a working floor, a worker's passage, etc., with a cloth frame with a floor as a scaffolding plate.

  The cloth frame with a floor is generally composed of one or more long main members, a gripping metal attached to both ends in the longitudinal direction of the main members, and a U-shaped beam member. The main material consists of a horizontal flooring part and a cloth part formed by bending the side surfaces of both edges. A beam material having a U-shaped cross section is attached to both ends of the long main material, and gripping metal fittings are fixed to the four corners of both ends of the long main material with rivets or the like. In order to prevent an operator from sliding on the cloth frame with a floor when walking on the cloth frame with a floor, the upper surface of the floor material portion may be embossed. Moreover, in order to prevent a flooring part from bending in the width direction, a crosspiece may be provided under the center part of the flooring part.

  The floor-equipped cloth frame formed in this way is used as a scaffolding plate for a temporary scaffold by being bridged between facing horizontal rails or between horizontal members. At this time, according to the width of the work floor of the temporary scaffolding or the passage, one or two or more of the floor-attached cloth frames are arranged side by side to form a work floor or a passage.

  In the following, a frame scaffold and its assembling method will be described with reference to the drawings on behalf of a temporary scaffold.

  FIG. 1 shows an example of forming a frame scaffold using a torii-shaped building frame (hereinafter referred to as “torii frame”). (a) is a front view, (b) is a right side view.

  First, three torii frames 4 are arranged at equal intervals at right angles to the building 22, and a streak 13 is attached to the lock fitting 6 b on the opposite side of the building between the adjacent torii frames 4, and also on the building side By attaching the striation 13 to the lock fitting 6a and allowing the first-stage torii frame 4 to stand on its own, the first-stage scaffolding is formed. The connecting pin type hojo material 9 is fitted in the upper end of the vertical column 2 of the torii frame 4 in advance. Thereafter, a floor-mounted cloth frame 11 serving as a second-stage scaffolding plate is bridged between the horizontal rails 3 at the upper part of the first-stage adjacent torii frame 4, and then the first-stage torii frame 4 already erected. By mounting and fixing the lower part of the vertical column 2 of the torii frame 4 separately prepared on the vertical column 2 through a connecting pin type hojo material 9 fitted in the upper end of the column 2 in advance. Set up the torii frame 4 at the stage. Thereafter, in the same manner as the first stage, the streak 13 is attached to the lock fitting 6b on the opposite side of the building, and the streak 13 is also attached to the lock fitting 6a on the building side. The second stage scaffolding is formed by allowing the to stand independently. Thereafter, a floor-mounted cloth frame 11 serving as a third-stage scaffolding plate is bridged between the horizontal rails 3 on the upper side of the second-stage adjacent torii frame 4, and then the second-stage torii frame 4 already erected. By connecting the lower part of the vertical column 2 of the torii frame 4 separately prepared to the vertical column 2 via a connecting pin type hojo material 9 fitted in the upper end of the column 2 in advance. Frame 4 is erected. Thereafter, in the same manner as in the second stage, the streak 13 is attached to the lock fitting 6b on the opposite side of the building, and the streak 13 is also attached to the lock fitting 6a on the building side. A third-stage scaffolding is formed by allowing the to stand independently. In this way, the frame scaffold is formed until the required number of steps is reached. In addition, although the procedure which makes the frame of each step self-supporting by using a strut is described here, the frame of each step may be made self-supporting by replacing a part of the strut with a handrail frame.

  In this way, a temporary scaffold is formed, where a cloth frame with a floor is bridged between adjacent horizontal rails or between horizontal members so that workers can move in the horizontal direction in the temporary scaffold. That is, it is bridged between adjacent horizontal rails in the case of a building frame type scaffold, and between adjacent arm timbers in the case of a tight type scaffold. At this time, depending on the width of the work floor and the passage of the temporary scaffolding, that is, the length of the horizontal rail or the length of the arm lumber, the work floor or A passage is formed.

  In addition, the width of the cloth frame with a floor is usually used in two types of 240 mm width and 500 mm width, and they are referred to as a small anti (also referred to as a small cloth board) and a large anti (also referred to as a large cloth board), respectively. .

  In addition, the length of the horizontal beam and the length of the short horizontal material have an inch size and a meter size, but there are usually three types of inch sizes of 610 mm, 914 mm and 1219 mm, and the meter size. In general, three types of 600 mm, 900 mm, and 1200 mm are prepared.

  Therefore, normally, when installing a cloth frame with a floor as a work floor and a passage of a temporary scaffold, a large anti (500 mm width) is used to form a width of 600 to 610 mm, and 900 to 914 mm. To form a width, one large anti (500 mm width) and one small anti (240 mm width) are placed side by side, and two large antis (500 mm width) are formed to form a width of 1200 to 1219 mm. They will be placed side by side.

  Further, in the temporary scaffold, it is necessary to incorporate a staircase in the temporary scaffold so that the worker can assemble or disassemble the temporary scaffold or move in the vertical direction within the temporary scaffold. In this case, instead of bridging one or two cloth frames with floors on the upper scaffolding, by replacing the upper horizontal rail or horizontal material with a staircase member attached with a grab fitting that can be grabbed vertically. The staircase member can be incorporated obliquely between the upper horizontal beam or horizontal member and the lower horizontal beam or horizontal member.

  FIG. 2 shows two examples (plan view) when a staircase member is incorporated, taking a 900 to 914 mm wide frame scaffold as an example.

  As shown in FIGS. 2A and 2B, the staircase member 75 can be incorporated on either the road side or the building side. 2 (a) and 2 (b), the cloth frame 11 with a floor has a large anti 26 with a width of 500 mm and a small anti 25 with a width of 240 mm arranged in parallel in the horizontal direction. When it was spanned between the crosspieces 3 of the adjacent building frame, the small anti 25 remained as a passage as it was, and the staircase member 75 was incorporated in the place where the large anti 26 (500 mm width) was present. I understand that.

  Here, when the staircase member 75 is incorporated, the remaining small anti-layer 25 becomes a passage, but a staircase opening is formed in the scaffold at the upper stage of the staircase.

  Therefore, when the staircase member is incorporated, the remaining floor-attached cloth frame becomes a passage, but in this state, the floor-attached cloth frame is provided at the end opening on the non-lift door side of the staircase and the side opening of the staircase. There is a risk that the worker will fall.

  For this reason, as seen in Patent Documents 1 and 2, a staircase opening handrail is installed at the end opening on the non-lift door side of the staircase and the side opening of the stairway so that workers do not fall from the cloth frame with a floor. Is done. The staircase opening handrail will be described below by taking Patent Document 1 as an example.

  FIG. 3 is a front view showing an example of a staircase opening handrail proposed in Patent Document 1. As shown in FIG.

  The stairway opening handrail 32 has a frame-shaped handrail frame composed of a girder member 33 having gripping metal fittings 50 at both ends, two left and right support columns 34, an upper railing railing material 35, and a middle railing railing material 36, It consists of a rotating handrail material 39 that is rotatably mounted in the horizontal direction between the upper rail material 35 and the middle rail material 36, and has a vertical column fixing bracket 38 in the middle. Both are fixed perpendicular to the girders. Here, the frame-shaped handrail frame composed of the left and right support members 34, the upper rail material 35, and the middle rail material 36 is a worker from the side of the cloth frame 11 with a floor to the side opening of the staircase. The rotating handrail material 39 attached to the upper railing material 35 and the middle railing material 36 so as to be freely rotatable in the horizontal direction is provided with a non-stepped portion from the end of the cloth frame 11 with a floor. This prevents the worker from falling into the end opening on the elevator door side.

  FIG. 4 and FIG. 5 show an example when the stairway opening handrail is attached to a frame scaffolding made of a torii frame incorporating a staircase member. 4 is a plan view, and FIG. 5 is a left side view.

  A stairway opening is provided between the horizontal rails 3 of the adjacent torii frame by hooking the receiving holes of the gripping metal fittings 50 provided at both ends of the girder 33 of the staircase opening handrail 32 to the horizontal rails 3 of the adjacent torii frame. The partial handrail 32 can be installed in parallel with the cloth frame 11 with a floor. In addition, a drop lock is attached to the grip metal fitting 50, and it is possible to prevent the grip metal fitting 50 from being detached from the horizontal rail by hooking the receiving lock of the grip metal fitting 50 to the horizontal rail 3 and then applying the lock. . Then, the rotating handrail material 39 attached between the upper handrail material 35 and the middle handrail material 36 is rotated in the horizontal direction and pulled out, and the vertical column fixing bracket 38 provided in the middle of the rotating handrail material 39 is connected to the torii gate. Fix to the vertical column 2 of the frame.

  Here, the rotating handrail material 39 of the stairway opening handrail 32 is fixed at a right angle to a frame-shaped handrail frame composed of two left and right support members 34, an upper rail material 35, and a middle rail material 36. Rather than being fixed, it is fixed diagonally. This is because when a worker who has walked a passage made of a wide cloth frame with a floor reaches a portion where a staircase is installed, it is necessary to change the course to a passage made of a narrow cloth frame 11 with a floor. This is because it is necessary to secure the passage width as wide as possible.

  In this way, when the rotating handrail material 39 of the staircase opening handrail is obliquely fixed with respect to the frame-shaped handrail frame, a triangular gap 43 is formed at the end portion on the non-lift door side. Since there is a possibility that an operator will fall into the triangular gap 43 and fall down, and there is a possibility that the tool may fall to the lower stage from the triangular gap 43. A triangular gap plugging material (not shown) is installed on the triangular gap 43.

JP 2009-228334 A JP 2008-231853 A

  As shown in FIG. 4, when attaching the staircase opening handrail shown in Patent Document 1 to the frame scaffold incorporating the staircase member 75, the cloth frame 11 with the floor and the girder 33 of the stairway opening handrail 32 interfere with each other. Therefore, the installation position of the cloth frame with a floor (small anti) 11 installed in parallel with the staircase opening handrail 32 by the width of the girder 33 of the stairway opening handrail 32 is set in the horizontal direction (in FIG. 4). It is necessary to shift it downward. As a result, the installation position of the cloth frame with a floor (small anti) 11 ′ facing each other across the horizontal rail 3 is also shifted in the horizontal direction (downward in FIG. 4). Therefore, the gap 46 between the cloth frame with floor (small anti) 11 ′ and the cloth frame with floor (large anti) 11 ″ must be widened from about 20 mm to about 30 to 40 mm.

  However, there is a risk that an operator may fall into the gap formed between the floor-attached fabric frames and the tool may fall down from this gap. It is desired to make it as narrow as possible.

  In Patent Document 2, it is proposed that the gap generated between the floor-attached cloth frames can be narrowed by providing the claws holding metal fittings obliquely downward at both ends of the girder material of the staircase opening handrail. .

  FIG. 6 shows the installation state of the cloth frame with floor, the stair member, the stair opening handrail, and its claw gripping metal fittings on the stair lift side when the stair opening handrail shown in Patent Document 2 is incorporated. . (a) is a plan view, (b) is an enlarged plan view of the ellipse A part of (a) (near the claw gripping bracket of the stairway opening handrail), (c) is a front view of (b), (d) FIG. 4B is a cross-sectional view (right side view) taken along line BB in FIG.

  A claw gripping metal fitting 52 provided obliquely downward is attached to the right end portion of the girder 33 of the stairway opening handrail, and its receiving port is inserted into the horizontal rail 3. Therefore, the installation level of the girder 33 is higher than the floor level of the floor-equipped cloth frame 11 installed in parallel, and interference between the girder 33 and the floor-equipped cloth frame 11 can be avoided. It is not necessary to shift the installation position of the attached cloth frame 11 in the lateral direction (downward in FIG. 6). As a result, the gap 46 between the cloth frame with a floor (small anti) 11 ′ and the cloth frame with a floor (large anti) 11 ″ facing each other across the horizontal rail 3 can be kept as narrow as about 20 mm.

  Thus, by attaching the claw gripping metal fittings 52 provided obliquely downward to both ends of the beam member 33 of the stairway opening handrail 32, the gap generated between the floored cloth frames can be kept narrow. A drop lock (not shown) is also attached to the claw gripping metal fitting 52, and the claw gripping metal fitting 52 is attached to the claw gripping metal fitting 52 by inserting the receiving port of the claw gripping metal fitting 52 into the horizontal rail 3 and then applying the locking lock. It can be prevented from coming off the side rail. However, since the installation level of the girder 33 is higher than the floor surface level of the cloth frame 11 with a floor installed in parallel, as shown in FIG. It protrudes on the floor surface of the attached cloth frame 11. Therefore, as shown in FIG. 7, there is a possibility that the worker 80 may be caught in the girder 33 and fall down.

  The present invention has been made in order to solve such problems, and can keep the gap between the cloth frames with the floor narrow and project the girder on the floor surface. It is an object of the present invention to provide a stairway opening handrail having no staircase and a temporary scaffold incorporating the stairway opening handrail.

  In order to solve the above-mentioned object, the present inventors have made various studies, and as a result, obtained the following findings (a) to (d).

  (a) When the stairway member and the staircase opening handrail are incorporated into the frame scaffolding, in order to keep the gap between the floored cloth frames narrow, the stairway opening handrail girder and the girder in parallel What is necessary is just to avoid the interference of the cloth frame with a floor installed.

  (b) In order to avoid interference with the cloth frame with the floor installed in parallel with this girder without protruding the girder of the stairway opening handrail above the floor surface, the girder of the stairway opening handrail Of the metal fittings installed at both ends of the material, at least the metal fitting on the stairway side should be inserted into the cross rail as an eccentric metal fitting with a step in the width direction of the girders in plan view. . In this way, the upper level of the girder material of the opening handrail and the floor surface level of the cloth frame with the floor installed in parallel can be made substantially the same height, so that the worker hooks on the girder material. The fear is small.

  (c) When the stairway member and the stairway opening handrail are installed in the frame scaffolding, in order to keep the gap between the cloth frames with the floor narrow, the eccentric outer surface of the eccentric gripping metal and the outer surface of the above-mentioned beam member Are preferably on the same vertical plane.

  (d) However, as shown in Fig. 2, there are two ways to install the staircase member, so the eccentric gripping bracket needs to be eccentric to the right and left. Therefore, it is necessary to prepare two types of an opening handrail having a grip metal fitting with a right-side eccentricity and an opening handrail having a grip metal fitting with a left-side eccentricity. However, since it is uneconomical to prepare two types of opening handrails, it is preferable that one type of opening handrail can be used regardless of how the staircase member is incorporated. To do this, replace one of the metal fittings installed at both ends of the girder of the staircase opening handrail with a claw eccentric gripping metal with a claw-shaped tip, and replace the claw eccentric gripping metal with the girder of the opening handrail. By making it possible to rotate around the axis of the material, the eccentricity on the right side and the eccentricity on the left side may be switched, and then the rotation may be fixed. In order to fix the rotation, for example, a V pin and a bolt nut may be used.

  The present invention has been completed based on such findings, and the gist of the following (1) to (4) staircase opening handrails and (5) to (6) frame scaffolds. Hereinafter, (1) to (6) may be collectively referred to as the present invention.

  (1) A staircase opening handrail having girders with grips that can be used to hold a horizontal beam or a horizontal member of a temporary scaffolding in the vertical direction at both ends, and at least the stairway side of the staircase A staircase opening handrail, wherein the gripping metal bracket is an eccentric metal gripping part having a step in the width direction of the beam member in plan view.

  (2) The stairway opening handrail as described in (1) above, wherein the outer surface in the eccentric direction of the eccentric gripping metal and the outer surface of the girder are on the same vertical plane.

  (3) The stairway opening handrail according to (1) or (2) above, wherein the eccentric gripping metal has a claw shape at the tip and is rotatable about the axis of the girder.

  (4) The stairway opening handrail according to (3) above, wherein the eccentric gripping metal fitting having a claw-shaped tip can be fixed in rotation by a V pin or a bolt and nut.

  (5) A temporary scaffold comprising the stairway opening handrail of any one of (1) to (4) above.

  (6) The temporary scaffold according to (5) above, wherein an eccentric direction of the eccentric gripping metal is opposite to the staircase opening.

  The staircase opening handrail according to the present invention can keep the gap between the cloth frames with a floor narrow and does not cause the girder material of the stairway opening handrail to protrude above the floor surface. In the temporary scaffolding in which the opening handrail is incorporated, it is possible to prevent the worker from taking a foot and falling.

An example of forming a frame scaffold using a torii frame is shown. (a) is a front view, (b) is a right side view. It is two examples (plan view) when a staircase member is incorporated. It is a front view which shows an example of the stairway opening handrail proposed by patent document 1. FIG. It is a top view which shows an example when the stairs opening handrail of FIG. 3 is attached to the frame scaffold incorporating a stairs member. It is a left view which shows an example when the stairway opening handrail of FIG. 3 is attached to the frame scaffold incorporating a staircase member. The installation situation of the cloth frame with a floor, the staircase member, the staircase opening handrail, and its claw gripping metal fittings on the elevator door side of the staircase when the stairway opening handrail shown in Patent Document 2 is incorporated is shown. (a) is a plan view, (b) is an enlarged plan view in the vicinity of the claws grabbing bracket of the stairway opening handrail, (c) is a front view of (b), (d) is a BB line of (b) It is arrow sectional drawing (right view). FIG. 6 (d) shows a situation where an operator takes a foot on the girder of the handrail of the staircase opening. An example of the stairway opening handrail which concerns on this invention is shown. (a) is a front view, (b) is an enlarged front view of part B (near an eccentric gripping metal fitting) of (a), and (c) is a plan view of (b). The installation situation of the cloth frame with a floor, the staircase member, the stairway opening handrail, and the eccentric gripping metal fitting at the elevator opening side of the staircase when the stairway opening handrail shown in FIG. 8 is incorporated is shown. (a) is an enlarged plan view in the vicinity of the eccentric gripping metal fitting, (b) is a front view of (a), and (c) is a sectional view (right side view) taken along the line CC of (a). The other example of the handrail of a staircase opening part which concerns on this invention is shown. (a) is a front view, (b) is an enlarged front view of part C (near the claw eccentric gripping metal fitting) of (a), and (c) is a plan view of (b). The installation situation of the cloth frame with a floor, the staircase member, the staircase opening handrail, and the claw eccentric gripping metal fitting at the elevator door side of the staircase when the stairway opening handrail shown in FIG. 10 is incorporated is shown. (a) is an enlarged plan view of the vicinity of the claw eccentric gripping metal fitting, (b) is a front view of (a), and (c) is a sectional view (right side view) taken along the line CC of (a). . FIG. 11 is an enlarged view of a portion C (in the vicinity of the rotary connection member and the claw eccentric gripping metal fitting) of FIG. (a) is a front view, (b) is a plan view. The left side is attached to the right end portion of the beam of the staircase opening handrail, and shows the state where the rotation of the rotary connecting member is fixed, and the right side shows the removed state. It is explanatory drawing when changing the eccentric direction of a claw eccentric gripping metal fitting using a V pin. It is explanatory drawing when changing the eccentric direction of a claw eccentric gripping metal fitting using a bolt nut.

  A staircase opening handrail according to the present invention and a temporary scaffold in which the stairway opening handrail is incorporated will be described below with reference to the drawings. In addition, this invention is not limited to a following example.

  FIG. 8 shows an example of a staircase opening handrail according to the present invention. (a) is a front view, (b) is an enlarged front view of part B (near an eccentric gripping metal fitting) of (a), and (c) is a plan view of (b).

  The stairway opening handrail 32 includes a girder 33 having a grip 50 at the left end on the non-lift side of the stairs and an eccentric grip 53 at the right end on the stair lift side, and three support members 34, a frame-shaped handrail frame composed of an upper railing material 35 and an intermediate railing material 36, and a horizontal rail between the upper railing material 35 and the middle railing material 36. It consists of a rotating handrail member 39 having a vertical column fixing bracket 38, and the lower portions of the two support members 34 are fixed perpendicularly to the beam member 33. The gripping metal fitting 50 and the eccentric gripping metal fitting 53 both have a flat plate shape having a downward receiving port, and are vertically attached on an extension line in the axial direction of the beam member 33.

  A frame-shaped handrail composed of the three support members 34, the upper cross rail material 35 and the middle cross rail material 36 is installed in parallel with the cloth frame 11 with the floor between the horizontal rails 3 of the adjacent torii frame. This prevents the worker from falling from the side surface of the cloth frame 11 with the floor to the side opening of the stairs. Then, the rotating handrail material 39 attached between the upper handrail material 35 and the middle handrail material 36 is rotated in the horizontal direction and pulled out, and the vertical column fixing bracket 38 provided in the middle of the rotating handrail material 39 is connected to the torii gate. By fixing to a vertical column (not shown) of the frame, a rotating handrail material 39 that is rotatably mounted in a horizontal direction between the upper railing material 35 and the middle railing material 36 is provided on the cloth frame with a floor. Prevents workers from falling from the end to the end opening on the non-lift door side of the stairs.

  A drop lock 51 is attached to the grip 50 provided at the left end of the girder 33 of the handrail 32 of the staircase opening. After the catch of the grip 50 is hooked on the side rail of the adjacent torii frame, the drop lock 51 is attached. By hanging, it is possible to prevent the gripping metal fitting 50 from being detached from the horizontal rail. A drop lock 51 is also attached to the eccentric gripping metal 53 provided at the right end of the girder 33, and after the hook of the eccentric gripping metal 53 is hooked on the side rail 3 of the adjacent torii frame, the drop lock 51 is hooked. Thus, the eccentric gripping metal fitting 53 can be prevented from being detached from the horizontal rail. However, while the gripping metal fitting 50 has a simple flat plate shape, the eccentric gripping metal fitting 53 has a flat plate shape having a step in the width direction of the girders.

  FIG. 9 shows an installation state of the cloth frame with a floor, the stair member, the stair opening handrail, and the eccentric gripping bracket on the stair lift side when the stair opening handrail shown in FIG. 8 is incorporated. (a) is an enlarged plan view in the vicinity of the eccentric gripping metal fitting, (b) is a front view of (a), and (c) is a sectional view (right side view) taken along the line CC of (a).

  At the right end of the girder 33 of the handrail of the staircase opening, an eccentric gripping metal 53 having a step 55 in the width direction of the girder is vertically attached on the extension line in the axial direction of the girder 33, and its downward receiving port is horizontally located. It is plugged into the pier 3. At this time, as shown in FIG. 9 (c), the upper level of the girder 33 is almost the same level as the floor surface level of the cloth frame with floor 11 installed in parallel, and the girder of the staircase opening handrail. Does not protrude above the floor. Moreover, since the eccentric gripping metal 53 has the level | step difference 55, since the interference of the girder material 33 and the cloth frame 11 with a floor can be avoided, the installation position of this cloth frame 11 with a floor is horizontal direction (FIG. 9). Now, it is not necessary to shift it downward), and the gap between the cloth frames with the floor can be kept narrow. Therefore, the operator is prevented from taking a foot on this girder 33, so that the worker can be prevented from taking a foot and falling. In FIG. 9 (a), the stair girder 76 and the girder 33 of the stairway opening handrail seem to interfere with each other in plan view, but the stair girder 76 is inclined downward in the left direction. In contrast to the installed staircase opening handrail girder 33, it is installed horizontally, so that there is no interference in stereoscopic view.

  FIG. 10 shows another example of the stairway opening handrail according to the present invention. (a) is a front view, (b) is an enlarged front view of part C (near the rotary connecting member and the claw eccentric gripping metal fitting) of (a), and (c) is a plan view of (b).

  The stairway opening handrail 32 has a grip 50 at the left end on the non-lift side of the staircase, and a girder having a claws eccentric grip 54 at the right end on the staircase side through a rotary connecting member 56. Horizontally between the frame-shaped handrail frame composed of the material 33, the three support members 34, the upper rail material 35 and the middle rail material 36, and between the upper rail material 35 and the middle rail material 36 And a rotating handrail member 39 having a vertical column fixing bracket 38 in the middle. The lower portions of the two support members 34 are fixed perpendicularly to the beam member 33. The gripping metal 50 has a flat plate shape having a downward receiving port, and is attached vertically on an extension line in the axial direction of the beam member 33. The claw eccentric gripping metal fitting 54 has a flat plate shape having a lateral receiving port, and is vertically attached on an extension line in the axial direction of the beam member 33. Since the rotary connecting member 56 is interposed, the claw eccentric gripping metal fitting 54 can be rotated about the axis of the beam member 33.

  A frame-shaped handrail composed of the three support members 34, the upper cross rail material 35 and the middle cross rail material 36 is installed in parallel with the cloth frame 11 with the floor between the horizontal rails 3 of the adjacent torii frame. This prevents the worker from falling from the side surface of the cloth frame 11 with the floor to the side opening of the stairs. Then, the rotating handrail material 39 attached between the upper handrail material 35 and the middle handrail material 36 is rotated in the horizontal direction and pulled out, and the vertical column fixing bracket 38 provided in the middle of the rotating handrail material 39 is connected to the torii gate. By fixing to a vertical column (not shown) of the frame, a rotating handrail material 39 that is rotatably mounted in a horizontal direction between the upper railing material 35 and the middle railing material 36 is provided on the cloth frame with a floor. Prevents workers from falling from the end to the end opening on the non-lift door side of the stairs.

  Hook the claw eccentric grip 54 at the right end of the girder 33 of the stairway opening handrail 32 to the right side of the torii frame 3 before the grip 50 at the left end, and then to the grip at the left end. By hooking the drop lock 51 after the hook of the metal fitting 50 is hooked on the horizontal rail 3 of the adjacent torii frame, the grip metal fitting 50 can be prevented from being detached from the horizontal rail. Accordingly, the claw eccentric gripping metal fitting 54 does not require a drop lock.

  FIG. 11 shows the installation status of the cloth frame with a floor, the stair member, the stair opening handrail, and the claw eccentric gripping metal fitting on the stair lift side when the stair opening handrail shown in FIG. 10 is incorporated. (a) is an enlarged plan view of the vicinity of the claw eccentric gripping metal fitting, (b) is a front view of (a), and (c) is a sectional view (right side view) taken along the line CC of (a). .

  A claw eccentric gripping metal fitting 54 having a step 55 in the width direction of the beam member is vertically attached to the right end portion of the beam member 33 of the handrail of the staircase opening vertically on the extension line of the beam member 33 in the axial direction, Is inserted into the crosspiece 3. At this time, as shown in FIG. 11 (c), the upper level of the girder 33 is almost the same level as the floor surface level of the cloth frame 11 with floors installed in parallel, and the girder of the staircase opening handrail. Does not protrude above the floor. Further, since the claw eccentric gripping metal fitting 54 has the step 55, it is possible to avoid the interference between the girder 33 and the floored cloth frame 11, so that the installation position of the floored cloth frame 11 is set in the horizontal direction ( In FIG. 11, it is no longer necessary to shift downward), and the gap between the cloth frames with the floor can be kept narrow. Therefore, the operator is prevented from taking a foot on this girder 33, so that the worker can be prevented from taking a foot and falling. In FIG. 11 (a), the stair beam 76, the claw eccentric gripper 54 at the right end, and the rotation connecting member 56 that connects the beam member 33 of the staircase opening handrail appear to interfere with each other in plan view. However, since the stair girder 76 is installed to be inclined downward in the left direction, the rotary connecting member 56 is installed horizontally, so that there is no interference in stereoscopic view.

  FIG. 12 is an enlarged view of a portion C (near the rotary connecting member and the claw eccentric gripping metal fitting) of FIG. (a) is a front view, (b) is a plan view. The left side is attached to the right end of the spar of the staircase opening handrail and shows the state where the rotation of the rotary connecting member is fixed, and the right side shows the state where the rotary connecting member is removed from the spar.

  A claw eccentric gripping metal fitting 54 is attached to the right end portion of the stirrer opening handrail girder 33 via a rotation connecting member 56. The rotation connecting member 56 has a cylindrical shape at the left end, and the right end is narrowed to a vertical planar shape, and the claw eccentric gripping metal fitting 54 is welded. Then, the rotation connection member 56 can be rotated around the axis of the beam member 33 together with the claw eccentric gripping metal fitting 54 by extrapolating the left end of the rotation connection member 56 to the right end portion of the cylindrical beam member 33. It is. A V pin 65 is inserted in the right end portion of the beam member 33. When the protrusion 65a of the V pin 65 is fitted in both the through hole 60 of the beam member 33 and the through hole 61 of the rotation connection member 56, the rotation connection is established. The rotation of the member 56 can be fixed.

  Therefore, after the V pin 65 is removed from the through holes 60 and 61 and the rotary connecting member 56 is rotated 180 ° around the axis, the V pin 65 is fitted into the through holes 60 and 61 to fix the rotation. As can be seen, the direction of the step 55 of the claw eccentric gripper 54 welded to the right end of the rotary connecting member 56 can be changed. In this way, the right-handed eccentricity and the left-handed eccentricity of the claw eccentric gripping metal fitting 54 can be switched while being attached to the end of the staircase opening handrail girder 33, regardless of how the staircase member is incorporated, One type of opening handrail can be used.

  In order to fix the rotation connecting member 56 around the axis of the beam member 33, a bolt and nut can be used instead of the V pin (see FIG. 14).

  After the bolt 67 and the nut 68 are removed from the through holes 60 and 61 and the rotary connecting member 56 is rotated 180 ° around the axis, the rotation is fixed by fitting the bolt 67 and the nut 68 into the through holes 60 and 61. As with the V-pin, the claw eccentric gripping metal fitting 54 can be switched between the right-side eccentricity and the left-side eccentricity so that it can be handled with one type of opening handrail regardless of how the staircase member is assembled. it can.

  According to the present invention, the stairway opening handrail and the stairway opening that can keep the gap between the cloth frames with the floor narrow and do not cause the stairway opening handrail to protrude on the floor surface. A temporary scaffold incorporating a handrail can be provided.

2 Vertical column 3 Horizontal rail 4 Torii frame 6a, 6b Lock bracket 9 Hozo material 11, 11 ', 11 "Cloth frame with floor 13 Streaks 21 Arm lumber 22 Building 25 Small anti 26 Large anti 32 Stair opening handrail 33 Stair opening handrail Girder material 34 Support material 35 Upper rail material 36 Middle rail material 38 Vertical column fixing bracket 39 Rotating rail material 43 Triangular clearance 46 Clearance between cloth frames with floor 50 Grapping bracket 51 Drop lock 52 Claw gripping bracket 53 Eccentricity Gripping bracket 54 Claw eccentric gripping bracket 55 Step 56 Rotating connection member 60 Through hole in girder material of staircase opening 61 Through hole in rotating connection member 65 V pin 65a Protruding part of V pin 67 Bolt 68 Nut 75 Stair member 76 Stair girder Material 80 Worker

Claims (6)

  A staircase opening handrail having girders provided at both ends with a grabber that can grab a horizontal beam or a horizontal member of a temporary scaffold in the vertical direction, and is a grabber that is at least on the stair lift side of the grabber A staircase opening handrail characterized in that is an eccentric gripping bracket having a step in the width direction of the beam member in plan view.   The stairway opening handrail according to claim 1, wherein an outer surface in an eccentric direction of the eccentric gripping metal and an outer surface of the beam member are on the same vertical plane.   The staircase opening handrail according to claim 1 or 2, wherein the eccentric gripping metal has a claw shape at a tip and is rotatable around an axis of the beam member.   The staircase opening handrail according to claim 3, wherein the eccentric gripping metal fitting can be fixed in rotation by a V pin or a bolt and nut.   A temporary scaffold, wherein the staircase opening handrail according to any one of claims 1 to 4 is incorporated.   The temporary scaffold according to claim 5, wherein an eccentric direction of the eccentric gripping metal is opposite to the staircase opening.

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