Scaffold and assembly method of scaffold

Abstract

To provide a scaffold and an assembly of the scaffold capable of connecting a beam member to a joint of a scaffold body without requiring a worker to lean out while the beam member is configured compact.SOLUTION: A scaffold is provided with a scaffold body having a plurality of beam members 5 placed parallely, a joint 6 connected to an end part of the beam member 5 with a connection member, and a work floor installed between the beam members 5, wherein the beam member 5 has a pair of left / right attachment pieces 53, 53 arranged on each end of lower ends of upper beam members 50 and having a pin hole 53a formed therein, the joint 6 has a plurality of plates 61 arranged on a periphery of a cylinder 60 in a peripheral direction, the plate 61 has a concave part 61c formed in an upper end and an insertion-through hole opposite to the pin hole in a state it is fitted between the attachment pieces 53, 53, the connection member is a connection pin 7 inserted into the pin hole and the insertion-through hole opposite to each other in a state the plate 61 is fitted between the attachment pieces 53, 53.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a suspended scaffold and a method for assembling the suspended scaffold. [Background technology]

[0002] Conventional suspended scaffolding includes those suspended from buildings or structures by hanging members such as chains, and used in the construction and maintenance of buildings or structures.

[0003] For example, the suspended scaffolding disclosed in Patent Document 1 comprises multiple beam members arranged parallel to one another and scaffolding panels that are spanned between the beam members. The beam members are configured in a truss shape with four beam members arranged side by side and extending parallel to one another, and multiple diagonal members that span between the upper and lower beam members.

[0004] However, in a suspended scaffolding configured in this way, the beam members are large, with four beams and multiple diagonal members, which makes the entire suspended scaffolding large. For this reason, it is difficult to install the suspended scaffolding of Patent Document 1 in places with many obstacles around.

[0005] In contrast, the suspended scaffolding of Patent Document 2 includes a scaffolding board having multiple beam members, joints connecting the ends of the beam members, and multiple work platforms installed between the beam members. The beam members are configured with a pair of upper and lower beam members, a beam member connecting the upper beam member and the lower beam member, and a pair of left and right plate members arranged between the ends of the upper and lower beam members when viewed from the axial direction. Therefore, the beam members of the suspended scaffolding of Patent Document 2 have a compact structure because the beam members are not arranged side by side in the horizontal direction. This compact structure of the beam members allows the suspended scaffolding to be installed even in places with many obstacles around.

[0006] In addition, in the suspended scaffolding of Patent Document 2, the plates in the joint, which has a cylindrical body whose axis runs vertically and a plurality of plates arranged circumferentially at predetermined intervals around the outer periphery of the cylindrical body, are inserted into the gaps between the plates of the beam member, and pins are inserted into holes formed in the parts of the plates that protrude from the plates, thereby connecting the beam member to the plates of the joint. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Utility Model Registration No. 3223667 [Patent Document 2] Patent No. 7049016 Summary of the Invention [Problem to be solved by the invention]

[0008] In the suspended scaffolding of Patent Document 2, which is configured in this manner, new beam members are connected to each joint arranged side by side, and work platforms are installed between adjacent beam members, thereby expanding the floor area of ​​the suspended scaffolding while it is suspended from a building, structure, etc.

[0009] Here, the pair of plates attached to the ends of the beam members are connected at the top and bottom ends to the upper and lower beam members, respectively, so in order to insert the joint plate into the gap between the beam member plates, it is necessary to insert the joint plate between the beam member plates from the side.

[0010] In this way, in order to connect a beam member to the joint of a conventional suspended scaffolding suspended from a building or structure, the worker had to lean over the work platform, hold the beam member in a horizontal position with the gap between the plates directly facing the plate of the joint, and pull the beam member toward the joint to insert the plate between the plates.

[0011] Therefore, the present invention aims to provide a suspended scaffolding and an assembly method for suspended scaffolding that allows the beam members to be configured compactly and that allows workers to safely and easily connect the beam members to joints without having to lean out from the work platform. [Means for solving the problem]

[0012] In order to achieve the above object, the present invention provides a suspended scaffolding comprising a scaffolding body having a plurality of parallel-arranged beam members, joints connected to the ends of the beam members by connecting members, and a work platform installed between the beam members, and a hanging member for suspending the scaffolding body, wherein the beam members have beam members and a pair of mounting pieces provided at the lower ends of each beam member, arranged side by side as viewed from the axial direction and having opposing pin holes, the joints have a cylindrical body whose axis runs vertically and a plurality of plates arranged circumferentially at a predetermined interval around the outer periphery of the cylindrical body and capable of fitting between the mounting pieces along the axial direction of the cylindrical body, the plates having recesses formed at their upper ends and insertion holes that face the pin holes of the mounting pieces when fitted between the mounting pieces, and the connecting members are connecting pins that are inserted into the opposing pin holes and insertion holes when the plates are fitted between the mounting pieces. With this configuration, the beam members do not have beam members arranged side by side, resulting in a compact structure. Then, one end of the beam member is placed upright and inserted into the recess in a vertical orientation, and the other end of the beam member is rotated toward the back using that end as a fulcrum, and the plate is fitted between the mounting pieces on one end of the beam member, and a connecting pin is inserted into the pin holes in the opposing mounting pieces and the insertion hole in the plate, thereby connecting the beam member to the joint. This type of beam member connecting work does not require the worker to lean out from the work platform of the scaffolding body, which is suspended and supported by a building or structure. Therefore, the beam member can be configured compactly and the work of connecting the beam member to the joint of the scaffolding body can be performed safely.

[0013] Furthermore, in the suspended scaffolding of the present invention, the width of the recess may be wider than the vertical height of the beam. With this configuration, one end of the beam can be inserted into the recess in a vertical position, and a gap is formed between the one end of the beam and the side wall of the recess. This stabilizes the position of the beam within the recess by allowing the beam to be oriented vertically, and the gap between the one end of the beam and the side wall of the recess allows the beam to rotate toward the rear, making it safe and easy to tilt the vertically oriented beam toward the rear.

[0014] In addition, in the suspended scaffolding of the present invention, the upper end of the plate may be positioned lower than the upper end of the cylindrical body. With this configuration, the end of one end of the horizontally oriented beam directly faces the outer periphery of the cylindrical body, so that by abutting the end of the beam against the outer periphery of the cylindrical body, the beam member can be positioned in the extension direction of the plate. This makes it easy to align the pin holes of the mounting pieces with the insertion holes.

[0015] In addition, in the suspended scaffolding of the present invention, the beam member may have a lower beam member arranged below the beam member and extending parallel to the beam member, and the pair of mounting pieces may be arranged vertically between the beam member and the lower beam member. With this configuration, the lower part of the gap between the mounting pieces is blocked by the lower beam member. Therefore, when the beam member is inserted into the recess in a vertical orientation and tilted to a sideways position, the lower beam member abuts against the lower end of the plate, preventing the beam member from tilting further. Therefore, the beam member can be positioned so that the pin hole in the mounting piece faces the insertion hole in the plate. This makes it easier to connect the beam member to the joint plate.

[0016] In addition, in the suspended scaffolding of the present invention, the plate may have a relief portion formed by cutting out the lower side of the plate on the side opposite the cylinder. With this configuration, even if a pair of mounting pieces is spanned between a beam and a lower beam, when the beam is tilted toward the rear and the plate is fitted between the mounting pieces, the lower beam of the beam does not interfere with the plate, and the plate can be smoothly inserted between the mounting pieces. Furthermore, with this configuration, it is not necessary to change the vertical length of the plate or the vertical spacing between the beam and the lower beam to prevent the lower beam of the beam from interfering with the plate, so it is possible to prevent a decrease in the strength of the plate while avoiding an increase in the weight of the beam.

[0017] Furthermore, in the suspended scaffolding of the present invention, the beam member may have a lower beam member arranged below the beam member and extending parallel to the beam member, and the sides of the pair of mounting pieces may be connected to the ends of the lower beam member. With this configuration, when the ends of the beam member are inserted into the recesses of the plate in a vertical orientation and the beam member is tilted backward to fit the plate between the mounting pieces, the lower beam member does not interfere with the plate. Therefore, since there is no need to process the plate, reduction in plate area can be suppressed and a decrease in plate strength can be prevented. Furthermore, with this configuration, because the sides of the pair of mounting pieces are connected to the ends of the lower beam member, the lower part of the gap between the mounting pieces is open. Therefore, two scaffolding bodies can be assembled simultaneously in mid-air, and by suspending a beam member between the opposing joints of the two scaffolding bodies, the two scaffolding bodies can be connected in mid-air to assemble a single suspended scaffolding, allowing suspended scaffolding with a large floor area to be assembled in a short time.

[0018] In addition, in the suspended scaffolding of the present invention, the pin holes formed in the mounting pieces and the insertion holes formed in the plates may each be multiple, and the connecting pin may have pin portions that are the same number and spaced apart as the pin holes and insertion holes that face each other when the plates are fitted between the mounting pieces, and a connecting portion that connects the pin portions. With this configuration, the mounting pieces of the beam member and the joint plate are connected at multiple locations, restricting the vertical rotation of the beam member relative to the plate and suppressing vertical rattle of the beam member. Furthermore, because the connecting pin has the same number of pin portions as the number of pin holes and insertion holes, the pin portions can be inserted into the multiple pin holes and insertion holes provided in the mounting pieces and the plate 61 at once, improving the efficiency of the work of connecting the beam member to the joint compared to inserting pins one by one into multiple pin holes and insertion holes.

[0019] Furthermore, the method for assembling a suspended scaffolding of the present invention comprises a scaffolding body having a plurality of beam members arranged in parallel, joints connected to the ends of the beam members by connecting members, and a work platform installed between the beam members, and a suspension member for suspending the scaffolding body, wherein the beam members have a beam member and a pair of mounting pieces respectively provided at the lower ends of each end of the beam member, arranged side by side when viewed from the axial direction, and having pin holes facing each other, and the joint has a cylindrical body whose axis is aligned vertically, and a plurality of plates arranged circumferentially at predetermined intervals on the outer periphery of the cylindrical body and capable of being fitted between the mounting pieces aligned along the axial direction of the cylindrical body, The plate has a recess formed on the top and an insertion hole that faces the pin hole of the mounting piece when it is fitted between the mounting pieces, and the connecting member is a connecting pin that is inserted into the opposing pin hole and insertion hole when the plate is fitted between the mounting pieces.This method of assembling suspended scaffolding is characterized by including the steps of: inserting one end of a beam into the recess in an orientation aligned in the vertical direction; rotating the other end of the beam toward the back with one end of the beam inserted into the recess and tilting it down, and fitting the plate between the mounting pieces on one end side of the beam; and inserting the connecting pin into the pin hole of the opposing mounting piece and the insertion hole of the plate. According to this assembly method, in the steps of inserting one end of the beam into the recess in an up-down orientation, rotating the other end of the beam toward the back while it is inserted into the recess and fitting a plate between the mounting pieces on one end of the beam, and inserting connecting pins into the pin holes in the opposing mounting pieces and the insertion holes in the plate, the worker does not need to lean out from the work platform of the scaffolding body that is suspended and supported on a building, structure, etc. Therefore, according to this method of assembling a suspended scaffolding, the beam members can be configured compactly and the work of connecting the beam members to the joints of the scaffolding body can be carried out safely. [Effects of the Invention]

[0020] According to the suspended scaffolding and method of assembling the suspended scaffolding of the present invention, the beam members can be configured compactly while the work of connecting the beam members to the joints of the scaffolding main body can be carried out safely and easily. [Brief explanation of the drawings]

[0021] [Figure 1]FIG. 1 is a perspective view showing the suspended scaffolding of this embodiment. [Figure 2] 10 is a side view of a beam member according to the present embodiment. [Figure 3] FIG. 2 is a front view of the beam member of the present embodiment as viewed from one end side. [Figure 4] FIG. 2 is a perspective view of the joint of the present embodiment. [Figure 5] FIG. 4 is an enlarged side view showing a connection portion between a joint and a beam member according to the present embodiment. [Figure 6] FIG. 2 is a perspective view of a connecting pin according to the present embodiment. [Figure 7] This figure explains the method of assembling the suspended scaffolding of this embodiment, and shows the process of inserting one end of the upper beam member of the beam member into the recess of the joint plate in an orientation aligned in the vertical direction. [Figure 8] This figure explains the method of assembling the suspended scaffolding of this embodiment, and shows the process of rotating the other end of the upper beam member of the beam member toward the back and tilting it down. [Figure 9] This is a diagram explaining the method of assembling the suspended scaffolding of this embodiment, and shows the process of arranging two beam members extending in the depth direction in parallel. [Figure 10] FIG. 10 is a diagram illustrating a method for assembling the suspended scaffolding of this embodiment, showing the process of installing a work platform between two beam members arranged in parallel. [Figure 11] This figure explains the method of assembling the suspended scaffolding of this embodiment, and shows the process of bridging a beam member along the width direction between joints attached to the other ends of two beam members arranged in parallel. [Figure 12] FIG. 10 is a diagram for explaining a method for assembling a suspended scaffolding according to another embodiment, showing the process of suspending a beam member between the joints of two suspended scaffoldings. DETAILED DESCRIPTION OF THE INVENTION

[0022] The present embodiment will now be described with reference to the drawings, in which like reference numerals are used throughout the several views to denote like parts.

[0023] The suspended scaffolding 1 of this embodiment comprises a scaffolding body 10 having a plurality of beam members 5, 5 arranged in parallel, joints 6 connected to the ends of the beam members 5, and a work platform 3 installed between the beam members 5, 5, and a chain 4 as a suspension member for suspending the scaffolding body 10.

[0024] In this embodiment, as shown in FIG. 1 , the scaffolding main body 10 includes a plurality of frame bodies 2 formed by connecting a plurality of beam members 5 to each joint 6, and a work platform 3 consisting of a plurality of scaffolding planks 3 a spanning between the beam members 5, 5 of each frame body 2, with each frame body 2 being connected and arranged in the depth direction and width direction, respectively. Note that in FIG. 1 , the work platforms 3 installed on some of the frame bodies 2 are omitted to make it easier to understand the structure of the scaffolding main body 10. Furthermore, the suspended scaffolding 1 shown in FIG. 1 includes four frame bodies 2 arranged in two rows in the width direction and two rows in the depth direction, but the number of frame bodies 2 may be determined arbitrarily depending on the floor area of ​​the scaffolding main body 10, and the number of frame bodies 2 may be one. Note that the suspension member for suspending the scaffolding main body 10 is not limited to a chain and may be, for example, a wire rope.

[0025] More specifically, the frame body 2 is formed in a quadrangular shape in plan view by two beam members 5, 5 arranged in parallel along the depth direction, two beam members 5, 5 arranged in parallel along the width direction, and four joints 6 connected to the ends of each beam member 5 by connecting pins 7 as connecting members described below, connecting the ends of each beam member 5. Adjacent frame bodies 2 in the depth direction and width direction share a central beam member 5 and the joints 6 connected to both ends of the beam member 5. Note that in this embodiment, the frame body 2 includes two beam members 5, 5 arranged in parallel along the depth direction and two beam members 5, 5 arranged in parallel along the width direction. However, if the two beam members 5, 5 arranged in parallel along the depth direction are connected by the work platform 3 to function as a structure, the two beam members 5, 5 arranged in parallel along the width direction may be omitted. Furthermore, the shape of the frame body 2 may be other than a square in plan view, such as a rectangle or a parallelogram.

[0026] 2 and 3, the beam member 5 comprises a pair of upper and lower beam members 50, 51, a plurality of beam members 52 spanning between the upper beam member 50 and the lower beam member 51 and connecting the beam members 50, 51, and a pair of flat mounting pieces 53, 53, 54, 54 extending vertically from the lower part of each end of the upper beam member 50 and on the left and right as viewed from the axial direction. As such, the beam member 5 of this embodiment does not have a structure in which the beam members are arranged side by side, and therefore has a compact structure in the width direction.

[0027] 2, the lower beam member 51 is provided with pin-shaped fixing portions 51a, 51a that protrude upward from the upper portion at two locations on the left and right in the axial direction. Although not shown, the strength of the frame body 2 can be increased by diagonally spanning the fixing portions 51a, 51a between the lower beam members 51, 51 that face each other in the depth direction or width direction in the frame body 2 with brace materials (not shown). However, if the strength of the frame body 2 is sufficient without the brace materials, the fixing portions 51a for installing the brace materials may be omitted.

[0028] Furthermore, the mounting pieces 53 and 54 have the same structure except for some parts. Specifically, each mounting piece 53, 54 has two pin holes 53a, 53a, 54a, 54a arranged side by side in the vertical direction as viewed from the axial direction of the beam member 5. In this embodiment, the upper beam member 50 and the lower beam member 51 are formed in a cylindrical shape, but they may have a shape other than a cylindrical shape, such as a rectangular tube shape.

[0029] 2 and 3, in this embodiment, an attachment piece 53 (hereinafter referred to as the "one-end attachment piece 53") provided on the right side in FIG. 2, which is one end of the beam member 5, spans between the lower part of the upper beam member 50 and the upper part of the lower beam member 51, and has its upper and lower ends connected to the upper beam member 50 and the lower beam member 51, respectively, so that the lower part of the gap between the one-end attachment pieces 53, 53 is blocked by the lower beam member 51. On the other hand, an attachment piece 54 (hereinafter referred to as the "other-end attachment piece 54") provided on the left side in FIG. 2, which is the other end of the beam member 5, has its lower end connected to the left end of the lower beam member 51 in FIG. 2, so that the lower part of the gap between the other-end attachment pieces 54, 54 is open. However, the lower part of the gap between the one-end attachment pieces 53, 53 may be open, and the lower part of the gap between the other-end attachment pieces 54, 54 may be blocked by the lower beam member 51. Alternatively, the lower portions of both the gap between the mounting pieces 53, 53 on one end side and the gap between the mounting pieces 54, 54 on the other end side may be open or closed.

[0030] As shown in FIG. 1, the work floor 3 is made up of a plurality of rectangular scaffolding boards 3a that are bridged between upper beam members 50, 50 of beam members 5, 5 that face each other in the width direction of the frame body 2.

[0031] A hook 3b is provided at each of the four corners of each longitudinal end of each scaffolding board 3a, and by hooking these hooks 3b onto the upper beam members 50 of the beam members 5, the scaffolding board 3a is spanned between the upper beam members 50, 50 of the beam members 5, 5 facing each other in the width direction. Although not shown, the hook 3b provided at one longitudinal end of the scaffolding board 3a and the hook 3b provided at the other end are arranged so as to be offset from each other in the short direction of the scaffolding board 3a. Therefore, when the scaffolding boards 3a are installed on the frames 2, 2 adjacent to each other in the width direction, the hooks 3b of the scaffolding boards 3a of the adjacent frames 2, 2 are hooked onto the central beam member 5, but the hooks 3b, 3b of each work platform 3 are arranged so as to be staggered on the central beam member 5 shared by the frames 2, 2 adjacent to each other in the width direction, so that the hooks 3b, 3b do not interfere with each other.

[0032] The above-described configuration of the work floor 3 is just one example, and the work floor 3 may be composed of a single scaffolding board 3a, or the scaffolding board 3a may be connected to the beam member 5 via mounting fittings other than hooks, and the scaffolding board 3a may be spanned between beam members 5, 5 facing each other in the width direction.

[0033] In this way, since multiple scaffolding boards 3a are hooked onto the upper beam 50, the load of the work floor 3 acts more heavily on the upper beam 50 than on the lower beam 51. Therefore, the upper beam 50 is required to have a higher bending strength than the lower beam 51, and so the diameter of the upper beam 50 is larger than the diameter of the lower beam 51, as shown in Figure 3. However, as long as the strength of the beam member 5 is not insufficient, the diameter of the lower beam 51 may be the same as the diameter of the upper beam 50, or the diameter of the lower beam 51 may be larger than the diameter of the upper beam 50.

[0034] 4, the joint 6 includes a cylindrical body 60 whose axis is aligned in the vertical direction, and four plates 61 that are arranged at 90-degree intervals in the circumferential direction on the outer periphery of the body 60 and aligned in the axial direction of the body 60. Note that the shape of the body 60 is not limited to a cylindrical shape as long as it is cylindrical.

[0035] The plate 61 has a plate main body 61a that protrudes from the outer periphery of the cylindrical body 60 in the radial direction of the cylindrical body 60 and is oriented vertically along the axial direction of the cylindrical body 60, a protruding portion 61b that protrudes upward from the upper portion on the tip side of the plate main body 61a, and a recessed portion 61c that is formed between the protruding portion 61b and the cylindrical body 60. In this embodiment, the recessed portion 61c is formed between the protruding portion 61b and the cylindrical body 60 at the upper end of the plate 61, but the position of the recessed portion 61c is not particularly limited, and for example, the recessed portion 61c may be formed at a position spaced apart from the cylindrical body 60 at the upper end of the plate 61.

[0036] 5, the upper end of the protrusion 61b, which is the upper end of the plate 61, is located lower than the upper end of the cylindrical body 60. Furthermore, the width of the recess 61c in the extension direction of the plate 61 (hereinafter simply referred to as the "width of the recess 61c") is set to be wider than the height of the upper beam member in the vertical direction.

[0037] Furthermore, the vertical length of the plate 61 is slightly shorter than the vertical distance between the upper beam member 50 and the lower beam member 51 of the beam member 5, and the thickness of the plate 61 is slightly thinner than the size of the gaps between the mounting pieces 53, 53, 54, 54 of the beam member 5, so that the plate 61 can be fitted between the mounting pieces 53, 53, 54, 54 as shown in Fig. 5. Furthermore, the upper and lower ends of the one-end mounting piece 53 are connected to the upper beam member 50 and the lower beam member 51, respectively. Therefore, when the plate 61 is fitted between the one-end mounting pieces 53, 53, the plate 61 is sandwiched between the upper beam member 50 and the lower beam member 51, unlike when the plate 61 is fitted between the other-end mounting pieces 54, 54, so that the relative movement between the beam member 5 and the joint 6 in the vertical direction is restricted.

[0038] Furthermore, the plate main body 61a is formed with two insertion holes 61a1, 61a1 that are arranged side by side in the up-down direction and that face the pin holes 53a, 54a of the mounting pieces 53, 54 when the plate 61 is fitted between the mounting pieces 53, 53, 54, 54. Also, the plate main body 61a is provided with a relief portion 61a2 that is formed by cutting out the lower side, away from the cylinder, at an angle, as shown in Fig. 4.

[0039] Then, as shown in Figure 5, with the plate 61 of the joint 6 fitted between the mounting pieces 53, 53, 54, 54 of the beam member 5, the beam member 5 is connected to the plate 61 of the joint 6 by inserting the pin portion 70 of the connecting pin 7, which serves as a connecting member and will be described later, into the two opposing pin holes 53a, 53a, 54a, 54a and the insertion holes 61a1, 61a1, respectively.

[0040] In addition, in this embodiment, the mounting pieces 53, 53, 54, 54 of the beam member 5 are pin-joined to the plate 61 of the joint 6 at two points, so that the vertical rotation of the beam member 5 relative to the plate 61 is restricted compared to when the mounting pieces 53, 53, 54, 54 of the beam member 5 are pin-joined to the plate 61 of the joint 6 at one point, thereby suppressing vertical rattle of the beam member 5.

[0041] In this embodiment, as shown in FIG. 5, the shape of the mounting pieces 53, 53, 54, 54 is set to be substantially the same as that of the plate 61 when the plate 61 is fitted between the mounting pieces 53, 53, 54, 54, but the shape of the mounting pieces 53, 53, 54, 54 is not particularly limited and may be, for example, a rectangular plate shape.

[0042] As shown in FIG. 6, the connecting pin 7 of this embodiment includes a pair of pin portions 70, 70 that can be inserted into the pin hole 53a and the insertion hole 61a1 and are arranged parallel to each other at the same intervals as the pair of pin holes 53a, 53a, 54a, 54a and the pair of insertion holes 61a1, 61a1, a cylindrical holding portion 71 as a connecting portion that connects the base ends of the pair of pin portions 70, 70, and a rectangular plate-shaped regulating portion 72 as a connecting portion that connects the centers of the pair of pin portions 70, 70.

[0043] When the connecting pin 7 is configured in this manner, a worker can hold the gripping portion 71 and insert the two pin portions 70 into two opposing pin holes 53a, 53a, 54a, 54a and insertion holes 61a1, 61a1 (hereinafter referred to as "holes 53a, 54a, 61a1") formed in the mounting pieces 53, 54 and the plate 61. In this way, since the two pin portions 70 can be inserted at once into the two holes 53a, 54a, 61a1 of the mounting pieces 53, 54 and the plate 61, the efficiency of the work of connecting the beam member 5 to the joint 6 is improved compared to when inserting one pin each into the two holes 53a, 54a, 61a1.

[0044] Furthermore, in this embodiment, the restricting portions 72 are provided at positions in the axial direction of the pin portions 70 where they come into contact with the mounting pieces 53, 54 when the pin portions 70 are inserted to appropriate positions relative to the mounting pieces 53, 54 and the holes 53a, 54a, 61a1 of the plate 61. Therefore, if the worker inserts the pin portions 70 into the holes 53a, 54a, 61a1 until the restricting portions 72 come into contact with the mounting pieces 53, 54, the insertion amount of the pin portions 70 is always constant, and therefore, it is possible to prevent variations in the connection strength between the mounting pieces 53, 54 of the beam member 5 and the plate 61 of the joint 6.

[0045] The restricting portion 72 may be, for example, a protrusion that protrudes from the outer periphery of the pin portion 70. Even in this case, the insertion amount of the pin portion 70 can be kept constant. However, if the restricting portion 72 is bridged between the pin portions 70, 70 as in this embodiment, the pair of pin portions 70, 70 can be supported by the gripping portion 71 and the restricting portion 72, and therefore the strength of the pin portion 70 against forces acting in the radial direction is increased.

[0046] In this embodiment, a through-hole 70a that penetrates radially is formed in the tip portion of one of the pin portions 70 (upper side in FIG. 6 ). This through-hole 70a is positioned so that it protrudes from the mounting pieces 53, 54 when the pin portion 70 is inserted into the holes 53a, 54a, 61a1 of the mounting pieces 53, 54 and the plate 61. Although not shown, by inserting a non-detachment pin (not shown) into the through-hole 70a while the pin portion 70 is inserted into the holes 53a, 54a, 61a1, the connecting pin 7 can be prevented from coming off the mounting pieces 53, 54 and the holes 53a, 54a, 61a1 of the plate 61.

[0047] The above-described configuration of the connecting pin 7 is one example, and for example, the connecting pin 7 may be configured by omitting either the gripping portion 71 or the restricting portion 72. Alternatively, the connecting pin 7 may be a plurality of independent pins, and the beam member 5 may be joined to the plate 61 of the joint 6 by inserting one pin into each of the holes 53a, 54a, 61a1 of the mounting pieces 53, 54 and the plate 61.

[0048] In addition, the number of holes 53a, 54a, 61a1 in the mounting pieces 53, 54 and plate 61 and the number of pin portions 70 of the connecting pin may be three or more, and even in this case, since the mounting pieces 53, 54 and plate 61 are connected at multiple points, vertical rattle of the beam member 5 can be suppressed, and multiple pin portions 70, 70 can be inserted into multiple holes 53a, 54a, 61a1 in the mounting pieces 53, 54 and plate 61 at one time, improving workability.

[0049] However, the number of holes 53a, 54a, 61a1 in the mounting pieces 53, 54 and the plate 61 may be one. In that case, the connecting pin may be one independent pin.

[0050] In addition, in this embodiment, the holes 53a, 54a, and 61a1 of the mounting pieces 53 and 54 and the plate 61 are arranged side by side in the vertical direction, but the direction in which the holes 53a, 54a, and 61a1 are arranged is not particularly limited, and they may be arranged side by side, for example, in the horizontal direction. However, when the holes 53a, 54a, and 61a1 are arranged side by side in the vertical direction relative to the mounting pieces 53 and 54 and the plate 61, the horizontal width (width in the left-right direction in FIG. 2 ) of the mounting pieces 53 and 54 and the plate 61 can be made shorter than when the holes 53a, 54a, and 61a1 are arranged side by side in the horizontal direction.

[0051] As described above, beam members 5 can be connected to each plate 61 of the joints 6 via connecting pins 7. The frame body 2 is configured to have a square shape in plan view by connecting each end of the beam members 5 to the opposing plates 61 of the four joints 6 via connecting pins 7. Furthermore, when the suspended scaffolding 1 has multiple frame bodies 2 as shown in FIG. 1, adjacent frame bodies 2, 2 in the depth direction or width direction share one beam member 5 located in the center of the frame bodies 2, 2 and joints 6 connected to both ends of this beam member 5 via connecting pins 7.

[0052] In this embodiment, the lower part of the chain 4 is connected to each joint 6 via a stopper 8. Specifically, the chain 4 is formed by stringing together a plurality of annular chain elements 4a. In the following description, the side directly facing the hole of the chain element 4a is referred to as the front side, and the width of the chain element 4a (horizontal chain element 4a) when viewed from the front side is referred to as the horizontal width, and the width of the chain element 4a (vertical chain element 4a) when viewed from the side side is referred to as the vertical width.

[0053] The stopper 8 is disk-shaped and has a notch 8a that is narrower than the horizontal width of the chain element 4a but wider than the vertical width of the chain element 4a. As shown in FIG. 5 , the stopper 8 is positioned so that the notch 8a faces the vertical chain element 4a located below the bottom end of the cylindrical body 60 of the chain 4 inserted through the cylindrical body 60 of the joint 6. Then, the stopper 8 is moved horizontally toward the chain 4, inserting the vertical chain element 4a into the notch 8a. The stopper 8 is then sandwiched between the two horizontal chain elements 4a, 4a. Because the width of the notch 8a is narrower than the width of the horizontal chain element 4a (the horizontal width of the chain element 4a), the notch 8a does not allow the horizontal chain element 4a to pass through. Therefore, when the vertical chain element 4a is inserted into the notch 8a of the stopper 8, the vertical movement of the stopper 8 relative to the chain 4 is restricted.

[0054] When the stopper 8 is suspended by the chain 4, the cylindrical body 60 is supported from below by the stopper 8, so that the frame body 2 can be suspended by the chain 4. Therefore, the lower part of the chain 4 is connected to the joint 6 via the stopper 8.

[0055] The upper ends of the chains 4 are connected to a building, structure, or the like, and the scaffolding body 10 is suspended and supported by the building, structure, or the like via multiple chains 4. However, the configuration of the stoppers 8 described above is only an example, and the configuration of the stoppers 8 is not particularly limited as long as the chains 4 can be attached to the joints 6. Furthermore, the number of chains 4 can be any number depending on the size and supporting load of the scaffolding body 10, and it is not necessary to connect the chains 4 to all of the joints 6. Furthermore, the means for connecting the chains 4 to the scaffolding body 10 is not particularly limited, and the chains 4 may be connected to parts other than the joints 6, for example, to beam members 5.

[0056] Next, a method for assembling the suspended scaffolding 1 of this embodiment will be described in detail. First, beam members 5 and joints 6 are connected with connecting pins 7 as described above to assemble multiple frame bodies 2, and a work platform 3 is placed on each frame body 2, and the scaffolding main body 10 is assembled on the ground. Then, chains 4, the upper ends of which are connected to a building, structure, etc., are connected via stoppers 8 to each joint 6 of the scaffolding main body 10 assembled on the ground (hereinafter referred to as the "existing scaffolding main body 10"), and the chains 4 are lifted with heavy machinery or a chain block and fixed to the building or structure, thereby suspending the existing scaffolding main body 10 from the building, structure, etc., as shown in Figure 1.

[0057] Next, a method for expanding the floor area of ​​a scaffolding body 10 suspended from a building or structure will be described. Hereinafter, components attached to an existing scaffolding body 10 will be described with the prefix "expansion." First, as shown in FIG. 7 , one end of the upper beam 50 of the expansion beam 5 is inserted vertically into a recess 61c formed at the upper end of a plate 61 of a joint 6 located at the rear side of the existing scaffolding body 10, which is the side where the floor area is to be expanded in the depth direction. Then, as shown by the solid line in FIG. 8 , while supporting the other end of the expansion beam 5 via a support such as a rope (not shown) attached to the other end of the expansion beam 5, the worker slowly unwinds the support around one end of the upper beam 50 as a fulcrum, thereby rotating the other end of the upper beam 50 toward the rear and gradually lowering the expansion beam 5. The support used by the worker to support the expansion beam 5 may be something other than a rope, such as a belt, chain, or a small crane.

[0058] Here, because the width of the recess 61c is wider than the vertical height of the upper beam member 50, one end of the upper beam member 50 can be inserted into the recess 61c in a vertical orientation, and a gap is formed between the one end of the upper beam member 50 and the side wall of the recess 61c (the protrusion 61b and the cylindrical body 60), as shown in Fig. 7. Then, by allowing the upper beam member 50 to be oriented in the vertical direction, the orientation of the upper beam member 50 is stabilized within the recess 61c, and the formation of a gap between the one end of the upper beam member 50 and the side wall of the recess 61c (the protrusion 61b and the cylindrical body 60) allows the upper beam member 50 to rotate toward the rear, so that the operation of tilting the expansion beam member 5 in a vertical orientation toward the rear can be performed safely and easily.

[0059] Note that the "vertical orientation" of the upper beam member 50 when inserting one end of the upper beam member 50 into the recess 61c described above includes not only an orientation along the vertical direction but also an orientation tilted toward the rear. Therefore, the upper beam member 50 may be initially tilted toward the rear, and a corner of one end of the upper beam member 50 may be inserted into the recess 61c. In this way, when a corner of one end of the upper beam member 50 that is initially tilted toward the rear is inserted into the recess 61c, the width of the recess 61c may be narrower than the vertical height of the upper beam member 50, as long as the width of the recess 61c allows for the insertion of the corner of one end of the upper beam member 50.

[0060] Furthermore, as shown by the solid lines in FIG. 8 , when the expansion beam member 5 is tilted toward the rear, a corner of one end of the upper beam member 50 fits into the recess 61c, and the outer periphery of the one end abuts the corner of the upper end of the protrusion 61b, which is the rear side wall of the recess 61c. In other words, the expansion beam member 5 tilts toward the rear while being supported by the upper end of the plate 61. In this way, when the expansion beam member 5 is tilted toward the rear, one end of the expansion beam member 5 is supported by the joint 6, so the expansion beam member 5 can be safely tilted toward the rear. Furthermore, when the beam member 5 is tilted toward the rear, one end of the upper beam member 50 is supported in the recess 61c until the beam member 5 assumes a horizontal position, so that one end of the upper beam member 50 is prevented from sliding along the top surface of the plate 61.

[0061] Then, when the upper beam member 50 of the expansion beam member 5 is tilted until its axial direction is horizontal (sideways), as shown by the dashed line in Figure 8, the lower end of the upper beam member 50 is supported by the upper end of the protrusion 61b, and the plate 61 is fitted between the one-end side mounting pieces 53, 53, so that the pin hole 53a of the one-end side mounting piece 53 faces the insertion hole 61a1 of the plate 61.

[0062] Here, the upper end of the protrusion 61b, which is the upper end of the plate 61, is located lower than the upper end of the cylindrical body 60. Therefore, when the upper beam member 50 of the expansion beam member 5 is in a horizontal position, as shown by the dashed line in FIG. 8, the end portion on one end side (right side in the figure) of the upper beam member 50 faces the outer periphery of the cylindrical body 60, so that by abutting the end portion of the upper beam member 50 against the outer periphery of the cylindrical body 60, the expansion beam member 5 can be positioned in the extension direction of the plate 61 (left-right direction in the figure). Note that the height difference between the upper end of the protrusion 61b and the upper end of the cylindrical body 60 only needs to be such that the end portion of the upper beam member 50 can be hooked onto the cylindrical body 60, and may be equal to or less than the vertical height of the upper beam member 50. However, if it is not necessary to position the expansion beam member 5 in the extension direction of the plate 61, the upper end of the protrusion 61b may be located higher than the upper end of the cylindrical body 60.

[0063] As described above, the pair of one-end mounting pieces 53, 53 are bridged vertically between the upper beam member 50 and the lower beam member 51, and the lower part of the gap between the one-end mounting pieces 53, 53 is blocked by the lower beam member 51. Therefore, when the upper beam member 50 of the expansion beam member 5 is in a horizontal position, the lower beam member 51 abuts against the lower end of the plate 61, preventing the upper beam member 50 of the expansion beam member 5 from falling any further. Therefore, the expansion beam member 5 can be positioned at a position where the pin hole 53a of the one-end mounting piece 53 and the insertion hole 61a1 of the plate 61 face each other.

[0064] Furthermore, if the pair of one-end mounting pieces 53, 53 is bridged across the upper beam 50 and the lower beam 51 in this way, when the expansion beam member 5 is tilted toward the rear and the plate 61 is fitted between the one-end mounting pieces 53, 53, a point on one edge of the lower beam 51 on the upper beam 50 side passes very close to the plate 61. If the plate 61 is on the path along which the point on the upper beam 50 side of the one edge of the lower beam 51 passes, the lower beam 51 will interfere with the plate 61, making it impossible to properly insert the plate 61 between the one-end mounting pieces 53, 53.

[0065] Therefore, the plate 61 in this embodiment is provided with a relief portion 61a2 formed by cutting out the lower side opposite the cylinder body side to avoid interference with the lower beam member 51. Therefore, even if the pair of one-end mounting pieces 53, 53 is bridged across the upper beam member 50 and the lower beam member 51, when the expansion beam member 5 is tilted toward the rear side and the plate 61 is fitted between the one-end mounting pieces 53, 53, the lower beam member 51 of the expansion beam member 5 does not interfere with the plate 61, and the plate 61 can be smoothly inserted between the one-end mounting pieces 53, 53.

[0066] In the present embodiment, the relief portion 61a2 is formed by cutting the plate main body 61a obliquely, but the shape of the cutout is not particularly limited, and for example, the relief portion 61a2 may be formed by cutting the plate main body 61a in an R-shape or a C-shape. However, when the relief portion 61a2 is formed by cutting the plate main body 61a obliquely, processing is easier than when the plate main body 61a is cut out in an R-shape, and the area of ​​the cutout in the plate main body 61a is smaller than when the plate main body 61a is cut out in a C-shape, so a decrease in the strength of the plate 61 can be suppressed.

[0067] Furthermore, when the expansion beam member 5 is tilted toward the rear and the plate 61 is fitted between the one-end mounting pieces 53, 53, the means for preventing the lower beam member 51 from interfering with the plate 61 is not limited to the method of providing the relief portion 61a2 on the anti-tubular side of the plate main body 61a. For example, the vertical length of the plate 61 may be shortened to an extent that the lower beam member 51 does not interfere, or the vertical distance between the upper beam member 50 and the lower beam member 51 may be increased to an extent that the lower beam member 51 does not interfere. However, shortening the vertical length of the plate 61 results in a decrease in the strength of the plate 61, and increasing the vertical distance between the upper beam member 50 and the lower beam member 51 increases the vertical height of the beam member 5, resulting in an increase in the size and weight of the beam member 5.

[0068] In contrast, in the present embodiment, when a recess 61a2 is provided on the counter-tube side of the plate main body 61a to prevent the lower beam material 51 from interfering with the plate 61, there is no need to change the vertical length of the plate 61 or the vertical spacing between the upper beam material 50 and the lower beam material 51, so it is possible to avoid an increase in the weight of the beam material 5 while preventing a decrease in the strength of the plate 61.

[0069] Furthermore, in this embodiment, one end of the expansion beam member 5 is inserted into the recess 61c in a vertical orientation, but the other end of the expansion beam member 5 may be inserted into the recess 61c of the plate 61 in a vertical orientation, and the expansion beam member 5 may be tilted toward the rear to fit the plate 61 between the other-end mounting pieces 54. In this case, since the sides of the pair of other-end mounting pieces 54 are connected to the other end of the lower beam member 51, even if the plate 61 does not have the relief portion 61a2, the lower beam member 51 will not interfere with the plate 61 when the expansion beam member 5 is tilted toward the rear to fit the plate 61 between the other-end mounting pieces 54.

[0070] Furthermore, the above-mentioned process of inserting one end of the upper beam 50 into the recess 61c of the plate 61 in an aligned vertical position, and the process of rotating the other end of the upper beam 50 toward the back and tilting it down while one end of the upper beam 50 is inserted into the recess 61c, and fitting the plate 61 between the mounting pieces 53, 53 on one end of the upper beam 50, can all be performed by using supports without the worker leaning out from the work floor 3 of the existing scaffolding main body 10.

[0071] Thereafter, with the upper beam member 50 of the expansion beam member 5 in a horizontal position, the connecting pin 7 is inserted into the pin hole 53a of the one-end side mounting piece 53 and the insertion hole 61a1 of the plate 61, which face each other, to connect the beam member 5 to the plate 61 of the joint 6. Here, since the plate 61 of the joint 6 is located very close to the work floor 3 of the existing scaffolding main body 10, the worker can insert the connecting pin 7 into the pin hole 53a of the one-end side mounting piece 53 and the insertion hole 61a1 of the plate 61 without leaning out from the work floor 3.

[0072] As described above, according to the above method, when connecting an expansion beam member 5 to a joint 6 located at the far end in the depth direction of the existing scaffolding main body 10, the worker does not need to lean out from the work floor 3 of the existing scaffolding main body 10, so the expansion work of the floor area of ​​the scaffolding main body 10 can be carried out safely.

[0073] Next, the same procedure is used to connect the expansion beam member 5 to the joint 6 adjacent in the width direction to the joint 6 to which the expansion beam member 5 is connected. As a result, as shown in Fig. 9, the two expansion beam members 5, 5 extending in the depth direction are arranged in parallel.

[0074] Next, as shown in Figure 10, multiple expansion scaffolding boards 3a are hung between two expansion beam members 5, 5 arranged in parallel, and the work platform 3 is installed. Thereafter, as shown in Figure 11, an expansion joint 6 is attached to each of the attachment pieces 54, 54 at the other end of the two expansion beam members 5. Specifically, the expansion joint 6 is connected via a stopper 8 to a chain 4 that has been hung in advance from a building or structure, and then the expansion joint 6 is attached to the attachment piece 54 at the other end of the expansion beam member 5 via a connecting pin 7. This means that the worker does not need to lean over from the work platform 3 to attach the chain 4 to the expansion joint 6.

[0075] Finally, each end of the expansion beam member 5 extending along the width direction is connected via a connecting pin 7 to the expansion joints 6, 6 attached to the mounting pieces 54, 54 on the other end side of the two expansion beam members 5 arranged in parallel. Even during these operations, the worker does not need to lean out from the work platform 3, so the work of expanding the floor area of ​​the scaffolding main body 10 can be carried out safely.

[0076] By repeating the above procedure in the depth direction or width direction, the suspended scaffolding 1 of this embodiment is capable of expanding the floor area of ​​the scaffolding main body 10 to any position while suspended and supported from a building, structure, etc. Note that the above-described method of assembling the suspended scaffolding 1 is an example and is not limited to the above-described method.

[0077] Alternatively, two existing scaffolding bodies 10 may be assembled simultaneously in mid-air, and an expansion beam member 5 may be hung between the opposing joints 6 of the two existing scaffolding bodies 10, 10 to connect the two existing scaffolding bodies 10 in mid-air to assemble a single suspended scaffolding 1. Specifically, as shown in FIG. 12 , one end of the upper beam member 50 of the expansion beam member 5 is inserted into the recess 61c of the plate 61 of the joint 6 of one of the two existing scaffolding bodies 10 on the right side of the figure in a vertically upright position, and then the upper beam member 5 is tilted down toward the joint 6 of the other scaffolding body 10 on the left side of the figure. Here, as described above, the sides of the pair of other-end mounting pieces 54, 54 provided on the other end of the beam member 5 in this embodiment are connected to the other end of the lower beam member 51, so that the lower part of the gap between the other-end mounting pieces 54, 54 is open. Therefore, when the upper beam member 50 of the expansion beam member 5 is tilted toward the other scaffolding body 10, the upper beam member 50 of the expansion beam member 5 covers and abuts against the upper end of the plate 61 of the joint 6 of the other scaffolding body 10 from above, and the plate 61 is fitted between the other end side mounting pieces 54, 54. Thereafter, by connecting the ends of the expansion beam member 5 to each joint 6 from above the work floors 3 of both scaffolding bodies 10, 10 via connecting pins 7, it is possible to connect the expansion beam member 5 between the joint 6 of one scaffolding body 10 and the joint 6 of the other scaffolding body 10 by bridging them.

[0078] Then, although not shown, the two scaffolding bodies 10 can be connected in midair by suspending an expansion beam member 5 between each of the two parallel joints 6, 6 of one scaffolding body 10 and the two parallel joints 6, 6 of the other scaffolding body 10 in the above-described procedure, and suspending multiple scaffolding boards 3a between the two expansion beam members 5, 5 to install the work platform 3. In this way, by connecting two scaffolding bodies 10, 10 in midair to assemble one suspended scaffolding 1, a suspended scaffolding 1 with a large floor board area can be assembled in a short time.

[0079] In this embodiment, the gap between the other-end mounting pieces 54, 54 provided on the other end of the beam member 5 is open at the bottom so that an expansion beam member 5 can be hung between the joints 6, 6 of the two scaffolding bodies 10, 10, but if use for such an application is not anticipated, the gap between the other-end mounting pieces 54, 54 may be closed by the lower beam member 51, just like the gap between the one-end mounting pieces 53, 53. In this way, the structure of one end and the other end of the beam member 5 will be the same, preventing assembly errors from occurring.

[0080] As described above, the suspended scaffolding 1 of this embodiment comprises a scaffolding body 10 having a plurality of beam members 5 arranged in parallel, joints 6 connected to the ends of the beam members 5 by connecting members, and a work platform 3 installed between the beam members 5, 5, and a chain 4 (hanging member) that suspends the scaffolding body 10, and the beam member 5 has an upper beam member 50 (beam member) and a pair of mounting pieces 53, 53, 54, 54 that are respectively provided at the lower ends of each end of the upper beam member 50 and arranged side by side when viewed from the axial direction, and each having pin holes 53a (54a) facing each other, and the joint 6 is a cylindrical member whose axis is along the vertical direction. 60, and a plurality of plates 61 arranged at predetermined intervals in the circumferential direction on the outer periphery of the cylindrical body 60 and capable of being fitted between the mounting pieces 53, 53, 54, 54 along the axial direction of the cylindrical body 60, the plates 61 having recesses 61c formed at the upper ends and insertion holes 61a1 facing the pin holes 53a, 54a of the mounting pieces 53, 53, 54, 54 when fitted between the mounting pieces 53, 53, 54, 54, the connecting members being connecting pins 7 inserted into the opposing pin holes 53a, 54a and the insertion holes 61a1 when the plate 61 is fitted between the mounting pieces 53, 53, 54, 54.

[0081] With the suspended scaffolding 1 configured in this manner, the beam member 5 does not have beams arranged side by side, resulting in a compact structure. Then, with one end of the upper beam member 50 of the beam member 5 standing upright and inserted into the recess 61c in a vertical orientation, the other end of the upper beam member 50 is rotated toward the back using one end of the upper beam member 50 as a fulcrum, and the plate 61 is fitted between the one-end mounting pieces 53, 53 of the upper beam member 50. The connecting pin 7 is inserted into the pin holes 53a, 53a of the opposing one-end mounting pieces 53, 53 and the insertion hole 61a1 of the plate 61, thereby connecting the beam member 5 to the joint 6.

[0082] In such work of connecting beam members 5, there is no need for the worker to lean out from the work platform 3 of the scaffolding main body 10 that is suspended and supported from a building, structure, etc. Therefore, in the suspended scaffolding 1 of this embodiment, the beam members 5 can be configured compactly, and the work of connecting the beam members 5 to the joints 6 of the scaffolding main body 10 can be carried out safely.

[0083] Furthermore, when one end of the upper beam member 50 is inserted into the recess 61c, one end of the upper beam member 50 can be supported by the joint 6 when the beam member 5 is tilted toward the rear. Therefore, when the beam member 5 is tilted toward the rear, one end of the beam member 5 is supported by the joint 6, so the beam member 5 can be tilted toward the rear safely, and the work of connecting the beam member 5 to the joint 6 of the scaffolding main body 10 can be performed safely and easily.

[0084] Furthermore, when the beam member 5 is tilted toward the rear, one end of the upper beam member 50 is supported within the recess 61c until the beam member 5 assumes a horizontal position, thereby preventing the end of the upper beam member 50 from sliding along the top surface of the plate 61, and making it safe and easy to connect the beam member 5 to the joint 6 of the scaffolding main body 10.

[0085] In this embodiment, four plates 61 are arranged at 90-degree intervals around the outer periphery of the cylindrical body 60 of the joint 6, but the number of plates 61 may be determined appropriately depending on the number of beam members 5 connected to the joint 6, and is not particularly limited as long as it is two or more. In addition, the arrangement intervals of the multiple plates 61 may be determined appropriately depending on the shape of the frame body 2 that constitutes the scaffolding main body 10.

[0086] Furthermore, in the suspended scaffolding 1 of this embodiment, the width of the recess 61c is wider than the vertical height of the upper beam 50. With the suspended scaffolding 1 configured in this manner, one end of the upper beam 50 can be inserted into the recess 61c in a vertical orientation, and a gap is created between one end of the upper beam 50 and the side wall of the recess 61c. This stabilizes the orientation of the upper beam 50 within the recess 61c by allowing the upper beam 50 to be oriented vertically, and the gap between one end of the upper beam 50 and the side wall of the recess 61c allows the upper beam 50 to rotate toward the rear, thereby safely and easily tilting the beam member 50 in a vertical orientation toward the rear. The width of the recess 61c may be narrower than the vertical height of the upper beam 50, as long as it allows for the insertion of a corner of one end of the upper beam 50.

[0087] Furthermore, in the suspended scaffolding 1 of this embodiment, the upper end of the plate 61 is located lower than the upper end of the cylindrical body 60. In the suspended scaffolding 1 configured in this manner, the end on one end of the upper beam member 50 in a horizontal position faces the outer periphery of the cylindrical body 60, so by abutting the end of the upper beam member 50 against the outer periphery of the cylindrical body 60, the beam member 5 can be positioned in the extension direction of the plate 61. This makes it easy to align the pin holes 53a, 53a, 54a, 54a of the mounting pieces 53, 54 with the insertion hole 61a1. However, the upper end of the plate 61 may be located higher than the upper end of the cylindrical body 60.

[0088] In addition, in the suspended scaffolding 1 of this embodiment, the beam member 5 has a lower beam member 51 that is arranged in line below the upper beam member 50 and extends parallel to the upper beam member 50, and a pair of one-end side mounting pieces (mounting pieces) 53, 53 are spanned vertically between the upper beam member 50 and the lower beam member 51.

[0089] In the suspended scaffolding 1 configured in this manner, the lower part of the gap between the one-end mounting pieces 53, 53 is blocked by the lower beam 51, so that when one end of the upper beam 50 is inserted into the recess 61c in a vertical orientation with one end facing downward and the upper beam 50 is tilted sideways, the lower beam 51 abuts against the lower end of the plate 61, preventing the upper beam 50 of the beam member 5 from tilting any further, and therefore the beam member 5 can be positioned so that the pin hole 53a of the one-end mounting piece 53 faces the insertion hole 61a1 of the plate 61. This makes it easy to connect the beam member 5 to the plate 61 of the joint 6.

[0090] Furthermore, in the suspended scaffolding 1 of this embodiment, the plate 61 has a relief portion 61a2 formed by cutting out the lower side of the plate 61 on the side opposite the cylinder body. In the suspended scaffolding 1 configured in this manner, even if the pair of one-end mounting pieces 53, 53 is bridged across the upper beam member 50 and the lower beam member 51, when the beam member 5 is tilted toward the rear side and the plate 61 is fitted between the one-end mounting pieces 53, 53, the lower beam member 51 of the beam member 5 does not interfere with the plate 61, and the plate 61 can be smoothly inserted between the one-end mounting pieces 53, 53.

[0091] Furthermore, compared to shortening the vertical length of plate 61 or increasing the vertical distance between upper beam material 50 and lower beam material 51 to avoid interference between the lower beam material 51 of beam member 5 and plate 61, when cutting out the lower side of plate 61 on the anti-tube side to form escape portion 61a2, there is no need to change the vertical length of plate 61 or the vertical distance between upper beam material 50 and lower beam material 51, so an increase in the weight of beam member 5 can be avoided while preventing a decrease in the strength of plate 61.

[0092] In the present embodiment, the relief portion 61a2 is formed by cutting out the plate body 61a of the plate 61 at an angle, but the shape of the cutout is not particularly limited, and for example, the relief portion 61a2 may be formed by cutting out the plate body 61a of the plate 61 in an R-shape or a C-shape. However, when the relief portion 61a2 is formed by cutting out the plate body 61a at an angle, processing is easier than when the plate body 61a is cut out in an R-shape, and the area of ​​the cutout in the plate body 61a is smaller than when the plate body 61a is cut out in a C-shape, so a decrease in the strength of the plate 61 can be suppressed.

[0093] Furthermore, in the suspended scaffolding 1 of this embodiment, the beam member 5 has a lower beam member 51 that is arranged below the upper beam member 50 and extends parallel to the upper beam member 50, and the sides of a pair of other-end mounting pieces (mounting pieces) 54, 54 are connected to the other end (end) of the lower beam member 51. In the suspended scaffolding 1 configured in this manner, if the other end of the beam member 5 is inserted into the recess 61c of the plate 61 in an orientation along the vertical direction, and the beam member 5 is tilted toward the rear to fit the plate 61 between the other-end mounting pieces 54, 54, the lower beam member 51 does not interfere with the plate 61 even without providing the relief portion 61a2 in the plate 61. Therefore, there is no need to process the plate 61 to provide the relief portion 61a2, and therefore the reduction in the area of ​​the plate 61 can be suppressed, and a reduction in the strength of the plate 61 can be prevented.

[0094] Furthermore, in the suspended scaffolding 1 configured in this manner, the sides of the pair of other-end mounting pieces 54, 54 are connected to the other end of the lower beam 51, so that the lower part of the gap between the other-end mounting pieces 54, 54 is open. Therefore, one end of the upper beam 50 of the beam member 5 is inserted into the recess 61c of the plate 61 of the joint 6 of one of the two existing scaffolding bodies 10, 10 in an upright position along the vertical direction with its end facing downward, and then the other end of the upper beam 50 is tilted toward the other scaffolding body 10, and the upper beam 50 of the beam member 5 is brought into contact with the upper end of the plate 61 of the joint 6 of the other scaffolding body 10 so as to cover it from above, thereby fitting the plate 61 between the other-end mounting pieces 54, 54. Then, with the plate 61 fitted between the other end mounting pieces 54, 54, the ends of the beam member 5 can be connected to each joint 6 from the work floor 3 of both scaffolding bodies 10, 10 via connecting pins 7, thereby connecting the beam member 5 between the joint 6 of one scaffolding body 10 and the joint 6 of the other scaffolding body 10.

[0095] Therefore, in the suspended scaffolding 1 configured in this manner, the two scaffolding bodies 10, 10 can be assembled simultaneously in the air, and by spanning the beam member 5 between the mutually opposing joints 6, 6 of the two scaffolding bodies 10, 10, the two scaffolding bodies 10, 10 can be connected in the air to assemble one suspended scaffolding 1, so that a suspended scaffolding 1 with a large floor area can be assembled in a short time.

[0096] In this embodiment, the lower part of the gap between the one-end mounting pieces 53, 53 provided on one end of the beam member 5 is closed and the lower part of the gap between the other-end mounting pieces 54, 54 is open, but it is also possible to leave the lower part of the gap between the one-end mounting pieces 53, 53 open and close the lower part of the gap between the other-end mounting pieces 54, 54 with the lower beam member 51. Alternatively, it is also possible to open or close the lower parts of both the gap between the one-end mounting pieces 53, 53 and the gap between the other-end mounting pieces 54, 54. Furthermore, if the strength of the scaffolding main body 10 against the load is not insufficient, the lower beam member 51 may be omitted.

[0097] In addition, in the suspended scaffolding 1 of this embodiment, there are multiple pin holes 53a, 54a formed in the mounting pieces 53, 54 and multiple insertion holes 61a1 formed in the plate 61, and the connecting pin 7 has pin portions 70 that are the same number and arranged at equal intervals as the pin holes 53a, 54a and insertion holes 61a1 that face each other when the plate 61 is fitted between the mounting pieces 53, 53, 54, 54, and connecting portions (gripping portions 71 or regulating portions 72) that connect the pin portions 70 to each other.

[0098] In the suspended scaffolding 1 configured in this manner, the mounting pieces 53, 53, 54, 54 of the beam member 5 and the plate 61 of the joint 6 are connected at multiple points, thereby restricting the vertical rotation of the beam member 5 relative to the plate 61 and suppressing vertical rattle of the beam member 5.

[0099] Furthermore, since the connecting pin 7 has the same number of pin portions 70 as the number of pin holes 53a, 54a and insertion holes 61a1, the pin portions 70, 70 can be inserted at once into the multiple pin holes 53a, 54a and insertion holes 61a1 provided in the mounting pieces 53, 54 and the plate 61, thereby improving the efficiency of the work of connecting the beam member 5 to the joint 6 compared to inserting one pin each into the multiple pin holes 53a, 54a and insertion holes 61a1.

[0100] The number of pin holes 53a, 53a, 54a, 54a, the number of insertion holes 61a1, and the number of pin portions 70 of the connecting pin 7 may be three or more, and even in this case, the mounting pieces 53, 54 and the plate 61 are connected at multiple locations, thereby suppressing rattle in the vertical direction of the beam member 5. However, the number of pin holes 53a, 54a of the mounting pieces 53, 54 and the number of insertion holes 61a1 of the plate 61 may be one. In that case, the connecting pin may be one independent pin.

[0101] In this embodiment, the connecting pin 7 has the gripping portion 71 and the restricting portion 72 as connecting portions that connect the pin portions 70 together, but either one of these may be omitted. Alternatively, the connecting pin 7 may be formed as a plurality of independent pins, and one pin may be inserted into each of the pin holes 53a, 54a and the insertion hole 61a1.

[0102] Furthermore, the method of assembling the suspended scaffolding 1 of this embodiment includes a scaffolding body 10 having a plurality of beam members 5 arranged in parallel, a joint 6 connected to the ends of the beam members 5 by connecting members, and a work platform 3 installed between the beam members 5, 5, and a chain 4 for suspending the scaffolding body 10, wherein the beam member 5 has an upper beam member 50 and a pair of attachment pieces 53, 53, 54, 54 provided at the lower end of each end of the upper beam member 50, arranged side by side when viewed from the axial direction, and having opposing pin holes 53a, 54a formed therein, and the joint 6 has a cylindrical body 60 whose axis is along the vertical direction, and a plurality of plates 61 arranged around the outer periphery of the cylindrical body 60 at predetermined intervals in the circumferential direction and capable of fitting between the attachment pieces 53, 53, 54, 54 along the axial direction of the cylindrical body 60, and the plate 61 has a recess 61c formed in the upper part and an insertion hole 61a1 that faces the pin holes 53a, 54a of the mounting pieces 53, 53, 54, 54 when the plate 61 is fitted between the mounting pieces 53, 53, 54, 54, and the connecting member is a connecting pin 7 that is inserted into the pin holes 53a, 54a and the insertion hole 61a1 that face each other when the plate 61 is fitted between the mounting pieces 53, 53, 54, 54, The steps include a step of inserting one end of the upper beam material 50 into the recess 61c with force, a step of rotating the other end of the upper beam material 50 toward the rear while inserting the one end of the upper beam material 50 into the recess 61c, and fitting the plate 61 between the one-end mounting pieces 53, 53 on one end side of the upper beam material, and a step of inserting a connecting pin 7 into the pin hole 53a of the one-end mounting pieces 53, 53 facing each other and the insertion hole 61a1 of the plate 61.

[0103] According to this method of assembling the suspended scaffolding 1, in the steps of inserting one end of the upper beam 50 into the recess 61c in a position aligned in the vertical direction, rotating the other end of the upper beam 50 toward the back while inserting it into the recess 61c, and fitting the plate 61 between the one-end mounting pieces 53, 53 on one end of the upper beam 50, and inserting the connecting pin 7 into the pin holes 53a, 53a of the opposing one-end mounting pieces 53, 53 and the insertion hole 61a1 of the plate 61, the worker does not need to lean out from the work platform 3 of the scaffolding main body 10 that is suspended and supported on a building, structure, etc. Therefore, according to the method of assembling the suspended scaffolding 1 of this embodiment, the beam member 5 can be configured compactly and the work of connecting the beam member 5 to the joint 6 of the scaffolding main body 10 can be performed safely.

[0104] Furthermore, when one end of the upper beam member 50 is inserted into the recess 61c, one end of the upper beam member 50 can be supported by the joint 6 when the beam member 5 is tilted toward the rear. Therefore, when the beam member 5 is tilted toward the rear, one end of the beam member 5 is supported by the joint 6, so the beam member 5 can be tilted toward the rear safely, and the work of connecting the beam member 5 to the joint 6 of the scaffolding main body 10 can be performed safely and easily.

[0105] Furthermore, when the beam member 5 is tilted toward the rear, one end of the upper beam member 50 is supported by entering the recess 61c until the beam member 5 assumes a horizontal position, thereby preventing the end of the upper beam member 50 from sliding along the top surface of the plate 61, and making it safe and easy to connect the beam member 5 to the joint 6 of the scaffolding main body 10.

[0106] Although the preferred embodiment of the present invention has been described in detail above, it will be appreciated that modifications, variations and changes can be made thereto without departing from the scope of the appended claims. [Explanation of symbols]

[0107] 1···Suspended scaffolding, 2···Frame body, 3···Scaffolding plank, 4···Chain (suspension member), 5···Beam member, 6···Joint, 7···Connecting pin, 50···Upper beam member (beam member), 51···Lower beam member, 53···One end side mounting piece (mounting piece), 53a, 54a···Pin hole, 54···Other end side mounting piece (mounting piece), 60···Cylinder, 61···Plate, 61a1···Through hole, 61a2···Relief portion, 61c···Recess, 70···Pin portion, 71···Gripping portion (connection portion), 72···Regulating portion (connection portion)

Claims

1. A suspended scaffolding comprising a scaffolding body having a plurality of beam members arranged in parallel, joints connected to the ends of the beam members by connecting members, and a work platform installed between the beam members, and a hanging member that suspends the scaffolding body, The beam member includes a beam material and a pair of mounting pieces respectively provided at lower ends of each end of the beam material, arranged side by side on the left and right as viewed in the axial direction, and having pin holes facing each other, the joint includes a cylindrical body whose axis is aligned in a vertical direction, and a plurality of plates that are arranged at predetermined intervals in a circumferential direction on the outer periphery of the cylindrical body and can be fitted between the mounting pieces that are aligned in the axial direction of the cylindrical body, the plate has a recess formed at an upper end and an insertion hole that faces the pin hole of the mounting piece when the plate is fitted between the mounting pieces, The connecting member is a connecting pin that is inserted into the pin hole and the insertion hole that face each other in a state where the plate is fitted between the attachment pieces. A suspended scaffold characterized by:

2. The width of the recess is greater than the height of the beam in the vertical direction.

2. The suspended scaffolding according to claim 1 .

3. The upper end of the plate is located below the upper end of the cylinder.

2. The suspended scaffolding according to claim 1 .

4. The beam member has a lower beam member arranged below the beam member and extending parallel to the beam member, The pair of mounting pieces are vertically bridged between the beam and the lower beam.

2. The suspended scaffolding according to claim 1 .

5. The plate has a recess formed by cutting out the lower side of the plate on the side opposite to the cylinder body.

5. The suspended scaffolding according to claim 4.

6. The beam member has a lower beam member arranged below the beam member and extending parallel to the beam member, The side ends of the pair of mounting pieces are connected to the ends of the lower beam member.

2. The suspended scaffolding according to claim 1 .

7. The pin holes formed in the attachment pieces and the insertion holes formed in the plate are each plural, The connecting pin has pin portions that are the same in number as the pin holes and the insertion holes and are arranged at equal intervals when the plate is fitted between the attachment pieces, and connection portions that connect the pin portions to each other.

2. The suspended scaffolding according to claim 1 .

8. A scaffolding body having a plurality of beam members arranged in parallel, joints connected to the ends of the beam members by connecting members, and a work platform installed between the beam members; and a hanging member for hanging the scaffolding body. The beam member includes a beam material and a pair of mounting pieces respectively provided at lower ends of each end of the beam material, arranged side by side on the left and right as viewed in the axial direction, and having pin holes facing each other, the joint includes a cylindrical body whose axis is aligned in a vertical direction, and a plurality of plates that are arranged at predetermined intervals in a circumferential direction on the outer periphery of the cylindrical body and can be fitted between the mounting pieces that are aligned in the axial direction of the cylindrical body, the plate has a recess formed in an upper portion thereof and an insertion hole that faces the pin hole of the mounting piece when the plate is fitted between the mounting pieces; The connecting member is a connecting pin that is inserted into the pin hole and the insertion hole that face each other in a state where the plate is fitted between the attachment pieces. In the method of assembling suspended scaffolding, a step of inserting one end of the beam material into the recess in a position aligned in the vertical direction; a step of inserting one end of the beam material into the recess, rotating the other end of the beam material toward the back, and fitting the plate between the mounting pieces on the one end side of the beam material; and inserting the connecting pin into the pin hole of the mounting piece and the insertion hole of the plate, which are opposed to each other. A method for assembling a suspended scaffolding.

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