Suspended scaffolding and method for assembling suspended scaffolding

Abstract

The present invention aims to provide a suspended scaffolding and an assembling method for a suspended scaffolding that enables a worker to connect a beam member to a joint of a scaffolding main body while configuring the beam member compactly without leaning out. [Solution] The scaffolding body has a number 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 floor installed between the beam members 5, and the beam members 5 have a pair of left and right mounting pieces 53, 53 provided at the lower end of each end of the upper beam member 50 and having pin holes 53a formed therein, the joint 6 has a number of plates 61 provided circumferentially on the outer periphery of the cylindrical body 60, the plate 61 has a recess 61c formed at the upper end and an insertion hole that faces the pin hole when fitted between the mounting pieces 53, 53, and the connecting member is a connecting pin 7 that is inserted into the opposing pin holes and insertion holes when the plate 61 is fitted between the mounting pieces 53, 53.

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 includes multiple beam members arranged parallel to each other and a scaffolding panel that is spanned between the beam members. The beam members are configured in a truss shape with four beam members arranged in a line up and down and left and right and extending parallel to each other, and multiple diagonal members that are spanned between the upper and lower beam members.

[0004] However, in the suspended scaffolding configured in this way, the beam members are large, including four beam members and multiple diagonal members, so the entire suspended scaffolding becomes large in size. Therefore, it is difficult to install the suspended scaffolding of Patent Document 1 in a place surrounded by many obstacles.

[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 to include a pair of upper and lower beam members, a bundle member connecting the upper beam member and the lower beam member, and a pair of left and right plate members provided between the ends of the upper beam member and the lower beam member when viewed from the axial direction. Therefore, in the beam members of the suspended scaffolding of Patent Document 2, the beam members are not arranged side by side in the horizontal direction, so the structure of the beam members is compact. If the structure of the beam members is compact in this way, the suspended scaffolding can be installed even in places where there are many obstacles around.

[0006] In addition, in the suspended scaffolding of Patent Document 2, the plates of the joint, which has a cylinder whose axis runs vertically and a number of plates arranged circumferentially at predetermined intervals around the outer periphery of the cylinder, 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 protruding 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 configured in this manner, new beam members are connected to each joint arranged side by side, and a work floor is installed between adjacent beam members, making it possible to expand the floor area of ​​the suspended scaffolding while it is suspended from a building, structure, etc.

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

[0010] In this way, in order to connect a beam member to a joint of a conventional suspended scaffolding while it is 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 boards directly facing the plate of the joint, and pull the beam member toward the joint and insert the plate between the boards.

[0011] Therefore, the present invention aims to provide a suspended scaffolding and an assembling method for a suspended scaffolding that enables a worker to safely and easily connect beam members to joints without leaning out from the work platform while configuring the beam members compactly. [Means for solving the problem]

[0012] In order to achieve the above object, the 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 floor installed between the beam members, and a hanging member for suspending the scaffolding body, the beam members having a beam material and a pair of mounting pieces respectively provided at the lower ends of each end of the beam material, arranged side by side when viewed from the axial direction, and having pin holes facing each other, the joint having a cylindrical body whose axis runs along the vertical direction, and a plurality of plates arranged around the outer periphery of the cylindrical body at a predetermined interval in the circumferential direction and capable of fitting between the mounting pieces along the axial direction of the cylindrical body, the plates having a recess formed at the upper end, a protruding portion forming a side wall of the recess on the side opposite to the cylinder body; The plate has an insertion hole that faces the pin hole of the mounting piece when the plate is fitted between the mounting pieces, and the connecting member is a connecting pin that is inserted into the pin hole and the insertion hole that face each other when the plate is fitted between the mounting pieces, The beam has a corner at the bottom of one end and extends in the direction of the plate from the cylinder. The width of the recess before Beam material The above The width is wide enough to allow the insertion of the corner. The upper end of the protrusion on the concave side functions as a fulcrum for the rotation of the beam material with the corner inserted into the concave toward the opposite side of the cylinder. According to this configuration, the beam member does not have beam members arranged side by side, so that the structure is compact. Then, one end of the beam member is placed downward and inserted into the recess in a vertical orientation, and the other end of the beam member is rotated toward the back side with the one end of the beam member as a fulcrum, and the plate is fitted between the mounting pieces on the one end side of the beam member, and the connecting pin is inserted into the pin holes of the opposing mounting pieces and the insertion hole of the plate, so that the beam member can be connected to the joint. In such a beam member connecting operation, the worker does not need to lean out from the work floor of the scaffolding body that is suspended and supported by a building or structure. Therefore, the beam member can be safely connected to the joint of the scaffolding body while being configured compactly.

[0013] In addition, the present invention other Hanging leg The place is , The scaffolding body has a plurality of beam members arranged in parallel, joints connected to the ends of the beam members by connecting members, and a work floor installed between the beam members, and a hanging member for suspending the scaffolding body, the beam members having a beam member and a pair of mounting pieces respectively provided at the lower ends of each end of the beam members, arranged side by side when viewed from the axial direction, and having opposing pin holes formed therein, the joint having a cylindrical body whose axis runs along the vertical direction, and a plurality of plates arranged around the outer periphery of the cylindrical body at a predetermined interval in the circumferential direction and capable of being fitted 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, the connecting members being connecting pins that are inserted into the opposing pin holes and insertion holes when the plate is fitted between the mounting pieces, and extending in the direction of extension of the plate from the cylindrical body. The width of the recess is wider than the vertical height of the beam. It is characterized by . According to this configuration, the beam member does not have beam members arranged side by side, and therefore has 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 side using the one end of the beam member as a fulcrum, and a plate is fitted between the mounting pieces on the one end side of the beam member, and a connecting pin is inserted into the pin holes of the opposing mounting pieces and the insertion hole of the plate, thereby connecting the beam member to the joint. In such a connection operation of the beam members, the worker does not need to lean out from the work floor of the scaffolding main body that is suspended and supported on a building, structure, etc. Therefore, the beam member can be safely connected to the joint of the scaffolding main body while being configured compactly. Furthermore, According to 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. Then, the beam can be oriented in the vertical position, which stabilizes the position of the beam within the recess, 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, so that the operation of tilting the vertically oriented beam toward the rear can be performed safely and easily.

[0014] In addition, in the suspended scaffolding of the present invention, the upper end of the plate may be located lower than the upper end of the cylinder. With this configuration, the end of one end of the beam in the horizontal position faces the outer periphery of the cylinder, so that the beam can be positioned in the extension direction of the plate by abutting the end of the beam against the outer periphery of the cylinder. Therefore, it is easy to align the pin hole of the mounting piece with the insertion hole.

[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 vertically spanned 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, so that when the beam member is inserted into the recess in a vertical orientation and tilted to a horizontal orientation, the lower beam member abuts against the lower end of the plate, preventing the beam member of the beam member from tilting further, and the beam member can be positioned at a position where the pin hole of the mounting piece faces the insertion hole of the plate. This makes it easier to connect the beam member to the plate of the joint.

[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 opposite side to the cylinder body. With this configuration, even if a pair of mounting pieces are spanned between the beam and the lower beam, when the beam is tilted to the rear side 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 in order to avoid the lower beam of the beam interfering with the plate, so that it is possible to prevent a decrease in the strength of the plate while avoiding an increase in the weight of the beam.

[0017] 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 sides of the pair of mounting pieces may be connected to the ends of the lower beam member. According to this configuration, when the beam member is tilted to the rear side and the plate is fitted between the mounting pieces while the ends of the beam member are inserted into the recesses of the plate in a vertical orientation, the lower beam member does not interfere with the plate. Therefore, since there is no need to process the plate, it is possible to suppress a decrease in the area of ​​the plate and prevent a decrease in the strength of the plate. Furthermore, according to this configuration, since 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 are assembled simultaneously in the air, and the beam member is hung between the joints of the two scaffolding bodies facing each other, so that the two scaffolding bodies can be connected in the air to assemble one suspended scaffolding, and a suspended scaffolding with a large floor board area can 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 in 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. According to this configuration, the mounting pieces of the beam member and the plates of the joint are connected at multiple points, so that the vertical rotation of the beam member relative to the plates is restricted, and the vertical rattling of the beam member is suppressed. Furthermore, since 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, so that the efficiency of the work of connecting the beam member to the joint is improved compared to the case of inserting pins one by one into the multiple pin holes and insertion holes.

[0019] Furthermore, the method of assembling a suspended scaffold of the present invention includes 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 suspending the scaffolding body, the beam members having a beam member and a pair of mounting pieces respectively provided at the lower ends of each end of the beam members, arranged side by side when viewed from the axial direction, and having pin holes facing each other, and the joint having a cylindrical body whose axis runs along the vertical direction, and a plurality of plates arranged around the outer periphery of the cylindrical body at predetermined intervals in the circumferential direction and capable of fitting between the mounting pieces along the axial direction of the cylindrical body, The plate has a recess formed in the upper part 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.The method for assembling a suspended scaffolding includes 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 rear with one end of the beam inserted into the recess and tilting it down while fitting the plate between the mounting pieces on the one end side of the beam; and inserting the connecting pin into the opposing pin holes of the mounting pieces and the insertion hole of the plate. According to this assembly method, in the process of inserting one end of the beam into the recess in a vertically aligned position, the process of rotating the other end of the beam toward the back and tilting it down with one end of the beam inserted into the recess while fitting a plate between the mounting pieces on one end of the beam, and the process of inserting connecting pins into the pin holes of the opposing mounting pieces and the insertion hole of the plate, the worker does not need to lean out from the work floor of the scaffolding main body that is suspended and supported on a building, structure, etc. Therefore, according to this method of assembling a suspended scaffolding, the beam member can be configured compactly and the work of connecting the beam member to the joint of the scaffolding main body can be safely performed. Effect of the Invention

[0020] According to the suspended scaffolding and the method for 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 performed safely and easily. [Brief description of the drawings]

[0021] [Figure 1]FIG. 1 is a perspective view showing a suspended scaffolding according to the present embodiment. [Diagram 2] 1 is a side view of a beam member according to the present embodiment. [Diagram 3] FIG. 2 is a front view of the beam member of the present embodiment, viewed from one end side. [Figure 4] FIG. 2 is a perspective view of the joint of the present embodiment. [Diagram 5] 4 is an enlarged side view showing a connection portion between a joint and a beam member in the present embodiment. FIG. [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 a recess in the plate of the joint with the end aligned in the vertical direction. [Figure 8] This is a diagram explaining 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 rear and tilting it down. [Figure 9] FIG. 13 is a diagram for explaining a method of assembling the suspended scaffolding of this embodiment, showing the process of arranging two beam members extending in the depth direction in parallel. [Figure 10] FIG. 2 is a diagram for explaining 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 is a diagram explaining 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. 13 is a diagram for explaining a method for assembling a suspended scaffolding according to another embodiment, showing a process of suspending a beam member between the joints of two suspended scaffoldings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

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

[0024] In this embodiment, as shown in FIG. 1, the scaffolding 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 floor 3 consisting of a plurality of scaffolding boards 3a that are spanned between the beam members 5, 5 of each frame body 2, and each frame body 2 is connected and arranged in the depth direction and width direction, respectively. In FIG. 1, the work floors 3 installed on some of the frame bodies 2 are omitted in order to make it easier to understand the structure of the scaffolding body 10. In addition, 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 arbitrarily determined according to the floor area of ​​the scaffolding body 10, and the number of frame bodies 2 may be one. In addition, the suspension material that suspends the scaffolding 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 square shape in a 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 that are connected to the ends of each beam member 5 by connecting pins 7 as connecting members described later and connect the ends of each beam member 5, and the frame bodies 2 adjacent to each other in the depth direction and width direction share one central beam member 5 and the joints 6 connected to both ends of the beam member 5. 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, but when the two beam members 5,5 arranged in parallel along the depth direction are connected by the work floor 3 to function as a structure, the two beam members 5,5 arranged in parallel along the width direction may be omitted. In addition, the shape of the frame body 2 may be a shape other than a square in a plan view, for example, a rectangle or a parallelogram.

[0026] 2 and 3, the beam member 5 includes a pair of upper and lower beam members 50, 51, a plurality of bundle members 52 that are bridged between the upper beam member 50 and the lower beam member 51 and connect the beam members 50, 51, and a pair of left and right mounting pieces 53, 53, 54, 54 that are flat and extend vertically from the lower part of each end of the upper beam member 50 and are viewed from the axial direction. As described above, 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 51 is provided with pin-shaped fixing portions 51a, 51a protruding upward from two upper portions on the left and right sides 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 beams 51, 51 facing each other in the depth direction or width direction in the frame body 2 with a brace material (not shown). However, if the strength of the frame body 2 is sufficient without the brace material, the fixing portions 51a for installing the brace material may be omitted.

[0028] Moreover, the mounting pieces 53 and 54 have the same structure except for some parts. Specifically, in each of the mounting pieces 53 and 54, two pin holes 53a, 53a, 54a, 54a are formed so as to be aligned along the up-down direction and face each other in the left-right direction when viewed from the axial direction of the beam member 5. In this embodiment, the upper beam material 50 and the lower beam material 51 are formed in a cylindrical shape, but they may have a shape other than a cylindrical shape, for example, a square tube shape.

[0029] 2 and 3, in this embodiment, the mounting piece 53 (hereinafter referred to as the "one-end mounting piece 53") provided on the right side in FIG. 2, which is one end side of the beam member 5, is bridged between the lower part of the upper beam member 50 and the upper part of the lower beam member 51, and the upper end and the lower end are 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 mounting pieces 53, 53 is blocked by the lower beam member 51. On the other hand, the mounting piece 54 (hereinafter referred to as the "other-end mounting piece 54") provided on the left side in FIG. 2, which is the other end side of the beam member 5, is connected to the left end part in FIG. 2 of the lower 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. However, the lower part of the gap between the one-end mounting pieces 53, 53 may be open, and the lower part of the gap between the other-end mounting 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 composed 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 2.

[0031] A hook 3b is provided at each of the four corners at both ends of the longitudinal direction of each scaffolding board 3a, and 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 by hooking the hook 3b to the upper beam member 50 of the beam member 5. Although not shown, the hook 3b provided at one end of the longitudinal direction 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 to the central beam member 5, but the hooks 3b, 3b of each work floor 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 configuration of the work floor 3 described above 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 brackets 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 lower beam 51. Therefore, the upper beam 50 is required to have a higher bending strength than the lower beam 51, so the diameter of the upper beam 50 is larger than the diameter of the lower beam 51, as shown in Fig. 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 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 body 61a, and a recessed portion 61c that is formed between the protruding portion 61b and the cylindrical body 60. Note that in this embodiment, the recessed portion 61c is formed between the protruding portion 61b at the upper end of the plate 61 and the cylindrical body 60, 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 material in the vertical direction.

[0037] Moreover, the vertical length of the plate 61 is slightly shorter than the vertical distance between the upper beam material 50 and the lower beam material 51 of the beam member 5, and the plate thickness of the plate 61 is slightly thinner than the size of the gap 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 material 50 and the lower beam material 51, respectively, so that when the plate 61 is fitted between the one-end mounting pieces 53, 53, unlike when the plate 61 is fitted between the other-end mounting pieces 54, 54, the plate 61 is sandwiched between the upper beam material 50 and the lower beam material 51, and thus the relative movement between the beam member 5 and the joint 6 in the vertical direction is restricted.

[0038] Furthermore, the plate 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 body 61a is provided with a relief portion 61a2 that is formed by cutting out the lower side obliquely on the side opposite to the cylinder body, 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, 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 wobble 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 substantially the same as that of the plate 61 when the plate 61 is fitted between the mounting pieces 53, 53, 54, 54. However, the shape of the mounting pieces 53, 53, 54, 54 is not particularly limited and may be, for example, a rectangular plate.

[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 distance 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 central portions 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 the 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. 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 the case where one pin is inserted into each of the two holes 53a, 54a, 61a1.

[0044] In this embodiment, the restricting portion 72 is provided at a position in the axial direction of the pin portion 70 where it comes into contact with the mounting pieces 53, 54 when the pin portion 70 is inserted to an appropriate position relative to the mounting pieces 53, 54 and the holes 53a, 54a, 61a1 of the plate 61. Therefore, if the worker inserts the pin portion 70 into the holes 53a, 54a, 61a1 until the restricting portion 72 comes into contact with the mounting pieces 53, 54, the insertion amount of the pin portion 70 is always constant, so that it is possible to prevent variation 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 protruding from the outer periphery of the pin portion 70. Even in this case, the insertion amount of the pin portion 70 can be constant. However, when 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, so that the strength of the pin portion 70 against a force acting in the radial direction is increased.

[0046] In this embodiment, a through hole 70a that penetrates in the radial direction is formed at the tip of one of the pin portions 70 (upper side in FIG. 6). This through hole 70a is disposed at a position that protrudes from the mounting pieces 53, 54 when the pin portion 70 is inserted into the mounting pieces 53, 54 and the holes 53a, 54a, 61a1 of the plate 61. Although not shown, a non-detachment pin (not shown) can be inserted into the through hole 70a when the pin portion 70 is inserted into the holes 53a, 54a, 61a1 to prevent the connecting pin 7 from coming out of the mounting pieces 53, 54 and the holes 53a, 54a, 61a1 of the plate 61.

[0047] The above-mentioned 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 pins 7 may be formed as a plurality of independent pins, and the beam member 5 may be joined to the plate 61 of the joint 6 by inserting the pins one by one into the mounting pieces 53, 54 and the holes 53a, 54a, 61a1 of the plate 61.

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

[0049] However, the number of holes 53a, 54a, 61a1 of 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 the present embodiment, the holes 53a, 54a, 61a1 of the mounting pieces 53, 54 and the plate 61 are arranged in a line up along the vertical direction, but the direction in which the holes 53a, 54a, 61a1 are arranged is not particularly limited, and they may be arranged in a line up along the horizontal direction, for example. However, when the holes 53a, 54a, 61a1 are arranged in a line up along the vertical direction with respect to the mounting pieces 53, 54 and the plate 61, the horizontal width (width in the left-right direction in FIG. 2) of the mounting pieces 53, 54 and the plate 61 can be made shorter than when the holes 53a, 54a, 61a1 are arranged in a line up along the horizontal direction.

[0051] As described above, the beam members 5 can be connected to each plate 61 of the joints 6 via the connecting pins 7. The frame body 2 is configured in a square shape in a plan view by connecting each end of the beam members 5 to the opposing plates 61 of the four joints 6 via the connecting pins 7. Furthermore, when the suspended scaffolding 1 includes 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 linking a plurality of annular chain elements 4a together. 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) as viewed from the front side is referred to as the horizontal width, and the width of the chain element 4a (vertical chain element 4a) as viewed from the side side is referred to as the vertical width.

[0053] The stopper 8 is disk-shaped and has a notch 8a narrower than the width of the chain element 4a and wider than the length of the chain element 4a. As shown in FIG. 5, the stopper 8 is moved horizontally toward the chain 4 side with the notch 8a facing the vertical chain element 4a located below the lower end of the cylinder 60 of the chain 4 inserted into the cylinder 60 of the joint 6, and the vertical chain element 4a is inserted into the notch 8a. Then, the stopper 8 is sandwiched between the two horizontal chain elements 4a, 4a from above and below. Since the width of the notch 8a is narrower than the width of the horizontal chain element 4a (the width of the chain element 4a), the notch 8a does not allow the horizontal chain element 4a to be inserted. 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] Since the upper end of the chain 4 is connected to a building, structure, or the like, the scaffolding body 10 is suspended and supported by the building, structure, or the like via the multiple chains 4. However, the configuration of the stopper 8 described above is only an example, and the configuration of the stopper 8 is not particularly limited as long as the chain 4 can be attached to the joint 6. Furthermore, the number of chains 4 can be any number according to the size and supporting load of the scaffolding body 10, and the chain 4 does not have to be connected to all the joints 6. Furthermore, the means for connecting the chain 4 to the scaffolding body 10 is not particularly limited, and the chain 4 may be connected to a portion other than the joint 6, for example, to a beam member 5.

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

[0057] Next, a method for expanding the floor area of ​​the scaffolding body 10 suspended from a building or structure will be described. In the following, the parts attached to the existing scaffolding body 10 will be described with the word "for expansion" at the beginning. First, as shown in FIG. 7, one end of the upper beam 50 of the expansion beam member 5 is inserted in a vertical posture with one end of the upper beam 50 facing downward into a recess 61c formed at the upper end of the plate 61 of the joint 6 arranged on the rear side of the existing scaffolding body 10, which is the side where the floor area is expanded in the depth direction. After that, as shown by a solid line in FIG. 8, while supporting the other end of the expansion beam member 5 via a support such as a rope (not shown) attached to the other end, which is the tip of the expansion beam member 5, the worker slowly unrolls the support with one end of the upper beam 50 as a fulcrum, and rotates the other end of the upper beam 50 toward the rear side, gradually tilting the expansion beam member 5. Note that the support with which the worker supports the expansion beam member 5 may be other than a rope, and may be, for example, a belt, a chain, or a small crane.

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

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

[0060] Also, as shown by the solid line in FIG. 8, when the expansion beam member 5 is tilted toward the rear, the corner of one end of the upper beam member 50 enters the recess 61c, and the outer periphery of the one end abuts against the corner of the upper end of the protruding portion 61b, which is the side wall on the rear side of the recess 61c. In other words, the expansion beam member 5 falls 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 that 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 enters the recess 61c and is supported until the beam member 5 assumes a horizontal position, so that one end of the upper beam member 50 can be prevented from sliding and moving on the upper surface of the plate 61.

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

[0062] Here, the upper end of the protruding portion 61b, which is the upper end of the plate 61, is located below 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 of 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 the expansion beam member 5 can be positioned in the extension direction of the plate 61 (left and right direction in the figure) by abutting the end of the upper beam member 50 against the outer periphery of the cylindrical body 60. The difference in height between the upper end of the protruding portion 61b and the upper end of the cylindrical body 60 may be sufficient to allow the end of the upper beam member 50 to be hooked on the cylindrical body 60, and may be 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 protruding portion 61b may be located above the upper end of the cylindrical body 60.

[0063] As described above, the pair of one-end mounting pieces 53, 53 are vertically bridged between the upper beam material 50 and the lower beam material 51, and the lower part of the gap between the one-end mounting pieces 53, 53 is blocked by the lower beam material 51. Therefore, when the upper beam material 50 of the expansion beam member 5 is in a horizontal position, the lower beam material 51 abuts against the lower end of the plate 61, preventing the upper beam material 50 of the expansion beam member 5 from falling 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 are bridged across the upper beam 50 and the lower beam 51 in this manner, 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 the upper beam 50 side of one edge of the lower beam 51 passes very close to the plate 61. If the plate 61 is on the path through 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 material 51. Therefore, even if a pair of one-end side mounting pieces 53, 53 are bridged across the upper beam material 50 and the lower beam material 51, when the expansion beam material 5 is tilted toward the rear side to fit the plate 61 between the one-end side mounting pieces 53, 53, the lower beam material 51 of the expansion beam material 5 does not interfere with the plate 61, and the plate 61 can be smoothly inserted between the one-end side mounting pieces 53, 53.

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

[0067] In addition, when the expansion beam member 5 is tilted to the rear side and the plate 61 is fitted between the one-end side 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 escape portion 61a2 on the opposite cylindrical side of the plate 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 space 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 leads to a decrease in the strength of the plate 61, and increasing the vertical space between the upper beam member 50 and the lower beam member 51 leads to an increase in the vertical height of the beam member 5, which increases the size of the beam member 5 and increases its weight.

[0068] In contrast, in the present embodiment, when an escape portion 61a2 is provided on the anti-tube side of the plate main body 61a to prevent the lower beam material 50 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 that an increase in the weight of the beam material 50 can be avoided while preventing a decrease in the strength of the plate 61.

[0069] In addition, in this embodiment, one end of the expansion beam member 5 is inserted into the recess 61c in a vertical orientation, but the expansion beam member 5 may be tilted backward to fit the plate 61 between the other-end mounting pieces 54, 54 with the other end of the expansion beam member 5 inserted into the recess 61c of the plate 61 in a vertical orientation. In this case, since the sides of the pair of other-end mounting pieces 54, 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 backward to fit the plate 61 between the other-end mounting pieces 54, 54.

[0070] In addition, 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 rear and tilting it down with one end of the upper beam 50 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 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 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 rear side 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 that the expansion work of the floor area of ​​the scaffolding main body 10 can be carried out safely.

[0073] Next, the expansion beam member 5 is connected in the same manner to the joint 6 adjacent in the width direction to the joint 6 to which the expansion beam member 5 is connected. Then, 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 Fig. 10, a plurality of expansion scaffolding boards 3a are hung between two expansion beam members 5, 5 arranged in parallel, and the work floor 3 is installed. After that, as shown in Fig. 11, an expansion joint 6 is attached to each of the other end side attachment pieces 54, 54 of the two expansion beam members 5. Specifically, the expansion joint 6 is connected to a chain 4 suspended in advance from a building or structure, etc., via a stopper 8, and then the expansion joint 6 is attached to the other end side attachment piece 54 of the expansion beam member 5 via a connecting pin 7. Then, a worker does not need to lean out from above the work floor 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 in these operations, the worker does not need to lean out from the work floor 3, so the expansion work of the floor area of ​​the scaffolding main body 10 can be performed 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 being suspended and supported by a building, structure, etc. Note that the above-mentioned method of assembling the suspended scaffolding 1 is one example, and is not limited to the above-mentioned method.

[0077] In addition, two existing scaffolding bodies 10, 10 may be assembled simultaneously in the air, and an expansion beam member 5 may be hung between the mutually facing joints 6, 6 of the two existing scaffolding bodies 10, 10 to connect the two existing scaffolding bodies 10, 10 in the air to assemble one 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 scaffolding body 10 on the right side of the figure of the two existing scaffolding bodies 10, 10 in a vertically upright position with one end of the upper beam member 50 facing downward, and then the beam member 5 is tilted toward the joint 6 of the other scaffolding body 10 on the left side of the figure. Here, as described above, the side of the pair of other end side mounting pieces 54, 54 provided on the other end side of the beam member 5 in this embodiment is connected to the other end of the lower beam member 51, so that the lower part of the gap between the other end side mounting pieces 54, 54 is open. Therefore, when the upper beam member 50 of the expansion beam member 5 is laid down towards 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 the connecting pins 7, the expansion beam member 5 can be hung and connected between the joint 6 of one scaffolding body 10 and the joint 6 of the other scaffolding body 10.

[0078] Then, although not shown, the two scaffolding bodies 10 can be connected in midair by suspending an expansion beam member 5 between two parallel joints 6, 6 of one scaffolding body 10 and two parallel joints 6, 6 of the other scaffolding body 10 in the above procedure, and suspending multiple scaffolding boards 3a between the two expansion beam members 5, 5 to install the work floor 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 downward so that the expansion beam member 5 can be hung between the joints 6, 6 of the two scaffolding bodies 10, 10, but if such use is not envisaged, the gap between the other end mounting pieces 54, 54 may be closed by the lower beam member 51, similar to the gap between the one end mounting pieces 53, 53. In this way, the structure of one end side and the other end side of the beam member 5 will be the same, preventing the occurrence of assembly errors.

[0080] As described above, 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 a connecting member, and a work platform 3 installed between the beam members 5, 5, and a chain 4 (suspension member) that suspends the scaffolding body 10. The beam member 5 includes an upper beam member 50 (beam member) and a pair of mounting pieces 53, 53, 54, 54 that are provided at the lower ends of each end of the upper beam member 50, arranged side by side when viewed from the axial direction, and each having pin holes 53a (54a) facing each other. The joint 6 is a cylindrical member having an axis aligned along the vertical direction. 60, and a plurality of plates 61 arranged at a predetermined interval in the circumferential direction on the outer periphery of the cylindrical body 60 and capable of fitting between the mounting pieces 53, 53, 54, 54 along the axial direction of the cylindrical body 60, the plate 61 having a recess 61c formed at the upper end and an insertion hole 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 member being a connecting pin 7 which is inserted into the opposing pin holes 53a, 54a and the insertion hole 61a1 when the plate 61 is fitted between the mounting pieces 53, 53, 54, 54.

[0081] According to the suspended scaffolding 1 configured in this manner, the beam member 5 does not have beam members arranged side by side, and therefore has a compact structure. Then, in a state where one end of the upper beam member 50 of the beam member 5 is stood upright with its bottom facing down and inserted into the recessed portion 61c in a vertical orientation, the other end of the upper beam member 50 is rotated toward the rear side with the 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, and the connecting pin 7 is inserted into the pin holes 53a, 53a of the one-end mounting pieces 53, 53 facing each other and the insertion hole 61a1 of the plate 61, whereby the beam member 5 can be connected to the joint 6.

[0082] In such a connecting operation of the beam members 5, a worker does not need to lean out from the working floor 3 of the scaffolding main body 10 suspended and supported on a building, structure, etc. Therefore, in the suspended scaffolding 1 of this embodiment, the beam members 5 can be configured compactly, and the operation of connecting the beam members 5 to the joints 6 of the scaffolding main body 10 can be performed safely.

[0083] Furthermore, when one end of the upper beam 50 is inserted into the recess 61c, one end of the upper beam 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 that the beam member 5 can be safely tilted toward the rear, 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 leaned 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 one end of the upper beam member 50 from slipping 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 on the outer periphery of the cylinder 60 of the joint 6, but the number of plates 61 may be appropriately determined according to the number of beam members 5 connected to the joint 6, and is not particularly limited as long as it is two or more. Also, the arrangement intervals of the multiple plates 61 may be appropriately determined according to the shape of the frame body 2 that constitutes the scaffolding main body 10.

[0086] In addition, in the suspended scaffolding 1 of this embodiment, the width of the recess 61c is wider than the height of the upper beam 50 in the vertical direction. According to 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 formed between one end of the upper beam 50 and the side wall of the recess 61c. Then, the upper beam 50 can be oriented in the vertical direction, so that the orientation of the upper beam 50 is stabilized in the recess 61c, and the upper beam 50 is allowed to rotate toward the rear side because a gap is formed between one end of the upper beam 50 and the side wall of the recess 61c, so that the beam member 5 in the vertical orientation can be safely and easily tilted toward the rear side. The width of the recess 61c may be narrower than the height of the upper beam 50 in the vertical direction as long as it allows the insertion of the corner of one end of the upper beam 50.

[0087] In addition, in the suspended scaffolding 1 of this embodiment, the upper end of the plate 61 is located below the upper end of the cylindrical body 60. In the suspended scaffolding 1 configured in this manner, the end of one end of the upper beam member 50 in a horizontal position faces the outer periphery of the cylindrical body 60, so that 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. Therefore, the pin holes 53a, 53a, 54a, 54a of the mounting pieces 53, 54 can be easily aligned with the insertion hole 61a1. However, the upper end of the plate 61 may be located above 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 arranged in line below the upper beam member 50 and extending 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 the upper beam 50 facing downward and tilted to a sideways orientation, 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, so that the beam member 5 can be positioned at a position where the pin hole 53a of the one-end mounting piece 53 faces the insertion hole 61a1 of the plate 61. This facilitates the operation of connecting the beam member 5 to the plate 61 of the joint 6.

[0090] Moreover, 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 opposite side to the cylinder body. In the suspended scaffolding 1 configured in this manner, even if a pair of one-end side mounting pieces 53, 53 are spanned between 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 side 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 side 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, cutting out the lower side of plate 61 on the anti-tube side to form escape portion 61a2 does not require changing the vertical length of plate 61 or the vertical distance between upper beam material 50 and lower beam material 51, so it is possible to avoid an increase in the weight of beam member 5 while preventing a decrease in the strength of plate 61.

[0092] In this embodiment, the relief portion 61a2 is formed by cutting the plate body 61a of the plate 61 obliquely, but the shape of the cutout is not particularly limited, and may be formed, for example, by cutting 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 the plate body 61a obliquely, the 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 that a decrease in the strength of the plate 61 can be suppressed.

[0093] In addition, in the suspended scaffolding 1 of this embodiment, the beam member 5 has a lower beam member 51 arranged below the upper beam member 50 and extending parallel to the upper beam member 50, and the side of a pair of other end side mounting pieces (mounting pieces) 54, 54 is 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 a posture along the vertical direction, and the beam member 5 is tilted to the rear side to fit the plate 61 between the other end side mounting pieces 54, 54, the lower beam member 51 does not interfere with the plate 61 even if the plate 61 does not have a recess 61a2. Therefore, since there is no need to process the plate 61 to provide the recess 61a2, the reduction in the area of ​​the plate 61 can be suppressed and the reduction in the strength of the plate 61 can be prevented.

[0094] 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 a vertically upright position with one end of the upper beam 50 facing down, and the other end of the upper beam 50 is then tilted toward the other scaffolding body 10, so that 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 floors 3 of both scaffolding bodies 10, 10 via connecting pins 7, thereby connecting the beam member 5 across 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 are assembled simultaneously in the air, and by spanning the beam member 5 between the 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 panel area can be assembled in a short period of time.

[0096] In this embodiment, the lower part of the gap between the one-end mounting pieces 53, 53 provided on one end side 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 the lower part of the gap between the one-end mounting pieces 53, 53 may be open and the lower part of the gap between the other-end mounting pieces 54, 54 may be closed by the lower beam member 51. Alternatively, 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 may be open or closed. 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 spaced apart 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 connect the pin portions 70 together (gripping portions 71 or regulating portions 72).

[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 wobbling of the beam member 5.

[0099] Furthermore, since the connecting pin 7 has the same number of pin portions 70 as the 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. This improves the efficiency of the work of connecting the beam member 5 to the joint 6 compared to the case where one pin is inserted one by one into the multiple pin holes 53a, 54a and insertion holes 61a1.

[0100] The number of pin holes 53a, 53a, 54a, 54a and 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 points, so that rattling in the vertical direction of the beam member 5 can be suppressed. 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 them may be omitted. Alternatively, the connecting pin 7 may be a plurality of independent pins, and each pin may be inserted into the pin holes 53a, 54a and the insertion hole 61a1 one by one.

[0102] In addition, 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 a connecting member, and a work floor 3 installed between the beam members 5, 5, and a chain 4 for suspending the scaffolding body 10, the beam member 5 having an upper beam member 50 and a pair of mounting pieces 53, 53, 54, 54 provided at the lower ends of each end of the upper beam member 50, arranged side by side when viewed from the axial direction, and having pin holes 53a, 54a facing each other, the joint 6 having a cylindrical body 60 whose axis is aligned in the vertical direction, and a plurality of plates 61 arranged at a predetermined interval 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 plate 61 having a recess 61c formed in an 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 side 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 opposing one-end mounting pieces 53, 53 and the insertion hole 61a1 of the plate 61.

[0103] According to such an assembly method of the suspended scaffolding 1, in the process of inserting one end of the upper beam 50 into the recess 61c in a vertically aligned position, the process of rotating the other end of the upper beam 50 to the rear side 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 one-end mounting pieces 53, 53 on one end side of the upper beam 50, and the process of inserting the connecting pin 7 into the pin holes 53a, 53a of the one-end mounting pieces 53, 53 facing each other and the insertion hole 61a1 of the plate 61, the worker does not need to lean out from the work floor 3 of the scaffolding main body 10 suspended and supported by a building or structure. Therefore, according to the assembly method of 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 safely performed.

[0104] Furthermore, when one end of the upper beam 50 is inserted into the recess 61c, one end of the upper beam 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 that the beam member 5 can be safely tilted toward the rear, 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 leaned 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 one end of the upper beam member 50 from slipping 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] DESCRIPTION OF SYMBOLS 1 suspended scaffold, 2 frame, 3 scaffold board, 4 chain (suspending member), 5 beam member, 6 joint, 7 connecting pin, 50 upper beam member (beam member), 51 lower beam member, 53 one end attachment piece (attachment piece), 53a, 54a pin hole, 54 other end attachment piece (attachment piece), 60 cylindrical body, 61 plate, 61a1 insertion hole, 61a2 relief portion, 61c recess, 70 pin portion, 71 gripping portion (connection portion), 72 restricting portion (connection portion)

Claims

1. 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 floor 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 provided at lower ends of each end of the beam material, arranged side by side when viewed from 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 on an outer periphery of the cylindrical body at predetermined intervals in a circumferential direction 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, a protrusion forming a side wall of the recess on the side opposite to the cylinder body, and an insertion hole facing 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 in which the plate is fitted between the mounting pieces, The beam has a corner portion below one end, The width of the recess along the extension direction of the plate from the cylinder is wide enough to allow insertion of the corner portion of the beam, The upper end of the protrusion on the recess side functions as a fulcrum for rotation of the beam member with the corner portion inserted into the recess toward the opposite side of the cylinder body. A suspended scaffold characterized by:

2. A suspended scaffold comprising a scaffold 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 suspending the scaffold body, The beam member includes a beam material and a pair of mounting pieces provided at lower ends of each end of the beam material, arranged side by side when viewed from 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 on an outer periphery of the cylindrical body at predetermined intervals in a circumferential direction 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 facing 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 in which the plate is fitted between the mounting pieces, The width of the recess along the extending direction of the plate from the cylinder is greater than the height of the beam in the up-down direction. A suspended scaffold characterized by:

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

3. The suspended scaffolding according to claim 1 or 2.

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 spanned between the beam and the lower beam.

3. The suspended scaffolding according to claim 1 or 2.

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

3. The suspended scaffolding according to claim 1 or 2.

7. The pin hole formed in the attachment piece and the insertion hole formed in the plate are each multiple, The connecting pin has pin portions that are arranged at equal intervals and in the same number as the pin holes and the insertion holes that face each other when the plate is fitted between the mounting pieces, and a connection portion that connects the pin portions to each other.

3. The suspended scaffolding according to claim 1 or 2.

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 floor 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 provided at lower ends of each end of the beam material, arranged side by side when viewed from 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 on an outer periphery of the cylindrical body at predetermined intervals in a circumferential direction 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 in which the plate is fitted between the mounting pieces. In the method of assembling a suspended scaffold, a step of inserting one end of the beam into the recess in a vertically aligned position; a step of inserting one end of the beam into the recess, rotating the other end of the beam toward the rear side, and fitting the plate between the mounting pieces on the one end side of the beam; and inserting the connecting pin into the pin hole of the mounting piece and the insertion hole of the plate, the connecting pin being opposed to each other. A method for assembling a suspended scaffolding.

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