Scaffolding structure and connector for scaffolding structure

Abstract

To provide a scaffold structure and a connector for the scaffold structure, capable of stably maintaining a connecting state of an existing scaffold and an extension scaffold, by firmly connecting the extension scaffold having a frame member and a floor plate material to the existing scaffold arranged in a construction object with a simple constitution.SOLUTION: A scaffold structure includes an existing scaffold 2 provided on a construction object 1, and an extension scaffold 3 connected to the existing scaffold 2 via a connector 5, the extension scaffold 3 includes a frame member 6 having a base end connected to the connector 5, and a floor plate material 7, and the base end of the frame member 6 is rotatably supported by the connector 5. A scaffold structure includes a temporary placement portion (55) on which a base end portion is temporarily placed at a folded position along an existing scaffold (2), and a holding portion (54) that holds a base end portion of a frame member (6) below the temporary placement portion (55) at a deployed position protruding from the existing scaffold (2).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a scaffolding structure used for carrying out maintenance, inspection, and other work on construction objects such as highway bridges and gymnasium ceilings, and to a connector for the scaffolding structure. [Background technology]

[0002] In recent years, for example, when constructing structures such as bridges, or when constructing buildings such as high-rise buildings, or when performing maintenance work on these structures, scaffolding is suspended below the construction object, and various operations are performed on this scaffolding. As a technology for constructing such scaffolding, a work platform support system is known that includes a first hub connected to a second hub via a first joist, a third hub connected to a fourth hub via the second joist, a third joist connecting the third hub and the first hub, and a fourth joist connecting the second hub and the fourth hub, and is configured so that the second, third, and fourth joists and the third and fourth hubs can articulate relative to the first and second hubs and the first joist from a closed position to an extended position to receive the work platform (see, for example, Patent Document 1).

[0003] Furthermore, by arranging a plurality of scaffolding frames, each of which has one longitudinal end supported so as to be rotatable horizontally, in parallel with a horizontal gap, and by arranging a floor panel so as to span the upper end side of each scaffolding frame, a hanging scaffold that is suspended from a structure is provided with spacing members that are arranged so as to span the lower end sides of the scaffolding frames that are arranged in parallel with a horizontal gap, and that engage both ends with the lower end sides of each scaffolding frame to hold the scaffolding frames at a gap, and the longitudinal end of another new scaffolding frame can be freely rotated horizontally to the longitudinal end of the scaffolding frame. a connecting portion that can be connected to the scaffolding frame, the connecting portion having a first connecting portion provided at one longitudinal end of the scaffolding frame, a second connecting portion provided at the other longitudinal end of the scaffolding frame and connected to the first connecting portion so as to be detachable in the vertical direction and rotatable in the horizontal direction, a base plate to which the lower ends of one of the first and second connecting portions and the lower end side of the end of the scaffolding frame are fixed, and a connecting plate that connects the upper ends of the first and second connecting portions that are connected to each other and the upper end side of the end of the scaffolding frame, wherein the first and second connecting portions are formed by cylindrical members that are inserted one inside the other (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5820848 [Patent Document 2] Patent No. 6957723 Summary of the Invention [Problem to be solved by the invention]

[0005] The work platform support system disclosed in Patent Document 1 is configured to connect an additional scaffolding (work platform) consisting of four joists connected by four hubs to an existing scaffolding installed below a construction object, and then deploy the additional scaffolding structure to its usage position. This configuration makes it possible to perform work such as connecting the additional scaffolding to the existing scaffolding in mid-air. However, because the additional platform connected to the existing scaffolding has four joists and four hubs and is extremely heavy, a large load is inevitably applied to the base ends of the joists when the additional platform is deployed from the folded position to the usage position, and therefore the hubs supporting the base ends of the joists must be made large and strong.

[0006] Furthermore, the suspended scaffolding disclosed in Patent Document 2 is configured such that a first connecting part consisting of a cylindrical member extending in the vertical direction and provided on one scaffolding frame is fitted onto a second connecting part consisting of a cylindrical member extending in the vertical direction and provided on another new scaffolding frame, and the second connecting part is pivotally supported around the axis of the first connecting part, thereby enabling the new scaffolding frame to be displaced from a folded position to an unfolded position. In this configuration, the inner diameter of the first connecting part must be larger than the outer diameter of the second connecting part to rotatably connect the two, which makes it easy for the connecting part of the two scaffolding frames to wobble, making it difficult to maintain a stable connection between the two scaffolding frames.

[0007] The present invention has been made in consideration of the above points, and aims to provide a scaffolding structure and a connector for a scaffolding structure that can firmly connect an additional scaffolding having a frame member and floor board material to an existing scaffolding set up at a construction object with a simple configuration, and that can stably maintain the connection state between the existing scaffolding and the additional scaffolding. [Means for solving the problem]

[0008] A scaffolding structure according to one example of the present invention comprises an existing scaffolding that is installed on a construction object and is equipped with a connector, and an additional scaffolding that is connected to the existing scaffolding via the connector, wherein the additional scaffolding has a frame member whose base end is connected to the connector, and a floor panel material that is installed to cover the space enclosed by the frame member, and the connector is provided with a temporary storage section where the base end is rotatably supported and where the base end is temporarily placed in a folded position along the existing scaffolding, and a holding section that holds the base end below the temporary storage section in an unfolded position where it protrudes from the existing scaffolding, and the frame member is supported so that it can be rotatably displaced from the folded position to the unfolded position, and is held so that it cannot be rotatably displaced in the unfolded position. [Effects of the Invention]

[0009] As described above, the scaffolding structure of the present invention includes a connector provided with a temporary storage section on which the base end of the frame member is placed when the frame member is in the folded position, and a holding section below the temporary storage section that holds the base end of the frame member when the frame member is in the unfolded position. When the frame member is rotated from the folded position to the unfolded position, the base end of the frame member temporarily placed on the temporary storage section of the connector is displaced to a holding position held in the lower holding section. This allows the following operations to be safely performed on the existing scaffolding: transporting the frame member to a folding position along the existing scaffolding, rotatably supporting its base end on the temporary storage section, and rotating the frame member from the folded position to the unfolded position and holding its base end in the lower holding section with easy and accurate positioning. Furthermore, by holding the base end of the frame member in the holding section of the connector when the frame member is unfolded at an appropriate angle relative to the existing scaffolding, the existing scaffolding and the additional scaffolding can be firmly connected with a simple configuration, thereby maintaining a stable connection between the two. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view showing an embodiment of a scaffolding structure according to the present invention; [Figure 2] A perspective view showing the configuration of the existing scaffolding [Figure 3]Front view showing the suspension state of the existing scaffolding and the additional scaffolding [Figure 4] FIG. 1 is a perspective view showing a specific configuration of a connector; [Figure 5] FIG. 10 is a front view showing a state in which an end of the frame member is temporarily placed on the temporary placement portion. [Figure 6A] A front view showing a state in which the end of the frame member is held by the holding portion. [Figure 6B] A front view showing the specific configuration of the cross pin [Figure 7] FIG. 10 is a plan view showing a state in which the end of the frame member is temporarily placed on the temporary placement portion. [Figure 8] FIG. 10 is a perspective view showing the configuration of a frame member; [Figure 9] 10 is a perspective view showing the process of connecting the connector and the frame member. [Figure 10] A process diagram showing how to construct a scaffolding structure [Figure 11] 10 is a perspective view showing a process of unfolding one of the frame members. [Figure 12] FIG. 10 is a perspective view showing a state in which one of the frame members is expanded. [Figure 13] FIG. 10 is a perspective view showing the process of unfolding the other frame member. [Figure 14] FIG. 10 is a perspective view showing a state in which the pair of frame members are unfolded. [Figure 15] FIG. 10 is a perspective view showing a state in which an intermediate support frame is suspended between opposing frame members. [Figure 16] A perspective view showing the process of fixing the floorboard material [Figure 17] A perspective view showing the process of fixing the floorboard material [Figure 18] A perspective view showing the process of fixing the floorboard material [Figure 19] A process diagram showing how the scaffolding structure will be removed DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same reference numerals are used to denote the same components, and the description thereof will be omitted.

[0012] 1 to 9 show an embodiment of a scaffolding structure according to the present invention. The scaffolding structure according to this embodiment comprises an existing scaffolding 2 installed on a construction object 1 such as a bridge, an additional scaffolding 3 connected to the existing scaffolding 2, and a suspending tool 4 that supports the existing scaffolding 2 and the additional scaffolding 3 in a suspended state from the construction object 1. In this embodiment, the existing scaffolding 2 and the additional scaffolding 3 have the same configuration, but it is also possible to use an existing structure that has been installed in advance on the construction object 1 as the existing scaffolding.

[0013] As shown in Figures 1 to 3, the existing scaffolding 2 and the additional scaffolding 3 in this embodiment have a plurality of connectors 5 supported in a suspended state from beams 11 etc. of the construction object 1 by hanging devices 4, a plurality of frame members 6 whose ends are connected to the connectors 5, floor panels 7 installed to cover the space surrounded by the frame members 6, and handrails 8 erected to surround the outer periphery of the existing scaffolding 2 and the additional scaffolding 3.

[0014] As shown in FIG. 3, the suspension device 4 has a beam clamp 41 that holds a beam 11 or the like of the construction object 1, a hoist 42 provided below the beam clamp 41, and a cable 43 made of a chain, wire rope, or the like that is supported by the hoist 42 so that it can be wound up and down, and the cable 43 is configured to support the connecting device 5 so that the height can be adjusted.

[0015] As shown in Figures 4 to 7, the connecting device 5 has a suspended part 50 suspended by cable 43 of the hanging device 4, a disk-shaped upper plate 51 to the upper surface of which the suspended part 50 is fixed by a fixing bolt or the like, a support pillar 52 made of a round pipe or the like extending downward from the lower surface of the center of the upper plate 51, a donut-shaped pressure plate 53 supported on the support pillar 52 so that it can be raised and lowered, a holding part 54 fixed to the lower part of the support pillar 52, a temporary placement part 55 provided at the upper part of the holding part 54, and a reinforcing plate 56 fixed to the lower surface of the holding part 54.

[0016] As shown in Fig. 4, the upper plate 51 of the connector 5 is formed with a plurality of insertion holes 512 for fixing bolts 511 that fix the presser plate 53 to an upper standby position (see Fig. 5), and four nuts 531 onto which the screw shafts of the fixing bolts 511 are screwed are fixed to the upper surface of the presser plate 53. In addition, the outer periphery of the presser plate 53 is provided with insertion holes 532 for first vertical pins 61 that are used to fix the frame member 6 to the holding portion 54 so that it cannot be displaced relative to the holding portion 54.

[0017] The holding portion 54 of the connector 5 has a bottom wall portion 541 that supports the lower end of the frame member 6, and a pair of left and right side wall portions 542, 542 (see FIGS. 4 and 5) that stand upward from the side ends of the bottom wall portion 541. As shown in FIG. 6A, at least the lower portion of the frame member 6 is held in a state where it is inserted between the both side wall portions 542, 542 of the holding portion 54. The bottom wall portion 541 of the holding portion 54 has an insertion hole 543 formed therein into which the first vertical pin 61 is inserted, and an insertion hole 544 formed adjacent thereto into which the second vertical pin 62 for fixing the frame member is inserted (see FIG. 7).

[0018] As shown in FIGS. 4 and 5, a pair of insertion holes 545, 545 are provided in the side wall portion 542 of the holding portion 54, into which a cross pin 63 for fixing the frame member 6 is inserted. As shown in FIG. 6B, the cross pin 63 has a cross pin body 632 having a head 631, and a tip portion 634 pivoted to the tip of the cross pin body 632 via a connecting pin 633. The cross pin body 632 inserted into the insertion hole 545 of the holding portion 54 is installed so as to penetrate a pipe-shaped member 68 provided inside the frame member 6, as shown in FIG. 6A. In addition, the tip portion 634 of the cross pin 63 is bent downward with the connecting pin 633 as a fulcrum, so that the end of the frame member 6 is fixed within the holding portion 54 in a state where it cannot be relatively displaced.

[0019] 4 and 5, the temporary placement portion 55 of the connector 5 is made up of a pair of flanges protruding outward from the upper end of the side wall portion 542. As shown in FIGS. 5 and 7, the base end of the frame member 6B1 in the folded position is placed on the temporary placement portion 55 and is rotatably supported by the support shaft 64.

[0020] In this embodiment, as shown in Fig. 7, the holding parts 54 and temporary placement parts 55 of the connector 5 are arranged at four horizontal positions at 90-degree angles on the connector 5. This allows the ends of each frame member 6 constituting the existing scaffolding 2 and the additional scaffolding 3 to be placed on the temporary placement parts 55. Furthermore, by inserting the ends of each frame member 6 into the holding parts 54, the four frame members 6 can be arranged in a cross shape in a plan view.

[0021] 8 and 9, the frame member 6 is made of, for example, a long rectangular pipe-like member having a vertically elongated cross section, and on both the upper and lower ends thereof are formed an insertion hole 65 through which the first vertical pin 61 is inserted, and an insertion hole 66 through which either the second vertical pin 62 or the support shaft 64 is selectively inserted. Also, on both the left and right side faces of the end of the frame member 6, a pair of insertion holes 67, 67 through which the horizontal pin 63 is inserted, respectively, are formed. Furthermore, a pipe-like member 68 serving as an insertion guide for the horizontal pin 63 is provided inside the frame member 6 (see FIG. 6A).

[0022] A plurality of screw holes 69 are provided at regular intervals on the upper surface of the frame member 6. These screw holes 69 serve as attachment points for restraint plates 71 (see FIG. 1) that restrain the ends of the floorboard material 7 from above. The screw holes 69 are formed by fastening nuts (not shown) below openings formed in the upper surface of the frame member 6, and serve as attachment points for hooks 45 and 46 (described later), as fixed points for support plates 82 provided on the lower parts of supports 81 that constitute the handrail 8, and as operating holes into which the tips of operating rods 47 are inserted.

[0023] The side wall of the frame member 6 is provided with a support bracket 83 having a pair of upper and lower insertion holes 84 into which the lower ends of the support posts 81 that make up the handrail 8 are inserted. With the lower ends of the support posts 81 inserted into the insertion holes 84 of the support bracket 83, the support plates 82 of the support posts 81 are screwed into the screw holes 69 of the frame member 6, etc., thereby fixing the handrail 8 and the frame member 6 together. In addition, a plurality of intermediate holding portions 91 with a U-shaped cross section are provided at regular intervals on the side of the frame member 6. As shown in Figure 15, the intermediate holding portions 91 function as locking portions to which both ends of the intermediate support frame 9, made of a square pipe-shaped member or the like that is hung between the frame members 6B1 and 6B2 that are deployed so as to face each other, are locked.

[0024] 10 shows a construction method for a scaffolding structure according to the present invention. The construction method for a scaffolding structure includes a connecting step K1 of connecting a frame member 6 of an additional scaffolding 3 to an existing scaffolding 2 set up on a construction object 1 via a connector 5, and an installation step K2 of installing floorboard materials 7 so as to cover a space surrounded by the frame member 6 constituting the additional scaffolding 3.

[0025] The connecting process K1 includes a delivery process K11 in which the frame members 6B1, 6B2 of the additional scaffolding 3 are delivered to a folded position (see Figures 11 and 13) along the frame member 6A located at the front edge of the existing scaffolding 2, and a support process K12 in which the base ends of the frame members 6B1, 6B2 delivered in the delivery process K11 are rotatably supported by the support shaft 64 while being placed on the temporary placement section 55 of the connecting device 5.

[0026] The installation process K2 includes a hanging process K21 in which the frame members 6B1, 6B2 of the additional scaffolding 3 are hung by the extension members 44 (see Figures 11 and 13); an unfolding process K22 in which the frame members 6B1, 6B2 in the above-mentioned folded position are rotated and displaced to an unfolded position (see Figures 12 and 14) in which they are protruded from the existing scaffolding 2; a holding process K23 in which the base ends of the frame members 6B1, 6B2 are inserted and held in the holding portion 54 of the connector 5 provided below the temporary placement portion 55; an arrangement process K24 in which the intermediate support frame 9 is arranged so as to span the frame members 6B1, 6B2 installed opposite each other; and a fixing process K25 in which the floor plate material 7 is placed on the intermediate support frame 9 and fixed with a restraint plate 71.

[0027] Specifically, in the hanging step K21, as shown in Fig. 11, one end of the overhang member 44 is fixed to a hook 45 screwed to the upper surface of a frame member 6 constituting the existing scaffolding 2, and the middle portion of the overhang member 44 is hooked to a hoist 42 of the hanging tool 4, and then the other end of the overhang member 44 is fixed to a hook 46 screwed to the upper surface of a frame member 6B1 constituting one side of the additional scaffolding 3. In this way, with the tip portion of the frame member 6B1 relative to the center in the length direction suspended by the overhang member 44, in the unfolding step K22, the frame member 6B1 can be smoothly rotated and displaced from the folded position along the existing scaffolding 2 to the unfolded position shown in Fig. 12.

[0028] In the unfolding step K22, as shown in Figure 11, after inserting the tip of the operating rod 47 into the operating hole consisting of the screw hole 69 of the frame member 6B1, a worker on the existing scaffolding 2 can safely rotate and displace the frame member 6B1 to the unfolded position shown in Figure 12 by using the operating rod 47 to push the frame member 6B1.

[0029] As described above, the frame member 6B1 constituting one side edge of the additional scaffolding 3 is rotated and displaced to the deployed position, and the base end of the frame member 6B1 is lowered from the temporary placement position shown in Fig. 5 to the holding position shown in Fig. 6A, and then in a holding step K23, the fixed state of the presser plate 53 by the fixing bolt 511 is released. Then, with the presser plate 53 slidably displaced from the upper standby position to the lower fixed position and in contact with the upper surface of the frame member 6B1, the first vertical pin 61 is inserted sequentially into the insertion hole 521 of the presser plate 53, the insertion hole 65 of the frame member 6B1, and the insertion hole 543 formed in the bottom wall portion 541 of the holding portion 54, and the first vertical pin 61 is installed so as to penetrate these.

[0030] 9, after the support shaft 64 is pulled out from the frame member 6B1, the second vertical pin 62 is inserted sequentially into the insertion hole 66 of the frame member 6B1 and the insertion hole 544 of the holding portion 54, thereby installing the second vertical pin 62 so as to penetrate these (see FIG. 6A). Furthermore, the horizontal pin 63 is inserted sequentially into the insertion hole 545 formed in the side wall portion 542 of the holding portion 54, the insertion hole 67 provided in the frame member 6B1, and the pipe-shaped member 68, thereby installing the horizontal pin 63 so as to penetrate these. As a result, the base end of the frame member 6B1 is fixed so as not to be displaced relative to the holding portion 54 of the connector 5. Note that in this embodiment, when the base end of the frame member 6B1 is fixed to the holding portion 54, the support shaft 64 is pulled out and replaced with the shorter second vertical pin 62. However, the support shaft 64 can also be used as is as the first vertical pin that fixes the base end of the frame member 6B1 to the holding portion 54.

[0031] 13, a carrying-in process K11 is performed to carry in the frame member 6B2 that constitutes the other side edge of the additional scaffolding 3 to a folded position along the frame member 6A, and a supporting process K12 is performed to rotatably support the frame member 6B2 by the support shaft 64 with the base end of the frame member 6B2 placed on the temporary placement section 55 of the connector 5. In addition, by sequentially carrying out a hanging process K21 to hang the frame member 6B1 of the additional scaffolding 3 by the protruding member 44 that protrudes from the hanging tool 4, an unfolding process K22 to rotatably displace the frame member 6B2 to the unfolded position, and a holding process K23 to insert and hold the base end of the frame member 6B2 in the holding section 54 of the connector 5, the frame members 6B1 and 6B2 are fixed in a state where they face each other with a certain gap between them, as shown in FIG.

[0032] Next, in the placement step K24, as shown in Fig. 15, the intermediate support frame 9 is placed so as to span the intermediate holding parts 91 of the opposing frame members 6B1, 6B2, and then the floor plate material 7 is placed on the intermediate support frame 9 as shown in Fig. 16. Furthermore, in the fixing step K25, as shown in Fig. 17, the floor plate material 7 on the intermediate support frame 9 is pulled a certain distance toward the existing scaffolding 2, and the left and right ends of the frame member 6B3 that constitutes the front edge of the additional scaffolding 3 are connected to the tip ends of the frame members 6B1, 6B2 via connectors 5, 5 provided on the left and right ends of the frame member 6B3.

[0033] 18, in fixing step K25, the floor plate material 7 is slid toward the front side of the existing scaffolding 2 so that its tip abuts against the inside surface of the frame member 6B3, and the end of the floor plate material 7 is pressed down from above by the restraining plate 71 to restrain it, and the connectors 5 provided on both the left and right ends of the frame member 6B3 are supported by the suspending devices 4 to the construction object 1. In this way, a scaffolding structure can be constructed in which the additional scaffolding 3 is connected to the existing scaffolding 2, as shown in FIG.

[0034] The scaffolding structure according to the present invention having the above-described configuration has the advantage that an additional scaffolding 3 having a frame member 6 and floor plate material 7 can be firmly connected with a simple configuration to an existing scaffolding 2 having a connector 5 provided on a construction object 1, and the connected state between the existing scaffolding 2 and the additional scaffolding 3 can be stably maintained. That is, the connector 5 is provided with a temporary placement section 55 on which the base end of the frame member 6 is placed when the frame member 6 is in the folded position, and a holding section 54 that holds the base end of the frame member 6 below the temporary placement section 55 when the frame member 6 is in the unfolded position, and the base end of the frame member 6 is rotatably supported in a state where it is temporarily placed on the temporary placement section 55. Therefore, the following operations can be safely performed on the existing scaffolding 2: carrying the frame member 6 to a folding position along the existing scaffolding 2 and rotatably supporting its base end on the temporary placement section 55; and rotating the frame member 6 from the folded position to the unfolded position and holding its base end in a state where it is easily and accurately positioned on the holding section 54. Furthermore, by deploying the frame member 6 at an appropriate angle relative to the existing scaffolding 2 and holding its base end in the holding portion of the connector 5, there is an advantage that the existing scaffolding 2 and the additional scaffolding 3 can be firmly connected with a simple configuration and the connection between the two can be maintained stably.

[0035] In the above-described embodiment, as shown in Fig. 7, the connector 5 is used, in which the holding parts 54 and temporary placement parts 55 are arranged at four horizontal positions at 90-degree angles, so that the four frame members 6 constituting the existing scaffolding 2 and the additional scaffolding 3 can be arranged in a cross shape by placing the ends of each frame member 6 constituting the existing scaffolding 2 and the additional scaffolding 3 on the temporary placement parts 55, and then rotating and displacing each frame member 6 to insert its base end into the holding parts 54. Therefore, the frame members 6 constituting the existing scaffolding 2 and the additional scaffolding 3 can be connected in both the vertical and horizontal directions.

[0036] For example, as shown in Figures 1 and 17, a connector 5 separate from the connector 5 provided on the existing scaffolding 2 is connected to the tip of the frame members 6B1, 6B2 that make up the additional scaffolding 3, and the connector 5 is used to perform the expansion process (not shown) in which a new scaffolding is added to the additional scaffolding 3, thereby sequentially connecting multiple additional scaffoldings 3 to the existing scaffolding 2 via the connectors 5, and optionally expanding the installation range of the scaffolding structure.

[0037] Furthermore, in the above-described embodiment, the holding portion 54 of the coupler 5 is provided with a bottom wall portion 541 that supports the lower end of the frame member 6, and a pair of left and right side walls 542, 542 that stand upward from the side ends of the bottom wall portion 541, and is configured so that the base end of the frame member 6 is inserted into the holding portion 54 by displacing it downward from the temporary placement portion 55 of the coupler 5. With this configuration, simply by rotating and displacing the frame member 6 on the holding portion 54, the base end can be automatically displaced from the upper temporary placement position to the lower holding position in accordance with the weight of the frame member 6. Furthermore, there is an advantage that the frame member 6 can be stably held in a state where the deployment angle of the frame member 6 is accurately positioned in the direction along the extending direction of the side walls 542, 542 of the holding portion 54.

[0038] In the above-described embodiment, the temporary placement portion 55 of the connector 5 is configured by a pair of flanges protruding from the upper end of the side wall portion 542 outward from the holding portion 54. Alternatively, the flanges may be omitted and the upper end surfaces of the side wall portions 542 may be used as the flanges. However, with this configuration, when the frame member 6 is rotated and displaced, the bottom surface of the frame member 6 may rub against the upper end surfaces of the side wall portions 542, which may cause unpleasant noise or deformation of the side wall portions 542. Therefore, as shown in the above-described embodiment, it is preferable to configure the temporary placement portion 55 of the connector 5 to protrude from the upper end of the side wall portions 542 outward from the holding portion 54, so that the frame member 6 can be rotated and displaced smoothly.

[0039] As shown in the above-described embodiment, when the base end of the frame member 6 is inserted into the holding portion 54, and the presser plate 53 is lowered to the fixed position shown in FIG. 6A and the base end of the frame member 6 is fixed to the holding portion 54 via the first and second vertical pins 61, 62 and the pair of horizontal pins 63, 63 so as not to be displaced relative to the holding portion 54, there is an advantage that the frame member 6 can be stably held in the deployed position with a simple configuration. Note that it is also possible to fix the base end of the frame member 6 to the holding portion 54 using fixing bolts instead of the first and second vertical pins 61, 62 and the pair of horizontal pins 63, 63. However, when the first and second vertical pins 61, 62 and the horizontal pins 63, 63, etc. are used as in the above-described embodiment, the frame member 6 can be easily and stably fixed simply by inserting them into the respective insertion holes. Moreover, the fixed state of the frame member 6 to the holding portion 54 can be easily released by pulling out the first and second vertical pins 61, 62 and the horizontal pins 63, 63, etc. from the respective insertion holes.

[0040] In the above-described embodiment, the presser plate 53 of the connector 5 is configured to be displaceable between an upper standby position and a lower fixed position by moving up and down along the support column 52. With this configuration, the base end of the frame member 6 can be easily placed on the temporary placement section 55 with the presser plate 53 fixed in the upper standby position shown in Fig. 5. Moreover, by inserting the first vertical pin 61 into the insertion hole 532 to fix the frame member 6 with the presser plate 53 slidably displaced to the lower fixed position and abutting the upper surface of the frame member 6, the frame member 6 can be effectively prevented from floating up.

[0041] 8 and 9, in the above-described embodiment, the handrail 8 and the frame member 6 are fixed together by inserting the lower ends of the support posts 81 that constitute the handrail 8 into a pair of upper and lower insertion holes 84 of a support bracket 83 provided on the side wall of the frame member 6, and then fastening a support plate 82 provided on the lower part of the support post 81 to the screw hole 69 of the frame member 6 with a screw. With this configuration, the handrail 8 can be used as a grip to easily perform tasks such as carrying in the frame member 6 and rotating the frame member 6 from the folded position to the unfolded position. Furthermore, the handrail 8 can ensure the safety of workers when installing the intermediate support frame 9 and floorboard materials 7.

[0042] Note that instead of the above-described embodiment in which the tip end portion of frame member 6 is suspended by overhanging member 44 extending from suspending tool 4, it is also possible to support frame member 6 in a suspended state by, for example, an unillustrated cable or the like hanging down from construction target object 1. However, as shown in FIGS. 11 and 13 , when frame members 6B1, 6B2 are suspended by overhanging member 44 extending from suspending tool 4, frame members 6B1, 6B2 can be rotated and displaced from the folded position to the unfolded position while maintaining the inclination angle and overhang length of overhanging member 44 substantially constant. Therefore, without the need for complicated work such as adjusting the overhang length of overhanging member 44, frame members 6B1, 6B2 can be smoothly rotated and displaced while maintaining frame members 6B1, 6B2 in a horizontal state.

[0043] 1 and 2, in the above-described embodiment, the existing scaffolding 2 has a frame member 6 whose tip is connected to a connector 5, similar to the additional scaffolding 3, and a floor plate material 7 that is installed in the space surrounded by the frame member 6, so that mass production can be achieved by standardizing the components of the existing scaffolding 2 and the additional scaffolding 3. This makes it possible to keep the manufacturing costs of the scaffolding structure low.

[0044] In the above-described embodiment, as shown in Fig. 15, a plurality of intermediate holding portions 91 are provided at regular intervals on the side surface of the frame member 6, and as shown in Fig. 16, an intermediate support frame 9 made of a square pipe-shaped member or the like is arranged to span the intermediate holding portions 91 of the opposing frame members 6, 6. With this configuration, the floor plate material 7 can be fixed while it is placed on the intermediate support frame 9, making the fixing work safe and easy. Moreover, by supporting the floor plate material 7 from below with the intermediate support frame 9, it is possible to effectively prevent the floor plate material 7 from bending when a worker walks on the floor plate material 7, for example.

[0045] Furthermore, in the above-described embodiment, an operating hole such as a screw hole 69 into which the tip of the operating rod 47 can be inserted is formed on the upper surface of the frame member 6. Therefore, as shown in FIG. 11, when rotating and displacing the frame member 6B1 from the folded position to the unfolded position, the tip of the operating rod 47 can be inserted into the operating hole and the frame member 6B1 can be pushed using the operating rod 47, thereby easily and safely rotating and displacing the frame member 6B1 to the unfolded position.

[0046] 19 shows an example of a method for removing a scaffolding structure in which frame members 6 of additional scaffolding 3 are connected via connectors 5 to existing scaffolding 2 set up on a construction object 1, and floor plate materials 7 are installed to cover the space enclosed by the frame members 6. The method for removing the scaffolding structure involves removing the additional scaffolding 3, etc., in a procedure that is substantially the reverse of the scaffolding structure construction method shown in FIG. 10, and includes a removal process T1 in which the floor plate materials 7 are removed from the frame members 6 of the additional scaffolding 3 connected to the existing scaffolding 2, and a detachment process T2 in which the frame members 6 of the additional scaffolding 3 are detached from the existing scaffolding 2.

[0047] The removal process T1 includes a floor board removal process T11 in which the floor board material 7 of the additional scaffolding 3 fixed by the restraint plate 71 is removed from the fixed portion, and a support frame removal process T12 in which the intermediate support frame 9 of the additional scaffolding 3 is removed from the frame members 6B1 and 6B2.

[0048] The detachment process T2 includes a lifting process T21 in which the base ends of the frame members 6B1, 6B2, which are in an extended position protruding from the existing scaffolding 2, are lifted from the holding position held by the holding portion 54 of the connector 5 to above the holding portion 54; a folding process T22 in which the frame members 6B1, 6B2 of the additional scaffolding 3 are rotated and displaced from the extended position to a folded position along the existing scaffolding 2; and a separation process T23 in which the base ends of the frame members 6B1, 6B2 of the additional scaffolding 3 are separated from the connector 5.

[0049] Specifically, in a floor board removal step T11 of the removal step T1, the restraint of the floor board 7 by the restraining plate 71 is released (see FIG. 18), and then the floor board 7 of the additional scaffolding 3 is slid toward the existing scaffolding 2 to separate the tip of the floor board 7 from the frame member 6B3 (see FIG. 17). Then, the connectors 5, 5 provided on both the left and right ends of the frame member 6B3 are removed from the tip of the frame members 6B1, 6B2, thereby removing the frame member 6B3 (see FIG. 16). Next, after the floor board 7 is removed from the intermediate support frame 9 (see FIG. 15), in a support frame removal step T12, the intermediate support frame 9 is detached from the intermediate holding parts 91 provided on the frame members 6B1, 6B2 and removed (see FIG. 14).

[0050] Next, in the lifting step T21 of the detachment step T2, the pressure plate 53 of the connector 5 is displaced to the upper standby position shown in Figure 5, and while fixed to the upper plate 51 by the fixing bolt 511, the first vertical pin 61, the second vertical pin 62, and the horizontal pins 63, 63 are pulled out, thereby releasing the fixed state of the frame member 6B1 relative to the holding portion 54, and then the base ends of the frame members 6B1, 6B2 are pulled up above the holding portion 54, thereby releasing the holding state of the frame members 6B1, 6B2 by the holding portion 54.

[0051] Next, in a folding step T22, the frame members 6B1, 6B2 are suspended by the overhanging members 44 as needed, and with their base ends rotatably supported by the support shafts 64, the frame members 6B1, 6B2 are rotated and displaced from the unfolded position shown in Fig. 14 to the folded position shown in Figs. 13 and 11. Thereafter, in a separation step T23, the base ends of the frame members 6B1, 6B2 are separated and removed from the connectors 5, thereby returning them to the initial state shown in Fig. 2. Furthermore, by removing the existing scaffolding 2 from the construction object 1 as needed, the entire scaffolding structure according to the present invention can be removed. [Explanation of symbols]

[0052] 1. Construction Objects 2 Existing scaffolding 3 Additional scaffolding 4 Hanging equipment 6 Frame members 7. Flooring 8 Handrails 9 Intermediate support frame 44 Projection member 47 Operation rod 53 Presser plate 54 Holding part 55 Temporary storage area 64 Support shaft 69 Screw hole (operating hole) 81 Post 91 Intermediate holding part 541 Bottom wall 542 Side wall

Claims

1. A scaffolding structure comprising an existing scaffolding provided on a construction object and equipped with a connector, and an additional scaffolding connected to the existing scaffolding via the connector, The additional scaffolding has a frame member whose base end is connected to the connector, and a floor board material installed so as to cover the space surrounded by the frame member, The connecting tool is provided with a temporary placement section in which the base end is rotatably supported and in which the base end is temporarily placed in a folded position along the existing scaffolding, and a holding section that holds the base end below the temporary placement section in an unfolded position protruding from the existing scaffolding, A scaffolding structure, wherein the frame member is supported so as to be rotatably displaceable from the folded position to the unfolded position, and is held so as not to be rotatably displaceable at the unfolded position.

2. The scaffolding structure according to claim 1 , wherein the connecting device has the holding portions and the temporary placement portions arranged at four horizontal positions at 90-degree angles.

3. The scaffolding structure according to claim 2 , wherein another connector is connected to the tip of the frame member in the additional scaffolding.

4. the holding portion has a bottom wall portion that supports a lower end portion of the frame member, and a pair of left and right side wall portions that stand upward from side ends of the bottom wall portion, The scaffolding structure according to claim 1 , wherein the base end is inserted into the holding portion by being displaced downward from the temporary placement portion.

5. The scaffolding structure according to claim 4 , wherein the temporary placement portion protrudes from the upper end of the side wall portion toward the outside of the holding portion.

6. The scaffolding structure according to claim 1 , wherein the base end of the frame member is fixed to the holding portion so as not to be displaceable relative to the holding portion when the frame member is in the deployed position.

7. The connector includes a presser plate that restricts upward displacement of the frame member, The scaffolding structure according to claim 6, wherein the pressure plate is displaceable between a pressure position in which the pressure plate abuts against the upper surface of the frame member and a standby position above the pressure position.

8. 6. A scaffolding structure as claimed in any one of claims 1 to 5, comprising a handrail having a support pillar, the lower end of which is fixed to the frame member.

9. A hanging tool is provided to support the existing scaffolding in a suspended state from the construction object, The scaffolding structure according to claim 1 , wherein the frame member is suspended by an extension member extending from the suspension tool.

10. A scaffolding structure as described in any one of claims 1 to 5, wherein the existing scaffolding has a frame member whose tip is connected to the connector, and a floor panel material installed to cover the space surrounded by the frame member.

11. The frame member is formed with an intermediate holding portion, an intermediate support frame is bridged across the intermediate holding portions of the opposing frame members; 6. A scaffolding structure as claimed in any one of claims 1 to 5, wherein the floorboards are supported by the intermediate support frame.

12. The scaffolding structure according to claim 1 , wherein an operating hole into which the tip of an operating rod can be inserted is formed on the upper surface of the frame member.

13. A connector for a scaffolding structure that connects an existing scaffolding installed on a construction object and an additional scaffolding adjacent to the existing scaffolding, The additional scaffolding has a frame member whose base end is connected to the connector, The connecting tool is provided with a temporary placement section in which the base end is rotatably supported and in which the base end is temporarily placed in a folded position along the existing scaffolding, and a holding section that holds the base end below the temporary placement section in an unfolded position protruding from the existing scaffolding, The connector supports the frame member so that it can be rotated from the folded position to the unfolded position, and holds the frame member so that it cannot be rotated in the unfolded position.

14. The connector for a scaffolding structure according to claim 13, wherein the holding portions and the temporary placement portions are respectively arranged at four horizontal positions at 90-degree angles.

Images