Construction method of scaffold structure and removal method of scaffold structure

Abstract

To easily and safely perform work for connecting an extension scaffold having a frame member and a floor plate material to an existing scaffold having a connector arranged in a construction object.SOLUTION: A connecting step K1 of connecting a frame member of an additional scaffold to an existing scaffold provided in a construction object via a connector, and an installing step K2 of installing a floor plate material so as to cover a space surrounded by the frame member, in which the connecting step K1 includes a carrying-in step K11 of carrying the frame member to a folding position along the existing scaffold, and a supporting step K12 of rotatably supporting a base end portion of the frame member in a state of being placed on a temporary placing portion of the connector, the installation step K2 includes a developing step K22 that rotates and displaces the frame member at the folded position to a developed position where the frame member is projected from the existing scaffold, a holding step K23 that inserts and holds the base end portion in the holding portion of the connector provided below the temporary placement portion, and a fixing step K25 that fixes the floor plate material to the fixed portion.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a method for constructing a scaffolding structure used for carrying out work such as maintenance and inspection of construction objects such as highway bridges and gymnasium ceilings, and a method for removing 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 allows work such as connecting the additional scaffolding to the existing scaffolding to be performed 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 deploying the additional platform from its folded position to its usage position. This requires the hubs supporting the base ends of the joists to be large and strong, which makes the work of constructing the additional scaffolding complex and potentially dangerous.

[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 construction method for a scaffolding structure that can easily and safely connect an additional scaffolding having a frame member and floor board material to an existing scaffolding having connectors attached to a construction object, and that can stably maintain the connection state between the existing scaffolding and the additional scaffolding, as well as a method for removing the same scaffolding structure. [Means for solving the problem]

[0008] A construction method for a scaffolding structure according to one example of the present invention is a construction method for a scaffolding structure comprising: a connecting step of connecting a frame member of an additional scaffolding to an existing scaffolding set up on a construction object via a connector; and an installation step of installing flooring material so as to cover a space surrounded by the frame members that make up the additional scaffolding, wherein the connecting step comprises a carrying step of carrying the frame member to a folded position along the existing scaffolding, and a supporting step of rotatably supporting the base end of the frame member while placing it on a temporary storage portion of the connector, and the installation step comprises an unfolding step of rotating and displacing the frame member in the folded position to an unfolded position in which it protrudes from the existing scaffolding, a holding step of inserting and holding the base end into a holding portion provided below the temporary storage portion, and a fixing step of fixing the flooring material to a fixed portion.

[0009] In addition, one example of the present invention provides a method for removing a scaffolding structure in which a frame member of an additional scaffolding is connected to an existing scaffolding set up on a construction object via a connector, and a floor plate material is installed to cover a space surrounded by the frame member, and the method comprises a removal process for removing the floor plate material from a fixed part, and a detachment process for detaching the frame member from the existing scaffolding, and the detachment process comprises a lifting process for lifting the base end of the frame member, which is in an extended position protruding from the existing scaffolding, from a holding position held by a holding part of the connector, to above the holding part, a folding process for pivoting and displacing the frame member from the extended position to a folded position along the existing scaffolding, using a pivot point set at the base end of the frame member as a fulcrum, and a separation process for separating the base end from the connector. [Effects of the Invention]

[0010] The present invention relates to a scaffolding construction method for a scaffolding structure, and more particularly to a ...

[0011] In addition, according to the method for removing a scaffolding structure of the present invention, when removing a scaffolding structure that is formed by connecting the frame member of an additional scaffolding to an existing scaffolding set up on a construction object via a connector having a temporary storage section on which the base end of the frame member in the folded position is placed, and a holding section that holds the base end of the frame member in the unfolded position below the temporary storage section, the removal process can easily and safely remove the floor board material from the fixed section, and the detachment process can easily and safely remove the frame member from the existing scaffolding on the existing scaffolding. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view showing the overall configuration of a scaffolding structure constructed by a construction method 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] Process diagram showing an embodiment of the scaffolding structure construction method according to the present invention [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] Process diagram showing an embodiment of the scaffolding structure removal method according to the present invention DETAILED DESCRIPTION OF THE INVENTION

[0013] 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.

[0014] 1 to 9 show specific examples of scaffolding structures constructed by a construction method according to an embodiment of the present invention, and the scaffolding structure comprises an existing scaffolding 2 provided on a construction object 1 such as a bridge, an additional scaffolding 3 connected to the existing scaffolding 2, and a suspending device 4 that supports the existing scaffolding 2 and the additional scaffolding 3 in a suspended state from the construction object 1. Note that in this embodiment, the existing scaffolding 2 and the additional scaffolding 3 have the same configuration, but it is also possible to connect the additional scaffolding 3 to an existing scaffolding that is an existing structure that has been provided in advance on the construction object 1.

[0015] As shown in Figures 1 to 3, the existing scaffolding 2 and the additional scaffolding 3 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, floorboard materials 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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).

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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).

[0024] 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.

[0025] A support bracket 83 having a pair of upper and lower insertion holes 84 into which the lower ends of the support posts 81 of the handrail 8 are inserted is provided on the side wall of the frame member 6. 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 fastened with screws into the screw holes 69 of the frame member 6, 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, which is hung between the frame members 6B1 and 6B2 that are deployed so as to face each other, are locked.

[0026] 10 shows an embodiment of a scaffolding construction method according to the present invention. The scaffolding construction method according to this embodiment includes a connecting step K1 of connecting frame members 6 of an additional scaffolding 3 to an existing scaffolding 2 installed on a construction object 1 via connectors 5, and an installation step K2 of installing floorboard materials 7 so as to cover a space surrounded by the frame members 6 constituting the additional scaffolding 3.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] As described above, the construction method of the scaffolding structure according to the present invention comprises a connecting step K1 of connecting the frame member 6 of the additional scaffolding 3 to the existing scaffolding 2 provided on the construction object 1 via the connector 5, and an installation step K2 of installing the floor plate material 7 so as to cover the space surrounded by the frame member 6 of the additional scaffolding 3, wherein the connecting step K1 comprises a carrying-in step K11 of carrying the frame member 6 to a folding position along the existing scaffolding 2, and a supporting step K12 of rotatably supporting the base end of the frame member 6 in a state where it is placed on the temporary placing portion 55 of the connector 5, and the installation step K2 comprises a carrying-in step K12 of carrying the frame member 6 to a folding position along the existing scaffolding 2, and a supporting step K12 of supporting the frame member 6 rotatably in a state where it is placed on the temporary placing portion 55 of the connector 5, and The scaffolding includes an unfolding process K22 in which the frame member 6 is rotated and displaced to an unfolded position protruding from the existing scaffolding 2, a holding process K23 in which the base end of the frame member 6 is inserted into the holding section 54 provided below the temporary placement section 55 and held therein, and a fixing process K25 in which the floor plate material 7 is fixed to the fixed section. This has the advantage that the work of connecting the additional scaffolding 3 having the frame member 6 and the floor plate material 7 to the existing scaffolding 2 having the connector 5 provided on the construction object 1 can be easily and safely performed, and the connection state between the existing scaffolding 2 and the additional scaffolding 3 can be stably maintained.

[0037] In other words, the additional scaffolding 3 is configured to connect the frame member 6 to the existing scaffolding 2 installed on the construction object 1 via the connector 5, which has a temporary placement section 55 on which the base end of the frame member 6 in the folded position is placed, and a holding section 54 that holds the base end of the frame member 6 in the unfolded position below the temporary placement section 55.Therefore, the following operations can be easily and safely performed on the existing scaffolding 2: a delivery process K11 in which the frame member 6 is delivered to the folding position along the existing scaffolding 2, a support process K12 in which the base end of the frame member 6 is rotatably supported on the temporary placement section 55, an unfolding process K22 in which the frame member 6 is rotated from the folded position to the unfolded position, and a holding process K23 in which the base end of the frame member 6 is held by 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.

[0038] As shown in Figure 7, when using a connector 5 in which holding sections 54 and temporary placement sections 55 are arranged at four horizontal locations at 90-degree angles, the ends of each frame member 6 constituting the existing scaffolding 2 and the additional scaffolding 3 are placed on the temporary placement sections 55, and then the frame members 6 are rotated and displaced to insert their base ends into the holding sections 54, thereby arranging the four frame members 6 in a cross shape. Therefore, a scaffolding structure in which the frame members 6 constituting the existing scaffolding 2 and the additional scaffolding 3 are connected in both the vertical and horizontal directions can be easily and properly constructed.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] As shown in the above-described embodiment, in the holding step K23, after the base end of the frame member 6 is inserted into the holding portion 54, 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. This has the advantage of allowing the frame member 6 to 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 shown 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 first and second vertical pins 61, 62 and the horizontal pins 63, 63, etc. can be easily released from the fixed state of the frame member 6 to the holding portion 54 by pulling them out of the respective insertion holes.

[0043] 5, in the carrying-in step K11, with the presser plate 53 fixed in the upper standby position, the frame member 6 is carried into the folding position along the existing scaffolding, and then the base end of the frame member 6 can be easily placed on the temporary placement section 55 of the connector 5. Moreover, in the holding step K23, with the presser plate 53 slidably displaced to the lower fixed position and the presser plate 53 abutting against the upper surface of the frame member 6, the first vertical pin 61 is inserted into the insertion hole 532 to fix the frame member 6, thereby effectively preventing the frame member 6 from floating up.

[0044] 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, by using the handrail 8 as a grip, it is possible to easily carry in the frame member 6 in the carrying-in step K11, and to rotate the frame member 6 from the folded position to the unfolded position in the unfolding step K22. Moreover, the handrail 8 can ensure the safety of workers when placing the intermediate support frame 9 in the placing step K24, fixing the floorboard material 7 in the fixing step K25, and so on.

[0045] Note that in the hanging step K21, instead of the above-described embodiment in which the tip end portion of the frame member 6 is hung by the overhanging member 44 that overhangs from the hanging tool 4, it is also possible to support the frame member 6 in a hanging state by, for example, an unillustrated cable or the like hanging down from the construction target 1. However, as shown in FIGS. 11 and 13 , when the frame members 6B1, 6B2 are hung by the overhanging member 44 that overhangs from the hanging tool 4, the frame members 6B1, 6B2 can be rotated and displaced from the folded position to the unfolded position while the inclination angle and overhang length of the overhanging member 44 are kept substantially constant. Therefore, without the need for complicated work such as adjusting the overhanging length of the overhanging member 44, the frame members 6B1, 6B2 can be smoothly rotated and displaced while maintaining the frame members 6B1, 6B2 in a horizontal state.

[0046] 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.

[0047] Furthermore, as shown in the above-described embodiment, if the arrangement step K24 is configured to arrange an intermediate support frame 9 made of a square pipe-shaped member or the like across intermediate holding portions 91 provided on opposing frame members 6, 6 as shown in Fig. 16, then in the fixing step K25, the floor plate material 7 can be fixed with the floor plate material 7 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.

[0048] 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, in the unfolding step K22, as shown in FIG. 11, when the frame member 6B1 in the folded position is rotated 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 the frame member 6B1 to the unfolded position.

[0049] 19 shows an embodiment of a method for removing a scaffolding structure in which a frame member 6 of an additional scaffolding 3 is connected via a connector 5 to an existing scaffolding 2 set up on a construction object 1, and floor plate materials 7 are installed so as to cover a space enclosed by the frame member 6. The method for removing a scaffolding structure according to this embodiment removes 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 step T1 in which the floor plate materials 7 are removed from the frame member 6 of the additional scaffolding 3 connected to the existing scaffolding 2, and a detachment step T2 in which the frame member 6 of the additional scaffolding 3 is detached from the existing scaffolding 2.

[0050] 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.

[0051] 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.

[0052] 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).

[0053] 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.

[0054] 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.

[0055] As described above, according to the method for removing a scaffolding structure of the present invention, when removing a scaffolding structure consisting of a temporary placement section 55 on which the base end of the frame member 6 in the folded position is placed, a holding section 54 that holds the base end of the frame member 6 in the unfolded position below the temporary placement section 55, and a connector 5 having the same, the work of removing the floor board material 7 from the fixed section in the removal process T1 and the work of detaching the frame member 6 from the existing scaffolding 2 in the detachment process T2 can be easily and safely performed on the existing scaffolding 2. [Explanation of symbols]

[0056] 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 construction method for a scaffolding structure, comprising: a connecting step of connecting a frame member of an additional scaffolding to an existing scaffolding set up on a construction object via a connecting tool; and an installation step of installing flooring materials so as to cover a space surrounded by the frame member, The connecting step includes a carrying-in step of carrying the frame member to a folding position along the existing scaffolding, and a supporting step of rotatably supporting the base end of the frame member while placing it on a temporary placement portion of the connecting tool, A scaffolding structure construction method, wherein the installation process includes an unfolding process in which the frame member in the folded position is rotated and displaced to an unfolded position in which it protrudes from the existing scaffolding, a holding process in which the base end is inserted into a holding portion of the connecting device provided below the temporary storage portion and held therein, and a fixing process in which the floor plate material is fixed to the fixed portion.

2. The installation process further includes a hanging process of hanging the frame member by a protruding member extended from a hanging tool that supports the existing scaffolding in a suspended state from the construction object, 2. The scaffolding structure construction method according to claim 1, wherein in the unfolding step, the frame member is rotatably displaced from the folded position to the unfolded position while being suspended by the protruding member.

3. The installation step further includes a placement step of placing an intermediate support frame across the intermediate holding portions of the frame members that are arranged to face each other, 3. The scaffolding structure construction method according to claim 1, wherein in the fixing step, the floorboard material is fixed in a state in which it is placed on the intermediate support frame.

4. 3. A scaffolding structure construction method according to claim 1, wherein in the unfolding step, the lower ends of the posts constituting the handrail are fixed to the frame member, and then the frame member and the handrail are integrally rotated and displaced to the unfolded position.

5. 3. A scaffolding structure construction method as described in claim 1 or 2, wherein in the unfolding process, the tip of an operating rod is inserted into an operating hole formed on the upper surface of the frame member, and the frame member is rotated and displaced to the unfolded position using the operating rod.

6. 3. A scaffolding structure construction method as described in claim 1 or 2, further comprising an expansion step of connecting another connector to the tip of the frame member, connecting another frame member to the expansion scaffolding via the connector, and attaching another floor plate material onto the frame member to expand the new scaffolding.

7. A method for removing a scaffolding structure in which a frame member of an additional scaffolding is connected to an existing scaffolding installed on a construction object via a connector, and a floor plate material is installed to cover a space surrounded by the frame member, The method includes a removal process of removing the floorboard material from the fixed portion, and a detachment process of detaching the frame member from the existing scaffolding, A method for removing a scaffolding structure, wherein the detachment process includes a lifting process in which the base end of the frame member, which is in an extended position protruding from the existing scaffolding, is lifted from a holding position held by a holding portion of the connector to above the holding portion; a folding process in which the frame member is pivotally displaced from the extended position to a folded position along the existing scaffolding, using a pivot point provided at the base end of the frame member as a fulcrum; and a separation process in which the base end is separated from the connector.

Images