Scaffolding floor installation device and scaffolding floor installation method

Abstract

To provide a scaffold floor installation technique that can stably send out an extending scaffold member forward with a simple configuration when extending a new scaffold floor from an existing scaffold floor.SOLUTION: A scaffolding floor installation device used when installing a scaffolding floor on a structure includes a rod-shaped member 1 that suspends a scaffolding member, and a support member 2 that is supported by the structure and supports the middle part of the rod-shaped member 1 from below. The rod-shaped member 1 is provided at its front end with a locking part 12 that locks onto the structure so as to restrict downward movement. While supported by the support member 2, the rod-shaped member 1 is able to slide at least partially forward.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a scaffolding installation technique used during the construction and maintenance inspection of buildings. [Background technology]

[0002] Scaffolding has traditionally been used for high-altitude work such as the construction and maintenance of buildings. Suspended scaffolding is used for bridges and elevated roads, but the method of assembling the scaffolding while supporting it from below poses various challenges, such as the need to restrict traffic below and the difficulty of supporting the scaffolding from below. Various proposals have been made to solve these challenges.

[0003] For example, Patent Document 1 discloses a device for constructing a suspended scaffold that fixes guide rails to a building and sends out joists forward using movable hoists that can move back and forth along the guide rails. With this technology, joists are sent out forward from an existing scaffold using movable hoists and fixed, and then flooring materials are installed. By repeating this process, the scaffold can be gradually extended.

[0004] Patent Document 2 discloses a technology in which a mobile scaffolding is installed that is suspended from the underside of a building and can move in a predetermined direction, and while the mobile scaffolding is moved, suspension members are suspended from the building, and by installing rolling members between the multiple suspension members, the suspended scaffolding is gradually installed.

[0005] Patent Document 3 discloses a sending device that includes a cross beam sending device fixed to an installed scaffolding, and a sliding sending section that suspends a cross beam of the scaffolding to be extended at the tip end and is supported by the cross beam sending device so that it can slide forward. With the technology in Patent Document 3, the cross beam is suspended from the sliding sending section, and the cross beam is pushed forward using the floor material of the scaffolding to be extended, and the cross beam is fixed in a predetermined position. By repeating this process, the scaffolding can be gradually extended. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-097046 [Patent Document 2] Japanese Patent Publication No. 2023-170016 [Patent Document 3] Japanese Patent Publication No. 2022-147486 Summary of the Invention [Problem to be solved by the invention]

[0007] The techniques described in the above patent documents can solve the problems associated with methods of installing scaffolding while supporting the scaffolding floor from below. However, the technique described in Patent Document 1 requires the installation of guide rails equal to the overall length of the scaffolding to be installed prior to installation, which is not easy. Furthermore, the technique described in Patent Document 2 requires the installation of a mobile scaffold, which is also not easy. The technique described in Patent Document 3 is easier to prepare than these techniques. However, with the technique described in Patent Document 3, as the cross beam is pushed forward, the force point moves away from the fulcrum, increasing the force acting to lift the rear end of the slide feed section. This makes the cross beam more likely to drop, potentially compromising stability.

[0008] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide a scaffolding floor installation technology that has a simple configuration and can stably send the extending scaffolding members forward when extending a new scaffolding floor from an existing scaffolding floor. [Means for solving the problem]

[0009] In order to solve the above problems, the scaffolding floor installation device of the present invention, which is used when installing a scaffolding floor on a structure, comprises a rod-shaped member that suspends a scaffolding member, and a support member that is fixed to the structure and supports the middle part of the rod-shaped member from below, and the rod-shaped member has a locking portion at its front end that locks onto the structure so as to restrict downward movement, and the rod-shaped member can slide at least partially forward while supported by the support member.

[0010] In this configuration, the rod-shaped member supports a downward load at its tip by the locking portion that is locked to the structure, and at its middle portion by the support member that supports it from below. Therefore, even if a scaffolding member is suspended from the front of the rod-shaped member, the load is supported by the locking portion and the support member, preventing the rod-shaped member from sagging forward. Therefore, by sliding the rod-shaped member at least partially forward in this state, the scaffolding member can be moved forward stably. Note that the "middle portion" of the rod-shaped member in this invention does not refer only to the vicinity of the middle, but also refers to the area behind the position where the locking portion is provided.

[0011] In one preferred embodiment of the scaffolding floor installation device of the present invention, the rod-shaped member comprises a tubular large-diameter pipe and a small-diameter member inserted into the large-diameter pipe, and the small-diameter member and the large-diameter pipe are capable of sliding relative to each other.

[0012] In this configuration, the rod-shaped member can be extended or retracted by sliding the large-diameter pipe relative to the small-diameter member, or the small-diameter member relative to the large-diameter pipe, along the axial direction. Therefore, when supporting the rod-shaped member on a structure, it can be done in a short state, making the work easier. Furthermore, when partially sliding the rod-shaped member, only the front member can be slid while the rear end position remains fixed. Therefore, the rear member can be fixed to the structure, making the support state of the rod-shaped member more stable.

[0013] Furthermore, the present invention also covers a scaffolding floor installation method for installing a scaffolding floor on a structure, and such a scaffolding floor installation method comprises the steps of fixing a support member to the structure, supporting the lower part of the middle part of a rod-shaped member on the support member, engaging a locking portion provided on the tip side of the rod-shaped member with the structure so as to restrict downward movement of the rod-shaped member, suspending the scaffolding member behind the position where the locking portion of the rod-shaped member is provided, and sliding at least the part of the rod-shaped member that suspends the scaffolding member forward while maintaining support of the rod-shaped member by the support member.

[0014] It should be noted that these steps do not have to be performed in the order listed if there is no dependency between the steps, and the order can be changed. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view of a scaffold floor installation device. [Figure 2] FIG. 1 is a diagram showing the process flow of a scaffolding floor installation method. [Figure 3] 1 is a diagram showing the steps of a scaffolding floor installation method. [Figure 4] This is a perspective view of the scaffolding floor installation device supported by H-beams. [Figure 5] FIG. 10 is a perspective view of a rod-shaped member according to another embodiment. [Figure 6] FIG. 10 is a perspective view of an intermediate support member (support member) in another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Below, an embodiment of a scaffold floor installation device and a scaffold floor installation method according to the present invention will be described with reference to the drawings. In this embodiment, the installation of a suspended scaffold (an example of a scaffold floor in the present invention) will be described. Specifically, the scaffold floor is successively extended along the longitudinal direction of the underside of a bridge or an elevated road. Note that, in the present invention, front and rear refer to the side where a new scaffold floor is to be installed and the side of the existing scaffold floor, respectively. Furthermore, the width direction in the following description refers to the direction perpendicular to the front-to-rear direction on a horizontal plane.

[0017] FIG. 1 is a perspective view of a scaffold floor installation device according to this embodiment. The scaffold floor installation device according to this embodiment includes a rod-shaped member 1, an intermediate support member 2 (an example of a support member according to the present invention), and a rear support member 3. In this embodiment, a hollow, so-called single pipe is used as the rod-shaped member 1. By using such a hollow single pipe, the rod-shaped member 1 can be made lighter. The front end of the rod-shaped member 1 is provided with a rod-shaped or plate-shaped support portion 11 that is inserted radially or protrudes radially outward. Furthermore, the tip end of the support portion 11 is formed with a rod-shaped or plate-shaped locking portion 12 that extends in a direction perpendicular to the axial direction of the rod-shaped member 1 and the extension direction of the support portion 11. In this embodiment, the pair of support portions 11 and locking portion 12 are arranged symmetrically about the axis of the rod-shaped member 1. This allows the device to be locked to flanges or the like that protrude in either direction.

[0018] As shown in Figure 1, the intermediate support member 2 comprises a main body 21, a U-shaped U-shaped portion 22 provided below the main body 21, a support rotor 23 provided on the lower end side of the U-shaped portion 22, and a U-shaped clamp 24 provided on the upper side of the side of the main body 21.

[0019] The U-shaped portion 22 is composed of an upper wall 22a and two side walls 22b and 22c. The upper wall 22a is fixed to the main body 21 so as to be rotatable about a vertical axis, and the two side walls 22b and 22c extend downward from both ends of the upper wall 22a. Therefore, the U-shaped portion 22 is open downward.

[0020] The rotary support 23 is formed in the shape of a drum with a narrowed central portion of a cylinder, and is attached to the side walls 22b, 22c near the opening at the lower end of the U-shaped portion 22 so as to be rotatable around the axis A.

[0021] Due to this configuration, the area surrounded by the upper wall 22a, the side walls 22b and 22c, and the rotary support 23 forms an insertion portion 25. This insertion portion 25 is large enough to allow the rod-shaped member 1 to be inserted therethrough.

[0022] The U-shaped clamp 24 includes a U-shaped main body 24a having a generally U-shaped cross section, a high-tension bolt 24b inserted through the underside of the U-shaped main body 24a, and a disk 24c provided at the tip of the high-tension bolt 24b. By tightening the high-tension bolt 24b, an object can be clamped between the upper wall of the U-shaped main body 24a and the disk 24c. In this embodiment, as will be described later, the U-shaped clamp 24 can be used to clamp a portion of the structure, thereby fixing the intermediate support member 2 to the structure.

[0023] The rear support member 3 includes a main body 31, a clamp portion 32 provided on the lower end side of the main body 31, and a U-shaped clamp 33 provided on the upper end side of the main body 31. The clamp portion 32 and the U-shaped clamp 33 are provided on opposing surfaces of the main body 31.

[0024] The clamp unit 32 is a so-called single clamp and includes a substantially arc-shaped first clamp member 32a and a substantially arc-shaped second clamp member 32b. The first clamp member 32a is fixed to the lower end of the main body 31. One end of the second clamp member 32b is fixed to one end of the first clamp member 32a by a pin 32c so as to be rotatable about the axis of the pin 32c. By rotating the second clamp member 32b, the clamp unit 32 can be displaced between an open position and a closed position.

[0025] A fixing bolt 32d is connected to the first clamp member 32a near its free end by a pin 32e so as to be rotatable about the axis of the pin 32e. Meanwhile, a groove 32f is formed in the free end of the second clamp member 32b, into which the tip of the fixing bolt 32d fits. A nut 32g is provided near the tip of the fixing bolt 32d.

[0026] The U-shaped clamp 33 has the same configuration as the U-shaped clamp 24, and therefore a detailed description thereof will be omitted.

[0027] Next, a scaffold floor installation method using a scaffold floor installation device will be described. Fig. 2 shows the steps of the scaffold floor installation method according to the present invention, and Fig. 3 is a diagram schematically showing the steps of installing a scaffold floor. In this embodiment, as described above, the scaffold floor is a suspended scaffold installed on the underside of a structure such as a bridge, and the scaffold floor installation device will be described as being fixed to H-steel 4 provided on the structure. Therefore, in this embodiment, a structure such as a bridge corresponds to the structure in the present invention.

[0028] In the figure, only one H-beam 4 and a set of scaffolding floor installation devices supported by it are shown, but in reality there are at least two H-beams 4 in the width direction, and a scaffolding floor installation device is attached to at least the H-beam 4 located at the opposite end in the width direction. In this case, the lower flanges 41 (described below) of the two H-beams 4 protrude in opposite directions, but as described above, the locking portions 12 of the rod-shaped member 1 are provided in two places, so they can be locked to the lower flanges 41 protruding in opposite directions.

[0029] The scaffolding floor in this embodiment is composed of a pair of guide rails O installed along the width direction, a pair of roller rails K installed along the length direction (front-to-back direction), and a floor board Y installed on the roller rails K. A scaffolding unit U, which combines two guide rails O, multiple roller rails K, and multiple floor boards Y, is extended in the length direction of the structure. Furthermore, prior to carrying out the method described below, a scaffolding floor (for example, one unit) having an area sufficient to carry out the scaffolding floor installation method of the present invention is installed using a well-known method.

[0030] First, on the existing scaffolding floor X, a worker inserts a rod-shaped member 1 from front to rear through the insertion portion 25 of the intermediate support member 2 (#01) and temporarily fixes the rear support member 3 to the rear end of the rod-shaped member 1 (#02). Specifically, the first clamp member 32a and the second clamp member of the clamp unit 32 clamp the rear end of the rod-shaped member 1, and the fixing bolt 32d fits into the groove 32f. Nut 32g is then lightly tightened. Next, the intermediate support member 2 and the rear support member 3 are fixed to the H-beam 4 using the U-shaped clamp 24 of the intermediate support member 2 and the U-shaped clamp 33 of the rear support member 3 (#03). Specifically, the intermediate support member 2 is positioned so that the lower flange 41 of the H-beam 4 faces the internal space of the U-shaped body 24a of the U-shaped clamp 24, and the high-tension bolt 24b is tightened. As a result, the plate 24c rises, clamping the lower flange 41 of the H-beam 4 between the plate 24c and the upper wall of the U-shaped body 24a. This allows the intermediate support member 2 to be supported on the structure. The same applies to the rear support member 3. At this time, by rotating the rod-shaped member 1 and positioning the locking portion 12 on the lower flange 41 of the H-beam 4 and locking it, the front end of the rod-shaped member 1 can be supported by the H-beam 4, making the work easier. With the rod-shaped member 1 in this position, the nut 32g is firmly tightened to prevent the rod-shaped member 1 from moving relative to the rear support member 3. This prevents the rod-shaped member 1 from moving or rotating unintentionally during subsequent work, improving work safety. Note that the rod-shaped member 1 may be inserted into the insertion portion 25 of the intermediate support member 2 and secured to the rear support member 3 after the intermediate support member 2 and rear support member 3 are secured to the H-beam 4. 3(a) and 4 show the state in which the scaffolding floor installation device is attached to the H-beam 4 in this way. In this state, the middle part of the rod-shaped member 1 is supported from below by the middle support member 2, specifically the rotary support member 23.

[0031] Next, the scaffolding unit U to be extended is assembled on the existing scaffolding floor X (#04). Then, the parent and child O of the scaffolding unit U are suspended at the front end side of the rod-shaped member 1, rearward of the locking portion 12, using a cable or chain (hereinafter referred to as cable C) (see FIG. 3(b), #05). Therefore, in this embodiment, the entire scaffolding unit U or the parent and child O corresponds to the scaffolding member in the present invention. Note that the cable C may be slack when the scaffolding unit U is on the existing scaffolding floor X.

[0032] When suspending the scaffolding unit U as in this embodiment, it is preferable to suspend the rearmost and frontmost guards O from the rod-shaped members 1 in order to stabilize the scaffolding unit U. In this case, it is preferable that the position of the cable C suspending the rear guard O on the rod-shaped member 1 is forward of the intermediate support member 2, but if it is difficult to fix it in that position, it may be fixed behind the intermediate support member 2 and then re-fixed somewhere forward of the intermediate support member 2 along the way. Note that the method of suspending the guards O using the cable C is a well-known method, so a detailed explanation will be omitted.

[0033] Once the scaffolding unit U has been suspended from the rod-shaped member 1, the nut 32g is loosened enough to allow the rod-shaped member 1 to move, and the rod-shaped member 1 is pushed forward to a predetermined position (Figure 3(c), #06). As the rod-shaped member 1 moves, the scaffolding unit U suspended from the rod-shaped member 1 naturally moves forward as well. Note that although the rod-shaped member 1 abuts against the rotating support 23 of the intermediate support member 2, the rotating support 23 rotates around the axis A as the rod-shaped member 1 is pushed out, so the pushing out of the rod-shaped member 1 is less likely to be obstructed.

[0034] Because the scaffolding unit U is suspended from the front end of the rod-shaped member 1, the load of the scaffolding unit U acts in a direction that pulls down the front end of the rod-shaped member 1. However, because this load is supported by the intermediate support member 2 and the locking portion 12 of the rod-shaped member 1, downward movement of the front end of the rod-shaped member 1 is restricted, and the scaffolding unit U does not move down unnecessarily. Therefore, by appropriately adjusting the length of the cable C, the scaffolding unit U pushed forward can be positioned so that it can be connected to the existing scaffolding floor X. In this embodiment, when the rod-shaped member 1 is pushed forward, it loses support from the rear support member 3. However, if the length of the rod-shaped member 1 is set so that it is clamped by the clamp portion 32 of the rear support member 3 even when the rod-shaped member 1 is pushed forward, the load can be supported at three points, further improving stability.

[0035] After the scaffolding unit U has been advanced to a predetermined position where it can be connected to the existing scaffolding floor X, the scaffolding unit U is connected to the existing scaffolding and is suspended from the H-beam 4 (Fig. 3(d), #07). Then, the scaffolding floor installation device is moved forward (Fig. 3(e), #08). When moving the scaffolding floor installation device, it is possible to either completely remove the scaffolding floor installation device from the H-beam 4, or to move the entire scaffolding floor installation device forward with the high-tension bolts 23b, 33b of the U-shaped clamps 24, 33 slightly loosened, and then re-fix it.

[0036] By repeating this process, the scaffolding floor is gradually extended.

[0037] In the above-described embodiment, the entire rod-shaped member 1 is slid forward, but it is also possible to use a rod-shaped member 1 as shown in Fig. 5 and have it partially slid. This rod-shaped member 1 comprises a tubular large-diameter tube 1a and a rod-shaped or tubular small-diameter member 1b that is inserted into the large-diameter tube 1a, with a support portion 11 and a locking portion 12 formed on the tip side of the large-diameter tube 1a. The inner diameter of the large-diameter tube 1a and the outer diameter of the small-diameter member 1b are approximately the same, and the small-diameter member 1b slides relative to the large-diameter tube 1a in the axial direction, allowing the length of the rod-shaped member 1 to be extended or contracted.

[0038] When using this rod-shaped member 1, the rear support member 3 is fixed to the small diameter member 1b in a contracted state, and the large diameter pipe 1a portion is supported by the intermediate support member 2. Then, a scaffolding member is suspended from the large diameter pipe 1a, and the large diameter pipe 1a is slid forward to extend the rod-shaped member 1 and move the scaffolding member forward.

[0039] By using such a rod-shaped member 1, the length of the rod-shaped member 1 can be changed as needed, thereby improving work efficiency and safety.

[0040] It is also possible to provide a support portion 11 and a locking portion 12 on the small diameter member 1b side. Also, a locking mechanism may be provided to temporarily restrict the relative movement between the large diameter pipe 1a and the small diameter member 1b.

[0041] 6 is a perspective view of an intermediate support member 2 in another embodiment. This intermediate support member 2 has a cylindrical body 26 instead of the U-shaped portion 22 of the intermediate support member 2 in the above-described embodiment. This cylindrical body 26 is formed with an insertion portion 25 for inserting the rod-shaped member 1. Even when such an intermediate support member 2 is used, it is possible to support the middle portion of the rod-shaped member 1 from below and enable the rod-shaped member 1 to slide.

[0042] Thus, according to the present invention, when the scaffolding member is suspended and moved forward, the scaffolding member can be stably supported, thereby increasing safety.

[0043] [Another embodiment] (1) In the above-described embodiment, the locking portion 12 is rod-shaped or plate-shaped, but a roller or other rotating body may be provided at the tip of the locking portion 12. By providing such a rotating body at the locking portion 12, the frictional resistance between the locking portion 12 and the lower flange 41 of the H-beam 4 when the rod-shaped member 1 is slid is reduced, making it easier for the rod-shaped member 1 to slide.

[0044] (2) In the above embodiment, the intermediate support member 2 has an insertion portion 25 through which the rod-shaped member 1 is inserted and has a shape that covers the entire circumference of the rod-shaped member 1. However, as long as the shape can at least support the rod-shaped member 1 from below, it may have a shape that is open at the top, for example. However, from a safety standpoint, a shape that has an insertion portion 25 is preferable.

[0045] (3) In the above embodiment, the rear support member 3 is used to improve safety and work efficiency, but the rear support member 3 may be omitted.

[0046] (4) In the above embodiment, the scaffolding floor installation device is fixed to a structure such as a bridge, but the structure may be anything that can support the scaffolding floor. In that case, the engaging portion 12, the U-shaped clamps 24, 33, etc. may be shaped to suit the structure. [Industrial Applicability]

[0047] It can be used to install various scaffolding floors used in architecture, construction, maintenance and inspection, etc., including suspended scaffolding installed on bridges and elevated roads. [Explanation of symbols]

[0048] U: Scaffolding unit (scaffolding component) 1: Rod-shaped member 11: Support part 12: Locking part 2: Intermediate support member (support member)

Claims

1. A scaffolding floor installation device used when installing a scaffolding floor on a structure, A rod-shaped member for suspending the scaffolding member; a support member fixed to the structure and supporting an intermediate portion of the rod-shaped member from below, the rod-shaped member has a locking portion at its front end that is locked to the structure so as to restrict downward movement, A scaffold floor installation device in which the rod-shaped member is slidable at least partially forward while supported by the support member.

2. The rod-shaped member includes a large-diameter pipe and a small-diameter member inserted into the large-diameter pipe, 2. The scaffolding floor installation device according to claim 1, wherein the small diameter member and the large diameter pipe are slidable relative to each other.

3. A scaffolding floor installation method for installing a scaffolding floor on a structure, comprising: securing a support member to the structure; a step of supporting a lower portion of an intermediate portion of the rod-shaped member on the support member; a step of engaging a locking portion provided on the tip side of the rod-shaped member with the structure so as to restrict downward movement of the rod-shaped member; a step of suspending the scaffolding member behind a position where the locking portion of the rod-shaped member is provided; A scaffolding floor installation method comprising the step of sliding at least the part of the rod-shaped member that suspends the scaffolding member forward while maintaining support of the rod-shaped member by the support member.

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