Scaffolding component installation device and scaffolding component installation method

Abstract

This invention provides a scaffolding component installation technology that can reduce the man-hours required when extending new scaffolding from existing scaffolding. [Solution] The scaffolding member installation device A, used when installing scaffolding members of a suspended scaffolding on a structure, comprises a rod-shaped body 1, a suspension part 3 that suspends and supports the rod-shaped body from below the structure, and a sliding suspension body 4 that is supported by the rod-shaped body 1 and suspends the scaffolding member. The suspension part 3 is located in the middle of the rod-shaped body 1 in the axial direction. The sliding suspension body 4 can slide along the rod-shaped body 1 to a position further forward than the suspension part 3.

Description

Technical Field

[0001] The present invention relates to a scaffolding used in the construction and maintenance inspection of buildings, particularly to an installation technique of a scaffolding member of a suspended scaffolding installed directly below structures such as bridges.

Background Art

[0002] Conventionally, scaffolds have been used for high-altitude work such as building construction and maintenance inspection. Suspended scaffolds are used for bridges and elevated roads, but there are various problems such as the need to restrict traffic below or the difficulty of supporting the scaffold floor from below when assembling while supporting the scaffold floor from below. To solve such problems, various proposals have been made.

[0003] For example, Patent Document 1 discloses a construction device for a suspended scaffold that fixes a guide rail to a building and sends out a large pulling material forward with a movable hanger that can move forward and backward along the guide rail. In this technique, after sending out and fixing the large pulling material forward using the movable hanger from an existing scaffold, the floor material is installed. By repeating this, the scaffold can be gradually extended. However, in the technique of Patent Document 1, prior to the installation of the scaffold, it is necessary to install a guide rail having the same length as the entire scaffold to be installed, and the installation of this guide rail is not easy.

[0004] To solve such problems, the inventor of the present invention invented the scaffold floor installation technique of Patent Document 2. In this technique, since there is no need to install a guide rail as in Patent Document 1, the scaffold can be easily extended.

[0005] However, in the technique of Patent Document 2, since it is necessary to lock a locking portion provided at the tip of the rod-shaped member, it cannot be applied to a scaffold installed directly below a structure such as a bridge.

[0006] A technique for installing scaffolding directly beneath structures such as bridges is disclosed, for example, in Patent Document 3. This technique in Patent Document 3 includes a hanger rail suspended directly beneath the structure and a launching device that moves back and forth along the hanger rail. When installing new scaffolding, the launching device is advanced with the new scaffolding member suspended from its tip, thereby launching the new scaffolding member forward. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2003-097046 [Patent Document 2] Japanese Patent Publication No. 2025-140931 [Patent Document 3] Japanese Patent Publication No. 2023-012754 [Overview of the project] [Problems that the invention aims to solve]

[0008] The technology described in Patent Document 3 allows for the installation of scaffolding directly beneath structures such as bridges. However, the technology in Patent Document 3 requires suspending the entire guide rail from its tip to its rear end, which increases the effort required to move the guide rail.

[0009] The present invention has been made in view of the above problems, and its purpose is to provide a scaffolding member installation technology that can reduce the number of man-hours required when extending a new scaffolding from an existing scaffolding. [Means for solving the problem]

[0010] To solve the above problems, the present invention provides a scaffolding member installation device used when installing scaffolding members of a suspended scaffold on a structure, comprising a rod-shaped body and the rod-shaped body Through a plate-like body erected above the aforementioned rod-shaped body A suspension part that is suspended and supported below the structure, and a sliding suspension body that is supported by the rod-shaped body and suspends the scaffolding member, It is provided on the rear end side of the suspension portion so as to protrude above the rod-shaped body, and contacts the structural portion from below.The sliding suspension body comprises a rear end displacement restricting portion that restricts the rear end of the rod-shaped body from being displaced above a predetermined position, the suspension portion is located in the middle of the axial direction of the rod-shaped body, and the sliding suspension body is It comprises a pair of arc-shaped arm portions that are fitted onto the rod-shaped body and have a gap between them that is larger than the thickness of the plate-shaped body, and from the rear end of the rod-shaped body The rod-shaped body can slide along the rod-shaped body to a position further forward than the suspension portion.

[0011] In this configuration, since the suspension part is located in the middle of the rod-shaped body in the axial direction, when the suspension part is suspended from the structure on the existing scaffolding, the portion of the rod-shaped body in front of the suspension part can be made to protrude forward of the existing scaffolding. Therefore, when the sliding suspension body is slid forward of the suspension part, the scaffolding members of the new scaffolding suspended by the sliding suspension body move forward of the existing scaffolding. This allows the scaffolding members of the new scaffolding to be connected to the existing scaffolding. Furthermore, when installing new scaffolding further ahead, it is necessary to move the scaffolding member installation device forward, but since it is only suspended from the structure and the suspension part is not located in front of the middle of the rod-shaped body, the suspension position can be easily changed with minimal effort.

[0012] Furthermore, when the sliding suspension body slides forward of the suspension part, a downward force acts on the tip of the rod-shaped body 1, and this force acts as an upward force on the rear end. As a result, the rod-shaped body assumes a downward-sloping posture, making it impossible to stably suspend the scaffolding members of the newly constructed scaffolding. In contrast, in this configuration, the rear end displacement restricting part restricts the upward displacement of the rear end of the rod-shaped body, and therefore also restricts the downward displacement of the tip of the rod-shaped body 1. This allows the rod-shaped body 1 to be maintained in a nearly horizontal position, enabling stable suspension of the scaffolding members.

[0013] In one preferred embodiment of the scaffolding member installation device according to the present invention, the suspension portion is located behind the center of the rod-shaped body in the axial direction.

[0014] When the suspension part is positioned behind the center in the axial direction of the rod-shaped body as in this configuration, the part of the rod-shaped body in front of the suspension part can be lengthened, and the part of the rod-shaped body protruding from the existing scaffold can be lengthened. Therefore, the overall length of the rod-shaped body can be shortened, and it becomes easier to remove the scaffold member installation device.

[0015] Furthermore, the present invention also includes within the scope of rights a scaffold member installation method for installing a scaffold member of a suspension scaffold on a structure. Such a scaffold member installation method is carried out by a suspension part provided at an intermediate part in the axial direction of the rod-shaped body, Through a plate-like body erected above the aforementioned rod-shaped body a step of suspending the front part of the rod-shaped body from the lower surface of the structure in a posture where the front part of the rod-shaped body protrudes forward from the existing scaffold, A portion is provided at the rear end of the suspension portion, so as to protrude above the rod-shaped body. Rear end displacement restricting part By bringing it into contact with the structural part from below a step of restricting the rear end of the rod-shaped body from being displaced upward from a predetermined position, A pair of arc-shaped arm portions, each having a gap larger than the thickness of the plate-like body, are fitted onto the rod-like body. a step of suspending the scaffold member with respect to a slide suspension body that can slide in the front-rear direction along the rod-shaped body, and a step of sliding the slide suspension body forward along the rod-shaped body beyond the suspension part.

[0016] This scaffold member installation method also exhibits the same operational effects as the above-described scaffold member installation device.

Brief Description of the Drawings

[0017] [Figure 1] It is a perspective view of the scaffold member installation device. [Figure 2] It is a side view of the scaffold member installation device suspended from the lower surface of the bridge. [Figure 3] It is a diagram schematically showing the steps of the scaffold floor installation method. [Figure 4] It is a diagram showing the flow of the steps of the scaffold floor installation method.

Embodiments for Carrying Out the Invention

[0018] An embodiment of a scaffolding member installation device and a scaffolding member installation method according to the present invention will be described below with reference to the drawings. In this embodiment, a case where a suspension scaffold is installed on the lower surface of a bridge B (an example of a structure in the present invention) will be described. In the present invention, the front and rear respectively mean the side of a newly installed scaffold floor (hereinafter referred to as a newly installed scaffold) and the side of an existing scaffold floor (hereinafter referred to as an existing scaffold). Also, the width direction in the following description is a direction orthogonal to the front-rear direction on a horizontal plane.

[0019] FIG. 1 is a perspective view of the scaffolding member installation device in this embodiment. The scaffolding member installation device A in this embodiment includes a rod-shaped body 1, a plate-shaped body 2, a suspension portion 3, a slide suspension body 4, and a contact body 5. In this embodiment, as the rod-shaped body 1, a hollow so-called single pipe is used. By using such a hollow single pipe, the weight of the rod-shaped body 1 can be reduced. The length of the rod-shaped body 1 can be appropriately changed, but in this embodiment, it is set to 2600 mm.

[0020] The plate-shaped body 2 is erected above the rod-shaped body 1 in a posture where its thickness direction coincides with the width direction. The length of the plate-shaped body 2 is slightly shorter than the length of the rod-shaped body 1, and the front end positions of the rod-shaped body 1 and the plate-shaped body 2 coincide. A through hole 21 penetrating in the thickness direction is formed in the plate-shaped body 2. A suspension portion 3 described later is attached to the through hole 21. That is, the suspension portion 3 is located at the position of the through hole 21, and at this position, the scaffolding member installation device A is suspended from the bridge. In this embodiment, the through hole 21 is formed at a position 1200 mm from the rear end of the rod-shaped body 1. That is, the through hole 21 is formed slightly behind (in the middle part) the center in the axial direction of the rod-shaped body 1.

[0021] In this embodiment, the number of the through holes 21 is set to 1, but the number of the through holes 21 can be appropriately changed. When the number of the through holes 21 is increased, the stability when the scaffolding member installation device A is suspended from the structure is improved, but the man-hours for detaching and attaching the scaffolding member installation device A to the bridge B increase.

[0022] Furthermore, a plate-shaped retaining element 22 extends in the width direction from the front end of the plate-shaped body 2. When the slide suspension body 4, which will be described later, reaches the front end, the slide suspension body 4 comes into contact with this retaining element 22, so the slide suspension body 4 can only advance to this contact position. Therefore, it is possible to prevent the slide suspension body 4 from falling off the front end of the rod-shaped body 1.

[0023] The suspension part 3 is a component for suspending the scaffolding member installation device A from a structure such as a bridge. The suspension part 3 comprises a ring body 31 and a hook body 32. The ring body 31 is inserted through the through hole 21. The hook body 32 comprises a hook-shaped portion 32a and a ring-shaped portion 32b provided at the lower end of the hook-shaped portion 32a. The hook-shaped portion 32a is formed in an upwardly convex arc shape and is designed to be hooked onto a suspension fitting b1 fixed to an anchor on the underside of the bridge B, which will be described later. The ring body 31 and the ring-shaped portion 32b are inserted through each other's centers. Due to this configuration, the rod-shaped body 1 can be suspended from the bridge B via the suspension part 3.

[0024] The sliding suspension body 4 suspends and supports the scaffolding members of the newly constructed scaffolding from the scaffolding member installation device A. For example, the pipe moving attachment device from Step Up Co., Ltd. can be used as such a sliding suspension body 4. The sliding suspension body 4 comprises a base portion 41 and a pair of arm portions 42. The arm portions 42 are formed in an arc shape and extend upward from the upper end of the base portion 41. A bearing 43 is provided near the upper end of the arm portions 42. In addition, a suspension hole 41a that penetrates in the front-rear direction is formed near the lower end of the base portion 41. The scaffolding members of the newly constructed scaffolding can be suspended from this suspension hole 41a.

[0025] The upper ends of the pair of arm portions 42 are slightly separated, and this separation distance is greater than the thickness of the plate-like body 2 and smaller than the outer diameter of the rod-like body 1. A roughly circular space is formed by the upper end of the base portion 41 and the inner circumference of the pair of arm portions 42, and the diameter of this circular space is slightly larger than the outer diameter of the rod-like body 1.

[0026] Because the slide suspension body 4 has this configuration, it can be fitted onto the rod-shaped body 1 almost completely, as shown by the dashed line in Figure 1. At this time, the plate-shaped body 2 is positioned between the tips of the pair of arm portions 42, and the bearing 43 contacts the rod-shaped body 1. As a result, the slide support 4 can move smoothly back and forth (slide) along the rod-shaped body 1. As mentioned above, a retaining arm 22 is formed at the tip of the plate-shaped body 2, so when the slide suspension body 4 reaches the front end of the rod-shaped body 1, the arm portion 42 or the bearing 43 contacts the retaining arm 22. This prevents the slide suspension body 4 from falling off the front end of the rod-shaped body 1.

[0027] A contact body 5 (an example of a rear end displacement restricting part in this invention) is provided near the rear end of the rod-shaped body 1, beyond the suspension portion 3. The contact body 5 comprises a shaft portion 51 and a dish-shaped portion 52. Although not shown in Figure 1, a male thread is formed on the outer circumference of the shaft portion 51 and is inserted into a screw hole, which is a female thread formed near the rear end of the rod-shaped body 1. The dish-shaped portion 52 is provided at the upper end of the shaft portion 51, allowing the contact body 5 to be stably brought into contact with the underside of the bridge. Furthermore, by rotating the shaft portion 51, the length of the shaft portion 51 protruding upward can be adjusted, and the position of the dish-shaped portion 52 can be adjusted.

[0028] By providing such a contact body 5, when the scaffolding member installation device A is suspended from the bridge B, the dish-shaped portion 52 can be brought into contact with the underside of the bridge B, thereby preventing the rear end of the rod-shaped body 1 from being displaced above a predetermined position, that is, preventing the front end of the rod-shaped body 1 from being displaced downward. As a result, the rod-shaped body 1 can be maintained in a horizontal position, and the scaffolding members of the newly constructed scaffolding can be stably suspended and supported.

[0029] Furthermore, in this embodiment, a semicircular fastening portion 6 is provided at the rear end of the rod-shaped body 1. One end of a cable or chain (hereinafter referred to as cable 7) is fastened to this fastening portion 6 (see Figure 2). The other end of this cable 7 is fastened to an existing scaffolding member or the like that is located below the rod-shaped body 1. This allows a force to be applied downward or diagonally downward to the rear end of the rod-shaped body 1, thereby restricting the displacement of the rear end of the rod-shaped body 1 above a predetermined position, that is, preventing the displacement of the front end of the rod-shaped body 1 downward. Therefore, the fastened portion 6 and the cable 7 function as a rear end displacement restricting portion in this invention.

[0030] Next, we will explain how to suspend the scaffolding member installation device A from the bridge B using Figure 2. As shown in the figure, multiple suspension fittings b1 are provided on the underside of the bridge B at predetermined intervals along the direction of extension of the scaffolding. The suspension fittings b1 are fixed to anchor bolts (not shown) provided on the bridge.

[0031] The scaffolding member installation device A is suspended from the suspension fitting b1 using the suspension part 3. Specifically, the hook-shaped part 32a of the suspension part 3 is hooked onto the suspension fitting b1. As described above, in this embodiment, the suspension part 3 is located behind the center in the axial direction of the rod-shaped body 1. Therefore, the position of the suspension part 3 acts as a fulcrum, causing the front end of the rod-shaped body 1 to be displaced downward and the rear end to be displaced upward. To prevent this, the amount of upward protrusion of the contact body 5 is adjusted so that the dish-shaped part 52 of the contact body 5 contacts the underside of the bridge B when the rod-shaped body 1 is in a substantially horizontal position. As a result, even if a force acts to displace the front end of the rod-shaped body 1 downward, the dish-shaped part 52 of the contact body 5 receives that force, and the rod-shaped body 1 can be maintained in a substantially horizontal position.

[0032] Furthermore, as described above, one end of the cable 7 is fastened to the fastening part 6, and the other end of the cable 7 is fastened to an existing scaffolding member or structure located below the rod-shaped body 1. As a result, even if a force acts to displace the rear end of the rod-shaped body 1 upward, that force can be absorbed by the structure via the fastened part 6 and the cable 7, and the rod-shaped body 1 can be maintained in a substantially horizontal position. Therefore, in this embodiment, the position of the rear end when the rod-shaped body 1 is in a horizontal position is the predetermined position in the present invention.

[0033] Next, a method for installing scaffolding members using scaffolding member installation device A will be described. Figure 3 is a schematic diagram showing the process of installing a scaffolding floor, and Figure 4 is a diagram showing the flow of the scaffolding member installation method according to the present invention. In the diagram, one scaffolding member installation device A is shown, but in reality, at least one more scaffolding member installation device A is placed side by side in the width direction.

[0034] In this embodiment, the scaffolding floor consists of a main support O installed along the width direction, a support K installed along the longitudinal direction (front-to-back direction), and a floor plate Y installed on the support K. A scaffolding unit U, which combines two main support Os, multiple support Ks, and multiple floor plates Y, is extended along the longitudinal direction of the bridge B. Prior to implementing the method described below, a scaffolding floor (for example, one unit) having an area sufficient for implementing the scaffolding floor installation method according to the present invention is installed using a well-known method.

[0035] First, the worker suspends the scaffolding member installation device A by hooking the hook-shaped part 32a of the suspension part 3 onto the suspension fitting b1 provided on the underside of the bridge B while standing on the existing scaffolding X (Figure 3(a), #01). At this time, approximately the front half of the rod-shaped body 1 protrudes forward from the existing scaffolding X. In this state, the worker also adjusts the upward protrusion length of the contact body 5 by rotating the shaft part 51 of the contact body 5 so that the dish-shaped part 52 of the contact body 5 of the scaffolding member installation device A contacts the underside of the bridge B (#02). Furthermore, the fastening part 6 of the scaffolding member installation device A and the rafter O of the existing scaffolding X are fastened using a cable 7. These steps restrict the downward displacement of the front end of the scaffolding member installation device A.

[0036] Next, the scaffolding unit U of the new scaffolding is assembled on the existing scaffolding X (#03). Then, the front rafter O of the scaffolding unit U is suspended from the suspension hole 41a of the sliding suspension body 4 using a cable or chain (hereinafter referred to as cable C) (Figure 3(b), #04). Note that the method of suspending the rafter O using cable C is a well-known method, so a detailed explanation is omitted. In this embodiment, the entire scaffolding unit U or the rafter O corresponds to the scaffolding member in the present invention. The cable C may be slack when the scaffolding unit U is on the existing scaffolding X.

[0037] Although not shown in the diagram, in this embodiment, the rear end of the scaffolding unit U is supported by a worker. Alternatively, two sliding suspension bodies 4 may be used to suspend the rearmost and frontmost parent / child O from the front and rear sliding suspension bodies 4, respectively.

[0038] Once the scaffolding unit U is suspended from the sliding suspension body 4, the sliding suspension body 4 is pushed forward from the suspension part 3, that is, in front of the existing scaffolding X (Figure 3(c), #05). At this time, the scaffolding unit U suspended from the sliding suspension body 4 naturally moves forward together with the sliding suspension body 4.

[0039] At this time, since the scaffolding unit U is located on the front end side of the rod-shaped body 1 (forward of the suspension part 3), the load on the scaffolding unit U acts in a direction that pulls down the front end side of the rod-shaped body 1. However, since this load is supported by the contact body 5 and via the cable 7, the downward displacement of the front end of the rod-shaped body 1 is restricted, the rod-shaped body 1 can maintain a nearly horizontal position, and the scaffolding unit U does not move downward unnecessarily. Therefore, if the length of the cable C is set appropriately, the scaffolding unit U, which is pushed forward, can be positioned to connect to the existing scaffolding floor X.

[0040] After advancing the scaffolding unit U to a predetermined position where it can be connected to the existing scaffolding X, the scaffolding unit U is connected to the existing scaffolding and installed (Figure 3(d), #06). Although not shown, at this time the scaffolding unit U is suspended from the suspension fittings b1, etc., of the bridge B.

[0041] Once the installation of the scaffolding unit U of the newly constructed scaffolding is complete, the cable 7 is removed and the scaffolding member installation device A is moved forward (Figure 3(e), #01). Specifically, the rod-shaped body 1 is suspended by hooking the hook-shaped part 32a of the suspension part 3 onto the suspension fitting b1 of the bridge B, at a position where approximately the front half of the rod-shaped body 1 protrudes forward of the newly constructed scaffolding unit U.

[0042] By repeating this process, the scaffolding floor is extended sequentially. Note that when repeating this process, step #02 can be omitted.

[0043] Thus, according to the present invention, the process of extending the scaffolding by suspending and moving the scaffolding members forward can be reduced.

[0044] [Another embodiment] (1) In the above embodiment, the suspension portion 3 is positioned behind the center of the rod-shaped body 1, but the position of the suspension portion 3 can also be in front of the center. However, it is necessary to consider that the position of the suspension portion 3 determines the length of the portion of the rod-shaped body 1 that protrudes forward from the existing scaffolding.

[0045] (2) In the above embodiment, the scaffolding member installation device A was suspended from a suspension fitting b1 installed on the bridge B, but it may also be suspended from a chain or the like fixed to the suspension fitting b1.

[0046] (3) In the above embodiment, the scaffolding member was suspended by the sliding suspension body 4, but other configurations may be used as long as they are capable of sliding along the rod-shaped body 1 while the scaffolding member is suspended.

[0047] (4) In the above embodiment, one suspension part 3 is provided, but multiple suspension parts 3 may be provided. In this case, the spacing between the suspension parts 3 must match the spacing of the suspension fittings b1. In this case as well, it is preferable to position all the suspension parts 3 behind the center in the axial direction of the rod-shaped body. [Industrial applicability]

[0048] It can be used for installing suspended scaffolding on bridges, elevated roads, and other structures. [Explanation of symbols]

[0049] A: Scaffolding component installation device B: Bridge (structure) 1: Rod-shaped body 2: Plate-like body 3: Hanging part 4: Slide suspension unit 5: Contact body (rear end displacement restricting part) 6: Fastening part (rear end displacement restricting part) 7: Cable (rear end displacement regulating section)

Claims

1. A scaffolding member installation device used when installing scaffolding members of a suspended scaffolding on a structure, A rod-shaped body and A suspension part that suspends and supports the rod-shaped body from below the structure via a plate-shaped body erected above the rod-shaped body, A sliding suspension body is supported by the rod-shaped body and suspends the scaffolding member, The system includes a rear end displacement restricting portion provided on the rear end side of the suspension portion so as to protrude above the rod-shaped body, and which contacts the structural portion from below to restrict the rear end of the rod-shaped body from being displaced above a predetermined position, The suspension portion is located in the middle of the rod-shaped body in the axial direction. The sliding suspension body is fitted onto the rod-shaped body and comprises a pair of arc-shaped arm portions having a gap larger than the thickness of the plate-shaped body, and is a scaffolding member installation device that can slide along the rod-shaped body from the rear end of the rod-shaped body to a position forward of the suspension portion.

2. The scaffolding member installation device according to claim 1, wherein the suspension portion is located behind the center in the axial direction of the rod-shaped body.

3. A method for installing scaffolding members of a suspended scaffolding system on a structure, The process involves suspending the rod-shaped body from the underside of the structure via a plate-shaped body erected above it, using a suspension portion provided in the middle of the rod-shaped body in the axial direction, so that the front portion of the rod-shaped body protrudes forward of the existing scaffolding. A step of restricting the displacement of the rear end of the rod-shaped body from a position above a predetermined position by bringing a rear end displacement restricting portion, which is provided on the rear end side of the suspension portion so as to protrude above the rod-shaped body, into contact with the structural portion from below, A step of suspending the scaffolding member from a sliding suspension body that is slidable in the front-rear direction along the rod-shaped body from the rear end of the rod-shaped body to the front of the suspension portion, by fitting a pair of arc-shaped arm portions, which have a gap larger than the thickness of the plate-shaped body, onto the rod-shaped body, A method for installing a scaffolding member, comprising the step of sliding the slide suspension body along the rod-shaped body forward of the suspension portion.

Images