JP5823461B2 - Scaffold support structure and suspension scaffold installation method - Google Patents

Description

  The present invention relates to a support structure for a scaffold used for repairing, cleaning, or maintenance work inside a hollow structure such as a silo or a container, and a method for installing a suspended scaffold.

  It is known to use a suspension scaffold for work such as repair and cleaning inside a hollow structure. The suspension scaffold for the hollow structure is installed by suspending the scaffold inside the hollow structure. The scaffold is installed so as to extend to the inner wall surface of the hollow structure and can be raised and lowered. Thereby, the worker who got on the scaffold can perform various operations such as repair and cleaning over the entire inner wall surface of the hollow structure.

  In general, hollow structures such as silos and containers do not have a doorway through which a large-scale device can be carried. For this reason, the scaffold disassembled in advance has been carried in through a narrow opening provided in the ceiling portion of the hollow structure, and the scaffold has been assembled inside the hollow structure. The maintenance work device (scaffold) of Patent Document 1 is a foldable type, and the maintenance work device is carried through the opening of the container ceiling and deployed inside the container to form a scaffold.

JP-A-8-270208

  However, the maintenance work device of Patent Document 1 is based on the premise that there is an opening at the center of the container ceiling. For this reason, it could not be used for a hollow structure having no opening at the center. When using it deliberately, it is necessary to add a new opening in the center.Addition of such an opening requires additional work and damages the basic specifications such as reducing the strength of the hollow structure. It was not appropriate.

  The present invention solves the conventional problems as described above, and a scaffold support structure and a scaffold capable of installing a suspended scaffold even in a hollow structure in which an opening is formed at a position away from the center of the ceiling. The purpose is to provide an installation method.

  In order to achieve the above object, the scaffold support structure of the present invention is a scaffold support structure disposed inside a hollow structure, and the hollow structure is separated from the center of the ceiling part on the ceiling part. An opening is formed at a position where the support structure has an outer support extending in a diameter direction of the hollow structure outside the hollow structure when installed in the hollow structure; An inner support body extending in a diameter direction of the hollow structure inside the hollow structure; and a connecting body that connects the outer support body and the inner support body through the opening; Locking means for suspending the scaffold is attached to the support. According to this configuration, even if the opening is located at a position away from the center of the ceiling portion of the hollow structure, the scaffold can be stably suspended using the opening as it is.

  The scaffold support structure of the present invention preferably includes a pedestal interposed between the outer support and the ceiling. According to this configuration, alignment when the outer support body and the coupling body are coupled is facilitated.

  Moreover, it is preferable that the position of the locking means can be adjusted in the diameter direction of the hollow structure. According to this configuration, the position of the scaffold can be easily adjusted.

  The suspended scaffold installation method of the present invention is a suspended scaffold installation method for installing a suspended scaffold on a hollow structure, wherein the hollow structure is formed with an opening at a position away from the center of the ceiling section. The support structure for suspending the scaffold is, when installed in the hollow structure, an outer support extending in the diameter direction of the hollow structure outside the hollow structure, and the hollow structure An inner support that extends in a diameter direction of the hollow structure; and a connecting body that connects the outer support and the inner support through the opening; A support is passed in the hollow structure beforehand through the opening, and the inner support and the outer support disposed outside the hollow structure are connected via a connecting body. Assembling the support structure, the foot is attached to the support structure. Characterized by installing a scaffolding hanging by attaching a locking means for hanging the. According to this configuration, even if the opening is located at a position away from the center of the ceiling portion of the hollow structure, the scaffold can be stably suspended using the opening as it is.

  In the installation method of the suspended scaffold according to the present invention, the inner support body and the connection body are connected to each other inside or outside the hollow structure before the connection body and the outer support body are connected. It is preferable to form a solid. According to this configuration, it is not necessary to perform the connecting operation between the inner support body and the connection body in a suspended state, and the assembly of the support structure is facilitated.

  In the suspension scaffold installation method of the present invention, a base is interposed between the outer support and the ceiling, and the outer support is positioned when connecting the outer support and the connection body. It is preferable to make adjustments. According to this configuration, alignment when the outer support body and the coupling body are coupled is facilitated.

  Moreover, it is preferable to adjust the position of the said locking means in the diameter direction of the said hollow structure, and to adjust the position which suspends a scaffold. According to this configuration, the position of the scaffold can be easily adjusted.

  According to the present invention, even when the opening is located at a position away from the center of the ceiling portion of the hollow structure, the scaffold can be stably suspended using the opening as it is.

The schematic block diagram which shows the state which installed the suspension scaffold using the support structure of the scaffold which concerns on one Embodiment of this invention in silo. The top view of the scaffold which concerns on one Embodiment of this invention. The figure which showed the principal part of the internal structure of the drive mechanism which concerns on one Embodiment of this invention. The side view of the support structure which concerns on one Embodiment of this invention. The figure which shows the carrying-in process of the disassembled support structure in one Embodiment of this invention. The perspective view which shows an example of the connection structure of an inner support body and a connection body in one Embodiment of this invention. Sectional drawing in the AA line of the inner support body 31 shown in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, a schematic configuration of a suspended scaffold using a scaffold support structure according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic configuration diagram showing a state in which a suspended scaffold 1 is installed in a silo 10 using a scaffold support structure 2 according to an embodiment of the present invention. FIG. 2 is a plan view of the scaffold 3. As shown in FIG. 1, the suspension scaffold 1 includes a support structure 2, a scaffold 3, and a lifting mechanism 4 as main components. The elevating mechanism 4 includes a rack rail 5 and a drive unit 6, and details will be described later. In the present embodiment, the hollow structure is described using the example of the silo 10, but is not limited thereto, and may be a tank or a container, for example.

  In the silo 10, a scaffold 3 and an elevating mechanism 4 are arranged. The scaffold 3 is a part on which an operator rides and works, and a handrail 7 is provided on the outer periphery. As shown in FIG. 2, the scaffold 3 has a frame formed by assembling the pipes 20. A plurality of plates 21 are bridged between the pipes 20, and a work table is formed between the pipes 20. FIG. 2 illustrates a state where the plate 21 is spanned over a part of the frame, but the plate is spanned over the entire frame. The scaffold 3 is integral with the drive unit 6, and the drive unit 6 is fixed inside the mounting frame 24 shown in FIG. 2. The structure of the scaffold 3 is an example, and other structures may be used as long as the worker can ride and work.

  FIG. 3 shows the main part of the internal structure of the drive unit 6 constituting the elevating mechanism 4. The sprocket 26 is rotated by the rotation of the motor 25 of the drive unit 6, the chain 27 spanned between the sprocket 26 and the sprocket 28 is driven, and the sprocket 28 is rotated. The pinion gear 29 rotates together with this rotation. The pinion gear 29 meshes with a rack gear 45 that is integral with the rack rail 5. Accordingly, the drive unit 6 moves along the rack rail 5 by the rotation of the pinion gear 29. That is, according to the forward / reverse rotation of the motor 25, the drive unit 6 moves up and down, and the scaffold 3 integrated with the drive unit 6 moves up and down at the same time. At this time, a roller 9 (FIG. 1) provided on the outer periphery of the scaffold 3 slides on the inner wall surface of the silo 10. By raising and lowering the scaffold 3, an operator on the scaffold 3 can perform various operations such as repair, cleaning, or maintenance work over the entire inner wall surface of the silo 10. The structure of the lifting mechanism 4 is an example, and other structures may be used as long as the scaffold can be lifted and lowered.

  In FIG. 1, the support structure 2 is disposed inside the silo 10 and outside the silo 10 via the ceiling portion 11 of the silo 10. One end of the support wire 46 is attached to the support structure 2 via a trolley 40 that is a locking means, and the other end of the support wire 46 is attached to the rack rail 5. As described above, the pinion gear 29 of the drive unit 6 and the rack gear 45 of the rack rail 5 are engaged with each other, and the drive unit 6 and the rack rail 5 are integrated. Accordingly, the scaffold 3 is suspended by the support structure 2 via the rack rail 5 and the drive unit 6. In the present embodiment, the support structure 2 does not suspend the scaffold 3 directly. However, in the present embodiment, when the scaffold 3 is suspended, the scaffold 3 may be suspended through another structure. .

  Here, it is normal that the hollow structure such as the silo 10 does not have an entrance through which a large-scale device can be carried. For this reason, when installing a suspended scaffold, the suspended scaffold is disassembled and each component is carried in from an opening provided in the ceiling of the hollow structure. In this way, the majority of the suspended scaffold is assembled in a hollow structure.

  This also applies to this embodiment. The scaffold 3 and the lifting mechanism 4 are disassembled in advance, and each component is placed in the silo 10 from the opening 12 of the ceiling portion 11 of the silo 10 shown in FIG. Carry in. Each component is assembled in silo 10. For example, the scaffold 3 is carried in through the opening 12 in a state where it is disassembled into a large number of pipes 20 and plates 21 (see FIG. 2). Since the rack rail 5 is formed by connecting a large number of small pieces 8 (see FIG. 1), the rack rail 5 is carried through the opening 12 in a state of being disassembled into small pieces 8 units.

  In the support structure 2, the inner support body 31 and the connection body 32 arranged inside the silo 10 are similarly carried into the silo 10 from the opening 12. These are assembled in the silo 10 and connected to the outer support 30. Therefore, most of the suspended scaffolding 1 is assembled in the silo 10. The assembling work in the silo 10 may be performed, for example, on a work table provided at the lower part of the silo 10 and the assembly may be lifted upward.

  The opening 12 is an existing opening originally formed in the silo 10. When the support structure 2 of this embodiment is used, the suspension scaffold 1 can be installed even if the opening 12 is located away from the center of the ceiling portion 11. Hereinafter, the support structure 2 will be specifically described.

  FIG. 4 is a side view of the support structure 2 of the present embodiment, and corresponds to an enlarged view of the support structure 2 of FIG. The support structure 2 is mainly composed of an outer support 30, an inner support 31 and a connecting body 32. The outer support 30 extends outside the silo 10 in the diameter direction of the silo 10 (arrow d direction). The inner support 31 extends in the diameter direction of the silo 10 (arrow d direction) inside the silo 10. The connecting body 32 connects the outer support body 30 and the inner support body 31 through the opening 12. A pedestal 33 is interposed between the outer support 30 and the ceiling portion 11 of the silo 10.

  The support structure 2 can be disassembled into three parts: an outer support body 30, an inner support body 31 and a connecting body 32. As shown in FIG. 4, the outer support 30 is disposed outside the silo 10, the inner support 31 is disposed inside the silo 10, and the coupling body 32 is disposed both inside and outside the silo 10. . In order to assemble the support structure 2 as shown in FIG. 4, the inner support 31 and the coupling body 32 are disassembled and are carried into the silo 10 in advance.

  FIGS. 5A and 5B are diagrams illustrating a carrying-in process of the disassembled support structure 2, FIG. 5A shows a carrying-in process of the inner support 31, and FIG. 5B shows a carrying-in process of the coupling body 32. FIG. 5C shows a state where the inner support body 31 and the coupling body 32 are assembled. In the present embodiment, an example will be described in which a part to be carried into the silo 10 is placed on a work table provided in the lower part of the silo 10 and assembly work is performed on the work table.

  As shown in FIG. 5A, the inner support 31 is passed through the opening 12 and the inner support 31 is carried into the silo 10. The loaded inner support 31 is placed on a work table below the silo 10. Subsequently, the connecting body 32 is passed through the opening 12, and the connecting body 32 is carried into the silo 10 and placed on the work table below the silo 10. The carrying-in order of the inner support 31 and the coupling body 32 may be reversed. On the work table in the silo 10, the inner support body 31 and the coupling body 32 are assembled to form an L-shaped assembly as shown in FIG.

  FIG. 6 shows an example of a connection structure between the inner support body 31 and the connection body 32. FIG. 6 corresponds to an enlarged view of part a in FIG. The inner support 31 is sandwiched between the support plate 35 and the attachment plate 36, and is sandwiched between the attachment plate 37 and the attachment plate 38. The coupling body 32 is sandwiched between the support plate 35 and the attachment plate 39. In this state, the bolt 51 is inserted through the attachment plate 36 and the hole (not shown) of the inner support 31 and the hole of the support plate 35, and the nut 52 is fastened to the bolt 51. Similarly, in other hole portions, nuts 52 are fastened to bolts 51 inserted into the other holes. Further, also in the portion b of FIG. 4, the nut 52 is fastened to the bolt 51 that is similarly inserted through each hole. In this way, the inner support body 31 and the connection body 32 are connected to form an L-shaped assembly shown in FIG.

  The L-shaped assembly is lifted toward the opening 12 to connect the connecting body 32 to the outer support 30. The connecting portions are the c portion and the d portion in FIG. 4, and the connecting structure is the same as the a portion. The connection structure in the a to d portions is an example, and other connection structures may be used as long as assembly and disassembly are possible.

  Moreover, although the L-shaped assembly has been described as an example of assembling inside the silo 10, it may be assembled in advance outside the silo 10. If the opening 12 is large, the L-shaped assembly can be carried into the silo 10 through the opening 12. Whether the L-shaped assembly is assembled inside or outside the silo 10, the support structure 2 can be easily assembled. That is, by connecting the inner support body 31 and the connecting body 32 in advance to form an L-shaped assembly, the connecting work between the inner support body 31 and the connecting body 32 is performed in a state where the inner support body 31 and the connecting body 32 are suspended. Is no longer necessary.

  In FIG. 4, the base 33 and the outer support 30 are not joined at the time when the connecting body 32 is connected to the outer support 30. For this reason, alignment when connecting the connecting body 32 and the outer support body 30 can be performed by appropriately shifting the outer support body 30 on the pedestal 33. In addition, after the support structure 2 is assembled, the position of the entire support structure 2 can be adjusted. As described above, the pedestal 33 is not joined to the outer support 30 during the installation process of the support structure 2, but this state may be maintained even during use of the suspended scaffold 1 thereafter.

  Further, the pedestal 33 may be joined to the outer support 30 during the installation process. Even in this case, as long as the pedestal 33 and the ceiling portion 11 are not joined, it is possible to align the connection body 32 and the outer support body 30. Furthermore, it is good also as a structure which mounts the outer support body 30 in the ceiling part 11 directly, without using the base 33. FIG.

  FIG. 7 shows a cross-sectional view taken along line AA of the inner support 31 shown in FIG. A trolley 40 that is a locking means is attached to the inner support 31. A pair of rollers 41 of the trolley 40 is placed on the bottom 33 of the inner support 31 having an H-shaped cross section. As a result, the trolley 40 can move in the longitudinal direction of the inner support 31 (see FIG. 4) while the roller 41 rotates. According to this configuration, the position adjustment in the horizontal direction (diameter direction of the silo 10) of the scaffold 3 suspended from the support structure 2 is facilitated.

  In FIG. 7, a wire 46 is attached to the hanging part 42 of the trolley 40. As shown in FIGS. 1 and 4, the rack rail 5 is suspended from the wire 46, and the drive unit 6 and the scaffold 3 are suspended integrally with the rack rail 5 as illustrated in FIG. 1. That is, the support structure 2 is a portion that becomes a foundation for suspending the scaffold 3. In this configuration, as shown in FIG. 4, a load F acts on the inner support 31 downward, and a moment M that tries to rotate the inner support 31 acts. On the other hand, the outer support 30 extends in the diameter direction of the silo 10 and is supported by a pedestal 33. In this case, reaction forces R1 to R4 act on the outer support 30, so that the balance with the load F and the moment M is maintained, and the support structure 2 is maintained in a stable stationary state.

  The length ratio between the outer support 30 and the inner support 31 in the support structure 2 may be determined as appropriate. In this case, it is only necessary to prevent the rotation due to the moment even when the load of the suspended portion increases. For this purpose, referring to FIG. 4, it is preferable that the end 30 a of the outer support 30 is located outside the end 31 a of the inner support 31 in the diameter direction d of the silo 10. According to this configuration, the fulcrum P2 of the outer support 30 can be arranged outside the load application point P1 of the inner support 31 in the diameter direction d of the silo 10, which is advantageous for preventing rotation. The end 31a of the inner support 31 is the end of the suspended portion on the load application point P1 side, and the end 30a of the outer support 30 is the end of the inner support 31 on the end 31a side. is there.

  As described above, according to the support structure 2 according to the present embodiment, even if the opening 12 is located at a position away from the center of the ceiling portion 11 of the silo 10, the opening 3 is used as it is, and the scaffold 3 is stably provided. Can be hung.

  The shape of the component parts of the support structure 2 is not limited to the shape of the embodiment. That is, the outer support body 30 and the inner support body 31 should just be formed so that it may extend in the diameter direction of a hollow structure. The connection body 32 may be formed so that the outer support body 30 and the inner support body 31 can be connected.

  Moreover, in the said embodiment, although the latching means to the inner support body 31 is made into the trolley 40, it is trying to adjust the position of the scaffold 2 in the horizontal direction, but it is sufficient if the position where the scaffold 2 is suspended can be adjusted. May have other configurations. For example, the trolley 40 may be omitted, and the support wire 46 may be used as a locking means so that the locking position of the support wire 46 can be adjusted on the inner support 31 side.

DESCRIPTION OF SYMBOLS 1 Suspended scaffold 2 Support structure 3 Scaffold 4 Lifting mechanism 10 Silo 11 Ceiling part 12 Opening 30 Outer support body 31 Inner support body 32 Connection body 33 Base

Claims (7)

A support structure for a scaffold disposed inside a hollow structure,
The hollow structure has an opening formed in the ceiling portion at a position away from the center of the ceiling portion,
When the support structure is installed in the hollow structure,
Outside the hollow structure, an outer support that extends in the diameter direction of the hollow structure;
Inside the hollow structure, an inner support that extends in the diameter direction of the hollow structure;
A connecting body for connecting the outer support and the inner support through the opening;
The scaffold support structure, wherein a locking means for suspending the scaffold is attached to the inner support.   The scaffold support structure according to claim 1, further comprising a pedestal interposed between the outer support and the ceiling.   The scaffold support structure according to claim 1, wherein the locking means can be adjusted in position in a diameter direction of the hollow structure. A suspension scaffold installation method for installing a suspension scaffold on a hollow structure,
The hollow structure has an opening formed in the ceiling portion at a position away from the center of the ceiling portion,
When the support structure for suspending the scaffold is installed in the hollow structure,
Outside the hollow structure, an outer support that extends in the diameter direction of the hollow structure;
Inside the hollow structure, an inner support that extends in the diameter direction of the hollow structure;
A connecting body for connecting the outer support and the inner support through the opening;
The inner support is previously carried into the hollow structure through the opening,
The inner support and the outer support disposed outside the hollow structure are connected via a connecting body, and the support structure is assembled.
The suspension scaffold is installed by attaching a locking means for suspending the scaffold to the support structure to install the suspension scaffold.   5. The assembly according to claim 4, wherein an assembly in which the inner support body and the connection body are connected is formed inside or outside the hollow structure before the connection body and the outer support body are connected. 6. How to install a suspended scaffold.   The suspension according to claim 4 or 5, wherein a position of the outer support is adjusted when the outer support and the connection body are connected by interposing a pedestal between the outer support and the ceiling portion. How to install the scaffold. The installation method of the suspension scaffold in any one of Claim 4 to 6 which adjusts the position which suspends a scaffold by adjusting the position of the said latching means in the diameter direction of the said hollow structure.

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