JP2006307505A - Scaffold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scaffold capable of eliminating the need of stackingly assembling scaffold units in a vertical hole and enabling the easy assembling operation in a short time. <P>SOLUTION: The plurality of scaffold units with floor plates 20 are continuously connected to each other a through connection cable 13 so as to be suspended in the vertical direction. The scaffold unit 12 at the upper end is supported on a supporting tower 15 installed on the vertical hole 14 at a construction site, and the other scaffold units 12 are lowered into the vertical hole 14 so that the plurality of scaffold units 12 can be disposed in the vertical hole 14 so as to be suspended up to near its bottom part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  For example, when constructing deep foundation piles such as road bridges, railway bridges, foundations of building structures, etc., when installing concrete before placing concrete into vertical holes excavated in the ground of the construction site, It is related to the scaffold used.

  Conventionally, as this type of scaffold, for example, one having the following configuration is known. That is, in this conventional configuration, a plurality of scaffold units each including a floor plate, a plurality of support columns erected on the outer periphery of the floor plate, and a top frame supported between the upper ends of the support columns are prepared. And, with this scaffold unit suspended and supported by a crane or the like, it was built into a vertical hole at the construction site and assembled vertically to build a scaffold with a predetermined height corresponding to the depth of the vertical hole .

  However, in this conventional scaffold, it is necessary to carry a large number of scaffold units one by one into the vertical hole and stack and assemble them while positioning them at a predetermined connecting position. There was a problem that it took.

  The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a scaffold that does not need to be stacked and assembled while carrying the scaffold units one by one into the vertical hole, and that can be assembled easily and in a short time.

In order to achieve the above object, the invention according to claim 1 is characterized in that a plurality of scaffold units provided with floor boards are connected via a connecting rope so as to be able to be suspended in the vertical direction. is there.
The invention according to claim 2 is characterized in that, in the invention according to claim 1, the scaffold unit at the lower end is provided with a connecting portion capable of connecting an elevator cable for raising and lowering the scaffold unit. It is.

The invention described in claim 3 is characterized in that in the invention described in claim 1 or claim 2, a handrail is provided on the outer periphery of the connecting rope.
According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the scaffold units are held between the scaffold units in a suspended state. It is characterized in that an interval holding means is provided.

  The invention according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, an additional floor board is detachably provided on the outer periphery of the floor board of the scaffold unit. It is.

(Function)
In the invention according to claim 1, if a support tower or the like is installed on the vertical hole in the construction site, the upper end scaffold unit is supported on the support tower, and the other scaffold unit is lowered into the vertical hole. The plurality of scaffold units are suspended to the vicinity of the bottom of the vertical hole through the connecting rope. Therefore, it is not necessary to stack and assemble a large number of scaffold units one by one in a vertical hole, and the assembly work can be performed easily and in a short time.

  In the invention according to claim 2, a plurality of scaffold units can be easily lifted and lowered within the vertical hole via the lifting / lowering cable in a state where the lifting / lowering cable is connected to the connecting portion provided in the lower-end scaffolding unit. .

  In the invention according to claim 3, the peripheral side upper part of the floor plate of each scaffold unit can be surrounded by a handrail, and the rebar assembling work to the inner peripheral surface of the vertical hole is safely performed on the floor plate of each scaffold unit. be able to.

In the invention according to claim 4, each scaffold unit can be suspended in a state where a predetermined interval is maintained in the vertical hole, and a work space can be secured.
In the invention according to claim 5, by providing an additional floor plate on the outer periphery of the floor plate of the scaffold unit, the diameter of the floor plate can be substantially increased. Therefore, in the vertical hole for a deep foundation pile having a large diameter, Convenient for work.

  As described above, according to the present invention, it is not necessary to stack and assemble the scaffold units one by one in the vertical holes, and the assembly work can be performed easily and in a short time.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, in this embodiment, a plurality of scaffold units 12 for assembling the foundation pile scaffold 11 are suspended in the vertical direction via connecting ropes 13 each consisting of four chains. Concatenated so that it can be moved down. Then, when constructing deep foundation piles such as road bridges, railway bridges, foundations of building structures, etc., as shown in FIG. Install the lower tower 16. In this state, the upper end scaffold unit 12 is supported by the support tower 15, and the upper connection cord 13 is connected to the suspension tower 16, and the other scaffold unit 12 is lowered into the vertical hole 14. As a result, the plurality of scaffold units 12 are suspended to the vicinity of the bottom of the vertical hole 14 via the connecting rope 13, and the foundation pile scaffold 11 having a predetermined height is assembled.

  Further, in the assembled state of the foundation pile scaffold 11, the operator descends from the support tower 15 to the scaffold unit 12 at a predetermined height, and performs the assembling work of the reinforcing bars 17 on the inner peripheral surface of the vertical hole 14. It has become.

  As shown in FIGS. 1 to 5, the scaffold unit 12 includes a floor plate 20 having a substantially circular frame shape, four pillars 21 erected on the floor plate 20 at predetermined intervals, and the pillars 21. It is comprised from the top frame 22 of the plane square frame shape fixedly supported between the upper ends of these. In this configuration, as can be understood from FIG. 1, the scaffold unit 12 on the lower end side is formed so that the lateral width between the top frame 22 and the support column 21 becomes gradually smaller.

  Further, in each scaffold unit 12, an interval holding means is configured by four struts 21, and an engaging portion 23 that can be engaged with the top frame 22 of the lower scaffold unit 12 connected to the lower end of the struts 21. Is provided. Then, in a state where each scaffold unit 12 is suspended in the vertical hole 14, a predetermined vertical distance is maintained between the floor plates 20 of the scaffold units 12 adjacent to each other by the engagement between the engagement portion 23 and the top frame 22. It has come to be.

  As shown in FIGS. 2 and 3, a metal mesh 24 is stretched on the upper surface of the floor plate 20 in each of the scaffold units 12, and an opening 25 for raising and lowering is formed in a part of the metal mesh 24 so that the scaffold unit is vertically adjacent. In FIG. 12, the positions are alternately shifted. A lid plate 26 is attached to the opening 25 of each scaffold unit 12 via a hinge 27 so as to be opened and closed. Corresponding to the opening 25, an elevating ladder 28 is detachably attached between the floor plate 20 and the top frame 22 of each scaffold unit 12.

  As shown in FIGS. 2, 3, and 5, a plurality of fan-shaped additional floor boards 29 are attached to the outer periphery of the floor board 20 of each scaffold unit 12 as necessary. In other words, when the inner diameter of the vertical hole 14 at the construction site is large, as shown in the left half of FIG. 6, an additional floor plate 29 is attached to the outer periphery of the floor plate 20 of each scaffold unit 12 to reduce the work area on the floor plate 20. It is designed to be expanded. On the other hand, when the inner diameter of the vertical hole 14 is small, as shown in the right half of FIG. 6, the rebar 17 is assembled without attaching the additional floor plate 29 to the outer periphery of the floor plate 20 of each scaffold unit 12. To do.

  As shown in FIG.1 and FIG.3, the connection part 30 is provided in the center of the floor board 20 of the scaffold unit 12 of a lower end. Then, as shown in FIG. 4, the lifting / lowering rope 31 is detachably connected to the connecting portion 30, and the lifting / lowering rope 31 is rewound or rolled up by the chain block 32 supported by the hanging tower 16. The unit 12 is lowered or raised with respect to the vertical hole 14.

  As shown in FIGS. 1 and 5, in the suspended state of the scaffold unit 12, a handrail 33 made of a rope is detachably attached between the connecting ropes 13. And by this handrail 33, the circumference side upper part of the floor board 20 of each scaffold unit 12 is surrounded, and the installation operation | work of the reinforcement 17 with respect to the internal peripheral surface of the vertical hole 14 can be performed safely on the floor board 20. FIG. ing. When the extension floor plate 29 is used, a long handrail 33 is used to allow an operator to work on the extension floor plate 29. Therefore, in this case, the handrail 33 hangs slightly in the natural state.

Next, the assembly method of the scaffold 11 for deep foundation piles comprised as mentioned above is demonstrated.
Now, when constructing deep foundation piles such as road bridges, railway bridges, foundations of building structures, etc., as shown in FIG. A tower 15 and a hanging tower 16 are installed. Then, the upper end scaffolding unit 12 is supported by the support tower 15, and the upper end connection cord 13 is connected to the suspension tower 16. Further, the chain block 32 is supported by the hanging tower 16, and the lifting rope 31 extending from the chain block 32 is connected to the connecting portion 30 of the scaffold unit 12 at the lower end.

  In this state, when the hoisting rope 31 is rewound by the chain block 32, the plurality of scaffold units 12 are lowered into the vertical hole 14 and suspended to the vicinity of the bottom of the vertical hole 14 via the connecting rope 13, and have a predetermined height. The foundation pile scaffold 11 is assembled. Then, the lifting / lowering line 31 is removed from the connecting part 30 and wound up to the upper retracted position.

  In the assembled state of the foundation 11 for deep pile, the operator descends from the supporting tower 15 to the floor plate 20 of the scaffold unit 12 at the required fixed height by using the ladder 28, and against the inner peripheral surface of the vertical hole 14. The rebar 17 can be assembled.

  Thus, in the scaffolding of this embodiment, since the plurality of scaffolding units 12 are connected so as to be suspendable via the connecting ropes 13, a large number of scaffolding units 12 are carried into the vertical holes 14 one by one. There is no need to assemble and assemble the scaffold unit 12 to the vicinity of the bottom of the vertical hole 14. Therefore, the assembly work of the scaffold can be performed easily and in a short time.

  Moreover, when removing a scaffold from the inside of the vertical hole 14, the lifting / lowering line 31 is lowered | hung and it connects with the connection part 30. FIG. And if the hoisting rope 31 is wound up, many scaffold units 12 can be continuously pulled up in the suspended state, and the removal work can be performed easily and in a short time.

The effects of the embodiments described above are listed as follows.
-It is not necessary to assemble and assemble a large number of scaffold units one by one into the vertical hole 14, and the assembly work can be performed easily and in a short time.

  A plurality of scaffold units 12 can be easily raised and lowered within the vertical hole 14 via the lifting / lowering line 31 in a state where the lifting / lowering line 31 is connected to the connecting portion 30 provided on the lower-end scaffolding unit 12.

  The upper part of the peripheral side of the floor plate 20 of each scaffold unit 12 can be surrounded by a handrail 33, and the assembling work of the reinforcing bars 17 to the inner peripheral surface of the vertical hole 14 can be performed safely on the floor plate 20 of each scaffold unit 12. it can.

-Each scaffold unit 12 can be suspended in a state where a predetermined interval is maintained in the vertical hole 14, and a work space can be secured.
-By providing the additional floor plate 29 on the outer periphery of the floor plate 20 of the scaffold unit 12, the diameter of the floor plate 20 can be substantially increased. Therefore, it is convenient for work in the vertical hole 14 having a large diameter.
(Example of change)
In addition, this embodiment can also be changed and embodied as follows.

In the embodiment, the scaffold unit 12 is lifted and lowered via the connecting rope 13 without using the lifting rope 31.
In the above-described embodiment, as the connecting rope 13, other means such as a zile are used in addition to the chain.

The longitudinal cross-sectional view which shows the scaffold of one Embodiment in the accommodation state. Sectional drawing in the 2-2 line of FIG. Sectional drawing in the 3-3 line of FIG. The fragmentary sectional view which shows the scaffold of FIG. 1 in a suspended state. The fragmentary sectional view which expands and shows a part of FIG. The expanded sectional view in the 6-6 line of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Scaffolding for deep foundation piles, 12 ... Scaffolding unit, 13 ... Connecting cable, 14 ... Vertical hole, 15 Supporting tower ..., 20 ... Floor board, 21 ... Column, 22 ... Top frame, 23 ... Engagement part, 29 ... Expansion Floor plate, 30 ... connecting portion, 31 ... lifting rope, 33 ... handrail.

Claims (5)

A scaffold characterized in that a plurality of scaffold units provided with floor boards are connected via a connecting rope so as to be suspended in the vertical direction. The scaffold according to claim 1, wherein the lower end scaffold unit is provided with a connecting portion that can removably connect an elevator cable for raising and lowering the scaffold unit. The scaffold according to claim 1 or 2, wherein a handrail is provided on an outer periphery of the connecting rope. The scaffold according to any one of claims 1 to 3, further comprising a gap holding means for holding a gap between the scaffold units in a suspended state. . The scaffold according to any one of claims 1 to 4, wherein an additional floor plate is detachably provided on the outer periphery of the floor plate of the scaffold unit.

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