JP2564165Y2 - Vibrator support device in sliding form method - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supporting a vibrator for compacting cast concrete in a sliding formwork method.

[0002]

2. Description of the Related Art When constructing a concrete structure, a vibrator is used which compacts concrete poured into a mold so that no gap or the like exists. The vibrator has a rod shape and is inserted into concrete to vibrate. The vibrator is carried and used by a worker on a work floor provided along a concrete structure.

[0003] When the concrete structure is a hollow concrete structure such as a silo or a chimney whose horizontal sectional shape and wall thickness continuously change in the height direction, a method of constructing the concrete structure is used. In some cases, a sliding form method is used (JP-A-61-130557). This construction method has a feature that a formwork for placing concrete slides in the height direction on the solidified concrete surface as the construction proceeds, and has a feature that no joint is formed in the solidified concrete.

[0004]

However, since the vibrator is quite heavy and is carried and used by an operator, the operator becomes tired when working for a long time. In addition, the scaffold in the sliding formwork method tends to be narrow, and a long vibrator in the form of a rod is
It was easy to hit or get caught in materials such as the concrete horizontal streaks temporarily placed around, and handling was inconvenient.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a vibrator support device in a sliding formwork method in which the fatigue of an operator is small and the handling of the vibrator is easy. I do.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a method for sliding a hollow concrete structure, the method comprising: A wire guide disposed along the wire guide, a wire passed through the wire guide, a wire tension adjuster for adjusting the tension of the wire according to a change in the perimeter of the concrete structure; And a vibrator for compacting the concrete placed and suspended from the spring balancer.

[0007]

Since the vibrator is suspended via the spring balancer, the weight is not added to the operator. Further, the concrete compacting operation can be performed while moving along the wire.

Further, when not in use, the vibrator can be held in the air in a suspended state via a spring balancer, and can be easily handled without being caught by surrounding materials.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

Hollow concrete structures using the sliding formwork method include silos, chimneys, and piers. One example of such a hollow concrete structure is shown in FIG.
As the construction of the hollow concrete structure 1 progresses and the height increases, the construction frame 3 for performing the sliding formwork method also moves upward. FIG. 2 is an enlarged view of a main part of FIG. FIG. 3 shows FIG. 2 as viewed from the circumferential direction.
In FIG. 3, the left side shows a state when the height of the hollow concrete structure 1 is low, that is, a state at the beginning of construction. The right side shows the end of the tall construction. FIG. 4 is a view of FIG. 3 as viewed from the outside in the radial direction.

This hollow concrete structure 1 is in the form of a tower in the form of a rotating body, in which a tower shaft 5 and a conveyor unit 7 are present at the center.
A radial main beam 9 extending in the radial direction is provided. These main beams 9 can move upward as the construction progresses. A frame 11 is provided for each of the plurality of main beams 9, and a form panel 13 is supported. The form panel 13 slides on the surface of the hardened concrete 15 and moves upward as the construction progresses. A sliding panel 16 is arranged between the adjacent form panels 13 (FIG. 4) so that a change in length between the form panels 13 can be absorbed as the construction progresses.

The frame 11 includes a moving unit 17 that can move in the radial direction with respect to the main beam 9, and a scaffold 19 provided below the moving unit 17. Work floors 21, 23, 24 are provided on the inside and outside of the moving unit 17, the scaffold 19, and the main beam 9 along the periphery of the hollow concrete structure 1, respectively.

At the tip of the hollow concrete structure 1 being constructed, a rod 25 is embedded. The jack 27 attached to the rod 25 raises the moving unit 17 and the like via the gripper 29. The moving unit 17 is provided with a draw roll 31 for changing the position of the moving unit 17 in the radial direction, a carrier roll 33 for adjusting the wall thickness, a gradient setting roll 35 for defining the direction of the tangent to the wall, and the like. ing.

Now, a wire guide 39 (see FIG. 6) is attached to the frame member 37 located above the moving unit 17.
Is provided. Such moving units 17 are provided by the number of the main beams 9 (see FIG. 1), so that the wire guides 39 are arranged along the periphery of the hollow concrete structure 1. The wires 41 pass through these wire guides 39. A safety device 43 called, for example, a bisoratch (manufactured by Fujii Electric Works, Ltd.) of a man-safe system is locked to the wire 41. Since the safety device 43 easily passes through the wire guide 39 as shown in FIG. 6, there is no need to re-lock each time the safety device 43 passes through the wire guide 39.

A spring balancer 47 is suspended from the safety device 43 via an S-shaped bracket 45 as shown in FIG. The vibrator 49 is further suspended by the spring balancer 47. The electric cord 51 for operating the vibrator 49 is automatically wound by a cord reel 53 (for example, a reel automatic winding drum manufactured by Nichido Kogyo Co., Ltd.).

Further, one wire 41 is provided around the hollow concrete structure 1, and the tension is adjusted at the end by a lever block 55 which is a wire tension adjuster as shown in FIG. I have.

The operation of this embodiment will be described below.
An operator 57 inserts the vibrator 49 into the concrete 15 cast on the sliding formwork including the formwork panel 13 and the sliding panel 16 to perform compaction work. The vibrator 49 performs high-frequency vibration to eliminate a gap or the like in the concrete 15 that has been cast. The weight of the vibrator 49 is supported by the spring balancer 47, and the operator 57 can handle the vibrator 49 with a small force. When the vibrator 49 is used, the electric cord 51 is easily unwound by the cord reel 53.

When the position where the compacting operation is performed is changed, if the worker pulls the vibrator 49 suspended via the spring balancer 47 along the wire 41, the safety device 43 moving along the wire 41 is activated. It moves while passing through the wire guide 39. For this reason, workers
It can be easily moved to any position around the hollow concrete structure 1 and work can be performed.

When the use of the vibrator 49 is temporarily stopped, the spring balancer 47 suspends and holds the vibrator 49 in the air. Then, the electric cord 51 is automatically wound by the cord reel 53. At this time,
Even if the worker does not lift the weight of the vibrator 49,
The vibrator 49 can be located in the air position.

As described above, in the compacting work of the concrete 15, the worker does not need to bear the weight of the vibrator 49, and there is no great fatigue even when working for a long time. When the vibrator 49 is not used, the vibrator 49 is placed on the narrow work floor 21.
Need not be held, and can be held hollow via the spring balancer 47. Therefore, the vibrator 49 that is not used does not hit or catch on the material such as the horizontal streaks of the concrete temporarily placed on the work floor 21, and the handling becomes easy.

Further, the electric cord 51 is a cord reel 53.
As a result, the number of workers can be reduced. That is, conventionally, in addition to the worker working with the vibrator 49, another worker was needed to assist with the electric cord 51 of the vibrator 49, but in the present embodiment, by the function of the code reel 53,
Only one worker is needed.

When the concrete 15 is compacted in this way and the cast concrete 15 begins to harden, the entire frame 11 moves in the height direction in order to perform the next concrete placement. That is, the form panel 13 slides on the surface of the concrete 15 using the jack 27 or the like and rises. The moving unit 17 also rises at the same time and moves radially inward along the main beam 9. Formwork panel 1 constituting a sliding form by this
3 becomes small, and the sliding panel 16 (FIG. 4) slides on the form panel 13 to absorb the change in the distance. In this way, a new space is formed in the sliding formwork, and the next concrete casting is performed.

Since the circumference of the hollow concrete structure 1 is reduced, the overall length of the wire 41 is shortened by the lever block 55, and the tension of the wire 41 is adjusted accordingly. With this adjustment, the wire 41 does not slack, so that the vibrator 49 can move normally along the wire 41 via the spring balancer 47 and the safety device 43.

[0024]

[Effect of the Invention] As described above, according to the vibrator support measures in the sliding formwork method of the present invention, the vibrator can be used while suspended in the air via a spring balancer, and all the weight of the vibrator can be used. It does not add to the workforce, and therefore does not cause the workforce to become tired even after long hours of work. Furthermore, since the vibrator can be held in the air via the spring balancer when not in use, the vibrator does not hit or catch on surrounding materials, and is easy to handle.

[Brief description of the drawings]

FIG. 1 is a perspective view of a hollow concrete structure constructed by a sliding form method according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a view in which FIG. 2 is viewed from the circumferential direction, and the right side is a diagram showing a state in which the construction is advanced compared to the left side.

FIG. 4 is a view of FIG. 2 viewed from a radial direction.

FIG. 5 is a diagram showing a main part according to the embodiment of FIG. 2;

FIG. 6 is a diagram showing a part of the operation of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow concrete structure 9 Main beam 11 Frame 13 Form panel 16 Sliding panel 17 Moving unit 19 Scaffold 21, 23, 24 Work floor 25 Rod 27 Jack 29 Gripper 39 Wire guide 41 Wire 43 Safety device 47 Spring balancer 49 Vibrator 51 Electric cord 53 Cord reel 55 Lever block (wire tension adjuster)

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-333773 (JP, A) JP-A-52-2020 (JP, A) JP-A-5-30349 (JP, U) JP-A-5-30349 96310 (JP, U) JP 2-29810 (JP, B2)

Claims (1)

(57) [Scope of request for utility model registration] 1. A wire guide disposed along the periphery of a hollow concrete structure on an upper portion of a frame supporting a sliding form in a sliding form method of a hollow concrete structure, and the wire guide is passed through the wire guide. A wire, a wire tension adjuster that adjusts the tension of the wire according to a change in the perimeter of the concrete structure, a spring balancer movably provided in the middle of the wire, and via the spring balancer A vibrator supporting device in a sliding formwork method, comprising: a vibrator for compacting suspended and poured concrete.