JPH0759846B2 - Scaffolding equipment for concrete pillar forming equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a scaffolding device for a device for forming a concrete column having a bifurcated flow dividing part, which is used for, for example, a pillar of a bridge.

[Prior Art] For example, as shown in FIGS. 6 and 7, in the case of constructing a bridge using a concrete column having a bifurcated shunt as a pillar, , A main body 2 used as a road, bases 3 and 3 for supporting the main body 2, columns 4 and 4 formed above the base, and wires 5 for supporting the columns 4 and 4 ...
It consists of and. Here, the columns 4 are formed in order to strengthen the structure of the bridge 1 by suspending the main body 2 with the wires 5 ... And to improve the aesthetic appearance of the entire bridge.

The pillar 4 is formed by assembling a steel frame and pouring concrete, the shape of which is shown in FIG. In FIG. 7, the support column 4 includes left and right leg portions 6 and 7 extending obliquely, a portion where the leg portions 6 and 7 join, in other words, a flow dividing portion 8 that is bifurcated, and above the flow dividing portion 8. And a plurality of wires 5 ... Are not shown in FIG. 7.

In order to form the pillar 4, first, the steel frame is assembled into a predetermined shape corresponding to the shape of the pillar 4, and then concrete is poured. Here, in order to install a formwork when pouring concrete, it was conventionally necessary to construct a huge scaffold that surrounds the entire assembled steel frame and then pour concrete.

However, assembling a huge scaffold that surrounds the entire assembled steel frame requires a great deal of labor. Moreover, since most of the work for assembling the scaffold is performed manually, the labor cost is high, and as a result, the cost spent for forming the support column 4 is also increased.

On the other hand, for example, as shown in FIG. 2, after constructing a scaffold 10 of a certain length so that it can be pulled up and moved from above the steel frame, and after placing a formwork on a part of the steel frame and placing concrete A technique (so-called climbing-up method) has been proposed in which the scaffolding 10 is pulled up by a certain distance and a concrete frame is placed in another portion to pour concrete. If this climbing-up method is used, it is not necessary to build a huge scaffold that surrounds the entire steel frame, so it is suitable for concrete pouring of vertically extending columns.

However, when the climbing up method is used, concrete can be placed on a single vertically extending column, but as shown in FIG. 7, a column having a bifurcated flow dividing portion 8 is provided. It cannot be applied to concrete pouring. As shown in FIG. 2, since the inner scaffold of the scaffold 10 for the leg 6 and the inner scaffold of the scaffold for the leg 7 join and interfere with each other below the flow dividing portion 8, the scaffold 10
Also, it becomes impossible to pull up the scaffolding for the legs 7 upward.

Therefore, when forming a column having a bifurcated flow dividing portion, it has conventionally been necessary to assemble a scaffold that surrounds the entire assembled steel frame even if the operation cost is high.

Therefore, the applicant in Japanese Patent Application No. 62-254713 does not require the work for assembling a huge scaffold that surrounds the entire assembled steel frame, but instead uses concrete striking of a pillar having a bifurcated shunt. In order to perform the construction work, the process of placing concrete from the lower part of the leg to the shunt part while gradually raising the scaffold along the leg part of the preassembled steel frame, and the part where the scaffold inside the leg joins Of connecting scaffolding above the base and pulling up the scaffold outside the leg upward, placing concrete in the shunt part surrounded by the scaffold outside the connecting scaffold and the leg, and above the vertical part above the shunt part. The method of forming a concrete column including a step of pouring concrete on the vertical portion of the scaffold outside the leg along the part while gradually pulling it upward.

By the way, in the apparatus for carrying out the construction method, the outer surfaces of the flow dividing portion 8 and the vertical portion 9 are bent at the continuous bent portion 8A,
Therefore, the scaffold 10 that has been pulled up along the outer slopes of the legs 6 and 7 and the flow dividing portion 8 cannot be pulled up along the above-mentioned bent portion, and therefore is different from the vertical portion 9. There is a bug that requires scaffolding.

OBJECT OF THE INVENTION Accordingly, an object of the present invention is to provide a scaffolding device for a concrete column forming device which can be used even for a vertical portion of a column.

According to the present invention, according to the present invention, when forming a concrete column having a leg portion which is bifurcated from the flow dividing portion and extends obliquely, the scaffold is gradually pulled upward along the leg portion of the preassembled steel frame. While placing concrete from the lower part of the leg to the flow dividing part, assembling the connecting scaffold above the part where the scaffolding inside the leg joins, and pulling up the scaffolding outside the leg upwards to connect the connecting scaffold and the leg. Concrete pillar is formed by placing concrete in the shunt section surrounded by the outer scaffolds, and gradually raising the scaffold outside the legs above along the vertical section above the shunt section and placing concrete in the vertical section. In the device, a plurality of steps of scaffolding plates of the outer scaffold are pivotally attached to a frame guided by the legs, and holding means for horizontally holding the scaffolding plate is provided between the scaffolding plate and the frame. At the same time, the frame is defined into sections for each predetermined step of the scaffolding plate, and the sections are flexibly connected to each other.
Detachable auxiliary guide means is projectingly provided on the leg side of the connecting portions.

[Advantageous Effects of the Invention] Therefore, when the uppermost scaffold plate of the outer scaffold reaches near the lower part of the bent portion, auxiliary guide means are attached to the upper and lower ends of the upper section of the frame, and the holding means is removed to raise the scaffold upward. Pull up. Then, the end portion of the auxiliary guide means is sequentially guided from the flow dividing portion to the vertical portion through the bending portion, and the scaffold is pulled upward. Then, when the lower end of the upper section of the frame reaches the bending section, holding means is attached to hold the scaffolding plate of the upper section horizontally, and the concrete pouring work of the vertical section is performed.

[Preferable Embodiments] In the practice of the present invention, it is preferable that the frame sections are defined for each scaffolding plate in two steps (the uppermost section is one step).

In practicing the present invention, the holding means preferably uses a turnbuckle.

In carrying out the present invention, a bracket and a main guide roller that are main guide means are attached to the lowermost section of the frame, a main guide rail that guides the main guide roller is attached to the legs and the flow dividing portion, and the auxiliary guide means is a bracket and It is preferable that the auxiliary guide roller is configured, the auxiliary guide rail is attached to the vertical portion, and the auxiliary guide roller is guided by the main guide rail and the auxiliary guide rail.

In practicing the present invention, it is preferable to connect each end of each scaffold plate with a connecting rod pivotally attached to each outer end. By doing this, the scaffolding plate from which the holding means is removed when the scaffolding is raised,
It can be held horizontally by the scaffolding plate of the step where the holding means is not removed.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 2, a main guide rail 12 is attached to the outer slope of the leg (the left leg 6 is shown in the figure). The main guide rail 12 is designed to be added upward and the lower portion removed according to the pouring of concrete.

The outer scaffold 13 is roughly composed of a frame 14 and a plurality of (seven in the illustrated example) scaffolding plates 15A to 15G attached to the frame 14.

The frame 14 has a plurality of stages (two stages in the example shown, and the top is 1 stage).
Each of the scaffolding boards is defined by four frame sections (hereinafter referred to as sections) 14A, 14B, 14C and 14D, and the upper end of the section 14A is attached to the steel pole 9A of the vertical section 9 of the center pole jack 24. The main guide rail 12 is connected to the main guide rail 12 via a main guide means that is connected to the starve 25 and that is provided from the upper and lower ends of the partition 14D to project toward the leg 6 side and the main guide roller 17 pivotally supported on the end of the bracket 16. It is guided and can be moved up and down freely.

In FIG. 1, the sections 14A to 14D of the frame 14 are flexibly connected to each other by pin joints 18A, 18B and 18C.

Taking the section 14C as an example, the scaffold plates 15D and 15E are pivotally attached to a bracket 19 and a pin joint 18C having the same protrusion height as the bracket of the pin joint provided in the center of the section 14C, respectively. Then, turnbuckles 20 and 20 as holding means are respectively stretched between the intermediate portions of the scaffold plates 15D and 15E and the section 14C, and the scaffold plates 15D and 15E are horizontally held by the turnbuckle 20. .

On the other hand, the bracket is on the section 14C side of the pin joint 18B.
Auxiliary guide means, which is composed of 21 and an auxiliary guide roller 22 that is axially supported by the end of the bracket 21 and engages with the main guide frame 12, is detachably provided as described later. The outer ends of the scaffold plates 15A to 15G are connected by connecting rods 23, 23 ... Which are pivotally attached to the outer ends.

Next, a procedure for raising the scaffold 13 will be described with reference to FIGS.

As shown in FIG. 2, when the uppermost scaffold plate 15A of the scaffold 13 rises up to near the lower part of the bent portion 8A, as shown in FIG.
The center hole jack 24 is transferred to the upper portion of the steel frame 9A of the vertical portion 9. Then, the main guide rail 12 is extended to the bent portion 8A, the lower main guide rail 12 is removed, and the same auxiliary guide rail 12A as the guide rail 12 is attached to the vertical portion 9 of the concrete outer main surface of the main guide rail 12. Install on the extension line. Next, the auxiliary guide rollers 22 and 22 are attached to the pin joints 18A and 18B, and the turnbuckle 20 of the compartments 14A and 14B is removed.

Then, as shown in FIG. 4, the center hole jack 24
And scaffolding 10 is raised by Gevin De Starve 25. Then, the upper auxiliary guide roller 22 is continuously guided by the main guide rail 12 and the auxiliary guide rail 12A, and the lower auxiliary guide roller 22 is guided by the main guide rail 12 and moves upward. During this time, the scaffolding boards 15A to 15C are in the section 14
While being held in parallel by A and the connecting rods 23, 23, the distance between them is increased. As a result, the section 14 moves upward while successively decreasing the inclination angle θ. Finally, as shown in FIG. 5, when the sections 14A and 14B are parallel to the auxiliary guide rails 12A, the scaffold plates 15A and 15C are attached to the turnbuckle 20,
Hold in compartments 14A, 14B at 20.

When the concrete placement of the vertical portion 9 by the scaffolding plates 15A to 15C is completed, the auxiliary guide roller 22 is attached to the pin joint 18c, and the scaffold 13 is pulled up in the same procedure as described above to partition the section 14A.
-14C is located on the side surface of the vertical portion 9 and concrete is placed further on the vertical portion 9.

[Summary] As described above, according to the present invention, when the uppermost scaffold plate of the scaffold reaches near the lower part of the bent portion, the auxiliary guide rollers are attached to the uppermost part and the next frame section, and the main guide rail and the vertical guide rail are attached. It is possible to guide concrete by an auxiliary guide rail attached to the outer side surface of the section, pass through the bent section, and smoothly raise the scaffold upward to perform concrete pouring on the vertical section.

[Brief description of drawings]

FIG. 1 is a front view showing a main part of an embodiment of the present invention, and FIG.
FIGS. 3, 3, 4 and 5 are front views for explaining a scaffold lifting procedure, FIG. 6 is a front view of a bridge provided with columns having two or separate flow dividing parts, and FIG. 7 is FIG. 7 is a front view of the pillar shown in FIG. 6. 4 ... Support post, 6, 7 ... Leg part, 8 ... Dividing part, 8A ... Bending part, 9 ... Vertical part, 12 ... Main guide rail, 12A ...
Auxiliary guide rails, 13 …… Outside scaffolding, 14 …… Frames,
14A-14D …… frame section, 15A-15G …… scaffolding board, 17…
… Main guide rails, 18A-18C …… Pin joints, 20…
… Turnbuckle, 22… Auxiliary guide roller

Claims (1)

[Claims] 1. When forming a concrete column having leg portions that are bifurcated from a shunt portion and extend diagonally, from below the leg portion while gradually raising the scaffolding along the leg portion of the preassembled steel frame. Pour concrete up to the flow dividing part, assemble the connecting scaffold above the part where the scaffolding inside the leg joins, and pull up the scaffolding outside the leg,
Concrete is placed in the shunt section surrounded by the connecting scaffolds and scaffolds outside the legs, and the scaffold outside the legs is gradually pulled up along the vertical section above the shunt section, and concrete is poured into the vertical section. In a concrete pillar forming apparatus to be installed, a plurality of steps of scaffolding plates of the outer scaffolding are pivotally attached to a frame guided by the legs, and a scaffolding plate is held horizontally between the scaffolding plate and the frame. Means are provided, the frame is divided into sections for each predetermined step of the scaffolding plate, the sections are flexibly connected to each other, and the auxiliary guide means is attachable / detachable to / from the leg portion side of the connecting portions. A scaffolding device for a concrete column forming device, which is characterized in that it is provided with a protrusion.