JPH01190876A - Scaffold device for concrete column forming device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a scaffolding device for forming a concrete column having a bifurcated branch part used for, for example, a bridge support.

[Prior Art] For example, as shown in FIGS. 6 and 7, when constructing a bridge using concrete columns having bifurcated watershed sections as supports, the bridge whose entirety is designated by the reference numeral 1 is , a main body 2 used as a road, a base 3.3 that supports this main body 2, and a support 4 formed above the base.
．． 4, and wires 5 for supporting the pillars 4.4. The struts 4 are formed to strengthen the structure of the bridge 1 by lifting the main body 2 with wires 5, and to improve the overall appearance of the bridge.

The pillar 4 is formed by assembling steel frames and pouring concrete, and its shape is shown in FIG. In FIG. 7, the strut 4 has left and right legs 6.7 extending diagonally, and a portion where the legs 6.7 join, in other words, a diversion portion 8 that is divided into two, and an upper portion of the diversion portion 8. and a vertical portion 9 extending vertically, and the plurality of wires 5 . . . are not shown in FIG. 7.

To form the pillar 4, first, a steel frame is assembled into a predetermined shape corresponding to the shape of the pillar 4, and then concrete 1 to 3 is poured. In order to install the formwork when pouring concrete, conventionally it was necessary to erect a gigantic scaffold that surrounded the entire assembled steel frame and then pour concrete.

However, building a huge scaffolding that surrounds the entire assembled steel frame requires a great deal of effort. Furthermore, most of the work for assembling the scaffolding is done manually, resulting in high labor costs, and as a result, the cost for forming the supports 4 also increases.

On the other hand, as shown in FIG. 2, for example, a scaffold 10 of a certain length is constructed so that it can be lifted up from above the steel frame and moved, a formwork is installed on a part of the steel frame, and concrete 1 is poured. After setting the scaffold 10, lift it upward by a certain distance,
A technique has been proposed in which formwork is installed in a separate area and concrete is poured (the so-called climbing up method). By using this climbing method, there is no need to erect huge scaffolding that surrounds the entire steel frame, so it is suitable for pouring concrete for vertically extending columns.

However, when using the climbing up method, although it is possible to cast concrete on a single column extending vertically, the column has a bifurcated branch section 8 as shown in Figure 7. It cannot be applied to concrete pouring. As shown in FIG. 2, below the diversion section 8, the inner scaffold of the scaffold 10 for the leg section 6 and the inner scaffold of the scaffold for the leg section 7 merge and interfere with each other. This is because it becomes impossible to pull up the scaffolding for the leg portions 7 upward.

In the past, when forming a column with a bifurcated branch, it was necessary to assemble a scaffold that would surround the entire assembled steel frame, even though the work cost was high.

Therefore, in Japanese Patent Application No. 62-254713, the present applicant proposed a method for constructing a concrete support column with a bifurcated part, without requiring the work of assembling a gigantic scaffold that would surround the entire assembled steel frame. 1 - To perform pouring work,
The scaffolding is gradually pulled upward along the legs of the pre-assembled steel frame, and concrete 1 is poured from below the legs to the diversion area.
・The step of placing a connecting scaffold above the part where the scaffolding on the inside of the leg joins, and the step of pulling up the scaffolding on the outside of the leg, and the step of assembling the connecting scaffold above the part where the scaffolding on the inside of the leg joins, A concrete column comprising the steps of: placing concrete in a diversion section that has been removed; and placing concrete in the vertical section while gradually lifting the scaffolding outside the leg upwards along the vertical section above the diversion section. A forming method was proposed.

By the way, in the equipment for carrying out this construction method, the outer surfaces of the diversion section 8 and the vertical section 9 are bent at a continuous bending section 8A, so that the outer surfaces of the diversion section 8 and the vertical section 9 are bent at a continuous bending section 8A. The scaffold 10 that has been pulled up cannot be pulled up along the bent portion, and therefore
There is a problem with this that requires a separate scaffolding.

[Object of the Invention] Accordingly, an object of the present invention is to provide a scaffolding device for a concrete column forming device that can also be used for the vertical part of a column.

[Structure of the Invention] According to the present invention, when forming a concrete column having legs that are bifurcated from a diversion part and extend diagonally, the scaffolding is gradually pulled upward along the legs of the steel frame that has been assembled in advance. Concrete is poured from the bottom of the legs to the branch, and a connecting scaffold is assembled above the part where the scaffolds on the inside of the legs meet, and the scaffolding on the outside of the legs is pulled up, and the connecting scaffold and the legs are assembled. Concrete 1 is placed in the diversion area surrounded by the outer scaffolding, and the scaffolding on the outside of the legs is gradually pulled upward along the vertical part above the diversion part, and concrete 1 is poured into the vertical part. In a concrete column forming device to be cast, multiple stages of scaffolding boards of the outer scaffolding are pivotally connected to a frame guided by the legs, and the scaffolding boards are held horizontally between the scaffolding boards and the frame. In addition to providing a holding means, the frame is divided into sections for each predetermined stage of the scaffold board, the sections are connected to each other in a flexible manner, and an auxiliary guide is detachably attached to the leg side of the connecting portion. The means have been set up.

[Operations and Effects of the Invention] Therefore, when the scaffold plate on the rise step of the outer scaffold reaches near the bottom of the bending part, the auxiliary guide means are attached to the upper and lower ends of the upper section of the frame, and the holding means is removed and the scaffold is moved upward. Pull up. Then, the end of the auxiliary guide means is sequentially guided from the branch part, through the bent part, and to the vertical part, and the scaffold is pulled upward. When the lower end of the upper section of the frame reaches the bending part, a holding means is attached to hold the scaffolding board of the upper section horizontally, and concrete pouring work for the vertical section is performed.

[Preferred Embodiment] When carrying out the present invention, it is preferable that the frame sections are defined, for example, for each of two stages of scaffolding boards (the uppermost section is one stage).

In carrying out the present invention, it is preferable to use a turnbuckle as the retaining means.

When carrying out the present invention, a bracket and a main guide roller, which are the 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 a branch part, and the auxiliary guide means are the bracket and the main guide roller. Preferably, the auxiliary guide rollers are oval shaped, the auxiliary guide rails are attached to the vertical portions, and the auxiliary guide rollers are guided by the main guide rail and the auxiliary guide rails.

In practicing the invention, it is preferred that each end of each scaffolding board be connected by a connecting rod pivotally attached to its respective outer end. In this way, the scaffold board from which the holding means is removed when the scaffold is raised can be held horizontally by the scaffold board of the step from which the holding means is not removed.

[Example] Hereinafter, the present invention will be described in detail 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 added to the upper part and removed at the lower part as concrete is poured.

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

The frame 14 is divided into four frame sections (hereinafter referred to as sections) 14A, 14B, 14C, and 14D for each scaffold board of multiple stages (in the illustrated example, there are two stages, and the top is one stage), The upper end of the center pole jack 24 attached to the steel frame 9A of the vertical section 9 is connected to the Gebinde Stave 25.
and is guided to the main guide rail 12 via a main guide means consisting of a bracket 16 protruding from the upper and lower ends of the section 14D toward the leg 6 side, and a main guide roller 17 pivotally supported at the end of the bracket 16. , so that it can be raised and lowered freely.

In FIG. 1, the sections of the frame 14], 4. A~
14D are flexibly connected to each other at bin joins 1 to 18A, 18B and 18C.

Taking the section 14C as an example, the scaffolding boards 15D and 15E each have a bracket 19 that has the same protruding height as the bracket of the binge joint provided in the center of the section 14C,
It is pivotally connected to Binjong Inn 1~18C. and,
Turnbuckles 20.20, which are holding means, are stretched between the intermediate parts of the scaffolding boards 15D, 15E and the section 14C, and the turnbuckles 20 hold the scaffolding boards 15D, 1
5E is held horizontally.

On the other hand, on the section 14C side of the pin joint 18B, there is an auxiliary guide means consisting of a bracket 21 and an auxiliary guide roller 22 which is pivotally supported at the end of the bracket 21 and engages with the main guide frame 12, as will be described later. It is detachably installed. The outer ends of each of the scaffolding boards 1.5A to 15G are connected to connecting rods 23, 23 and 23, which are pivotally connected to the outer ends of the scaffold boards 1.5A to 15G.
... are connected.

Next, the procedure for raising the scaffold 13 will be explained with reference to FIGS. 2 to 5.

As shown in FIG. 2, the topmost scaffolding board 15A of the scaffolding 13
When the center hole jack 24 rises to near the bottom of the bent portion 8A, move the center hole jack 24 to the steel frame 9 of the vertical portion 9, as shown in the third figure.
Move it to the top of A. Next, the main guide rail 12 is added to the bent part 8A, the lower main kite rail 12 is removed, and an auxiliary kite rail 12 similar to the guide rail 12 is installed.
A is attached on the extension line of the main kite rail 12 on the outer surface of the poured concrete of the vertical part 9. Next, the auxiliary kite rollers 22, 22 are attached to the bin joins 1-18A, 18B, and the turnbuckles 20 of the sections 14A, 14B are removed.

Next, as shown in Figure 4, center hole jack 2
4 and pull up the scaffolding 10 from the Gebindestave 25. Then, the upper auxiliary guide roller 22
The lower auxiliary kite roller 22, which is continuously guided by the main kite rail 12 and the auxiliary guide rail 12A, moves upward while being guided by the main kite rail 12. During this time, the scaffolding boards 15A to 15C are held parallel to each other by the section 14A and the connecting rods 23, 23, and the distance between them increases.

As a result, the section 14 moves upward while gradually decreasing the inclination angle θ. When the sections 14A and 14B are finally parallel to the auxiliary guide rail 12A as shown in FIG.
．． 20 and held in compartments 14A, 1, 4B.

When the concrete placement of the vertical section 9 using the scaffolding boards 15A to 15C is completed, the auxiliary guide roller 22 is attached to the pin joint 18c, and the scaffolding 13 is pulled up in the same manner as described above, and the sections 14A to 14C are positioned on the side of the vertical section 9. ,
Concrete 1 is placed further above the vertical section 9.

[Summary 1] As explained above, according to the present invention, when the second-most scaffold plate of the scaffold reaches near the bottom of the bend, auxiliary guide rollers are attached to the top and next frame sections, and the main guide rail The scaffold can then be guided by an auxiliary kite rail attached to the outer surface of the vertical section to pass through the bent section, and the scaffold can be pulled upwards smoothly to perform concrete pouring on the vertical section.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the main parts of an embodiment of the present invention, FIGS. 7 is a front view of a bridge with bifurcated struts; FIG. 7 is a front view of the struts shown in FIG. 6; 4... Support column 6.7... Leg part 8... Diversion part 8A... Bent part 9... Vertical part 12...
・Main guide rail 12A...Auxiliary guide rail
13...Outer scaffolding 14...Frame 14A~
14D... Treem section 1.5A~・15G...
・Scaffolding board 17...Main guide rail 18A to 18C
...Pin joint 20...Turnbuckle
22...Auxiliary guide roller patent applicant Kajima Corporation Agent Patent attorney Satoshi Takahashi Toshikuni Tadashi Takahashi

Claims (1)

[Claims] When forming a concrete column with legs that split into two and extend diagonally from the diversion, the scaffolding is gradually pulled upward along the pre-assembled steel legs while concrete is poured from below the legs to the diversion. Concrete is placed above the part where the scaffolding on the inside of the leg joins, and the scaffolding on the outside of the leg is pulled upward, and concrete is placed in the divided part surrounded by the connecting scaffold and the scaffolding on the outside of the leg. In a concrete pillar forming device, a frame guided by the leg is placed in a concrete pillar forming device that casts concrete on the vertical part of the foot while gradually pulling up the scaffolding outside the leg along the vertical part above the diversion part. A plurality of tiers of scaffolding boards of the outer scaffolding are pivotally attached to the frame, and holding means for holding the scaffolding boards horizontally is provided between the scaffolding boards and the frame, and the frame is attached to each predetermined tier of the scaffolding boards. Scaffolding device for concrete column forming equipment, characterized in that the scaffolding device is defined into sections, the sections are connected to each other in a flexible manner, and a removable auxiliary guide means is provided protruding from the leg side of the connecting portion. .