JPH01190875A - Scaffold coupling device for concrete column forming device - Google Patents

Abstract

PURPOSE:To enable accommodation of scaffolds to the shape of a branch part through simple construction and to reduce a construction cost through reduction of a man hour, by a method wherein two scaffolds outside the leg part of a strut are intercoupled through a double expandable pipe provided at both ends with coupling means using a pin. CONSTITUTION:When inner scaffolds 10A and 11A are carried to a branch part 8, pins 25 at the outside of coupling pipes 26 and 27 are pulled off to bring the scaffolds 10A and 11A into a free state. Thereafter, outer scaffolds 10A and 11B are lifted up by means of center hall jacks 15 and 16 and screw bars 17 and 18, and the scaffolds 10B and 11B at an uppermost stage and a next stage are caused to face on the branch part 8. Clevises 23 of double expandable pipes 20 and 20, each formed with inner and outer pipes 21 and 22, are coupled to clevises 24 of the two scaffolds 10A and 11B are intercoupled by means of pins 25 to intercouple the two scaffolds 10B and 11B. The scaffolds 10B and 11B are intercoupled through a different expandable pipe 20 as they are gradually contracted to place concrete in the branch part 8.

Description

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

[Prior Art] For example, when constructing a bridge that uses concrete pillars as supports, as shown in FIGS. 10 and 11, 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 the main body 2, a support 4.4 formed above the base, and a wire 5 for supporting the support 4.4.
・It is composed of. The pillars 4 are formed to strengthen the structure of the bridge 1 by lifting the main body 2 with wires 5, and to improve the beauty of the bridge as a whole.

The pillar 4 is formed by assembling a steel frame and pouring concrete 1, and its shape is shown in FIG. In FIG. 11, the column 4 has left and right legs 6.7 extending diagonally, a portion where the legs 6 and 7 meet, 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. 11.

To form the pillars 4, first, steel frames are assembled into a predetermined shape corresponding to the shape of the pillars 4, and then concrete 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 the concrete.

However, constructing a huge scaffold 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 and moved from above the steel frame, and 8 formworks are placed on a part of the steel frame to form concrete 1. After pouring, the scaffolding 10 is pulled upward by a certain distance,
A technique (so-called climbing up method) has been proposed in which a formwork is installed in a separate part and poured into the concrete 1.

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 11. It cannot be applied to concrete pouring. As shown in FIG. 2, below the diversion section 8, the inner scaffold 10A of the scaffold 10 for the leg section 6 and the inner scaffold 11A of the scaffold 11 for the leg section 7 merge and interfere with each other. This is because it becomes impossible to pull up the scaffolds 10 and 11 upward.

For this reason, when forming a column having a bifurcated branch, it has conventionally been necessary to assemble a scaffold that surrounds the entire assembled steel frame, even though the work cost is high.

Therefore, in Japanese Patent Application No. 62-254713, the present applicant proposes to construct a concrete support column with a bifurcated part, which eliminates the need to assemble a gigantic scaffold that surrounds the entire assembled steel frame. In order to carry out the installation work, the scaffolding is gradually pulled upwards along the legs of the pre-assembled steel frame, and concrete is poured from the bottom of the legs to the diversion area while sagging, and the scaffolding inside the legs is A process of assembling a connecting scaffold above the merging part and pulling the scaffolding on the outside of the leg upwards, and pouring concrete 1 in the diversion area surrounded by the connecting scaffold and the scaffolding on the outside of the leg. We proposed a method for forming a concrete column, which includes the following steps: 1. step and 3. step of gradually raising the scaffolding on the outside of the leg upwards along the vertical section above the diversion section and pouring concrete into the vertical section.

By the way, in the equipment for carrying out this construction method, the shape of the outer surface of the diversion section is such that both outer surfaces of the leg of the concrete column are extended, and the distance between these two sides gradually decreases upward. Therefore, the connecting device that connects both scaffolds on the outside of the leg is required to be able to cope with changes in the connecting length and to have a simple structure.

[Object of the Invention] Accordingly, an object of the present invention is to provide a scaffolding connection device for a concrete column forming device that can correspond to the shape of a diversion section and has a simple structure.

[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 leg to the branch, and a connecting scaffold is assembled above the part where the scaffolds on the inside of the leg join, and the scaffold on the outside of the leg is pulled upward.
Concrete is placed in the diversion area surrounded by the connecting scaffold and the scaffolding on the outside of the leg, and the scaffolding on the outside of the leg is gradually pulled upward along the vertical part above the diversion, and concrete is poured in the vertical part. In the concrete pillar forming apparatus installed, both foot bases on the outside of the leg are connected by a double telescoping pipe, and the double telescoping pipe is provided with a connecting means using a pin.

[Operations and Effects of the Invention] Therefore, in the diversion section, only the foot bases on the outside of the leg are pulled upward and connected by the connecting device, and using the connecting device as a base, the foot bases on the inside of the leg are moved above the part where the foot bases on the inside of the leg join together. A connecting scaffold can be assembled and concrete 1. can be poured in the diversion section. Since the present invention uses a double expandable tube, it expands and contracts according to the distance between the inner and outer surfaces of the merging section, can easily correspond to the shape of the branching section, and has a simple structure.

[Preferred Embodiment] When carrying out the present invention, a double telescoping pipe dedicated to the flow dividing section is used, and the pin connection means includes clevises provided at both ends of the double telescoping pipe and at both leg bases opposite thereto. , and a pin that removably connects both clevises.

When carrying out the present invention, the scaffolds on the inside and outside of the legs are connected by a double telescopic tube, and at least the inner end of the inner cotton tube is provided with a clevis and connected with the clevis of the scaffold with a pin, and at the confluence part, the clevis is connected with the clevis of the scaffold. Remove the pin connection and attach the clevis and connection fittings of the other double pipe.

It is preferable that they be connected via or directly. In this way, the double telescoping tube that connects the inner and outer scaffolds of the leg can be used to connect both foot bases on the outside of the leg at the confluence part, making it possible to eliminate the need for the dedicated telescoping tube.

[Example 1 Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 2 shows the entire concrete column forming device, which consists of inner scaffolds 10A, 11A guided by guide rails 13.14 attached to the inside and outside of the legs 6.7, and outer scaffolds 10B, IIB. , connecting scaffolds 14.14 and 15.15 that connect these two foot bases, and outer scaffold 10B,
A center hole jack 15, 16 attached to the outside of the pillar 4 that pulls up the IIB, and a Gebinde bar 1
7.18.

Among these scaffolds, both scaffolds 10B as described below
, IIB is shown in FIG. In the figure, the double telescopic tube 20 consists of an inner tube 21 with a square cross section and an outer tube 22 in which the inner tube 21 is slidably and tightly housed. Clevises 23.23 are provided at the outer ends of both of these tubes 21.22, and these clevises 23.23 engage with clevises 24.24 provided on the scaffolds 10B and 11B, respectively, and are engaged by pins 25.25. They are detachably connected. And scaffolding 10B,
Both ends of 11B are each two double telescopic tubes 20.20
are connected. In addition, in Fig. 2, the scaffold 10A
, Scaffold 10C1 connecting IOB and IIA, 11B
11C are provided on connecting pipes 26, 27, respectively, and both ends of these connecting pipes 26, 27 are connected to the scaffold by clevises 23, 24 and pins 25 as in FIG.

Next, the effect will be explained.

FIG. 2 shows a state in which the inner scaffolds 10A and IIA are merging below the flow dividing section 8. In this state, the pins 25 on the outside of all the connecting pipes 26 and 27 are pulled out to free the outside scaffold 10A and IOB.

Next, as shown in FIG.
．． 18 to make the outer scaffolds 10B and IIB of the uppermost and next stages face the flow dividing section 8.

Next, as shown in FIG. 4, the clevis 23 of the double telescoping tube 20.20 is connected to the clevis 24 of both foot bases with a pin 25, the double telescoping tube connects both foot bases, and the connecting tube 26.
27 is connected to the outer scaffolds 10B and 11B on the same stage. Then, a connecting scaffold (not shown) is provided based on these double telescoping pipes 20, and concrete is poured in the lower part of the diversion section 8.

Next, while further pulling both foot bases 10B and IIB upward, the double telescoping pipes 20 and 20 are contracted, and both foot bases of the next stage are connected with another double telescoping pipe 20.

In this way, it is possible to easily respond to changes in the shape of the flow dividing section 8 by sequentially contracting the double telescoping tube 20.

FIG. 5 shows another embodiment of the invention, in which a double telescoping tube 2OA
consists of an inner tube 21A and an outer tube 22A, one end of the inner tube 2OA is fixed to the outer scaffolds 10B, 11B, a clevis 23 is provided at the other end, and the inner scaffolds 10A, I
This is an example in which it is provided in the IA and connected to the rev 24 with a pin 25.

In this embodiment, in the state shown in FIG. 6, which is similar to FIG. 2,
Pull out the pin 25 to free the outer scaffolds 10B and 11B. Next, as shown in FIG. 7, the outer scaffolds 10B and 11B with the telescopic tube 2OA connected thereto are pulled upward.

Next, as shown in FIG. 8, the left and right double telescopic tubes 2OA, 2OA of the top and next stages are extended, and the respective clevises 23 and 23 are attached to the pins 2 to the connecting fittings 28 shown in FIG.
5.25 to connect both scaffolds, and the telescopic pipe 2OA of the third stage and below is connected to the inner scaffolds 10A and 11A of the same stage.

In this embodiment, the double telescoping tube 2OA that connects the inner and outer scaffolds can also be used in the flow dividing section 8, making it possible to eliminate the need for the dedicated double telescoping tube 20.

FIG. 9 also shows another embodiment of the present invention, on the other hand (in the illustrated example, a clevis 24 is provided in the double telescoping pipe 20B on the leg 7 side,
In the diversion section 8, the clevis 23 of both pipes 2OA and 20B
．． 24 are directly connected by pins 25. In this embodiment, the connecting fitting 28 shown in FIG. 5 can also be made unnecessary.

[Summary] As explained above, according to the present invention, it is possible to extend and contract a double telescopic tube having a simple structure and connect scaffolds on both sides in accordance with the shape of the flow dividing portion.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the first embodiment of the present invention, FIGS. 2, 3, and 4 are front views illustrating the steps used, and FIG. 5 is a perspective view showing the second embodiment of the present invention. A perspective view to explain,
Figures 6, 7, and 8 are front views illustrating the steps used, Figure 9 is a perspective view showing the third embodiment of the present invention, and Figure 10 is a bifurcated flow dividing section. FIG. 11 is a front view of the bridge shown in FIG. 10. 4... Support column 6.7... Leg part 8... Diversion part 10A, IIA... Inner scaffold 10B, 1. I
B...Outer scaffolding 20.2OA, 20B...Double telescopic pipe 23.24...Crevice 25...Pin 28...Connecting metal patent applicant Kajima Corporation Agent Patent attorney Toshi Tadashi Takahashi Toshikuni 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 column forming device that casts concrete on the vertical part of the foot while gradually pulling up the scaffold on the outside of the leg along the vertical part above the diversion part, concrete is poured on the vertical part. A connecting device for a concrete column forming device, characterized in that the connection is made by a double telescopic pipe, and the double telescopic pipe is provided with a connecting means using a pin.