JPH03103569A - Formwork device for column construction - Google Patents

Abstract

PURPOSE:To shorten the period of construction by a method in which a column- constructing formwork consisting of a cylindrical base and four struts is raised on the basis of an existing part of column by means of a drive mechanism and set on a concrete-placing position. CONSTITUTION:A column-constructing formwork 1 is made up of a cylindrical formwork base 10 defining the cross section of a column and a framed strut 20 consisting of four guide rods 21 to support the base 10 in an axially sliding manner. The strut 20 is strongly fixed to an existing part of column 2 by means of a clamp band 23 provided to the lower end of the strut 20. Opening and closing sheathing boards 13A and 13B and a fixed sheathing board 11 are provided to the base 10 vertically divided into two sections, and a clamp band 16 and an expandible jack 30 are provided to the lower ends of the boards. The base 10 and the strut 20 are relatively slid by the expanding and contracting action. The formwork can thus be automatically set on a desired place.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a formwork device for constructing a column, and in particular, a formwork device for building a column suitable for use in a column of a frame having multiple floors. It is related to.

[Conventional technology]

If the pillars that make up the frame are RC construction (reinforced concrete construction) or SRC construction (steel-reinforced concrete IJ-1 construction), after the pillar reinforcement is installed, concrete is poured to bury the reinforcement. Build a pillar by doing this.

Conventionally, this concrete pouring work involves constructing a formwork to surround the column reinforcing bars to be buried, pouring concrete to a predetermined height within the assembled formwork, and removing the formwork after the poured concrete has hardened. This is done by demolding.

For example, in the case of a rectangular column, the formwork at that time is a weir plate of a predetermined length (
A box shape is formed by combining multiple pieces of weir plates, and the combined weir plates are fixed with bata or bolts. After the concrete poured inside has hardened, the formwork is dismantled (demolded).
Then, move it to the upper part where concrete is to be poured next. The assembly, disassembly, and rearrangement of the formwork above are performed manually on the construction scaffold.

[Problem to be solved by the invention]

By the way, in recent years, there has been a movement in the construction industry to automate the construction of building frames in order to deal with the serious labor shortage and to significantly shorten construction times, and several technologies have already been proposed. .

In attempting to automate this kind of frame construction, especially for frames constructed using concrete such as RC or SRC structures, the bottleneck is how to systemize the formwork work for pouring concrete. becomes.

The present invention has been made in view of the above circumstances, and is a method for performing formwork work when constructing concrete columns, that is, a series of work such as installing, demolding, and moving the formwork, without any or almost no human intervention. The purpose of the present invention is to provide a formwork device for constructing pillars that can be used.

[Means to solve the problem]

The formwork apparatus for constructing a column according to the present invention includes a formwork body formed into a cylindrical shape with a cross-sectional shape of a column to be constructed, and a plurality of formwork bodies that support the formwork body slidably in the axial direction. and a column assembled into a frame shape by a book guide rod, and the column and the formwork body each have a fixing means for fixing the column and the formwork body to an existing part of the column, and A drive mechanism is interposed between the column and the formwork body to take a reaction force from one of the column and the formwork body, which is fixed to the existing part of the column to be constructed, and lift the other.
In addition, an opening that can be opened and closed is formed in the beam passing portion of the formwork body that interferes with the beam of the frame when the formwork body moves.

. Further, the drive mechanism is constituted by a telescoping jack that is provided parallel to the guide rod, one end of which is connected to the lower end of the support column, and the other end of which is connected to the lower end of the form body. Alternatively, it is preferable to use a rack formed on the guide throat along the longitudinal direction thereof, and a pinion gear provided on the form body side and driven by meshing with the rack.

[Effect]

With the form body set at the lowest position of the support, concrete is poured into the form body. In this state, the pillar is fixed to the existing part of the pillar, and the poured concrete is added to the existing part.

After the poured concrete has hardened, when the drive mechanism is operated with the fixing means for the formwork main body released, the formwork main body rises along the supports (guide rods), and demolding is performed at the same time.

Concrete is poured into the formwork body again at the elevated position. This concrete will be added on top of the previously poured concrete.

After the added concrete has hardened, the fixing means of the formwork body is fastened to fix the formwork body to the hardened poured concrete, the fixing means of the pillars is released, and the drive mechanism is actuated, This time, the support column rises relative to the form body and returns to the initial state, that is, the state in which the form body is located below the support column.

After that, by repeating the above operation, Conch J-1-
The entire formwork device can be raised while adding to the existing part.

〔Example〕

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

1 to 4 show an embodiment of a column construction formwork apparatus according to the present invention, and show an example of a column construction formwork apparatus applied to a column having a rectangular cross section.

This column construction formwork device (hereinafter abbreviated as “formwork device”) 1 includes a formwork main body 10 shaped into a cylinder with the cross-sectional shape of the column to be constructed, and the formwork. It has a pillar 20 assembled into a frame shape by four guide rods 2l that support the main body 10 so as to be slidable in the axial direction.

As shown in FIG. 1, the guide rods 21 of the pillar 20 are set at intervals that are located at the four corners of the pillar 2 to be constructed. Further, in this embodiment, the length of the column 20 in the longitudinal direction is set to be equal to or longer than one story of the frame constructed from the columns constructed by the present formwork apparatus 1. A tightening band 23 that is tightened by a bolt 22 is formed at the lower end of the column 20, and the column 20 is firmly fixed to the existing portion of the column 2 by this tightening band 23.

The form body 10 is slidably provided along the four guide rods 2l that constitute the support column 20, and forms a cylindrical box with an open bottom and top.

The cross-sectional shape of the hollow part of the form body 10, which becomes the cylindrical box, is shaped to the cross-sectional shape of the column 2 to be formed. Also,
This formwork main body 10 is set to be approximately twice as long as the beam of the beam that constitutes the frame together with the columns 2, and is vertically and vertically spaced from the center with respect to the length direction and height direction. The structure is divided into two parts.

Further, as shown in FIGS. 2 and 3, the form body 10 is pivotally supported by fixed weir plates 11 forming the four corners of the box and the guide rods 21, It is composed of openable and closable weir plates 13A and 13B which freely open and close the opening 12 formed between the weir plates 1l from both sides.

FIG. 4 shows the open state of the open/close weir plates 13A and 13B.

Concrete support surface 13 on one opening/closing weir plate 13A
a, that is, a portion that is flush with the inner surface 11a of the fixed weir plate 1l is constituted by a thin plate 14, and the concrete support surface 13b of the other temporary opening/closing weir 13B is configured so as to overlap the back surface of the plate 14. There is.

Furthermore, a tightening band 16 similar to the tightening band 23 provided at the lower end of the column 20 is provided at the lower end of the form body IO.
is constructed integrally with the fixed weir plate l1. code 15
is a bolt that tightens the tightening band 16. In addition,
The tightening band l6 and the tightening band 23 each form spaced apart parts 16a and 23a having the same width as the opening 12 at positions corresponding to the opening l2, and the bolts 22.15 The structure is such that the separating portions 16a and 23a are tightened.

A telescopic jack 30 is interposed between the lower end of the movable column 20 and the lower end of the form body 10, and the telescopic operation of the telescopic jack 30 causes the form body 10 and the movable column 20 to move relative to each other. It is designed to be able to slide. In addition, in FIG. 2, the symbol l7 indicates the opening/closing weir plates 13A, 13B.
During the idle state, these weir plates 1.3A and 13B open and close.
This is a locking mechanism for fixing.

Next, the operation of the column construction formwork device 1 constructed as described above will be explained with reference to FIGS. 5 to 14.

■Formation of pillar base> After constructing the foundation (not shown), as shown in Fig.
Forms the base of...

For the pillar 2, first, a column reinforcing bar 3 which is assembled in a uniform manner and has a height of approximately one story is erected, and then concrete 4 is poured at the base thereof to a height of about 1 m. This concrete 4 is placed by ordinary form work.

Here, the reason why concrete 4 is placed in advance only at the base is that after this, the formwork device 1 (
This is to support the pillar 20).

■ <Installation of formwork equipment> As shown in Fig. 6 or Fig. 1, the lower end of the column 20 is attached to the base of each column 2, 2, . 23. In this state, the telescopic jack 30 is in its most retracted state, and the form body 10 is positioned below the support column 20.

Once the pillars 20, 20, . . . are fixed to the bases of the pillars 2, 2, . However, in this embodiment, the trolley IJ-40. They are connected by a track, that is, a trolley rail 41. Although not shown, each trolley 40 is equipped with, for example, a hoisting device.

Although the formwork apparatus 1 according to the present invention can be operated alone by, for example, forming the fixing part of the support 20, that is, the tightening band 23, to be wide, it is possible to operate the formwork apparatus 1 as a single unit, but several units can be connected to each other as described above. As a result, the centering of the support 20 with respect to the pillar 2 can be reliably performed. In the embodiment, each of the pillars 20 is connected by a trolley rail 4l, and the trolley 40 is made to run along the trolley rail 4l. Although FIG. 6 and the like show a state in which only two adjacent columns 20 are connected, in reality, a large number of columns 20, 20, . . . are connected both vertically and horizontally.

■〈Concrete pouring〉 Once each pillar 20 has been placed on the previously formed column base as described above, concrete 4 is poured into the form body IO and added onto the base (sixth figure).

■<Lifting the formwork body and placing concrete> Once the concrete 4 poured in the above manner has hardened, the formwork body 10 is moved upward as shown in FIG. The formwork main body 10 can be moved upward along the guide rod 2l by extending the extension jack 3o, and the formwork main body 1o is removed from the mold. Formwork body 10 at this time
The rising height of is such that the lower part of the movable formwork 20 slightly overlaps the upper end of the concrete 4 previously cast.

Once the form body 10 is raised to the predetermined position as described above,
Concrete 4 is placed inside the form body 10 so as to add to the part extended in the above process.

However, at this point, the upper half of the form body 1O corresponds to the position where the beams 5 for constructing the frame 9 are to be erected, so the concrete 4 is applied up to the lower half of the form body 10.

<Raising the pillar> When the concrete 4 poured above has hardened, the pillar 20 is raised as shown in FIG.

To raise the column 20, after tightening the tightening band 16 provided at the lower end of the form body 10, loosen the tightening band 23 provided at the lower end of the column 20, and then retracting the telescopic jack 30. Bye.

By tightening the tightening band 16 of the form body 10, the fixed weir plate 11 is firmly pressed against the hardened concrete 4 and fixed, so if the telescopic jack 30 is retracted in this state, the support column 20 The mold body 10 is moved upward by sliding on the mold body 10. Here, in this embodiment, as described above, a large number of columns 20 are connected by the trolley rail 4l, so the columns 20 connected to each other are raised all at once. . Therefore, each telescopic jack 30, 30,...
- is designed so that all its expansion and contraction operations are synchronized.

<Construction of joint section> In the illustrated example, at the above-mentioned time point, a beam 5 is erected on the top surface of the concrete column 4 as shown in FIG. 9. The work of constructing the beam 5 is carried out using the trolley 4 installed above the support column 20.
This can be done efficiently using 0.

Moreover, at this time, the part of the house 2 to which the beam 5 should be connected is
The upper half of the form body 10 that has been moved upward is enclosed. Therefore, in the upper half of the formwork main body 10, the opening 12 is formed by keeping the opening and closing dams 13A and 13B open, and it becomes possible to cross the beams 5 to be connected (Fig. 4). reference)
.

Once the beams 5, 5, etc. have been erected as described above, the column reinforcing bars 3 for constructing the part corresponding to the second floor of the column 2 are installed at the joints, as shown in Fig. 10. Assemble. The column reinforcing bars 3 are also assembled by hoisting them onto the trolley 40.

When the above state is reached, concrete 4 is poured into the form body 10, and once the poured concrete 4 has hardened, the form body 10 is raised as shown in FIG. 1l. At this time, the formwork main body 10 crosses the beams passing through the formwork main body 10 by opening the opening/closing weir plates 13A and 13B in the lower half. On the other hand, for the upper half, the opening and closing weir temporary 13A, 13
By closing B, the opening l2 is closed, and concrete 4 is poured into the upper half of the form body IO.

Thereafter, the support column 20 is raised in the manner described above.

■〈Repetition of the above process〉 From then on, according to the above procedure, repeat the following operations: lifting the formwork body 10 → pouring concrete → after hardening of the poured concrete, lifting the formwork body 10 (removing the mold) → raising the pillars 20. , just extend and construct pillar 2 upwards.

In addition, FIG. 12 shows that the trolley 40 moves floor plates (PC boards, deck plates, etc.) 6, 6, . . . for forming the first floor while the formwork device l is rising.
This figure shows how the floor 7 is being constructed by laying. Also, FIG. 13 shows how the outer wall 8 is attached by a trolley crane 43 running on a track 42 built between the upper ends of the columns 20, similar to the Toro IJ-40, and FIG. The figure shows how the formwork device 1 is then raised while extending and constructing the pillars 2 further upward.

As described above, according to the formwork device 1, the device 1 itself uses the existing portion of the pillar 2 as a foothold to ascend by the drive mechanism, and sets the formwork body 10 at the location where new concrete is to be poured. There is no need to manually assemble and dismantle the formwork. It also becomes possible to eliminate scaffolding work for this purpose. Therefore, the pillar 2 can be constructed extremely efficiently, and the construction period can be shortened and the number of personnel can be significantly reduced.

Further, each of the above-mentioned operations related to the formwork device 1, that is, the tightening and releasing of the tightening bands 16 and 23 and the operation of the telescopic jack 30, can be automated as appropriate, and furthermore, it is also possible to program them. Therefore, if the formwork device l is configured in this way, it becomes possible to realize complete automation of the formwork device.

Furthermore, in the formwork apparatus 1 according to this embodiment, since the opening 12 is closed from both sides by the opening/closing weir plates 13A and 13B, it can be applied to columns having different diameters. That is, if the diameter of the column 2 to be constructed is larger than that of the illustrated example, the interval between the guide rods 2l of the column 20 will increase, and thereby the width of the opening l2 will also increase. (However, in that case, the spacing between the guide rods 21 of the support column 2o is also configured to be adjustable). Therefore, with the above structure, even if the column diameter becomes large, both opening and closing weir plates 13A and 13B are connected to the opening 1.
2 can be closed at any time.

In the embodiment, the driving mechanism is a telescopic jack 30 whose one end is connected to the lower end of the support column 20 and the other end is connected to the lower end of the formwork body 10. The mechanism is not limited to this, and other structures may be used.

As an example, although not shown, the following structure may be mentioned. That is, while at least one of the guide throats 2l is provided with a ranok part along its longitudinal direction,
The form body IO has a groove in which a pinion gear that engages with and drives the rack is mounted. In this structure, it is possible to slide the formwork body 10 along the guide slot 21 by driving the pinion gear, so it is possible to exert the same effect as that of the structure using the telescopic jack 30. . In this configuration, when the support 20 is raised relative to the fixed formwork main body 10 as described in the above step (2), the case where the formwork main body 10 is raised relative to the support 20 as in the above step (2) is different. The driving direction of the pinion gear may be reversed.

Further, in the embodiment, an example was shown in which the present formwork device l was applied to a column 2 formed with a rectangular cross section, but by appropriately setting the shape of the form body 10, a column 2 having other cross-sectional shapes can be applied. Of course, it is also applicable. For example, if the fixed dam plate l1 and the opening/closing dam plates 13A and 13B are formed into an arcuate shape so that the entire form body 10 is shaped into a cylindrical shape, the present invention can be applied to a column having a circular cross section.

〔Effect of the invention〕

As explained above, according to the column construction formwork device according to the present invention, the column construction formwork device itself is lifted by the drive mechanism using the existing part of the column as a foothold, and reaches the location where new concrete is to be poured. Since the formwork body is set, there is no need to manually assemble and dismantle the formwork, and it is also possible to eliminate scaffolding work for this purpose. For this reason,
Concrete columns can be constructed extremely efficiently, shortening the construction period and significantly reducing manpower.

Furthermore, each operation related to the formwork device, such as the fastening/releasing operation of the fixing means and the operation of the drive mechanism, can be automated as appropriate, and can also be driven by program control. When the apparatus is configured in this way, it is also possible to completely automate the formwork work for pouring concrete columns.

[Brief explanation of drawings]

Figures 1 to 3 show an example of the structure of a column construction formwork device according to the present invention, with Figure 1 being an overall perspective view, Figure 2 being an overall side view, and Figure 3 being a horizontal sectional view. , FIG. 4 is a plan view of the formwork device showing the temporary open state of the opening/closing weir, and FIGS. 5 to 14.
The figures explain the operation of the formwork apparatus according to the embodiment, and are elevational views showing the formwork apparatus together with the columns to be constructed. ■・・・・・・Formwork device for column construction, 2・・・・・・
Column, 4... Concrete, 5...
・Beam, 9...Structure, 10...Formwork body, 1...Fixed formwork, 12...
・Opening, 3A, 13B...Opening/closing weir plate, 6・
...Tightening band (fixing means), O...post,
2l... Guide rod, 3... Tightening band (fixing means), 0... Telescopic jack
(drive mechanism).

Claims (1)

[Scope of Claims] 1) A formwork device used in constructing columns formed of poured concrete and constituting a frame, the formwork device being formed into a cylindrical shape to configure the cross-sectional shape of the column to be constructed. It has a formwork main body, and a support that is assembled into a frame shape by a plurality of guide rods that supports the formwork main body so as to be slidable in the axial direction. Each has a fixing means for fixing the frame body to the existing part of the column, and between the column and the formwork body, there is a fixing means for fixing the frame body to the existing part of the column to be constructed among these columns and the formwork body. A drive mechanism is interposed to take a reaction force to one side and raise the other, and the part of the formwork body that passes through the beam, which interferes with the beam of the frame when the formwork body moves, is openable and closable. A formwork device for constructing a column, characterized in that an opening is formed. 2) The driving mechanism is comprised of a telescopic jack that is provided parallel to the guide rod, one end of which is connected to the lower end of the support column, and the other end of which is connected to the lower end of the form body. The formwork apparatus for constructing columns according to claim 1. 3) The drive mechanism is characterized by comprising a rack formed on the guide rod along its longitudinal direction, and a pinion gear provided on the form body side and driven by meshing with the rack. The formwork device for constructing columns according to claim 1.