JP2829363B2 - Formwork equipment for pillar construction - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a column-forming formwork device, and more particularly to a column-forming formwork device suitable for use in a column of a skeleton having a plurality of floors. It is about.

[Conventional technology]

If the pillars that make up the skeleton are RC (reinforced concrete) or SRC (steel reinforced concrete), build the pillars by placing the concrete after the reinforcement of the pillars and burying the reinforcements. .

Conventionally, this concrete casting work is performed by assembling a formwork so as to surround the column reinforcing bar to be buried, casting concrete at a predetermined height in the assembled formwork, and setting the formwork after setting concrete is hardened. This is done by removing the mold.

In this case, for the formwork, for example, in the case of a rectangular pillar, a box shape is formed by combining a plurality of weir plates of a predetermined length, and the combined weir plate is slid or bolted. It is formed by fixing with, for example. After the concrete poured inside hardens, the formwork is dismantled (demolded), and then the concrete is moved upward to be poured. The assembling, disassembly, and rearrangement of such a formwork are performed manually on the erection scaffold.

[Problems to be solved by the invention]

By the way, in recent years, in order to realize a serious labor shortage and a drastic shortening of the construction period in the construction industry, there has been a movement to automate the construction of a building frame, and several technologies have already been proposed. .

In order to automate such a skeleton construction, it is a bottleneck how to form a concrete formwork work, especially for a skeleton constructed using concrete such as RC structure or SRC structure. Becomes

The present invention has been made in view of such circumstances, and is intended to perform a series of operations such as installation, removal, and movement of a formwork at the time of constructing a concrete column, with no or little human intervention. It is an object of the present invention to provide a formwork apparatus for constructing a pillar.

[Means for solving the problem]

A formwork apparatus for constructing a pillar according to the present invention includes a formwork body formed into a cylindrical shape by forming a cross-sectional shape of a pillar to be constructed, and a plurality of forms supporting the formwork body slidably in an axial direction. And a pillar assembled in a frame shape by a guide rod, and the pillar and the form body each have fixing means for fixing the pillar and the form body to an existing portion of the pillar,
Between the support and the form body, a drive mechanism for raising a reaction force on one of the supports and the form body, which is fixed to the existing portion of the pillar to be constructed, is interposed, An opening that can be opened and closed is formed in a beam passage portion of the form body that interferes with a beam of the frame when the form body moves. .

Further, as the drive mechanism, one constituted by a telescopic jack provided in parallel with the guide rod and having one end connected to the lower end of the support and the other end connected to the lower end of the form body, Alternatively, it is preferable that the rack be formed on the guide rod along the longitudinal direction, and a pinion gear provided on the mold body side and driven by meshing with the rack.

[Action]

Concrete is poured into the formwork body with the formwork body set at the lowest position of the column. In this state, the support
The cast concrete is fixed to the existing portion of the pillar, and the cast concrete is to be added to the existing portion.

When the driving mechanism is actuated with the fixing means of the form body released after the concrete in place, the form body rises along the columns (guide rods), and the mold is removed together with it.

Concrete is poured into the form body again at the position where the form body is raised. This concrete will be further laid on the previously cast concrete.

After the added concrete is cured, the fixing means of the formwork body is fastened to fix the formwork body to the hardened cast concrete, the fixing means of the column is released, and the drive mechanism is further activated. This time, the support rises with respect to the form main body and returns to the initial state, that is, the state where the form main body is located below the support.

Thereafter, by repeating the above operation, it is possible to raise the entire formwork device while adding concrete to the existing portion.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

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

This pillar-building formwork device (hereinafter, abbreviated as “formwork device”) 1 includes a formwork body 10 formed in a cylindrical shape by forming a cross-sectional shape of a pillar to be built, and a formwork body 10. And four supporting rods 20 which are slidably supported in the axial direction.

As shown in FIG. 1, the guide rods 21 of the column 20 are set at intervals located at the four corners of the column 2 to be constructed. In the present embodiment, the length of the column 20 in the longitudinal direction is formed to be one or more levels of the length of the frame constructed from the columns constructed by the formwork apparatus 1. At the lower end of the column 20, a tightening band 23 which is tightened by a bolt 22 is formed.
The support column 20 is firmly fixed to the existing portion of the column 2 by 23.

The formwork body 10 is slidably provided along four guide rods 21 constituting the support column 20, and constitutes a cylindrical box having a bottom portion and an upper portion opened. The cross-sectional shape of the hollow portion of the mold body 10 which is a cylindrical box is formed to be the cross-sectional shape of the column 2 to be formed. The formwork body 10 is composed of beams forming a frame together with the columns 2 (sei).
The length is set to be about twice as long as the length, and is divided into two vertically above and below the center in the length direction (height direction).

Further, as shown in FIGS. 2 and 3, the form body 10 is supported by a fixed weir plate 11 forming the four corners of the box and the guide rod 21, It comprises opening and closing weir plates 13A and 13B that open and close the opening 12 formed between the weir plates 11 from both sides. FIG. 4 shows the open state of the open / close weir plates 13A and 13B. The concrete support surface 13a of one of the open / close weir plates 13A, that is, a portion which is flush with the inner surface 11a of the fixed weir plate 11 is constituted by a thin plate 14, and the concrete support surface 13b of the other open / close weir plate 13B is It is configured to overlap with the back surface of the plate 14.

Further, a fastening band 16 similar to the fastening band 23 provided at the lower end of the column 20 is formed integrally with the fixed dam plate 11 at the lower end of the form body 10. Reference numeral 15 denotes a bolt for fastening the fastening band 16. The tightening band
16 and the tightening band 23 are respectively located at positions corresponding to the opening 12, and separated portions 16 a and 23 having the same width as the opening 12.
a, and the bolts 21 and 15 are
It is configured to tighten a.

An extendable jack 30 is interposed between the lower end of the movable support 20 and the lower end of the mold body 10, and the form main body 10 and the movable support 20 are relatively moved by the extendable operation of the extendable jack 30. Can be slid. In FIG. 2, reference numeral 17 denotes a lock mechanism for fixing the open / close weir plates 13A, 13B when the open / close weir plates 13A, 13B are closed.

Next, the operation of the above-structured column-building formwork device 1 will be described with reference to FIGS.

<Formation of pillar base> After building the foundation (not shown), as shown in FIG.
To form the base.

First, the pillar 2 is assembled into a unit, and a column reinforcing bar 3 having a height of about one level is erected, and then concrete 4 is poured into the base at a height of about 1 m. The placing of the concrete 4 is performed by a normal formwork operation.

Here, the reason why the concrete 4 is cast in advance only on the base portion is that the formwork device 1
This is for supporting the (post 20).

<Installation of Formwork Device> As shown in FIG. 6 or FIG. 1, the lower end of the column 20 is fixed to the base of each column 2, 2,. I do. In this state, the telescopic jack 30 is in the most retracted state,
Position 10 at the bottom of column 20.

If the pillars 20, 20, ... are fixed to the bases of the pillars 2, 2, ...,
The upper ends of the plurality of columns 20 are connected to each other. However, in this embodiment, the trolleys 40, 40,
… Can be driven, so in this case,
Each column 20 is connected by a track for the trolley 40, that is, a trolley rail 41. Although not shown, each trolley 40 is equipped with, for example, a hoisting device.

The formwork apparatus 1 according to the present invention can be operated alone by means such as forming the fixing portion of the column 20, that is, the tightening band 23 to be wide. However, several units are connected to each other as described above. Thus, the centering of the column 20 with respect to the column 2 is reliably performed. And in the embodiment,
Each of the columns 20 is connected by a trolley rail 41, and the trolley 40 travels along the trolley rail 41. Note that FIG. 6 and the like show a state in which only two adjacent columns 20 are connected, but in reality, many columns 20, 20,... Are connected both vertically and horizontally.

<Concrete Casting> When the columns 20 are set on the pillar bases formed as described above, the concrete 4 is cast into the formwork body 10 and added to the bases (FIG. 6). ).

<Rise of formwork body and concrete placement> When the concrete 4 placed above hardens, the seventh
As shown in the figure, the mold body 10 is moved upward. The form body 10 can be moved upward along the guide rod 21 by extending the extension jack 30, and the form body 10 is released from the mold. At this time, the rising height of the form body 10 is such that the lower part of the movable form 20 slightly overlaps with the upper end of the concrete 4 previously cast.

When the form body 10 is raised to a predetermined position as described above,
The concrete 4 is poured into the formwork body 10 so as to be added to the portion extended and constructed by the above-described process.

However, at this time, since the upper half of the form body 10 corresponds to the position where the beam 5 for constructing the frame 9 is erected, the concrete 4 is limited to the lower half of the form body 10.

<Upright> When the concrete 4 cast above hardens, the upright 20 is raised as shown in FIG.

To raise the support 20, the tightening band 16 provided at the lower end of the formwork body 10 is tightened, then the tightening band 23 provided at the lower end of the support 20 is loosened, and then the telescopic jack 30 is retracted. I just need. Since the fixed dam plate 11 is strongly pressed against the hardened concrete 4 and fixed by the tightening of the tightening band 16 of the formwork body 10, if the retractable jack 30 is retracted in this state, the support column 20 is fixed. It slides with respect to the completed mold body 10 and moves upward. Here, in the present embodiment, as described above, since a large number of columns 20 are connected by the trolley rail 41, the columns 20 connected to each other are simultaneously raised. Therefore, each of the telescopic jacks 30, 30,... Is configured so that all the telescopic operations are synchronized.

<Construction of the connection part> In the illustrated example, the beam 5 is erected as shown in FIG. The erection work of the beam 5 is performed by the trolley 40 provided above the column 20.
Can be efficiently performed.

At this time, the portion of the column 2 to which the beam 5 is to be connected is surrounded by the upper half of the form body 10 moved upward. Therefore, in the upper half of the formwork body 10, the opening 12 is formed by opening the open / close weir plates 13A and 13B, and the beam 5 to be connected can be exchanged (FIG. 4). reference).

Then, if the beams 5, 5,...
As shown in the drawing, a column reinforcing bar 3 for forming a portion corresponding to the two layers of the column 2 is attached to the connection portion. The column reinforcing bar 3
Is also mounted by winding up the trolley 40.

When the above condition is reached, concrete 4 is poured into the formwork body 10, and when the concrete 4 is hardened,
11 Raise the form body 10 as shown in FIG. At this time, the form body 10 crosses the beams passing through the form body 10 by opening the lower half open / close weir plates 13A and 13B. On the other hand, with respect to the upper half, the opening 12 is closed by closing the open / close weir plates 13A and 13B, and concrete 4 is poured into the upper half of the formwork body 10.

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

<Repetition of the above steps> Thereafter, according to the above procedure, by repeating the operation of ascending the form body 10 → concrete placing → setting concrete hardening, ascending the form body 10 (demolding) → ascending column 20, The pillar 2 may be extended and constructed upward.

FIG. 12 shows that the floor 7 (PC board or deck plate, etc.) 6,6,... For forming the first floor by the trolley 40 is laid on the floor 7 while the formwork apparatus 1 is being lifted. This shows the pattern being constructed. Also the thirteenth
The figure shows a trolley crane 43 running on a track 42 erected between the upper ends of the columns 20, similarly to the trolley 40 described above.
FIG. 14 shows that the column 2 is further extended upward and then the formwork apparatus 1 is mounted.
Are shown as increasing.

As described above, according to the formwork apparatus 1, the apparatus 1 itself is raised by the drive mechanism using the existing portion of the column 2 as a foothold, and the formwork body 10 is set at a location where concrete is to be cast. Therefore, there is no need to manually assemble and disassemble the formwork. In addition, the scaffolding work for that can be eliminated. For this reason, the pillar 2 can be constructed very efficiently, and the construction period can be shortened and the number of personnel can be significantly reduced.

Further, each of the above operations relating to the formwork apparatus 1, that is, the fastening and release of the tightening bands 16 and 23, and the operation of the telescopic jack 30 can be appropriately automated, and furthermore, it is also possible to control the program. Therefore, when the formwork device 1 is configured in such a manner, it is possible to realize complete automation of the formwork device.

Furthermore, in the formwork device 1 according to the present embodiment, since the opening 12 is closed from both sides by the open / close 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 guide rod
In this case, the distance between the guide rods 21 is increased, so that the width of the opening 12 is also increased (in this case, the distance between the guide rods 21 is also adjustable with respect to the support column 20). If so, even if the column diameter becomes large, both the open / close weir plates 13A and 13B can close the opening 12 at any time.

In the embodiment, the drive mechanism is the telescopic jack 30 having one end connected to the lower end of the column 20 and the other end connected to the lower end of the mold body 10. The mechanism is not limited to this, and may have another configuration.

As an example, although not shown, the following configuration is exemplified. That is, at least one of the guide rods 21 constitutes a rack along the longitudinal direction thereof,
The frame body 10 has a configuration in which a pinion gear that is driven by meshing with the rack is mounted. In this configuration, by driving the pinion gear, the formwork body 10 is
Since it is possible to slide along the extension 21, the same function as that constituted by the above-mentioned telescopic jack 30 can be exhibited. In this configuration, when the support 20 is raised with respect to the fixed form body 10 as described in the above step, when the form body 10 is raised with respect to the support 20 as in the above step, the pinion gear May be reversed.

Further, in the embodiment, the example in which the present formwork apparatus 1 is applied to the column 2 having a rectangular cross section has been described. However, by appropriately setting the shape of the form body 10, the column 2 having another cross-sectional shape can be obtained. Of course, it is also applicable. For example, if the whole of the form body 10 is formed in a cylindrical shape by forming the fixed weir plate 11 and the open / close weir plates 13A and 13B in an arc shape, the present invention can be applied to a column having a circular cross section.

〔The invention's effect〕

As described above, according to the pillar-forming formwork device according to the present invention, the column-building formwork device itself rises with the drive mechanism using the existing portion of the pillar as a foothold, and is moved to a place where new concrete is to be poured. Since the mold body is set, it is not necessary to manually assemble and disassemble the mold, and it is also possible to eliminate the scaffolding work. For this reason, the construction of the concrete pillar can be performed extremely efficiently, and the construction period can be shortened and the number of personnel can be significantly reduced. Further, the respective operations of the present formwork device, such as the fastening / unlocking operation of the fixing means and the operation of the drive mechanism, can be appropriately automated, and can be driven by program control. When the apparatus is configured in such a manner, it is also possible to realize the complete automation of the formwork for placing the concrete in the column.

[Brief description of the drawings]

1 to 3 show an example of the configuration of a formwork apparatus for pillar construction according to the present invention. FIG. 1 is an overall perspective view, FIG. 2 is an overall side view, and FIG. 3 is a horizontal sectional view. FIG. 4 is a plan view of the formwork apparatus showing the open state of the open / close weir plate, and FIGS. 5 to 14 illustrate the operation of the formwork apparatus according to the embodiment. FIG. 3 is an elevation view shown with a pillar. DESCRIPTION OF SYMBOLS 1 ... Form construction apparatus for pillar construction, 2 ... Column, 4 ... Concrete, 5 ... Beam, 9 ... Body, 10 ... Form body, 11 ... Fixed formwork, 12 ... Opening, 13A, 13B: Opening / closing weir plate, 16: Tightening band (fixing means), 20: Support, 21: Guide rod, 23: Tightening band (fixing means), 30: Telescopic jack (drive mechanism) ).

Continued on the front page (72) Inventor Haruo Nakazawa 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) E04G 13/02

Claims (3)

(57) [Claims] 1. A formwork device which is used when constructing a pillar which is made of cast concrete and which constitutes a skeleton, wherein the sectional form of the pillar to be constructed is formed into a cylindrical form. A main body, and a support frame assembled by a plurality of guide rods that support the form body slidably in the axial direction. The support and the form body include the support and the form body. It has fixing means for fixing to the existing portion of the column, and between the support and the formwork body, one of the support and the formwork body, which is fixed to the existing portion of the column to be constructed, is opposite to the other. A drive mechanism for taking the force to raise the other is interposed, and an opening that can be opened and closed at a beam passing portion of the form body that interferes with a beam of the skeleton by moving the form body. For pillar construction characterized by the formation of Formwork equipment. 2. The telescopic jack according to claim 1, wherein the driving mechanism is provided in parallel with the guide rod, one end of which is connected to a lower end of the column, and the other end of which is connected to a lower end of the frame body. The formwork device for pillar construction according to claim 1, characterized in that: 3. A drive mechanism comprising: a rack formed on a guide rod along a longitudinal direction of the guide rod; and a pinion gear provided on a mold body side and driven by meshing with the rack. The formwork apparatus for pillar construction according to claim 1, characterized in that: