KR20060112505A - Formwork for girder - Google Patents

Abstract

The present invention is a formwork installed on the girder fabrication platform including both side supporters installed on both upper surfaces of the lower production table, a pair of connection blocks spaced apart from the upper surface of both sides of the lower formwork plate installed on the lower production table; A side mold plate installed on an upper surface of the connection block; And connecting the connecting plate so that the side die plate is rotated outward by connecting the connecting plate and the connecting plate between the lower side of the side die plate and the lower side of the side die plate, respectively, to the rotation support point (A). It is configured to include a side die rotating device including a rotating hinge to make excellent workability, relates to a girder formwork for easy quality control in the production of composite beams.

Description

Formwork device for girder {Form Apparatus for Girder Construction}

1 shows a formwork for a conventional girder.

Figure 2a shows the formwork device for girder of the present invention,

Figure 2b is an enlarged view of the rotary drive device of the present invention,

Figure 2c shows an excerpt of the connecting block, the side support plate and the fixing block of the present invention.

<Description of Major Reference Signs>

100: curing system 110 of the present invention: bottom die plate

120: connecting block 130: side formwork

140: side die rotating device 141a, 141b: connecting plate

142: rotating hinge 200: girder production stand

210: lower production stand 220: side support

300: fixed block 400: rotary drive device

A: Rotating support part B: Connection part of the side die-rotating device

The present invention relates to a formwork for girders. More specifically, in the manufacture and dismantle of the formwork to accommodate the concrete in the manufacture of bridge girders, it relates to a bridge formwork with excellent workability and easy to operate.

FIG. 1 is a cross-sectional view of a girder formwork device 10 in which a lower flange concrete is formed to surround a rigid lower flange, such as a conventional preplex composite beam or a leafless preplex composite beam.

The formwork device 10 is installed on the upper surface of the lower production table 30 installed in the transverse direction across the vertical support 20 installed on the ground.

The lower production stand 30 is usually made of steel (I-shaped steel) is installed a plurality of spaced apart in the longitudinal direction of the composite beam, the side support 40 in the form of a vertical plate on both sides of the lower production stand 30 It is also fixedly spaced apart in the longitudinal direction.

The formwork device 10 installed on the lower fabrication table 30 is for fabricating the lower flange concrete 52 formed around the lower flange 51 of the preflex composite beam or the leafless preflex composite beam, and is usually made of steel. The lower formwork plate 11 and the side formwork plate 12 are used and manufactured.

The lower formwork plate 11 is fixedly installed on the upper surface of the lower production table 30, is manufactured in the form of a plate using a plurality of steel and / or angle, and is installed to extend in the longitudinal direction of the composite beam.

The side formwork plate 12 is spaced apart in the transverse direction on the lower formwork plate 11, a pair is installed, the outer bottom surface is connected to the vertical support 20 by the lower connection bolt 60, the lower By adjusting the length of the connection bolt 60, the lower portion of the side formwork plate 12 is movable in the transverse direction.

In addition, between the upper side of the side formwork plate 12 and the upper side of the side support 40 is connected to the upper connecting bolt (80a, 80b) by the turnbuckle 70, the side formwork is also inclined outward by the adjustment of the turnbuckle Let it happen as you build.

Looking at the manufacturing method of the composite beam using the conventional formwork device 10,

First, adjust the lower connecting bolt 60 installed on the vertical support 20 and the upper connecting bolts 80a and 80b connected to the turnbuckle 70 so that the side formwork plate 12 is spaced wider than the width of the lower flange concrete of the composite beam. The lower formwork plate (11) to be located on the upper surface.

Next, the I-beams for the composite beams are positioned on the lower formwork plate 11, and the reinforcing bars and / or PC steels are arranged around the lower flange 51 of the I-shaped steels. And by adjusting the upper connecting bolt (80a, 80b) to adjust the position so that the side formwork plate 12 corresponds to the lower flange concrete width of the composite beam.

Next, concrete is poured into the side formwork plate 12 and the lower formwork plate 11 to form the lower flange concrete 52 of the composite beam.

When the lower flange concrete 52 is cured, the side formwork plate 12 is demolded from the lower flange concrete 52 to dismantle the composite beam from the formwork device 10.

At this time, various problems occur in the process of demolding the side formwork plate 12, which will be described below.

In order to separate the side formwork plate 12, in the conventional formwork device 10, the side formwork plate 12 is lowered while continuously repeating the adjustment operation of the lower connection bolt 60 and the upper connection bolt (80a, 80b). From the flange concrete 52 to be demolded in the transverse direction.

However, this work is not only poor construction, but also difficult to control the quality of the composite beam, there was a problem that it requires a large number of workers, which is uneconomical.

That is, the side formwork plate 12 is usually made of a length of about 3M (one span) is connected to each other continuously in the longitudinal direction, accordingly, the lower connection bolt 60 and the upper connection bolt (80a, 80b) is also one span It was common to install three sets at one.

Therefore, in order to demould the side formwork plate 12, the side formwork cannot be removed by moving in the transverse direction at one time, and a worker having a lifetime for each span operates the lower connection bolt 60 and the upper connection bolt 80a and 80b. When demolding the side formwork plate 12, the construction and the like was bound to fall.

In addition, when the operator forcibly manipulates the lower connection bolt 60 and the upper connection bolts 80a and 80b in such a separation process, damage is accumulated such that the side formwork plate 12 is distorted, resulting in lower flange concrete 52. Influencing the longitudinal linearity of the inevitably affected the composite beam quality control.

It has been pointed out that the economical efficiency is reduced due to the replacement of the damaged side formwork plate 12 and the lower connection bolt 60 and the upper connection bolt (80a, 80b).

It is an object of the present invention for the bridge construction that can be economically synthesized beam production is possible in the formwork demoulding work, but also easy to control the quality of the composite beam to be produced, the side mold plate can be demoulded with fewer personnel To provide the formwork.

The present invention to achieve the above technical problem,

First, in order to demold the side formwork plate constituting the formwork device for girder, the side formwork plate is rotated outward by a hinge rotation method so that the formwork is very easily removed.

Second, it was possible to demould the side formwork plate with fewer personnel by adding a rotary driving device that is easy to operate for the rotation of the side formwork plate.

Third, the connection block is installed on the lower surface of the side formwork plate to facilitate the lateral movement of the side formwork plate, and the fixing block can be fixed to the lower formwork plate by changing the position freely. It was installed at the end.

Best Mode for Carrying Out the Invention The best embodiment of the present invention will be described with reference to the accompanying drawings.

Figure 2a is a cross-sectional view of the formwork apparatus for girder of the present invention,

Figure 2b is an enlarged view of the rotary drive device of the present invention,

Figure 2c shows an excerpt of the connecting block, the side support plate and the fixing block of the present invention.

The formwork device 100 for girder of the present invention according to Figure 2a to 2c is

As a formwork installed on the girder production stand 200 including both side support (220) installed on both sides of the lower production stand 210,

A pair of connection blocks 120 spaced apart from both upper surfaces of the lower formwork plate 110 installed on the lower production table 210;

A side mold plate 130 installed on an upper surface of the connection block 120; And

Connection points 141a and 141b installed on the outer side surfaces of the connection block 120 and the lower side of the side formwork plate 130 and the connection parts between the lower side of the formwork plate 130 and the connection block 120 are rotated and supported. A) the side formwork rotating device 140 including a rotary hinge 142 for connecting the connecting plate (141a, 141b) so that the side formwork plate is rotated outward.

The lower production stand 210 is installed in the transverse direction across the vertical support 20 installed to be supported on the ground as in the prior art as shown in Figure 2a is made of steel (I-shaped steel) spaced in the longitudinal direction of the composite beam It is installed, the side support 220 in the vertical plate form on both sides of the upper surface of the lower production table 210 is also installed in a plurality of spaced apart in the longitudinal direction.

The girder formwork device 100 of the present invention is installed inside the lower production stand 210 and the side support 220.

The girder formwork device 100 includes a lower formwork plate 110, a connection block 120, a side formwork plate 130, and a side formwork rotating device 140, which will be described in detail below.

The lower formwork plate 110 is also fixedly installed on the upper surface of the lower production table 210 as in the prior art, is manufactured in the form of a plate (PLATE) using a plurality of steel and / or angle, so as to extend in the longitudinal direction of the composite beam Is installed.

The connecting block 120 of the present invention is installed on both upper surfaces of the lower formwork plate 110, which is a member made of steel in the form of a block, commonly referred to as a "plane," and a pair of upper surfaces of the lower formwork plate 110. It is fixed and installed spaced apart. While supporting the lower surface of the side form plate 130 to be described later has a kind of rotary support member to enable the side form plate 130 to rotate outward by the rotation hinge 142 as shown in Figure 2b.

At this time, the horizontal separation distance of the connection block 120 is set to a distance corresponding to the width of the lower flange concrete of the composite beam, which does not need to adjust the position of the connection block 120 separately for demoulding the side form plate in the present invention. Because. That is, in the present invention, because the side formwork plate 130 is supported by the connection block 120 is rotated outward to enable the demoulding.

However, since the lower flange concrete width can be changed in various ways according to the composite beam, it is necessary to adjust the position of the connection block 120 according to this change.

Therefore, in order to facilitate the change of the position of the connection block 120 fixed to the lower formwork plate 110 in the present invention, the connection block 120 using the fixing block 300 installed to surround both ends of the lower formwork plate. It is to be fixed to the lower formwork plate (110).

Referring to Figure 2c, the fixing block 300 is the upper fixing block 310 is connected to the outer surface of the connection block 120 by a tight bolt, the side support block 320 is the upper fixing block ( While being formed integrally with 320, the fixed block 300 is installed to surround the end of the lower formwork plate 110 by the lower fixing block 330 formed integrally with the lower side of the side support block. At this time, the upper fixing block, the side support block and the lower fixing block to be fastened to the lower formwork plate by a fixing bolt (shown as three in Figure 2c).

Thus, when adjustment of the fixed position of the connection block 120 is required, loosen the fixing bolts of the fixing block 300, adjust the position with the connection block, and then tighten the fixing bolts again to connect the connection block to the upper surface of the lower form plate. Make sure it is fixed.

The side form plate 130 is usually manufactured to a predetermined thickness by processing a steel plate, is supported and installed on the upper surface of the connection block 120 described above.

At this time, although the side form plate 130 is not shown in the longitudinal direction is assembled by a connecting material such as a plurality of longitudinal connection bolts are installed to correspond to the length of the composite beam.

Therefore, the connecting block 120 of the present invention is also installed to extend in the longitudinal direction of the composite beam as a member supporting the side formwork plate from the bottom.

The side formwork plate 130 is installed up and down with the connection block 120, is supported by the connection block 120 is configured to be rotatable outward, this configuration is the side formwork rotary device 140 of the present invention to be.

The side die rotating device 140 will be described with reference to Figure 2c,

Connecting plates 141a and 141b installed on the outer side surfaces of the connection block 120 and the lower outer side surface of the formwork plate 130, respectively; Rotating hinge 142 connecting the connecting plate (141a, 141b) to the side form plate is rotated to the outside by the connecting portion between the lower side of the formwork plate 130 and the connection block 120 as the rotation support point (A). It is configured to include; and can be said to correspond to a kind of hinge.

The connecting plates 141a and 141b are a kind of steel plates, and one connecting plate 141a is attached to the outer outer surface of the connecting block 120 by a bolt or welding method, and the other connecting plate 141b is formed on the side surface thereof. It is attached to the outer outer surface of the formwork bottom.

The connecting plates 141a and 141b are connected to each other by the rotary hinge 142, so that the connecting part between the lower side formwork plate 130 and the connecting block 120 is rotated as the supporting point A, and the side formwork plate 130 ) Is supported by the connection block 120 can be rotated while tilted outward.

When comparing the demolding method of the side formwork plate by such a rotation and the conventional method,

First, in the present invention, as shown in Figure 2a in the state in which the connection block 120 is fixed to the lower formwork plate 110 by the fixed block 300, only the side formwork plate 130 can be released to the outside to be released. However, according to the conventional method as shown in FIG. 1A, since the adjustment of the lower connection bolt and the upper connection bolt has to be repeated in order to demold the side formwork plate 12, there is a great difference in the workability.

Second, even if the side formwork plate 130 of the present invention is connected in a plurality of longitudinal direction by rotating each side formwork plate at the same time or while unwinding the longitudinal connecting bolt not shown using the rotary drive device 400 While it is easy to demould, the conventional method has a limitation in temporarily or simultaneously demolishing many side mold plates at the same time because the upper and lower connecting bolts and the turnbuckles must be operated together. There is a significant economic difference in terms of quality control and formwork durability.

It is the rotary drive device 400 of the present invention to apply a rotational force to the side form plate 140.

The rotary drive device 400 is a hydraulic cylinder 410 installed on the side support of the girder production table; A length adjusting bolt 420 inserted into the hydraulic cylinder 410; Fixing bolt 430 connected to the side support; And a rotation control key 440 installed at the connection fastening portion B of the length adjusting bolt 420 and the fixing bolt 430.

Referring to FIG. 2B, the hydraulic cylinder 410 may prevent the phenomenon in which the side die plate is suddenly rotated by hydraulic pressure while enabling the smooth side die plate to be rotated while the length adjusting bolt 420 is interpolated. . The left end of the hydraulic cylinder 410 is to be connected to the pin fitted in the fixing pin hole on the upper side support portion 220 of the girder production as shown in Figure 2a.

The other end of the hydraulic cylinder is installed by inserting the length adjustment bolt 420, the fixing bolt 430 is connected by the rotation adjustment key 440 to face.

The fixing bolt 430 is connected to the outer side surface of the side form plate 130 by a pin that is also fitted to the fixing hole as shown in Figure 2a.

The rotation control key 440 is fastened to the thread formed on the outer circumferential surface of the length adjustment bolt and the fixing bolt to facilitate the rotation operation, and fine adjustment, and rotates the rotation control key in a predetermined direction, the rotation drive device 400 ) The overall length of the can be adjusted.

The side die plate is rotated to the outside through the rotation of the rotation control key to the side form plate can be demoulded.

When the side die plate demolding is completed, the synthetic beam is repeatedly produced by bringing the composite beam to another position, rotating the demolded side die plate to its original position, and placing the lower flange concrete again.

The formwork for girder according to the present invention is capable of demoulding the side formwork plate without a large number of workers, and also prevents twisting or damage of the side formwork plate in terms of quality control. And the workability is very excellent, it is possible to produce a more efficient composite beam.

The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Claims (4)

Formwork is installed on the girder fabrication platform including both side supports installed on the upper sides of the lower fabrication table, A pair of connection blocks spaced apart from upper surfaces of both sides of the lower formwork plate installed on the upper surface of the lower manufacturing table; A side mold plate installed on an upper surface of the connection block; And Connect the connecting plate so that the side die plate is rotated outwardly by connecting the connecting plate and the connection part between the lower side and the side die plate and the lower side of the side die plate as the rotation support point (A), respectively. The formwork device for girder comprising a; side die rotating device including a rotating hinge. The formwork device for girder according to claim 1, wherein the connection block is connected to a fixed block installed while surrounding both end surfaces of the lower formwork plate for adjusting and fixing the installation position thereof. According to claim 1 or 2, Between the side formwork plate and the side support plate of the girder fabrication table, A hydraulic cylinder installed on the side support plate of the girder manufacturing table; A length adjusting bolt inserted into the hydraulic cylinder; Fixing bolt connected to the side formwork plate; And Forming apparatus for girder, characterized in that the rotary drive device further comprises a; rotation adjustment key installed in the connection (B) of the length adjustment bolt and the fixed bolt. According to claim 2, wherein the fixing block, the upper fixing block is connected to the outer surface of the connecting block by a tight bolt, the side support block is formed integrally with the upper fixing block, formed integrally with the lower side of the support block It is configured to include a lower fixing block, the upper fixing block, the side support block and the lower fixing block is a formwork device for girder, characterized in that fastening to the lower formwork plate by a fixing bolt.

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