JPH0423941Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is installed in a rotary and movable formwork device used when constructing concrete structures such as dams, and is used to control the inclination of concrete pouring formwork. Relating to a device to be modified.

``Prior Art'' Conventionally, as an example of a formwork used for dam construction, there is a sliding type that includes a formwork in which a weir plate is supported by a framework frame and anchor fittings for fixing this formwork. The frame is known. To construct a concrete structure using this sliding formwork, the upper side of the weir plate is raised above the existing concrete part, and the lower side of the frame is raised using anchor metal fittings buried in the existing concrete part. After fixing the formwork by making it contact the concrete part, pouring concrete inside the weir plate that protrudes above the existing concrete part, and burying the anchor fittings in the poured concrete part,
The anchor metal fittings that supported the lower part of the formwork are removed, the formwork is removed from the concrete, and the formwork is lifted by a lifting machine such as a crane and slid upward, and the anchor metal fittings are buried in the newly poured concrete part. The concrete structure is constructed by repeating the following steps: fixing the lower part of the formwork again, replacing the formwork, and pouring concrete again on the upper side.

This type of sliding formwork requires the use of a lifting machine, which requires separate work personnel such as a lifting machine operator and a conductor, which increases construction costs. The inventors previously proposed a rotationally movable formwork device that solved these problems in Japanese Patent Application No. 60-241050.

This rotationally movable formwork device is constructed by attaching a pair of upper and lower formworks to a center frame individually via support arms so that they can rotate up and down, and the support arm of one of the formworks located on the upper side The apparatus was constructed such that the other formwork could be moved upwardly relative to the one formwork by upward rotation of the center frame serving as a support. In other words, this rotary and movable formwork device fixes one formwork located at the bottom to the existing concrete part, and uses the other formwork located at the top to place concrete on the lift one step higher. After the concrete pouring work of this lift is completed, the other formwork is fixed to this concrete pouring part,
Furthermore, this device constructs a concrete structure by repeatedly carrying out operations such as moving the formwork below it to the next lift above it and performing concrete pouring work for the next lift.

``Problems to be solved by the invention'' By the way, when constructing a concrete structure using the conventional sliding formwork device, there are cases where the formwork is tilted, and in order to correct this slope. Various means described below have been adopted to deal with this problem, but no matter which method is used, the following problems occur.

In the case of sliding formwork, stud bolts are fixed to the existing concrete part and inserted into through holes formed in the weir plate of the sliding formwork to support the weir plate, so it is difficult to use a crane. While suspending the slide formwork, the slope was forcibly corrected by using the gap between the through hole and the stud bolt, but there was a problem in that a crane was required each time the correction was made.

In addition, workers are forced to correct the sloped sliding formwork while on scaffolding, but this work is highly dangerous as it involves working at heights.

Note that the above-mentioned slope correction work is a problem that also occurs in places where concrete structures are constructed using the above-mentioned rotary and movable formwork device, but when correcting the slope of the rotary and movable formwork device, the following steps are required: This gives rise to the problems described below.

The rotary and movable formwork device is a device with highly accurate rotating parts, and as mentioned above, there is a risk that the device will malfunction if forced correction work is performed by a worker. Additionally, rotary and movable formwork equipment is unique in that it does not require crane work, so it would be inefficient to use a crane every time the slope is corrected. Benefits decrease.

The present invention was developed in view of the above circumstances, and aims to provide a device that allows workers to easily and safely manually correct the inclination of formwork that occurs during concrete pouring work. .

``Means for Solving the Problems'' The present invention forms at least a pair of left and right through holes in the formwork, into which anchor bolts driven into the concrete are loosely inserted, and the outside of the opening of the through holes. A guide member having a support guide formed on the side thereof through which the anchor bolt is inserted is movable up and down,
In addition, it is supported by the formwork so that it can be locked at desired vertical positions.

"Operation" When the formwork is tilted, the inclination of the formwork is resolved by moving the guide members on both sides of the formwork up and down and applying torque in the opposite direction to the direction of inclination of the formwork.

Embodiment FIGS. 1 to 3 show an embodiment of the present invention, and FIG. 4 shows a rotationally movable formwork apparatus A equipped with an embodiment of the present invention.

Before explaining the correction device of the present invention, a formwork apparatus A equipped with the correction device of the present invention will be explained based on FIG. 4.

As shown in FIG. 4, the formwork device A includes formworks 4 and 4 that are integrated by reinforcing the back side of a horizontally long form plate (weir plate) 1 with vertical end pieces 2 and horizontal end pieces 3.
and a center frame 6 to which these formworks 4, 4 are attached via support arms 5, 5.

Support members 7 extending vertically are fixed to the horizontal edge 2 at the center and both sides of the formwork 4 in the width direction, and each support member 7 on both sides is provided with a V made of steel.
A letter-shaped support arm 5 is provided at right angles to the form plate 1 with its both ends fixed to the upper and lower parts of the support member 7.

The center frame 6 is a horizontally elongated rectangular body constructed by assembling steel materials, and its width is slightly shorter than that of the form plate 1.
V-shaped brackets 10 are attached to the upper and lower portions of both ends in the width direction. The bracket 10 is made of a groove-shaped steel material, and is fixed to the center frame 6 with the opening of the groove facing upward or downward, as shown in FIG. 4.

The formwork 4, 4 has each support arm 5,
5 is connected with a pin to the bent portions of the brackets 10, 10 of the center frame 6, and is joined to the center frame 6 so as to be vertically rotatable.
is designed to be able to rotate 180° around the center frame 6 around this pin connection part, and
At the two rotated positions, the support arm 5 is fitted into the groove of the bracket 10, and the connecting pin 3, which will be described later, is inserted into the groove.
It can be fixed at 0.

Moreover, on the inside side of the center frame 6,
As shown in FIG. 4, a drive motor 13 is fixed to a bracket 11 fixed to the support member 7 at the center of the formwork 4 via a rotation arm 12, as shown in FIG. The formwork 4 can be automatically rotated around the center frame 6.

The correction device according to an embodiment of the present invention is provided on the upper side of vertical end pieces 2, 2 which are fixed adjacent to each other at both ends in the width direction of the formwork 4.

That is, as shown in FIGS. 2 and 3, a pair of upper and lower mounting brackets 15 are fixed to the upper surface of each of the adjacent vertical end pieces 2, 2, and 2, the mounting brackets 15, 15 of one vertical end 2 have a support pin 16 passing through them, and the mounting brackets 15, 15 of the other vertical end 2 have a support bolt 17 passing through them. are attached to each. A horizontally elongated guide member 18 is provided between the support pin 16 and the support bolt 17.

This guide member 18 includes a rectangular cylindrical guide part 19 in the center, guide parts 20 integrated on both sides thereof,
20, a cylindrical support guide 21 is provided inside the guide part 19, and each guide part 20 has a through hole and a screw hole formed in a direction perpendicular to the central axis of the support guide 21. . The guide member 18 inserts the support pin 16 into a through hole formed in one guide part 20, and inserts the support pin 16 into a through hole formed in the other guide part 20.
The support bolt 17 is screwed into a screw hole formed in the support bolt 17 to be provided between the adjacent vertical end pieces 2, 2,
It is provided so as to be movable up and down between the mounting brackets 15, 15 by rotation of a support bolt 17. Further, a through hole 26 is formed in a portion of the form plate 1 facing the bolt guide 21, into which a stud bolt (Siebold) 25 buried in a concrete structure 26 is loosely inserted. plate 1
By inserting the support guide 21 into the through hole 26 of the rotary formwork apparatus A, the rotary formwork apparatus A can be supported by the stud bolts 25, 25 of the existing concrete part.

Next, the operation of the above-mentioned inclination correction device will be explained along with a concrete pouring method for constructing a dam wall using the formwork device A.

First, as shown in FIG.
is fixed to the side of the That is, with two form plates 1 stacked vertically as shown in FIG. 6, each stud bolt 25 is inserted into the through hole 26 of the form plate 1 and the support guide 21, so that the formwork device A is supported. There is. At this location, the center frame 6 and the support arms 5 of the formworks 4, 4 are connected by connecting pins 30, 30 inserted through the support arms 5 and the bracket 10, as shown in FIG.

Next, remove the stud bolt 25 from the bolt guide 21 of the lower formwork 4, remove the upper connection pin 30, operate the drive motor 13, and
The center frame 6 and the lower formwork 4 are rotated as shown in FIGS. 7 to 8 while being supported by the support arms 5, 5 of The upper form plate 1 is installed above the existing concrete part K.

Next, on the inside of the upper form plate 1,
Place concrete as shown in the diagram. Once this poured concrete has hardened, the sixth
As shown in Figures 9 to 9, the formwork 4 is rotated and concrete is poured repeatedly to construct the dam wall.

When the formwork 4 is supported by the stud bolts 25 in the concrete placing work described above, the form plate 1 of the formwork 4 may be inclined as shown by the solid line in FIG. In this case, the tilt correction device having the above-mentioned configuration is used.

To correct the inclination of the form plate 1 of the formwork 4, first attach the stud bolts 2 to the support guide 21.
5 is inserted, the support bolt 17 is rotated to move the guide member 18 up and down. That is, the guide members 18, 1 on both sides of the inclined formwork 4
At step 8, the mold is formed as shown by the two-dot chain line in FIG. The inclination of the form plate 1 can be corrected by applying a torque in the counter-inclination direction to the frame 4. The work explained above can be carried out simply by the worker rotating the support bolt 17 without using a crane.
The inclination correction work of the formwork 4 can be performed extremely easily and safely. Further, by adjusting the amount of rotation of the support bolt 17 and the amount of vertical movement of the guide member 18, the inclination angle of the form plate 1 can be finely adjusted.
This has the effect of allowing you to accurately adjust the angle to the horizontal.

In the above embodiment, the support bolt 17 is used as a mechanism for vertically moving the guide member 18.
However, a structure may be adopted in which a jacking mechanism or the like for vertically moving the guide member 18 is provided on the vertical end 2.

"Effects of the invention" As explained above, the present invention is supported by stud bolts attached to the concrete part, is installed in a formwork device that can move while rotating a pair of formwork, and has a guide member through which the stud bolts pass. At least one pair of guide members are provided on the left and right sides of the formwork so that they can be moved up and down and locked, so if the formwork is tilted during concrete pouring, the left and right guide members can be moved up and down by a predetermined amount. By moving it, the inclination of the formwork can be corrected. That is, there is an effect that the inclination of the formwork can be easily and safely corrected without using a lifting device such as a crane.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a front view, Figure 2 is an enlarged front view of the main parts, Figure 3 is an enlarged side view of the main parts, and Figure 4 is an enlarged side view of the main parts. The figure is a perspective view showing the state in which it is installed in a rotary and movable formwork device.
Figure 5 is a schematic front view showing an inclined form plate, Figures 6 to 8 are for explaining the state in which a concrete structure is being constructed using a rotary formwork device; A side view showing a state in which the upper and lower form plates are stacked vertically and a rotary formwork device is attached to the concrete pouring part. Figure 7 is a side view showing a state in which the lower formwork and center frame are rotated upward. , Figure 8 is a side view showing the formwork moved above the concrete pouring area, Figure 9
The figure is a side view showing concrete being poured inside the formwork. A... Rotating and movable formwork device, K... Concrete section, 1... Form plate (weir plate), 2...
Vertical end thickness, 3... Horizontal end thickness, 4... Formwork, 5... Support arm, 6... Center frame, 7... Support material, 10... Bracket, 18... Guide member,
21... Support guide, 25... Stud bolt,
26...Through hole.

Claims (1)

[Scope of utility model registration request] A pair of upper and lower formworks are individually attached to a center frame via support arms so as to be rotatable up and down. An inclination correction device installed in a rotationally movable formwork device configured to be able to move the other formwork upwardly relative to the one formwork by rotating the formwork to At least a pair of left and right through-holes are formed in the formwork, into which the anchor bolts are loosely inserted, and on the outside of the openings of the through-holes are guide members formed with support guides into which the anchor bolts are inserted, vertically. 1. An inclination correction device for a rotationally movable formwork apparatus, characterized in that it is supported by a formwork in a movable and lockable manner at a required vertical position.