JPS6146629B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction movable formwork device for constructing culverts and the like of various shapes.

In recent years, various types of mobile formwork equipment have been developed to construct various types of culverts such as underground passages and tunnels, elevated structures, and building frames. In order to remove the frame, it is necessary to reduce its height and width. Therefore, in general, a movable formwork device allows a slab beam 1' to be moved up and down as shown in FIG. The outer periphery of the slab shearing plate 4' installed on the upper surface of the slab beam 1' and the side wall shedding plate 5' installed on the side wall vertical butterfly 2' After the concrete 6' poured in the concrete 6' has hardened, when the side wall vertical butterfly 2' is tilted inward around the pivot pin 3' in order to remove the formwork, the upper corner of the side wall sheath plate 5' is removed. The inner upper end A of the side wall of the concrete 6' is dented, causing galling scratches that require repair, and also makes it difficult to tilt the side wall vertical butterfly 2' smoothly, and in this state, the slab beam 1' is lowered. However, there were drawbacks such as even larger scratches.

Therefore, as shown in FIG. 2, in the conventional movable formwork device, even if the upper end corner of the side wall shear plate 5' is inclined obliquely and the side wall vertical butterfly 2' is tilted inward, the side wall shear plate 5' It was devised so that it would not chew up the concrete 6' side wall that had been poured. Therefore, not only is it not possible to pour concrete so that the corners of the side walls and the ceiling wall are at right angles, but also extra concrete must be poured to cover the slope of the upper corner of the side wall sheath plate 5'. This was extremely uneconomical. In addition, in construction work where the corners of the side walls and ceiling walls are made at right angles, the formwork must be placed by hand in the conventional manner without using a mobile formwork device, making the construction inefficient. It had many drawbacks, such as being troublesome.

The present invention has been proposed in view of the above-mentioned conventional drawbacks, and involves cutting out the collision corner of the side wall shear plate and the slab shear plate, and removably interposing a corner weir plate in the notched corner. It is characterized by the fact that when the formwork is removed, the corners of the concrete can be poured at right angles without causing scratches on the side walls of the concrete.
Another object of the present invention is to provide a construction movable formwork device which is extremely superior in practical terms and can form any stepped pattern or the like in the corners of concrete simply by replacing the corner weir plates.

Hereinafter, the present invention will be specifically explained based on the embodiments shown in FIGS. 3 to 5.

FIG. 3 is a front view showing a state in which a culvert having right-angled corners is constructed using the construction movable formwork apparatus according to the present invention.

In the figure, 1 is a box-shaped main frame, which can be moved by wheels 5 of a traveling device along rails 4 installed on a floor 3 on which a culvert 2 is constructed. The legs of the main frame 1 are provided with a lifting device 6 such as a screw type or hydraulic type, and by operating the lifting device 6, the main frame 1 is moved as shown by the arrow. It can be raised and lowered arbitrarily.

Next, a plurality of slab beams 7 are arranged on the upper surface of the main frame 1 via vertical beams 8, and are provided at a predetermined interval at right angles to the moving direction of the main frame 1. At both ends of all or an appropriate number of these slab beams 7, the upper ends of side wall vertical flaps 9 are pivotally supported by pivot pins 10,
By connecting the appropriate lower part of the side wall vertical butterfly 9 and the main frame 1 by an expansion/contraction device 11 such as a turnbuckle or cylinder, and operating the expansion/contraction device 11, each side wall vertical butterfly 9 can be rotated around the pivot pin 10. It can be tilted arbitrarily as shown by the arrow.

Furthermore, a slab sheath plate 13 is installed on the upper surface of the slab beam 7. This slab sheathing plate 13 is a sheathing plate used for pouring the ceiling slab portion of the concrete 15, and is shorter than the required width necessary for concrete pouring, with both ends thereof removed by the required width. . Furthermore, a side wall sheath plate 12 is installed on the outside of the side wall vertical butterfly 9. This side wall weir plate 12 is a weir plate used for pouring the side wall portion of the concrete 15, and is lower than the required height necessary for concrete pouring, with its upper end portion removed over the required height. . In the corner gap of the approximately L-shaped cross section formed between the outer ends of the slab shearing plates 13 from which both ends are removed and the upper ends of the side wall sheathing plates 12 from which the upper end portions are removed, Abbreviation L
A corner weir plate 14 in the shape of a letter is detachably inserted.

4 and 5 are perspective views showing an example of the corner weir plate 14, in which 14-a is a corner weir plate constructed by cutting an L-shaped member having a right-angled corner into a predetermined length. , and 14-b is the corner weir plate 14-
A corner weir plate with several decorative wave grooves c provided on its outer surface is shown. However, if a decorative stepped pattern is provided, such as the corner weir plate 14-b, the corner weir plate 14-b should be split so as not to damage the stepped pattern when removed. It is preferable to assemble two flat plates by joining them at each end, and also to be able to separate and remove them.

In addition, in FIG. 3, 15 is the side wall sheath plate 1.
2. Concrete is cast on the outside of a box-shaped formwork surrounded by slab sheirs 13 and corner weirs 14.

In order to construct the culvert 2 using the construction movable formwork device of the present invention having the above configuration, the main frame body 1
is moved along the rail 4, the main frame 1 is raised by the lifting device 6 at a predetermined construction position, the slab sheathing plate 13 is set horizontally at a predetermined height, and the side wall vertical flap 9 is moved by the telescopic device 11. After tilting the side wall plates 12 outward to set the side wall sheath plates 12 in a predetermined position, corner weir plates 14 are interposed in the notched corners of the slab shear plates 13 and the side wall plate 12 to form a formwork, Concrete 15 may be placed on the outside.

In order to remove the formwork from the concrete 15 that has been poured, the side wall vertical butterflies 9 are tilted inward by the expansion and contraction device 11, the corner weir plates 14 are pulled out from the notched corners, and then the vertical flaps 9 are tilted inwardly by the lifting device 6. The main frame body 1 only has to be lowered, and in this state it can be moved along the rails 4 to the next construction position, and the culverts 2 can be constructed one after another.

Note that the corner weir plate 14 interposed in the notched corner of the slab weir plate 13 and the side wall weir plate 12 is connected to the slab weir plate 13 and the side wall weir plate 12 by a connecting fitting (not shown) provided on its end face. It may be removably attached to the end face with pins or bolt nuts or the like, or it may be removably attached to the inside of the abutting edges of the slab sheath plate 13 and the side wall sheath plate 12 using clamps or the like. Further, the shape of the corner weir plate 14 is not limited to the shape shown in FIGS. 4 and 5, but can be designed into any shape depending on the decoration to be applied to the corner. Furthermore, if the joint surfaces of the slab weir plate 13 and the corner weir plate 14 are made to be an inclined joint surface as shown in FIGS. 3 to 5,
It is also possible to adopt a method in which the main frame is lowered and moved while the corner weir plates 14 are adhered to the concrete, and the corner weir plates 14 are later removed.

As specifically explained above, the present invention provides a plurality of slab beams arranged at predetermined intervals on the upper surface of a main frame provided with a traveling device and a lifting device, and both ends of all or an appropriate number of the slab beams. In each section, vertical side wall flaps are pivotably supported for tilting, and slab shedding plates are installed on the upper surface of the slab beam except for both ends, and side wall shedding plates are installed on the outside of the side wall vertical flaps except for the upper end portions. A corner weir plate with a roughly L-shaped cross section was removably interposed between the outer edge of the slab shear plate and the upper end of the side wall weir plate. However, it will not cause scratches on concrete walls.

(2) Since concrete can be placed so that the corners of the side walls and ceiling walls are at right angles, this type of formwork construction, which was traditionally done by hand, has been mechanized and streamlined. The amount of concrete placed can also be reduced, making it extremely economical.

(3) If a stepped pattern or the like is provided on the outer surface of the corner weir, various decorative patterns can be applied to the corner simply by replacing the corner weir.

(4) During construction, a corner weir plate is inserted into the corner of the notch, and it is only necessary to pull it out after construction, so the work is relatively simple and does not require skill.

(5) Corner sherds are much smaller and lighter than sidewall weirs and slab weirs, so they are easier to transport and handle on site, and can be produced at a lower cost.

It is possible to provide an extremely excellent construction mobile formwork device that has many advantages such as, and can be widely applied not only to the construction of culverts but also to the construction of elevated structures and building frames. It is.

[Brief explanation of the drawing]

Fig. 1 is a front view of a movable formwork device in use, showing the principle thereof, Fig. 2 is a partial front view of a conventional movable formwork device in use, and Fig. 3 is a construction movable formwork according to the present invention. A front view showing how the device is used, and FIGS. 4 and 5 are perspective views showing an embodiment of the corner weir plate used therein. 1... Main frame body, 2... Culvert, 3... Floor surface, 4... Rail, 5... Wheels, 6... Lifting device,
7, 1'... Slab beam, 8... Longitudinal girder, 9, 2'...
Side wall vertical flap, 10, 3'... Pivot pin, 11...
Expansion device, 12, 5'...Side wall sheath plate, 13,
4'...Slab sheath board, 14, 14-a, 14-
b... Corner weir plate, 15,6'... concrete, c... corrugated groove.

Claims (1)

[Claims] 1. A plurality of slab beams are arranged at predetermined intervals on the upper surface of the main frame body equipped with a traveling device and a lifting device, and the upper ends of the vertical flaps of the side walls are connected at both ends of all or an appropriate number of slab beams. At the same time, the lower part of the side wall vertical flap is connected to the main frame via a telescoping device, and the side wall vertical flap is attached so as to be adjustable in tilt, and a slab shedding plate is constructed on the upper surface of the slab beam except for both ends, A side wall weir plate is installed on the outside of the vertical side wall flap except for the upper end, and a corner weir plate with a roughly L-shaped cross section is removable between the outer end of the slab shear plate and the upper end of the side wall shear plate. A mobile formwork device for construction, characterized in that it is interposed in.