JPS6349011B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mobile formwork apparatus suitable for constructing concrete structures such as culverts having curved sections.

BACKGROUND OF THE INVENTION In recent years, large mobile formwork devices have been used to construct culverts, elevated structures, etc. on roads, railways, waterways, etc., and construction can now be carried out with high efficiency.

By the way, structures such as culverts have not only straight parts but also various curved parts depending on the curves of the construction route, but large mobile formwork equipment generally has a long overall length, so it has curved parts. It is not possible to meet this requirement by constructing sections, so we have to make special short devices and connect many of them together, or create and use special formwork devices that fit only the curved sections. Alternatively, a formwork made by hand, which has been commonly done in the past, is used. In particular, when it comes to roads, etc., the width of the route increases at the center of the curve, as shown in Figure 1 (A), or the width of the route gradually decreases and gradually increases, as shown in Figure 1 (B). When constructing culverts in such places, it was necessary to use conventional, inefficient hand-built formwork. In addition, even in straight sections, there are places where the width of the line gradually decreases and gradually increases as shown in Figure 1 C. Even in this case, conventional movable formwork equipment cannot be used, and the formwork is hand-assembled. This is a situation where

The present invention improves the above-mentioned drawbacks of formwork construction, and combines a formwork device that can freely expand and contract in the curvature and width direction and a traveling trolley so that it can be adapted to various curves. The purpose is to provide a general-purpose moving formwork device that can be applied to straight sections such as culverts, etc. to curved sections, including changes in the width direction, and thereby greatly improves the construction efficiency of culverts, etc. The aim is to improve the quality of construction work and reduce construction labor and costs.

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

Fig. 2 is a front view showing a moving formwork device according to the present invention, and Fig. 3 is a partially cutaway plan view thereof, in which A is a traveling cart, and a required interval is set in the front and rear. It is formed by integrally connecting the main frames 1, 1, which are arranged at 28
Wheels 4 that can run along rails 3 installed in
There are also traveling casters 6, 6 provided with a lifting device 5, and by operating the lifting device 5, the traveling trolley A can be raised or lowered arbitrarily as shown by the arrow.

Further, B is a formwork device placed on the traveling truck A, in which a plurality of slab beams 8 formed long in the width direction of the traveling truck A are arranged in parallel at a required interval, A plurality of connecting pieces 7, 7 are protruded from the side surface of the intermediate part of this slab beam 8 at required intervals, and each slab beam 8, 8 is provided between the connecting pieces 7, 7 facing each other. Connect both ends of the connecting rod 10 to pins 9, 9.
are pivotally connected to each other so as to be movable in parallel. The connected body of the slab beams 8, 8 is placed on the traveling truck A via the connecting rods 10, 10.

Furthermore, each of the slab beams 8, 8 is configured to be expandable and contractible in the longitudinal direction. That is, the slab beam 8 has slide grooves 11, 1 at its longitudinal end.
1 is provided, and elastic members 12, 12 are inserted therein, and the elastic members 12 are regulated in position on the upper and lower surfaces by the butts 13, and the slab beams 8
and the elastic member 12 are connected by an elastic device 14 such as a turnbuckle or cylinder, and by operating the elastic device 14, the elastic member 12 is moved in and out of the slab beam 8 as shown by the arrow, and the slab beam 8 is moved. Substantially, it can be expanded or contracted arbitrarily in its length direction.

Further, side wall vertical flaps 16 are pivotally attached to both ends of each slab beam 8 by pins 15, and side wall shedding plates 18 are attached to the outside of each side wall vertical flap 16, 16 to form a side wall formwork 17. The proper lower part of the side wall formwork 17 is connected to the main frames 1, 1 by a telescoping device 19 such as a turnbuckle or cylinder, and by operating the telescoping device 19, the side wall formwork can be expanded. 17 can be tilted arbitrarily about each pin 15, 15 as shown by the arrow in FIG. Furthermore, slab sheir plates 21 are appropriately placed or attached on each of the slab beams 8, 8, and these slab beams 8 and slab shear plates 2
1, the slab formwork 20 is formed.

A telescoping device 22 such as a turnbuckle or cylinder is installed in the diagonal direction of the rectangular surrounding frame formed by the slab beam 8 and the connecting rods 10.
Both ends of the slab beams 8 and 8 are pivotally connected to diagonal positions of the adjacent slab beams 8, 8 by pins 23, and by expanding and contracting the expansion device 22, the slab beams 8 and the connecting rods 10 are connected to the pins 23. The intersection angle between the slab beam 8 and the connecting rod 10 changes, and each slab beam 8 is relatively translated in its length direction, and the slab beams 8, 8 and consecutive 10,10
The rectangular surrounding frame formed by this is transformed into a diamond shape. As a result, the planar shape of the formwork device B as a whole is curved in its length direction as shown in FIG. 3, and one of the side wall forms 17, 17 is deformed into a convex shape and the other into a concave shape. , it is possible to form a shape that follows the curve of the constructed structure.

Note that when performing such transformation operations,
The slab weir plate 21 is preferably removed, and after the formwork device B is bent and deformed, the slab weir plate 21 may be stretched in accordance with its planar shape. In this case, the slab sheath plate 21 is the slab beam 8
It may be simply placed on the slab beam 8, or it may be fixed to the slab beam 8. Since the side wall formwork 17 is formed thin as a whole and has a structure that is easily deformed elastically in its length direction, the above-mentioned deformation operation can be performed without any problem even if the side wall sheath plate 18 remains attached at all times. can be done.

The configuration for bending the formwork device B is not limited to the above-mentioned means, but can be changed as appropriate. For example, as shown in FIG. 6, the pivoting position of the expansion/contraction device 18, which is used as a deformation means for adjusting the intersection angle between the slab beam 8 and the connecting rod 10, is changed so that the slab beam 8 and the connecting rod 10 are pivoted. It may be placed at the same position as the pin 9, or it may be pivotally connected between the slab beam 8 and the connecting rod 10 at appropriate positions using pins 24, 24.
Further, the deformation means is not limited to the above-mentioned expansion and contraction device 18, but other means can be used, for example, as shown in FIG. Fix the adjustment device 25 screwed into
0 or by engaging it with the slab beam 8, this threaded rod 26
The intersecting angle of both 8 and 10 may be changed by the rotation of .

Further, the expandable structure of the slab beam 8 in the formwork device B is not limited to the means in which the expandable member 12 is provided as described above, but for example, as shown in FIG.
A horizontally elongated hole 27 is provided at both ends of the horizontally elongated hole 27, and a pin 15' provided at the upper end of the side wall vertical butterfly 16 is slidably engaged with the horizontally elongated hole 27 to operate the telescopic device 14'.
The side wall formwork 17 may be moved in the longitudinal direction of the slab beam 8. Even with this configuration,
The substantial length of the slab beam 8 can be expanded and contracted.

Note that 29 is a lower formwork auxiliary material separately arranged on the floor surface 28, and the upper end surface of this material and the lower end surface of the side wall formwork 17 that abuts this material are inclined inward as shown in the figure. The lower end surface of the side wall formwork 17 can be smoothly separated from the upper end surface of the lower formwork auxiliary material 29 when the side wall formwork 17 is tilted inward.

Then, the formwork device B is placed on the traveling trolley A as shown in the figure, but on the upper surface of the traveling trolley A, there is a structure that allows the mounted formwork device B to be adjusted and moved in the lateral direction.
An adjusting tool 30 screwed onto a screw rod 31 is provided,
Bring the end of the threaded rod 31 into contact with the side surface of the connecting rod 10,
By rotating the threaded rod 31 and moving it back and forth in the lateral direction, the formwork device B is moved in the lateral direction, and its placement position with respect to the traveling carriage A is adjusted.

In order to construct, for example, a curved culvert using the moving internal formwork apparatus of the present invention having the above configuration,
Place the formwork device B on the traveling trolley A as shown in the figure,
Move along the rail 3 installed on the floor,
Fix it at the specified construction position. Next, by adjusting the lifting devices 5, 5, the formwork device B is moved through the traveling trolley A.
is set at a predetermined height, and the telescopic device 2
2 and 22 to change the intersecting angle between the slab beam 8 and the connecting rod 10 as shown in FIG.
The outer surfaces of the weir plates 18 and 18 of Nos. 7 and 17 are made to match the curvature of the structure to be constructed. When performing this operation, the slab weir plate 21 may be removed and placed or attached after the operation is completed. Further, the normal alignment of the side wall forms 17, 17 is performed by operating the expansion and contraction devices 19, 19 and adjusting their tilting states. Further, the position of the entire formwork device B in the lateral direction can be adjusted by rotating the threaded rod 31 of the adjusting tool 30.

The above-mentioned bending operation of the formwork device B is to adapt it to a parallel curved culvert as shown in Figure 1A, but the above-mentioned operation is suitable for a culvert with a parallel curve as shown in Figure 1B. In addition to each slab beam 8,
8. Adjust the expansion/contraction as appropriate. In addition, for a linear truss-like structure as shown in C of the same figure, the intersection angle between the beam 8 and the connecting rod 10 is not changed by adjusting the expansion/contraction device 22, but the expansion and contraction of the slab beams 8, 8 is adjusted. Just that is enough.

In the construction of culverts and walls as shown in the figure, an outer formwork is required in addition to the inner formwork device described above. The application may be arbitrary, such as using a movable formwork or a large frame suspended by a crane.

Once the inner formwork apparatus and outer formwork of the present invention are set as described above, concrete 32 is poured. When the concrete 32 hardens, the expansion and contraction devices 19, 19 are retracted to form the side wall forms 17, 19, as shown in FIG.
Pull the lower part of 17 inward and tilt it.
Next, when the lifting devices 5, 5 are operated to lower the traveling carriage A, the formwork apparatus B is lowered accordingly, and the formwork apparatus B is demolded and reduced in size. Then, the apparatus of the present invention is moved in its reduced state to the next construction site, and the above-mentioned operations are repeated to proceed with the construction. Note that if the curvature of the constructed structure at the next construction site is the same as that at the previous construction site, the curvature operation by the expansion and contraction device 22 is excluded, and only the lifting and lowering of the formwork device B and the tilting operation of the side wall formwork 17 are performed. Just by doing this, you can set the formwork.

As explained above, the present invention is composed of a traveling truck having a lifting device and a formwork device placed on the traveling truck. The slab beams are connected by connecting rods so that they can move in parallel, and the intersecting angle between the slab beams and the connecting rods can be adjusted, and side wall forms are provided at both ends of the slab beams so that the tilting can be adjusted freely. The frame device can be easily moved by a traveling trolley, and the formwork can be removed, reduced, and shaped easily and quickly, and the curvature and width of the formwork device can be adjusted freely. Even if the construction structure such as a culvert is curved in plan or has a change in width, the side wall sheathing can be freely adjusted to fit the shape, making it a large moving structure with excellent workability. It has many excellent effects, such as significantly expanding the scope of application of formwork equipment, improving construction efficiency and significantly reducing construction costs.

[Brief explanation of drawings]

Figure 1 A, B, and C are diagrams illustrating various planar shapes of constructed structures such as culverts, Figure 2 is a front view of the device of the present invention, Figure 3 is a plan view, and Figure 4 is the type of the present invention. 5th plan view showing the frame device in a curved state;
The figure is a front view showing the side wall formwork tilted and demolded after construction, Figures 6 and 7 are plan views showing other embodiments of the mechanism for bending the formwork, and Figure 8 is a front view showing the side wall formwork being tilted and demolded. FIG. 7 is a front view showing another example of the slab beam. A... Traveling trolley, B... Formwork device, 1... Main frame body, 2
...Connecting girder, 3...Rail, 4...Wheel, 5...Elevating device, 6...Travelling gear, 8...Slab beam, 10...Connection rod,
12... Elastic material, 14... Elastic device, 15... Pin, 1
6... Side wall vertical flap, 17... Side wall formwork, 18... Side wall sheath plate, 19... Expansion device, 20... Slab formwork, 21
...Slab sheath board, 22...Expansion device, 28...Floor surface,
29... Lower formwork auxiliary material, 30... Adjustment tool, 32... Concrete.

Claims (1)

[Claims] 1. A traveling truck having a lifting device and a plurality of extensible slab beams placed on the traveling truck are parallel to each other and spaced apart from each other by a plurality of connecting rods so as to be movable in parallel, At both ends of the slab beam, there is a formwork device in which the upper end of the side wall formwork is pivotally mounted in a tilt-adjustable manner. A moving internal formwork device such as a culvert, which is characterized by being provided with.