JPH0241627B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a movable outer formwork device used in the construction of arch culverts.

In recent years, in the construction of horizontally long concrete structures such as culverts and retaining walls, in order to improve construction efficiency and save labor, mobile type forms have been used, in which large-scale formwork is moved and used repeatedly. Frame construction methods have come into use, and the method of moving the formwork in which the formwork is supported by a trolley and moved is becoming mainstream.

However, if this traveling type is applied to the outer formwork of an arch culvert, the formwork will have a large-scale structure, so it will be particularly large and heavy; In order to support and move the formwork stably and to smoothly and reliably perform various adjustments and operations such as shaping and demolishing the formwork, the cart used to move the formwork must be strong and large. At the same time, there are many other problems, such as a complicated operating mechanism for the formwork, making it troublesome to handle, and requiring a large space to install the traveling cart.

The present invention was made in order to solve the problems in the above-mentioned traveling type movable outer formwork device for arch culverts. A pair of upper and lower parallel support arms are pivotally connected to each other, and the distal ends thereof are pivotally connected to a traveling caster vehicle having support legs equipped with wheels that can be freely adjusted up and down, and the support arms are placed in an inclined state where the distal ends thereof are lowered. By installing a telescopic adjustment member for adjusting the inclination angle of the support arm between the pillars and the formwork body, the structure is simple and lightweight, and it is easy to shape, adjust, and demold the formwork. It is an object of the present invention to provide a movable outer formwork device for arch culverts that is reliable and easy to operate and has good work efficiency.

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

In the figure, reference numeral 1 denotes a formwork body, which consists of arch-shaped batten materials 2 arranged in parallel at required intervals, connected by horizontal battens (not shown), and a weir plate 3 attached to the inside of the batten materials 2. ing. Further, as shown in the figure, the formwork body 1 is divided into two parts at the top of the formwork body 1a and 1b as needed, and the formwork bodies 1a and 1b are rotated in the direction of the arrow by a pin 4 at the top end of the formwork body 1. It is also possible to have a structure in which they are freely connected.

Reference numeral 5 denotes a traveling leg vehicle disposed at the lower part of both outside sides of the form body 1, in which a supporting leg 7 equipped with wheels 6 can be freely adjusted up and down by a lifting mechanism 9 such as a hydraulic type or a screw type on a pedestal 8. It has a set configuration. The traveling caster 5 has a pair of parallel supporting arms 10 and 11 pivotally connected to the lower part of the form body 1 at a required distance from each other by pins 12 and 13. It is connected to the pillar 8 by means of 14 and 15 in a pivotal manner. Therefore, the frame body 1, the support arms 10, 11, and the pillars 8 form a link mechanism. The support arms 10 and 11 connecting the traveling caster 5 and the formwork 1 are inclined with their tips lowered, and are provided with adjustment means for changing the angle of inclination as appropriate. As shown in the figure, the inclination angle adjustment means is such that a hydraulic or screw type telescopic adjustment member 16 is installed between the lower ends of the traveling caster 5 and the formwork 1 to maintain a substantially horizontal position via pins 17 and 18. The structure was constructed in such a condition.
Therefore, by expanding and contracting the expansion/contraction adjustment member 16, the form body 1 and the traveling caster 5 can be adjusted to the support arm 1.
0 and 11 are used as intermediaries, they are moved relative to each other in the vertical direction and their mutual spacing is also adjusted.

The traveling casters 5 are mounted at the front and rear of the formwork 1 and other appropriate positions.

Next, construction procedures using the apparatus of the present invention will be explained. Prior to construction by the apparatus of the present invention, the cloth foundation 19 of the culvert is constructed to a predetermined height, and the rails 20 are laid along the outside thereof. Then, the device of the present invention is placed on the rails 20 via the wheels 6, moved, and fixed at a predetermined construction position. In this case, the lifting mechanism 9 of the traveling caster 5 is operated to raise the pedestal 8 so that the lower end of the form body 1 does not come into contact with the ground 21.

To position the form body 1 in the transverse direction,
The distance between the form body 1 and the traveling caster 5 may be moved toward or away from each other by operating the telescopic adjustment member 16. Further, positioning of the form body 1 in the height direction can be performed by operating the elevating mechanism 9 of the traveling caster vehicle 5 and adjusting the height position of the pedestal 8 up and down. After positioning, the pedestal 22 is inserted under the formwork 1 to stabilize the formwork 1.

In contrast to the setting of the outer formwork body, the inner formwork 23
(Indicated by chain lines in FIG. 1) is also set, but this inner mold 26 is not particularly limited, and conventionally known devices may be employed as appropriate. Concrete 24 is then placed between the inner and outer molds.

After the concrete 24 has hardened, the form body 1 is removed from the mold. To do this, by shortening the telescopic adjustment member 16, the form body 1 can be moved to the traveling leg vehicle 5 by the link action of the support arms 10 and 11. It will be pulled towards and moved upwards,
The entire form body 1 will be peeled off from the concrete 24. In this way, the demolding operation of the frame body 1 can be carried out extremely easily by only a single operation of the expansion/contraction adjustment member 16.

The form body 1 after demolding is further expanded into concrete 24 by operating the expansion/contraction adjustment member 16 and the elevation adjustment mechanism 9.
The robot is sufficiently separated from the robot and moved to the next construction position, and the above-mentioned operations are repeated to proceed with the construction.

As explained above, the present invention pivots a pair of upper and lower parallel support arms outward to the lower portions of both outer sides of a form body formed in an arch shape. A support leg equipped with wheels is pivotally connected to a traveling leg vehicle that is movable up and down, and the support arm is placed in an inclined state such that its tip side is lowered,
A telescopic adjustment member that adjusts the inclination angle of the support arm is installed between the pillars and the formwork body, so the formwork that makes up the large room can be stably supported and moved, and the height of the formwork can be adjusted. Adjustment and movement in the transverse direction can be performed by raising and lowering the support legs and expanding and contracting the telescopic adjustment member, making it easy to adjust when shaping the formwork.
In addition, peeling and demolding of the formwork from the concrete can be performed by a single operation of the expansion/contraction adjustment section.
It has many excellent effects as an outer formwork for an arch culvert, such as significantly simplifying work, being efficient and labor-saving, and having an extremely simple structure, being lightweight, and being able to be manufactured at low cost.

[Brief explanation of drawings]

FIG. 1 is a front view showing a molded state of an apparatus according to an embodiment of the present invention, and FIG. 2 is a front view showing the same molded state. 1...Formwork body, 2...Butter material, 3...Weir board,
5... Traveling gear, 6... Wheels, 7... Support legs, 8...
... Pillar, 9 ... Elevation adjustment mechanism, 10, 11 ... Support arm, 16 ... Expansion adjustment member, 20 ... Rail, 23 ... Inner formwork, 24 ... Concrete.

Claims (1)

[Claims] 1. The base ends of a pair of vertically spaced support arms extending outward are pivotally attached to the lower parts of both outer sides of the arch-shaped form body, and the support arms are parallel to each other. A support arm equipped with a wheel is pivotally connected to the pedestal of a traveling platform vehicle, which is provided with a support leg that can be adjusted up and down on the pedestal, and the support arm is placed in an inclined state where the distal end side is lowered. A movable outside formwork device for an arch culvert, characterized in that a telescopic adjustment member for adjusting the inclination angle of a support arm is installed between formwork bodies.