JPH0466978B2 - - 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 order to improve efficiency and save labor in constructing horizontally long concrete structures such as culverts and retaining walls, in recent years mobile type structures 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 by supporting it on a trolley 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 both support arms or between one of the support arms and the pillar, the structure is simple and lightweight, and
It is an object of the present invention to provide a movable external formwork device for an arch culvert, which can reliably and easily perform operations such as shaping, adjusting, and demolding the formwork, 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 support 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 support arms 10 and 11 pivotally connected to the lower part of the form body 1 at a required distance vertically 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 form body 1 are inclined with their tips lowered, and are provided with adjusting means for changing the angle of inclination as appropriate. As a means for adjusting this inclination angle, as shown in the figure,
A portion of the upper support arm 10 near the pin 14;
A hydraulic or screw type expansion/contraction adjustment member 16 is installed between a portion of the lower support arm 11 near the pin 13 using pins 17 and 18. Therefore, by expanding and contracting the expansion/contraction adjustment member 16, the form body 1 and the traveling caster 5 are moved relative to each other in the vertical direction and their mutual spacing is also adjusted through the contact and separation of the support arms 10 and 11. It turns out.

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 moved to the 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.

FIG. 3 shows another embodiment of the inclination angle adjustment mechanism of the support arm in the device of the present invention, in which a bracket 25 is provided protruding from the middle part of the pillar 8, and the upper support arm 10 is attached to a pivot pin. An extension part 26 is formed to protrude outward from the extension part 14, and both ends of the telescopic adjustment member 16 are pivotally attached 27 and 28 to the bracket 25 and the extension part 26, respectively. In this embodiment, when the expansion/contraction adjustment member 16 is operated, the same effect as in the embodiments shown in FIGS. 1 and 2 is performed.

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 both support arms or between one of the support arms and the pillar, so the formwork that makes up the large space can be stably supported and moved. The height of the formwork body and its movement in the transverse direction can be adjusted by raising and lowering the supporting legs and expanding and contracting the telescopic adjustment member, making it easy to adjust the formwork when shaping the formwork, and to adjust the movement of the formwork body in the concrete. Peeling from the mold and demolding can be performed by a single operation of the expansion/contraction adjustment part, which greatly simplifies the work, making it efficient and labor-saving, and furthermore, the structure is extremely simple, lightweight, and manufactured at low cost. It has many excellent effects as an external formwork for arch culverts.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the molded state of the device according to an embodiment of the present invention, Fig. 2 is a front view showing the same demolded state, and Fig. 3 is the connection between the form body and the traveling caster. FIG. 7 is a front view showing another embodiment of the separation adjustment mechanism. 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, 2
5...Bracket, 26...Extension part.

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 leg equipped with a wheel is pivotally attached to the pedestal of a traveling platform vehicle, which has a support leg provided with a wheel at its tip so as to be adjustable up and down. A movable external formwork device for an arch culvert, characterized in that a telescopic adjustment member for adjusting the inclination angle of the support arm is installed between or between one of the support arms and the pedestal.