JPH0280762A - Arch culvert moving outside form device - Google Patents

Abstract

PURPOSE:To make a construction simple and lightweight and to make it possible to operate surely and easily the formation, adjustment and stripping etc. of a form by providing up and down pairs of parallel bearing arms and an expansion controlling member to control an inclination angle of the bearing arm. CONSTITUTION:A link structure is constituted of a form 1, bearing arms 10, 11 and a stud 8. The bearing arms 10 and 11 to which a running leg caster 5 and the form 1 are connected are so formed that their tips are declined and, at the same time, a controlling means is provided so that it can change the inclination angle properly. Accordingly, by expanding and contracting an expansion controlling member 16, the form 1 and running leg caster 5 are relatively moved in the vertical direction through the contact and separation of the bearing arms 10 and 11, and at the same time, a mutual interval can be also controlled.

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 leveling the formwork and demolding, the trolley used to move the formwork must be strong and large. Along with this, there are many problems such as the operation mechanism of the formwork becomes complicated, it is troublesome to handle, and a large space is required 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 the formwork can be shaped easily. It is an object of the present invention to provide a movable outer formwork device for arch culverts that allows operations such as adjustment and demolding to be performed reliably and easily, 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, 1 is the formwork body, and the butter material 2 formed in an arch shape
are arranged in parallel at a required interval, connected by horizontal flaps (not shown), and a weir plate 3 is attached to the inside of the flap material 2. Further, as shown in the figure, this formwork I can be divided into two parts at the top as needed to form two formwork bodies +a.

lb, and may have a structure in which their top ends are rotatably connected by a pin 4 as shown by the arrow.

Reference numeral 5 denotes a running leg vehicle disposed at the lower part of both outside sides of the form body I, in which a supporting leg 7 equipped with wheels 6 is provided on a pedestal 8 so as to be adjustable up and down by a lifting mechanism 9 such as a hydraulic type or a screw type. The structure is as follows. The traveling caster 5 has a pair of parallel support arms 10.11 pivotally connected to the lower part of the form body 1 at a required distance vertically by pins 12.13. 14.15, it is connected to the pillar 8 in a pivotal manner. Therefore, the formwork body 1 and the support arm 10.
If and the pillar 8 form a link mechanism. A support arm 10 connects the traveling caster 5 and the form body 1.
11 is in an inclined state with its tip side lowered, and is provided with an adjusting means for changing the angle of inclination as appropriate. As shown in the figure, the inclination angle can be adjusted by a hydraulic or screw type between the part of the upper support arm 10 near the pin 14 and the part of the lower support arm 11 near the pin 13. The telescopic adjustment member 16 is connected to the pin 17,
The structure is constructed using I8.

Therefore, by expanding and contracting the expansion/contraction adjustment member I6, the form body l and the traveling caster vehicle 5 are connected to the support arm 10. Through the contact and separation of II, the relative movement in the vertical direction is performed, and the mutual distance 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 using the device of the present invention, culvert cloth foundation 1
9 is constructed to a predetermined height, and a rail 20 is 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 elevating mechanism 9 of the traveling caster vehicle 5 is operated to raise the pedestal 8 so that the lower end of the formwork body (■) does not come into contact with the ground 21.

In order 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 I6. In addition, positioning of the form body l in the height direction is performed by operating the elevating mechanism 9 of the traveling leg vehicle 5.
This can be done by adjusting the height position up and down.

After positioning, the pedestal 22 is inserted under the formwork 1 to stabilize the formwork 1.

The inner formwork 23 (indicated by chain lines in FIG. 1) is also set in response to the setting of the outer formwork body, but this inner formwork 26 is not particularly limited, and conventionally known devices can be used. Adopted as appropriate.

Concrete 24 is then placed between the inner and outer molds.

After the concrete 24 has hardened, the form body l is removed from the mold. To do this, by shortening the telescopic adjustment member 16, the form body l can be moved against the traveling vehicle 5 by the link action of the support arm 1011. As a result, the formwork l is pulled together and moved upward, and the formwork l is entirely covered with concrete 24.
This will result in more peeling. 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 formwork body 1 after demolding is further moved away from the concrete 24 sufficiently by operating the expansion/contraction adjustment member I6 and the elevation adjustment mechanism 9 to travel to the next construction position, and the above-mentioned operation is repeated to proceed with construction. They will be carried away.

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
0 protrudes outward from the pivot pin 14 to form an extension 26, and both ends of the telescopic adjustment member 16 are attached to the bracket 25 and the extension 26 by pivots 27 and 28L, 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 platform vehicle that is movable up and down, and the support arm is tilted so that its tip end is lower, and support is provided between both support arms or between one of the support arms and the pedestal. Since a telescopic adjustment member is installed to adjust the inclination angle of the arm, the formwork that makes up the large room can be stably supported and moved, and the height of the formwork can be adjusted as well as its movement in the transverse direction. This can be done by raising and lowering the support legs and expanding and contracting the telescopic adjustment member, making it easy to adjust when the formwork is vertical.In addition, peeling the formwork from the concrete and demolishing the formwork can be done with a single operation using the telescopic adjustment member only. It has many excellent effects as an external formwork for arch culverts, such as being extremely simple, efficient, and labor-saving, and has an extremely simple structure, light weight, and can be manufactured at low cost. It is something.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a leveled 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. FIG. 7 is a front view showing another embodiment of the separation adjustment mechanism. 1... Form body 2... Bata material 3... Shelter plate 5... Traveling caster 6... Wheel 7... Support leg 8...
... Pillar 9 ... Elevation adjustment mechanism 10.11 ... Support arm 16 ... Extension adjustment member 20 ... Rail 23 ...
・Inner formwork 24...Concrete 25...Bracket 26...Extension part Fig. 2': Fig. 43

Claims (1)

[Claims] 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 attached to the pedestal of a traveling caster vehicle having a support leg provided with a wheel at the distal end thereof so as to be adjustable up and down. Alternatively, 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 one of the support arms and the pedestal.