JPH0410949B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a mobile formwork apparatus used for constructing concrete structures such as dams and bridge piers.

``Problems to be solved by conventional technology and inventions'' When constructing concrete structures such as dams and bridge piers, the so-called step-form construction method is usually used, in which the formwork is moved upwards and concrete is then poured. ing.

In this case, the formwork is often replaced by several skilled workers using a crane.

However, in this case, only one unit can be replaced at a time, which is inefficient.

It takes a lot of effort and time to position and attach and detach bolts such as dummy bolts, seat bolts, and support bolts.

Work is often done at heights, and positioning work on formwork suspended by a crane is quite dangerous.

Highly accurate formwork positioning requires extensive experience and skill on the part of workers.

There are drawbacks such as.

Therefore, in recent years, mobile formwork equipment with self-lifting means for the formwork has been proposed (e.g.,
125330, JP 54-63521, JP
54-108430).

However, in this case, although it is possible to raise the formwork using a lifting means, the attachment and detachment of dummy bolts, Siebolds, support bolts, etc., still relies on manual labor, and it is difficult to locate (locate bolt holes) and remove bolts. Attaching and detaching requires a lot of effort and time.

The formwork structure becomes complicated, as two levels of scaffolding are required for positioning (locating bolt holes) and bolt attachment/detachment work.

There are drawbacks such as.

The present invention aims to provide a mobile formwork device that is free from such inconveniences.

"Means for Solving Problems" The present invention provides a movable formwork device in which a formwork is raised by external force or self-lifting means, in which slits are vertically penetrated at appropriate positions in the main weir plate, and the slits are made to correspond to the slits. A slit shedding plate is provided to close the slit, a supporting bolt to be embedded in the poured concrete is removably connected to the slit shedding plate, and the supporting bolt is equipped with a formwork support clamp. do.

Note that, as the external lifting means, for example, a crane or the like is used. Further, as the self-lifting means, for example, a drive mechanism operated by an electric motor, a hydraulic cylinder, etc. is self-equipped.

``Operation'' Since the structure is as described above, the formwork is held by the support bolts embedded in the previously poured concrete and the formwork support clamps attached to these, and when replacing the formwork, Loosen and tighten the formwork support clamps before and after working the lifting means, attach slit shedding plates to the open slits of the raised formwork each time with support bolts and formwork support clamps, and remove the used lower slits. Remove the weir plate.

"Example""Example of self-ascent" [Part 1] Figures 1 to 4 show a first example in which the formwork is integrally equipped with a work scaffold.

In the figure, 1 is a formwork, 2 is a work scaffold fixed to the formwork, and 3 is a self-lifting means provided on the formwork.

The formwork 1 has a pair of slits 12, 12 running vertically on the left and right sides of the main weir plate 11, and a plurality of horizontal end pieces 13..., vertical end pieces 14..., and reinforcing vertical end pieces 15... behind the main weir plate 11. It is set up. In particular, the vertical end thickness 14...
A pair of slits 12, 12 are arranged in parallel at both edges thereof, and are extended downward to about twice the length of the main weir plate 11.

The slits 12, 12 are provided with two slit weir plates 16, 16 above and below to close the slits, respectively, and both sides of the slit plates are supported by vertical end pieces 14. It is formed to be slightly shorter than the vertical end thickness 14, and a metal reinforcing plate 17 is attached to the back.

In addition, each slit weir plate 16... and the reinforcing plate 1
7... are removably penetrated and linked with support bolts 18 which also serve as anchors to be embedded in the poured concrete A, and each of the support bolts is equipped with formwork support clamps 19....

The formwork support clamp 19... is provided with a support plate 191 whose both ends are engaged with each pair of vertical end thicknesses 14, 14 on both sides of the slit, and a through hole is bored in the center of the support plate so that the support bolt can be inserted into the support plate 191. Insert it into 18..., Natsuto 18
I try to tighten it with 1...

The work scaffold 2 has support arms 21 protruding from the lower ends of vertical ends 14, and a scaffold board 22 placed on the support arms.

The self-lifting means 3, 3 are provided at the bottom of the vertical ends 14 or on the work scaffold 2, and are designed to take reaction force to the support bolts 18. Specific examples include the winch drive method shown in FIG. 5, the chain drive method shown in FIG. 6, the screw drive method shown in FIG. 7, and the like. In FIG. 5, 31 is an electric winch;
32 is a wire rope wound around the electric winch. In FIG. 6, 33 is an electric motor;
4 is a rotating shaft driven by the electric motor, 35, 35
is a sprocket provided on the rotating shaft; 36 is a sprocket provided on the rotating shaft;
This is the chain that is fed by the sprocket. 7th
In the figure, 33 is an electric motor, 34 is a rotating shaft driven by the electric motor, and 39 is a screw rod that is rotated in conjunction with the rotating shaft via worm gears 37 and 38.

In FIGS. 1 and 2, 4 is a vertical end thickness adjustment jack.

Next, referring to FIG. 4, the operation at the time of refilling will be explained.

() The pouring is complete.

() When the pouring is completed, the formwork support clamps 19 are loosened, the main weir plate 11 is removed from the mold, and the self-lifting means 3, 3 are activated.

() With the operation of the self-lifting means 3, 3, the formwork 1
The slit weir plates 16..., the reinforcing plates 17..., the support bolts 18... and the formwork support clamps 19... are moved up.

() When the formwork 1 has risen to a predetermined height, the self-lifting means 3, 3 are stopped, and the loosened formwork support clamps 19 are tightened again and installed.

() The slit weir plate 16 left after installation...
etc., the lower ones are reinforcing plates 17, 17, support bolts 18, 18, formwork support clamp 19,
Remove it together with 19, move it onto the upper one, fit it into the slits 12, 12 again, activate the formwork support clamps 19, 19 and attach it to the vertical end 14..., and attach the support bolts that take the reaction force from the self-lifting means to the upper stage. Switch to , and complete the reordering. Then concrete is poured. This transition returns it to its original state.

[Part 2] Figures 8 and 9 show a second embodiment in which the formwork is equipped with a sliding work scaffold.

In this case, the number of the pair of slits 12', 12' is further increased in the previous example, and a sufficiently long longitudinal end for guides 14' is arranged at both edges of each of the slits, and each longitudinal end for guides is By attaching guides 14''... to the outside of the guides and fixing these guides to the horizontal end members 13..., the vertical end members 14'... for guides can be fixed to the guide 1.
4″... is slidably supported.

Further, the work scaffold is provided at the lower end of the guide vertical end thick 14'. That is, support arms 21 are provided protruding from the lower ends of the vertical guide shafts, and the scaffolding boards 22 are mounted on the support arms, and as in the previous example, the vertical shafts 14...
It is not set up in

The increased slits 12', 12' are equipped with slit weir plates 16..., reinforcing plates 17..., and support bolts 18, as in the case of the other slits 12, 12 in the previous example.
...and formwork support clamps 19... are equipped.

The self-lifting means 3, 3 are provided at the bottom of the guide vertical end 14' or between the work scaffolding 2 and the formwork 1, and are particularly useful for pushing up the formwork 1 and the work scaffolding 2.
It is designed to be capable of both lifting and lifting. For example, the screw drive method shown in FIG. 7 is suitable.

The operation at the time of rearranging with reference to FIG. 9 will be explained as follows.

() The pouring is complete.

() When the pouring is completed, loosen the formwork support clamps 19 on the vertical end thickness 14 side, and remove the main weir plate 11.
demold and activate the self-lifting means 3, 3,
All slit weir plates 16..., reinforcing plates 17
..., support bolt 18... and formwork support clamp 1
9. Raise the formwork 1 while leaving... Formwork 1
When it reaches the specified position, stop it and
Tighten the formwork support clamps 19 again.

() After that, loosen the formwork support clamps 19 on the guide vertical end thickness 14' side, operate the self-lifting means 3 again, and as before, remove all the slit weir plates 16... and reinforcing plates. 17..., the work scaffold 2 is raised with the support bolts 18... and formwork support clamps 19... remaining. When the formwork 1 rises to a predetermined position, it is stopped and the formwork support clamps 19 are tightened again.

() Next, among the slit weir plates 16, etc. that remained without being raised, lower ones were replaced with reinforcing plates 17.
..., support bolt 18... and formwork support clamp 1
9..., move it onto the upper one, fit it into the slits 12, 12, 12', 12' again, and activate the formwork support clamps 19... to vertical end thickness 14..., vertical end thickness 14' for guide. Attach it to
Finish rearranging. Then concrete is poured. This transition will put you in the first position.

Note that the work scaffold 2 may be provided in two stages, one above the other.

"Effects of the Invention" According to the present invention, the formwork can be easily replaced by loosening and tightening the formwork support clamps and by operating the external force or self-lifting means, and the formwork can be easily replaced using dummy bolts and There is no need to attach and detach Sibolts, support bolts, etc. many times, and therefore, much labor and time are not required for positioning (locating bolt holes) and attaching and detaching the bolts, and the work scaffold is simple. To easily and efficiently perform refilling work safely and without requiring special experience or skill on the part of the worker.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a rear view of the first example, FIG. 2 is a vertical cross-sectional side view of the same example, and FIG. 4 is an explanatory diagram of the operation of the same example, FIGS. 5 to 7 are rear views showing specific examples of self-lifting means in the same example, FIG. 8 is a rear view of the second example, and FIG. 9 is a rear view of the second example. is an explanatory diagram of the operation of the same example. 1...Formwork, 2...Working scaffold, 3...Self-lifting means, 11...Main weir plate, 12, 12'...Slit, 13...Horizontal thick, 14...Vertical thick, 14'
...Vertical end thickness for guide, 14" ...Guide, 16...
...Slit plate, 17... Reinforcement plate, 18...
Support bolt, 19... Formwork support clamp, 21...
...Support arm, 22...Scaffold board, 33...Electric motor, 3
4... Rotating shaft, 35... Sprocket, 36...
Chain, 37, 38... Worm gear, 39...
... Screw Rott, 181 ... Natsuto, 191
...Support plate.

Claims (1)

[Scope of Claims] 1. In a movable formwork device in which the formwork is lifted by external force or self-lifting means, a slit is provided vertically through a main weir plate at an appropriate position, and a weir for the slit corresponds to and closes the slit. A movable formwork apparatus characterized in that a plate is provided, a support bolt to be embedded in poured concrete is removably linked to the slit weir plate, and the support bolt is equipped with a formwork support clamp. 2. The movable formwork apparatus according to claim 1, wherein the formwork is integrally equipped with a work scaffold. 3. The movable formwork apparatus according to claim 1, wherein the formwork is equipped with a slidable work scaffold.