JP3593607B2 - Slip form equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a slip-form apparatus used when a concrete structure such as a chimney or a caisson is constructed by a slip-form method.
[0002]
[Prior art]
Conventionally, a slip-form construction method for constructing a tower-like building such as a chimney using concrete is, as shown in FIG. Climbing consisting of a climbing jack 3 provided on a connecting portion 1b for integrally connecting the upper ends of both hanging portions 1a, 1a, and a climbing rod 4 standing upright on a concrete molding portion. While the sliding molds 2 and 2 are raised together with the yoke 1 by the mechanism 5, the concrete placing operation is performed continuously.
[0003]
In the figure, reference numeral 6 denotes a guide pipe suspended from the yoke 1, and the climbing rod 4 is inserted into the guide pipe 6.
[0004]
Such a conventional slip-form construction method is basically a continuous construction for 24 hours. However, in Japan, construction can often be performed only in the daytime in consideration of the local residents around the site.
[0005]
In this case, in order to stop the rise of the slip form at night, the just-cast concrete body and the sliding formwork adhere to each other, so that when the construction is resumed the next morning, the equipment cannot be lifted as it is.
[0006]
For this reason, as one countermeasure, there is a case where an operation of repeating a small up-and-down movement referred to as an edge cutting operation is performed for several hours at night until the poured concrete is hardened.
[0007]
[Problems to be solved by the invention]
However, there is a problem in that this work restricts the worker to the site even in the middle of the night and performs this action in a situation where night work is prohibited.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a slip-form apparatus capable of peeling a sliding formwork at the beginning of work by using a driving force of a climbing jack without requiring a new drive device for peeling the sliding formwork. is there.
[0009]
[Means for Solving the Problems]
The features of the slip foam apparatus of the present invention for solving the conventional problems as described above and achieving the intended purpose include a sliding mold facing each other, and a yoke supporting both the molds in an opposed arrangement, A slip- forming device comprising a climbing mechanism for vertically moving the yoke, a telescopic link comprising a cylindrical cylinder portion and an insertion / removal rod which is inserted into one end of the cylinder portion and which can enter and exit by a predetermined length; Sano and a fixed length link, said a back yoke of the sliding formwork, and diagonally upward of the telescopic link toward the yoke side from the mold, obliquely downward of the constant length links and the both ends respectively yoke The sliding formwork is pivotally connected to the back of the formwork so that the sliding formwork is at a predetermined concrete molding position when the telescopic link is in the longest state. A.
[0010]
In addition, each of the sliding formwork is provided with a horizontal bulge on the upper and lower surfaces thereof, and each bulge can pivotally support one or more pairs of telescopic links and each end of the fixed length link. Preferably, the yoke comprises a pair of hanging parts hanging down on both sides of the concrete molding part, and a connecting part connecting the upper ends of the hanging parts to each other. The connecting part supports a climbing mechanism, It is preferable that the sliding formwork is supported on the opposing surface side of the portion with a telescopic link and a fixed length link, and a horizontal load receiving member that contacts the surface of the previously formed concrete body is provided at the lower end of the hanging part. .
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0012]
1 to 4 show a slip-form apparatus for constructing a concrete structure having a square cross section in the shape of a cylinder. In the figures, reference numeral 10 denotes a yoke, and 11, 11 are installed in opposition to each other. Are the inside and outside sliding formwork that are the concrete casting parts.
[0013]
As shown in FIG. 1, the yoke 10 supports one or a plurality of inner and outer molds 11, 11 assembled in a rectangular cylindrical shape at each side of the rectangular shape. Each yoke 10 is formed by combining an H-shaped steel or the like, and as shown in FIG. 2, a connecting portion 10 a and both connecting portions 10 a are provided above the two mold frames 11, 11 in a direction orthogonal thereto. And a pair of hanging parts 10b, 10b hung on the back side of both mold frames 11, 11.
[0014]
A climbing jack 12 is provided at a connecting portion 10a of the yoke 10. The climbing jack 12 holds a vertically standing climbing rod 13 through a concrete casting portion, and can move up and down by taking a reaction force against the climbing rod 13. It constitutes a climbing mechanism. Although the climbing jack 12 is not shown in the drawing, it has a chuck having a center hole through which the center climbing rod 13 is inserted as an example, and repeats the expansion and contraction of the jack while alternately holding the upper and lower chucks. By using things that can be raised. The lowering operation can be performed by temporarily releasing the holding function of the upper and lower chucks.
[0015]
The lower ends of the hanging parts 10b, 10b of the yoke 10 are curved toward the surface side of the concrete body A previously cast and formed. The member is attached.
[0016]
Inner and outer sliding molds 11, 11 are supported via links at intermediate heights between the hanging portions 10b, 10b of the yoke 10. Belts 15, 15 made of H-shaped steel are fixed to the sliding molds 11, 11 at the top and bottom of the back in a horizontal arrangement, and a telescopic link 16 is provided between the both bellies and the hanging portion 10b of the yoke 10. The molds 11 and 11 are supported by the yoke 10 by interposing a pair of links consisting of a fixed length link 17 and a fixed length link 17.
[0017]
As shown in FIGS. 3 and 4, the telescopic link 16 includes a cylindrical cylinder portion 16a and an access rod 16b which is inserted into one end of the cylinder portion 16a and which can enter and exit by a certain length. It is pivotally attached to a bracket 18 projecting from the upper end, the other end is directed obliquely upward, and the tip is pivotally attached to a bracket 19 projecting from the hanging part 10b.
[0018]
On the other hand, the fixed length link 17 is a fixed length link that does not expand and contract, one end of which is pivotally attached to a bracket 20 protruding below the protruding portion 15a, and the other end is directed obliquely downward. The tip is pivotally attached to a bracket 21 projecting from the hanging member 10.
[0019]
Then, as shown in FIG. 3, when each of the telescopic links 16 for the up and down bulging is in the most extended state, the formwork 11 is located at a predetermined concrete molding position.
[0020]
In the drawing, reference numeral 22 denotes a guide pipe suspended from the yoke 10.
[0021]
In the normal stop state of the slip form configured as described above, as shown in FIG. 3, the telescopic link 16 is extended by the weight of the mold frames 11, 11, and is located at a predetermined concrete molding position. Then, by raising the yoke 10 by the climbing mechanism, this state is maintained and a predetermined concrete surface is sequentially formed.
[0022]
On the other hand, if the work is stopped for a certain period of time, such as at night, a large force is required to move in the ascending direction again due to the adhesive force of the skeleton concrete on the formwork surface. In this case, as shown in FIG. When the yoke 10 is slightly lowered, only the yoke is lowered while the form 11 is prevented from lowering due to the adhesion of the concrete surface, and a compressive force acts on the telescopic link 16. The form 11 is horizontally moved in a direction away from the concrete surface, and thereby is separated from the concrete surface.
[0023]
At this time, since the roller at the tip of the hanging part 10b of the yoke is in contact with the surface of the concrete body, this acts as a reaction force receiving part below the yoke, and the bending of the hanging part 10b of the yoke toward the concrete body is prevented. Peeling is performed.
[0024]
Then, by the peeling, the descent-preventing force is removed, the descent falls by its own weight, and returns to the position in contact with the concrete body surface again.
[0025]
Next, by raising the yoke 10, the molds 11, 11 rise while contacting the concrete surface, and continuous work can be continued.
[0026]
【The invention's effect】
As described above, in the slip foam device according to the present invention, the telescopic link including the cylindrical cylinder portion and the insertion / removal rod that is inserted into one end of the cylinder portion and that can enter and exit by a predetermined length, and the fixed length that does not expand and contract. A long link and a back surface of the sliding formwork and the yoke, a diagonally upward telescopic link from the formwork toward the yoke side, and a fixed length link diagonally downward that does not expand and contract. The sliding formwork is at the predetermined concrete molding position when the telescopic link is in the longest state, so that the work is stopped for a certain period of time and the frame concrete and the formwork adhere to each other. When the work is started, the formwork and the slab concrete are separated only by slightly lowering the yoke, and the formwork operation is continued as in the past. Must be allowed to eliminate, significant labor savings can be made.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a slip foam device according to the present invention.
FIG. 2 is a cross-sectional view showing a state in which a mold of the above-described slip foam device is at a molding position.
FIG. 3 is a cross-sectional view showing a form-peeling state of the above-described slip foam device.
FIG. 4 is a plan view showing a conventional slip forming apparatus.
FIG. 5 is a cross-sectional view of a yoke part according to the embodiment.
[Explanation of symbols]
A Concrete body 10 Yoke 10a Connecting part 10b Hanging part 11 Sliding formwork 12 Climbing jack 13 Climbing rod 14 Roller 15 Upset 16 Telescopic link 16a Cylinder 16b Out / in lot part 17 Fixed length link 18 Bracket 19 Bracket 20 Bracket 21 Bracket 22 Guide pipe

Claims (3)

A sliding form machine comprising sliding forms facing each other, a yoke supporting the two forms in an opposed arrangement, and a climbing mechanism for moving the yokes up and down.
It has a telescopic link consisting of a cylindrical cylinder part and an insertion / removal rod that is inserted into one end of the cylinder part and can enter and exit by a fixed length, and a fixed length link that does not expand and contract and has a fixed length.
A back yoke of the sliding formwork, and diagonally upward of the telescopic link toward the yoke side from the mold, each of both ends and obliquely downward of the fixed length link is pivotally supported on the rear the yoke and the mold A slip-form device, wherein the sliding form is connected to a predetermined concrete molding position when the telescopic link is in the longest state. Claims are provided in which a vertical protuberance is provided on the back and upper surface of each sliding formwork, and each protuberance pivotally supports one or more pairs of telescopic links and each end of a fixed length link. 2. The slip form device according to 1. The yoke is composed of a pair of hanging portions hanging down on both sides of the concrete molding portion, and a connecting portion connecting the upper ends of the hanging portions to each other. The connecting portion supports a climbing mechanism, and the opposing surfaces of the hanging portions. The sliding formwork is supported on each side by a telescopic link and a fixed-length link, and a horizontal load receiving member is provided at a lower end portion of the hanging part, which is in contact with a surface of the concrete body formed earlier. 3. The slip foam device according to 2.

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