JPH0762338B2 - Forming equipment for concrete placing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial application field" The present invention relates to a formwork device for concrete pouring when constructing a concrete structure such as a dam.

“Prior Art” Conventionally, when performing concrete pouring such as a dam, a sliding formwork is used, for example. In this sliding formwork, concrete is poured into the formwork, and after the concrete is hardened, the formwork is slid upward to refill the formwork. In that case, a method of removing the mold from the concrete surface using a lifting machine such as a crane and setting it on the next lift is adopted. Then, in carrying out the work, the worker rides on the external scaffolding, slings the slide formwork and loosens the fixing bolts of the formwork, and after this work, the worker once descends from the scaffolding, , The crane operator operates the crane to refill the formwork, and when the refilling is completed, the worker again mounts the formwork on the external scaffold and hangs with the crane to the existing concrete using the fixing bolts. Concrete pouring is carried out sequentially by a series of operations such as fixing.

"Problems to be solved by the invention" Therefore, the entire equipment such as a lifting machine for driving the formwork becomes large-scale, and since the formwork is slid, the wall surface of the concrete structure to be constructed There is a problem that it is apt to be technically limited to a simple shape, and it is forced to work at a high place, so that it is restricted in safety and work efficiency.

The present invention effectively solves such a problem.

"Means for Solving Problems" A concrete placing formwork apparatus according to the present invention is provided with an upper formwork and a lower formwork for forming a wall surface of a concrete structure to be constructed, and the both formworks are provided. A center frame is provided between the upper and lower backs which are vertically rotatably connected to both molds, and between the center frame and both molds, an outer side in the connecting direction of both molds is provided. Of the above-mentioned, which is provided with a crank lever mechanism for vertically rotating and an actuator for driving the crank lever mechanism, and a forming surface is formed by an upper mold and a lower mold, and concrete pouring is carried out, The lower frame is separated from the concrete molding surface by operating the drive actuator and the crank lever mechanism, and the center frame is centered on the back of the upper frame as the center of rotation. The concrete pouring work is advanced by vertically rotating the molds vertically upward and sequentially switching the molds that are arranged to lift and arrange the lower molds above the upper molds.

[Embodiment] An embodiment of a concrete pouring form device according to the present invention will be described below with reference to FIGS. 1 to 4.

In order to form a wall surface (for example, a dam wall surface) of the concrete structure C to be constructed, the formwork device indicated by reference numeral 1 in the drawing,
Between the upper and lower molds 2 and 3 which are vertically divided, and the vertically spaced backs of the upper and lower molds 2 and 3 are vertically rotatable relative to both molds 2 and 3. A center frame 4 in a connected state, a crank lever mechanism 5 between the center frame 4 and both molds 2 and 3 for making the vertical rotation outside the connecting direction of both molds 2 and 3, and A supporting frame which is integrally mounted on both of the molds 2 and 3 by interposing between the driving actuators 6 of the crank / lever mechanism 5, the upper mold 2 and the lower mold 3, and the center frame 4. 7, the locking means (lock mechanism) 8 for suppressing the rotation between the two molds 2 and 3 and the center frame 4, and the mold device 1 are fixed to the wall surface of the existing concrete structure C. The fixing means 9 for this is the main component.

The details will be described. As shown in FIGS. 1 and 2, the upper mold form 2 and the lower mold form 3 are attached to the concrete structure C in the process of construction by a fixing means 9 so as to prevent downward fall prevention and the like, and As shown in FIG. 1, the inner surface formed by vertically assembling the two molds 2 and 3 constitutes a vertical molding surface, for example.

Between the rear sides of the two molds 2 and 3 and the center frame 4, the support frame 7 is rotated integrally with the molds 2 and 3 and by the rotary shaft 10 with respect to the center frame 4. It is movably (rotatably) attached, and is vertically rotatable between the two molds 2 and 3 and the center frame 4 at vertically spaced positions, and the relative rotation angle is It is 180 degrees as shown in FIG. The support frame 7 has a structure that also serves to reinforce the two molds 2 and 3.

The center frame 4 has left and right upper and lower brackets 11 rotatably connected to the support frame 7 by a rotation shaft 10, and the brackets 11 are integrally connected in a vertical direction (arrangement direction of both molds 2 and 3). And a horizontal frame 13 for integrally connecting the pair of left and right brackets 11 in the horizontal direction, and a locking plate 14 attached to the horizontal frame 13. is there.

In principle, the crank / lever mechanism 5 is driven by the connecting shaft 16 which reciprocates when the swing lever 15 is swung in the range of C'to C ", as shown in FIG. The crank 17 is used to rotate about the point A. The swing lever 15 is swingably attached by a pin 19D to a bracket 18 which is integral with the back surfaces of the two molds 2 and 3. The pin 19C is also provided between the tip of the rocking lever 15 and the connecting shaft 16 and between the connecting shaft 16 and the crank 17 (a part of the bracket 11 constitutes the crank 17 as shown in FIG. 1). , 19B is rotatably connected by a pin 19B, and the center frame 4 is rotated 180 degrees about the point A (rotating shaft 10) in FIG.

The drive actuator 6 is interposed between the rear surfaces of the two molds 2 and 3 and the pin 19C to swing the swing lever 15. The drive actuator 6 is composed of, for example, a hydraulic cylinder, and includes a speed reducer or the like. It is designed to directly obtain a large output at low speed without going through.

In the case where the locking means 8 has a relative angle formed by the lower mold 3 and the center frame 4 in the state shown in FIG. 1, that is, when the center frame 4 is located above the lower mold 3. In addition, the lock cylinder 20 locks the lock pin
The lower mold 3 and the center frame 4 are fixed to each other by projecting 21 and inserting them into the engaging holes 22 of the locking plate 14.

The fixing means 9 is for fixing the formwork apparatus 1 or the upper formwork 2 thereof to the concrete structure C under construction,
In the example of FIG. 1, anchor bolts and the like are projected from the wall surface of the concrete structure C, and the projections are engaged with the recesses and the like of the two molds 2 and 3 to support them. ing.

Hereinafter, an example of a concrete pouring process using the concrete pouring formwork apparatus 1 configured as described above will be described. The concrete structure C in this case is, for example, a vertical wall of a dam.

First, the lower formwork 3 is attached to an existing wall surface or bar arrangement of the concrete structure C by a fixing means, and as shown in FIG. 1, both formwork 2 and 3 form a vertical molding surface. At the same time, the locking means 8 is actuated, and the lock pin 20 is positioned above and below the lock pin.
21 is projected and inserted into the engaging hole 22 of the locking plate 14 to fix the two molds 2 and 3 and the center frame 4 together.
That is, both are integrated as shown in FIG.

Concrete pouring work is performed inside the upper formwork 2 to obtain a state as shown in FIG. 4 (A).

After the newly placed concrete is hardened, the locked state of the upper formwork 2 by the locking means 8 is released to make the upper formwork 2 and the center frame 4 vertically rotatable, and the drive actuator The crank lever mechanism 5 is operated by 6 and the center frame 4 is rotated 180 degrees with respect to the upper frame 2 as shown in FIGS. 4 (A) and 4 (B). In this case, the entire load of the formwork apparatus 1 is supported by the fixing means 9 in the upper formwork 2 and the concrete structure C.

When the lower formwork 3 is separated from the wall surface of the concrete structure C, the contact parts of the lower formwork 3 are connected to the rotary shaft.
Since it is guided outward along the locus of an arc with 10 as the center of rotation, the engagement between the anchor bolt and the recess in the fixing means 9 can be released smoothly.

In the state of FIG. 4 (B), the locking means 8 of the upper mold 2 is operated to cause the lock pin 21 to project by the lock cylinder 20 and be inserted into the engagement hole 22 of the lock plate 14. , The upper frame 2 and the center frame 4 are fixed. Next, the setting of the lower mold 3 is performed. That is, in the state shown in FIG. 4 (B), after the lock state of the lower mold 3 is released by the locking means 8, the drive lever 6 of the lower mold 3 causes the crank / lever mechanism 5 to move in the reverse direction to the front ( It moves in the direction of the concrete structure C to be constructed), and the two molds 2 and 3 are in the vertical state, as shown in FIG. 4 (C). Further, the supporting state of the lower mold 3 by the fixing means 9 is prepared.

Then, the locking means 8 in the lower mold 3 is operated, and by the locking cylinders 20 positioned above and below,
Engage the lock pin 21 and engage the locking plate 14
Then, the lower formwork 3 and the center frame 4 are fixed to each other. That is, as shown in FIG. 1, both molds are integrated. This state is similar to the initial state.

After performing the concrete pouring work inside the lower formwork 3 to cure the concrete, the upper formwork 2
The steps such as unlocking the locked state by the locking means 8 and vertically rotating the upper mold 2 upward by 180 degrees are repeated. That is, in the state of FIG. 4 (C), the upper mold 2
By substituting the lower mold 3 and the lower mold 3, the repetition of the steps shown in FIGS. 4A to 4C can be explained.

In this way, the formwork located at the bottom (lower formwork 3) is lifted and arranged above the formwork located at the upper part (upper formwork 2), and the formwork is sequentially switched to perform concrete pouring. It is to advance the work.

Therefore, according to the concrete pouring formwork apparatus of one embodiment, one of the upper and lower two formwork 2 and 3 is always fixed to and supported by the concrete structure C,
Moreover, the lifting machine such as a crane described in the related art is not required for the rearrangement. Further, the mold releasing such as the rearrangement is automatically performed by rotating the lower mold 3 in the direction of the back portion, and the fixing means 9 is also released at the same time. Therefore, the apparatus can be automated. By reducing labor and manpower in concrete placing work, it is possible to reduce costs. Furthermore, the sequence control of a series of concrete placing steps enables fully automatic control.

In the fixing means 9 in one embodiment, the anchor bolts and the like are projected from the wall surface of the concrete structure C to engage the recesses and the like of the two molds 2.3, but both molds 2.3
In the case of projecting a projection from the above toward the concrete structure C, placing concrete around the projection, supporting the formwork apparatus 1 in a temporarily embedded state, and moving the lower formwork 3 upward. It is also possible to use the fact that the lower formwork 3 is separated from the wall surface so that it can be separated from the concrete layer. In this example, it is not necessary to embed anchor bolts or the like. Further, the angle set by the upper mold 2 and the lower mold 3 is not limited to a vertical surface, and even if the set angle is changed, the contact surface between the mold and the concrete structure C is almost the same as the surface. Since they are separated so as to be orthogonal to each other, they are less affected by the wall surface of the concrete structure C, and curved surface construction is possible.

"Effects of the Invention" According to the concrete pouring formwork apparatus of the present invention, the following effects can be obtained.

(1) The crank lever mechanism is operated by the drive actuator to vertically rotate the lower mold frame with respect to the center frame, and the upper mold frame is arranged above the upper mold frame. Since it can be performed, the concrete pouring work can be carried out continuously, and since the formwork is separated from the concrete part, it has excellent releasability from the concrete part and release of the fixing means of the device etc. Can be simplified and can be automated.

(2) The concrete formwork device can be unmanned, and it is not necessary to use a lifting machine such as a crane to replace the formwork, and the cost can be reduced.

(3) Since the mold is directly separated from the wall surface, it is less restricted by the shape and unevenness of the contact portion, and the concrete surface of the concrete surface can be changed by changing the set angle between the upper mold and the lower mold. Curved construction is possible.

(4) Since the actuator is used as the drive source to directly obtain the low speed and large output without using the speed reducer, the entire apparatus and the drive source can be downsized.

(5) By automating the formwork device, workers can be freed from dangerous work at high places.

[Brief description of drawings]

1 to 4 show an embodiment of a concrete casting formwork apparatus according to the present invention. FIG. 1 is a side view, FIG. 2 is a front view, and FIG. 3 is a crank lever mechanism. And FIG. 4A, FIG. 4B, and FIG. 4C are explanatory views of the up / down switching operation of the mold in the mold device. C ... Concrete structure, 1 ... Concrete formwork device, 2 ... Upper formwork, 3 ... Lower formwork, 4 ... Center frame, 5 ... Crank lever mechanism, 6 ... Drive actuator, 7 ... Support frame, 8 ... Locking means (lock mechanism), 9 ... Fixing means (anchor bolt),
10 …… Rotary axis, 11 …… Bracket, 12 …… Vertical frame, 13 …… Horizontal frame, 14 …… Lock plate, 15
…… Rotating lever, 16 …… Coupling shaft, 17 …… Crank, 18…
… Bracket, 19B / 19C / 19D …… Pin, 20 …… Lock cylinder, 21 …… Lock pin, 22 …… Engagement hole.

Front page continuation (72) Inventor Shigeyoshi Matsuda 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Yoshinori Yugami 2-16-1, Kyobashi, Chuo-ku, Tokyo Ken Shimizu Incorporated Co., Ltd. (72) Inventor Shinya Kubota 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu K.K. In the company

Claims (1)

[Claims] 1. An upper formwork and a lower formwork for forming a wall surface of a concrete structure to be constructed are provided, and a vertical direction is relatively provided between the formwork between vertically spaced back portions of the formwork. A pivotally connected center frame is provided, and between the center frame and both molds, a crank lever mechanism for making the vertical rotation outside the connecting direction of both molds and an actuator for driving the crank lever mechanism are provided. A formwork device for concrete pouring, characterized by being provided respectively.