JP3227746U - Concrete placement structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete casting structure having extremely excellent workability.
SOLUTION: A concrete casting structure 1 has a rectangular formwork opening 20 having an opening height H1 and an opening width W1 formed in a concrete formwork 2; a frame height and an opening width higher than the opening height H1. A frame plate portion having a frame width substantially the same as that of W1 and arranged so as to abut on the inner surface of the mold, and a hook attached to the frame plate portion and hooked on the mold and extending to the outside of the mold. A casting and loading device 3 that integrally has a stop portion 5 and a shooter portion 6 that is attached to the frame plate portion or the hook portion and for loading concrete into the formwork through the internal opening of the frame plate portion; To be equipped.
[Selection diagram] Fig. 1

Description

The present invention relates to a concrete placing structure used for placing concrete at an intermediate position of a formwork.

Traditionally, architectural and civil engineering structures have generally been constructed by assembling reinforcing bars in the formwork and placing concrete. Since this concrete is a mixture of cement, aggregate, water and the like, if the falling distance of the concrete exceeds a predetermined height (for example, 1.5 meters), the concrete may separate. Therefore, when making a tall structure, concrete is divided into predetermined heights in order to prevent separation of concrete.

On the other hand, if the concrete is constructed by dividing it into predetermined heights in this way, a concrete curing period is required for each predetermined height, which causes a problem that the entire construction period becomes long and the cost increases. There is a point. Therefore, for example, in Patent Document 1, a concrete casting frame including a frame body in which a concrete input port penetrating the formwork is formed, a lid body for closing the concrete input port, and a lid restraint is provided. It is disclosed.

Japanese Unexamined Patent Publication No. 9-141631

However, the structure of Patent Document 1 is premised on being applied to a caisson using a steel formwork. Therefore, when applied to a general structure using a plywood formwork, it is necessary to install hardware in advance on the formwork side, which is not excellent in workability.

Therefore, it is an object of the present invention to provide a concrete casting structure having extremely excellent workability.

In order to achieve the above object, the concrete casting structure of the present invention comprises a rectangular formwork opening having an opening height and an opening width formed in a concrete formwork; and a frame height higher than the opening height. A frame plate portion having a frame width substantially the same as the opening width, which is arranged so as to abut on the inner surface of the mold, and a frame plate portion attached to the frame plate portion and attached to the mold. A hooking portion that is hooked and extends to the outside of the formwork, and is attached to the frame plate portion or the hooking portion, and concrete is formed through the internal opening of the frame plate portion. It is provided with a shooter portion for throwing into the inside and a casting throwing device integrally having.

As described above, the concrete casting structure of the present invention is substantially the same as the rectangular formwork opening having the opening height and the opening width formed in the concrete formwork; the frame height and the opening width higher than the opening height. A frame plate portion having a frame width of the above, which is arranged so as to abut on the inner surface of the mold, and a hook portion which is attached to the frame plate portion and hooked on the mold. It integrally has a hooking portion that extends to the outside of the formwork and a shooter portion that is attached to the frame plate portion or the hooking portion and for pouring concrete into the formwork through the internal opening of the frame plate portion. It is equipped with a casting input device and; With such a configuration, the concrete placing device can be easily fixed to the formwork by hooking the hooking portion on the formwork, so that the concrete placing structure has extremely excellent workability.

It is a perspective view which looked at the concrete casting structure from the front. It is a perspective view which looked at the concrete casting structure from the back. It is sectional drawing which cut the concrete casting structure. It is a perspective view of the driving input device. It is a procedure diagram explaining the use procedure of a concrete placing structure. It is a procedure diagram explaining the use procedure of a concrete placing structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the components described in the following examples are examples, and the technical scope of the present invention is not limited to them.

(overall structure)
First, the overall configuration of the concrete casting structure 1 of the present invention will be described with reference to FIG. As shown in FIG. 1, the concrete casting structure 1 of the present invention includes a rectangular formwork opening 20 in which a concrete formwork 2 is formed, and a casting input device 3 attached to the formwork opening 20. , Is generally composed of.

The formwork 2 is a tall plywood formwork, and a rectangular formwork opening 20 is formed in the formwork 2. The formwork opening 20 is a rectangular opening having a predetermined opening height H1 and a predetermined opening width W1. The formwork opening 20 is preferably installed at a predetermined height or less from the concrete driving surface.

That is, in general, when placing concrete, if the height of the formwork is large, a loading port is provided in the formwork, or a vertical chute or a discharge port of a transport pipe is lowered to near the driving surface to cast concrete. Must be crowded. The standard height difference between the discharge port and the driving surface is 1.5 m or less in order to prevent the concrete from separating. Specifically, the formwork opening 20 can have a size of 250 mm × 250 mm.

(Configuration of casting device)
Then, in this embodiment, the casting loading device 3 is attached to the formwork opening 20. As shown in FIGS. 1 to 4, the driving loading device 3 is formed of a steel plate, and has a frame plate portion 4, a hooking portion 5 attached to the frame plate portion 4, the frame plate portion 4, and the frame plate portion 4. / Or a shooter portion 6 attached to the hook portion 5 is integrally provided. Further, after the concrete is placed, the lid plate portion 8 is installed so as to close the opening as shown in the figure. To put it the other way around, the lid plate portion 8 is not installed at the time of placing concrete.

The frame plate portion 4 has an internal opening 40 inside, and is formed in a U-shaped or square-shaped flat plate shape by a thin steel plate (for example, a steel plate having a thickness of 2 mm), and the above-mentioned mold opening 20 It has a frame height H2 higher than the opening height H1 and a frame width W2 substantially the same as the opening width W1 of the mold opening 20. As shown in the drawing, the frame plate portion 4 is arranged on the back surface side of the mold 2 so as to be in contact with the inner surface (back surface) of the mold 2. In addition, the side edge 4a of the frame plate portion 4 is bent to the back side so that it can be easily taken in and out through the form opening 20. Further, since the side edge 4a of the frame plate portion 4 is bent in this way, it is possible to prevent the gap between the frame plate portion 4 and the cement glue from leaking.

In the state where the casting device 3 is installed in the formwork opening 20, the upper edge 41 and the lower edge 42 of the frame plate portion 4 are in a state of being overlapped on the upper and lower sides of the formwork opening 20. As will be described later, the amount of overlap (height) is larger in the upper edge 41 than in the lower edge 42.

The hooking portion 5 is formed of a steel plate, is attached to the frame plate portion 4, and is hooked on the mold 2, and extends to the outside of the mold 2. Specifically, the hooking portion 5 is an upper hooking portion 51 extending upward from the vicinity of the upper edge of the formwork opening 20 and a lower hooking portion hooked on the lower edge of the formwork opening 20 in the installed state. It is composed of a stop portion 52 and.

The upper hooking portion 51 sandwiches the formwork 2 with the upper edge 41 of the frame plate portion 4. That is, the upper hooking portion 51 extends diagonally upward toward the front side so as to form a predetermined gap 53 with the frame plate portion 4. Further, the length (height) of the upper hooking portion 51 and the depth of the gap 53 are made longer (deeper) than that of the lower hooking portion 52. Further, the upper edge 41 of the frame plate portion 4 extends to a higher position than the tip position of the upper hook portion 51.

Here, the diagonal gap 53 formed between the upper hooking portion 51 and the frame plate portion 4 is set to be slightly separated from the outer surface of the frame plate portion 4. Then, the fixing rod 7 is bridged and pushed into the left and right gaps 53. As the fixing rod 7, for example, a steel round bar or a deformed reinforcing bar can be used.

When the fixing rod 7 is pushed into the diagonal gap 53, the casting input hardware 3 is pressed against the formwork 2 by the wedge effect. That is, since the gap 53 is formed so as to open diagonally upward, the front side of the frame plate portion 4 is pressed against the back side (back side) of the formwork 2 by pushing the fixing rod 7 into the gap 53 from above. It has become like.

Similarly, the lower hooking portion 52 sandwiches the formwork 2 with the lower edge 42 of the frame plate portion 4. That is, the lower hooking portion 52 extends diagonally downward toward the front surface so as to form a predetermined gap 54 with the frame plate portion 4. Further, the length (height) of the lower hooking portion 52 and the depth of the gap 54 are shorter (shallow) than the upper hooking portion 51. Further, the tip position of the lower hook portion 52 and the tip position of the lower edge 42 of the frame plate portion 4 are substantially the same height.

Here, the diagonal gap 54 formed between the lower hook portion 52 and the frame plate portion 4 is made to be in contact with the outer surface of the frame plate portion 4. That is, the width of the gap 54 is substantially the same as the thickness (width) of the mold 2.

The shooter portion 6 is formed in a groove shape (U-shape) having a side plate and a bottom plate by bending a single steel plate, and is attached to the frame plate portion 4 and / or the hook portion 5. As for the concrete received by the shooter portion 6, the concrete is thrown into the form 2 through the internal opening 40 of the frame plate portion 4. The shooter portion 6 is obliquely attached so that the received concrete flows into the formwork 2 so that the formwork 2 side is lowered. Further, the base of the bottom plate of the shooter portion 6 is provided with a step having the same thickness as the lid plate portion 8 described later, so that the lower portion of the lid plate portion 8 described later can be fitted.

The lid plate portion 8 is a rectangular plate made of resin having the same thickness as the mold 2, and is formed to have a larger vertical and horizontal length than the internal opening 40 of the frame plate portion 4. For example, if the internal opening 40 is 180 mm × 220 mm, the lid plate portion 8 is 190 mm × 230 mm. The lid plate portion 8 is preferably formed of a transparent synthetic resin (for example, made of acrylic) so that the inside of the mold 2 can be seen at the time of placing concrete later.

The lid plate portion 8 is installed after the concrete has been placed up to the vicinity of the height at which the concrete placing structure 1 is installed. Specifically, the lower portion of the lid plate portion 8 is sandwiched between the step at the base of the bottom plate of the shooter portion 6 and the frame plate portion 4, and the upper portion of the lid plate portion 8 is a fixing rod 7 pushed into the gap 53. It is sandwiched between the frame plate portion 4 and the frame plate portion 4.

(Usage procedure)
Next, the procedure for using the concrete placing structure 1 (concrete placing method) of this example will be described with reference to FIGS. 5 (a), 5 (b), 6 (a), and (b). The concrete placing method includes a step of providing a formwork opening 20 in the formwork 2, a step of inserting the frame plate portion 4 into the back side, a step of pushing the fixing rod 7 into the gap 53, and a step of placing concrete. And a step of arranging the lid plate portion.

First, the form 2 is provided with a rectangular form opening 20. Specifically, a rectangular hole is made in the plywood formwork 2 with a circular saw or the like.

Next, as shown in FIG. 5A, the upper edge 41 of the frame plate portion 4 is inserted into the back surface side of the mold 2 through the form opening 20, and then the lower edge 42 of the frame plate portion 4 is inserted. After moving it to the back side and inserting it into the back side of the mold 2, the whole is lowered and the mold 2 is fitted into the gap 54 of the hooking portion 5.

Then, since the center of gravity of the entire driving throwing device 3 is outside the formwork 2, the driving throwing device 3 tries to rotate outward with the gap 54 of the lower hooking portion 52 as the center of rotation. As a result, the upper portion of the frame plate portion 4 is pressed against the back surface side of the mold 2.

Next, as shown in FIG. 5B, the fixing rod 7 is pushed into the gap 53 from above, and both ends are fixed with nails or the like so as not to fall off due to vibration. By pushing the fixing rod 7 into the gap 53 in this way, the front surface of the frame plate portion 4 is pressed against the back surface of the formwork 2, and the casting loading device 3 is firmly fixed to the formwork 2.

Next, as shown in FIG. 6A, concrete is poured (cast) into the formwork 2 via the shooter portion 6. As described above, by using the concrete placing structure 1 of the present embodiment, the height at which the concrete falls is suppressed, so that the separation of the concrete is prevented.

Finally, as shown in FIG. 6B, when concrete is poured up to the vicinity of the height of the lower edge of the formwork opening 20, the lid plate 8 raises the internal opening 40 of the frame plate 4. Is blocked. In that case, the fixing rod 7 is temporarily removed, the lid plate portion 8 is installed, and then the fixing rod 7 is pushed in again to fix the lid plate portion 8. Further, when concrete is poured on the upper part, the inside can be seen through the transparent lid plate portion 8.

After that, when the formwork 2 is dismantled, the concrete placing structure 1 is also removed and dismantled. Since the concrete casting structure 1 of the present invention is made of steel, it can be reused as many times as necessary if it is thoroughly washed after use.

(effect)
Next, the effects of the concrete casting structure 1 of this embodiment will be listed and described.

(1) As described above, the concrete casting structure 1 of the present embodiment has a rectangular formwork opening 20 having an opening height H1 and an opening width W1 formed in the concrete formwork 2; and an opening height; A frame plate portion 4 having a frame height H2 higher than H1 and a frame width W2 substantially the same as the opening width W1 and arranged so as to abut on the inner surface of the mold 2. A hooking portion 5 attached to a plate portion 4 and hooked on a mold 2, which is attached to a hooking portion 5 extending to the outside of the mold 2 and a frame plate portion 4 or a hooking portion 5. It is provided with a shooter portion 6 for injecting concrete into the form 2 through the internal opening 40 of the frame plate portion 4, and a casting and charging device 3 integrally having. With such a configuration, the concrete placing device 3 can be easily fixed to the form 2 by hooking the hooking portion 5 on the form 2, so that the concrete placing structure 1 is extremely excellent in workability. It becomes.

Then, if the concrete placing structure 1 of the present embodiment is used, the height difference from the concrete driving surface can be suppressed, so that the separation of concrete can be prevented. Therefore, it is possible to construct a concrete structure having excellent quality. Although the constructed concrete structure has recesses corresponding to the thickness of the frame plate portion 4, the frame plate portion 4 is formed extremely thin, so that the appearance is not impaired.

(2) Further, the hooking portion 5 of the casting loading device 3 is hooked on the upper hooking portion 51 which is hooked on the upper edge of the formwork opening 20 and the lower portion which is hooked on the lower edge of the mold opening 20. It is preferable that it is composed of the hooking portion 52 and is arranged on both the left and right sides of the frame plate portion 4. With such a configuration, the casting loading device 3 can be arranged in the formwork opening 20 very easily.

(3) Further, the upper hooking portion 51 of the casting loading device 3 extends diagonally upward in the direction away from the formwork 2 to form a V-shaped gap 53 with the formwork 2. At the same time, it is preferable to further include a fixing rod 7 which is pushed into the V-shaped gap 53 from above and pushes the frame plate portion 4 toward the inner surface of the mold 2. With this configuration, the casting loading device 3 can be easily pressed against the form 2 to be integrated and fixed.

(4) Further, by further providing the lid plate portion 8 for closing the internal opening 40 of the frame plate portion 4, the formwork opening 20 (4) can be used even when concrete is placed above the concrete placing structure 1. Leakage of concrete from the internal opening 40) can be prevented. In addition, the constructed concrete only has thin recesses, which is preferable in terms of strength and appearance.

(5) Further, the fixing rod 7 is pushed to the outside of the lid plate portion 8 to push the lid plate portion 8 toward the outer surface of the mold 2, so that the lid plate portion 8 can be easily pressed. It can be firmly and indirectly fixed to the mold 2.

(6) Further, since the side edges of the frame plate portion 4 are bent, the left and right side edges are less likely to be caught when the casting device 3 is fitted into the formwork opening 20, which makes it smoother. The casting input device 3 can be installed.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes to the extent that the gist of the present invention is not deviated are included in the present invention. included.

1: Concrete casting structure 2: Formwork 20: Formwork opening 3: Casting loading device 4: Frame plate 40: Internal opening 41: Upper edge 42: Lower edge 4a: Side edge 5: Hooking part 51: Upper hooking part 52: Lower hooking part 53: Gap 54: Gap 6: Shooter part 7: Fixed rod 8: Lid plate part H1: Opening height H2: Frame height W1: Opening width W2: Frame width

Claims (6)

With a rectangular formwork opening having an opening height and opening width formed in a concrete formwork;
A frame plate portion having a frame height higher than the opening height and a frame width substantially the same as the opening width, which is arranged so as to abut on the inner surface of the mold.
A hooking portion attached to the frame plate portion and hooked on the mold, and a hooking portion extending to the outside of the mold.
A shooter portion that is attached to the frame plate portion or the hook portion and for pouring concrete into the formwork through the internal opening of the frame plate portion.
With a driving input device that has
The concrete casting structure is equipped with. The hooking portion of the casting loading device includes an upper hooking portion that is hooked on the upper edge of the formwork opening and a lower hooking portion that is hooked on the lower edge of the formwork opening. The concrete casting structure according to claim 1, which is arranged on the left and right sides of the frame plate portion. The upper hooking portion of the driving loading device extends diagonally upward in a direction away from the mold to form a V-shaped gap with the mold.
The concrete casting structure according to claim 2, further comprising a fixing rod that is pushed into the V-shaped gap from above and presses the frame plate portion toward the inner surface of the formwork. The concrete casting structure according to claim 3, further comprising a lid plate portion that closes the internal opening of the frame plate portion. The concrete casting structure according to claim 4, wherein the fixing rod is pushed to the outside of the lid plate portion to press the lid plate portion toward the outer surface of the formwork. The concrete casting structure according to any one of claims 1 to 5, wherein the side edge of the frame plate portion is bent.