JP2000110352A - Concrete placing method and concrete placing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete placing method and a concrete placing mechanism for easily and compactly placing concrete even on the independent column of high story. SOLUTION: Concrete is flowed into a form 4 through a flexible pipe 22 whose inside diameter is six inches, a tapered pipe 23 whose upper end inside diameter is six inches and lower end inside diameter is four inches and ready mixed-concrete discharge piping 24 from a concrete hopper 21. When concrete is passed through the tapered pipe 23, an aggregate is uniformly dispersed since falling energy is relieved and agitated again, and since concrete flowing velocity is more gentle than the conventional, concrete is compactly placed. Furthermore, a piping connection part is one part of a connection part between the tapered pipe 23 and the ready mixed-concrete discharge piping 24, and since air is difficult to be dragged in from the piping connection part at the time when it passes in the piping, concrete is further compactly placed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete placing method and a concrete placing mechanism for easily and densely placing concrete even on an independent pillar having a high floor.

[0002]

2. Description of the Related Art When casting concrete, it is necessary to prevent the occurrence of bean boards (portions where only aggregates are solidified) and to compactly cast concrete by compacting using a vibrator. The usual concrete casting work was performed by attaching a 4-inch pipe to a concrete pump or attaching a sunny hose to a concrete hopper.

[0003]

However, when concrete is poured into a high column of independent columns in the above-mentioned conventional method, there is a possibility that the poured concrete is not sufficiently agitated to form a bean plate. When a sunny hose was used, air was sometimes trapped in the sunny hose. In this case, there is a possibility that pinholes may be generated in the applied concrete, and concrete may accumulate in the sunny hose, so that the sunny hose may be cut by the weight of the concrete. Also,
In the method using a concrete pump and 4-inch piping,
There are difficulties in operability and workability, and accordingly, there is a possibility that the quality of the independent columns may be reduced as well as the efficiency of placing concrete.

Further, in order to put ready-mixed concrete,
When a concrete hopper, which is a concrete storage unit, is put to rest by using a crane, a large number of auxiliary workers are required to prevent a load from being applied to a specific portion of the concrete hopper.

[0005] In view of the above circumstances, an object of the present invention is to provide a concrete placing method and a concrete placing mechanism for easily and densely placing concrete even on an independent pillar having a high floor. It is a further object of the present invention to provide a concrete placing mechanism having a concrete storage part with improved workability.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 comprises a pipe for discharging ready-mixed concrete, a tapered pipe at one end of a flexible pipe having a larger inner diameter than the pipe for discharging ready-mixed concrete. After connecting the other end of the flexible pipe to the concrete storage section, the ready-mixed concrete is transferred from the concrete storage section via the flexible pipe, the tapered pipe, and the ready-mixed concrete discharge pipe. It is a concrete casting method in which the concrete is poured into a predetermined place and poured.

Here, the flexible pipe is, for example, a rubber pipe or a well-known flexible pipe made of stainless steel. In addition, the ready-mixed concrete discharge pipe may be a known ready-mixed concrete discharge pipe. Further, the concrete storage unit is, for example, a concrete hopper or a concrete mixer truck that can be lifted by a crane.

According to the first aspect of the present invention, when the fresh concrete that has passed through the flexible pipe from the concrete storage unit passes through the tapered pipe, the falling energy is reduced and the concrete is stirred again. For this reason, the aggregate is evenly dispersed in the ready-mixed concrete, and the pouring speed of the ready-mixed concrete is slower than in the past, so that the concrete is poured densely. further,
Since the flexible pipe is used, the same pipe connecting portion as the conventional one becomes one of the connecting portions between the tapered pipe and the ready-mixed concrete discharge pipe, and when the ready-mixed concrete passes through the inside of the pipe, Becomes difficult to be involved. Therefore, the concrete is cast more densely.
Further, when the inner diameter of the flexible pipe is made larger than the pipe which has been conventionally used for concrete casting, the pipe is less likely to be blocked when the fresh concrete is poured.

The invention according to claim 2 provides a pipe for discharging ready-mixed concrete, a flexible pipe having a larger inner diameter than the pipe for discharging ready-mixed concrete, and having one end connected to a concrete storage part, and one end of the flexible pipe. And a taper pipe connecting the fresh concrete discharge pipe.

According to the second aspect of the present invention, a concrete placing mechanism for placing concrete can be manufactured by the method according to the first aspect.

According to a third aspect of the present invention, in the concrete placing mechanism of the second aspect, arcuate guides are respectively provided on two opposing side surfaces of a lower outer periphery, and a pipe can be connected to a lower end. A concrete storage unit having an outlet, and a vertical stability guide provided at a lower end of the concrete storage unit so as to be located below the arc-shaped guide are provided.

Here, the arc of the arc-shaped guide is 36.
The angle does not need to be 0 °, but may be about 90 °. Also,
The vertical stability guide is, for example, a substantially L-shaped frame.

According to the third aspect of the present invention, the arcuate shaped guide allows the ready-mixed concrete storage unit to be easily erected, and the vertical stability guide is provided. The load does not concentrate on the arc-shaped guide. Therefore, the concrete placing operation can be performed safely with a smaller number of people than before.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a concrete placing mechanism 2 according to a first embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram for explaining the whole image of the concrete placing mechanism 2 including the method of use, and FIG.
FIG. 3 is an enlarged view of a main part of the concrete placing mechanism 2, and FIG.
FIG. 3 is a diagram for explaining the structure of FIG.

First, the structure of the concrete placing mechanism 2 will be described.

As shown in FIG. 1, the concrete placing mechanism 2 includes a concrete hopper 21 for holding raw concrete, and a flexible pipe 22 connected to an openable and closable outlet 21d provided at the lower end of the concrete hopper 21.
And a tapered pipe 23 connected to the lower end of the flexible pipe 22 and a ready-mixed concrete discharge pipe 24 connected to the lower end of the tapered pipe 23.

As shown in FIG. 2, the concrete hopper 21 is a well-known concrete hopper used at a construction site. Have. Further, a plurality of folds are provided on the outer peripheral portion of the outlet 21d in order to prevent the flexible tube 22 from coming off easily.

The concrete hopper 21 is provided on two opposing side surfaces of the concrete hopper 21, respectively.
Guides 21a, 21a for protecting the joints 21b, 2
1b are provided so as to be fixed to each other. The shape of the lowermost side 21c of the guide 21a is a quarter circle so that the concrete hopper 21 can be easily lifted by a crane or the like. Furthermore, the lowermost sides 21c, 21
At the lowermost end of c, a substantially L-shaped vertical stabilizing guide 21e that stabilizes the concrete hopper 21 vertically when the concrete hopper 21 is erected using a crane or the like is provided.

The flexible pipe 22 is, for example, a rubber pipe having an inner diameter of 6 inches, and has a wall thickness enough to withstand the pressure caused by the concrete flowing inside. Also,
The connecting portion with the outlet 21d and the connecting portion with the tapered tube 23 are firmly fixed using the metal band 22a.

The taper tube 23 is, for example, a steel taper tube as shown in FIG.
For example, the outer diameter of the upper end is made slightly smaller than 6 inches so as to be connectable with the pipe 2, and the inner diameter of the lower end is made 4 inches so as to be connectable with the ready-mixed concrete discharge pipe 24.

The ready-mixed concrete discharge pipe 24 has an inner diameter of 4 mm.
It is a steel pipe for placing concrete of inch, and the same flange is provided at the upper end and the lower end, respectively, so that a plurality of steel pipes can be connected in series.

Next, the operation of the concrete placing mechanism 2 will be described.

As shown in FIG. 1, a concrete placing mechanism 2 is provided with a formwork 4 having a plurality of reinforcing bars 4a, 4a,.
Then, let's consider the case where independent concrete is made by pouring ready-mixed concrete.

First, a predetermined amount of ready-mixed concrete is received in the concrete hopper 21 having the outlet 21d closed.

Next, the lifting mechanism 3 is used to arrange the mold 4 directly above the formwork 4.

Next, the lifting mechanism 3 is operated to insert the concrete placing mechanism 2 into the form 4 until the lower end is located near the bottom of the form 4. Here, the guides 21a,
When a string (not shown) is attached to each of the members 21a, and the string is hung downward, and the worker near the formwork 4 operates the lifting mechanism 3 while pulling the string, the concrete placing mechanism 2 is stabilized without swinging left and right. It is inserted into the mold 4.

Next, the discharge port 21d is opened, and while the height of the concrete placing mechanism 1 is raised so that the lower end is located just above the top surface of the poured concrete, the ready-mixed concrete is poured into the formwork 4. Cast in.

Here, the inner diameter of the flexible pipe 22 is 6 inches, which is larger than the 4 inch pipe used for ordinary concrete casting. In addition, since the falling energy of the ready-mixed concrete is eased when passing through the tapered pipe 23 and the ready-mixed concrete is stirred again, the aggregate is evenly dispersed in the ready-mixed concrete, and the speed of pouring the ready-mixed concrete is moderate. As a result, concrete is cast in a solid manner. Furthermore, flexible pipe 2
2, the pipe connection similar to the conventional one is a connection point between the tapered pipe 23 and the ready-mixed concrete discharge pipe 24. When the ready-mixed concrete passes through the pipe,
It becomes difficult to entrain air from the pipe connection.

According to the method described above, the concrete hopper 2
After all of the ready-mixed concrete in 1 is poured, the lifting mechanism 3 is operated to lift the concrete placing mechanism 2 from the formwork 4.

Thereafter, the above-described operation is repeated until a predetermined amount of ready-mixed concrete is poured.

As described above, according to the concrete placing mechanism 2 of the embodiment of the present invention, the ready-mixed concrete is supplied from the concrete hopper 21 to the flexible pipe 22 having an inner diameter of 6 inches, and the upper end inner diameter is slightly smaller than 6 inches. After passing through a taper pipe 23 having an inner diameter of 4 inches and a ready-mixed concrete discharge pipe 24, it is poured into the mold 4. Therefore, since the inner diameter of the flexible pipe 22 is larger than the pipe used in the conventional casting of concrete, the pipe is less likely to be clogged when the fresh concrete is poured. The ready-mixed concrete that has passed through the flexible pipe 22 is
When passing through 3, the falling energy is reduced and the mixture is stirred again. For this reason, the aggregate is evenly dispersed in the ready-mixed concrete, and the speed of pouring the ready-mixed concrete is slower than in the past, so that the concrete is poured more densely. Further, since the flexible pipe 22 is used, the pipe connection part similar to the conventional one is one of the connection parts between the tapered pipe 23 and the ready-mixed concrete discharge pipe 24, and the ready-mixed concrete is connected to the pipe connection part when passing through the pipe. From the air. Therefore, the concrete is cast more densely.

The lowermost side 21 of the arc 21 of the guide 21a
Since the vertical stability guides 21e are provided at the lowermost ends of the c and 21c, when the concrete hopper 21 is laid down, the load does not concentrate on the lowermost sides 21c and 21c. Therefore, the concrete placing operation can be performed safely with a smaller number of people than before.

It should be noted that the present invention is not limited to the present embodiment, but can be arbitrarily modified without departing from the spirit of the invention. For example, the flexible tube 22 need not be made of rubber as long as it is bendable, and a well-known stainless steel flexible tube may be used. Further, the pipe diameters of the flexible pipe 22 and the ready-mixed concrete discharge pipe 24 need not be the same as those in the present embodiment, and it is sufficient that the diameter of the flexible pipe 22 is larger than the diameter of the ready-mixed concrete discharge pipe 24. Further, the number of connected fresh concrete discharge pipes 24 does not need to be one, and may be further increased when the formwork 4 is deep.

[0035]

According to the first aspect of the present invention, when the ready-mixed concrete that has passed through the flexible pipe from the concrete storage section passes through the tapered pipe, the falling energy is reduced and the fresh concrete is stirred again. For this reason,
The aggregate is evenly dispersed in the ready-mixed concrete, and the speed of pouring the ready-mixed concrete is slower than in the past, so that the concrete is densely poured. Further, since the flexible pipe is used, a pipe connection part similar to the conventional pipe connection becomes one place of a connection part between the tapered pipe and the ready-mixed concrete discharge pipe, and the ready-mixed concrete is connected to the pipe connection part when passing through the pipe. From the air. Therefore, the concrete is cast more densely. Also,
When the inner diameter of the flexible pipe is made larger than the pipe which has been conventionally used for concrete casting, the pipe is less likely to be clogged when the fresh concrete is poured.

According to the second aspect of the present invention, a concrete placing mechanism for placing concrete can be manufactured by the method according to the first aspect.

According to the third aspect of the present invention, the ready-mixed concrete storage section can be easily erected by the arc-shaped guide and the vertical stability guide is provided. The load does not concentrate on the arc-shaped guide. Therefore, the concrete placing operation can be performed safely with a smaller number of people than before.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an overall image of a concrete placing mechanism 2 according to a first embodiment of the present invention, including a method of use.

FIG. 2 is an enlarged view of a main part of the concrete placing mechanism 2.

FIG. 3 is a view for explaining in detail a structure of a tapered pipe 23 which is a component of the concrete placing mechanism 2;

[Explanation of symbols]

2 Concrete Casting Mechanism 3 Lifting Mechanism 4 Formwork 4a Reinforcing Bar 21 Concrete Hopper 21a Guide 21c Bottom Side (Arc Guide) 21e Vertical Stability Guide 22 Flexible Pipe 23 Tapered Pipe 24 Pipe for Fresh Concrete Discharge

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Yasuo Muto 1-20-10 Toranomon, Minato-ku, Tokyo Nishimatsu Building Co., Ltd.Tokyo Building Branch (72) Inventor Chimori Murata 1-20 Toranomon, Minato-ku, Tokyo No. 10 Nishimatsu Construction Tokyo Co., Ltd.

Claims (3)

[Claims] 1. A pipe for discharging ready-mixed concrete is connected to one end of a flexible pipe having a larger inner diameter than the pipe for discharging ready-mixed concrete using a tapered pipe, and the other end of the flexible pipe is connected to a concrete storage unit. A method for concrete placement, wherein fresh concrete is poured into a predetermined location from the concrete storage section and poured into the concrete storage section via the flexible pipe, the tapered pipe, and the ready-mixed concrete discharge pipe. 2. A pipe for discharging the ready-mixed concrete, a flexible pipe having a larger inner diameter than the pipe for discharging the ready-mixed concrete, and having one end connected to the concrete storage section, and connecting one end of the flexible pipe to the ready-mixed concrete discharging pipe. A concrete placing mechanism, comprising: 3. A concrete pouring mechanism according to claim 2, wherein the concrete storage section has arc-shaped guides on two opposing side surfaces of a lower end outer periphery, and has a discharge port connectable to a pipe at a lower end. And a vertical stability guide provided at a lower end of the concrete storage portion so as to be located below the arc-shaped guide.