JPH0317355A - Concrete placing device - Google Patents

Abstract

PURPOSE:To increase operational efficiency, by providing a rotatable concrete distributor having a boom to a middle mast of a tower crane and by guiding the delivery output of a conducting pipe to an aimed spot of concrete placement. CONSTITUTION:A concrete distributor 3 with a long boom 2 is rotatably provided to the fixed part 4 of the distributor of a middle mast 1. A concrete conducting pipe 8 is attached to be freely flexible via a swivel joint in the distributor 3 and the lower end thereof is connected to a concrete pump and also the delivery outlet 9c is forced to follow the movement of the boom 2. The delivery outlet 9c is turned and moved up and downward to the aimed spot for placing concrete to pump up the concrete from the concrete pump installed on the ground or the completed floor. In this way, the efficiency of concrete placement can be increased.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a concrete pouring device used for constructing buildings and other large-scale architectural structures made of reinforced concrete (RC) or steel reinforced concrete (SRC). In particular, the present invention relates to a device suitable for pouring concrete using the layered construction method.

(Prior art) Conventionally, when concrete is poured when constructing an RC or SRC building structure, for example around columns, concrete is poured into packets (3 to 6 bottles) from a ready-mixed concrete transport vehicle. Either the so-called Hackett method is used, in which the concrete packets are lifted up by a tower crane, etc., and transported directly to the pouring point for supply, or the ready-mixed concrete is first received in a receiving hopper, discharged into packets in the tower, and the packets are This is generally done using a one-sided elevator tower, etc., which uses power such as a winch to raise and lower the material within the tower and transfer it to a floor hopper, from where it is supplied and poured into the formwork at the desired casting location. Furthermore, regarding floor concrete, there is a method of laying the concrete 1/transport pipe connected to the concrete pump on the floor and using this above-floor piping to place the concrete while taking care not to disturb the floor reinforcement, and a method of pouring concrete using the floor hopper. Methods such as pouring using a wheelbarrow or shooter have been adopted.

(Problem to be Solved by the Invention) By the way, according to the above-mentioned packet method, since a crane is used, the number of days per cycle increases for the erecting process of the crane, and as a result, the construction process becomes longer. There was a problem. For example, in the case of concrete pouring around pillars, the packet capacity is 3 to 6 r as mentioned above.
n', the amount of pouring at one time tended to be large. For this reason, the formwork had to be designed to be strong and sturdy, and there were also problems such as opening and closing the hakento at the appropriate position above the formwork and erecting temporary scaffolding for this purpose.

Furthermore, according to Elevator Tower 2, if a dedicated elevator tower or the like is provided for concrete construction, there is a problem in that the cost of construction equipment increases accordingly, which increases the construction cost. Furthermore, if the above-floor piping method is adopted for floor concrete placement, above-floor piping must be installed for each floor, and when installing the above-floor piping, it must be done carefully so as not to disturb the floor reinforcement.
The work was difficult.

In any case, with conventional pouring methods and equipment, the preparation work takes too much time and effort.Especially when using the layered construction method, each layer is built up one after another, so the amount of effort and time required is due to the process. This was a factor that had a major impact on progress. SUMMARY OF THE INVENTION In order to solve these problems, it is an object of the present invention to provide an apparatus that utilizes a concrete distributor with a boom and is capable of extremely efficient concrete pouring work.

(Means for Solving the Problems) The features of the means taken by the present invention as a means to achieve the above-mentioned object are as follows. A concrete distributor is equipped with a swing device, and a concrete pump is connected to the concrete distributor via a concrete transport pipe, and the concrete pumped from this concrete bomb is pumped by swinging and lifting the boom. The purpose of this invention is to supply and place concrete by guiding the discharge port of the transport pipe of the concrete distributor to the target place.

Further, the concrete distributor equipped with the long boom has a structure in which the swing device and a climbing device for displacing the mounting height position along the intermediate mast of the tower crane are assembled.

(Function) As explained above, the concrete pouring device according to the present invention swivels and raises the discharge port of the transport pipe of the concrete distributor equipped with the long boom attached to the intermediate mast of the tower crane to the desired pouring location. At the same time, the concrete is pumped to the distribution station from a concrete pump installed on the ground or on the floor where assembly construction has been completed. This enables efficient supply and pouring of concrete.

In addition, since the installation height of the concrete distributor on the intermediate mast of the tower crane can be raised using a climbing device, the height can be adjusted as the layered construction method progresses. Concreting work can be performed efficiently and safely.

(Example) Further, the structure of the present invention will be specifically explained based on an example shown in the drawings. Figure 1 is a front view of a tower crane that is used for the layered construction method and is equipped with a concrete distributor 3 equipped with a long boom 2 in the intermediate mass l-1 of the tower crane, and Figure 2 is a front view of the tower crane used in the layered construction method. It is a line cross-sectional plan view.

First, the means for equipping the concrete distributor 3 with the long boom 2 to the intermediate mast 1 of the tower crane includes a distributor fixing part 4 fixed to the intermediate mast 1 by a support pin or support bolt, and a distributor fixing part 4 fixed to the intermediate mast 1 by a support pin or support bolt. It is supported by a distributor rotor 5 which rotates about the intermediate mast 1 as a rotation center.

In addition, the rotation operation of this distributor rotation unit 5 is as follows:
As shown in FIG. 3, a hydraulic motor 6 is linked to the distributor rotary section 5, and the hydraulic motor 6 is driven to enable appropriate turning in the left and right directions.

7 is a hydraulic pump unit connected to the hydraulic motor 6. In FIG. 4, the imaginary line shows a state in which the concrete distributor 3 is rotated by operating the hydraulic motor 6, and in this embodiment, the concrete distributor 3 can be rotated by 270 degrees.

Next, the concrete distributor 3 equipped with the long boom 2 is connected to the super joint 3 as shown in FIG.
a, 3b, 3c, 3d, . It has a concrete transport pipe 8 which is bendably connected via a pipe 3e. Although not shown in the drawing, the lower end 8a side of the concrete transport pipe 8 is connected to a concrete pump.

On the other hand, the upper end 8b side of the concrete transport pipe 8 is connected to the concrete transport pipe 9 assembled along the long boom 2 as shown in FIGS. 2 and 3, and the discharge port 9c of the transport pipe corresponding to the tip thereof is It is configured so that it can move by following the movement of the long boom 2. In this embodiment, the long boom 2 includes a so-called bendable long boom 2 that can be bent up and down. Therefore, as shown in FIG. 2, the concrete F46 conveying pipe 9 also uses a bendable concrete conveying pipe 9 which is connected to the intermediate portion through the shale joins 1 and 3f3g.

In addition to the above-mentioned vertical bending type, the long boom 2 includes a telescope type that can be expanded and contracted in the axial direction of the boom, and a type that can be bent horizontally, which can be selected depending on the conditions at the construction site. It is. In addition, as a means for vertically raising and lowering the long boom 2, that is, as a means for vertically moving the position of the concrete discharge port 9c in the concrete distributor 3, in the embodiment, as shown in FIGS. 3 and 4, , the piston rod 10a of a hydraulic operation cylinder 10 whose base end is pivotally supported on the side of the distribution rotation unit 5 is connected to the long boom 2 side, and by operating this hydraulic operation cylinder 10, the long boom 2 can be raised or lowered. It is designed to be easy to operate. The imaginary line in FIG. 3 shows the case where the long boom 2 is raised upward. Note that l1 is a bracket for attaching the long boom 2 to the distributor rotating section 5.

Note that the bending operation means of the long boom 2 itself is also a hydraulic operation cylinder 10 similar to the operation for raising and raising the long boom 2.
We are planning to do this by (see Figure 1).

Next, in accordance with the progress of the layered construction method, the height position of the concrete distributor 3 relative to the intermediate mast 1 of the tower crane is raised, and as a means for adjusting the height position, that is, as a climbing device, in this embodiment, An apparatus configured as shown in FIGS. 5(A) and 5(B) is used.

That is, an upper fixed frame 12 is attached to the intermediate mast 1 of the tower crane, a chain block 13 is suspended from the upper fixed frame 12, and the distributor rotating part supporting the concrete distributor 3 is connected to the chain block 13 by the chain block 13. 5 and the fixing part 4 are integrally suspended.

FIG. 5 (A) shows the state before the concrete distributor 3 is lifted, that is, before it is lifted up, and (B
) shows the state in which the support pin l4 for fixing and supporting the distributor rotating part 5 and the fixed part 4 to the intermediate mast 1 has been removed and lifted. In the embodiment, as described above, the chain block 13 was used for climbing, but it is of course possible to use the alignment device of the tower mast itself, which is equipped on the tower crane itself.

FIGS. 6(a), (b), and (c) show the operating procedure for lifting the concrete distributor 3 using a climbing device equipped on a tower crane.

First, the climbing device suspends a climbing hydraulic cylinder 16 from the outer periphery of the upper fixed frame 15 attached to the intermediate mast 1 of the tower crane, and moves the piston rod 16a of the climbing hydraulic cylinder 16 up and down along the intermediate mast 1. It is connected to a ring-shaped lower fixing frame 17. Further, a climbing link 18 is connected and suspended from the lower fixed frame 17.

Therefore, when the concrete distributor 3 is to be climbed, the climbing hydraulic cylinder L6 is extended or lowered to lower the lower fixed frame 17 along the intermediate mast l, as shown in FIG. 6(a). And the climbing link l suspended from the lower fixed frame l7
8 is connected to the distributor rotating section 5. In this state, the support pin 14 fixing the distributor 3 to the intermediate mast 1 is removed. In the removed state, the climbing hydraulic cylinder 16 is retracted.

FIG. 6(b) shows a state in which the distributor 3 is raised along the intermediate mast 1 by contracting the climbing hydraulic cylinder l6.

FIG. 6(C) shows a state in which the support bottle 14 previously removed in the raised state is inserted and the distributor 3 is fixed at a predetermined height position of the intermediate mass I-1. When the fixing work by inserting the support pin 14 is completed, the hydraulic cylinder 16 is extended and the climbing link l
8 to release the connection to the distributor rotating section 5.

Thereafter, the above operations are repeated to successively raise the height of the distributor 3 relative to the intermediate mast 1.

The above is the structure of the concrete placing apparatus according to the present invention.

Next, an outline of the procedure for supplying and placing concrete using this concrete placing device will be explained.

First, the concrete distributor 3 is installed on the intermediate mast 1 of the tower crane constructed by the layered construction method.
The discharge port 9c at the tip of the concrete transport pipe 9, which is piped along the long boom 2, is guided and placed at a place where concrete is to be placed, such as around the floor or where floor concrete is to be placed, by turning and raising/elevating operations. The concrete is then pumped using a concrete pump installed on the ground or on a floor that has already been assembled. The concrete being pumped is efficiently supplied to the pouring site via the distributor 3.

When the concrete construction work for a given layer is completed, the height position of the concrete distributor equipment is adjusted.

In other words, the concrete distributor is raised along the intermediate mast of the tower crane. Concrete construction work for each layer will be performed in the following manner as described above.

(Effects of the Invention) As explained above, the present invention equips a tower crane used in the layered construction method with a concrete distributor so that it can be climbed up, and the concrete distributor can be rotated. The structure is such that the concrete discharge port at the tip of the concrete transport pipe can be guided to the appropriate concrete placement location by elevating the pipe, resulting in the following effects.

(1) The first advantage is that the tower crane used in the layered construction method itself can be used as a support member for concrete distribution without impairing its function as a cargo handling machine, and can be used as a crane for lifting construction materials. It can be used as a device for concrete pouring work.

In other words, since the concrete distributor is installed on the intermediate mast of the tower crane so that it can swivel and be lifted up and down, the tower crane can be used as a cargo handling machine to lift materials necessary for construction in parallel with concrete pouring work. can. Therefore, efficient operation of the construction machinery used can be planned, contributing to shortening the overall construction period and reducing equipment costs.

(2) The second point is that concrete distribution is
As mentioned above, since the intermediate mast can be rotated up and down and is equipped with a boom, it is easy to guide it to the concrete pouring site. In other words, it is possible to supply concrete directly to the place where concrete is to be poured, whether around columns or floors, and it is possible to pour high quality concrete.

Furthermore, the time required for manpower and pouring is reduced, contributing to significant labor savings and improved safety in the entire work.

(3) The third point is that the concrete distributor is
Since it is equipped with a structure that allows it to climb up compared to a tower crane, it is possible to efficiently perform concrete pouring work according to the progress of the layered construction method. As described above, the concrete placing device according to the present invention has the following features:
Compared to the conventional packet method and one-way elevator tower method,
It is efficient, economical, and has an extremely useful configuration as a concrete pouring device that helps improve work safety.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view showing the device structure, FIG. 2 is a cross-sectional plan view taken along the line X--X of FIG.
Figure 3 is a front view of the concrete distributor attachment part to the intermediate mast of the tower crane, Figure 4 is its plan view, and Figures 5 (A) and (B) illustrate the mechanism of the climbing device of the concrete distributor. (A) shows the state before climbing, and (B) shows the state after climbing. Figure 6 (a
), (b), and (c) show the climbing conditions during concrete distribution using the climbing device installed on the tower crane. 1... Intermediate mast of tower crane 2... Long boom 3... Concrete distributor 3a, 3
b, 3c 3d, 3e, 3f, 3
g...Super joint 4...Distributor fixing part 5...Distributor rotation part 6...Yui pressure motor 7...Hydraulic pump unit 8, 9...Concrete transport pipe 9C...・Concrete discharge port 10...Hydraulic operation cylinder 10a...Piston rod l1...Bracket 12...Upper fixing frame 13
...Change opening 14...Support hinge 15...
Upper fixed frame l6... Climbing hydraulic cylinder 17... Lower fixed frame l8... Climbing link (A) (B) (0) (b) (C)

Claims (2)

[Claims] (1) The intermediate mast of the tower crane is equipped with a concrete distributor equipped with a boom incorporating a swing device, and a concrete pump is connected to the concrete distributor via a concrete transport pipe.
A concrete pouring device characterized in that the boom is rotated and raised and raised to guide a discharge port of a transport pipe of a concrete distributor to a target pouring location to supply and pour concrete. (2) A concrete placing device characterized in that the concrete distributor equipped with the boom is assembled with the swing device and a climbing device for displacing the mounting height position along the intermediate mast of the tower crane.