JP3188201B2 - Concrete pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete pump for pumping fluid ready-mixed concrete from a remote location to a site where concrete is poured, such as a construction site or a construction site.

[0002]

2. Description of the Related Art Conventionally, a concrete pump 50 of this type has been used.
As shown in FIG. 4, fluid ready-mixed concrete A
And a pair of left and right cylinders 53 and 54 communicating with the inside from one side wall 52 of the hopper 51 for suction and discharge, and an opening at one end is arranged on the cylinder 53 and 54 side. The other end side is hopper 51
Swinging tube 57 swingably supported on the other side wall 56 side
And a driving device (not shown) for swinging the swinging tube 57, and a configuration in which the other end of the swinging tube 57 is connected to a feeding tube (not shown) connected to the driving site. Have been.

In this concrete pump 50, first, as shown in FIG. 4, the ready-mixed concrete A in the hopper 51 is sucked by a cylinder 54 not communicated with the rocking pipe 57, and then the rocking pipe 57 is rocked. Then, the cylinder 54 is operated to discharge the sucked ready-mixed concrete A. Simultaneously with this discharge, the ready-mixed concrete A in the hopper 51 is sucked by the cylinder 53 not communicated with the rocking pipe 57,
7 is oscillated to communicate with the cylinder 53, and the cylinder 53 is operated to discharge the sucked ready-mixed concrete A. At the same time as the discharge, the cylinder 54 not connected to the oscillating pipe 57 is used to discharge the fresh concrete A. Fresh concrete A is inhaled. By repeating the above operations sequentially, the ready-mixed concrete A in the hopper 51 is pumped to the driving site via the swing pipe 57 and the feed pipe.

As shown in FIGS. 5 to 7, a hopper 51 similar to the above is provided for the concrete pump 50.
And a pair of cylinders 53, 54 and a swinging pipe 57. Further, discharge ports 61, 62, which are one-end openings, are arranged on the cylinder 53, 54 side, and suction ports 63, 64 at the other end are inside the hopper 51. The swing tube 5 is opened upward at
A pair of guide tubes 6 provided integrally on the left and right of
5 and 66, a state in which the swing pipe 57 is communicated with the cylinder 53 and the guide pipe 66 is communicated with the cylinder 54, and a state in which the swing pipe 57 is communicated with the cylinder 54 and the guide pipe 65 is communicated with the cylinder 53. , Rocking tube 5
There is a concrete pump 68 provided with a driving device 67 for swinging the guide tube 7 and a pair of guide tubes 65 and 66 (see Japanese Utility Model Publication No. 63-47662). In this concrete pump 68, the cylinders 53 and 54 that perform suction are communicated with the guide pipes 65 and 66 that open upward in the hopper 51, so that the suction of the fresh concrete A into the cylinders 53 and 54 is performed more smoothly. It can be performed reliably.

[0005]

However, in particular, the concrete pump 6 having the guide pipes 65 and 66 described above.
8, cylinders 53, 5 of ready-mixed concrete A during operation
4 can be smoothly and reliably performed, but since the suction ports 63 and 64 face upward, the final residual ready-mixed concrete A in the hopper 51 at the end of the operation increases. As a result, there is a problem that, of course, wasteful fresh concrete A is increased, and more time and labor are required for cleaning, and there is room for further improvement in these points. . Therefore, an object of the present invention is to reduce the final residual ready-mixed concrete in the hopper at the end of operation,
An object of the present invention is to provide a concrete pump capable of reducing wasteful fresh concrete and reducing labor and time for cleaning.

[0006]

In order to achieve the above object, a concrete pump according to the first aspect of the present invention has a hopper into which ready-mixed concrete is charged, and is inwardly communicated from one side wall of the hopper. A pair of left and right cylinders that perform suction and discharge, a swing tube whose other end is swingably supported by a hopper with one end opening provided on the cylinder side, and a one end opening provided on the cylinder side. A pair of guide tubes are provided on the left and right sides of the oscillating tube integrally with the oscillating tube in a state where the suction port at the other end is opened upward in the hopper. The swing tube and the pair of guide tubes are swung into a state where the guide tube is communicated with the other cylinder, and a state where the swing tube is communicated with the other cylinder and the other guide tube is communicated with the one cylinder. Movement A lower guide tube connected to each of the pair of guide tubes, the lower guide tube having a lower opening that opens downward, and the suction port of each of the pair of guide tubes. Opening and closing means for opening and closing.
Thus, by opening and closing the respective suction ports of the pair of guide tubes by the opening / closing means to alternately suction and discharge the pair of cylinders in the same manner as in the related art, the ready-mixed concrete in the hopper is sucked into each of the guide tubes. Inhaled from the mouth and pumped to the driving site, for example, when the ready-mixed concrete in the hopper is reduced to a state where it is difficult to inhale by the guide tube, each intake port of the pair of guide tubes is closed by the opening / closing means. . Then, the alternate suction and discharge of the pair of cylinders and the swing of the swing tube therebetween are performed again. That is, when suction is performed by one of the cylinders that is not communicated with the rocking pipe, the one of the guide pipes that is connected to the cylinder is connected to the lower guide pipe that opens downward and the ready-mixed concrete at the lower part of the hopper. Inhalation. Then, the rocking tube is rocked to communicate with the one cylinder, and then the one cylinder is operated to discharge the sucked ready-mixed concrete. When suction is performed by the other cylinder not connected to the swing tube at the same time as the discharge, the other guide tube connected to the other cylinder has a lower opening having a lower opening connected to the other guide tube. The ready-mixed concrete at the lower part of the hopper is sucked through the guide tube. By repeating the above operations sequentially, the ready-mixed concrete remaining on the bottom side in the hopper is driven in through a rocking tube and driven into the site.

A concrete pump according to a second aspect of the present invention is the concrete pump according to the first aspect, wherein the opening / closing means includes:
It is characterized in that the caps are detachable caps at the respective suction ports of the pair of guide tubes. in this way,
Since the opening / closing means is a cap which is detachably attached to the suction port of the guide tube, the opening / closing means can be realized with a simple and inexpensive configuration.

[0008] The concrete pump according to claim 3 of the present invention relates to the concrete pump according to claim 1 or 2, wherein the lower opening of the lower guide tube is closer to the guide tube connected as the distance from the swing tube increases. Inclined to
The bottom of the hopper has an arcuate shape substantially along the turning locus of the lower opening of the lower guide tube when the drive means swings. Thereby, the lower opening of the lower guide tube and the bottom of the hopper can be brought closer to each other.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
This will be described below with reference to FIG. In the figure, reference numeral 11 denotes a concrete pump according to the present embodiment. The concrete pump 11 has an upper opening type hopper 12 into which fluid fresh concrete A is charged. This hopper 1
Reference numeral 2 denotes a pair of lower side walls 13 and 14 which are substantially half-moon-shaped and are parallel to each other along the vertical direction, and a bottom plate part which is formed in an arc shape so as to connect between lower end edges of these side walls 13 and 14. 15 and a pair of side walls 1 extending vertically upward from both ends of the bottom plate portion 15 and being parallel to each other.
6 and 17.

The concrete pump 11 has a pair of left and right cylinders 21 and 22 which are communicated by opening respective openings 19 and 20 from a predetermined position below the side wall 13 on one side of the hopper 12 to the inside of the hopper 12. , One end opening 24
The other end 25 is closer to the hopper 12 in a state where it can be selectively opposed to the two openings 19 and 20 of the cylinders 21 and 22.
Oscillating tube 26 oscillatingly supported by
Drive device (drive means) 28 for swinging the cylinders by a predetermined angle by pneumatic or hydraulic pressure, and discharge ports 30 and 31 which are one-end openings are provided with openings 19 and 2 of cylinders 21 and 22, respectively.
0 and are provided integrally with the left and right sides of the swing tube 26 so that the suction ports 32 and 33, which are the openings at the other ends, always open upward in the hopper 12. And a plurality of agitator paddles arranged in the hopper 12 and rotated by a driving device (not shown) to agitate the ready-mixed concrete A in the hopper 12. 37, 37,
…have.

The cylinders 21 and 22 are attached to the side wall 13 at an appropriate distance from each other and are parallel to each other, and are attached to the side wall 13 at a height corresponding to the swing of the swing tube 26. By retracting the internal piston 39 driven by the drive in the direction away from the hopper 12, the ready-mixed concrete A in the hopper 12 is sucked, and the internal piston 39 is advanced in the direction approaching the hopper 12 from this state. Thus, the ready-mixed concrete A is discharged.

The swinging tube 26 is curved so that the one end opening 24 and the other end opening 25 are offset in parallel with the center axis, and the other end opening 25 is connected to the cylinders 21 and
The support portion 3 fixed to the side wall 14 at a position higher than 2
8 rotatably supported. The other end opening 25 of the swinging tube 26 communicates with a feeding tube 40 which is connected to the support portion 38 and extends to the driving site. A connecting member 42 is provided on the other end opening 25 side of the swing tube 26 so that a swing shaft 41 disposed on the same straight line as the rotation center of the side wall 14 extends in the opposite side wall 13 direction. Has been fixed through. The swing shaft 41 is rotatably supported on the side wall 13 side and further projects outside the side wall 13, and the swing driving device 28 is connected to the projecting portion. Thus, the swing tube 26 is supported by the side wall 14 and also by the side wall 13.

The two guide tubes 34 and 35 have connecting pieces 44 and 45 projecting therefrom, respectively, fixed to a connecting member 42 for connecting the swinging tube 26 and the swinging shaft 41. In addition, the suction ports 32, 33 of the guide tubes 34, 35 have their respective central axes parallel to each other in the vertical plane and with respect to the plane including both the central axes of the openings 24, 25 at both ends of the swinging tube 26. They are provided so as to be parallel.

In this embodiment, the lower guide tube 4 is located at a predetermined intermediate position between the two guide tubes 34, 35.
7, 48 are connected and fixed so that the insides thereof communicate with each other. The lower openings 49, opposite to the connecting side of these lower guide tubes 47, 48 to both guide tubes 34, 35,
The reference numeral 50 is inclined so as to be closer to the guide tubes 34 and 35 connected as the distance from the swing tube 26 increases, and is always open downward regardless of the swing.

In this embodiment, the suction pipes 32 and 33 are fitted into the suction ports 32 and 33 of the guide pipes 34 and 35 to close the suction ports 32 and 33, and are detached from the suction ports 32 and 33 to remove them. Removable caps 52 and 53 for opening the suction ports 32 and 33 are provided for both the guide tubes 34 and 35, respectively.

Here, the rocking tube 2 is driven by the rocking drive device 28.
As shown in FIG. 1, when the cylinder 6 is pivoted to one pivot limit position, the pivot pipe 26 has one end opening 24 disposed opposite to the opening 19 of one cylinder 21 and
And one of the guide tubes 35 has its discharge port 31 opposed to the opening 20 of the other cylinder 22 so as to be in communication with the cylinder 22, and is further connected to the one guide tube 35. The lower opening 50 of the lower guide tube 48 is horizontally arranged so as to face the position at the bottom of the bottom plate 15 of the hopper 12.

On the other hand, the oscillating tube 26 is
Is swung to the other swing limit position, the swing tube 26
Has one end opening 24 facing the opening 20 of the other cylinder 22 to be in communication with the cylinder 22, and the other guide tube 34 has its discharge port 30 facing the opening 19 of the one cylinder 21. Arrange the cylinder 21
And the lower opening 49 of the lower guide tube 47 connected to the other guide tube 34 is horizontally arranged facing the lowest position of the bottom plate portion 15 of the hopper 12. Become. Further, the bottom plate portion 15 of the hopper 12
Is the lower guide tube 4 at the time of swinging by the swing driving device 28.
Outside the turning trajectories of the lower openings 49, 50 of 7, 48, they are arranged in an arc substantially along the turning trajectory.

A plurality of agitator paddles 37 are fixed radially to an agitator shaft 55 whose both ends are rotatably supported on the side walls 16 and 17 of the hopper 12. A chain sprocket 56 connected to a driving device (not shown) is fixed to one end of the agitator shaft 55 protruding outward from the hopper 12, and thus, the agitator paddles 37 and 3 are driven by the driving device.
,... Rotate in the hopper 12.

The concrete pump 1 having the above configuration
1 is a flowable ready-mixed concrete A in the hopper 12
Are rotated in a state in which the agitator paddles 37, 37,... Are present. Then, the swing drive device 28 swings the swing tube 26 to one swing limit position, for example. Then, the swinging tube 26 makes the one end opening 24 into the one cylinder 21.
Is placed in opposition to the opening 19, and communicates with the cylinder 21. One of the guide tubes 35 is connected to the discharge port 3 thereof.
1 is opposed to the opening 20 of the other cylinder 22 so as to be in communication with the cylinder 22, and the lower opening 50 of the lower guide tube 48 connected to the one guide tube 35 is connected to the bottom plate of the hopper 12. It is in a state of facing the position of the bottom of the portion 15. Then, in this state, the swing tube 26
Piston 39 of the other cylinder 22 not communicated with
Is retracted, the ready-mixed concrete A in the hopper 12 becomes
Most of the lower part is connected to the lower guide tube 48 via the suction port 33 of the guide tube 35 with the cap 53 not mounted.
Is sucked into the cylinder 22 through the lower opening 50 of the cylinder.

After that, the swing driving device 28 causes the swing tube 26
To the other swing limit position. Then, the swinging tube 26 makes the one end opening 24 the opening 2 of the other cylinder 22.
And the other guide tube 34 has its discharge port 30 opposed to the opening 19 of one of the cylinders 21 and is in communication with the cylinder 21. The other guide tube 34
The lower opening 49 of the lower guide tube 47 connected to the hopper 12 faces the bottommost position of the bottom plate 15 of the hopper 12. Then, in this state, when the piston 39 of the other cylinder 22 connected to the swinging pipe 26 is advanced, the ready-mixed concrete A in the cylinder 22 is discharged into the swinging pipe 26. When the piston 39 of one of the cylinders 21 that is not communicated with the swing pipe 26 is retracted at the same time as the discharge, the fresh concrete in the hopper 12 is almost completely sucked into the guide pipe 34 with the cap 52 not mounted. The remaining part is sucked into the cylinder 21 through the lower opening 49 of the lower guide tube 47 through the port 32.

Subsequently, the oscillating drive device 28 causes the oscillating tube 26
Is swung to one swing limit position to communicate with one cylinder 21. Thereafter, the piston 39 of the one cylinder 21 is moved forward to discharge the sucked ready-mixed concrete A, and at the same time as the discharge, the hopper 1 is moved by the other cylinder 22 not connected to the swinging pipe 26.
Fresh concrete A in 2 is inhaled in the same manner as above.
By repeating the above operations sequentially, the ready-mixed concrete A in the hopper 12 is pumped to the driving site via the swinging pipe 26 and the feed pipe 40.

Here, for example, when the ready-mixed concrete A in the hopper 12 is reduced to a state where it is difficult for the guide pipes 34 and 35 to inhale, the caps 52 and 33 are respectively inserted into the suction ports 32 and 33 of the guide pipes 34 and 35. 53 are fitted to make them closed. And again, a pair of cylinders 2
1, 22 alternate suction and discharge and swing tube 26 therebetween
Rocking. That is, for example, the swing tube 26 in a state of swinging to the one swing limit position has one end opening 24 disposed opposite to the opening 19 of the one cylinder 21 to be in communication with the cylinder 21, and One of the guide pipes 35 has its discharge port 31 opposed to the opening 20 of the other cylinder 22 so as to be in communication with the cylinder 22, and the lower part of the lower guide pipe 48 connected to the one guide pipe 35. It is assumed that the opening 50 is in a state of facing the position at the bottom of the bottom plate 15 of the hopper 12. Then, in this state, when the piston 39 of the other cylinder 22 that is not communicated with the oscillating tube 26 is retracted, the suction port 33 of the guide tube 35 is closed by the cap 53, so that the product in the hopper 12 is closed. Concrete A
Is sucked into the cylinder 22 from the lower opening 50 of the lower guide tube 48 via the lower guide tube 48 and a part of the guide tube 35.

Thereafter, the swing driving device 28 causes the swing tube 26
To the other swing limit position. Then, the swinging pipe 26 has one end opening 24 disposed opposite to the opening 20 of the other cylinder 22 to be in communication with the cylinder 22, and the other guide pipe 34 connects the discharge port 30 to the one cylinder 22. 21 and communicates with the cylinder 21 by being disposed opposite to the opening 19 of the other guide tube 3.
The lower opening 49 of the lower guide tube 47 connected to 4 is
The hopper 12 faces the bottom position of the bottom plate portion 15. Then, in this state, when the piston 39 of the other cylinder 22 connected to the swinging pipe 26 is advanced, the ready-mixed concrete A in the cylinder 22 is
It is discharged into. At the same time as the discharge, the piston 39 of one of the cylinders 21 that is not communicated with the oscillating tube 26 is retracted.
The fresh concrete A in the hopper 12 is sucked into the cylinder 21 from the lower opening 49 of the lower guide tube 47 via the lower guide tube 47 and a part of the guide tube 34 because the blocker is closed. .

Subsequently, the rocking drive device 28 causes the rocking tube 26
To one swing limit position, and
Communicate with 1. Thereafter, the piston 39 of the one cylinder 21 is advanced to discharge the sucked ready-mixed concrete A, and at the same time as the discharge, the hopper 12 is moved by the other cylinder 22 not communicated with the swing pipe 26.
The ready-mixed concrete A inside is sucked in the same manner as above. By repeating the above operations sequentially, the ready-mixed concrete A remaining on the bottom side of the hopper 12 is driven into the driving site via the swinging pipe 26 and the feed pipe 40.

According to the concrete pump 11 of this embodiment described above, the ready-mixed concrete A remaining on the bottom side of the hopper 12 is also sucked from the lower guide pipes 47 and 48 to swing the pipe 26 and the feed pipe. 40, it is possible to reduce the amount of the ready-mixed concrete A remaining in the hopper 12 at the end of the operation. Labor and time for the operation can be reduced. In addition, since the caps 52 and 53 that can be attached to and detached from the suction ports 32 and 33 are used to open and close the suction ports 32 and 33 of the guide tubes 34 and 35, a simple and inexpensive configuration can be realized.

Further, the lower openings 49, 50 of the lower guide tubes 47, 48 are inclined so as to be closer to the connected guide tubes 34, 35 as the distance from the swinging tube 26 increases. The part 15 includes a swing drive device 28
Opening 4 of lower guide tube 47, 48 at the time of swinging by
It is arranged outside the 9, 50 turning trajectories in an arc shape substantially along the turning trajectories. Thereby, the lower openings 49 and 50 of the lower guide tubes 47 and 48 and the bottom plate 15 of the hopper 12 can be brought closer to each other. Therefore, the final remaining ready-mixed concrete A in the hopper 12 at the end of the operation can be further reduced.
Wasteful ready-mixed concrete A can be further reduced, and labor and time for cleaning can be further reduced.

The suction ports 32 of the guide tubes 34, 35
As opening / closing means for opening / closing 33, a valve device for opening / closing suction ports 32, 33 can be attached to suction ports 32, 33, respectively. In this case, the valve device is always
Since the door can be opened and closed while being attached to the second and the third 33, it is not necessary to attach and detach like a cap, and it is possible to prevent the cap from being lost.

[0028]

As described in detail above, claim 1 of the present invention
According to the concrete pump described above, the ready-mixed concrete remaining on the bottom side of the hopper can also be sucked in from the lower guide pipe and pumped to the driving site via the swing pipe and the feed pipe. Therefore, the final remaining ready-mixed concrete in the hopper at the end of the operation can be reduced, so that useless ready-mixed concrete can be reduced, and labor and time for cleaning can be reduced.

According to the concrete pump of the second aspect of the present invention, since the opening / closing means is a cap which can be detachably attached to the suction port of the guide tube, the opening / closing means can be realized with a simple and inexpensive configuration.

According to the concrete pump of the third aspect of the present invention, since the lower opening of the lower guide tube and the bottom of the hopper can be made closer to each other, the final residual in the hopper at the end of operation. The amount of ready-mixed concrete can be further reduced, so that the amount of wasted ready-mixed concrete can be further reduced, and the labor and time for cleaning can be further reduced.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing one embodiment of a concrete pump according to the present invention.

FIG. 2 is a side sectional view showing one embodiment of the concrete pump of the present invention.

FIG. 3 is a perspective view showing a left guide pipe, a lower guide pipe, and a cap in FIG. 1 of the concrete pump according to one embodiment of the present invention.

FIG. 4 is a perspective view showing an example of a conventional concrete pump.

FIG. 5 is a front sectional view showing another example of the conventional concrete pump.

FIG. 6 is a side sectional view showing another example of a conventional concrete pump.

FIG. 7 is a rear view showing another example of the conventional concrete pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Concrete pump 12 Hopper 13 Side wall 21, 22 Cylinder 24 One end opening (of rocking tube) 25 Other end opening 26 Rocking tube 28 Rocking drive device (drive means) 30, 31 Discharge port (One end opening of guide tube) Part) 32, 33 Inlet 34, 35 Guide pipe 47, 48 Lower guide pipe 49, 50 Lower opening 52, 53 Cap (opening / closing means) A ready-mixed concrete

Claims (3)

(57) [Claims] 1. A hopper into which ready-mixed concrete is charged, a pair of left and right cylinders for inhaling and discharging, communicated inward from one side wall of the hopper, and one end opening portion is arranged on the cylinder side. A swing tube whose other end is swingably supported by a hopper; and a left and right side of the swing tube with one end opening disposed on the cylinder side and a suction opening at the other end opened upward in the hopper. A pair of guide tubes provided integrally therewith, a state in which the swing tube communicates with one cylinder and one guide tube communicates with the other cylinder, and a state in which the swing tube communicates with the other cylinder A driving means for oscillating the oscillating pipe and the pair of guide pipes so that the other guide pipe communicates with the one cylinder, and a concrete pump comprising: A concrete pump, comprising: a lower guide pipe having a lower opening that opens downwardly connected thereto; and an opening / closing unit that opens and closes the respective suction ports of the pair of guide pipes. 2. The concrete pump according to claim 1, wherein said opening / closing means is a cap which can be detachably attached to each of said suction ports of said pair of guide tubes. 3. The lower opening of the lower guide tube is inclined so as to be closer to the connected guide tube as the distance from the swing tube increases, and the bottom of the hopper is swung by the drive means. 3. The concrete pump according to claim 1, wherein the concrete pump has an arc shape substantially along a turning locus of a lower opening of the lower guide tube.