JP3207048U - Concrete pump truck - Google Patents

Abstract

To provide a concrete pump car capable of placing ready-mixed concrete through a boom deployed forward even when a placement place exists in a narrow space such as a tunnel. A concrete pump vehicle (1) includes a boom device (20) that can be extended and bent, a transport pipe (52) along the boom device, a turning table (60) disposed above a front wheel that turns the boom device (20), and a transport. And a pumping device 40 that pumps the ready-mixed concrete through the pipe 52 and the like, and the swivel table 60 can be self-propelled with the boom device 20 protruding forward from the vehicle body 10. [Selection] Figure 2

Description

  The present invention relates to a concrete pump truck.

  There is a self-propelled concrete pump truck that pumps ready-mixed concrete to a desired place through pipes and hoses along the boom. As an example, there is known a concrete pump vehicle equipped with a boom that can be deployed to a driving place in front of the vehicle body, such as the concrete pump vehicle shown in FIG. In the concrete pump vehicle as described above, during traveling, the boom is refracted and stored in the rear part of the vehicle body, and when the vehicle body reaches the vicinity of the placement site, the concrete pump vehicle is stopped and the vehicle body is moved by the outrigger. After fixing to the ground, the boom is deployed forward of the vehicle.

JP 11-172919 A

  However, for example, when placing ready-mixed concrete in a narrow space such as in a tunnel, it is difficult to deploy the boom forward after stopping the concrete pump truck at the target position.

  An object of the present invention relates to a concrete pump car capable of placing ready-mixed concrete through a boom that is deployed forward even when a placement place exists in a narrow space such as a tunnel.

  A concrete pump vehicle according to the present invention includes a boom device that can be extended and bent, a swivel table that is disposed above a front wheel for turning the boom device, a pipe along the boom device, and ready-mixed concrete through the pipe. The swivel table is capable of self-propelling in a state where the boom device protrudes forward from the vehicle body.

  The concrete pump vehicle of the present invention can be self-propelled in a state where the boom device projects forward from the vehicle body. Therefore, for example, when placing ready-mixed concrete at a location away from the entrance in a narrow tunnel, the boom device is swung on the swivel table so that it projects in front of the vehicle body in advance, and in that state the concrete pump A car can enter the tunnel and drive to the place where it is placed. Therefore, even when a placement place exists in a narrow space such as a tunnel, ready-mixed concrete can be placed through the boom extended forward.

  Moreover, in this invention, it is preferable that the engine which is a power source for driving the said boom apparatus is installed back from the center of the position of the front wheel regarding the front-back direction and the position of a rear wheel. According to this, the center of gravity of the concrete pump truck is likely to be located rearward. Therefore, even if the concrete pump truck is self-propelled with the boom device protruding forward of the vehicle body, the possibility that the concrete pump truck tilts forward is reduced.

  In the present invention, it is preferable that no cabin is provided. According to this, even if it arrange | positions so that a boom apparatus may protrude to a vehicle main body front, a cabin does not prevent arrangement | positioning of a boom apparatus. Moreover, it becomes possible to reduce the weight by a cabin, and the weight of the front part of a concrete pump truck can be reduced. For this reason, the center of gravity of the concrete pump truck is more easily located rearward. Therefore, even if the concrete pump truck is self-propelled with the boom device protruding forward of the vehicle body, the possibility that the concrete pump truck tilts forward is reduced.

It is a side view of the concrete pump truck in one embodiment of the present invention. It is the side view which rotated the boom apparatus in FIG. 1 ahead by the turning table. It is the schematic plan view which made the outrigger of the concrete pump vehicle in FIG. 1 protrude. It is the schematic of a pumping apparatus. It is the schematic side view which extended and refracted the boom apparatus of the concrete pump truck in FIG.

  Hereinafter, a concrete pump truck 1 according to an embodiment of the present invention will be described with reference to FIGS. The concrete pump vehicle 1 is a four-wheel vehicle without a driver's seat, and is a device that pumps ready-mixed concrete and places the ready-mixed concrete at a desired location. The concrete pump truck 1 is assumed to be used for pumping low slump ready-mixed concrete. The concrete pump car 1 is not provided with a cabin (driver's seat), and instead, a wireless or wired remote controller (not shown) is provided. The operator causes the concrete pump truck 1 to travel through the remote controller.

  As shown in FIGS. 1 and 3, the concrete pump vehicle 1 includes front wheels 5 and 6, rear wheels 7 and 8, a vehicle main body 10, a boom device 20, a hopper 30, a pressure feeding device 40, and a turning table 60. The front wheels 5 and 6 and the rear wheels 7 and 8 are supported by the lower part of the vehicle body 10. The vehicle body 10 has a generally flat rectangular parallelepiped shape as a whole. An operation panel 11 having a switch or the like that can be operated by an operator is installed on the right side surface near the center in the front-rear direction of the vehicle body 10. The vehicle main body 10 supports an engine 16 that supplies driving force to each part of the concrete pump vehicle 1. The engine 16 is installed between the operation panel 11 and the rear wheel 7. The engine 16 operates by receiving fuel supplied from a fuel tank (not shown) and burning the fuel. The vehicle body 10 includes a hydraulic device (not shown). This hydraulic apparatus includes a hydraulic pump that operates by obtaining a driving force from the engine 16, and a flow path that supplies hydraulic oil from the hydraulic pump to each part of the concrete pump vehicle 1. Each device described below is driven by the hydraulic pressure supplied by the hydraulic device while the operation is controlled by the operation of the operator through the operation panel 11.

  Outriggers 12 to 15 are installed in the vehicle body 10. An outrigger 12 is disposed at the rear right end of the vehicle body 10, an outrigger 13 is disposed at the rear left end, an outrigger 14 is disposed at the front right end, and an outrigger 15 is disposed at the front left end. The leg portions 12b to 15b of the outriggers 12 to 15 each have a cylindrical shape and extend and contract in the vertical direction. As shown in FIG. 3, arm portions 12 a to 15 a extend horizontally from the upper end portions of the leg portions 12 b to 15 b. The arm portions 12a and 13a slide and move between a state in which the arm portions 12a and 13a are accommodated in the vehicle main body 10 and a state in which the arm portions 12a and 13a protrude from the side surfaces of the vehicle main body 10 in the left-right direction. The arm portion 14a slides and moves between a state in which the arm portion 14a is housed in the vehicle main body 10 and a state in which the arm portion 14a protrudes obliquely forward to the right from the front portion of the vehicle main body 10. The arm portion 15a slides and moves between a state in which the arm portion 15a is accommodated in the vehicle main body 10 and a state in which the arm portion 15a protrudes obliquely forward to the left from the front portion of the vehicle main body 10. When the concrete pump vehicle 1 is running, the arm portions 12a to 15a are accommodated in the vehicle body 10, and the leg portions 12b to 15b are shortened and separated from the ground. When it is necessary to securely fix the concrete pump vehicle 1 to the ground, such as when a boom device 20 to be described later is driven, the arm portions 12a to 15a of the outriggers 12 to 15 are projected from the vehicle body 10 and the leg portions. 12b to 15b are extended and grounded.

  A hopper 30 is installed at the rear of the vehicle body 10 as shown in FIG. As shown in FIG. 4, the hopper 30 has a box shape with an upper opening. Through holes 31 and 32 are formed in the front wall of the hopper 30, and through holes 33 are formed in the rear wall. On the upper surface of the hopper 30, a lid 34 having a large number of openings 35 that are opened in a lattice shape is provided for ensuring the safety of workers. The lid 34 is provided with a vibration unit. When ready-mixed concrete is supplied from above the lid portion 34, ready-mixed concrete is supplied into the hopper 30 through the opening 35. As described above, the concrete pump vehicle 1 is assumed to be used for pumping low-slump ready-mixed concrete. In the case of a low slump, there is a high possibility that the ready concrete is clogged in the opening 35 of the lid 34. On the other hand, when the vibration unit vibrates the lid portion 34, clogging of the ready concrete into the opening portion 35 is suppressed.

  The pressure feeding device 40 includes two hydraulic cylinders 41, a swing pipe 44, and a transport pipe 45. The two hydraulic cylinders 41 extend in the front-rear direction and are arranged side by side in the left-right direction. The hydraulic cylinder 41 has a cylindrical shape, and a concrete piston 42 is accommodated therein. One of the two hydraulic cylinders 41 is connected to the through hole 31 of the hopper 30 and the other is connected to the through hole 32. The swing pipe 44 is disposed in the hopper 30. One end of the swing pipe 44 is connected to one of the through holes 31 and 32, and the other end is connected to the through hole 33. The transport pipe 45 has a U-shaped cylindrical shape, one end is connected to the through hole 33, and the other end communicates with a transport pipe 52 described later. As the swing pipe 44 turns, it moves between the position of the solid line in FIG. 4 and the position of the two-dot chain line. The swing pipe 44 located at the solid line connects the left hydraulic cylinder 41 and the transport pipe 45. The swing pipe 44 located at the two-dot chain line connects the right hydraulic cylinder 41 and the transport pipe 45.

  The turning table 60 has a disk shape, and is installed on the upper surface of the vehicle body 10 above the front wheels 5 as shown in FIG. On the turning table 60, the boom device 20 is installed. The boom device 20 includes a first boom 22, a second boom 23, a third boom 24, and a boom support portion 25. The boom support portion 25 has a truncated pyramid shape and is arranged at the upper center of the turntable 60. The turning table 60 rotationally drives the boom support portion 25 around the rotation axis along the vertical direction. The upper end of the boom support portion 25 is one end of the first boom 22, the other end of the first boom 22 is one end of the second boom 23, and the other end of the second boom 23 is one end of the third boom 24. Are connected to each other so as to be rotatable about the connecting portion. A hydraulic cylinder is provided at each connection portion of the first boom 22, the second boom 23, the third boom 24, and the boom support portion 25 connected to each other. Each hydraulic cylinder is driven to extend or refract the first boom 22, the second boom 23, and the third boom 24. Thereby, the 1st boom 22, the 2nd boom 23, and the 3rd boom 24 are comprised so that three booms may be extended from the state refracted to Z shape until it follows a straight line. The 1st boom 22, the 2nd boom 23, and the 3rd boom 24 are stored in the upper part of vehicle body 10 in the state where it bent to Z type.

  As shown in FIGS. 1 and 2, the boom device 20 supports transport pipes 52 to 54 that transport ready-mixed concrete and a tip hose 55. Each of the transport pipes 52 to 54 and the tip hose 55 are formed in a cylindrical shape. The transport pipe 52 is along the first boom 22, the transport pipe 53 is along the second boom 23, and the transport pipe 54 is along the third boom 24. The transport pipes 52 to 54 are connected to each other in the vicinity of the connection part between the booms. When the two booms rotate with respect to each other about the connecting portion, the two corresponding transport pipes also rotate with respect to each other about the connecting portion. Thereby, even if the boom apparatus 20 bends or extends, the connection state of the transport pipes 52 to 55 is maintained. The tip hose 55 is connected to the end of the transport pipe 54 opposite to the end connected to the transport pipe 53. Further, the end of the transport pipe 45 opposite to the side connected to the through hole 33 is connected to the end of the transport pipe 52 opposite to the side connected to the transport pipe 53. The ready-mixed concrete in the hopper 30 is pumped to the tip hose 55 through the transport pipe 45, transport pipe 52, transport pipe 53, and transport pipe 54, and flows out from the tip portion of the tip hose 55.

  Hereinafter, the usage method of the concrete pump truck 1 is demonstrated using FIGS. First, the operator operates the remote controller to cause the concrete pump vehicle 1 in a state where the first booms 22 to 24 as shown in FIG. Next, the operation panel 11 is operated, the turning table 60 is rotated 180 degrees, and the boom device 20 is projected forward of the vehicle body 10 as shown in FIG. Then, in this state, the concrete pump car 1 enters the tunnel, and self-travels to the placement place in the tunnel.

  Next, as shown in FIG. 3, the arm portions 12 a to 15 a of the outriggers 12 to 15 are slid and the leg portions 12 b to 15 b are extended to be grounded. Thereby, the concrete pump truck 1 is reliably fixed to the ground. Next, as shown in FIG. 5, the first boom 22, the second boom 23, and the third boom 24 are extended so that the tip hose 55 reaches the placement site.

  Next, ready-mixed concrete is supplied to the lid portion 34 of the hopper 30. Of the two hydraulic cylinders 41, the concrete piston 42 is moved forward in the direction not connected to the swing pipe 44. On the other hand, the concrete piston 42 is moved backward in the direction of the two hydraulic cylinders 41 connected to the swing pipe 44. At this time, in the former hydraulic cylinder 41, ready-mixed concrete is drawn into the hydraulic cylinder 41 through the through holes 31 or 32 according to the movement of the concrete piston 42. On the other hand, in the latter hydraulic cylinder 41, the ready-mixed concrete is pumped from the hydraulic cylinder 41 into the swing pipe 44 through the through holes 31 or 32 according to the movement of the concrete piston 42. Thereafter, the swing pipe 44 turns and the hydraulic cylinder 41 connected to the swing pipe 44 and the hydraulic cylinder 41 not connected to the swing pipe 44 are changed. Then, the concrete piston 42 is moved in the two hydraulic cylinders 41 as described above. By repeating this, the ready-mixed concrete supplied to the hopper 30 is pumped to the tip hose 55 through the swing pipe 44 and the transport pipes 45 and 52 to 54. Then, the ready-mixed concrete flows out from the tip hose 55 toward the placement site toward the front of the vehicle body 10.

  In addition, the concrete pump vehicle 1 is provided with a switch for urgently stopping the engine 16. By operating this switch, the engine 16 stops. Therefore, the running of the concrete pump truck 1 and the operation of each part provided in the concrete pump truck 1 are stopped. Further, a prevention fence is provided on the side surface of the concrete pump car 1 to prevent an operator working around the vehicle body 10 from being caught.

  According to the present embodiment, the boom device 20 can be self-propelled with the boom device 20 projecting forward from the vehicle body 10. For example, as shown in FIG. 2, even when the boom device 20 is projected straight from the vehicle main body 10, the rear wheels 7 and 8 are not lifted due to forward tilt, and the grounded state can be maintained. Therefore, it is possible to advance the concrete pump truck 1 in this state. Therefore, for example, when placing ready-mixed concrete at a location away from the entrance in a narrow tunnel, the boom device 20 is swung on the swivel table 60 in advance so as to protrude forward of the vehicle body 10, You can enter the tunnel in the state and make it self-propelled to the placement site. Therefore, even when a placement place exists in a narrow space such as a tunnel, the ready-mixed concrete can be placed through the boom device 20 extended forward.

  Moreover, since the engine 16 which is a power source for driving the boom device 20 is installed between the operation panel 11 and the rear wheel 7, the center of gravity of the concrete pump vehicle 1 is easily located rearward. Therefore, even if the concrete pump truck 1 is self-propelled with the boom device 20 protruding forward of the vehicle body 10 as described above, the concrete pump truck 1 is less likely to tilt forward. Furthermore, since the cabin is not provided in the concrete pump vehicle 1, even if it arrange | positions so that the boom apparatus 20 may protrude ahead of the vehicle main body 10, a cabin does not prevent arrangement | positioning of the boom apparatus 20. FIG. Moreover, it becomes possible to reduce the weight by a cabin and the weight of the front part of the concrete pump truck 1 can be reduced. For this reason, the center of gravity of the concrete pump truck is more easily located rearward. Therefore, even if the concrete pump truck 1 self-runs with the boom device 20 protruding forward of the vehicle body 10, the concrete pump truck 1 is less likely to tilt forward.

(Modification)
The above is a description of a preferred embodiment of the present invention, but the present invention is not limited to the above-described embodiment, and various modifications are possible within the scope described in the means for solving the problem. It is possible. Hereinafter, modified examples according to the above-described embodiment will be described. In addition, the same reference numerals as those described above are used for portions common to the above-described embodiment, and description thereof is omitted as appropriate.

  In the above-described embodiment, each device is operated and controlled using the operation panel 11. However, it may be activated and controlled by a wireless or wired remote controller.

  In the above-described embodiment, the engine 16 is installed between the operation panel 11 and the rear wheel 7 in the front-rear direction. However, the engine 16 only needs to be installed behind the center of the front wheel 5 and the rear wheel 7. For example, the engine 16 may be installed above the rear wheel 7.

DESCRIPTION OF SYMBOLS 1 Concrete pump vehicle 10 Vehicle main body 20 Boom apparatus 40 Pressure feeding apparatus 52, 53, 54 Transport pipe 60 Turning table

Claims (3)

A boom device that can be extended and bent, and
A turning table disposed above the front wheel for turning the boom device;
A tube along the boom device;
A pumping device for pumping ready-mixed concrete through the pipe,
A concrete pump car characterized in that the turning table is capable of self-propelled in a state where the boom device projects forward from the vehicle body.   The concrete pump vehicle according to claim 1, wherein an engine that is a power source for driving the boom device is installed behind the center of the front wheel position and the rear wheel position in the front-rear direction. .   The concrete pump truck according to claim 1 or 2, wherein a cabin is not provided.

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