WO2017169296A1 - Ready-mixed concrete manufacturing apparatus or transporting apparatus and method for controlling same - Google Patents

Abstract

Provided is a manufacturing apparatus or a transporting apparatus capable of satisfactorily manufacturing ready-mixed concrete. A concrete mixer truck (1) includes a mixing drum (20), a hydraulic motor (40), a hydraulic pump (50), an engine (60), a pressure sensor (70), and a control device (80). The hydraulic motor (40) is a two-speed type and rotates the mixing drum (20). The pressure sensor (70) detects a driving pressure of the hydraulic motor (40). When the pressure sensor (70) detects a pressure value less than or equal to a first pressure value, the control device (80) performs a first rotation step of driving the engine (60) at a first rotational speed while putting the hydraulic motor (40) into a second speed to rotate the mixing drum. In addition, when the pressure sensor (70) detects a pressure value greater than the first pressure value, the control device (80) performs a second rotation step of driving the engine (60) at a second rotational speed higher than the first rotational speed while putting the hydraulic motor (40) into a first speed to rotate the mixing drum.

Description

Ready-mixed concrete manufacturing apparatus or transport apparatus, and control method thereof

The present invention relates to a ready-mixed concrete manufacturing apparatus or transport apparatus, and a control method thereof.

Patent Document 1 discloses a conventional ready-mixed concrete transportation device. This ready-mixed concrete transportation apparatus includes a mixer drum and a hydraulic motor mounted on a vehicle body frame. The mixer drum is rotated by a hydraulic motor to knead the raw material of ready-mixed concrete and water. The raw material of ready mixed concrete is cement, aggregate, admixture and the like. The hydraulic motor is rotated by circulating hydraulic oil to and from a hydraulic pump. The hydraulic pump is usually driven to rotate by an engine. Thus, in this ready mixed concrete transport device, the hydraulic pump rotates according to the engine speed. For this reason, this ready-mixed concrete transport apparatus manufactures ready-mixed concrete by kneading the raw material of ready-mixed concrete and water charged into the mixer drum while controlling the rotational speed of the mixer drum by the rotational speed of the engine.

JP 2013-248859 A

However, the ready-mixed concrete transportation device of Patent Document 1 does not consider that the kneading state such as viscosity changes in the process of kneading while mixing the raw material of ready-mixed concrete and water into the mixer drum. For this reason, in this ready-mixed concrete transport device, the load on the hydraulic motor may change due to a change in the kneaded state of the ready-mixed concrete raw material and water, and the rotation of the mixer drum may vary. In addition, this ready mixed concrete transport device requires time and effort to properly rotate the mixer drum by adjusting the rotational speed of the engine in accordance with the kneading state of the ready mixed concrete raw material and water. Further, in order to increase the rotation speed of the mixer drum, this ready-mixed concrete transportation device has to increase the rotation speed of the engine. At this time, a lot of fuel is consumed and the noise is increased.

The present invention has been made in view of the above-described conventional circumstances, and should provide a ready-mixed concrete manufacturing apparatus or transport apparatus that can satisfactorily manufacture ready-mixed concrete and a control method thereof. It is an issue.

The ready mixed concrete manufacturing apparatus or transport apparatus of the present invention includes a mixer drum, a hydraulic motor, a hydraulic pump, a driving device, a pressure detection device, and a control device. The mixer drum kneads the raw material of ready-mixed concrete and water. The raw material of ready mixed concrete is cement, aggregate, admixture and the like. The hydraulic motor rotates the mixer drum. Further, the hydraulic motor has a variable discharge volume of hydraulic fluid. The hydraulic pump circulates hydraulic fluid to and from the hydraulic motor. The drive device rotates the hydraulic pump. The pressure detection device detects the driving pressure of the hydraulic motor. When the pressure value detected by the pressure detection device is equal to or less than the first pressure value, the control device drives the drive device at the first rotation speed while rotating the mixer drum while reducing the discharge capacity of the hydraulic motor. The process is executed. Further, when the pressure value detected by the pressure detection device is larger than the first pressure value, the control device drives the drive device at a second rotational speed higher than the first rotational speed while increasing the discharge capacity of the hydraulic motor. Then, the second rotation process for rotating the mixer drum is performed.

Further, the ready mixed concrete manufacturing apparatus or the transport apparatus control method of the present invention includes a hydraulic motor in which hydraulic fluid circulates and rotates with a hydraulic pump that is driven to rotate by a driving device, cement, aggregate, When mixing the ready-mixed concrete raw material and water by rotating the mixer drum into which the raw material of ready-mixed concrete such as an admixture and water are charged, the first rotating step and the second rotating step are provided. In the first rotation process, when the pressure detection device that detects the drive pressure of the hydraulic motor detects a pressure value equal to or lower than the first pressure value, the drive device is driven at the first rotational speed while reducing the discharge capacity of the hydraulic motor. And rotate the mixer drum. In the second rotation step, when the pressure detection device detects a pressure value larger than the first pressure value, the drive device is driven at a second rotational speed higher than the first rotational speed while increasing the discharge capacity of the hydraulic motor. Rotate the mixer drum.

When the pressure value detected by the pressure detector when the driving pressure of the hydraulic motor is stabilized is less than or equal to the first pressure value, the ready mixed concrete manufacturing apparatus or the transport apparatus control method and control method of the present invention If the discharge capacity of the motor is reduced and greater than the first pressure value, the discharge capacity of the hydraulic motor can be increased. Here, the fact that the driving pressure of the hydraulic motor is stable refers to a state where the driving pressure is within a set range for a certain time (the same applies hereinafter).

Moreover, the ready mixed concrete manufacturing apparatus or the transport apparatus and the control method of the present invention provide the second pressure value in which the pressure value detected by the pressure detection device is larger than the first pressure value when the first rotation process is performed. The drive device is driven at the first rotation speed until the above is reached, and when the pressure becomes equal to or higher than the second pressure value, the second rotation process can be executed.

Further, in the ready mixed concrete manufacturing apparatus or the transport apparatus, the first pressure value or the second pressure value may have a threshold value, respectively.

It is the schematic which shows the mixer truck of Embodiment 1. FIG. 1 is a system diagram of a mixer truck according to a first embodiment. It is a flowchart which shows the manufacturing process of the ready mixed concrete of Embodiment 1. FIG.

A first embodiment embodying a ready mixed concrete manufacturing apparatus or transport apparatus and a control method thereof according to the present invention will be described with reference to the drawings.
<Embodiment 1>
As shown in FIGS. 1 and 2, the ready mixed concrete transport device of Embodiment 1 includes a vehicle body 10, a mixer drum 20, a hopper 30, a chute 35, a hydraulic motor 40 that is a hydraulic motor, a hydraulic pressure The mixer vehicle 1 includes a hydraulic pump 50 that is a pump, an engine 60 that is a driving device, a pressure sensor 70 that is a pressure detection device, and a control device 80.

The vehicle body 10 includes a cabin 11, a mount 13, and an engine 60. The cabin 11 is provided on the front side of the vehicle body 10. The gantry 13 is provided on the vehicle body 10 behind the cabin 11. The engine 60 drives the vehicle body 10 and rotationally drives the hydraulic pump 50 as will be described later. The engine 60 is disposed below the cabin 11.

The mixer drum 20 has a drum body 21, a drive shaft 23, and two drum blades 25. The drum body 21 is cylindrical. The drum body 21 has an opening 27 having one end opened. Further, the drum body 21 is closed by a closing portion 29 at the other end in the back direction when viewed from one end. The mixer drum 20 rotates on the pedestal 13 in a forward tilt posture in which the opening 27 of the drum body 21 is positioned above the rear end of the vehicle body 10 and the opening 27 of the drum body 21 is lifted above the closing part 29. It is installed freely.

The drive shaft 23 is connected to the center of the closing portion 29 of the drum body 21 and extends outward from the drum body 21. The drive shaft 23 extends on the center line of the rotation shaft of the mixer drum 20. Each drum blade 25 is helically fixed along the inner wall surface of the drum body 21 with a predetermined interval. Each drum blade 25 rotates with the drum body 21.

The hopper 30 has an input port 31 that opens while spreading upward. The hopper 30 has a discharge port 33 having a lower end opened forward and downward. The hopper 30 has a discharge port 33 facing the center of the opening 27 of the drum body 21. The raw material of ready-mixed concrete and the like input from the input port 31 of the hopper 30 is input into the drum main body 21 from the opening 27 of the drum main body 21 through the discharge port 33 of the hopper 30.

The chute 35 has a semi-cylindrical shape and extends long with the inner surface facing upward. The base end of the chute 35 is disposed below the opening 27 of the drum body 21. The chute 35 is supported so that its distal end is rotatable in the horizontal and vertical directions with the base end as the center. The chute 35 can guide the ready mixed concrete discharged from the opening 27 of the drum body 21 to a desired position.

The hydraulic motor 40 is mounted on the gantry 13. The hydraulic motor 40 is connected to the drive shaft 23 of the mixer drum 20 via a speed reducer 37 as shown in FIGS. The hydraulic motor 40 is a two-speed type that can switch the discharge capacity of the hydraulic oil in two stages of large and small. The hydraulic motor 40 has a motor regulator 41 that switches the discharge capacity.

The hydraulic pump 50 is also mounted on the mount 13. The hydraulic pump 50 is connected to a power take-out shaft 61 of the engine 60. The hydraulic pump 50 and the hydraulic motor 40 each have two inflow and outflow ports for hydraulic oil. A hydraulic circuit that forms a closed circuit is configured by a flow path 51 that communicates the inflow and outflow ports of the hydraulic pump 50 and the hydraulic motor 40. Further, the hydraulic circuit can circulate the hydraulic oil in both directions by switching the supply and discharge directions of the hydraulic pump 50 and the hydraulic motor 40.

2, the engine 60 includes a throttle adjuster 63 that adjusts the output of the engine 60 and an engine rotation detection sensor 65 that detects the rotation speed of the engine 60.

The pressure sensor 70 is attached to the flow path 51 constituting the hydraulic circuit. The pressure sensor 70 detects the driving pressure of the hydraulic motor 40 when the mixer drum 20 is rotated forward. When the mixer truck 1 rotates the mixer drum 20 in the forward direction, the raw material and water of ready-mixed concrete kneaded in the drum body 21 move in the back direction from the opening 27 of the drum body 21.

Next, a manufacturing process of ready mixed concrete using the mixer truck 1 will be described.

First, prepare ready-mixed concrete raw materials according to the quantity and properties of ready-mixed concrete to be manufactured. Similarly, the amount of ready-mixed concrete to be manufactured and the amount of water corresponding to the properties flow into the drum body 21 from the opening 27 of the drum body 21 and are stored. Then, the engine 60 is started, the operating device 90 is operated to start the rotation of the mixer drum 20, and the ready-mixed concrete raw material is gradually introduced into the inlet 31 of the hopper 30, and the water in the drum body 21 is Knead together. At this time, the hydraulic motor 40 is in the first speed. Further, the control device 80 determines whether or not the engine 60 is in an idling state, and commands the hydraulic pump 50 to output a predetermined amount corresponding to the engine speed.

When the rotation speed of the mixer drum 20 reaches the set rotation speed, the pressure sensor 70 detects the drive pressure of the hydraulic motor 40 by the control device 80 as shown in FIG. 3 (step S1). When the driving pressure detected by the pressure sensor 70 is equal to or lower than the first pressure value, the control device 80 changes the hydraulic motor 40 from the first speed to the second speed (step S2). That is, the torque of the hydraulic motor 40 is reduced by reducing the discharge capacity of the hydraulic motor 40. Then, the control device 80 drives the engine 60 at the first rotational speed A (the rotational speed corresponding to rotating the mixer drum 20 at the second speed of the hydraulic motor 40 at a predetermined rotational speed) (step S3). Execute the rotation process. When the drive pressure (step S1) detected by the pressure sensor 70 is larger than the first pressure value, the control device 80 sets the hydraulic motor 40 to the first speed (step S6).

The first pressure value has an upper threshold value and a lower threshold value. For this reason, when the detected pressure of the pressure sensor 70 becomes equal to or lower than the lower threshold value of the first pressure value in step S1, it is determined that the detected pressure of the pressure sensor 70 is equal to or lower than the first pressure value. Is determined to be equal to or higher than the first pressure value (the same applies hereinafter).

During the first rotation process, when the raw material of the ready-mixed concrete charged into the drum body 21 from the charging port 31 of the hopper 30 increases, the kneading state of the raw material of the ready-mixed concrete and water changes. That is, since the viscosity increases, the torque required to rotate the mixer drum 20 increases and the driving pressure of the hydraulic motor 40 increases.

The drive pressure (step S4) of the hydraulic motor 40 detected by the pressure sensor 70 is smaller than the second pressure value due to a kneading state with a high water content and low viscosity, or a small amount of ready-mixed concrete manufactured. The first rotation process continues until a predetermined time (a kneading time predetermined according to the amount of ready-mixed concrete to be manufactured and its properties) has elapsed (step S5). Finally, when a predetermined amount of water is introduced into the drum body 21 and a predetermined time elapses (step S5) and the driving pressure of the hydraulic motor 40 is stabilized, kneading is completed and the pressure sensor 70 is moved to the hydraulic motor 40. Is detected (step S9).

Further, when the drive pressure (step S4) of the hydraulic motor 40 detected by the pressure sensor 70 during the first rotation process becomes equal to or higher than the second pressure value, the control device 80 sets the hydraulic motor 40 to the first speed (step S6). That is, the torque of the hydraulic motor 40 is increased by increasing the discharge capacity of the hydraulic motor 40. Then, the control device 80 increases the engine 60 to the second rotational speed B (the rotational speed corresponding to rotating the mixer drum 20 at the second speed of the hydraulic motor 40 at a predetermined rotational speed) (step S7), and the second Execute the rotation process.

The second pressure value has an upper threshold value and a lower threshold value. Therefore, in step 5, when the detected pressure of the pressure sensor 70 becomes equal to or lower than the lower threshold value of the second pressure value, it is determined that the detected pressure of the pressure sensor 70 is equal to or lower than the second pressure value. Is determined to be equal to or higher than the second pressure value (the same applies hereinafter).

The driving pressure of the hydraulic motor 40 detected by the pressure sensor 70 (step S1) until a predetermined time (a kneading time determined in advance depending on the amount of ready-mixed concrete to be manufactured and its properties) has passed (step S1). Is larger than the first pressure value (the upper threshold value of the first pressure value), steps S1 and S6 to S8 are repeated. Further, when the driving pressure (step S1) of the hydraulic motor 40 detected by the pressure sensor 70 becomes equal to or lower than the first pressure value (lower threshold value of the first pressure value), for example, when water is added during the kneading. The control device 80 rotates the mixer drum 20 in accordance with the drive pressure (kneading state) of the hydraulic motor 40 detected by the pressure sensor 70 as described above.

Finally, when a predetermined amount of water is introduced into the drum body 21 and a predetermined time elapses (step S8) and the driving pressure amount of the hydraulic motor 40 is stabilized, kneading is completed and the pressure sensor 70 is replaced with the hydraulic motor. 40 drive pressure is detected (step S9). When the driving pressure detected by the pressure sensor 70 is equal to or lower than the first pressure value (the lower threshold value of the first pressure value), the control device 80 sets the hydraulic motor 40 to the second speed (step S10). When the driving pressure detected by the pressure sensor 70 is larger than the first pressure value (the upper threshold value of the first pressure value), the control device 80 sets the hydraulic motor 40 to the first speed (step S11). And the control apparatus 80 returns the engine 60 to idling rotation (step S12), and stops the protrusion of hydraulic fluid from the hydraulic pump 50 (step S13). In this way, the mixer drum 20 completes the production of ready-mixed concrete.

As described above, the mixer vehicle 1 includes the mixer drum 20, the hydraulic motor 40, the hydraulic pump 50, the engine 60, the pressure sensor 70, and the control device 80. The mixer drum 20 kneads the raw material of ready-mixed concrete and water. The raw material of ready mixed concrete is cement, aggregate, admixture and the like. The hydraulic motor 40 rotates the mixer drum 20. The hydraulic motor 40 is a two-speed type that can switch the discharge capacity of the hydraulic oil in two stages of large and small. The hydraulic pump 50 circulates hydraulic oil with the hydraulic motor 40. The engine 60 drives the hydraulic pump 50 to rotate. The pressure sensor 70 detects the driving pressure of the hydraulic motor 40. When the pressure value detected by the pressure sensor 70 is equal to or lower than the first pressure value (the lower threshold value of the first pressure value), the control device 80 drives the engine 60 at the first rotational speed while setting the hydraulic motor 40 to the second speed. Then, the first rotation process for rotating the mixer drum 20 is performed. Further, when the pressure value detected by the pressure sensor 70 is greater than the first pressure value (the upper threshold value of the first pressure value), the control device 80 causes the engine 60 to move from the first rotation speed while the hydraulic motor 40 is set to the first speed. The second rotation step of rotating the mixer drum 20 by driving at a higher second rotation speed is executed.

Thus, the rotational load of the mixer drum 20 is small when the amount of water in the mixture of the raw material of ready-mixed concrete and water is high and the viscosity is low, or the amount of ready-mixed concrete produced is small. When the pressure value detected by the pressure sensor 70 is equal to or lower than the first pressure value (the lower threshold value of the first pressure value), the mixer vehicle 1 sets the engine 60 to the first rotational speed while setting the hydraulic motor 40 to the second speed. The first rotation step of rotating the mixer drum by driving is performed. In this first rotation process, even if the engine 60 is driven at a first rotation speed lower than the second rotation speed, the hydraulic motor 40 is at the second speed, so that the mixer car 1 rotates the mixer drum 20 at the maximum rotation. Can do. In the first rotation step, the engine 60 is driven at the first rotation speed lower than the second rotation speed. Therefore, the mixer vehicle 1 can reduce the consumption of fuel for driving the engine 60. And noise can be reduced.

Also, if the mixed amount of the ready-mixed concrete raw material and water is in a kneaded state where the amount of water is low and the viscosity is high, or the amount of ready-mixed concrete produced is large, the rotational load on the mixer drum 20 is large. When the pressure value detected by the pressure sensor 70 is larger than the first pressure value (the upper threshold value of the first pressure value), the mixer vehicle 1 causes the engine 60 to move from the first rotation speed while the hydraulic motor 40 is set to the first speed. A second rotation process for driving at a higher second rotation speed is performed. As a result, the mixer truck 1 can reliably rotate the mixer drum 20 and knead the ready-mixed concrete raw material and water even when the rotational load of the mixer drum 20 increases.

Therefore, the mixer truck 1 of Embodiment 1 can satisfactorily produce ready-mixed concrete.

Further, in this mixer vehicle 1, when the pressure value detected by the pressure sensor 70 when the driving pressure of the hydraulic motor 40 is stabilized is equal to or lower than the first pressure value (lower threshold value of the first pressure value), the hydraulic motor 40. Is set to the second speed, and if it is larger than the first pressure value (the upper threshold value of the first pressure value), the hydraulic motor 40 is set to the first speed. When a predetermined amount of water is introduced into the mixer drum 20 at the end of the kneading of the ready-mixed concrete raw material and water and the driving pressure of the hydraulic motor 40 is stabilized, the kneading of the ready-mixed concrete raw material and water is completed. It is considered a smelting state. For this reason, this mixer vehicle 1 makes the hydraulic motor 40 1st speed or 2nd speed according to the kneading | mixing state in which the drive pressure of the hydraulic motor 40 was stabilized and kneading was completed.

That is, when the kneading is completed, the viscosity of the ready-mixed concrete is low, or the amount of the ready-mixed concrete is small, and the pressure value detected by the pressure sensor 70 is the first pressure value (the lower side of the first pressure value). If it is equal to or lower than (threshold value), the mixer vehicle 1 rotates the mixer drum 20 with the hydraulic motor 40 set to the second speed without changing the rotation speed (first rotation speed or second rotation speed) of the engine 60. In addition, when the kneading is completed, the ready-mixed concrete has a high viscosity, or the amount of ready-mixed concrete is large, and the pressure value detected by the pressure sensor 70 is the first pressure value (the upper threshold of the first pressure value). ), The mixer vehicle 1 rotates the mixer drum 20 with the hydraulic motor 40 at the first speed without changing the rotational speed (first rotational speed or second rotational speed) of the engine 60. As described above, the mixer truck 1 can efficiently rotate the mixer drum 20 in accordance with the kneaded state of the ready-mixed concrete that has been kneaded.

Further, the mixer vehicle 1 is configured such that the pressure value detected by the pressure sensor 70 during execution of the first rotation step is greater than the first pressure value (the upper threshold value of the first pressure value). The engine 60 is driven at the first rotational speed until it becomes equal to or higher than the second pressure value (the upper threshold value of the second pressure value), and when it reaches the second pressure value (the upper threshold value of the second pressure value), the second rotation process is executed. When the raw material of ready-mixed concrete is additionally charged to the mixer drum 20 or the like, and the kneading state is high in viscosity, the rotational load on the mixer drum 20 increases. When the pressure value detected by the pressure sensor 70 becomes equal to or greater than the second pressure value (the upper threshold value of the first pressure value) greater than the first pressure value (the upper threshold value of the first pressure value), the mixer vehicle 1 Two rotation steps are performed. As a result, the mixer vehicle 1 can reliably rotate the mixer drum 20 in accordance with the rotational load of the mixer drum 20 and knead the raw material of ready-mixed concrete and water. Further, the mixer vehicle 1 can reduce the consumption of fuel for driving the engine 60 and can also reduce the noise.

Further, in this mixer vehicle 1, each of the first pressure value and the second pressure value has a threshold value. For this reason, when the pressure sensor 70 detects the first pressure value or the second pressure value, it has an upper threshold and a lower threshold for each of the first pressure value and the second pressure value. The influence of noise in the range below and below the lower threshold can be avoided. For this reason, the mixer vehicle 1 can suppress fluctuations in the rotational speed of the engine 60 and reduce fuel consumption.

The present invention is not limited to the first embodiment described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the first embodiment, although it is a mixer truck, it may be a ready mixed concrete manufacturing apparatus that does not have a vehicle body.
(2) In Embodiment 1, the engine that rotationally drives the hydraulic pump is also used as the engine that travels the vehicle body. However, the hydraulic pump may be rotationally driven by an engine other than the engine that travels the vehicle body. In this case, since the rotational speed of the engine that rotationally drives the hydraulic pump can be freely adjusted regardless of the traveling state of the vehicle body, ready-mixed concrete can be manufactured while the vehicle body is traveling.
(3) In the first embodiment, the hydraulic motor is of the second speed type, but the discharge capacity may be changed at the third speed or higher or steplessly.
(4) In the first embodiment, the hydraulic motor is set to the first speed or the second speed according to the pressure value detected by the pressure sensor when the predetermined time has elapsed and the driving pressure is stabilized. The operator may check the kneading state and manually switch the hydraulic motor.
(5) In the first embodiment, the hydraulic motor and hydraulic pump that use hydraulic oil as a driving fluid are provided. However, a hydraulic motor and hydraulic pump that use a fluid other than hydraulic oil as a driving fluid may be used.
(6) In the first embodiment, the drive pressure of the hydraulic motor detected by the pressure sensor is compared with the first pressure value in step S1, and compared with the second pressure value that is larger than the first pressure value in step S4. However, the pressure values compared in steps S1 and S4 may be the same pressure value.
(7) In the first embodiment, the first pressure value and the second pressure value have threshold values, but may not have threshold values.
(8) In the first embodiment, when the predetermined time has elapsed (step S5 or step S8), when the driving pressure of the hydraulic motor is stabilized and kneading is completed, the driving pressure of the hydraulic motor is detected and is equal to or less than the first pressure value. (Step S9), the drive pressure of the hydraulic motor is not detected, the hydraulic motor is set to the first speed, the engine is returned to idling rotation, the hydraulic oil is stopped from protruding from the hydraulic pump, and ready mixed The production of concrete may be completed.

20 ... mixer drum, 40 ... hydraulic motor (hydraulic motor), 50 ... hydraulic pump (hydraulic pump), 60 ... engine (driving device), 70 ... pressure sensor (pressure detecting device), 80 ... control device

Claims (7)

A mixer drum for kneading raw mixed concrete raw materials such as cement, aggregate, admixture and water;
Hydraulic fluid discharge capacity is variable, and a hydraulic motor for rotating the mixer drum;
A hydraulic pump for circulating hydraulic fluid to and from the hydraulic motor;
A driving device for rotationally driving the hydraulic pump;
A pressure detecting device for detecting a driving pressure of the hydraulic motor;
When the pressure value detected by the pressure detection device is equal to or lower than the first pressure value, the first rotation is performed to rotate the mixer drum by driving the driving device at a first rotational speed while reducing the discharge capacity of the hydraulic motor. When the process is executed and the pressure value is larger than the first pressure value, the mixer drum is rotated by driving the driving device at a second rotational speed higher than the first rotational speed while increasing the discharge capacity of the hydraulic motor. A control device for executing the second rotation step,
A ready-mixed concrete manufacturing apparatus or a transport apparatus. When the pressure value detected by the pressure detection device when the driving pressure is stable is equal to or less than the first pressure value, the control device reduces the discharge capacity of the hydraulic motor, The ready mixed concrete manufacturing apparatus or transport apparatus according to claim 1, wherein when it is large, the discharge capacity of the hydraulic motor is increased. The control device moves the first driving device until the pressure value detected by the pressure detection device when the first rotation process is performed becomes equal to or higher than a second pressure value larger than the first pressure value. The ready-mixed concrete manufacturing apparatus or transporting apparatus according to claim 1 or 2, wherein the second rotating step is executed when the rotational speed is driven and the pressure becomes equal to or higher than the second pressure value. 4. The ready-mixed concrete manufacturing apparatus or transport apparatus according to claim 1, wherein the first pressure value or the second pressure value has a threshold value. A hydraulic motor that rotates by circulating a hydraulic fluid between a hydraulic pump that is driven to rotate by a drive unit has a mixer drum in which raw mixed concrete materials such as cement, aggregate, and admixture and water are added. When rotating and kneading the ready-mixed concrete raw material and water,
When the pressure detecting device for detecting the driving pressure of the hydraulic motor detects a pressure value equal to or lower than the first pressure value, the driving device is driven at a first rotational speed while reducing the discharge capacity of the hydraulic motor. A first rotation step of rotating the mixer drum;
When the pressure detection device detects a pressure value larger than the first pressure value, the drive device is driven at a second rotational speed higher than the first rotational speed while increasing a discharge capacity of the hydraulic motor. A second rotation step of rotating the mixer drum;
A method for controlling a ready-mixed concrete manufacturing apparatus or a transport apparatus. If the pressure value detected by the pressure detection device when the driving pressure is stabilized is less than or equal to the first pressure value, the discharge capacity of the hydraulic motor is reduced. If the pressure value is greater than the first pressure value, the hydraulic motor is reduced. The method for controlling a ready-mixed concrete manufacturing apparatus or a transport apparatus according to claim 5, wherein the discharge capacity of the ready-mixed concrete is increased. The drive device is driven at the first rotational speed until the pressure value detected by the pressure detection device during execution of the first rotation step becomes equal to or greater than a second pressure value greater than the first pressure value. The method for controlling a ready-mixed concrete manufacturing apparatus or transport apparatus according to claim 5 or 6, wherein the second rotation step is executed when the pressure value becomes equal to or greater than the second pressure value.

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