JP2017040062A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction machine which can support an energy-saved operation corresponding to an operation state of a vibrator.SOLUTION: A construction machine 1 has an engine 50, a hydraulic pump driven by the engine 50, and a motor driven by hydraulic pressure from the hydraulic pump. The construction machine also comprises: a plurality of vibrators which fasten a pavement material; a plurality of valves 70 which are arranged between the hydraulic pump and the vibrators; a valve control part 108 which changes opening amounts of a plurality of the valves 70 on the basis of an operation of an operator; a hydraulic pressure use rate calculation part 102 which calculates a hydraulic pressure use rate that is a ratio of the total sum of a product of a displacement volume of the motor and a rotational speed of the motor with respect to a product of a displacement volume of the hydraulic pump and a rotational speed of the engine 50; and a first display part 111 which displays the calculated hydraulic pressure use rate.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a construction machine.

Conventionally, in the slip form method, a road construction machine that performs an energy saving operation by reducing the rotation speed of an engine has been proposed (see Patent Document 1).
In the invention described in Patent Document 1, the recommended engine rotation speed for the pavement width and pavement thickness is determined in advance, and the road construction machine is operated at the recommended engine rotation speed.

JP 2012-162876 A

  However, the road construction machine described in Patent Document 1 only considers the pave width and pavement thickness when determining the engine speed, and changes the operating condition of the vibrator based on the viscosity of the pavement material, the inclination of the construction surface, and the like. The corresponding energy-saving operation cannot be performed.

  This invention is made | formed in view of an above described situation, and makes it a subject to provide the construction machine which can support the energy-saving driving | operation according to the operating condition of a vibrator.

  In order to solve the above-described problems, a construction machine according to the present invention includes an engine, a hydraulic pump driven by the engine, and a plurality of vibrators that have a motor driven by hydraulic pressure from the hydraulic pump, and compact a paving material. A plurality of valves provided between the hydraulic pump and the vibrator, an engine operation unit operated by an operator to change the rotation speed of the engine, and an opening amount of the plurality of valves is changed. A valve operating unit operated by an operator, and a hydraulic usage rate that is a ratio of a sum of a product of a displacement volume of the motor and a rotation speed of the motor to a product of a displacement volume of the hydraulic pump and a rotation speed of the engine. A hydraulic pressure usage rate calculation unit to calculate; and a display unit to display the calculated hydraulic pressure usage rate. .

  According to this configuration, since the hydraulic pressure usage rate of the vibrator is calculated and displayed, the hydraulic pressure usage rate can be grasped by the operator, and vibration is preferably applied by the vibrator, and the operator can save energy according to the operating condition of the vibrator. Driving can be favorably supported.

  The construction machine may include an engine control unit that increases a rotation speed of the engine when the hydraulic pressure utilization rate exceeds a predetermined value.

  According to this configuration, the engine rotation speed is controlled based on the hydraulic pressure usage rate, so that the energy saving operation of the construction machine can be performed more suitably.

  The display unit may be configured to display a load factor of the engine acquired from the engine control device.

  According to such a configuration, since the load factor of the engine is displayed, the load factor can be grasped by the operator, and energy saving operation by the operator can be favorably supported.

  The construction machine may include an engine control unit that increases a rotation speed of the engine when the load factor exceeds a predetermined value.

  According to such a configuration, since the engine rotation speed is controlled based on the load factor, the energy saving operation of the construction machine 1 can be performed more suitably.

  The construction machine is stored in a storage unit that stores a relationship between the rotation speed of the engine, a load factor, and a fuel consumption, a rated rotation speed of the engine, an actual load factor, and the storage unit. A fuel consumption amount calculation unit that calculates the fuel consumption amount at a rated rotation speed based on the relationship, and the display unit calculates the actual fuel consumption amount obtained from the engine control device and the calculated fuel consumption amount. Both the fuel consumption at the rated rotational speed, the difference between the actual fuel consumption obtained from the engine control device and the fuel consumption at the calculated rated rotational speed, and the calculated rated rotational speed. It is also possible to display at least one of the ratios of the actual fuel consumption acquired from the engine control device to the fuel consumption in FIG.

  According to such a configuration, energy saving operation by the operator can be supported more suitably.

  According to the present invention, it is possible to support energy-saving operation according to the operating state of the vibrator.

It is a perspective view which shows the construction machine which concerns on embodiment of this invention. 1 is a system diagram schematically showing a construction machine according to an embodiment of the present invention. 1 is a block diagram schematically showing a construction machine according to an embodiment of the present invention. It is a graph which shows the example of the relationship between an engine speed, a load factor, and fuel consumption. It is a figure which shows the example of a display of the start screen in a 1st display part. It is a figure which shows the example of a display of the construction setting screen in a 1st display part. It is a figure which shows the example of a display of the machine setting screen in a 1st display part. It is a figure which shows the example of a display of the numerical monitor screen in a 1st display part. It is a figure which shows the example of a display of the 1st construction screen in a 1st display part. It is a figure which shows the example of a display of the 2nd construction screen in a 1st display part. It is a figure which shows the example of a display of the 3rd construction screen in a 3rd display part.

  Embodiments of the present invention will be described in detail with reference to the drawings as appropriate. As shown in FIG. 1, the construction machine 1 according to the embodiment of the present invention continuously paves with the same cross section by compacting the pavement (raw concrete) supplied to the construction surface S while moving forward. It is used for the slip-form construction method.

  The construction machine 1 spreads and spreads a self-propelled vehicle main body 10 and a pavement material supplied to the construction surface S, and spreads and leveles the pavement material, and a plurality of vibrators 30 for compacting the pavement material. And a mold 40 that molds the paving material into a predetermined cross section. The pavement material is supplied between the molds 40 from a vehicle that travels ahead of the construction machine 1 (a so-called ready-mix vehicle).

<Vehicle body>
The vehicle body 10 includes a frame 11 and four crawler traveling bodies 12 on the front, rear, left, and right. A support column 12 a is vertically provided on the upper surface of each crawler traveling body 12. A traveling motor 13 is accommodated in the crawler traveling body 12 in order to cause the crawler traveling body 12 to travel. On the frame 11, a control table (not shown) is provided for an operator to get on and operate the construction machine 1. The control table is provided with a control unit 100 (see FIG. 3) for controlling the driving of the crawler traveling body 12, the spreader 20 and the vibrator 30, and the like.

  The frame 11 includes a pair of left and right first frames 11a extending in the front-rear direction, and a pair of front and rear second frames 11b spanning the left and right first frames 11a. Both front and rear end portions of the first frame 11a are attached to the columns 12a of the front and rear crawler traveling bodies 12. The frame 11 is supported at a predetermined height by front, rear, left and right crawler traveling bodies 12.

<Mold>
The mold 40 is a member that molds the paving material on the construction surface S into a predetermined cross section. The mold 40 includes a pair of left and right end plates 41 disposed between the left and right first frames 11 a and a screed 42 disposed between both end plates 41.

  The end plate 41 is a vertical plate that defines the width of the paving material. The end plate 41 extends in the front-rear direction, and the upper end edge is attached to the lower surfaces of the front and rear second frames 11b. The screed 42 is a welded structural member that regulates the height of the paving material and has an open top surface. The screed 42 extends in the left-right direction, and both left and right end portions are attached to the inner side surfaces of the left and right end plates 41. The lower surface of the screed 42 is arranged parallel to the construction surface S with a space therebetween.

<Laying leveling device>
The spread leveling device 20 is disposed below the frame 11 and includes two augers 21 that spread the pavement material supplied to the construction surface S to the left and right. The auger 21 includes a screw shaft 21a extending in the left-right direction and a helical screw blade 21b attached to the outer peripheral surface of the screw shaft 21a. The auger 21 is disposed in front of the screed 42, and both left and right end portions of the screw shaft 21a are rotatably supported by the left and right frames of the mold 40.

  An auger motor 22 (see FIG. 2) for rotating the auger 21 is housed in a screed 42 of a mold 40. The auger motor 22 is driven by a drive transmission mechanism (not shown) such as a chain or a belt. The driving force is transmitted to the screw shaft 21a.

<Vibrator>
The vibrator 30 is a device that imparts vibration to the pavement material spread on the construction surface S and compacts it. In the present embodiment, a plurality (16) of vibrators 30 are arranged in front of the auger 21, and the vibrators 30 are arranged at intervals in the left-right direction. The vibrator 30 includes a drive motor 31 (see FIG. 2) for generating vibration applied to the pavement material. The vibrator 30 can also operate as a tamper that vibrates on the pavement material and strikes and compacts the surface of the pavement material.

  As shown in FIG. 2, the construction machine 1 includes an engine 50 as a drive source, a plurality (six in this embodiment) of pumps 60, and a plurality (in this embodiment, four crawlers). Four driving motors 13 corresponding to the body, one or more (two in this embodiment corresponding to two augers) auger motors 22, and a plurality (16 in this embodiment). Drive motor 31 and a plurality of (in the present embodiment, 16 valves 70 corresponding to the drive motor 31) valves 70 are provided. The traveling motor 13, the auger motor 22, and the driving motor 31 are hydraulic motors.

<Engine and pump>
The engine 50 and the plurality of pumps 60 are provided in the vehicle main body 10 (see FIG. 1). The plurality of pumps 60 are hydraulic pumps that are operated by the driving force of the engine 50, pump up hydraulic oil stored in a tank (not shown), and supply the hydraulic oil to each motor corresponding to the pump 60 via a circuit.

  The first pump 60 supplies hydraulic oil to the four traveling motors 13. The traveling motor 13 is rotated by the supplied hydraulic oil and causes the crawler traveling body 12 to travel at a speed corresponding to the hydraulic pressure of the hydraulic oil. The hydraulic oil supplied to the traveling motor 13 is returned to the tank via a circuit (not shown). A circuit between the first pump 60 and the traveling motor 13 is provided with a flow rate control valve (not shown).

  The second pump 60 supplies hydraulic oil to the auger motor 22. The auger motor 22 is rotated by the supplied hydraulic oil, and rotates the auger 21 at a rotation speed corresponding to the hydraulic pressure of the hydraulic oil (that is, the number of rotations per unit time). The hydraulic oil supplied to the auger motor 22 is returned to the tank via a circuit (not shown).

  Note that description of the control of the traveling motor 13, the auger motor 22, and the first and second pumps 60 is omitted.

  The fourth pump 60 supplies hydraulic oil to the drive motors 31 of the eight vibrators 30. The eight drive motors 31 are provided in parallel with the fourth pump 60. The fifth pump 60 supplies hydraulic oil to the drive motors 31 of the remaining eight vibrators 30. The eight drive motors 31 are provided in parallel with the fifth pump 60. The drive motor 31 is rotated by the supplied hydraulic oil, and generates vibration of the vibrator 30 at a rotation speed corresponding to the hydraulic pressure of the hydraulic oil. The hydraulic oil supplied to the drive motor 31 is returned to the tank via a circuit (not shown).

  In addition, although description to FIG. 2 is abbreviate | omitted, the 6th pump 60 is a pump for operating a hydraulic cylinder.

<Valve>
The valve 70 is provided in a circuit through which hydraulic oil flows between the pump 60 and the drive motor 31, and is a valve that adjusts the open / close state of the circuit. In the present embodiment, the valve 70 is a throttle valve that can change the amount of hydraulic oil supplied to the drive motor 31 by changing the opening of the valve 70 in accordance with an operation by an operator.

  As shown in FIG. 3, the construction machine 1 corresponds to the operation unit 80, the engine rotation speed detection unit 91, the load factor related parameter detection unit 92, and a plurality (in the present embodiment, the drive motor 31). 16 motor rotation speed detectors 93, a rotary encoder 94, a plurality of (three in this embodiment, left, center, and right) surface distance detectors 95, an ECU 200, a controller 100, A first display unit 111, a second display unit 112, and a third display unit 113 are provided. In FIG. 3, two ECUs 200 are shown for convenience, but these are the same.

<Operation unit>
The operation unit 80 is provided on the control table, and includes switches, buttons, an adjustment dial, and the like that can be operated by an operator to operate the construction machine 1. The operation unit 80 includes an engine operation unit 81 and a plurality of valve operation units 82.

≪Engine operation part≫
The engine operation unit 81 is for changing the rotation speed of the engine 50 by changing the accelerator opening (for example, an accelerator pedal), and details of the operation of the operator or a control signal from the engine control unit 106 described later. A rotation speed command signal corresponding to the above is output to ECU 200.

≪Valve operation part≫
The valve operation unit 82 is for changing the opening degree of the plurality of valves 70 (for example, an adjustment dial).

<Various detection units>
≪Engine speed detection part≫
The engine rotation speed detection unit 91 is a sensor that detects the rotation speed of the engine 50 (engine rotation speed), and outputs the detected engine rotation speed to the ECU 200.

≪Load factor related parameter detector≫
The load factor related parameter detection unit 92 is a sensor that detects a parameter (for example, accelerator opening) other than the rotational speed for calculating the load factor of the engine 50, and outputs the detected parameter to the ECU 200.

≪Motor rotation speed detector≫
A plurality (only one is shown in FIG. 3) of motor rotation speed detectors 93 are sensors that respectively detect the rotation speeds (motor rotation speeds) of the drive motors 31 of the plurality of vibrators 30, and the detected motor rotation speeds. Is output to the control unit 100 via the second display unit 112.

≪Rotary encoder≫
The rotary encoder 94 detects the rotational speed of the wheels of the crawler traveling body 12 and outputs the detected rotational speed to the control unit 100.

≪Surface distance detection part≫
A plurality of surface distance detectors 95 (only one is shown in FIG. 3) are non-contact type distance meters that detect the distance (surface distance) to the surface of the pavement material leveled by the leveling device 20. (For example, a laser sensor), and outputs the detected surface distance to the control unit 100.

<ECU>
The ECU (Engine Control Unit) 200 includes a CPU (Central Processing Unit), a ROM (Read-Only Memory), a RAM (Random Access Memory), an input / output circuit, and the like, and serves as an engine control device that controls the engine 50. Computer.
ECU 200 acquires the rotation speed command signal output from engine operation unit 81 and controls the engine rotation speed of engine 50 based on the acquired rotation speed command signal.

  Further, in the present embodiment, the ECU 200 acquires the parameters detected by the engine rotation speed and load factor related parameter detection unit 92 detected by the engine rotation speed detection unit 91, and based on the acquired rotation speed and parameters. , And functions as a load factor calculation unit that calculates the load factor of the engine 50. A known method is used as a method for calculating the load factor. The acquired engine rotation speed and the calculated load factor are output to the control unit 100 as CAN (Control Area Network) data.

  In the present embodiment, the ECU 200 functions as a fuel consumption calculation unit that calculates the actual fuel consumption based on the engine rotation speed detected by the engine rotation speed detection unit 91 and the calculated load factor. The calculated actual fuel consumption is output to the control unit 100 as CAN (Control Area Network) data together with the engine speed and the load factor.

  The ECU 200 calculates the actual fuel consumption by a known method using the engine rotation speed, the load factor, and the like. In the following description, in order to distinguish from the fuel consumption at the rated rotation speed, the fuel consumption based on the engine rotation speed calculated by the ECU 200 may be referred to as the actual fuel consumption.

<Control unit>
The control unit 100 includes a CPU (Central Processing Unit), a ROM (Read-Only Memory), a RAM (Random Access Memory), an input / output circuit, and the like. Unit 102, fuel consumption calculation unit 103, construction distance calculation unit 104, travel speed calculation unit 105, engine control unit 106, and display data output unit 107.

≪Storage section≫
The storage unit 101 stores a table 101a representing the relationship between the engine speed of the engine 50, the load factor, and the fuel consumption. In the table 101a, the engine speed, the load factor, and the fuel consumption amount have the following relationship (see the graph of FIG. 4).
-When the engine speed is the same, the fuel consumption increases as the load factor increases.
・ When the load factor is the same, the fuel consumption increases as the engine speed increases.
The table 101a is created based on the actual measurement results of the engine speed, the load factor, and the fuel consumption with the engine 50 operated. The storage unit 101 stores the rated rotational speed of the engine 50 and constants necessary for calculating the hydraulic pressure usage rate, the construction distance, and the traveling speed.

≪Hydraulic usage rate calculation part≫
The hydraulic pressure utilization rate calculation unit 102 acquires the engine rotation speed detected by the engine rotation speed detection unit 91 via the ECU 200 and displays the motor rotation speed detected by the motor rotation speed detection unit 93 on the second display unit 112. The hydraulic pressure usage rate is calculated based on the acquired engine rotation speed and motor rotation speed. Here, the displacement volume of the pump 60 connected to the drive motor 31 of the vibrator 30 A, the displacement of the drive motor 31 B, the rotational speed of the engine V _E, when the rotational speed of the drive motor and V _M, hydraulic The usage rate C is calculated by the following formula.
C = Σ (B · V _M ) / Σ (A · V _E )
That is, the hydraulic utilization C, the sum of the products of the rotation speed V _M of the displacement B and the driving motor 31 of the drive motor 31 to the sum of the product of the rotational speed V _E (denominator) of the displacement A and the engine 50 of the pump 60 (Molecular) ratio.

  In the present embodiment, the hydraulic pressure usage rate calculation unit 102 calculates the hydraulic pressure usage rate for each of the fourth and fifth pumps 60. The displacement volumes A and B are stored in the storage unit 101. In addition, when the vibrator 30 is used as a tamper, the hydraulic pressure usage rate calculation unit 102 calculates the hydraulic pressure usage rate with the rotational speed of the vibrator 30 as a maximum value. Further, when the vibrator 30 is not used, the hydraulic pressure usage rate calculation unit 102 calculates the hydraulic pressure usage rate with the rotation speed of the vibrator 30 as 0. When the motor rotation speed detection unit 93 corresponding to the vibrator 30 is in failure, the hydraulic pressure usage rate calculation unit 102 calculates the average rotation speed of other vibrators 30 (that is, all the vibrators that have not failed). The hydraulic pressure usage rate is calculated using the average rotation speed of 30) as the rotation speed of the vibrator 30. The calculated hydraulic pressure usage rate is output to the engine control unit 106 and the display data output unit 107.

≪Fuel consumption calculation part≫
The fuel consumption amount calculation unit 103 acquires the load factor calculated by the ECU 200 and reads the rated rotation speed stored in the storage unit 101, and based on the acquired load factor and the read rated rotation speed, the engine The fuel consumption at 50 rated rotational speed is calculated. In the present embodiment, the fuel consumption amount calculation unit 103 reads the fuel consumption amount corresponding to the load factor and the rated rotation speed with reference to the table 101a based on the acquired load factor and the read rated rotation speed. The calculated fuel consumption at the rated rotational speed is output to the display data output unit 107.
Further, the fuel consumption calculation unit 103 includes a fuel consumption improvement rate (a ratio of the actual fuel consumption acquired from the ECU 200 to the fuel consumption at the rated rotation speed calculated by the fuel consumption calculation unit 103), and The difference between the actual fuel consumption acquired from the ECU 200 and the fuel consumption at the rated rotational speed calculated by the fuel consumption calculation unit 103 can be calculated and output to the display data output unit 107.

≪Construction distance calculation part≫
The construction distance calculation unit 104 acquires the rotational speed detected by the rotary encoder 94, and calculates the travel distance of the construction machine 1, that is, the construction distance based on the acquired rotational speed and the wheel diameter stored in the storage unit 101. To do. The calculated construction distance is output to the display data output unit 107.

≪Running speed calculation part≫
The traveling speed calculation unit 105 acquires the rotational speed detected by the rotary encoder 94, and calculates the traveling speed of the construction machine 1 based on the acquired rotational speed and the wheel diameter stored in the storage unit 101. The calculated traveling speed is output to the display data output unit 107.

≪Engine control part≫
The engine control unit 106 is a functional unit that operates when the construction machine 1 automatically adjusts and controls the rotation speed of the engine 50 without depending on the operation of the engine operation unit 81 by the operator. In the present embodiment, the engine control unit 106 outputs a control signal for automatically controlling the rotation speed of the engine 50 so that the hydraulic pressure usage rate does not exceed a predetermined value, or an engine operation unit 81 (or another operation not shown). Switch). Further, the engine control unit 106 outputs a control signal for automatically controlling the rotation speed of the engine 50 so that the load factor does not exceed a predetermined value, to the engine operation unit 81 (or another operation switch (not shown)). You can also The engine operation unit 81 (or another operation switch (not shown)) operates in response to the control signal, and realizes a desired rotation speed of the engine 50 via the ECU 200.

≪Display data output part≫
The display data output unit 107 includes the detected engine rotation speed, motor rotation speed and surface distance, load factor and actual fuel consumption calculated by the ECU 200, and calculated hydraulic usage rate and fuel consumption at the rated rotation speed. The amount, the construction distance, and the traveling speed are acquired, display data is generated based on the acquired data, and the generated display data is output to the display units 111 and 113.

<Display section>
≪First display part≫
The first display unit 111 is a touch panel type monitor device that is provided on the control panel and displays a screen based on display data output from the display data output unit 107.

≪Second display part≫
The second display unit 112 is a monitor device that is provided on the control table, acquires the motor rotation speed detected by the motor rotation speed detection unit 93, and displays the acquired motor rotation speed. In addition, the second display unit 112 outputs the acquired motor rotation speed to the control unit 100.

≪Third display part≫
The third display unit 113 is provided on the first frame 11 a of the construction machine 1 and is a touch panel type monitor device that performs screen display based on the display data output from the display data output unit 107.

  The first display unit 111 and the second display unit 112 are monitor devices that are monitored by an operator on the control platform, and the third display unit 113 is used by an operator who moves along the travel of the construction machine 1. This is a monitoring device for monitoring.

<Operation example>
Next, an example of adjusting the rotational speed of the engine 50 and the opening degree of the valve 70 during construction of the paving material by the construction machine 1 will be described.

<Before construction start>
First, the display data output unit 107 generates display data for the start screen and outputs it to the first display unit 111. The first display unit 111 acquires display data for the start screen, and displays the start screen shown in FIG. 5 based on the acquired display data.

≪Construction setting≫
When the operator selects “construction setting” on the start screen, the first display unit 111 outputs the selection result to the display data output unit 107. The display data output unit 107 acquires the selection result, generates display data for the construction setting screen based on the acquired selection result, and outputs the display data to the first display unit 111. The 1st display part 111 acquires the display data for construction setting screens, and displays the construction setting screen shown in FIG. 6 based on the acquired display data. The operator operates the first display unit 111 on which the construction setting screen is displayed, thereby performing “construction name”, “construction thickness”, “construction width”, and “measurement interval (for example, 20 [m] for a general road). In the case of an expressway, input 100 [m] and “station name (numbering of side points etc.)”.

≪Machine setting≫
Further, when the operator selects “machine setting” on the start screen, the first display unit 111 outputs the selection result to the display data output unit 107. The display data output unit 107 acquires the selection result, generates display data for the machine setting screen based on the acquired selection result, and outputs the display data to the first display unit 111. The first display unit 111 acquires display data for the machine setting screen, and displays the machine setting screen shown in FIG. 7 based on the acquired display data. The operator operates the first display unit 111 on which the machine setting screen is displayed to set the machine number of the construction equipment 1 and change the operation method of the 16 vibrators 30 to “vibrator”, “tamper”, “unused” "Is selected and set.

≪Numerical monitor≫
When the operator selects “Numerical Monitor” on the start screen, the first display unit 111 outputs the selection result to the display data output unit 107. The display data output unit 107 acquires a selection result, generates display data for a numerical monitor screen based on the acquired selection result, and outputs the display data to the first display unit 111. The first display unit 111 acquires display data for the numerical monitor screen, and displays the numerical monitor screen shown in FIG. 8 based on the acquired display data. The numerical monitor screen is applied to a value obtained by converting the rotational speeds of the drive motors 31 of the plurality of vibrators 30 into voltages, the engine rotational speed of the engine 50, the load factor, the fuel consumption, and the surface distance detection unit (distance meter) 95. A measured value such as a voltage or a calculated value based on the measured value is displayed.

<Under construction>
Subsequently, the construction machine 1 performs pavement material construction by a slip form construction method. That is, when the engine 50 is driven and various motors are rotated, the crawler traveling body 12 travels, the auger 21 rotates and the paving material is spread between the molds 40, and the vibrator 30 vibrates and paves. Compact the material. In the present embodiment, the ECU 200 drives the engine 50 at an engine rotation speed (for example, 1500 [rpm]) lower than a rated rotation speed (for example, 2000 [rpm]) as an initial setting.

  Further, when the operator selects “Construction” on the start screen immediately before the start of construction, the first display unit 111 outputs the selection result to the display data output unit 107. The display data output unit 107 acquires the selection result, generates display data for the first construction screen based on the acquired selection result, and outputs the display data to the first display unit 111. The 1st display part 111 acquires the display data for 1st construction screens, and displays the 1st construction screen shown in FIG. 9 based on the acquired display data. On the first construction screen, the measuring point, construction distance, traveling speed, engine speed, load factor, hydraulic usage rate of the fourth and fifth pumps 60 for the vibrator 30, actual fuel consumption, rated speed Fuel consumption, fuel consumption improvement rate (the ratio of the actual fuel consumption obtained from the ECU 200 to the fuel consumption at the rated rotational speed calculated by the fuel consumption calculation unit 103), and the amount of blow-up It is displayed.

  Here, the construction distance is set to 0 when the operator operates 0 set at the start of construction. The station is counted every time the operator taps before starting construction to determine the position of the station at the start of construction and the calculated construction distance reaches the set station interval.

  The blow-up amount is a surface distance detected by the surface distance detection unit 95, and when the operator operates 0 set, the value at that time is 0, and “detected value−value at 0 set” Is displayed.

  Further, when the rotational speed of the vibrator 30 falls below a lower limit value (for example, 3000 [rpm]), the motor rotational speed detection unit 91 has failed (the detected value is 500 [rpm] when the drive motor 31 is operating). In the case where the load ratio of the engine 50 exceeds a predetermined value (for example, 90%), the hydraulic pressure usage ratio of the third and fourth pumps 60 exceeds a predetermined value (for example, 90%). When the blow-up amount exceeds a predetermined value (for example, 20 [mm]), a call button described later is operated, a corresponding warning message is displayed on the first display unit 111.

  When the operator selects “next page” on the first construction screen, the first display unit 111 outputs the selection result to the display data output unit 107. The display data output unit 107 acquires the selection result, generates display data for the second construction screen based on the acquired selection result, and outputs the display data to the first display unit 111. The 1st display part 111 acquires the display data for 2nd construction screens, and displays the 2nd construction screen shown in FIG. 10 based on the acquired display data. On the second construction screen, the motor rotation speeds of the drive motors 31 of the plurality of vibrators 30 are displayed as bar graphs, respectively.

  Further, the display data output unit 107 generates display data for the third construction screen and outputs it to the third display unit 113. The 3rd display part 113 acquires the display data for 3rd construction screens, and displays the 3rd construction screen shown in FIG. 11 based on the acquired display data. On the third construction screen, the measurement point, construction distance, travel speed, and blow-up amount are displayed, and the motor rotation speeds of the drive motors 31 of the plurality of vibrators 30 are displayed as bar graphs. When the operator operates the call button on the third construction screen, a warning message is displayed on the first construction screen (see FIG. 9).

  The operator of the control panel mainly monitors the first display 111 and the second display 112 on which the first construction screen is displayed, and operates the engine operation unit 81 and the valve operation unit 82 based on the display contents. To do.

<Adjustment of motor rotation speed>
The operator mainly drives the state of the pavement material supplied to the construction surface S, the amount of blow-up displayed on the first display unit 111, and the plurality of vibrators 30 displayed on the second display unit 112. By monitoring the motor rotation speed of the motor 31 and operating the valve operation unit 82, the motor rotation speed of the drive motor 31 operating as a vibrator is set to substantially the same rotation speed.

<Adjustment of engine speed>
As described above, as an initial setting, the ECU 200 drives the engine 50 at an engine speed (for example, 1500 [rpm]) smaller than a rated speed (for example, 2000 [rpm]).

  For example, when the valve 70 is controlled to be fully opened because the pavement material is hard and difficult to compact, the hydraulic usage rate increases when the construction width is wide and the number of vibrators 30 used is increased. Here, when the hydraulic pressure usage rate exceeds a predetermined value (for example, 90%), the operator operates the engine operation unit so as to increase the engine rotation speed (for example, increase the engine rotation speed by a predetermined value or a predetermined ratio). 81 is operated.

  Thereafter, when the hydraulic pressure usage rate becomes equal to or less than the predetermined value, the operator operates the engine operation unit 81 so as to decrease the engine rotation speed (for example, to set the engine rotation speed to the initial setting). The ECU 200 controls the engine rotation speed in accordance with the operation content. In this way, energy saving operation is realized by making the initial setting of the engine rotation speed smaller than the rated rotation speed, and the oil pressure usage rate is lowered by increasing the engine rotation speed when the oil pressure usage rate increases. Thus, the hydraulic oil can be stably supplied to the drive motor 31 of the vibrator 30.

  Further, when the uphill is constructed, when the pavement material is hard and a high load is applied to the auger 21, the load factor of the engine 30 becomes large. Here, when the load factor exceeds a predetermined value (for example, 90%), the operator operates the engine operation unit 81 so as to increase the engine rotation speed (for example, increase the engine rotation speed by a predetermined value or a predetermined ratio). To operate.

  Thereafter, when the load factor becomes equal to or less than the predetermined value (for example, when the construction machine 1 moves to a flat ground or a downhill), the operator decreases the engine speed (for example, the initial engine speed and The engine operation unit 81 is operated as follows. The ECU 200 controls the engine rotation speed in accordance with the operation content. As described above, energy saving operation is realized by making the initial setting of the engine rotation speed smaller than the rated rotation speed, and the load factor of the engine 50 is increased by increasing the engine rotation speed when the load factor increases. It can be lowered to prevent the engine 50 from being broken.

  In addition, even when the engine 50 behaves unstable, such as at the beginning of construction, the operator can operate the engine operation unit 81 to increase the engine rotation speed. The ECU 200 controls the engine rotation speed in accordance with the operation content.

  The engine speed adjustment method described above is based on manual operation of the engine operation unit 81 by the operator. However, the engine control unit 106 does not operate manually through the engine operation unit 81 and the ECU 200 without manual operation of the engine operation unit 81. A configuration in which the engine rotational speed is automatically adjusted and controlled may be employed.

That is, the engine control unit 106 increases the engine rotation speed when the hydraulic pressure usage rate exceeds a predetermined value without the operator's manual operation of the engine operation unit 81, and then the hydraulic pressure usage rate becomes the predetermined value. The configuration may be such that the engine 50 is automatically controlled via the ECU 200 so that the engine rotation speed is reduced (returned to the original value) when the following occurs.
In addition, the engine control unit 106 increases the engine rotation speed when the load factor exceeds a predetermined value without depending on the manual operation of the engine operation unit 81 by the operator, and thereafter the load factor becomes equal to or less than the predetermined value. In this case, the engine 50 may be automatically controlled via the ECU 200 so that the engine rotation speed is reduced (returned to the original value).

  Since the construction machine 1 according to the embodiment of the present invention calculates and displays the hydraulic pressure usage rate of the vibrator 30, the operator can grasp the hydraulic pressure usage rate, and while preferably applying vibration by the vibrator 30, the vibrator It is possible to favorably support the energy saving operation by the operator according to the 30 operating conditions.

  Moreover, since the construction machine 1 displays the load factor of the engine 50, the operator can grasp the load factor and can favorably support the energy saving operation by the operator.

Moreover, since the construction machine 1 displays the actual fuel consumption calculated based on the engine rotation speed and the load factor of the engine 50 in the ECU 200, the construction machine 1 is obtained based on the capability table of the engine 50 without considering the load factor. Compared with the case where the obtained fuel consumption is displayed, the operator can be made to grasp the more accurate fuel consumption, and energy saving operation by the operator can be favorably supported.
In addition, the construction machine 1 drives the engine 50 at a rotational speed smaller than the rated rotational speed, and displays the fuel consumption at the actual engine rotational speed and the fuel consumption at the rated rotational speed for comparison. Driving can be favorably supported.

  Moreover, since the construction machine 1 controls the engine rotation speed based on at least one of the hydraulic usage rate and the load factor, the energy saving operation of the construction machine 1 can be performed more suitably.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably. For example, the number and arrangement of the vibrators 30 are not limited to those described above, and are appropriately set according to the material of the paving material and the width of the construction surface S. Alternatively, the fuel consumption calculation unit 103 may calculate the difference between the actual fuel consumption and the fuel consumption at the rated rotation speed and display the difference on the first display unit 111. That is, the first display unit 111 displays both the actual fuel consumption acquired from the ECU 200 and the fuel consumption at the rated rotational speed calculated by the fuel consumption calculation unit 103, and the actual fuel consumption acquired from the ECU 200. The actual amount obtained from the ECU 200 with respect to the difference between the fuel consumption at the rated rotational speed calculated by the fuel consumption calculation unit 103 and the fuel consumption at the rated rotational speed calculated by the fuel consumption calculation unit 103 It may be configured to display at least one of the fuel consumption ratios.

  In addition, the engine control unit 106 and the ECU 200 may automatically control the engine 50 so that the engine rotation speed increases as the hydraulic pressure usage rate increases. The engine rotation speed increases as the load factor of the engine 50 increases. Thus, the engine 50 may be automatically controlled. That is, the engine control unit 106 and the ECU 200 only need to be able to cooperate to realize the function as the engine control unit of the present invention, and the engine control unit 106 of the control unit 100 may be embodied in the ECU 200. . When the valve 70 is an electromagnetic valve, a ball valve, or the like, the control unit 100 may include a valve control unit that controls the opening amount of the valve 70 based on the operation content of the valve operation unit 82. Good. Further, as a reference form, the hydraulic pressure usage rate calculation unit 102 may calculate the hydraulic pressure usage rate based on the rotation speed of the pump 60 instead of the engine rotation speed. Moreover, the construction machine of this invention is applicable also to various construction methods other than a slip form construction method.

DESCRIPTION OF SYMBOLS 1 Construction machine 10 Vehicle main body 12 Crawler traveling body 20 Spreading unit 21 Auger 30 Vibrator 31 Drive motor 50 Engine 60 Pump 70 Valve 81 Engine operation part 82 Valve operation part 101 Storage part 102 Hydraulic usage rate calculation part 103 Fuel consumption calculation Unit 106 engine control unit 111 first display unit 200 ECU (engine control device)

Claims (5)

An engine,
A hydraulic pump driven by the engine;
A motor driven by hydraulic pressure from the hydraulic pump, and a plurality of vibrators for compacting the pavement material;
A plurality of valves provided between the hydraulic pump and the vibrator;
An engine operating unit operated by an operator to change the rotational speed of the engine;
A valve operating unit operated by an operator to change the opening amounts of the plurality of valves;
A hydraulic usage rate calculation unit that calculates a hydraulic usage rate that is a ratio of the sum of the product of the displacement volume of the motor and the rotational speed of the motor to the product of the displacement volume of the hydraulic pump and the rotational speed of the engine;
A display unit for displaying the calculated hydraulic pressure usage rate;
Construction machine characterized by comprising. The construction machine according to claim 1, further comprising an engine control unit that increases a rotation speed of the engine when the hydraulic pressure usage rate exceeds a predetermined value. The construction machine according to claim 1, wherein the display unit displays a load factor of the engine acquired from an engine control device. The construction machine according to claim 3, further comprising an engine control unit that increases a rotation speed of the engine when the load factor exceeds a predetermined value. A storage unit for storing the relationship between the rotational speed of the engine, the load factor, and the fuel consumption;
A fuel consumption calculation unit that calculates the fuel consumption at the rated rotation speed based on the rated rotation speed of the engine and the actual load factor and the relationship stored in the storage unit;
With
The display unit calculates both the actual fuel consumption acquired from the engine control device and the fuel consumption at the calculated rated rotational speed, and the actual fuel consumption acquired from the engine control device. At least one of a difference from the fuel consumption at the rated rotational speed calculated and a ratio of the actual fuel consumption obtained from the engine control device to the fuel consumption at the calculated rated rotational speed. The construction machine according to claim 4, wherein: