KR101058463B1 - Display of construction machinery - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a construction machine, wherein when an operator displays other information such as vehicle status information on a monitor, the operator can smoothly and surely and easily display the rear view image at an accurate timing. The monitor screen can be switched.

In the display device of the construction machine according to the present invention, the work levers 6 and 7 are provided on the right and left sleeve portions 5L and 5R of the driver's seat 5, and the driving device is used for traveling in the front position of the driver's seat 5. The operation levers 8a and 8b and the operation pedals 9 and 9 are provided, and the changeover switch 16 is provided in the grip portion 6a of the work lever 6 including the swing operation. By operating the switch 16, the image of the monitor 12 can be switched between the vehicle status information and the rear view image.

Construction Machinery, Vehicle Situation Information, Operators, Monitors, Toggle Switches

Description

Display of construction machinery {DISPLAY DEVICE OF CONSTRUCTION MACHINERY}

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the hydraulic excavator as an example of the construction machine which shows one Embodiment of this invention.

It is a principal part block diagram which shows the internal structure of the cab in the hydraulic excavator of FIG.

3 is a diagram illustrating an example of a vehicle status display screen in the display device.

4 is a diagram illustrating an example of a rear view image display screen in the display device.

5 is an external view of a work lever.

6 is a diagram illustrating the configuration of a switching mechanism of the monitor by the changeover switch.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a construction machine, which is installed in a cab of a construction machine such as a hydraulic excavator and allows an operator to recognize various kinds of information.

One example of construction machinery is a hydraulic shovel. As is well known, the hydraulic excavator drives a hydraulic pump by an engine and supplies the hydraulic oil output from the hydraulic pump to a hydraulic actuator including a hydraulic cylinder or a hydraulic motor that is mounted on each operation part. It is. And each of these operation parts is normally operated by an operator in a cab, and operated by operation means, such as an operation lever, and the operation | work of earth excavation, etc. is performed.

The cab is equipped with various instruments in order to let the operator know the operating status of the machine. For example, there are a total engine speed, a fuel gauge, a cooling water thermometer, a hydraulic oil thermometer, an hour meter, and the like. In addition, information about the safe operation of the machine, for example, whether the gate lock lever is in the normal position, is also displayed, and whether or not the starter key is entered is also determined. In addition, the type of attachment attached to the front work machine and the like are also recognized. Then, a display device for displaying these information, that is, vehicle status information, is provided.

As this display apparatus, what made it the structure which collectively displays as a color image on the screen of the monitor by a liquid crystal display according to high definition, low price, etc. of a liquid crystal display is put to practical use. By using this display device, various types of information can be displayed in a compact configuration, and the operator can accurately grasp the operating state of the machine. In addition, in recent years, a rear view camera is installed in a construction machine, and the camera image has been developed so that a rear view that cannot be seen in the posture normally operated by the operator is assisted by the video of the camera.

If the driver's seat where the operator sits in the driver's cab is provided, and the operator sits in the driver's seat, it is difficult to see the monitor unless the monitor is disposed at the front position or the inclined front position. For this reason, if the vehicle situation information display image and the rear view image which display the operation | movement state of the machine mentioned above are displayed on separate monitors, these monitors may interfere, and the front vision may be restricted and operator attention may be distracted. There is a possibility. Here, the rear view image should always be displayed, and is intended to give the operator an auxiliary view in order to confirm the safety of the surroundings, such as when the vehicle is backed up. On the other hand, the vehicle status information should always be displayed whenever possible, but the machine may be operated under special circumstances, such as when ventilation is poor, such as indoors, and the machine must be operated in the state immediately before the engine overheats. The operator does not always keep an eye on the vehicle situation, except for the case where it is activated. Therefore, in principle, it is known from Japanese Patent Application Laid-Open No. 2002-371594 that the vehicle status information is displayed on the monitor and configured so that the monitor can be switched to the rear view image when the vehicle is reversed.

In this prior art configuration, when the traveling operation means is operated, this is detected according to the pilot pressure, so that the monitor is automatically switched to the rear view image. In addition, instead of automatically detecting the operation of the traveling operation means, a switch is provided in the traveling operation means, and when the operator operates the operation means, that is, when the vehicle is to be reversed, the monitor causes the rear view to be reversed. It is also proposed in the above-mentioned prior art to be able to switch to the state which illuminates an image.

By the way, in the above-described prior art configuration, the monitor always displays the basic image, that is, vehicle status information such as the temperature of the hydraulic oil and the temperature of the engine coolant, and the driving operation means, specifically, the traveling lever and the traveling pedal. After the operation, the screen is switched from the basic image to the rear view image, but when the driving means for driving is operated, the vehicle travels accordingly, and even if the rear view image can be obtained at this time, it is insufficient as a safety measure. Was. In other words, if an operator or the like enters a vehicle's immediate position, even if it is illuminated by a monitor and the operator confirms this, the operator may not be able to take sufficient measures as a safety device. You may not be able to.

In addition, when a switch is provided in the traveling operation means, for example, the traveling lever to switch the screen manually, it is possible to operate to display the rear view image on the monitor at the stage before the vehicle actually reverses. . However, even if the switch for image switching is provided in the travel lever, the operability is not necessarily satisfactory.

That is, as the operation means provided around the driver's seat, not only the above-described travel lever but also a work lever for performing the operation of the other parts are provided, and the work lever is disposed on the left and right sleeves of the driver's seat, The traveling lever is generally disposed in front of the driver's seat. Therefore, when the elbows of both hands of the operator are placed on the sleeve and the hands are placed on the left and right work levers, the hand is brought forward and the hands are placed on the travel levers. Since the operation is performed immediately by holding the travel lever, even if a switch is attached to the travel lever, it is not guaranteed that the rear view image is always displayed on the monitor in advance. In addition, since the travel lever cannot be operated at the time of the compound operation for simultaneously operating the work lever and traveling of the vehicle, an operation pedal is provided as a travel operation means. Therefore, in order to drive while operating the left and right work levers, it is necessary to use the operation pedal. Therefore, it is practically impossible to release the hands from the work levers to operate the switches mounted on the travel levers. In view of the above, it is not always reasonable to provide a switch for switching images of the monitor to the travel lever.

In addition, the rear view image must be displayed on the monitor not only at the time of reversing the vehicle but also at the time of turning. However, when the switch is provided to the travel operation means as in the above-described conventional technique, the display of the rear view image on the monitor is only at the time of traveling, and there is no concern that the rear view image is displayed on the monitor at the time of turning.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and when an operator displays other information such as vehicle status information on a monitor, the operator can smoothly and reliably and easily display the rear view image at an accurate timing. Its purpose is to be able to switch the screen of a monitor.

In order to achieve the above object, the configuration employed in the present invention is an engine, a hydraulic pump driven by the engine, and a pressure supplied from the hydraulic pump to an upper swing structure rotatably provided on the lower traveling body. A plurality of operating parts driven by oil is provided, and a camera is provided which detects at least the remaining amount of fuel supplied to the engine, the engine cooling water temperature, and the operating oil temperature, and monitors the periphery of the machine. In a construction machine provided with a monitor in a cab in which a rear view image obtained from a switchable display is switched to another image, in the cab, work levers are provided at both sleeve portions on the left and right sides of the driver's seat or in the vicinity thereof. At least one working lever of the left and right working levers is provided with a switching switch for switching images of the monitor. And that the last name as its features.

Here, the construction machine is equipped with sensors and the like in each of the operation units, and acquires various data to cause the operator to recognize the current state. That is, the engine coolant temperature and the hydraulic oil temperature are also displayed, and the remaining battery amount and engine oil hydraulic pressure are also displayed. It is also preferable to include an operation time display and a display of the current time. It is necessary for the operator to always recognize these as vehicle status information in order to operate the construction machine without difficulty and stably and efficiently, and to suppress the occurrence of failure. Therefore, the vehicle status information is always displayed on the monitor so that the screen can be switched to the state in which the rear view image is displayed as required by the switch operation.

The work lever is equipped with a front work machine in a hydraulic excavator, for operating this front work machine, and the rotation of the upper swing body is also controlled by the work lever. And two work levers are normally provided and are arrange | positioned at the left and right both sides of a driver's seat. Therefore, if a changeover switch is provided in any one work lever, the operability of the image switching operation of a monitor improves for an operator. The work lever to which the changeover switch is provided is more preferably a work lever for performing swing operation, and may be provided to the two work levers.

Since the present invention has been configured as described above, the operability of the operation of switching to the rear view image of the monitor screen becomes very good for the operator of the construction machine, and it is possible to switch images smoothly, reliably and easily at the required timing. Effect can be obtained.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described with reference to drawings. In this embodiment, the display device of the hydraulic excavator is described as a construction machine. However, the construction machine to which the display device is mounted is not limited to this hydraulic excavator.

First, the whole structure of a hydraulic excavator is shown in FIG. In this figure, (1) is a crawler type lower traveling body, (2) an upper swinging body, (3) is a front work machine which consists of excavating work means provided in the upper swinging body (2). In addition, an operator's cab (cap) 4 is provided in the upper swinging structure 2 to operate the machine, and the cab 4 runs by the lower traveling body 1. To operate the boom 3a, the arm 3b, the bucket 3c, etc., which constitute the front work machine 3 for turning the upper swing structure 2, and excavation of earth and sand. An operating means including a lever is installed.

The internal structure of the cab 4 is shown in FIG. As is evident from this figure, the driver's seat 5 is provided in the cab 4 for the operator to sit and operate the hydraulic excavator, and the left and right sleeve parts 5L, 5R of the driver's seat 5 are operated. The levers 6 and 7 are mounted, and a pair of operation levers 8a and 8b and operation pedals 9a and 9b are attached to the front position of the driver's seat 5. The operating levers 6 and 7 provided in the two sleeve portions 5L and 5R respectively constitute the boom 3a, the arm 3b, the bucket 3c and the operating means for turning, which are hereinafter referred to as working levers. . The work levers 6 and 7 can be tilted and moved back and forth and left and right, respectively, and the operation functions of the four operation parts mentioned above are assigned. For example, the work lever 6 provided in the left sleeve part 5L is for turning and bucket operation, and the work lever 7 installed in the right sleeve part 5R is for boom and arm operation. . Moreover, the operation levers 8a and 8b located in front of the driver's seat 5 are for left and right travel, and are operation pedals 9a and 9b and left and right driving means.

Here, as the operation means for traveling, the operation lever and the operation pedal are provided together to perform a compound operation. That is, when only the vehicle travels, any one of the operation levers 8a and 8b or the operation pedals 9a and 9b may be operated. For example, the boom 3a is operated while traveling and the upper swing structure When performing the compound operation to turn (2), it is necessary to operate the work levers 6 and 7 with both hands, so that the operation pedals 9a and 9b drive the vehicle.

The hydraulic excavator is configured as described above, but usually, the drive is a hydraulic drive type that drives a hydraulic pump by an engine and drives a hydraulic actuator such as a hydraulic motor or a hydraulic cylinder. Therefore, various sensors for detecting the operating state of the engine relationship are installed, various sensors are installed in each part of the hydraulic drive system, and sensors are also installed in the operating parts of the front work machine 3 and the like, and the operation of the hydraulic excavator is performed. Each department is monitored. Among the detection information by each of these sensors and the like, it is preferable that the operator recognizes something, it is essential that the operator recognizes it, and there is no need to inform the operator. The information that needs to be recognized by the operator is information on the operation status of the vehicle, and some of these information must be recognized urgently and reliably. In other words, the information that needs to be informed to the operator includes general vehicle status information and abnormal information on occurrence of an abnormal condition in which a serious failure or the like in the hydraulic excavator may occur.

This hydraulic excavator is provided with a camera for monitoring in order to assist the external view by an operator. 10 is mounted on the counter weight 11 installed at the rear position of the upper swinging structure 2 to secure the rear view, and to perform safety confirmation to the operator who operates the machine in the cab 4. This is a camera for assisting to secure a field of view. Therefore, the camera 10 for securing this rear view is very important in the point of ensuring safety of work | work.

In the cab 4, as shown in FIG. 2, a monitor 12 made up of a liquid crystal display or the like is provided, and various kinds of information are displayed on the monitor 12, so that these operators can operate the machine. To make information aware. Therefore, the monitor 12 can be seen even while the operator is operating each mechanism part constituting the hydraulic excavator. In operation, however, it is necessary not to obstruct the front view as much as possible. For this reason, the monitor 12 has a relatively small screen, is arranged in the cab 4 in front of the inclination of the driver's seat 5, and is attached to the pillar 13, for example.

The monitor 12 can display the necessary information, but first the vehicle status display image is displayed. An example of this vehicle state display image is shown in FIG. As display information specifically shown in this figure, as an icon display, the bucket 3c at the tip of the arm A 3b constituting the display A1 and the front work machine 3, in order from the left side of the figure, in turn. ) A2, operating load status A3, travel speed indication A4, indication whether auto-idle A5, lighting A6 or not, lights A6, wiper operation There is a presence / absence display A7, and with this, there is an operation time display section B, and the operation time is displayed numerically. In the lower area, that is, the large area of the central portion of the monitor 12, the engine cooling water temperature display C1, the hydraulic oil temperature display C2, and the fuel remaining amount display C3 are arranged to perform character display. In addition, although there are indication parts D1 and D2 of the battery remaining amount and engine oil oil pressure at the bottom, when the battery charge amount and the oil pressure of the engine oil are maintained at a constant level and when the battery charge amount and the oil pressure of the engine oil are lower than the predetermined level, The display state, such as a change in lightness or a change in color tone, is changed.

In addition, what is displayed as vehicle status information does not need to include all these information, and can also make it contain information other than these information. The point should just display the present state of the vehicle which an operator should recognize. However, whatever the display form, the engine cooling water temperature display C1, the hydraulic oil temperature display C2, and the fuel remaining amount display C3 must be included at least.

In addition, the monitor 12 displays an image obtained by the camera 10 acquiring the rear view. In this video, as shown in FIG. 4, the landscape video on the rear and rear sides of the vehicle is displayed as a rear view image on the entire screen of the monitor 12. The field of view in this direction cannot be seen when the operator is performing normal work in a state where the operator is seated in the driver's seat 5. Therefore, by displaying this rear view on the monitor 12, the operator is given an auxiliary view in a range that becomes a blind spot.

As mentioned above, although the typical thing of the image displayed on the monitor 12 was shown to FIG. 3 and FIG. 4, it can also set so that various information can be displayed other than these. For example, there is an image which displays abnormal information, and this abnormal information display image informs an operator that a situation which causes a malfunction or an accident will occur, if the machine continues to operate as it is. When the charging voltage of the battery is below the specified value, when the oil pressure of the engine oil is below the specified value, when the engine coolant is above the specified temperature, and when the operating oil temperature rises abnormally, The filter is clogged. In order to prompt the operator to recognize these situations, for example, a message can be set to be displayed prominently in the center portion of the screen of the monitor 12, that is, the portions of the character displays C1 to C3 in FIG. In addition, when the vehicle is equipped with a communication device, and communication with the management center of the machine is made possible through the communication antenna 14 (FIG. 1), the communication information including the contact information from the management center side is also monitored ( 12) can also be displayed.

As described above, the monitor 12 displays various types of information, but the operator selects and displays the desired information. For this reason, the selection switch group 15 is provided in the part of the frame in the monitor 12, and by operating these selection switch group 15 suitably, the image displayed on the monitor 12 can be selected. have.

By the way, of the above-mentioned images, the display image of the vehicle situation information shown in FIG. 3 is a basic thing, and unless the operator especially desires, this vehicle state information will always be displayed, and other images may be used as needed. The display is switched from the situation information image. Among the above-mentioned images, the abnormality information display image is displayed automatically when the apparatus or the like is in an abnormal state due to its nature, and the operator has no choice. In addition, since communication information such as a contact point from the management center is not particularly related to the operation of the hydraulic excavator, this information is read out by operating the selector switch group 15 at the time of rest of the work or the like. 12).

The rear view image shown in FIG. 4 is required at least when the vehicle retracts and when the upper swing structure 2 swings, and thus is switched from the vehicle status display image displayed on the monitor 12 to change the rear view image. Is displayed. Here, the display of the rear view image is required during the operation of the hydraulic excavator, while the operator is operating the operation means performed by the lever, the pedal, or the like, so that the selection switch group provided on the monitor 12 for the operator ( It is not desirable to force the operation of 15). Therefore, it is comprised so that an image may be switched smoothly and easily at the optimal timing, when needed, without interrupting the operation, while operating the hydraulic excavator.

Originally, when the operator sits in the driver's seat 5 and operates the operation parts of the hydraulic excavator, the left and right elbows are placed on the sleeve portions 5L and 5R to take the state of holding the work levers 6 and 7. Is common. These work levers 6 and 7 are for operating the front work machine 3 which consists of the boom 3a, the arm 3b, and the bucket 3c, and perform the operation which turns the upper swing body 2 to rotate. It is for. Therefore, during operation, the operation of tilting the work levers 6 and 7 back and forth and from side to side is frequently performed, so that the operator hardly releases these work levers 6 and 7. Of course, the vehicle may be driven while operating one or both of the work levers 6 and 7. In this case, the two operation levers 8a and 8b for driving are operated simultaneously with one hand, or the vehicle is driven by stepping on the operation pedals 9a and 9b. Here, the operation levers 8a and 8b for driving are so-called steering at the time of switching the running direction of the vehicle. For this reason, the inclination of one operation lever 8a and the other operation lever 8b is inclined. The reason for this is to be operable to change the moving direction. In the work such as excavation and excavation of earth and sand, forward or backward is the main driving, and steering is very rare. Thus, two operation levers or two operation pedals are operated at the same time.

In view of the above, in the present invention, at least one of the work lever 6 or 7, preferably, as shown in FIG. 5, the grip portion 6a of the work lever 6 including the swing operation. The changeover switch 16 is provided at this position, and the image of the monitor 12 can be switched by operating the changeover switch 16. As shown in FIG. 6, the work levers 6 and 7 are connected to a hydraulic pilot valve 6P, and are directional valves for controlling supply of pressure oil from the hydraulic pilot valve 6P to the hydraulic actuator. Pressure is applied to the hydraulic pilot section of (17) to switch the direction switching valve 17, and the switching operation of the direction switching valve 17 is performed by tilting in the direction indicated by the arrow in this figure. will be.

The changeover switch 16 is operable with the finger which grasped the grip part 6a of the work lever 6, and when this changeover switch 16 is operated, the signal is received by the control apparatus 18, The image displayed on the monitor 12 is switched. Here, the switching of the image by the changeover switch 16 is the vehicle situation information image shown in FIG. 3 and the rear view image shown in FIG. 4. Therefore, when the switch switch 16 is operated in the state in which the vehicle situation information image is displayed on the monitor 12, the switch switch 16 is completely replaced with the rear view image and the switch 16 is displayed in the state where the rear view image is displayed. By operation, the vehicle status information display image is switched.

It is now assumed that the hydraulic excavator is operated to excavate the soil and load the excavated soil into the dump truck. This operation arrange | positions a hydraulic excavator to an excavation position, makes the boom 3a of the front work machine 3 an angle which can be excavated, and then operates the bucket 3c, operating the arm 3b, and the bucket 3c. Excavation of earth and sand Then, by raising the boom 3a and operating the arm 3b or the bucket 3c as necessary, the upper swinging body 2 is pivoted by a predetermined angle, so that the bucket 3c is placed on the upper portion of the loading portion of the dump truck. Move to position Then, the bucket 3c is operated to rotate the earth and sand to the position where the excavation is performed again after loading the earth and sand into the dump truck. Although this operation is repeatedly performed, the excavation position changes as the excavation proceeds, and the dump truck is moved along with this. However, there are some places where the dump truck cannot be picked up depending on the state of the workplace, and in that case, the lower traveling body 1 travels every time excavation is performed. That is, the hydraulic excavator is advanced (or retracted) to the excavation position, the excavation of the earth and sand by the front work machine 3 is carried out, and the hydraulic excavator is reversed (or advanced) to the injection position of the earth and sand to the dump truck some time later.

While performing these series of operations, it is necessary to obtain the rear view, at the time of turning of the upper swing body 2 and at the time of backward movement by the lower travel body 1. When the lower traveling body 1 is moved forward and when the soil is excavated using the front work machine 3, or when the excavated soil is loaded into the dump truck, the operator can directly see the operating parts, so that the rear view can be viewed. You don't have to get it. However, since the upper swinging structure 2 is capable of turning 360 degrees with respect to the lower traveling body 1, when the upper swinging body 2 is rotated 180 degrees, the forward and backward movements of the vehicle are reduced. Inverted. Therefore, it is necessary to perform safety check of the surroundings at the time of driving, even if it moves forward and backward. After starting the hydraulic excavator, it is necessary to check the safety of the surroundings before entering the work, and at this time, the rear view image is displayed on the monitor 12 to determine whether there is a construct or the like, or where an operator or the like is located. It is necessary to carry out the confirmation of the object and personal safety.

As described above, it is necessary to display the rear view image on the monitor 12 at the time of turning and traveling during the step before entering the work such as excavation and the like, and at the time of turning and running before moving to the execution. Even if the rear view image is projected on the monitor 12 after the revolving body 2 starts to rotate and after the start of traveling, the risk may not be avoided.

As described above, the operator always grips the work levers 6 and 7 during the operation, and releasing the hands from the work levers 6 and 7 is the same as when operating the operation levers 8a and 8b for traveling. And other switches, for example, a wiper switch, an illumination light switch, an engine variable speed dial, and the like. During operation, since the compound operation for simultaneously turning the front work machine 3 and the upper swinging structure 2 is performed, the driving is mainly performed by the operation pedals 9a and 9b and not by the operation levers 8a and 8b. In general, even when the operation levers 8a and 8b are operated, the two operation levers 8a and 8b are operated by one hand, and the other hand is also operated by the operation lever 6 or 7. Hold your hand.

Therefore, at least one of the work levers 6 and 7 is provided with the changeover switch 16, and the operation of the changeover switch 16 switches the image on the monitor 12. The switching of the image is limited to the vehicle status information display image and the rear view image, so that the vehicle 12 can be moved to the monitor 12 at the time of reversing and turning the vehicle that needs to obtain the rear view, and before starting such operation. When the situation information is displayed, the operator can switch smoothly and easily to the rear view image, which is very desirable for ensuring safety. When the necessity of the rear view disappears, that is, at the time of turning or reversing or after that, the switch 12 is operated again so that the monitor 12 displays the vehicle status information.

And it is reasonable to install in the work lever 6 which includes turning operation about which switch switch 16 is installed among the two work levers 6 and 7 provided, and the work lever 6 Considering the case where operation of the operation levers 8a and 8b is performed by the hand holding), the changeover switch 16 may be provided on both of the two operation levers 6 and 7.

Since the present invention is configured as described above, the operability of the operation of switching to the rear view image of the monitor screen becomes very good for the operator of the construction machine, and the image can be switched smoothly, reliably and easily at the required timing. Effect can be obtained.

Claims (3)

The upper swing structure rotatably provided on the lower traveling body is provided with an engine, a hydraulic pump driven by the engine, and a plurality of operating parts driven by pressure oil supplied from the hydraulic pump. And a camera for detecting at least the remaining amount of fuel supplied to the engine, the engine cooling water temperature, and the operating oil temperature, and a camera for monitoring the periphery of the machine is provided, and the rear view image obtained from the camera is converted into another image. In a construction machine in which a monitor that is displayed switchable is installed in a cab, The rear view image and other images displayed switchably include a plurality of images including a vehicle situation information image and an image other than the vehicle situation information image, based on detection information of each of the sensors, And a selection switch group composed of a plurality of switches for selecting the display image of the monitor, In the cab, the rear view image or the vehicle status information is provided on the work lever for performing a swing operation of the upper swing body, provided at both sleeve portions on the left and right sides of the driver's seat, and by the selection switch. When the image is to be displayed, a switch is provided to switch the image display of the monitor between the rear view image and the vehicle situation information image. Display of construction machinery. The method of claim 1, The plurality of selection switches are provided in a frame portion of the monitor. When the selection switches are operated, an image selected by the selection switch is displayed on the monitor, and when a desired image is not selected by the selection switch. The vehicle situation information image is displayed as a basic image, and the control device which controls so that the said vehicle situation information image and the said rear view image can be switched to the said monitor by operation of the said switch is comprised so that it may be connected to the said monitor. , Display device of construction machinery. The method of claim 1, The work lever in which the changeover switch is installed is a work lever for at least a work lever for performing swing operation of the upper swing body.

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