JP2003321852A - Malfunction prevention indicator of construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To immediately make an operator aware of a lock-off state and prevent the operator from carelessly and continuously moving the actuation section when an operation lever is in a lock-off condition, although a problem that when the operator touches the operation lever by mistake for inputting from an input device in the case of the lock-off condition, the actuation section moves in itself, if the operator is aware of the movement of the actuation section, he immediately operates a hydraulic lock lever and makes the operation lever into a lock condition and he can stop the succeeding malfunction, but he notices at many times the neighborhood of the input device when operating the input device, and hence he is not aware of the lock-off condition, thereafter, he touches the operation lever also, hence, the maloperation condition continues, exists. <P>SOLUTION: An indication device 1 is arranged in the cab of a construction machine. In the indication device 1, a lighting control is put into practice when an input signal has been output from an input means 4 of a control appliance system, in the case that the operation lever 2 is in the lock-off condition. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for preventing an operating portion of a construction machine from malfunctioning.

[0002]

2. Description of the Related Art FIG. 1 shows a structure inside a cab of a hydraulic excavator which is a typical construction machine. In the figure, 2 is an operation lever, 3 is a hydraulic lock lever that shuts off input from the operation lever, 4 is an input device of a control device system (here, a hydraulic device controller is assumed), and 5 is a display means.

The input device 4 is provided with an input means such as a keypad and a panel button for setting a hydraulic output, and as shown in the figure, the input device 4 is provided with input from the input device 4 in the vicinity thereof. Display means 5 for outputting the input result is arranged. This display means 5 is often arranged on the front side of the driver's seat, that is, on the front side of either side of the operating levers 2 on the left and right of the driver's seat, in order to make it easy for the operator to see, and the position of the input device 4 is inevitably inevitable. Is also in the vicinity thereof (in the figure, the input device 4 is located below the display means 5).

[0004]

By the way, for example, in order to set the output of the control device system, when reaching out to input a set value from the input device 4, the operation lever 2 is arranged in front of the input device 4. I often come into contact with it because it is present. At that time, if the operation lever 2 is in the locked state (that is, the lock-on state by the hydraulic lock lever 3), there is no problem because the input from the operation lever is blocked, but it is in the lock-off state. And an operation part (for example, a front structure) according to the movement of the operation lever 2.
Will move without permission. At this time, if the operator notices the movement of the operating part, immediately the hydraulic lock lever
By operating 3 to lock the operating lever 2, it is possible to stop subsequent malfunctions.
In many cases, the user is gazing at the vicinity of the input device during the operation of, and therefore, there is a problem that the lock-off state is not noticed and the operation lever 2 is touched thereafter and the malfunction state continues.

The present invention was devised in view of the above problems of the prior art. When the operating lever is in the lock-off state, the operator is made to immediately notice the lock-off state and carelessly moves the operating part. It seeks to provide technology that prevents them from continuing to move.

[0006]

Therefore, the present invention is a display device arranged in a cab of a construction machine, wherein an input signal from an input means of a control equipment system is generated when an operation lever is in a lock-off state. A display device for preventing malfunction of a construction machine, wherein lighting control is performed when the output is made.

In the state where the operation lever is in the lock-off state, for example, when the operator tries to input the hydraulic output from the input means of the control device system, he / she touches the operation lever by mistake and touches it. When it is moved, the operating part malfunctions according to the lever operation. At this time,
If the operator notices the malfunction, he may perform the lock operation, but even if he does not notice it, if the input operation is performed from the input device, an input signal will be output, so that the display device in the cab lights up. Then the operator
By the lighting, it is possible to notice that the operation lever is in the lock-off state, and to immediately set the lock state.
Therefore, when the input operation is continued thereafter, even if the operation lever is touched, the operation unit controlled by the operation lever is prevented from being inadvertently operated.

[0008] Such a display device, when the operator in the driver's seat looks at the input device, if the display device is arranged in a range within the field of view, the operator will surely notice the lighting. For this reason, the display device is preferably arranged within such a field of view. For example, if the input device is near the input device, the input device is surely seen during the input operation, which is a very preferable mode.
Further, even if it is attached to the operation lever itself, it is easy to notice when touching it, so that it is also a suitable form.

Further, even when the display device is placed outside such a field of view, the display device is extremely brightly lit so as to blink, the lighting color is made to be a conspicuous color, or a voice message is also added. As long as the operator can clearly recognize the lock-off state, for example, by putting it out, the display device may be arranged at any place in the cab.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A specific embodiment of the present invention will be described. This example is premised on the cab of the hydraulic excavator shown in FIG. 1, and the devices denoted by the reference numerals are the same as those described above. It should be noted that the following form examples are merely examples, and the present invention is not limited to the form examples.

In this embodiment, the malfunction preventing display lamp 1 is arranged in the display means 5 which shows the input result from the input device 4. The malfunction prevention display lamp 1 is covered with a red translucent plate that says "Please lock the hydraulic pressure" and functions as a warning message when it is turned on. The lighting of the lamp 1 is controlled by the CPU of the controller 6. This control system will be described with reference to FIG. 2. The CPU receives both the signal of the on / off state of the hydraulic lock lever 3 and the input signal of the input device 4, and the CPU of the hydraulic lock lever 3 receives the input signal. When a lock-off signal is input and an input signal is input from the input device 4, a lighting-on signal is output to the lamp 1.

Due to such a control system, if the lock by the hydraulic lock lever 3 is released when the button of the input device 4 is operated, the malfunction preventing display lamp in the tip of the operator's line of sight 1 will light up. Therefore, the operator immediately notices that it is in the lock-off state, turns on the hydraulic lock lever 3 and restricts the control of the operation lever 2, and then even if the operation lever 2 is accidentally touched, the operating part is It effectively prevents malfunction of the arm (for example, arm or bucket).

In the above embodiment, the display lamp 1 provided in a part of the display means 5 is turned on, but the background itself of the screen of the display means 5 is made to blink to display The entire screen of the means 5 may function as a malfunction prevention display. In this way, the display means 5 is a place that the operator always looks at during the input operation, so if the malfunction preventing display means is provided in the vicinity thereof, the operator will definitely notice the display.

[0014]

As described above, according to the display device of the present invention, when the operation lever is in the lock-off state,
Even if you accidentally touch the operation lever and the operation part moves carelessly when trying to input from the input means of the control equipment system,
The operator will immediately notice the malfunction. For this reason, the operator can immediately release the state, and thus the malfunction after that can be effectively prevented.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of a device arrangement configuration in a cab of a hydraulic excavator, and also shows a state in which an indicator lamp according to the present embodiment example is arranged.

FIG. 2 is an explanatory diagram showing a display lamp lighting control system according to the present embodiment.

[Explanation of symbols]

1 Malfunction prevention indicator lamp 2 Operation lever 3 Hydraulic lock lever 4 Input device 5 Display means 6 controller

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Satoshi Fujii             4-10-1 Yoga, Setagaya-ku, Tokyo New Ki             Within Mitsubishi Corporation (72) Inventor Isao Murota             4-10-1 Yoga, Setagaya-ku, Tokyo New Ki             Within Mitsubishi Corporation F-term (reference) 2D015 GA03 GB01 HA03                 3J070 AA03 AA07 BA03 BA32 BA33                       BA45 BA46 BA51 CE01 DA21

Claims (2)

[Claims] 1. A display device arranged in a cab of a construction machine, wherein lighting control is performed when an input signal is output from an input means of a control device system when an operation lever is in a lock-off state. A display device for preventing malfunction of a construction machine, which is characterized in that 2. The display device for preventing malfunction of a construction machine according to claim 1, wherein the display device is arranged near the input means.