JP2000163145A - Wiper operation device for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To operate a wiper by the necessary number of times without releasing a hand from an operation lever and without moving eyes from a work machine by operating the wiper with the change-over of a switch installed in the operation knob of the operation lever. SOLUTION: A signal line 9 connecting the collector C of a transistor 6 and a wiper driving circuit 10 is divided into two and a first switch is arranged on the top 22 of the operation knob 21 of the operation lever 20 in a work machine installed in a construction machine. The + side contact point 24 of a first switch 23 is connected to the branch line of the signal line 9 and a -side contact point 25 is grounded. Since the first switch 23 is arranged on the top 22 of the operation knob 21 of the operation lever 20 and an operation is easy, a wiper 3 can be operated by the necessary number of times without releasing a hand from the operation lever 20 at every time and without moving the eyes from the work machine in a construction site where a front window 2 is often watered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper operating device for a construction machine, and more particularly to a wiper operating device for a construction machine having an operation lever provided with a switch for switching the operation / stop of a wiper.

[0002]

2. Description of the Related Art In general, as construction machines, there are provided a work machine having an excavating bucket attached to the end of a boom and a lower frame having an excavating blade attached to a lower frame. In this type of construction machine, work is performed by operating the operation lever installed in the cabin while monitoring the position of the work machine through the front window from inside the cabin, and it is arranged around the operator during rainy weather Activate the wiper with the wiper switch to secure the field of view necessary for the work.

FIG. 3 shows a conventional wiper operating device 1 for a construction machine.

In FIG. 1, reference numeral 2 denotes a front window of a cabin of a construction machine, 3 denotes a wiper, 4 denotes a wiper drive motor for operating the wiper 3, and when the wiper drive motor 4 is driven, the front window 2 The wiper 3 reciprocates along, and water droplets, mud, and mud adhering to the front window 2 are wiped off.

[0005] A switch panel 5 includes a switch panel control circuit 7 and a wiper switch 8. A signal is input to the switch panel control circuit 7 by the wiper switch 8. The switch panel control circuit 7 is connected to the wiper drive circuit 10 via the transistor 6 and the signal line 9 and calculates each time the wiper switch 8 is pressed. It is configured to output to the wiper drive circuit 10 via the control unit.

Here, the switch panel control circuit 7
When the wiper switch 8 is pressed once, the switch panel output is regarded as a continuous operation command, the switch panel output is held at ground, and then when the wiper switch 8 is pressed, the switch panel output is regarded as intermittent operation, and the switch panel output is deemed to be at a certain interval. And when the wiper switch 8 is pressed, it is regarded as a stop command and the output circuit of the switch panel 5 is disconnected from the ground. When the wiper switch 8 is pressed, the operation returns to continuous operation. It is configured as follows.

As described above, in the conventional wiper operating device 1 for construction equipment, the mode of the wiper 3 is switched to any one of the continuous operation mode, the intermittent operation mode, and the stop mode by cyclically switching one wiper switch 8, and water droplets are formed. Wipe off mud, muddy water and other deposits. Of course, the wiper can be switched by three switches. Since the wiper drive circuit 10 and the wiper drive motor 4 are provided with an automatic return circuit for the wiper 3, even if the switch panel output is turned off during the operation of the wiper 3, the operation of the wiper drive circuit 10 and the wiper drive motor 4 is not performed. Continue until you reach the position.

[0008]

As described above, the operation modes of the wiper operating device 1 include the wiper continuous operation mode, the intermittent operation mode, and the stop mode. It is configured to select the mode. However, occasionally, water or muddy water adheres to the front window 2 when the weather is unstable, such as light rain, or when jumping or fountains are being constructed near rivers. In such a case, it is necessary to release the hand from the operating lever for operating the work equipment such as the bucket arm, and to operate the wiper 3 by the wiper switch 8 provided in a console box or the like. , I have to interrupt my work.

Therefore, in the construction machine, there arises a technical problem to be solved in order to operate the wiper without releasing the working machine from the operating lever, and the present invention aims to solve the problem. I do.

[0010]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above object, and an operation lever installed in a cabin while monitoring the position of a working machine through a front window from inside the cabin. The construction machine is configured to operate the work machine by operating the switch and to operate the wiper by switching the switch to clean the front window, wherein the switch is installed on the operation knob of the operation lever, and the operation lever is operated. The present invention provides a wiper operating device for a construction machine configured to wipe off attached matter such as rainwater, water droplets, mud, muddy water, etc. attached to the front window by operating the switch while operating.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. The same components as in the prior art are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 1, a signal line 9 connecting the collector C of the transistor 6 and the wiper drive circuit 10 is bifurcated, while a working machine (not shown) installed in a construction machine A first switch 23 is disposed on a top surface 22 of an operation knob 21 of the operation lever 20 of the first embodiment, and a positive contact 24 of the first switch 23 is connected to a branch line 25 of the signal line 9, and a negative contact 26 is grounded.

The first switch 23 comprises an alternate switch or a momentary switch. First
When the switch 23 is constituted by an alternate switch, when the switch is pressed once, the wiper 2 makes one reciprocation. When the switch 23 is constituted by an alternate switch, the switch 23 is operated once when the switch is pressed once, and is stopped when pressed again.

In any type of switch, the operation lever 20
Since the operation knob 21 is installed on the top surface 22 of the operation knob 21 and is easy to operate, occasionally, at a construction site where the front window 2 is exposed to water, without releasing the hand from the operation lever 20 each time, It is possible to operate the wiper 3 a required number of times without keeping an eye on a working machine such as an arm. For this reason, workability and safety are improved as much as possible as compared with conventional construction machines.

FIG. 2 shows an example in which a switch for operating a washer pump is provided on the operation lever 20 in addition to the first switch 23. In the figure, the wiper operating circuit 1 is omitted for easy understanding.

In FIG. 2, reference numeral 30 denotes a washer liquid pressure pump for pumping the washer liquid.
A switch panel 31 is provided separately from the switch panel 5, and is configured to input a switching signal of a switch 32 to a switch panel control circuit 33.
It is electrically connected to a washer hydraulic pump driving circuit 37 via a transistor 34 and a signal line 36.

Each time the switch 32 is pressed, the switch panel control circuit 33 performs a calculation and outputs a corresponding signal to the washer hydraulic pressure pump drive circuit 37. The washer hydraulic pressure pump drive circuit 37 includes a switch panel control circuit. In response to the signal 33, the washer hydraulic pump 30 is operated or stopped.

Here, the switch panel control circuit 33
The switch panel output is kept grounded only while the switch 32 is pressed, and the washer hydraulic pump 30 is operated.

On the other hand, a second switch 38 is disposed on the front upper portion of the operation knob 21 of the operation lever 20, and the + terminal 39 of the second switch 38 is connected to the transistor 34.
Is connected to a signal line 36 which is branched from a signal line 35 connecting the collector C and the washer liquid pressure pump drive circuit 37, and the negative terminal 41 is connected to the ground. The second switch 38 comprises an alternate switch or a momentary switch. Therefore, when the second switch 38 is an alternate switch, when the switch is pressed once, the washer fluid pressure pump 30 draws out one washer fluid from the tank 42 and sprays the same on the front window 2. And continuously spray washer fluid. For this reason, the front window 2
The mud or muddy water adhering to the work lever can be wiped off without releasing the hand from the operation lever 20 and without taking an eye from the working machine, and the work can be continued without interruption.

A push switch (not shown) is mounted on an operation knob of another operation lever (not shown) near the operation lever 20, and the first switch 23 and the second switch are operated by the push switch. 38, it is possible to provide an electric circuit for validating or invalidating the operation of the first switch 23 and the second switch 3
The erroneous operation of the wiper 3 and the water pump 30 due to the erroneous switching of No. 8 can be prohibited.

As described above, the present invention can be variously modified without altering the spirit of the present invention, and the present invention naturally extends to the modified ones.

[0022]

As described in detail in the above embodiment, the present invention operates a wiper by switching a switch installed on an operation knob of an operation lever, thereby operating the wiper to prevent water droplets and rainwater adhering to a front window of a construction machine. It is configured to wipe off deposits such as mud. For this reason, occasionally, at construction sites where the front window is exposed to water or unstable weather, without releasing the operating lever each time,
It is possible to operate the wiper as many times as necessary without taking your eyes off the work machine, and it is possible to prevent interruption of work due to the attachment of the front window. .

[Brief description of the drawings]

FIG. 1 is a block diagram of a wiper operating device of a construction machine according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an embodiment of the present invention and further showing an example in which an operating device of a washer pump is incorporated.

FIG. 3 is a block diagram of a conventional wiper operating device of a construction machine.

[Explanation of symbols]

 2 Front window 3 Wiper 20 Operation lever 21 Operation knob 23 First switch (switch)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D003 EA00 2D015 EB01 3D025 AA01 AB09 AC01 AC02 AD02 AE02 AF02 AF07 AG06 AG51 AG77 3J070 AA03 BA31 CA43 CC71 DA21 EA01

Claims (1)

[Claims] 1. A work machine is operated by operating an operation lever installed in the cabin while monitoring a position of the work machine through a front window from inside the cabin, and a wiper is operated by switching a switch to operate the front machine. In a construction machine configured to clean a window, the switch is installed on an operation knob of the operation lever, and the switch is switched while operating the operation lever to rain water, water droplets, and mud attached to the front window. A wiper operating device for a construction machine, which is configured to wipe off deposits such as muddy water.