JPH0542126Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to the arrangement of control levers, travel pedals, etc. in the driver's cab of construction machinery.

BACKGROUND ART The operator's cab of a hydraulic excavator has a control lever for operating work attachments and a travel lever for traveling, and the arrangement of these levers varies depending on the model. For example, in a small hydraulic excavator, as shown in FIG. There is a travel lever 15 that projects upward. Further, in front of the driver's seat 13, a pair of left and right stands 16 are protruded at separate positions on both sides of the travel pedal 14, and an operating lever 17 for operating a work attachment is protruded from the upper part of the stands 16. ing.

In the case of large machines, it is slightly different from the above, as shown in Figure 3.
As shown in FIG. 4, there is an instrument panel 19 on the left and right in front of the driver's seat 18, and on the upper front surface of the instrument panel 19 is an operating lever 20 for operating work attachments.
Behind the right operating lever 20, a pair of travel levers 21 on the left and right sides are installed extremely close to each other.

In the case of the former, that is, in the case of a small machine, the driver grasps the front left and right operation levers 17 and operates the work attachments to perform excavation work, and when moving during work, the driver operates the front travel pedal 14 with both feet. to move the aircraft. When moving on the road after finishing work, the vehicle is operated by holding the travel lever 15 with both hands.

In the latter case, that is, in the case of a large machine, the driver holds the left and right operation levers 20 and operates the work attachment to perform excavation work.If the machine is to be moved, it is necessary to move the machine both during the work and after the work is finished. When traveling, both hands hold and operate the travel lever 21 on the right front.

Problems to be solved by this invention As mentioned above, the arrangement of the control lever and the travel lever in front of the driver differs depending on the model, but in the case of a small machine as shown in Fig. Since there is a lever 15, and there are operating levers 17 and stands 16 on the left and right sides of the lever 15, visibility of the lower front part is poor. With hydraulic excavators, most of the work involves digging into the ground, so the presence of the stand 16 for the travel lever 15 and the operating lever 17 in a position where the driver can see through the lower part of the front impairs the driver's field of vision. This made it difficult to perform the work, which in turn led to a decline in work efficiency. In the case of the large models shown in FIGS. 3 and 4, there is nothing obstructing the field of view in front of the vehicle, and in this case, there is only one system of travel control device. That is, there is no equivalent to the travel pedal 14 in the case of a large model. Therefore, when performing a traveling operation, the traveling lever 21 located on the instrument panel 19 on the right side of the driver's seat 18 must be operated. Since the traveling lever 21 is operated by holding it, when operating the traveling lever 21, it is impossible to operate the operating lever 20 for operating the work attachment. For this reason, it has been difficult to perform a combined operation of traveling and working attachments, such as lifting the bucket while traveling. This gave the impression that large models were less flexible than smaller models, and was also a factor that actually reduced work efficiency. In addition, when traveling long distances on the road, the driver must always use the right hand drive lever 2.
1, and it would be much easier if you could operate it with your feet like in the case of small models.

The object of the present invention is to solve the above-mentioned problems and provide an operating device that improves the forward field of view and allows multiple operations.

Means for solving the problem (a) In a construction machine in which the driver's cab is equipped with a driver's seat and an instrument panel on the right side of the driver's seat, and control levers for operating work attachments are installed on both sides of the front of the driver's seat, (b) To ensure visibility of the front lower part of the seat,
A travel lever for travel operation is installed on the instrument panel on the right side of the driver's seat, and a travel pedal having the same function as the travel lever is installed at the front lower part of the driver's seat.

Function: In front of the driver's seat, there is only a driving pedal at the bottom, so there is a good view forward and downward, making work easier and improving work efficiency. When traveling for a long time, operate the travel pedal, and when loading or unloading onto a trailer or moving in a narrow space, use the travel lever to make delicate movements, allowing for precise movement. Compound operations can be performed by operating the pedals at the same time, making work easier and improving work efficiency.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

1 is the driver's seat of a hydraulic excavator;
has a backrest 2 at the rear, armrests 3 are installed on both left and right sides, and a stand 5 is provided in front of the armrests 3 in a state that projects diagonally upward from the base 4 of the driver's seat 1, An operating lever 6 for operating the work attachment is installed on the top of the stand 5.
Although the top surface of the stand 5 is located at a slightly lower position than the upper surface of the armrest 3, the operating lever 6 is located at a considerably higher position, so that the driver can grasp the operating lever 6 while placing his arm on the armrest 3. I have to. 7
is an instrument panel, which is installed adjacent to stand 5 on the right side of driver's seat 1. A travel lever 8 is installed at a position in the middle of the instrument panel 7, behind the operating lever 6, and in contact with the front side of the armrest 3. The travel lever 8
There are two pairs of left and right arms in close proximity to each other, and the upper part of the armrests is slightly higher than the armrests 3, so that they can be operated even when the arms are placed on the armrests 3. Reference numeral 8 denotes a driving pedal, which is installed on the floor 10 at the front lower part of the driver's seat 1. There are a pair of travel pedals 9 on the left and right, which correspond to the travel levers 8 provided on the instrument panel 7. During travel, the vehicle can be operated by operating either the travel levers 8 or the travel pedals 9. Note that 11 is a driver's cab.

The present invention is constructed as described above, and the excavation work using the work attachment is performed by holding the operating levers 6 on both sides of the front of the driver's seat 1. The operating lever 6 is located in front of the armrest 3 of the driver's seat 1,
When the driver places his elbow on the armrest 3, his hand is placed exactly at the position of the control lever 6, so the driver can comfortably press the control lever while keeping his elbow on the armrest 3. 6 can be operated. Excavation work using a work attachment is performed continuously, but the machine body may be moved back and forth or the excavation position may be changed during the work. In such a case, the driver moves by operating the pedal 9 located below the front of the driver's seat 1 with both feet. Of course, you can also move by operating the travel lever 8 on the right side, but in that case, you must let go of the operating lever 6 and switch to the travel lever 8, and you must move while operating the work attachment. This operation is difficult. However, when moving in a narrow space, it may be difficult to move the aircraft according to the driver's will by operating the pedal 9. In such a case, by switching from the operating lever 6 to the travel lever 8 and performing the travel operation even during work, it is possible to perform more delicate operations than with the foot operation of the travel pedal 9, and more accurate movement is possible.

Of course, when moving long distances after finishing work,
There is no need to operate work attachments,
There is no need to hold the operating lever 6, just operate the travel pedal 9 with your foot, but when turning right or left, or passing through a narrow space, you can perform delicate operations by holding the travel lever 8. You can drive safely and accurately. Furthermore, when loading or unloading the aircraft onto a trailer for long-distance movement, it is dangerous unless the aircraft is moved accurately. Even in such a case, operating the travel pedal 9 with the foot does not allow delicate operations such as manual operation. Therefore, in such a case, by holding and operating the travel lever 8, the vehicle will move as the driver intends.
Capable of delicate movements and safe and accurate loading and unloading.

Effects of the invention As mentioned above, this invention places the operation levers for the work attachments on both sides of the front of the driver's seat, the travel pedals at the lower front, and the travel levers on the instrument panel on the right side. In particular, the front and lower field of vision is improved, making work easier, and
When driving, it can be operated with either the travel pedal or the travel lever, making it easier to travel for long periods of time, and safely and accurately even in tight spaces or when delicate operations are required, such as when loading or unloading a trailer. In addition, it is possible to move the machine while operating the work attachments, which is what is called combined operation, which is convenient and improves work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a front view of the present invention, Fig. 2 is a plan view, Fig. 3 is a front view of the conventional one, Fig. 4 is a plan view, and Fig. 5 is a perspective view of another conventional example. It is. 1... Driver's seat, 6... Operation lever, 7... Instrument panel, 8... Travel lever, 9... Travel pedal, 11
...driver's room.

Claims (1)

[Scope of utility model registration request] The driver's seat of construction machinery is equipped with a driver's seat and an instrument panel on the right side of the driver's seat, and control levers for operating work attachments are installed on both sides of the front of the driver's seat to ensure visibility of the lower part in front of the driver's seat. A control lever for construction machinery, characterized in that a travel lever for travel operation is installed on the instrument panel on the right side of the driver's seat, and a travel pedal having the same function as the travel lever is installed at the front lower part of the driver's seat. .