JPH018639Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a driver's seat for a pit excavator, and in particular, to a boom and/or arm that is attached to the front part of the vehicle body of a hydraulic excavator so that it can be lifted up and down. This device allows the driver to easily directly view the bottom of the hole, the side walls of the hole, etc. from the driver's seat of the shaft drilling machine equipped with a shaft drilling attachment consisting of a telescopic extension arm or a multistage telescopic arm.

Conventionally, the driver's seat of this type of excavator is fixed to the front of the vehicle body, and when drilling a deep hole, the operator looks into the hole from diagonally above the hole. Walls and hole bottoms that exceed a certain limit become the driver's blind spot and cannot be seen from the driver's seat, so the reality is that the driver relies on intuition or uses signals from an assistant to excavate, resulting in poor excavation efficiency. However, the excavation situation could not be grasped without delay, resulting in danger and other problems.

For this reason, attempts were made to install a mirror in front of the driver's seat and look into the hole through the mirror, but in this case, although it was possible to see inside the hole locally, it was not possible to see the entire hole, so the field of view The area was narrow, and there were also problems such as the operation being reflected in the opposite direction, making it unsatisfactory for driving operation.

This idea was made in view of the above,
The driver's seat in a pit excavator is equipped with an attachment for pit excavation via a boom and/or arm that looks up and down in the front part of the excavator's body, and slides onto a fixed frame fixed to the upper revolving body of the excavator. The driver's seat is movably supported via a movable frame that is fitted into the vehicle body, and only the driver's seat is movably supported so that it can extend outside the lower vehicle body, so that the inside of the hole can be seen sufficiently from the driver's seat.

Hereinafter, an explanation will be given of an embodiment in which the present invention is applied to a hydraulic excavator.

1 is the lower traveling body of the vehicle body, 2 is the upper rotating body that is rotatably mounted on the lower traveling body 1, and 3 is a boom that is pivotally supported on the front part of the upper rotating body so that it can be lifted up and down, and the tip of the boom is A shaft drilling attachment is rotatably supported by a cylinder 7. The above-mentioned shaft drilling attachment has a structure in which an excavating bucket 5 is attached to the tip of the inner arm 4 of a multi-stage telescopic arm 4 into which an outer arm 4', a middle arm 4'', and an inner arm 4 are sequentially fitted and extendable. It is made up of

8 is movably supported in front of the revolving upper structure 2 at the driver's seat by a fixed frame 9 fixed to the revolving upper structure 2 and a movable frame 10 slidably fitted into the frame 9.

A seat 11 and operating levers 12, 12'... are attached to the movable frame 10, and operating rods 13 of variable length are fitted into the operating levers 12, 12', respectively, and can be fixed at desired positions. ,1
4, 13', 14'... are connected. 15,1
5' is a guide roller attached to the fixed frame.
A movable frame 10 is mounted on the movable frame 10, rollers 16 and 16' are mounted on the movable frame 10, and the movable frame 10 can be moved back and forth within the fixed frame 9, and can be moved to any position using fixing bolts 17. is locked. 18 is the frame 9, 10
A fixing bolt 17 insertion hole drilled at a predetermined position, 1
9 is a drilled hole.

In addition, the operating rods 12, 13, 12', 13', whose lengths can be changed according to the movement of the driver's seat 8 in and out, are also equipped with operating valves on the driver's seat 8 , and hydraulic piping is used instead of the operating rods. It goes without saying that changes can be made within a range that does not deviate from the above.

This idea has the structure as described above, with a deep pit 1
9, when the hole reaches a predetermined depth, the side walls of the excavator of the hole 19 and the The bottom of the hole becomes the driver's blind spot and cannot be seen from the driver's seat, but according to this invention, only the driver's seat extends to the front of the vehicle, that is, to the top of the excavated hole, so the entire hole can be seen from the driver's seat. Therefore, the driver can dig while checking the grain condition of the hole or the excavation status, etc., and since only the driver's seat extends forward, there is almost no increase in the turning moment, making it quick and safe. It is possible to excavate a pit.

In addition, when excavating a shallow hole or near the excavator, the driver's seat can be retracted onto the upper revolving structure and excavation work can be carried out in the same way as with conventional equipment, so the driver's seat does not get in the way. have

[Brief explanation of drawings]

Fig. 1 is an overall side view of the present invention, Fig. 2 is a plan view of the driver's seat of the present invention, Fig. 3 is a side view of the same, Fig. 4 is a, and b are lines A to B of Fig. 3, respectively. FIG. 5 is an enlarged sectional view taken along the line .about.-, and FIG. 5 is a side view showing the driver's seat retracted state of the conventional device and the present invention. 2... Upper revolving body, 3... Boom, 4... Multi-stage telescopic arm of shaft drilling attachment, 8 ...
Driver's seat, 9...fixed frame, 10...movable frame.

Claims (1)

[Scope of utility model registration request] The driver's seat of a vertical hole excavator, in which a vertical hole drilling attachment is attached to the front part of the excavator's body via a boom and/or arm that looks upwards and downwards, is slid onto a fixed frame fixed to the upper revolving structure of the vehicle body. A driver's seat structure for a pit excavator, characterized in that the driver's seat is movably supported via a movable frame that is movably fitted, and that only the driver's seat is movably supported so that it can extend outside the lower traveling body of the vehicle body.