Excavating – Ditcher – Condition responsive
Reexamination Certificate
1998-04-10
2001-04-03
Batson, Victor (Department: 3671)
Excavating
Ditcher
Condition responsive
C701S050000
Reexamination Certificate
active
06209232
ABSTRACT:
TECHNICAL FIELD
This invention relates to a construction machine with a laser measuring instrument, and more particularly to a construction machine with a laser measuring instrument suitable for use for measurement of a finished floor face.
BACKGROUND ART
Conventionally, as shown in
FIG. 8. a
construction machine (working machine)
115
such as a hydraulic excavator includes a lower traveling member
100
including a right track
100
R and a left track
100
L which can be driven independently of each other, and a working machine body section (working machine body)
102
with an operator cab
101
mounted for rotation in a horizontal plane on the lower traveling member
100
. Further, a boom
103
is mounted for pivotal motion in a vertical direction on the working machine body section
102
, and a stick
104
is mounted for pivotal motion similarly in a vertical direction on the boom
103
.
A pair of boom driving hydraulic cylinder apparatus (liquid pressure cylinder apparatus)
105
(only one is shown in
FIG. 8
) for driving the boom
103
are provided in a juxtaposed relationship between the working machine body section
102
and the boom
103
, and a stick driving hydraulic cylinder apparatus (liquid pressure cylinder apparatus)
106
for driving the stick
104
is provided between the boom
103
and the stick
104
.
It is to be noted that a bucket
108
which is driven by a hydraulic cylinder apparatus
107
is removably mounted at an end of the stick
104
.
Further, the left track
100
L and the right track
100
R mentioned above include traveling motors
109
L and
109
R (refer to
FIG. 10
) serving as power sources independent of each other, respectively, and a revolving movement by the working machine body section
102
, a pivotal movement by the boom
103
and the stick
104
and driving of the bucket
108
are operated under the control of a hydraulic control circuit apparatus
111
hereinafter described with reference to
FIG. 10
as a hydraulic pump is driven by an engine (internal combustion engine) not shown.
By the way, the operator cab
101
is constructed in such a manner as shown, for example, in FIG.
9
. The operator cab
101
includes a seat
101
A on which an operator is to be seated, a left lever
101
B, a right lever
101
C, a console
101
D, a left pedal
101
L, a right pedal
101
R, an instrument panel
101
E and a safety lock lever
101
F.
Here, the left lever
101
B, right lever
101
C, left pedal
101
L and right pedal
101
R mentioned above are provided to control movements of the working machine
115
(traveling, revolving movement, pivotal movement of the boom, pivotal movement of the stick or pivotal movement of the bucket).
For example, if an operator manually operates the left and right levers
101
B and
101
C forwardly or rearwardly and leftwardly or rightwardly, then the hydraulic cylinder apparatus
105
to
110
are driven under the control of the hydraulic control circuit apparatus
111
so that a revolving movement, a pivotal movement of the boom, a pivotal movement of the stick or a pivotal movement of the bucket can be performed.
In the meantime, if the left pedal
101
L is treadled down, then the amount of the treadling movement is transmitted to the left side traveling motor
109
L via the hydraulic control circuit apparatus
111
to drive the left track
100
L to rotate, but if the right pedal
101
R is treadled down, then the amount of the treadling movement is transmitted to the right track
100
R via the hydraulic control circuit apparatus
111
to drive the right track
100
R to rotate so that the working machine
115
can travel (travel straightforwardly, travel along a leftwardly or rightwardly curved line or turn backwardly).
For example, if both of the right track
100
R and the left track
100
L are rotated at an equal speed in a forward direction, then the working machine
115
advances straightforwardly, but if the left track
100
L is rotated at a higher speed than the right track
100
R, then the working machine
115
advances along a leftwardly curved line. However, if the right track
100
R is rotated at a higher speed than the left track
100
L, then the working machine
115
advances along a rightwardly curved line, but if both of the right track
100
R and the left track
100
L are rotated at an equal speed in a reverse direction, then the working machine
115
can travel backwardly.
It is to be noted that the aforementioned revolving movement signifies a rotational movement of the working machine body section
102
by a revolving motor
110
which is hereinafter described with reference to FIG.
10
.
By the way, the hydraulic control circuit apparatus
111
mentioned above includes, as shown in
FIG. 10
, hydraulic control valves
111
-
1
to
111
-
6
for transmitting control amounts to the hydraulic cylinder apparatus
105
to
107
, traveling motors
109
L and
109
R and revolving motor
110
, respectively.
The control valve
111
-
1
is switched by a pilot hydraulic pressure received from the right lever
101
C via a pilot oil path
112
-
1
to control the hydraulic pressure of the boom driving hydraulic cylinder apparatus
105
via an oil path
113
-
1
to drive the boom driving hydraulic cylinder apparatus
105
to extend or contract to drive the boom
103
.
Similarly, the control valve
111
-
2
is switched by a pilot hydraulic pressure received from the right lever
101
C via a pilot oil path
112
-
2
to control the hydraulic pressure acting upon the hydraulic cylinder apparatus
107
via an oil path
113
-
2
to drive the hydraulic cylinder apparatus
107
to extend or contract to drive the bucket
108
.
Meanwhile, the control valve
111
-
3
receives a pilot hydraulic pressure from the left pedal
101
L via a pilot oil path
112
-
3
to control the hydraulic pressure at the left side traveling motor
109
L through an oil path
113
-
3
to drive the left track
100
L to rotate.
Similarly, the control valve
111
-
4
receives a pilot hydraulic pressure from the right pedal
101
R via a pilot oil path
112
-
4
to control the hydraulic pressure at the right side traveling motor
109
R via an oil path
113
-
4
to drive the right track
100
R to rotate.
Further, the control valve
111
-
5
receives a pilot hydraulic pressure from the left lever
101
B through a pilot oil path
112
-
5
to control the hydraulic pressure at the revolving motor
110
via an oil path
113
-
5
to drive the working machine body section
102
to rotate.
Meanwhile, the control valve
111
-
6
is switched by a pilot hydraulic pressure received from the left lever
101
B via a pilot oil path
112
-
6
to control the hydraulic pressure acting upon the stick driving hydraulic cylinder apparatus
106
via an oil path
113
-
6
to drive the stick driving hydraulic cylinder apparatus
106
to extend or contract to drive the stick
104
.
It is to be noted that the oil paths
113
-
1
to
113
-
6
described above are communicated with the hydraulic pump which is driven by the engine not shown and a reservoir tank via the hydraulic control valves
111
-
1
to
111
-
6
, and also the pilot oil paths
112
-
1
to
112
-
6
are communicated with the hydraulic pump and the reservoir tank mentioned above.
By such a construction as described above, in order to operate the boom
13
, the stick
104
or the bucket
108
, the levers
101
B and/or
101
C as boom operating members, stick operating members or bucket operating members in the operator cab
101
are suitably manually operated forwardly or backwardly and leftwardly or rightwardly to cause a pilot hydraulic pressure to act upon the control valve
111
-
1
,
111
-
6
or
111
-
2
via the pilot oil path
112
-
1
,
112
-
6
or
112
-
2
to drive the boom driving hydraulic cylinder apparatus
105
, the stick driving hydraulic cylinder apparatus
106
or the bucket driving hydraulic cylinder apparatus
107
to extend or contract.
Consequently, for example, if the boom driving hydraulic cylinder apparatus
105
is driven to extend or contract, then a boom raising operation (in a direction
Ono Tomoaki
Tozawa Shoji
Batson Victor
Shin Caterpillar Mitsubishi Ltd.
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