Cutting device with vertical and horizontal movement

Details Cutting device with vertical and horizontal movement Cutting device with vertical and horizontal movement

1999-03-01

2001-09-11

Bagnell, David (Department: 3673)

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Floor-working

C125S013010, C125S013030

Reexamination Certificate

active

06286905

ABSTRACT:

TECHNICAL FIELD
The present invention relates to a cutting device, which is attachable to the front end of a working machine mounted on a hydraulic excavator or the like, and which is preferably used for cutting a concrete building, a road pavement, or the like.
BACKGROUND ART
Cutters are employed for pulling down a concrete building and for cutting an opening in a floor or a wall surface for reforming a building; and most of them are hand held cutters. However, there is a problem in that a cutting operation with a hand held cutter is heavy labor, so that the efficiency of the operation is low, and also it is hard to cut a high portion.
Then, in order to improve the efficiency of the operation, there has been suggested a structure in which a self-propelled chain cutting device is mounted to a rail and the rail is anchored to a material to be cut so as to self-propel the chain-cutter along the rail, thereby cutting the material to be cut. The rail can be mounted to a small back hoe machine. However, there is a problem in that the operation is limited since the machine can cut only in a direction perpendicular to the back hoe machine.
In order to solve the problem mentioned above, there is suggested in Japanese Patent Publication No. 7-13376 a supporting apparatus for a wall surface excavating chain cutter, which mounts the chain cutting device to a distal end of an operating machine arm of a traveling truck in a freely swinging manner.
FIG. 30
is a side elevational view of the supporting apparatus for the wall excavating chain cutter, in which a guide rail
91
is mounted to the distal end of a operating machine arm
90
of a hydraulic excavator in such a manner as to freely swing in a horizontal direction, thereby being swingable by a hydraulic cylinder
92
for swinging. Supporting leg frames
93
and
93
are provided at a lower side of both ends of the guide rail
91
, and supporting leg shoes
94
and
94
are provided on a distal end of each of the supporting leg frames
93
and
93
in such a manner as to freely adjust the height thereof. A chain cutter
95
, structured such as to be freely tilted upwardly and downwardly by a tilting hydraulic cylinder
96
, is mounted to the guide rail
91
. The chain cutter
95
is structured such as to be capable of being moved in a horizontal direction along the guide rail
91
by a hydraulic cylinder
97
for horizontal traveling.
When cutting a floor surface, as shown in
FIG. 30
, the supporting leg shoes
94
and
94
are brought into contact with the floor surface. Next, the chain cutter
95
is tilted downwardly from a position X, shown by a narrow two dot chain line, to a position, shown by a solid line, by the tilting hydraulic cylinder
96
so as to cut the floor to a depth of H. Next, the chain cutter
95
is horizontally moved along the guide rail
91
by the horizontal movement hydraulic cylinder
97
so as to excavate, as shown by a narrow two dot chain line Y.
Since the supporting apparatus is mounted to the distal end of the working machine arm
90
of the hydraulic excavator, it is possible to excavate not only the floor but also a wall; further, it is possible to excavate in an optional direction with respect to the hydraulic excavator, and it is possible to excavate a high portion.
However, the conventional structure mentioned above has the following problems.
(1) Since the chain cutter
95
is swung downwardly at a time of starting an excavation so as to deepen the cut depth, there is generated an incomplete cut portion for a length B
2
before reaching the excavation depth H. Further, there is left an incomplete cut portion for a length D at a time of completing the excavation. Accordingly, as shown in
FIG. 31
, for example, when cutting a regular rectangular portion (a hatched portion) having a depth H and a length A along a line, the cut length C
2
along the line is obtained by the following formula.
C
2
=
A+B
2
+
D
 Therefore, there is a lot of wasteful cutting (=B
2
+D), and a wide cut area is required.
(2) Since the guide rail
91
is fixed to the floor surface by the, supporting leg frames
93
and
93
, the center portion thereof is floated. Accordingly, when cutting a Hume pipe or the like, it is impossible to hold the Hume pipe or the like, and it is required to independently fix the Hume pipe or the like, so that the operation is troublesome.
(3) Since it is necessary to periodically adjust a tension when the chain of the chain cutter
95
is abraded, it is troublesome. Further, since it is impossible to always maintain a proper tensile state, a cutting efficiency is deteriorated, and an abnormal abrasion is generated in the chain, a sprocket for driving the chain, a chain bar or the like, so that a deterioration of the service life thereof is caused.
(4) Since the distal end of the chain cutter
95
is vibrated due to a reaction force at a time of cutting, it is impossible to accurately and neatly cut. Further, since an abrasion and a crack of the chain bar are easily generated, and an abrasion of the chain and the driving sprocket is hard, the frequency of replacing parts is increased and a deterioration of a cutting capacity is caused.
In this case, when the load becomes high during a cutting by the chain cutter
95
, there is a case that a speed of rotation of the chain cutter
95
is lowered and the chain cutter
95
sometimes stops. On the contrary, when the load becomes low, a power loss is generated unless a feeding speed of the chain cutter
95
is increased. Accordingly, it is necessary to adjust them during the operation. These adjustments have been conventionally performed in accordance with an operator determining a load state while monitoring, for example, an oil pressure gauge, and manually controlling the rotational speed and the feeding speed of the chain cutter
95
. Therefore, there has been a problem in that it requires a lot of skill to operate the apparatus, and it is hard to effectively perform a cutting operation.
SUMMARY OF THE INVENTION
The present invention is made by taking the problems in the conventional arts mentioned above into consideration, and an object of the present invention is to provide a cutting device which is capable of: effectively performing a cutting operation by reducing a wasteful cutting, easily performing a cutting of a Hume pipe or the like, performing an accurate and neat cutting, having a reduced abnormal abrasion of a cutter, and having a long service life.
In accordance with a first aspect of the present invention, there is provided a cutting device comprising:
a guide supporting member, which is mountable to a distal end of a working machine on a self-propelled working vehicle in such a manner as to freely swing;
guiding means, horizontally supported by the guide supporting member;
a cutter, mounted to the guiding means;
vertical movement means for moving the cutter in a direction perpendicular to the guiding means; and
horizontal movement means for moving the cutter in a horizontal direction along the guide means.
In accordance with the structure mentioned above, it is possible to position the guide means at an optional position and in an optional direction, to move the cutter vertically downwardly by the vertical movement means so as to cut into a material to be cut, and to move the cutter in the horizontal direction along the guide means by the horizontal movement means so as to cut the material to be cut. Further, it is also possible to cut a wall and a high portion. Still further, since the cutter is moved in a perpendicular direction at a time of initial cutting, it is possible to efficiently cut the portion to be cut without waste. That is, a cut surface having a deep groove and a rectangular shape can be obtained, and it is possible to cut an opening in a wall.
In accordance with a second aspect of the present invention, there is provided a cutting device as cited in the first aspect, in which a lower surface of the guide supporting member projects from a lower surface of the guiding means.
Since it is p

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