JPH0344876Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an excavator, and in particular, to an excavator that is optimal for tunnel excavation and the like.

[Conventional technology]

There have been various proposals for excavators used for tunnel excavation. These conventional excavators have a boom that has a rotating cutter at the tip and is movable vertically and horizontally, and the boom can be swung to the desired position. It is formed to obtain an excavation cross section of.

[Problems to be solved by the invention] However, in tunnel excavation, there are cases of linear excavation with a constant excavation cross section and cases of curved excavation with a deformed excavation cross section, that is, so-called over-excavation. In some cases, excavation may require additional steps. And if the frequency of over-digging is high,
It is assumed that a long-reach boom is installed on the excavator body in advance, but when digging in a straight line, detailed boom control must be performed, making it inconvenient to use. When equipped with a reach boom, it is necessary to replace the boom with a larger reach each time additional digging is performed, which has the disadvantage of slowing down the work.

[Purpose of invention]

Therefore, in view of the above-mentioned circumstances, the present invention provides a new excavator that is equipped with a short-reach boom and can not only dig in a straight line, but also move laterally when desired to perform additional digging. The purpose is to

[Means for solving problems]

In order to solve the above-mentioned problems, the configuration of the present invention is applied to an excavator in which the excavator body is provided with a boom that swings vertically and horizontally, and a rotatable cutter is provided at the tip of the boom. The front and rear ends of the excavator body are equipped with an ejection mechanism that can be raised and lowered, and an outrigger that can be moved up and down, and a slide body that can be moved forward and backward via a hydraulic cylinder for propulsion is installed at the bottom of the excavator body. The device is characterized in that the base body is provided at the lower part of the body so as to be movable laterally via a hydraulic cylinder for driving the base body.

〔Example〕

Hereinafter, the present invention will be explained based on the illustrated embodiments.

As shown in FIGS. 1 and 2, the excavator according to the present invention includes an excavator body 1, a base body 2, and a slide body 3, and the excavator body 1 has a front and rear end. is equipped with an outrigger 4 as a main body vertical movement device and an earth removal mechanism 5.

The excavator body 1 has a rotating cutter 10 at its tip.
It has a boom 11 having a
Reference numeral 1 denotes a vertical cylinder 12 which is swingable in the vertical direction indicated by arrow a in FIG. 1, and a swing cylinder 13 which is swingable in the left-right direction indicated by arrow b in FIG.

The base body 2 constitutes the bottom of the excavator according to the present invention, and is formed so that its lower surface is in stable contact with the ground surface. That is, as shown in FIG. 3, the base body 2
is formed so that its planar shape is rectangular,
The central part has a punched part 20, so that the load from the upper part, that is, the excavator main body 1, is transferred to the four peripheral parts 2.
1, 22, 23, and 24 to be transmitted to the ground.

A pair of guide rails 25 and 26 are formed near the front and rear ends of the base body 2 and extend in the lateral direction (vertical direction in FIG. 3). A slide body 3 is fitted. At both ends of the base body 2, hydraulic cylinders 27 and 28 for driving the base body, which expand and contract along with the guide rails 25 and 26, are arranged. The tip is connected to the slide body 3 mentioned above.

The slide body 3 is connected to the lower surface of the excavator body 1 so that the excavator body 1 can move freely in the lateral direction (up and down direction in FIG. 2) with respect to the base body 2. It consists of a frame body 30 formed to have a rectangular shape as a whole, and has appropriate sliding pieces 31, 32, 33, and 34 at each of the four corners of the frame body 30. . The sliding pieces 31 and 32 are connected to the guide rail 2.
5, the sliding pieces 33 and 34 are fitted onto the front guide rail 26, respectively, so that the sliding body 3 can be moved laterally (up and down in FIG. 3). Further, brackets 35 and 36 are attached to the ends of the frame body 30 of the base body 3 in the front-rear direction (horizontal direction in FIG. 3), and the hydraulic cylinders 27 and 36 are attached to the brackets 35 and 36, respectively. The tips of each of the 28 rods 27a and 28a are connected.

Therefore, when the base body 2 is in a fixed state, if the hydraulic cylinders 27 and 28 are extended, the slide body 3 will move in the lateral direction (vertical direction in FIGS. 2 and 3).
When the slide body 3 is fixed at the moved position and the lower base body 2 is in a movable state, if the hydraulic cylinders 27 and 28 are compressed, the base body 2 will move the slide body 3. It will move by following the direction. That is, it is possible to move the excavator in the lateral direction corresponding to the stroke of the hydraulic cylinders 27 and 28. By repeating the above operations, the excavator can be moved laterally within the tunnel by a desired stroke.

As shown in FIG. 1, a hydraulic cylinder 37 for propulsion is disposed between the slide body 3 and the excavator main body 1. The hydraulic cylinder 37
, whose base end is the frame body 3 of the slide body 3
0, and the tip of the rod 37a is connected to the lower surface of the excavator main body 1. The direction of expansion and contraction of the hydraulic cylinder 37 is the front-rear direction (the left-right direction in FIG. On the other hand, it is designed to be able to move forward and backward.

That is, when the excavator main body 1 is raised by the operation of the outrigger 4 as the main body vertical movement device and the earth removal mechanism 5 (described in detail later), the slide body 3 is also raised together with the excavator main body 1. ,
In addition, the base body 2 is also raised together with the slide body 3, and the contact with the ground surface is cut off, so that the base body 2 and the slide body 3 are in a freely movable state. Then, from this state, if the propulsion hydraulic cylinder 37 that is already in the extended state is to be contracted, the slide body 3 and the base body 2 connected thereto
will move in the forward direction (to the left in FIG. 1). Then, from the state after the above movement is completed, the excavator main body 1 is moved by the outrigger 4 and the earth removal mechanism 5.
When attempting to lower the base body 2, the lower surface of the base body 2 comes into contact with the ground surface, that is, the base body 2 is temporarily fixed at the forward position. Furthermore, the outrigger 4 and the earth removal mechanism 5
If the propulsion hydraulic cylinder 37 is extended after breaking contact with the ground surface, the excavator main body 1 will move in the forward direction (to the left in FIG. 1). Then, the excavator main body 1
After the movement of the excavator is completed, if the outrigger 4 and the earth removal mechanism 5 are operated to make contact with the ground surface, the excavator will be stabilized at the desired position and excavation using the cutter 10 will be possible. becomes.

The outrigger 4 includes a bracket 40 connected to the rear end of the excavator main body 1, and a bracket 40 connected to the rear end of the excavator main body 1.
A hydraulic cylinder 41 whose upper end is held at zero, and a plate 4 connected to the lower end of the hydraulic cylinder 41.
2, and is formed so that the plate 42 is pressed against the ground surface when the hydraulic cylinder 41 is extended, and the contact of the plate 42 with the ground surface is cut off when the hydraulic cylinder 41 is contracted. There is.

Further, the earth removal mechanism 5 includes a bucket body 50 and a scraping body 51.
is pivotally supported at the front end of the excavator main body 1, and is formed to be able to rise and fall freely by the expansion and contraction of the hydraulic cylinder 52.

The scraping body 51 is a bucket body 5.
0 and rotate its blade 51a,
The bucket body 50 is formed so as to scoop up the earth and sand falling on the upper surface thereof and cause it to fall onto the conveyor 53.

Therefore, in the earth removal mechanism 5, if the hydraulic cylinder 52 is extended, the scraping body 50
If the front end of the scraping body 50 is raised and the contact with the ground surface is broken and the hydraulic cylinder 52 is contracted, the front end of the scraping body 50 is lowered and the contact with the ground surface is broken. When the contraction of the hydraulic cylinder 52 is further promoted,
The base end side, that is, the excavator main body 1 side will be raised.

In the excavator according to the present invention formed as described above, a maintenance section 6 is provided on the excavator main body 1.
is formed to enable various operations of this excavator.

[Effect of idea]

According to the present invention, the following effects can be obtained.

When the excavator body is raised via the earth removal mechanism and outriggers, the slide body and base body also rise at the same time, and in this state, the base body does not interfere with the ground surface. Therefore, by expanding and contracting the hydraulic cylinder for propulsion, the slide body and base body can be moved forward or backward, and the position of the excavator can be advanced or retreated to any desired position without installing rails, etc., and the operation can be repeated. Allows unlimited forward and backward movement.

Similarly, by expanding and contracting the hydraulic cylinder for driving the base body while the excavator is raised, the base body can be moved laterally to any position without the need for rails, etc., and by repeating this operation, the excavator can be moved laterally. Can move in any direction without limit.

By finely adjusting the hydraulic cylinder for propulsion and the hydraulic cylinder for driving the base body, the longitudinal and lateral movement of the excavator can be finely adjusted.

Not only can the excavator move forward and backward, but it can also move laterally, making it possible to excavate a tunnel with a desired cross-sectional shape even with an excavator equipped with a boom with a small reach.

Since the base body, which is the bottom part, is cut off from contact with the ground surface when the excavator is moved, there is no inconvenience of disturbing the ground surface.

It also has the advantage of being economically advantageous since it is not necessary to lay rails on the ground surface for the movement of the excavator.

[Brief explanation of drawings]

FIG. 1 is a side view of an excavator according to the present invention, FIG. 2 is a plan view, and FIG. 3 is a partial plan view showing a state in which a slide body is fitted to a base body. DESCRIPTION OF SYMBOLS 1... Excavator body, 2... Base body, 3... Slide body, 4... Outrigger, 5... Earth removal mechanism, 10... Cutter, 11... Boom, 12,
13, 27, 28, 37, 41, 52... Hydraulic cylinder, 25, 26... Guide rail, 31, 3
2, 33, 34...Sliding body.

Claims (1)

[Scope of utility model registration request] In an excavator in which the excavator body is provided with a boom that swings vertically and horizontally, and a rotatable cutter is provided at the tip of the boom, an ejection mechanism that can be raised and lowered at the front end and rear end of the excavator body, respectively. A slide body is provided at the bottom of the excavator body to be able to move forward and backward via a hydraulic cylinder for propulsion, and a base body is attached to the bottom of the slide body via a hydraulic cylinder for driving the base body. An excavator characterized in that an excavator is provided so as to be movable laterally.