JPH033634Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention is an excavator in which a rotatably driven excavator blade is attached to the tip of a suction pipe that suctions and discharges excavated soil mixed with a stabilizing liquid. Regarding.

[Conventional technology]

The above-mentioned excavator can excavate underground holes by simply lowering it one after another, and there is no need to repeatedly raise and lower it to discharge the excavated soil, unlike in the case of Clam Ciel. This has the advantage that the construction period can be significantly shortened by saving time, and the work efficiency can be greatly improved when excavating deep underground holes such as those for constructing underground continuous walls. It has the advantage of being able to excavate well even in hard ground.

However, when excavating in places where there is a risk that cobbles may be mixed in the excavated soil, such as on the ground of an old river or a reclaimed land at the mouth of an estuary, cobbles larger than the inner diameter of the suction pipe may be mixed in. If this is done, the boulders cannot be sucked into the suction pipe, so once the excavator has been pulled up, the boulders cannot be excavated unless the boulders are pulled up with a bucket.Also, the boulders can get into the suction pipe and become clogged, making it difficult to excavate. Depending on the nature of the excavated ground, this method had the disadvantage of lowering work efficiency, such as having to disassemble the suction pipe and remove boulders after pulling the machine up.

Therefore, as disclosed in Japanese Patent Application Laid-Open No. 54-5201, a device is known in which boulders are crushed by the relative rotation of a reverse pipe and a non-rotating reverse pipe fitted therein.

However, when using the above-mentioned conventional technology, since the boulders are crushed by relative rotation of the reverse pipe with the non-rotating reverse pipe, the boulders are not easily caught on the tip of the reverse pipe or the non-rotating reverse pipe, and in particular, the cobbles are round, etc. When the surface is smooth, the boulders tend to escape from the tip of the reverse pipe or non-rotating reverse pipe, making it difficult to crush the boulders reliably.

[Problem that the invention attempts to solve]

In view of the above points, the present invention aims to provide an excavator that can reliably crush the cobblestones and excavate well even in the ground where cobblestones larger than the specified size are mixed.

[Means for solving problems]

The excavator according to the present invention is characterized in that a plurality of crushing blades are provided between the tip of the excavating blade and the suction pipe, and are movable relative to each other and close to each other to crush boulders; The stone crushing device is equipped with a driving means for moving the stone.

[Effect]

In other words, even if there are cobblestones larger than a specified size mixed in the earth and sand excavated by the excavation blade, the cobblestones are crushed by the stone crusher before they are sucked into the suction pipe, and then In other words, it attracts people to the world. Moreover, since the stone crushing device is equipped with a device that crushes cobblestone by moving multiple crushing blades close to each other, even if the surface of the cobblestone is smooth, the crushing blades move close to each other. This prevents the crushing blade portion from biting into the cobblestone and causing the cobblestone to escape, making it possible to reliably and powerfully crush the cobblestone.

〔effect〕

Therefore, even in the ground where there is a possibility that cobbles may be mixed in the excavated soil, the cobbles can be reliably crushed and excavated without causing problems such as clogging of the cobbles, and the excavated ground can be properly excavated. We are now able to provide a highly versatile excavator that can excavate regardless of the condition.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to illustrative drawings.

A transmission gear case 2 is provided across the pair of left and right guide plates 1, 1, and is arranged in the transmission gear case 2 in the opposing direction of the left and right guide plates 1, 1 and is rotatable around a vertical axis. Upper first excavation blade 3
... and lower second excavating blade bodies 4, 4, and power is transmitted from two electric motors 5, 5 to the first and second excavating blade bodies 3, 4 via the transmission gear case 2. and the first
A suction pipe 6 is connected to each of the excavation blade bodies 3, and the suction pipes 6 are connected to one reverse pipe 7.
As the excavated earth and sand are sucked and discharged mixed with a stable liquid such as pentonite liquid as the excavated soil is suspended and lowered via a wire 8, an underground hole is excavated for forming an underground continuous wall, etc. The excavator is configured to move.

9 in the figure is a side cutter, which is provided on both the left and right sides between the adjacent rotation axes of the first excavation blade 3 and the second excavation blade 4, 4, and is a long side cutter in a rectangular excavation hole. is configured to be a straight line in plan view.

The distal end pipe portion 6a of the suction pipe 6 is constituted by a rigid cylinder, and the distal end pipe portion 6a is the suction pipe 6.
The distal side tube portion 6a is rotatably attached to the sealed casing 11 via bearings 12, 12, and the distal side tube portion 6a is connected to the closed casing 11 via a swivel joint 10.
A ring gear 13 is attached to the ring gear 13, and a transmission gear 14 interlocked with the gear case 2 is engaged with the ring gear 13.

Each of the first excavating blade bodies 3 is composed of a plurality of bits 3a distributed around its rotation axis, and each of the bits 3a is connected to a bracket 15 to which the tip side pipe portion 6a is attached. It is pivotally connected to be able to swing freely around a horizontal axis. To be more specific, the bits 3a move toward and away from other bits 3a facing each other across the rotational axis by swinging around the horizontal axis.

The tip of the first excavating blade 3 and the suction pipe 6
There is a suction pipe 6 mixed in the excavated soil between
A stone crushing device 18 is provided for crushing boulders of a predetermined size or larger that are about to be sucked into the stone.

The stone crushing device 18 is constructed by having a crushing blade 17 fixedly connected to each of the bits 3a at a location facing the other bit 3a across the rotation axis, and provided with a driving means.

The crushing blades 17 move toward and away from each other by the swinging of the bits 3a, and crush the boulders by moving toward each other.

The driving means is a means for moving the crushing blade section 17 away and away. Specifically, the bit 3
a... A single-acting hydraulic cylinder 16 is interposed between each and the tip side pipe portion 6a, and a hydraulic unit 19 consisting of a hydraulic pump, a control valve, etc. is provided in the casing 11, and this hydraulic unit 19 and the hydraulic cylinder 16 are connected to each other. A rotary joint 20 is provided to connect the
Then, from the hydraulic unit 19 to the hydraulic cylinder 16
By supplying and discharging pressure oil to and from the bits 3a and 3a, the bits 3a, which are being driven and rotated around the vertical axis, are driven to swing back and forth.

4 and 5 show another embodiment, in which a downward opening casing 21 is attached to the tip of the suction pipe 6, and at the bottom of the casing 21,
The first excavating blade body 3 is rotatably attached via trident-shaped upper and lower support frames 22 and 23 and bearings 24 and 24.

Between the first excavation blade 3 and the suction pipe 6, crushing gears 25, 25, which serve as crushing blades for crushing boulders, are arranged in pairs on the left and right, arranged vertically, and mounted on the casing 21. A stone crushing device 18 is provided with 26,26. As shown in FIG. 5, an output shaft 27 protruding from the gear case 2
A first transmission shaft 30 is interlocked and connected to the rotating shafts 28 and 28 of the upper gears 25 and 25, respectively, via a first bevel gear type transmission mechanism 29, and a first transmission shaft 30 is interlocked and connected via a second bevel gear type transmission mechanism 31. The rotation shafts 28, 28 of the upper gears 25, 25 and the lower gear 26,
Of the 26 rotating shafts 32, 32, those located on the same side in the horizontal direction are interlocked and connected via a chain type transmission mechanism 33, and furthermore, one of the rotating shafts 32, 32 of the lower gears 26, 26 A second transmission shaft 35 is interlocked and connected via an eighth bevel gear type transmission mechanism 34, and the second transmission shaft 35 is interlocked and connected to a drive shaft 36 of the first excavation blade body 3 via a gear type transmission mechanism 37. and the crushing gears 25, 25,
26, 26 and means for driving the first excavating blade body 3 are configured. The entire drive transmission system is covered with a cover in a sealed state.

According to the present invention, a suction pipe 6 and a stone crushing device 18 may be attached to the second excavating blade bodies 4, 4.

Furthermore, the present invention may be a combination of the stone crushing devices 18, 18 of the two embodiments described above.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of the main part, Fig. 2 is an overall schematic front view, Fig. 3 is a side view of Fig. 2, and Fig. 4 is a partially cutaway front view of the main part showing another embodiment. FIG. 5 is a schematic perspective view of the main parts of another embodiment. 3... Excavation blade body, 6... Suction pipe, 18... Stone crushing device.

Claims (1)

[Scope of utility model registration request] An excavation blade 3 is rotatably mounted on the tip side of a suction pipe 6 that sucks and discharges excavated soil mixed with a stabilizing liquid.
... is an excavator equipped with the excavating blade body 3...
A stone crushing device 18 is attached between the tip of the blade and the suction pipe 6, which is equipped with a plurality of crushing blades that are movable relative to each other and that crush boulders by moving close to each other, and a driving means that moves them relatively close and far. excavator.