JPH0442389Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to an underground drilling device using a power shovel that excavates a vertical hole while pushing and pulling a casing into the ground.

[Conventional technology]

Water and sewage systems in urban areas are usually
As shown in FIG. 5, after the branch pipes 2 from each house are collected for several houses, they are connected to the main pipe 1 buried underground through the service branch pipe 3. The current state of the burial work for the service branch pipe 3 is that after the sheet piles 5 are driven by a sheet pile driving machine or the like along the excavated cross-sectional shape (square or rectangular) of the shaft 4,
A vertical hole is excavated to a predetermined depth using an excavator. After that, the service branch pipe 3 is connected to the main pipe 1, and after backfilling, the work of pulling out the sheet piles is carried out, and one cycle is completed. In this way, excavation work for vertical holes for water and sewage systems requires two types of machines: a sheet pile driving/pulling machine and an excavator, and the work process also includes sheet pile driving → excavation → backfilling →
It consists of four steps, including drawing out the sheet piles, and considering the scale of the work, it takes a relatively long time to replace machines and make setups, making it a labor-intensive process. Furthermore, in order to bury the service branch pipe 3 with a diameter of several tens of centimeters, a rectangular section with a side of 2 to 3 meters is excavated, which is a wasteful type of work. In addition, conventionally, in order to excavate and backfill a shaft, a telescoping arm was pivoted to the tip of the boom in Utility Model Application No. 55-44858, Utility Model Application No. 56-36763, and Utility Model Application No. 57-75049. , a structure having a grab bucket at the tip of the arm is disclosed, and Japanese Patent Publication No. 42-7948 and Japanese Patent Publication No. 41-21508 have a structure having a casing press-in/extraction device for constructing a screw conveyor at the front of the vehicle. is disclosed. However, in the above conventional configuration, excavation is carried out using a screw conveyor that requires the casing to be inseparable, so the size of the casing is limited by the external shape of the screw, making it impossible to widen the excavation range, and the excavated earth and sand The problem is that it is not possible to excavate while searching for buried pipes because they are transported inside the casing by a screw and discharged onto the casing.

[Problem that the invention attempts to solve]

This idea was devised in view of the above circumstances, and its main problems were a boring means for press-fitting or pulling out a cylindrical casing into the ground for a power shovel, and This device is equipped with a means for excavating and backfilling with a grab bucket, making it possible to perform vertical hole excavation work for water supply and sewerage, etc., which requires both operations with one machine, and is set to a large diameter without being restricted by the external shape of the grab bucket. An underground drilling device that press-fits a casing, excavates the earth and sand inside the casing with a grab bucket, and sequentially discharges the earth and sand outside the casing, making it possible to excavate a wide range of pits while searching for buried objects. Our goal is to provide the following.

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention pivots the middle part of a telescoping arm that extends and contracts in the longitudinal direction to the tip of a boom that is installed on the revolving body of a power shovel so that it can be raised and lowered, and the arm is connected via an elevation cylinder. An underground drilling device that is mounted so as to be tiltable up and down, has a grab bucket provided at the tip of the telescoping arm, and has a boring means pivotally connected to the lower running body of the power shovel via a connecting member, wherein: (a) the connecting member is Its base end is pivoted to the lower running body and branches to the left and right, and the base end is equipped with a swinging cylinder that slides left and right, and the tip is fixed to a pair of supporting legs that stand up at a distance from the left and right in front. (b) A boring means that clamps and holds the outer circumferential surface of the cylindrical casing is swingably connected to the support leg via a press-fit cylinder; (c) The boring means is swingably connected to the The tip of an extendable arm pivotally connected to the cylinder is fixed, and when the press-fitting cylinder is press-fitting or pulling out, the swinging cylinder swings the casing held by the boring means, and the casing is pressed into the ground or pulled out. (d) The holding position of the casing is set at a position where the grab bucket can be inserted into the casing when the telescoping arm is held in an upright position and extended. .

[Effect]

According to this invention, a cylindrical casing that serves as a sheet pile is held in an upright position and is pressed into the ground using boring means. During press-fitting and pulling out, when the press-fitting cylinder is operated, the swinging cylinder is slid from side to side to swing the boring means held on the support leg via the arm, and the cylindrical casing held between the boring means is interlocked. It can be swung left and right. Then, the telescoping arm is displaced by the elevating cylinder via the boom so that it assumes an upright position on the extension of the casing, the telescoping arm is extended and contracted in the longitudinal direction, and the grab bucket provided at its tip is inserted into the cylinder of the casing. , excavation or backfilling. Here, the casing can be set without being restricted by the external shape of the grab bucket, so
A wide area can be excavated by press-fitting the casing in one place, and since a grab bucket is used, excavated materials such as excavated earth and sand can be directly discharged from the casing, and the inside of the casing can also be seen from the outside. Further, the press-fitted casing can be pulled out after digging or backfilling the vertical hole using boring means to complete the work.

【Example】

A preferred embodiment of this invention will be described below with reference to the drawings. The underground drilling device shown in FIG.
A telescoping arm 6 is pivotally connected to the boom 15 via an elevating cylinder 15A with a pin at its midpoint so that it can be raised and lowered freely, and a grab bucket belt 16 is attached to the tip of the telescoping arm 6. On the other hand, in the lower running body 9 of the power shovel, a boring means 7 is provided with a swing cylinder 12, a press-fit/pull-out cylinder 13, etc. in order to swing the pipe-shaped casing 8 to enable press-fitting or pulling out in an upright position. are connected. Here, the boring means 7 has a bracket 10 provided on the undercarriage 9 of the power shovel so that the center of the boring means 7 coincides with the center line of the undercarriage 9, as shown in FIG. It is attached to the body with a pin 11 so as to be able to swing up and down and to be detachable. As clearly shown in FIGS. 2 to 4, this boring means 7 uses a configuration such as a power casing jack that swings and press-fits the casing 8.
In the case of this embodiment, the connecting member 7A of the boring means 7 is pivotally connected by a pin 11 via a bracket 10 attached to the lower traveling body 9. The connecting member 7A is integrally provided with an outrigger 21 having an outrigger cylinder 20, which is an example of a support leg, to hold the boring means 7. Further, a press-fit cylinder 13 is attached to the inside of the outrigger cylinder 20, and the lower end of the press-fit cylinder 13 is connected to a first structure 24 having a semicircular arcuate surface. The first structure 24 is pivotally connected to an opposing second structure 23 having a semicircular arcuate surface by a pin 25, and each of the arcuate surfaces is formed into a series of circles. The second structure 23 consists of two arms and is connected by a chuck cylinder 17. On the other hand, the first structure 24 is pivotally attached to the arm 23. The arm 22 is provided with a telescopic tube 26 at the center of the arm 22, and one end of the telescope tube 26 is pivotally connected to the swing cylinder 12 by a pin 27. Here, both ends of the swing cylinder 12 are connected to the connecting member 7A, and the cylinder tube is configured to move left and right. Then, the casing 8 is fitted into the semicircular first and second structures 24 and 23 and the chuck cylinder 17 is compressed.
is chucked (grasped). If the swing cylinder 12 is actuated in this state (moved left and right by hydraulic pressure), the casing 8 will be rotated alternately clockwise and counterclockwise. Actually, the circumference of the casing is 100mm to 150mm
It is rotated. It should be noted that the telescope tube 26 has a telescopic function since it has the role of absorbing a change in the distance between the swing cylinder 12 and the casing 8 when the casing 8 is swinged. The casing 8 is connected to the chuck cylinder 17.
When the press-fitting cylinder 13 is extended while being chucked, the connecting member 7A acts as a reaction force to push down the chucking portion and the casing 8 into the ground. As a result, in the case of ordinary ground that collapses when a deep hole is dug, the casing can be used to prevent collapse while performing the excavation. When the excavation is completed, operations such as inserting a mesh basket of reinforcing bars and pouring concrete are performed, and the casing 8, which has been press-fitted to a predetermined depth, is pulled out while swinging in the reverse order of the press-fitting process. Note that the casing 8 is divided into predetermined lengths,
They are used by connecting them as appropriate depending on the depth of the hole. Here, the holding position of the casing 8 held in an upright position by the boring means 7 is such that the grab bucket 16 moves up and down along the axis of the hole in the casing 8 when the telescoping arm 6 is held in an upright position and expands and contracts. When the casing 8 is press-fitted into the ground by the boring means 7, the grab bucket 16 is preferably set in the hole of the casing 8.
A vertical hole is excavated by raising and lowering the grab bucket 16 and opening and closing the grab bucket. In addition, since the boring means 7 is attached to the lower traveling body 9 in a horizontal pin manner with pins 11 via the connecting member 7A, the reaction force applied when the casing 8 is press-fitted by the boring means 7 is applied to the connecting member 7A, the outrigger 21, This becomes the dead weight of the outrigger cylinder 20, and the reaction force at the time of pulling out is received by the ground, in this case the outrigger cylinder, so if the reaction force is insufficient, the boring means 7 will simply float up using the pivot point as a fulcrum, and the lower traveling body will be removed. The structure is such that it does not affect 9. Therefore, even if excavation and casing press-fitting are performed simultaneously, it is possible to stably excavate the shaft. In addition, the boring means 7 can be easily attached and detached by the pin 11.
In this case, it is possible to perform general deep foundation excavation as a telescopic clamshell working machine, and it can be used for many purposes. In addition, although the above embodiment has been explained using the case of excavating a pit for water and sewage, the use of pit excavation is not limited to water and sewage, and any type of use is included in this invention. Of course.

[Effect of the idea]

According to this invention, instead of the sheet pile, a cylindrical casing is press-fitted into the ground in an upright position using a boring means, and the telescopic arm is moved to an upright position to vertically raise and lower the grab bucket into the hole in the casing. Since it has been made possible to excavate vertical holes, it is possible to easily carry out the excavation work of vertical holes for water and sewage systems. During the press-fitting and pulling out, the boring means that clamps the cylindrical casing is oscillated via the swinging cylinder when the press-fitting cylinder is operated.
Pulling work can be easily performed. Then, excavation is done using a grab bucket, so
Excavated earth and sand can be directly loaded into a dump truck by raising and lowering the boom or telescoping arm, and since the inside of the casing is open, excavation can be carried out while keeping an eye on the inside of the casing, making it easy to remove buried objects such as buried pipes. It is possible to excavate a pit while searching, and to perform the excavation without damaging buried pipes, etc. Furthermore, this invention uses a cylindrical casing instead of the conventionally used sheet piles, so there is no risk of the ground collapsing, making it safe and reliable. In addition to being able to perform vertical hole excavation work for water and sewage systems with just one machine, the boring means can be removed,
Also, the telescoping arm can be replaced with other attachments (for example, an arm with a bucket, etc.). Moreover, even if it is an existing power shovel, it is sufficient to improve the boring means to a structure that can be pivotally mounted, and the present invention is excellent in versatility.

[Brief explanation of the drawing]

Figure 1 is a side view showing an embodiment of this invention, Figure 2 is a side view showing an embodiment of this invention.
The figure is a side view of the main part of the section shown in Fig. 1, Fig. 3 is a plan view of the main part, Fig. 4 is a front view of the part shown in Fig. 2 as seen from the direction of arrow A, and Fig. 5 is a water supply and sewage system. FIG. 6... Telescopic arm, 7... Boring means, 8
... Casing, 9 ... Lower running body, 11 ... Pin, 14 ... Swivel body, 15 ... Boom.

Claims (1)

[Claims for Utility Model Registration] (1) A midway portion of a telescoping arm that extends and retracts in the longitudinal direction is pivotally attached to the tip of a boom that is installed on the revolving body of a power shovel so that it can be raised and lowered, and the arm is extended via an elevation cylinder. In an underground drilling device, the underground drilling device is mounted so as to be tiltable up and down, a grab bucket is provided at the tip of the telescoping arm, and a boring means is pivotally connected to the lower running body of the power shovel via a connecting member, The end is pivotally connected to the lower running body and branched to the left and right, and the base end is equipped with a swing cylinder that slides left and right, and the tip is fixed to a pair of supporting legs that stand apart on the left and right in front. A boring means for pinching and holding the outer peripheral surface of the cylindrical casing is swingably connected to the supporting leg via a press-fit cylinder, and the boring means is pivotally connected to the swinging cylinder. The tip of the extendable arm is fixed, and when the press-fitting cylinder is press-fitting or pulling out, the casing held by the boring means is swung by the swinging of the swinging cylinder, so that the casing can be press-fitted into the ground or pulled out. An underground drilling device characterized in that a holding position is set at a position where a grab bucket can be inserted into the casing when the telescoping arm is held in an upright position and extended. (2) An underground drilling device characterized in that the tip of a connecting member integrated with the boring means is pivotally attached to the lower traveling body by a horizontal pin so as to be able to pivot up and down.