JPH108868A - Leader attachment for civil engineering and construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a pressed excavation process and a forced pile drive by applying the constitution that a bracket for mounting an auger drive motor and a pile forcing device is caused to slide via the expansion and contraction of a hydraulic cylinder. SOLUTION: Upon the expansion of a hydraulic cylinder 7, an end leader 4b as well expands by the same length. Concurrently, an upper sprocket 10 ascends by the same length, and an auger drive motor 5 or a bracket 6 ascends over a distance two times as long as the expansion of the cylinder 7, due to the travel of an upper chain 15 wound around the sprocket 10. Then, when an earth auger is mounted on the motor 5 or a pile forcing device is mounted on the bracket 6 for holding a pile and the cylinder 7 is made to contract, the motor 5 or the bracket 6 descends over a distance two times, as long as the dcontraction of the cylinder 7. At the same time, a lower sprocket 13 descends by a distance equivalent to the contraction of the cylinder 7 and a downward pressing force acts on the motor 5 or the bracrket 6 via a lower chain 14, thereby keeping a sufficient biting amount.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leader attachment for a civil engineering / construction machine that performs underground excavation, pile insertion, and the like.

[0002]

2. Description of the Related Art Conventionally, in civil engineering and construction machines for underground excavation and pile injection using an earth auger, an auger drive motor or a pile press-in device is slidably mounted on a leader, and the auger drive motor and the like are mounted. One end is suspended by a wire rope wound on a winding drum directly or via a bracket, and underground excavation or pile injection is performed by the weight of an auger drive motor or the like. However, since the excavation depth and the length of the pile to be pressed differ depending on the construction site, it is necessary to change the length of the leader as necessary. In such a case, the auxiliary leader is lifted by a crane, etc. Attaching the auxiliary reader to a reader already mounted on a vehicle with bolts, nuts, or the like has been performed.

However, when underground excavation or press-fitting of piles is performed only by the weight of the auger drive motor and the earth auger or the pile press-fitting device, if the soil is hard, the amount of penetration is caused only by the weight of the auger drive motor and the earth auger or the pile press-fitting device. In addition, it is not possible to carry out efficient construction, and the method of attaching the auxiliary reader with bolts, nuts, etc. requires time for attaching and detaching the auxiliary reader, which is dangerous and requires a crane to suspend the auxiliary reader. In particular, there is a heavy burden when traveling between sites is frequently performed.

[0004] On the other hand, underground excavation and press-fitting of piles by an earth auger are generally performed in a straight line in many cases. In a construction machine, since it is not possible to perform a straight line construction only by turning the upper swing body, it is necessary to move the lower traveling body back and forth or left and right.

However, in such a conventional civil engineering / construction machine having no mechanism for sliding the leader in the front-rear direction, the method of moving the lower traveling body back and forth or left and right to perform linear construction is not suitable for urban construction. In such a narrow place, difficulties were sometimes encountered.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to make it possible to carry out an upper turning without moving a lower traveling body so as to enable smooth construction in a narrow construction site. By turning the body, it is possible to perform linear construction, press excavation by reducing the length of the hydraulic cylinder for extending and retracting the leader, and furthermore, by making it possible to adjust the length of the leader with one touch, the excavation depth and An object of the present invention is to provide a civil engineering / construction machine capable of promptly responding to a construction in which a pile has a different press-fit length, and which can be easily moved between sites.

[0007]

In order to achieve the above object, according to the present invention, an upper revolving structure is mounted on a lower traveling structure so as to be capable of revolving, and underground excavation or pile press-fitting is possible at the front of the upper revolving structure. In civil engineering and construction machines equipped with a leader attachment, the leader is a vertically extendable leader consisting of a base leader and a tip leader, and an auger drive motor or a bracket for mounting a pile press-in device can slide on the tip leader side. In addition, a hydraulic cylinder for extending and retracting the leader is arranged in parallel with the leader, the cylinder part of the hydraulic cylinder is fixed to the base leader side, and the rod tip is fixed to the tip leader side, respectively.
An upper sprocket (roller) is arranged on the rod tip side of the hydraulic cylinder, and a lower sprocket (roller) is arranged on the telescopic tip leader side. One end is on the base leader side, and the other end is the auger drive motor or Two sets of chains fixedly mounted on the bracket for mounting the pile press-in device are separately wound around the upper sprocket (roller) and the lower sprocket (roller), and the auger drive motor or the pile press-fit via the chain by the expansion and contraction of a hydraulic cylinder. The equipment mounting bracket is slid to allow excavation or press-fitting of piles,
Further, the stay supporting the leader is a stay that can be extended and contracted in the front-rear direction and includes a base stay and a tip stay. The base stay is fixed to the front part of the upper revolving unit, and one end of the tip stay is pivoted to the lower part of the base leader. It is characterized in that the work position can be arbitrarily changed within a predetermined range by using a hydraulic cylinder to extend and contract the stay.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a lower traveling body, on which an upper revolving superstructure 2 is pivotably mounted. A base stay 3a and a tip stay 3b are provided at the front of the upper revolving unit 2.
The base stay 3a of the stay 3 which is configured to extend and contract in the front-rear direction is fixed. Tip stay 3b of the stay 3
A vertically extending and contractable reader 4 composed of a base reader 4a and a tip reader 4b is pivotally mounted on a tip of the base reader 4a so as to be able to rotate back and forth by a shaft 4c provided below the base reader 4a. An auger drive motor 5 (or a pile press-in device) mounting bracket 6 is slidably mounted on the tip reader 4b.
A hydraulic cylinder 7 for expansion and contraction is provided in parallel with the leader 4, and a cylinder portion 7a of the hydraulic cylinder 7
It is fixed by brackets 4d and 4e fixed to a. The tip of the rod portion 7b of the hydraulic cylinder 7 is attached to the bracket 4f fixed to the tip of the tip reader 4b by a bracket 8f.
A shaft 9 fixed to the bracket 8 and provided on the bracket 8
An upper sprocket (roller) 10 is rotatably mounted on the shaft. One end of a stay extending / retracting hydraulic cylinder 11 that slides the stay 3 in the front-rear direction is pivotally connected to the tip stay 3b by a pin 11a. Have been. Further, a bracket 4g is fixed above the shaft 4c of the base leader 4a, and one end of a hydraulic cylinder 12 for rotating the leader 4 back and forth is pivotally attached to the bracket 4g by a pin 12a. Is pivotally connected to the front part of the upper swing body 2 by a pin 12b.

A bracket 4h is fixed to the tip leader 4b, and a lower sprocket (roller) 13 is rotatably mounted on the bracket 4h by a pin 4i.
A bracket 4j is fixed to the upper part of the base leader 4a. One end of a lower chain 14 is fixed to the bracket 4j, and the other end of the lower chain 14 is wrapped around a lower sprocket (roller) 13; An auger drive motor 5 (or a pile press-fitting device) is slidably mounted on the tip leader 4b.
On the other hand, one end of the upper chain 15 is fixed to a bracket 4k fixed to a substantially central portion of the base leader 4a, and the other end of the upper chain 15 is an upper sprocket (roller) 1.
After being wrapped around zero, it is fixed to the lower end 6b of the bracket 6 for mounting the auger drive motor 5 (or pile press-in device) slidably mounted on the tip leader 4b.

Next, the operation of the present invention will be described. First, in the movement between the construction sites, the hydraulic cylinder 7 is contracted and the leader 4 is made the shortest length, and the hydraulic cylinder 12 is contracted and the entire reader attachment is turned around the axis 4c. The storage state as shown in FIG. Next, at the time of construction, the hydraulic cylinder 12 is extended, and the leader 4 is made vertical. When the excavation depth is shallow or when the pile to be pressed is short and the leader 4 does not need to be extended, the underground excavation may be performed with the earth auger as it is, or the pile may be mounted with the pile press-in device. Can be press-fitted. On the other hand, when the excavation depth is deep or the pile to be press-fitted is long, it is necessary to extend the leader 4. In this case, when the hydraulic cylinder 7 is extended, the distal end leader 4b of the leader 4 is attached to the bracket 8 provided at the distal end of the rod 7b of the hydraulic cylinder 7.
Is fixedly mounted via the bracket 4f, the leading end leader 4b also extends by the same length. On the other hand, when the hydraulic cylinder 7 extends, the upper sprocket (roller) 10 provided at the tip of the hydraulic cylinder 7 also rises by the extension of the hydraulic cylinder 7 and the upper chain around the upper sprocket (roller) 10. Due to 15, the bracket 6 for mounting the auger drive motor 5 (or the pile press-in device) is raised by twice the extension length of the hydraulic cylinder 7. And
An earth auger is mounted on the auger drive motor 5, or the auger drive motor 5 is removed, and a pile press-fitting device is mounted on the bracket 6 to grip the pile. When the hydraulic cylinder 7 is contracted from this state, the upper sprocket (roller) 10 is also lowered by the contracted length of the hydraulic cylinder 7, and the leading end leader 4b is contracted by the same length.
(Or pile press-in device) The mounting bracket 6 is lowered by twice the reduced length of the hydraulic cylinder 7. At the same time, the lower sprocket (roller) 13 axially mounted on the tip leader 4b via the bracket 4h also descends by the reduced length of the hydraulic cylinder 7, and the auger drive motor 5 (or pile press-fit) via the lower chain 14. Equipment) Mounting bracket 6
A downward pressing force acts on the slab, a sufficient bite amount can be secured, and efficient excavation or press-fitting of a pile becomes possible.

Next, referring to FIG. 6, a description will be given of a case where a straight construction can be performed by turning an upper revolving structure without moving a lower traveling structure. First, a civil engineering / construction machine according to the present invention is constructed. It is installed so that the predetermined position on the site, that is, the straight excavation direction is parallel to the traveling direction of the endless track of the undercarriage, and the hydraulic cylinder 7 for extending and retracting the leader is extended to obtain the required excavation depth. Is set to a predetermined height, the earth auger is mounted on the auger drive motor 5. After that, the stay extension / retraction hydraulic cylinder 11 is extended to the maximum, and the upper swing body 2 is swung until the leader attachment reaches the excavation start position A. When the earth auger is set at the excavation start position A, the auger drive motor 5 is driven, and when the hydraulic cylinder 7 is contracted, the leader 4 is also contracted, and the auger drive motor 5 with the earth auger is lowered, and the earth auger is moved. Drill into the ground and start digging. When the predetermined excavation depth is reached, the hydraulic cylinder 7 is extended and the leader 4 is extended until the earth auger is completely above the ground. Next, the upper swing body 2 is swung so that the earth auger comes to the excavation position B, and the stay extension / contraction cylinder 11 is contracted. Thereafter, the same procedure is repeated to excavate to the excavation end point position Z. When the stay extension / contraction cylinder 11 is extended / contracted, the leader rotation hydraulic cylinder 12 also needs to be extended / contracted in order to hold the leader vertically.

[0012]

According to the present invention, the construction described in detail in the above-described embodiment makes it possible to perform a straight construction by turning the upper revolving unit without moving the lower traveling unit in a narrow construction site. At the same time, a very remarkable effect can be obtained, for example, it becomes possible to press and excavate and press-fit a pile, and furthermore, it is possible to facilitate movement between sites.

[Brief description of the drawings]

FIG. 1 is a side view of a civil engineering / construction machine equipped with a reader attachment employing the present invention.

FIG. 2 is a front view of a civil engineering / construction machine equipped with a reader attachment employing the present invention.

FIG. 3 is a sectional side view of a reader attachment according to the present invention.

FIG. 4 is a rear view of the reader attachment according to the present invention.

FIG. 5 is a running posture diagram of a civil engineering / construction machine equipped with a reader attachment employing the present invention.

FIG. 6 is a construction state diagram of a civil engineering / construction machine according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving superstructure 3 Stay 3a Base stay 3b Tip stay 4 Leader 4a Base reader 4b Tip leader 5 Auger drive motor 6 Bracket 7 Hydraulic cylinder 8 Bracket 10 Upper sprocket (roller) 11 Hydraulic cylinder 12 Hydraulic cylinder 13 Lower sprocket (Roller) 14 Lower chain 15 Upper chain A Excavation start position Z Excavation end position

Claims (5)

[Claims] 1. A civil engineering / construction machine in which an upper revolving structure is rotatably mounted on a lower traveling structure, and a leader attachment capable of underground excavation or pile press-fitting is mounted on a front portion of the upper revolving structure. A vertically extensible reader composed of a reader and a tip reader is provided, and an auger drive motor or a bracket for mounting a pile press-fitting device is slidably provided on the tip reader side, and a hydraulic cylinder for extending and retracting the reader is arranged in parallel with the reader. And the cylinder part of the hydraulic cylinder is fixed to the base leader side, and the rod tip is fixed to the tip leader side, respectively.
An upper sprocket (roller) is arranged on the rod tip side of the hydraulic cylinder, and a lower sprocket (roller) is arranged on the telescopic tip leader side. One end is on the base leader side, and the other end is the auger drive motor or Two sets of chains fixedly mounted on the bracket for mounting the pile press-in device are separately wound around the upper sprocket (roller) and the lower sprocket (roller), and the auger drive motor or the pile press-fit via the chain by the expansion and contraction of a hydraulic cylinder. A civil engineering / construction machine characterized in that a device mounting bracket is slid to enable excavation or press-fitting. 2. A civil engineering / construction machine in which a revolving superstructure is pivotably mounted on a lower traveling structure, and a leader attachment capable of underground excavation or pile insertion is mounted on a front portion of the upper revolving structure. A vertically extensible reader composed of a reader and a tip reader is provided, and an auger drive motor or a bracket for mounting a pile press-fitting device is slidably provided on the tip reader side, and a hydraulic cylinder for extending and retracting the reader is arranged in parallel with the reader. And the cylinder part of the hydraulic cylinder is fixed to the base leader side, and the rod tip is fixed to the tip leader side, respectively.
An upper sprocket (roller) is arranged on the rod tip side of the hydraulic cylinder, and a lower sprocket (roller) is arranged on the telescopic tip leader side. One end is on the base leader side, and the other end is the auger drive motor or Two sets of chains fixedly mounted on the bracket for mounting the pile press-in device are separately wound around the upper sprocket (roller) and the lower sprocket (roller), and the auger drive motor or the pile press-fit via the chain by the expansion and contraction of a hydraulic cylinder. The device mounting bracket is slid and pressed to enable excavation or press-fitting, and furthermore, the stay supporting the leader is a stay that can be extended and contracted in the front-rear direction composed of a base stay and a tip stay,
The base stay is fixed to the front part of the upper revolving superstructure, one end of the tip stay is pivotally attached to the lower part of the base leader, and the stay is expanded and contracted by a hydraulic cylinder, so that the construction position can be changed arbitrarily within a predetermined range. Civil engineering and construction machinery. 3. The hydraulic cylinder according to claim 1, wherein a cylinder portion of the hydraulic cylinder for extending and retracting the leader is fixedly mounted on the distal end leader, and a rod end of the hydraulic cylinder is fixedly mounted on the base leader side. Civil engineering and construction machinery. 4. An upper sprocket (roller) and a lower sprocket (roller) for sliding an auger drive motor or a bracket for mounting a pile press-fitting device on an upper sheave and a lower sheave, respectively, and an upper sprocket (roller) and a lower sprocket (roller). The civil engineering / construction machine according to claim 1, wherein two sets of chains respectively wound around the rollers are wire ropes. 5. The civil engineering / construction as claimed in claim 1, wherein the leader is pivotally moved back and forth around a pivot point between the leader and the stay by a hydraulic cylinder during running, and is retractable. machine.