JPH10299374A - Leader attachment of civil engineering and construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the execution by expanding/contracting a leader in the vertical direction through a wire rope. SOLUTION: An expandable leader comprises a base leader 4a, and a tip leader which is slidably provided with a fitting bracket 6 for an auger-driving motor 5 and a pile it-in device, and an upper sheave roller 7 and a lower sheave roller 8 are arranged above and below the leader 4a. An upper wire rope 16 one end of which is fixed to the bracket 6 and a lower wire rope 17 are connected to one drum and the other drum of a winding drum 10 of 1-shaft, 2-drum type respectively through the rollers 7, 8. When the excavation depth is large, the rope 16 is wound around the drum 10, the rope 17 is delivered to elevate the bracket 6 and a leader-4b, and after the leaders 4a, 4b are fixed with the leaders in a most expanded condition, an earth auger is mounted, and the drum 10 is turned to wind the rope 17 while delivering the rope 16, and the bracket 6 is lowered to perform the excavation. The efficient execution can be achieved thereby.

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, the method of moving the undercarriage back and forth or right and left to perform straight construction involves difficulties in narrow places such as urban construction.

[0005]

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 the hydraulic motor for extending and retracting the leader, and adjust the length of the leader with one touch, so that the excavation depth and press-fitting of piles can be performed. It is an object of the present invention to provide a leader attachment for civil engineering and construction equipment that can quickly respond to works having different lengths and that can be easily moved between sites.

[0006]

According to a first aspect of the present invention, there is provided a leader attachment in which a revolving superstructure is pivotably mounted on a lower traveling body, and a ground is provided at a front portion of the revolving superstructure. In a civil engineering / construction machine equipped with a leader attachment capable of medium excavation or pile press-fitting, the leader is a vertically extensible leader composed of a base leader and a tip leader, and an auger drive motor or a pile press-fit is provided on the tip leader side. The device mounting bracket is slidably provided,
An upper wire rope of two wire ropes having an upper sheave roller provided on an upper portion of the base leader and a lower sheave roller provided on a lower portion thereof and having one end fixed to the auger drive motor or the bracket for mounting the pile press-in device. Is wound around the upper sheave roller and then wound up on one of two drums of one shaft and two drums provided on the upper swing body and driven by a hydraulic motor, and the lower wire rope is wound around the lower sheave roller. After that, it is wound down on the other drum of the one shaft and two drums, and the hydraulic motor is used to extend and retract the leader and slide the auger drive motor or the pile mounting device mounting bracket via a wire rope to press and excavate. Alternatively, press-fitting is possible.

According to a second aspect of the present invention, there is provided the reader attachment according to the first aspect, further comprising a stay for supporting the leader, which can be extended and contracted in the front-rear direction, comprising a base stay and a tip stay. The base stay is fixed to the front part of the upper revolving structure, one end of the tip stay is pivotally attached to the lower part of the base leader, and the stay can be expanded and contracted by a hydraulic cylinder, so that the construction position can be changed arbitrarily within a predetermined range It is characterized by having.

According to a third aspect of the present invention, in the device according to the first or second aspect, the leader is rotated by a hydraulic cylinder in a longitudinal direction about a pivot point between the leader and the stay during traveling. And can be stored.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a side view of a civil engineering / construction machine equipped with a reader attachment employing the present invention, and FIG.
Shows the front view. FIG. 3 is a sectional side view of the reader attachment according to the present invention, and FIG. 4 is a rear view of the same. FIG.
Is a running posture diagram of a civil engineering / construction machine equipped with a reader attachment adopting the present invention, and FIG. 6 shows a construction state diagram.

1 and 2, reference numeral 1 denotes a lower traveling body, on which an upper revolving superstructure 2 is mounted so as to be pivotable. A base stay 3a of a stay 3 which is composed of a base stay 3a and a tip stay 3b and which can expand and contract in the front-rear direction is fixed to a front portion of the upper swing body 2. At the distal end of the distal end stay 3b of the stay 3, a leader 4 composed of a base reader 4a and a distal leader 4b and capable of extending and contracting in the vertical direction is pivotally attached to a shaft 4c provided below the base leader 4a so as to be able to rotate back and forth. Have been. An auger drive motor 5 (or pile press-fitting device) mounting bracket 6 is slidably mounted on the tip leader 4b.

3 and 4, an upper sheave roller 7 is rotatably mounted on a base leader 4a by a pin 7b via a bracket 7a, and a lower sheave roller 8 is provided below the base leader 4a via a bracket 8a. It is pivotally connected by a pin 8b. A take-up drum 10 is supported by a bracket 11 on a gantry 9 provided on the rear upper swing body 2 of the leader 4, and is rotatably pivoted by a shaft 12. This winding drum 10 has a flange 10a at the center and flanges 10b on both sides.
It is a 2-drum shaft type and is driven by a hydraulic motor 13 fixed to a bracket 11.

The stay 3 for supporting the leader 4 is a stay that can extend and contract in the front-rear direction and includes a base stay 3a and a tip stay 3b. Hydraulic cylinder 14
Of the hydraulic cylinder 1 is pivotally connected by a pin 14a.
The cylinder part 4 is fixed to the front part of the upper swing body 2. Further, a bracket 4d is fixed above the shaft 4c of the base reader 4a, and one end of a hydraulic cylinder 15 for rotating the reader 4 back and forth is attached to the bracket 4d.
The other end of the hydraulic cylinder 15 is pivotally connected to a front portion of the upper swing body 2 by a pin 15b.

Pin holes 4e for fixing the tip leader 4b and the base reader 4a are formed in the side portions of the base leader 4a and the tip leader 4b at several places in the longitudinal direction. Further, a stopper 4f and a stopper 4i for stopping the mounting bracket 6 at appropriate upper and lower positions are fixed to the distal end leader 4b. Further, a stopper 4g for stopping the lowering of the tip leader 4b at an appropriate position below the base leader 4a and a stopper 4j (not shown) for stopping the raising of the tip leader 4b at an appropriate position above the base reader 4a are fixed. Have been.

The upper wire rope 16 of the two wire ropes, one end of which is fixed to the bracket 6 for mounting the auger drive motor 5 (or the bracket 6 for mounting the pile press-in device), is wound around the upper sheave roller 7. Thereafter, the lower wire rope 17 is wound around the lower sheave roller 8 after being wound up on one of the winding drums 10 c of the winding drum 10 provided on the upper swing body 2 and driven by the hydraulic motor 13. The lower drum 10d is wound around the lower drum 10d.

Next, the operation of the present invention will be described. First, in the movement between construction sites, when the hydraulic motor 13 is driven to rotate the winding drum 10 to the left (counterclockwise) in FIG. 3, the upper wire rope 16 is paid out from the one drum 10c. The lower wire rope 17 is wound by the other drum 10d. As a result, the bracket 6 for attaching the auger drive motor or the pile press-fitting device is lowered by the lower wire rope tension or its own weight, and the tip leader 4b
The tip leader 4b is lowered by its own weight, and is stopped by the stopper 4g fixed to the base leader 4a. When the length of the leader 4 becomes the shortest, the pin 4h is inserted into the pin hole 4e formed in the base leader 4a and the tip leader 4b, and the base cylinder 4a and the tip leader 4b are fixed. Then, the entire reader attachment rotates around the axis 4c, and enters the stored state as shown in FIG.

Next, at the time of construction, the hydraulic cylinder 15 is extended, and the leader 4 is made vertical. When the excavation depth is shallow or when the pile to be pressed is short, it is not necessary to extend the leader 4, if the leader 4 is in the minimum length, the earth auger is attached and the underground excavation is performed, or A pile is inserted and a pile is inserted.

On the other hand, when the excavation depth is deep or when the pile to be press-fitted is long, it is necessary to extend the leader 4, in which case the pin 4h fixing the base leader 4a and the tip leader 4b is required. When the take-up drum 10 is rotated clockwise in FIG. 3 by driving the hydraulic motor 13, the upper wire rope 16 is taken up by the one drum 10c, and the lower wire rope 17 is taken up by the other drum 10d.
It is paid out from. As a result, the bracket 6 for attaching the auger drive motor 5 (or the pile press-in device) rises, stops at the stopper 4i fixed to the tip leader 4b, and also rises with the tip leader 4b, and the stopper 4j fixed to the base leader 4a. (Not shown), the reader 4 is at its longest length.

In this state, a pin 4h is inserted into a hole 4e formed in the base reader 4a and the tip reader 4b, and the base auger 4a and the tip reader 4b are fixed. The winding drum 10 is shown in FIG.
When rotated to the left in, the upper wire rope 16
Is unwound from the one drum 10c, and the lower wire rope 17 is wound by the other drum 10d. As a result, the auger drive motor 5 or the bracket 6 for mounting the pile press-in device is lowered, and the underground excavation is started. A downward pressing force acts on the auger drive motor 5 (or pile press-in device) mounting bracket 6 via the lower wire rope 17 to secure a sufficient bite amount, enabling efficient excavation or press-fitting of piles. Become.

Next, referring to FIG. 6, a case will be described in which the upper revolving unit is turned without moving the lower traveling unit, thereby enabling a straight construction. First, the civil engineering / construction machine according to the present invention is placed at a predetermined position on a construction site,
It is installed so that the straight excavation direction is parallel to the traveling direction of the endless track of the undercarriage, drives the hydraulic motor 13 to obtain the required excavation depth, and rotates the winding drum 10 clockwise in FIG. The upper wire rope 16 is wound around the one drum 10c, and the lower wire rope 17 is unwound from the other drum 10d.
Is set to a predetermined height, the earth auger is mounted on the auger drive motor 5.

Thereafter, the stay extension hydraulic cylinder 14 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 driving motor 5 is driven, and the hydraulic motor 13 is driven to drive the winding drum 1
3, the upper wire rope 16 is unwound from the one drum 10c, and the lower wire rope 17 is wound up by the other drum 10d. As a result, the earth auger digs into the ground and starts excavation.

When a predetermined excavation depth is reached, the hydraulic motor 1
3, the winding drum 10 is rotated rightward in FIG. 3, and the hydraulic motor 13 is rotated rightward 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 14 is contracted. Thereafter, the same procedure is repeated to excavate to the excavation end point position Z. When the stay extension / contraction cylinder 14 is extended / contracted, the leader rotation hydraulic cylinder 15 must also be extended / contracted to hold the reader vertically.

With the configuration described in detail in the above embodiment,
On a narrow construction site, the upper revolving unit can be turned without turning the lower traveling unit, thereby enabling straight line construction, pushing excavation and press-in of piles, and moving between sites. It has a very remarkable effect, for example, it can be made easier.

[0023]

According to the present invention, it is possible to perform a straight line construction by rotating the upper revolving structure without moving the lower traveling structure, to perform excavation by pressing and press-fitting piles, There is an effect that the movement of the object can be facilitated.

[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 cross-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 view showing a running posture 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 Upper sheave roller 8 Lower sheave roller 10 Winding drum 13 Hydraulic motor 14 Hydraulic cylinder 15 Hydraulic cylinder 16 Upper wire rope 17 Lower wire rope A Excavation start position Z Excavation end position

Claims (3)

[Claims] 1. 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 press-fitting is mounted on a front portion of the upper revolving structure. A vertically extensible reader comprising a reader and a tip reader, and an auger drive motor or a pile press-fitting device mounting bracket is slidably provided on the tip reader, and an upper sheave roller is provided above the base reader. In addition, lower sheave rollers are arranged at the bottom, respectively,
The upper wire rope of the two wire ropes, one end of which is fixed to the auger drive motor or the bracket for mounting the pile press-fitting device, is wound around the upper sheave roller, and is provided on the upper swing body and driven by the hydraulic motor. 1 axis 2
After being wound up on one of the drums and the lower wire rope is wound around the lower sheave roller,
The lower drum is wound around the other drum of the one-shaft, two-drum, and the hydraulic motor is used to slide the telescopic extension of the leader and the auger drive motor or the pile mounting device mounting bracket through a wire rope to perform pressing excavation or press-fitting. Leader attachment for civil engineering and construction machinery, which is made possible. 2. The leader attachment, wherein a stay supporting the leader is a stay that can be extended and contracted in the front-rear direction, which is composed of a base stay and a tip stay, and the base stay is fixed to a front part of an upper revolving unit. 2. The construction position can be arbitrarily changed within a predetermined range by pivotally connecting one end of the tip stay to a lower portion of the base leader and performing expansion and contraction of the stay by a hydraulic cylinder. Leader attachment for civil engineering and construction machinery. 3. The device according to claim 1, wherein the reader attachment is configured to be
The civil engineering machine according to claim 1, wherein the hydraulic cylinder is capable of rotating the leader in a front-rear direction around a pivot point between the leader and the stay and storing the leader. 4. Leader attachment for construction machinery.