JPH10306675A - Leader attachment for civil engineering and construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform an efficient work even in a work wherein an excavation depth and a press-fit length of a pile are different. SOLUTION: A leader is constituted to be expandable through a base part leader 4a and a tip leader 4b and expansion and contraction of the leader are effected by a means, such as a rack 7. Further, sprockets 10 and 13 are respectively arranged at the upper part and the lower part of the tip leader 46, and two sets of chains 18 and 21 to lock one end at the bracket 6 side for mounting an auger drive motor are separately run around upper and lower sprockets 10 and 13. The other end is locked at a base part leader 4a and further, a stay to support the leader is expandable and contractible in a longitudinal direction by hydraulic cylinders 22 and 23.

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 has as its object to enable smooth construction in a narrow construction site. That is, while moving the upper revolving structure without moving the lower traveling structure, linear construction can be performed, and the length of the leader can be adjusted with one touch by the telescopic drive device. By enabling press-in excavation and press-in of piles, efficient work is possible even in constructions with different excavation depths and press-in lengths of piles, and civil engineering and construction that can be quickly moved between sites It is an object to provide a machine.

[0007]

In order to achieve the above object, the present invention has the following arrangement. According to the first aspect of the present invention, the upper revolving unit is pivotably mounted on the lower traveling unit,
In a civil engineering / construction machine equipped with a leader attachment capable of underground excavation or pile insertion at the front of the upper revolving superstructure, a leader is composed of a base leader and a tip leader, and is capable of extending and contracting in the longitudinal direction, so that the leader is extended and contracted. A driving means is provided at an appropriate position, an auger drive motor or a bracket for mounting a pile press-fitting device is slidably provided at the tip leader, an upper sprocket or roller is provided at an upper portion of the tip leader, and a lower sprocket or roller is provided at a lower portion. Respectively, and two sets of chains each having one end locked to the auger drive motor or the pile press-fitting device mounting bracket side are separately wound around the upper sprocket or roller and the lower sprocket or roller,
The other end is locked to the base reader side.

The invention according to claim 1 is characterized in that the auger drive motor or the bracket for mounting the pile press-fitting device is slid through the chain by extending and retracting the leader, thereby enabling pressing excavation or press-fitting. I have.

According to a second aspect of the present invention, there is provided a civil engineering 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 insertion is mounted on a front portion of the upper revolving structure. In a construction machine, a leader is composed of a base leader and a tip leader and is capable of extending and contracting in the longitudinal direction. A driving means for extending and retracting the leader is provided at an appropriate position, and an auger drive motor or a pile press-fitting device is attached to the tip leader. Two sets of brackets slidably provided, an upper sheave above the tip leader, a lower sheave below the lower leader, and one end locked to the auger drive motor or the pile mounting bracket mounting bracket side. Are separately wound around the upper sheave and the lower sheave, and the other ends are locked to the base leader side.

According to a third aspect of the present invention, as the extension / retraction driving means of the leader, a pinion fixed to a longitudinal direction of the tip leader, a pinion meshing with the rack, and a hydraulic motor for rotating the pinion are used as the base reader. It is characterized by being fixed to the upper part of the.

According to a fourth aspect of the present invention, the stay supporting the leader is constituted by a base stay and a tip stay, and is an extendable stay, and the base stay is fixed to the front part of the upper revolving unit. One end of the tip stay is pivotally attached to a lower portion of the base leader, and a hydraulic cylinder for extending and contracting the stay is provided. The present invention is characterized in that the work position can be arbitrarily changed within a predetermined range by extending and contracting the stay with a hydraulic cylinder.

Further, the invention according to claim 5 is characterized in that the reader is pivotable in the front-rear direction around a pivot point between the reader and the stay, and is retractable. The present invention
During traveling, the reader is shortened and turned to the stored state to facilitate movement.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a sectional side view of a reader attachment according to an embodiment of the present invention, and FIG. 2 is a rear view of the same. FIG. 3 shows a side view of a civil engineering / construction machine equipped with a leader attachment employing the present embodiment, and FIG.
FIG. FIG. 5 shows a rear view of a leader attachment according to another embodiment of the present invention, and FIG. 6 shows a running posture of a civil engineering / construction machine equipped with the leader attachment of the embodiment according to the present invention.

3 and 4, an upper revolving unit 2 is mounted on a lower traveling unit 1 so as to be pivotable. Upper revolving superstructure 2
An extensible stay 3 is fixed to the front of the device. An extensible reader 4 is pivotally attached to the tip of the stay 3 so as to be able to rotate back and forth. As shown in FIG. 4, the reader 4 includes a base reader 4a and a tip reader 4b, and is configured to be able to expand and contract in the longitudinal direction. Also, stay 3
As shown in FIG. 1, it is composed of a base stay 3a and a tip stay 3b, and is extendable. The base stay 3a is fixed to the front part of the upper revolving unit 2, and the tip of the tip stay 3b is pivotally mounted on a pivot 4c provided below the base leader 4a so as to be able to rotate back and forth.

In FIGS. 1 and 2, an auger drive motor 5 (or a pile press-fitting device) mounting bracket 6 is slidably mounted on the tip leader 4b. Further, a rack 7 is fixed in the longitudinal direction of the rear surface of the tip leader 4b over substantially the entire length of the tip leader 4b. Further, a pinion 8 meshing with the rack 7 is mounted on a motor shaft 9a of a hydraulic motor 9 fixedly mounted on the upper portion of the base leader 4a.
An upper sprocket 10 is provided above the tip leader 4b.
Are pivotally connected by a shaft 12 via a bracket 11, and a lower sprocket 13 is pivotally connected by a shaft 15 via a bracket 14 to a lower portion of the distal end leader 4b. The upper sprocket 10 and the lower sprocket 13
May be replaced by an upper roller and a lower roller, respectively.

On the other hand, a substantially U-shaped upper bracket 16 and a lower bracket 17 are fixed vertically at approximately the center of the base reader 4a, and one end of a lower chain 18 is fixed to the upper bracket 16 by fixing means 19. The other end of the lower chain 18 is hung around the lower sprocket 13 and then the upper end of an auger drive motor 5 (or pile press-in device) mounting bracket 6 slidably mounted on the tip leader 4b. 6a. On the other hand, the lower bracket 17
Upper chain 2 having one end locked by fixing means 20
After the other end of 1 is hung on the upper sprocket 10,
Lower end 6b of bracket 6 for mounting auger drive motor 5 (or pile press-in device) slidably mounted on tip reader 4b
It is locked to.

Further, one end of a hydraulic cylinder 22 for extending and retracting the stay 3 in the front-rear direction is attached to the tip stay 3b.
, And the cylinder portion of the hydraulic cylinder 22 is fixed to the front portion of the upper swing body 2. Also, the base reader 4
A bracket 4d is fixed above the shaft 4c of a, and one end of a hydraulic cylinder 23 for rotating the reader 4 back and forth is pivotally connected to the bracket 4d by a pin 23a. The other end of the hydraulic cylinder 23 is pivotally connected to a front portion of the upper swing body 2 via a bracket 24 by a pin 23b.

Next, the operation of the present invention will be described. First, in the movement between the construction sites, the pinion 8 mounted on the shaft 9a of the hydraulic motor 9 is rotated to the left in FIG. 1, and the tip leader 4b is slid to move the leader 4 to the shortest length. At the same time, the hydraulic cylinder 23 is expanded and contracted, and the entire reader attachment is turned around the shaft 4c and inclined to bring it into the storage state as shown in FIG.

Next, at the time of construction, the hydraulic cylinder 23 is extended, and the leader 4 is made vertical. Then, the pinion 8 mounted on the shaft 9a of the hydraulic motor 9 is rotated clockwise in FIG. 3 to extend the leader 4 to a predetermined length according to the excavation depth and the length of the pile to be press-fitted. At this time, at the same time, the upper sprocket 1 provided above the tip leader 4b
Since 0 is raised, the auger drive motor 5 (or the pile press-in device) mounting bracket 6 is also moved upward by the upper chain 21. Then, an earth auger is attached to the auger drive motor 5, or the auger drive motor 5 is removed, and a pile press-in device is attached to the bracket 6 to grip the pile.

In this state, when the pinion 8 mounted on the shaft 9a of the hydraulic motor 9 is rotated to the left in FIG. 1, the leader 4 contracts and the lower sprocket provided below the leading end 4b. Since the 13 is lowered, a downward pressing force acts on the bracket 6 for mounting the auger drive motor 5 (or the pile press-fitting device) via the lower chain 18, a sufficient bite amount can be secured, and efficient excavation or press-fitting of the pile is performed. Becomes possible.

Next, referring to FIG. 7, a description will be given of a case where a straight construction can be performed by turning the upper revolving structure without moving the lower traveling structure. First, the civil engineering / construction machine according to the present invention is constructed. It is installed so that a predetermined position on the site, that is, the straight excavation direction is parallel to the traveling direction of the endless track of the undercarriage. Next, the pinion 8 attached to the shaft 9a of the hydraulic motor 9 is rotated clockwise in FIG. 1 to set the auger drive motor 5 to a predetermined height in order to obtain a required excavation depth. Is mounted on the auger drive motor 5.

Thereafter, the stay extension / retraction hydraulic cylinder 22 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 the pinion 8 attached to the shaft 9a of the hydraulic motor 9 is rotated leftward in FIG. The auger drive motor 5 equipped with the earth auger descends, the earth auger digs into the ground, and starts excavation. When a predetermined excavation depth is reached, the pinion 8 mounted on the shaft 9a of the hydraulic motor 9 is rotated clockwise in FIG. 1 to extend the leader 4 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 cylinder 22 is reduced.

Thereafter, the same procedure is repeated to excavate to the excavation end point position Z. When the stay extension / contraction cylinder 22 is extended / contracted, the leader rotation hydraulic cylinder 23 also needs to be extended / contracted in order to hold the leader vertically.

According to this embodiment, the construction described in detail above enables straight construction by turning the upper revolving unit without moving the lower traveling unit in a narrow construction site. The length of the reader 4 can be adjusted with a single touch by driving a hydraulic motor via a rack and a pinion, and furthermore, pressing excavation and press-fitting of a pile can be performed by pressing through a sprocket (or a roller) 10 and a chain 18. In addition, the present invention has an extremely remarkable effect, such as enabling efficient work even in a construction in which the excavation depth and the press-fitting length of the pile are different, and enables quick movement between sites.

As described above, the embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment. Even changes in the design that do not depart from the gist of the present invention are included in the present invention. For example, although the case where the rack 7 and the pinion 8 are provided only on one side of the tip leader 4b is shown, the rack 7 and the pinion 8 may be provided on both sides of the tip leader 4b as shown in FIG. Also,
A sheave (pulley) may be used instead of the sprockets 10 and 13, and a wire rope may be used instead of the chain 18.

[0026]

According to the first aspect of the present invention, the length of the reader can be easily adjusted by the expansion and contraction driving of the reader.
Furthermore, since it is possible to press and excavate and press-fit a pile through a sprocket (or a roller) and a chain, there is an effect that efficient work is possible even in a construction in which the excavation depth and the press-fit length of the pile are different. . Further, according to the invention described in claim 3, there is an effect that the length of the reader can be adjusted with one touch by driving the hydraulic motor via the rack and the pinion for the above-mentioned work.

According to the fourth aspect of the present invention, in a narrow construction site, there is an effect that a straight construction can be performed by turning the upper revolving unit without moving the lower traveling unit. Further, the invention according to claim 5 has an effect that the movement between sites can be performed quickly.

[Brief description of the drawings]

FIG. 1 shows a cross-sectional side view of a reader attachment according to the present invention.

FIG. 2 shows a rear view of a reader attachment according to the present invention.

FIG. 3 shows a side view of a civil engineering / construction machine equipped with a reader attachment adopting the present invention.

FIG. 4 shows a front view of the civil engineering and construction machine shown in FIG.

FIG. 5 is a rear view of a reader attachment according to another embodiment of the present invention.

FIG. 6 shows a running posture of a civil engineering / construction machine equipped with a reader attachment adopting the present invention.

FIG. 7 shows a construction state 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 reader 5 Auger drive motor 6 Bracket 7 Rack (drive means) 8 Pinion (drive means) 9 Hydraulic motor (drive means) 10 Upper sprocket (roller, sheave) 13 Lower sprocket (roller, sheave) 16 Bracket 17 Bracket 18 Lower chain (wire rope) 21 Upper chain (wire rope) 22 Hydraulic cylinder 23 Hydraulic cylinder A Excavation start position Z Excavation end position

Claims (5)

[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. It is composed of a leader and a tip leader and is made extendable and contractible in the longitudinal direction. A driving means for extending and contracting the leader is provided at an appropriate position, and an auger driving motor or a bracket for mounting a pile press-fitting device is slidably provided on the tip leader. , An upper sprocket or roller is disposed above the tip leader, and a lower sprocket or roller is disposed below the leader,
Two sets of chains, one end of which is locked on the auger drive motor or the pile mounting device mounting bracket side, are separately wound around the upper sprocket or roller and the lower sprocket or roller, and the other end is locked on the base leader side. Leader attachment for civil engineering and construction machinery. 2. A civil engineering / construction machine in which an upper revolving structure 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. It is composed of a leader and a tip leader and is made extendable and contractible in the longitudinal direction. A driving means for extending and contracting the leader is provided at an appropriate position, and an auger driving motor or a bracket for mounting a pile press-fitting device is slidably provided on the tip leader. An upper sheave is provided above the tip leader, and a lower sheave is provided below the tip leader. Two sets of wire ropes, one end of which is engaged with the auger drive motor or the pile mounting device mounting bracket side, are connected to the upper sheave. And a lower sheave, and the other end is locked to a base leader side. 3. The expansion / contraction driving means of the leader, wherein a rack is fixed in a longitudinal direction of the tip leader, and a pinion meshing with the rack and a hydraulic motor for rotating the pinion are fixedly provided on the base leader. The leader attachment of the civil engineering / construction machine according to any one of claims 1 to 2, characterized in that: 4. A stay supporting the leader is constituted by a base stay and a tip stay, and is an extendable stay. The base stay is fixed to the front part of the upper revolving unit, and one end of the tip stay is connected to the base leader. 4. A leader attachment for a civil engineering / construction machine according to claim 1, further comprising a hydraulic cylinder pivotally attached to a lower portion of the bracket to expand and contract the stay. 5. The civil engineering work according to claim 1, wherein the leader is pivotable in the front-rear direction around a pivot point between the leader and the stay so that the leader can be stored. Construction machine reader attachment.