JP3532402B2 - Construction machinery with leader - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine having a leader such as a leader-type earth drill, and more particularly to improving work efficiency during disassembly and transportation and assembly.

[0002]

2. Description of the Related Art A leader-type earth drill holds a leader in a vertical state during work and raises and lowers a drilling device along the leader to perform drilling. The leader is supported by the main body by the backstay cylinder, and is undulated by the expansion and contraction of the backstay cylinder. When transporting the ground drill,
Extend the backstay cylinder to tilt the leader horizontally, then separate the leader from the body and transport it separately. The back stay cylinder is also separated from the leader and the main body and transported separately.

[0003]

However, when the backstay cylinder is separated from the leader, both the main body side of the cylinder and the leader side need to be separated (the work of removing a plurality of connecting pins).
Also, if a hydraulic hose for supplying pressure oil from the main body to the back stay cylinder is arranged along the leader, disconnect the hydraulic hose from the main body side and at the same time connect the hydraulic hose to the cylinder side. Also needs to be separated. Similarly, at the time of assembly, a connecting work using a plurality of connecting pins and a hydraulic hose attaching work are required. Especially when a tandem cylinder having piston rods on both ends is used as the back stay cylinder, further work is required. In other words, in the tandem cylinder, since the tips of both piston rods are connected to the leader and the main body respectively, it is necessary to provide a rotation stopper to prevent the cylinder tube between them from rotating. Installation work must also be done. In such a configuration in which the backstay cylinder and the leader are transported separately, there is a problem that disassembling and assembling require a lot of time and work efficiency is poor.

An object of the present invention is to provide a construction machine having a leader which improves the work efficiency when disassembling and assembling the construction machine.

[0005]

The construction machine body 10 according to the present invention will be described with reference to the drawings showing an embodiment.
A leader 1 provided so as to be capable of undulating, and a cylinder 2 which is connected at both ends to the leader 1 and the main body 10 and which undulates the leader 1 by expansion and contraction. The leader 1 is separated from the main body 10 during transportation. Applied to machines. The leader 1 is provided with a stand 6 for fixedly holding the cylinder 2 whose one end is separated from the main body 10 during disassembly and transportation, and a mounting seat 1a to which the stand is fixed. It is fixed to the mounting seat 1a with bolts 7 and is configured to support the cylinder at the tip side. In the invention of claim 2, the stand 6 is detachably attached to the reader 1. According to the third aspect of the invention, the stand 6 is provided with a tube holding portion 6b for holding the tube 2a of the cylinder 2 and a piston fixing portion 6e for fixing the piston rod 2b in a non-expandable manner.
According to the invention of claim 4, when the leader 1 is connected to the main body 10 at the time of assembly and the cylinder 2 held by the leader 1 is extended by the stand 6, the one end side connecting portion of the cylinder 2 is connected to the cylinder connecting portion 11a of the main body 10. The height of the stand 6 and the attachment position to the reader 1 are determined so that the stand 6 can be reached.

Incidentally, in the section of means for solving the above problems for explaining the constitution of the present invention, the drawings of the embodiments are used for the purpose of making the present invention easy to understand. It is not limited to.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view of the leader type ground drill, and FIG. 2 is a view seen from the direction A in FIG. A leader 1 is rotatably connected to an upper swing body 11 of the earth drill main body 10, and the leader 1 is undulated by a pair of left and right backstay cylinders 2. As the back stay cylinder 2, a tandem cylinder having a cylinder tube 2a and piston rods 2b and 2c which can extend and contract from both ends thereof is used. The tip of one piston rod 2b is rotatably connected to the cylinder connecting portion 11a of the upper swing body 11 via the pin 3, and the tip of the other piston rod 2c is a cylinder connecting portion 1b provided at the tip of the leader 1.
Is rotatably connected via a pin 4.

Since the piston rods 2b and 2c of the backstay cylinder 2 are connected to the main body 10 and the leader 1 as described above, the tube 2a may rotate as it is. Therefore, in the present embodiment, the cylinder rotation stopper 5 is attached as shown in FIG.
The rotation of a is prevented.

FIG. 3 is a view showing a state in which the leader 1 is separated from the upper swing body 11, and FIG. 4 is a partially enlarged view thereof.
The leader 1 has a pair of stands 6 for fixing and holding a pair of backstay cylinders 2 to the leader 1, respectively.
Is detachably attached. A flange 6a is formed on the lower end of each stand 6, while the leader 1 has a seat 1a.
a is provided so as to project to the left and right, and a pair of stands 6
The flanges 6a are screwed to the left and right seats 1a by bolts 7, respectively. A cradle 6b is provided at the upper end of each stand 6.
A (tube holding portion) is formed, and the tube 2a of the backstay cylinder 2 is placed there. An arm portion 6d is rotatably connected to the stand 6 via a bracket 6c, and a bifurcated bracket 6e (piston fixing portion) is attached to the tip of the arm portion 6d as shown in FIG. The piston rod 2b of the cylinder 2 is connected.

In the earth drill constructed as described above, the leader 1 is raised vertically during excavation work,
A drilling device (not shown) is moved up and down along the leader 1.
For transportation, disassemble the ground drill according to the following procedure.
First, the pair of back stay cylinders 2 is extended to rotate the leader 1 to a horizontal state as shown in FIG. 1, and the pair of stands 6 (FIG. 3) is attached to the leader 1. The tubes 2a of the pair of backstay cylinders 2 are respectively placed on the receiving bases 6b of both stands 6, and in this state, the pins 3 are pulled out to disconnect the piston rods 2b from the connecting portions 11a of the upper swing body 11, The piston rod 2b is contracted. Then, the bracket 6e of the stand 6 is used to attach the piston rod 2b.
One end is sandwiched and the fixing pin 8 is penetrated, and then the retaining pin 9 (FIG. 5) is inserted and fixed. In this state, if the leader 1 and the upper swing body 11 are separated, transportation becomes possible.

According to the above procedure, the backstay cylinder 2 is fixedly held by the leader 1 while keeping the angle shown in FIG. Unlike the conventional case where the cylinder 2 is separated from the leader 1, the piston rod 2c
There is no need to disconnect the leader and leader 1. Further, when a hydraulic hose (not shown) for supplying pressure oil to the backstay cylinder 2 is arranged along the leader 1, it is sufficient to disconnect only the connection on the main body side of the hose and disconnect it from the cylinder tube 2a. No need. Further, it is not necessary to remove the rotation stopper 5 of the cylinder 2. Therefore, the work efficiency at the time of disassembly is significantly improved as compared with the conventional case.

The leader 1 is transported separately from the main body in a state in which the cylinder 2 is fixed, but since both piston rods 2b and 2c of the cylinder 2 are fixed to the leader 1,
It does not undesirably stretch during shipping. Further, since the piston rod 2b is fixed by the pin 8 and the retaining pin 9, there is no rattling due to vibration.

When assembling the ground drill at the construction site, the leader 1 is placed in the horizontal state (the state shown in FIG. 1), the base end portion of which is connected to the upper revolving structure 11 of the main body 10 and is placed on the leader 1. A hydraulic hose for supplying pressure oil to the backstay cylinder is connected to the main body. Next, pressure oil is supplied to the backstay cylinder 2 to supply the piston rod 2
Stretch b. The cylinder 2 is mounted on the stand 6 as shown in FIG.
Since the piston rod 2b is held as it is, the tip of the piston rod 2b reaches the cylinder connecting portion 11b of the upper revolving structure 11 just by extending the piston rod 2b, and the piston rod 2b and the connecting portion 11b can be connected immediately. When the stand 6 is detached from the leader 1 after the connection and the cylinder 2 is contracted, the leader 1 is awakened and is in a posture capable of excavation work.
In this way, at the time of assembly, only one end side (main body side) of the cylinder 2 needs to be connected, and the work of connecting the hydraulic hose and the cylinder 2 and the work of mounting the cylinder rotation stopper 5 are unnecessary. Greatly improves efficiency.

The shape of the stand is not limited to that of the embodiment. For example, as shown in FIG. 6, a stand 60 for fixing only the piston rod 2b of the cylinder 2 may be used. Further, although the example in which the stand is attachable to and detachable from the reader 1 is shown, the stand may be fixedly provided to the reader 1. Furthermore, although a leader-type ground drill has been described above, the present invention can be applied to other construction machines having a leader, such as a pile driver.

[0015]

According to the present invention, when the construction machine is transported, the cylinder, one end of which is separated from the main body, is fixed to the leader by the stand. Therefore, it can be disassembled / compared with the conventional case where the leader and the cylinder are separated. Assembly work efficiency is greatly improved. If the stand is provided with a tube holding part that holds the cylinder tube and a piston fixing part that fixes the piston rod so that it cannot expand and contract, the cylinder holding tube can be held by disconnecting the piston fixing part from the piston rod during assembly. Since the piston rod can be extended while being held in the section, the work of connecting the piston rod to the main body can be easily performed. Particularly, if the height and the mounting position of the stand are determined so that the connecting portion reaches the cylinder connecting portion of the main body only by extending the piston rod, the connecting work becomes easier.

[Brief description of drawings]

FIG. 1 is a side view of a leader-type ground drill according to an embodiment of the present invention.

FIG. 2 is a plan view seen from the direction A in FIG.

FIG. 3 is a side view showing a state in which a cylinder 2 is fixedly held on a leader 1 by a stand 6.

FIG. 4 is a partially enlarged view of FIG.

FIG. 5 is a view seen from the direction B in FIG.

FIG. 6 is a diagram illustrating a leader fixing method according to another embodiment.

[Explanation of symbols]

1 leader 1a seat 1b Cylinder connection part 2 Back stay cylinder 2a cylinder tube 2b, 2c piston rod 5 Cylinder rotation stop 6 stand 6a flange 6b cradle 6d arm 6e bracket 10 Construction machine body 11 Upper revolving structure 11a Cylinder connection part

Claims (4)

(57) [Claims] 1. A main body of a construction machine, comprising a leader that can be undulated, and a cylinder that is connected at both ends to the leader and the main body and that folds the leader by expansion and contraction. In the construction machine configured to be separated from the main body, one end of the leader is detached from the main body during disassembly and transportation.
A stand for fixedly holding the separated cylinder,
A mounting seat to which the stand is fixed is provided, and the base of the stand is fixed to the mounting seat with a bolt.
Fixed and configured to support the cylinder on the tip side
Construction machine having a leader, characterized in that that. 2. The construction machine having a leader according to claim 1, wherein the stand is detachably attached to the leader. 3. The stand according to claim 1, wherein the stand has a tube holding portion that holds the tube of the cylinder, and a piston fixing portion that fixes the piston rod in a non-expandable manner. Construction machinery with the leader of. 4. When the leader is connected to the main body at the time of assembly and the cylinder held by the leader by the stand is extended, the one end side connecting portion of the cylinder reaches the cylinder connecting portion of the main body. The construction machine having a leader according to any one of claims 1 to 3, wherein a height and a mounting position on the leader are determined.