JPH0519377Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a soil improvement machine, and particularly to a soil improvement machine having a swivel joint connected to the upper end of a screw shaft.

[Conventional technology]

Generally, in a soil improvement machine, the lower part of the leader is pivotally attached to the front part of the work equipment, and is supported by a back stay so that it can be raised and lowered. Rotating a pipe-shaped screw shaft having
Excavation work is carried out using the drilling tool at the lower end of the screw shaft, and the injection hose for ground improvement agent pumped from the batchia plant is connected to the upper end of the screw shaft via a swivel joint, and excavation is performed inside the excavated hole. Work is done by injecting the soil improvement agent from the tip of the tool and stirring to harden the soil improvement agent.

During this work, in order to prevent the swivel joint from twisting around due to the rotation of the screw shaft and damaging the injection hose, the swivel joint must be hung from a separate crane hook, or it must be hung from a rope. It was tied to a rope and held by a person for support.

[Problem that the invention attempts to solve]

For this reason, the device became large-scale and required manpower.

Therefore, an object of the present invention is to provide a ground improvement machine that prevents the swivel joint from spinning by adding a simple device.

[Means for solving problems]

In order to achieve the above object, the present invention provides a screw drive device that can be raised and lowered on a leader installed upright on a working machine, and a swivel joint for a ground improvement agent injection hose to the upper end of the screw shaft that is rotated by the screw drive device. In the ground improvement machine connected through the leader, arms were protruded on both sides of the swivel joint, cable members were connected to the tips of both arms, and both cable members were stretched through a sheave provided at the rear of the leader. It is characterized by

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 4.

The self-propelled ground improvement machine 1 has a lower part of a leader 3 pivotally attached to the front part of a working machine 2, the leader 3 is supported by a backstay 4 so as to be able to raise and lower, and a screw drive device 5 is installed in the front part of the leader 3. The excavation work is carried out using the excavation tool 7 at the lower end of the screw shaft 6 which is movable up and down and rotated by the screw drive device 5.
An injection hose 9 for a soil improvement agent pumped from an on-vehicle batcher plant 8 is connected to the upper end of the screw shaft 6 via a swivel joint 10, and the tip of the drilling tool 7 is inserted into the excavated hole H for soil improvement. The work is carried out by stirring the soil improvement agent with a stirring blade 11 while injecting it to harden the soil improvement agent.

The swivel joint 10 is provided with arms 12a and 12b that protrude horizontally from side to side on both sides.On the other hand, a stay 13 is pivotally attached to the rear of the leader 3 so as to be able to rotate up and down, and a sub stay 14 is used to horizontally The arm 12 of the swivel joint 10 is supported at the tip of the stay 13.
Arms 15a and 15b are provided parallel to a and 12b.

A sheave 16 is installed at the tip of the arms 15a and 15b.
a, 16b, sheaves 16c, 16 near the center
wire ropes 17 and 18 are connected to the tips of the arms 12a and 12b of the swivel joint 10, respectively, and the wire ropes 17 and 18
Both wire ropes 17,
18 is stretched by a weight 19 suspended from the lower end.

With this configuration, even if the swivel joint 10 tries to turn around due to the screw shaft 6 rotated by the screw drive device 5, the wire ropes 17 and 18 interfere with each other, preventing the rotation of the swivel joint 10. prevent.

In addition, when raising and lowering the screw shaft 6 during excavation work, the weight 19 is attached to the wire rope 17,
The wire ropes 17 and 18 may be set to a predetermined length so that the wire ropes 17 and 18 are suspended from the wire rope 18 and move up and down.

5 and 6 show a second embodiment of the present invention, in which the leader 3 is provided with a tensioning device 20 having a built-in spring, and the wire ropes 17 and 18 are wound around the reel of the tensioning device 20. Then, the wire ropes 17 and 18 are stretched.

Further, FIG. 7 shows a third embodiment, in which sheaves 21a and 21b are provided at the rear end of the stay 13, and wire ropes 17 and 18 are stretched using weights or tension devices.

In the above embodiments, the wire ropes 17, 18 are connected to the arms 12a, 12b, but the same effect can be obtained by using rope-like members such as chain, hemp rope, nylon rope, etc.

[Effect of idea]

As described above, the present invention has arms protruding from both sides of the swivel joint that is connected to the upper end of the screw shaft of the soil improvement machine, cable members are connected to the tips of both arms, and both cable members are connected to the leader. Since it is stretched through a sheave installed at the rear, it is possible to prevent the swivel joint from rotating along with the screw shaft due to interference between both cable-like members, which saves labor by adding a simple device. It can be used as a ground improvement machine.

[Brief explanation of drawings]

Figure 1 is a front view of the soil improvement machine, Figure 2 is a front view of the soil improvement machine and vehicle-mounted butcher plant, Figures 3 and 4 show the first embodiment of the present invention, and Figure 3 is a front view of the soil improvement machine. A plan view of the main parts, FIG. 4 is a front view, FIGS. 5 and 6 show the second embodiment, FIG. 5 is a plan view, and FIG. 6 is a front view.
The figure is a front view, and FIG. 7 is a plan view of the third embodiment. 1... Ground improvement machine, 2... Work equipment, 3... Leader, 5... Screw drive device, 6... Screw shaft, 8... Vehicle-mounted butcher plant, 1
0...Swivel joint, 12a, 12b...
Arm, 13... Stay, 15a, 15b... Arm, 16a, 16b, 16c... Sheave, 1
7,18...wire rope, 19...weight,
20... tension device.

Claims (1)

[Scope of utility model registration request] A soil improvement machine in which a screw drive device is installed on a leader installed upright on a work machine so as to be able to rise and fall, and a soil improvement agent injection hose is connected to the upper end of the screw shaft rotated by the screw drive device via a swivel joint, A ground improvement machine characterized in that arms protrude from both sides of the swivel joint, cable-like members are connected to the tips of both arms, and both cable-like members are stretched through a sheave provided at the rear of the leader.