JPH0223672Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an excavator, which is a small diameter pipe propulsion machine.

Conventional technology A small-diameter pipe propulsion machine uses an excavator to excavate earth and sand at the top of the buried pipe, and then collects it at the end of the pipe to complete the propulsion work. It is very difficult to recover this excavation head (for example, from an existing manhole).

In the conventional recovery method, the excavation head is separated and recovered.

Problems that the invention aims to solve: For this reason, hydraulic hose electrical cables and internal parts of the head (e.g. targets, inclinometers, television cameras, etc.) may be damaged or contaminated with dirt, oil, water, etc.
It was also very difficult to reassemble.

The present invention was developed in view of the above circumstances, and its purpose is to collect the cutter drum 9, cutter drum cover 15, cutter plate 13, and excavation drum 17 from the landing port to the ground, and to remove the excavation head from the excavation head. The purpose is to eliminate the need to disassemble the excavating head body 1 by passing the body 1 through a buried pipe 25 and returning it to the starting port.

Means for Solving the Problems The present invention is to attach the pilot pipe 7, cutter drum 9, and cutter drum cover 15 to the excavation head main body 1, which has an outer diameter smaller than the inner diameter of the buried pipe 25, by bolts 8, 11, and 16. Detachably installed,
A cutter plate 13 with cutter teeth 12 is removably attached to the cutter drum 9 with bolts 14, and an excavation drum 17 is removably attached to the cutter drum cover 15 with bolts 19. , 11, and 16, and remove the pilot pipe 7, cutter drum 9, and cutter drum cover 15 from the excavation head main body 1. At the same time, remove the bolts 14, 19, and remove the cutter plate 13 and excavation drum 17. The drum cover 15, cutter plate 13, and excavation drum 17 are recovered from the ground through the arrival port, and the excavation head body 1 is passed through the buried pipe 25 and returned to the starting port.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Reference numeral 1 designates an excavation head body, and a pilot tube attachment part 2 is formed at the center of the front end of the excavation head body 1, and a cutter drum attachment part 3 is formed at the outer periphery of the tip of the excavation head body 1. A cutter drum cover attachment part 4 is formed at the front end of the excavation head body 1, and a vibration prevention plate attachment part 5 is formed at the rear end of the excavation head body 1. A wire connecting body 6 is attached to the center of the rear end of the wire.

The base end of a pilot tube 7 is attached to the pilot tube attachment portion 2 of the excavation head body 1 with bolts 8, and the rear plate portion 10 of the cutter drum 9 is attached to the cutter drum attachment portion 3 with bolts 11. . A cutter plate 13 having cutter teeth 12 is attached to the front surface of the cutter drum 9 with bolts 14.

Further, a cutter drum cover 15 is attached to the cutter drum cover attachment portion 4 with bolts 16, and a front portion 18 of an excavation drum 17 is attached to this cutter drum cover 15 with bolts 19. Further, a vibration prevention plate 20 is attached to the vibration prevention plate mounting portion 5 with bolts 21.
The outer peripheral surface 21 of the vibration prevention plate 20 is in contact with the inner peripheral surface 23 of the ring member 22 at the rear end of the excavation drum 17.

The excavating drum 17 can be divided into front and rear parts at its center, and its front side part 17a and rear side part 17b are connected by a connecting bolt 24.

The excavation head main body 1 is made smaller than the inner diameter of the buried pipe 25.

The cutter drum 9 is rotated by the driving part of the excavation head main body 1, and the cutter teeth 12 are rotated to propel the cutter drum 9 while excavating the earth and sand. from the cutter drum 9, and remove the bolts 11, 16, 19 to remove the cutter drum 9 and the cutter drum cover 15,
Remove the excavation drum 17 from the excavation head main body 1, remove the connecting bolt 24, and move the excavation drum 17 forward.
Split later.

Then, cutter plate 13, cutter drum 9, cutter drum cover 15, excavation drum 1
7 to the ground from the arrival port, and remove the excavation head body 1.
The inside of the buried pipe 25 is pulled back to the starting port side using the wire rope 26.

Effects of the invention Since the invention is as described above, the bolts 8, 11, and 16 are removed at the access port, and the pilot pipe 7, cutter drum 9, and cutter drum cover 15 are removed from the excavation head body 1, and the bolts 14,
19, remove the cutter plate 13 and the excavation drum 17, collect the cutter drum 9, cutter drum cover 15, cutter plate 13, and excavation drum 17 from the ground through the access port, and insert the excavation head body 1 into the buried pipe 25. It can be pulled back to the starting gate through.

For this reason, there is no need to disassemble the excavation head body 1, and damage to hydraulic hoses, electric cables, and internal parts of the head and contamination by dirt, oil, water, etc. is eliminated.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view of an embodiment of the present invention. 1 is the excavation head body, 7 is the pilot pipe, 8,
11, 14, 16, 19 are bolts, 9 is a cutter drum, 13 is a cutter plate, 15 is a cutter drum cover, and 17 is an excavation drum.

Claims (1)

[Scope of utility model registration request] The pilot pipe 7, cutter drum 9, and cutter drum cover 15 are attached to the excavation head body 1, which has an outer diameter smaller than the inner diameter of the buried pipe 25, by bolts 8,
11 and 16, and a cutter plate 13 with cutter teeth 12 is removably attached to the cutter drum 9 with bolts 14.
This excavator is a pipe propulsion machine, characterized in that an excavation drum 17 is detachably attached to a cutter drum cover 15 with bolts 19.