JPH042237Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a propulsion device for burying small diameter pipes by a propulsion method.

[Prior Art] Fig. 2 shows a conventional propulsion machine for burying small diameter pipes, in which a base frame 2 is installed in a vertical shaft 1 recessed underground, and a guide provided on the base frame 2 is shown. A hume tube 4 to be buried on the frame 3 is mounted so as to be movable in the front and rear directions (left and right directions in the figure). A cutter head 7 having a cutter 6 at the tip is connected to the tip of the fume tube 4 via a rear pipe 5. An auger 9 surrounded by a trough 8 is inserted into the humid tube 4,
The tip of the trough 8 is connected to the cutter head 7, and the auger 9
The tips of the two are connected to the cutter 6, respectively. A cap 10 is removably attached to the rear end of the fume tube 4, and the rear end of the trough 8 is removably fixed to the cap 10, while the rear end of the auger 9 is attached to the cap 10. It penetrates and is detachably connected to the drive device 11 . Drive device 1
1 is placed on a propulsion receiving frame 12 having a U-shaped cross section and supported by a base frame 2 so as to be parallel to the left and right positions of the hume tube 4 so as to be movable back and forth. Further, a main push jack 13 is arranged in the U-shaped space of the propulsion receiving frame 12, and the head side end of the main push jack 13 is connected to the cap 10.
The end of the main pusher jack 13 on the rod side is detachably connected to the propulsion receiving frame 12.

To explain in detail the attachment and detachment between the rod side end of the main push jack 13 and the propulsion receiving frame 12, a vertical through hole 15 is bored in the clevis 14 at the rod end of the main push jack 13. On the other hand, set holes 16 are also provided in the upper and lower flanges of the propulsion receiving frame 12 at predetermined intervals in the longitudinal direction, and by inserting set pins 17 into both holes 15 and 16, the propulsion position of the main pusher jack 13 is set. It is becoming more and more common.

In such a configuration, when the pusher jack 13 is extended while driving the auger 9 and the cutter 6 by the drive device 11, the extension force of the pusher jack 13 becomes a propulsive force to move the cap 10, the fume pipe 4, The earth and sand excavated by the cutter 6 is transmitted to the cutter head 7 via the rear pipe 5, and the earth and sand excavated by the cutter 6 is transferred to the cutter head 7.
Since the fume tube 4 is conveyed to the rear by the cutter 6, the hume tube 4 enters the tunnel formed by the cutter 6. When the main push jack 13 has extended the predetermined stroke, the set pin 17 is removed from the holes 15 and 16, the main push jack 13 is retracted, and the through hole 15 of the clevis 14 is aligned with the set hole 16 of the propulsion receiving frame 12 located next to it. and insert the removed set pin 17 into the matched holes 15 and 16.
Insert the , then repeat the above operation,
The Huyum tube 4 is buried underground. After the first hume pipe 4 has been buried, the cap 10 is removed from the rear end of the hume pipe 4, the tip of the next hume pipe 4 is connected to the rear end of the buried front hume pipe 4, and the trough 8 is The auger 9 is also added, and the next humid pipe burying work is then carried out in the same manner.

[Problems to be Solved by the Invention] However, in the conventional method, since the pusher jack 13 is operated like an inchworm to sequentially change the propulsion base position, it is necessary to attach and detach the set pin 17. However, this attachment/detachment work had to be done manually, which was extremely troublesome.

In view of these circumstances, the present invention is designed to automatically attach and detach the set pin.

[Means for Solving the Problems] The present invention connects the front end of a main push jack to the rear end of a tube whose front end is connected to a cutter head, and connects the rear end clevis of the main push jack to a propulsion receiving frame. In a propulsion device that propels the pipe into the ground and buries it by sequentially removably transferring the pipe in accordance with the positions of set holes drilled at predetermined intervals, the rear end of the main push jack is A double rod is constructed in which hollow pin split bodies are slidably inserted facing each other into a through hole drilled in the clevis, and rods extend and contract in opposite directions from both ends of the main body within the pin split bodies. It has a structure in which a piston cylinder is provided, and the rods of the cylinders are each fixed to a pin segment so that when the rod is extended, the pin segment can fit into the set hole.

[Function] The pin segment that extends the rod protrudes from the clevis and fits into the set hole, while when the rod is contracted, the pin segment is drawn into the clevis. Therefore, the main push jack and the attachment and detachment of the propulsion frame are automatically performed.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

Figure 1 shows the main parts of the propulsion device of the present invention.
2 is a view corresponding to the − arrow view in FIG. 2. FIG.

Into the through hole 15 provided in the rod end clevis 14 of the main pusher jack 13, pin split bodies 18, 18 having a hollow structure with an opening at one end are slidably inserted, respectively, so that the openings face each other, and Torso 2
A double piston cylinder 20 in which a rod 19 expands and contracts in opposite directions from both ends of the piston cylinder 20 is disposed within the pin split bodies 18, 18, and each end of the rod 19 is fixed to the end plate of the pin split body 18. At the same time, the main body shell 21 is inserted into the through hole 1 of the clevis 14.
5 is fixed to the wall surface, and the pin split body 18 is configured to fit into the set hole 16 of the propulsion receiving frame 12 when both rods 19 are extended. In addition, 22
23 is a conduit for supplying pressure oil to the rod extrusion chamber in the main body shell 21, and a conduit 23 for supplying pressure oil to the rod retraction chamber.

In such a configuration, when pressure oil is supplied from the pipe line 22 into the body shell 21 of the duffle piston cylinder 20, the rods 19, 19 expand and the pin split body 1
8 and 18 project upward and downward. On the other hand, when pressure oil is supplied from the pipe line 23 into the main body shell 21, the rod 19,
19 contracts, and the pin division bodies 18, 18 are drawn into the through hole 15 of the clevis 14, respectively.

Therefore, when burying the humid pipe 4,
By expanding and contracting the rods 19, 19 of the double piston cylinder 20 in response to the expansion and contraction movement of the main push jack 13, the work of attaching and detaching the pin split body 18 and the set hole 16 of the propulsion receiving frame 12 is automatically performed. This makes it possible to speed up the work.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the invention] As explained above, according to the propulsion device of the invention, it is possible to automatically change the propulsion base end position of the pusher jack without human intervention, and the This has the excellent effect of speeding up the burying work.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of the propulsion device of the present invention, which corresponds to the - arrow direction in FIG. 2, and is an explanatory diagram of the conventional propulsion device shown in FIG. 2. 4 is a fume pipe, 6 is a cutter, 7 is a cutter head, 12 is a propulsion receiving frame, 13 is a main push jack, 14 is a clevis, 15 is a through hole, 16 is a set hole, 18 is a pin split body, 19 is a rod, 20
21 indicates a double piston cylinder, and 21 indicates a main body cylinder.

Claims (1)

[Scope of utility model registration request] Connect the front end of the main push jack to the rear end of the tube whose front end is connected to the cutter head, and connect the rear end clevis of the main push jack to the position of the set holes drilled at predetermined intervals in the propulsion receiving frame. In a propulsion device that propels the pipe into the ground and buries it by sequentially removably transferring the pipe, a hollow structure is provided in a through hole drilled in the rear end clevis of the main push jack. The pin split bodies are slidably inserted facing each other, and inside the pin split bodies,
A double piston cylinder is installed in which the rod expands and contracts in opposite directions from both ends of the main body,
The propulsion device is further characterized in that the rods of the cylinder are each fixed to a pin segment so that when the rod is extended, the pin segment can fit into the set hole.