JPH0330465Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotational position display device for a small-diameter tube propulsion machine that allows the direction of a guide body to be confirmed and easily corrected.

[Conventional technology]

When laying small-diameter pipes such as water and sewage pipes, gas pipes, and power cables underground, the common construction method is to cut and cut from the road surface, but this method requires a lot of labor and cost, such as traffic control measures. There is a problem,
Recently, underground propulsion construction methods using propulsion machines have been attempted.

This construction method involves digging a starting shaft and a destination shaft before and after the road surface where the pipe is to be laid, installing a propulsion machine in the starting shaft, and using the propulsion machine to propel a continuous rod leading body to form a pilot hole. This is to propel the laying pipe into the pilot hole.

[Problem that the invention attempts to solve]

In the propulsion machine, the rotating device rotates and consolidates the guide body (and rod), but errors may occur with respect to the planned excavation line, and the challenge is how to make corrections in such cases. It's summery.

Therefore, an object of the present invention is to provide a rotating device for a small diameter tube propulsion machine that is devised to facilitate direction correction of a guide body.

[Means for solving the problem] In order to achieve this objective, the present invention makes the tip of the guide body tapered and corrects the direction by operating a rotating device that chucks a rod that is threadedly connected to the guide body. The tapered surface of the guide body is placed on the side opposite to the desired direction, and a scale and a finger line for indicating the angle are marked on the case and socket of the rotating device.

[Effect]

By operating the rotation device, the taper position of the tip of the guide body can be easily determined from the angle display, and the direction can be easily corrected.

〔Example〕

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view of the propulsion device, Fig. 2 is a cross-sectional view of Fig. 1, and Fig. 3 is a partially cutaway view taken in the direction of the arrow in Fig. 2. , 4th
The figure is a perspective view showing the rotating device, Figure 5 is a cross-sectional view of Figure 4, and Figure 6 is a cross-sectional view of Figure 6. Figure 6 is a cross-sectional view of Figure 5. FIG. 4 is a front view showing only the front view, and FIG. 8 is an explanatory view of the direction correction work.

1 is a propulsion device. 2 is an under plate placed on the starting shaft, 3 is a middle plate attached to the under plate 2, 4 is a floor plate slidably attached to a guide bar 5 fixed to the middle plate 3, and 6 is attached to the under plate 2. A push plate is connected to the other end of the outrigger 7 attached at one end and is pressed to the front wall of the starting shaft, 8 is a pressure plate that is pressed to the rear wall of the starting shaft, and 9 is a link between the middle plate 3 and the floor plate 4. This is a propulsion cylinder that moves the floor plate 4 forward and backward.

Disposed on the floor plate 4 are a rotating device 10 for rotating the rod, a hook device 11 for preventing the rod from bending upward during propulsion, a locking device 12 for use when pulling out the rod, and the like.

13 is a guide body, 14 is a rod that is screwed onto the guide body 13, and one end of the rod 14 has a male thread.
A female thread is provided at the other end. The outer shape of the end of the rod on the side where the female screw is threaded is formed into a polygonal shape such as a quadrangular or hexagonal shape.

The rotating device 10 includes a case 21, a shaft 23 provided with a ratchet gear 22, sockets 24 and 25 attached to the shaft 23, an arm 26 rotatably attached to the shaft 23, and a ratchet gear attached to the arm 26. 22, a spring 28 that biases the claw 27, and a hydraulic cylinder 29 that connects the case 21 and the arm 26.
The sockets 24 and 25 are integrally constructed with the shaft 23 and attached to the case 21. Also sockets 24, 2
Grooves 24a and 25a formed in polygonal shapes such as quadrangular and hexagonal shapes are provided in the grooves 5, and the grooves 24a and 25a can be fitted into the polygonal end portion of the rod 14.

Angles are marked at equal intervals on the front (and back) of the case 21, and finger lines opposite to the angles are marked on the sockets 24 (and 25).

Reference numeral 21a denotes a mounting hole provided in the case 21, and is mounted to a mounting base 30 fixed on the floor plate 4 with a pin.

Next, its effect will be explained.

(1) Rotary consolidation excavation action When the hydraulic cylinder 29 is extended, the arm 26 rotates to the left, and the pawl 27 rotates the ratchet gear 22. Therefore, the shaft 23 and socket 24 also rotate, and the rod 14 rotates.

When the hydraulic cylinder 29 is retracted, the arm 26 rotates clockwise, and the pawl 27 separates from the ratchet gear 22. Therefore, the shaft 23 and socket 24 stop rotating, and the rod 14 also stops rotating.

The rod 14 is rotated by the rotating device 10, and the propulsion cylinder 9 is extended to advance the floor plate 4. When the hydraulic cylinder 29 retracts (rotation of the rod 14 stops), the propulsion cylinder 9 stops and the forward movement of the floor plate 4 stops.

By reversing and installing the rotating device 10, the rod 14 can be unscrewed. It can also be propelled backwards (in the case of rotational propulsion from the rear wall of the starting shaft).

(2) Attachment of the guide body 13 (and rod 14) Attach the rod 14 to the socket of the rotating device 10 with the tapered surface 13a of the guide body 13 facing upward (as shown in Figures 1 and 2). Make it fit.
At this time, the rotation angle of the guide body 13 is set to 0 degrees, and marks are made on the rod 14 in line with the finger lines marked on the sockets 24 and 25.

(3) Direction correction action The movement of the guide body 13 in the vertical direction or in the horizontal direction during the consolidation rotation propulsion is measured by an inclination sensor, electromagnetic waves, laser, etc. (Measurement of position) If an error occurs, the tip of the guide body is rotated by a rotating device so that the tapered surface 13a of the guide body 13 is on the opposite side to the direction to be corrected.

The propulsion cylinder 9 is expanded (while the rotation is stopped) to carry out compaction propulsion.

In Figure 8, a is consolidation rotational propulsion (moving straight)
state, b is the consolidated rotational propulsion state (occurrence of error), c
In this case, the tip of the guide body 13 is rotated so that the tapered surface 13a of the guide body 13 is on the opposite side to the direction to be corrected, and consolidation is promoted only by pushing without rotating the rod, and the earth pressure applied to the tapered surface 13a The leading body is bent in the opposite direction (error correction), and d is approximately at the target line when the tapered surface 1
3a is rotated to the opposite side to perform consolidation propulsion (fine error correction), and e is a consolidation rotary propulsion (end of error correction) condition.

[Effect of idea]

According to the present invention, since the indicator indicating the angle is provided on the case and socket of the rotating device in which the rod is chucked, the angle of the tapered position of the tip of the guide body can be easily determined, and the direction can be easily corrected.

[Brief explanation of drawings]

Fig. 1 is a plan view of the propulsion device, Fig. 2 is a cross-sectional view of Fig. 1, Fig. 3 is a partially cutaway view taken in the direction of the arrow in Fig. 2, and Fig. 4 is a perspective view showing the rotating device. , 5th
The figure shows a sectional view of FIG. 4, which is a sectional view of FIG. 6, a sectional view of FIG. 5, and a front view of FIG. 4 showing only the main parts. FIG. 8 is an explanatory diagram of the direction correction work. 1... Propulsion device, 10... Rotating device, 21... Case, 22... Ratchet gear, 24, 25...
socket.

Claims (1)

[Scope of utility model registration request] In a small-diameter tube propulsion machine equipped with a rotating device that compresses and rotates a leading body with a tapered surface, the ratchet gear is rotated and stopped by the expansion and contraction of a hydraulic cylinder, and is integrated with the ratchet gear and is threadedly connected to the leading body. Angles are marked at equal intervals on the case of a rotating device equipped with a socket that can be fitted with a rod, and markings opposite to the angles are marked on the socket, so that the rotational position angle of the tapered surface of the guide body can be known. A rotating position display device for small-diameter tube propulsion machines.