JPH0438278B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] A small diameter pipe propulsion method and method that enables small diameter pipes such as water and sewage pipes and gas pipes to be buried in a straight state without digging side ditches. This invention relates to the device.

[Conventional technology]

The adjustment body with a sloped part at the tip, which is installed inside the propulsion outer tube that constitutes the outer shape of the leading pipe, is operated in the shaft where the adjustment body operation tube alone is operated in the shaft where jacking operations are performed for the propulsion tube and the adjustment body operation tube. According to the degree of propulsion in the wrong direction, the inclined part is made to protrude from the front end surface of the outer propulsion tube, and the tip of the tip forming the inclined part is rotated to the opposite end of the incorrect direction, and the protruding state is maintained. By performing a jacking operation on the adjusting body together with the propulsion pipe in the shaft and giving a propulsion effect,
A small-diameter pipe long-distance precision propulsion method (Special Publications Showa) characterized by changing the direction course of the leading pipe in a desired direction in response to the earth pressure effect caused by the propulsion action, in accordance with the inclined portion and its protrusion amount. 57-49719)
Then, a linear outer tube whose tip is cut diagonally and sealed and a target plate is provided inside the propulsion tube is fitted to the outer circumference of the propulsion tube, and the tip of the propulsion tube is fitted onto the outer periphery of the propulsion tube, and the tip of the propulsion tube is moved straight for a certain length. The propulsion tube is moved forward while rotating by the buried tube that is always protruding from the outer tube, and the straight outer tube is buried forward together with the propulsion tube, and when a displacement is observed in the propulsion direction of the propulsion tube, the tip of the propulsion tube After rotating the slope of the propulsion tube in the opposite direction to the correcting direction and stopping the rotation, the propulsion tube is moved straight and the propulsion direction of the propulsion tube is corrected by receiving earth pressure on the slope, and then the propulsion tube is rotated forward again. A method for burying a small-diameter leading pipe for burying a humid pipe or the like (Japanese Patent Publication No. 55679/1983) is known.

[Problem that the invention seeks to solve]

All conventionally known propulsion methods and devices have problems such as the fact that they are wedge-shaped and require a considerable amount of rotational force to rotate.
The present invention seeks to solve this problem.

[Means for solving problems]

This invention has a conical part with the apex at the center as the head, and a vertical wall on the back side of the head of the direction correction cylinder, which is provided with a series of cylinders on the base. An eccentric hole centered at the point and an eccentric pressing rod formed protruding from the center at a point on a circular line having the same radius as the eccentricity d from the center on the front end surface of the pressing rod are engaged with the eccentric hole. A direction correction device, which is formed by connecting the direction correction cylinder and the inserted pressing rod in a swingable manner with a universal joint, is fixed to the tip of the inner tube of the propulsion tube, which is double-formed inside and outside. The center of the target with light emitting diodes attached at two locations, the center point and correction direction point, is aligned with the center point of the transit in the starting shaft, and the target is rotated and pushed forward. When the target center point deviates from the center line of propulsion, the target is propelled. Only the work is temporarily stopped, and only the rotation work is continued.
When the direction correction point is located on the symmetrical side away from the center point, the rotation of the inner tube also stops, and only the previously stopped propulsion operation is restarted, and by deflecting and pressing the direction correction tube, it is moved away from the center line. By displacing the direction of the direction correction tube that is oriented in the direction of deviation,
Return to the center line, press and propel until the target center point begins to face the propulsion center line, then restart the rotation operation, and if this causes excessive movement, repeat the above operations in order to reduce the It propels the bore tube.

In addition, the head is a conical part with the center as the apex,
In the upright wall on the back of the head of the direction correction cylinder, which has a series of cylinders on its base, there is an eccentric hole centered at one point on a circle with a radius of eccentricity d from the center, and on the front end surface of the pressing rod, there is an An eccentric pressing rod protruding from a point on a circle having the same radius as the eccentricity d is engaged with the eccentric hole, and the direction adjusting cylinder and the inserted pressing rod can be freely swung by a universal joint. A target with a light emitting diode attached at the center point and an intermediate position on the opposite side of the eccentric pressing rod is provided at the rear of the pressing rod, and the tip of the inner tube of the propulsion tube consisting of an inner and outer double tube is connected to the target. It is connected and fixed to the rear end of the pressing rod so as to be installed internally.

[Effect]

A propulsion tube in which a direction adjustment device formed by engaging an eccentric hole and an eccentric pressing rod on one side from a center point is formed double inside and outside of a direction adjustment tube in which a direction adjustment tube and a pressing rod are connected by a universal joint. The target is fixed to the tip of the inner tube of the press rod, and light emitting diodes are attached at two places, the center point on the rear surface of the pushing rod and the correction direction point.The target is rotated and pushed by aligning the center point of the transit of the starting shaft with the center point of the starting shaft. When the target center point deviates from the propulsion center line, propulsion is temporarily stopped, and when the direction correction point is located on the symmetrical side away from the center point, the rotation of the inner tube is stopped, the rotation is stopped and the propulsion is continued, and the direction After displacing the correction cylinder and pushing and propelling it until the target center point begins to face the propulsion center line, taking into account inertia, rotating and pushing it,
Thereafter, the pre-operation is repeated sequentially to propel the small-diameter pipe.

〔Example〕

The inner tube 1 and the outer tube 2 form a propulsion tube 3, and an eccentric pressing rod 4 whose tip is eccentric α to one side from the center point
A pressing rod 6 having a flat longitudinally elongated hole 5 bored in the rear part of the eccentric pressing rod 4 is fixed to the tip of the inner tube 1, and in addition, the tip is pointed in a conical shape, and A hollow direction adjusting tube 7 with an open rear end is formed, a pressing rod 6 is inserted into the direction adjusting tube 7, and a shaft 8 is loosely fitted through the elongated hole 5 to form a universal joint. Fix the correction tube 7,
Attach the O-ring 9 to the inside of the rear end of the direction-adjusting cylinder 7, fit the O-ring 9 into the annular groove 10 of the pressing rod 6, and make an eccentric hole 11 on one side of the inner front of the direction-adjusting cylinder 7 from the center. The eccentric pressing rod 4 is inserted and locked into the eccentric hole 11, and the center point on the rear surface of the pressing rod 6 and the intermediate position on the opposite side where the eccentric pressing rod 4 is provided are connected to a target 14 provided with light emitting diodes 12 and 13. At the same time, a series of auger screws 15 are wound around the outer periphery of the inner tube 1 and the pressing rod 6, and an auger screw 16 is also provided on the outer periphery of the direction adjusting cylinder 7. are connected by a universal joint formed by the elongated hole 5 and the shaft 8.
An airtight casing 17 is provided in the front part of the target 14, and a dry battery is installed inside, and light emitting diodes 12, 13 are installed.
It is connected to the wire and turned on.

According to the above-mentioned configuration, the present application has a propulsion device 19 installed in the starting vertical hole 18, a propulsion tube 3 attached to the propulsion device 19, a transit 20 installed at the rear of the propulsion device 19, and a center point 22 of the cross line 21 of the transit 20. The propulsion center line C is aligned with the light emitting diode 12 located at the center point of the target 14,
The propulsion pipe 3 is rotated and pushed forward, and the auger screws 16 and 15 take in earth and sand and carry it out to the starting hole. After stopping the propulsion when the center point of the target 14 deviates from the center line C to be propelled, the rotation of the inner tube 1 is stopped when the direction correction point is located on the symmetrical side away from the center point. That is, the light emitting diode 13 is positioned on the opposite side of the side where the light emitting diode 12 at the center of the target 14 is deviated from the center point 22 of the cross line 21 of the transit 20, and the rotation of the inner tube 1 is stopped. While the rotation is stopped, the propulsion tube 3 is pressed and propelled, and since the eccentric pressing rod 4 is fitted in the eccentric hole 11, the light emitting diode 1 is rotated.
Since the eccentric pressing rod 4 is located on the opposite side of the position 3, it operates to move the direction correction cylinder 7 toward the light emitting diode 13 by pressing it. Thereafter, while the rotation is stopped, the propulsion tube 3 is pressed and propelled to displace the direction correction tube 7, and the propulsion tube 3 is pressed and propelled until the light emitting diode 12 at the center point of the target 14 starts to face the center point 22 of the cross line 21 of the transit 20. The rotation operation is then restarted, and when an excessive movement occurs as a result, the above-mentioned operations are sequentially repeated to propel the small diameter tube.

Repeat the above steps to achieve the goal of linear propulsion. When the propulsion of the first propulsion tube 3 is completed, the propulsion tubes consisting only of the inner tube and the outer tube having an auger screw are added and buried straight up to the reaching vertical hole 23.

〔Effect of the invention〕

Since the direction correction cylinder is not wedge-shaped, there is little rotational reaction force, so rotational propulsion, rotational correction, or pressing propulsion can be performed with small rotational force.

[Brief explanation of drawings]

Figure 1 is a sectional view during operation, Figure 2 is a sectional view of the main parts of the device, and Figures 3 to 7 are sectional views of the main parts of the work process, with a rear view of the target on the right side. .

Claims (1)

[Scope of Claims] 1. A direction correction cylinder whose head is a conical part with its apex at the center and a series of cylinders at its base has a circular circle whose radius is an eccentricity d from the center on the vertical wall on the back of the head. An eccentric hole centered at one point on the line, and an eccentric pressing rod formed protruding from the center at a point on the circular line having the same radius as the eccentricity d from the center on the front end surface of the pressing rod are engaged with the eccentric hole. Then, the direction adjustment device, which is formed by connecting the direction adjustment tube and the inserted pressing rod so as to be able to swing freely through a universal joint, is fixed to the tip of the inner tube of the propulsion tube, which is formed double inside and outside. The center of the target with light emitting diodes attached at two places, the center point of the rear face and the correction direction point, was aligned with the center point of the transit of the starting shaft, and the target was rotated and pushed forward, and when the center point of the target deviated from the center line of propulsion. At this time, only the propulsion work is temporarily stopped, and only the rotation work is continued, and when the direction correction point is located on the symmetrical side away from the center point, the rotation of the inner tube is also stopped, and the propulsion work that was stopped first is By restarting the direction correction tube and pressing the direction correction tube, the direction of the direction correction tube, which is pointing in the direction of deviation from the center line, is displaced, so that the direction of the direction correction tube is returned to the center line, and the target center point is A small diameter pipe characterized by pushing and propelling the small diameter pipe until it starts to face the propulsion center line, then restarting the rotation operation, and when an excessive motion occurs as a result, repeating the above operations sequentially to propel the small diameter pipe. Caliber tube propulsion method. 2. On the vertical wall on the back of the head of a direction correction cylinder whose head is a conical part with its apex at the center and a series of cylinders at its base, place a point on a circle whose radius is eccentricity d from the center as the center. An eccentric press rod formed on the front end surface of the press rod to protrude from the center at a point on a circle having the same radius as the eccentricity d is engaged with the eccentric hole, and the direction correction cylinder is and the inserted pressing rod are swingably connected by a universal joint, and a target with a light emitting diode is installed at the center point at the rear of the pressing rod and at an intermediate position on the opposite side of the eccentric pressing rod, and a A small diameter tube propulsion device characterized in that the tip of an inner tube of a propulsion tube made of a tube is connected and fixed to the rear end of a pressing rod so as to accommodate the target.