JPH026154Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a leading device for a small-diameter pipe burying machine for burying small-diameter pipes such as gas and water pipes underground.

(Prior Art) As shown in FIG. 3, the conventional small-diameter pipe burying machine has a burying machine a installed in a hole e made in the ground, and a drive installed above the burying machine a. The rod c, which is jointed and connected by a hydraulic cylinder b, is advanced and retreated into the ground, and a leading device d consisting of a leading body with a circular cross section is fixed to the tip of the rod c, and the rod c is guided through the rod c. The device d is pushed into the ground and a hole is drilled for the pipe, and when the leading device d reaches the hole e on the left side of the figure, it is removed from the tip of the rod, and a small diameter pipe (not shown) is connected to the tip of the rod by an appropriate means. Then, move the rod c back toward the burying machine a side (right side in the figure) and bury the small diameter pipe in the pipe burying hole, or connect the small diameter pipe to the front of the burying machine a instead of the connecting rod. , the small diameter pipe is pushed into the pipe embedding hole and buried.

(Problems with the prior art) In the conventional guide device of the small-diameter pipe burying machine, the guide device d
The direction of the load applied to the tip side of the pipe changes, and the leading device d is deflected and pushed in either the left or right or up and down directions, making it impossible to avoid bending the pipe burial hole and making it difficult to reach the target. There is a drawback that causes a decrease in efficiency in small diameter pipe burying work.

(Purpose of the invention, means for solving problems) This invention is a invention to deal with the above-mentioned problems in the leading device of the conventional small-diameter pipe burying machine. In the leading device of a small-diameter pipe burying machine, which is fixedly attached to the tip of a connecting rod, the middle part of the oscillator is rotatably connected to the tip of the fixed tube, which is attached to the tip of the rod. , the proximal end side of the rocking body is connected to the piston rod end of the adjusting hydraulic cylinder fixedly installed in the fixed pipe through an oblique oblong hole and a pin loosely fitted in the oblique oblong hole, The structure is characterized in that the mechanism for adjusting the inclination of the oscillating body is one-way inclination adjustment of the protruding tip of the oscillating body using a hydraulic cylinder and rotational adjustment of the rod, and the oscillating body is provided with a oscillating body provided in a fixed tube at the tip of the rod. By configuring the projecting tip of the moving object to be adjusted in one direction by adjusting the inclination using an adjusting hydraulic cylinder and by adjusting the rotation of the rod, the accuracy of adjusting the inclination angle of the leading device is improved using a simple mechanism, and the ability to correct the propulsion direction is improved. It is an object of the present invention to provide a leading device for a small-diameter pipe burying machine that significantly improves the performance and eliminates the above-mentioned conventional drawbacks.

(Example of the invention) An embodiment of the invention is shown in Figs. 1A and B, and C in the figure shows the forward and backward movement by the driving hydraulic cylinder b of the small diameter pipe burying machine a shown in Fig. 1. A fixed tube 1 is integrally connected to the tip of the rod c by screwing, and a rocking body 3 is inserted into the tip of the fixed tube 1. The intermediate portion is rotatably connected by a spherical bushing 4 and a bushing seat 5, and is further connected to a fixed pipe 1.
An adjustment hydraulic cylinder 2 is fixedly installed and housed therein, and a diagonal elongated hole 6 is provided on the base end side of the rocking body 3, and a diagonal elongated hole 6 is provided at an angle with respect to the axis. A fixed pin 7 is movably fitted loosely into the oblique hole 6, and the end 2a of the piston rod of the adjusting hydraulic cylinder 2 and the base end 3b of the rocking body 3 are connected to the oblique hole 6 and the pin 7. When the adjustment hydraulic cylinder 2 is shortened, the protruding tip 3a of the oscillator 3 is extended and fixed on the axis of the fixed tube 1, and when it is extended conversely, the pin in the oblique hole 6 is As the fitting position of the rocker 7 changes, the protruding tip 3a of the rocking body 3 is rotated and fixed (clockwise) to the chain line position shown in FIG. 1A, thereby making it possible to adjust the inclination. Furthermore, the rocking body 3
As shown in FIG. 1B, the stopper pins 8, 8 screwed onto the fixed tube 1 side are in contact with the side surfaces 3c, 3c provided on the proximal end side, and the stopper pins 8, 8 are screwed onto the fixed tube 1 side, so that the stopper pins 8, 8 are in contact only in one direction with respect to the fixed tube 1. The rod c is rotatably attached to the small diameter pipe burying machine a by an appropriate mechanism (not shown), and the swinging body 3 is controlled by the adjusting hydraulic cylinder 2. The inclination adjustment mechanism is configured to adjust the inclination angle and direction of the protrusion tip 3a by adjusting the inclination in one direction of the protrusion tip 3a and adjusting the rotation of the rod.

(Function) The embodiment of the present invention has the above-mentioned configuration, and when the adjusting hydraulic cylinder 2 is shortened, the axis of the oscillator 3 shifts further to the fixed tube 1 as shown by the solid line in FIG. 1A. When the rod c is aligned and fixed on the axis of the rod c, it assumes the normal straight-ahead posture, and when it is extended conversely, the fitting position of the pin 7 on the adjustment hydraulic cylinder 2 side in the oblique oblong hole 6 on the rocking body 3 side changes. Accordingly, the protruding tip 3a of the rocking body 3 is adjusted and fixed to the chain line position shown in FIG. , the oscillator 3 with respect to the axis of the rod c.
The inclination angle and direction of the protruding tip 3a can be freely adjusted and fixed.

As shown in FIG. 2, A is a normal propulsion state, and when a deviation occurs in the propulsion direction as shown in B when pushing forward in the propulsion state A, the swinging body of the leading device 3 is moved as shown in C. By tilting and pushing forward, the propulsion deviation can be corrected and eliminated, and when the rocking body 3 reaches the normal propulsion position, the tilt of the rocking body 3 is eliminated at D and the normal propulsion state E is pushed forward. , the propulsion direction can be easily corrected.

(Effects of the invention) As described above, in the present invention, a fixed tube is provided at the tip of the joint or connection rod, and the intermediate portion of the rocking body is rotatably connected to the tip of the fixed tube via a spherical bush. The base end of the oscillator is connected to the piston rod end of the adjustment hydraulic cylinder fixedly installed in the fixed pipe through an oblique elongated hole and a pin loosely fitted in the oblique elongated hole, and the adjustment The structure is such that the inclination of the oscillating body (protruding tip) is adjusted and fixed by the expansion and contraction of the hydraulic cylinder and the rotation of the rod, so the propulsion trajectory can be modified extremely easily by adjusting the inclination of the oscillating body. In addition, the inclination adjustment of the rocking body by the adjustment hydraulic cylinder can be performed accurately by the simple mechanism as described above, and since the rotation adjustment by the rod is also added, the adjustment accuracy is significantly improved. The ability to correct the propulsion direction is significantly improved, and the working efficiency of the small diameter pipe burying machine is significantly improved.

[Brief explanation of the drawing]

Fig. 1A is a partially sectional side view of an embodiment of the present invention, Fig. 1B is a sectional view of the - portion of Fig. 1A, Fig. 2 is an explanatory diagram of a modified state, and Fig. 3 FIG. 2 is a side view showing a conventional example. b... Hydraulic cylinder for drive, c... Rod, 1
... Fixed pipe, 2 ... Hydraulic cylinder for adjustment, 3 ...
Rocking body, 3a... protruding tip, 4... spherical bushing, 6... oblique oblong hole, 7 pin, 8... stopper.

Claims (1)

[Scope of utility model registration request] In a leading device of a small-diameter pipe burying machine, which is fixedly installed at the tip of a connecting rod that is moved forward and backward by a driving hydraulic cylinder, an intermediate part of the oscillating body at the tip of the fixed tube connected to the tip of the rod is used. The proximal end of the oscillator is rotatably connected to the piston rod end of the adjusting hydraulic cylinder fixedly installed in the fixed pipe, and the base end of the oscillator is loosely fitted into the oblique oblong hole. A small diameter pipe, characterized in that the pipes are connected by a pin and constituted as an inclination adjustment mechanism of the oscillating body by one-way inclination adjustment of the protruding tip of the oscillating body by the adjusting hydraulic cylinder and rotational adjustment of the rod. Leading device for burial machine.