JPH028497A - Direction controller for pipe-burying device - Google Patents

Abstract

PURPOSE:To simplify control circuit, reduce the number of parts, and raise the efficiency of operation by a method in which a conical part on the back side of an hydraulic cylinder is covered with a hollow conical part set in the face of the conical part and inclined to straight, vertical, and bilateral directions. CONSTITUTION:A conical part 20 having one wide groove and four narrow grooves is set on the back side of a hydraulic cylinder 3 for excavation. A hollow conical part 21 having large and small projections inside is provided on the tip of an oil-pressure cylinder 22. An index-type hydraulic motor 23 is operated in such a way as to advance the part 21 straightly to cover the part 20. The part 21 is rotationally driven to incline the part 20 to five directions; straight, vertical, and bilateral directions, by combinations fitting and non-fitting of the grooves and the projections. The cylinder 3 is inclined to an optional direction for controlling the direction of a pipe-burying machine.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a burying machine for burying a pipe body underground without excavation, and particularly to a control device for controlling the direction thereof.

[Conventional technology]

The method of burying the pipe in the soil is to excavate the ground to a predetermined depth from the ground and bury it, or to install an appropriate bit without excavating from the ground, or in a place where the topography does not require the installation of a bit. In this case, a construction method is adopted in which the pipes are buried by digging or drilling holes in a predetermined direction from one side and pushing the pipes in order.

In addition, when burying small-diameter pipes such as electric wire conduits, water pipes, and gas pipes in the soil, the main body of the pipe burying machine is buried in the soil without using methods such as digging and discharging earth and sand. A method of burying the pipes one after another while pushing them forward is carried out, and the embedding machine used in this method is as shown in Fig. 1.

That is, in FIG. 1, P is a pit dug to a predetermined depth from the ground, and the push pipe device 1 is installed inside this pit P.

Reference numeral 2 denotes the main body of the pipe burying machine, and 3 a hydraulic cylinder for excavation provided at its tip.This cylinder 3 extends in the direction of the arrow and presses into the soil.

The reaction force due to this press-fitting operation causes the movable body 6 of the push pipe device 1 to move in the direction of the arrow, and the pipe body burying machine main body 2 and the following pipe body 4
The soil will be injected into the soil one after another without any discharge.

In addition, on the ground, a hydraulic pressure #5 consisting of a hydraulic pump, an oil tank, etc., and its operation panel 7 are installed.
5 is connected by a signal cable 8, and the hydraulic power source 5, the moving body 6, and the hydraulic cylinder 3 are connected by a hydraulic hose 9.

A direction control device is built into the pipe body burying machine main body 2, and the hydraulic cylinder 3 can be tilted in five directions: up, down, left, right, and straight. The main body 2 of the tube embedding machine can be tilted in any direction.

FIG. 7 shows a conventional direction control device, in which a square pyramid 1 is integrally connected to the rear of an excavation hydraulic cylinder 3.
4 wooden tilting hydraulic cylinders 1 at positions corresponding to the 4 sides of 0
1 is placed, and the tree body 12 is attached to the tip of the piston rod of this hydraulic cylinder, and the tree body 12 and the square pyramid 10 are slid on the required surfaces by the forward and backward movement of the prescribed tree body 12 by the prescribed hydraulic cylinder 11. The direction of the tube burying machine body 2 is controlled by tilting the square pyramid 10 up and down, left and right, or in a straight direction, and tilting the excavation hydraulic cylinder 3 itself about the spherical seat 13 as the center of rotation.

In the conventional device described above, since the excavation hydraulic cylinder 3 and the four tilting hydraulic cylinders 11 are double-acting cylinders, each hydraulic cylinder requires two hydraulic hoses, and therefore 10 hydraulic hoses are required. becomes.

In addition, as shown in Fig. 7, five solenoid valves 14 for controlling each hydraulic cylinder 11 are built into the pipe body burying machine main body 2, and the flow of oil can be switched by each solenoid valve. This makes it possible to reduce the number of hydraulic hoses 9 used from the machine body 2 to the ground hydraulic power source 5 to two.

[Problem to be solved by the invention]

Conventional pipe burying machines of this type require the use of four hydraulic cylinders for the direction control mechanism, and the number of hydraulic cylinders installed is the same in order to reduce the number of hydraulic hoses used. The problem was that it had to have a built-in number of solenoid valves.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a pipe burying machine having a tiltable hydraulic cylinder for excavation at the tip thereof, in which a body is attached to the rear of the hydraulic cylinder for excavation. The hydraulic cylinder for excavation is configured to tilt by providing a conical body, a hollow conical body at a corresponding position, and covering the conical body with the hollow conical body in the direction of translation.

[Effect]

The present invention has the above-mentioned configuration, and when the hydraulic cylinder for excavation at the tip of the main body of the pipe burying machine causes a deviation in the traveling direction of the main body of the pipe burying machine during excavation, the hydraulic cylinder for excavation is installed after the hydraulic cylinder for excavation. By inserting the hollow cone into the cone provided on the inside of the hollow cone, the cone can be easily tilted by the action of the protrusion provided on the inside of the hollow cone.

As mentioned above, when the cone tilts, the hydraulic cylinder for excavation tilts around the spherical seat as the center of rotation, so by continuing to excavate with the tilting direction as the direction to correct the deviation, the buried direction of the pipe can be changed. Corrected in the right direction.

〔Example〕

In the embodiment shown in FIGS. 2 to 6, the main body 2 of the pipe burying machine, the hydraulic cylinder 3 for excavation, the spherical seat 13 that supports the cylinder 3 in a tiltable manner at the front part of the main body 2, etc. are shown in FIG. This is the same as the conventional example.

20 in FIG. 2 is a conical body integrally provided at the rear of the excavation hydraulic cylinder 3, and a hollow conical body 21 is located at a corresponding position.
is provided at the tip of the piston rod of the hydraulic cylinder 22.

An index type hydraulic motor 23 is integrally provided at the rear of the hydraulic cylinder 22, and the shaft of this index type hydraulic motor is directly connected to the piston rod of the hydraulic cylinder 22, so that the piston rod of the hydraulic cylinder can be rotated. There is.

FIG. 3 is a diagram showing the grooves provided on the conical surface of the conical body 20, and only the groove 20-a is the same as the other grooves (20-b, 2).
0-c, 20-e, 2O-f).

However, the grooves 20-b, 2O-C120-e, and 20-f all have the same groove width dimension. In addition, groove 20-a
No groove is provided on the conical surface 20-d on the opposite side.

FIG. 4 is a diagram showing a protrusion provided inside the hollow cone 21, and there is also a protrusion 21 on the opposite side of the protrusion 20-a.
-b, and the protrusion 21-a is larger in height and width than the protrusion 21-b.

The groove (20-a) of the cone 20 shown in the third and FIG.
, 20-b, 20-c, 20-e.

2 (1-f) and the protrusions (21-a, 2l) of the hollow cone 21
-b), the protrusion 21-a is the groove 20-
The dimensional relationship is such that it fits only in the groove a, and the dimensional relationship does not allow it to fit in the other four grooves (20-b, 2O-C120-e, 2O-f).

Next, an embodiment of the direction control method will be described.

The state shown in FIG. 2 shows the preparatory operation before direction control. First, when the piston rod of the hydraulic cylinder 22 is brought into the contracted state, the hollow cone 21 provided at the tip of the piston rod retreats. , and the conical body 20 integrally provided at the rear of the hydraulic cylinder 3 for excavation.

When the index type hydraulic motor 23 is rotated by a predetermined angle from this state, the piston rod of the hydraulic cylinder 22 also rotates, so that the hollow cone 21 is rotated by a predetermined angle.

The embodiment shown in FIG. 5 shows a straight-line control state in the direction control method, in which the piston rod of the hydraulic cylinder 22 is extended and the hollow cone 2 provided at the tip of the piston rod is extended.
1 over the cone 20.

In this state, the large protrusion 21-a of the hollow cone 21 shown in FIGS. 3 and 4 fits into the large groove 20-a of the cone 20, while the small protrusion 21 of the hollow cone 21 -b pressed against the conical surface 20-d of the conical body 20, and the conical body 20 maintained a straight forward posture. Therefore, the excavation hydraulic cylinder 3 integrated with the conical body 20 can maintain a straight forward posture with the spherical seat 13 as the center of rotation,
Straight-line control becomes possible.

The embodiment shown in FIG. 6 shows a tilt control state among the direction control methods. First, the index type hydraulic motor 23 is rotated by a predetermined angle in the preparatory operation shown in FIG. 2, and then, as shown in FIG. The provided hollow cone body 21 is placed over the cone body 20.

In this state, the large protrusion 21-a of the hollow cone 21 shown in FIGS. 3 and 4 cannot fit into the small groove 20-C of the cone 20, and pushes the groove entrance. It's pressing.

The small protrusion 21-r of the other hollow cone 21 was fitted into the small groove 20-r of the cone 20, so that the cone 20 maintained an upwardly inclined position. Therefore, since the hydraulic cylinder for excavation integrated with the cone can maintain an upwardly inclined posture with the spherical seat 13 as the center of rotation, inclination control becomes possible.

In addition to directional control methods, straight-ahead and upward tilt control have been described above. Further, the downward, leftward, and rightward control methods can be implemented in the same manner as the methods already described, but the relative positional relationship between the groove of the cone body 20 and the protrusion of the hollow cone body 21 in each tilt control method is is as shown in Table 1 below.

Table 1 [Effects] As explained above, the present invention provides a pipe burying machine having a tiltable excavation hydraulic cylinder at the tip thereof, and a conical body is provided at the rear of the excavation hydraulic cylinder. A hydraulic cylinder for excavation can be activated by installing a hollow cone at a certain position, rotating it by a predetermined angle, then placing it over the cone and tilting the cone in five directions: straight ahead, up and down, and left and right. Since it has a tilting structure, the excavation hydraulic cylinder can be tilted in any direction by rotating and linearly moving one hollow cone, unlike the conventional technology, which has a large number of directional control hydraulic cylinders. This has the effect of eliminating the need for a solenoid valve.

In addition, since it is only necessary to control the rotation angle of one hollow cone, the control circuit is simple, and the number of parts is reduced compared to conventional devices, improving the reliability of the mechanism. This has the effect of improving operability.

[Brief explanation of the drawing]

FIG. 1 is a partially vertical side view showing the state of implementation of the pipe construction method using the device of the present invention; FIG. 2 is a vertical side view of the device of the present invention; FIGS. The figure shows an enlarged arrow view showing the detailed shape of the main part of the device of the present invention; FIG. 5 is a longitudinal sectional side view of the device of the present invention, showing the straight-line control state; The figure is a vertical side view of the device of the present invention, showing the tilt control state; FIG. 7 is a vertical side view of an example of the conventional device. 1...Pushing pipe device, 2...Pipe body embedding machine main body, 3...
Hydraulic cylinder for excavation, P... pit, 4... pipe body,
5... Hydraulic source, 6... Moving body 7... Operation panel, 8...
...Signal cable, 9...Hydraulic hose, 10...Square pyramid, 11...Hydraulic cylinder, 12...Tree body, 1
3... Spherical seat, 14... Solenoid valve, 20... Conical body 2
1...Hollow cone body, 22...Hydraulic cylinder, 23.
... Index type hydraulic motor, 20-a, 20-b,
20-c, 2O-e220-f... Groove provided on the conical surface of the cone 20,

Claims (3)

[Claims] (1) In a pipe burying machine having a tiltable excavation hydraulic cylinder at the tip, a cone is provided at the rear of the excavation hydraulic cylinder, and a hollow cone is provided at a corresponding position;
A directional control device for a pipe burying machine configured to tilt a hydraulic cylinder for excavation by covering the cone with a hollow cone in a linear motion direction and tilting the cone in vertical, horizontal, and straight directions. . (2) One or more protrusions are provided on the inside of the hollow cone, and correspondingly, one or more grooves are provided on the conical surface of the cone, and the hollow cone is connected to a hydraulic motor or the like. By rotating the hollow cone by a predetermined angle by a driving means, the position of the projection provided on the inside of the hollow cone matches the position of the groove provided on the conical surface of the cone, and then the driving means such as a hydraulic cylinder is used to rotate the hollow cone by a predetermined angle. 2. The direction control device for a tube burying machine according to claim 1, wherein the hollow cone is placed over the cone in a linear motion direction, and the cone is tilted in a predetermined direction. (3) The mechanism for tilting the conical body in a predetermined direction is fitted with two types of projections of different sizes and correspondingly two types of grooves of different sizes. , a claim characterized in that the process is performed by non-fitting (pressing) (
1) A direction control device in a pipe embedding machine described in (2).