JPH0629272Y2 - Buried pipe automatic propulsion device - Google Patents

Description

[Detailed description of the device] (Industrial application field) When burying water and sewer pipes and telephone line protection pipes in the ground,
Especially in urban areas, there is a problem such as traffic blockage. Therefore, there is a construction method in which the target buried pipe is propelled by a propulsion device inside the starting shaft without digging and laying down to the reaching shaft.

The present invention relates to a propulsion device in a vertical shaft, and particularly to a buried pipe capable of automatically propelling the buried pipe from the start end to the end, although the stroke of the cylinder of the propulsion device is remarkably shortened. The present invention relates to an automatic propulsion device.

(Prior Art) Conventionally, in order to lay a buried pipe underground without excavating, as shown in FIG. 12, a starting shaft a and a reaching shaft b are cut and a stand c is installed in the starting shaft a. , The excavator f is propelled by the propulsion jack d provided on the gantry c, and the propulsion jack d is extended by the length of the buried pipe h, and then the propulsion jack d is contracted to move the buried pipe h into the space. After inserting, the propulsion jack d was propelled again to lay the buried pipe.

In the prior art, when the stroke of the propulsion jack d is set to the length of the buried pipe h, there is a problem of buckling and cost increase. Usually, the propulsion jack d is expanded and then contracted so that the spacer corresponding to the stroke is generated. It was re-extended through and the excavator was propelled by the length of the buried pipe.

(Problems to be solved by the invention) In the above-mentioned conventional technology, when the stroke of the propulsion jack d is lengthened, the starting shaft also becomes larger by that amount, which requires man-hours for digging the shaft and the construction cost is low. There was a drawback that it was up.

Therefore, if the stroke of the propulsion jack d is shortened,
There is a problem that the man-hour for mounting the spacer is required for each stroke of the propulsion jack d, and the man-hour for digging the vertical shaft and the cost reduction effect of the propulsion jack d are offset.

(Means for Solving the Problem) The present invention has been made to solve the problems in the above-mentioned conventional technique. A guide 2 is fixedly mounted on a pedestal 1 and a chuck is detachably attached to the guide 2. In an embedded pipe propulsion device in which a device 3 is provided, a telescopic cylinder 4 is fixed to the chuck device 3, and a push plate 6 is fixed to a piston rod 5 installed in the telescopic cylinder 4, the extension end of the piston rod 5 End sensor C and contraction end sensor D for detecting the contraction end and contraction end, respectively
And a structure in which the starting end sensor B or the ending end sensor A for detecting the starting end position and the ending end position of the guide 2 are provided. (1) The chuck device 3 is engaged with the guide 2 When the piston rod 5 is extended and the extension end sensor C operates, the extension of the piston rod 5 is stopped, and then the chuck device 3 releases the guide 2 to contract the piston rod 5 of the telescopic cylinder 4 and the contraction end sensor D. When the piston rod is actuated, the contraction of the piston rod is stopped, and thereafter, the same operation is repeated until the terminal sensor A is actuated, so that the embedded pipe is automatically pushed through the push plate 6, and the embedded pipe is characterized in that Automatic propulsion device.

(2) When the chuck device 3 is engaged with the guide 2 and the piston rod 5 of the telescopic cylinder 4 is contracted, and the contraction end sensor D is activated, the contraction of the piston rod 5 is stopped, and then the chuck device 3 disengages the guide 2. When the piston rod 5 of the telescopic cylinder 4 is released and the extension end sensor C is activated, the extension of the piston rod 5 is stopped, and the same operation is repeated until the start end sensor B is activated. The present invention relates to an automatic propulsion device for an embedded pipe, wherein the embedded pipe is pulled out through the.

(Operation) The operation of the configuration of the present invention will be described.

The chuck device 3 is operated, and the chuck device 3 is guided to the guide 2
When hydraulic oil is supplied to the extension side of the telescopic cylinder 4 in a state of being engaged with the piston rod 5, the piston rod 5 extends.

When the extension end sensor C detects the extension end of the piston rod 5, the hydraulic oil to the telescopic cylinder 4 is stopped, so that the extension of the piston rod 5 is stopped. Next, the chuck device 3
When the operation of is released, the chuck device 3 releases the guide 2, but in that state, when hydraulic oil is supplied to the contracting side of the telescopic cylinder 4, the piston rod 5 contracts.

When the contraction end sensor D detects the contraction end of the piston rod 5, the supply of hydraulic oil to the telescopic cylinder 4 is stopped, so that the contraction of the piston rod 5 is stopped.

Thereafter, the same operation is repeated, and the telescopic cylinder 4 moves forward until the end sensor A detects the end position, and the buried pipe is pushed into the ground through the push plate 6 fixed to the piston rod 5. be able to.

Also, when pulling out the buried pipe from the ground, the chuck device 3
When the chuck device 3 is engaged with the guide 2 and hydraulic oil is supplied to the contracting side of the telescopic cylinder 4,
The piston rod 5 contracts. When the contraction end sensor D detects the contraction end of the piston rod 5, the hydraulic oil to the telescopic cylinder 4 is stopped, so that the contraction of the piston rod 5 is stopped.

Next, when the operation of the chuck device 3 is released, the chuck device 3 releases the guide 2, but when hydraulic oil is supplied to the extension side of the telescopic cylinder 4 in that state, the piston rod 5
Grows.

When the extension end sensor C detects the extension end of the piston rod 5, the supply of hydraulic oil to the telescopic cylinder 4 is stopped, so that the extension of the piston rod 5 is stopped.

After that, the same operation is repeated, and the telescopic cylinder 4 retracts until the starting end sensor B detects the starting end position, and the buried pipe is pulled out from the ground through the push plate 6 fixed to the piston rod 5. be able to.

(Embodiment) Hereinafter, a case in which an embodiment of the present invention is applied to an automatic propulsion apparatus and a manual propulsion apparatus will be described in detail with reference to FIGS. 1 to 10.

FIG. 1 is a plan view showing a propulsion device main body in an embodiment of the present invention, and FIG. 2 is a front view of the same.

In the figure, reference numeral 1 denotes a gantry installed in the starting shaft, and a pair of left and right guides 2 are fixedly installed on the gantry 1.

The pair of guides 2 are installed inside the telescopic cylinder 4 and the hydraulic chuck 3 which is concentrically fixed to one end of the telescopic cylinder 4, as shown in FIG. It penetrates through the center of the telescopic piston 5 fixed to the push plate 6, and acts to clamp the guide 2 when oil is supplied to the pressure oil supply / discharge port 3a of the hydraulic chuck 3 and release the guide 2 when oil is discharged. To do.

Further, A in FIG. 1 is a terminal position sensor in the propulsion apparatus of the present embodiment. The terminal position sensor A has a light emitting portion mounted on the mount 1 and a light receiving portion mounted on the push plate 6, respectively. Has been.

4 to 6 are views showing the mounting relationship of other position sensors used in this embodiment. The light emitting portion of the starting position sensor B is attached to the chuck 3, and the light receiving portion is attached to the mount 1. There is.

Further, the light emitting portions of the retracted end position sensor D and the extended end position sensor C of the telescopic cylinder 4 are fixed to the telescopic cylinder 4, and each light receiving portion is attached to a bar fixed to the push plate 6.

FIG. 7 is a hydraulic circuit diagram for driving the propulsion device according to the embodiment of the present invention. As shown in Table 1, the hydraulic circuit selects either forward or backward for automatic and manual operation. You can do the work.

Next, the operation sequence of the embodiment of the present invention will be described in detail.

Although the present invention is an automatic propulsion device for a buried pipe, manual propulsion is possible if necessary, and the operation sequence at that time is as follows.

1. Manual advance (when pushing the buried pipe) When the B1 and B4 buttons are pressed and then the B5 button is pressed, the chuck 3 tightens the guide 2 and the telescopic cylinder 4 extends.

When the B6 button is pressed at the extended end position, the chuck 3 is released and the telescopic cylinder 4 contracts.

2. Manual retraction (when pulling out the buried pipe) When the B2 and B4 buttons are pressed and then the B6 button is pressed, the chuck 3 tightens the guide 2 and the telescopic cylinder 4 contracts.

When the telescopic cylinder 4 is at the contracted end position, pressing the B5 button releases the chuck 3 and the telescopic cylinder 4 extends.

(Effect of Device) As described above, the buried pipe propulsion device of the present invention has the following effects.

The man-hours for mounting the spacer for each stroke of the propulsion jack can be omitted, and the man-hours can be significantly reduced.

The shaft length requires the sum of the unit length of the buried pipe and the contracted end length of the propulsion device. However, since the propulsion device of the present invention has an extremely short stroke, the construction cost of the shaft can be significantly reduced, and The space that obstructs transportation can be reduced.

Since the stroke of the cylinder can be made extremely short, it is not necessary to consider the buckling of the cylinder, and it is possible to increase the output and to significantly reduce the price.

[Brief description of drawings]

FIG. 1 is a plan view of a buried pipe propulsion device used in an embodiment of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a III-III of FIG.
Sectional views, FIGS. 4 to 6 are views showing a mounting state of a position sensor, FIG. 7 is a hydraulic circuit diagram for driving a propulsion device used in an embodiment of the present invention, and FIG. 8 is an embodiment of the present invention. The wiring diagram of the chuck and the telescopic cylinder driving solenoid in FIG. 11, the wiring diagrams for FIGS. 9 to 10, and FIG. 11 are diagrams showing the prior art. DESCRIPTION OF SYMBOLS 1 ... Stand, 2 ... Guide 3 ... Chuck, 4 ... Telescopic cylinder 5 ... Piston rod, 6 ... Push plate A ... End sensor, B ... Start end sensor C ... Extension end sensor, D ... Contraction end sensor

Claims (2)

[Scope of utility model registration request] 1. A piston mounted on a pedestal 1 in which a guide 2 is fixed, a chuck device 3 is removably attached to the guide 2, and a telescopic cylinder 4 is fixed to the chuck device 3. In the buried pipe propulsion device in which the push plate 6 is fixed to the rod 5, the extension end and the contraction end of the piston rod 5 are
An extension end sensor C and a contraction end sensor D for detecting each, and an end sensor A for detecting the end position of the guide 2 are provided.
The chuck device 3 is engaged with the guide 2, the piston rod 5 of the telescopic cylinder 4 is extended, and when the extension end sensor C operates, the extension of the piston rod 5 is stopped, and then the chuck device 3 releases the guide 2 to extend and contract. When the piston rod 5 of the cylinder 4 is contracted and the contraction end sensor D operates, the contraction of the piston rod is stopped, and thereafter, the same operation is repeated until the end sensor A operates, and the contraction sensor 6 automatically operates through the push plate 6. An automatic propulsion device for a buried pipe, characterized in that the buried pipe is pushed in. 2. A piston which is fixedly mounted on a pedestal 1 and which is provided with a chuck device 3 which can be engaged with and disengaged from the guide 2, and which has a telescopic cylinder 4 fixed to the chuck device 3 and which is installed in the telescopic cylinder 4. In the buried pipe propulsion device in which the push plate 6 is fixed to the rod 5, the extension end and the contraction end of the piston rod 5 are
An extension end sensor C and a contraction end sensor D for detecting each, and a start end sensor B for detecting the start end position of the guide 2 are provided.
When the chuck device 3 is engaged with the guide 2 and the piston rod 5 of the telescopic cylinder 4 is contracted, and the contraction end sensor D operates, the contraction of the piston rod is stopped, and then the chuck device 3 releases the guide 2 to expand and contract. When the piston rod 5 of the cylinder 4 is extended and the extension end sensor C operates, the extension of the piston rod 5 is stopped, and thereafter, the same operation is repeated until the start end sensor B operates, and the piston rod 5 is embedded via the push plate 6. An automatic propulsion device for buried pipes, characterized in that the pipe is pulled out.