JP3805479B2 - Small diameter pipe burying equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe embedding apparatus, and more particularly to a pipe embedding apparatus used for embedding a small diameter pipe.
[0002]
[Prior art]
As a means to embed relatively small-diameter pipes such as water and sewer pipes and electric pipes in the ground in the horizontal direction, a pipe burying device that pushes pipes into shafts that have been excavated from the ground surface and is buried in the ground. After installation, the rear end of the pipe is pressed by this device and buried, and then the next pipe is successively pushed and buried while the next pipe is added.
[0003]
[Problems to be solved by the invention]
In recent years, however, there has been an increase in construction in confined areas such as the vicinity of residential areas, and there has been a significant limitation in the space for excavating shafts for installing work sites, especially pipe burying devices. Drilling has become difficult.
[0004]
For this reason, it is difficult to install a conventionally used pipe burying device in a small-diameter shaft excavated under the above-described conditions. Therefore, in such a case, a small-diameter pilot that can be pushed in with a small driving force. A so-called two-step type pipe embedment device that pushes and replaces the pipe after propelling the pipe and then embeds the pipe is widely adopted because the device itself is relatively small, According to this, there is a problem that the work procedure becomes complicated and the construction period is extended.
[0005]
[Means for Solving the Problems]
The present invention has been made in order to solve the above-described problems of the prior art, and even in a narrow work site where only a small-diameter shaft can be excavated, a pipe burying device is installed in the pipe. It is to be able to bury.
[0006]
As a means for solving the above-mentioned problems, the present invention provides a propulsion body for a guide frame installed in a shaft in a small-diameter pipe embedding apparatus that embeds in the ground by pressing the rear end of the pipe to be buried in the ground. A drive unit that supports the excavator main body so as to be movable in the front-rear direction and is provided to move up and down between a normal position where the driving force can be transmitted when the pipe is embedded and an upper retreat position when the pipe is added. That is.
[0007]
As a result, when the pipe is set, the drive unit is placed in a position where it is retracted upward, so that the extension pipe can be performed without being obstructed by the drive unit, and the pipe can be set even in a narrow shaft. Therefore, it is possible to use a conventional apparatus.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings.
[0009]
As shown in FIGS. 1 (A) to 1 (C), the guide frame 2 installed in the shaft 1 excavated from the ground surface has left and right guide frame parts 3 and 3 arranged horizontally in the pipe embedding direction. And standing wall portions 4 and 4 rising at the rear end portion on the opposite side to the tube embedding direction, and the lower surfaces of both ends of the propulsion main body 5 are straddled and mounted on the guide rail portions 3 and 3 in the tube embedding direction. It is supposed to be movable.
[0010]
The propulsion main body 5 has upright portions 6 and 6 on the left and right of the upper portion, and a fitting recess 8 into which the rear end of the pipe 7 to be embedded can be fitted. Guide grooves 10 and 10 are formed in which lower side portions of the drive unit 9 described later are slidably fitted.
[0011]
The cylinder portions 12 and 12 of the propulsion cylinders 11 and 11 are inserted into and fixed to the left and right upright portions 6 and 6 of the propulsion body 5, and the piston rods 13 and 13 of the propulsion cylinders 11 and 11 are fixed to the guide frame. 2 is fixed to the upright wall portions 4 and 4, and the cylinder portion 12 is moved to the piston rod 13 along with the propulsion body 5 in the left direction by supplying pressure oil to the left side of the cylinder portion 12 in FIG. The cylinder portion 12 is returned together with the propulsion body 5 by supplying pressure oil to the right side.
[0012]
The propulsion cylinders 11 and 11 employ a propulsion device such as that disclosed in Japanese Utility Model Publication No. 4-17670. The details of the propulsion device are described in the above-mentioned gazette, so illustration is omitted. The apparatus is provided with engaging portions at the front portion and the rear portion of the cylinder portion 12 of the propulsion cylinder 11 and an engaging portion corresponding to the engaging portion on the propulsion main body 5 side. By locking, the cylinder portion 12 is fixed to the propulsion main body 5 at a position where it slides back and forth, and the propulsion main body 5 is propelled in two steps.
[0013]
In the upper rear part of the guide frame 2, a drive unit 9 for applying excavation rotational force to the auger screw 14 inserted through the pipe 7 can take a normal position during excavation and a retreat position upward from it. It can be moved up and down.
[0014]
That is, the lower ends of the piston rods 16 and 16 of the left and right drive unit elevating cylinders 15 and 15 of both rod types are fixedly erected on the upper ends of the left and right standing wall portions 4 and 4 at the rear portion of the guide frame 2. The upper ends of the 15 piston rods 16 are connected by a connecting member 17.
[0015]
As shown in FIG. 3, the drive unit 9 has a motor 19 attached to the upper part of a vertically thin box-like case 18, and a pipe 7 including an auger screw 14 at the lower part of the case 18. A cylindrical body 20 having an opening on the front side so that the rear end can be fitted is rotatably provided via bearings 21 and 21, and is connected to the rear end of the auger screw 14 at the center of the rear portion of the cylindrical body 20. An output shaft 22 that gives rotation to the cylindrical body 20 is provided so that the inner periphery of the annular portion 24 at the end thereof is rotated together with the cylindrical body 20 by the swivel bearing 24 via the arm 23.
[0016]
A gear 25 is formed on the outer periphery of the annular portion 24 of the arm 23, and the gear 25 and the gear 27 on the output shaft 26 of the motor 19 rotate through a group of intermediate gears 28, 29, and 30. It is to be transmitted.
[0017]
Suspension portions 31, 31 protrude in the horizontal direction on both sides in the axial direction of the drive unit 9, and flanges 32, 32 provided at the lower end position of the elevating cylinder 15 include the suspension portions 31, 31. 1 is engaged from the lower surface side of the lift 31 and is lifted as shown in FIGS.
[0018]
In the figure, 7 'indicates a tube already buried in the ground, and 14' indicates an auger screw inserted into the tube.
[0019]
Next, the operation of the above embodiment will be described with reference to FIGS.
[0020]
4 (A) and 4 (B), the preceding pipe 7 'is already buried in the ground, the propulsion cylinders 11 and 11 are shortened, the propulsion body 5 is moved backward, and the drive unit elevating cylinders 15 and 15 are moved. And the flanges 32, 32 push up the suspending portions 31, 31 of the drive unit 9 to retract upward.
[0021]
In this state, the new pipe 7 is suspended in the shaft 1 together with the auger screw 14 in a slanting posture in the horizontal plane as shown in FIGS. 1 and 4A, and suspended to the position beyond the lower end of the drive unit 9. When connecting, add cables, hydraulic hoses, etc. When the addition work is completed, the pipe 7 is swung in the horizontal plane in the direction shown by the arrow in FIG. 5A, and then lowered as shown in FIG. 6B.
[0022]
When the axis of the pipe 7 coincides with the existing pipe 7 ', the pipe 7 is moved in the direction of the arrow in FIG. 7B, and the next auger screw 14 is added to the auger screw 14' on the existing pipe 7 'side and the pipe 7 'And 7 are joined.
[0023]
When the pipe extension is completed in this way, as shown in FIG. 8B, the drive unit elevating cylinders 15 and 15 are moved downward to lower the drive unit 9 and the lower ends thereof are fitted into the guide grooves 10 and 10 of the propulsion body 5. Combine.
[0024]
Next, the propulsion cylinders 11 and 11 are extended in the direction of the arrow in FIG. 9B to connect the output shaft 22 of the drive unit 9 and the auger screw 14, and the states of FIG. 2, FIG. 10A and FIG. The drilling preparation is completed.
[0025]
Therefore, when the pipe 7 is set, the drive unit 9 can be hung to a predetermined connection position in a state of being retracted upward, and the drive unit 9 is moved to a predetermined position after completion of the addition to the existing pipe 7 '. The output shaft 22 may be connected to the auger screw 14 in the pipe 7 and the inner dimension in the shaft 1 may be reduced by the amount of the drive unit 9. In addition, if this invention is applied to the above-mentioned two-step type pipe embedding apparatus, the advantage of the apparatus can be exhibited further.
[0026]
【The invention's effect】
As described above, according to the present invention, the propulsion main body is supported on the guide frame installed in the shaft so as to be movable in the front-rear direction, and the driving portion that applies the driving force for excavation to the propulsion main body is driven when the pipe is embedded. Even in a one-step type pipe burying device where the drive part is relatively large, it is installed in a small-diameter shaft through a normal position where it can transmit and an upward retracted position when the pipe is added. Since the drive unit can be lifted and retracted even when the pipe is added, the extension work can be performed without any trouble.
[Brief description of the drawings]
FIGS. 1A to 1C show a state in which a pipe is suspended according to an embodiment of the present invention, FIG. 1A is a plan view, FIG. 1B is a side view, and FIG.
2 (A) to (C) show the state when the transfer is completed, (A) is a plan view, (B) is a side view, and (C) is a front view. FIG.
3 is an enlarged cross-sectional view of a drive unit in FIGS. 1 and 2. FIG.
4A and 4B are a plan view and a side view showing a state when the pipe is suspended. FIG.
FIGS. 5A and 5B are a plan view and a side view showing a state in which a pipe is suspended. FIG.
FIGS. 6A and 6B are a plan view and a side view of a state in which the axis of the tube is aligned with the existing tube.
FIGS. 7A and 7B are a plan view and a side view of a state in which a tube is set in an extended position.
FIGS. 8A and 8B are a plan view and a side view of a state where a tube is added. FIG.
FIGS. 9A and 9B are a plan view and a side view showing a state where the drive unit is lowered and connected to the propulsion body. FIGS.
FIGS. 10A and 10B are a plan view and a side view in which the tube can be pushed forward.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vertical shaft 2 Guide frame 3 Guide rail part 4 Standing wall part 5 Propulsion main body 6 Standing upper part 7,7 'Pipe 8 Recessed part 9 Drive part 10 Guide groove 11 Propulsion cylinder 14 Auger screw 15 Drive part raising / lowering cylinder 17 Connecting member 19 Motor 20 Cylinder Body 23 Arm 24 Ring part 25, 27, 28, 29, 30 Gear 31 Suspension part 32 Flange

Claims (1)

In an embedding device for a small-diameter pipe that is buried in the ground by pressing the rear end of the pipe to be buried in the ground, the propulsion body is supported by the guide frame installed in the shaft so as to be movable in the front-rear direction. A small-diameter pipe burying device characterized in that a drive unit for providing a driving force for excavation is provided so as to be movable up and down over a normal position where the driving force can be transmitted when the pipe is buried and an upper retreat position when the pipe is added .

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