JP3372819B2 - Underground guide of propulsion device - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to, for example, a gas pipe,
The present invention relates to a soil guide for a non-cutting type propulsion device that propels a propelling body having a small diameter hole into the soil to lay a pipe such as a water pipe in the soil.

[0002]

2. Description of the Related Art In this type of propulsion device, a clamp main body of a clamp mechanism is attached to left and right hydraulic cylinders fixed to a device frame, and a fixed holding member provided in the clamp main body and a movable holding member that moves in opposition thereto. It is configured such that the propelling body is sandwiched by and the clamp body is moved forward by the left and right hydraulic cylinders to push the propelling body into the soil.

In such a propulsion device, in order to guide the propelling body pushing into the soil, a submerged guide having a diameter slightly larger than that of the propelling body is thrust into the propulsion port (actual exploitation Sho 61- 15
2094, JP-A-8-42286, etc.).

[0004]

The soil guide of the above-mentioned prior art propulsion apparatus is formed of one cylindrical member,
When the buried pipe is connected and pulled back after the propellant has drilled a hole, removing the metal fittings in the connecting part leaves the metal extraction tools in the soil guide, making it difficult to take them out, especially installing a diameter expansion head. When pulling back by pushing back, the debris may be caught between the propelling body and the soil guide, which makes it difficult to pull back the propelling body.

In this case, it is sufficient to remove the soil guide after burying the buried pipe, but it is difficult to remove the soil guide. A first object of the present invention is to provide a propulsion device in which a tubular soil guide is detachably divided into two parts by a split surface that passes through a substantially axial center so that the split guides can be separated and extracted one by one. It is to provide an underground guide.

A second object of the present invention is to engage and disengage one split guide and the other split guide so as to be engageable and disengageable by axial movement, thereby restricting radial division. The purpose of the present invention is to provide a soil guide for a propulsion device that can be easily separated and united by forming a joint. A third object of the present invention is to provide a clamping mechanism that clamps and pushes a propelling body by forming a locking projection on the outer periphery of the rear ends of both split guides so as to engage with and disengage from the clamping mechanism. The purpose is to provide a soil guide for a propulsion device that can be pulled out by.

[0007]

The first concrete means for solving the problem in the present invention is to rush into the soil to propel body 3
That is, the tubular soil guide 21 for guiding the insertion of is divided into two parts detachably along the split surface L passing through the substantially axial center. This allows the two split guides 21U and 21D to be separated one by one and easily and easily extracted from the soil.

In addition to the first specific means, the second specific means for solving the problem in the present invention is such that the engaging portion 12 is formed in one split guide 21U and the other split guide 2 is formed.
1D is formed with an engaged portion 13 that engages with the engaging portion 12 in a disengageable manner with respect to one of the split guides 21U by moving in the axial direction and restricts radial division.

As a result, the split guides can be easily separated and combined by simply moving one of the split guides in the axial direction. The third concrete means for solving the problems in the present invention is the first
Alternatively, in addition to the specific means of 2, a clamp mechanism 6 for holding the propulsion body 3 in the device frame 4, a pushing mechanism 6 for pushing the clamp mechanism 6, and a soil guide are slidable in the axial direction. Auxiliary clamp mechanism 7 that is supported on the vehicle and fixed at the forward protruding position
Is provided, and a pullout locking projection 14 that engages with the hooking tool 42 provided on the clamp mechanism 6 in a disengageable manner is formed on the outer periphery of the rear ends of the split guides 21U and 21D.

As a result, the soil guide 21 can be easily pulled out by the clamp mechanism 6 which holds and pushes the propulsion body 3.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 3 to 6 and 8, the propulsion device 1 is shown as an example of a type in which the propulsion device 1 is arranged in the starting pit 2 formed in an open surface state and the propelling body 3 is pushed in from one wall of the pit 2. There is.

The propulsion device 1 is roughly classified into a device frame 4, a pair of left and right hydraulic cylinders (pushing mechanisms) 5 fixed to the device frame 4, and a clamp mechanism mounted on a cylinder tube 5A of both hydraulic cylinders 5. 6, a soil guide fixing auxiliary clamp mechanism 7 mounted on the device frame 4 on the front side of the clamp mechanism 6, a receiving mechanism 8 for receiving the rear portion of the propulsion body 3 on the rear side of the clamp mechanism 6, and the device frame. 4 is provided in the pit 2.

The device frame 4 is formed by welding a mold steel, an iron plate and the like on a pedestal having a rectangular shape in plan view, and a pair of front and rear brackets 15F and 15R are erected on the left and right side portions of the upper surface thereof. The piston rod 5B of the hydraulic cylinder 5 is fixedly supported on the brackets 15F and 15R. The cylinder tube 5A of each of the left and right hydraulic cylinders 5 can supply pressure oil from an external hydraulic pressure generator (not shown) via the hose and the control valve 16, and the supply of pressure oil causes the piston rod 5 to move.
It is movable in the axial direction (front-back direction) with respect to B.

A clamp body 17 of the clamp mechanism 6 is installed over the left and right cylinder tubes 5A,
In the clamp body 17, one fixed holding member 33 on the lower side and one movable holding member 35 on the upper side are arranged.
Is clamped and fixed to the clamp body 17. The clamp body 17 of the clamp mechanism 6 has two upper and lower
Both ends of the lower body 17A are fixed to the left and right cylinder tubes 5A, and the upper body 17B is divided into two parts.
A fixed holding member 33 is attached to the lower main body 17A, and a movable holding member 35 is provided to the upper main body 17B via an elevating means 34.

The central portion of the upper body 17B has a cylindrical shape to form a cylinder tube, and a piston 39 is formed inside the cylinder tube.
The piston rod 40 is slidably arranged to form a hydraulic cylinder, and the hydraulic cylinder serves as the elevating means 34. The movable holding member 35 is fitted to the lower end of the piston rod 40 of the elevating means 34, and is prevented from coming off by a set screw.

The fixed holding member 33 and the movable holding member 3
A large number of irregularities are formed on each clamping surface in the axial direction of the propulsion body 3, and the movable clamping member 35 presses the propulsion body 3 placed on the clamping surface of the fixed clamping member 33, so that the irregularity slip prevention action is added. The propelling body 3 is securely fixed to the clamp body 17. The auxiliary clamp mechanism 7 includes a fixed receiver 20 installed between the left and right front brackets 15F and a pin 22a with respect to the fixed receiver 20.
A pressing member 22 that is pivotally supported by an opening / closing mechanism to sandwich and fix the soil guide 21 together with the fixed receiver 20, a lock member 29 that connects and fixes the free end of the pressing member 22 to the fixed receiver 20, and a pressing member. The holding means 23 has a push pin 18 which is further provided on the holding member 22 and further presses the soil guide 21 held by the holding member 22.

The lock member 29 is pivotally supported on the bracket 20a of the fixed receiver 20, and when it is rotated, the lock member 29 is disengageably engaged with the forked free end portion of the pressing member 22 to rotate the handle 32. You can then tighten. The push pin 18 of the pressing means 23 is formed by a piston rod of a small hydraulic cylinder 19 and has a small diameter portion at its tip, and the small diameter portion is formed in the soil guide 21 in a hole 21a.
The large diameter portion presses the soil guide 21.

The pressing means 23 may be configured such that the pressing pin 18 is screwed into the pressing member 22 instead of the hydraulic cylinder 19 so as to be manually rotated.
As with No. 9, it is difficult to give a large tightening force manually. On the other hand, if the small hydraulic cylinder 19 is operated at the same time as the hydraulic cylinder 5 is operated, the soil guide 21 can be tightened with a large force when necessary.

The soil guide 21 guides the propelling body 3 when propelling the propelling body 3 by propelling the propelling body 3 into the soil by the clamp body 17 together with the propelling body 3 at the initial stage of the propelling body 3. After the plunge into the soil, the fixed receiver 20
It is sandwiched and fixed by the holding member 22 and the holding member 23, and the holding means 23 can more securely maintain the fixing to the device frame 4.

The propulsion body 3 has a propulsion pipe 25 detachably connected to the rear end of the propulsion head 24 at the front end.
An inclined pressure receiving surface 24a is formed at the front end, and a large number of propulsion pipes 25 having a fixed length are prepared. As the propulsion pipes 25 are propelled into the soil, they are connected in a concentric series and are replenished.
The connection between the propulsion head 24 and the propulsion pipe 25 and the connection between the propulsion pipes 25 are screw connections using a cap nut, but may be pin connections.

Further, one propulsion pipe 25 is bendable by connecting a plurality of pipe members with a pin 26 that is substantially orthogonal to the axis, or the propelling bodies 3 are pin that is substantially orthogonal to the axis. It can be bent by connecting with. The rear part or the following additional propelling pipe 25 of one propelling body 3 is received by the receiving mechanism 8. In this receiving mechanism 8, a receiving plate 27 is attached to the device frame 4 via an elastic support body 28. The receiving plate 27 has a gutter shape for mounting the propulsion pipe 25, and the front side is inclined forward and downward. . The elastic support body 28 has two front and rear rubber plates arranged in parallel, and elastically deforms the rubber plates to support the receiving plate 27 so as to be able to oscillate back and forth and to move up and down to some extent and sideways.

The installation mechanism 9 includes a front contact member 30F attached to the left and right front brackets 15F via a ball joint, and a rear contact member attached to the expansion and contraction means 31 pivotally supported on the left and right rear brackets 15R via a ball joint. The expansion and contraction means 31 is formed of a hydraulic cylinder, is bent at a lateral axis-shaped pivot point, and can be retracted upward.
With 0F in contact with the front wall of the pit 2, the expansion / contraction means 31
Is extended and the rear contact member 30R is pressed against the rear wall of the pit 2, so that the device frame 4 can be fixed in the pit 2.

Reference numerals 45 and 46 are left and right steps detachably provided on the apparatus frame 4, and the left and right hydraulic cylinders 5 and the control valve 16 are provided.
The reference numeral 47 is a suspending tool for suspending the propulsion device 1, and the reference numeral 50 is a level provided in the clamp body 17. The soil guide 21 will be described in more detail with reference to FIGS.

The soil guide 21 is composed of upper and lower split guides 21U and 21D, which are obtained by dividing the cylinder into two by a split surface L passing through a substantially axial center. The inner peripheral surfaces of the split guides 21U and 21D are uneven in the circumferential direction. It is shaped so that the contact area with the propelling body 3 is reduced, and the debris that has entered inside can be removed from the contact surface. The upper split guide 21U has a hole 21
a is formed and the pair of left and right engaging portions 1
2 are formed at two front and rear positions, and an engaged portion 13 corresponding to the engaging portion 12 is formed on the lower split guide 21D.

The engaging portion 12 and the engaged portion 13 of the upper and lower split guides 21U and 21D are formed in the vicinity of the split surface L, and the engaging portion 12 is formed by welding a bar material having a quadrangular cross section. The engaged portion 13 is formed by welding a member having a U-shaped cross section, and is moved from a position shifted in the axial direction shown by two-dot chain lines in FIGS. The engaging portion 12 is an engaged portion 1 having a U-shaped cross section.
It is structured such that it enters inside 3, and by engaging both of them, division in the radial direction is regulated.

On the contrary, in the combined soil guide 21, the engaging portion 12 is displaced from the engaged portion 13 by moving the upper split guide 21U relative to the lower split guide 21D in the axial direction, Can be separated into. Further, a locking protrusion 14 formed of an L-shaped member in plan view is provided on the outer periphery of the rear ends of the upper and lower split guides 21U and 21D. The locking projection 14 can be engaged with a hooking tool 42 provided on the front surface of the clamp body 17 of the clamp mechanism 6, and by hooking the hooking tool 42 and moving the clamp mechanism 6 backward, the split guides 21U, 21D. Can be extracted from the soil.

The hooking tool 42 is a hook-shaped member that is detachably or positionally adjusted on the front surface of the clamp body 17 of the clamp mechanism 6, and is in a state of engaging only with the upper split guide 21U and with the upper and lower split guides. 21U and 21D simultaneously engaged with the upper and lower split guides 21U and 21D
It is possible to adopt a state that is not involved in. The general operation of propelling the propelling body 3 of the propulsion device 1 will be described below.

First, the soil guide 21 in which the upper and lower split guides 21U and 21D are combined is arranged in the auxiliary clamp mechanism 7, the lock member 29 is loosened, and the pressing means 23 is released, and the propulsion head 24 is set to 1 The clamp main body 1 while receiving the one in which the book propulsion pipes 25 are connected by the receiving mechanism 8.
7 and the propulsion head 24 is arranged in the soil guide 21.

In that state, the lifting means 34 of the clamp mechanism 6
Is operated to lower the movable holding member 35 to hold the propelling body 3 together with the fixed holding member 33, and fix the propelling body 3 to the clamp body 17. Further, the lock member 29 of the auxiliary clamp mechanism 7 is loosely tightened to hold the soil guide 21 by the fixed receiver 20 and the pressing member 22. Next, the hydraulic cylinder 5 is operated to move the clamp body 17 forward so as to propel the propelling body 3 and the soil guide 21 is also pushed by the clamp body 17, and together with the propulsion head 24, the soil guide 21.
Is pushed into the soil, and then the pressing means 23 is operated to firmly lock the soil guide 21 to the device frame 4.

Thereafter, the clamping action of the clamp mechanism 6 is once released, the clamp body 17 is moved backward while the propelling body 3 and the soil guide 21 are left, and the rear part of the propelling body 3 is again clamped to perform the propulsion operation. Then, the following propulsion pipe 25 is added to the rear end of the propulsion body 3, and the same operation as described above is repeated. The propulsion pipe 25 that is continuously propelled advances into the soil while being guided by the soil guide 21, and the propulsion pipe 25 that is coupled to the rear end is received by the receiving mechanism 8 to perform the coupling work.

During the propulsion, the inclined pressure receiving surface 24a of the propulsion head 24 receives the earth pressure during the propulsion, and the direction is changed to the direction in which the earth pressure is received. If you want to rotate 180 ° periodically to raise the curve,
The inclined pressure receiving surface 24a is propelled while being set so as to face downward. In this way, the propelling body 3 is advanced while replenishing the propelling pipe 25 and controlling the propelling direction, and a small diameter hole is drilled to the ground surface or the reaching pit at the target position.

After punching to the target position, the propulsion head 24
Is replaced with a diameter-expanding head or an embedded pipe is connected, and the propulsion device is operated in reverse to pull back the propulsion body 3 to embed the embedded pipe. And finally, the soil guide 21 is hooked to the tool 42.
The clamp body 17 is engaged with the clamp body 17 via
Complete the work by pulling out by moving 7. While the propelling body 3 is being pulled back, the buried pipe connecting fitting remains in the soil guide 21 or debris enters between the propelling body 3 and the propelling body 3.
When it becomes difficult to pull back the sheet, the hook tool 42 is engaged only with the upper split guide 21U, and the upper split guide 21U is separated from the lower split guide 21D and pulled out.

The present invention is not limited to the above embodiment, but can be variously modified. For example,
The propulsion device 1 may be of a type in which the propulsion device 3 is placed on the ground, the propulsion body 3 is pierced from the ground surface into the soil, and the propulsion body 3 is propelled into the ground and then comes out to the ground surface again. It may be a dynamically operable one, or one that is excavated while rotating and excavating.

In the clamp mechanism 6, the fixed holding member 33 may be provided in the upper body 17B, and the movable holding member 35 and the elevating means 34 may be provided in the lower body 17A. The elevating means 34 rotates a screw shaft by human power or a motor. Alternatively, the movable holding member 35 may be moved. The engaging part 12 and the engaged part 13 of the soil guide 21 may be one place or three or more places in the front-rear direction, and the extraction from the soil may be performed artificially with a tool such as a crowbar.

Locking protrusion 14 of split guides 21U, 21D
Also, the hooking tool 42 of the clamp body 17 may be configured such that the tongue pieces that are vertically displaced are projected, the bolt holes are formed in each, and the two are engaged with each other by passing the bolts.

[0036]

According to the present invention described in detail above, since the tubular soil guide 21 is detachably divided into two parts by the dividing surface L passing through the substantially axial center, the two dividing guides 21U and 21D are provided. It is possible to separate one by one and extract it from the soil, so the extraction work can be done easily and easily, and labor can be saved.

Two split guides 21U, 21D
In addition, since the engaging portion 12 and the engaged portion 13 that engage with each other by the movement in the axial direction to engage and disengage to regulate the radial division are formed, they can be easily separated and united. Further, the pull-out locking projection 14 that engages with the clamp mechanism 6 in a detachable manner.
Since it is formed, the soil guide 21 can be easily pulled out by the clamp mechanism 6 that clamps and pushes the propulsion body 3, and the pulling out can be as simple as pushing.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a cross-sectional side view of the entire propulsion device.

FIG. 4 is a partial cross-sectional plan view of the entire propulsion device.

FIG. 5 is a side view showing a propulsion state of the propulsion body and a work of connecting the propulsion pipes.

FIG. 6 is a front view of the propulsion device.

FIG. 7 is a front view of the soil guide.

FIG. 8 is a side view showing a propulsion work state of the propulsion device.

[Explanation of symbols]

1 propulsion device 2 pits 3 propelling bodies 4 equipment frame 5 Pushing mechanism (hydraulic cylinder) 6 Clamp mechanism 7 Auxiliary clamp mechanism 8 receiving mechanism 9 Installation mechanism 12 Engagement part 13 Engagement part 14 Locking protrusion 17 Clamp body 21 Underground guide 21U split guide 21D split guide L split surface

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Akira Tanaka, 64 Ishizukita-machi, Sakai-shi, Osaka Prefecture Kubota Co., Ltd.Sakai Factory (72) Kenzo Koga, 64, Ishizukita-machi, Sakai-shi, Osaka Kubota Sakai Manufacturing Co., Ltd. In-house (72) Shiro Sugiyama, 64 Ishizukita-machi, Sakai-shi, Osaka Kubota Sakai Works, Inc. (72) Inventor, Yoshiaki Miyahara, Ishizu-kita-cho, Osaka, Sakai-shi, Osaka (72) Invention Person Yuji Tsutsui 64 Ishizukita-machi, Sakai City, Osaka Prefecture, Kubota Co., Ltd.Sakai Plant (72) Inventor Toshiaki Otani 64, Ishizukita-machi, Sakai City, Osaka Prefecture (72) Inventor, Masaya Hattori Osaka Prefecture 64 Ishizukita-machi, Sakai City, Kubota Sakai Plant (56) References: Actual Kaihei 4-119893 (JP, U) Actual Kohei 8-2228 (JP, Y2) ( 58) Fields investigated (Int.Cl. ⁷ , DB name) E21D 9/06 311 E21D 9/06 301

Claims (2)

(57) [Claims] 1. A tubular soil guide (21) which rushes into the soil and guides a thrusting body (3) through it is detachably divided into two parts by a split surface (L) passing through a substantially axial center , and one of Split guide (21
The engaging portion (12) is formed in U), and the other split guide (2
1D) axial direction with respect to one split guide (21U)
By the movement, it engages with the engaging portion (12) in a disengageable manner.
An underground guide for a propulsion device, characterized in that an engaged portion (13) for restricting radial division is formed . 2. A propelling body (3) is sandwiched between device frames (4).
Clamp mechanism (6) and the clamp mechanism (6)
Pushing mechanism (6) to move and soil guide slide axially
Auxiliary clamp that supports freely and fixes at the forward protruding position
A mechanism (7) is provided, and the both split guides (21U, 21
D) Hook provided on the clamp mechanism (6) on the outer periphery of the rear end.
Locking protrusion for pulling out which engages with the fitting (42) in a detachable manner.
The soil guide of the propulsion device according to claim 1, wherein (14) is formed.