JPH04161694A - Propulsion device for jacking method and jacking method thereof - Google Patents

Abstract

PURPOSE:To improve operability and smooth operation by connecting a propellent pipe of a propellent head with a connecting member capable of changing over the propellent member to the bent and straight state and changing over the propellent pipe to the straight state in the propelling with an operating device to force the propellent head. CONSTITUTION:A propellent head 1 forced in the ground by a propellent pipe 2 is connected with a connecting member J provided with a joint member J2 capable of changing over a propellent pipe 2 forced in the ground to the bendable and unbending straight state so that the propellent pipe can be taken up by a take-up drum 6. The joint member is rotated by a predetermined angle with the change-over joint member J2 to be changed over to the bent and straight state. Next, while the propellent pipe 2 is unwound from the drum 6 in the propulsion it is changed over to the straight state by an operating device (c) and forced into the ground by a forcing device 3, so that the efficiency of operation can be improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a propulsion device for a propulsion method and a propulsion method, and more specifically, the present invention relates to a propulsion device for a propulsion method and a propulsion method, and more specifically, a plurality of A propellant device made up of a series of propellants, a winding drum that winds up and stores the propellant device, and the propellant device that is unwound from the winding drum is held and pushed into the soil to propel it through the soil. A propulsion device for a propulsion construction method equipped with a clamping and pushing device, and a plurality of propulsion bodies in which both adjacent propulsion bodies are connected by a flexible connection part are unrolled from a winding drum that is stored and pushed into the soil. Regarding propulsion method.

[Conventional technology]

In conventional propulsion devices, immediately before pushing a plurality of propellant bodies into the soil, the propellant bodies are connected one after another, and the connected propellant bodies are pushed into the soil.

By the way, the process of sequentially connecting the propellant bodies immediately before pushing them into the soil is inefficient, so in order to eliminate this process, adjacent propellant bodies are connected by flexible connecting parts. , a propulsion device in which the propellant device is made into a series of propellant devices, the propellant device is wound up and stored in a winding drum in advance, and is fed out from the winding drum and pushed into the soil, The present inventors have previously developed this method.

[Problem to be solved by the invention]

However, even in the propulsion device previously developed by the present inventors, there are problems that should be improved as described below.

That is, when the propellant device is wound up and stored on a winding drum, depending on the structure and number of connecting parts of the propellant device, the degree of bending may be insufficient, making the propellant device compact. There is a problem in that it may not be possible to wind up and store the product. Therefore, it is possible to increase the number of bendable connecting parts, but if the number is simply increased, smooth propulsion will not be possible when the propellant is propelled linearly in the soil. A problem will arise.

The present invention has been made in view of the above circumstances, and even when the propellant is wound up and stored on a winding drum, it can be rolled up and stored compactly, and furthermore, the propellant can be linearly propelled underground. It is an object of the present invention to provide a propulsion device and a propulsion construction method that enable smooth propulsion even in cases where the propulsion is carried out, and that have good workability during construction.

[Means to solve the problem]

The characteristic configuration of the propulsion device for a propulsion method according to the present invention is such that at least a part of the connecting portion of the propulsion device is in a bendable state that allows the bending posture and in a straight posture that prohibits the bending posture. It is comprised of a switchable connection part that can switch the state between a bending prohibited state, and is provided with an operating device that automatically operates the state switching in the switchable connection part, Its actions and effects are as follows.

[For production]

In such a propulsion device for a propulsion method, when it is desired to compactly wind and store the propellant on a winding drum, the switchable connecting portion is automatically switched to a bendable state using the operating device. It is possible to appropriately bend the connecting portion, thereby making it possible to put the propellant device in a state suitable for winding and storing on a winding drum.

Furthermore, when it is desired to propel the propellant in a straight line in the ground, the switchable connection section is automatically switched to a bending inhibited state using the operating device, thereby preventing bending at the connection section. The propellant device can be held in a linear posture and can move smoothly in a straight line through the soil.

〔Effect of the invention〕

Therefore, according to the propulsion device of the present invention, when the propellant is wound up and stored on the winding drum, it can be rolled up and stored compactly, and furthermore, when the propellant is propelled linearly in the ground, it can be smoothly rolled up and stored. This makes it possible to promote Moreover, in the propulsion device of the present invention, since the state of the connecting portion is automatically switched by the operating device, the operability thereof is improved.

[Second Characteristic Configuration of the Present Invention] A characteristic configuration of the propulsion method according to the present invention is that after the propellant is paid out from the winding drum, a part of the connecting portion is prohibited from being bent and placed in a straight posture. The point is to push it into the soil.

According to the method of the present invention, when it is desired to propel the propellant in a straight line in the soil, a portion of the connecting portion is prohibited from being in a bent position and taken into a straight position, and then the propellant is pushed into the soil. Therefore, it is possible to move smoothly in a straight line through the soil.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

In FIG. 7, (A) shows a propellant device constituting a part of the propulsion device according to the present invention, and the propellant device (A) includes a propulsion head (1) and a plurality of propulsion tubes. (2)...
They are connected in advance via a connecting part (J).

This propellant device (A) is propelled into the ground by the device described below.

Inside the construction bit (5), the propellant device (A) is held and pressed, and the propulsion tube (2) is pushed into the soil in order to propel the propulsion head (1) at the tip into the soil. A clamping and pushing device (3) is provided. Incidentally, the holding and pushing device (3) also constitutes a part of the propulsion device. A guide member (4) is provided that guides the plurality of propulsion pipes (2) into the soil while maintaining their axes aligned substantially in a straight line near the point where the plurality of propulsion pipes (2) enter the soil. Further, a winding drum (6) for winding and storing the propellant device (A) is provided above and outside the construction bit (5). In addition, (14) in the figure is a support jack that supports the side wall of the construction bit (5) from the inside to prevent it from collapsing, and (15) in the figure is a support jack that supports the winding drum (6). This is a guide roller that supports and guides the propelling body (B) that is fed out from the propeller (B).

The propulsion head (1) includes a head main body (IA) having a small diameter in the order of, for example, 50 to 70, and a propellant axis (P) (propulsion It consists of an excavation part (IB) attached to the tip side so as to be rotatable around the head axis (P).

The excavation part (IB) receives earth pressure as the propulsion head (1) is propelled into the soil, and is configured to bias the propulsion direction of the propulsion head (1) in the direction in which the upper pressure is received. The pressure receiving surface (F) is formed as an inclined surface near the axis (P) on the distal end side. When the propulsion head (1) is made to advance straight, the excavation portion (IB) is rotated relative to the head body (IA) while being propelled;
When turning, it is propelled with the pressure receiving surface (F) facing the opposite side to the side to be turned, and due to the earth pressure that the pressure receiving surface (F) receives, the direction of propulsion of the propulsion head (1) is directed to the pressure receiving surface (
F) will now be directed to the opposite side.

a connecting part (J) that connects adjacent ones of the plurality of propellants (B), that is, a connecting part (J) that connects the propulsion head (1) and the propulsion tube (2); The connecting portion (J) that bendably connects adjacent propulsion tubes (2) is configured as described in detail below (see FIGS. 1 to 4).

That is, in the connecting part (J), the rear (Figs. 1 to 3)
In the figure, the left side corresponds to the rear) on the inner surface of the joint attachment part (B4) formed at the end (B2) of the propellant (B).
The joint member (12) is screwed and fixed, and its propellant (
A fitting receiving portion (B) for receiving the joint member (12) so as to be swingable in a direction orthogonal to the propellant core (P) is attached to an end (B1) of the propellant (B) adjacent to the front of the propeller (B). ■3) is formed. The joint member (12) is provided in a posture along the longitudinal direction of the propelling body (B), and is attached to a shaft portion (12a) formed at the rear part.
) and a spherical joint part (12b) formed at the front part thereof.

The shaft portion (12a) is screwed and fixed to the front portion of the rear propellant body (B), and the spherical joint portion (12b) is connected to a fitting receptacle provided at the rear portion of the front propellant body (B). It is fitted into the portion (13) so as to be able to swing freely.

Some of the plurality of connecting parts (J) are shown in FIGS. 1 and 2 (
As shown in A) and (B), a flexible connecting portion (
Jl). Such a flexible connection part (J
1), the elastic deformability of the sealing member (10) allows it to assume the bent position shown in FIG. 2(B).

In addition, the remaining parts of the plurality of connecting parts (J) are shown in FIGS. 1 and 3.
As shown in FIG. 4 and FIG. 4, a switching means (
It consists of a switchable connection part (J2) with a switchable connection part (J2).

Specifically, the switching means (K) includes a stopper ring (8 ). In this embodiment, the strut portion (8a) also comes into contact with the end portion (B2) of the rear propulsion body (B) in the bending prohibited state.

The rear end face of the stopper ring (8) is uneven, and the portion corresponding to the convex portion is wide to form the tension portion (8a). The stopper ring (8) is attached to the joint mounting portion (B4).
is fitted onto the outer surface of the propeller through a bushing (21) that functions as a sliding member and a sliding bearing, and due to the presence of the bushing (21), sliding in the direction of the propellant axis (P) and movement of the propellant axis (P) Smooth rotation around the area. The bush (21) is made of a slide bearing made of, for example, sintered alloy or Teflon. In addition, a space (S) that allows the tension part (8a) of the stopper ring (8) to retreat from the end (B,) is located at the front end (B2) of the rear propelling body (B). ) is formed.

According to such a stopper ring (8), the tension portion (8a) can be rotated appropriately around the propellant core (P).
the adjacent propellant (B), and the end (Bl) of (B)
, (B2) and both propellant bodies (B),
By tensioning the switchable coupling part (Jl) of (B) so that it does not take a bent position, the above-mentioned bending inhibited state is achieved, and at the same time, by appropriately rotating it around the propellant core (P), The tension part (8a) is connected to the space part<
S>, both the propellant bodies (B),
By enabling the switchable connecting portion (Jl) in (B) to take a bent position, the bendable state can be realized.

The switching operation between the bendable state and the bendable prohibited state of the stopper ring (8) is automatically performed by an operating device (C) described below. Note that the operating device (C) also constitutes a part of the propulsion device.

The operating device (C) is as shown in FIGS. 5 and 6.
It is provided with a clamping part (81) that can freely switch between a state of clamping the stopper ring (8) and a state of releasing the clamping, and the clamping part (81) is connected to the clamping and pushing device (3).
) is provided with a movement operation section (82) for reciprocating the propelling body (B) in the longitudinal direction.

As shown in FIG. 5, the moving operation section (82) is connected to a horizontal base (82a
), the main component is a longitudinally movable cylinder (82b) fixed in a horizontal position via a base (82c). The tip of the rod of the longitudinally movable cylinder (82b) is a horizontal guide member (81C) fixed on the horizontal base (82a).

(81C) can be freely moved in the horizontal direction, and
A vertical base (81A) that holds the finger unit (81A), which is the main component of the holding part (81), as described below.
81B). Therefore, when the longitudinal movement cylinder (82b) is driven and controlled to advance and retract the rod by an appropriate distance, the vertical base (
81B) is a propeller (81B) that has reached the position of the clamping and pushing device (3) while being accompanied by the finger unit (81A).
B) It is possible to reciprocate in the longitudinal direction.

- The finger unit (81A), which is a main component of the clamping part (81), is configured such that the hydraulic drive means (81
Based on the control drive of b), the pair of finger members (8
1a) and (81a) are moved toward and away from each other in order to clamp and release the stopper ring (8), as shown in FIG.

The finger unit (81A) is connected to a lifting cylinder (81B) with respect to a rotating base (810) that is rotatable around the axis (P) of the propelling body (B) along the vertical base (81B). It is attached so that it can be raised and lowered freely. The rotary base (81D) has a guided roller (81e) attached to the lower end of the vertical base (81B).
) with an arc-shaped guide hole (
A gear (81f) guided by the gear (81c) and interlocked with the output shaft of a motor (81F) attached to the upper end of the gear (81f).
By driving the motor (81F) while meshing with the arcuate rack (81d) formed at an appropriate position on the upper end of the vertical base (81B), the The propelling body (B) can be rotated around the axis (P).

Furthermore, the operating device (C) includes a detection device (83) for detecting whether or not the holding portion (81) is at a position suitable for holding the stopper ring (8),
Based on the detection result by the detection device (83), a control unit ( 84) is also provided.

Specifically, the detection device (83) includes the finger member (81a) in the longitudinal direction of the propellant (B) at the lowest end of the vertical base (81B).

It consists of a limit switch attached so that the distance from (81a) is constant. The operating piece (83a) of the limit switch is able to come into sliding contact with the surface of each propellant (B) along its longitudinal direction, and is positioned at an appropriate position on the circumferential surface of the propellant (B). Recessed part (B,)
(See Figures 1 and 2). When the operating piece (83a) of the limit switch is fitted into the concave portion (B5), the holding portion (81) is in a position suitable for holding the stopper ring (8). It is now detected.

Further, the control section (84) is provided as a part of the control device for the entire propulsion device, and the control section (84) includes the following:
A signal related to detection information from the detection device (83) is input, while a control unit (84) outputs a signal related to the detection information from the hydraulic drive means (81b), the lifting cylinder (81E), the motor (81F), and the control unit (84). Reciprocating cylinder (82b)
A signal related to drive control is output.

In the case of propelling the propellant device (A) underground, when switching the state of the stopper ring (8) using the operating device (C), in the process of propelling the propellant device (A), The detection device (83) detects the clamping portion (
81) is at a position suitable for clamping the stopper ring (8), and in response to the detection, a series of operations for switching the state by the operating device (C) are automatically performed. be exposed. The operation is performed as follows.

That is, before each propellant (B) of the propellant device (A) is pushed into the soil, the stopper ring (8) is in a bendable state (the tension portion (8a) is (is evacuated into the space (S)). In this state, first, the finger unit (81A) is moved to the upwardly retracted state (
In that state, the finger unit (81A) is in the released state) and is lowered to the position of the propelling body device (A), and then the hydraulic drive means (81b) is driven to drive the finger unit (81A). ) to clamp the stopper ring (8). Then, while maintaining the clamping state, the entire clamping part (81) is moved forward by driving the reciprocating cylinder (82b), and then the tension part (8a) is moved into the space (S). The motor (8)
1F) rotates the rotation base (81D), which rotates the stopper ring (8). Then, the tension portion (8a) of the stopper ring (8) is brought into a tension state, and is switched to a bending inhibited state. After that, the hydraulic drive means (81
b) in the opposite direction to remove the finger unit (8).
Release the clamping of the stopper ring (8) by 1A). After reaching this state, the finger unit (81A) is moved by driving the lifting cylinder (81E) in the opposite direction so that the finger unit (81A) does not interfere with the propulsion of the propelling body (B). is retracted upward, and the rotating base (81D) is returned to its original position by driving the motor (81F) in the opposite direction. Then, each time the propellant (B) is propelled, the above-described series of operations is repeated.

In addition, in order to compactly wind and store the propellant device (A) on the winding drum (6), the switchable connecting portion (Jl)
When automatically switching to the bendable state using the operating device (C), the switchable coupling portion (Jl) is switched in the reverse procedure to the above-mentioned operation, and thereby the propellant device ( A) can be brought into a state suitable for winding and storing on the winding drum (6).

[Another example]

Similar to the above-described embodiment, the switchable connecting portion includes a stopper ring having a strut portion that comes into contact with the end of the forward propelling body to realize the bending prohibited state, and the strut portion of the stopper ring Embodiments are also conceivable in which the state is not maintained by its pivoting movement as in the embodiments described above, but by other locking means after the forward movement. For example, it is conceivable that the stopper ring is moved forward until it reaches a tensioned state, and is then retained by a retaining pin or the like. In this case, the operating device does not require a mechanism for rotating the holding portion, and instead needs to be provided with a mechanism for operating the locking means such as the locking pin.

Further, all of the plurality of connecting portions are switchable connecting portions including switching means for switching between a bendable state in which the connecting portion is allowed to be in a bent position and a bendable prohibited state in which the bent position is prohibited and maintained in a straight position. An embodiment configured as follows is also conceivable.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

1 to 7 show an embodiment of the propulsion device for the propulsion method according to the present invention, and FIG. 1 shows both the bendable connection portion and the switchable connection portion of the propulsion device that constitutes a part thereof. FIGS. 2A and 2B are longitudinal sectional views showing the bendable connecting portion of the propellant device in a straight state and a bent state, and FIG. 3 is a longitudinal sectional view showing the switching of the propellant device. A cross-sectional view taken along the line ■-■ in FIG. 1 to show the flexible connection part,
FIG. 4 is an exploded perspective view showing the main parts thereof, FIG. 5 is a side view showing an operating device forming a part of the propulsion device, FIG. 6 is a front view thereof, and FIG. 7 is the entire propulsion device. FIG. (3)... Holding and pushing device, (6)... Winding drum, (A)... Propelling body device, (B)... Propelling body, (
C)...Operating device, (J)...Connecting part, (J2)...
‥‥Switchable connection part. Existing connection part.

Claims (1)

[Claims] 1. Both propellant bodies (B) adjacent to each other, (B) connected to each other by a flexible connecting part (J), and a plurality of propellant bodies (B)
A propellant device (A) made up of a series of .
) is a propulsion device for a propulsion method, comprising a clamping and pushing device (3) that clamps and pushes a material into the soil and propels it through the soil, wherein at least a part of the connecting portion (J) of the propellant device (A) is composed of a switchable connecting portion (J_2) that can switch the state between a bendable state that allows the bending posture and a bending prohibited state that prohibits the bending posture and maintains the straight posture. A propulsion device for a propulsion method, which is provided with an operating device (C) that automatically operates the state switching in the switchable connection portion (J_2). 2. Both propellant bodies (B) adjacent to each other, a plurality of propellant bodies (B) in which the (B) are connected by a flexible connecting part (J)
) is a propulsion method in which the propellant is rolled out from the winding drum (6) that is stored and pushed into the soil, and after the propellant is let out from the winding drum (6), a part of the connecting part (J) is A propulsion method that prohibits bending and assumes a straight position before pushing into the soil.