JPH04161590A - Propulsion device for jacking method, and jacking method - Google Patents

Abstract

PURPOSE:To promote work efficiency by holding a propeller device capable of switching into a bendable state and a no-bendable state with a holding and pushing device to push it into the ground, and releasing the holding to repeat progress of work to return the holding and pushing device. CONSTITUTION:A propeller device is so constituted that connecting sections of a plurality of propellers B are capable of switching between a bendable state and a no-bendable state, and it is held with a holding and pushing device 3. After that, the holding and pushing device 3 in a state of holding is moved forward of the direction of the propeller axial center, and the propeller device is pushed into the ground. During the pushing progress of work, the connecting sections of the propellers B is switched from the bendable state to the no- bendable state. Then, the holding state is released, the holding and pushing device 3 in a state to release holding is moved backward of the direction of the propeller axial center to return it to basics. The propellers B are driven into the ground by repeating the pushing progress of work and returning progress of work alternately.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a propulsion device used in a propulsion method in which a propulsion device consisting of a plurality of connected propulsion bodies is pushed into the soil, and the construction of the propulsion method. Regarding how to do it efficiently.

[Conventional technology]

The present inventors connected adjacent ones of a plurality of propellant bodies with each other by a bendable connecting part to form a series,
We previously developed a method in which the series of propellants is wound up and stored in a winding drum in advance, and then fed out from the winding drum and pushed into the soil.

However, in this method, when the serialized propellants are wound up and stored on a winding drum, the degree of bending of the connecting portions is insufficient, so that the propellant device cannot be wound up and stored in a compact manner. There are some things I can't do. Therefore, it may be considered to increase the number of flexible connecting parts, but
If the number is simply increased, smooth propulsion may not be possible when the propellant is linearly propelled underground.

Therefore, in order to avoid the above-mentioned situation, the present inventors have developed a further improved version of the series propellant. That is, there is a bending inhibited state in which at least a portion of the connecting portion is brought into contact with an end of one of the adjacent propelling bodies to prevent the connecting portion from bending, and a state in which bending is prevented from occurring from that end toward the other propelling body. A propulsion unit is provided with a stopper ring that is slidably provided along the longitudinal direction of the propulsion body and is provided with a stopper ring that is separated and switched to a bendable state that allows bending of the connecting portion. It was developed as a replacement.

In such a propellant device, when it is desired to compactly wind and store it on a winding drum, the connecting portion can be switched to a bendable state so that the connecting portion can be bent as appropriate, and the propellant device can be A state suitable for winding and storing on a winding drum can be achieved. Further, when the propellant device is to be propelled linearly in the soil, the connecting portion is switched to a bending prohibition state to prevent bending at the connecting portion, and the propellant device is smoothly propelled straight through the soil. I can do it.

[Invention or problem to be solved]

However, even when using a propellant device with the above-mentioned improvements, there are still problems to be solved as described below.

That is, the switching operation of the connecting portion between the two states has a problem in that the operability is poor and the work efficiency is low.

The present invention has been made in view of the above circumstances, and provides a propulsion device and a propulsion device that can improve the working efficiency of the switching operation of the connecting portion between the two states when the improved propulsion device is used. The purpose is to provide a propulsion method.

[Means to solve the problem]

The characteristic configuration of the propulsion device for the propulsion method according to the present invention is that a connecting portion that bendably connects adjacent propellant bodies to connect a plurality of propellant bodies in series is provided in a large amount of adjacent propellant bodies, and At least a portion of the connecting portion is brought into contact with an end of one of the adjacent propelling bodies to prevent bending of the connecting portion, and is separated from the end toward the other propelling body. Switching the connecting portion to a bendable state that allows bending of the connecting portion. A propulsion device for a propulsion method is provided with a clamping and pushing device that pushes the propellant device into the soil by propelling it along its longitudinal direction while clamping the stopper ring, and the stopper ring. a clamping part that can be freely switched to a state where the clamping is released; a movement operation part that reciprocates the clamping part in the longitudinal direction of the propelling body with respect to the clamping and pushing device; a detection device for detecting whether the clamping portion is in a position suitable for clamping the stopper link; The invention also includes a control section that operates the clamping operation.

Further, the characteristic structure of the propulsion method according to the present invention is that a plurality of propellants are connected, and at least a part of the connected portion is in a bendable state that allows a bent posture and in a straight state that prohibits a bent posture. The propulsion unit, which can freely change the state between a state in which bending is prohibited and held in a posture, is held by a clamping and pushing device, and the clamping and pushing device in the clamped state is moved forward in the direction of the axis of the propellant to propel the device. a pushing step of pushing the body device into the soil, and releasing the clamping state of the propellant device by the clamping and pushing device, and moving the clamping and pushing device in the released state of the clamping device backward in the direction of the axis of the propelling body to perform the clamping and pushing process. A propulsion method in which the propelling body is propelled into the soil by repeating a return step of returning the device to its origin, wherein during the pushing step, the state-switchable connecting portion of the propellant device is bent. The point is to perform a switching operation from the bending enabled state to the bending prohibited state.

[For production]

According to the device of the present invention having the above-mentioned configuration, the detecting device is used to detect a state in which the holding portion is at a position suitable for holding the stopper link, and the control portion is controlled based on the detection result. By causing the clamping part to clamp the stopper ring and moving the clamping part in the longitudinal direction of the propellant using the moving operation part, the switching operation of the connecting part between the two states can be mechanically performed. What can you do?

Furthermore, according to the construction method of the present invention having the above configuration, during the pushing step, the switching operation of the state-switchable connecting portion from the bendable state to the bending prohibited state is performed;
The switching operation is performed in parallel with the propulsion operation of the propelling body.

[Effects of the Invention] According to the device of the present invention, the switching operation between the two states of the connecting portion is performed mechanically, and the workability during the operation is improved.

Further, according to the construction method of the present invention, the switching operation is performed in parallel with the propulsion operation of the propelling body, so that time-efficient work can be performed.

Thus, according to the propulsion device and propulsion method according to the present invention,
It becomes possible to improve the working efficiency of the switching operation between the two states of the connecting portion.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 3, (A) shows the propellant device,
The propulsion device (A) consists of a combination of a propulsion head (1) and a plurality of propulsion tubes (2), which are connected in advance via a connecting portion (J).

This propellant device (A) is propelled into the ground by a propulsion device according to the present invention, which will be described below.

In the construction pit (5), a propulsion pipe (2) is inserted into the soil in order to hold and press the propellant device (A) and propel the propulsion head (1) at its tip into the soil. A clamping and pushing device (3) for pushing is provided. In addition, in the clamping and pushing device (3), the said propellant device (A)
Once the above-mentioned pressing is performed, the clamping state is once released, and the device (3) in the clamping released state moves toward the propellant axis (
P) is moved backward in the direction and returned to the origin. When the propellant device (A) continues to be propelled, the steps of pressing and returning to the origin are repeated. In addition, in the clamping and pushing device (3), the plurality of propulsion pipes (2) are guided into the soil while being held in a state where their axes are aligned substantially in a straight line near the point where they are to be penetrated into the soil. A guide member (4) is provided.

Further, a winding drum (6) for winding and storing the propellant device (A) is provided on the upper outer side of the construction pit 1 (5). Note that (14) in the figure is a support jack that supports the side wall of the construction pitch I□ (5) from the inside so that it does not collapse, and (15) in the figure is a support jack that supports the winding drum (5).
This is a guide roller that supports and guides the propelling body (B) that is fed out from 6).

The propulsion head (1) includes a head body (IA) with a small diameter of, for example, 50 to 70 mm, and a propeller axis (P) (propulsion It consists of an excavation part (IB) that is rotatably attached to the tip side around the head axis (P9).

The excavation part (IB) is provided with a mechanism for biasing the propulsion direction of the propulsion head (1) in the direction in which the propulsion head (1) receives the soil and receives the upper pressure as the propulsion head (1) is propelled into the soil. 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 (P) facing the opposite side to the side to be turned, and the earth pressure received by the pressure receiving surface (F) causes the propulsion head (1) to move in the direction of propulsion or the pressure receiving surface (P).
F) will now be directed to the opposite side.

A connecting part (J) that connects adjacent ones of the plurality of propellants (B), namely a connecting part (J) that connects the propulsion head (1) and the propulsion tube (2). , and a connecting portion (J) that bendably connects adjacent propulsion tubes (2) to each other, and is configured as described in detail below (see FIGS. 4 to 7).

That is, in the connection part (I), the joint attachment formed at the end (B2) of the propelling body (B) at the rear (in FIGS. 4 to 6, the left side corresponds to the rear) The joint member (12) is screwed and fixed to the inner surface of the part (B4), and the end (B, ) of the propelling body (B) adjacent to the front of the propelling body (B) is
A fitting receiving portion (13) is formed into which the joint member (12) is received swingably in a direction orthogonal to the propellant core (P). The joint member (12) is provided in a posture along the longitudinal direction of the propellant (B), and is attached to the shaft portion (12) formed at the rear part.
a) and a spherical joint part (+2b) formed at the front part thereof. Its shaft portion (+2a) is screwed and fixed to the front portion of the rear propulsion body (B), and its spherical joint portion (
12b) is pivotally fitted into a fitting receiving portion (13) provided at the rear of the forward propelling body (B).

A part of the plurality of connecting parts (J) is shown in FIGS. 4 and 5 (
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. 5(B).

In addition, the remaining parts of the plurality of connecting parts (J) are shown in FIGS. 4 and 6.
As shown in FIG. 7 and FIG. 7, a switching means (
It consists of a switchable connection part (J2) with a switchable connection part (J2).

Specifically, the switching means (K) is a strapper 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 surface 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) Rotation around the device is smooth. Incidentally, the bush (21) is made of a slide hair ring made of, for example, sintered alloy, Teflon, or the like. Further, the space (S) that allows the tension part (8a) of the stopper ring (8) to retreat from the end (B1) 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 (J,) of (B) so that it does not take a bent position, the bending inhibited state is achieved, and it is again rotated as appropriate around the propellant core (P). At the top, insert the tension part (8a) into the space part (
By evacuating to S), both the propellant bodies (B),
The bendable state can be achieved by making the switchable connecting portion (Jl) of (B) capable of taking a bent position.

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.

The operating device (C) is, as shown in FIGS. 1 and 2,
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).
) at the position of the moving operation unit (8
2).

As shown in FIG.
), 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 stroke (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 move the rod forward and backward by an appropriate distance, the vertical base (82b) is driven and controlled.
81B) is capable of reciprocating the propelling body (B) in the longitudinal direction when it reaches the position of the holding and pushing device (3) while accompanying the finger unit 1-(81A).

Based on the controlled drive of the finger unit (81b), which is the main component of the holding part (81), a pair of finger members (81a), (81a) are moved around the stopper ring as shown in FIG. (8) It has a structure in which they are brought closer to each other and separated from each other in order to clamp and release.

The finger unit (81A) is connected to an elevating cylinder (81E) with respect to a rotating base (81D) 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) without meshing with the arcuate rack (81d) formed at an appropriate position on the upper end of the vertical base (81B), 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 (8]a) in the longitudinal direction of the propellant (B) at the lowest end of the vertical base (8]B).

(81a) is attached so that the distance from it is constant □
It consists of a limit switch. The operating piece (83a) of the limit switch can slide on the circumferential surface of each propellant (B) along its longitudinal direction, and is placed at an appropriate position on the circumferential surface of the propellant (B). Surrounded recess (
B5) (see Figures 4 and 5). In a state in which the operation piece (83a) of the limit switch is fitted into the recess (B), the clamping part (81) is in a position suitable for clamping the stopper ring (8). 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.

When propelling the propellant device (A) into the ground, use the operating device (C) to
), in the process of propelling the propellant device (A), the detection device (83) detects whether the clamping portion (81) or the stopper ring (8) is in a position suitable for clamping the stopper ring (8). The current state is detected, and in response to the detection, a series of operations for switching the state by the operating device (C) are automatically performed. A series of operations for switching the state are also performed in parallel with the propulsion device (A) being propelled. Note that the series of operations is specifically 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 I- (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 I-(81A). At (81A), the stopper ring (8) is clamped. Then, while maintaining the clamping state, the entire clamping part (81) is moved forward by driving the reciprocating cylinder (82b),
After that, the rotation base (81D) is rotated by the drive of the motor (81F) so that the tension portion (8a) can exit from the space (S) and become in a tensioned state. and then remove the stopper ring (8
). And the stopper ring (8)
The tension portion (8a) of is put into a tension state, and it is switched to a bending prohibited state. After that, the hydraulic drive means (
81b) in the opposite direction to release the stopper ring (8) from being held by the finger unit (81A). After reaching this state, the finger unit (81A) is moved by driving the lifting cylinder (81E) in the opposite direction so as not to impede the promotion of the finger unit (81A) or 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 propelling body (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), switch the switchable coupling portion (L) in the reverse procedure to the above-mentioned operation, and thereby the propellant device (A) is brought into a state suitable for winding and storing on the winding drum (6).

[Another example]

As the detection device, means in place of the limit 1 to switch may also be considered. For example, there may be a method in which a marking is previously applied to the surface of the propelling body and the marking is read by a known reading device, or a method in which the connecting portion is directly read by a laser sensor.

Further, the switchable connecting portion is provided with a stopper ring having a tension portion that comes into contact with the end of the forward propelling body to realize the bending prohibited state, as in the above-described embodiment. The present invention also applies to a propulsion device in which the tensioned state of the stopper ring is not maintained by its rotational movement, but is maintained by other locking means after forward movement. equipment can be applied.

For example, the device of the present invention can also be applied to a propulsion device configured such that when the stopper ring moves forward until it reaches a tensioned state, it is locked with a locking pin or the like and maintained in that state. Can be applied. In a propulsion device that operates a propellant device having such a configuration, a mechanism for rotating the clamping portion is not required, and instead,
Is it necessary to provide 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 a bent posture of the connecting portion is allowed and a bending prohibited posture in which the bent posture is prohibited and a straight posture is maintained. The device of the present invention can also be applied to a propellant device configured as follows.

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]

Figures 1 to 6 show an embodiment of the propulsion method coffin and propulsion device according to the present invention, with Fig. 1 being a side view showing the main parts of the propulsion device, and Fig. 3 is a side view showing the entire propulsion device, FIG. 4 is a vertical sectional view showing both the bendable connection portion and the switchable connection portion of the propulsion device propelled underground by the propulsion device, and FIG. Figures (A) and (B) are longitudinal cross-sectional views showing the bendable connection portion of the propellant device in a straight state and a bent state, and Fig. 6 is a vertical cross-sectional view showing the switchable connection portion of the propellant device. FIG. 4 is a cross-sectional view taken along line VI--VI in FIG. 4, and FIG. 7 is an exploded perspective view showing the main parts thereof. (3)... Clipping and pushing device, (6)... Winding drum, (8)... Stopper ring, (
81)... Holding part, (82)... Moving operation part, (83)... Detecting device, (84)...
・Control unit, (A)... Propulsion device, (B)...
・Propellant, (C)... Operating device, (P)...
...Propellant axis, (J)...Connection part.

Claims (1)

[Claims] 1. A connecting portion (J
) is provided between the adjacent propellant bodies (B), (B), and at least a part of the connection part (J) is provided with a propellant (B) of one of the adjacent propellant bodies (B), (B). ) is in contact with the end of the connector (J) to prevent the connector (J) from bending, and the connector is separated from the end toward the other propelling body (B) to prevent the connector (J) from bending. The stopper ring (8) to be switched to the permissible bendable state is connected to the propelling body (B).
A propellant device (
For A), a clamping and pushing device (3) that grips the propellant (B) of the propellant device (A) and propels it along its longitudinal direction to push the propellant device (A) into the soil. A propulsion device for a propulsion method, comprising: a clamping part (81) that can be switched between a state of clamping the stopper ring (8) and a state of releasing the clamping of the stopper ring (8); a movement operation section (82) that reciprocates the section (81) in the longitudinal direction of the propelling body (B) with respect to the clamping and pushing device (3); A detection device (
83), and when the clamping part (81) in the released state comes to a position suitable for clamping the stopper ring (8) based on the detection result from the detection device (83), the clamping part (81) is moved. A propulsion device for a propulsion method, comprising a control unit (84) that performs a clamping operation. 2. A plurality of propulsion bodies (B) are connected, and at least a part of the connecting part (J) is in a bendable state that allows a bent posture and in a bent state that prohibits a bent posture and maintains a straight posture. The propulsion device (A), which can be freely switched between the prohibited state and the prohibited state, is held by the holding and pushing device (3), and the holding and pushing device (3) in the held state is moved in the direction of the propellant axis (P). a pushing step of moving the propellant device (A) forward and pushing it into the soil; and a pushing step of releasing the clamping state of the propellant device (A) by the clamping and pushing device (3) and pushing the propellant device (A) in the released state. Device(
A propulsion method in which the propellant (B) is propelled into the soil by repeating the return step of moving the device (3) backward in the direction of the propellant axis (P) and returning the clamping and pushing device (3) to its origin. The propulsion method further comprises switching the state-switchable connecting portion (J) of the propulsion body device (A) from the bendable state to the bend-prohibited state during the pushing step.