JPH03176594A - Propelling body for jacking method - Google Patents

Abstract

PURPOSE:To improve efficiency in the whole work of excavation with improvement in effectiveness of straight propulsion by connecting each of adjoining propelling tubes one another in the way of being capable of bending, and by providing a switching means that makes switching between a first behavior that permits the bending and a second behavior that does not permit the bending. CONSTITUTION:A propulsion head 1 and a plurality of propelling tubes 2 as propulsion bodies A having cylinder-like exterior are connected one another with connecting members J so that the body and the tubes become capable of bending. The propelling tubes 2 are forcibly pressed being kept unbent by operation of a switching means B. The propulsion head 1 for thrusting of the propelling tubes 2 into the earth and a pressuring device 3 for propulsion are provided in a work pit 5 for making of underground thrusting of the propulsion head 1 that is connected to the propelling tubes 2 into the earth. A guide member 4 is provided to a position wherefrom the plurality of propelling tubes 2 are thrusted into the ground, and thereby a thrusting device is built. A drum 6 for winding of the tubes is installed on the outside of the upper part of the work pit 5. Thereby straight propulsion of the tubes becomes available and operability in doing works can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a propulsion tube device, and more particularly to a propellant for a propulsion construction method in which adjacent propulsion tubes are bendably connected to each other by a connecting portion.

[Conventional technology]

In the conventional propulsion body mentioned above, it has been proposed to connect multiple propulsion tubes in advance so that it can be easily transported and excavation work can be carried out immediately at the site. It was constructed so that it could be bent at any time.

[Problem to be solved by the invention] However, in order to make it easier to wind up a plurality of connected propulsion tubes during transportation, etc., it is necessary to shorten the length of each propulsion tube or increase the degree of freedom of bending of the connecting portion. It is conceivable to make it possible to move the propellant by a large distance, but this has the drawback that during excavation propulsion, the entire propellant body buckles, which tends to reduce straight-line performance and makes propulsion operations difficult.

An object of the present invention is to make it possible to improve propulsion operability with high straight-line performance during excavation propulsion even if the entire propellant body can be bent with a smaller radius of curvature.

[Means to solve the problem]

The second feature of the structure of the propulsion body for the propulsion method of the present invention is that adjacent propulsion tubes are connected in a flexible manner by a connecting portion, and the connecting portion has a first state in which the propulsion tubes are allowed to have a bent posture. and a second state in which the propulsion tubes are prohibited from being bent to each other and the propulsion tubes are restricted to a posture substantially along the axial direction of the propulsion tubes. , in the connecting part, a tension part that comes into contact with each of the ends of the propulsion tubes adjacent to each other to maintain the second state is slidable in the axial direction with respect to the connecting part; , a recessed part provided on a stopper ring fitted externally so as to be rotatable about its axis, into which the tensioned part can be inserted and maintained in the first state, at either end of the two propulsion tubes; The second characteristic configuration is that adjacent propulsion tubes are connected to each other in a flexible manner by a connecting portion, and the connecting portion is in a first state in which the propulsion tubes are allowed to have a bent posture. and a second state in which the propulsion tubes are prohibited from being bent to each other and the propulsion tubes are restricted to a posture substantially along the axial direction of the propulsion tubes. , a stopper ring that is slidable in the axial direction of the connecting portion and fitted externally so as to be rotatable around the axial center is provided in the connecting portion, and a stopper ring is provided on the connecting portion and is fitted externally so as to be freely rotatable around the axial center; a first position in which one of the two is provided on the stopper ring and the other is provided on one of the two adjacent propulsion tubes, and is moved away from an end of the other propulsion tube to exhibit the first state; a state switching hole portion that allows movement of the stopper ring, and a state switching hole portion that allows the stopper ring to move from the second position to a second position where the second state is brought into contact with the end of the other propulsion tube; The elongated hole is formed at the third position where the state is maintained and the state maintaining hole portion that allows rotation of the stopper ring around the axis, and their effects are as follows. be.

[For production]

In other words, in the first characteristic configuration, when it is possible to wind up the entire plurality of connected propulsion tubes, the first state can be achieved by sliding the stopper ring so that the tension part fits into the recessed part. In addition, during excavation propulsion, after the stopper ring is slid in the direction along the axis of the stopper ring to separate the tension part from the recessed part, it is rotated around the tube axis and attached to each end of the adjacent propulsion pipes. If the second state is maintained by abutting the strut portions, the plurality of propulsion tubes can be maintained in a posture substantially along the axial direction and propelled through the soil.

According to the second characteristic configuration, the first
At the same time, while moving the engagement pin within the state switching hole, slide the stopper ring in the axial direction from the first state, and then rotate it around the axis to change the engagement pin to the state. By moving the stopper ring within the maintenance hole and bringing the stopper ring into contact with the end of the other propulsion tube, bending of the connecting portion can be prevented.

〔Effect of the invention〕

Therefore, the first state and the second state can be easily changed by simply moving the stopper ring along the length of the propulsion tube and rotating it along the circumferential direction of the propulsion tube. Can be switched quickly. After all, even if multiple propellant bodies can be wound up with a small radius of curvature during transportation, etc., it is possible to easily and quickly prevent or suppress the bending of the entire propellant body during excavation propulsion and improve its straightness. This has made it possible to improve the efficiency of the entire excavation work and improve the stability of propulsion control.

〔Example〕

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

As shown in Fig. 5, a propulsion head (1) and a plurality of propulsion tubes (2) are connected to a connecting part (
The propulsion tube (2) is connected to the propulsion tube (2) in advance so that it can be bent freely via J), and the propulsion tube (2) is pressed while being held so as not to bend. In order to propel the head (1) underground, a propulsion head (1) and a propulsion pressing device (3) for pushing the propulsion tube (2) into the ground are provided in the construction bit (5), and a plurality of propulsion tubes are provided. (2
) near the point where the bit is to be penetrated into the ground, a guide member (4) is provided that guides the bit into the ground while keeping its respective axes aligned in a substantially straight line to form a pushing device (A). A winding drum (6) for winding up the propulsion tube (2) is removably installed on the outside of the upper part of (5), thereby forming a propulsion device for the propulsion method.

In addition, (14) in the figure is a support jack that supports the side wall of the construction pit (5) from the inside, and (15) is a support jack that supports and presses the propulsion pipe (2) paid out from the drum (6). This is a guide roller that guides the member (17).

The propulsion head (1) includes a head body (1^) with a small diameter of, for example, 50 to 70 mm, and a head body (1^) with the same diameter as the head body (1^) and around the longitudinal axis (P) with respect to the head body (IA). Avoid the excavation part (IR) which is attached to the tip side so that it can rotate freely. The excavation part (IB) has a propulsion head (
1) receives earth pressure as it is propelled underground, and the pressure receiving surface (F) for biasing the propulsion direction of the propulsion head (1) in the direction in which the upper pressure is received is attached to the tip side of the pressure receiving surface (F). It is formed on an inclined surface close to the core (P).

That is, when the propulsion head (1) is moved straight, it is propelled while rotating the excavation part (IB) relative to the head body (IA), and when it is turned, it is radially opposite to the side to be turned. If you propel it with the pressure receiving surface (F) facing the side,
The pressure receiving surface (1') receives earth pressure and the propulsion direction of the propulsion head (1) is directed to the opposite side to the pressure receiving surface (F).

The connection part (J) between the propulsion head (1) and the propulsion pipe (2)
), and the propulsion tube (2), (2) connection part (
J) is constructed as follows, as shown in FIGS. 1 to 4.

That is, the joint member (12
), and at the same time attach the joint member (12) to the other end of the propulsion pipe (2) adjacent to one end of the joint member (12).
) is formed with a fitting receiving part (13) into which the receiving part can swing freely in two directions perpendicular to the axis (P) of the main body.

The joint member (12) is provided along the longitudinal direction of the propulsion tube (2), and has a shaft portion (12a) formed at the rear thereof.
and a spherical part (1) formed at the front part of the shaft part (12a).
2b). Shaft portion (12a) of joint member (12)
is screwed and fixed to the front part of the propulsion tube (2), and the joint member (
The spherical part (12b) of 12) is slidably fitted into a fitting receiving part (13>) provided at the rear of the propulsion head (1) or the propulsion tube (2).The fitting receiving part (13) is a propulsion support m (13a) that receives and receives the thrust force for propulsion equivalent to the pushing force from the rear, and a pull-out support that corresponds to the pulling force from the rear when pulling the propulsion device out of the soil. A retaining surface (13b) is formed to receive and stop the thrust force.

The receiving surface (13a) for propulsion is wide and has increased strength in order to receive strong thrust force for propulsion, and the receiving surface (13b) for retaining is designed to receive weak thrust force for pulling out. , the inner peripheral part of the rear end of the receiving part (13) and the shaft part (12a)
The surface is made narrower than the propulsion receiving surface (13a) in consideration of maintaining a sufficient gap so that the maximum bending angle is not impaired. That is, as shown in FIGS. 1 and 2, ltJ passing through the center of the spherical portion (12b)
'i side view, the inner end of the propulsion receiving surface (13a) is located closer to the axis (P) than the inner end of the retaining receiving surface (13b), and the Propulsion receiving surface (1
3a) has a wider surface than the retaining surface (13b).

Between the spherical part (12b) and the fitting receiving part (13),
A rotation regulating means (7) is provided for regulating the relative circumferential movement (i.e., rolling) of the two adjacent propulsion tubes (2), (2) around the axis (P).

The connecting portion (J) has a first state that allows the propulsion tubes (2), (2) to have a bent posture, and a first state that allows the propulsion tubes (2), (2) to have a bent posture.
2) Prohibit the bending posture between the propulsion tubes (2), (2)
A state switching means (13) is provided which can freely switch between a second state in which the state of the state is restricted to a posture substantially along the axial direction of the state.

The state switching means (B) includes a strut portion (2) in the connecting portion (J) that abuts on each end of the mutually adjacent propulsion tubes (2) and (2) to maintain the second state. 8
) is provided on a stopper ring (9) that is slidable in the direction of the axis (P) of the connecting part (J) and fitted externally so as to be rotatable around the axis (P), Tension part (8)
A recessed part (
10) is formed at the front end of one of the propulsion tubes (2), (2).

In other words, the tension part (8
) is in contact with the ends of the adjacent propulsion tubes (2), (2), respectively, to keep both propulsion tubes (2), (2) in a bent position, and fit into the recess (10). The tension portion (8) which has been brought into the first state (FIGS. 1 and 3) does not come into contact with each end of the propulsion tubes (2) and (2), allowing them to bend. .

The stopper ring (9) has a ball detent (1) inwardly biased to protrude by a spring (11).
8), a first engagement recess (19) that engages when the ball detent (18) is in the first state, and a second engagement recess (20) that engages when the ball detent (18) is in the second state. Toga,
The stopper ring (9) is shaped like a connecting portion (J) in the propulsion tube (2), and is designed to stabilize the position of the stopper ring (9) in both the first and second states.

On the outer peripheral surface of the stopper ring (9), a damage prevention groove (21) for hooking a finger is formed around the entire circumference so that it can be easily held and operated by hand.

In addition, as shown in FIG. 4, the tension portions (8) are provided at three locations of the stopper ring (9) at intervals of 60° in the circumferential direction. It is formed to have a length equal to tW#(ffi) between the ends and l1EiJ.

[Another example]

Another embodiment of the connecting portion (J) will be shown next.

As shown in FIG. 6, the state switching means (B) is configured such that the connecting portion (J) is slidable in the direction of its axis (P) and rotates around its axis (P). A stopper ring (9) that is movably fitted on the outside is provided, and the long hole (22) and its long hole (
One of the retaining pins (23) which can be slid freely within the stopper ring (9) is provided, and the other is
Both adjacent propulsion tubes (2).

(2), and as the engagement bottle (23) is slid within the long tube (22), the engagement pin (23) for the long tube (22) is moved to the other propulsion tube (2). from the first position (24) where the first state is brought out by being kept away from the end of the other propulsion tube (2), and the second position (25) where the second state is brought into contact with the end of the other propulsion tube (2). , the state switching hole (22A) is inserted into the elongated hole (22) so as to be able to slide, and the engagement pin (22A) is moved from the second position (25) to the third position (26) to maintain the second state. A condition maintenance hole (22B) is formed in the elongated hole (22) so that the hole 23) can slide therein.

In addition, as the stopper ring (9) is rotated from the second position to the third position, the state maintenance hole (22B)
If the stopper ring (9) is formed in a spiral shape so as to increase the pressure of contact with the other propulsion tube,
), the bending prevention effect of (2) increases.

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]

The drawings show an example of the propellant for the propulsion method according to the present invention,
Figures 1 and 2 are action explanatory diagrams showing a cross section of the main parts, Figure 3 is a plan view showing a partial cross section, Figure 4 is an exploded perspective view of the main parts, Figure 5 is a side view of the whole, and Figure 6 FIG. 2 is an exploded perspective view of a main part of another embodiment. (2)...Propulsion tube, (8)...Tension section, (9)...Stopper ring, (10)
・・・・・・Recessed part. (22)...Elongated hole, (22^)...State switching hole,' (22B)...State maintenance hole, (23>...・Engagement pin, (24)...
・First position, (25>...Second position, (26)
...3rd position, (J) ...Connection part, (
P)...Axle core, (B)...State switching means.

Claims (1)

[Claims] 1. Adjacent propulsion pipes (2), (2) connected to each other by a connecting part (J)
a first state in which the propulsion tubes (2), (2) are bendably connected to each other, and the connection portion (J) is in a first state in which the propulsion tubes (2), (2) are allowed to bend together; A state switching means (
B) and constituting the state switching means (B), in the connecting portion (J), the first and second propulsion tubes are in contact with respective ends of the two adjacent propulsion tubes (2), (2). The tension part (8) that maintains the second state is slidable in the direction of the axis (P) with respect to the connecting part (J), and
) A stopper ring (9) that is rotatably fitted around the
A recessed part (10) is provided in the two propulsion pipes (2), and the recessed part (10) into which the tension part (8) can be inserted and maintained in the first state is provided in the two propulsion pipes (2).
, (2) A propelling body for a propulsion method formed at one end of. 2. Connect adjacent propulsion pipes (2) and (2) to each other (J)
a first state in which the propulsion tubes (2), (2) are bendably connected to each other, and the connection portion (J) is in a first state in which the propulsion tubes (2), (2) are allowed to bend together; A state switching means (
B) is provided and constitutes the state switching means (B), the connecting portion (J) is slidable in the direction of its axis (P) and rotatable around its axis (P). A stopper ring (9) is provided that fits externally into the elongated hole (22) and the elongated hole (22).
) with the engaging pin (23) which is slidable within the
Provided on the stopper ring (9), the other one is
from a first position (24) provided in one of the two adjacent propulsion tubes (2), (2) and away from the end of the other propulsion tube (2) to exhibit the first state; The stopper ring (9) is placed in a second position (25) where the stopper ring (9) is brought into contact with the end of the other propulsion tube (2) to bring about the second state.
a state switching hole (22A) that allows movement of the second
a third position (2) that maintains the second state from position (25);
6) A propulsion body for a propulsion method in which the elongated hole (22) is formed from a state maintenance hole (22B) that allows rotation of the stopper ring (9) about the axis (P).