JPH0768861B2 - Propulsion machine for propulsion method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a propulsion device for a propulsion method for propelling and operating a propulsion body including a propulsion head and a propulsion pipe flexibly connected to the head.

[Prior Art] Conventionally, a contact portion that contacts the rear end portion of the propelling body was provided, and the propelling body was formed so as to be propellable through the contact portion.

[Problems to be Solved by the Invention]

However, when the rear end of the propelling body is abutted and propelled through the abutment part, the posture of the propelling body is unstable and the propelling direction of the propelling body may be misaligned.

An object of the present invention is to enable a propelling body to be propelled in a stable posture.

[Means for Solving the Problems]

The propulsion device for a propulsion method according to the present invention is characterized in that a clamping unit for clamping a propulsion body is provided, and a clamping length of the clamping unit with respect to the propulsion body is set to the propulsion pipe to be clamped and the propulsion pipe adjacent thereto. It is set to the straddling length,
The effect is as follows.

[Action]

That is, by pushing the propelling body with the holding portion and pushing it into the soil, the propelling body can be propelled in a stable posture compared to pushing the rear end portion of the propelling body, and moreover, it should be held by the holding portion. Since it is sandwiched not only by the propulsion pipe but also by the propulsion pipe adjacent thereto, it is easy to determine the propulsion direction of the entire propulsion body, and the pushing force by the propulsion device is efficiently transmitted to the front propulsion pipe.

〔The invention's effect〕

Therefore, the propelling body can be propelled in a proper posture, the propulsion operation of the entire propelling body can be performed efficiently and stably, and the working efficiency can be improved.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 5, a plurality of rigid short tube parts (2
A) (about 70 to 300 mm in length) and a plurality of bendable flexible parts (2) that are respectively interposed between the plurality of rigid short tube parts (2A).
Before propelling the propulsion pipe (2) formed with B) into the ground, a plurality of rigid short pipe portions (2A) and flexible portions (2B) are connected to each other in advance, and the propulsion pipe (2) In order to press, press the propulsion pipe (2) while holding it so that it does not bend,
In order to propel the propelling body (B) consisting of the propulsion pipe (2) and the propulsion head (1) connected to the propulsion pipe (2) into the ground, the propelling body (B) is placed in the construction pit (5). A propulsion unit (3) that pushes the ground into the ground is provided, and a plurality of rigid short pipe sections (2A) are arranged in a straight line near the location where the propelling body (B) penetrates into the ground. A pushing member (A) is formed by providing a guide member (4) for guiding the ground while holding the propulsion pipe (2) outside the construction pit (5).
A winding drum (6) on which is wound is installed to construct a propulsion device for a propulsion method.

In the figure, (14) is a support jack for supporting the side wall of the construction pit (5) from the inside, and (15) is for supporting and propelling the propulsion pipe (2) fed from the drum (6). A guide roller for guiding the machine (3).

The propulsion head (1) is, for example, a head main body (1A) having a small diameter of 50 to 70 mm, and a rotary excavation rotatably attached to the head main body (1A) around the longitudinal axis (P) on the tip side. Part (1B). And, in the excavation part (1B),
The tip of the pressure receiving surface (F) for receiving the earth pressure as the propulsion head (1) is propelled into the ground and biasing the propulsion head (1) in the direction of receiving the earth pressure. It is formed and provided on an inclined surface closer to the shaft center (P).

That is, when the propulsion head (1) is moved straight, it is propelled while rotating the excavation part (1B) with respect to the head body (1A), and when swiveling, the side opposite to the side to be swung in the radial direction. If the pressure receiving surface (F) is directed toward, the pressure receiving surface (F) receives earth pressure, and the propulsion direction of the propulsion head (1) is directed to the opposite side of the pressure receiving surface (F). The propulsion device (3) is provided with a holding part (17) for holding the propelling body (B), and a propulsion cylinder (18) for moving the holding part (17) in the propulsion direction, that is, back and forth is provided in the holding part (17). Provide the cylinder (1
The rod (16) of 8) is fixed to the machine base (25) in the front-rear direction, and the clamping portion (17) is installed by the cylinder (18) and the rod (16) so as to be movable back and forth.

As shown in FIGS. 1 to 4, the holding portion (17) is configured so that the propelling body (B) is detachably cooperated with the holding portion 4
Each wedge-shaped clamp claw (7) is installed inside the holding part main body (17A), and the clamp claw (7) is the shaft center (P) of the propulsion body (B).
A holding mechanism (9) that holds the clamp claw (7) and the clamp part main body (17A) so as to be movable in any direction and to prevent rolling around the shaft core (P) is provided between the clamp claw (7A) and the clamp part body (17A). The cam mechanism (8) for moving 7) in the clamping direction (that is, the radial direction) with respect to the propelling body (B) along with the movement operation in the axial center (P) direction is provided on the outer slope of each clamp claw (7). (F1) and the tapered inner surface (F2) of the holding portion main body (17A).

The clamp claw (7) has a wedge member (7A) whose thickness gradually changes in the direction of the axis (P) and a first dovetail groove (10) formed inside the holding portion main body (17A) so that the clamp claw (7) can be easily manufactured. ) And the engaging ridges (7B) that are engaged with
The engaging protrusion (7B) and the wedge member (7A) are integrally connected by a bolt (11).

Then, the first dovetail groove (10) is arranged such that its longitudinal direction is along the axial core (P) direction, and the first dovetail groove (10) and the engaging projection (7B) are provided with the axial core (P). The holding mechanism (9) is configured to be movably engaged in the direction.

In addition, the engaging projection (7B) held by the holding mechanism (9)
Is connected by a bolt (11) with a part of it (7b) fitted in a groove (12) formed on the outer surface of the wedge member (7A), and propelled based on the rotary operation of the rotary excavator (1B). The rotational reaction force acting on the body (B) is prevented from acting on the bolt (11) through the wedge member (7A) and being sheared and broken.

Provided is a fluid pressure cylinder (13) for moving the clamp claw (7) in the direction of the shaft core (P) to change the position between an operating position for clamping the propelling body (B) and a non-operating position for releasing the clamp. The cylinder chamber (S) of the double-acting fluid pressure cylinder (13) is formed in a ring shape along the circumferential direction of the propulsion body (B) and is provided in the holding portion main body (17A).

The piston member (13A) of the fluid pressure cylinder (13)
As shown in FIGS. 2 and 4, the connection structure between the clamp claw (7) and the clamp claw (7) has a second dovetail groove () extending in the radial direction of the propulsion body (B) at the base end of the clamp claw (7). The piston member (13A) is provided with a protrusion (20) that forms a groove (19) and engages with the second dovetail groove (19), and the clamp claw (7) is provided on the protrusion (20). , Is allowed to move in the radial direction of the propulsion body (B).

The clamping length (L) of the clamp claw (7) in the axial center (P) direction is longer than the length (l) of one propulsion pipe (2), and the propulsion pipe (2) to be clamped. The length is set so as to straddle the adjacent propulsion pipes, and the plural propulsion pipes (2) are sandwiched at the same time so that they can be propelled in a stable posture.

The head (1) is formed to have a diameter larger than that of the propulsion pipe (2), and the holding portion (17) holds the head (1) in a first holding state (FIG. 1 (a)), and propels it. The holding state can be freely changed to the second holding state (FIG. 1B) for holding the tube (2).

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of a propulsion method for propulsion method according to the present invention,
FIG. 1 (a) is a cross-sectional view of a holding portion holding the head,
Figure (b) is a cross-sectional view of the sandwiching portion sandwiching the propulsion pipe, FIG. 2 is a detailed cross-sectional view of the sandwiching portion, FIG. 3 is a vertical sectional front view of the sandwiching portion, and FIG. FIG. 5 is a side view of the propulsion device. (1) …… Propulsion head, (2) …… Propulsion tube, (17)…
… Clamping part, (B) …… Propulsion body. (L) ... Clamping length.

Claims (1)

[Claims] 1. A propulsion head (1) and this head (1)
A propulsion device (B) for propelling and operating a propulsion body (B) consisting of a propulsion pipe (2) flexibly connected to a holding part (17) for holding the propulsion body (B), Holding length (L) of the holding portion (17) with respect to the propulsion body (B)
Is set to a length across the propulsion pipe (2) to be held and the propulsion pipe (2) adjacent to the propulsion pipe (2).