JPH03119287A - Propeller for propelling construction - Google Patents

Abstract

PURPOSE:To stabilize the propelling operation of the whole propelling body efficiently and improve the efficiency of work by setting the retaining length of a retaining section for retaining the propelling body, to a length across a propeller pipe to be retained and a propeller pipe adjacent to the former propeller pipe. CONSTITUTION:A retaining section 17 for retaining a propelling body B consisting of a propelling head 1 and a propeller pipe 2 connected bendably to the head 1, is set. Then, the retaining length L of the retaining section 17 to the propelling body B is set to a length across the propeller pipe 2 to be retained and the propeller pipe 2 adjacent to the former propeller pipe 2. As a result, the propelling direction of the whole propelling body B is easily set, and a pushing force with a propeller can be efficiently transmitted to the front propeller pipe 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a propulsion machine for a propulsion construction method that propels and operates a propulsion body consisting of a propulsion head and a propulsion tube bendably connected to the head.

[Conventional technology]

Conventionally, a contact portion that contacts the rear end of the propelling body is provided, and the propelling body can be propelled via this contact portion.

[Problem to be solved by the invention]

However, when the propellant is propelled by abutting the rear end portion of the propellant through the abutting portion, the posture of the propellant becomes unstable and there is a risk that the direction of propulsion of the propellant may be deviated.

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

[Means to solve the problem]

The characteristic structure of the propulsion machine for the propulsion method of the present invention is that a clamping part that clamps the propelling body is provided, and the clamping length of the clamping part with respect to the propelling body is set to the propulsion pipe to be clamped and the propulsion pipe adjacent thereto. This is due to the fact that it is set to a straddling length,
Its effects are as follows.

[For production]

In other words, by holding the propelling body between the clamping parts and pushing it into the soil, the propelling body can be propelled in a more stable posture compared to pushing the rear end of the propellant. Since it is held across not only the propulsion tube but also the propulsion tube adjacent to it, it is easy to determine the propulsion direction of the entire propulsion body, and the pushing force from the propulsion device is efficiently transmitted to the propulsion tube in front.

〔Effect of the invention〕

Therefore, the propulsion body can be propelled while being held in the correct posture, and the propulsion operation of the entire propulsion body can be carried out efficiently and stably, making it possible to improve work efficiency.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 5, a plurality of rigid short pipe sections (2
A) A propulsion tube (2) formed of a (length approximately 70 to 300 mm) and a plurality of bendable flexible portions (2B) interposed separately between the plurality of rigid short tube portions (2A). Before propelling underground, a plurality of rigid short pipe parts (2A) and flexible parts (
2B) are connected to each other, and in order to press the propulsion tube (2), press the propulsion tube (2) while holding it so as not to bend it. ) In order to propel the propellant (B), which consists of a propulsion head (1) connected to a
A propulsion device (3) is provided to push the propellant (B) into the ground, and a plurality of rigid short pipe sections (2^) are arranged near the point where the propellant (B) is to be penetrated into the ground, with their axes aligned almost in a straight line. A pushing device (A) is provided by providing a guide member (4) that guides the pipe into the ground while maintaining the condition, and a winding of the propulsion pipe (2) is provided outside the upper part of the construction pit (5). A mounting drum (6) is installed to constitute 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 propels the propulsion pipe (2) paid out from the drum (6). This is a guide roller that guides the machine (3).

The propulsion head (1) has a head main body (IA) with a small diameter of, for example, 50 to 70 mm, and a rotary excavator that is attached to the tip side of the head main body (IA) so as to be rotatable about the front and rear axis (P). (IB). The excavation part (IB) receives earth pressure as the propulsion head (1) is propelled underground, and the propulsion direction of the propulsion head (1) is biased in the direction in which the upper pressure is received. Pressure receiving surface (F) for
The distal end side is formed on an inclined surface close to the axis (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 the propeller is propelled with the pressure receiving surface (F) facing the pressure receiving surface (F), the pressure receiving surface (P) will receive earth pressure and the propulsion direction of the propulsion head (1) will be directed to the opposite side to the pressure receiving surface (F). The propulsion device (3) is provided with a clamping part (17) that clamps the propellant (B), and a propulsion cylinder (18) for moving the clamping part (17) in the propulsion direction, that is, back and forth, is provided in the clamping part (17). The rond (16) of the cylinder (18) is fixed to the machine base (25) at the front and back, and the clamping part (17) is installed to be movable back and forth between the cylinder (18) and the rond (16). There is.

As shown in FIGS. 1 to 4, the holding portion (17)
, four model clamp claws (7) that cooperate to clamp the propellant (B) in a detachable manner are attached to the clamping part body (17A).
), and the clamp claw (7) is attached to the axis of the propellant (B) (
A holding mechanism (9) that is movable in the P) direction and non-rollable around the axis (P) is held by a clamp claw (7).
) and the clamping part main body (17A), and as the clamp claw (7) is moved in the axis (P) direction, the clamping claw (7) is moved in the clamping direction (i.e., radial direction) with respect to the propellant (B). The moving cam mechanism (8) is composed of an outer slope (Fl) of each clamp claw (7) and a tapered inner surface (F2) of the holding part main body (17A).

The clamp claw (7) has a shaft center (
A wedge member (78) whose thickness gradually changes in the P) direction and an engaging protrusion (7B) that engages with the first dovetail groove (10) formed on the inside of the holding part main body (17A), respectively. The engaging protrusion (7B) and the wedge member (7A) are made up of bolts (
11).

Then, the first dovetail groove (10) is arranged so that its longitudinal direction is along the axis (P) direction, and the first dovetail groove (10) and the engagement protrusion (7B) are aligned with the axis (P). The holding mechanism (9) is constituted by engaging the holding mechanism (9) so as to be movable in the direction.

Further, the engagement protrusion (7B) held by the holding mechanism (9)
) is connected with the pole (11) with its part (7b) fitted into the groove (12) formed on the outer surface of the wedge member (7A), and is connected to the rotating operation of the rotary excavation part (IB). The rotational reaction force acting on the base propellant (B) is prevented from acting on the pole (11) through the wedge member (7A) and causing shear failure.

A fluid pressure cylinder that moves the clamp claw (7) in the direction of the axis (P) to change the position between an active position where the propelling body (B) is clamped and a non-active position where the clamp is released.
13), and the cylinder chamber (S) of the double-acting fluid pressure cylinder (13) is formed into a ring shape along the circumferential direction of the propellant (B), and is provided in the holding part main body (17A). .

Note that the piston member (13) of the fluid pressure cylinder (13)
As shown in FIGS. 2 and 4, the connection structure between A) and the clamp claw (7) includes a second dovetail at the base end of the clamp claw (7) along the radial direction of the propelling body (B). A groove (19) is formed, and the piston member (13A) is provided with a protrusion (20) that engages with the second dovetail groove (19). ) is allowed to move in the radial direction of the propellant (B).

The clamping length (L) of the clamp claw (7) in the axis (P) direction is longer than the length (1) of one propulsion tube (2), and the length (L) of the clamping claw (7) is longer than the length (1) of one propulsion tube (2). It is set to a length that spans adjacent propulsion tubes (2), and is formed so that a plurality of propulsion tubes (2) can be simultaneously held and propelled in a stable posture.

The head (1) is formed to have a larger diameter than the propulsion tube (2), and the holding part (17) is a first part that holds the head (l).
The clamping state can be freely changed between a clamping state (FIG. 1(A)) and a second clamping state (FIG. 1(II)) in which the propulsion tube (2) is clamped.

[Brief explanation of drawings]

The drawings show an embodiment of the propulsion device for the propulsion method according to the present invention,
Figure 1 (a) is a sectional view of the holding part that holds the head;
Figure (+7) is a sectional view of the clamping part that clamps the propulsion tube, Figure 2 is a detailed sectional view of the clamping part, Figure 3 is a longitudinal sectional front view of the clamping part,
FIG. 4 is a cross-sectional view of the main part, and FIG. 5 is a side view of the propulsion device. (1) Propulsion head, (2) Propulsion head
Propulsion tube, (17)... clamping part, (B) old...
propellant. (L)...Pinch length.

Claims (1)

[Claims] A propulsion machine for a propulsion construction method that propels and operates a propulsion body (B) consisting of a propulsion head (1) and a propulsion tube (2) bendably connected to the head (1), wherein the propulsion body (2) )
A clamping part (17) is provided to clamp the propulsion pipe (2) to be clamped and the propulsion pipe (
2) The propulsion machine for the propulsion method is set to a length that spans.