JPH03119285A - Propelling construction device - Google Patents

Abstract

PURPOSE:To improve propelling performance and enable the whole device to be miniaturized and energy to be saved by forming the diameter of a propelling head to be larger than the diameter of a propeller pipe, and by enabling the head and the propeller pipe to be retained to be switched to each other with a retaining section set at a propeller. CONSTITUTION:The diameter of a propelling head 1 is formed to be larger than that of a propeller pipe 2, and a propeller 3 is provided with a retaining section 17 for supporting a propelling body B in a state that it is inserted through the section 17. The retaining section 17 is composed so that a first retaining state for retaining the head 1 and a second retaining state for retaining the propeller pipe 2 may be switched to each other. After a device is propelled under ground with the head of the larger diameter in the first retaining state, the state is switched to the second retaining state and the propeller pipe 2 of the smaller diameter is propelled in the state of low sliding contact resistance to soil. As a result, the propelling body B can be certainly propelled with a low propelled force and in the fixed direction.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a propulsion body consisting of a propulsion head and a propulsion tube connected to the head, and a propulsion machine that propels and operates the propulsion body. Regarding propulsion method equipment.

[Conventional technology]

In conventional propulsion method devices, the head and the propulsion tube are formed to have the same diameter, a contact part that contacts the rear end of the propellant is provided on the propulsion machine, and the propellant is operated through the contact part. It was configured to be possible.

[Problem to be solved by the invention]

However, as the propulsion unit is pushed into the soil by the propulsion machine, the sliding resistance with the soil acts not only on the head of the propulsion unit but also on each of the propulsion tubes, resulting in a large propulsion force. In addition, the propulsion body, whose rear end is pushed by the abutting portion, has an unstable posture and has the disadvantage that it is difficult to maintain a constant propulsion direction.

An object of the present invention is to reduce the sliding resistance of the propellant to the soil, and to make it easier to propel the propellant in a stable posture.

[Means to solve the problem]

The characteristic configuration of the propulsion method device of the present invention is that the head is formed to have a larger diameter than the propulsion tube, and the propulsion device is provided with a clamping part that clamps the propelling body in a state where it is inserted, and the clamping part is used to hold the head. It is configured to be switchable between a first clamping state in which the propulsion tube is clamped and a second clamping state in which the propulsion tube is clamped, and its effects are as follows.

[For production]

In other words, the propulsion head on the tip side is lower than the following propulsion tube.
Since the diameter of the head is also large, as the propellant is propelled into the soil, the small-diameter propulsion tube propels the head while making a hole in the soil with less sliding resistance. Since both the head and the propulsion tube can be held by the clamping part and pushed into the soil, the propulsion posture of the entire propellant can be changed compared to pushing the rear end of the propellant. Propulsion can be operated in a stable state.

〔Effect of the invention〕

Therefore, it is possible to reliably propel the propelling body in a constant propulsion direction with a smaller propulsive force, and it has become possible to improve the propulsion performance and to reduce the overall size and labor.

〔Example〕

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

As shown in FIGS. 2 and 5, a plurality of rigid short pipe sections (2
A) A propulsion tube (2) formed of a (length approximately 70 to 300 u) and a plurality of bendable flexible portions (2B) interposed separately between the plurality of rigid short tube portions (2A). Before propelling it underground, a plurality of rigid short pipe parts (2A) and flexible parts (2A) are prepared in advance.
B) 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. ) A propulsion device (3) is provided to push the propellant (B) underground into the construction pit (5) in order to propel the propellant (B) consisting of a propulsion head (1) connected to a Along with the propellant (
B) A plurality of short rigid pipe sections (
A pushing device (A) is formed by providing a guide member (4) that guides the material (2A) into the ground while keeping its respective axes aligned in a substantially straight line, and for,
A winding drum (6) for winding up the propulsion tube (2) is installed to constitute a propulsion method device.

In addition, as shown in FIG. 1<4), (0), the head (1) is formed to have a larger diameter than the propulsion tube (2),
2) reduces the sliding resistance received from the soil.

In the figure, (14) is a support jack that supports the side wall of the construction pin (5) from the inside, and (15) is a drum (
The propulsion machine (
3) It is a guide roller that guides the user.

The propulsion head (1) includes a head main body (IA) with a small diameter of, for example, 50 to 70 cranes, and a rotary excavator (IA) that is attached to the tip side of the head main body (IA) so as to be rotatable around the front and rear axis with respect to the head main body (IA). IB). And the excavation part (IB)
As the propulsion head (1) is propelled underground, it receives earth pressure, and the propulsion head (1) moves in the direction in which it receives the upper pressure.
A pressure receiving surface (F) for biasing the direction of propulsion of the shaft (F) is provided on the tip side by forming 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 (F) 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). As shown in FIGS. 1 to 4, the propulsion device (3) is provided with a clamping part (17) that clamps the propelling body (B).
) is moved in the propulsion direction, that is, back and forth.
8) is provided on the clamping part (17), and the rond (16) of the cylinder (18) is fixed to the machine base (25) at the front and back, and the cylinder (18) and the rond (16) are used to move the clamping part (17) back and forth. It is installed and configured so that it can be moved and operated.

The clamping part (17) is constructed by incorporating four model clamp claws (7) in the clamping part main body (17A), which work together to clamp the propelling body (B) in a detachable manner. A holding mechanism (9) that holds (7) movably in the direction of the axis (P) of the propellant (B) and unable to roll around the axis (P).
), respectively of the clamp claw (7) and the holding part body (17A).
As the clamp claw (7) is moved in the direction of the axis (P), the head (1) is clamped between the first clamping state (FIG. 1 (a)) and the head ( 1) A cam mechanism (that is, a cam mechanism that moves in the clamping direction (i.e., radial direction) with respect to the propellant (B) so as to be able to switch to a second clamping state (FIG. 1 (O)) in which the propulsion tube (2) with a smaller diameter is clamped. 8), the outer slope (Fl) of each clamp claw (7) and the clamping part body (17A)
and a tapered inner surface (F2).

The clamp claw (7) has a shaft center (
A wedge member (7A) whose thickness gradually changes in the P) direction and an engaging protrusion (7B) that engages with the first dovetail groove (10) formed inside the holding part main body (17A) are separate members, respectively. The engaging protrusion (7B) and the wedge member (7^) are connected to the bolt (
11).

Then, the first dovetail groove (10) is arranged so that its elongated 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)
) (11) with a part (7b) fitted into the recess 1 (12) formed on the outer surface of the wedge member (7A).
The rotary reaction force acting on the propelling body (B) based on the rotational operation of the rotary excavation part (IB) acts on the bolt (11) through the wedge member (7A), and prevents it from being sheared and fractured. It has been prevented.

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 pipe (S) of the double-acting fluid pressure cylinder (13) is formed into a ring shape along the circumferential direction of the propelling body (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 Fig. 4, the connection structure between A) and the clamp claw (7) includes a second dovetail groove (19) along the radial direction of the propelling body (B) at the base end of the clamp claw (7). , and the protrusion (20) that engages with the second dovetail groove (19) is connected to the piston member (13).
A), and allows the clamp claw (7) to move in the radial direction of the propelling body (B) with respect to the protrusion (20).

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

[Another example]

Instead of providing a plurality of clamp claws (7), the clamping part (17) may be provided with one clamp member and the propelling body (B) can be clamped by the clamp member, and various clamping structures can be used. Can be changed.

The propulsion head (1) has the rotary excavation part (
Instead of providing the IB), a rotating force for excavation may be provided.

[Brief explanation of drawings]

The drawings show an embodiment of the propulsion method device according to the present invention.
Figures (A) and (0) are longitudinal sectional side views of main parts showing the propulsion head and propulsion tube in a clamped state, Figure 2 is a longitudinal side view of the clamping part, Figure 3 is a vertical front view of the clamping part, and Figure 4 is a vertical sectional side view of the clamping part. The figure is a cross-sectional plan view of the main part, and FIG. 5 is an overall side view. (1)...Head, (2)...Propulsion tube, (3)...Propulsion device, (17)...Gripping part, (B)・・・・・・Propellant.

Claims (1)

[Claims] A propulsion body (B) consisting of a propulsion head (1) and a propulsion tube (2) connected to the head (1) is provided, and a propulsion device (3) for propelling and operating the propulsion body (B) is provided. A propulsion method device, wherein the head (1) is connected to the propulsion pipe (2).
The propulsion unit (3) is provided with a holding part (17) which is formed to have a larger diameter than the head (1) and which holds the propelling body (B) in a state where it is inserted therethrough. ) and a second clamping state in which the propulsion pipe (2) is clamped.