JPH053399U - Propulsion device - Google Patents

Abstract

(57) [Summary] [Purpose] To be able to propel a propulsion unit device in which adjacent ones of a plurality of propulsion units are flexibly connected to each other into the soil with a small propulsion force. [Structure] An outer cylindrical body 6 which is fitted to each other at least part of a plurality of propelling bodies 3 and is expandable / contractible in the axial direction of the propelling body 3.
And an inner cylinder body 5, and a fluid pressure cylinder portion 7 and a piston portion 8 for expanding and contracting them are formed between the both cylinder bodies 5, 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a propulsion device that is pushed from the ground and propelled into the soil, and more particularly to a propulsion device in which a plurality of adjacent propulsion devices are flexibly connected to each other.

[0002]

[Prior Art]

 As a propulsion device in which adjacent ones of a plurality of propulsion devices are flexibly connected to each other, conventionally, each of the propulsion devices constituting the propulsion device is formed of one rigid cylindrical body. The propulsive force can be transmitted from the propulsion side to the lower side through the propulsion body, and the equipment for supplying the propulsion force pushes the ground-based propulsion body device into the soil to Was being promoted into the soil at the same time.

[0003]

[Problems to be solved by the device]

 However, when propelling a conventional propulsion unit into the soil, the longer the propulsion unit that is propelled into the soil, the more the entire propulsion unit from the ground is simultaneously propelled into the soil. There is a problem that the propulsion resistance of the equipment in the soil becomes large and the propulsion force from the ground must be large. In addition, as the propulsion force increases, the axial compressive force applied to the propulsion device also increases, which makes it easier for the parts between the flexibly connected propulsion units to buckle. The posture directions of the propulsion bodies of the propulsion units are separated from each other, and it becomes difficult to transmit the propulsion force from the propulsion side to the propulsion side.Therefore, the propulsion unit must be pushed into the soil with a larger propulsion force from the ground. There is a possibility that the buckling state between the propulsion units may be advanced with the propulsion of the propulsion unit, causing the propulsion unit to meander and deviating from the predetermined propulsion path. The present invention has been made in view of the above circumstances, and an object thereof is to provide a propulsion device capable of propelling into the soil with a small propulsive force.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, a plurality of propelling bodies adjacent to each other are flexibly connected to each other, and the characteristic structure of the propelling body apparatus of the present invention is that at least a part of the plurality of propelling bodies is It is composed of an outer cylinder and an inner cylinder which are fitted to each other and can expand and contract in the axial direction of the propelling body, and a fluid pressure cylinder part and a piston part for expanding and contracting them are arranged between the two cylinders. It is in the point of being formed.

[0005]

[Action]

 That is, a propulsion body that is composed of an outer cylinder body and an inner cylinder body that are expandable and contractible in the axial direction, and in which a fluid pressure cylinder portion and a piston portion are formed between both cylinder bodies is used as a propulsion body that is less than a plurality of propulsion bodies in soil. By arranging them both in one part, if the pressure fluid is supplied between the fluid pressure cylinder part and the piston part, the inner cylinder of the propelling body will be axially oriented with respect to the outer cylinder forming a pair with it. The propelling body devices on both sides of the two cylinders and below in the propulsion direction are frictionally supported by the propulsion unit and the surrounding soil so as to prevent them from retracting to the propulsion side, while extending in the axial direction. Only the inner cylinder and the propelling body device on the lower side of the propulsion below the inner cylinder can be pushed forward. In the following, a plurality of propulsion units consisting of both cylinders are sequentially processed from the propulsion lower side to the propulsion lower side by the above procedure, so that a separate propulsion unit device on the propulsion lower side of the propulsion unit to be extended can be operated. Can be pushed to the side.

[0006]

[Effect of the device]

 Therefore, compared with the structure in which a driving machine such as an electric motor is used to extend and contract with both cylinders, for example, the present invention requires only the interior of the hydraulic pipe for feeding the fluid between the fluid pressure cylinder part and the piston part. Since the body can be driven to expand and contract, it can be formed into a relatively simple structure, and when propelling the device into the soil, it can be divided into multiple parts and can be separately propelled. Even if the device becomes long, it can be propelled in the soil with a small propulsion force. Moreover, since each propelling body can be propelled with a small propulsion force, the bendable portion between the propulsion bodies is less likely to buckle, and the increase in required propulsion force due to buckling can be suppressed, and the propulsion force can be reduced. It is possible to prevent the equipment to be supplied from becoming large in size, suppress deviation from the predetermined propulsion path due to buckling, and improve the thrust performance.

[0007]

【Example】

 Hereinafter, an embodiment of the propulsion device of the present invention will be described with reference to the drawings. FIG. 2 shows how the propulsion device M of the present invention is propelled into the soil by the propulsion equipment 2 provided in the shaft 1.

The propulsion equipment 2 holds and fixes the propulsion device M and pushes it into the soil with a predetermined stroke. The propulsion device M includes a plurality of propulsion devices 3 and a propulsion device at the head thereof. It is composed of a propulsion head 4 which is connected to 3 and can control the bending and cutting of the soil mass and the propulsion direction.

As shown in FIG. 1, the propulsion body 3 has its adjoining ones connected flexibly via a ball joint J, and is a propulsion body that follows the propulsion head 4 which is not only straight but also curved. The device M is adapted to be able to follow while bending. The propelling body 3 is composed of an inner cylinder body 5 and an outer cylinder body 6, and a fluid pressure cylinder portion 7 and a piston portion 8 for expanding and contracting the inner and outer cylinder bodies 5, 6 between them. Is formed.

The fluid pressure cylinder portion 7 is formed on a portion of the inner peripheral surface of the outer cylindrical body 6 having a step, with a slightly enlarged inner diameter. A propelling body device M has a communication passage 11 formed in the wall of the outer cylindrical body 6 for guiding the pressure oil fed from the outside through the pipe 9 and the elbow 10, and the piston portion 8 has an inner cylinder. The pressure oil, which is formed on the outer circumference of the body 5 and is guided to the fluid pressure cylinder portion 7 through the communication passage 11, presses the piston portion 8 to move the inner cylinder body 5 against the outer cylinder body 6. It can be extended along its axis.

Further, the piston portion 8 is formed as a ring member that extends around the entire circumference of the inner cylindrical body 5, and the pressure receiving surface 12 that receives the pressure oil sent from the communication path 11 is widened to increase the pushing force. Can be transmitted to the inner cylindrical body 5. Further, the fluid pressure cylinder portion 7 and the piston portion 8 are of a single-acting type, and the pressure oil can be removed by simply pushing the outer cylinder body 6 into the inner cylinder body 5 which is extended by being pressed by the pressure oil. It is possible to pass through the communication passage 11, the elbow 10 and the piping pipe 9 to advance the outer cylinder body 6 in the direction of contracting toward the inner cylinder body 5. The front end of the joint J is chamfered to form a notch 13, and the propulsion body 3 connected to the ball joint J is bent around the ball joint J as it bends. The piping pipe 9 and the elbow 10 are not damaged.

Further, the fluid pressure cylinder portion 7 shows a space formed between the outer peripheral surface of the inner cylindrical body 5 and the inner peripheral surface of the outer cylindrical body 6 having a slightly enlarged inner diameter, and The piston portion 8 indicates a protruding portion provided on the outer periphery of the inner cylindrical body 5.

The procedure for propelling the above-mentioned propellant device M in the soil will be described below. Pressure oil is sent to the propelling body 3 in the longitudinal direction of the propelling machine M in the soil through the pipe 9 and the nozzle 10. Then, the pressure oil sent to the cylinder portion 7 through the communication passage 11 presses the piston portion 8 fitted in the fluid pressure cylinder portion 7 to press the inner cylinder body 5 with respect to the outer cylinder body 6. Stretch out. At this time, since the propelling body 3 following the outer cylinder body 6 is frictionally supported by the earth pressure around the outer cylinder body 6, the outer cylinder body 6 does not retreat, and as shown in FIG. The cylindrical body 5 and the propulsion body 3 on the lower side of its propulsion are embedded in the soil. After that, the propulsion equipment 2 in the standing pile 1 embeds the remaining propelling body 3 on the propulsion side in the soil. By doing so, the entire propulsion unit apparatus M can be propelled in the soil, and a plurality of propulsion units 3 can be propelled by repeating the above procedure. In this case, the propulsion device M is divided into two parts, the propulsion device side and the propulsion device side, and the propulsion device device M is separately propelled, so that it can be performed with a smaller propulsion force than when the entire propulsion device device M is pushed all at once. In the above description, the expansion and contraction of the propulsion body 3 is performed only at one location in the soil under the propulsion body apparatus M, but the propulsion force is similarly applied to a plurality of locations, continuous locations, and the entire propulsion body apparatus M. It can be reduced. Further, when the inner cylinder body 5 is extended with respect to the outer cylinder body 6, the propulsion equipment 2 in the vertical pile 1 is used in addition to the above-described one in which the earth pressure of the propulsion body 3 following the outer cylinder body 6 is used. By holding the propulsion body 3 in between, the retreat can be suppressed.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view of the propulsion device of the present invention.

FIG. 2 is an overall side view showing a state in which the propulsion device of the present invention is propelled into the soil.

FIG. 3 is an overall side view showing a state where the propulsion device of the present invention is propelled into the soil.

[Explanation of symbols]

 3 Propulsion body 5 Inner cylinder 6 Outer cylinder 7 Fluid pressure cylinder 8 Piston

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Katsuhiko Mukin 1-1-1, Hama, Amagasaki City, Hyogo Prefecture Kubota Institute of Technology Development Co., Ltd. (72) Inventor Taka 1-1 Hama, Amagasaki City, Hyogo Co., Ltd. Kubota Technology Development Laboratory

Claims (1)

[Claims for utility model registration] Claims: 1. A propulsion device in which adjacent ones of a plurality of propulsion devices (3) are flexibly connected to each other.
At least a part of the plurality of propelling bodies (3) are fitted to each other, and an outer cylinder body (5) and an inner cylinder body (6) capable of expanding and contracting in the axial direction of the propelling body (3). And a fluid pressure cylinder portion (5b) and a piston portion (8) for expanding and contracting the two cylinders (5) and (6).