JPH0754399Y2 - Structure of the connecting part of the propulsion body for the propulsion method - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a structure of a connecting portion of a propulsion body for a propulsion method, and more specifically, propulsion for propelling a propulsion device having a plurality of propulsion bodies connected to the ground. TECHNICAL FIELD The present invention relates to a structure of a propulsion body connecting portion of a propulsion device used in a construction method.

[Conventional technology]

In the propulsion device, it is preferable that the propulsion device is capable of switching between a first state in which a bending posture of a connecting portion of an adjacent propulsion body is allowed and a second state in which the bending posture is prohibited and a straight posture is maintained. .

This is because it is preferable to use the connecting portion in the first state when propelling the propelling body device into the ground, for example, while the connecting part is used when the propelling body device is wound and stored on a winding drum. This is because it is preferable to use the part as the second state.

Therefore, the inventors of the present invention, as shown in FIG. 5, set the first state in which the bending posture of the connecting portion (J) connecting the adjacent propulsion bodies (B) and (B) is allowed and the bending posture thereof. An end portion (B ₁ ) of one of the two propelling bodies (B), (B) is used as a switching means (K) for switching between the prohibition and the second state in which the propulsion body is held in the straight posture. A stopper (8) that contacts the above-mentioned second state and causes the second state to appear, and retracts from the end (B ₁ ) to reveal the first state in the propulsion body axis (P) direction. The other of the two propulsion bodies (B) and (B) has a space portion (S) that is movably provided and that allows the stopper (8) to retract when the second state is switched to the first state. The structure of the connecting portion of the propulsion unit provided at the end (B ₂ ) of the propulsion unit (B) was first developed.

Incidentally, in the connecting portion structure shown in FIG. 5, the following means is adopted as the means for maintaining the second state. That is, an uneven portion having an uneven shape in the direction of the propulsion body axis (P) is formed at the end portion (B ₂ ) of the other propelling body (B), and the concave portion serves as the space portion (S). While functioning, the stopper (8) was formed with a bulging portion (8a) that partially extends toward the end portion (B ₂ ) side and is partially widened to reach the second state. The stopper (8) is rotated around the axis of the propellant body (P) so that the protruding portion (8a) is brought into contact with and held by the convex portion of the uneven portion at the end portion (B ₂ ). It has become. However, it is also conceivable to hold it by using other means such as a lock member that locks the stopper (8) with respect to the other propelling body (B) so that the stopper (8) can be engaged and disengaged.

[Problems to be solved by the device]

The structure of such a connecting portion of the propulsion body also has the following problems to be improved.

That is, when the second state is realized by using the stopper (8) and the state is maintained, the space portion (S) is opened to the outside, and thus the opened space portion (S) is opened.
Foreign matter such as earth and sand will get in from the outside. And
If foreign matter such as earth and sand gets into the open space (S) and becomes clogged, unless the foreign matter is removed,
The stopper (8) cannot be retracted into the space (S) and cannot be returned to the first state, and the workability at the time of switching from the second state to the first state deteriorates. There is a problem.

The present invention was created with attention paid to such circumstances.
It is an object of the present invention to provide means capable of solving the above problems.

[Means for Solving the Problems]

The characteristic structure of the connecting portion structure of the propulsion body for the propulsion method according to the present invention is that the end portion of the propulsion body in which the space portion is provided is covered with a covering portion that covers the space portion from the outside. Is formed in a state in which the above is allowed, and its action and effect are as follows.

[Action]

In such a structure of the connecting portion of the propelling body, since the covering portion that covers the space portion from the outside is formed at the end portion of the propelling body in which the space portion is provided, the presence of the covering portion causes the first portion The space is shielded from the outside when the two states are realized. Therefore, it is possible to prevent foreign matter such as earth and sand from entering the space from the outside.

[Effect of device]

Therefore, foreign matters such as earth and sand enter the space and are clogged, and the above-mentioned problem of workability caused by it is solved.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

The plurality of propelling bodies (B) ... According to the present invention, as shown in FIG. 4, comprises a combination of a propulsion head (1) and a plurality of propulsion pipes (2). It is connected in advance through.

The propelling body (B) is propelled into the soil by the propulsion device, and the propulsion device is configured as described in detail below.

That is, the propelling pipes (2) are pushed into the construction pit (5) while holding and pushing the propelling pipes (2) so that the propulsion head (1) connected to the tip of the propelling pipes (2) is propelled into the soil. A propulsion head (1) for pushing into the soil and a pressing device (3) for propulsion are provided, and their respective axial cores are arranged in a substantially straight line near a place where a plurality of propulsion pipes (2) ... A guide member (4) that guides into the soil while maintaining the state is provided. A winding drum (6) for winding and housing the propulsion pipes (2) ... Is provided outside the upper part of the construction pit (5). Incidentally, (14) in the figure is a support jack for supporting the side wall of the construction pit (5) from the inside so as not to collapse, and (15) in the figure is fed from the winding drum (6). Supporting the propelling body (B) ...
It is a guide roller that guides to 7).

The propulsion head (1) has, for example, a head body (1A) having a small diameter of 50 to 70 mm, and a propulsion body axis (P) (for propulsion) having the same diameter as the head body (1A) with respect to the head body (1A). The excavation part (1B) is attached to the tip side so as to be rotatable around the head axis (P).

The excavation part (1B) receives earth pressure as the propulsion head (1) is propelled in the soil, and the propulsion head (1) is biased toward the direction in which the earth pressure is received. The pressure receiving surface (F) is formed on an inclined surface closer to the shaft core (P) toward the tip end side. When the propelling head (1) is moved straight, the excavation portion (1B) is propelled while rotating with respect to the head body (1A), while when the propelling head (1) is swung, the pressure receiving surface is provided on the side opposite to the side to be swung. (F) is propelled toward the pressure receiving surface (F), and the thrust of the head (1) is the pressure receiving surface (F).
And will be turned to the other side.

A connecting portion (J) between adjacent members of the propelling body (B),
That is, the connecting part (J) between the propulsion head (1) and the propulsion pipe (2) and the connecting part (J) between the adjacent propulsion pipes (2) are described in detail below. It is configured (see FIGS. 1 to 3).

That is, on the inner surface of the joint mounting portion (B ₄ ) formed at the end portion (B ₂ ) of the propulsion body (B) on the rear side (the left side corresponds to the rear side in FIGS. 1 to 3), The member (12) is screwed and fixed, and the joint member (12) is attached to the end (B ₁ ) of the propulsion body (B) adjacent to the front of the propulsion body (B) and the propulsion body axis (P).
Fitting receiving part (13) for swinging in the direction orthogonal to
Has been formed. The joint member (12) is a propelling body (B).
The shaft portion (12a) formed in the rear portion and the spherical joint portion (12b) formed in the front portion of the shaft portion (12a) are provided in a posture along the longitudinal direction of the
Consists of. The shaft portion (12a) is screwed and fixed to the front portion of the rear propulsion body (B), and the spherical joint portion (12).
The b) is swingably fitted in a fitting receiving portion (13) provided at the rear portion of the forward propulsion body (B).

Adjacent propelling bodies (B), (B) are provided in the connecting portion (J).
1st which allows the bending posture of the connection part (J) which connects mutually
Switching means (K) is provided for switching between the state and the second state in which the bent posture is prohibited and the straight posture is maintained.

Specifically, the switching means (K) has a ring shape having a bulging portion (8a) that comes into contact with the end portion (B ₁ ) of the forward propulsion body (B) to realize the second state. It comprises a stopper (8). In the present embodiment, the strut portion (8a) is adapted to Setto to end (B ₂₎ of said rear propellant in the second state (B).

The rear end face of the stopper (8) is in a concavo-convex state, and a portion corresponding to the convex portion is widened to form the bulging portion (8a). The stopper (8) is fitted onto the outer surface of the joint mounting portion (B ₄ ) via a bush (21) functioning as a slide member and a sliding bearing, and the presence of the bush (21) Sliding in the propulsion body axis (P) direction and rotating around the propulsion body axis (P) are performed smoothly. The bush (21) is a slide bearing made of, for example, a sintered alloy or Teflon. Further, the space portion (S) that allows the withdrawal portion (8a) of the stopper (8) to retract from the end portion (B ₁ ) is a front end portion (B ₂ ) of the rear propulsion body (B). ) Is formed.

According to such a stopper (8), the protrusion (8a) is appropriately rotated around the propelling body axis (P) so that the protruding portion (8a) is the end portion (B ₁ ) of the adjoining propelling bodies (B), (B). ), (B ₂ )
The second state is realized by abutting against each other and stretching the connecting portions (J) of the two propelling bodies (B) and (B) so as not to assume a bending posture, while the second state is realized again. By appropriately rotating the shaft (P) and then retracting the strut (8a) into the space (S), the connecting portion (J) of the two propulsion bodies (B), (B). The first state can be realized by allowing the person to assume a bent posture.

By the way, at the end (B ₂ ) of the rear propulsion body (B) provided with the space portion (S), a covering portion (B ₃ ) for covering the space portion (S) is formed. More specifically, at the end (B ₂ ) of the rear propulsion body (B),
A ring-shaped covering portion (B ₃ ) having an inner diameter larger than the outer diameter of the stopper (8) and an outer diameter substantially equal to the outer diameter of the propelling body is extended from the propelling body, and the covering ( The space (S) is surrounded by B ₃ ) and covered from the outside. The covering portion (B ₃ ) is such that the end portion (B ₂ ) of the rearward propelling body (B) also covers the end face that contacts the stopper (8) in the second state. It is extended from the main body. Further, a seal member (22) is provided at a sliding contact portion between the covering portion (B ₃ ) and the stopper (8), and the presence of the seal member (22) prevents intrusion of earth and sand or the like. It is supposed to be done.

Thus, when the connecting portion (J) of the propulsion body (B) is configured, the space portion (S) is provided at the end portion (B ₂ ) of the propulsion body (B) provided with the space portion (S). Since the covering portion (B ₃ ) is formed, the existence of the covering portion (B ₃ ) causes
The space portion (S) in a state where the second state is realized
The open state of will be shielded. Therefore, foreign matter such as earth and sand can be prevented from entering from the outside at that portion.

In the present embodiment, the covering portion (B ₃ ) is the second portion.
In the state, the abutting end face in the second state is extended because it extends from the propelling body so as to cover the abutting end face abutting the end portion (B ₂ ) of the rearward propelling body (B). Since it is shielded from the outside, foreign matter such as earth and sand can be prevented from entering from that portion as well.

In addition, not all the connecting portions (J) connecting the adjacent propulsion bodies (B) and (B) have the above-described configuration,
A part of the connecting portion (J) is elastically deformable between the end portions (B ₁ ) and (B ₂ ) of both propelling bodies (B) and (B), and is elastically deformable.
0) (see FIG. 1) is press-fitted, and even if it is the connecting portion (J) in which the bending posture of the connecting portion (J) is allowed by its elastic deformability, The present invention can be applied to the connecting portion (J) excluding the portion (J).

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 structure of the accompanying drawings by the entry.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 4 show an embodiment of a connecting portion structure of a propulsion body for a propulsion method according to the present invention. FIG. 1 is a longitudinal sectional view thereof, and FIG.
1 is a cross-sectional view taken along the line II-II in FIG. 1, FIG. 3 is an exploded perspective view of a main part thereof, and FIG. 4 is a side view of a propulsion device including the propulsion body. FIG. 5 is a vertical sectional view of a structure of a connecting portion of a conventional propulsion body for a propulsion method. (8) …… Stopper, (B) …… Propulsion body, (B ₁ ) ……
One propulsion body end, (B ₂ ) ... the other propulsion body end,
(B ₃ ) …… Coating part, (K) …… Switching means, (J) ……
Connection part, (P) ... propulsion body axis, (S) ... space part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaya Hattori 1-1-1 Hama, Amagasaki-shi, Hyogo Inside Kubota Technology Development Laboratory Co., Ltd. (72) Inventor Yukio Imada 1-1-1 Hama, Amagasaki-shi, Hyogo Stock Company Kubota Technology Development Laboratory

Claims (1)

[Scope of utility model registration request] 1. A first allowing a bending posture of a connecting portion (J) for connecting adjacent propelling bodies (B) and (B) to each other in a bendable manner.
One of the two propulsion bodies (B), (B) is a propulsion body (B) as a switching means (K) for switching between the state and the second state in which the bent posture is prohibited and the straight state is maintained. The stopper (8) that abuts on the end (B ₁ ) of the shaft to expose the second state and retracts from the end (B ₁ ) to expose the first state. Both of the propulsion bodies (B) are provided with a space (S) slidably provided in the direction of the core (P) and permitting the stopper (8) to be retracted when the second state is switched to the first state. The structure of the connecting portion of the propulsion body for the propulsion method provided at the end portion (B ₂ ) of the other propulsion body (B), in which the space portion (S) is provided (B) the end of the (B ₂₎ is), in a state covering part covering the space portion (S) from the outside is (B _3), which allows the sliding of the stopper (8) Coupling part structure of jacking method propulsion body being made.