JP2813687B2 - Propulsion device for propulsion method - Google Patents

Description

The present invention relates to a propulsion device used in a propulsion method.

[Conventional technology]

Such a propulsion device is used not only when the propulsion body is linearly propelled in the soil but also when the propulsion body is propelled in a curve in the soil. Therefore, as a propulsion body device that can be used when the propulsion body is curvedly propelled in the soil, there is a propulsion body device that includes a plurality of connecting portions that connect adjacent propulsion bodies to bend freely. Specifically, in order to make the structure of the connection portion between the propulsion bodies adjacent to each other bendable, there is a type in which a gap that allows the bending is provided between opposing end faces of both propulsion bodies.

However, the gap is an effective space for securing the bending at the time of the construction of the propulsion method for propelling the propulsion body in a curved manner in the soil, but is liable to be clogged by foreign matter such as earth and sand entering the space. If clogging occurs, it also becomes a space that creates a disadvantage that the bending becomes difficult.

Then, the present inventors press-fit an elastically deformable seal member between opposing end faces of the two propulsion bodies adjacent to each other, and make the bending possible by the elastic deformability of the seal member, and at the same time, A propulsion device having a simple structure for preventing the inconvenience caused by preventing the intrusion of foreign matters such as earth and sand by its existence has been previously developed.

[Problems to be solved by the invention]

However, the propulsion device developed by the present inventors has problems to be improved as described below.

That is, in the case where the propulsion device is wound up and stored in a winding drum, the degree of bending of the structure of the connecting portion is insufficient, and the propulsion device cannot be wound up and stored compactly. There are problems that need to be improved. Therefore, it is conceivable to increase the number of the flexible connecting portions, but if the number is simply increased, this time,
When the propelling body is propelled linearly in the soil, a problem arises in that smooth propulsion cannot be performed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and can prevent a problem that the inconvenience occurs by preventing intrusion of foreign matter such as earth and sand into the gap, and at the same time, winds and stores a propulsion body on a winding drum. It is an object of the present invention to provide a propulsion device having a simple structure that can be wound up and stored compactly even in a case, and that can smoothly propell even when the propulsion body is linearly propelled in the soil. .

[Means for solving the problem]

The characteristic configuration of the propulsion device for a propulsion method according to the present invention is as follows. A part of the plurality of connecting portions is formed by press-fitting an elastically deformable seal member between opposing end surfaces of the adjacent two propulsion members. A switch configured to include one connecting portion and to switch the remaining portions of the plurality of connecting portions between a first state in which the bending posture of the connecting portion is allowed and a second state in which the bending posture is prohibited and held in a straight posture. Second with means
The operation and effect are as follows.

(Operation)

In the propulsion device for a propulsion method, the presence of the elastically deformable seal member press-fitted between the opposed end surfaces of the two propulsion members at the first connecting portion prevents intrusion of foreign matter such as earth and sand. .

Furthermore, in order to propel the propelling body in the ground in a curved manner, or to compactly wind and store the propelling body on the winding drum,
When it is desired to bend the propulsion device appropriately, the first connecting portion can be bent at the connecting portion by the elastic deformability of an elastically deformable seal member provided thereon, and the second connecting portion can be bent at the second connecting portion. In the connecting part, the connecting part is switched to the first state in which the bending posture is allowed by using the switching means, thereby enabling the bending at the connecting part. It can be bent.

Further, when it is desired to propel the propelling body linearly in the soil, the second connecting portion is switched to the second state in which the connecting portion is maintained in the linear posture by using the switching means, so that the connecting portion is connected to the second connecting portion. Of the propulsion body, and the propelling body can smoothly advance straight in the soil.

〔The invention's effect〕

Therefore, according to the propulsion device of the present invention, it is possible to prevent the problem that the inconvenience occurs by preventing foreign matters such as earth and sand from entering the gap in the first connection portion, and to connect the propulsion device to the winding drum. It can be wound up and stored compactly even when it is wound up and stored, and smooth propulsion is possible even when the propelling body is propelled straight in the ground. Moreover, in the propulsion device of the present invention, a part of the connecting portion has a structure in which the seal member is merely press-fitted into the gap, and has a simple structure.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 5, the plurality of propulsion bodies (B) ‥ constituting the propulsion body apparatus according to the present invention are composed of a combination of a propulsion head (1) and a plurality of propulsion pipes (2) ‥. They are connected in advance via a connecting portion (J).

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

In other words, the propulsion pipe (2) ‥ is pushed into the construction pit (5) while holding the propulsion pipe (2) ‥ while holding the propulsion head (1) connected to the tip thereof in the soil. A propulsion head (1) for pushing into the ground is provided with a pressing device (3) for propulsion, and the respective axes of the plurality of propulsion pipes (2) ‥ are arranged substantially in a straight line near a place where the propulsion pipes (2) ‥ enter the soil. A guide member (4) is provided for guiding into the soil while maintaining the state. A winding drum (6) for winding and storing the propulsion pipe (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 extended from the winding drum (6). Pressing member (1) supporting the propelling body (B)
It is a guide roller to guide to 7).

The propulsion head (1) has a head body (1A) having a small diameter of, for example, 50 to 70 mm, and a propelling body axis (P) (propulsion body) having the same diameter as the head body (1A) and having a diameter equal to that of the head body (1A). And a digging part (1B) rotatably mounted on the tip side around the head axis (P).

The excavation part (1B) receives the earth pressure in accordance with the propulsion of the propulsion head (1) in the soil and shifts the propulsion direction of the propulsion head (1) to the direction in which the earth pressure is received. The pressure receiving surface (F) is formed on an inclined surface closer to the axis (P) toward the tip end. When the propulsion head (1) is moved straight, the excavation portion (1B) is propelled while rotating with respect to the head body (1A), and when the propulsion head (1) is turned, the pressure receiving surface is located on the side opposite to the side to be turned. (F), and the propulsion direction of the propulsion head (1) is changed to the pressure receiving surface (F) by the earth pressure received by the pressure receiving surface (F).
Will be turned to the opposite side.

A connecting portion (J) for connecting adjacent ones of the plurality of propulsion bodies (B) to bend freely, that is, for connecting the propulsion head (1) and the propulsion tube (2) to bend freely. The connecting portion (J) and the connecting portion (J) for connecting adjacent ones of the propulsion pipes (2) so as to bend freely are configured as described in detail below (FIGS. 1 to 4). That is, in the connecting portion (J), the rear portion (FIG. 1 to FIG.
In FIG. 4, the left side corresponds to the rear) (B)
On the inner surface of the joint mounting part (B ₄ ) formed at the end (B ₂ ) of
With a coupling member (12) is fixedly screwed, the propellant propellant adjacent the front of the (B) end of the (B) to (B _1), propellant core the coupling member (12) (P) A fitting receiving portion (13) for swingably receiving in a direction perpendicular to the direction is formed. The joint member (12) is provided in a posture along a longitudinal direction of the propulsion body (B), and is formed by a shaft portion (12a) formed at a rear portion and a spherical joint portion (12b) formed at a front portion thereof. Consist of combinations. The shaft part (12a) is screwed and fixed to the front part of the rear propulsion body (B), and the spherical joint part (12b) is provided on a fitting receiver provided at the rear part of the front propulsion body (B). Part (13) is swingably fitted inside.

As shown in FIGS. 1 and 2 (A) and (B), a part of the plurality of connecting portions (J) are opposed end faces of the two propulsion bodies (B) and (B) adjacent to each other. The first connecting portion (J ₁ ) is formed by press-fitting an elastically deformable seal member (10) therebetween. In the first connecting portion (J ₁ ),
FIG. 2 (A) shows the elastic deformation capability of the seal member (10).
The bending posture shown in FIG. Moreover,
The presence of the seal member (10) prevents entry of foreign matter such as earth and sand.

Further, as shown in FIGS. 1, 3 and 4, the remaining portion of the plurality of connecting portions (J) is in a first state in which the connecting portion (J) is allowed to bend and its bending posture is prohibited. Switching means (K) for switching to the second state of maintaining the linear posture
And a second connecting portion (J ₂ ) provided with:

The switching means (K) is, specifically, a ring-shaped member having a strut (8a) which comes into contact with the end (B ₁ ) of the forward propulsion body (B) to realize the second state. A stopper (8) is provided. 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 stopper (8) has an uneven rear end surface, and a portion corresponding to the convex portion is widened to form the strut portion (8a). The stopper (8) is externally fitted to the outer surface of the joint mounting portion (B ₄ ) via a bush (21) functioning as a slide member and a slide bearing. Due to the presence of the bush (21), Sliding in the direction of the propulsion body axis (P) and rotation around the propulsion body axis (P) are performed smoothly. The bush (21) is made of a slide bearing made of, for example, a sintered alloy or Teflon. Further, a space (S) allowing the retraction of the strut (8a) of the stopper (8) from the end (B ₁ ) is formed at the front end (B ₂ ) of the rear propulsion body (B). ) Is formed.

According to the stopper (8), which propellant core (P) as appropriate the strut portion is rotated (8a) of the adjacent propellant around (B), the end of the (B) (B ₁₎ , (B ₂ )
The second state is realized by bringing the propulsion body into contact with each of the propulsion bodies (B) and (B) so that the connecting portion (J) of the propulsion bodies (B) does not assume a bent posture. By appropriately rotating around the core (P) and retracting the strut (8a) into the space (S), the connecting portion (J) between the two propulsors (B) and (B) is connected. The first state can be realized by being able to assume a bending posture.

Further, a covering portion (B ₃ ) that covers the space (S) is formed at an end (B ₂ ) of the rear propulsion body (B) provided with the space (S). More specifically, the end (B ₂ ) of the rear propulsion body (B) has an inner diameter larger than the outer diameter of the stopper (8) and an outer diameter toward the front toward the front. A ring-shaped covering portion (B ₃ ) approximately equal to the outer diameter of the protruding body extends from the propelling body body, and the covering portion (B ₃ )
Surrounds the space (S) and is covered from the outside. Note that the covering portion (B ₃ ) has such an extent that the end portion (B ₂ ) of the rear propulsion body (B) also covers the end surface that contacts the stopper (8) in the second state. It extends from the body. An annular seal member (22) is interposed at the sliding contact portion between the covering portion (B ₃ ) and the stopper (8). Intrusion is prevented.

When the connecting portion (J) of the propulsion body (B) is configured as described above, the propulsion body (B) provided with the space portion (S).
Since the covering portion (B ₃ ) that covers the space portion (S) is formed at the end portion (B ₂ ), the presence of the covering portion (B ₃ ) causes the second state to be realized. The open state of the space (S) is blocked. Therefore, foreign matter such as earth and sand can be prevented from entering the portion from the outside.

In the present embodiment, the propulsion body is in such a degree that the covering portion (B ₃ ) also covers the contact end face of the rear propulsion body (B) which contacts the end (B ₂ ) of the rear propulsion body (B) in the second state. Since it extends from the main body, the contact end surface in the second state is shielded from the outside, and foreign matter such as earth and sand can be prevented from entering from the outside also in that portion.

[Another Embodiment] As shown in FIG. 6, the switching means (K) contacts the end (B ₁ ) of the forward propulsion body (B) to realize the second state. An embodiment comprising a nut-shaped stopper (18) having a part (18a) is also conceivable. The switching between the second state and the first state in the contact portion (18a) is performed by a screwing portion formed on an outer periphery of an end (B ₂ ) of the rear propulsion body (B), The adjustment is performed by adjusting the screwing amount with a screwing portion formed on the inner periphery of the stopper (18) to be screwed.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the structure shown in the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 5 show an embodiment of a propulsion device for a propulsion method according to the present invention, and FIG. 1 shows a first connection portion and a second connection portion of the propulsion device. FIG. 2 (A)
(B) shows that the first connecting portion of the propulsion device is in the first state and the second state.
FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1 to show a second connecting portion of the propulsion device, and FIG. Exploded perspective view showing a part,
FIG. 5 is a side view showing the entire propulsion device including the propulsion device, and FIG. 6 is a longitudinal sectional view showing another embodiment of the propulsion device for a propulsion method according to the present invention. (10) Seal member, (B) Propeller, (K)
Switching means, (J) ...... connecting portion, (J ₁₎ a first coupling part ......, (J ₂₎ ...... second coupling portion.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuhiko Mukai, 1-1-1, Hama, Amagasaki-shi, Hyogo Inside Kubota Technology Development Laboratory Co., Ltd. (72) Takashi Oshima 1-1-1, Hama, Amagasaki-shi, Hyogo Shares Inside the Kubota Research Institute of Technology (72) Inventor Masaya Hattori 1-1-1, Hama, Amagasaki-shi, Hyogo Prefecture Inside the Kubota Research Institute of Technology, Inc. (72) Tomonori Kawabata 1-1-1 Hama, Amagasaki-shi, Hyogo No. In Kubota Technology Development Laboratory Co., Ltd. (56) References JP-A-2-161095 (JP, A) JP-A-2-1611094 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB (Name) E21D 9/06 311

Claims (1)

(57) [Claims] 1. A propulsion body device for a propulsion method comprising a plurality of connecting portions (J) in which mutually adjacent protruding bodies (B) and (B) are flexibly connected to each other, wherein the plurality of connecting portions (J) are provided. ), A first connecting portion (J ₁ ) formed by press-fitting an elastically deformable seal member (10) between opposing end faces of the two propulsion bodies (B) and (B) adjacent to each other.
And a second state in which the remaining portions of the plurality of connecting portions (J) are allowed to be bent in the connecting portion (J), and a second state in which the bent portions are prohibited and held in a linear position. A propulsion device for a propulsion method, comprising a second connecting portion (J ₂ ) provided with a switching means (K) for switching between the two.