JPH04108680U - Propulsion device connection structure - Google Patents

Abstract

(57) [Summary] [Structure] In a connecting part structure of a propelling device in which both adjacent propelling bodies B, B are connected to each other in a bendable state via a connecting part J, one propelling body B is bent. The abutting portion 13a that abuts the other propelling body B at this time is configured to be separable from the main body side portion, and the abutting portion 1
3a is made of a softer material than the material of the abutting portion of the other propelling body B. [Effect] During the bending, the abutting portion, which is configured to be soft, constantly wears out. Furthermore, the abutting portion that wears out can be separated from the main body side portion, and a portion of the main body can be replaced. Therefore, it is possible to reduce the cost of spares prepared for replacement.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a connecting structure of a propellant device, and more specifically, to Regarding the structure of the connecting part of a propulsion device that is connected to each other in a bendable state through a connecting part. do.

0002

[Conventional technology]

In conventional propellant devices, the main body of the propellant (especially its both ends) is Both were made of the same material.

0003

[Problem that the idea aims to solve]

When propelling the propellant device while bending, the two adjacent propellant devices face each other. The ends come into contact with each other during the bending, and wear occurs at the contact portion. Ru. As the wear progresses, the maximum bending angle at the connecting portion increases. Since the meandering of the propellant device increases during propulsion, the propellant device needs to be replaced. It becomes important. By the way, conventionally, as mentioned above, the main bodies of the propellant bodies were all made of the same material. Since the main body of the propellant body is made of high quality steel, both the front and rear parts of the propellant body are subject to wear. Therefore, it becomes necessary to replace both parts, and a large number of large-scale spares must be prepared. However, there was a problem in that maintenance costs were high. The present invention was devised by paying attention to this actual situation, and it reduces the maintenance costs mentioned above. The purpose is to provide a means to reduce the amount of waste.

0004

[Means to solve the problem]

The characteristic configuration of the connection structure of the propellant device according to the present invention is that one of the two propellants is The abutment part where one propelling body butts against the other propelling body during the bending is connected to its main body. It is configured to be separable from the side portion, and its abutting portion is connected to the other propelling body. The material is softer than the material of the abutting part.

[0005]

[Effect]

According to this characteristic structure, when the bending is performed, the one thrust having a soft structure The contact part of the shin body will constantly wear out. Moreover, the contact part that wears out, It is separable from the main body side part, and part of the main body can be replaced.

[0006]

[Effect of the idea]

Therefore, the number of spares that need to be replaced due to wear has been reduced compared to the past. The maintenance costs can be reduced by reducing the number of items and reducing the number of items. The conventional problems can be solved.

[0007]

【Example】

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

[0008] FIG. 2 shows a propulsion device according to the present invention, that is, a propulsion head 1 and a plurality of propulsion tubes 2. ‥The propulsion device that propels the propellant device connected through the connecting part J into the ground is propelled by the Shown with body equipment. Specifically, the propulsion machine is configured as described below. has been done.

[0009] That is, the tip of the propulsion pipe 2 is held and pressed into the construction pit 5. In order to propel the propulsion head 1 connected to the soil into the soil, the propulsion tube 2 is pushed into the soil. A pressing device 3 for propelling the advancement head 1 is provided, and a plurality of propulsion pipes 2 are inserted into the ground. Insert the soil into the soil while keeping each axis lined up in a substantially straight line near the point where it is to be penetrated. A guide member 4 for guiding is provided. In addition, on the outside of the upper part of the construction pit 5, A winding drum 6 for winding and storing the propulsion tube 2 is provided. In addition, 7 is the construction pitch. 9 is a support jack that supports the side wall of the vehicle from the inside to prevent it from collapsing. Supports the propelling body B that is fed out from the recording drum 6 and guides it to the pressing device 3. This is a guide roller.

0010 The propulsion head 1 includes a head main body 1A with a small diameter of, for example, 50 to 70 mm, and a head main body 1A with a small diameter of, for example, 50 to 70 mm. The propulsion body axis P (propulsion head axis P) It consists of an excavation part 1B that is rotatably attached to the tip side.

[0011] The excavation part 1B receives earth pressure as the propulsion head 1 is propelled into the soil. Pressure receiving surface F for biasing the propulsion direction of the propulsion head 1 in the direction in which the earth pressure is received is formed into an inclined surface that approaches the axis P closer to the tip end. And before When the propulsion head 1 is moved straight, the excavation part 1B is moved relative to the head body 1A. It is propelled while rotating, and when turning, the side opposite to the side to be turned is It is propelled with the pressure receiving surface F facing the opposite side, and the propulsion head is propelled by the earth pressure that the pressure receiving surface F receives. The direction of propulsion of the door 1 is directed to the opposite side from the pressure receiving surface F.

0012 A connecting portion J that bendably connects adjacent ones of the plurality of propellants B. (That is, a connecting portion J that connects the propulsion head 1 and the propulsion tube 2 in a flexible manner; And the connection part J) that connects adjacent propulsion pipes 2 in a flexible manner is as follows: It is structured as detailed in the following.

That is, as shown in FIG. 1, the connection J (the figure shows the connection J between adjacent propulsion tubes 2, but the connection J between the propulsion head 1 and the propulsion tube 2 is also configuration), the joint member 12 is fixed to the joint attachment part B ₄ formed at the end B ₂ of the propellant B at the rear (the left side corresponds to the rear in the figure), and the A fitting receiving portion 13 for receiving the joint member 12 in a swingable manner in a direction orthogonal to the axis P of the propellant body is formed at an end B ₁ of the propellant body B adjacent to the front thereof.

The joint member 12 is provided along the longitudinal direction of the propulsion body B, and is composed of a shaft portion 12a formed at the rear and a spherical joint portion 12b formed at the front thereof. The shaft portion 12a is internally fitted into the joint attachment portion _B4 provided at the front portion of the rear propulsion body B (more specifically, into a female threaded portion formed on the inner surface thereof) and is screwed and fixed. Alternatively, it may be fitted into the joint mounting portion B ₄ (more specifically, into the straight hole on the inner surface thereof) and fixed with a pin (more specifically, extending between the joint mounting portion B ₄ and the shaft portion 12a). The spherical joint part 12b is attached to the rear propelling body B side by fixing with a pin 23), and the spherical joint part 12b is attached to the fitting receiving part 13 provided at the rear of the forward propelling body B. It is attached to the front propulsion body B side by being fitted inside so as to be swingable.

[0015]The portion where the shaft portion 12a is fitted into the joint mounting portion _B4 and fixed with a pin corresponds to a first connecting portion _J1 to be described later. In the first connecting part _J1 , both the propelling bodies B, B connected thereto are configured to be able to bend freely as described below, so if the degree of bending is large, both the propelling bodies B, B are They come into contact with each other. Therefore, simply fitting the shaft portion 12a into the joint mounting portion _B4 and screwing it in _place will not provide enough fixing strength. It is fitted inside part _B4 and fixed with a pin.

[0016] The fitting receiving part 13 fits inside the front part of the spherical joint part 12b so that it can be taken in and out. a main body portion 13b, and a main body portion 13b that is inserted into and taken out from the main body portion 13b; A lid is attached to the main body portion 13b so that the spherical joint portion 12b cannot be taken out. A lid-shaped portion 13a (specifically, the main body portion 13 A female screw portion formed on the inner circumferential portion of the rear end of b is attached to the outer circumferential portion of the distal end of the lid-like portion 13a. By screwing together the formed male threaded portion, the lid-like portion 13a is attached to the main body portion. 13b). And the lid shape When the portion 13a is bent, one of the adjacent propellant bodies B, B is bent. This is the abutting part that comes into contact with B (in the figure, the front end of the rearwardly adjacent propellant B). The abutting portion 13a is the abutting portion of the other propellant B (the tip of the rear propellant B). The material is softer than that of the Specifically, the contact portion 13a is A softer resin (for example, Constructed from MC nylon.

[0017] When the contact portion 13a of the front propellant B is configured as described above, During the bending, the soft contact portion 13a is constantly worn out. Become. Moreover, the contact portion 13a that wears out is separated from the main body portion 13b. Because it is configured to be removable, it is possible to partially replace the main body of propellant B. Ru. Note that the contact portion 13a is replaced by the main body portion 13 for replacement due to wear. The spherical joint portion 12b is not configured to be detachable from the spherical joint portion 12b. In order to fit smoothly into the fitting receiving part 13, it is originally attached to and detached from the main body part 13b. Its removable structure can be separated for replacement due to wear and tear. This is an effective use of flexible structure.

As shown in FIG. 1, some of the plurality of connecting portions J are formed by press-fitting an elastically deformable sealing member 10 between opposing end surfaces of the two adjacent propelling bodies B, B. 1 Consists of connecting part _J1 . The first connecting portion _J1 can be bent due to the elastic deformability of the seal member 10. Furthermore, the presence of the seal member 10 prevents foreign matter such as earth and sand from entering.

[0019] The outer diameter of the seal member 10 is appropriately larger than the outer diameter of the propellant B. It is set to a small diameter. The reason is that the outer diameter of the seal member 10 is adjusted appropriately. By setting the diameter to a small diameter, the abutting part of the forward propelling body B during the bending. The sealing member 10 is not sandwiched between the portion 13a and the front end of the rear propelling body B. This is to improve the durability of the seal member 10.

Furthermore, as shown in FIG. 1, the remaining portions of the plurality of connecting portions J are in a first state in which the connecting portions J are allowed to have a bent posture, and in a second state in which the bent posture is prohibited and maintained in a straight posture. The second connecting portion _J2 is provided with a switching means K for switching between the two states.

[0021] Specifically, the switching means K is constituted by a nut-shaped stopper 8 that is screwed into a male screw portion formed on the outer circumference of the end _B2 of the rear propelling body B. That is, by rotating the stopper 8, the screwing position thereof is changed in the front-back direction, and the switching is performed by adjusting the position. For example, when the screwing position of the stopper 8 is changed forward, its front end comes into contact with the rear end _B1 of the forward propelling body B, and the second state is realized by this contact. It becomes like this. Conversely, when the screwing position of the stopper 8 is changed rearward (see FIG. 1), its front end becomes separated from the rear end _B1 of the forward propelling body B, and this separation causes the stopper 8 to move backward. 1 state will be realized.

[0022] Next, another embodiment of the present invention will be described. In the above-described embodiment, the propellant B including the soft and separable contact portion 13a is was the forward propellant B, but conversely, the abutment part of the rear propellant B was made soft and self-separable. It may be configured as is.

[0023]The present invention can also be implemented in a configuration in which the switching means K in the second connecting portion _J2 has a configuration different from that of the above-described embodiment. For example, when the switching means K is rotated in a certain direction, the protrusion part (the rear end has irregularities) comes into contact with the rear end _B1 of the forward propelling body B. Then, the second state is realized, and further rotation in the direction (or rotation in the opposite direction) is performed from that state, so that the contact state of the protrusion is released (specifically Specifically, the convex portion at the uneven rear end of the protruding portion retreats into a recessed space formed in the front end _B2 of the rear propelling body B, whereby the contact state of the protruding portion is released. ), the present invention can also be implemented in a ring-shaped stopper configured to realize the first state.

[0024] In addition, in order to facilitate comparison with the drawings, symbols are written in the scope of claims for utility model registration. However, the present invention is not limited to the configuration shown in the attached drawings.

[Brief explanation of drawings]

[Fig. 1] A vertical cross-sectional view showing the structure of the connecting part of the propellant device according to the present invention.

[FIG. 2] A side view showing a propulsion device that propels the propulsion device.

[Explanation of symbols]

13a Contact part B Propellant J connection part

Continuation of front page (72) Creator Tomasa Kawabata 1-1-1 Hama, Amagasaki City, Hyogo Prefecture Co., Ltd. Inside Kubota Technology Development Laboratory

Claims (1)

[Scope of utility model registration request] 1. A connecting part structure of a propelling body device in which both adjacent propelling bodies (B), (B) are connected to each other in a bendable state via a connecting part (J), wherein both said propelling bodies (B),(B)
The abutting portion (13a) where one of the propellants (B) abuts the other propellant (B) during the bending is configured to be separable from the main body side portion, and the abutting portion (13a) 13a) is made of a softer material than the abutting portion of the other propellant (B).