JPH044070Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a joint cylinder used in auger drilling, which applies rotational force and pushing force to casings of different diameters to drill holes.

<Purpose of the invention> The object of the invention is to provide a joint tube for use in auger excavation, which can easily be used with casings of different diameters.

<Configuration of the present invention> Hereinafter, an embodiment of an auger excavator according to the present invention will be described with reference to the drawings.

(b) Overall structure of auger excavator An example of an auger excavator is shown in FIGS. 1 to 3.

To explain based on the drawings, 1 is a main body having a traveling function, 2 is a leader supported on the main body 1, 3 is an earth auger, 4 is a casing, and 5 is a joint tube connected to the upper end of the casing 4.

An auger drive section 6 for imparting rotation to the earth auger 3 is attached to the upper side of the leader 2 so as to be movable up and down, and the upper end of the earth auger 3 is connected to this auger drive section 6.

A casing drive unit 7 is provided at the bottom of the leader 2 and includes means for applying rotation and pushing force to the casing 4 via a joint cylinder 5.

Unlike the auger drive unit 6, the casing drive unit 7 is located on the lower side of the leader 2 close to the ground surface.

The structure of each part will be explained in detail below.

(b) Joint cylinder (Fig. 3) The joint cylinder 5 is a funnel-shaped cylinder connected to the upper end of the casing 4, and the lower part of the side part 51 has a tapered surface 52 with a narrowed diameter.
A plurality of short cylindrical connecting portions 53 having different diameters are provided on the lower surface of 2.

Each connection portion 53 has a concentric relationship with the circle of the side portion 51 of the joint tube 5 when the joint tube 5 is viewed from above.

The reason why a plurality of connecting portions 53 having different diameters are provided is to connect casings 4 having different diameters.

Therefore, the diameter of each connection portion 53 is determined based on the diameter of the existing casing 4.

The connecting portion 53 and the casing 4 may be connected by, for example, welding the upper end of the casing 4 and the lower end of the connecting portion 53 together, or by welding the upper end of the casing 4 and the lower end of the connecting portion 53.
A method such as welding the upper end of the connecting portion 53 to the connecting portion 53 can be adopted.

Moreover, on the outer periphery of the side part 51 of the joint cylinder 5,
A gear 54 is provided in the circumferential direction.

The gear 54 is attached to the side portion 5 by bolting or welding.
Securely fix it to 1.

(c) Auger drive unit The auger drive unit 6 consists of, for example, a rotating motor,
It engages with the leader 2 so as to be able to move up and down.

The earth auger 3 uses the rotational force of the auger drive unit 6 and its own weight as a drilling force.

(d) Casing drive unit [pushing means] A bracket 21 is attached to the lower part of the leader 2, and a plurality of pushing cylinders 8 are suspended from this bracket 21.

The lower end of each pushing cylinder 8 is connected to an annular body 9 .

The ring body 9 has a U-shaped cross section, and a plurality of rollers 10 are arranged within the opening of the ring body 9.
It contacts the upper end of the joint tube 5 via the roller 10.

The reason why the roller 10 is provided in the ring body 9 is to transmit the pushing force of the pushing cylinder 8 while allowing the joint cylinder 5 to rotate.

[Rotating Means] As a means for applying rotational force to the joint cylinder 5, in this embodiment, a method of transmitting the rotation of the rotary motor 11 using a chain 12 is adopted.

That is, as shown in FIGS. 2 and 3, a rotary motor 11 is provided at the end of a stay 13 extending from the ring body 9,
By winding the chain 12 between the rotary motor 11 and the gear 54 on the outer periphery of the joint tube 5, the rotation of the rotary motor 11 is transmitted to the joint tube 5.

<Operation of the present invention> Next, the operation of the auger excavator will be explained.

(a) Preparation for drilling Prior to drilling, connect the joint pipe 5 to the upper end of the casing 4 in advance.

Then, the upper end of the joint cylinder 5 is set in the casing drive section 7 at the lower part of the leader 2.

On the other hand, the upper end of the earth auger 3 is connected to an auger drive section 6 located at the top of the leader 2.

(b) Start of drilling The auger drive section 6 and casing drive section 7 are operated to start drilling work.

The earth auger 3 receives rotation of the auger drive unit 6.
Drilling progresses.

The auger drive unit 6 descends while engaging the leader 2 in response to the penetration of the earth auger 3.

In parallel with this, the rotational force of the rotary motor 11 is transmitted to the joint tube 5 via the chain 12 and the gear 54, and at the same time, a pushing force is applied to the joint tube 5 via the roller 10 due to the extension of each pushing cylinder 8.

Since the joint tube 5 is integrally connected to the casing 4, drilling by the casing 4 progresses under the rotation and pushing force of the joint tube 5.

The reaction force of the pushing force of the casing 4 is secured from the leader 2 to which the base end of the pushing cylinder 8 is connected.

Since the rotary motor 11 moves together with the ring body 9, the chain 12 is connected to the gear 54 while the casing 4 is being drilled.
There is no need to worry about it falling off.

The excavated earth and sand are transported by the earth auger 3 inside the casing 4.
It is transferred to the ground side by the casing 4 and discharged from the upper part of the casing 4.

(c) Extension of auger and casing When the pushing cylinder 8 reaches its maximum extension, the drilling is stopped and extension members are connected to each casing 4 and the earth auger 3, respectively.

That is, when newly connecting the casing 4, the new casing 4 is connected after separating the casing 4 that has penetrated into the ground and the joint tube 5.

Each time the extension casing 4 is connected, the joint tube 5 is used by being separated from the existing casing 4 and connected to the upper end of the new casing 4.

On the other hand, the earth auger 3 is connected to the earth auger 3 for extension of a fixed size, as in the conventional case, and the drilling operation is restarted.

While repeating the above steps, the hole is drilled to a predetermined depth.

Furthermore, when using casings 4 with different diameters, a connecting portion 53 that matches the diameter of the casing 4 is selected, and the upper end of the casing 4 is connected and a hole is drilled.

<Other Embodiments 1> As another means for imparting rotational force to the joint tube 5, it is also possible to transmit the rotational force by directly meshing the gear on the rotary motor 11 side with the gear 54 described above.

<Other Embodiment 2> (FIGS. 4 and 5) As another means for applying rotational force to the joint cylinder 5, without using the chain 12 or the gear 54,
A method in which a rope material 14 such as a belt material or a wire rope is strung between the rotary motor 11 and the peripheral surface of the side portion 51 of the joint tube 5 is also possible.

In this case, slipping of the rope material 14 can be prevented by wrapping the rope material 14 around the circumferential surface of the joint tube 5 several times.

Further, in consideration of damage to the joint tube 5, it is also possible to cover the upper part of the joint tube 5 with a protective tube 15 made of resin.

The protection tube 15 is a cushioning material consisting of a top part 16 interposed between the upper part of the casing 4 and the roller 10, and a skirt part 17 interposed between the rope material 14 and the circumferential surface of the casing 4.

Note that the other configurations are the same as those of the above-described embodiment, so the same reference numerals are given and the explanation thereof will be omitted.

<Effects of the present invention> Since the present invention is as explained above, even if the diameter of the casing is different, rotation and pushing force can be applied to the casing by selecting and connecting the lower part of the joint tube. It has excellent compatibility with the casing.

[Brief explanation of the drawing]

Fig. 1: Overall explanatory diagram of the auger excavator, Fig. 2: Perspective view of essential parts, Fig. 3: Vertical sectional view of the casing drive section, Fig. 4: Explanatory diagram showing other embodiments. FIG. 5 is a vertical cross-sectional view of the casing drive section...
...A sectional view taken along line V-V in FIG. 4.

Claims (1)

[Scope of Claim for Utility Model Registration] A funnel-shaped cylinder connected to the head of a casing that receives rotational force to drill a hole, the cylinder having a plurality of short cylinders with different diameters protruding from the lower part of the cylinder. , A joint cylinder used for auger excavation that can be rotated around the axis of the casing and pushed in the axial direction.