JPH07173985A - After-boring surplus soil removal device for auger screw - Google Patents

Abstract

PURPOSE:To properly and safely remove earth. CONSTITUTION:An auger screw 1 is formed out of a rotating shaft la and a screw blade 1b. A base frame 2 is fixed to the leader mast 3 of the screw 1. Also, a holder frame 4 is journalled to the base frame 2 and can reciprocatively turn on the operation of a hydraulic cylinder 5 about a journal 4a. A turning shaft 6 is connected to the upper and lower arms 4b and 4c of the frame 4, so as to be freely rotatable. Furthermore, the shaft 6 is integrally fitted with a spiral body 7 for scraping drilled earth. In this case, the body 7 is formed out of an upper spiral side 7a, a lower spiral side 7b and a spiral external side 7c formed between the external peripheral ends of the sides 7a and 7b. The upper and lower spiral sides 7a and 7b form a spiral plane in a direction opposite to the screw blade 1b, and the radius (r) thereof is approximately equal to the radius R of the blade 1b. Also, the breadth 7c of the spiral external side 7c is sized to be slightly smaller than the pitch P of the blade 1b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auger screw drilling residual soil removing device used for drilling work such as foundation pile work.

[0002]

2. Description of the Related Art Generally, residual soil due to drilling tends to adhere to screw blades of an auger screw used for drilling work such as foundation pile work. In particular, clay soil has a strong adhesive force and is heavy. Therefore, if the auger screw is pulled out with the residual soil attached to the screw blades, the weight of the earth auger leader mast, etc., may easily fall over, and the residual soil may drop, which is extremely dangerous. Need to be removed.

For this reason, in general, a worker uses a scoop to scrape off the remaining soil adhering to the screw blades.

However, in the scraping work by human power, since the scoop must be brought into contact with the rotating auger screw and the scraping must be carried out in accordance with the rotation, it is not only very dangerous and requires skill, but also requires heavy labor. Workers will suffer.

In order to solve such a problem, conventionally,
Although a device for scraping off by inserting a mud cutting device such as a spring, a brush, or a scraper between the screw blades has been developed, none of them has the actual effect.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a remnant of auger screw drilling that enables reliable and safe removal of discharged soil. It is to provide a removal device.

[0007]

An auger screw drilling residual soil removing device according to the present invention has upper and lower spiral surfaces formed in opposite spirals having a spiral pitch and mutual spacing substantially the same as the screw pitch of the screw blades. And a spiral outer peripheral surface formed between the outer peripheral edges of these upper and lower spiral surfaces are provided so as to be rotatable and not to move in the vertical direction, and to rotate and / or rotate the auger screw. It is characterized in that it is configured to rotate along with axial movement.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an auger screw, which is composed of a rotary shaft 1a and screw blades 1b. The screw blade 1b has a predetermined pitch P and radius R.

Reference numeral 2 is a base frame, which is fixed to the leader mast 3 of the auger screw 1. A holder frame 4 is pivotally attached to the base frame 2 so that the holder frame 4 can be reciprocally rotated about a pivot 4a between a solid line and an imaginary line. This reciprocating rotation is driven by the hydraulic cylinder 5.

Upper and lower arms 4 of the holder frame 4
The swivel shaft 6 is attached to b and 4c so as to be freely rotatable. A spiral body 7 for scraping off the soil is integrally attached to the swivel shaft 6. Therefore, the spiral body 7 can freely rotate, but does not move in the vertical direction (axial direction of the turning shaft 6).

The spiral body 7 is composed of an upper spiral surface 7a and a lower spiral surface 7b, and a spiral outer peripheral surface 7c formed between the outer peripheral edges of the upper and lower spiral surfaces 7a and 7b.

The upper and lower spiral surfaces 7a and 7b are spiral surfaces in the opposite direction to the screw blade 1b, and the radius r thereof is substantially the same as the radius R of the screw blade 1b. The width p of the spiral outer peripheral surface 7c is slightly smaller than the pitch P of the screw blades 1b.

Since the apparatus of the above-mentioned embodiment is constructed as described above, the holder frame 4 is operated by the hydraulic cylinder 5 to move the spiral member 7 as shown in FIG.
When is moved from the solid line state to the virtual line state, a part thereof is inserted between the screw blades 1b of the auger screw 1. (See also Figure 3)

When the auger screw 1 is raised while rotating in the direction of arrow A in this state, the spiral body 7 follows in the direction of arrow B by the cam action of the spiral surface of the screw blade 1b and the lower spiral surface 7b of the spiral body 7. To rotate.

When the spiral body 7 rotates in the B direction, when the lower spiral surface 7b thereof enters between the screw blades 1b,
The soil attached to the screw blade 1b is pushed out and eliminated.

The auger screw 1 is attached to the arrow C.
When the spiral body 7 is rotated in the direction of the arrow A while being raised in the direction, the rotation speed of the spiral body 7 increases. Further, when the auger screw 1 is rotated in the opposite direction (direction opposite to the arrow A), the spiral body 7 also rotates in the opposite direction (direction opposite to the arrow B) to perform the same exclusion action.

[0017]

【The invention's effect】

1) Since the spiral body is configured to rotate following the rotation and / or axial movement of the auger screw,
Soil can be removed reliably and almost completely. 2) Workers can be freed from the heavy work of scraping.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an auger screw and a drilling residual soil removing device of the present invention.

FIG. 2 is a plan sectional view taken along the line E-I of FIG.

FIG. 3 is an explanatory diagram of a scraping action by a spiral body.

[Explanation of symbols]

 1 Auger Screw 1a Rotating Shaft 1b Screw Blade 2 Base Frame 3 Leader Mast 4 Holder Frame 4a Axis 4b Arm 4c Arm 5 Hydraulic Cylinder 6 Swivel Axis 7 Helix 7a Upper Helical Surface 7b Lower Helical Surface 7c Helical Outer Surface A Rotational Direction B Rotation Direction P Pitch p Pitch R Radius r Radius

Claims (1)

[Claims] 1. A spiral shape formed between upper and lower spiral surfaces having spiral pitches substantially the same as those of the screw blades and having mutual intervals and forming spirals in opposite directions, and outer peripheral edges of these upper and lower spiral surfaces. A spiral body composed of an outer peripheral surface is provided so as to be rotatable and not to move in the vertical direction, and is configured to rotate following the rotation and / or axial movement of the auger screw. Auger screw drilling residual soil removal device.