JP2598031Y2 - Drilling depth detector for drilling rod type excavator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the excavation depth of a drill rod in an excavator equipped with a drill rod such as an auger rod and a stirring rod.

[0002]

2. Description of the Related Art Conventionally, for example, a leader mast is vertically supported by a base machine, and a suspension wire drawn from a winch on the base machine is supported by a top sheave block of the leader mast and the leader mast so as to be able to move up and down. The auger excavator having the auger excavator in which the auger driving device is hung on a moving sheave block by hanging around the hanging sheave block of the auger driving device several times and the auger rod is connected to the output shaft of the auger driving device. A pair of pulleys for holding the hanging wire at a position close to the above are provided, and a rotary encoder is operatively linked to one of the pulleys, and the sending length of the hanging wire is measured to detect the excavation depth of the auger rod. Devices are known.

[0003]

However, in the conventional excavation depth detecting device, the mounting position of the rotary encoder is a suspension wire near a winch, and the suspension wire sending speed at this position is high. , The slip speed between the suspension wire and the pulley occurs, and the accuracy of depth detection is reduced.
An object of the present invention is to eliminate the conventional disadvantages.

[0004]

Means for Solving the Problems As means for solving the above problems, the present invention is directed to a top sheave block comprising a plurality of sheaves at the upper end of a leader mast and a plurality of excavating rod driving devices supported on the leader mast so as to be able to move up and down. In a drilling rod type excavator comprising a hanging sheave block consisting of a sheave and hanging wires several times to suspend the drilling rod driving device in a dynamic pulley manner, and connecting a drilling rod to the drilling rod driving device, A digging depth detecting device for a digging rod type excavator, in which a rotary encoder is linked to a lowest speed sheave of the hanging sheave block so as to be interlockable, is proposed. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0005]

1 and 2, a top sheave block (3) comprising a plurality of sheaves is provided at the upper end of a leader mast (2) vertically supported at the front end of a base machine (1). An excavating rod driving device (5) including a motor and a speed reducer is connected to two guide rails (4) and (4) attached along the longitudinal direction of (2) via slide fittings (6). A suspension sheave block (7) composed of a plurality of sheaves is attached to the upper end of the driving device (5) so as to be slidable up and down, and the top sheave block (3) and the suspension sheave block (7) as described above.
And a wire (9) drawn from a winch (8) installed on the base machine (1).
0), the sheaves of the top sheave block (3) and the sheaves of the suspended sheave block (7) are sequentially wound around the sheave,
The tip of the wire (9) is connected to an appropriate position of the frame of the top sheave block (3), whereby a plurality of excavating rod driving devices (5) are suspended in a vertically movable pulley manner.

The lowest speed sheave (11) of the plurality of sheaves in the hanging sheave block (7) is shown in FIG.
As shown in FIG. 2, an annular gear (13) is concentrically fixed to one end of the boss (12), and a rotary encoder (15) is attached to one end of a sheave block case (14). The gear (16) fixed to the detection shaft of (15) is engaged with the ring gear (13).

[0007] (17) is a stirring rod connected to the rotary output shaft of the driving device (5).

When the drive unit (5) is started to rotate the stirring rod (17) to excavate into the ground and loosen the wire (9) in accordance with the excavation, the lowest speed sheave ( 11) rotates slowly, rotates the encoder (15) via the ring gear (13) and the gear (16), and detects the excavation depth of the stirring rod (17) by the encoder (15).

According to the invention of the present application, the accuracy of the excavation depth detection can be greatly improved because the rotary encoder is linked to the lowest speed sheave in the suspension sheave block.

[Brief description of the drawings]

FIG. 1 is a side view of a drill rod excavator.

FIG. 2 is an enlarged partial cutaway front view of a hanging sheave block.

[Explanation of symbols]

 2 Leader mast 3 Top sheave block 5 Drilling rod drive 7 Hanging sheave block 9 Hanging wire 11 Lowest speed sheave 15 Rotary encoder 17 Stirring rod

────────────────────────────────────────────────── (5) References JP-A-4-333796 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01B 5/00-5/30 G01B 21 / 00-21/32 E21B 47/04

Claims (1)

(57) [Scope of request for utility model registration] A suspension wire is wound several times around a top sheave block comprising a plurality of sheaves at the upper end of a leader mast and a suspension sheave block comprising a plurality of sheaves of a drill rod driving device supported on the leader mast so as to be able to move up and down. In an excavating rod type excavator in which the excavating rod driving device is suspended in a moving pulley type and an excavating rod is connected to the excavating rod driving device, a rotary encoder is operably linked to the lowest speed sheave in the hanging sheave block. Drilling depth detector for drilling rod type excavator.