JP2661634B2 - Drilling rig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavator for loading dynamite into an excavation pit and crushing the pit to perform excavation.

[0002]

2. Description of the Related Art Conventionally, such a device is fixed to a pit wall by a support cylinder in a hanging work position by a crane,
Working.

[0003]

The support cylinder in the conventional apparatus is suspended so as not to interfere with the pit wall in a normal state, that is, at the time of ascending and descending, and when fixed, it is rotated horizontally and extended to extend the apparatus. All fixing to the pit wall was done manually.

[0004] Therefore, the workability is poor and dangerous.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an excavator capable of safely fixing the apparatus to a pit wall without manual operation.

[0006]

According to the excavator of the present invention, a gantry suspended in an excavation pit by an elevating means, and a pit bottom provided on a lower end of a pole suspended from the gantry via a turning device. Bottom detection means for detecting a plurality of support cylinders, one end of which is pivotally attached to the top of the gantry and is normally suspended,
A support lift cylinder that rotates the support cylinder to a horizontal position according to a detection signal from the downhole detection means,
A boom having an upper end pivotally attached to the swing mechanism and swinging by a first swing cylinder; and a guide shell pivotally attached to a lower end of the boom and swinging by a second swing cylinder and swinging by a swing cylinder. A screw rod guided by the guide shell and moved up and down by a vertical cylinder, a rotary bit provided at a lower end of the screw rod, and a drilling machine screwed to the screw rod and fed by a feed motor. Is provided.

[0007] Preferably, the downhole detecting means comprises a set rod protruding from the lower end surface of the pole and a limit switch which is closed by upward movement of the set rod.

[0008]

In the excavator constructed as described above,
When the device is suspended in the digging pit and the detection rod at the lower end of the pole contacts the pit bottom and moves upward, the limit switch is closed. Then, the support lift cylinder extends and rotates the support cylinder to the horizontal position. The pivoted support cylinder then extends and secures the device to the pit wall.

Next, the drilling machine is turned to a predetermined position on the bottom of the pit by a turning mechanism, and the drilling machine is moved down by a feed motor to cut a dynamite insertion hole and insert dynamite.
Therefore, the support cylinder is contracted, the support lift cylinder is contracted, the support cylinder is suspended, the device is lifted and retracted, and the pit is crushed by dynamite. Next, the waste is carried out of the mine by means (not shown), and the apparatus is again suspended, and excavation is performed by repeating the procedure as described above.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1, 2 and 3, a pole 12 is suspended from a gantry 1 suspended by a lifting means such as a crane (not shown) via a turning mechanism 10.

One end of a plurality (four in the illustrated example) of support cylinders 2 is pivotally connected to the upper edge of the gantry 1 in a circumferentially equidistant manner, and normally hangs at a position 2A. A support lift cylinder 3 is interposed between the support cylinder 2 and the center of the gantry 1 and extends to extend the support cylinder 2.
Is rotated to a horizontal position. In addition, stand 1
A hydraulic unit 4 and an oil reservoir 5 are provided at the bottom, a cable reel 6 of a power cable (not shown) is provided at the top, and a hook 7 is provided at the top.

The turning mechanism 10 is fixed to the bottom of the gantry 1 and is turned by a hydraulic motor 11.
A yoke base 16 protrudes from a side portion of the turning mechanism 10, and a pole 12 is connected to a bottom portion. At the lower end of the pole 12 is provided a downhole detection means indicated generally by the reference numeral 13, and at the lower portion, an operation switch 8 is provided.

Referring also to FIG. 4, a downhole detecting means 13 includes a set rod 14 protruding from the lower end face of the pole 12 and a limit switch 1 which is closed by upward movement of the set rod 14.
It consists of five.

One end of a boom 17 is pivotally connected to the upper pin 16a of the yoke base 16, and a first swing cylinder 1 interposed between the middle of the boom 17 and the lower pin 16b.
8 swings between a position 18A. A bracket 20 is pivotally connected to the other end of the boom 17 by a pin 21, and the arm 20a and the boom 17
Is swingable by a second swing cylinder 19 interposed in the middle. A bracket 22 is pivotally attached to a boss portion 20b of the bracket 20 orthogonal to the pin 21.
The swing is made by a swing cylinder 23 interposed between the lower end and the boss 20b.

The bracket 22 is slidable relative to the guide shell 24, and the lower end 25b of a piston rod 25a of a vertically moving cylinder 25 attached to the bracket 22 is pivotally connected to the guide shell 24. . A feed motor 29 is provided on the top of the guide shell 24, and the feed motor 29 rotates a screw rod S provided in the guide shell 24. A drilling machine 27 is screwed onto the screw rod S, and therefore the feed motor 2
With the rotation of 9, the drilling machine 27 can move up and down along the guide shell 24. A drill 28 provided with a rotary bit 26 at the tip is attached to the drilling machine 27, and a dynamite insertion hole 33 is drilled in the downhole 31.

Next, the mode of excavation will be described.

The apparatus is suspended inside the excavation pit 30 by, for example, a crane. When the set rod 14 comes into contact with the bottom and moves upward, the top of the rod 14 is detected, and the limit switch 15 is closed. Then, the support lift cylinder 3 is extended, the support cylinder 2 is rotated from the position 2A to the horizontal position, and the support cylinder 2 is extended to fix the apparatus to the pit wall 32.

Next, the feed motor 29 is operated, the drilling machine 27 is moved downward, and the dynamite insertion hole 33 is drilled in the pit 31 by the drill 28. Then, the drilling machine 27 is turned by the turning device 10 via the boom 17, and a dynamite insertion hole 33 is drilled at a predetermined position of the pit 31.

Next, when dynamite is inserted into the dynamite insertion hole 33 and the operation switch 8 is pulled up, the support cylinder 2 contracts, the support lift cylinder 3 subsequently contracts, and the support cylinder 2 is moved to the position 2A.
To rotate.

Then, after the entire apparatus is lifted and retracted, the pit 31 is crushed by dynamite.

Next, after the waste is carried out of the mine by means not shown, the apparatus is suspended again, and the procedure is repeated in the same manner as described above to excavate the hole bottom 31.

[0023]

According to the present invention, as described above, the apparatus can be automatically fixed to the pit wall without manual operation, and the workability and safety can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a front view showing a turning mechanism.

FIG. 4 is a front sectional view showing a pit bottom detecting means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Stand 2 ... Support cylinder 3 ... Support lift cylinder 4 ... Hydraulic unit 5 ... Oil reservoir 6 ... Cable reel 7 ... Hook 8 ... Operation switch 10 ...・ Swing mechanism 11 ・ ・ ・ Hydraulic motor 12 ・ ・ ・ Paul 13 ・ ・ ・ Bottom detection means 14 ・ ・ ・ Set rod 15 ・ ・ ・ Limit switch 16 ・ ・ ・ Yoke base 16a ・ ・ ・ Top hole 16b ・ ・ ・Lower hole 17 ... Boom 18 ... First swing cylinder 19 ... Second swing cylinder 20 ... Bracket 20a ... Arm 20b ... Boss 21 ... Pin 22 ...・ Bracket 23 ・ ・ ・ Swing cylinder 24 ・ ・ ・ Guide shell 25 ・ ・ ・ Vertical cylinder 26 ・ ・ ・ Rotating bit 27 ・ ・ ・ Drilling machine 28 ・ ・ ・ Drill 29 ・ ・ ・ Feed Drive motor 30 ・ ・ ・ Drilling pit 31 ・ ・ ・ Bottom bottom 32 ・ ・ ・ Downhole 33 ・ ・ ・ Dynamite insertion hole S ・ ・ ・ Screw rod

 ──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 592241261 Furukawa Drill Tech Co., Ltd. 2-6-1 Marunouchi, Chiyoda-ku, Tokyo (74) The above four agents Patent Attorney Toshitada Takahashi (one outside) (72) ) Inventor Kenji Osawa 9-15 Fukamachi, Aoba-ku, Sendai City, Miyagi Prefecture Inside the Tohoku Regional Construction Bureau River Department (72) Inventor Hachiro Ikeda 3-6-1 Sakuragi Tagajo City, Miyagi Prefecture Tohoku Region Construction Bureau Tohoku Technical Office (72) Inventor Yutaka Sakata 2-10-2 Otowa, Bunkyo-ku, Tokyo Inside the Advanced Construction Technology Center (72) Inventor Yoshihito Niino 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Masahiro Noguchi 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Naomichi Arai Sendai, Miyagi 1-27 Fukamachi, Aoba-ku Kashima Construction Co., Ltd. Tohoku Branch (72) Inventor Shinpei Mitsui 1-1-2 Taito, Taito-ku, Tokyo Fudo Construction Co., Ltd. (72) Inventor Yasuo Tsuda Tokyo 1-2-1 Taito, Taito-ku Fudo Construction Co., Ltd. (72) Inventor Shigeru Ishibashi 1-27-3 Nishigahara, Kita-ku, Tokyo Furukawa Drill Tech Co., Ltd.Examiner Toshiaki Nakamaki

Claims (1)

(57) [Claims] 1. A gantry suspended in an excavation pit by a lifting means,
A bottom detection means provided at a lower end of a pole vertically suspended from the base via a turning device to detect a bottom, a plurality of support cylinders having one end pivotally attached to an upper part of the base and suspended normally. A support lift cylinder that pivots the support cylinder to a horizontal position according to a detection signal from the downhole detection means, a boom pivoted at an upper end by the first pivot cylinder to the pivot mechanism, A guide shell pivotally attached to a lower end of the boom and swinging by a second swing cylinder and swinging by a swing cylinder; a screw rod guided by the guide shell and moved up and down by a vertical cylinder; and a lower end of the screw rod An excavator, comprising: a rotary bit provided in a portion; and a drilling machine screwed into the screw rod and fed by a feed motor.