JPS6340548Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drilling device for forming blast holes in rock and slits in already formed blast holes.

Conventionally, in the blasting method used in rock excavation for tunnels, for example, it is necessary to make the desired excavation surface as smooth as possible, that is, to form a rock surface with less roughness, or to generate cracks in a desired direction by blasting. For this purpose, slits are formed in the walls of blast holes drilled by drifters using water jet trans rods.
This slit is created by inserting a water jet transformer rod into holes drilled at intervals in the rock by a drifter, and gradually pulling it out while squirting water jet in a predetermined direction on the inner wall of the hole. However, this slitting work is carried out by another worker after the above-mentioned drifter has finished drilling the blast hole, which lengthens the process and is inefficient. However, if two workers were to perform the above two tasks next to each other, it would be extremely dangerous.

This invention was developed with the main purpose of solving these conventional problems, and after drilling one blast hole, it is necessary to drill the next blast hole and the drilled blast hole. The purpose of the present invention is to provide a drilling device that can perform the hole slitting operation in the same process and also allows the drilling interval of the blast holes to be arbitrarily selected. In a drilling device equipped with a drifter 2 that moves along a guide shell 1 as shown in FIG. The drifter 2 is connected by a holder 4 that can be bent and expanded in a direction perpendicular to the direction of movement of the drifter 2, and held so that the distance between both 2 and 3 can be adjusted.

More specifically, the drifter 2 is slidably attached to the guide shell 1, and the drifter 2 is slidably attached to the guide shell 1.
The tip of the rod 5 rotated by the guide shell 1 has a bit 6 at its tip, and the drifter 2 is caused to reciprocate in the length direction of the guide shell 1 by the drive section 7 to perform drilling. The guide shell 1 is an arm 10 that is pivotally connected to the tip of a boom 8 that is attached to a driving section 9 of a truck (not shown) via a universal joint 10'.
The boom 8 is supported by a cylinder 11 mounted between the driving part 9 and the side surface of the front end of the boom 8, and a cylinder 11 mounted between the lower surface of the front end of the boom 8 and the lower part of the driving part 9. It is supported by a cylinder 12 mounted on the cylinder 12, and can rotate angularly in the horizontal and vertical directions with the driving part 9 as a base point by mutual action of the cylinder 11 on the side surface and the cylinder 12 on the bottom surface. A cylinder 13 is provided between the upper surface of the front end of the boom 8 and the upper end of the arm 10.
is arranged so that the arm 10 can be vertically swung relative to the boom 8 about the fulcrum 14 by the operation of the cylinder 13, and the operation of these three cylinders 11, 12, 13 This allows the guide shell 1 to be positioned in the drilling direction. As is well known, the water jet transformer rod 3 has a nozzle head 15 at its tip and a water supply pipe 16 connected to its rear end. The guide shell 1 equipped with the above-mentioned drifter 2 and this water jet transformer rod 3 are held parallel to each other by a holder 4 that can be bent and stretched in a direction perpendicular to the moving direction (drilling direction) of the drifter 2 on opposite sides thereof. As shown in FIG. 1, displacement of only the drifter 2 side is allowed when the tip of the water jet transformer rod 3 is inserted into the opening of the previously drilled blast hole 17. In addition, the water jet transformer rod 3 is reciprocated together with the drifter 2.

Although the structure of this holder 4 is not particularly limited, in this embodiment, as shown in FIGS. , 19 respectively to fix the bracket 1.
8 and 19 to hold arms 20 and 21, respectively, and coupling arms 22 and 23 that extend toward the arms 20 and 21 on the front and rear end sides of the water jet transformer rod 3.
4, 25, and both arms 20, 22 facing each other.
and 21 and 23 are connected by links 26 and 27, respectively, through friction plates 28 and 28, and each connected portion is elastically pressed by means of a bolt 29, a nut 30, and a spring 31, so that a turning force greater than the elastic frictional force is generated. The holder 4 portion is configured to bend and expand when a force is applied, and each joint has the function of an actuator that can adjust so-called friction torque. And the collar body 2 on the rear end side
A fixed collar 32 is provided at the front position of the water jet transformer rod 3 , and a coil spring 33 is interposed between the collar body 25 and the fixed collar 32 . It absorbs the shock that occurs when the nozzle head 15 comes into contact with the end of the blast hole 17, and even when the nozzle head 15 comes into contact with the end of the blast hole 17, only the drifter 2 advances slightly, and drilling continues to a predetermined depth. It's becoming like that.

Next, the method of operation will be described. After drilling the first blast hole, the drilling device of the present invention is used. First, the nozzle head 15 at the tip of the water jet transformer rod 3 in the drilling device of the present invention.
positioning the water jet transformer rod 3 by inserting the part into the blast hole 17,
Next, operate the operating levers 34, 34 of the driving section 9 to operate the cylinders 11, 12, 13 to displace the boom 8 and arm 10, and place the bit 6 of the rod 5 of the drifter 21 at the position of the hole to be drilled. move it. At this time, since the tip of the lance rod 3 is located in the blast hole 17, the displacement of the boom 8 causes an external force on the holders 4, 4 that is greater than the frictional force that prevents the holders 4, 4 from bending and stretching. do,
The holders 4, 4 bend and extend, and only the guide shell 1 side moves to direct the bit 6 to a predetermined position, setting the guide shell 1 in the drilling direction. In this state, the lance rod 3 is not necessarily oriented in a direction parallel to the blast hole 17, but when the drilling direction of the guide shell 1 is determined and drilling is started and the drilling operation progresses, the lance rod 3 is also oriented toward the drifter 17. The nozzle head 15 advances along the inner wall surface of the blasting hole 17, and a force that corrects the lance rod 3 in the direction of the blasting hole 17 acts on the holders 4, 4, thereby causing the holders 4, When the nozzle head 15 reaches the end of the blast hole 17, the guide shell 1 and the lance rod 3 become substantially parallel. After the nozzle head 15 comes into contact with the end of the blast hole 17, the forward movement of the lance rod 3 is blocked, but the drifter 2 moves further while compressing the coil spring 33, and the blast hole 35 reaches a predetermined depth. form. When the blast hole 35 of a predetermined depth has been formed in this way, the handle 36 is operated to determine the water injection direction from the nozzle head 15, and the lance rod is moved from the water pipe 16 while the drifter 2 is retreated by the drive unit 7. When high-pressure water is fed into the lance rod 3, a jet water stream is ejected from the nozzle head 15 toward the side of the blast hole 17, and the rock is cut by the jet stream, and as the lance rod 3 retreats, the wall surface of the blast hole 17 is A slit is formed in the.

As described above, the present invention provides a drilling device equipped with a drifter 2 that moves along a guide shell 1, in which a water jet transformer rod 3 is disposed parallel to the drifter 2, and the water jet transformer rod 3 is arranged parallel to the drifter 2. The rod 3 is connected to the rod 3 by a holder 4 that can be bent and expanded in a direction perpendicular to the direction of movement of the drifter 2, and is held so that the distance between both 2 and 3 can be adjusted. Since the water jet trans rod 3 is configured to move back and forth, the tip of the water jet trans rod 3 is inserted into the previously drilled blast hole 17 as described above. Then, by displacing the drifter 2 with respect to the water jet transformer rod 3 via the holder 4, the distance between both 2 and 3 can be adjusted and the drifter 2 can be set at a predetermined position. After setting the position of the drifter 2, if the drifter 2 is moved forward to perform drilling, the lance rod 3 will also move forward into the existing blasting hole 17, and the lance rod 3 will advance into the existing blasting hole 17, and the lance rod 3 will move forward or after drilling by the drifter 2 is completed. A slit can be formed in the blast hole 17 by supplying high pressure water to the water jet trans rod 3 when the drifter 2 is retreating. Therefore, drilling a new blast hole and slitting the previous blast hole can be performed in the same process, shortening the process, improving work efficiency, and making it possible to perform both operations safely. It has many beneficial effects.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and
1 and 2 are a schematic plan view and a side view of the entire device, FIG. 3 is an enlarged plan view of the main part with some parts omitted, and FIG. 4 is a simplified side view of the bendable and extensible holder part. 1 is the guide shell, 2 is the drifter, 3 is the water jet transformer rod, and 4 is the holder.

Claims (1)

[Scope of utility model registration request] Drifter 2 moving along guide shell 1
A water jet transformer rod 3 is arranged in parallel with the drifter 2 in a drilling device equipped with the above, and the drifter 2 and the water jet transformer rod 3 can be bent and expanded in a direction perpendicular to the moving direction of the drifter 2. They are connected by a holder 4 and held so that the distance between both 2 and 3 can be adjusted, and the drifter 2
A drilling device characterized in that the water jet transformer rod 3 is configured to move back and forth as the water jet transformer rod 3 moves back and forth.