JPS6135356B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a raise drill for pilot down and reaming up.

Generally, when using a raise drill to drill a vertical shaft for various purposes in the rock that separates two mine shafts,
The method used is to first drill a pilot hole, penetrate the hole, and then use the hole as a guide to ream up in the opposite direction using a reaming bit with a larger diameter than the hole.

In this case, as shown in FIG.
In a conventional raise drill with a rod chuck 5 attached to the lower part of the drill rod, when performing a pilot down cycle and a reaming up cycle while continuously adding and removing drill rods 9, the drill rods 9 are added and removed midway between the rod holder 4 and the rod chuck 5. Therefore, when the height of the machine is limited by the height of the tunnel, there is a limit to the length of the drill rod 9, and it is necessary to frequently add and remove the drill rod. As a result, the work was troublesome and construction efficiency was poor.

The present invention has been made based on the above-mentioned circumstances, and it is an object of the present invention to provide a raise drill in which the pilot down cycle and reaming up cycle of the raise drill are streamlined and operations can be carried out effectively.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 2 is a front view illustrating a raise drill according to the present invention. The raise drill 1 consists of a base part 2 and a drill head part 3, and the base part 2 is provided with a rod holder 4. As shown in FIG. Further, the drill head portion 3 is provided with a spindle 10 and a rod chuck 5 on the top thereof.
A drill rod 9 passes through it and extends upwardly. The drill head section 3 is attached to the base section 2 by a piston rod 6 and a travel cylinder 7 so as to be able to move up and down.

The raise drill 1 has a vertically extending hollow drill rod 9, which is equipped with a bit (not shown) at the bottom and connected via a water swivel 8 to a hose that supplies cutting fluid through a high-pressure pump (not shown) to the top. It is inserted.

The drill rod 9 is connected to the rod chuck 5 of the drill head part 3 and the rod holder 4 of the base part 2.
being held.

Further, the drill head 3 has a drill rod 9.
A hydraulic motor and gears (not shown) for transmitting rotational force and propulsive force are attached to the spindle 10, and the required driving force is applied to the spindle 10.

The construction order of the pilot down cycle and reaming up cycle using the raise drill 1 configured as described above will be explained.

3 to 8 are front views showing the construction order of the excavation system.

Attach the pilot to the tip as shown in Figure 3,
Several hollow drill rods 9 are connected and held by a rod chuck 5 of the drill head 3 and a rod holder 4 of the base 2. A water swivel 8 is attached to the upper end of the top stage of the drill rod 9.
are connected.

First, the drill rod 9 is gripped by the rod chuck 5, and then the rod holder 4 is opened. Therefore, as shown in FIG. 4, a hydraulic motor attached to the drill head 3 is driven to rotate the drill bit at the tip, and the travel cylinder 7 and piston rod 6 contract to lower the drill head 3 and perform drilling. Next, the drill head 3 is raised along a guide frame (not shown) as shown in FIG. At this time, the rod chuck 5 of the drill head part 3 releases its grip on the drill rod 9, and the rod holder 4 of the base part 2 releases its grip.
grips the drill rod 9, and the travel cylinder 7 and piston rod 6 extend and rise. Next, as shown in FIG. 6, when the second drilling is performed, the drilling for one drill rod is completed.
In this state, a new drill rod 9 is added as shown in FIGS. 7 and 8, and the pilot down cycle is then continuously performed.

Next, after the hole was drilled into the adjacent tunnel, the pilot bit was replaced with a reaming bit.
Perform reaming up cycle. The reaming up cycle is the reverse of the pilot down cycle, and is performed by rotating the drill rod 9 and extending the travel cylinder 7 and piston rod 6 to pull up the drill head.
After reaming up one drill rod, as shown in Fig. 9, the drill rod 9 is gripped by the rod holder 4 of the base part 2, and the rod chuck 5 of the drill head part 3 is held by the hydraulic motor (not shown). ) is rotated in the opposite direction to loosen the connecting screw, then the drill rod 9 is removed as shown in FIG. 10, and the reaming up cycle is then continued.

As explained in detail above, conventional boring machines for pilot down and reaming up, that is, raise drills, add and remove drill rods between the drill head and the base, and perform pilot down or reaming for one drill rod. The lifting work was done in one stroke. However, according to the present invention, a rod chuck is attached to the upper part of the spindle of the drill head portion, and the rod chuck and the rod holder of the base portion are inserted to hold the drill rod, thereby producing the following effects.

(1) Conventional raise drills could only use a drill rod with a length equal to the final stroke of the machine, but with this invention, a drill rod with a length that is an integral multiple of the machine stroke can be used. Therefore, since the height of the machine can be lowered and a longer drill rod can be used, the number of times the drill rod needs to be added and removed can be reduced, and the work speed can be increased.

(2) Also, in the conventional device, the driving force was transmitted by a rod chuck at the bottom of the drill head, but in this invention, the drill rod is inserted through the hollow part of the spindle, and the drill chuck grips the upper end of the rod to transmit the driving force. Therefore, compared to the conventional raise drill, which has a shorter length to hold the drill rod,
In this invention, since the rod is held within the spindle through which it is inserted, the guide portion is long and has the effect of suppressing the swinging of the rod during operation.

[Brief explanation of the drawing]

Figure 1 is a front view of the main parts of a conventional raise drill.
FIG. 2 is a front view of essential parts showing an embodiment according to the present invention, and FIGS. 3 to 10 are explanatory views of the construction method according to the present invention. 1...Raise drill, 2...Base part, 3...
Drill head section, 4... Rod holder, 5... Rod chuck, 6... Piston rod, 7... Travel cylinder, 8... Water swivel, 9...
...Drill rod, 10...Spindle. 〓〓〓〓〓

Claims (1)

[Claims] 1. A drill head is attached to a base so that it can be raised and lowered by a travel cylinder and a piston rod, and a rod chuck is attached to the upper part of the hollow spindle in the drill head, and a rod holder is attached to the base, and when connected, they are spaced at equal intervals. , and approximately 1/integer of the lifting length of the drill head
1. A raise drill characterized in that a drill rod having flat gripping surfaces at several locations is inserted through the rod chuck, spindle and rod holder.