JPH02120496A - Slit former for rockbed - Google Patents

Abstract

PURPOSE:To permit a slit with smoothened inner surface to be formed with good efficiency by a method in which two pits are drilled in rockbed in a separated form in the width direction of frame by a drill rod and the rockbed between the pits is crushed by plate bit to form a slit-shaped hole. CONSTITUTION:A support claw 23 attached to the tip of a frame 2 is driven into and fixed to a rockbed 22, and a slide base 4 is moved to the tip side. Drill bits 11 on the tips of drill rods 9a and 9b are pressed on the rockbed 24 to operate a striker 5 and rotary strikers 10a and 10b. The base 4 is then moved to the tip side and two pits separated in the lateral direction from each other are formed. When a depth is reached, the rockbed 24a between the two pits is crushed by means of striking action of the tip of a plate-shaped bit 21 by an anvil 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for forming slit-like holes in rock (including concrete).

[Conventional technology]

The conventional rock slit forming device of this type is JP-A-Sho GO-
As shown in No. 5996, there is a slit forming device that uses multiple drills, and a new slit forming device that creates slits by drilling two or more holes in advance and crushing the space between the holes with a plate-shaped bit. There is something that is designed to form a .

[Problems to be solved by the invention]

In the conventional rock slit forming device described above, which simply drills multiple holes in advance and then crushes the spaces between the holes to form slits, the drilling depth of the holes drilled in advance is As the depth increases, the holes may become misaligned with each other due to the presence or absence of cracks in the rock or non-uniformity, which may prevent the formation of slits. Furthermore, on the surface where a slit is formed by crushing between a plurality of holes, large irregularities caused by the holes tend to remain on the inner surface of the slit, making it difficult to form a slit with a smooth inner surface. Furthermore, there were problems in that the drilling speed was slow and the structure of the device was complicated.

The present invention has been made in view of the above, and is capable of efficiently forming deep slit-like holes with a smooth inner surface, simplifying the structure of the slit-forming device, and furthermore, It is an object of the present invention to provide a rock slit forming device that can improve the cutting performance when forming slits.

[Means to solve the problem]

In order to achieve the above object, the rock slit forming device according to the present invention is provided with a sliding frame that is slidable in the longitudinal direction of the frame, which is supported on the arm of a construction machine so that it can be raised and lowered, and Drill rods with drill bits attached to their tips are spaced apart in the width direction of the frame and slidably supported on a sliding frame, and a tubular rod guide is provided from the tips of both drill rods to the vicinity of their base ends. At the same time, the middle parts of both rod guides are connected to each other with a reinforcing member, and the base ends are fixed to the sliding frame, and a plate-shaped bit is installed at the tip between the two drill rods. The fixed plate is supported at its intermediate portion on the frame so as to be slidable in the longitudinal and width directions of the frame, and its base end is supported on a sliding frame so as to be swingable in the width direction. A rotation/impact means is connected to the base end of each of the drill rods, and is supported by the sliding pedestal and rotates and hits each drill rod, and the sliding pedestal is connected to the base end of the plate. The frame is supported by a swinging and striking means that swings and strikes the plate in the width direction of the frame.

[For production]

By moving the sliding pedestal to the tip side of the frame while driving the rotation/impact means and the swing/impact means, two holes spaced apart in the width direction of the frame are drilled into the rock using a drill rod. The rock between the two holes is crushed with a plate-shaped bit to form a slit-like hole with the width between the two holes.

At this time, both drill rods are supported by rod guides fitted thereto, thereby increasing their rigidity.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

In the figure, 1 is an arm provided on a construction machine (not shown) so that it can be raised and lowered, 2 is a frame supported at the tip of this arm 1 so as to be rotatable in the vertical direction, and 3 is a cylinder device that rotationally drives this frame 2. .

A sliding mount 4 is slidably mounted on the upper surface of the frame 2, and the sliding mount 4 is configured to slide in the front-rear direction along the frame 2 by a drive device (not shown). Reference numeral 5 designates a striking device supported on the sliding frame 4 via a bracket 6, and 8 designates an anvil thereof. 9a, 9b
are spaced apart in the width direction of frame 2, and are parallel to frame 2
The base end portions of both drill rods 9a and 9b are a rotation/impact device 10a supported on the sliding frame 4.

10b, and a drill bit 11 at the tip.
．． 11 is fixed. Also, both drill rods 9a
, 9b are fitted with tubular rod guides 12a, 12b extending from the distal end to the vicinity of the proximal end of the drill rod 9.
a, 9b are supported by the rod guides 12a, 12b. Then the rod guide 12a.

The proximal end of the drill rod 12b is fixed to the sliding frame 4, and is fixedly supported by proximal supports 13a and 13b that slidably support the proximal ends of the drill rods 9a and 9b, and this rod guide 12a and 12b are connected and fixed to each other by reinforcing members 14 and 14 at the tip and middle portions. Further, the distal ends of both rod guides 12a and 12b are slidably supported by a distal end support 15 fixed to the distal end of the frame 2.

Reference numeral 16 denotes a plate located between the drill rods 9a and 9b, and the distal end of the plate 16 is supported by the distal end support 15 so as to be slidable in the width direction and longitudinal direction of the frame 2.

The base end of the plate 160 is slidably supported by the swing support base 17 over a predetermined stroke in the longitudinal direction, and the base end of the plate 16 is connected to the striking device 5.
is opposed to the tip surface of the anvil 8. The swing support stand 17 is swingably supported by the sliding frame 4, and a swing arm 18 is fixed to the swing support stand 17 toward the base end. Two cylinder devices 19a and 19b, which are provided on the sliding frame 4 and facing each other in the width direction of the frame 2, are connected to the tip. The contact surfaces of the plate 16 and the anvil 8 are arcuate with the pivot point of the pivot support table 17 as the center. A plate-shaped bit 21 with a carbide tip 20 implanted at the tip of the plate 16
is fixed. This plate-shaped bit 21 is the drill bit 11. ．． It is arranged so that it is in a position slightly retreated toward the proximal end side from 11.

A support claw 23 is attached to the tip of the frame 2 so that the frame 2 bites into and fixes when the frame 2 is pressed against a bedrock 24.

In the above configuration, the striking device 5 and the rotation/striking N device 10
a. When IQb is activated, the drill bit 11.11
While being rotated, a percussion action is applied. Further, the plate-shaped bit 21 is subjected to a striking action by the anvil 8.

This plate-shaped bit 21 has cylinder devices 19a, 19
By operating b, both drill rods 9a and 9b are moved by 141 via the swing support base 17. The trill bits 9a, 9b and the plate-shaped bit 21 are moved forward and backward along the frame 2 by the 1n moving rack 4.

At this time, the rod guide 12a is fitted to both drill rods 9a and 9b.

The drill rods 12b are advanced and retracted through the proximal supports 13a and 13b in the same positional relationship as the drill rods 9a and 9b.

Therefore, the drill rods 9a and 9b during the above operation are as follows:
The rod guide 1 extends from the distal end to the vicinity of the proximal end.
2a and 12b, and both drill rods 9
a.

The position of 9b in the spacing direction is both guide rods 12a.

It is supported by a reinforcing member 14.14 connecting 12b.

The operation of forming a slit-shaped hole in a rock using the above-mentioned apparatus will be described below.

While moving the construction vehicle forward, arm 1 and frame 2
A support claw 23 attached to the tip of the frame 2 is bitten into the bedrock 22 and fixed at a portion where a slit-like hole is to be formed by undulating the frame. Next, the sliding frame 4 is moved to the tip side and the drill bit 1 at the tip of the drill rods 9a and 9b is moved.
1゜11 is pressed against the rock 24 and the striking device 5 and the rotating
The striking devices 10a, 10b are activated.

As a result, the drill bit 11.11 is rotated and hit, thereby crushing the rock 24. Further, along with this operation, by moving the sliding frame 4 toward the distal end, two holes spaced apart laterally are formed by both drill bits 11.11. When the hole made by this drill bit 11.11 reaches a certain depth, the plate-shaped bit 2
The tip of the bit 1 hits the rock 24a between the two holes, and in this state, the plate-shaped bit 21 is swung in the width direction of the frame 2 and a striking action is applied by the anvil 8. , the rock mass 24a between the two holes is crushed.

Due to the above operation, both drill bits 11 and 11 hit the rock 24.
A slit-like hole with a length of interval of , and a smooth inner surface is formed. At this time, drill bit 11.1
1 and the plate-shaped bit 21 are each struck independently to ensure good transmission of the striking force, and the formation of the grooved hole described above is performed smoothly and efficiently. Also, the striking device 5
Since it only does the work of the plate-shaped bit 21,
The anvil 8 of this striking device 5 is small and lightweight, and the striking force transmission section is small.

During the above operation, the drill rod 9a.

As described above, the axial impact force and rotational torque act on the drill rod 9b.

The rod guides 12a, 12b support the rod guides 12a, 12b from the distal end to the vicinity of the proximal end of the rod guides 9b, and the distal end and intermediate portions of the rod guides 12a, 12b are connected to each other by a reinforcing member 14.14. As a result, even when deep excavation is performed by moving the sliding frame 4 forward greatly and causing the drill rods 9a, 9b and the plate-shaped bit 21 to protrude in a large overhang shape toward the distal end side from the distal end support 15, both drill rods Since the deformation of the drill rods 9a, 9b is prevented, the distance between the drill rods 9a, 9b) does not change, and the normal distance is always maintained, so that no drilling remains by the plate-shaped bit 21 occurs. Similarly, drill rod 9
a %9b also increases the rigidity in the vertical direction, so that even if the surface of the rock 24 is inclined in the front-back direction with respect to the drilling axis, for example, as shown in FIG. The rods 9a and 9b do not run away in the direction of inclination, as shown by diagonal lines, and are maintained in their normal postures, as shown by solid lines, so that a good cut can be made (1).

3 and 4 show other embodiments of the invention.

That is, cutouts 25a, 25 are formed in the side surfaces of the tip ends of the drill guides 12a', 12b' fitted into the drill rods 9a, 9b, in the portions facing the plate-shaped bits 21'.
b is provided, and arc-shaped notches 26a, 26b are provided on both sides of the plate-shaped bit 21', facing the drill rods 9a, 9b, so that both drill rods 9a,
The clearance S2 for swinging the plate-shaped bit 21' between 9b is the clearance S2 when the above-mentioned two notches 25° 26 are not present.
It is larger than l.

In this embodiment, the swinging width of the plate-shaped bit 21' is widened, and the rock between the holes by both drill rods 9a and 9b is drilled without leaving any unexcavated parts on both sides of the plate-shaped pit 21'. can do. Also, when drilling with the drill rods 9a and 9b, the rod guide 12a'
Air is blown out from the notch 25 of the notch 12b', causing a so-called air fluffing phenomenon, and the opening formed by the notch 25 is prevented from being clogged with milling powder.

〔Effect of the invention〕

According to the present invention, a deep slit-like hole can be efficiently formed with a smooth inner surface, the configuration of the slit-forming device can be simplified, and furthermore, it is possible to form a deep slit-like hole efficiently and with a smooth inner surface. The cutting performance can be improved. In particular, according to the present invention, the drill rods 9a, 9b are supported by tubular rod guides 12a, 12b, 12a', 12b', thereby significantly increasing the rigidity during drilling.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view;
FIG. 2 is a partially cutaway side view, FIG. Figure 4 is a plan view, Figure 5 is the V of Figure 4.
A cross-sectional view taken along the line -■, and FIG. 6 is a side view showing a perforated deaf when the surface of the rock is inclined. 1 is the arm, 2 is the frame, 4 is (n moving frame, 9a, 9
b is a drill rod, 11 is a drill bit, 12a, 12
b is an o rad guide, 16 is a plate, and 21 is a plate-shaped bit. Applicant Komatsu Manufacturing Co., Ltd. Representative Patent Attorney Masaaki Yonehara

Claims (1)

[Claims] A sliding pedestal 4 is provided on a frame 2 that is movably supported by an arm 10 of a construction machine so as to be slidable in the longitudinal direction of the frame 2, and drill rods 9a and 9b each having a drill bit 11 attached to the tip thereof are mounted on the frame 2. Tubular rod guides 12a, 12b are inserted from the distal ends of both drill rods 9a, 9b to the vicinity of their proximal ends. At the same time, the intermediate portions of both rod guides 12a and 12b are connected to each other by a reinforcing member 14, and the base end portions are connected to the sliding frame 4.
and between both the drill rods 9a and 9b,
A plate 16 having a plate-shaped bit 21 fixed to its tip is supported at its intermediate portion by the frame 2 so as to be slidable in the longitudinal and width directions of the frame 2, and its base end is supported by a sliding mount 4. Supported so that it can swing freely in the width direction,
A rotating/impacting means supported by the sliding frame 4 and rotating and hitting each drill rod 9a, 9b is connected to the base end of each of the drill rods 9a, 9b, and a base end of the plate 16 is connected to the base end of the plate 16. A rock slit forming device characterized in that a swinging and striking means supported by the sliding frame 4 and swinging and striking the plate 16 in the width direction of the frame 2 is connected thereto.