US3559750A

US3559750A - Supporting means for a mobile percussive rock drill for carrying out cylindrical cuts

Info

Publication number: US3559750A
Application number: US832923A
Authority: US
Inventors: Vladimir Mares
Original assignee: CESKOSLOVENSKY URANOVY PRUMYSL
Current assignee: CESKOSLOVENSKY URANOVY PRUMYSL
Priority date: 1968-06-19
Filing date: 1969-06-13
Publication date: 1971-02-02
Anticipated expiration: 1988-02-02
Also published as: GB1259559A; SE347045B; ZA694372B; FR2011242A1; AT286210B; CH496878A; DE1931189A1

Abstract

A percussive type rock drill is in the course of carrying out substantially horizontal holes for a cylindrical cut in the rock face supported by a support, which is suspended by means of suspension heads on both extremities of said support in cutouts of guiding grooves of a stable pattern fixed on the rock face and of an adjustable pattern mounted on a mounting pillar. Holes for the drill bit of the rock drill are provided above each cutout of said guiding grooves.

Description

I Un ted States Patent 1 1 3,559,750

[72] lnvcntor Vladimir Mares [50] Field of Search 173/32, 33, Pribram, Czechoslovakia 45 [21} Appl. No, 832,923 {22] Filed June 13, 1969 References C1tcd [45] Patented Feb. 2, 1971 UNITED STATES PATENTS I 1 Assignee w y l pwmysl 639,267 12/1899 Moss 173/32x gefleralm redltelsm 2,969,121 1/1961 Wallace... 173/33 Prlbram, Czechoslovak! 3,007,686 1 1/196] Pearson... 173/32x [32] Priority June 19, 1968 [33] Czechoslovakia Pnmary Exammer-Emest R. Purser 3 pv4509 A ttorney Arthur 0. Klein [54] SUPPORTING MEANS FOR A MOBILE ABSTRACT: A percussive type rock drill is in the course of PERCUSSIVE ROCK DRILL FOR CARRYING OUT carrying out substantially horizontal holes for a cylindrical cut CYLINDRICAL CUTS in the rock face supported by a support, which is suspended by 2 Chin, 5 Drawing Figs means of suspension heads on both extremities of said support in cutouts of guiding grooves of a stable pattern fixed on the [52] US. Cl 173/33, rock face and of an adjustable pattern mounted on a mounting l73/45 pillar. Holes for the drill bit of the rock drill are provided [51 Int. Cl E2lc 11/00 above each cutout of said guiding grooves.

lI-I' PATENTED FEB 2 m1 SHEET 2 [1F 2 INVENTOR: V/adim/Y MHRES ATTORNEY SUPPORTING MEANS FOR A MOBILE PERCUSSIVE ROCK DRILL FOR CARRYING OUT CYLINDRICAL CUTS BACKGROUND OF THE INVENTION This invention relates to a mobile percussive-type rock drill for carrying out cylindrical rock cuts of the kind, where for the guiding of the hammer drill performing a reciprocating movement along a support, a pattern is used for exact locating of the holes of the rock cut.

Actually used percussive-type rock drills with guiding patterns of sheet iron enable to anchor said pattern by using a prior drilled central hole, locating thus the remaining holes. Similar arrangements can be used for manual control of the operation only, whereby drilling of larger holes is rather troublesome.

SUMMARY OF THE INVENTION The subject invention is directed to improvements of supporting and guide means of similar percussive rock drills which would enable to drill a number of exactly parallel holes for a rock cut.

It is another object of this invention to enable an exact mechanical drilling by means of a power driven too], where the only manual work would be the adjustment of the tool for drilling a subsequent hole.

Other objects and advantages will appear from the following description of an example of the invention, when considered in connection with the accompanying drawings, and the novel features will be particularly pointed out in the appended claims.

DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevation of a percussive rock drill in partial longitudinal section as applied at the rock face,

FIG. 2 is a frontal elevational view of a stable drill pattern, said view taken in direction of the arrow a in FIG. 1,

FIG. 3 is a similar view of another drill pattern arranged on the opposite end of the drill support, said view taken in direction of the arrow b in FIG. 1,

FIG. 4 is a more detailed view showing in partial section the suspension of the suspension head of the drill support in the stable pattern,

FIG. 5 is a frontal elevation of a part of the stable pattern without the support.

DESCRIPTION OF PREFERRED EMBODIMENT Referring to FIGS. 1, 2 and 3 of the drawings in percussive rock drill comprises a substantially horizontal support I, supporting and guiding a reciprocating hammer drill 2 of common design and actuated by any of known driving means generating a reciprocating movement. The support I is provided on its both extremities with suspension heads 5 and 6 represented for instance by bolts with enlarged heads on their free ends. Said suspension heads are adapted to be suspended in a manner which will be described later, in two oppositely arranged

patterns

3 and 4. The pattern 3 made for instance of reinforced sheet iron is anchored in the rock face 7 by means of two anchoring bolts 8 and is secured against turning by two adjustable rests 9. The opposite pattern 4 is supported by an adjustable mounting pillar 10 provided with a number of openings II for a setting bolt 12. The pattern 4 is secured on the mounting pillar 10 by means of a bracket 40, to which it is fastened by a wing nut 13 at each side of the vertical plane of symmetry.

The stable pattern 3 is provided with a number of circular holes 14 distributed according to the required position or the bore holes of the rock cut and in addition with a guiding slot 15, provided with cutouts I6 inthe horizontal branches of said guiding slot 15, which has in the exemplary embodiment approximately the shape of the letter 2. These cutouts 16 are situated always below each circular hole I4. At both extremities of the guiding slot 15 are circular holes 17 for inserting and removal of the suspensions head 5 of the support I of the hammer drill 2.

The oppositely arranged pattern 4, the height of which is adjustable, has a similar guiding slot I8 as the pattern 3, which guiding slot 18 is a mirror image of the slot I5 of said pattern 3. Similar cutouts I9 corresponding to cutouts I6 of the slot 15 of pattern 3 are provided along the guiding slot 18 and equally circular holes 20 for inserting and removal of the suspension head 6 of the support of the hammer drill 2.

The drill steel 21 of the reciprocating hammer drill 2 has on its free extremity a drill bit 22, the external diameter of which is somewhat smaller than the internal diameter of sleeves 24 mounted firmly in the circular holes 14. The drill steel 21 is guided in said sleeves 24 by means of a bushing 23. In FIG. 2 both the bushing 23 and sleeves 24 are not shown, they can be however seen in FIG. 4 and 5.

The circular holes l7 and 20 of both

patterns

3 and 4 have a somewhat larger diameter than the width of the guiding slots 15, I6 serving for suspension and safe guidance of the suspension heads 5 and 6 of the support 1 of the hammer drill 2.

FIGS. 4 and 5 show in more detail the suspension of the suspension head 5 in the stable pattern 3 and the guiding of the drill steel 21 with the drill bit 22. The sleeve 24 is fixed to the pattern 3 by welding, the bushing 23 is provided with a longitudinal cut of a width surpassing the diameter of the drill steel 21 and with a handle 26 for manipulation.

The described structure operates as follows: Two short parallel bore holes for anchoring the anchoring bolts 8 are first drilled in the rock face. The stable pattern 3 is fixed to said bolts 8 and its position is secured against turning by the adjustable rests 9. The suspension head 5 of the support I of the hammer drill 2 is thereafter inserted into the circular hole I7 of pattern 3 and shifted manually in the guiding slot 15 up to the first cutout 16. The suspension head 6 at the opposite extremity of the support 1 is in a similar manner suspended in the second pattern 4 by inserting into the circular hole 20 and by shifting to the first cutout 19 of the guiding slot 18. The vertical and lateral position of the pattern 4 is thereafter adjusted by adjustment of the position and height of the mounting pillar I0 so as to coincide exactly and correctly with the position of the pattern 3. The hammer drill 2 is thereafter brought to operation to start drilling of the first bore hole 25, whereafter after there is sufficient guidance for the drill bit 22 the bushing 23 is retracted and removed and the boring of the hole 25 continued. When the boring of this hole 25 is finished the drill steel 21 with the drill bit 22 comes beyond the sleeve 24 of the hole 14 and the support I with the hammer drill 2 is manually shifted in the

guiding slots

15 and 18 of both

patterns

3 and 4 to the following cutout to proceed with boring of the next bore hole 25 until all required bore holes are finished.

It can be understood from the above said, that the required bore holes for the rock cut are bored mechanically and the only manual work of the attendant is the manual shifting of the support 1 of the hammer drill 2 with the drill steel 21 from one cutout I6 and 19 of both

patterns

3 and 4 to the next ones while maintaining an exactly parallel position of all bore holes even if said bore holes are very close together, say at distances of only four inches.

It is to be understood that the shape of the

patterns

3 and 4 are chosen in accordance with the required distribution of bore holes of the respective rock cut.

So far the rock cut has been designated as cylindrical rock out it should be understood that rock cuts of any shape are ineluded by this term so far the direction of all holes for this cut remain parallel, in difference to conical rock cuts.

I claim:

I. Supporting means for a mobile percussive rock drill for carrying out rock cuts comprising in combination:

a stable pattern of the shape of a vertical sheet provided with means for fixing on the rock face;

a second pattern provided with means for fixing on an adjustable mounting pillar;

said support provided with suspension heads at both extremities for suspension in the cutouts of the guiding slots.

2. Supporting means for a mobile percussive rock drill as claimed in claim I with inserting holes provided at least at both extremities of said guiding slots for inserting and removal of the suspension heads of said support of the rock drill into and from said guiding slots.

Claims

1. Supporting means for a mobile percussive rock drill for carrying out rock cuts comprising in combination: a stable pattern of the shape of a vertical sheet provided with means for fixing on the rock face; a second pattern provided with means for fixing on an adjustable mounting pillar; said stable pattern provided with circular holes at places where bore holes for the rock cut are required; a continuous guiding slot in both said patterns at equal distance below the centers of said circular holes; cutouts along said slot in both patterns at places corresponding to places below each of said circular holes, of said stable pattern; a support for the percussive rock drill; and said support provided with suspension heads at both extremities for suspension in the cutouts of the guiding slots.

2. Supporting means for a mobile percussive rock drill as claimed in claim 1 with inserting holes provided at least at both extremities of said guiding slots for inserting and removal of the suspension heads of said support of the rock drill into and from said guiding slots.