LU79806A1 - CUTTING HEAD EQUIPPED WITH FELLING CORNERS OF ROCK REDANS - Google Patents

Description

LU 1551

GRAND DUCHY OF LUXEMBOURG

6 ^ ..... ** *** ................. Mr. Minister for National Economy

Title issued ---------------------------------- 3¾¾¾ Industrial Property Service,

____ LUXEMBOURG

^ Application for Patent of invention I. Request ........ Monsieur- Michal. PïîB.0IS., ... 6.,. ..avenue ..d.u Bois d´Eongrëe, 1460 -ITTFE - Belgiq'iiè5 - v ....... represents by-Monsieur A; Zewen-, ing. “Coassil" in propriety iïi'düStrielTe, .....

'....... acting in -quality. of agent ................................... .................................................. .................................. W

DEPOSIT ........ this ....... thirteen June 1900 seventy-eight .......................... ................................ (3) at .... 15 ° 0 ....... .. hours, at the Ministry of National Economy, in Luxembourg:,.

1. the present request for obtaining a patent for an invention concerning: ........- 'Cutting head ·· fitted with felling wedges-ranshes of roehes -'- .. ......................... ^ declares, assuming responsibility for this declaration, that The inventor (s) is (are): ....... Mr "... Michel. DUBOIS, 6 -avenue duBois ^ d'Hongrse, - · 1460- IÏTRE ^ -Belgqque ............. (5Î 2. the delegation of power, dated ....... Ittre .............................................. on .. ... June 6, 1978 ...............

3. the description in _________ French language ............................... of the invention in two copies; ! 4. 14 ................ drawing boards, in two copies; i 5. the receipt of the taxes paid to the Luxembourg Registration Office; '' ....... 13 June 1978 ................-..................... ...................... ............................ ........................-......................... ..............................................

! claims for the above patent application the priority of one (s) application (s) of I (g) / ......................... .................................. filed in (7) ........ . / ................................................ ..................................................

the , . .................................................. ..................; ............ (8); ....................... / .......................... ......................

on behalf of ............. y ................................. .................................................. .................................................. .......'.......................................... .... (9) -4 elect domicile for him / her and, if appointed, for their proxy, in Luxembourg ....................... ..........

"................................................. ................... 4 place Winston Churchill ........................... ............................................: ..... ... dO) requests the issue of an invention patent for the subject described and represented in the abovementioned appendices, - with postponement of this issue to i £ ............. ........... months.

Le-majiataire ....................

H dd. II. Minute of deposit rfïa aforesaid request for patent of invention was deposited with the Ministry for National Economy, Service dia Industrial Property in Luxembourg, on: * __13 June 1978 - / • ^, 0 pr. the Minister of National Economy, at 1.5.?.? hours / /? JtH \ "% Y \ / V * _ / f £% \ '·. The Head of the Department of Industrial Property, ujc ft ÎF i / Λ 68007' / // / i ί i l i ^

I

l

i * DESCRIPTION MEMORY

I 1 ....... · "" "..........." "";> I filed in support of a request for

PATENT

| at i

! LUXEMBOURG

1 Formed by: Mr. Michel DUBOIS

Avenue du Bois d´Hongrée, 6 | 1460 ITTRE (BELGIUM) for; "Cutting head equipped with corners for felling rock steps" t! I 1 The present invention relates to a cutting head driving i | felling corners of steep rock steps.

! It is known to use tools in the form of wedges to break up steps of mineral materials, isolated by the digging of a groove. These tools are produced in various ways but, still, they exert their thrust by taking support on the cutting head which carries them, the direction of j this thrust being, according to the embodiments, substantially radial or parallel to the axis of rotation of the head.

• ^ 10 Such a provision is acceptable when it is a question of burning soft rocks, such as coal for example,,] but, if it is a question of breaking hard rocks, the force necessary being more effective in pushing is much more; important and, therefore, its action is detrimental to the proper functioning of the cutting head which tends to veil or jam. On the other hand, these tools, rigid or rolling, are fixed on a side of the cutting head and can only act on this side. Finally, they cannot be erased when necessary.

The cutting head equipped with mobile rock-cutting wedges according to the invention eliminates these various drawbacks.

In general, the cutting head according to the invention comprises at least one housing, open from one side to the other, and, in this housing, a movable corner, as well as means for ensuring the driving of the corner and allowing it to move in a direction approximately perpendicular to the cutting plane. This corner is supported on the massif by one of its faces, while, by the other face, it exerts its thrust against the rock step to break .

In an embodiment adapted to a particular case, the wedge consists of two jaws articulated around a pivot, of substantially radial direction, and a radial sliding spacer of variable width, the "widest part of which is intended to be introduced between the two jaws by centrifugal force, i When the wedge is to be cleared, a tray, carried by a

Ides bearings and sliding parallel to the axis of rotation, is pushed by single-acting cylinders, also por-I ted by this bearing, against the arm of a bent lever apparently? h0 nant at the cutting head. The tilting of the angled lever 2 X allows to extract, by means of its other arm, the widest part of the retractor out of the jaws of the corner.

If the centrifugal force is insufficient to introduce 1 spacer between the jaws of the corner, the cylinders are dou-5 hlo effect and ensure the introduction as the removal of 1 spacer.

The appended figures, by way of example only, will allow a better understanding of the nature and operation of the cutting head according to the invention.

Fig.l shows a cutting head according to the invention working in undercut, plan view; 1 Fig.2 shows a cutting head according to the invention, seen in profile; * Fig.3 to 8 each show a different embodiment of the movable corner according to the invention, seen in plan; | | Fig, 9 shows a cutting head insulating steps, plan view;

Fig.10 shows an embodiment of the cutting head according to the invention, partial section, front view; 20 Fig. 11 is mie plan view of a corner in the open position; Fig.12 shows the corner of Fig.11 in the open position, seen from the front;

Fig.13 shows the corner of Fig.11 in the closed position, seen in plan; Fig. 14 shows the corner of Fig. 11 in the closed position, seen from the front;

Fig.15 is a side view of a bent lever raised by the spacer and Fig.lô shows, also in profile, the bent lever lowering the spacer of Fig.15; Fig.17 shows another embodiment of the cutting head according to the invention, partial section, front view;

Fig.18 is a profile of a bent lever raising the spacer and Fig.19, also in profile, the bent lever lowering the spacer of Fig.18.

! In these figures, the same reference notations designate i: identical elements.

Fig.l shows, in plan, the cutting head l, disc-shaped, fixed perpendicularly at the end of the shaft on the shaft 2 which rotates in the bearings 3 "In the head 1 is cut the 4θ housing h which the crosspiece from one side to the other. The pivot 6, i 3 1 of approximately radial direction, is fixed in the housing h. On the pivot 6 is articulated the corner 5 "wider than the cutting head 1, which 'it can overflow on each side' By pivoting slightly around the pivot 6.1th corner 5 moves sui-5 in a direction approximately perpendicular to the plane of symmetry of the cutting head 1.

The cutting head 1 operates undercut and isolates the step 10. The face 7 of the corner 5 follows the shape of the front against which it is located; the other face 8 of the corner 5 is in contact with the step 10. By its face 7 * 1 © corner 5 is supported on the block 9 to exert a thrust on the step 10 and break it. Due to the very high resistance of the solid 9 "the thrust on the step 10 can be significant; it occurs without dangerously requesting the cutting head l, on which the wedge 5 is not supported, and whose role is limited to ensuring the drive and the penetration of the wedge.

This way of working satisfies the conditions imposed by the destruction of the steep rock steps "<

The cutting head 1 can obviously be equipped with several corners such as 5 "

Fig.2 shows, in profile, another cutting head 1, also disc-shaped, wedged on the shaft 2, and rotating between the bearings 3 "The head 1 carries several corners such as the corner; mobile 5tplaced in the housing ^ .The housing k also crosses 25 if the head 1 from one side to the other. The corner 5 is held, dragged and guided by the external bars 27 which allow it a limited displacement perpendicularly at the plane of symmetry of the head 1.

'Fig.3 shows, in plan, the corner 5 of Fig.2 whose face 7 s' 30 is supported on 1 © massive 9 to dislocate the step 10. The I tenons 29 limit its movement.

ij In Fig. hf the corner 5 is crossed by the buttonhole 30.

IA inside this buttonhole 30, the bars 28 fulfill the same functions as the bars 27 shown 35 in Fig. 2 and 3 · t * Figs 5 to 8 show other embodiments of the corner 5 according to the invention.

The corner 5 of Fig.5 can slide between two faces 32, cy-? lindric and concentric, housing ^ "qiAi lead it

JtO and guide him. He wears 29 studs which take place in

L

k 1 the grooves 31. The width of the grooves 31 fixes 1 * the extent of the possible displacement of the corner 5 * ha face 7 of the corner 5 follows the concave shape of the massif 9

The corner 5 of Fig.6 is articulated around the pivot 6, like the s! 5 corner 5 of Fig. 1. Instead of resting on a conical front, it rests on a flat face of the block 9 · j Corner 5 of Fig. 7 has two jaws 11 and 12 articulated around the pivot 6. The jaw 11 is provided with a spacer 13 consisting of a screw which adjusts the opening of the jaws; 10 choirs.

I "* j The corner 5 of Fig.8 also includes two jaws 11 • I> 1 and 12 articulated around the pivot 6 but the spacer 13 consists of a heel belonging to the jaw 11.

The face 7 of the jaw 11 carries rollers Lh and the face! 15 this 8 of the jaw 12 carries rollers 15. The contact of the jaw 11 with the block 9 is made by means of the rollers 14 and the contact of the jaw 12 with the reif dan 10 is made by the intermediate of the rollers 15.

In all the embodiments, the corner 5 can be shaped according to the shape of the surfaces with which it is in contact and its faces 7 and 8 can be equipped with rollers 14 and 15.

In all the embodiments, the corners 5 are supported on the block 9 by their face 7 (or their rollers 14) I 25 and, by lexir face 8 (or their rollers I5) "they exert a j I weighed on the step 10 and bi'isent.

When the cutting head 1 digs deep grooves j which insulate rock steps (Fig. 9), the thickness of these; 30 steps may be such that they do not disintegrate spontaneously, The use of felling corners is then necessary, j However, the first groove dug in the front of the gallery does not isolate step because its two walls belong to the massif. During the digging of this initial groove, the wedge, useless and harmful, is therefore to be avoided.

On the other hand, it is advantageous to start the digging of the grooves by the digging of the most important groove,! which is the central groove in the case of a semi-circular gallery, From the second groove we isolate a re- ^ 0 dan but, depending on whether we are progressing towards a wall 1 5 1 of the gallery or the other, the corners should act to the right or to the left of the cutting head. The cutting head shown in Fig. 10 meets these various requirements.

The corner 5 which equips it consists of two jaws 11 and 5 12, movable around the pivot 6 (Fig. 11 and 13). In the radial slot 33 (Fig. ÎO) is housed the spacer 13, comprising a head thin 16 and a wider body 17 · When the cutting head is! stopped, the thin head 16 of this spacer 13 is engaged between 0 the jaws 11 and 12 and the width of the wedge is then slightly less than that of the cutting head 1 but, when the cutting head is in rotation, the centrifugal force pushes the housing towards the periphery, and it is the body 17, wider I than the head 16, which is introduced between the jaws 11 and 12.

! In this situation, (Fig. 11 and 12), the corner 5 is open, it extends beyond the width of the cutting head; by means of the rollers l ^, its face 7 is supported on the block 9 and, by means of the rollers 15, its face 8 exerts a thrust; on step 10 which it breaks.

; The spacer 13 is guided with sufficient play to allow I 20 all the necessary displacements of the corner 5 · Α at its upper part: it is engaged in a cutout made in the plate as at its lower part, it is maintained in the way that! The corner 5 therefore has the freedom to overflow on one side or the other of the cutting head 1.11 overflows-25 ra always automatically in the direction of the least resistance, i.e. to the left, when the grooves are cut from the center of the gallery to the right wall, and the grooves appear to the left of the cutting head, and, conversely, to the right when the progression takes place from center to the left and the steps appear to the right of the head.

The wedge erasing device 3 consists, on the one hand, of members carried by one of the bearings 3 and, on the other hand,! by members belonging to the cutting head.

35 One of the bearings 3 is provided with guides 26 parallel to the axis I of rotation of the cutting head and cylinders 18, single acting, I also parallel to the axis. A plate 19, perpendicular to the axis , carries rods 20 which slide in the guides 26 of the bearing 3- * kO On the cutting head l, an articulated lever 21 is articulated. The arm 6 1 22 of the lever 21 is in contact with the plate 19 and the another arm 23 is engaged in a slot Zh, situated at the base of the retractor 13. Stops 3 ^ are placed on the arm 23 to limit to what is necessary the freedom of movement of the lower part of the retractor 13 "

When the pistons of the jacks 18 are retracted, 1 * spacer 13 (Fig, l5)> moved by centrifugal force, lifts the arm 23 of the bent lever 21, the arm 22 of which pushes the plate 19 towards the bearing 3 "In this situation , The spreader opens the jaws 10 11 and 12 of the wedge 5 and the latter can operate on the right or on the left of the cutting head (Fig. 11 and 12). On the contrary, if 1 '. the pistons of the cylinders 18.1e plate 19 are brought out re pushes the arm 22 of the bent lever 21 (Fig.l6) which swings, and the arm 23 of which recalls the spacer 13 towards the axis of rotation 15 while simultaneously extracting time the body 17 out of the jaws 11 and 12. The corner 5 is therefore closed (Fig. 13 and 14), it no longer extends beyond the width of the cutting head 1 and the latter can undertake the digging of a first groove without the corner being an obstacle.

When the centrifugal force is not sufficient to introduce the body 17 of the spacer 13 between the jaws 11 and 12 of the wedge 5, the cutting head according to the invention is slightly different from that of FIG. 10 and it is carried out in accordance with FIG. 17 which shows a partial section, front view, of the cutting head 1.

As in the cutting head of Fig. 10,1 'coulis-i sant spacer 13 can open or close the jaws 11 and 12 of the corner 5 by introducing between these jaws its body 17 or its head 16 but the control of the opening and erasing of the corner 3® 5 is carried out in a particular way.

The bearing 3, provided with guides 26 parallel to the axis of rotation of the cutting head, is also provided with jacks 18, acting parallel to the axis, and which are double-acting in this embodiment. , perpendicular to the axis, has a flange 35 and rods 20 which slide in the guides 26 of the bearing 3 ·

On the cutting head 1 is articulated the bent lever 21. The arm 22 of the lever 21 is in contact, either with the plate 19 (Fig. 17 and 19), or with the flange 35 (Fig. 18), and the another ^ 0 arm 23 is engaged in the slot zh, situated at the base of the housing 7.

When the pistons of the jacks 18 are returned, the rim 35 of the plate 19 (Fig. 18) is driven towards the bearing 3 1 © arm 22 of the elbow lever 21 whose arm 23 raises the spacer 13 · 5 In this situation, 1 the spacer opens the jaws 11 and 12 of the corner 5 (Fig. 11 and 12).

On the contrary, if the pistons of the jacks 18 are brought out, the plate 19 pushes the arm 22 of the bent lever 21 (Fig.19); which rocks, and whose arm 23 recalls the spreader 13 towards | 10 the x-otation axis by simultaneously extracting the body 17 out! "of the jaws 11 and 12 of the corner 5 (Fig.13 and 1¾).

i]> In the two embodiments of Figs. 10 and 17, the retractor engagement and disengagement operations are possible because they are carried out when the cutting head does not work.

: The cutting head according to the invention, equipped with movable corners | stepping, steerable and erasable, is therefore able to meet all the requirements of the cutting process.

20 It is obvious that the invention is not exclusively limited to the embodiments described and that many modifications can be made in the form, arrangement and constitution of certain elements involved in their realization, provided that these modifications do not 25 are not inconsistent with the object of each of the following claims.

i j i i) i i

Claims (8)

8! - 1. Rock cutting head fitted with a j-felling wedge, characterized in that it comprises an open housing from one side to the other, in which the wedge, which is movable, is placed, as well as means ensuring the drive of the wedge and allowing it to move in a same direction substantially perpendicular to the cutting plane, and in that the wedge protrudes on either side of the cutting head, on one side in leaning on the massif, on the other side by exerting its push against the step of rocks to break. I * j 2. Cutting head according to claim 1, characterized in that one of the faces of the wedge has a shape which allows it to follow the shape of the block with which it is intended to be in contact. 3. Cutting head according to either of Claims 1 i j or 2, characterized in that the movable corner carries rollers j on its contact faces with the rock. U - Cutting head according to either of Claims 1 to 3, characterized in that it comprises a pivot, of substantially radial direction, around which the movable corner can rotate. i 5. Cutting head according to claim ktcaractérisée in that] the movable corner consists of two jaws articulated j] on the pivot, as well as a radial sliding spacer, ί i comprising a thin head and a wide body, and in that the wide body of the spacer is intended to be introduced between the corner jaws by centrifugal force or by another force. 6. rotary cutting head according to claim 5, in which the wide body of the retractor can be introduced by the centrifugal force between the jaws of the corner, characterized in that it carries a tilted bent lever, in that one of the j bearings of the cutting head carries a plate, perpendicular t to the axis of rotation and sliding parallel to this axis,; as well as single acting cylinders acting in the direction of i. i I 9; sliding, these jacks pushing the plate against one of the arms of the bent lever by tilting the latter, the other] arm then extracts the wide body of the retractor from the corner jaws " 7. rotary cutting head according to claim 5 "characterized in that it carries a tilting bent lever, in that one of the bearings of the cutting head carries a plate, perpendicular to the axis of rotation, sliding parallel to this axis, and having a rim one face of which is substantially parallel to the plate, the bearing also carrying double-acting cylinders which act in the direction of sliding, in a first direction, - and via the face of the rim substantially parallel to the plate - to lower one arm of the cranked lever and thus raise the other arm of this lever which introduces the wide body of the spacer between the jaws of the corner, in a second direction, opposite to the first, - and by l 'middle of the plate - to reverse the position of the bent lever which then extracts the wide body of the spacer from the jaws of the corner. 8. Cutting head according to any one of claims 5 to 7characterized in that each corner jaw rotates around a pivot different from that of the other jaw. | r • 3