FR2791767A1 - Adjustable rifle butt has upper portion with fixing and height adjusting screws and lateral adjusting screws either side of these at level of head - Google Patents

Abstract

The rifle butt has an adjustable upper portion (10). Two screws (11, 12) fix it to the butt and regulate its height. They fit into tapped holes (13, 14) in the butt and their heads (11a, 12a) fit into oblong holes (15, 16) in the upper portion. Two lateral adjusting screws (21, 21', 22, 22') are fitted through bores in the upper portion at the level of the head of each fixing screw. All these screws are accessible through the bores.

Description

The invention relates to an adjustable rifle stock

  and a rifle fitted with such a stock.

  In the field of competitive shooting, it is known to equip the stock of a rifle with a height-adjustable cheekpiece in order to adapt the position of the bearing surface of the cheekbone of a shooter to its morphology. For example, EP-A-0 708 304 discloses a device for adjusting the position of a cheekpiece with respect to a stock in which braces are used for wedging the cheekpiece. It is necessary to disassemble the cheekpiece relative to the stock in order to adjust its height. US-A-5,235,764 teaches to mount a cheekpiece on a carriage adjustable in height by means of rods received in bores and immobilized in these by clamping screws, while a carriage is used for transverse adjustment of the cheekpiece. This

  complex system includes a large number of moving parts

  ment relative to each other, while the only transverse movement possible for the cheekpiece is a translation obtained by sliding the carriage controlled at a single point, which can lead to jamming of the device in certain

conditions.

  It is to these drawbacks that the invention more particularly intends to remedy by proposing an adjustable cheek piece, of simple and reliable design, the cheek of which can be adjusted without dismantling relative to the stick and whose position

  transverse is adjustable with great freedom.

  In this spirit, the invention relates to a rifle butt with adjustable bridle comprising means for immobilizing the rump on the butt in several positions, characterized in that these means comprise: - at least two anchoring and adjusting screws in height, each screwed into a thread in the upper part of the stick and the head of which is received in an oblong housing of the cheekpiece and - two transverse adjustment screws placed in the cheekpiece, at the level of the head of each anchoring screw and height adjustment, each transverse adjustment screw being received in a thread opening into this housing at the level of this head, - the anchoring and height adjustment screws and the

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  transverse adjustment being accessible from outside the

  nozzle, through the housing and / or through threads.

  Thanks to the invention, the height adjustment of the cheekpiece relative to the stock is made by screwing or unscrewing more or less the anchoring screws in the upper part of the stock and this, through the housing for receiving the head. these screws

  which is accessible from above the busc. The crossover setting

  sal can be carried out independently, at the level of each anchoring screw, which makes it possible to move the cheekpiece in translation or in pivoting relative to the stock, this adjustment being carried out by accessing the transverse adjustment screws through the ends of the through threads . The shooter can therefore easily adjust the position of the cheekpiece with respect to the stick as a function of its morphology, its clothing or the use of a scope, such manipulation being rapid and being able to be carried out during a competition or of a

  training, even in the great outdoors, thanks to an adapted key.

  According to the advantageous aspects of the invention, the stock incorporates one or more of the following characteristics: - The internal threads for receiving the anchoring screws and / or transverse adjustment screws are formed by inserts fixed in the stock or in the cheek piece . These inserts allow significant tightening torques, without danger of damaging the butt or the cheek piece. In this case, the receiving threads of the two transverse adjustment screws associated with an anchoring screw are advantageously formed in a single insert in which the housing for receiving the head of the anchoring screw is formed. - The housing for receiving the head of each screw

  anchor is elongated in a generally perpendicular direction

  cular to a longitudinal axis of the cheek piece. This aspect of the invention

  tion allows the transverse adjustment of the cheekpiece by moving the head of the anchor screw in the corresponding housing. Cross adjustment screws open

  advantageously in the housing in two diametrical directions

  trally opposite to the head of each anchor screw

  age and in the elongated direction of the housing. This makes it possible to exert efforts to immobilize the anchoring screws and to

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  adjustment distributed around the head of each anchor screw.

  - Each anchor and height adjustment screw is

  provided with a peripheral groove at the level of its head, the

  mite transverse adjustment screws opening into said housing being adapted to engage in this peripheral groove. This further improves the immobilization obtained

for the busc.

  - The cheekpiece includes at least one cheek extending towards the bottom of the stick in the firing position and capable of covering an intermediate space defined between the cheekpiece and the stick. This cheek removes the protruding edges of the

  cheekbones likely to come into contact with a shooter's face.

  According to an alternative embodiment of the invention, the cheekpiece comprises two cheeks adapted to be arranged on either side of the butt, overlapping the latter. This variant makes it possible to adapt a rifle for a left-handed or right-handed shooter. Advantageously, the stock is provided with at least one lateral depression for partial or total reception of the cheek, this depression being formed by machining on one side of the

  stock with a profile complementary to that of the cheek.

  The invention also relates to a rifle equipped with a stock as previously described. Such a rifle is easier to use than those known hitherto with

  optimization of the settings obtained.

  The invention will be better understood and other advantages thereof will appear more clearly in the light of the

  description which follows of two embodiments of a

  stock and a rifle in accordance with its principle, given only-

  ment by way of example and made with reference to the accompanying drawings in which: - Figure 1 is an exploded perspective view of a part of a rifle according to the invention; - Figure 2 is a perspective view of the butt of the rifle of Figure 1;

  - Figure 3 is a partial section along line III-

  III in Figure 2; - Figure 4 is a top view of the stick of Figure 2; - Figure 5 is a view similar to Figure 2 while the stock of the stick is in a second configuration; - Figure 6 is a partial section along the line VI-VI in Figure 2; - Figure 7 is a top view of the stock in the configuration of Figure 5; - Figure 8 is a top view of the stock of the previous figures in a third configuration and - Figure 9 is a view similar to Figure 3 for a

  stock according to a second embodiment of the invention.

  The rifle 1 shown in Figure 1 is equipped with a stock 2 intended to come into abutment, thanks to a heel 3, against the shoulder of a shooter. X-X 'denotes a longitudinal central axis

butt 2.

  A notch 4 is formed near the upper edge 2a of the butt 2 and is extended by a lateral depression 5 machined on the left side 2b of the butt 2 which is intended for use by a right-handed shooter. Of course, a similar depression can be provided on the right side 2c of the stick for a left-handed shooter. We note 4a the upper flat surface of the butt 2, defined at the bottom of the notch 4, and has a flat surface, perpendicular to the surface 4a and defined at the bottom of the depression 5, these surfaces being bordered

  by edge surfaces referenced respectively 4b and 5b.

  A cheekpiece 10 is provided to be mounted on the butt 2 and comprises a curved external surface 11a, a first planar surface 10b capable of coming to bear against the surface 4a and a second planar surface 10c able to come to bear against the surface 5a. We denote l0d the edge or profile of the surface 10oa, this profile having a geometry adapted to that of the edge surfaces

4b and 5b.

  Two screws 11 and 12 are provided to be anchored in the surface 4a by being screwed into two metal inserts 13 and 14, immobilized, for example glued, in the butt 2 and whose insert 14 appears more clearly in FIGS. 3 and 6. The inserts 13 and 14 can be made of materials other than metallic, in particular plastic. We denote Y1-Y ', the axis common to the insert 13 and to the screw 11 when the latter is screwed into this insert. We denote Y2-Y'2 the axis common to the insert

  14 and the screw 12 screwed into this insert.

  The screws 11 and 12 can be more or less screwed into the inserts 13 and 14, so that they protrude more or less outside the surface 4a, which allows the height of the cheekpiece 10 to be adjusted relative to the butt 2 like this

  appears from the explanations which follow.

  The lila head of the screw 11 is provided with a peripheral groove

  rique llb. Likewise, the head 12a of the screw 12 is provided with a peripheral groove 12b. The screw 11 is shorter than the screw 12 because the butt 2 is less high at the level of

  insert 13 only at insert 14.

  A first housing 15 is formed, in the front part, in the nozzle 10 between the surfaces 10a and 10b and makes it possible to receive the head 11a of the screw 11 screwed into the insert 13 when the

  busc is placed in the notch 4. This housing 15 is traversed

  health, in that it connects the internal surface 10b and the external surface 10a of the cheekpiece 10 at its upper curved part. A second housing 16, also through, is provided in the rear part of the cheekpiece 10 between the surfaces 10a and b and can receive the head 12a of the screw 12 in place in the insert 14. The housings 15 and 16 are oblong in directions Zl-Z'1 and Z2-Z'2 perpendicular to the respectively

  axes X-X 'and Y1-Y'i, on the one hand, and X-X' and Y2-Y'2, on the other hand.

  An insert 17 is provided in the nozzle 10 which it crosses right through in the direction Zl-Z ',. Similarly, a

  second insert 18 crosses the cheekpiece 10 in the direction Z2-Z'2.

  Each insert 17 or 18 forms two threads distributed on either side of the housing 15 or 16, that is to say of the head of the screw 11 or 12 in the position of FIGS. 2 to 4. Screws 21 and 21 'are intended to be screwed into the insert 17, on either side of the head 11a, the front ends 21a and 21'a of these screws having dimensions allowing them to engage in the groove llb. Similarly, screws 22 and 22 'are provided to be inserted into the insert 18, on either side of the head 12a of the screw 12 in place in the housing 16, while their respective front ends 22a and 22'a are

  shaped to be able to be engaged in the groove 12b.

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  The operation is as follows: The screws 11 and 12 are screwed into the inserts 13 and 14 until they protrude from the surface 4a by a predetermined height. The screws 11 and 12 are maneuvered using a male key or awl key not shown. The cheekpiece 10 is then placed on the butt 2, so that the heads 11a and 12a are respectively engaged in the housings 15 and 16. The screws 21 and 21 ', on the one hand, 22 and 22', on the other hand hand, are then tightened to immobilize the cheekpiece 10 relative to the heads 11a and 12a of the screws 11 and 12 by penetrating into the grooves 11b and 12b. We are then, for example, in the position of FIGS. 2 to 4. In this position, the screws 11 and 12 have been tightened as much as the screws 21 'and 22', while the screws 21 and 22 have been tightened against the heads lla and 12a after tightening the screws 21 'and 22'. Thanks to this tightening sequence, the surface 10b of the cheekpiece 10 bears against the surface 4a of the notch 4, while its surface 10c bears against the surface 5a. The cheekpiece is therefore in the low position and pushed as far as possible into the depression 5, so that it protrudes on the right side 2c of the stick 2 by a width !, more particularly visible on the

  figure 3. On the left side and on top, the outer surface

  upper 10a of the cheekpiece 10 is flush with the surface of the

butt 2.

  When it is necessary to change the position of the cheekpiece, for example to lift it, it is enough to loosen the screws 21, 21 ', 22 and 22' to be able to operate the screws 11 and 12 without releasing the cheekpiece 10 relative to the 'notch 4. Indeed, the head 11a and 12a of each screw 11 or 12 is accessible through the housing 15 or 16 which is through. It is then possible to loosen more or less each of the screws 11 and 12 to more or less lift the cheekpiece 10 relative to the butt 2, then to tighten the screws 21, 21 ', 22 and 22' by engaging their

  respective front ends in grooves 11b or 12b.

  It is possible to tighten the screws 21 and 21 ', on the one hand, and 22 and 22', on the other hand, so that the cheekpiece 10 is moved in the directions Z1-Z'1 or Z2-Z ' 2 along a range authorized by the longitudinal dimension of the housings 15 and

  16, on either side of the heads 11a and 12a of the screws 11 and 12.

  Indeed, the housings 15 and 16 are in the form of an elongated light in the direction Z1-Z'1, respectively Z2-Z'2, so that when the screws 21 and 22 are fully tightened before the screws 21 ' and 22 ', the straight sides of the housings 15 and 16 come into contact with the heads 11a and 12a, as shown in FIG. 6. It is then possible to tighten the screws 21' and 22 'to firmly immobilize the cheekpiece relative to the screws 11 and 12. In this position, which is that of FIGS. 5 to 7, the cheekpiece 10 has been moved to the left of FIGS. 3 and 6 by a distance d corresponding to the maximum stroke of the housings 15 and 16 around the heads lla and 12a which allows a shooter

  right-handed to have a support surface closer to his face.

  The cheek piece is then in its most distant position on the

left of the weapon.

  Of course, depending on the degree of tightening of the screws 21, 21 ', 22 and 22', different intermediate positions can

be obtained for the busc 10.

  In the position of FIG. 6, it is noted that the 10th side of the cheekpiece 10, which forms a cheek extending in the direction of the edge b of the depression 5, makes it possible to mask the space or interval E defined between the surfaces lob and 4a and the depression 5, so that the face of the user can be pressed against the outer surface 10a of the cheekpiece 10 which is continuous, independently of the relative position of the elements 10 and 2. In other words, the cheek 10th of the cheekpiece 10 prevents a user from risking hitting his cheekbone or cheek with an edge

long live from the busc 10.

  A chamfer 10f is provided at the junction of the surfaces o10b and lOc, so that the junction area of the cheek 10e and the central part of the cheekpiece 10 does not constitute an area of weakness of the cheekpiece. Stock 2 has a 2d chamfer

of additional strength.

  As shown in phantom in Figure 5, the cheekpiece can also pivot around an axis Y-Y 'overall

  perpendicular to the axis X-X 'and parallel to the axes Y1-Y'l and Y2-

  Y'2. Indeed, in the position of Figure 8, the screws 21 and 22 'are tightened fully while the screws 21' and 22 are tightened in a complementary manner. The heads 11a and 12a of the screws 11 and 12 are thus displaced respectively towards the bottom of the housing 15 on the right side of the cheek and towards the bottom of the housing 16 on the left side of the cheek, so that, in top view, the latter ci has rotated around the YY 'axis in a counterclockwise direction. It is also possible to rotate the cheekpiece counterclockwise, as shown by its dashed line in Figure 8, reversing the order

  tightening screws 21, 21 ', 22 and 22'.

  In view of the above, the invention allows both height adjustment, transverse adjustment, and pivoting adjustment around a transverse axis of the cheek piece 10

compared to the butt 2.

  The fact that the inserts 17 and 18 pass right through the cheekpiece makes it possible to precisely position the screws 10 relative to the housings 15 and 16, since these housings are respectively formed by oblong slots made in

these inserts.

  In the second embodiment of the invention represented

  felt in Figure 9, elements similar to those of the first

  embodiment bear identical references augmen-

  tees of 50. The cheekpiece 60 of this second embodiment is intended to be fixed to the stock 52 of a rifle by means of two

  anchor and height adjustment screw, one of which is shown

  tee with the reference 62, and transverse adjustment screws, two of which appear with the references 72 and 72 ', these screws each being provided with an end 72a or 72'a capable of engaging in a groove 62b of the head 62a . The screw 62 is received in an insert 64. The cheekpiece 70 differs from the previous one in that it comprises two cheeks 60e and 60f forming bearing surfaces for the shooter's face while the stock 52 is provided with two lateral depressions 55 and 55 ', so that a right-handed or left-handed shooter can use the rifle of this second embodiment by leaning on the continuous external surface 60a of the cheekpiece 60 from the left or from the right of the

lacrosse 52.

  The invention has been described with two anchoring screws and height adjustment of the cheekpiece in the butt; it is however applicable with more than two anchor screws, for example three

or four.

  Taking into account the independent nature of the height adjustments that can be obtained with the screws 11 and 12, one can also consider adjusting the inclination of the cheekpiece 10 by

compared to the butt 2.

  The depth of the lateral depressions 5, 55 and 55 'has been shown such that they can accommodate all of

  the thickness of the corresponding cheeks 10e, 60e ou 60f. However

  the cheek (s) of the cheekbone may be thicker than

the depth of these depressions.

  The cheek piece can be made of the same material as the butt, in particular of wood, but also of another material such as rubber, carboy, a plastic, possibly loaded with reinforcing fibers, or equivalent.

Claims (10)

  1. Rifle stock with adjustable cheekpiece comprising means for immobilizing said cheekpiece on said stock in several positions, characterized in that said means comprise: - at least two screws (11, 12) for anchoring and adjusting the height screwed each in a thread (13, 14) in the upper part (4) of said stock and whose head (lila, 12a) is received in an oblong housing (15, 16) of said cheekpiece (10) and - two screws (21, 21 ', 22, 22') of transverse adjustment disposed in said cheekpiece, at the level of the head of each anchoring screw and of height adjustment, each transverse adjustment screw being received in a thread (17, 18) opening into said housing (15, 16) at said head (11a, 12a) - said screws (11, 12) for anchoring and height adjustment and said screws (21, 21 ', 22, 22') for transverse adjustment being accessible from the outside of said cheekpiece (10), through said housing (15, 16) and / or said through threads (17, 18).   2. Stock according to claim 1, characterized in that said internal threads for receiving said anchoring screws and / or transverse adjustment screws are formed by inserts (13, 14, 17, 18) fixed in said stock (2) or in said busc (10).   3. Stock according to claim 2, characterized in that the internal threads of the two screws (21, 21 ', 22, 22') of transverse adjustment associated with an anchoring screw (11, 12) are formed in a single insert (17, 18) in which is housed the housing (15, 16) for receiving the head (11a, 12a) of the anchor screw.   4. Stock according to one of the preceding claims,   characterized in that said housing (15, 16) for receiving the head (11a, 12a) of each anchor screw is elongated in a direction (Zl-Z'I, Z2-Z'2) generally perpendicular to a longitudinal axis (X-X ') of said cheekpiece.   5. Stock according to claim 4, characterized in that   said transverse adjustment screws (21, 21 ', 22, 22')   chent in said housing (15, 16) in two directions diametrically opposite with respect to said head (11a, 12a) of each anchor screw (11, 12) and in the elongated direction (Z1-Z'1, Z2-Z '2) of said housing.   6. Stock according to one of the preceding claims,   characterized in that each anchoring and height adjustment screw (11, 12) is provided with a peripheral groove (11b, 12b) at its head (1a, 12a), the end (21a, 21 ' at,   22a, 22'a) of said screws (21, 21 ', 22, 22') of transverse adjustment   sal opening into said housing being adapted to engage in said peripheral groove.   7. Stock according to one of the preceding claims,   characterized in that said cheekpiece (10; 60) comprises at least one cheek (10e; 60e, 60f) extending towards the bottom (5b) of the stick in the firing position and capable of covering a defined intermediate space (E) between said cheekpiece and said stock (2; 52). 8. Stock according to claim 7, characterized in that said cheekpiece (60) comprises two cheeks (60e, 60f) able to be   arranged on either side of said stock (52), overlapping highly of it.   9. Stock according to one of claims 7 or 8, character-   risée in that it is provided with at least one lateral depression (5; 55, 55 ') of partial or total reception of said cheek (10th; 60e; 60f), said depression being formed by machining from one side ( 2b) of said stock (2; 52) with a   profile complementary to that of said cheek.   10. Rifle (1), characterized in that it is equipped with a   stick (2; 52) according to one of the preceding claims.