EP4288744A1

EP4288744A1 - Target launching machine

Info

Publication number: EP4288744A1
Application number: EP22701645.8A
Authority: EP
Inventors: Jean-Michel Laporte; Jean-Marc Fouques
Original assignee: Laporte Holding SAS
Current assignee: Laporte Holding SAS
Priority date: 2021-02-02
Filing date: 2022-01-26
Publication date: 2023-12-13
Also published as: FR3119450A1; US20240077289A1; WO2022167278A1

Abstract

The invention relates to a target launching machine, comprising a base (200) and a turret (300) on which a launching unit is mounted, the turret (300) being rotatably movable relative to the base (200) along a main axis (700), the base (200) comprising an upper surface and the turret (300) comprising a lower surface facing the upper surface, which target launching machine comprises an intermediate system (100) positioned between the upper surface and the lower surface, the intermediate system being in contact with the upper surface and the lower surface, and forming a sliding interface between the intermediate system and the upper surface and/or the lower surface.

Description

“TARGET THROWING MACHINE”

TECHNICAL FIELD OF THE INVENTION

The present invention relates to the field of target launching machines. It finds for particularly advantageous applications certain shooting disciplines such as "DTL", English acronym for "Down The Line" (which can be translated as "in line" or the "American Trap". It can also be apply more generally to disciplines similar to clay pigeon shooting and offering events with varied target trajectories, these targets generally being clay pigeons.

STATE OF THE ART

Many mechanisms give launch machines adjustable orientations. We know in particular the patent application FR2709543A1 in which we find a target launching machine, represented in FIG. 1 and equipped with a base 14 and a turret 6. The turret 6 being surmounted by a launching unit 5 and coming to be fitted on a vertical and rigid shaft 7, integral with the base 14. A motor 10 ensures, by means of a cam 11 and an articulation rod 12, the rotation of the turret with respect to the base along an axis of rotation 8 in order to modify the firing angle.

This device also makes it possible to modify the angular opening according to which the machine is oriented, thanks in particular to the rotation of the turret relative to the base 14. To do this, the shaft 7 which supports the turret 6 must be sufficiently robust. in order to be able to transmit a torque allowing a controlled rotation. The rotational movement must be as regular as possible and this necessarily requires good stability of the machine. In a device like the one proposed in application FR2709543A1, the shaft must provide a torque high in order to allow the rotation of the turret 6 while at least partially supporting the axial loads, essentially due to the weight of the rotary assembly.

With a view to offering ever more efficient target launching machines, there is a need to optimize the stability of the machine. Indeed, during the launch phase, the distribution of the masses tends to unbalance the machine which can then wobble slightly.

It is known from the state of the art, the document CH508193A5 in which is disclosed a technical solution comprising a ball bearing system allowing the stabilized rotation of a turret. Nevertheless, beyond the fact that this solution is likely to prove to be expensive, it would not allow sufficient recovery of the axial loads and moreover, an overly optimized rotation would undoubtedly cause the device to wobble at the end of the throw.

It is also known from the state of the art, the document US20060065258A1 describing a device in which a spacer allows rotation by sliding of a turret. However, this solution is insufficient because it does not allow good cooperation by sliding.

An object of the present invention is therefore to propose a system making it possible to improve a machine having a mobile turret in rotation relative to a base.

The other objects, features and advantages of the present invention will become apparent from a review of the following description and the accompanying drawings. It is understood that other benefits may be incorporated.

SUMMARY OF THE INVENTION

To achieve this objective, according to one embodiment, a target launching machine is provided, comprising a base and a turret surmounted by a launching unit, the turret being rotatable relative to the base along a main axis, the base comprising an upper surface and the turret comprising a lower surface facing the upper surface, machine in which an intermediate system interposed between the upper surface and the lower surface, the intermediate system being in contact with the upper surface and the lower surface and forming a sliding interface between the intermediate system and the upper surface and/or the lower surface.

Without this machine, the turret would be unstable unless it used an oversized linkage mechanism consisting of a pivot pin inserted into a hub fitted with two bearings. This solution requires a robust support shaft capable of transmitting the powerful torque necessary for stable and precise rotation of the turret. However, the use of this type of device reduces the precision of the machine and increases its energy consumption as well as its manufacturing cost. This type of solution reduces the stability of the machine due to the fact that the machine is raised by 60 to 200 mm.

Thus, it is possible here to reduce the size of the device by dispensing with a robust shaft and allows stabilized rotation with optimized inertia. The height of the launcher is thus reduced. The pivot axis is replaced by a formally simplified and inexpensive part, compatible with heavy loads and requiring very low energy consumption.

Simplified and improved rotation of a turret relative to a base in a target launching machine is therefore preferably allowed. In a preferred embodiment, the coefficient of friction induced by the intermediate system is not chosen very low, which may seem counter-intuitive, but which gives an effect of adhesion of the turret relative to the base when it is motionless ; it is then necessary to overcome a certain inertia to set it in motion, which is favorable to the suppression of parasitic movements of the turret when it is stationary, for example when a barrel for loading targets is set in motion or when the arm launch is actuated.

BRIEF DESCRIPTION OF FIGURES

The aims, objects, as well as the characteristics and advantages of the invention will emerge better from the detailed description of an embodiment of the latter which is illustrated by the following accompanying drawings in which:

FIG. 1 represents an example of a target launching machine known from the state of the art.

FIG. 2 represents an example of a target launching machine capable of comprising an intermediate system according to the present invention.

Figure 3 shows an example of a pivot connection between the turret and the base of a machine according to the present invention.

Figure 4 shows a partially sectioned view of the example pivot connection between the turret and the base shown in Figure 3.

Figure 5 shows a zoomed and cross-sectional view of the example pivot link between the turret and the base shown in Figure 3.

Figure 6 is an exploded view of the example turret-to-base pivot connection shown in Figure 3.

The drawings are given by way of examples and do not limit the invention. They constitute schematic representations of principle intended to facilitate understanding of the invention and are not necessarily scaled to practical applications.

DETAILED DESCRIPTION

Before starting a detailed review of embodiments of the invention, optional characteristics are set out below which may possibly be used in combination or alternatively:

According to one example, the intermediate system 100 comprises an upper contact face 101 configured to form a sliding interface with the lower surface 302, and in which the upper contact face 101 is made of a first material, the upper surface 201 is made of a second material and the lower surface 302 is made of a third material such that the dynamic coefficient of friction p1/3 between the first material and the third material is greater than or equal to 0.04 and/or is less than or equal to 0.3, preferably greater than or equal to 0.15 and/or less than or equal to 0.3, preferably greater than or equal to 0.18 and less than or equal to 0.22 and preferably is equal to 0.2.

This allows measured sliding of the turret 300 with the intermediate system 100.

Indeed, in the context of a target throw from a fixed machine, the 300 turret must be as stable as possible in order to be able to perform a throw with the greatest precision. Therefore, sliding with the intermediate system must be possible but with a certain limit to avoid forced braking by the actuator.

According to one example, the intermediate system 100 comprises a lower contact face 102 configured to form a sliding interface with the upper face 201, and in which the lower contact face 102 is made of a fourth material, the upper surface 201 is made of a second material and the lower surface 302 is made of a third material such that the dynamic coefficient of friction p4/2 between the fourth material and the second material is greater than or equal to 0.04 and/or less than or equal to 0.3, preferably is greater than or equal to 0.15 and/or less than or equal to 0.3, preferably greater than or equal to 0.18 and less than or equal to 0.22 and preferably is equal to 0.2.

This allows measured sliding of the intermediate system 100 with the base 200.

According to one example, the intermediate system 100 comprises at least one self-lubricating sliding part.

According to one example, the intermediate system 100 comprises at least one sliding part made of a material comprising brass and graphite. More generally, all or part of the sliding parts may be based on a metal or an alloy of metals (in particular steel, copper, brass, bronze), preferably to represent at least least 70% by mass of the overall material of the part. Preferably, this material also incorporates graphite, in a lower proportion by weight than the metal or the metal alloy; these may be graphite inserts within the metal matrix. For example, self-lubricating Misumi® brand pads can be used.

According to one example, the intermediate system 100 comprises several sliding parts.

Preferably, a plurality of sliding parts makes it possible to have a sufficient sliding surface while limiting the production cost of the parts and with a view to improving the stability of the device by distributing the loads. Faced with the problem of increasing the stability of a device while limiting the production costs of the parts, nothing would allow from the document US20060065258A1 to achieve a technical solution in which the intermediate system 100 comprises a plurality of parts of slippage.

According to one example, the intermediate system 100 comprises at least one sliding piece made of a polymer material, preferably polytetrafluoroethylene.

According to one example, the intermediate system 100 comprises, at least one set of sliding parts being such that its parts are distributed radially and uniformly around the main axis.

According to an example, in section, along a plane perpendicular to the main axis 700, the intermediate system 100 admits a section S so that the area of the section S is between 15% and 30% and preferably between 20% and 25% of a contact area corresponding to the projected surface which corresponds to the contact surface of the turret 300 attached to the base 200 in the absence of an intermediate system 100.

According to one example, the base 200 comprises a central element 210, centered with the main axis 700 and configured to position the turret 300 with respect to the base 200.

According to one example, the central element 210 projects from the intermediate system 100, the intermediate system 100 comprising a central sliding piece 110, preferably fixed relative to the base 200 and having a support surface 111 configured to take up the axial loads of the turret 300.

According to one example, the distance between the upper surface 201 and the lower surface 302 is greater than or equal to 4 mm and is less than 10 mm.

According to one example, a motorized actuator 600 is configured to rotate the turret 300 relative to the base 200.

According to one example, the actuator 600 is an electric actuator associated with a transmission system such as for example a connecting rod/crank system.

It is specified that in the context of the present invention, the term "launcher" is sometimes used instead of "machine" as claimed object, these terms should be considered as equivalent.

In the context of the invention, the term “radial orientation” or “radially” will be understood to refer to the positioning of a mobile element in rotation with respect to an axis.

In the context of the present invention, the term dynamic friction coefficient denoted p (or slip coefficient) will be understood to mean the constant of proportionality between the friction force T (or the slip resistance force) and the normal reaction N of Coulomb's law.

T = (J. - N

The terms "substantially", "approximately", "of the order of" mean "within 10%, preferably within 5%" or, in the case of an angular orientation, "within 10° ". Thus, a direction substantially normal to a plane means a direction having an angle of 90±10° relative to the plane.

In the remainder of the description, the term “on” does not necessarily mean “directly on”. Thus, when it is indicated that a part or a component A is resting "on" a part or a component B, this does not mean that the parts or components A and B are necessarily in direct contact with the other. These parts or components A and B can either be in direct contact or be supported on one another by the intermediary of one or more other parts. The same is true for other expressions such as for example the expression "A acts on B" which can mean "A acts directly on B" or "A acts on B via one or more other parts ".

In the present, the term mobile corresponds to a rotational movement or to a translational movement or else to a combination of movements, for example the combination of a rotation and a translation. In the present, when it is indicated that two parts are distinct, it means that these parts are separate. They are: positioned at a distance from each other, and/or mobile relative to each other and/or fixed to each other by being fixed by inserts, this fixing being removable or not.

A unitary one-piece part cannot therefore be made up of two separate parts.

In the present patent application, the term "united" used to qualify the connection between two parts means that the two parts are linked/fixed with respect to each other, according to all the degrees of freedom, except if is explicitly specified differently. For example, if it is indicated that two parts are integral in translation along an X direction, this means that the parts can be movable relative to each other except along the X direction. In other words, if one moves a part along the X direction, the other part performs the same movement.

GENERAL STRUCTURE

As illustrated in FIG. 2, and according to one example, the launching machine comprises a base 200, this base 200 is preferably fixed relative to the ground. On this base 200 is arranged a turret 300 surmounted by a launch unit 400. The launch unit 400 preferably comprises a barrel 410 configured so as to be able to store the targets of the machine. The launch unit 400 can also include a plate 420 on which the targets will be deposited during a launch phase. The machine may also include an actuator 600, configured to allow motorized rotation of the turret relative to the base 200.

As illustrated in Figure 3, the turret 300 is configured so as to be rotatable relative to the base 200 along the main axis 700.

According to one embodiment, the turret 300 is in pivot connection with the base 200. The axial stop along the main axis 700 is preferably carried out with a fixing element 500 is configured to allow tightening of the turret 300 with the base 200. Preferably the base 200 is a plate or a cut sheet, advantageously metallic, and configured so as to be able to be positioned and then maintained in position in contact with the ground. Preferably, the base 200 is thus immobile with respect to the ground. This connection can be made using bolts, preferably anchor bolts.

PREFERRED EMBODIMENT - KINEMATIC APPROACH

As illustrated in FIG. 4 and in FIG. 5, and according to a preferred embodiment of the invention, the launching machine comprises an intermediate system 100 comprising an upper contact face 101 and a lower contact face 102 whose at least one is a sliding surface. The intermediate system 100 is interposed between the base 200 and the turret 300 so as to allow the sliding of at least one element among the base 200 and the turret 300 with the intermediate system 100. The base 200 for its part comprises a surface upper 201 and the turret 300 comprises a lower surface 302. These two surfaces are opposite each other.

The intermediate system 100 is in contact simultaneously with the upper surface 201 of the base 200 and the lower surface 302 of the turret 300, respectively at the level of its lower contact face 102 and of its upper contact face 101. Advantageously, the system intermediate 100 is also fixed on one of the upper surface 201 and the lower surface 302.

In addition, the turret 300 is advantageously rotatable relative to the base 200 along a main axis 700. The intermediate system 100 is interposed between the upper surface 201 and the lower surface 302 and is in direct and simultaneous contact with the upper surface 201 and the lower surface 302 and thus forms a sliding interface between the intermediate system 100 and the upper surface 201 or between the intermediate system 100 and the lower surface 302.

PREFERRED EMBODIMENT

According to a preferred embodiment, the turret 300 and the intermediate system 100 are in plane contact. The intermediate system 100 is preferably fixed to the base 200 and the turret 300 slides freely on the intermediate system 100. Thus according to this example, the machine is configured so that the lower surface 301 of the turret 300 is free to slide on the upper contact face 101 of the intermediate system 100.

According to an illustrated embodiment, the intermediate system 100 is integral with the base 200, this attachment can be carried out using fastening elements such as, for example, screwing elements.

As illustrated in FIG. 4 and according to an example, the device comprises a base 200 on which is positioned the intermediate system 100 which comprises sliding parts and a central sliding part 110. The turret 300 being positioned on and in contact with the parts sliding part and the central sliding part 110. Preferably, the turret 300 comprises a hub in which are mounted a bearing and a locking system so as to allow a pivot connection between the base 200 and the turret 300 by rotation of the turret 300 around the central element 210.

As illustrated in Figure 5, and according to this same example, the central sliding piece 110 is configured to cooperate by fitting with a central element 210 secured to the base 200. This ensures the positioning of the intermediate system 100 with respect to the base 200. The central sliding part 110 advantageously comprises a bearing surface 111 configured to allow contact and at least partial absorption of the axial loads along the main axis 700.

The central element 210 is configured to at least partially allow the radial loads of the turret 300 to be taken up with respect to the base 200.

According to one example, the intermediate system 100 is mounted integrally on at least one of the two elements among the base 200 and the turret 300. As illustrated in FIG. 6 and according to this example, the device is configured to be able to be mounted according to a series of successive steps: fixing of the base 200 comprising a central element 210 relative to the ground by at least one fixing device which can be bolting elements, possibly countersunk screws. fixing of the intermediate system 100 integrally with the base 200, the intermediate system 100 comprising six sliding parts and a central sliding part 110, comprising a support surface 111, the fixing possibly being effected by means of fixing, optionally, it may be bolting elements and preferably threaded elements. positioning of the turret 300 on the intermediate system 100 by plane contact on plane of the upper contact face 101 with the lower surface 302, the positioning of the turret 300 is carried out using the central element 210 and by cooperation of the lower surface 302 with the support surface 111, locking in the direction taken by the main axis 700, of the pivot connection between the turret 300 and the base 200 using fixing elements 500, attachment of an actuator 600, to the base 200 and to an anchor point of the turret 300.

DYNAMIC COEFFICIENT OF FRICTION

According to one example, the upper contact face 101 is made of a first material, the lower contact face 102 of the intermediate system 100 is made of a fourth material, while the upper surface 201 of the base 200 is made of a second material and finally the lower surface 302 of the turret 300 is made of a third material.

According to a preferred embodiment, the materials are preferably chosen so that the dynamic coefficient of friction (p _1/3 ) between the first material and the third material is greater than or equal to 0.04 and/or is less or equal to 0.3, preferably greater than or equal to 0.15 and/or less than or equal to 0.3, preferably greater than or equal to 0.18 and less than or equal to 0.22 and preferably is equal to 0.2.

According to another embodiment, the materials are preferably chosen so that the dynamic coefficient of friction (p4/2) between the fourth material and the second material is greater than or equal to 0.04 and/or is less than or equal to 0.3, preferably greater than or equal to 0.15 and/or less than or equal to 0.3, preferably greater than or equal to 0.18 and less than or equal to 0.22 and preferably is equal to 0 ,2.

The first and third materials may be identical in particular; these may be steel surfaces.

INTERMEDIATE SYSTEM CONFIGURATION

According to one example, the intermediate system 100 comprises at least one sliding piece configured so as to be positioned between the base 200 and the turret 300.

Preferably, the sliding part can be a self-lubricating or oil-free pad, preferably made of brass and preferably comprising particles of graphite. The wafer is for example of rectangular shape which can have a thickness of 4 mm. Preferably, the thickness of the intermediate system is greater than or equal to 4 mm and less than 10 mm.

According to one embodiment, the intermediate system 100 comprises several sliding parts distributed radially and uniformly around the main axis 700.

According to a particular embodiment in which the intermediate system 100 is integral with the base 200, in section along a plane perpendicular to the main axis 700, the intermediate system 100 advantageously admits a section S, so that the area of the section S is between 15% and 30% and preferably between 20% and 25% of a contact area corresponding to the projected surface which corresponds to the contact surface of the turret 300 attached to the base 200 in the absence intermediate system 100.

MECHANICAL APPROACH

According to one example, the load take-up along the main axis 700, generated by the weight of the launch unit 400 is carried out at least partially and successively by the turret 300 then by the intermediate system 100 and finally by the base 200. In order to be able to optimize the launching machine, the present invention allows a wider seat of the turret 300 in order to allow better balance thanks to the largest possible contact surface in a plane perpendicular to the main direction 700.

Advantageously, the space between the turret 300 and the base 200 is less than 10 mm, preferably less than 8 mm, preferably less than 6 mm, preferably greater than or equal to 4 mm.

Advantageously, the base 200 is not in direct contact with the turret 300.

MOTORIZATION

According to one example, the rotation of the turret 300 relative to the base 200 can be motorized by means of an actuator 600. This actuator 600 advantageously comprises an electric cylinder connected to a transmission system, possibly being a connecting rod/ eccentric or a crank rod system.

Advantageously, the actuator 600 comprises an electric cylinder, attached at its end to the turret 300 at an anchor point provided for this purpose. A 12 V electric jack can be used.

OTHER EMBODIMENTS

Preferably, the intermediate system 100 comprises at least one plane of symmetry comprising the main axis 700.

Preferably, the intermediate system 100 comprises intermediate parts whose projection in a plane perpendicular to the main axis 700 covers a larger surface, preferably at least twice as large, as the projection of the turret 300 in this plane. . Thus, this type of system makes it possible to adjust the distribution of the loads, along the main axis 700, linked to the weight of the turret 300 on the base 200.

According to a particular embodiment, there is non-zero friction of the turret support 300 against the intermediate parts. Advantageously, the friction takes place in the plane where the contact takes place between the turret 300 and the intermediate system 100. Alternatively, the friction takes place in the plane where the contact between the base 200 and the intermediate system 100 takes place.

Advantageously, some intermediate parts are plates, preferably rectangular, distributed, preferably star-shaped, around the main axis 700, preferably homogeneously. For example, at least three platelets are present. A long dimension of the inserts can be directed radially, i.e. perpendicular to the main axis 700.

The intermediate parts are advantageously distributed under the turret so as to increase the contact surface between the turret 300 and the intermediate system 100, or, in addition or alternatively so as to increase the contact surface between the base 200 and the intermediate system 100

Preferably, the turret 300 comprises an upright and at its lower end, a turret support 300. Advantageously, the turret support 300 is a plate, preferably with a circular outline, and able to extend according to a constant thickness in a plane perpendicular to the main axis 700. Preferably, the upright of the turret 300 extends from a first face and a second free face, parallel opposite the first face, forms a sliding surface.

Preferably, the sliding surface extends beyond the projection of the upright on the plate.

Thus, the intermediate system is configured so as to allow a compromise between the largest possible contact surface with the turret 300 to allow better dynamic stability of the device while guaranteeing optimized contact between the sliding surface and the intermediate system 100 .

According to a particular embodiment, the projection of the intermediate parts in a plane perpendicular to the main axis 700 is inscribed in a disc with a diameter greater than 30cm.

According to a particular embodiment, the surface which cooperates with the sliding face of the intermediate system 100 (that is to say at least one of the upper face 201 and the lower face 302) has in itself a low friction; it may be an improved surface condition of the base material respectively of the base and the turret, or of a surface layer, respectively of the base and the turret, in a material reducing friction; for example, it may be a non-stick coating whose exposed face forms the sliding face on that among the base and the turret relative to which the intermediate system 100 slides.

According to one example, the target launching machine comprises an angular adjustment device. Advantageously, the adjustment device comprises a marker with graduations making it possible to orient the machine according to a predefined angular sector.

According to a particular embodiment, the machine comprises at least one sensor, preferably for delimiting the angular range and reversing the direction of rotation of the motor. The sensors are advantageously dedicated to the positioning of the cylinders and can be of the type potentiometer, optical or Hall effect. It may be a sensor whose number of pulses per mm of stroke is 12,599 and/or the permitted load is 6,000 Newton.

According to a particular embodiment, the intermediate system 100 is made of a single one-piece piece. This allows better flatness and simplified assembly of the device.

According to a particular embodiment, the intermediate system 100 and the base 200 form a single assembly, these two parts being fixed to each other.

According to a particular embodiment, the intermediate system 100 is a sliding film. It may be a polymer material, and in particular polytetrafluoroethylene; it can be a solid film, but also possibly fluid.

According to a particular embodiment, the actuator 600 allows the rotational drive of the turret 300 by combining a motor or an electric or hydraulic jack with a pinion/chain system or with a gear train system or even with a pulley/belt system. According to a particular embodiment, the machine comprises a system for locking an angular position in order to avoid any unwanted angular displacement of the machine during a firing phase.

According to a particular embodiment, the dynamic friction coefficient between the lower face 302 on the upper surface 101 is greater than or equal to 0.04 and/or is less than or equal to 0.3, preferably greater than or equal to 0, 15 and/or is less than or equal to 0.3, preferably greater than or equal to 0.18 and less than or equal to 0.22 and preferably is equal to 0.2. The coefficient must be between an upper limit and an upper limit in order to allow, on the one hand, sufficient sliding for the rotation of the turret 300 with respect to the intermediate system 100 and, on the other hand, a lower limit to allow minimum friction and necessary to brake the turret.

Indeed, according to this same embodiment, the turret 300 is preferably mounted freewheeling and consequently it is not only driven in rotation by the actuator 600 but also braked and then stopped by the latter. Thus, a coefficient of friction that is too low would force the actuator 600 to undesired mechanical forces, such as in particular during a deceleration phase of the turret 300. A coefficient of dynamic friction that is too low would require additional safety such as, for example, the use of an additional locking system.

According to one embodiment, the intermediate system 100 comprises a circular and/or annular sliding part centered radially around the main axis 700, as is the case with part 110; optionally it may comprise at least two concentric annular elements.

According to a particular embodiment, the intermediate system 100 comprises a Teflon® or plastic sliding part in order to reduce manufacturing costs.

According to a particular embodiment, the intermediate system 100 can preferably be a coating on the base 200.

According to a particular embodiment, the machine comprises a set of three superimposed layers, where the base 200, the intermediate system 100 and the turret 300. The machine thus has the advantage of uniformly distributing the load over a large surface and thus allows a simplification of the structures under stress.

According to a particular embodiment, the base 200 is fixed and is made of a steel plate, which can for example have a thickness of 4 mm and configured so as to be able to place on it a plurality of sliding pieces, preferably it These will be self-lubricating pads. All of the pads are configured so that they can be distributed in a circular configuration centered around the main axis 700.

According to a particular embodiment; the turret 300 has, for example, a circular-shaped base with a thickness that can be 4 mm. The base is preferably drilled in its center in order to generate an additional surface and is surmounted by a ring containing a bearing. Thus, this allows short centering associated with a surface contact generating friction optimizing the stability of the machine. Preferably, the upper 201 and lower 302 surfaces are circular and arranged along the same axis.

According to a particular embodiment, the machine can be adjusted according to a method comprising the following steps: varying the angle defining the scanning range, varying the angular positioning of the scanning range, freezing the machine in defined positions in an ordered or random order save in memory positions validated during the firing sequence, define your own firing sequence.

The invention is not limited to the embodiments described above and extends to all the embodiments covered by the claims.

DIGITAL REFERENCES

100. intermediate system

101 . upper contact face

102. bottom contact face

110. center slip piece

111. bearing surface

200. basis

201 . upper surface

210. central element

300. turret

302. lower surface

400. launch unit

500. fastener

600. actuator

700. main axis

Claims

1. Target launching machine, comprising a base (200) and a turret (300) surmounted by a launching unit (400), the turret (300) being rotatable relative to the base (200) according to a main axis (700), the base (200) comprising an upper surface (201) and the turret (300) comprising a lower surface (302) facing the upper surface (201),

• the machine being characterized in that it comprises an intermediate system (100) inserted between the upper surface (201) and the lower surface (302), the intermediate system (100) being in contact with the upper surface (201) and of the lower surface (302) and forming a sliding interface between the intermediate system (100) and the upper surface (201) and/or the lower surface (302), the intermediate system (100) comprising several sliding parts.

2. Machine according to the preceding claim, in which the intermediate system

(100) includes an upper contact face (101) configured to form a sliding interface with the lower surface (302), and wherein the upper contact face

(101) is made of a first material, the top surface (201) is made of a second material and the bottom surface (302) is made of a third material such that the dynamic coefficient of friction (p1/3) between the first material and the third material is greater than or equal to 0.04 and less than 0.3, preferably greater than or equal to 0.15 and is less than or equal to 0.3, preferably greater than or equal to 0.18 and less than or equal to 0.22 and preferably is equal to 0.2.

3. Machine according to any one of the preceding claims, in which the intermediate system (100) comprises a lower contact face (102) configured to form a sliding interface with the upper face (201), and in which the bottom contact (102) is made of a fourth material, the top surface (201) is made of a second material and the bottom surface (302) is made of a third material such that the dynamic coefficient of friction (p4/ 2) between the fourth material and the second material is greater than or equal to 0.04 and less than 0.3, preferably greater than or equal to 0.15 and less than or equal to 0.3, preferably greater than or equal to 0 .18 and less than or equal to 0.22 and preferably is equal to 0.2.

4. Machine according to any one of the preceding claims, in which the intermediate system (100) comprises at least one self-lubricating sliding part.

5. Machine according to any one of the preceding claims, in which the intermediate system (100) comprises at least one sliding part made of a material comprising brass and graphite.

6. Machine according to any one of the preceding claims, in which the intermediate system (100) comprises at least one set of sliding parts being such that its parts are distributed radially and uniformly around the main axis.

7. Machine according to any one of the preceding claims, in which in section along a plane perpendicular to the main axis (700), the intermediate system (100) admits a section S so that the area of the section S is between 15% and 30% and preferably between 20% and 25% of a contact area corresponding to the projected surface which corresponds to the contact surface of the turret (300) joined to the base (200) in the lack of intermediate system (100).

8. Machine according to any one of the preceding claims, in which the base (200) comprises a central element (210), centered on the main axis (700) and configured to position the turret (300) relative to the base ( 200).

9. Machine according to the preceding claim wherein the central element (210) projects from the intermediate system (100), the intermediate system (100) comprising a central sliding part (110) having a bearing surface (111 ) configured to at least partially take up the axial loads of the turret (300).

10. Machine according to any one of the preceding claims, in which the distance between the upper surface (201) and the lower surface (302) is greater than or equal to 4 mm and is less than 10 mm.

11. Machine according to any one of the preceding claims, comprising a motorized actuator (600) configured to rotate the turret (300) relative to the base (200).

12. Machine according to the preceding claim wherein the actuator (600) is an electric cylinder associated with a transmission system.