Opening mechanism for a weaving machine and method for adjusting the same

Abstract

An opening machine for a weaving machine and a method for adjusting the same are disclosed. The opening machine (2) comprises an eccentric system (30) rotatable about a main axis (X20), a lever (50), and a transmission bar (40) coupled to the eccentric system and pivotally coupled to the lever about an eccentric axis (X41) and a connecting bar axis (X42), the eccentric axis and the connecting bar axis being spaced apart by a connecting bar center distance (R2), the main axis (X20) and the eccentric axis (X41) being spaced apart by an eccentric distance (R1). To facilitate adjustment of the stroke of a heald frame operated by the opening machine, the opening machine comprises an adjustment system allowing: an adjustment configuration in which the eccentric distance (R1) or the connecting bar distance (R2) is adjustable; and a locking configuration in which these distances are fixed. The opening machine (2) comprises a locking system (80) allowing a lever locking configuration and a lever release configuration.

Description

Technical Field

[0001] The present invention relates to a shedding machine for a loom, a loom including such a shedding machine, and a method for adjusting the shedding machine.

[0002] This invention relates to the technical field of shedding machines of the bar-heal frame actuator type for heald frame looms. Background Technology

[0003] As is well known, multiple electric heald frame actuators are used to drive the heald frame to oscillate vertically. Depending on the technology employed, the electric actuators produce either oscillating rotation or continuous rotation. In both cases, each electric actuator drives the corresponding heald frame via a tension mechanism, which includes a crank pin, connecting rod, and lever, converting the rotation generated by the actuator into reciprocating translation of the heald frame. During loom operation, especially when changing warp pieces, it may be necessary to adjust the amplitude and height of the heald frame stroke. Changing the amplitude means changing the shed opening angle. Changing the height is equivalent to changing the height of the warp crossover.

[0004] EP14989208A1 describes an open device including an electrically oscillating rotary actuator. In this case, the amplitude and height of the heald frame stroke depend on the oscillating stroke of the actuator. However, achieving an oscillating actuator instead of a continuously rotating actuator involves strict design constraints, making it difficult to achieve a wide range of adjustments or limiting the maximum load and speed that the actuator can provide.

[0005] FR2977592A1 and FR2734610A1 both describe an open-end device in which a heald frame actuating lever is connected to a crank-connecting rod system via an adapter or yoke. The position of the adapter or yoke can be manually adjusted along the arm belonging to the lever and can be secured using a clamping screw. However, manually adjusting this type of system can be cumbersome and difficult to achieve precision.

[0006] DE102008032718B3 describes an opening device in which the eccentricity of the eccentric device can be adjusted by moving an eccentric connecting rod relative to a connecting element that drives a disk, the connecting element itself being rotated by an actuator. Adjustment is made manually via an adjusting rod. One disadvantage of this type of adjustment is that the adjustable parts may be difficult to access, adjustment requires numerous tightening or loosening steps, and a high level of skill is required to perform the adjustment. Summary of the Invention

[0007] The present invention aims to overcome the shortcomings of the prior art by providing a new type of opening machine, in which the reciprocating stroke during the translation of the heald frame is easily adjusted.

[0008] The present invention relates to a shedding machine for operating a heald frame of a loom according to a reciprocating stroke translating along the heald frame axis. The shedding machine includes: a rotary electric actuator; a controller adapted to control the rotary electric actuator; an eccentric system including a base and a connector, the rotary electric actuator rotating the eccentric system about a main axis perpendicular to the heald frame axis via the base, and the connector defining an eccentric axis parallel to the main axis; a lever pivoting oscillatingly about a lever axis to operate the heald frame, the lever axis being parallel to the main axis; and a connecting rod including a first hinged end and a second hinged end, the connecting rod being connected to the connector via the first hinged end such that the eccentric system and the connecting rod can pivot relative to each other about an eccentric axis spaced apart from the main axis by an eccentric distance, and the connecting rod being connected to the lever via the second hinged end such that the lever and the connecting rod can pivot relative to each other about a connecting rod axis parallel to the main axis, the connecting rod axis being spaced apart from the eccentric axis by a connecting rod center distance.

[0009] According to the present invention, the opening machine includes an adjustment system and a locking system. The adjustment system includes a locking device and allows: at least one of an amplitude adjustment configuration and a height adjustment configuration, in which the locking device allows the connector to move relative to the base such that the eccentricity distance is adjustable, and in the height adjustment configuration, the locking device allows the second hinge end to move relative to the first hinge end such that the center distance of the connecting rod is adjustable; and a locking configuration in which the eccentricity distance and the center distance of the connecting rod are fixed because the locking device is configured to securely fix the connector to the base and securely fix the first hinge end to the second hinge end; and the locking system allows a locking configuration and a releasing configuration, in which the locking system locks the orientation of the lever when the lever is in a reference orientation, and in the releasing configuration, the locking system allows the lever to pivot.

[0010] One idea behind this invention is to specify that when the heddle frame is in the adjustment configuration and the locking system is in the locking configuration, the rotation of the eccentric system alters the reciprocating translational stroke adjustment of the heddle frame because the locking system locks the lever in a reference orientation. Specifically, in the amplitude adjustment configuration, the center distance of the connecting rod is fixed, such that when the lever is locked, a change in the orientation of the base of the eccentric system around the main axis corresponds to a change in the eccentric distance. In the height adjustment configuration, the eccentric distance is fixed, such that when the lever is locked, a change in the orientation of the eccentric system around the main axis corresponds to a change in the center distance value of the connecting rod. Advantageously, the rotation of the eccentric system can be performed by a rotary electric actuator, so that in the adjustment configuration, adjustment can be performed by issuing a command to rotate the eccentric system via the rotary electric actuator, whether the command is transmitted according to an operator's command or according to an automatic adjustment program. Once the lever is locked in the reference orientation and the adjustment system is in the adjustment configuration, it is advantageous that no manual movement of the heddle frame components is required to perform the adjustment, which reduces the risk of error, makes the adjustment less cumbersome, and allows for particularly precise adjustments. Alternatively, the eccentric system can be rotated manually to perform the adjustment.

[0011] This invention applies to machines with amplitude adjustment configurations, machines with height adjustment configurations, and machines with both amplitude and height adjustment configurations. This invention applies to shed opening machines that include a shed height adjustment system, or a shed amplitude adjustment system, or a shed height adjustment system and a shed amplitude adjustment system.

[0012] Preferably, the locking system includes a stop that mechanically engages with the lever to lock its pivoting, and that releases from the lever to allow its pivoting.

[0013] Preferably, in order to make the eccentricity adjustable when the adjustment system is in the amplitude adjustment configuration, the connector and the base are pivotable relative to each other about the crank axis, the crank axis being fixed relative to the base and relative to the connector, and parallel to the main axis.

[0014] Preferably, the connector includes a crank pin coaxial with the crank axis, and the base includes a retaining ring for receiving the crank pin, the base carrying the connector by means of the crank pin received in the retaining ring.

[0015] Preferably, the base includes a crank pin coaxial with the crankshaft, and the connector includes a retaining ring for receiving the crank pin, the base carrying the connector by means of the crank pin received in the retaining ring.

[0016] Preferably, the locking device includes a clamping screw, which, in the locking configuration of the adjustment system, is in a clamping position where the retaining ring is clamped around the crank pin to secure the connector to the base, and in the amplitude adjustment configuration of the adjustment system, the clamping screw is in a releasing position that releases the retaining ring around the crank pin to allow the connector to pivot relative to the base by pivoting the crank pin in the retaining ring.

[0017] Preferably, the base includes a cam groove defining a helix about a main axis, and the connector includes a finger follower that travels along the cam groove to guide the connector relative to the base when the adjustment system is in an amplitude adjustment configuration and thus changes the eccentricity distance.

[0018] Preferably, the eccentric system includes a flange and a rod, the flange extending perpendicular to the main axis and including: means for positioning a finger follower in a cam groove; and an elongated elliptical opening along the translation axis, and the rod being coaxial with the main axis and received in the elliptical opening to support the flange through the elongated opening.

[0019] Preferably, the locking device includes a clamping screw and a clamping nut forming the rod, the clamping screw and clamping nut being threaded together along the main axis. Preferably, in the locking configuration of the adjustment system, the flange is securely fixed to the base by screwing the clamping screw into the clamping nut, and the flange is axially clamped on the base to fix the connector relative to the base along a helical path, thereby fixing the eccentricity distance. Preferably, in the amplitude adjustment configuration, the connector is allowed to move relative to the base by loosening the clamping screw of the clamping nut.

[0020] Preferably, the connecting rod includes a first connecting rod end that carries a first hinge end and a second connecting rod end that carries a second hinge end. The first connecting rod end and the second connecting rod end can be slidably mounted together along the sliding axis, so that the center distance of the connecting rod is adjustable.

[0021] Preferably, the adjustment system includes an adjustment stop in the amplitude adjustment stop and the height adjustment stop. When the adjustment system can be configured for amplitude adjustment, the amplitude adjustment stop restricts the movement of the connecting member to limit the variation of the eccentric distance between a predetermined minimum eccentric distance value and a predetermined maximum eccentric distance value. And when the adjustment system can be configured for height adjustment, the height adjustment stop restricts the movement of the second hinge end to limit the variation of the center distance of the connecting rod between a predetermined minimum center distance value and a predetermined maximum center distance value of the connecting rod.

[0022] Preferably, the adjustment system includes at least one of an amplitude adjustment brake and a height adjustment brake, the amplitude adjustment brake being configured to maintain the position of the connector relative to the base when a specific relative displacement force is applied, and the height adjustment brake being configured to maintain the position of the second hinge end relative to the first hinge end when a specific relative displacement force is applied, when the adjustment system is in an amplitude adjustment configuration.

[0023] Preferably, the adjustment system includes at least one scale group of amplitude adjustment scale group and height adjustment scale group, wherein the amplitude adjustment scale group indicates the amplitude adjustment value according to the eccentric distance, and the height adjustment scale group indicates the amplitude adjustment value according to the center distance of the connecting rod.

[0024] Preferably, the controller can control the rotary electric actuator to change the eccentric distance in the amplitude adjustment configuration or the center distance of the connecting rod in the height adjustment configuration.

[0025] Another object of the present invention is a loom comprising a shedding machine as defined above and a heald frame operated by the shedding machine.

[0026] Another object of the present invention is an adjustment method for adjusting an opening machine, the opening machine being as defined above. The adjustment method sequentially includes: a step of pivoting a lever to a reference orientation by rotating an eccentric system when the adjustment system is in a locked configuration and the locking system is in an unlocked configuration; a step of placing the locking system in a locked configuration; a step of placing the adjustment system in an adjustment configuration; an adjustment step of adjusting the eccentric distance by rotating the eccentric system by a predetermined value when the adjustment system is in an amplitude adjustment configuration; and an adjustment step of adjusting the center distance of the connecting rod by rotating the eccentric system by a predetermined value when the adjustment system is in a height adjustment configuration.

[0027] Preferably, for the adjustment step, the rotation of the eccentric system is executed by a rotation command from a rotary electric actuator.

[0028] Preferably, the rotary electric actuator is rotatably controlled according to a target or incremental value setpoint related to the desired heald stroke or desired heald height.

[0029] Preferably, the adjustment method includes a pre-check step, which is performed after the step of placing the adjustment system in the adjustment configuration and before the adjustment step. The pre-check step includes: running a rotary electric actuator along a first rotation direction until reaching the adjustment stop; measuring a first rotation angle described by the eccentric system reaching the adjustment stop; comparing the measured first rotation angle with a predetermined first angle to determine whether the opening machine is in a nominal condition or a fault condition, the predetermined first angle corresponding to the rotation expected based on the position of the adjustment stop, a fault condition such as a loosening fault or an adjustment fault; and issuing an alarm if the opening machine is determined to be in a fault condition.

[0030] Preferably, prior to the step of transmitting the first set point, the pre-check control includes: controlling a rotary electric actuator rotatably in a direction opposite to the first rotation direction until reaching the adjusting stop; measuring a second rotation angle described by the eccentric system reaching the adjusting stop; and comparing the measured second rotation angle with a predetermined second angle to determine whether the opening machine is in a nominal condition or a fault condition, the predetermined second angle corresponding to the rotation expected based on the position of the stop, such as a loosening fault or an adjusting fault.

[0031] Preferably, after the adjustment step, the adjustment method sequentially includes: implementing the adjustment system in a locked configuration; and implementing the locked system in a released configuration.

[0032] Preferably, the adjustment method includes a lock check step between the step of implementing the lock system in the lock configuration and the step of implementing the adjustment system in the adjustment configuration. The lock check step includes: checking that the rotary actuator does not rotate when a predetermined torque value is applied; and issuing an alarm indicating a lock failure when rotational movement of the rotary electric actuator is detected.

[0033] Preferably, the adjustment method includes a lock check step between a lock configuration step and a release configuration step, the lock check step including: a step of checking that the rotary electric actuator does not rotate when a predetermined torque value is applied; and a step of issuing an alarm indicating a lock failure when rotational movement of the rotary electric actuator is detected.

[0034] Preferably, the adjustment method includes: cutting off the power supply to the rotary electric actuator during the step of implementing the adjustment configuration. Attached Figure Description

[0035] The invention and its other advantages will become more apparent from the following description of embodiments of the invention, given only by way of example and with reference to the accompanying drawings, in which:

[0036] Figure 1 This is a partial perspective view of a loom equipped with four sheathing machines according to a first embodiment of the present invention.

[0037] Figure 2 yes Figure 1 A perspective view of an open-face machine viewed from another angle.

[0038] Figure 3 It belongs to Figure 2 A partial longitudinal sectional view of the connecting rod of the machine.

[0039] Figure 4 It belongs to Figure 2 and Figure 3 A front view of the actuator and eccentric system of the opening machine, wherein the connector belonging to the eccentric system is shown as if cut in a vertical plane.

[0040] Figure 5 It shows Figures 2 to 4 Several side views of the opening machine illustrate the steps for implementing the locking configuration.

[0041] Figure 6 It shows Figures 2 to 5 Several side views of the opening machine, shown in the amplitude adjustment configuration.

[0042] Figure 7 It shows Figures 2 to 6 Several side views of the opening machine, shown in a height-adjustable configuration.

[0043] Figure 8 This is a partial perspective view of a loom equipped with four sheathing machines according to a second embodiment of the present invention.

[0044] Figure 9 This is a perspective view of an eccentric system belonging to an opening machine according to a third embodiment of the present invention.

[0045] Figure 10 yes Figure 9 A perspective view of an eccentric system viewed from another angle.

[0046] Figure 11 This is a partial front view of the opening machine according to the fourth embodiment, which in particular shows the eccentric system in the first configuration.

[0047] Figure 12 It is similar to Figure 11 The view shows the eccentric system in the second configuration.

[0048] Figure 13 yes Figure 11 and Figure 12 The cross-section of the opening machine.

[0049] Figure 14 yes Figures 11 to 13 A perspective view of a portion of the opening machine.

[0050] Figure 15 yes Figures 11 to 14 A perspective view of another part of the opening machine.

[0051] Figure 16 This is a cross-section of the opening machine according to the fifth embodiment of the present invention.

[0052] Figure 17 This is a block diagram of the adjustment method according to the present invention. Detailed Implementation

[0053] Figure 1 A first embodiment is shown, including a loom 1 having heald frames 11 and 12, and a sheathing machine 2 for operating the heald frames 11. Figure 1 In the image, the frame 11 is shown in scale relative to the machine 2.

[0054] Here, four helical frames 11 and four machines 2 are provided, with each machine 2 operating one helical frame 11.

[0055] As a variation, multiple assembly frames 11 are provided in addition to four. Alternatively, multiple machines 2 are provided in addition to four. Alternatively, a single machine 2 can be provided to operate multiple assembly frames 11.

[0056] Advantageously, each heald frame 11 includes an upper crossbeam 13, a lower crossbeam 14 parallel to the crossbeam 13, and two posts 15 and 16, which are parallel to each other and connect the crossbeams 13 and 14. Preferably, the crossbeams 13 and 14 are placed horizontally, while the posts 15 and 16 are placed vertically. Each heald frame 11 is equipped with a row of healds (not shown), each heald connecting the crossbeams 13 and 14 and arranged between the posts 15 and 16, distributed along the crossbeams 13 and 14. Each heald carries an eyelet through which the warp yarn passes, forming a warp sheet. Advantageously, the loom 1 includes other components (not shown), such as a reed holder and a weft insertion device.

[0057] For weaving purposes, each machine 2 is designed to actuate the corresponding heald frame 11 along the heald frame axis Z11 specific to that heald frame 11 according to a reciprocating translational stroke C11 relative to the heald frame 12. The term "stroke" refers to the distance traveled by the heald frame 11 during its movement. Figure 1 It shows the location Figure 1The stroke C11 of the heald frame 11 in the foreground. As the machine 2 moves the heald frame 11 along the stroke C11, the heald frame 11 moves parallel to the axis Z11 according to linear movement, moving back and forth between a high limit position H11 corresponding to the upper limit of the stroke C11 and a low limit position B11 corresponding to the lower limit of the stroke C11. The axis Z11, and therefore the movement of the heald frame 11, is preferably vertical, or at least parallel to the heald line of the heald frame 11 under consideration.

[0058] During weaving, in order to insert each weft yarn, the position of each heald frame 11 is determined independently along its corresponding stroke C11 by the machine 2, so as to define the loom shed that accommodates the inserted weft yarn. Then, the loom 1 produces a fabric composed of warp and weft yarns with the desired weave pattern.

[0059] Each shedding machine 2 includes a rotary electric actuator 20 and a pulling mechanism, which includes an eccentric system 30, a connecting rod 40 (so-called "drive rod"), a lever 50, and preferably includes a connecting rod 60, a lever 70, a connecting rod 17, and a connecting rod 18. The loom 1 includes a locking system 80 shared between the machines 2.

[0060] For each heald frame 2, an actuator 20 is connected to the heald frame 11 by means of the pulling mechanism of the heald frame 2, and the heald frame 2 is operated by the electric actuator 20 of the heald frame 2, thereby the heald frame 2 operates each heald frame 11.

[0061] Advantageously, the actuators 20 are identical and arranged side by side along the same orientation. Advantageously, on one side of the lever 50, the actuators 20 are arranged close to the heald frame 11. Each rotary electric actuator 20 is an electric motor, which includes a stator 26 fixed relative to the heald frame 12 and a rotor that drives the output shaft 28 of the actuator 20.

[0062] In this example, the stator 26 includes a housing comprising a cylindrical wall based on a circle and a mounting plate 73 centered on an axis X20 referred to as the "main axis". The mounting plate 73 is perpendicular to the axis X20, enclosing the front end of the cylindrical wall and serving to securely attach the stator 26 to the heald frame 12. The rotor, not visible in the figure, is supported by the stator 26 and thus pivots relative to the stator 26 about the axis X20. The rotor is coaxial with the axis X20 and contained within the stator 26. Here, the output shaft 28 is formed directly at the front end of the rotor and extends through the mounting plate to the outside. When the actuator 20 is properly powered by the power circuit 21 belonging to the loom 1, the output shaft 28 is driven by the rotor to rotate about the axis X20. In other words, the actuator 20 is electrically connected to the power circuit 21 to power the rotor and / or the stator 26 and control the actuator 20.

[0063] Alternatively, it can be expected that the rotor and output shaft are separate components and not coaxial with actuator 20, with the rotor driving the output shaft through a gearbox, and the main axis X20 around which the output shaft rotates being parallel to the rotor's axis of rotation.

[0064] For each actuator 20, axis X20 is perpendicular to axis Z11. Advantageously, for each actuator 20, the main axis X20 is perpendicular to the plane defined by the heald frame 11. The heald frame 11 is distributed parallel to the axis X20 of the actuator 20. Advantageously, each traction mechanism is coplanar with the heald frame 11 it actuates. The actuators 20 themselves are slightly offset relative to each other, parallel to axis X20, such that the output shaft 28 of the actuator 20 lies within the plane of the heald frame 11 and the traction mechanism actuated by the output shaft 28. Because the heald frame 11 and the traction mechanism are distributed along parallel planes, the heald frame and the traction mechanism do not obstruct each other during movement.

[0065] Regarding actuator 20, other configurations are possible. For example, for the accessibility of loom 1 or space requirements, actuator 20 may be distributed according to the vertical columns, distributed on both sides of heald frame 11, and / or installed head-to-tail.

[0066] Preferably, during weaving, the actuator 20 performs continuous rotation, in other words, rotation without changing direction, rather than performing oscillating movement.

[0067] like Figure 1 As shown, for each traction mechanism, lever 50 pivots oscillatingly relative to heald frame 12 about axis X50, the so-called "lever axis," which is parallel to the main axis X20. Advantageously, lever 50 is coplanar with heald frame 11 to be actuated. Lever 50 is connected to heald frame 11 to be actuated via connecting rod 17. For this purpose, connecting rod 17 is connected to radial arm 51 belonging to lever 50 via a hinged end that allows connecting rod 17 to pivot relative to lever 50 about an axis parallel to axis X50, and connecting rod 17 is connected to heald frame 11 via a hinged end that allows connecting rod 17 to pivot relative to heald frame 11 about an axis parallel to axis X50, where radial arm 51 is generally horizontal. The hinged end of connecting rod 17 to heald frame is arranged on one side of column 15, at the bottom of heald frame 11, at the intersection between column 15 and beam 14. The two hinges of connecting rod 17 are generally parallel to axis Z11. The pivotal rotation of lever 50 via connecting rod 17 actuates and determines the pivotal translation of heald frame 11 along stroke C11.

[0068] At any given time, the orientation of lever 50 relative to heald frame 12 corresponds to a single position of heald frame 11 along stroke C11. During the oscillating pivoting of lever 50, lever 50 pivots along a first direction to the maximum orientation, at which heald frame 11 is at its highest position H11, and then lever 50 pivots along the opposite second direction to the minimum orientation, at which heald frame 11 is at its lowest position B11. In moving from the maximum orientation to the minimum orientation and then back again, lever 50 moves heald frame 11 throughout the entire stroke C11.

[0069] Furthermore, if configured, lever 70 can pivot in a swing manner relative to heald frame 12 about axis X70, referred to as the "lever axis," which is parallel to the main axis X20. Advantageously, lever 70 is coplanar with heald frame 11 to be actuated. Lever 70 is connected to heald frame 11 to be actuated via connecting rod 18. For this purpose, connecting rod 18 is connected to radial arm 71 belonging to lever 70 via a hinged end that allows connecting rod 18 to pivot relative to lever 70 about an axis parallel to axis X70, and connecting rod 18 is connected to heald frame 11 via a hinged end that allows connecting rod 18 to pivot relative to heald frame 11 about an axis parallel to axis X70, where radial arm 71 is generally horizontal. The hinged end of connecting rod 17 to heald frame 11 is arranged on one side of post 16, at the bottom of heald frame 11, at the intersection between post 16 and beam 14. The two hinges of connecting rod 18 are generally parallel to axis Z11. Advantageously, connecting rods 17 and 18 are parallel. Through connecting rod 18, the pivoting oscillation of lever 70 is actuated and determines the reciprocating translation of heald frame 11 along stroke C11.

[0070] During the pivoting swing of levers 50 and 70, levers 50 and 70 are synchronized so that they are in the same orientation relative to the heald frame 12 about their respective axes X50 and X70. For this purpose, as... Figure 1 As shown, connecting rod 60 is connected to the radial arm 52 of lever 50 via a hinged end that allows connecting rod 60 to pivot relative to lever 70 about an axis parallel to axis X50, and connecting rod 60 is connected to the radial arm 72 of lever 70 via a hinged end that allows connecting rod 60 to pivot relative to lever 70 about an axis parallel to axis X70, where radial arm 52 is a vertical arm and radial arm 72 is a vertical arm. Connecting rod 60 is generally parallel to the crossbeams 13 and 14 of heald frame 11. Preferably, arms 51 and 52 are vertical, such that lever 50 is generally L-shaped. Preferably, arms 71 and 72 are vertical, such that lever 70 is generally L-shaped. Lever 50 is oscillating about axis X50, which causes lever 70 to be oscillating synchronously about axis X70 via connecting rod 60, thereby causing heald frame 11 to be actuated by reciprocating translation via connecting rods 17 and 18, and simultaneously via levers 50 and 70.

[0071] The eccentric system 30 includes a base 31 and a connector 32.

[0072] Preferably, along axis X20, base 31 is arranged between actuator 20 and connector 32. Base 31 is fixed to output shaft 28 of actuator 20 to be directly driven by actuator 20 to rotate about axis X20 relative to heald frame 12. Axis X20 is fixed relative to heald frame 12 and base 31. The orientation of output shaft 28 about axis X20 corresponds to the orientation of base 31. By means of base 31, the entire eccentric system 30 rotates about axis X20 via actuator 20. Conversely, the rotation of eccentric system 30 about axis X20 drives rotor to rotate about axis X20.

[0073] The lever 50 is driven by a pivotal oscillation (i.e., a change in direction) via a transmission rod 40 through continuous rotation of the eccentric system 30. The transmission rod 40 converts the continuous rotation of the eccentric system 30 into a pivotal oscillation of the lever 50. For this purpose, the transmission rod 40 includes a hinged end 41 at a first end and a hinged end 42 at a second end.

[0074] The drive rod 40 is connected to the connector 32 of the eccentric system 30 via a hinge end 41. Through this hinge end 41, the drive rod 40 and the connector 32 can pivot relative to each other about an axis X41 (the so-called "eccentric axis"). The axis X41 is fixed relative to the drive rod 40 and relative to the connector 32, and is parallel to the axis X20. The axes X41 and X20 are spaced apart by a distance R1, which is the distance between the centers of the axes X41 and X20. This distance R1 is called the "eccentric distance". When the eccentric system 30 rotates about the axis X20, the axis X41 rotates about the axis X20.

[0075] In this example, the hinge end 41 includes a circular flange centered on axis X41, within which a crank pin 35 belonging to the connector 32 is housed. The crank pin 35 is pivotally supported within the flange by a bearing 43 centered on axis X41, where the bearing 43 is a rolling element bearing.

[0076] The drive rod 40 is connected to arm 52 of lever 50 via hinge end 42. As a variation, the drive rod 40 is attached to another arm of lever 50, which is different from arms 51 and 52. In either case, the drive rod 40 and lever 50 can pivot relative to each other about an axis X42, referred to as the "connecting rod axis," via hinge end 41. Axis X42 is fixed relative to the drive rod 40 and relative to the lever 50. Axis axes X42 and X50 are parallel and separated from each other, such that arm 52 connected to hinge end 42 serves as a lever arm for actuating lever 50 via drive rod 40. When drive rod 40 is driven via eccentric system 30, axis X42 rotates about axis X50. Axis X42 is also parallel to and spaced apart from axis X20. Axis axes X41 and X42 are parallel and spaced apart from each other by a distance R2, which is a distance measuring the center-to-center distance between axes X41 and X42. This distance R2 is referred to as the "connecting rod center distance."

[0077] In this example, the hinge end 42 includes two parallel flanges arranged on both sides of the lever 50. These two flanges of the end 42 and the arm 52 of the lever 50 are passed through an opening coaxial with the axis X42, in which a rivet (not shown) is accommodated to connect the lever 50 and the drive rod 40, while allowing the lever 50 and the drive rod 40 to pivot relative to each other.

[0078] Each shedding machine 2 includes an adjustment system that allows for a locking configuration and one or more adjustment configurations. In the locking configuration, center-to-center distances R1 and R2 are fixed. To perform weaving operations, the adjustment system must be in the locking configuration. In the locking configuration of the adjustment system and during weaving operations on the loom, the center distances R1 and R2 cannot be changed. For each adjustment configuration, one of the center distances R1 and R2 is variable, making this center distance adjustable, while the other center distance R1 or R2 is fixed. Here, the adjustment system allows alternating movement between the locking configuration, the amplitude adjustment configuration, and the height adjustment configuration, where the eccentricity distance R1 is variable and the connecting rod center distance R2 is fixed, and in the height adjustment configuration, distance R2 is variable and distance R1 is fixed. Alternatively, it can be anticipated that the adjustment system only switches between the locking configuration and one adjustment configuration (e.g., the height adjustment configuration).

[0079] Due to the structure of the tensioning mechanism, changing the eccentric distance R1 correspondingly alters the stroke C11. In other words, when the heald frame 11 is driven by the actuator 20 while the system is in a locked configuration, the distance between the heald frame 11 at its highest position H11 and its lowest position B11 changes accordingly. In this example, the larger the distance R1, the larger the stroke C11, meaning the larger the distance between positions B11 and H11. Therefore, changing the eccentric distance R1 allows for a change in the width of the shed opening controlled by the heald frame 11. For example, when the height of the stroke C11 is centered on the reference position P11—in other words, when positions B11 and H11 are equidistant from position P11—the distance R1 can vary from a minimum of 20 mm to a maximum of 60 mm, thus the stroke C11 ranges from a minimum of 50 mm to a maximum of 160 mm. The reference position P11 is defined as the center position, which corresponds to the intersection position of all yarn pieces on the loom 1.

[0080] Due to the structure of the pulling mechanism, changing the center distance R2 of the connecting rods will correspondingly change the height of the stroke C11 relative to the heald frame 12. In other words, the height of the stroke C11 relative to the reference position P11 of the heald frame 11 changes accordingly along the axis Z11 relative to the heald frame 12. Figure 1 As shown. Specifically, increasing the center distance R2 of the connecting rods will cause the end positions H11 and B11 to move upward relative to position P11. Conversely, decreasing the center distance R2 of the connecting rods will cause the end positions H11 and B11 to move downward relative to position P11. Preferably, changing the distance R2 will not change the stroke C11 amplitude; in other words, it will not change the distance between positions B11 and H11. Therefore, changing the center distance R2 of the connecting rods allows the shed crossover to be changed by adjusting the shed opening height controlled by the heald frame 11. For example, it is expected that the distance R2 can vary from -6 mm to +6 mm relative to the center value, corresponding to the height of stroke C11 moving from -8 mm to +8 mm relative to the reference position P11.

[0081] like Figure 2 , Figure 4 and Figure 6 As shown, to make the eccentricity distance R1 variable, the geometry of the eccentric system 30 is adjustable; in particular, the connector 32 is movable relative to the base 31. The adjustment system includes a locking device for selectively allowing such movement to obtain an amplitude adjustment configuration, and for prohibiting such movement to obtain a locked configuration or a height adjustment configuration.

[0082] In this example, to make the eccentric distance R1 adjustable when the adjustment system is in amplitude adjustment configuration, the connector 32 and the base 31 are pivotable relative to each other about an axis X32, referred to as the "crank axis". Axis X32 is fixed relative to the base 31 and relative to the connector 32, and is parallel to axis X20. Axis axes X41 and X32 are not coaxial. When the connector 32 pivots about axis X32 relative to the base 31, axis X41 moves relative to axis X20 along a circular path centered on axis X32, thereby changing the distance R1, as... Figure 6 As shown. In this sense, connector 32 forms a crank relative to base 31.

[0083] In the example, as in Figure 4 As best seen in the image, the base 31 is formed by a segment that is generally flat in a plane perpendicular to the axis X20. The base 31 includes a main opening 33 that receives the output shaft 28 of the actuator 20, thereby securing the base 31 to the shaft. Several fasteners are also provided, in this example, four screws 34 distributed around the axis X20, to ensure that the base 31 is rotatably and securely fixed to the output shaft 28 and / or the rotor of the actuator 20.

[0084] The base 31 also includes a locking ring 94 with two claws radially surrounding the crank axis X32. The connector 32 forms a crank pin 95, as shown in... Figure 4 As seen in the image, the crank pin 95 is housed within the retaining ring 94. The crank pin 95 is presented as a cylindrical member based on a circle, centered on axis X32, and housed within the jaws of the retaining ring 94, which has a complementary shape. The crank pin 95 protrudes from the crank pin 35 housed in the hinge end 41 in the opposite direction to and offset relative to the crank pin 35. The retaining ring 94 is secured around the crank pin 95 by a clamping screw 93, the head of which presses against one jaw of the retaining ring 94, the body of which passes through this jaw and screws into the thread of the other jaw. Advantageously, the screw 93 points in an orthogonal direction relative to axis X32, in other words, perpendicular to the radius starting from axis X32, and the screw 93 lies in a plane orthogonal to axis X32. Tightening the screw 93 facilitates bringing the jaws closer together, which allows a centripetal clamping force to be applied to the retaining ring 94 on the crank pin 95, thereby generating a tightening torque. The base 31 carries the connector 32 via its crank pin 95, because the crank pin 95 is accommodated in the retaining ring 94.

[0085] The retaining ring 94, crank pin 95, and screw 93 constitute the locking device of the adjustment system. In effect, by placing the screw 93 in the position where the retaining ring 94 is tightened around the crank pin 95, the connector 32 and the base 31 can be securely fixed relative to each other. In the clamped position, the screw 93 clamps the retaining ring 94 around the crank pin 95 to apply a sufficiently high tightening torque, thereby keeping the connector 32 fixed relative to the base 31 during weaving. In the locking configuration, the screw 93 is thus placed in the clamped position. In the amplitude adjustment configuration, the screw 93 is placed in the position where the retaining ring 94 around the crank pin 95 is released, such that the retaining ring 94 and the crank pin 95 form a pivotal connection, thereby allowing and guiding the connector 32 to pivot about axis X32 relative to the base 31.

[0086] Preferably, the adjustment system includes a braking device, particularly an amplitude adjustment brake. This amplitude adjustment brake ensures that, in the loosened position of screw 93, the tightening torque applied to crank pin 95 by locking ring 94 is not zero, thus creating a braking torque that allows the connector 32 to pivot relative to base 31 while resisting that pivoting. More generally, when the adjustment system is in amplitude adjustment configuration, the amplitude adjustment brake allows the connector 32 to move relative to base 31, but still resists that movement by applying braking torque and / or force. This prevents the adjustment system from changing distance R1 from the outset under the weight of the machine components when in amplitude adjustment configuration. This reduces the need for a motor brake on actuator 20, which is economically advantageous. The braking torque provides a force less than the applied specific relative displacement force, such that the amplitude adjustment brake is configured to maintain the position of connector 32 relative to base 31 when the adjustment system is in amplitude adjustment configuration and a specific relative displacement force is applied. This specific relative displacement force can be calculated based on the weight of the components, the heald frame and traction mechanism, the lever arm, or the friction between the components. The actuator is capable of exceeding the relative displacement force to rotate the base 31 and perform adjustment.

[0087] In this case, only Figure 4 The amplitude-adjustable brake shown includes a brake screw 91. To achieve braking torque, tightening the screw 91 ensures that the retaining ring 94 is slightly tightened around the crank pin 95, with the head of the screw 91 pressing against one of the claws of the retaining ring 94. Optionally, this is achieved through a set of Bavarian spring washers. The body of the screw 91 passes through this claw and screws into the other claw. For example, the screw 91 extends parallel to the screw 93, with its head and tail facing each other. Thus, advantageously, the screw 91 points in a direction orthogonal to the axis X32. To adjust the intensity of the braking torque, the screw 91 is screwed in or out.

[0088] Figure 6The following configurations are shown: Case 6A, corresponding to the intermediate amplitude adjustment configuration, in which the connector 32 is oriented such that the distance R1 is a central offset distance; Case 6B, corresponding to the minimum amplitude adjustment configuration, in which the connector 32 is oriented such that the distance R1 is a minimum center distance; and Case 6C, corresponding to the maximum amplitude adjustment configuration, in which the connector 32 is oriented such that the distance R1 is a maximum center distance. Preferably, the adjustment system includes an amplitude adjustment stop to limit the movement of the connector 32 about the axis X32 relative to the base 31 between the position shown in Case 6B (where the distance R1 is a minimum offset distance) and the position shown in Case 6C (where the distance R1 is a maximum offset distance). In other words, in this example, such movement of the connector 32 is pivoting. Therefore, the movement of the connector 32 exists only between these two positions and does not exceed these two positions. For example, to form an amplitude adjustment stop, base 31 carries a stop screw 38, which is screwed into base 31 parallel to axis X20 such that the head of screw 38 protrudes from the surface of base 31 on the side of connector 32. Any protrusion suitable for use as a stop can be provided instead of screw 38. To form the amplitude adjustment stop, connector 32 includes two shoulders 39 that form a border around the stop screw 38. Figure 6 As shown, in cases 6B and 6C, screw 38 alternately abuts one shoulder 39 and another shoulder 39, thus limiting the pivoting stroke of connector 32. Figure 6 As shown, for case 6A, screw 38 moves freely between shoulders 39 to obtain the intermediate value of distance R1.

[0089] like Figure 3 and Figure 7 As shown, to allow the center distance R2 of the connecting rods to be variable, the hinged ends 41 and 42 of the transmission rods can move relative to each other. The adjustment system includes a locking device for selectively allowing such movement to achieve a height adjustment configuration, and prohibiting such movement to achieve a locked configuration or an amplitude adjustment configuration.

[0090] In this example, to make the center distance R2 of the connecting rods adjustable when the adjustment system is in the height adjustment configuration, the hinged ends 41 and 42 slide relative to each other along a sliding axis R40 that intersects with or is at least parallel to the axes X41 and X42 and is parallel to the drive rod 40. For example, the drive rod 40 includes a drive rod end 44 that carries the hinged end 41 and a drive rod end sleeve 45 that carries the end 42. The end 44 is slidably mounted in the drive rod end sleeve 45, which is in the form of a sleeve to receive the rod-shaped drive rod end 44 and guide the drive rod end 44 to slide along the axis R40.

[0091] To form a locking device for the adjustment system, for example, the following configuration is made: the transmission rod 40 includes a bracket 96, a slipper 97, and at least one clamping screw 98, here three clamping screws. The heads of the screws 98 can be accessed from the outside of the transmission rod 40. The bracket 96 and the slipper 97 are arranged within the transmission rod end sleeve 45 and together form a clamp for locking the transmission rod end 44. The bracket 96 and the slipper 97 are arranged on both sides of the transmission rod end 44 in a manner similar to pliers. The slipper 97 is fixed relative to the transmission rod end sleeve 45 and is located between one wall of the sleeve and the handle of the transmission rod end 44. The bracket 96 is positioned between the other wall of the sleeve and the handle of the drive rod end 44, and is movable between a clamped position and a released position along a direction perpendicular to the axis R40. In the clamped position, the handle of the drive rod end 44 is clamped between the bracket 96 and the slip shoe 97, fixing the drive rod end 44 relative to the drive rod end 45 along the axis R40. In the released position, the handle of the drive rod end 44 is fully released to allow sliding. Tightening the clamping screw 98 moves the bracket 96 to the clamped position. Loosening the clamping screw 98 allows the bracket to return to its released position.

[0092] Preferably, the braking device of the adjusting system includes a height-adjusting brake. This height-adjusting brake ensures that even in the released position of the locking device of the transmission rod 40, the clamping force applied by the bracket 96 to the rod end 44 of the transmission rod is not zero, thus constituting a braking force. This braking force resists sliding while allowing the ends 41 and 42 to slide relative to each other. More generally, when the adjusting system is in the height-adjusting configuration, the height-adjusting brake allows relative movement of the ends 41 and 42, but still impedes this movement by applying a braking force and / or torque. This prevents the distance setting R2 from changing from the outset under the weight of the machine components when the adjusting system is in the height-adjusting configuration. This reduces the need for equipping the actuator 20 with a motor brake, which is economically advantageous. The braking torque provides a force less than the applied specific relative displacement force, such that the height-adjusting brake is configured to maintain the position of the second hinge end 42 relative to the first hinge end 41 when the adjusting system is in the height-adjusting configuration and a specific relative displacement force is applied. This specific relative displacement force can be calculated based on the weight of the components, the heald frame and traction mechanism, the lever arm, or the friction between the components. The actuator can exceed this relative displacement force to cause relative displacement between ends 41 and 42 and achieve adjustment.

[0093] In this case, only Figure 3 The height-adjustable brake, visible in the diagram, includes at least one spring 92, and in this example, two springs. To achieve braking force, the elastic compression of the springs 92 provides a slight tightening of the bracket 96 on the drive rod end 44, even when the screw 98 is loosened.

[0094] Figure 7Case 7A, corresponding to a neutral height configuration, is shown. In case 7A, the ends 41 and 42 are arranged such that the distance R2 is the center value of the distance between the center of the connecting rod. In other words, it corresponds to the case where positions B11 and H11 are equidistant from the reference position P11. Figure 7 Case 7B, corresponding to the minimum height configuration, is shown. In case 7B, the ends 41 and 42 are arranged such that the distance R2 adopts the minimum value of the center distance of the connecting rod, in other words, corresponding to the case where the stroke C11 moves to its minimum height relative to the reference position P11. Figure 7 Case 7C, corresponding to the maximum height configuration, is shown. In case 7C, the ends 41 and 42 are arranged such that the distance R2 adopts the maximum value of the distance between the center of the connecting rod, in other words, the case where the stroke C11 moves to its maximum height relative to the reference position P11. Figure 7 Case 7D, corresponding to the intermediate height configuration, is shown. In case 7D, the ends 41 and 42 are arranged such that the distance R2 adopts the intermediate value of the center distance of the connecting rod. In other words, it corresponds to the case where the stroke C11 moves to a higher position (but not at the maximum value) relative to the reference position P11.

[0095] Preferably, the adjustment system includes a height adjustment stop to limit movement of the ends 41 and 42 along axis R40 between positions shown in 7B (where the distance from R2 is the minimum distance from the center of the connecting rod) and 7C (where the distance from R2 is the maximum distance from the center of the connecting rod), i.e., sliding. Therefore, relative movement of the ends 41 and 42 exists only between these two positions and does not exceed them. For example, to constitute the height adjustment stop, the drive rod end sleeve 45 includes a stop 46 formed by a parallelepiped block threaded into the sleeve, and the drive rod end 44 includes a groove forming two facing shoulders 47 that constitute the border of the stop 46.

[0096] like Figure 7 As shown, in cases 7B and 7C, the stop 46 alternately abuts either shoulder 47, thus limiting the sliding stroke of ends 41 and 42. Figure 7 As shown, for cases 7A and 7D, the stop 46 moves freely between the shoulders 47 to obtain the intermediate value of the distance R2.

[0097] Preferably, the adjustment system includes an amplitude adjustment scale group that indicates the amplitude adjustment value based on the eccentricity distance R1. In this example, for instance, this scale group is marked on the base 31, while the scale markings are marked on the connector 32, and vice versa. Preferably, the adjustment system includes a height adjustment scale group that indicates the amplitude adjustment value based on the center distance R2 of the connecting rod. In this example, for instance, this scale group is marked on the drive rod end 44, while the edge of the drive rod end sleeve 45 serves as a marker.

[0098] In the locking configuration of the adjustment system, particularly when using the loom 1, the eccentric system 30 is rotated about axis X20 relative to the heald frame 12 by actuator 20, causing the heald frame 11 to move via the pull mechanism. When the eccentric system 30 rotates without changing direction, levers 50 and 70 pivot in a oscillating manner, and the heald frame 11 reciprocates. With each complete rotation of the eccentric system 30 about axis X20 relative to the heald frame 12, levers 50 and 70 pivot in one direction, then in the other, and return to their initial positions, while the heald frame 11 travels a stroke C11 in both directions and returns to its initial position. Specifically, when the eccentric system 30 performs its first half-rotation, it drives the heald frame 11 from the lower position B11 to the upper position H11. As the eccentric system 30 continues to rotate without changing direction, it drives the heald frame 11 in the opposite direction from the higher position H11 to the lower position B11.

[0099] Locking system 80 allowed Figure 2 , Figure 6 , Figure 7 as well as Figure 5 The locking configuration shown in scenario 5D and Figure 1 and Figure 5 The loosened configuration is shown in case 5A.

[0100] In the locking configuration, the locking system 80 locks the orientation of all levers 50 of the loom 1 to a reference orientation, preferably corresponding to the case where all heald frames 11 are located at reference position P11. Therefore, all levers 50 are locked in a known orientation, i.e., the reference orientation. Preferably, the reference orientation is selected such that it corresponds to the minimum value of the eccentric distance R1 (e.g., when the distance R1 is at its minimum value). Figure 6 Case 6B) and the maximum value of the eccentricity (as shown in case 6B) Figure 6 The orientation of lever 50 is determined when the distance R2 is between the midpoint of the distance between the center of the connecting rod and the midpoint between the minimum and maximum distances between the center of the connecting rod. A reference orientation is selected that corresponds to the orientation of lever 50 when it is at the midpoint of its pivoting motion, wherein the motor itself is in an angular position corresponding to the midpoint between the two return points of the drive rod 40 during its pivoting cycle.

[0101] In the released configuration, the locking system 80 does not impede the pivoting of the lever 50. Advantageously, the locking system 80 is configured to lock all levers 50. Alternatively, several locking systems 80 may be provided, each ensuring the locking of a set of levers 50 associated with a set of adjacent heald frames or individual levers 50.

[0102] The locking system 80 is configured to be in an open configuration for weaving. The locking system 80 is configured to be in a locked configuration when the adjusting system is in the adjusting configuration. When the locking system locks the pivot of the lever 50 to the reference position, the rotary electric actuator 20 changes the eccentric distance R1 when the adjusting system is in the amplitude adjustment configuration. In fact, with the lever 50 fixed, the rotation of the base 31 caused by the actuator 20 causes a change in the center distance R1 by rotating the base 31 about the axis X32 relative to the connector 32. Figure 6 As shown, by using actuator 20 to move base 31 through a corner sector (preferably less than half a turn), the center distance R1 varies over its entire adjustment stroke. When the locking system pivots lever 50 to the reference orientation, the rotary electric actuator 20 changes the eccentricity distance R2 in the height adjustment configuration. In fact, with lever 50 fixed, the rotation of base 31 caused by actuator 20 causes a change in center distance R2 through the relative sliding of ends 41 and 42. Figure 7 As shown, by using actuator 20 to move base 31 through a corner sector (preferably less than half a turn), the center distance R2 varies over its entire adjustment stroke. Therefore, shed adjustment can be performed via actuator 20, whether the actuator is controlled by an automatic adjustment program or by the operator. Alternatively, the eccentricity distance R1 can be changed by the operator manually rotating base 31. In this alternative, using a scale group may be helpful to the operator.

[0103] In this example, the locking system 80 includes an upper rocker-type stop 81 and a lower rocker-type stop 82. Stop 81 is pivotally actuated relative to the heald frame 12 about axis X81 by actuator 83. The pivoting operates between a stopped position and a released position. In the stopped position, with respect to a first direction of rotation of lever 50, stop 81 restricts the pivoting of lever 50 to a reference orientation by mechanically engaging with lever 50; and in the released position, stop 81 is released from lever 50 so as not to impede the pivoting of lever 50. Stop 82 is pivotally actuated relative to the heald frame 12 about axis X82 by actuator 84, regardless of the orientation of stop 81. Axes X81 and X82 are parallel to axis X20. The pivoting operates between a stopped position and a released position. In the stopped position, with respect to the second rotational direction of lever 50, the stop 82 mechanically engages with lever 50 to restrict the pivoting of lever 50 to a reference orientation. In the released position, the stop 82 disengages from lever 50 so as not to impede the pivoting of lever 50. To mechanically engage with stops 81 and 82, arm 51 of lever 50 includes a lug 53, which abuts one and the other of stops 81 and 82 when the associated stops are in the stopped position. When both stops 81 and 82 are in the stopped position, a locking configuration is achieved because the lug 53 engages between the two stops 81 and 82, locking lever 50 in the reference orientation.

[0104] Preferably, each actuator 20 is a servo motor, or any other type of electric motor that allows control of the orientation of the rotor about axis X20. Specifically, each actuator 20 includes an encoder and / or sensor system whose measurements allow the orientation of the output shaft 28 to be determined, thus implicitly determining the position of the base 31 of the eccentric system 30 about axis X20 relative to the heald frame 12 when the geometry of the system is known. Advantageously, each actuator 20 includes an output plug that can be connected to the network 22 of the loom 1 (e.g., a measurement bus) to transmit the measurements.

[0105] Advantageously, the opening machine 2 includes one or more actuator microcontrollers 23, which control the actuator 20 by controlling a power circuit 21 that distributes electrical energy to the actuator 20, taking into account the measured value of the orientation of the output shaft 28 obtained through the network 22.

[0106] Advantageously, the loom 1 includes a main controller 24 that exchanges data with the actuator microcontroller 23. The main controller 24 can run a weaving program to control the weaving of the loom, control the actuator 20, and can also run other programs, such as adjustment programs, calibration programs, etc. For control purposes, the microcontroller 23 and / or the main controller 24 consider a library containing certain data, particularly significant pre-recorded actuator positions input at the terminal or even through the calibration program. Advantageously, the controller has a memory for the database. The memory is capable of storing current actuator position data or data related to a predetermined position to be reached. For example, the memory can store the position of a rotary actuator corresponding to a stop position against the stop 39 during amplitude adjustment. The controller can recall its memory and position data at any time to execute control steps. In servo control of the actuator, the controller is associated with a computer and a comparator, which allows for the quantization of the movement required to reach the predetermined position. Specifically, given the current position of the actuator, the controller calculates a predetermined angle corresponding to the expected rotation based on the position of the stop to be reached. The memory is configured to input, store, or return this data to the controller.

[0107] Preferably, each actuator 83 and 84 is a servo motor, or any other type of electric motor that allows control of the orientation of stops 81 and 82 about their respective axes X81 and X82. Specifically, each actuator 83 and 84 includes an encoder and / or sensor system, the measurements of which allow determination of the orientation of the associated stop. Advantageously, each actuator 83 and 84 includes an output plug that can be connected to a network 86 (e.g., a measurement bus) of the loom 1 to transmit the measured values. Advantageously, the loom 1 includes one or more actuator microcontrollers 87 that control the actuators 83 and 84 by controlling a power circuit 85 that distributes electrical energy to the actuators 83 and 84, taking into account the measured values ​​of the orientation of the output shaft 28 obtained via the network 86. The main controller 24 exchanges data with the actuator microcontrollers 87.

[0108] Preferably, the loom 1 includes a terminal 25 to allow an operator to control and / or parameterize the operation of the loom 1 via the main controller 24. For example, the terminal 25 suggests specific steps to the operator to begin setting up the program, to verify that manual steps and / or input parameters have been performed. The terminal 25 is used to display information related to program progress and to indicate alarm signals to the user.

[0109] Loom 1 allows implementation as defined below and in Figure 17 The adjustment method shown in the figure, more specifically, allows each opening machine 2 to implement the adjustment method.

[0110] When the loom 1 is first assembled, or during maintenance or calibration operations, for all or some machines 2, the significant angular position of the actuator rotor 20 is recorded, corresponding to the available shed configuration and positioning of the heald frame 11 during the stroke of the heald frame 11. Specifically, when the locking system is in the locked configuration, significant angular positions are recorded corresponding to the heald frame 11 being in positions B11, H11, and P11. Other significant angular positions corresponding to amplitude adjustment and shed height adjustment configurations are also stored, because these configurations can be used by the machine or operator to adjust the adjustment system. Similarly, significant angular positions for each adjustment configuration are stored in memory, corresponding to the different cases of abutment of ends 41 and 42 and abutment of connector 32 relative to the base. Many configurations may exist because the angular position of the actuator 20 reaching the amplitude adjustment stop changes according to height adjustment, and vice versa. This data is stored in a database, which is physically located in the controller memory.

[0111] For example, when lever 50 is in the reference position, the minimum, intermediate, and maximum values ​​of distance R2, the minimum and maximum angular positions of actuator 20 (corresponding to the alternating adjacency of screw 38 and shoulder 39), and the minimum, intermediate, and maximum values ​​of distance R1, the minimum and maximum angular positions of actuator 20 (corresponding to the alternating adjacency of stop 46 and shoulder 47) can be recorded. For example, if it is desired to detect an adjustment fault, the minimum angular position of the actuator is the first target value, or the maximum angular position of the actuator is the second target value, or both the minimum and maximum angular positions are target values.

[0112] Knowing these significant angular positions in advance allows for the subsequent detection of potential faults during the adjustment process or weaving, especially if the angular position at which the actuator 20 stops the traction mechanism does not correspond to the significant angular position expected in the environment under consideration.

[0113] In summary, the actual adjustment method first includes step a, which involves pivoting the lever 50 to a reference position by rotating the eccentric system 30 using a rotary electric actuator 20 when the adjustment system is in a locked configuration and the locking system 80 is in an unlocked configuration. Then, the method includes step b, which involves placing the locking system 80 in a locked configuration, thereby fixing the lever 50 in the reference position. Then, the method includes step c, which involves placing the adjustment system in an adjustment configuration. The adjustment configuration can be an amplitude adjustment configuration or a height adjustment configuration. When adjusting the height and amplitude, adjustments are performed sequentially in the desired order. When the adjustment system is in an amplitude adjustment configuration, the method includes step d1, which involves adjusting the eccentric distance R1 by rotating the eccentric system 30 using a rotary electric actuator 20. This adjustment method uses data from a memory corresponding to a target or incremental value related to the desired heald frame height. With the adjustment system in the height adjustment configuration, instead of step d1, step d2 is provided. Step d2 adjusts the center distance R2 of the connecting rod by rotating the eccentric system 30 using a rotary electric actuator 20. This adjustment method uses data from memory corresponding to a target or incremental value related to the desired heald frame height. Once adjustment is complete, the method includes step e, which involves placing the adjustment system in a locked configuration. Finally, the method includes step f, which involves placing the locking system 80 in a released configuration. The new settings can then be used to perform weaving.

[0114] More specifically, for example, to initiate the adjustment method, the operator may instruct the loom 1 to start the adjustment method via terminal 25.

[0115] To perform steps a and b, when system 80 is in the released configuration, lever 50 is first pivoted to a position close to the reference orientation by actuator 20, controlled by controllers 23 and 24, as follows: Figure 5As shown in case 5A. Then, all lugs 53 are positioned above the stop 82. Advantageously, the actuator 20 is positioned such that the eccentric system 30 is positioned such that the end 41 is in the upper quadrant of the actuator 20's rotation, allowing the operator to access the adjustment system at a later stage. Then, under the action of the actuator 84 controlled by controllers 24 and 87, the stop 82 tilts to the stop position, as shown in case 5B. Then, under the action of the actuator 20 controlled by controllers 23 and 24, the lever 50 pivots until the lever 50 abuts the stop 82, as shown in case 5C. At least for this step, the driving torque of the actuator 20 is limited to a predetermined set torque value. Because the torque is limited in this way, the lever 50 makes contact with the stop 82 without the risk of damage, and the actuator 20 can detect when the lever 50 is at the stop. If actuator 20 is a servo motor, the power supply to actuator 20 is cut off, thus eliminating the motor brake. The weight of the heald frame 11 and the tensioning mechanism keeps lever 50 in contact with stop 82. At this time, the angular position of actuator 20 is stored as an angular position corresponding to the reference orientation of lever 50. Finally, under the action of actuator 83 controlled by controllers 24 and 87, stop 81 tilts to the stop position, as shown in case 5D. In this locking configuration, the assembly formed by the heald frame, connecting rod, lever, and eccentric system is fixed relative to the heald frame 12 of the loom 1.

[0116] In this example, steps a and b are therefore performed fully automatically under the operator's control. As a variation, a manual step is provided, particularly in the case of a non-motorized locking system, where the operator manually tilts stops 81 and / or 82. As a variation, a single actuator tilts both stops 81 and 82 in a time-staggered manner.

[0117] At this stage, advantageously prior to step c, the method includes a so-called locking check step, designed to verify that the locking system 80 effectively secures the lever 50. This step includes restoring power to the actuator 20, limiting it to a set torque value. The locking control step includes step b1, which verifies that the rotary electric actuator 20 does not rotate. This step includes sending a rotary drive command implemented by the actuator 20, in other words, a rotation command for the actuator 20; then, while the actuator 20 has executed the drive command, measuring the rotation angle described by the eccentric system 30. Finally, step b1) includes comparing the measured rotation angle with a target value to determine whether the locking system 80 is correctly in a locked configuration or in a locked failure condition. Preferably, rotation of the actuator 20 in both directions is provided, which allows verification that the two stops 81 and 82 effectively lock the lever 50. In other words, it verifies that the rotary actuator does not rotate when a predetermined torque value is applied, monitoring the transmitted motor torque during this measurement. In practice, to determine that the locking system 80 is properly in the locked configuration, the rotation angle is verified to be zero or nearly zero when the transmitted motor torque is higher than the system's passive torque (approximately twice the torque applied to the motor by the weight of the heald frame and the transmission in the locked configuration), and in the locked configuration, the traction mechanism is typically fully fixed. In this case, the adjustment method continues. Conversely, when the actuator 20 has covered an angle that is not zero or greater than a predetermined threshold, the locking system is considered not to be in the locked configuration. At this point, it is generally known that this is not a locking failure of the adjustment system, but rather because weaving may have been performed previously, the previous adjustment method may have been successfully performed, or the operator has not yet intervened to place the adjustment system in the adjustment configuration. In any case, if the locking system 80 is considered not to be in the locked configuration, step b2 is provided, which includes, for example, issuing an alarm to the operator via terminal 25 indicating a locking failure. The method is then interrupted so that corrective action can be taken. For example, steps a and b, such as pivoting lever 50 and placing lever 50 in the locked configuration, can be repeated. Alternatively, for step b2, the following setting is made: if the system has an electronic locking device capable of following the new locking steps, the controller triggers corrective action.

[0118] Step c, which places the system in the adjustment configuration, is performed manually by the operator. For safety reasons, the following setting is made: when the operator changes the adjustment system from the locked configuration to the adjustment configuration, the power supply to actuator 20 is cut off. In practice, the operator manually unlocks the locking device. In this example, the operator loosens screw 93 but not screw 98 to move to the amplitude adjustment configuration, or loosens screw 98 but not screw 93 to move to the height adjustment configuration. Once in the adjustment configuration, braking devices 91 and / or 92 prevent the traction mechanism from becoming misaligned under its own weight by preventing changes in the already adjustable distance R1 or R2.

[0119] Preferably, the method includes a pre-check step performed after step c and before step d1 or d2 to verify that the desired adjustment configuration has been properly achieved; in other words, the correct screws have been loosened and are indeed loosened. This pre-check includes step c0, which sends a command to rotate the system 30 via actuator 20; in other words, a command to control the rotation of actuator 20. In practice, actuator 20 executes this command until one of the stops is reached for reference. At this point, step c1 is provided, which measures the rotation angle described by the eccentric system 30 that executed the command. Depending on the specific case, this stop corresponds to one of the minimum or maximum values ​​of the connecting rod center distance or eccentricity distance. Then, step c1' is provided, which compares the measured rotation angle with a predetermined angle to determine whether the opening machine 2 is in a nominal condition or a fault condition, the predetermined angle corresponding to the expected rotation based on the stop position, a fault condition such as a loosening fault or an adjustment fault.

[0120] The pre-check then includes step c2, which sends a command via actuator 20 to rotate system 30 in the opposite direction. In other words, it controls actuator 20 to rotate. In practice, actuator 20 executes the command until it reaches another stop. This other stop corresponds to another minimum or maximum value of the center distance or eccentricity of the connecting rod. These commands are sent while actuator 20 is constrained below a set torque value to avoid any risk of damage in the event that the stop is not encountered at the intended angular position, and also to detect the resistance of the stop. The pre-check includes step c3, which measures the rotation angle described by the rotor, in other words, the rotation angle described by the eccentric system 30 after the rotation command is executed, where it is assumed that actuator 20 has driven the pulling mechanism from the first stop to the second stop. The pre-check includes step c4, which compares the measured angle with a target value pre-recorded in a library to determine whether machine 2 is in a nominal condition or a fault condition, such as a loosening fault or an adjustment fault. In other words, the measured angle is compared with a predetermined angle, which corresponds to a rotation that can be expected from the position of the adjusting stop.

[0121] For example, if the measured angle is zero or very small, the adjustment system is identified as still in a locked configuration. This is a release fault. For example, if the measured angle corresponds to an angle within the amplitude adjustment range, the adjustment system is identified as incorrectly set to the amplitude adjustment configuration when the height adjustment configuration is desired. This is another release fault. For example, if the measured angle corresponds to an angle within the height adjustment range, the adjustment system is identified as incorrectly set to the height adjustment configuration when the amplitude adjustment configuration is desired. This is another release fault. For example, if the measured angle corresponds to the sum of the height and amplitude adjustment ranges, the adjustment system is identified as being in a configuration where both distances R1 and R2 are variable by releasing all locking mechanisms of the adjustment system. This is another release fault. For example, if the measured rotation angle does not correspond to the angles described above, this could be an adjustment fault, indicating that the previously executed adjustment method was not performed correctly or that the adjustment system malfunctioned during weaving.

[0122] When a fault is detected, step c5 is provided to issue an alarm, preferably by drawing the operator's attention, for example, through terminal 25, to indicate to the operator that a fault has occurred and the type of fault identified. The adjustment method is interrupted so that corrective actions can be taken, particularly the correct execution of the adjustment configuration steps. Otherwise, the method proceeds directly to adjustment steps d1 or d2.

[0123] Alternatively, a pre-check step can be performed by checking the achievement of a single stop from the expected angular displacement range to the first stop.

[0124] The following settings are made: Lever 50 is locked in the reference orientation by locking system 80, allowing amplitude adjustment step d1 or height adjustment step d2 to be performed by actuating actuator 20. To perform the adjustment, the following settings are made: Actuator 20 is actuated according to a command from the operator (e.g., via terminal 25). For example, the operator can command actuator 20 via terminal 25 to increase the rotation of actuator 20 until the desired amplitude or height setting of stroke C11 is reached. It can also be set that the operator instructs actuator 20 to directly position the output shaft 28 at the target angle value to achieve the desired adjustment. The rotary electric actuator 20 is rotatably controlled according to a target value or incremental value command related to the desired heald frame stroke or heald frame height. In other words, the rotational control of the rotary electric actuator includes sending a target value or incremental value setpoint to the rotary electric actuator 20, the target value or incremental value setpoint being related to increasing or decreasing adjustment from the eccentric distance setpoint R1 or the connecting rod center distance setpoint R2.

[0125] Therefore, the rotary electric actuator 20 is driven to reach a predetermined value. It is also possible to configure the operator to directly instruct the desired adjustment, and then the actuator 20, based on information from a library, is positioned at the angular position required to achieve that adjustment. It is also possible to configure the operator to verify the adjustment using a scale set carried by the traction mechanism. It is also possible to configure the actuator 20 to be automatically operated by the controller 24 to perform adjustments without operator intervention, possibly under operator supervision, whereby the controller 24 executes a pre-recorded adjustment program. Advantageously, to check whether the desired amplitude or height value has been achieved, the terminal 25 indicates the current adjustment based on the angular position information provided by the actuator 20. It is possible to configure all actuators 20 to simultaneously perform adjustments of machine 2, especially if the adjustments are performed automatically based on a pre-recorded adjustment program.

[0126] During the adjustment step (whether step d1 or step d2), the following settings can be made: the motor torque of actuator 20 is limited below the adjusted torque value. To allow the operator to verify the adjustment, the following settings can be made: for safety reasons, the power supply to actuator 20 is disconnected. Once adjustment is performed, the angular position of actuator 20 is stored in a library as the current adjustment for actual machine 2. Subsequently, for example, during a new adjustment method, this adjustment value can be recalled.

[0127] Once height adjustment step d2 is performed, a new amplitude adjustment configuration step c can optionally be provided, followed by a new amplitude adjustment step d1. If amplitude adjustment step d1 is performed first, a new height adjustment configuration step c can be provided, followed by a new height adjustment step d2. As previously seen, a pre-adjustment control step can follow the new adjustment configuration step c. As previously seen, since step c requires manual intervention, the following setting can be made: disconnect the power supply to actuator 20.

[0128] Once adjustment steps d1 and / or d2 are completed, step e, which places the adjustment system in a locked configuration, is performed. This step is performed manually by the operator, who locks the locking device by tightening screws 93 or 98. For safety reasons, it is advantageous to disconnect the power supply to actuator 20 during this step. During step e, the locking system 80 remains in the locked configuration to keep lever 50 fixed. Once step e is completed, distances R1 and R2 are fixed because ends 41 and 42 are securely fixed to each other, and connector 32 is securely fixed to base 31.

[0129] Preferably, once step e, which places the machine in a locked configuration, is completed, a locking control step is implemented to ensure that the machine 2 is properly in a locked configuration after manual intervention by the operator. For this locking control step, the locking system 80 remains in the locked configuration. For this locking control step, power supply to the actuator 20 is restored. Preferably, the torque of the actuator 20 is limited below a regulated torque value. The locking control step includes sending a rotational drive command to the actuator 20, measuring the rotation angle described by the eccentric system 30 as the actuator 20 executes the drive command, and comparing the measured rotation angle with a target value to determine whether the control system is correctly in a locked configuration or in a locked failure state. Preferably, rotation of the actuator 20 in both directions is provided. In other words, step e1 is provided, which verifies that the rotary actuator does not rotate when a predetermined torque value is applied, monitoring the transmitted motor torque during this measurement. In practice, to determine that the regulating system is properly in the locked configuration, the rotation angle is verified to be zero or nearly zero when the transmitted motor torque is greater than the system's passive torque (approximately twice the torque applied to the motor by the weight of the heald frame and the transmission in the locked configuration), and in the locked configuration, the traction mechanism is typically fully fixed. In this case, the regulating method continues. Conversely, when actuator 20 has passed an angle that is not zero or greater than a predetermined threshold, the locking system is considered not to be in the locked configuration. At this point, it is known that this is not a locking failure because the previous steps, more specifically, the regulating steps, have been performed. If the regulating system is considered not to be in the locked configuration, step e2 is provided, which includes, for example, issuing an alarm via terminal 25, preferably to draw the operator's attention, indicating a locking failure. The method is then interrupted so that corrective actions can be taken. For example, step e, which puts the system in the locked configuration, can be restarted, or if the system has an electronic locking device capable of implementing corrective actions, corrective actions can be triggered by the controller.

[0130] To execute step f, which places the locking system in the unlocked configuration, the process is essentially the reverse of steps a and b; in other words, it proceeds from case 5D to case 5A. Figure 5 The steps shown. More precisely, from Figure 5 Starting with situation 5D, advantageously, when the power supply to actuator 20 is cut off, actuator 83 is used to tilt stop 81 to the released position to reach situation 5C. Next, power is supplied to actuator 20, causing it to operate the pulling mechanism to orient lever 50, so that lug 53 moves away from stop 82, resulting in... Figure 5 Case 5B. Finally, stop 82 moves to the released position, so that locking system 80 is fully in the released configuration. Alternatively, step f can be modified according to the design of locking system 80 to potentially include a manual step, as explained above for the step of moving to the locked configuration.

[0131] Optionally, the operator confirms via terminal 25 that the adjustment method has been successfully completed. Then, the new shed settings can be used to begin weaving.

[0132] In the locking configuration of the regulating system and the locking configuration of the locking system, the following settings can be made: a movement command (e.g., an alternating command along one rotational direction and then along the opposite direction) is sent to actuator 20, and the amplitude available for rotor rotation is measured, which is analyzed by controller 24. This amplitude reflects, in particular, the sum of the clearances between lever 50 and eccentric system 30 at the hinge at the level of the bearings of drive rod 40 and lever 50. Knowing the geometry of the relevant shedding machines, controller 24 can interpret this amplitude as mechanical clearance. This operation can be performed for each traction mechanism of the loom. This operation can be performed during the aforementioned locking control steps. Furthermore, the following settings can be made: following the drift of these mechanical clearances during the weaving cycle, and comparing all these measurements between these mechanical clearances and / or by one shedding machine relative to another, to estimate the possible degradation of mechanical components and predict their replacement. Knowing the shed height and shed amplitude of each shedding machine also allows for improvement of the predictive model for damage calculation and instructing the operator on machine performance indicators or utilization rates.

[0133] Alternatively, when a height adjustment configuration is required, the eccentric system 30 is oriented by the actuator 20 so that the screw 93 is in an area inaccessible to the operator, thereby reducing the risk that the operator may accidentally put the adjustment system into the amplitude adjustment configuration by loosening the screw 93.

[0134] Optionally, when the amplitude adjustment configuration is desired, a cover is provided to cover screw 98 to reduce the risk of the operator accidentally placing the adjustment system into the height adjustment configuration by loosening screw 98. Similarly, when the height adjustment configuration is desired, a cover may be provided to cover screw 93.

[0135] As a variation, the actuator 20 is configured to have a braking device embedded in the housing, or the actuator 20 includes a braking gearbox to drive the output shaft 28. These solutions address the problem of fixing the actuator 20 during manual intervention of the machine 2.

[0136] As a variation, as a locking system, the actuator is configured to lock lever 50 instead of tilting stops 81 and 82. Lug 53 of lever 50 is placed directly in a horizontal position and locked by an actuator adapted to act on the wall of lug 53.

[0137] Optionally, the adjustment of the heald frame 11 can be performed iteratively to gradually adjust the magnitude and / or height of the stroke C11, or by taking into account the movement of adjacent heald frames 11 to adjust the magnitude and / or height of the stroke C11.

[0138] As a variation, lever 50 can have different geometries, including: lever 50 having a horizontal arm connected to connecting rod 17, a lower vertical arm connected to connecting rod 60, and an upper vertical arm connected to drive rod 40 about its axis X50. Therefore, the upper position H11 and lower position C11 of the heddle frame 11 are reversed relative to the same motor stroke.

[0139] In a variant not shown, the actuator 20 is mounted upside down on the heddle frame 12.

[0140] As a variation, connecting rods 17 and 18 are connected to the heald frame 11 via crossbeam 14.

[0141] As a variant, the loom is a double loom.

[0142] As a variation, the connector can be translated relative to the base along a radial translation axis fixed relative to the connector, rather than rotated, to change the distance R1.

[0143] As a variation, the height adjustment brake is composed of an elastic yoke that replaces the bracket 96 and spring 92, and applies an elastic force to the transmission rod end 44 to brake the relative sliding of the transmission rod ends 44 and 45.

[0144] As a variation, an automatic device is provided for moving the machine 2 between a locking configuration and an adjusting configuration; the automatic device includes, for example, a motor or an electromagnet.

[0145] As a variation, during weaving, the actuator 20 can be selectively operated in either a clockwise or counterclockwise rotation direction, depending on the weaving to be performed. Specifically, when two actuators 20 perform the same weaving in a weaving configuration during several insertion cycles, one first actuator 20 can operate in a clockwise direction while the other actuator 20 operates in a counterclockwise direction, such that the operation of the two actuators is kinematically balanced. In particular, the movement of the counterweight associated with the eccentric system 30 is symmetrical with respect to the loom, which limits the load in the hinge and protects the loom.

[0146] The methods described above still apply if necessary changes are made to the other embodiments described below.

[0147] Figure 8 A second embodiment is shown, wherein the loom 101 and Figures 1 to 7 The loom is the same as 1, except for the following differences. In the attached drawing, it is given... Figures 1 to 7 Elements providing the same or similar functionality in the embodiments and subsequent embodiments are represented by the same reference numerals.

[0148] for Figure 8In the loom 101, the locking system 80 has been replaced by a locking system 180, which includes a stop 181 instead of stops 81 and 82. To switch between the loosening and locking configurations, the stop 181 is configured to translate along an axis Y181 perpendicular to axes Z11 and X20, for example, under the action of a cylinder (not shown). When the lever 50 is in the reference orientation, the stop 181 is at the level of the lug 53 of the lever 50. The stop 181 includes a groove 182 parallel to axis X20 and opening toward the lever 50; when the locking system 180 is in the locking configuration, the lug 53 is received in the groove 182. In the loosening configuration, the stop 181 is released from the lever 50 by moving rearward relative to the lever 50, and then the groove 182 no longer obstructs the pivoting of the lever 50.

[0149] Figure 9 and Figure 10 The third embodiment of the eccentric system 230 is shown, wherein the loom and Figures 1 to 7 The loom is the same as 1, except that the eccentric system 230 replaces the eccentric system 30. The eccentric system 230 is structurally different from the eccentric system 30, but still performs the same function.

[0150] The eccentric system 230 includes a base 231 and a connector 232.

[0151] Along axis X20, base 231 is arranged between actuator 20 and connector 232. Base 231 is fixed to output shaft 28 of actuator 20 so as to be directly driven by actuator 20 to rotate about axis X20 relative to heald frame 12. Axis X20 is fixed relative to heald frame 12 and relative to base 231. The orientation of output shaft 28 about axis X20 corresponds to the orientation of base 231. Through base 231 as a medium, the entire eccentric system 230 rotates about axis X20 via actuator 20. Through continuous rotation of eccentric system 230, lever 50 is driven by transmission rod 40 according to oscillating pivoting motion. Hinge end 41 of transmission rod 40 is connected to connector 232 so that transmission rod 40 and connector 232 can pivot relative to each other about eccentric axis X41, which is fixed relative to transmission rod 40 and relative to connector 232. The circular flange at the hinge end 41 houses the crank pin 235 belonging to the connector 32, which is pivotally supported within the flange by a bearing 43. Axes X41 and X20 are spaced apart by an eccentric distance R1. When the eccentric system 230 rotates about axis X20, axis X41 rotates about axis X20.

[0152] In this example, to make the eccentric distance R1 adjustable when the adjustment system is in amplitude adjustment configuration, the connector 232 and the base 231 are pivotable relative to each other about an axis X232, referred to as the "crank axis". Axis X232 is fixed relative to the base 231 and relative to the connector 232, and is parallel to axis X20. Axis axes X41 and X232 are not coaxial. When the connector 232 rotates about axis X232 relative to the base 231, axis X41 moves relative to axis X20 along a circular path centered on axis X232, thereby changing the distance R1. In this sense, the connector 232 constitutes a crank relative to the base 231.

[0153] The base 231 is formed by a generally flat segment in a plane perpendicular to axis X20. The base 231 includes a main opening 233 that receives the output shaft 28 of actuator 20, thereby securely fixing the base 231 to the shaft. Several fasteners are also provided, in this example, four screws 234 distributed around axis X20, to ensure that the base 231 is rotatably and securely fixed to the output shaft 28 and / or the rotor of actuator 20.

[0154] In this embodiment, connector 232 includes a retaining ring 294 with two claws radially surrounding the crank axis X232. Base 231 forms a crank pin 295, which is received within the retaining ring 294. The crank pin 295 is presented as a circular-based cylindrical member centered on axis X232 and received within the claws of the retaining ring 294, which has a complementary shape. The crank pin 295 protrudes from a flat portion of base 231 in the same direction as and offset relative to the crank pin 235. A clamping screw 293 ensures that the retaining ring 294 clamps around the crank pin 295, the head of which presses against one claw of 294, and the body of the screw passing through this claw and screwed into the other claw. Advantageously, the screw 293 points in a direction orthogonal to axis X232. Tightening screw 93 facilitates bringing the claws closer together, which allows a centripetal clamping force to be applied to the retaining ring 294 on crank pin 295, thereby generating a tightening torque. Base 231 carries connector 232 via its retaining ring 294 because crank pin 295 is accommodated in retaining ring 294.

[0155] Ring 294, crank pin 295, and screw 293 constitute the locking device of the adjustment system. In effect, by placing screw 293 in the position where ring 294 is tightened around crank pin 295, connector 232 and base 231 can be locked together. In the clamped position, screw 293 clamps ring 294 around crank pin 295 to apply a sufficiently high torque, thereby keeping connector 232 fixed relative to base 231 during weaving. In the locking configuration, screw 293 is thus positioned in the clamped position. In the amplitude adjustment configuration, screw 293 is placed in the position where ring 294 around crank pin 295 is loosened, such that ring 294 and crank pin 295 form a pivotal connection, thereby allowing and guiding connector 232 to pivot about axis X232 relative to base 231.

[0156] Preferably, the adjustment system includes an amplitude adjustment brake (not shown), which is similar to... Figures 1 to 7 The loom 1 is provided and Figure 4 The amplitude adjustment brake is shown in the figure.

[0157] Preferably, Figure 9 and Figure 10 The adjustment system of one embodiment includes an amplitude adjustment stop to limit movement of the connector 232 about axis X232 relative to the base 231 between a position with a minimum eccentricity distance from R1 and a position with a maximum eccentricity distance from R1. For example, to form the amplitude adjustment stop, the connector 232 carries a stop screw 238 parallel to axis X20, such that the head of the screw 238 protrudes from the surface of the connector 232 on one side of the base 231. Figure 10 As best seen in the image, to form the amplitude adjustment stop, the base 231 includes two shoulders 239 surrounding the stop screw 238. The screw 238 alternately abuts one shoulder 239 or the other shoulder 239, thereby limiting the pivoting stroke of the connector 232. The screw 238 moves freely between the shoulders 239 to obtain an intermediate value of the distance R1.

[0158] As a variation, some machines 2 are equipped with an eccentric system 30, while other machines 2 on the same loom are equipped with an eccentric system 230, for example to optimize the space and accessibility of the locking device.

[0159] Figures 11 to 14 The fourth embodiment shows the actuator 320 and the eccentric system 330, wherein the loom and Figures 1 to 7 It is the same as loom 1, except that actuator 320 and eccentric system 330 are specifically designed to replace actuator 20 and eccentric system 30. However, actuator 320 and eccentric system 330 perform the same functions.

[0160] like Figure 13As shown, actuator 320 is an electric motor including stator 326. Stator 326 includes housing 374, which includes a cylindrical wall based on a circle and a mounting plate 373 centered on axis X20. Mounting plate 373 is perpendicular to axis X20, closes the front end of cylindrical wall, and securely attaches stator 326 to heddle frame. Rotor 327 is supported by stator 326 and is rotatable relative to stator 326 about axis X20. Rotor 327 is coaxial with axis X20 and contained within stator 326. Here, the front end of rotor 327 forms output shaft 328 of actuator 320, which extends through mounting plate and to the outside. When actuator 320 is properly powered by power circuit 21, output shaft 328 is driven by rotor 327 to rotate about axis X20.

[0161] Alternatively, as explained above, the rotor and output shaft can be configured as separate, different-axis elements, with the rotor driving the output shaft via a gearbox, and the main axis X20 around which the output shaft rotates being parallel to the rotor's axis of rotation.

[0162] Preferably, according to electrical techniques known to those skilled in the art, each actuator 320 includes a rotary transformer (not shown) comprising a rotary transformer rotor and a rotary transformer stator. Preferably, the rotary transformer rotor is securely fixed to a hollow support attached to the rear end of the output shaft 328, such that a clamping screw 393 passes through the hollow support and the rotary transformer rotor from one side to the other. The rotary transformer stator is securely fixed to the stator frame 374 of the stator 326. The rotary transformer is measured based on the rotation of its rotor within its stator, which allows the position of the base 31 relative to the heddle frame 20 to be determined. Advantageously, the actuator 320 has a means for performing the measurement by retaining the clamping screw 393.

[0163] Preferably, like actuator 20, actuator 320 is configured to perform continuous rotation during weaving, in other words, rotation without changing direction. Preferably, actuator 320 is a servo motor, or any other type of electric motor that allows control of the orientation of rotor 327 about axis X20. Specifically, each actuator 320 includes an encoder and / or sensor system (not shown), whose measurements, based on the same principle as actuator 20, allow determination of the orientation of output shaft 328. Advantageously, each actuator 320 includes an output plug that can be connected to network 22 (e.g., a measurement bus) of the loom 1 to transmit the measured values. The same controller described above is used to drive actuator 320 as it is used to drive actuator 20.

[0164] As in Figure 14 As best viewed in the image, the eccentric system 330 includes a base 331 and a connector 332.

[0165] As in Figure 13 As seen in this embodiment, for compactness reasons, the base 331 and the output shaft 328 are formed from a single integral part. However, it is conceivable that these two elements would be formed from separate parts attached to each other.

[0166] Here, the base 331 forms a disc-shaped plate perpendicular to the axis X20, which is formed at one end of the output shaft 328. Along the axis X20, the base 331 is arranged between the plate 373 of the actuator 320 and the connector 332. The base 331 is rotated about the axis X20 relative to the heald frame 12 directly by the rotor 327 of the actuator 320. The axis X20 is fixed relative to the heald frame 12 and relative to the base 331. With the aid of the base 331, the actuator 320 causes the entire eccentric system 330 to rotate about the axis X20.

[0167] In this embodiment, the connector 332 is formed by a crank pin, such as Figure 15 As shown separately. (See also...) Figure 13 and Figure 14 As can be clearly seen, the eccentric system also includes a flange 336 attached to the connector 332.

[0168] In this example, flange 336 forms a flat component, perpendicular to axis X20 and passing through axis X20. Along axis X20, flange 336 is arranged between base 331 and connector 332. In this example, connector 332 is generally a cylindrical shape based on a circle and centered on axis X41. Axes X41 and X20 are spaced apart by an eccentric distance R1. Connector 332 protrudes relative to flange 336 in a direction away from actuator 320. In this example, connector 332 itself is made by assembling two parts connected by screws, but it is possible to make connector 332 as a single part.

[0169] To facilitate the assembly of connector 332 and flange 336, the following arrangement is advantageously made: connector 332 includes fingers 375, such as in Figure 13 and Figure 15 As seen in the image, the finger-like member 375 is coaxial with the axis X41, protrudes from the connector 332 along the direction of the flange 336, and passes through the opening 376 in the flange 336. Figure 13 and Figure 14 The opening 376 seen in the diagram is advantageously coaxial with axis X41. Furthermore, the flange 336 is secured to the assembly of the connector 332 by means of, for example, fastening devices (e.g., screws, here three screws 337 parallel to axis X41). Figure 14 and Figure 15 In the diagram, these screws 337 are indicated by their axes. Figure 14Three through holes belonging to flange 336 are shown. Figure 15 Three corresponding through holes belonging to connector 332 are shown, through which screws 337 are received for securing flange 336 to connector 332.

[0170] like Figure 11 and Figure 12 As shown, the hinged end 41 of the transmission rod 40 is connected to the connector 332, allowing the transmission rod 40 and the connector 332 to pivot relative to each other about an eccentric axis X41, which is fixed relative to the transmission rod 40 and to the connector 332. A crank pin formed by the connector 232 is housed within the circular flange of the hinged end 41. Figure 14 It does not exist in the text, but it can be found in the text. Figures 11 to 13 and Figure 15 As seen in the image, connector 332 is pivotally supported within end flange 41 via bearing 43.

[0171] In this example, to achieve a variable eccentric distance R1 when the adjustment system is in amplitude adjustment configuration, the connector 332 is supported by the base 331. The connector 332 can not only translate radially relative to the base 331 along the translation axis R332, but also rotate relative to the base 331 about the axis X20. The axis R332 is radial relative to the axis X20; in other words, the axis R332 intersects and is perpendicular to the axis X20. For each position of the connector 332 relative to the base, the axis R332 intersects both the axes X20 and X41. The distance R1 is changed by the translational movement of the connector 332 along the axis R332 relative to the base 331. In effect, the axis X41 is fixed relative to the connector 332, and the axis X20 is fixed relative to the base 331; the change in the relative displacement of these two components separates the axes X20 and X41 by a distance R1.

[0172] To enable the connector 332 to move relative to the base 331 while simultaneously being fixed rotatably and radially relative to the base 331, for example, the flange 336 includes an elliptical opening 377, as shown in... Figure 14 As clearly seen, the eccentric system 330 includes a rod 378. An elliptical opening 377 extends parallel to axis X20 from one side through flange 336 to the other side. The elliptical opening 377 elongates along translation axis R332 and extends along this axis. The rod 378 is coaxial with axis X20 and extends through the elliptical opening 377 to support flange 336 via the elliptical opening 377. The rod 378 supports and guides the sliding of the elliptical opening 377 along axis R332 and the pivoting of the elliptical opening about axis X20.

[0173] Preferably, rod 378 includes a clamping screw 393 and a clamping nut 394, thereby forming a locking device for the adjustment system to selectively fix and allow variation in distance R1. Screw 393 and nut 394 are threaded coaxially with axis X20. Nut 394 is received in an elliptical opening 377, thus acting as a bushing to support sliding and rotation of flange 336 when the adjustment system is in amplitude adjustment configuration. Preferably, by tightening screw 393 and nut, with nut axially supported on the outer edge of elliptical opening 377 along the direction of actuator 320 and head of screw 393 supported on rotor 327 in the opposite direction, the connector 332 is fixed relative to base 331 and rotor by clamping flange 336 along axis X20. Therefore, to obtain amplitude adjustment configuration, screw 393 and nut 394 are loosened, thereby allowing connector 332 to translate and rotate relative to base 331. To achieve the locked configuration, screws 393 and nut 394 are tightened to secure connector 332 to base 331. Additionally, flange 336 is secured to both connector 332 and base 331.

[0174] As in Figure 13 As seen in the diagram, the following advantageous arrangement is made: the screw 393 extends through the actuator 320 such that the head of the screw 393 protrudes at the end of the actuator 320, which is opposite the end of the bearing flange 336. Therefore, the operator has very easy access to the head of the screw 393, and the operator needs to switch the adjustment system between the adjusting and locking configurations by tightening or loosening the screw 393 via the head of the screw.

[0175] Preferably, the adjustment system includes an amplitude adjustment brake, which comprises a spring 391, for example, axially inserted between the rotor 327 and the head of the screw 393. Therefore, even when the screw 393 and nut 394 are loosened, the spring elastically applies an axial force, which, under the action of the nut 394, keeps the flange 336 and the connector 332 slightly axially supported on the base 331. Thus, when the adjustment system is in the amplitude adjustment configuration, the spring 391 engages with the screw 393 and nut 394, braking the movement of the connector 332 relative to the base 331.

[0176] To allow for particularly precise adjustment of the distance R1, while enabling the adjustment as described above and in Figure 17The method shown involves rotating the base 331 for adjustment, with the following setup: the radial translation of the connector 332 relative to the base 331 along axis R332 is influenced by the orientation of the connector 332 about the main axis X20 relative to the base 331. In other words, pivoting the connector 332 and flange 336 about axis X20 relative to the base 331 results in radial translation of the connector 332 and flange 336 relative to the base 331 along axis R332, and vice versa. Therefore, the movement of the connector 332 and flange 336 relative to the base 331, including radial translation and rotation, occurs according to a single trajectory. Advantageously, the initial orientation of the connector 332 relative to the base 331 (e.g., ...) is adjusted by rotating the base 331. Figure 11 As shown, the radial translation position of connector 332 corresponds to the minimum distance R1 between axes X20 and X41. When connector 332 pivots from this initial orientation along the same direction, the radial translation of connector 332 occurs only along axis R332 in one direction, gradually increasing the distance R1 to... Figure 12 The maximum value shown. When connector 332 moves in the opposite direction from Figure 12 When the orientation is rotated as shown, the connector 332 also translates radially in the opposite direction along the axis R332 until it gradually returns to the original position. Figure 11 The minimum distance R1 is shown.

[0177] In order to achieve this radial translation of the orientation of the connector 332 relative to the base 331, the following configuration is made: the base 331 includes a cam groove 379, and the connector 332 includes a follower finger, wherein the follower finger is formed by a finger 375, which is received in the cam groove 379 and is constrained to circulate along the cam groove 379.

[0178] Here, the cam groove 379 is formed by a groove formed on the surface of the base 331 and opening toward the connector 332. The cam groove 379 has a helical shape. In other words, as in Figure 11 , Figure 12 and Figure 14 As can be clearly seen, the cam groove 379 traces a spiral path around axis X20 along the surface of the base 331.

[0179] like Figure 13As shown, the finger 375 protrudes axially from the flange 336 along the direction of the base 331, such that the end of the finger 375 is received in the cam groove 379. In fact, the finger 375 extends through the opening 376 and the flange 336, further extending beyond the flange 336 to reach the groove 379. Therefore, the finger 375 received in the groove 379 is slidably guided along the groove 379 and then constrained to remain on the path depicted by the groove 379. Here, the axis X41 follows the same trajectory as the finger 375 and is coaxial with it. Because the finger 375 engages with the groove 379 to travel along a single path, the radial translation and pivoting of the connector 332 are completely constrained. The opening 376 constitutes a means for positioning the finger follower 375 in the cam groove 379.

[0180] As a variation, the following configuration can be made: the finger follower 375 is integrated with the flange 336.

[0181] The groove 379 includes an end portion 339, which, together with the finger 375, forms an amplitude adjustment stop belonging to the adjustment system. This is because the end portion 339 restricts the movement of the finger 375 along the groove, as shown below. Figure 11 and Figure 12 As shown. As a result, the radial translation of connector 332 is restricted to... Figure 11 The position with the minimum distance R1 value and Figure 12 The positions with the largest distance R1 value are between them.

[0182] More typically, to achieve an amplitude adjustment configuration, the following setup is made: the connector 332 can move relative to the base 331 along a predetermined trajectory via a cam groove and a cam follower carried by these connectors, thereby changing the center distance R1. Here, a locking device is formed by a flange 336, a clamping screw 393, and a clamping nut 394 to fix the position of the connector 332 relative to the base 331 along the cam groove 379, thus achieving a locked configuration. However, another locking device can be provided to fix the position of the connector 332 relative to the base 331. Depending on the chosen solution, the rotation of the connector 332 is not necessarily affected by radial translation.

[0183] Figure 16 The fourth embodiment shows the actuator 420 and the eccentric system 430, wherein the loom and Figures 1 to 7 The loom is the same as 1, except that actuator 420 and eccentric system 430 are specifically designed to replace actuator 20 and eccentric system 30. However, actuator 420 and eccentric system 430 perform the same functions.

[0184] Apart from the differences mentioned below, actuator 420 is the same as actuator 320, and eccentric system 430 is the same as eccentric system 330. Figure 16 The components shown that are identical to those of actuator 320 have the same reference numerals.

[0185] For the eccentric system 430, the finger follower 375 is replaced by the finger follower 475, which is the same as the finger follower 375 except for the following differences. For the eccentric system 430, the cam groove 379 is replaced by the cam groove 479, which is the same as the cam groove 379 except for the following differences.

[0186] Preferably, the finger follower is a nut 489 with a head that protrudes radially relative to the axis X40 and is received in a cam groove 479, which presents a flange that axially engages the head of the nut 489. In other words, the cam groove 479 presents a T-shaped cross-section that is complementary to the head of the nut 489.

[0187] Preferably, in this embodiment, the lever 378 performs the function of the locking device but does not ensure the function of the braking device, while the finger follower 475 and spring 491 described below ensure the function of the braking device but do not ensure the function of the locking device.

[0188] Preferably, the spring 491 is inserted axially, for example, between the connector 332 and the nut 489. Here, the spring 491 is constituted by a spring washer present in the groove of the nut 489. Therefore, even when the rod 378 and the nut 394 are loosened, the spring elastically applies an axial force, which, under the action of the nut 489 engaging with the edge of the cam groove 479, keeps the connector 332 slightly axially supported on the base 331. Thus, when the adjustment system is in the amplitude adjustment configuration, the spring 491 engages with the nut 494, braking the movement of the connector 332 relative to the base 331. In cases where braking is provided by the spring 491, the spring 391 is advantageously unnecessary.

[0189] Alternatively, the spring washer 491 can be positioned below the screw head, rather than in the groove of the nut 489, and the tightening of the screw relative to the nut 489 is used to adjust the braking strength of the washer, in other words, to make the braking torque optimal for maintaining the relative position between the connector 332 and the base 331.

[0190] In a variant not shown, the following configuration can be made: the finger follower 475 ensures both locking and braking functions. In this case, the finger follower 475 is divided into two parts. The finger follower 475 includes a nut 489 and a clamping screw (not shown), but the position of the clamping screw is indicated by reference numeral 488. The clamping screw is screwed into the nut 489 coaxially with axis X40. The clamping screw then exposes a head that can be contacted from the axial surface of the connector 332 to screw into and press against the connector 332. Tightening the clamping screw with the nut 489 such that the head of the clamping screw is in axial contact with the connector 332, and the head of the nut is in axial contact with the edge of the cam groove 479 in the opposite direction, thereby preventing the connector 332 from moving relative to the base 331 by locking. This variant does not require the use of the lever 378 for locking. In the case where locking is ensured by the finger follower 475 as described above, the following configuration can be made: the screw 393 and nut 394 of the lever 378 are not used as means of adjusting the locking amplitude system. During braiding and adjustment, screws 393 and nuts 394 are loosened to allow movement of flanges 336 and connectors 332 relative to base 331, through the engagement of rod 378 with elliptical opening 377. Advantageously, a cover 499 is then provided to prevent the operator from accessing the screw head of rod 378.

[0191] In this variant, in the amplitude adjustment configuration, the clamping screw and nut 489 are loosened, allowing the finger follower 475 to travel in the cam groove 479, thus allowing adjustment of the center distance R1 in a manner similar to that of the finger follower 375. In the locking configuration, the clamping screw and nut 489 are tightened, fixing the connector 332 relative to the base 331. Therefore, the finger follower 475 provides a locking mechanism for the amplitude adjustment system.

[0192] For this variant, the following configuration can be made: the actuator 420 includes a rotary transformer through which the clamping screw 393 passes.

[0193] Where technically possible, any feature described above with respect to one embodiment or variation may be implemented in other embodiments and variations.

Claims

1. A shedding machine (2) for operating the heald frame (11) of a loom (1; 101) according to a reciprocating stroke (C11) along the heald frame axis (Z11), the shedding machine (2) comprising: - Rotary electric actuator (20; 320); - Controller (23), the controller being adapted to control the rotary electric actuator (20; 320); - An eccentric system (30; 230; 330), the eccentric system comprising: ◆The base (31; 231; 331), through which the rotary electric actuator (20; 320) drives the eccentric system (30; 230; 330) to rotate about the main axis (X20) perpendicular to the heald frame axis (Z11), and ◆ Connector (32; 232; 332), the connector defining an eccentric axis (X41) parallel to the main axis (X20); - A lever (50) that pivots oscillatingly about a lever axis (X50) to actuate the heald frame (11), the lever axis (X50) being parallel to the main axis (X20); and - Transmission rod (40), the transmission rod comprising: ◆ First hinge end (41), the transmission rod (40) is connected to the connector (32; 232; 332) through the first hinge end, such that the eccentric system (30; 230; 330) and the transmission rod (40) can pivot relative to each other about the eccentric axis (X41), the eccentric axis (X41) and the main axis (X20) being spaced apart by an eccentric distance (R1), and ◆Second hinge end (42): The transmission rod (40) is connected to the lever (50) through the second hinge end, so that the lever (50) and the transmission rod (40) can pivot relative to each other about a transmission rod axis (X42) parallel to the main axis (X20), the transmission rod axis (X42) and the eccentric axis (X41) being spaced apart by a transmission rod center distance (R2). The opening machine (2) is characterized in that it comprises: - An adjustment system, the adjustment system including locking devices (93, 98; 293, 98; 393, 394, 98) and allowing: ◆At least one of the following adjustment configurations: ◇Amplitude adjustment configuration, in which the locking devices (93, 98; 293, 98; 393, 394, 98) allow the connectors (32; 232; 332) to move relative to the base (31; 231; 331), such that the eccentric distance (R1) is adjustable, and ◇Height adjustment configuration, in which the locking devices (93, 98; 293, 98; 393, 394, 98) allow the second hinge end (42) to move relative to the first hinge end (41), such that the center distance (R2) of the transmission rod is adjustable; and ◆Locking configuration, in which the eccentric distance (R1) and the center distance (R2) of the transmission rod are fixed because the locking device (93, 98; 293, 98; 393, 394, 98) is configured such that the connector (32; 232; 332) is securely fixed to the base (31; 231; 331) and the first hinge end (41) is securely fixed to the second hinge end (42); and - A locking system (80; 180) that allows for a locking configuration and a releasing configuration, wherein in the locking configuration, the locking system (80; 180) locks the position of the lever (50) when the lever (50) is in a reference position, and in the releasing configuration, the locking system (80; 180) allows the lever (50) to pivot.

2. The opening machine (2) according to claim 1, wherein, The locking system (80) includes stops (81, 82; 181) that mechanically engage with the lever (50) to lock the pivoting of the lever (50) and that release from the lever (50) to allow the pivoting of the lever (50).

3. The opening machine (2) according to claim 1, wherein, In order for the eccentric distance (R1) to be adjustable when the adjustment system is in the amplitude adjustment configuration, the connector (32; 232) and the base (31; 231) are pivotable relative to each other about the crank axis (X32; X232), which is fixed relative to the base (31; 231) and relative to the connector (32; 232), and parallel to the main axis (X20).

4. The opening machine (2) according to claim 3, wherein, The connector (32) includes a crank pin (95) coaxial with the crank axis (X32), and the base (31) includes a retaining ring (94) for receiving the crank pin (95), the base (31) carrying the connector (32) by means of the crank pin (95) received in the retaining ring (94).

5. The opening machine (2) according to claim 3, wherein, The base (231) includes a crank pin (295) coaxial with the crank axis (X232), and the connector (232) includes a retaining ring (294) for receiving the crank pin (295), and the base (231) carries the connector (232) by means of the crank pin (295) received in the retaining ring (294).

6. The opening machine (2) according to any one of claims 4 or 5, wherein, The locking device (93, 98; 293, 98) includes a clamping screw (93; 293). - In the locking configuration of the adjustment system, the clamping screw is in a clamping position around the crank pin (95; 295) with the locking ring (94; 294) to secure the connector (32; 232) to the base (31; 231), and - In the amplitude adjustment configuration of the adjustment system, the clamping screw is in a released position that releases the retaining ring (94; 294) surrounding the crank pin (95; 295) to allow the connector (32; 232) to pivot relative to the base (31; 231) by pivoting the crank pin (95; 295) in the retaining ring (94; 294).

7. The opening machine (2) according to any one of claims 1 or 2, wherein, The base (331) includes a cam groove (379) defining a helix about the main axis (X20), and the connector (332) includes a finger follower (375) that travels along the cam groove (379) to guide the connector (332) relative to the base (331) when the adjustment system is in an amplitude adjustment configuration and thus changes the eccentricity distance (R1).

8. The opening machine (2) according to claim 7, wherein, The eccentric system (330) includes: - A flange (336) extending perpendicular to the main axis (X20) and comprising: ◆A device (376) for positioning the finger follower (375) in the cam groove (379), and ◆ An elongated elliptical opening (377) along the translation axis (R332); and - Rod (378), which is coaxial with the main axis (X20) and is received in the elliptical opening (377) to support the flange (336) through the elliptical opening (377).

9. The opening machine (2) according to claim 8, wherein: - The locking device (393, 394, 98) includes a clamping screw (393) and a clamping nut (394) forming the rod (378), the clamping screw (393) and the clamping nut (394) being tightened together along the main axis (X20); - In the locking configuration of the adjustment system, the flange (336) is securely fixed to the base (331) by screwing the clamping screw (393) into the clamping nut (394), and the flange (336) is axially clamped onto the base (331) so that the connector (332) is fixed relative to the base (331) along a helical path, thereby fixing the eccentricity (R1); and - In the amplitude adjustment configuration, the connector (332) is allowed to move relative to the base (331) by loosening the clamping screw (393) of the clamping nut (394).

10. The opening machine (2) according to any one of claims 1 to 5, wherein, The transmission rod (40) includes a first transmission rod end (44) carrying the first hinge end (41) and a second transmission rod end (45) carrying the second hinge end (42). The first transmission rod end (44) and the second transmission rod end (45) are slidably inserted relative to each other along the sliding axis (R40), such that the center distance (R2) of the connecting rod is adjustable.

11. The opening machine (2) according to any one of claims 1 to 5, wherein, The adjustment system includes an adjustment stop among the following adjustment stops: - Amplitude adjustment stop (38, 39; 238; 239; 339, 375), when the adjustment system can be placed in the amplitude adjustment configuration, the amplitude adjustment stop restricts the movement of the connector (32; 232; 332) to limit the variation of the eccentric distance (R1) between a predetermined minimum eccentric distance value (6B) and a maximum eccentric distance value (6C); as well as - Height adjustment stop (46, 47), when the adjustment system can be placed in the height adjustment configuration, the height adjustment stop restricts the movement of the second hinge end (42) to limit the variation of the center distance (R2) of the connecting rod between a predetermined minimum center distance value (7B) and a predetermined maximum center distance value (7C).

12. The opening machine (2) according to any one of claims 1 to 5, wherein, The regulating system includes at least one of the following brakes: - Amplitude adjustment brake (91; 391), the amplitude adjustment brake being configured to maintain the connector (32; 232) when a defined relative displacement force is applied, while the adjustment system is in amplitude adjustment configuration. 332) Position relative to the base (31; 231; 331); and - A height adjustment brake (92) configured to maintain the position of the second hinge end (42) relative to the first hinge end (41) when the adjustment system is in the height adjustment configuration and a predetermined relative displacement force is applied.

13. The opening machine (2) according to any one of claims 1 to 5, wherein, The adjustment system includes at least one of the following scale groups: - An amplitude adjustment scale group, wherein the amplitude adjustment scale group indicates the amplitude adjustment value according to the eccentricity distance (R1); and - Height adjustment scale group, the height adjustment scale group is adjusted according to the center distance (R2) of the connecting rod.

14. The opening machine (2) according to any one of claims 1 to 5, wherein, The controller (23) is capable of controlling the rotary electric actuator (20) to change the eccentric distance (R1) in the amplitude adjustment configuration or to change the center distance (R2) of the connecting rod in the height adjustment configuration.

15. A loom (1; 101) comprising a shedding machine (2) according to any one of claims 1 to 5 and a heald frame (11) operated by said shedding machine (2).

16. A method for adjusting an opening machine (2), wherein the opening machine is the opening machine according to claims 1 to 5, the adjustment method comprising: - Step (a), when the adjustment system is in the locked configuration and the locking system is in the released configuration, the lever (50) is pivoted to the reference orientation by rotating the eccentric system (30; 230; 330); - Step (b): Place the locking system in the locking configuration; - Step (c): Place the adjustment system in the adjustment configuration; as well as - When the adjustment system is in the amplitude adjustment configuration, the adjustment step (d1) is to adjust the eccentric distance (R1) by rotating the eccentric system (30; 230; 330) by a predetermined value, and the adjustment step (d2) is to adjust the center distance (R2) of the connecting rod by rotating the eccentric system (30; 230; 330) by a predetermined value when the adjustment system is in the height adjustment configuration.

17. The adjustment method according to claim 16, wherein, For the adjustment steps (d1, d2), the rotation of the eccentric system (30; 230; 330) is performed by rotatably controlling the rotary electric actuator (20; 320).

18. The adjustment method according to claim 17, wherein, The rotary electric actuator (20; 320) is rotaryly controlled according to a target or incremental value related to the desired heald stroke or desired heald height.

19. The adjustment method according to claim 16, wherein, The adjustment system includes an adjustment stop among the following adjustment stops: -Amplitude adjustment stop (38, 39; 238, 239; 339, 375), when the adjustment system can be placed in the amplitude adjustment configuration, the amplitude adjustment stop restricts the movement of the connecting member (32; 232; 332) to limit the variation of the eccentric distance (R1) between a predetermined minimum eccentric distance value (6B) and a maximum eccentric distance value (6C); as well as - Height adjustment stops (46, 47), when the adjustment system can be positioned in the height adjustment configuration, restrict the movement of the second hinge end (42) to limit the variation of the connecting rod center distance (R2) between a predetermined minimum connecting rod center distance value (7B) and a predetermined maximum connecting rod center distance value (7C). The adjustment method includes a pre-check step, which is performed after step (c) of placing the adjustment system in the adjustment configuration and before the adjustment steps (d1, d2). The pre-check step includes: - Step (c2) requests the rotary electric actuator (20; 320) to rotate along the first rotation direction until it reaches the adjusting stop (38, 39; 238; 239; 339; 375; 46, 47); - Step (c3), measure the first rotation angle described by the eccentric system (30; 230; 330) reaching the adjusting stop (38, 39; 238, 239; 339, 375, 46, 47); - Step (c4): Compare the measured first rotation angle with a predetermined first angle to determine whether the opening machine (2) is in a nominal condition or a fault condition, the predetermined first angle corresponding to the expected rotation from the position of the adjusting stop (38, 39; 238, 239; 339, 375, 46, 47), the fault condition being, for example, a loosening fault or an adjustment fault; and - Step (c5): If it is determined that the opening machine (2) is in the fault condition, an alarm is issued.

20. The adjustment method according to claim 19, wherein, Before step (c2) of requesting the rotary electric actuator (20; 320) to rotate along the first rotation direction, the pre-check includes: - Step (c0) requests the rotary electric actuator (20; 320) to rotate in a direction opposite to the first rotation direction until it reaches the adjusting stop (38, 39; 238; 239; 339; 375; 46, 47); - Step (c1), measuring the second rotation angle described by the eccentric system (30; 230; 330) reaching the adjusting stop (38, 39; 238, 239; 339, 375, 46, 47); and - Step (c1') compares the measured second rotation angle with a second predetermined angle to determine whether the opening machine (2) is in a nominal condition or a fault condition, the second predetermined angle corresponding to the expected rotation from the position of the stop, the fault condition being, for example, a loosening fault or an adjustment fault.

21. The adjustment method according to claim 16, wherein, Following the adjustment steps (d1, d2), the adjustment method sequentially includes: - Step (e), placing the adjustment system in a locked configuration; and - Step (f): Place the locking system in the released configuration.

22. The adjustment method according to claim 16, wherein, The adjustment method includes a lock check step between step (b) of placing the locking system in the lock configuration and step (c) of placing the adjustment system in the adjustment configuration, the lock check step including: - Step (b1), checking that the rotary actuator does not rotate when a predetermined torque value is applied; and - Step (b2): If rotational movement of the rotary electric actuator (20; 320) is detected, an alarm indicating a locking fault is issued.

23. The adjustment method according to claim 21, wherein, The adjustment method includes a lock check step between a step of being placed in a locked configuration (e) and a step of being placed in a released configuration (f), the lock check step including: - Step (e1): Check that the rotary electric actuator does not rotate when a predetermined torque value is applied; and - Step (e2): If rotational movement of the rotary electric actuator (20; 320) is detected, an alarm indicating a locking fault is issued.

24. The adjustment method according to claim 16, wherein, The adjustment method includes cutting off the power supply to the rotary electric actuator (20; 320) during step (c) of the adjustment configuration.

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