EP3098370B1 - Motor-driven closure device comprising a system for automatic locking and unlocking of a shutter - Google Patents

Description

The present invention relates to a motorized closing device for an opening that comprises the masonry of a construction, such a device comprising a flap and a locking system and automatic release of the flap.

The invention relates to the field of the building and, more particularly, that of the manufacture of devices designed to ensure the closure of an opening that includes the masonry of a construction, in particular the manufacture of motorized closing devices comprising at least flap shutter .

There are already known closure devices which comprise at least one flap flap and motorized means for driving in rotation of such flap shutter.

Thus, the document DE9418875U1 discloses such a closure device in which the motorized drive means comprise, on the one hand, a motor fixed on the masonry and, on the other hand, means for transmitting a rotational movement generated by the motor to a motor. flap shutter. Such transmission means comprises, on the one hand, a shaft engaged with said flap flap and, on the other hand, a gear train interposed between said motor and said shaft. These motorized drive means make it possible to ensure the opening and closing of the swing shutter but, also, the maintenance of such a swing flap in the closed position. In this connection, it will be observed that these motorized drive means are, however, in no way capable of withstanding a constraint exerted on such a flapping shutter in the context of an attempted break-in.

The document FR-2717210 discloses a motorized closing device of an opening that comprises the masonry of a construction. This motorized closure device comprises a swing flap as well as motorized means for driving this flap shutter. In fact, these motorized drive means comprise, on the one hand, a motor secured to the frame and, on the other hand, an arm, rotated by said motor, and having a first end engaged with it. engine and a second end provided with a sliding roller inside a slide fitted to the inner side of the flap. This motorized closure device further comprises an automatic locking and unlocking system of the swing shutter. This automatic locking and unlocking system comprises, on the one hand, an articulated lever, associated with the slide, and actuated by the roller, on the other hand, a flexible link having a first end connected to the articulated lever and, still another, a pivoting catch, connected to a second end that has the flexible link, subjected to a tension spring, and cooperating with a stop equipping the frame to immobilize the swing flap in the closed position.

A first disadvantage of this closure device is that it comprises an engine that it is necessary to position and fix carefully and accurately on the frame, so as to allow the appropriate opening and closing of the shutter beating. Another disadvantage is that, to allow this opening and closing, it is necessary to use an arm which has a bent shape. Such an angled shape gives this arm a large footprint that requires a frame thick, this to allow positioning of the arm between, on the one hand, a door or a window and, on the other hand, the flap , this in the closed position of this flap flap. Yet another disadvantage is that this closure device comprises a large number of parts, which is more mobile relative to each other. The multiplicity of these parts and their mobility require complex dimensioning and adjustment of these parts and lead to an increased risk of failure of the device. closing. In addition, these parts are arranged so that, in the open position of the flap, they are subjected to weather, degradation and fouling which, again, increases the risk of failure.

The present invention aims to overcome the disadvantages of finishing devices of the state of the art.

To this end, the invention relates to a motorized closing device of an opening that includes the masonry of a building. This closing device comprises, on the one hand, a swinging shutter, on the other hand, motorized means for driving the swing shutter, these motorized drive means comprising a motor, and, on the other hand, a system automatic locking and unlocking of the swing shutter. This system comprises, on the one hand, locking means capable of adopting an active locking position of the swing flap and an inactive locking position of this flap and, on the other hand, control means, connected to the motorized means. driving the flap shutter, and designed to control the passage of the locking means from an active locking position to an inactive locking position. This motorized closing device is characterized in that it comprises means for mounting the motor for mounting the motor moving relative to the flap, this in a limited stroke, and that it is configured so that the actuation motorized drive means is translated, on the one hand and initially, by a movement of the motor to abut against means to limit the stroke while, under the impetus of the displacement of the motor, the control means control the passage of the locking means to the inactive locking position and, secondly and in a second step, by the opening of the swing flap.

Another feature is that the flap comprises the engine and said mounting means of the engine.

Yet another characteristic relates to the fact that the engine mounting means are constituted by means of mounting this engine moving within the flap.

An additional feature is that the flap comprises a tubular section having, internally, a housing inside which is mounted the motor, this displacement relative to this tubular section, inside this housing, and by via the mounting means of this engine.

Another characteristic relates to the fact that, on the one hand, the motor comprises a stator and a rotor movable relative to the stator, this being rotated about an axis and, on the other hand, the engine mounting means are constituted by means of mounting the stator of this motor in rotation about the axis of rotation of the rotor of this motor, this in a limited stroke.

Another feature is that the locking means comprise, on the one hand, a striker intended to be secured to a masonry, on the other hand, a bolt, intended to be secured to the flap, and movable between the inactive locking position and the active locking position in which the bolt cooperates with the striker.

An additional feature is that the system comprises means for mounting the bolt for mounting the bolt in displacement, in particular in translation, at least with respect to the flap.

Yet another characteristic consists in that the system comprises connecting means for connecting the locking means and the control means, these connecting means comprising, on the one hand, an oblong opening associated with said locking means and, on the other hand, a member, which comprises the control means, and which slides inside the oblong opening.

Another feature is that the device comprises means for mounting the flap to mount the flap flap on the masonry, this in rotation about an axis. The motor mounting means are, then, constituted by means for mounting the motor in rotation about an axis parallel to the axis of rotation of the flap.

As regards the motorized drive means, these comprise, on the one hand, the engine that comprises the flap flap, on the other hand, meshing means, which comprises the flap flap, which are movable in rotation about an axis, and which are driven by said motor in rotation about this axis and, on the other hand, complementary meshing means, intended to be solidly fixed to the masonry, and designed to cooperate with the meshing means. The motor mounting means are then constituted by means for mounting the motor in rotation about an axis at least parallel to the axis of rotation of the meshing means.

Thus, the invention relates to a motorized closure device comprising a locking system and automatic unlocking a flap. This system comprises means for locking this flap flap as well as control means, automatically, these means of locking by the motor of the motorized drive means of the flap flap.

In fact, this motor of the motorized drive means is movable in displacement relative to the swing flap while the locking and unlocking system is designed to control the locking means, this under the impetus of moving the motor of these means motorized drive relative to the swing shutter. This allows, advantageously and under the effect of the actuation of these motorized drive means, to cause the displacement of the motor of these motorized drive means which, under the effect of this movement, control the locking means, more particularly the passage of the locking means of an active locking position to an inactive locking position, thus unlocking these locking means.

Other objects and advantages of the present invention will become apparent from the following description. relating to embodiments which are given only as indicative and non-limiting examples.

• la figure 1 est une vue schématisée, de dessus et en coupe, d'un dispositif de fermeture conforme à l'invention ;
• la figure 2 est une schématisée, en coupe, partielle et de côté du dispositif de fermeture illustré figure 1.

The understanding of this description will be facilitated by reference to the appended drawings in which:

• the figure 1 is a schematic view, from above and in section, of a closure device according to the invention;
• the figure 2 is a diagrammatic, sectional, partial and side of the illustrated closure device figure 1 .

The present invention relates to the field of the building and, more particularly, that of the manufacture of closing devices 1 designed to ensure the closure of an opening O that comprises the masonry M of a construction.

Such a closure device 1 comprises at least one swing flap 2 which may comprise a panel 20 and a frame 21, within which said panel 20 extends, and constituted by an assembly of a plurality of profiles 22. .

At least one of these profiles 22 is of tubular type and has, internally, a housing 23.

Such a flap 2 can, at least in part, be made of aluminum. In particular, at least one profile 22 (or all of the profiles 22) that includes the frame 21 of such a flap 2, or even the panel 20 of such a flap 2, can then be made in aluminum.

The closure device 1 also comprises means 3 for mounting the flap 2 to mount the flap 2 on the masonry M of the construction, this in rotation about an axis 4, usually vertical.

The mounting means 3 of such a flap 2 comprise, on the one hand, a hinge 30 intended to be fixedly secured to the masonry M, in particular by sealing, screwing or otherwise and, on the other hand, a hinge 31 , made integral with the flap 2 (in particular by screwing), and mounted on the hinge 30, this in rotation along the axis of rotation 4 of the flap flap 2.

The closure device 1 is of motorized type and comprises motorized drive means 5 of the shutter 2, this in rotation about the aforementioned axis of rotation 4 of this flap 2.

These motorized drive means 5 comprise, on the one hand, a motor 50, which comprises the flap flap 2, and which is, more particularly, housed inside the housing 23 that includes the tubular section 22 or one tubular profiles 22 of the frame 21 of the flap 2. Such a motor 50 comprises a stator and a rotor movable relative to the stator, this in rotation about an axis.

On the other hand, these motorized drive means 5 comprise meshing means 51, which comprises the flap flap 2, which are movable in rotation about an axis 510, and which are driven by said motor 50 (more particularly by the rotor of this motor 50) rotated about this axis 510. This axis 510 is preferably parallel to the axis 4 about which the flap 2 is movable in rotation. This axis 510 corresponds, more particularly, to the axis of rotation of the rotor relative to the stator.

On the other hand, these motorized drive means 5 comprise complementary meshing means 52 intended to be fixedly fixed to the masonry M and designed to cooperate with the meshing means 51.

In this regard and according to a first embodiment not shown, the meshing means 51 may comprise notches while the complementary meshing means 52 may comprise teeth.

In such a case, the meshing means 51 may be constituted by a notched wheel while the complementary meshing means 52 may be constituted by a circular toothed sector, in particular that comprises at least a portion of disc.

However, according to a preferred embodiment, the meshing means 51 comprise teeth while the complementary meshing means 52 comprise notches or (and preferably) teeth.

In fact, the meshing means 51 are preferably constituted by a toothed wheel (in particular in the form of a pinion or the like as visible figures 1 and 2 ), more particularly having teeth as mentioned above. The complementary meshing means 52 are then constituted by a notched circular sector or (and preferably as visible figures 1 and 2 ) by a toothed circular sector, in particular that comprises at least a portion of disk. Such notched circular sector, respectively toothed, then comprises notches, respectively teeth, as mentioned above.

Another characteristic is that, on the one hand, the teeth and / or the toothed wheel meshing means 51 and, on the other hand, notches, teeth, the notched circular sector or the toothed circular sector of complementary meshing means 52 extend in a plane perpendicular to the axis of rotation 4 of the swing flap 2.

Another feature is that the notched circular sector, respectively toothed, complementary meshing means 52 has a center through which the axis of rotation 4 of the swing flap 2 passes.

An additional feature is that the closure device 1 further comprises securing means for making the complementary meshing means 52 (more particularly the notched or toothed circular sector, or even said at least one portion of disk) fixedly secured to the masonry M.

According to a particular embodiment, these securing means are constituted by at least one sealing member (of the toothed or notched circular sector, or even of said at least one disk portion) in the masonry M.

However, according to another embodiment, these securing means comprise means for fixing the complementary meshing means 52 (more particularly of the notched or toothed circular sector, or even of said at least one disk portion) on said hinge 30. Also through, on the one hand, the fixing of these complementary meshing means 52 on said hinge 30 and, on the other hand, the fixing of the hinge 30 on the masonry M, these complementary meshing means 52 (more particularly the notched circular sector or toothed, or even said at least one portion of disk) are fixed solidarity of this masonry M.

Another feature is that the closure device 1 comprises means for mounting the motorized drive means 5 of the swing flap 2 to mount these motorized drive means 5 of the swing flap 2 moving relative to the flap 2 , this according to a limited race.

In fact, these mounting means of the motorized drive means 5 are, more particularly, constituted by motor mounting means 50 (which comprise these motorized drive means 5 of the flap flap 2) for mounting the motor 50 in displacement compared to this flap 2, this in a limited race.

In this regard, it will be observed that it is, more particularly, the swing flap 2 which comprises said motor 50 as well as such means for mounting the motorized drive means 5 in displacement, more particularly such motor mounting means 50. moving.

In fact, these means for mounting the motorized moving drive means 5 are designed to ensure mounting of these motorized drive means 5 in displacement at least partly inside the flap flap 2, more particularly at least in part. part inside a housing 23 as described above.

As visible on the figure 2 and as mentioned above, it is, more particularly, the motor 50 of these motorized drive means 5 which is then mounted inside the flap flap 2 (in particular inside a housing 23 of a profile tubular 22 of the flap flap 2) while the meshing means 51 extend outside this flap flap 2, in particular below it ( figure 2 ).

Thus the motor mounting means 50 are constituted by means for mounting this motor 50 moving within said flap flap 2.

As mentioned above, the flap 2 comprises a tubular section 22 having, internally, a housing 23. It is more particularly inside this housing 23 that the motor 50 is mounted, this being displaced by relative to this tubular section 22, inside this housing 23, and through the mounting means of this motor 50.

Also as mentioned above, the motor 50 comprises a stator and a rotor movable relative to the stator, this in rotation about an axis. The motor mounting means 50 are then constituted by means for mounting the stator of the motor 50, this in rotation about the axis of rotation of the rotor of the motor 50 and in a limited stroke.

As mentioned above, the closure device 1 comprises means for mounting the swing shutter 2 to mount the flap flap 2 on the masonry M, this rotating about an axis 4.

Also, the means for mounting the motorized drive means 5 in displacement are constituted by mounting means (of these motorized drive means 5) in rotation about an axis parallel to the axis 4 of rotation of the flap 2 .

More specifically, the motor mounting means 50 (which comprise these motorized drive means 5) in displacement relative to the flap 2 are constituted by means for mounting the motor 50 in rotation about an axis parallel to this 4 axis of rotation of the flap 2.

Alternatively or (and preferably) additional, these mounting means motorized drive means 5 (more particularly the motor 50 that comprise these motorized drive means 5) in displacement relative to the flap 2 can be constituted by mounting means (of these motorized drive means 5, more particularly of the motor 50) rotating about an axis parallel to (and even preferably coincides with) the axis of rotation 510 of the meshing means 51 and / or about an axis parallel to (and preferably coinciding with) the axis of rotation of the stator of the motor 50.

In fact, these mounting means in displacement (respectively in rotation) of the motorized drive means 5 are, more particularly, constituted by means of mounting in displacement (respectively in rotation) of the motor 50 of these motorized drive means 5 , including the stator that includes this motor 50.

As mentioned above, the mounting means provide a displacement mounting motorized drive means 5 in a limited stroke.

To do this, the closure device 1 (more particularly the flap 2) comprises means 6 for limiting such a stroke, more particularly in the form of at least one stop (60; 60 ').

Another feature of the closure device 1 is that it comprises a system 7 for locking and unlocking.

This system 7 is designed to ensure the automatic locking and unlocking of the swing shutter 2 of the motorized closing device 1.

In fact, this locking and unlocking system 7 comprises locking means 8 able to adopt an active locking position of the flap 2 ( figures 1 and 2 ) and an inactive locking position of this flap flap 2.

As can be seen in the appended figures, these locking means 8 comprise, on the one hand, a striker 80 intended to be secured to a masonry M (or to another flap 2 which comprises the closure device 1 ), on the other hand, a bolt 81, intended to be secured to the flap flap 2, and movable between the inactive locking position and the active locking position in which the bolt 81 cooperates with the striker 80.

In order to ensure the mobility of the bolt 81, the locking and unlocking system 7 (and, therefore, the closing device 1) also comprises means 9 for mounting said bolt 81 to mount the bolt 81 while traveling at the same time. less compared to the flap 2.

Such mounting means 9 of this bolt 81 in displacement are constituted by translation mounting means of said bolt 81.

In fact, these mounting means 9 of the bolt 81 in displacement are designed to ensure such a translation in a direction parallel to the plane in which the flap flap 2 extends and / or perpendicular to the axis of rotation 4 of the flap 2 and / or perpendicular to the axis of rotation 510 of the meshing means 51.

In addition, these mounting means 9 of the bolt 81 in displacement are designed to ensure such a translation in the direction of the striker 80, this in the locking position and / or closing the flap 2.

As can be seen in the appended figures, these mounting means 9 of the bolt 81 in displacement comprise, on the one hand, a slide 90 intended to be secured to the flap 2 and, on the other hand, a slide 91, which comprises the bolt 81 or which is secured to the bolt 81, and which is slidably mounted relative to the slide 90.

In addition, these mounting means 9 of the bolt 81 moving relative to the flap 2 are positioned inside this flap flap 2, more particularly inside a housing 23 of a tubular section 22 that comprises the frame 21 of this flap flap 2.

Another characteristic consists in that the locking and unlocking system 7 comprises control means 10, on the one hand, intended to be connected to the motorized drive means 5 of the swing flap 2 (more particularly to the motor 50 of these motorized drive means 5) and, on the other hand, designed to control the passage of the locking means 8 (more particularly the latch 81) of an active locking position ( figures 1 and 2 ) at an inactive locking position, this under the impulse of a displacement of these motorized drive means 5 (more particularly of the displacement, in particular in rotation, of the motor 50 as described above) of the swing flap 2.

Such control means 10 take the form of a rod, bar, rod or the like.

Another characteristic consists in that the locking and unlocking system 7 (thus, the closing device 1) comprises connecting means 11 for connecting the locking means 8 and the control means 10.

In fact, these connecting means 11 are, more particularly, designed to connect the bolt 81 of these locking means 8 and the control means 10.

As can be seen in the appended figures, these connecting means 11 comprise, on the one hand, an oblong opening 110 associated with said locking means 8 (more particularly on said bolt 81) and, on the other hand, a member 111, that comprise the control means 10, and which slides inside the oblong opening 110.

In this regard, it will be observed that it is, more particularly, the slider 91 (which includes the bolt 81 or which is secured to the bolt 81) or the bolt 81 itself which then comprises said oblong opening 110.

Finally, the locking and unlocking system 7 comprises return means 12 of the locking means 8 (more particularly the bolt 81 of these locking means 8) in the active locking position.

Such return means 12 may take the form of a spring, on the one hand, positioned around the slide 91 of the displacement mounting means 9 and, on the other hand, interposed between the slide 90 of these mounting means. 9 and, as the case, the bolt 81 or the active end of the bolt 81.

In addition, the control means 10 and / or the connecting means 11 and / or the return means 12 and / or the at least part of the locking means 8 (more particularly at least a portion of the bolt 81) are positioned inside this flap flap 2, more particularly inside a housing 23 of a tubular section 22 that includes frame 21 of this flap shutter 2.

Finally, the invention relates to an installation for closing an opening O that comprises the masonry M of a construction.

Such an installation then comprises at least one closure device 1 as described above.

In the following description, it will be described the operation of the closure device 1 described above.

Thus, when opening a flap 2 from its closed position and locking (more particularly under the effect of an opening command which has the effect of actuating the motorized drive means 5), the actuation of the motorized drive means 5 is translated, in a first step and because of the cooperation between the meshing means 51 and the complementary meshing means 52 of these motorized drive means 5, by a torque exerted on the motor 50.

Under the effect of this torque, this motor 50 moves (more particularly in rotation) until it comes into abutment against the means for limiting the stroke 6 (more particularly against a first stop 60) and, under the effect of this displacement, exerts traction on the control means 10 which, themselves, exert traction on the locking means 8, more particularly on the bolt 81.

Under the effect of this traction, these locking means 8 (more particularly the bolt 81) pass from an active locking position to an inactive locking position having the effect of unlocking the swing flap 2.

Thus, the control means 10 control the passage of the locking means 8 from an active locking position to an inactive locking position, this under the impetus of a displacement of the motor 50 relative to the flap 2, a such displacement resulting from an actuation of the motorized drive means 5 (more particularly of the motor 50) under the effect of an opening command.

In a second step, the actuation of the motorized drive means 5 produces the opening of the swing shutter 2.

When closing the swing flap 2, the actuation of the motorized drive means 5 is translated, in a first step and because of the cooperation between the meshing means 51 and the complementary meshing means 52 of these means motorized drive 5, by a torque exerted on the motor 50, such a torque being opposite to that exerted on the motor 50 during opening.

Under the effect of this torque, this motor 50 moves (more particularly in rotation) until it comes into abutment against the means for limiting the stroke 6 (more particularly against a second stop 60 ').

In a second step, the actuation of the motorized drive means 5 produces the closing of the swing shutter 2.

In the final closing phase and under the effect of the displacement of the swing flap 2, the bolt 81 of the locking means 8 cooperates with the striker 80 of these locking means 8 which pushes the bolt 81 in an unlocked position. This repulsion is authorized by the presence of the connecting means 11 mentioned below and by a sliding of the oblong opening 110 with respect to the member 111.

Finally, the bolt 81 is pushed into a locking position under the effect of the return means 12.

Claims (15)

1. Motor-driven closing device (1) for an opening (O), which the masonry (M) of a construction includes, this closing device (1) including, on the one hand, a hinged shutter (2), on the other hand, motorized driving means (5) for the hinged shutter (2), these motorized driving means (5) including a motor (50), and yet on the other hand, an automatic locking and unlocking system (7) for the hinged shutter (2), this system (7) including, on the one hand, locking means (8) capable of adopting an active position for locking the hinged shutter (2) and an inactive position for locking this hinged shutter (2), and on the other hand, control means (10) connected to the motorized driving means (5) for the hinged shutter (2) and designed to control the passing of the locking means (8) from an active locking position into an inactive locking position, wherein the motor-driven closing device (1) includes motor mounting means (50) for mounting this motor (50) in displacement relative to the hinged shutter (2), according to a limited stroke, and is configured so that the actuation of the motorized driving means (5) results, on the one hand and in a first step, into a displacement of the motor (50) until it abuts against means for limiting the stroke (6), while under the action of the displacement of the motor (50) the control means (10) control the passing of the locking means (8) into the inactive locking position, and on the other hand and in a second step, into the opening of the hinged shutter (2).
2. Motor-driven closing device (1) according to claim 1, wherein the hinged shutter (2) includes the motor (50) as well as said means for mounting this motor (50).
3. Motor-driven closing device (1) according to any one of claims 1 or 2, wherein the motor mounting means (50) consist of means for mounting this motor (50) in displacement inside the hinged shutter (2).
4. Motor-driven closing device (1) according to any one of the preceding claims, wherein the hinged shutter (2) includes a tubular profile (22) having inside a recess (23) in which the motor (50) is mounted, in displacement relative to this tubular profile (22) inside this recess (23) and through the means for mounting this motor (50).
5. Motor-driven closing device (1) according to any one of the preceding claims, wherein, on the one hand, the motor (50) includes a stator and a rotor movable relative to the stator, in rotation about an axis, and on the other hand, the motor mounting means (50) consist of means for mounting the stator of this motor (50) in rotation about the axis of rotation of the rotor of this motor (50), according to a limited stroke.
6. Motor-driven closing device (1) according to any one of the preceding claims, wherein the locking means (8) include, on the one hand, a striker (80) intended to be made integral with a masonry (M), on the other hand, a bolt (81) intended to be made integral with the hinged shutter (2) and movable between the inactive locking position and the active locking position in which this bolt (81) cooperates with the striker (80).
7. Motor-driven closing device (1) according to claim 6, wherein it includes means (9) for mounting the bolt (81) for mounting the bolt (81) in displacement, namely in translation, at least relative to the hinged shutter (2).
8. Motor-driven closing device (1) according to claim 7, wherein the means for mounting (9) the bolt (81) include, on the one hand, a sliding groove (90) intended to be made integral with the hinged shutter (2), and on the other hand, a slide (91), which the bolt (81) includes or which is made integral with this bolt (81), and which is mounted slidably relative to the sliding groove (90).
9. Motor-driven closing device (1) according to any one of the preceding claims, wherein it includes connecting means (11) intended to connect the locking means (8) and the control means (10), these connecting means (11) including, on the one hand, an oblong opening (110) associated with said locking means (8), and on the other hand, an organ (111), which the control means (10) include and which slides inside the oblong aperture (110).
10. Motor-driven closing device (1) according to any one of the preceding claims, wherein it includes means for restoring (12) the locking means (8) into the active locking position.
11. Motor-driven closing device (1) according to any one of the preceding claims, wherein the control means (10) consist of a rail, a bar, a rod or the like.
12. Motor-driven closing device (1) according to any one of the preceding claims, wherein the closing device (1) includes means (3) for mounting the hinged shutter (2) for mounting this hinged shutter (2) on the masonry (M), in rotation about an axis (4).
13. Motor-driven closing device (1) according to claim 12, wherein the motor mounting means (50) consist of means for mounting the motor (50) in rotation about an axis parallel to the axis of rotation (4) of the hinged shutter (2).
14. Motor-driven closing device (1) according to any one of the preceding claims, wherein the motorized driving means (5) include, on the one hand, the motor (50), which the hinged shutter (2) includes, on the other hand, meshing means (51), which the hinged shutter (2) includes, which are movable in rotation about an axis (510) and which are driven by said motor (50) in rotation about this axis (510), and yet on the other hand, complementary meshing means (52) intended to be made firmly integral with the masonry (M) and designed to cooperate with the meshing means (51).
15. Closing device (1) according to claim 14, wherein the motor mounting means (50) consist of means for mounting this motor (50) in rotation about an axis at least parallel to the axis of rotation (510) of the meshing means (51).

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