EP3445549A1

EP3445549A1 - Device for rupturing attachment zones on folding boxes and production unit comprising such a rupture device

Info

Publication number: EP3445549A1
Application number: EP17716795.4A
Authority: EP
Inventors: Mauro Chiari
Original assignee: Bobst Lyon SAS
Current assignee: Bobst Lyon SAS
Priority date: 2016-04-18
Filing date: 2017-04-05
Publication date: 2019-02-27
Anticipated expiration: 2037-04-05
Also published as: KR20180132867A; FR3050134A1; WO2017182137A1; US11426964B2; US20190111648A1; CN109070378B; FR3050134B1; JP2019517925A; EP3445549B1; CN109070378A; TW201803710A; TWI647079B; JP6683837B2; ES2805075T3; KR102173850B1

Abstract

The invention relates to a rupture device (1) comprising: an upper pressure member (2); a support part (4) for supporting the stack, said support part including multiple conveyor members (10) for conveying the stack in a conveying direction (X); and a lower pressure member (6) arranged below the conveyor members (10). The conveyor members (10) are adjacent to one another in a transverse direction (Y). Two adjacent conveyor members (10) can be moved apart from one another. The lower pressure member (6) comprises: i) two lower adjacent plates (6.1, 6.2) which can be moved apart from one another, and ii) a lower linear-movement actuator (6.3) for moving the lower plates (6.1, 6.2) so as to align the rupture slit (2.0) with a rupture line.

Description

DEVICE FOR BREAKING ATTACHMENT ZONES ON FOLDABLE BOXES AND MANUFACTURING PLANT COMPRISING SUCH

BREAKING DEVICE

The present invention relates to a breaking device for breaking fastening zones defining ruptible lines on stacked cardboard sheets.

The present invention applies to the field of manufacturing foldable boxes from cardboard sheets. A foldable box may for example be a carton of packaging. In general, such sheets of cardboard are pre-cut when stacked. The pre-cut produces on each sheet of cardboard a ruptible line defined by zones of attachment.

FR25271 89A1 discloses a breaking device for breaking attachment zones defining rupturable lines on stacked cardboard sheets forming a stack. The rupture device of FR2527189A1 comprises:

an upper pressing member movable between an immobilization position, where it immobilizes the stack, and a release position, where it is distant from the stack; and

a lower portion configured to support and transport the stack when the upper pressing member is in the immobilization position.

The lower part comprises a conveyor including a multitude of rollers configured to move the stack in the direction of transport.

However, as each roll must be relatively narrow, the pressure of the stack on the rollers may cause marks to be depressed at least on the underside of the stack. Because of these marks, at least the bottom sheet of each stack has a defect in quality requiring its disposal, which increases the rate of waste and the cost of production.

The present invention is intended in particular to solve, in whole or in part, the problems mentioned above.

For this purpose, the present invention relates to a breaking device, for breaking attachment zones defining ruptible lines on stacked cardboard sheets forming a stack, the breaking device comprising at least:

FIRE I LLE OF REM PLACEM ENT (RULE 26) an upper pressing member which is movable at least between:

An immobilizing position, in which the upper pressing member exerts pressure against the upper sheet of the stack, so as to immobilize the stack, and

A release position, in which the upper pressing member is arranged to be remote from the upper sheet of the stack; and

a support portion configured to support the stack when the upper pressing member is in the off position, the support portion including a plurality of transport members configured to transport and move the stack in a transport direction,

the rupture device being characterized:

in that the transport members are juxtaposed in a transverse direction which extends transversely to the direction of transport, the transport members being configured so that two juxtaposed transport members are movable relative to one another according to the transverse direction, a plurality of transport members each including: i) an elongated belt parallel to the transport direction and configured to drive the stack in the transport direction, ii) at least one rotational gear configured to drive the belt on a transport circuit. belt, and

in that it further comprises a lower pressing member arranged under the transport members, the transport members being movable at least between:

An immobilization position, in which the lower pressing member exerts a pressure against the lower faces of the transport members, so that the transport members immobilize the battery, and

• a release position, wherein the lower pressing member is arranged to be remote from the lower faces of the transport members;

the lower pressing member comprising:

i) two adjacent lower trays that are spaced from each other in the transverse direction so as to define a rupture slot, and

ii) a lower translation actuator arranged to move the lower plates in translation in the transverse direction, so as to make the breaking slot coincide with a ruptible line.

FIRE I LLE OF REM PLACEM ENT (RULE 26) Thus, such a rupture device makes it possible to break ruptable lines at different positions in the transverse direction without marking the bottom sheet of the stack. Indeed, the belts of the transport members are relatively wide, which distributes the pressure of the lower pressing member on a relatively large surface, and therefore minimizes the risk of marking the bottom sheet of the stack.

According to one variant, a plurality of transport members each have an elongate shape having a width to length ratio of less than 10% or even 5%. This elongated shape is for example rectilinear and rectangular.

According to one variant, the transverse direction is orthogonal to the direction of transport. Thus, such lower pressing members can break attachment areas forming rectilinear ruptible lines. The transport direction may be horizontal when the breaking device is in the service configuration.

According to one variant, the lower translation actuator comprises a rack mechanism and rack rails.

According to one variant, the lower jack is a linear actuator, for example a jack. The linear actuator can be driven by electrical, pneumatic or hydraulic energy.

The belt conveyors are effective in transporting batteries into the breaking device and breaking up the attachment zones along the rupturable lines.

According to one variant, each transport member includes such a belt and at least one such rotary pinion.

According to a variant, transport members each comprise two rotary gears located respectively at both ends of the transport member in the direction of transport.

Alternatively to this embodiment, several transport members may comprise, instead of belts, series of rollers or series of rollers configured to drive the stack in the direction of transport.

According to one embodiment, the number of transport members is greater than eight, preferably greater than sixteen.

According to one embodiment, each transport member is movable in the transverse direction relative to a juxtaposed transport member.

SUBSTITUTE SHEET (RULE 26) Thus, such a rupture device makes it possible to break a large number of ruptible lines at different positions in the transverse direction, which simplifies the transport of the stack upstream of the rupture device and which avoids having to return to the level of a single breaking zone a stack having several ruptible lines.

According to one embodiment, several transport members each have a width of between 50 mm and 500 mm, preferably between 50 mm and 200 mm, measured in the transverse direction.

Thus, such widths can juxtapose many transport members, so as to define many breaking areas, so to break many ruptable lines.

In other words, each of these transport members is narrow relative to the transport members of the state of the art.

According to one embodiment, the upper pressing member is movable, between its immobilization position and its release position, in a substantially vertical direction when the breaking device is in the service configuration,

and the transport members are movable, between the immobilization positions and the release positions, in a substantially vertical direction when the breaking device is in the service configuration.

For the upper pressing member, the disengaging position is above the immobilization position, while for the lower pressing member the disengaging position is below the immobilizing position.

According to one embodiment, the upper pressing member comprises a pivoting part, the breaking device further comprising a pivoting actuator configured to drive the pivoting part about a pivoting direction parallel to the transverse direction, so as to break attachment zones defining ruptible columns on the cardboard sheets of the stack, the ruptible columns extending transversely to the ruptible lines.

Thus, such a rupture device makes it possible to break attachment zones in two perpendicular directions, along the ruptible lines and the ruptible columns.

FIRE I LLE OF REM PLACEM ENT (RULE 26) According to one embodiment, the upper pressing member comprises at least two upper plates that are adjacent and spaced apart from each other in the transverse direction so as to define a rupture slot, the rupture device also comprising a top actuator translation device arranged to move in translation the upper pressing member in the transverse direction, so as to coincide the rupture slot with a ruptible line.

Thus, such adjacent trays can effectively exert pressure against the topsheet of the stack.

According to one embodiment, the upper pressing member comprises an upper jack configured to separate and bring the two upper plates to one another in the transverse direction,

and wherein the lower pressing member comprises a lower jack configured to move the two lower platens closer to and closer to each other in the transverse direction.

According to one embodiment, several transport members furthermore each include: coupling elements which are arranged on each of the transverse faces of the rotary gear and which are configured to cooperate with coupling elements of the juxtaposed transport member , the rupture device further comprising a rotary actuator configured to rotate the rotary gears.

According to one variant, the coupling elements comprise jaw or friction discs.

According to one embodiment, the rupture device further comprises a clutch system configured to bring the transport members in translation in the transverse direction.

According to one embodiment, the clutch system further comprises at least:

i) a guide rail extending in the transverse direction, ii) carriages arranged to move on the at least one guide rail, each carriage being configured to support a respective transport member, and

iii) at least one electromechanical clutch configured to move a transport member so as to move the carriages on the at least one rail.

SUBSTITUTE SHEET (RULE 26) According to one embodiment, the at least one electromechanical clutch comprises a pivoting bar arranged to pivot so as to induce a horizontal displacement of the transport member in the transverse direction.

Furthermore, the subject of the present invention is a manufacturing facility for manufacturing foldable boxes, the manufacturing facility being characterized in that it comprises: i) a breaking device according to the invention, and ii) a unit control configured for:

receiving a signal indicating the position of at least one incoming breakable line in the transverse direction, and

controlling the displacement of the upper pressing member from the release position to the immobilization position, so as to immobilize the battery, to control the displacement of the transport members from the release positions to the immobilization positions, so as to immobilize the stack, and spread the upper trays and the lower trays in the transverse direction, so as to break the attachment zones defining said at least one ruptible line.

The embodiments and variants mentioned above may be taken individually or in any combination technically possible.

The present invention will be well understood and its advantages will also emerge in the light of the description which follows, given solely by way of nonlimiting example and with reference to the appended figures, in which identical reference signs correspond to elements structurally and / or functionally identical or similar. In the attached figures:

Figure 1 is a schematic perspective assembled view of a rupture device according to the invention; Figure 2 is a schematic perspective view, at an angle different from Figure 1, and with partial transparency of the breaking device of Figure 1;

Figure 3 is an enlarged view of Detail II I in Figure 2;

SUBSTITUTE SHEET (RULE 26) Figure 4 is a perspective view of a transport member belonging to the breaking device of Figure 1; Figure 5 is a perspective view, at an angle different from Figure 4, the transport member of Figure 4;

Figure 6 is an enlarged view of Detail VI in Figure 5;

Figure 7 is a detail view VI I in Figure 5, on a larger scale and at another perspective angle;

Figure 8 is a view of a lower pressing member belonging to the rupture device of Figure 1;

Figure 9 is an enlarged view of Detail IX in Figure 8;

Fig. 10 is a view of a portion of the breaker of Fig. 1 in a first configuration;

Figure 1 1 is a view similar to Figure 9 of the rupture device of Figure 9 in a second configuration; and Fig. 12 is a schematic perspective view of a stack of stacked cardboard sheets.

FIGS. 1 to 1 1 illustrate a rupture device 1, for breaking attachment zones defining ruptible lines 101 on stacked cardboard sheets forming a stack 100, visible in FIG. 1 2. In general, a sheet of cardboard has globally the shape of a rectangle and a stack 100 of stacked cardboard sheets has generally the shape of a rectangular parallelepiped, as shown in Figure 12.

The rupture device 1 comprises an upper pressing member 2, a lower pressing member 6 and a supporting portion 4. The breaking device 1 further comprises a frame 5 configured to support the upper pressing member 2, the lower pressing member 6 and the support part 4 and other components of the rupture device 1.

When the breaking device 1 is in the service configuration, the upper pressing member 2 is higher than the lower pressing member 6 and the supporting portion 4 is located between the upper pressing member 2 and the lower pressing member 6 When the breaking device 1 is in the configuration of

SUBSTITUTE SHEET (RULE 26) service (FIG. 1), the upper pressing member 2 is higher in the immobilization position than in the disengaged position.

The upper pressing member 2 is movable between:

An immobilization position, in which the upper pressing member 2 presses against the upper sheet of the stack, so as to immobilize the stack, and

A release position, in which the upper pressing member 2 is arranged to be remote from the upper sheet of the stack.

In the example of the figures, the upper pressing member 2 is movable, between its immobilization position and its release position, in a substantially vertical direction Z when the breaking device 1 is in the service configuration (FIGS. 1 and 2). ).

The support portion 4 is configured to support the stack when the upper pressing member 2 is in the immobilization position. The support portion 4 comprises a plurality of transport members 10. In the example of the figures, the number of transport members 10 is equal to 36.

The transport members 10 are configured to transport and move the stack 100 in a transport direction X. For this purpose, each transport member 10 includes:

i) a belt 1 2 which is elongated parallel to the transport direction X and which is configured to drive the stack according to the transport direction X, and ii) rotary gears 14 and 15 configured to drive the belt 12 on a transport circuit. belt ; the rotary gears are respectively located at both ends of the transport member 10 in the direction of transport X.

The transport members 10 are juxtaposed in a transverse direction Y which extends transversely to the transport direction X. The transverse direction Y is here orthogonal to the transport direction X. The transport direction X is horizontal when the rupture device 1 is in the service configuration (FIGS. 1 and 2). The transport direction X is usually referred to as the "thrust direction", and the transverse direction Y is usually referred to as the "width direction".

The transport members 10 are configured so that two juxtaposed transport members 10 are displaceable with respect to each other in the transverse direction Y. In the example of the figures, each member

SUBSTITUTE SHEET (RULE 26) transport is movable in the transverse direction Y relative to a transport member 10 juxtaposed.

Each transport member 10 here has a width W10 approximately equal to 50 mm, measured in the transverse direction Y. In addition, each transport member 10 here has an elongated shape having a ratio of the width W10 to the length L10 approximately equal to 3.5%. The length L1 0 is approximately equal to 1450 mm. The elongated shape of each transport member 1 0 is here rectilinear and rectangular.

As shown in Figure 3, the upper pressing member 2 comprises two upper plates 2.1, 2.2 adjacent and spaced from each other in the transverse direction Y so as to define a rupture slot 2.0. The upper pressing member 2 comprises an upper jack 26 configured to separate and selectively move the two upper plates 2.1 and 2.2 from each other in the transverse direction Y.

Figure 1 symbolically illustrates a manufacturing facility 51 for making foldable boxes. The manufacturing facility 51 comprises: i) the rupture device 1 and ii) a control unit 52 configured to control several components of the rupture device 1.

When the rupture device 1 must break ruptible lines 101, the upper cylinder 26 moves the upper plate 2.1 from the upper plate 2.2. Then, the upper cylinder 26 brings the upper plate 2.1 of the upper plate 2.2, to return to the adjacent position. The movements of the upper cylinder 26 are controlled by the control unit 52.

The rupture device 1 further comprises an upper translation actuator 24 which is arranged to move the upper pressing member 2, that is to say the upper plates 2.1 and 2.2, in translation in the transverse direction Y. When the rupture device 1 is in use, the upper translation actuator 24 moves the upper pressing member 2 so as to make the rupture slot 2.0 coincide with a rupturable line January 01. The movements of the upper translational actuator 24 are controlled by the control unit 52.

The lower pressing member 6 is arranged under the transport members 10. The transport members 10 are movable between:

FIRE I LLE OF REM PLACEM ENT (RULE 26) An immobilization position, in which the lower pressing member 6 exerts a pressure against the lower faces of the transport members 10, so that the transport members 10 immobilize the stack 100, and

A release position, in which the lower pressing member 6 is arranged to be remote from the lower faces of the transport members 10.

The transport members 1 0 are movable, between the immobilization positions and the release positions, in the substantially vertical direction Z when the breaking device 1 is in the service configuration (FIGS. 1 and 2).

In the disengaged position, the belts 12 of the transport members 10 can rotate, thus moving the stacks 100 in the transport direction X. In the immobilized position, the belts 12 can not rotate because they are in contact with the lower pressing member 6.

The rupture device comprises a vertical drive system 27 which is configured to raise and lower the transport members 10 in the vertical direction Z. The vertical drive system 27 comprises: i) vertical rods 27.1, ii) disks 27.2 and iii) timing rods 27.3.

The vertical rods 27.1 are integral with a frame 27.4 which supports the transport members 10. The vertical rods 27.1 are here four in number, two of which are visible in Figure 3.

Each disk 27.2 fulfills the function of a cam, since it transforms a rotational movement into a translation movement. Each vertical link 27.1 is connected to a respective disk 27.2 eccentrically. Each synchronization rod 27.3 is connected to a respective disk 27.2 eccentrically.

The vertical drive system 27 further comprises transverse actuators, not shown, which are configured to move the synchronization rods 27.3 in translation parallel to the transverse direction Y.

In operation, the transverse actuators move the timing rods 27.3; the synchronization rods 27.3 rotate the discs 27.2; the discs 27.2 drive the vertical rods 27.1, either upwards or downwards.

SUBSTITUTE SHEET (RULE 26) When the vertical rods 27.1 are in the disengaged position (at the top), the transport members 10 are disengaged from the lower pressing member 6, so that the belts 12 can carry the stacks 10 in the transport direction X.

The lower pressing member 6 comprises two lower plates 6.1 and 6.2. The lower plates 6.1 and 6.2 are adjacent and spaced from each other in the transverse direction Y so as to define a rupture slot 2.0.

The lower pressing member 6 further comprises a lower translational actuator 6.3 which is arranged to move the lower plates 6.1 and 6.2 in translation in the transverse direction Y. In the example of FIGS. 8 and 9, the lower translational actuator 6.3 is composed of a rack mechanism comprising rack rails 6.30.

When the breaking device 1 is in use, the lower translation actuator 6.3 moves the lower pressing member 6 so as to make the rupture slot 2.0 coincide with a ruptible line 101. The movements of the lower translation actuator 6.3 are controlled by the control unit 52.

In addition, the lower pressing member 6 comprises a lower jack 6.6, symbolized in FIGS. 8 and 9, configured to selectively move the two lower plates 6.1 and 6.2 away from each other in the transverse direction Y.

When the rupture device 1 must break ruptible lines 101, the lower cylinder 6.6 discards the lower plate 6.1 of the lower plate 6.2. Then, the lower cylinder 6.6 brings the lower plate 6.1 closer to the lower plate 6.2, to return to the adjacent position. The movements of the lower jack 6.6 are controlled by the control unit 52.

Furthermore, each transport member 10 further includes coupling elements 1 6 and 17. The coupling elements 1 6 and 17 are arranged on each of the transverse faces of the rotary gears 14 and 15. The coupling elements 1 6 and 17 are configured to cooperate with coupling elements of the transport member 10 juxtaposed. The rupture device 1 further comprises a rotary actuator (not shown) configured to rotate the rotary gears 14 and 15.

SUBSTITUTE SHEET (RULE 26) The rupture device 1 further comprises a clutch system 30 which is configured to move in translation in the transverse direction Y, the juxtaposed transport members 10. The clutch system 30 "repackages" or re-engages the respective rotary gears 14 and 15 with the respective coupling members 1 6 and 17.

The clutch system 30 thus enables the transport members 10 to be returned to the initial position, after the lower plates 6.1 and 6.2 have spread the transport members 10 to break a rupturable line in the stack 100 of stacked cardboard sheets. When the transport members 10 are in the initial position, all their rotary gears 14 and 15 are engaged with coupling elements 1 6 and 17, which makes it possible to drive all the belts 12 in rotation simultaneously.

The clutch system 30 comprises:

i) two guide rails 32 extending parallel to the transverse direction Y,

ii) carriages 34 arranged to slide respectively on the guide rails 32, each carriage 34 being configured to support a respective transport member 10

iii) two electromechanical clutches 38 configured to move the carriages 34 on the rails 32.

In the example of Figures 10 and 1 1, each electromechanical clutch 38 comprises a pivoting bar 38.1 whose ends are equipped with rollers. The clutch system 30 further comprises a vertical linear actuator 31 which is arranged to move, in translation parallel to the vertical direction Z, an end of the pivot bar 38.1.

A first end of the pivot bar 38.1 is in contact with the vertical linear actuator 31. The other end of the pivot bar 38.1 is in contact with the first transport member 10 (left in Figures 1 0 and 1 1).

The pivot bar 38.1 is here arranged to pivot at an angle A38.1 of about 30 degrees, which induces a horizontal displacement of about 15 mm of the first transport member 10 to the right in the transverse direction Y.

SUBSTITUTE SHEET (RULE 26) When the breaking device 1 and the manufacturing installation 51 are in use, the control unit 52 operates in particular the following steps:

receiving a signal indicating the position of at least one incoming breakable line in the transverse direction Y,

controlling the displacement of the upper pressing member 2 from the release position to the immobilizing position, so as to immobilize the battery, to control the displacement of the transport members 10 from the release positions to the immobilization positions, so as to immobilizing the stack, and spreading the upper plates 2.1, 2.2 and the lower plates 6.1 and 6.2 in the transverse direction Y, so as to break the attachment zones defining said at least one ruptible line 101.

Then, the control unit 52 operates in particular the following step: control the linear vertical actuator 31, so as to move the transport members 10 in translation in the transverse direction Y. For the two transport members 10 previously spaced, the Rotary gears 14 and 15 engage respectively with the coupling elements 16 and 17. Thus, the rupture device 1 is again ready to break a breakable line 101.

Of course, the present invention is not limited to the particular embodiments described in the present patent application, nor to embodiments within the scope of those skilled in the art. Other embodiments may be envisaged without departing from the scope of the invention, from any element equivalent to an element indicated in the present patent application.

SUBSTITUTE SHEET (RULE 26)

Claims

1. Breaking device (1) for breaking attachment zones defining ruptible lines on stacked cardboard sheets forming a stack, the breaking device (1) comprising at least:

an upper pressing member (2) which is movable at least between:

An immobilizing position, in which the upper pressing member (2) presses against the upper sheet of the stack, so as to immobilize the stack, and

A release position, in which the upper pressing member (2) is arranged to be remote from the upper sheet of the stack; and

a support portion (4) configured to support the stack when the upper pressing member (2) is in the immobilization position, the support portion (4) comprising a plurality of transport members (1 0) configured to carry and moving the stack in a transport direction (X),

the rupture device (1) being characterized:

in that the transport members (1 0) are juxtaposed in a transverse direction (Y) extending transversely to the conveying direction (X), the transport members (1 0) being configured so that two transport (1 0) juxtaposed are movable relative to each other in the transverse direction (Y), several transport members (1 0) each including: i) a belt (12) elongated parallel to the direction of transport (X) and configured to drive the stack in the transport direction (X), ii) at least one rotational gear (14) configured to drive the belt (12) on a belt circuit, and

in that it further comprises a lower pressing member (6) arranged under the transport members (10), the transport members (10) being movable at least between:

An immobilizing position, in which the lower pressing member (6) exerts a pressure against the lower faces of the transport members (10), so that the transport members (10) immobilize the stack, and

• a release position, wherein the lower pressing member (6) is arranged to be remote from the lower faces of the transport members (10); the lower pressing member (6) comprising:

i) two lower trays (6.1, 6.2) adjacent and spaced from each other in the transverse direction (Y) to define a break slot (2.0), and ii) a lower translational actuator (6.3) arranged to move the lower plates (6.1, 6.2) in translation in the transverse direction (Y), so as to make the breaking slot (2.0) coincide with a ruptible line.

2. Device of rupture (1) according to the preceding claim, wherein the number of transport members (10) is greater than eight, preferably greater than sixteen.

3. rupture device (1) according to any one of the preceding claims, wherein wherein each transport member is movable in the transverse direction (Y) relative to a transport member juxtaposed.

4. rupture device (1) according to any one of the preceding claims, wherein a plurality of transport members (10) each have a width (W10) of between 50 mm and 500 mm, preferably between 50 mm and 200 mm, measured in the transverse direction (Y).

5. A rupture device (1) according to any one of the preceding claims, wherein the upper pressing member (2) is movable, between its immobilization position and its release position, in a substantially vertical direction (Z). when the breaking device (1) is in the service configuration,

and wherein the transport members (10) are movable, between the immobilization positions and the release positions, in a substantially vertical direction (Z) when the breaking device (1) is in the service configuration.

The rupture device according to any one of the preceding claims, wherein the upper pressing member comprises a pivoting part, the breaking device further comprising a pivoting actuator configured to drive the pivoting part about a pivoting direction. parallel to the transverse direction so as to breaking attachment zones defining ruptible columns on the cardboard sheets of the stack, the ruptible columns extending transversely to the ruptible lines.

7. rupture device (1) according to any one of the preceding claims, wherein the upper pressing member (2) comprises at least two upper plates (2.1, 2.2) adjacent and spaced apart from each other according to the transverse direction (Y) so as to define a rupture slot (2.0),

the rupture device (1) further comprising an upper translational actuator (24) arranged to move in translation the upper pressing member (2) in the transverse direction (Y) so as to make the rupture slot coincide (2.0 ) with a ruptible line (101).

8. Device for rupture (1) according to the preceding claim, wherein the upper pressing member (2) comprises an upper cylinder (26) configured to separate and bring the two upper plates (2.1, 2.2) one of the other in the transverse direction (Y),

and wherein the lower pressing member (6) comprises a lower jack (6.6) configured to separate and bring the two lower platens (6.1, 6.2) from each other in the transverse direction (Y).

A rupture device (1) according to any one of the preceding claims, wherein a plurality of transport members (10) further include each: coupling elements (16, 17) which are arranged on each of the transverse faces of the rotary gear (14) and which are configured to cooperate with coupling elements of the juxtaposed transport member, the breaking device (1) further comprising a rotary actuator configured to rotate the rotary gears (14). .

10. rupture device (1) according to any one of the preceding claims, further comprising a clutch system (30) configured to bring the transport members (10) in translation in the transverse direction (Y).

1 1. Breaking device (1) according to the preceding claim, wherein the clutch system (30) further comprises:

at least one guide rail (32) extending parallel to the transverse direction (Y),

carriages (34) arranged to slide on the at least one guide rail (32), each carriage (34) being configured to support a respective transport member (1 0), and

at least one electromechanical clutch (38) configured to move a transport member (1 0) so as to move the carriages (34) on the at least one rail (32).

2. A rupture device (1) according to claim 1 1, wherein the at least one electromechanical clutch (1 8) comprises a pivoting bar (38.1) arranged to pivot so as to induce a horizontal displacement of the transport (1 0) in the transverse direction (Y).

A manufacturing facility (51) for making foldable boxes, the manufacturing facility (51) being characterized in that it comprises: i) a breaking device (1) according to any one of the preceding claims , and ii) a control unit (52) configured to:

receiving a signal indicating the position of at least one incoming breakable line in the transverse direction (Y),

controlling the displacement of the upper pressing member (2) from the release position to the immobilizing position, so as to immobilize the stack,

controlling the displacement of the transport members (10) from the release positions to the immobilization positions, so as to immobilize the stack, and move the upper plates (2.1, 2.2) and the lower plates (6.1, 6.2) in the transverse direction (Y), so as to break the attachment zones defining said at least one ruptible line (1 01).