Paving stone recycling machine and associated process.

Abstract

Recycling machine (100) of a paving stone (b1) comprising four faces (f1, f2, f3, f4), the recycling machine (100) comprising: A first machining station (su1), A second machining station (su2), A mechanized conveyor being capable of carrying out the following steps: A movement of the paving stone (b1) along a straight path passing through: The first machining station (su1), to remove the bonding material on two first faces (f2, f4) parallel to each other, among the four faces, and The second machining station (su2), to remove the bonding material on two second faces (f1, f3), parallel to each other, among the four faces, And, an inter-station rotation of the paving stone (b1) of 90 degrees around an axis of rotation (rot1), between the first machining station (su1) and the second machining station (su2). Figure for the summary: Figure 10

Description

Title of the invention: Paving stone recycling machine and associated process.

[0001] The invention relates to the recycling of paving stones, for example, construction bricks. There is a need to facilitate the recycling of such paving stones.

[0002] To this end, the invention relates to a machine for recycling a paving stone comprising a bonding material on four of its six faces and no bonding material (in other words: and no bonding material) on two other faces (distinct from the four faces) among its six faces, the paving stone being a rectangular prism (in other words: a rectangular parallelepiped), the four faces being orthogonal to the other two faces, the recycling machine comprising: - An entry station, - An exit station, - A first machining station, - A second machining station, - A mechanized conveyor (for example powered by an energy source, such as a hydraulic flow or an electric current) comprising a paving stone transport element in contact with one (at least) of the other two faces, the mechanized conveyor being capable of implementing the following steps: • At the entry station (in other words: in the entry station), the paving stone is loaded by the transport unit, then: - A displacement (of a center of inertia) of the transport element, the transport element holding the block during the displacement, from the input station to the output station along a straight trajectory having a direction, passing through (in other words: passing in): - The first machining station, the first machining station being intended to remove the bonding material from (in other words: from) the first two parallel faces, among the four faces, when the block (and the transport element) passes through (in other words: passes into) the first machining station, during the movement, (the transport element being intended to hold the block fixed (relative to the transport element) when the first machining station removes the bonding material of the first two faces, in other words, when the block passes through the first machining station), and - The second machining station, the second machining station being intended to remove the bonding material on (in other words: from) two second faces, parallel to each other, among the four faces, when the block passes through (in other words: passes into) the second machining station during movement, (the transport element being intended to hold the block fixed (relative to the transport element) when the second machining station removes the bonding material from the two second faces, in other words, when the block passes through the second machining station), the two second faces being perpendicular to the first two faces, - And, a rotation (relative to the frame of the recycling machine, and / or the first machining station and / or the second machining station) of the paving stone (and at least part of the transport element (for example, the support below)) of 90 degrees around an inter-station rotation axis, between the first machining station and the second machining station, during movement, the inter-station rotation axis being parallel to the first two faces and the second two faces during rotation and / or during movement (and passing through, for example, the brick, for example, the center of inertia of the brick, for example, the center of the other two faces), • Then, at the exit station (in other words: in the exit station), the paving stone is unloaded by the transport unit, • Then, a return of the transport element (without the pad) from the exit station to the entry station.

[0003] Thus, the recycling machine according to the invention can remove the bonding material from the entire surface of the four faces, and be robust and simple, thanks to the straight trajectory of the transport element, and the inter-station rotation of the paving stone by 90 degrees.

[0004] Following recycling, the bricks can be reused for new constructions, for example buildings.

[0005] For example, the first machining station and / or the second machining station are covered with a safety cover.

[0006] For example, the inter-station rotation axis is perpendicular to the direction. Alternatively, the inter-station rotation axis s is parallel to the direction.

[0007] The paving stone is made of a rigid material, for example stone, terracotta, concrete, or another material. It is typically a building construction material.

[0008] The bonding material is for example a mortar or an adhesive.

[0009] According to one embodiment, the paving stone is a building construction brick (made of terracotta).

[0010] According to one embodiment, the paving transport element includes a support intended to support the paving stone (for example, comprising a plate) by (in other words: and to be in contact with) a fifth face among the other two faces, the mechanized conveyor moving the support, during the movement, from the entry station to the exit station along the straight trajectory.

[0011] Alternatively, the transport member includes a suction cup or a clamp to hold the paving stone.

[0012] According to one embodiment, the input station includes a table having a cavity and, during the loading step, the mechanized conveyor is able to position the support (for example, the plate) in the cavity so that the support touches the paving stone (by the fifth face) while the paving stone is placed on the table (straddling the groove).

[0013] Of course, other input station architectures can be considered. For example, a device can be designed to grasp the block in a container using a gripper.

[0014] For example, the table includes positioning marks for the pad. These positioning marks can help an operator to position the pad precisely prior to the loading step. They may be ink marks or marks projected by a laser onto the table, for example, or adjustable mechanical stops.

[0015] Alternatively, the transport member can determine a position of the paving stone, for example using measuring members, for example laser, or a camera, and then position the paving stone, relative to the machine, before it passes through the first machining station and the second machining station, during the movement.

[0016] According to one embodiment, the paving stone transport element comprises: - A head designed to be in contact with a sixth face, among the other two faces, opposite the fifth face, during movement, - A suitable actuator (for example, a cylinder, alternatively a motor, an electromagnetic actuator, etc.): • Position the head sufficiently far from the support to allow the block to be positioned between the support and the head, when the transport element is at (in other words: in) the input station (and when the support, for example the plate, is in the cavity), prior to the block loading step, then • To press (in other words: to move) the head, during the loading step of the block and during the movement, against the sixth face, so as to fix the block between the support (for example, the plate) and the head during the movement (in particular, when the block passes through (in other words: passes into) the first machining station and / or when the block passes through (in other words: passes into) the second machining station) and the rotation, then • To move the head of the paving stone away during the unloading stage, so as to free the paving stone from the transport device.

[0017] For example, the head is mounted freely in rotation relative to the machine (in other words: relative to the machine frame).

[0018] According to one embodiment, the mechanized conveyor includes a motor, for example a hydraulic motor, driving the movement via a mechanical transmission of the mechanized conveyor.

[0019] A hydraulic motor has the advantage of being particularly reliable in a construction site environment, but of course other means can be used to drive the movement such as an electric motor.

[0020] Alternatively, the mechanized conveyor includes a cylinder driving (directly) the movement.

[0021] The mechanical transmission includes, for example, a worm gear, a transmission chain and / or a rack.

[0022] According to one embodiment, the recycling machine comprises - A first motor, for example a first hydraulic motor, driving a first movement of the head via a first mechanical transmission of the mechanized conveyor, and - A second motor, for example a second hydraulic motor, different from the first hydraulic motor, driving a second movement of the support via a second mechanical transmission of the mechanized conveyor.

[0023] The first and / or second mechanical transmission includes, for example, a worm gear, a transmission chain and / or a rack.

[0024] The first movement and the second movement are, for example, synchronized by electronic, hydraulic, and / or mechanical means.

[0025] Alternatively, the head and the support are mechanically linked and driven by the same hydraulic motor.

[0026] According to one embodiment, the first machining station comprises two first saws and / or the second machining station comprises two second saws: - A first saw, among the first two saws, being capable of removing the bonding material from (in other words: the bonding material of) a first face, among the first two faces, when the block passes through the first machining station (during movement), and / or - A second saw, among the first two saws, being capable of removing the bonding material from (in other words: the bonding material of) a second face opposite (and / or parallel) to the first face, among the first two faces, when the block passes through the first machining station (during movement), and / or - A third saw, among the two second saws, being capable of removing the bonding material from (in other words: the bonding material from) a third face, among the two second faces, when the block passes through the second machining station (during movement), and / or - A fourth saw, among the two second saws, being able to remove the bonding material on (in other words: the bonding material of) a fourth face opposite (and / or parallel) to the third face, among the two second faces, when the block passes through the second machining station (during the move).

[0027] A saw is particularly effective for removing the bonding material, but of course another type of tool such as a sander or milling machine can be used.

[0028] According to one embodiment: - The first saw is a circular saw comprising a first axis of rotation perpendicular to the first face, when the paving stone (and / or the mechanized conveyor) passes through the first station (in other words: to the direction), the first saw being able to remove the bonding material on the first face when it rotates around the first axis of rotation (during movement), and when the paving stone (and / or the mechanized conveyor) passes through the first station, and / or - The second saw is a circular saw comprising a second axis of rotation perpendicular to the second face; when the paving stone (and / or the mechanized conveyor) passes through the first station (in other words: at the direction), the second saw is capable of removing the bonding material on the second face when it rotates around the second axis of rotation (during movement), and the paving stone (and / or the mechanized conveyor) passes through the first station, and / or - The third saw is a circular saw comprising a third axis of rotation perpendicular to the third face, when the paving stone (and / or the mechanized conveyor) passes through the second station, (in other words: in the direction), the third saw being able to remove the bonding material on the third face when it rotates around the third axis of rotation (during movement), and when the paving stone (and / or the mechanized conveyor) passes through the second station, and / or - The fourth saw is a circular saw comprising a fourth axis of rotation perpendicular to the fourth face when the paving stone (and / or the mechanized conveyor) passes through the second station, (in other words: to the direction), the fourth saw being able to remove the bonding material on the fourth face when it rotates around the fourth axis of rotation (during the movement) and the paving stone (and / or the mechanized conveyor) passes through the second station.

[0029] Alternatively, another type of saw such as a reciprocating saw, a band saw or a jigsaw may be used.

[0030] For example, the first saw, the second saw, the third saw, and / or the fourth saw, may have a diameter of forty centimeters.

[0031] For example, the first axis of rotation is identical to the second axis of rotation. Thus, the block passes between the first saw and the second saw when it passes through the first station during its movement. In this case, the distance between the first and second saws can be adjusted. This adjustment can be controlled electronically or by a handwheel.

[0032] For example, the third axis of rotation is identical to the fourth axis of rotation. Thus, the block passes between the third and fourth saws when it passes through the second station during its movement. In this case, the distance between the third and fourth saws can be adjusted. This adjustment can be controlled electrically or by a handwheel.

[0033] Alternatively, the first axis of rotation is offset with respect to the second axis of rotation and / or the third axis of rotation is offset with respect to the fourth axis of rotation.

[0034] According to one embodiment, the mechanized conveyor includes a grooved cam for generating inter-station rotation of the paving stone (and, for example, of a part of the transport element, for example, the support) by 90 degrees, around an axis of inter-station rotation, during movement (in other words: while the mechanized conveyor is carrying out the movement).

[0035] The use of a cam has the advantage of offering high reliability in a construction site environment, but alternatively, the 90-degree inter-station rotation of the paving stone can be implemented by another device such as a hydraulic motor, an electric motor, or an electromagnetic actuator.

[0036] For example, the cam comprises a groove and a roller adapted to slide in the groove. During movement, the roller is connected to a part of a transport element, for example, to the support, by an arm (orthogonal to the inter-station axis of rotation). The geometry of the arm, the support, and the roller is configured to generate an inter-station rotation of the block (and, for example, of a part of the transport element, for example, of the support, for example, of the plate) of 90 degrees during movement (between the first machining station and the second machining station). In particular, during movement, the roller moves in a direction orthogonal to the direction of movement and orthogonal to the inter-station axis of rotation, which generates an inter-station rotation of the block (and, for example, of a part of the transport element, for example, of the support) of 90 degrees.

[0037] According to one embodiment, the exit station includes a slide down which the paving stone slides after unloading.

[0038] Alternatively, the pad can fall directly into a container or the output station can have a completely different architecture.

[0039] For example, the slide may include a groove to allow the support (in other words: a foot of the support) to pass through during the unloading stage.

[0040] For example, the recycling machine includes a non-return door (i.e., a check valve) suitable for: - To let the paving stone pass during the movement, then - To prevent the paving stone from passing during the return of the transport unit, from the exit station to the entry station, so as to cause the paving stone to fall from the transport unit, for example into the slide.

[0041] Of course, other mechanisms can be used to make the brick of the transport member bulge, such as a hydraulic jack.

[0042] For example: - The non-return gate includes, for example, two rods to prevent the paving stone from passing through during the return of the transport unit, and / or - The door is positioned, by gravity, in a position closing the passage of the paving stone during the return of the transport device (alternatively, a spring positions the door in this position).

[0043] The invention also relates to a method for recycling a paving stone comprising a bonding material on four of its six faces and no bonding material on two other faces (distinct from the four faces) among its six faces, the paving stone being a rectangular prism (in other words: a rectangular parallelepiped), the four faces being orthogonal to the other two faces, the recycling machine comprising: - An entry station, - An exit station, - A first machining station, - A second machining station, - A mechanized conveyor (for example, powered by an energy source such as a hydraulic flow or an electric current) comprising a paving stone transport element in contact with one (at least) of the other two faces, the process comprising the following steps implemented by the mechanized conveyor: • At the entry station (in other words: in the entry station), the paving stone is loaded by the transport unit, then: - A displacement (of a center of inertia) of the transport element from the input station to the output station along a straight trajectory having a direction, the transport element holding the block during the displacement, passing through (in other words: passes into); - The first machining station, the process comprising a step in which the first machining station removes the bonding material from two parallel faces out of the four faces, when the block (and the transport member) passes through the first machining station during its movement, (the transport member holding the block fixed relative to the transport member when the first machining station removes the bonding material from the first two faces, when the block or the transport member passes through the first machining station), and - The second machining station, the process comprising a step in which (otherwise said: during which) the second machining station removes the bonding material on (in other words: from) two second faces, parallel to each other, among the four faces, when the block passes through (in other words: passes into) the second machining station during the movement, (the transport member holding the block (fixed relative to the transport member) when the second machining station removes the bonding material from the first two faces, in other words, when the block or the transport member passes through the second machining station), the two second faces being perpendicular to the first two faces, - And, an inter-station rotation (relative to the frame of the recycling machine) of the paving stone (and at least part of the transport component (for example, the support and / or the plate below)) of 90 degrees around an inter-station axis of rotation, between the first machining station and the second machining station, the inter-station axis of rotation being parallel to the first two faces and the second two faces during rotation and / or during movement (and passing through, for example, the brick, for example, the center of inertia of the brick, for example, the center of the other two faces), • Then, at the exit station (in other words: in the exit station), the paving stone is unloaded by the transport unit, • Then, a return of the transport element (without the pad) from the exit station to the entry station.

[0044] For example, these steps can be controlled by a microprocessor of the recycling machine.

[0045] The characteristics and advantages of the process are identical to those of the recycling machine according to the invention (without it being necessary to repeat them here).

[0046] When the recycling machine, mechanical conveyor, or transport component, or other element, is "configured to" (or "suitable for" or "is designed to" or "is intended to") perform or implement a step or operation, this implies, for example, that the element includes means for performing the step or operation. These means preferably include mechanical and / or electronic means.

[0047] Other features and advantages of the present invention will become more apparent upon reading the following detailed description, which includes embodiments of the invention given by way of non-limiting examples and illustrated by the accompanying drawings, in which: [Fig.1], [Fig.2], [Fig.3], [Fig.4], [Fig.5], [Fig.6], [Fig.7], [Fig.8], [Fig.9], [Fig.10], [Fig.11] represent a recycling machine or part of the recycling machine at various stages of the process of [Fig. 12], • [Fig. 12] represents an implementation of the process according to the invention, according to an example of an embodiment, by the recycling machine of [Fig.1] to 11.

[0048] Detailed description of an example embodiment of the invention, with reference to figures 1 to 12.

[0049] Fig. 1 represents the recycling machine 100 comprising an input station including a table on which an operator has placed a brick 100.

[0050] The brick bl includes mortar on faces fl, f2, f3 and f4, and no mortar on two other faces f5 and f6.

[0051] For example, the table tabl includes positioning marks for the block, printed with ink. These positioning marks can help an operator to position the block precisely prior to the loading step.

[0052] The brick bl is supported by the folded plate of the support supl, mounted on the carriage chl. The folded plate is in the cavity cavl and touches the face f5 of the brick bl through the table tabl.

[0053] At step S10, a piston (not referenced) is controlled (by a microprocessor of the machine not shown) so that the head tetl is lowered and comes into contact with the face f6, as shown [Fig.2], so as to fix the block bl between the folded plate and the head tetl during steps S20 to S80.

[0054] For example, the tetl head is mounted to rotate freely relative to the machine frame.

[0055] The recycling machine 100 comprises two hydraulic motors ml and m2.

[0056] During steps S20 to S80, the motor m2 drives a movement in the direction dirl, of the carriage chl, of the support supl and of its folded plate, by means of a worm screw (not shown), and in a synchronized manner, the motor ml drives the movement of the head tetl, also in the direction dirl.

[0057] For example, these steps can be controlled by a microprocessor of machine 100.

[0058] At step S20, the brick bl, as well as the support supl, the folded plate, pass through the machining station sul. During this step, represented [Fig.3]; - The saw then removes the mortar from the fl face, - The saw saw2 then removes the mortar from face f2.

[0059] The recycling machine includes a cam having a groove rainl and a gall roller adapted to slide in the groove rainl during movement along the direction dirl. The gall roller is connected, by means of an arm bral, to the support supl. The geometry of the groove rainl and the arm bral induces a 90-degree rotation of the support supl, the folded plate, and the block bl around the axis of rotation rotl at step S30, as shown in [Fig. 4]. In particular, during movement, the gall roller moves in a direction dir2 orthogonal to the direction of movement dirl, which induces the 90-degree rotation around the axis of rotation rotl.

[0060] At step S40, the brick bl, as well as the support supl and the folded plate, pass through the machining station su2. During this step, represented [Fig.5]; - The saw saw3 then removes the mortar from face f3, - The saw saw4 then removes the mortar from face f4.

[0061] The first machining station sul and the second machining station su2 are covered with a safety cover capl and cap 2.

[0062] Saw sciel is a circular saw rotating about an axis axl. Saw scie2 is a circular saw rotating about an axis ax2. Saw scie3 is a circular saw rotating about an axis ax3. Saw scie4 is a circular saw rotating about an axis ax4.

[0063] The distance between the saw sciel and the saw sciel2 can be adjusted by the adjustment wheels vol1 and vol2. Similarly, the distance between the saw sciel3 and the saw sciel4 can be adjusted by the adjustment wheels vol3 and vol4.

[0064] At step S50, the brick bl, as well as the support supl and the folded plate, exit the machining station su2 as shown [Fig.6].

[0065] At step S60, the backstop gate arl allows the pad bl to pass through, as shown [Fig.7], and the pad bl joins the output station ssl.

[0066] At step S70, the aforementioned piston moves the head tetl away from the block bl, as shown [Fig.8], so as to release the block bl.

[0067] At step S80, while the support supl and the folding plate return to the entry station sel. The non-return gate arl prevents the block bl from passing during this return, which causes the block bl to fall into the slide tobl, as shown [Fig.9].

[0068] For example, the slide tobl may include a groove to allow the support supl to pass through.

[0069] For example: - The non-return gate arl includes, for example, two rods to prevent the block bl from passing during the return of the transport element, and / or - The arl non-return gate is positioned, by gravity, in a position closing the passage of the block during the return of the transport element.

Claims

1. Demands Recycling machine (100) for a paving stone (bl) comprising a bonding material on four faces (fl, f2, f3, f4) out of its six faces and no bonding material on two other faces (f5, f6) out of its six faces, the paving stone being a rectangular prism, the four faces (fl, f2, f3, f4) being orthogonal to the other two faces (f5, f6), the recycling machine (100) comprising: - An input station (salt), - An output station (SSL), - A first machining station (sul), - A second machining station (su2), - A mechanized conveyor comprising a paving stone transport element (bl) in contact with one of the two other faces (f5, f6), the mechanized conveyor being capable of implementing the following steps: • At the entry station (salt), the paving stone (bl) is loaded by the transport unit, then: - A movement of the transport element, the transport element holding the block (bl) during the movement, from the input station (sel) to the output station (ssl) along a straight path having a direction (dirl), passing through: - The first machining station (sul), the first machining station (sul) being intended to remove the bonding material on the first two parallel faces (f2, f4), among the four faces, when the block (bl) passes through the first machining station (sul) during the movement, and - The second machining station (su2), the second machining station (su2) being intended for

2.

3.

4. remove the bonding material on two second faces (fl, f3), parallel to each other, among the four faces, when the block (bl) passes through the second machining station (su2) during the movement, the two second faces (fl, f3) being perpendicular to the first two faces (f2, f4), - And, an inter-station rotation of the block (bl) of 90 degrees around an inter-station rotation axis (rotl), between the first machining station (sul) and the second machining station (su2), the inter-station rotation axis (rotl) being parallel to the first two faces (f2, f4) and to the second two faces (f2, f4) during the rotation, • Then, at the exit station (ssl), the paving stone (bl) is unloaded by the transport unit, • Then, a return of the transport unit from the output station (ssl) to the input station (sel). Recycling machine (100) according to the preceding claim in which the paving stone (bl) is a building construction brick. Recycling machine (100) according to any one of the preceding claims in which the paving stone (bl) transport member comprises a support (supl) intended to support the paving stone (bl) by a fifth face (f5) among the other two faces (f5, f6), the mechanized conveyor moving the support (supl), during the movement, from the input station (sel) to the output station (ssl) along the straight path. Recycling machine (100) according to the preceding claim, wherein the infeed station (salt) comprises a table (table) having a cavity (cavl) and, during the loading step, the mechanized conveyor is capable of positioning the support (supl) in the cavity (cavl) so that the support (supl) touches the pad (bl) while the pad (bl) is placed on the table (tabl).

5. Recycling machine (100) according to claim 3 or 4, wherein the paver transport member (bl) comprises: - A head (tetl) intended to be in contact with a sixth face (f6), among the other two faces (f5, f6), opposite the fifth face (f5), during movement, - An actuator capable of: • Positioning the head (tetl) sufficiently far from the support (supl) to allow positioning of the paver (bl) between the support (supl) and the head (tetl), when the transport member is at the infeed station (sel), prior to the paver (bl) loading step, then • Pressing the head (tetl), during the paver (bl) loading step and during movement, against the sixth face (f6), so as to fix the paver (bl) between the support (supl) and the head (tetl) during movement and rotation, then • Moving the head (tetl) away from the paver (bl), during the unloading stage,in order to release the block (bl) from the transport mechanism.

6. Recycling machine (100) according to any one of the preceding claims in which the mechanized conveyor comprises, a hydraulic motor, driving the movement by means of a mechanical transmission of the mechanized conveyor.

7. Recycling machine (100) according to the preceding claim comprising: - A first hydraulic motor (ml) driving a first movement of the head (tetl) via a first mechanical transmission of the mechanized conveyor, and - A second hydraulic motor (m2) different from the first hydraulic motor (ml), driving a second movement of the support (supl) via

8.

9. of a second mechanical transmission of the mechanized conveyor. Recycling machine (100) according to any one of the preceding claims, wherein the first machining station (sul) comprises two first saws and the second machining station (su2) comprises two second saws, - A first saw (sciel), among the first two saws, being capable of removing the bonding material on a first face (fl), among the first two faces, when the block (bl) passes through the first machining station (sul), and - A second saw (saw2), among the first two saws, being capable of removing the bonding material on a second face (f2) opposite the first face (fl), among the first two faces, when the block (bl) passes through the first machining station (sul), and - A third saw (saw3), among the two second saws, being capable of removing the bonding material on a third face (f3), among the two second faces, when the block (bl) passes through the second machining station (su2), and - A fourth saw (saw4), among the two second saws, capable of removing the bonding material on a fourth face (f4) opposite the third face (f3), among the two second faces, when the block (bl) passes through the second machining station (su2). Recycling machine (100) according to the preceding claim, wherein: - The first saw (sciel) is a circular saw comprising a first axis of rotation (axl) perpendicular to the first face (fl) when the block (bl) passes through the first machining station (sul), the first saw (sciel) being capable of removing the bonding material on the first face (fl) when it rotates around the first axis of rotation (axl), and - The second saw (saw2) is a circular saw comprising a second axis of rotation (ax2) perpendicular to the second face (f2) when the block (bl) passes through the first machining station (sul), the second saw (saw2) being able to remove the bonding material on the second face (f2) when it rotates around the second axis of rotation (ax2), and - The third saw (saw3) is a circular saw comprising a third axis of rotation (ax3) perpendicular to the third face (f3) when the block (bl) passes through the second machining station (su2), the third saw (saw3) being able to remove the bonding material on the third face (f3) when it rotates around the third axis of rotation (ax3), and - The fourth saw (saw4) is a circular saw comprising a fourth axis of rotation (ax4) perpendicular to the fourth face (f4) when the block (bl) passes through the second machining station (su2), the fourth saw (saw4) being able to remove the bonding material on the fourth face (f4) when it rotates around the fourth axis of rotation (ax4).

10. Recycling machine (100) according to any one of the preceding claims in which the mechanized conveyor includes a grooved cam for generating rotation.

11. Recycling machine (100) according to any one of the preceding claims wherein the output station (ssl) comprises a slide (tobl) down which the paving stone (bl) slides after unloading.

12. Recycling machine (100) according to the preceding claim comprising a non-return gate (arl) capable of: - Letting the block (bl) pass during movement, then - Preventing the block (bl) from passing during the return of the transport member, from the exit station (ssl) to the entry station (sse), so as to cause the block (bl) to fall from the transport member into the chute (tobl).

13. A recycling process (100) for a paving stone (bl) comprising a bonding material on four faces (fl, f2, f3, f4) of its six faces and no bonding material on two other faces (f5, f6) of its six faces, the paving stone being a rectangular paving stone, the four faces (fl, f2, f3, f4) being orthogonal to the other two faces (f5, f6), the recycling machine (100) comprising: An input station (sel), an output station (ssl), a first machining station (sul), a second machining station (su2), a mechanized conveyor comprising a paving stone transport element (bl) in contact with one of the other two faces (f5, f6), the process comprising the following steps implemented by the mechanized conveyor: • At the input station (sel), the block (bl) is loaded (S10) by the transport element, then: - The transport element moves, holding the block (bl) during the movement, from the input station (sel) to the output station (ssl) along a straight path in a direction (dirl), passing through; - The first machining station (sul), the process comprising a step (S20) in which the first machining station (sul) removes the bonding material from two first faces (f2, f4) parallel to each other, out of the four faces, when the block (bl) passes through the first machining station (sul) during the movement, and - The second machining station (su2), the process comprising a step (S40) in which the second machining station (su2) removes the bonding material from two second faces (fl, f3), parallel to each other, among the four faces, when the block passes through the second machining station (su2) during the movement, the two second faces (fl, f3) being perpendicular to the two first faces (f2, f4), - And, an inter-station rotation (S30) of the block (bl) of 90 degrees around an inter-station rotation axis (rotl), between the first machining station (sul) and the second machining station (su2), the inter-station rotation axis (rotl) being parallel to the first two faces (f2, f4) and to the second two faces (f2, f4) during the rotation, Then, at the exit station (ssl), an unloading (S70) of the paving stone (bl) by the transport unit, Then, a return (S80) of the transport unit from the exit station (ssl) to the entry station (sel).

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