A method for inspecting the internal surface of a tire, an inspection unit and a computer program product, and a tire processing assembly comprising the inspection unit.

Abstract

The present invention relates to a method for inspecting an inner surface of a tire having a splice extending along said inner surface in a splice direction perpendicular to the circumferential direction of the tire, comprising scanning the splice with an imaging device while moving a field of view of the imaging device along the splice. The present invention further relates to an inspection unit for inspecting the inner surface of a tire according to the method of the invention, comprising a base, an imaging device and a drive assembly for driving the movement of the imaging device relative to the base in an inspection plane and for driving the rotation of the imaging device about an axis of rotation perpendicular to the inspection plane.

Description

Technical Field

[0001] The present invention relates to a method, an inspection unit, and a computer program product for inspecting the inner surface of a tire, particularly for inspecting the splice of an inner liner of a green tire. The present invention further relates to a processing assembly for processing a tire, wherein the processing assembly comprises an inspection unit according to the present invention.

Background Art

[0002] U.S. Patent No. 11,198,339 B2 discloses an apparatus for detecting and checking defects on a tire at the end of a manufacturing process. The apparatus has a work station having a workbench with a rotary table for supporting the tire, a profilometer, a high-resolution color linear camera for scanning the outer surfaces of the tire tread and tire shoulder, a mechanical support for the profilometer and the color linear camera, a data processor for storing and processing the data detected by the profilometer and the color linear camera, for providing a three-dimensional model of the tire, and for managing a database containing parameters indicating the surface characteristics of a defect-free tire, and an interface for facilitating the interaction between the operator and the apparatus. The profilometer and the color linear camera are configured to operate simultaneously while the tire is rotating on the rotary table at a controlled speed to perform a complete scan of all profiles of the inner and outer surfaces of the tire. The data processor is adapted to define and classify detected defects by comparing at least one corresponding parameter of a defect-free tire of the same type as the tire being tested with the parameters detected by the profilometer and the color linear camera.

[0003] EP1043578B1 discloses an inspection apparatus for a tire in which the tire is supported on a positioning device and a measuring head is supported on a portal above the positioning device. A holder for the measuring head, extending downward from the portal, can be moved biaxially on and along an axis perpendicular to it. Furthermore, the holder can be rotated around its longitudinal axis or around an axis perpendicular to the contact surface of the positioning device for the tire. The measuring head can be moved up and down along the holder. Vertical adjustability of the measuring head can also be achieved by adjusting the holder itself, in particular by setting the holder in the longitudinal direction. The measuring head is further mounted rotatably around an axis relative to the holder.

[0004] EP1043578B1 further discloses an inspection apparatus provided with three measuring heads, two for inspecting the inside of a tire casing and one for inspecting the outside thereof. The measuring heads are mounted on a holder supported on a portal. The holder is vertically adjustable and rotatable about its longitudinal axis. Each measuring head is mounted on the holder in a multi-axis adjustable manner. On the one hand, they can be moved along radial axes, i.e., they are settable at their distance from the holder. In this way, the inspection apparatus can be set or adapted to different tire diameters. Furthermore, all measuring heads are supported on a beam so as to be rotatable in any case about a rotation axis, thereby connecting them to the holder. The rotation axis of the measuring head preferably extends tangentially with respect to a virtual circle about the rotation axis of the tire. Furthermore, for inspection of the inside of the tire, the measuring head is adjustable perpendicular to the holder along an axis extending parallel to the adjustment axis of the holder. Therefore, the measuring head can be vertically adjusted together with the holder, and furthermore, vertical adjustment of the measuring head can be achieved relative to the holder.

[0005] The comprehensive adjustability of the measuring heads, either independently or simultaneously, allows for optimal adjustment of a single measuring head to the tire section to be inspected in each case. On the other hand, after individual adjustments, the tire can be moved along it with the rotation of the holder through its longitudinal axis. [Overview of the project]

[0006] A drawback of known devices for detecting and checking defects is that scanning the entire tire is time-consuming. Furthermore, a large amount of data needs to be collected to provide usable data in all three dimensions.

[0007] Furthermore, scanning the entire tire requires placing the tire on a separate rotating table or positioning device. Placing the tire on a rotating table or positioning device can introduce inaccuracies in the tire's positioning relative to the profile meter and camera. Additionally, the tire needs to be inverted on the rotating table to allow scanning of all surfaces of the tire. This inversion can introduce further inaccuracies, making it difficult to correlate measurements from both sides and potentially delaying the inspection process.

[0008] The object of the present invention is to provide a method for inspecting the internal surface of a tire, an inspection unit, a tire processing assembly comprising the inspection unit, and a computer program product that can inspect a green tire more efficiently and / or more precisely.

[0009] According to a first aspect, the present invention provides a method for inspecting the inner surface of a tire having a splice extending along the inner surface in a splice direction perpendicular to the circumferential direction of the tire, the method comprising scanning the splice with an imaging device while moving the field of view of the imaging device along the splice.

[0010] Defects or anomalies on the inner surface of a green tire are often located at or near the splice. Since the field of view of the imaging device is moved along the splice, i.e., in the direction of the splice, while scanning the inner surface of the tire, the splice can be scanned and / or inspected more precisely, accurately, or more effectively. Furthermore, the need to scan the entire periphery or circumference of the inner surface of the tire is eliminated. Thus, the inner surface of the tire can be scanned without rotating the tire around its central axis. Therefore, the tire does not need to be laid down for scanning. In addition, the tire does not need to be inverted or turned upside down. Thus, the splice can be scanned or inspected more effectively and / or efficiently.

[0011] In one embodiment, the method comprises scanning a splice using an imaging device while moving the field of view of the imaging device along several separate inspection paths along the inner surface of the tire. Thus, the complex contour of the inner surface of the tire can be subdivided into multiple inspection paths. In other words, the method can enable the imaging device to inspect the inner surface of the tire by moving the imaging device along a sequence, series, or superposition of inspection paths. Each inspection path can accurately represent a portion of the inner surface of the tire without the need to replicate the entire contour of the inner surface of the tire. Thus, the inspection paths can be defined in the basic and / or fundamental movement of the imaging device. Thus, moving the imaging device along the splice can be simplified. Thus, the imaging device can be moved more effectively along the splice. Preferably, the inspection paths overlap the splice at least partially. Thus, the splice can be effectively inspected by moving the field of view along several separate inspection paths.

[0012] In a further embodiment, moving the field of view of the imaging device along each of several separate inspection paths comprises the following:

[0013] a) Moving the imaging device from the initial examination position to a consecutive examination position, and / or b) Rotating the field of view of the imaging device to a series of inspection angles from the initial inspection angle around a rotation axis extending perpendicular to the splice direction. In other words, the field of view can be moved along each inspection path by either moving the imaging device or rotating the field of view, or by both moving the imaging device and rotating the field of view. Thus, each inspection path can be defined by the initial inspection position and the subsequent inspection positions and / or by the initial inspection position and the subsequent inspection positions alone. Thus, the inspection positions and / or inspection angles can be adjusted to accurately or precisely conform to the shape of a section or part of the inner surface of the tire. Preferably, the inspection positions are predetermined based on the configuration and / or shape of the tire. In particular, each inspection position may be set at a predetermined distance from the inner surface of the tire, for example, within the focal length of the imaging device. Thus, the imaging device can scan or inspect the splice more accurately or precisely along each inspection path.

[0014] In one embodiment, among several separate inspection paths, the inspection paths are consecutive inspection paths. Preferably, the consecutive inspection position of the first inspection path is the first inspection position of the consecutive inspection path, and the consecutive inspection angle of the first inspection path is the first inspection angle of the consecutive inspection path. In other words, the inspection paths may be adjacent or nearby inspection paths. Alternatively, the inspection paths may partially overlap. The inspection paths may be combined or superimposed to perform scanning along the tire splice.

[0015] In a further preferred embodiment, in step a), the imaging device is moved linearly from the initial inspection position to a series of inspection positions.

[0016] In further embodiments, steps a) and b) are performed simultaneously to move the field of view of the imaging device along each of several separate inspection paths. Preferably, the field of view direction is gradually rotated from the initial inspection angle to a series of inspection angles while the imaging device is moved from the initial inspection position to successive inspection positions. In other words, the rotation of the field of view direction can be linked to the movement of the imaging device for each inspection path. Thus, the scanning of the splice along each inspection path can be more uniform or consistent. Alternatively, the imaging device may, for example, be moved first to an inspection position, and then its field of view direction is rotated while scanning the inner surface of the tire.

[0017] In a further embodiment, the initial and subsequent inspection positions for each of several separate inspection paths are located in a common inspection plane. In other words, the method comprises moving the inspection unit within the inspection plane. Preferably, the axis of rotation extends perpendicular to the inspection plane. In other words, the field of view of the inspection unit is also directed towards the inspection plane. Thus, an inspection path with a field of view can also extend into the inspection plane.

[0018] In further embodiments, the method comprises selecting a first inspection position and one or more further inspection positions such that at least a portion of the splice is parallel, substantially parallel to, or extends into the inspection plane. Preferably, the imaging device has a field of view that is symmetrical with respect to the inspection plane. Thus, the field of view may be centered on or near the splice. Thus, the splice can be scanned or inspected more accurately or precisely.

[0019] In a further embodiment, the method further comprises calibrating one of several separate inspection paths before scanning the splice, wherein the calibration is - A step of moving the field of view of the imaging device along each of several separate examination paths, - For each inspection path, the steps include determining the relative distance between the imaging device and the inner surface of the tire, - The procedure includes the step of adjusting each initial and subsequent inspection position and / or each initial and subsequent inspection angle when the distance between them is outside a predetermined range. Distances outside the predetermined reference range may indicate, for example, an error in the shape or configuration of the tire or an improperly selected inspection position and / or inspection angle. Therefore, when the distance is not within the predetermined range, the tire configuration, inspection position and / or inspection angle may be adjusted. The predetermined range may include, for example, the focal length or focal range of an imaging device. Calibration can improve the accuracy and / or precision of the inspection.

[0020] Calibration can be performed by adjusting individual inspection positions and / or inspection angles. Therefore, it is not necessary to recalculate the entire trajectory of the imaging unit. Thus, calibration can be performed more effectively.

[0021] Preferably, calibration is performed on a first tire or a series of tires having the same configuration. Thus, a single calibration of the inspection position can be performed on the first tire to calibrate the inspection position for all tires in the series. Therefore, process efficiency can be improved.

[0022] In a further embodiment, calibration is performed - A step of determining the mutual distance between the inspection plane and the splice, - The procedure further comprises the step of rotating the inspection plane around the pivot axis when the relative distance is outside a predetermined distance. Thus, the angle of the inspection plane with respect to the splice can be corrected. In other words, the inspection plane can be aligned with the splice, or substantially aligned with the splice. Thus, the accuracy and / or precision of the splice inspection can be improved.

[0023] In a further embodiment, several separate inspection paths are within the range from 1 to 19, preferably within the range from 4 to 14, more preferably within the range from 7 to 9. The said number of inspection paths can be large enough to accurately scan the inner surface of the tire along the splice. Further, the said number of inspection paths can be small enough to effectively and / or efficiently scan the inner surface of the tire.

[0024] In a further embodiment, the movement of the imaging device along the splice is computer controlled and / or automated. In other words, the imaging device can be automatically moved to subsequent inspection positions and rotated to subsequent inspection angles. Thus, the inner surface of the tire can be inspected more effectively and / or efficiently.

[0025] In a further embodiment, the method comprises supporting the tire in an upright orientation during inspection of the inner surface. In the said upright orientation, the central axis of the tire extends horizontally or substantially horizontally. The tire can be inspected, for example, while being conveyed in an upright orientation. Thus, the process efficiency can be further improved.

[0026] According to a second aspect, the present invention is an inspection unit for inspecting the inner surface of a tire according to the steps of the method of the first aspect of the present invention, comprising a base, an imaging device, and a drive assembly for driving the movement of the imaging device relative to the base in an inspection plane and for driving the rotation of the imaging device about a rotation axis perpendicular to the inspection plane, and further comprising a control unit operatively connected to the drive assembly for controlling the movement of the imaging device relative to the base in the inspection plane and for controlling the rotation of the imaging device about the rotation axis, wherein the control unit is configured to control the drive assembly to subsequently position the imaging device at several separate predetermined inspection positions in the inspection plane and at related inspection angles about the rotation axis, relating to the inspection unit.

[0027] The inspection unit is configured to perform the method according to the first aspect of the present invention. Thus, the inspection unit has the same advantages as those described above. In particular, the inspection unit can move and rotate the field of view of the imaging device within the inspection plane. Thus, the inspection unit can be used to follow the splice on the inner surface of the tire when the tire is given a suitable orientation, for example, when the inspection plane intersects the radial plane of the tire. In particular, the inspection unit can then move the field of view of the imaging device along several separate consecutive inspection paths by placing the imaging device at two or more inspection positions and / or by rotating the imaging device at two or more inspection angles. The control unit can comprise a database with predetermined inspection positions. The inspection positions can depend, for example, on the configuration and / or dimensions of the tire.

[0028] In one embodiment thereof, the control unit is further operatively connected to the imaging device, wherein the control unit is configured to use the imaging device to scan the inner surface of the tire while moving the imaging device between predetermined inspection positions and / or between associated inspection angles. In other words, the imaging device can scan the inner surface of the tire while moving the imaging device in the inspection plane. More specifically, the imaging device can scan the splice while moving along the splice.

[0029] <>

[0030] ​In a further embodiment thereof, the initial inspection angle and the subsequent inspection angle are the same for the associated initial inspection position and a subsequent inspection position different from the initial inspection position. In other words, the control unit may be configured to move the imaging device between two consecutive or subsequent inspection positions without rotating the imaging device.

[0031] In a further embodiment thereof, the initial inspection position and the subsequent inspection position are the same with respect to the associated initial inspection angle and the subsequent inspection angle which is different from the initial inspection angle. In other words, the control unit may be configured to rotate the imaging device between consecutive inspection angles without translating the imaging device.

[0032] In further embodiments, several separate predetermined inspection positions and associated inspection angles are in the range of 2 to 20, preferably 5 to 15, and more preferably 8 to 10. The number of inspection paths can be large enough to accurately scan the inner surface of the tire along the splice. Furthermore, the number of inspection paths can be small enough to effectively and / or efficiently scan the inner surface of the tire.

[0033] In a further embodiment, the inspection unit is configured to measure the distance between the imaging device and the inner surface of the tire.

[0034] In further embodiments, the imaging device is movable relative to the base along the inspection plane in a first direction and a second direction perpendicular or perpendicular to the first direction. In other words, the inspection plane extends in the first and second directions. By moving the imaging device in the first and second directions, the imaging device can be positioned at any desired location in the inspection plane. Furthermore, by moving the imaging device in the first and second directions, the imaging device can be inserted through one of the openings in the tire or into the interior or sealed volume of the tire.

[0035] In a further embodiment thereof, the drive assembly is pivotable relative to the base around a pivot axis extending in a first direction to pivot the inspection plane relative to the base. In other words, the angular position of the inspection plane relative to the base can be adjusted. Thus, the angular position of the inspection plane can be adjusted to the angle of the splice with respect to the circumferential direction of the tire. Thus, the imaging device can be displaced more precisely along the splice. Thus, the splice can be inspected more accurately.

[0036] In one preferred embodiment, the first direction is the vertical direction. Therefore, the inspection plane is the vertical plane. Moving the imaging device within the vertical plane can facilitate inspection of the tire in an upright orientation.

[0037] In further embodiments, the drive assembly comprises a first member movable relative to a base and a second member movable relative to the first member, wherein the imaging device is rotatably mounted on the second member for rotation around a rotation axis. Preferably, the drive assembly further comprises a first linear drive for driving the movement of the first member relative to the base in a first direction and a second linear drive for driving the movement of the second member relative to the first member in a second direction. Thus, the imaging device can be moved independently in the first and second directions and rotated around a rotation axis.

[0038] In a further embodiment, the drive assembly further comprises a rotation drive for driving the rotation of the imaging device around a rotation axis. In other words, the imaging device may rotate around a rotation axis independently of the movement of the imaging device in the inspection plane.

[0039] In one embodiment, the rotational drive is a belt drive comprising a plurality of pulleys and a belt guided along the plurality of pulleys, wherein the plurality of pulleys comprises an actuating pulley that rotates and is coupled to an imaging device. Preferably, the actuating pulley is rotatable around a rotation axis. Thus, the imaging device can be rotated by driving the belt along the pulleys. Preferably, the belt is an endless belt that loops around the pulleys. Preferably, the belt is a toothed belt. A toothed belt can impart rotation on the actuating pulley more accurately and / or precisely.

[0040] In further embodiments, the pulleys include driven pulleys for driving a belt, where the driven pulleys are located on or on the base of the first member. Thus, the rotational drive can influence the rotation of the imaging device around the axis of rotation without the need to mount a motor or drive unit on the second member. Consequently, less weight is added to the second member, and less force is required to displace the second member. Thus, the second member and the imaging device attached thereto can be displaced more accurately, precisely, and / or efficiently.

[0041] In a further preferred embodiment, the imaging device has a field of view between 25 and 45 degrees, preferably between 30 and 40 degrees. Preferably, the field of view is determined in a direction perpendicular to the inspection plane. The field of view is oriented in the field of view direction and / or centered thereon. Preferably, the field of view is centered with respect to the inspection plane, i.e., the field of view direction extends into the inspection plane.

[0042] In further embodiments, the imaging device comprises a laser emitter for projecting a laser beam onto the inner surface of a tire and a camera for capturing an image of the laser beam. Preferably, the imaging device is configured to project a laser beam onto the inner surface of the tire such that the laser beam extends perpendicular or substantially perpendicular to the inspection plane. The laser emitter and camera may be a suitable setup for imaging or scanning a profile of the inner surface of the tire, particularly splices on the inner surface.

[0043] According to a third aspect, the present invention provides a processing assembly for processing a tire, comprising an inspection unit according to a second aspect of the present invention, and further comprising one or more support members for supporting the tire at a support position relative to the inspection unit where the inspection plane intersects the tire when the tire is in a support position.

[0044] The processing assembly comprises the inspection unit according to the preceding claims and therefore essentially has the same advantages as those described above.

[0045] In one embodiment, the inspection unit is positionable with respect to one or more support members at an inspection position where the inspection plane extends perpendicularly to or obliquely to the tire's central plane when the tire is in a support position. Thus, the inspection plane may be positioned to extend along the tire splice. Consequently, the inspection unit can move the imaging device more accurately and / or precisely along the splice.

[0046] In one embodiment, the inspection unit is pivotable around a pivot axis relative to one or more support members to adjust the angle between the inspection plane and the central plane. Thus, the inspection plane can be adjusted to the angle of the splice. Thus, the inspection plane can be positioned more precisely along the splice. Thus, the splice can be tested more accurately and / or precisely.

[0047] In further embodiments, the tire is configured to be upright or vertical in the support position. The tire may be supported or suspended, for example, on its internal rim or on its external surface, i.e., the threaded surface. The upright orientation may allow the imaging device of the inspection unit to be inserted horizontally or substantially horizontally through the opening in the tire. In the upright orientation, the tire does not need to be supported on the sidewall. Therefore, tire deformation can be reduced or prevented. Thus, the sidewall can be monitored more accurately and / or precisely.

[0048] In a further embodiment, the processing assembly further comprises a transport device for transporting tires along a transport path, wherein the transport device comprises one or more support members for supporting the tires, and wherein an inspection unit is configured along the transport path. Preferably, the inspection unit is configured to inspect the tires on the transport device without removing the tires from the transport device. Thus, the tires can be inspected while they are being transported. In other words, a separate inspection station for inspecting the tires is not required. Thus, all tires can be inspected during the manufacturing process. Thus, tire inspection can be performed.

[0049] In a further embodiment thereof, the transport device is configured to transport the tire in an upright orientation. The tire may be supported or suspended, for example, on its internal rim or on its external surface, i.e., on its threaded surface. The upright orientation may allow the imaging device of the inspection unit to be inserted horizontally or substantially horizontally through the opening in the tire.

[0050] According to a fourth aspect, the present invention provides a computer program product comprising instructions for causing an inspection unit according to a second aspect of the present invention or a processing assembly according to a third aspect of the present invention to carry out a method according to a first aspect of the present invention.

[0051] The various embodiments and features described and presented herein may be applied individually whenever possible. These individual embodiments, in particular those described in the attached dependent claims, may be the subject of a divisional patent application.

[0052] The present invention will be described based on exemplary embodiments shown in the accompanying schematic diagrams. [Brief explanation of the drawing]

[0053] [Figure 1A] A plan view of an assembly for handling tires according to the present invention, which includes an inspection unit according to the present invention. [Figure 1B] A plan view of an assembly for handling tires according to the present invention, which includes an inspection unit according to the present invention. [Figure 1C] A plan view of an assembly for handling tires according to the present invention, which includes an inspection unit according to the present invention. [Figure 1D] A plan view of an assembly for handling tires according to the present invention, which includes an inspection unit according to the present invention. [Figure 1E] A plan view of an assembly for handling tires according to the present invention, which includes an inspection unit according to the present invention. [Figure 1F] A plan view of an assembly for handling tires according to the present invention, which includes an inspection unit according to the present invention. [Figure 2A] A side view of the inspection unit of the present invention by line II-II in Figure 1D during an exemplary step of inspecting a tire. [Figure 2B] A side view of the inspection unit of the present invention by line II-II in Figure 1D during an exemplary step of inspecting a tire. [Figure 2C] A side view of the inspection unit of the present invention by line II-II in Figure 1D during an exemplary step of inspecting a tire. [Figure 2D] A side view of the inspection unit of the present invention by line II-II in Figure 1D during an exemplary step of inspecting a tire. [Figure 2E] A side view of the inspection unit of the present invention by line II-II in Figure 1D during an exemplary step of inspecting a tire. [Figure 2F] A side view of the inspection unit of the present invention by line II-II in Figure 1D during an exemplary step of inspecting a tire. [Figure 2G] A side view of the inspection unit of the present invention by line II-II in Figure 1D during an exemplary step of inspecting a tire. [Figure 3] Cross-sectional view of the inspection unit along line IV-IV in Figure 2D. [Figure 4A] Cross-sectional view of the inspection unit by line VV in Figure 3 during a further exemplary step of inspecting a tire. [Figure 4B] Cross-sectional view of the inspection unit by line VV in Figure 3 during a further exemplary step of inspecting a tire. [Figure 5A] A diagram illustrating exemplary steps of a method for laying a tire down using a laying device according to one embodiment of the present invention. [Figure 5B] A diagram illustrating exemplary steps of a method for laying a tire down using a laying device according to one embodiment of the present invention. [Figure 6A] A diagram illustrating exemplary steps of a method for laying a tire using an alternative laying device according to an alternative embodiment of the present invention. [Figure 6B] A diagram illustrating exemplary steps of a method for laying a tire using an alternative laying device according to an alternative embodiment of the present invention. [Modes for carrying out the invention]

[0054] Figures 1A to 1F show plan or top views of a processing assembly 10 for processing a tire 9, in particular a green or unvulcanized tire, according to an exemplary embodiment of the present invention.

[0055] As is best seen in Figures 2A to 2G, the tire 9 generally has a cylindrical or toroidal shape extending circumferentially and / or concentrically around the tire axis X. Specifically, the tire 9 has a C-shaped, U-shaped, or substantially C-shaped or substantially U-shaped cross-section extending circumferentially C around the tire axis X. The tire 9 further defines a central plane U, which extends perpendicular to the tire axis X. Preferably, the central plane U is a plane of symmetry.

[0056] The tire 9 has a first side 93 and a second side 94 on either side of the lateral tire 9 extending parallel to the tire axis X. In other words, the first side 93 and the second side 94 are located on either side of the central plane U. The tire 9 has two circular or substantially circular openings 90 on each side 93, 94. The openings 90 extend concentrically or circumferentially around the tire axis X.

[0057] The tire 9 further has an external surface 92 that faces outward radially with respect to the tire axle X. The external surface may be formed, for example, by a tread layer (not shown). The external surface 92 extends circumferentially and / or concentrically around the tire axle X. The tire 9 further has an internal surface 91 that faces inward radially, i.e., the internal surface 91 faces toward the tire axle X. The internal surface 91 and the sides 93, 94 define the internal volume V of the tire 9.

[0058] In this particular example, the inner surface is at least partially formed by an inner liner, which is joined to or along the inner surface 91 at a splice G. The splice G extends on or along the inner surface 91 in a splice direction D perpendicular to the circumferential direction C of the tire 9. Depending on the configuration of the tire 9, the splice direction D may be perpendicular to the circumferential direction C of the tire 9, i.e., parallel to the tire axis X. Alternatively, the splice direction D may extend at an acute or obtuse angle with respect to the circumferential direction of the tire 9.

[0059] As further shown in Figures 1A to 1F, the processing assembly 10 comprises a tire construction drum 11 for assembling and / or shaping the tire 9, a lateral device 12 for receiving the tire 9 and positioning the tire 9 in a lateral orientation, and a transport device 13 for transporting the tire 9 from the tire construction drum 11 to the lateral device 12. The tire processing assembly 10 further comprises a transport ring 14 for removing the tire 9 from the tire construction drum 11 and transporting the tire 9 to the transport device 13.

[0060] The transport device 13 comprises a rail 130 extending between the transport ring 14 and the lateral device 12, and a carriage 133 that is movable along the rail 130. In this particular embodiment, the rail extends from the transport ring 14 to the lateral device 12 in the transport direction T. Thus, the carriage 133 is movable along the rail 130 in the transport direction T to transport the tire 9 from the transport ring 14 to the lateral device 12.

[0061] As can be seen best in Figures 2A to 2G, the transport device 13 further comprises one or more support members 131, preferably one or more support rollers, for supporting the tire 9. More specifically, one or more support members 131 are configured to support the tire 9 in a support position relative to the inspection unit 1. When in the support position, the inspection unit 1 can be positioned in an inspection position where the inspection plane P intersects with the tire 9. More specifically, in the inspection position, the inspection plane P intersects with the central plane U of the tire 9.

[0062] The support member 131 protrudes from the carriage 133 and is carried or supported by the carriage 133. In the illustrated embodiment, the support member 131 is configured to support the internal rim of the tire 9. In other words, one or more support members 131 are configured to be inserted through the opening 90 of the tire 9. Alternatively, the support member may be configured to support the circumferential outer surface 92 of the tire 9.

[0063] The transport device 13 is configured to hold the tire 9 in an upright orientation, i.e., with the tire axis X extending horizontally or substantially horizontally. Preferably, the transport device 13 is configured to transport the tire 9 in an orientation in which the tire axis X extends perpendicular or perpendicular to the transport direction T. In particular, the support member 131 extends perpendicular or perpendicular to the transport direction T while transporting the tire 9 in the transport direction T.

[0064] Optionally, the transport device 13 may be further provided with one or more load cells 132 for measuring the weight of the tire 9. Preferably, each of the one or more load cells 132 is located between the carrier 133 and each of the support members 131. Thus, the weight of the tire 9 can be measured while the tire is being transported by the transport device 13. Therefore, a separate weighing station is not required.

[0065] The transport device 13 may further include a sticker applicator 15 for applying stickers to the tire 9. Alternatively, a marker applicator may be used to apply markings or markers to the tire 9. The stickers, markings, or markers may, for example, contain information about the configuration and / or dimensions of the tire 9. Additionally or alternatively, the weight of the tire 9, as measured by the load cell 132, may be marked on the tire 9. The sticker applicator 15 can apply stickers to the tire 9 while the tire 9 is being transported by the transport device 13. Therefore, a separate sticker application station or marking station is not required.

[0066] As can be seen further in Figures 1D and 1E, the transport device 13 may be configured to rotate or pivot the tire 9 around the transport axis Y in the transport direction for transporting the tire 9 to the lateral device 12. In particular, as shown in Figures 5A and 6A, the carrier 133 is rotatable around the transport axis Y relative to the rail 130. In the transport direction, the tire axis X extends parallel to or substantially parallel to the transport direction Z.

[0067] As shown in Figures 5A and 5B, the transverse unit 12 comprises a transverse support 121 and a plurality of transverse rollers 122. The transverse rollers 122 and the transverse support 121 form an L-shaped or substantially L-shaped frame for supporting the tire 9. The frame is pivotable around a transverse axis E between the receiving orientation shown in Figure 5A and the transverse orientation shown in Figure 5B. The transverse axis E is located upstream of the transverse rollers 122 in the conveying direction T. Each of the transverse rollers 122 and the transverse support 121 extends perpendicular to the transverse axis E. Preferably, the transverse rollers form a roller conveyor section. The transverse support 121 may also comprise a roller conveyor.

[0068] As shown in Figure 5A, in the receiving orientation, the transverse roller 122 generally extends vertically or upward. The transverse support 121 extends horizontally or substantially horizontally. The tire 9 is transported to the transverse unit 12 such that its outer surface 92 faces the transverse support 121 and its first side 93 faces the transverse roller 122. Preferably, the tire 9 is supported by its outer surface 92 on the transverse support 121. Optionally, the first side 93 of the tire 9 abuts against the transverse roller 122. When the tire 9 is supported on the transverse support 121, the support member 131 of the transport device 13 may be retracted from the tire 9. The transverse device 12 may then be rotated from the receiving orientation to the transverse orientation.

[0069] As shown in Figure 5B, in the transverse orientation, the transverse roller 122 extends in a horizontal plane or substantially in a horizontal plane. The tire 9 is swung around the transverse axis E and is now supported on the transverse roller 122 by its first side 93. The tire 9 can then be further transported on its first side 93.

[0070] Figures 6A and 6B show an alternative lateral device 212. The alternative lateral device 212 differs from the previously described lateral device 12 in that the lateral axis E is located downstream of the lateral roller 222 in the transport direction T. The lateral roller 222 is configured to accommodate the support member 131 of the transport device 13.

[0071] The tire processing assembly 10 further comprises an inspection unit 1 for inspecting the tire 9, in particular the inner surface 91 of the tire 9. More specifically, the inspection unit is configured to inspect splices G on the inner surface 91 of the tire 9. The inspection unit 1 is configured along the transport device 13. In particular, the inspection unit 1 is configured along or next to the transport device in a direction perpendicular to the transport direction Z. The inspection unit 1 is configured to reach the internal volume of the tire 9 through one of the openings 90 while the tire is supported by the transport device 13.

[0072] As best shown in Figures 2A to 2F, the inspection unit 1 comprises an imaging device 2 for scanning or imaging the inner surface 91 of the tire 9. The imaging device 2 may comprise, for example, a profiler or profiler for detecting and / or imaging the height profile of the inner surface 91 of the tire 9. In this particular embodiment, the imaging device 2 comprises a laser emitter for projecting a laser beam L onto the inner surface 91 of the tire 9 and a camera for capturing an image of the laser beam L on the inner surface 91.

[0073] Optionally, the transport device 13 further comprises a shielding unit 134 for shielding the laser of the imaging device 2. In particular, the shielding unit is configured to prevent the laser of the imaging unit from being emitted outside the tire 9 through the opening 90 of the tire 9. The shielding unit 134 is supported and / or suspended on the carrier 133. The shielding unit 134 is configured to cover at least a portion of the tire opening 90 along the tire axis X. The shielding unit 134 may comprise, for example, a plate or sheet of laser shielding material.

[0074] The camera of imaging device 2 has a field of view W directed along and / or centered on the field of view direction F. The field of view direction F extends at a slight angle with respect to the emitted laser for capturing a profile of the internal surface 91 along the projected laser beam L. In particular, the field of view direction F is directed at such an angle with respect to the emitted laser, where the projected laser beam L is within the field of view W of imaging device 2.

[0075] As shown in Figures 3, 4A, and 4B, the imaging device 2 is configured to project the laser beam L such that the laser beam L extends perpendicular or perpendicular to the splice G. More specifically, the imaging device 2 is configured to project the laser beam L onto the inner surface 91 of the tire 9 such that the laser beam extends perpendicular or substantially perpendicular to the inspection plane P. In this particular embodiment, the field of view W around the viewing direction F, i.e., in the direction of the projected laser beam L, is between 25 and 45 degrees. Preferably, the field of view W in the direction of the projected laser beam L is between 30 and 40 degrees.

[0076] The imaging device 2 may have, for example, a focal length of 40 millimeters in the field of view direction F and a focal range between 5 millimeters and 75 millimeters.

[0077] Preferably, the inspection unit 1 is configured to measure the distance between the imaging device 2 and the inner surface 91 of the tire 9. For example, the imaging device 2 may include a triangulation camera for determining the distance.

[0078] The inspection unit 1 further comprises a base 8 and a drive assembly 3 for moving the imaging device 2 relative to the base 8. In particular, the drive assembly 3 is configured to drive the movement of the imaging device 2 relative to the base 8 in the inspection plane P. As shown in Figures 2A to 2F, the inspection plane P extends in a first direction A and a second direction B perpendicular or perpendicular to the first direction A. Preferably, as shown in Figures 2A to 2F, the first direction A is vertical or upright. In other words, the inspection plane P is a vertical or upright plane.

[0079] The drive assembly 3 comprises a first member 31 that is movable relative to the base 8, and a first drive 4 for driving the movement of the first member 31 relative to the base 8. In the illustrated embodiment, the first member 31 is movable relative to the base 8 in a first direction A. Therefore, the first drive 4 is a linear drive. In particular, the first drive 4 comprises a spindle 41 for moving the first member 31 back and forth in the first direction A.

[0080] The drive assembly 3 further comprises a second member 32 that is movable relative to the first member 31, and a second drive 5 for driving the movement of the second member 32 relative to the first member 31. In the illustrated embodiment, the second member 32 is movable relative to the first member 31 in a second direction B. In this particular embodiment, the second drive 5 is a linear drive comprising a belt and pulley system having a first pulley 51 and a second pulley 52. ​​Alternatively, the second drive 5 may comprise, for example, a spindle drive.

[0081] As can be seen further in Figures 2A to 2F, the drive assembly 3 is further configured to drive the rotation of the imaging device 2 around a rotation axis R perpendicular to the inspection plane P. In particular, the drive assembly 3 is configured to drive the rotation of the imaging device 2 around the rotation axis R relative to the second member 32.

[0082] The drive assembly 3 includes a rotary drive 6 for driving the rotation of the imaging device 2 around a rotation axis R. The rotary drive 6 includes a plurality of pulleys 63, 64, 65 and a belt 61 guided along the plurality of pulleys 63, 64, 65. Preferably, the belt 61 is a toothed belt.

[0083] The pulleys 63, 64, 65 include a third pulley or driven pulley 63 for driving the belt 61. The driven pulley 63 may be driven, for example, by a servo motor (not shown). The driven pulley 63 is located on the first member 31 of the drive assembly 3. Alternatively, the driven pulley 63 may be located, for example, on the base 8. Thus, the associated servo motor may be located away from the second member 32 of the drive assembly 3. Thus, the second member 32 can be moved more accurately, precisely and / or efficiently in the second direction B.

[0084] The multiple pulleys 63, 64, and 65 further comprise an actuating pulley 65 that rotates and couples with the imaging device 2. In other words, the rotation of the imaging device 2 is driven by the actuating pulley 65 around the axis of rotation R. The actuating pulley 65 is mounted on a second member 32 of the drive assembly 3. In the illustrated embodiment, the actuating pulley 65 is rotatable around the axis of rotation R. Preferably, the imaging device 2 is co-rotatable with or rotatable together with the actuating pulley 65.

[0085] One or more pulleys 63, 64, 65 further comprise a plurality of fourth pulleys 64 for guiding the belt 61 between the actuating pulley 65 and the driven pulley 63. The fourth pulleys 64 are passive pulleys, i.e., they are freely rotatable. The fourth pulleys 64 are distributed between the first member 31 and the second member 32 of the drive assembly 3. In particular, the fourth pulleys 64 are configured to allow the belt 61 to expand and contract using the movement of the second member 32 relative to the first member 31.

[0086] As further shown in Figures 2A to 2F, the rotational drive comprises two tension rollers 66. One of the tension rollers 66 is located on the actuari pulley 65. The tension roller 66 guides the belt 61 along the larger portion of the outer circumference of the actuari pulley 65. Thus, the belt may have a better grip on the actuari pulley 65. Thus, the actuari pulley 65 may rotate more precisely and / or accurately around the axis of rotation. The other of the tension rollers 66 guides the belt along the larger portion of the outer circumference of the fourth pulley 64 on the first member 31.

[0087] As best shown in Figure 4A, the inspection unit 1 is positionable relative to one or more support members 131 in a first operating position in which the inspection plane P extends perpendicular to the central plane U. As further shown in Figure 4B, the inspection unit 1 is further positionable relative to one or more support members 131 in a further operating position in which the inspection plane P extends obliquely to the central plane U. Preferably, the inspection unit 1 is movable between the first operating position and the further operating positions. More specifically, the drive assembly 3 is pivotable relative to the base 8 about a pivot axis K. In other words, the inspection plane P is pivotable about the pivot axis K. Preferably, as shown in Figures 2A to 2G, the pivot axis K extends in a first direction A. Alternatively, one or more support members 131 may be pivotable relative to the inspection plane P about a further pivot axis (not shown) that extends parallel to the inspection plane P. Preferably, the further pivot axis extends in the first direction A.

[0088] Next, a method for inspecting the internal surface 91 of a tire 9 is described. This method comprises scanning or imaging a splice G using an imaging device 2. In particular, this method comprises using the imaging device 2 to scan or image the splice G while moving the field of view W and / or laser beam L of the imaging device 2 along the splice G. The imaging device 2 may, for example, use a laser emitter and a camera to detect the height profile of the splice G.

[0089] As shown in Figure 1D, the tire 9 is provided in the inspection unit 1 by a transport device 13. The tire 9 is supported on one or more support members 131 in a support position. The method may include the step of oriented and / or positioning the tire 9 such that the splice G is in a predetermined inspection position, for example, a predetermined inspection position relative to the inspection unit 1, or substantially in that inspection position. This step may include, for example, tracking the location of the splice G in the circumferential direction C of the tire 9 on the tire construction drum 11, transport ring 14, and / or transport device 13. Alternatively, a marking indication of the location of the splice G in the circumferential direction C of the tire 9 may be applied to the tire 9. In the embodiment shown in Figure 2A, the splice G is located on or near the bottom of the tire 9 in a predetermined orientation.

[0090] Figure 2A shows the initial state of the inspection unit 1. The tire 9 is transported to the inspection unit 1 by the transport device 13. In other words, the tire 9 is transported toward and / or toward a support position. The tire 9 is suspended on one or more support members 131 in a vertical or substantially vertical orientation. The inspection unit 1 is in an idle or retracted state. Preferably, in the idle or retracted state, the inspection unit 1 is capable of transporting the tire toward and / or beyond the inspection station in the transport direction T.

[0091] As shown in Figure 2B, the imaging device 2 is moved through the opening 90 of the tire 9 to a first inspection position S1 within the internal volume V of the tire 9. The first inspection position S1 is located on the inspection plane P. The imaging device 2 is rotated around the axis of rotation R by a first inspection angle H1. In particular, the field of view W of the imaging device 2 is rotated around the axis of rotation R by the first inspection angle H1. In the illustrated embodiment, the first inspection angle H1 is defined as the relative angle between the field of view W and the horizontal axis. Alternatively, the first inspection angle H1 may relate to, for example, the vertical axis, a reference plane on the second member 32, or the central axis X of the tire 9. Preferably, at the first inspection angle H1, the field of view W extends perpendicular or substantially perpendicular to the internal surface 91 of the tire 9.

[0092] As shown in Figure 2C, the imaging device 2 scans a first inspection path T1 along the inner surface 91 of the tire 9. In particular, the field of view W of the imaging device 2 is moved along the first inspection path T1 while scanning the inner surface 91 of the tire 9.

[0093] The imaging device 2 is moved from a first inspection position S1 to a second inspection position S2. In the case of the first inspection path T1, the first inspection position S1 is the initial inspection position, and the second inspection position S2 is a consecutive inspection position. The second inspection position S2 is located on the inspection plane P. In particular, the imaging device 2 is displaced from the first inspection position S1 in both the first direction A and the second direction B. Preferably, the imaging device 2 is moved linearly, i.e., in a straight line, from the first inspection position S1 to the second inspection position S2.

[0094] As further shown in Figure 2C, the field of view W of the imaging device 2 is rotated around the axis of rotation R from a first inspection angle H1 to a second inspection angle H2. Preferably, the field of view W of the imaging device 2 is rotated from the first inspection angle H1 to the second inspection angle H2 while the imaging device is moved from a first inspection position S1 to a second inspection position S2. More preferably, the field of view W is gradually rotated from the first inspection angle H1 to the second inspection angle H2 while the imaging device 2 is moved from the first inspection position S1. In other words, the rotation of the field of view W is proportional to the movement of the imaging device 2.

[0095] As shown in Figure 2D, the imaging device 2 is moved from a second inspection position S2 to a third inspection position S3 to scan a second inspection path T2 along the inner surface of the tire 9, and is rotated around the axis of rotation R from a second inspection angle H2 to a third inspection angle H3. Scanning the second inspection path T2 is performed in a similar manner to scanning the first inspection path T1. For the second inspection path T2, the second inspection position S2 is the initial inspection position, and the third inspection position S3 is a successor inspection position. Thus, the second inspection angle H2 is the initial inspection angle, and the third inspection angle H3 is a successor inspection angle. At the third inspection position S3, the imaging device 2 is at least partially located between the first side 93 and the second side 94 of the tire 9. In other words, the imaging device 2 is located below the opening in the tire 9 in the first direction A.

[0096] As further shown in Figures 2E to 2G, the imaging device 2 is then moved to the fourth inspection position S4, the fifth inspection position S5, and the sixth inspection position S6, respectively, to move the field of view W along the third inspection path T3, the fourth inspection path T4, and the fifth inspection path T5, and rotated to the associated fourth inspection angle H4, fifth inspection angle H5, and sixth inspection angle H6. Each of the inspection paths T1 to T5 may partially overlap. Preferably, each of the inspection paths T1 to T5 forms a continuous or consecutive inspection path.

[0097] An arbitrary discrete number N of predetermined inspection positions S1 to Sn and associated inspection angles H1 to Hn can be selected to inspect the inner surface 91 of the tire 9. Preferably, the number N of predetermined inspection positions S1 to Sn is between 3 and 20. More preferably, the number N of predetermined inspection positions S1 to Sn is between 5 and 15 inspection positions S1 to Sn, for example, 8 inspection positions S1 to Sn. Preferably, the number M of inspection paths T1 to Tm is equal to the number N of predetermined inspection points S1 to Sn minus 1.

[0098] As further shown in Figures 4A and 4B, the splice G on the inner surface 91 of the tire 9 extends obliquely with respect to the tire axis X. In other words, the splice G extends at an acute or obtuse angle with respect to the circumferential direction C of the tire 9.

[0099] As shown in Figure 4A, the inspection plane P extends parallel to or collinear with the tire axis X. Therefore, the inspection plane P extends at an acute or obtuse angle to the splice G. In other words, the field of view W of the imaging device 2 is not centered on the splice along the entire inspection path T.

[0100] As shown in Figure 4B, the method may further comprise the step of adapting the angular position of the inspection plane P with respect to the tire 9. In particular, the method may comprise adapting the angular position of the inspection plane P with respect to the tire 9 by rotating the drive assembly 3 around a pivot axis K. Preferably, the drive assembly 3 is rotated around the pivot axis K to an angular position in which the inspection plane P extends parallel or substantially parallel to at least a portion of the splice G. More preferably, the drive assembly 3 is rotated around the pivot axis K to an angular position in which at least a portion of the splice G extends in or substantially in the inspection plane P.

[0101] Alternatively, for example, as shown in Figure 4A, the angular position of the inspection plane P relative to the splice G may be set to a sufficiently small relative angle so that the splice G is within the field of view W of the imaging device 2 when the imaging device 2 is moved and / or rotated within the inspection plane P.

[0102] As further shown in Figures 2A to 2G, the inspection unit 1 further comprises a control unit 7 operationally connected to a drive assembly 3 for controlling the movement of the imaging device 2. In particular, the control unit 7 is configured to cause the inspection unit 1 to perform the methods described above. Preferably, the control unit 7 is further operationally connected to the imaging device 2. For example, the control unit 7 may be configured to use the imaging device 2 to scan the inner surface 91 of the tire 9 while moving the imaging device 2 between one or more inspection positions S1 to Sn and / or one or more inspection angles H1 to Hn. Preferably, the control unit 7 comprises a memory for storing one or more inspection positions S1 to Sn and one or more inspection angles H1 to Hn. The control unit 7 may be connected to an interface and / or input device (not shown) that can be used by an operator to input one or more inspection positions S1 to Sn and one or more inspection angles H1 to Hn into the memory of the control unit 7. The control unit 7 may be configured to store a fixed number N or a variable number N of inspection positions S1 to Sn and inspection angles H1 to Hn in its memory. Alternatively, one or more of the inspection positions S1 to Sn and one or more of the inspection angles H1 to Hn may be pre-programmed in the memory of the control unit 7.

[0103] Preferably, the control unit 7 has access to a database in which predetermined dimensional data related to the shape and / or dimensions of the tire 9 is stored. The control unit 7 may be configured to compare the configuration of the tire 9 stored in the database with the inspection positions S1~Sn and inspection angles H1~Hn in the memory of the control unit 7. Preferably, for each inspection path T1~Tm, the control unit 7 is configured to calculate the expected distance between the imaging device 2 and the inner surface 91 based on the dimensional data and the stored inspection positions S1~Sn and inspection angles H1~Hn. Thus, the control unit 7 may be configured to provide feedback to the operator regarding the suitability of the inspection positions S1~Sn and inspection angles H1~Hn stored in memory for use in, for example, a method for inspecting the inner surface 91 of the tire 9.

[0104] Preferably, the method according to the present invention further includes the step of calibrating the inspection unit 1 before inspecting a batch of tires 9 having the same configuration, for example, the same dimensions.

[0105] This method comprises measuring the distance between the imaging device 2 and the inner surface 91 of the tire 9 at each inspection position S1 to Sn, and checking whether the distance falls within a predetermined interval. The distance between the imaging device 2 and the inner surface 91 of the tire 9 may be determined separately for each inspection point S1 to Sn. Alternatively or additionally, the distance between the imaging device 2 and the inner surface 91 of the tire may be determined along at least a portion of each inspection path T1 to Tn. Preferably, the distance between the imaging device 2 and the inner surface 91 of the tire is determined for the entire length of each inspection path T1 to Tn. The predetermined interval for the distance between the imaging device 2 and the inner surface 91 of the tire 9 may be, for example, between 5 millimeters and 75 millimeters for each inspection position S1 to Sn. Preferably, the distance is between 20 millimeters and 60 millimeters for each inspection position S1 to Sn.

[0106] This method further comprises correcting the inspection positions S1~Sn and / or associated inspection angles H1~Hn when the respective distances between the imaging device 2 and the inner surface 91 of the tire 9 are not within a predetermined interval.

[0107] Preferably, the calibration step described above is performed once before inspecting multiple tires 9 or batches of tires 9 having the same configuration and / or dimensions. The calibration step can be pre-programmed in the control unit 7.

[0108] It should be understood that the above description is included to illustrate the operation of preferred embodiments and is not intended to limit the scope of the invention. From the above description, it will be apparent to those skilled in the art that many variations will further be included within the scope of the invention. [Explanation of symbols]

[0109] 1 Inspection Unit 2. Imaging devices 3. Drive Assembly 31 First member 32 Second member 4. First linear drive 41 Spindle drive 5. Second Linear Drive 51 First Pulley 52 Second Pulley 6 rotation drive 61 belt 63 Third pulley or driven pulley 64 The fourth pulley 65. Fifth pulley or working pulley 66 Tension Roller 7 Control Unit 8 Base 9 tires 90 aperture 91 Internal surface 92 External surface 93 First side 94 Second side 10 Tire Processing Assembly 11 Tire Construction Drum 12. Horizontal devices 121. Horizontal support 122 Horizontal Roller 13. Conveying devices 130 Guide Rail 131 Support Member 132 load cells 133 Carriage 134 Shield Elements 14 Transfer rings 15 Sticker Applicators 210 Alternative Tire Processing Assembly 212 Alternative lying devices 221 Horizontal support 222 Horizontal Roller A First direction B. Second direction C Circumferential direction D Splice direction E Horizontal axis F View direction G Splice H1~Hn Inspection angle K pivot axis L laser beam M: Number of testing routes N: Number of inspection locations P Inspection Plane R rotation axis S1~Sn Examination Location T1~Tm Testing Route U midplane V internal volume W field of view X Tire Axle Y transfer shaft Z-direction of transport The invention described in the original claims of this application is listed below. [1] A method for inspecting the inner surface of a tire having a splice extending along the inner surface in a splice direction perpendicular to the circumferential direction of the tire, comprising scanning the splice with an imaging device while moving the field of view of the imaging device along the splice. [2] The method according to [1], further comprising scanning the splice with the imaging device while moving the field of view of the imaging device along several separate inspection paths along the inner surface of the tire. [3] Moving the field of view of the imaging device along each of the several separate examination paths is a) Moving the imaging device to a continuous examination position from the initial examination position, and / or b) Rotating the field of view of the imaging device to a continuous inspection angle from the initial inspection angle around a rotation axis extending perpendicular to the splice direction. The method according to [2], comprising: [4] The method according to [3], wherein the inspection route among the several separate inspection routes is a continuous inspection route. [5] The method according to [4], wherein the consecutive inspection positions of the first inspection path are the first inspection positions of the consecutive inspection path, and / or the consecutive inspection angles of the first inspection path are the first inspection angles of the consecutive inspection path. [6] The method according to [3], [4] or [5], wherein in step a), the imaging device is moved linearly from the first inspection position to the consecutive inspection positions. [7] The method according to any one of [3] to [6], wherein steps a) and b) are performed simultaneously to move the field of view of the imaging device along each of the several separate examination paths. [8] The method according to [7], wherein the viewing direction of the field of view is gradually rotated from the initial inspection angle to the successive inspection angles while the imaging device is moved from the initial inspection position to the successive inspection positions. [9] The method according to any one of [3] to [8], wherein the first inspection position and subsequent inspection positions for each of the inspection paths among several separate inspection paths are located in a common inspection plane.

[10] The method according to [9], wherein the axis of rotation extends perpendicular to the inspection plane.

[11] The method according to [9] or

[10] , further comprising selecting a first inspection position and one or more further inspection positions such that at least a portion of the splice extends parallel or substantially parallel to the inspection plane.

[12] The method according to [9],

[10] or

[11] , further comprising selecting a first inspection position and one or more further inspection positions such that at least a portion of the splice extends in the inspection plane.

[13] The method further comprises calibrating one of several separate inspection paths before scanning the splice, wherein the calibration is - A step of moving the field of view of the imaging device along each of the several separate inspection paths, - For each of the inspection paths, the step of determining the mutual distance between the imaging device and the inner surface of the tire, - A step of adjusting each of the first and consecutive inspection positions and / or each of the first and consecutive inspection angles when the mutual distance is outside a predetermined range. The method according to any one of [3] to

[12] , comprising:

[14] The aforementioned calibration is - A step of determining the mutual distance between the inspection plane and the splice, - When the relative distance is outside a predetermined range, the step of rotating the inspection plane around the pivot axis and The method described in

[13] further comprises the following:

[15] The method according to any one of [2] to

[14] , wherein the separate inspection pathways are in the range of 1 to 19, preferably in the range of 4 to 14, and more preferably in the range of 7 to 9.

[16] The method according to any one of [1] to

[15] , wherein the movement of the imaging device along the splice is computer-controlled and / or automated.

[17] The method according to any one of [1] to

[16] , further comprising supporting the tire in an upright orientation while inspecting the internal surface.

[18] An inspection unit for inspecting the inner surface of a tire according to a step of the method described in any one of [1] to

[17] , comprising: a base; an imaging device; and a drive assembly for driving the movement of the imaging device relative to the base in an inspection plane and for driving the rotation of the imaging device about a rotation axis perpendicular to the inspection plane, further comprising a control unit operationally connected to the drive assembly for controlling the movement of the imaging device relative to the base in the inspection plane and for controlling the rotation of the imaging device about the rotation axis, wherein the control unit is configured to control the drive assembly to position the imaging device at a number of distinct predetermined inspection positions in the inspection plane and at associated inspection angles about the rotation axis, Inspection unit.

[19] The inspection unit according to

[18] , wherein the control unit is further operationally connected to the imaging device, wherein the control unit is configured to use the imaging device to scan the inner surface of the tire while moving the imaging device between the predetermined inspection positions and / or between the associated inspection angles.

[20] The inspection unit according to

[18] or

[19] , wherein the control unit is configured to control the drive assembly to gradually rotate the imaging device around the rotation axis to a series of inspection angles from an initial inspection angle while moving the imaging device from an initial inspection position to a series of inspection positions.

[21] The inspection unit according to

[20] , wherein the initial inspection angle and the subsequent inspection angles are the same for the associated initial inspection position and a subsequent inspection position different from the said initial inspection position.

[22] The inspection unit according to

[20] , wherein the initial inspection position and the subsequent inspection position are the same with respect to the associated initial inspection angle and the subsequent inspection angle which is different from the said initial inspection angle.

[23] The inspection unit according to any one of

[18] to

[22] , wherein the number of the separate several predetermined inspection positions and associated inspection angles is in the range of 2 to 20, preferably in the range of 5 to 15, and more preferably in the range of 8 to 10.

[24] The inspection unit according to any one of

[18] to

[23] , wherein the inspection unit is configured to measure the distance between the imaging device and the inner surface of the tire.

[25] The inspection unit according to any one of

[18] to

[24] , wherein the imaging device is movable along the inspection plane with respect to the base in a first direction and a second direction perpendicular or perpendicular to the first direction.

[26] The inspection unit according to

[25] , wherein the drive assembly is rotatable relative to the base about a pivot axis extending in the first direction to rotate the inspection plane relative to the base.

[27] The inspection unit according to

[25] or

[26] , wherein the first direction is vertical.

[28] The inspection unit according to

[25] ,

[26] or

[27] , wherein the drive assembly comprises a first member movable relative to the base and a second member movable relative to the first member, wherein the imaging device is rotatably mounted on the second member for rotation around the rotation axis.

[29] The inspection unit according to

[28] , further comprising a drive assembly for driving the movement of the first member relative to the base in a first direction, and a second linear drive for driving the movement of the second member relative to the first member in a second direction.

[30] The inspection unit according to

[28] or

[29] , wherein the drive assembly further comprises a rotation drive for driving the rotation of the imaging device around the rotation axis.

[31] The rotational drive is a belt drive comprising a plurality of pulleys and a belt guided along the plurality of pulleys, wherein the plurality of pulleys comprises an actuating pulley that rotates and is coupled to the imaging device, the inspection unit according to

[30] .

[32] The inspection unit according to

[31] , wherein the operating pulley is rotatable around the rotating shaft.

[33] The inspection unit according to

[31] or

[32] , wherein the plurality of pulleys comprises driven pulleys for driving the belt, the driven pulleys being located on the first member or the base.

[34] The inspection unit according to

[31] ,

[32] or

[33] , wherein the belt is a toothed belt.

[35] The inspection unit according to any one of

[18] to

[34] , wherein the imaging device has a field of view directed in the direction of the view, wherein the field of view is between 25 degrees and 45 degrees, preferably between 30 degrees and 40 degrees, in a direction perpendicular to the inspection plane.

[36] The inspection unit according to any one of

[18] to

[35] , wherein the imaging device comprises a laser emitter for projecting a laser beam onto the inner surface of the tire and a camera for capturing an image of the laser beam.

[37] The inspection unit according to

[36] , wherein the laser emitter is configured to project the laser beam onto the inner surface of the tire such that the laser beam extends perpendicular to the inspection plane.

[38] A processing assembly for processing a tire, comprising an inspection unit according to any one of

[18] to

[37] , further comprising one or more support members for supporting the tire at the support position relative to the inspection unit, where the inspection plane intersects the tire when the tire is in a support position.

[39] The processing assembly according to

[38] , wherein the inspection unit is positionable with respect to one or more support members in an operating position in which the inspection plane extends perpendicularly to or obliquely to the central plane of the tire when the tire is in the support position.

[40] The inspection unit is rotatable around one or more support members to adjust the angle between the inspection plane and the central plane, as described in

[39] .

[41] The processing assembly according to

[38] ,

[39] or

[40] , wherein the tire is configured in an upright orientation at the support position.

[42] The processing assembly further comprises a transport device for transporting the tire along a transport path, wherein the transport device comprises one or more support members for supporting the tire, wherein the inspection unit is configured along the transport path, the processing assembly according to any one of

[38] to

[41] .

[43] The processing assembly according to

[42] , wherein the inspection unit is configured to inspect the tire on the transport device without removing the tire from the transport device. A computer program product comprising instructions for causing a test unit as described in any one of paragraphs

[18] to

[37] , or a processing assembly as described in any one of paragraphs

[39] to

[43] , to perform the method described in any one of paragraphs [1] to

[17] .

Claims

1. A method for inspecting the inner surface of a tire having a splice extending along the inner surface in a splice direction perpendicular to the circumferential direction of the tire, the method comprising scanning the splice while the field of view of the imaging device moves along the splice.

2. The method according to claim 1, wherein the imaging device scans the splice while the field of view of the imaging device moves along several separate inspection paths along the inner surface of the tire.

3. The field of view of the imaging device moves along each of the aforementioned separate examination paths. a) The imaging device moves from the initial inspection position to a continuous inspection position, and / or b) The field of view of the imaging device rotates around a rotation axis extending perpendicular to the splice direction to a continuous inspection angle from the initial inspection angle. The method according to claim 2, comprising:

4. The method according to claim 3, wherein the inspection path among the aforementioned separate inspection paths is a continuous inspection path.

5. The method according to claim 4, wherein the consecutive inspection positions of the first inspection path are the first inspection positions of the consecutive inspection path, and / or the consecutive inspection angles of the first inspection path are the first inspection angles of the consecutive inspection path.

6. The method according to claim 3, wherein in step a), the imaging device is linearly moved from the first inspection position to the consecutive inspection positions.

7. The method according to claim 3, wherein steps a) and b) are performed simultaneously for the field of view of the imaging device to move along each of the several separate inspection paths.

8. The method according to claim 7, wherein the viewing direction of the field of view is gradually rotated from the initial inspection angle to the consecutive inspection angles while the imaging device is moved from the initial inspection position to the consecutive inspection positions.

9. The method according to claim 3, wherein the first inspection position and subsequent inspection positions for each of the inspection paths among the several separate inspection paths are located in a common inspection plane.

10. The method according to claim 9, wherein the rotation axis extends perpendicular to the inspection plane.

11. The method according to claim 9, further comprising selecting a first inspection position and one or more further inspection positions such that at least a portion of the splice extends parallel or substantially parallel to the inspection plane.

12. The method according to claim 9, comprising selecting a first inspection position and one or more further inspection positions such that at least a portion of the splice extends in the inspection plane.

13. The method further comprises calibrating one of several separate inspection paths before scanning the splice, wherein the calibration is - A step in which the field of view of the imaging device moves along each of the several separate inspection paths, - For each of the inspection paths, the step of determining the mutual distance between the imaging device and the inner surface of the tire, - A step of adjusting each of the first and subsequent inspection positions and / or each of the first and subsequent inspection angles when the mutual distance is outside a predetermined range. The method according to claim 3, comprising:

14. The first inspection position and subsequent inspection positions for each of the inspection paths among the aforementioned separate inspection paths are located on a common inspection plane. The aforementioned calibration is, - A step of determining the mutual distance between the inspection plane and the splice, - When the relative distance is outside a predetermined range, the step of rotating the inspection plane around the pivot axis and The method according to claim 13, further comprising:

15. The method according to claim 2, wherein the aforementioned separate inspection pathways are in the range of 1 to 19.

16. The method according to claim 1, wherein the movement of the imaging device along the splice is computer-controlled and / or automated.

17. The method according to claim 1, further comprising supporting the tire in an upright position while inspecting the internal surface.

18. An inspection unit for inspecting the inner surface of a tire according to a step of the method of claim 1, comprising: a base; an imaging device; and a drive assembly for driving the movement of the imaging device relative to the base in an inspection plane and for driving the rotation of the imaging device about a rotation axis perpendicular to the inspection plane, further comprising a control unit operationally connected to the drive assembly for controlling the movement of the imaging device relative to the base in the inspection plane and controlling the rotation of the imaging device about the rotation axis, wherein the control unit is configured to control the drive assembly to position the imaging device at a number of distinct predetermined inspection positions in the inspection plane and at associated inspection angles about the rotation axis. Inspection unit.

19. The inspection unit according to claim 18, wherein the control unit is further operationally connected to the imaging device, wherein the control unit is configured to use the imaging device to scan the inner surface of the tire while moving the imaging device between the predetermined inspection positions and / or between the associated inspection angles.

20. The inspection unit according to claim 18, wherein the control unit is configured to control the drive assembly to gradually rotate the imaging device around the rotation axis to a series of inspection angles from an initial inspection angle while moving the imaging device from an initial inspection position to a series of inspection positions.

21. The inspection unit according to claim 20, wherein the initial inspection angle and the subsequent inspection angles are the same with respect to the associated initial inspection position and the subsequent inspection position which is different from the initial inspection position.

22. The inspection unit according to claim 20, wherein the initial inspection position and the subsequent inspection position are the same with respect to the associated initial inspection angle and the subsequent inspection angle which is different from the initial inspection angle.

23. The inspection unit according to claim 18, wherein the aforementioned several separate predetermined inspection positions and associated inspection angles are in the range of 2 to 20.

24. The inspection unit according to claim 18, wherein the inspection unit is configured to measure the distance between the imaging device and the inner surface of the tire.

25. The inspection unit according to claim 18, wherein the imaging device is movable with respect to the base along the inspection plane in a first direction and a second direction perpendicular or perpendicular to the first direction.

26. The inspection unit according to claim 25, wherein the drive assembly is pivotable relative to the base about a pivot axis extending in the first direction for pivoting the inspection plane relative to the base.

27. The drive assembly comprises a first member movable relative to the base and a second member movable relative to the first member, wherein the imaging device is rotatably mounted on the second member for rotation around the rotation axis. The inspection unit according to claim 25, wherein the drive assembly further comprises a rotation drive for driving the rotation of the imaging device around the rotation axis.

28. The inspection unit according to claim 27, wherein the drive assembly further comprises a first linear drive for driving the movement of the first member relative to the base in the first direction, and a second linear drive for driving the movement of the second member relative to the first member in the second direction.

29. The inspection unit according to claim 27, wherein the rotational drive is a belt drive comprising a plurality of pulleys and a belt guided along the plurality of pulleys, wherein the plurality of pulleys comprises an actuating pulley that rotates and is coupled to the imaging device.

30. The inspection unit according to claim 29, wherein the operating pulley is rotatable around the rotating shaft.

31. The inspection unit according to claim 29, wherein the plurality of pulleys include driven pulleys for driving the belt, and the driven pulleys are located on the first member or the base.

32. The inspection unit according to claim 18, wherein the imaging device has a field of view directed in the direction of the view, and the field of view is between 25 degrees and 45 degrees in a direction perpendicular to the inspection plane.

33. The inspection unit according to claim 18, wherein the imaging device comprises a laser emitter for projecting a laser beam onto the inner surface of the tire and a camera for capturing an image of the laser beam.

34. The inspection unit according to claim 33, wherein the laser emitter is configured to project the laser beam onto the inner surface of the tire such that the laser beam extends perpendicular to the inspection plane.

35. A processing assembly for processing a tire, comprising the inspection unit according to claim 18, further comprising one or more support members for supporting the tire at the support position relative to the inspection unit where the inspection plane intersects the tire when the tire is in a support position.

36. The processing assembly according to claim 35, wherein the inspection unit is positionable with respect to one or more support members in an operating position in which the inspection plane extends perpendicularly to or obliquely to the central plane of the tire when the tire is in the support position.

37. The processing assembly according to claim 35, further comprising a transport device for transporting the tire along a transport path, wherein the transport device comprises one or more support members for supporting the tire, wherein the inspection unit is configured along the transport path.

38. The processing assembly according to claim 37, wherein the inspection unit is configured to inspect the tire on the transport device without removing the tire from the transport device.

39. A computer program product comprising instructions for causing the inspection unit according to claim 18, or the processing assembly according to claim 35, to carry out the method according to claim 1.

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