CN111323244A - Metal wire detection system and metal wire detection method for tire - Google Patents
Metal wire detection system and metal wire detection method for tire Download PDFInfo
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- CN111323244A CN111323244A CN201911029212.1A CN201911029212A CN111323244A CN 111323244 A CN111323244 A CN 111323244A CN 201911029212 A CN201911029212 A CN 201911029212A CN 111323244 A CN111323244 A CN 111323244A
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- 238000001514 detection method Methods 0.000 title claims abstract description 62
- 239000002184 metal Substances 0.000 title claims description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 169
- 238000005259 measurement Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 2
- 230000005856 abnormality Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 239000011324 bead Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object
Abstract
The invention provides a wire detecting system and a wire detecting method for a tire, which can move a sensor head to an appropriate measuring position according to the shape of the tire. A wire detecting system for detecting a wire embedded in a tire from the outside of the tire, comprising: a rotating device that rotates the tire; a detection device having a sensor head disposed at a predetermined measurement position near a surface of the tire rotated by the rotation device; a moving device that moves the sensor head; and a control device for controlling the operation of the moving device so that the sensor head moves to a measurement position corresponding to the shape of the tire, the moving device including: at least one of a radial movement mechanism that moves the sensor head in the radial direction of the tire and an axial movement mechanism that moves the sensor head in the axial direction of the tire; and an angle adjustment mechanism that adjusts an angle of the sensor head with respect to the surface of the tire.
Description
Technical Field
The present invention relates to a wire detecting system and a wire detecting method for a tire.
Background
A pneumatic tire used in a vehicle includes a tread that contacts a ground surface, a sidewall that extends radially inward and is connected to both sides in the width direction of the tread, a bead that is disposed radially inward of the sidewall, and the like. Further, a carcass, which is a framework of the tire, is provided inside the tire, and a belt for improving the rigidity of the tread is provided on the tread-side surface of the carcass. The belt has a plurality of belt cords made of metal.
In the pneumatic tire as described above, if the arrangement of the belt cords is disturbed or the belt itself is shifted to the left and right from the center in the width direction of the tire, the tire performance may be degraded. Thus, the tire in such a situation is detected and removed during the manufacturing process.
Patent document 1 discloses a wire detection device capable of checking the arrangement and disorder of belt cords. The wire detecting device includes a sensor head having a coil, and the sensor head is brought close to both ends in the width direction of the tread of the tire to detect the distance from the sensor head to the steel cord, thereby determining the presence or absence of an abnormality.
Patent document 1: japanese laid-open patent publication No. 2007-7915
The size and shape of the pneumatic tire vary depending on the type of vehicle (use of the tire) mounted on a passenger car, a two-wheeled motor vehicle, a truck, a bus, or the like. Even in tires mounted on the same type of vehicle, the shape differs depending on parameters such as the width and height. The wire detecting device described in patent document 1 can manually adjust the angle of the sensor head or the distance from the tire in accordance with the position of the tire, but it is difficult to adjust the position of the sensor head in accordance with the shape of the tire which differs depending on the application of the tire, various parameters, and the like.
Disclosure of Invention
An object of the present invention is to provide a wire detection system and a wire detection method that can move a sensor head to an appropriate measurement position according to the shape of a tire.
(1) The wire detecting system of the present invention is a wire detecting system for detecting a wire embedded in a tire from outside the tire, and includes:
a rotating device that rotates the tire;
a detection device having a sensor head disposed at a predetermined measurement position near a surface of the tire rotated by the rotation device;
a moving device that moves the sensor head; and
a control device that controls an operation of the moving device so that the sensor head moves to the measurement position corresponding to a shape of the tire,
the mobile device has:
at least one of a radial movement mechanism that moves the sensor head in a radial direction of the tire and an axial movement mechanism that moves the sensor head in an axial direction of the tire; and
an angle adjustment mechanism that adjusts an angle of the sensor head with respect to a surface of the tire.
In the wire detecting system having the above-described configuration, the controller controls the operation of the moving device so that the sensor head moves to the measurement position corresponding to the shape of the tire, and therefore, the sensor head can be moved to an appropriate measurement position. Further, the sensor head can be moved to an appropriate radial position corresponding to the height dimension of the tire by the radial moving mechanism, and the sensor head can be moved to an appropriate position corresponding to the width dimension of the tire by the axial moving mechanism. Further, the angle of the sensor head disposed near the surface of the tire by the radial movement mechanism and/or the axial movement mechanism can be adjusted by the angle adjustment mechanism in accordance with the shape of the surface of the tire.
(2) Preferably, the sensor head is attached to the angle adjustment mechanism.
According to this configuration, since the angle of the sensor head can be directly adjusted by the angle adjusting mechanism, the angle can be adjusted more accurately in accordance with the surface shape of the tire.
(3) Preferably, the angle adjustment mechanism is attached to either one of the radial movement mechanism and the axial movement mechanism.
According to this configuration, the sensor head and the angle adjustment mechanism can be positioned at an appropriate radial position or axial position with respect to the tire by either the radial movement mechanism or the axial movement mechanism.
(4) Preferably, the radial movement mechanism is composed of a main movement mechanism in which a maximum movement distance of the sensor head is large and a sub-movement mechanism in which the maximum movement distance is small,
the axial moving mechanism is arranged on the main moving mechanism,
the auxiliary moving mechanism is arranged on the axial moving mechanism,
the angle adjusting mechanism is mounted on the auxiliary moving mechanism.
According to this configuration, the axial movement mechanism, the sub-movement mechanism, the angle adjustment mechanism, and the sensor head are moved greatly in the radial direction by the main movement mechanism of the radial movement mechanism, so that the sensor head can be brought quickly close to the tire, and the sensor head is moved slightly in the radial direction by the sub-movement mechanism, so that the sensor head can be easily positioned at a more appropriate radial position with respect to the tire.
(5) Preferably, the angle adjustment mechanism includes: 2 cylinders arranged in parallel with each other; and a mounting member to which the sensor head is mounted and which is coupled to piston rods of the two cylinders.
According to this configuration, the angle of the sensor head can be adjusted via the attachment member by individually extending and contracting each of the 2 cylinders. Further, when the angle of the sensor head is adjusted, the radial position or the axial position of the sensor head may vary and the distance from the surface of the tire may vary, but the radial position or the axial position of the sensor head can be adjusted while maintaining the angle by extending and contracting 2 cylinders in the same manner.
(6) Preferably, the wire detecting system further includes an information acquiring device that acquires information related to a shape of the tire,
the control device controls the operation of the mobile device based on the information input from the information acquisition device.
With this configuration, the sensor head can be moved to an appropriate measurement position according to the shape of the tire.
(7) Preferably, the wire detecting system further has a rotation detector that detects a rotation angle of the tire,
the control device performs processing for associating the detection data of the detection device with the angle data of the rotation detector.
With this configuration, the state of the wire of the tire and the rotation angle of the tire can be grasped at the same time, and, for example, when there is an abnormality in the arrangement of the wire, a specific circumferential position thereof can be specified.
(8) The wire detecting method according to the present invention is a wire detecting method for detecting a wire embedded in a tire from outside the tire, and includes the steps of:
obtaining information relating to the shape of the tire;
rotating the tire;
moving a sensor head of a detection device to a predetermined measurement position near a surface of the tire based on the obtained shape of the tire; and
and detecting the metal wire by the detection device.
With this method, the sensor head can be moved to an appropriate measurement position according to the shape of the tire.
According to the wire detecting system of the present invention, the sensor head can be moved to an appropriate measurement position according to the shape of the tire.
Drawings
Fig. 1 is a partial cross-sectional view of a tire as a detection target of a wire detection system according to an embodiment of the present invention.
Fig. 2 is a schematic front view of the wire detecting system.
Fig. 3 is a front view showing the angle adjustment mechanism.
Fig. 4 (a) is a sectional view a-a of fig. 2, and fig. 4 (b) is a sectional view C-C of fig. 2.
Fig. 5 is a schematic front view for explaining the operation of the mobile device.
Fig. 6 is a schematic front view for explaining the operation of the mobile device.
Fig. 7 is a flowchart showing the processing steps of the control device.
Fig. 8 is a front view showing a modification of the angle adjustment mechanism.
Description of the reference symbols
1: a tire; 10: a wire detection system; 11: a rotating device; 12: a detection device; 13: a mobile device; 14: a control device; 15: an information acquisition device; 27: a rotation detector; 31: a sensor head; 35: an angle adjusting mechanism; 36: a radial movement mechanism; 36A: a main moving mechanism; 36B: a sub-moving mechanism; 37: an axial moving mechanism; 41: a mounting member; 41 a: an installation part; 42: an electric cylinder; 42 b: a piston rod; x: axial direction; y: and radial direction.
Detailed Description
Hereinafter, embodiments of the present invention will be described.
[ Structure of tire ]
Fig. 1 is a partial cross-sectional view of a tire as a detection target of a wire detection system according to an embodiment of the present invention.
In fig. 1, the left-right direction is an axial direction (width direction) X of the tire 1, and the up-down direction is a radial direction Y of the tire 1. The direction perpendicular to the paper of fig. 1 is the circumferential direction of the tire 1. In fig. 1, a chain line CL indicates an equatorial plane of the tire 1.
The tire 1 is a pneumatic tire, and is used by being mounted on a passenger vehicle, for example. The tire 1 has a tread 2, sidewalls 3, and beads 4.
The tread 2 is disposed on the outer periphery of the tire 1. The outer peripheral surface of the tread 2 is a tread surface 2a that contacts the road surface. The tread 2 is composed of a crosslinked rubber.
The sidewalls 3 extend radially inward from both sides in the width direction of the tread 2. The sidewalls 3 are made of crosslinked rubber. Various displays are made on the outer surface of the sidewall 3. For example, an imprint showing the name, size (width dimension, rim diameter, aspect ratio, and the like), manufacturer name, and the like of the tire is provided on the outer surface of the sidewall 3.
The bead 4 is disposed radially inward of the sidewall 3. The bead 4 has a core 4a and an apex 4 b. The core 4a comprises a circumferentially extending steel wire. The core 4a has a rectangular cross section. The apex 4b is located radially outward of the core 4 a. The apex 4b is made of a crosslinked rubber.
Inside the tire 1, a carcass 5, a belt 6, a crown band 7, and an inner liner 8 are provided.
The carcass 5 is located inside the tread 2, sidewalls 3 and beads 4. The carcass 5 comprises at least 1 carcass ply. In this tire 1, the ends of the carcass ply pass through the radially inner side from the widthwise inner side of the core 4a and turn back to the radially outer side on the widthwise outer side of the core 4 a.
The belt 6 is laminated on the carcass 5 radially inside the tread 2. The belt 6 of the tire 1 shown in fig. 1 is constituted by 2 belt plies 6 a. Each belt ply 6a includes a plurality of belt cords arranged in parallel. Each belt cord is inclined with respect to the equatorial plane. The belt cords form an angle of 10 DEG to 35 DEG with respect to the equatorial plane. The belt cord is made of metal such as steel.
The crown band 7 is located radially between the tread 2 and the belt 6. The crown band 7 covers the whole belt 6. The crown band 7 has a seamless construction.
The inner liner 8 is located inside the carcass 5. The inner liner 8 constitutes the inner surface of the tire 1. The liner 8 is made of a crosslinked rubber. The inner liner 8 maintains the inner pressure of the tire 1.
[ Structure of Metal wire detection System 10 ]
Fig. 2 is a schematic front view of the wire detecting system.
The wire detecting system 10 of the present embodiment detects the end of a belt cord constituting the belt 6. As shown in fig. 2, the wire detecting system 10 includes a rotating device 11, a detecting device 12, a moving device 13, a control device 14, an information acquiring device 15, and an output device 16. In fig. 2, the tire 1 is arranged such that the axial direction X is directed vertically and the radial direction Y is directed horizontally. Therefore, in the following description, the vertical direction is sometimes referred to as an axial direction X, and the horizontal direction is sometimes referred to as a radial direction Y.
(Structure of the rotating device 11)
The rotating device 11 supports and rotates the tire 1. In the present embodiment, a tire testing machine for performing uniformity inspection of the tire 1 is used as the rotating device 11. The tire testing machine 11 includes a tire support portion 21, a rotation detector 27, and a measuring portion 23. The tire 1 is supported by the tire support portion 21 in a horizontal posture with the axis thereof directed vertically. The tire support portion 21 has a rim member 24 assembled to the tire 1. The tire 1 assembled to the rim member 24 is filled with air.
Further, the tire support portion 21 includes: an upper rotary shaft 25a coupled to an upper portion of the rim member 24; and a lower rotary shaft 25b coupled to a lower portion of the rim member 24.
The rotation detector 27 detects the rotation angle of the tire 1 supported by the tire support portion 21. The rotation detector 27 is provided on, for example, the upper rotation shaft 25a or the lower rotation shaft 25 b. As the rotation detector 27, for example, a rotary encoder is used.
The measuring unit 23 has a rotary drum 26. The rotary drum 26 is supported to be rotatable about an axis in the vertical direction. The rotary drum 26 is provided to be movable in the horizontal direction, and is in contact with the outer peripheral surface of the tire 1 held on each tire support portion 21. The measuring unit 23 includes a driving unit (not shown) for rotationally driving the rotary drum 26. The tire 1 in contact with the rotating drum 26 rotates with the rotation of the rotating drum 26.
The measuring unit 23 includes a measuring device (not shown) such as a load cell that measures a force in a predetermined direction applied from the tire 1 to the rotary drum 26.
The tire testing machine 11 is not limited to the configuration for rotationally driving the rotary drum 26 of the measuring section 23, and may be configured to rotationally drive the tire 1. In this case, for example, the upper rotary shaft 25a or the lower rotary shaft 25b of the tire support portion 21 can be rotationally driven by a drive motor or the like.
(Structure of detection device 12)
The detection device 12 is a non-contact sensor capable of detecting metal. The detection device 12 detects an end of a belt cord of the tire 1 supported and rotated by the tire testing machine 11. As the detection device 12, for example, an eddy current type displacement sensor is used. The detection device 12 has a sensor unit 32 and 2 sensor heads 31.
The sensor heads 31 are provided 2 above and below corresponding to both ends in the width direction of the tread 2 of the tire 1 disposed horizontally. The sensor head 31 has a coil that generates a magnetic field by a high-frequency current. The sensor unit 32 has the following circuits: a transmission circuit that causes a high-frequency current to flow in the coil of the sensor head 31; a detection circuit that detects a change in impedance of the coil as a change in voltage; and an output circuit that outputs a change in voltage.
When the metal approaches the coil of the sensor head 31, an eddy current is generated in the metal by a magnetic field generated by the coil. When the distance from the coil to the metal changes, the magnitude of the eddy current also changes substantially in proportion to the change, and the impedance of the coil including the metal changes. The detection circuit detects a change in transmission amplitude (amplitude of voltage) caused by the change in impedance, and the output circuit outputs the change in amplitude of voltage as detection data. The output of the output circuit is input to a control device 14 described later.
The detection device 12 is not limited to the eddy current type displacement sensor described above, and may be another type of sensor such as a capacitance sensor.
(Structure of the moving device 13)
The moving device 13 positions each of the 2 sensor heads 31 of the detection device 12 at a predetermined measurement position near the surface of the tire 1. The detection device 12 of the present embodiment is for detecting both ends of a belt cord of the belt 6, and the sensor head 31 is positioned with a gap t (see fig. 1) in the vicinity of the surface (sidewall surface B) of both ends in the width direction of the tread 2. Further, since the sidewall surface B is inclined with respect to the axial direction X and the radial direction Y, the sensor head 31 is also arranged to be inclined along the sidewall surface B.
The moving device 13 has an angle adjusting mechanism 35, a radial moving mechanism 36, and an axial moving mechanism 37.
The angle adjusting mechanisms 35 are provided in a pair of upper and lower. The upper and lower angle adjusting mechanisms 35 are formed to be vertically symmetrical to each other. Each angle adjustment mechanism 35 includes a mounting member 41, an actuator 42, and a support frame 43.
The mounting member 41 supports the sensor head 31 and couples the sensor head 31 and the actuator 42. The mounting member 41 includes: a mounting portion 41a arranged obliquely with respect to the radial direction Y and the axial direction X; and a coupling portion 41b arranged substantially along the radial direction Y. The sensor head 31 is attached to the attachment portion 41 a. The actuator 42 is coupled to the coupling portion 41 b.
The actuator 42 is constituted by an electric cylinder, for example. The electric cylinder 42 expands and contracts by being supplied with electric power. As shown in fig. 3, the electric cylinder 42 includes: the cylinder main body 42 a; and a piston rod 42b provided movably in the longitudinal direction with respect to the cylinder main body 42 a.
The angle adjustment mechanism 35 of the present embodiment has 2 electric cylinders 42. The 2 electric cylinders 42 are arranged in parallel in the radial direction Y. The 2 electric cylinders 42 are disposed in parallel with each other in the axial direction X, and each extends and contracts in the axial direction X. In addition, the 2 electric cylinders 42 extend and contract independently. The cylinder body 42a of the electric cylinder 42 is supported by a support frame 43. The distal end of the piston rod 42b of the electric cylinder 42 is rotatably coupled to the coupling portion 41b of the mounting member 41.
Fig. 3 is a front view showing the angle adjustment mechanism. In particular, fig. 3 shows a state in which the sensor heads 31 of the detection devices 12 are arranged along the sidewall surfaces B of tires 1 of different shapes.
The sensor head 31 of the detection device 12 is adjusted in angle by the expansion and contraction of 2 electric cylinders 42. Fig. 3 (a) shows a state in which 2 electric cylinders 42 are extended and contracted by substantially the same amount. Fig. 3 (b) shows a state in which one electric cylinder 42 disposed on the tire 1 side is extended more largely than the other electric cylinder 42. Fig. 3 (c) shows a state in which the other electric cylinder 42 is extended more largely than the one electric cylinder 42.
As shown in fig. 3 (a) to (c), the angle adjustment mechanism 35 can appropriately set the angle of the sensor head 31B in accordance with the inclination of the sidewall surface B of the tire 1 by independently extending and contracting each of the 2 electric cylinders 42.
Further, by extending and contracting the 2 electric cylinders 42 in the same direction by the same amount, the distance in the axial direction X can be adjusted while maintaining the angle of the sensor head 31. Therefore, by adjusting the angle of the sensor head 31, even when the distance in the axial direction X from the surface of the tire 1 to the sensor head 31 changes, the distance to the surface of the tire 1 can be adjusted while maintaining the angle of the sensor head 31.
As shown in fig. 2, the radial movement mechanism 36 has a sub movement mechanism 36B and a main movement mechanism 36A. The main movement mechanism 36A is configured such that the maximum movement distance of the sensor head 31 is longer than that of the sub movement mechanism 36B.
The sub-movement mechanisms 36B are provided in a pair of upper and lower positions. The sub-movement mechanism 36B includes an actuator 45, a guide member 46, and a support frame 47. The actuator 45 is constituted by an electric cylinder, for example. The electric cylinder 45 expands and contracts in the radial direction Y by being supplied with electric power.
The electric cylinder 45 has a cylinder main body 45a and a piston rod 45 b. The cylinder main body 45a is attached to the support frame 47. The front end of the piston rod 45b is coupled to the support frame 43 of the angle adjustment mechanism 35. Therefore, when the electric cylinder 45 is extended and contracted, the angle adjustment mechanism 35 and the sensor head 31 move in the radial direction Y.
The guide member 46 guides the movement of the angle adjustment mechanism 35 and the sensor head 31 so that the movement of the angle adjustment mechanism 35 and the sensor head 31 in the radial direction Y due to the expansion and contraction of the electric cylinder 45 is smoothly performed. The guide member 46 has a guide shaft 46a and a guide cylinder 46 b. The guide shaft 46a is disposed along the radial direction Y, and one end thereof is coupled to the support frame 43 of the angle adjustment mechanism 35. The guide cylinder 46b is mounted to the support frame 47. The guide cylinder 46b is inserted with the guide shaft 46a being slidable, and guides movement of the guide shaft 46a in the radial direction Y (axial direction of the guide shaft 46 a).
The support frame 47 of the sub-movement mechanism 36B is supported by an axial movement mechanism 37, which will be described later, and the support frame 53 of the axial movement mechanism 37 is supported by the main movement mechanism 36A.
The main movement mechanism 36A is constituted by a screw feed mechanism 49 such as a ball screw. The screw feed mechanism 49 has: a threaded shaft 49a arranged along the radial direction Y; a drive motor 49b that rotationally drives the screw shaft 49 a; and a nut member 49c attached to the threaded shaft 49 a.
The nut member 49c is coupled to the support frame 53 of the axial movement mechanism 37. The nut member 49c moves in the radial direction Y (axial direction of the screw shaft 49 a) by the rotation of the screw shaft 49 a. Therefore, the axial moving mechanism 37, the sub-moving mechanism 36B, the angle adjusting mechanism 35, and the sensor head 31 also move in the radial direction Y together with the nut member 49 c.
Fig. 4 (a) is a sectional view a-a of fig. 2, and fig. 4 (b) is a sectional view C-C of fig. 2.
As shown in fig. 2 and 4, the axial movement mechanism 37 includes a screw feed mechanism 51 such as a ball screw, a guide member 52, and a support frame 53.
The screw feed mechanism 51 includes: a screw shaft 51a mounted on an upper portion of the support frame 53; a screw shaft 51b provided on the upper and lower portions of the support frame 53; and a drive motor 51c for rotationally driving the screw shafts 51a and 51 b. The threaded shafts 51a and 51b are arranged along the axial direction X. As shown in fig. 4 (a), a nut member 51d coupled to the support frame 47 of the upper sub-movement mechanism 36B is attached to the screw shaft 51 a. As shown in fig. 4 (B), a nut member 51d coupled to the support frame 47 of the lower sub-movement mechanism 36B is attached to the screw shaft 51B.
The guide member 52 guides the movement of the upper and lower sub-movement mechanisms 36B in the axial direction X. The guide member 52 has: guide shafts 52a provided to be bridged to upper and lower portions on both sides in the width direction of the support frame 53; and a guide cylinder 52B attached to the support frame 47 of the upper and lower sub-movement mechanisms 36B, and into which the guide shaft 52a is slidably inserted.
Therefore, when the screw shafts 51a and 51B are rotationally driven by the respective drive motors 51c, the upper and lower sub-movement mechanisms 36B move in the axial direction X (vertical direction) while being guided by the guide member 52. The upper sub-movement mechanism 36B and the lower sub-movement mechanism 36B move in opposite directions to each other. By the movement of the sub-moving mechanism 36B, the angle adjusting mechanism 35 and the sensor head 31 are also moved together.
The upper sensor head 31 is moved in the axial direction X by the axial movement mechanism 37 between a measurement position close to the upper sidewall surface B of the tire 1 and an upper retracted position. The lower sensor head 31 is moved in the axial direction X by the axial moving mechanism 37 between a measurement position close to the lower sidewall surface B of the tire 1 and a retracted position below.
Fig. 5 and 6 are schematic front views for explaining the operation of the mobile device.
As shown in fig. 5 (a), before the detection of the wire is started, the sensor head 31 of the detection device 12 is disposed at a position separated from the tire 1 in the axial direction X and the radial direction Y. When the tire 1 provided on the rotating device 11 rotates, the wire detecting operation is started.
First, as indicated by an arrow a in fig. 5 (a), the sensor head 31 is largely moved in the radial direction Y by the main movement mechanism 36A of the radial movement mechanism 36. After that, as indicated by an arrow b in fig. 5 (b), the sensor head 31 is moved in the axial direction X by the axial moving mechanism 37. Then, the sensor head 31 is moved slightly in the radial direction Y by the sub-moving mechanism 36B as indicated by an arrow c in fig. 6, and the angle is adjusted in a manner to match the sidewall surface B of the tire 1 by the angle adjusting mechanism 35 as indicated by an arrow d.
Through the above operations, the sensor head 31 is disposed at the measurement position along the sidewall surface B of the tire 1. When the wire detection operation is completed, the angle adjustment mechanism 35, the axial movement mechanism 37, and the radial movement mechanism 36 perform the reverse operation, and the sensor head 31 is retracted to a position separated from the tire 1 as shown in fig. 5 (a).
(construction of information acquiring apparatus 15)
The information acquisition device 15 acquires and stores information relating to the shape of the tire 1, such as the cross-sectional width dimension, tread width dimension, height dimension, outer diameter dimension, rim diameter, rim width, and aspect ratio of the tire 1, in advance before the detection operation of the wire is performed by the detection device 12, for example, while the tire 1 is set in the rotation device 11. The information acquisition device 15 is configured by a computer or the like having a control unit such as a CPU and a storage unit for storing information, and the control unit executes processing for acquiring information and processing for outputting information.
The information acquisition device 15 can acquire information relating to the shape of the tire 1 by, for example, manual input, automatic reading, or the like. As the automatic reading, for example, a method of reading information by photographing a stamp or a print provided on the sidewall 3 of the tire 1 and performing character recognition by image processing can be adopted. In this case, the information acquisition device 15 includes an imaging device that captures an image, and the control unit executes image processing. Further, as the automatic reading, a method of reading information from a barcode or the like may be employed.
(construction of control device 14)
The control device 14 is configured by a computer or the like having a control unit such as a CPU and a storage unit for storing information, and performs various functions by the control unit executing programs stored in the storage unit. For example, the control device 14 has a function of controlling the operation of the mobile device 13. Specifically, the controller 14 controls the operation of the electric cylinder 42 in the angle adjustment mechanism 35 and the electric cylinder 45 in the radial movement mechanism 36. Further, the control device 14 controls the operations of the drive motor 49b in the radial movement mechanism 36 and the drive motor 51c in the axial movement mechanism 37.
The controller 14 moves the sensor head 31 by a predetermined amount by controlling the operations of the respective mechanisms 35, 36, and 37, and moves the sensor head to a measurement position near the surface (sidewall surface B) of the tire 1. Therefore, the control device 14 controls the amount of movement of the sensor head 31 generated by the moving device 13.
The control device 14 is connected to the information acquisition device 15, and inputs information on the shape of the tire 1 from the information acquisition device 15. The control device 14 controls the mobile device 13 based on the information input from the information acquisition device 15. Specifically, the control device 14 determines the operation amounts of the respective mechanisms 35, 36, and 37 of the moving device 13 using information such as the width and height of the tire 1, and operates the respective mechanisms 35, 36, and 37. Therefore, the sensor head 31 can be moved in accordance with the shape of the tire 1 provided on the rotating device 11, and the sensor head 31 can be positioned at an appropriate measurement position.
The output of the sensor unit 32 in the detection device 12, that is, detection data relating to the position of the metal wire (the distance from the metal wire to the sensor head 31) is input to the control device 14. Further, data of the rotation angle detected by the rotation detector 27 of the rotating device 11 is input to the control device 14. Then, the control device 14 stores the detection data of the sensor unit 32 and the angle data of the rotation detector 27 in association with each other. Therefore, when the presence of an abnormality is confirmed in the detection data of the sensor unit 32, the circumferential position where the abnormality is present can be specified from the rotation angle of the tire 1.
The control device 14 can output information corresponding to the detection data of the sensor unit 32 and the angle data of the rotation detector 27 to the output device 16 such as a display. In this case, when there is an abnormality in the detection data, the abnormality can be output and notified to the operator.
Fig. 7 is a flowchart showing the procedure of the process of the control device 14 as described above.
In step S1, control device 14 receives input of information relating to the shape of tire 1 from information acquisition device 15. Then, in step S2, the control device 14 controls the moving device 13 to move the sensor head 31 to the measurement position based on the information input from the information acquisition device 15.
Thereafter, in step S3, control device 14 acquires detection data from sensor unit 32 and acquires data of the rotation angle of tire 1 from rotation detector 27. In step S4, the control device 14 stores the detection data and the angle data in association with each other. Then, in step S5, the control device 14 outputs information about the detection data and the angle data to the output device 16.
Through the above processing, the arrangement and disorder of the belt cords in the tire 1 can be grasped, and an abnormality can be detected before shipment of the product. Further, since the sensor head 31 of the detection device 12 can be accurately positioned at the measurement position according to the shape of the tire 1, the metal wire can be accurately detected.
[ Effect of embodiment ]
(1) The wire detection system 10 of the above embodiment is a wire detection system that detects a belt cord made of metal embedded in the tire 1 from the outside of the tire 1. The wire detection system 10 includes: a rotating device 11 that rotates the tire 1; a detection device 12 having a sensor head 31, the sensor head 31 being disposed at a predetermined measurement position in the vicinity of the surface of the tire 1 rotated by the rotation device 11; a moving device 13 that moves the sensor head 31; and a control device for controlling the operation of the moving device 13 so that the sensor head 31 moves to a measurement position corresponding to the shape of the tire 1.
Since the controller 14 controls the operation of the moving device 13 so that the sensor head 31 moves to the measurement position corresponding to the shape of the tire 1, the sensor head 31 can be moved to an appropriate measurement position.
In addition, the mobile device 13 includes: a radial movement mechanism 36 that moves the sensor head 31 in the radial direction Y of the tire 1; an axial moving mechanism 37 that moves the sensor head 31 in the axial direction X of the tire 1; and an angle adjusting mechanism 35 that adjusts the angle of the sensor head 31 with respect to the surface of the tire 1.
The sensor head 31 can be moved to an appropriate radial position corresponding to the height dimension of the tire 1 by the radial moving mechanism 36, and the sensor head 31 can be moved to an appropriate position corresponding to the width dimension of the tire 1 by the axial moving mechanism 37. Further, the angle of the sensor head 31 can be adjusted by the angle adjusting mechanism 35 in accordance with the surface shape of the tire 1.
In the above embodiment, the moving device 13 has both the radial moving mechanism 36 and the axial moving mechanism 37, but may have only one of the radial moving mechanism 36 and the axial moving mechanism 37.
(2) In the above embodiment, the sensor head 31 is attached to the angle adjustment mechanism 35. Therefore, the angle of the sensor head 31 can be directly adjusted by the angle adjusting mechanism 35, and the angle can be adjusted more accurately in accordance with the surface shape of the tire 1.
(3) In the above-described embodiment, the angle adjustment mechanism 35 is attached to the radial movement mechanism 36 (sub-movement mechanism 36B). Therefore, the sensor head 31 and the angle adjustment mechanism 35 can be positioned at appropriate radial positions with respect to the tire 1 by the radial movement mechanism 36.
The angle adjusting mechanism 35 may be attached to the axial moving mechanism 37. In this case, the sensor head 31 and the angle adjustment mechanism 35 can be positioned at appropriate axial positions with respect to the tire 1 by the axial movement mechanism 37.
(4) In the above-described embodiment, the radial movement mechanism 36 includes the main movement mechanism 36A in which the maximum movement distance of the sensor head 31 is large and the sub-movement mechanism 36B in which the maximum movement distance of the sensor head 31 is small. The axial moving mechanism 37 is attached to the main moving mechanism 36A, the sub moving mechanism 36B is attached to the axial moving mechanism 37, and the angle adjusting mechanism 35 is attached to the sub moving mechanism 36B. Therefore, the main moving mechanism 36A largely moves the axial moving mechanism 37, the sub moving mechanism 36B, the angle adjusting mechanism 35, and the sensor head 31 in the radial direction Y, so that the sensor head 31 can be quickly brought close to the tire 1 or separated from the tire 1, and the sub moving mechanism 36B slightly moves the sensor head 31 in the radial direction Y, so that the sensor head 31 can be easily positioned at a more appropriate radial position with respect to the tire 1.
(5) In the above embodiment, the angle adjusting mechanism 35 includes: 2 electric cylinders 42 arranged in parallel with each other; and a mounting member 41 to which the sensor head 31 is mounted and which is coupled to the piston rods 42b of the two electric cylinders 42. Therefore, by extending and contracting the 2 electric cylinders 42, the angle of the sensor head 31 can be adjusted via the attachment member 41. Even if the radial position or the axial position of the sensor head 31 fluctuates in accordance with the adjustment of the angle of the sensor head 31, the radial position or the axial position of the sensor head 31 can be adjusted while maintaining the angle by extending and contracting the 2 electric cylinders 42.
(6) In the above-described embodiment, the wire detecting system 10 further includes the information acquiring device 15, and the information acquiring device 15 acquires information related to the shape of the tire 1. The control device 14 controls the operation of the mobile device 13 based on the information input from the information acquisition device 15. Therefore, the sensor head 31 can be moved to an appropriate measurement position according to the shape of the tire 1.
(7) In the above-described embodiment, the wire detecting system 10 further includes the rotation detector 27, and the rotation detector 27 detects the rotation angle of the tire 1. Then, the control device 14 performs processing for associating the detection data of the detection device 12 with the angle data of the rotation detector 27. Therefore, the state of the arrangement of the belt cords of the tire 1 and the position in the rotational direction of the tire 1 can be grasped together, and the specific circumferential position can be determined when there is an abnormality in the arrangement of the belt cords and the like.
(8) In the above-described embodiment, a wire detecting method for detecting a belt cord embedded in the tire 1 from the outside of the tire 1 is disclosed. The method comprises the following steps: acquiring information relating to the shape of the tire 1; rotating the tire; moving the sensor head 31 of the detection device 12 to a predetermined measurement position near the surface of the tire 1 based on the obtained shape of the tire; and the belt cord is detected by the detecting device 12.
By such a method, the sensor head 31 can be moved to an appropriate measurement position according to the shape of the tire 1.
[ DEFORMATION ] OF THE PREFERRED EMBODIMENT
While the embodiments of the present invention have been described in detail, the present invention is not limited to the above-described embodiments, and can be implemented in various forms.
Fig. 8 is a front view showing a modification of the angle adjustment mechanism.
In the above-described embodiment, the electric cylinders 42 of the angle adjustment mechanism 35 are arranged parallel to each other in the axial direction X and arranged in parallel in the radial direction Y. However, the present invention is not limited to this, and can be modified as shown in fig. 8.
In the modification shown in fig. 8 (a), 2 electric cylinders 42 are arranged in parallel with each other in the radial direction Y and are arranged in parallel in the axial direction X. By extending and contracting each electric cylinder 42 in the radial direction Y independently, the angle of the sensor head 31 can be adjusted to match the surface of the tire 1.
In the modification shown in fig. 8 (b), the 2 electric cylinders 42 are arranged in parallel with each other and are arranged in parallel in a direction inclined with respect to the axial direction X and the radial direction Y. By extending and contracting each electric cylinder 42 independently, the angle of the sensor head 31 can be adjusted to match the surface of the tire 1.
In the above-described embodiment, the electric cylinders are used as the actuators 42 and 45 of the angle adjustment mechanism 35 and the radial movement mechanism 36 (sub movement mechanism 36B), but a fluid pressure cylinder that operates by fluid pressure may be used.
The axial movement mechanism 37 and the radial movement mechanism 36 (main movement mechanism 36A) may include an actuator such as an electric cylinder, a chain conveying mechanism, and the like instead of the screw feed mechanism.
The rotating device 11 is not limited to a tire testing machine, and can be applied to any device for rotating a tire used in a process of manufacturing a tire after vulcanization molding. The rotating device 11 may be a device dedicated to the wire detection system.
In the above-described embodiment, the radial movement mechanism 36 is constituted by the main movement mechanism 36A and the sub movement mechanism 36B, but may be constituted by only one of them.
Claims (8)
1. A wire detecting system of a tire, which detects a wire embedded in a tire from the outside of the tire, wherein,
the wire inspection system for a tire includes:
a rotating device that rotates the tire;
a detection device having a sensor head disposed at a predetermined measurement position near a surface of the tire rotated by the rotation device;
a moving device that moves the sensor head; and
a control device that controls an operation of the moving device so that the sensor head moves to the measurement position corresponding to a shape of the tire,
the mobile device has:
at least one of a radial movement mechanism that moves the sensor head in a radial direction of the tire and an axial movement mechanism that moves the sensor head in an axial direction of the tire; and
an angle adjustment mechanism that adjusts an angle of the sensor head with respect to a surface of the tire.
2. The wire detecting system of a tire according to claim 1,
the sensor head is mounted to the angle adjustment mechanism.
3. The wire detecting system of a tire according to claim 2,
the angle adjusting mechanism is mounted on either the radial moving mechanism or the axial moving mechanism.
4. The wire detecting system of a tire according to claim 3,
the radial movement mechanism is composed of a main movement mechanism in which the maximum movement distance of the sensor head is large and a sub-movement mechanism in which the maximum movement distance is small,
the axial moving mechanism is arranged on the main moving mechanism,
the auxiliary moving mechanism is arranged on the axial moving mechanism,
the angle adjusting mechanism is mounted on the auxiliary moving mechanism.
5. The wire inspecting system of a tire according to any one of claims 1 to 4,
the angle adjustment mechanism has: 2 cylinders arranged in parallel with each other; and a mounting member to which the sensor head is mounted and which is coupled to the piston rods of the 2 cylinders.
6. The wire inspecting system of a tire according to any one of claims 1 to 4,
the wire detecting system for a tire further includes an information acquiring device that acquires information related to the shape of the tire,
the control device controls the operation of the mobile device based on the information input from the information acquisition device.
7. The wire inspecting system of a tire according to any one of claims 1 to 4,
the wire detecting system further has a rotation detector that detects a rotation angle of the tire,
the control device performs processing for associating the detection data of the detection device with the angle data of the rotation detector.
8. A method for detecting a wire embedded in a tire from the outside of the tire,
the metal wire detection method of the tire comprises the following steps:
obtaining information relating to the shape of the tire;
rotating the tire;
moving a sensor head of a detection device to a predetermined measurement position near a surface of the tire based on the obtained shape of the tire; and
the metal line is detected by the detection means.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018235809A JP7255162B2 (en) | 2018-12-17 | 2018-12-17 | Tire metal wire detection system and metal wire detection method |
| JP2018-235809 | 2018-12-17 |
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| Publication Number | Publication Date |
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| CN111323244A true CN111323244A (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911029212.1A Pending CN111323244A (en) | 2018-12-17 | 2019-10-28 | Metal wire detection system and metal wire detection method for tire |
Country Status (2)
| Country | Link |
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| JP (1) | JP7255162B2 (en) |
| CN (1) | CN111323244A (en) |
Cited By (1)
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| CN113218277A (en) * | 2021-03-30 | 2021-08-06 | 嘉兴逸合盛制冷科技有限公司 | Device capable of improving detection precision of automobile detection equipment |
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| JP7255162B2 (en) | 2023-04-11 |
| JP2020098121A (en) | 2020-06-25 |
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