JP3932440B2 - Tire uniformity measuring method and measuring apparatus therefor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tire uniformity measuring apparatus that measures tire uniformity and, if necessary, corrects the uniformity by a grinder mechanism.
[0002]
[Prior art]
The tire uniformity measuring device presses a rotating drum as a substitute road surface with a flat surface against a measured tire attached to a rotating shaft, measures a component of triaxial force generated when the tire rotates, and Based on the measurement result, the grinder mechanism cuts the required part and corrects the uniformity.
[0003]
The uniformity is corrected while the rotating drum is pressed against the tire, and the result of the correction is measured. If necessary, the uniformity is corrected again.
Conventionally, one rotating drum and a grinder mechanism are generally provided as a set for one transfer line (Japanese Patent Publication No. 53-14598).
[0004]
In addition, there is an example in which two transfer lines share one rotating drum, but uniformity measurement and correction control when entering tire uniformity correction are the same as in the case of one transfer line.
[0005]
[Problems to be solved by the invention]
Therefore, when the uniformity correction is entered in one of the transfer lines, the rotating drum is continuously pressed against the tire, and the corrected uniformity measurement is continued, and if further correction is made, the subsequent uniformity measurement is continued. Until the correction is completed, the uniformity measurement is intermittently performed while being pressed against the tire of one transfer line.
[0006]
Therefore, the uniformity measurement in the other transfer line is not performed, and the work efficiency is extremely low.
[0007]
Therefore, it is sufficient to prepare rotating drums for the two transfer lines and perform uniformity measurement independently. However, two rotating drums must be arranged, which increases the equipment cost.
[0008]
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and the object of the present invention is a tire uniformity measurement method and measurement capable of efficiently performing tire uniformity measurement without causing a stagnation of one transfer line due to tire uniformity correction or the like. The point is to provide the device.
[0009]
[Means for solving the problems and effects]
In order to achieve the above-mentioned object, the present invention can support and rotate a tire by a rim shaft provided at each halfway opposite position of a two-line parallel transfer conveyor for transferring the tire, In a tire uniformity measurement method in which a rotating drum disposed between shafts moves in the left-right direction and presses against a tire supported on the rim shaft of one line and rotates together with the tire, the rim of one line is detected. When the uniformity measurement of one tire supported by the shaft is completed, the rotating drum is moved to the center of both lines, and then moved to the line ready for uniformity measurement and supported by the rim shaft of the line. Measure tire uniformity In addition, uniformity correction by a grinder mechanism provided on the opposite side of the rotating drum with each transfer conveyor sandwiched between the left and right transfer conveyors and uniformity measurement by the rotating drum can be controlled simultaneously on each line. The tire uniformity measurement method was adopted.
[0010]
When the uniformity measurement of one tire is completed, the rotating drum is moved to the center of both lines, and then moved to the line ready for uniformity measurement to measure the uniformity of the tire supported on the rim shaft of the line. So, if the tires flowing through both lines are flowing smoothly without the need for uniformity correction, you can prepare for uniformity measurement on the other line while measuring uniformity on one line, so one rotating drum However, the work can be efficiently performed by moving alternately between both lines.
[0011]
When the uniformity of the tire supported on the rim shaft of one line is being corrected, the uniformity of the tire supported on the other rim shaft can be measured, so even one rotating drum can be used on one line. Therefore, the uniformity measurement operation can be performed efficiently.
[0012]
In addition, if the rim is replaced on the other line, trouble occurs, maintenance is in progress, etc., and the flow is stagnant, preparation for uniformity measurement on the other line is completed first. The rotating drum that has moved to the center of both lines can return to the same line again without wasteful movement or standby, and perform uniformity measurement on one line until the other line returns. Can do.
[0014]
While the uniformity measurement is performed on one line by the rotating drum, the uniformity can be corrected by the grinder mechanism on the other line if necessary, so that the work efficiency can be improved.
[0015]
Claim 2 The invention described in the present invention includes two parallel transfer conveyors for transferring tires, a rim shaft that is provided at an intermediate position opposite to each other on the left and right transfer conveyors, and that supports and rotates the tires by upper and lower rims. A rotating drum that is arranged between the rim shafts of the line and moves in the left-right direction and presses against the tire supported on the rim shaft of the one line and rotates together with it, and is supported by the rim shaft of one line When the uniformity measurement of one tire is finished, the rotating drum is moved to the center of both lines, and then moved to the line ready for uniformity measurement, and the uniformity of the tire supported on the rim shaft of the line. Control means for controlling to perform the measurement; Each of the left and right transfer conveyors includes a grinder mechanism provided on the opposite side of the rotary drum with each transfer conveyor interposed therebetween, and the control unit performs uniformity measurement by the rotary drum and uniformity correction by the grinder mechanism. Can be controlled simultaneously on the line This is a tire uniformity measuring device.
[0016]
When the uniformity measurement of one tire is finished, the control means moves the rotating drum to the center of both lines, then moves to the line ready for uniformity measurement, and is supported on the rim shaft of the line. Therefore, even a single rotating drum can be moved between both lines without waste and work can be performed efficiently.
[0018]
The control means can perform the uniformity correction by the grinder mechanism on the other line while performing the uniformity measurement by the rotating drum on one line, and can improve the work efficiency.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment according to the present invention will be described with reference to FIGS.
1 is a partially omitted plan view of a tire uniformity measurement correction device 1 according to the present embodiment. First, measured tires 2 are carried one by one from a stock conveyor 10 at an upstream end to a tire identification device 11.
[0020]
In the tire identification device 11, the tire 2 is rotated about the vertical axis, the barcode identification paper stuck to the sidewall of the tire is read by the barcode reader 11a, and the tire information is input.
At the same time, a silicon thin solution is applied to the bead portion of the tire by the lubricant applicator 11b.
Silicon thinning liquid ensures smooth and reliable fitting between the tire and the rim.
[0021]
A distribution device 12 is disposed on the downstream side of the tire identification device 11, and the distribution device 12 tilts the tilting plate 12a on which the tire 2 is placed to the left and right and also tilts forward, so that the tire 2 can be moved in any of the three directions. Can be sorted.
[0022]
When there are two types of tires that are scheduled to be measured, the tire identification device 11 judges the tire information that is input and distributes it to either the left or right side. When it has been done, it is sorted forward.
[0023]
In addition, when measuring only the same type of tires, unreadable or unscheduled tires are assigned to the front and the left and right are assigned alternately.
The tires distributed forward fall on the tilting plate 13a from the dropping port 13, and one of the left and right tilts of the tilting plate 13a causes one of the unreadable barcodes to roll out and the other is unscheduled. Tires are rolling out.
[0024]
The tires distributed from the distribution device 12 to the left and right are conveyed to either one of the left and right parallel transfer conveyors 20 and 20 by the curved roller conveyors 14 and 14 that change the traveling direction to a right angle.
The left and right transfer conveyors 20 and 20 have a symmetric structure with a predetermined gap therebetween, and a part of the rim exchanging device is disposed in the long space between the two.
[0025]
Since the left and right transfer conveyors 20 and 20 are symmetrical, one of them will be described below.
The transfer conveyor 20 is composed of three blocks, a centering block 21, a measurement block 22, and a transfer block 23 in order from the upstream side, and each block is constituted by a roller conveyor.
[0026]
1 and 2, in the centering block 21, a plurality of transport rollers are rotated at a constant speed by a motor 21a, and a pair of stoppers 21b and 21b and centering arms 21c and 21c are provided swingably on the left and right. Then, the tire 2 that has been conveyed is stopped by the stoppers 21b and 21b, and the tire 2 is centered so as to be sandwiched from the left and right by the centering arms 21c and 21c, and then positioned so as to advance a predetermined center position.
[0027]
In the next-stage measurement block 22, a plurality of rollers are rotated at a constant speed by a motor 22a, and the rollers can rotate forward and backward and can also be conveyed upstream.
In this measurement block 22, a pair of left and right positioning arms 22b, 22b are disposed so as to be swingable in a predetermined position in two pairs in the front-rear direction, and the tire is positioned by the four positioning arms 22b.
When the tire 2 is positioned in the measurement block 22 in this way, the central axis oriented in the vertical direction of the tire 2 coincides with the upper and lower rim shafts 25 and 26.
[0028]
The roller of the part which supports the tire 2 in which the measurement block 22 is positioned has a short shaft divided into left and right, and forms a gap in the center part of the tire.
The upper rim shaft 25 is suspended above the gap, the upper rim 3 is detachably attached to the lower end, and the lower rim 4 is detachably attached to the upper end of the lower rim shaft 26 below the same axis. It is attached.
[0029]
The lower rim shaft 26 can be moved up and down, and the lower rim 4 attached to the upper end can penetrate vertically through the gap formed by the short shaft conveying roller.
On the other hand, the upper rim shaft 25 is rotatably supported by a support frame 30 installed between the left and right measurement blocks 22 and 22, and a drive shaft of a servo motor 31 is connected to a portion protruding upward (see FIG. 2, see FIG.
The servo motor 31 is fixedly supported by a support frame 30 installed between the support columns 29 via a bracket.
[0030]
Below the center of the support frame 30 is disposed a rectangular frame 41 that is a holding member that is slidable left and right while being guided by four rails 40 that are laid in the horizontal direction in the horizontal direction. A rotating drum 42 is supported on the rectangular frame 41 by a vertical support shaft 42a.
[0031]
As shown in FIG. 4, the rectangular frame 41 is slidable to the left and right in a posture in which a rectangular shape is formed by the upper and lower side walls and the front and rear side walls, and the left and right sides are opened. It is pivotally supported so as to protrude from the outside.
[0032]
A hydraulic cylinder 43 is suspended from the support frame 30 on the side of the upper side wall of the rectangular frame 41 (see FIG. 3), and the tip of the cylinder rod 43a of the hydraulic cylinder 43 is fixed to the side wall of the rectangular frame 41. As the cylinder rod 43a of the hydraulic cylinder 43 expands and contracts, the rectangular frame body 41 slides left and right together with the rotating drum 42.
The upper and lower side walls of the rectangular frame body 41 are supported by the front and rear side walls, so that sufficient rigidity and strength can be secured structurally and the rotary drum 42 can be pivotally supported.
[0033]
A load cell 45 is provided at the bearing portion of the support shaft 42a that supports the rotating drum 42, and the magnitude of the force variation in the radial direction of the tire is RFV (Radial Force Variation), and the lateral direction (axial direction) of the tire. The magnitude of force variation LFV (Lateral Force Variation) is detected.
A marking device 27 is suspended at a predetermined position above the roller conveyor of the measurement block 22.
[0034]
The measuring block 22 is provided with a pair of symmetrical grinder mechanisms 32 on the opposite side of the rotating drum 42 across the roller conveyor.
The upper grinder mechanism 32 will be described with reference to FIGS. 5 and 6. A swing member 33 is supported by a bracket 29a projecting from a downstream support column 29 via a support shaft 34 so as to be swingable horizontally. The cylinder rod 35a of the servo cylinder 35 pivotally supported by the bracket 29b of the other upstream column 29 is pivotally attached to the swing member 33, and the swing member 33 is driven by the drive of the servo cylinder 35. It swings.
[0035]
A motor 36 is provided on the base end side of the swing member 33, and a chain 38 is formed between a sprocket that is supported on the drive shaft of the motor 36 by a grinder 37 pivotally supported on the tip end side and a sprocket integrated with the grinder 37. A grinder 37 provided at the tip of the swing member 33 is rotated by driving the motor 36.
[0036]
The swing member 33 can be moved up and down somewhat, and the vertical position of the grinder 37 can be adjusted by moving up and down together with the grinder drive mechanism by driving the lifting motor 39.
[0037]
Accordingly, the grinder 37 is set at a required height position with respect to the rotating tire 2 held in the horizontal posture on the upper and lower rims 3 and 4, and the rotating grinder 37 is swung by the servo cylinder 35 to rotate the grinder 37. It is possible to correct the uniformity by cutting the two required locations.
[0038]
The upper grinder mechanism 32 receives the upper half of the tire 2 in a horizontal posture, and the grinder mechanism 32 provided symmetrically on the lower side receives the lower half of the tire 2.
A pair of upper and lower grinder mechanisms 32 is provided on each of the left and right transfer lines.
[0039]
A transport block 23 subsequent to the measurement block 22 in the transfer conveyor 20 is an inclined roller conveyor, and the tire 2 and the like are transported by its own weight.
A stopper 23a which can be moved in and out is provided at a predetermined position near the downstream end.
[0040]
On the downstream side of the above transfer conveyor 20, a distribution conveyor 50 is disposed long in the left-right width direction so as to be continuous with the left and right transfer conveyors 20, 20, and a roller conveyor corresponding to an extension of the left and right transfer conveyors 20, 20 The three-row roller conveyors 51 and 51 and the roller conveyor 52 sandwiched between the roller conveyors 51 and 51 are inclined to convey the tire 2 to the downstream side by its own weight.
[0041]
A plurality of ropes that can be raised and lowered between the rollers of the roller conveyors 51, 52, 51 are stretched across the left and right directions to constitute a rope conveyor 53.
Therefore, if the rope conveyor 53 remains in the lowered state, the tire 2 conveyed from the transfer conveyor 20 is conveyed linearly on the roller conveyor 51, and is unloaded, but when the rope conveyor 53 rises at an appropriate timing, The rope conveyor 53 supports the tire, and therefore the tire 2 can be moved left and right by the rotation of the rope conveyor 53.
[0042]
When the rope conveyor 53 is lowered at a place where it has moved appropriately, it is transferred to one of the roller conveyors 52 and 51, and is carried out by the transferred roller conveyors 52 and 51.
When the rope conveyor 53 moves the tire 2 in either the left or right direction beyond the end, it can be carried out in either the left or right direction.
Therefore, as shown by the arrows in FIG. 1, the tires 2 can be distributed to five places on the distribution conveyor 50 and carried out.
[0043]
The above is the overall schematic structure of the tire uniformity measurement / correction device 1, but the tire uniformity measurement / correction device 1 is provided with a rim replacement device 60 that automatically replaces the rims 3, 4.
A space between the left and right transfer conveyors 20 and 20 is used for the rim exchanging device 60, and a lifting rim storage shelf 61 is disposed in the space between the centering blocks 21 and 21.
[0044]
As shown in FIG. 7, the lift rim storage shelf 61 is a box that is long in the vertical direction, and is open on the front and left and right sides, and is formed with four stages on the inside by the loading conveyor 62. Has been.
In each loading conveyor 62, each roller is rotated at a constant speed by a motor 63 via a belt.
[0045]
A slider 64 protrudes from the back plate of the lift rim storage shelf 61, and the slider 64 is slidably fitted to a standing support rail 65 to support the lift rim storage shelf 61 so as to be lifted and lowered. A screw shaft 66 extends vertically in the support rail 65 and is screwed into and penetrates the slider 64.
[0046]
The screw shaft 66 is rotated via a timing belt 68 by a motor 67 fixed to the lower end of the support rail 65, and the lifting rim storage shelf 61 is moved up and down via the slider 64 by the rotation of the screw shaft 66.
[0047]
The upper and lower rims 3, 4 are placed on the plate-like pallet 5 in a state where they are stacked one above the other, and are transported or placed on each mounting conveyor 62 of the lifting rim storage shelf 61. 7 has a rectangular plate shape with reference to FIG. 7, and has a circular hole 5a at the center that is smaller than the outer diameter of the lower rim shaft 4 but larger than the outer diameter of the lower rim shaft 26, and from the one side to the same circular hole 5a. A leading notch 5b is formed.
As shown in FIG. 7, the empty pallet 5 on which the upper and lower rims 3 and 4 are not placed is also placed on the placement conveyor 62 described above.
[0048]
The lifting rim storage shelf 61 can control the lifting and lowering so that each loading conveyor 62 can be set at the same height as the rollers of the centering block 21.
A transfer device 70 is disposed on each outer side of the centering blocks 21 and 21 (see FIG. 1). The transfer device 70 includes a cylinder 71 and a holding arm 72 provided at the tip of a cylinder rod that expands and contracts. .
[0049]
The transfer device 70 extends the cylinder rod and takes the upper and lower rims 3 and 4 on the loading conveyor 62 of the lifting rim storage shelf 61 at the same height as the roller of the centering block 21, and the holding arm 71 is moved to the upper and lower rims. The pallet 5 on which 3 and 4 are placed can be sandwiched and transferred onto the rollers of the centering block 21.
[0050]
On the other hand, a table lifter 74 is disposed between the transfer blocks 23 and 23 of the left and right transfer conveyors 20 and 20, and a table 74a that moves up and down is formed by a roller conveyor.
The predetermined rising position of the table 74a is slightly lower than the rollers of the transport block 23.
[0051]
Between the table lifter 74 and the lift rim storage shelf 61, a rim transport conveyor 75 comprising a roller conveyor is disposed, and the rim transport conveyor 75 is disposed at a position lower than the left and right transfer conveyors 20 and 20. Each roller is rotated at a constant speed by a motor 75a (see FIG. 2).
The predetermined lowering position of the table 74 a of the table lifter 74 is the same height position as the rim transport conveyor 75.
[0052]
Transfer cylinders 76 are arranged on the outer sides of the transfer blocks 23 and 23 of the left and right transfer conveyors 20 and 20, the cylinder rods of the transfer cylinders 76 extend inward, and the tip forms a pressing bar 76a. is doing.
[0053]
The transfer cylinder 76 extends the cylinder rod so that the pressing bar 76 a pushes the pallet 5 on the roller of the centering block 21, and the pallet 5 is placed on the table 70 a at the raised position of the table lifter 70 together with the upper and lower rims 3, 4. Alternatively, only the pallet 5 can be transferred.
[0054]
The tire uniformity measurement correction device 1 includes the rim replacement device 60 as described above.
Hereinafter, operation procedures of the tire uniformity measurement correction device 1 and the rim replacement device 60 will be described.
[0055]
Initially, predetermined upper and lower rims 3 and 4 are respectively mounted on the upper and lower rim shafts 25 and 26 of the left and right measuring blocks 22 and 22, and the upper and lower rims 3 and 4 having different sizes are mounted on the pallet 5 on the lifting rim storage shelf 61. The empty pallet 5 is also stored while being placed and stored.
[0056]
The tire 2 carried in from the stock conveyor 10 is first identified by reading a barcode in the tire identification device 11, and a silicon thin solution is applied to the bead portion and moved to the distribution device 12, so that the tire cannot be identified. Tires other than the predetermined size are dropped and discharged forward, and the other tires are distributed to the left or right according to the identified size.
In the case where the same type of tire is measured in the right and left measurement blocks, the tires that are carried in may be distributed alternately to the left and right in turn.
[0057]
The distributed tire 2 changes its direction by the curved roller conveyor 14 and enters the centering block 21 of the transfer conveyor 20, is centered by a pair of centering arms 21c and 21c on the left and right, and is measured at a predetermined timing by the stoppers 21b and 21b. Transferred to 22.
[0058]
In the measurement block 22, the tire 2 is positioned by the front, rear, left and right positioning arms 22 a, the lower rim shaft 26 positioned below is raised, and the lower rim 4 mounted at the upper end supports the bead portion of the tire 2 and the tire 2. The upper rim 3 mounted on the upper rim shaft 25 waiting upwards receives the bead portion of the tire 2, the upper and lower rims 3 and 4 are engaged, and the tire 2 has a predetermined height (same as the rotating drum 42). Height).
Then, air is supplied into the tire to obtain a predetermined internal pressure.
[0059]
In this way, the hydraulic cylinder 43 is driven to the measurement block 22 in the line where preparation for uniformity measurement is completed, and the rotary drum 42 is moved to press the tire 2 with a predetermined pressure.
By driving one servo motor 31, the predetermined upper rim shaft 25 is rotated to rotate the tire 2.
The rotating drum 42 rotates together.
After the first few rotations, the uniformity measurement is performed in the reverse rotation, and then the measurement is performed in the forward rotation.
[0060]
The uniformity measurement is performed over the entire circumference of the tire by detection by the load cell 45, the result detected by the load cell 45 is processed by a computer, the uniformity measurement value is calculated, and the tire is evaluated by the measurement result such as RFV or LFV.
When uniformity measurement is performed in one measurement block 22, work such as attachment by the upper and lower rims 3 and 4 of the tire 2 can be performed simultaneously in the other measurement block 22, and work efficiency is good.
[0061]
If it is determined that the correction is required by the uniformity measurement, the rotating drum 42 is moved to the other measurement block 22 and the uniformity correction by the grinder mechanism 32 is started, but the work procedure when this uniformity correction is performed will be described later. First, a case where there is no uniformity correction will be described.
[0062]
Of the uniformity measurements, marks are given by the marking device 27 particularly at the tire points that show the maximum value of RFV.
The marking device 27 is moved to a designated position so that the rotation of the tire 2 is stopped when the tire portion showing the maximum value of RFV by the drive control of the servo motor 31 rotates to a predetermined position (for example, the most downstream side). A mark can be attached.
[0063]
When the measurement is completed, the rotary drum 42 returns to the center between the two original lines and waits, the internal pressure of the tire 2 is also released, the lower rim shaft 26 is lowered, and the tire 2 is placed on the roller of the measurement block 22, Transfer to the transport block 23.
The tire 2 that has transported the rollers of the transport block 23 moves to the sorting conveyor 50, and is discharged from one of the five discharge points in the sorting conveyor 50 according to the evaluation by the uniformity measurement.
[0064]
The measurement blocks 22 and 22 on the left and right of the two-line transfer conveyors 20 and 20 share one rotating drum 42, and when one measurement block 22 uses the rotating drum 42 for measurement, the other In the measurement block 22, preparation for uniformity measurement for attaching and detaching the tire 2 to and from the upper and lower rims 3, 4 can be performed, and the uniformity measurement work can be performed efficiently.
[0065]
The rotating drum 42 is controlled so as to move to the line where the preparation for uniformity measurement has been completed first and perform the uniformity measurement.
Therefore, if there is no uniformity correction on both lines and the uniformity measurement is performed smoothly, preparations for uniformity measurement are completed alternately on the left and right lines, so the rotation after returning to the center of both lines after completing the uniformity measurement on one line. The drum 42 moves to the other line where the preparation for uniformity measurement has been completed, and performs uniformity measurement.
[0066]
An example of the control procedure when the uniformity measurement is performed smoothly without uniformity correction is shown in the timing chart of FIG.
First, the first tire 2 enters the measurement block 22 of the transfer conveyor 20 on the left side line and is held by the upper and lower rims 3 and 4 and the rotating drum 42 is moved to the left side to perform uniformity measurement.
[0067]
During this time, if the tire 2 is not carried into the measurement block 22 on the right line and preparation for uniformity measurement is not made, the rotating drum 42 that has finished the uniformity measurement of the first tire 2 moves to the center of both lines and waits. Wait for the uniformity measurement.
[0068]
Here, preparation for uniformity measurement refers to a series of release of the previous tire from the upper and lower rims 3 and 4, removal from the measurement block 22, loading of the next tire into the measurement block 22, and holding by the upper and lower rims 3 and 4. The preparation for the uniformity measurement.
When the rotating drum 42 is waiting at the center of both lines, the left line is ready for uniformity measurement first, so the rotating drum 42 moves again to the measurement block 22 on the left line and the second tire 2 Measure uniformity.
[0069]
During this time, the third tire 2 is set on the upper and lower rims 3 and 4 in the measurement block 22 on the right side line, and the preparation for uniformity measurement is completed. Shortly before moving to the center of both lines and waiting, the measurement moves to the measurement block 22 on the right side line where preparation for uniformity measurement is completed, and uniformity measurement is performed on the third tire 2.
[0070]
Thereafter, if there is no uniformity correction on both lines and there is no other trouble, the preparation for uniformity measurement is completed alternately on the left and right lines, so that the rotating drum 42 reciprocates between both lines, and the uniformity measurement is performed alternately and efficiently.
[0071]
Note that two types of tires can be measured simultaneously by making the upper and lower rims 3 and 4 attached to the upper and lower rim shafts 25 and 26 of the measurement block 22 different from each other in the left and right measurement blocks 22 and 22.
[0072]
The rim replacement operation will be described. First, the empty pallet 5 stored in the lifting rim storage shelf 61 is moved from the mounting conveyor 62, which is the same height as the transfer conveyor 20, to the rollers of the centering block 21 by the transfer device 70. , And after centering, transfer to the measurement block 22.
[0073]
In the measuring block 22, the pallet 5 is stopped once it passes through the center, the lower rim shaft 26 is raised, the lower rim 4 is engaged with the upper rim 3, and the upper rim 3 is detached from the upper rim shaft 25. Then, it is supported so as to overlap the lower rim 4.
During this time, the roller of the measurement block 22 is reversely rotated to return the pallet 5 that has been stopped downstream to the center.
[0074]
Since the pallet 5 has the notch 5b on the upstream side, the pallet 5 reaches a position where the lower rim shaft 26 passes through the central circular hole 5a and stops.
Then, the lower rim shaft 26 is lowered, and the lower rim 4 is detached from the lower rim shaft 26 when the lower rim 4 is placed on the pallet 5.
[0075]
The upper and lower rims 3 and 4 are placed on the pallet 5 and are transferred to the next transport block 23 in this state, stopped at a predetermined position by the protrusion of the stopper 23a, and transferred to the side. The pallet 5 is pushed inward by 76 and moved to the table 74a of the table lifter 74 that has been waiting at the same height.
[0076]
When the table 74a is lowered to the same height as the rim transport conveyor 75, the upper and lower rims 3 and 4 are moved together with the pallet 5 to the rim transport conveyor 75 and transported to the lift rim storage shelf 61.
In the lifting rim storage shelf 61, the upper and lower rims 3, which have been transported by the rim transport conveyor 75, are set at the same height as the rim transport conveyor 75 by placing the loading conveyor 62 of a predetermined shelf in an empty state. 4 can be stored together with the pallet 5 on the loading conveyor 62.
[0077]
The above is the removal / recovery operation of the used upper and lower rims 3, 4. However, this operation and timing are somewhat delayed, and new upper and lower rims 3, 4 are supplied and attached.
That is, after the empty pallet 5 is unloaded from the lifting / lowering rim storage shelf 61, new upper and lower rims 3 and 4 stored in the lifting / lowering rim storage shelf 61 after a suitable time are transferred together with the pallet 5 by the transfer device 70. The used upper and lower rims 3, 4 are removed and transferred to the measurement block 22 after being transferred to 20.
[0078]
In the measurement block 22, when the new upper and lower rims 3, 4 and the pallet 5 are positioned at the center position and the lower rim shaft 26 is raised, the lower rim shaft 26 penetrates the circular hole 5 a of the pallet 5 and moves the lower rim 4. The upper rim 3 is abutted and mounted on the upper rim shaft 25 which is further lifted while the upper rim 3 is stacked on the lower rim 4 while being supported.
[0079]
During this time, the pallet 5 remaining on the roller is transferred to the transport block 23.
Although the lower rim shaft 26 passes through the circular hole 5a of the pallet 5, the notch 5b faces the upstream side, so that the pallet 5 can move from the lower rim shaft 26 to the downstream without any trouble.
[0080]
If the lower rim shaft 26 is lowered after the pallet 5 has moved to the transport block 23, the upper rim 3 remains attached to the upper rim shaft 25 and the lower rim 4 is mounted to the lower rim shaft 26. In this state, it is positioned below the roller and waits for the tire to be attached.
[0081]
The empty pallet 5 transferred to the transfer block 23 is transferred to the table 74a of the table lifter 74 by the transfer device 76, transferred from the lowered table 74a to the rim transfer conveyor 75, and transferred to a predetermined height. Is stored in the loading conveyor 62 of the lifting rim storage shelf 61 set to the above.
[0082]
As described above, the removal / recovery operation of the used upper and lower rims 3, 4 and the supply / attachment operation of the new upper and lower rims 3, 4 can be carried out completely and efficiently and smoothly.
[0083]
Next, a control procedure when uniformity is corrected will be described based on an example timing chart shown in FIG.
First, the first tire 2 enters the measurement block 22 of the transfer conveyor 20 on the left side line and is held by the upper and lower rims 3 and 4 and the rotating drum 42 is moved to the left side to perform uniformity measurement.
[0084]
During this time, the second tire 2 is prepared for uniformity measurement in the measurement block 22 on the right side line. After the uniformity measurement of the first tire 2 is performed, the rotating drum 42 moves to the center of both lines.
Since the preparation for uniformity measurement is completed on the right line, the rotating drum 42 further moves to the measurement block 22 on the right line and performs the uniformity measurement of the second tire 2.
[0085]
After this uniformity measurement, the rotating drum 42 moves to the center of both lines, and it is determined that the result of this uniformity measurement needs to be corrected, so the next line is already ready for measurement on the left line. The rotating drum 42 moves to the left side line and measures the uniformity of the third tire 2.
On the other hand, on the right line, the uniformity of the grinder mechanism 32 is corrected after the rotating drum 42 moves to the left side for the second tire 2.
[0086]
That is, as a result of uniformity measurement for the second tire 2, the cutting location is specified, the position of the grinder 37 is set in accordance with the same location, and the grinder 37 is applied to the tire 2 rotated by the servo motor 31 at the required rotational speed. Insulate, cut and correct Yumi Founity.
[0087]
While the uniformity correction is performed on the right side line, the uniformity measurement of the third tire 2 is performed by the rotating drum 42 on the left side line.
After measuring the uniformity of the third tire 2, the rotating drum 42 moves to the center of both lines and stands by.
[0088]
On the right line, the second tire 2 is still being corrected, and in the meantime the measurement preparation for the fourth tire 2 is completed on the left line, so the rotating drum 42 returns to the left line and the uniformity measurement of the fourth tire 2 is performed. Done.
After this measurement, the rotating drum 42 moves to the center of both lines and waits. However, the uniformity of the right tire is being corrected, the measurement of the fifth tire 2 on the left line is completed, the measurement returns to the left line, and the uniformity of the fifth tire 2 is restored. Measurement is performed.
[0089]
During this measurement, the correction of the second tire 2 is completed on the right side line, and the preparation of uniformity measurement of the next tire, that is, the sixth tire 2 is completed, so after the uniformity measurement of the fifth tire 2 is completed on the left side line The rotating drum 42 that has moved to the center of both lines moves to the measurement block 22 on the right line that has been prepared for measurement at that time, and enters the uniformity measurement of the sixth tire 2.
[0090]
Thereafter, if there is no uniformity correction in both lines, the control procedure is the same as that shown in FIG.
As described above, if the uniformity is corrected on one line and the flow may be stagnant, the other line that has finished the uniformity measurement is ready for the uniformity measurement first, and the rotation moved to the center of both lines. The drum 42 returns to the same line again without wasteful movement or standby, and the uniformity measurement can be performed, and the uniformity measurement can be efficiently continued on the other line until one line returns.
[0091]
When the uniformity of the tire supported by the rim shaft of one line is being corrected by the grinder mechanism, the uniformity of the tire supported by the other rim shaft can be measured. Uniformity measurement in this line does not stagnate, and uniformity measurement correction work can be performed efficiently.
[0092]
In the example of FIG. 9, the uniformity correction is performed on the right line, but the present invention is also applicable to cases where maintenance is performed due to other troubles, accuracy confirmation work, prototype measurement, or the like is performed.
As shown in FIG. 8, when the tires flowing through both lines are flowing smoothly without the need for uniformity correction by the grinder mechanism, the uniformity measurement is performed on the other line while the uniformity measurement is performed on one line. Therefore, even a single rotating drum can move between the two lines alternately to perform work efficiently.
[0093]
In this embodiment, the independent motors 31 are used to rotate the tires 2 held by the upper and lower rims 3 and 4. However, even with a single motor, a drive pulley is connected to the drive shaft via a clutch. If power is transmitted to each rim shaft by the provided belt, it is possible to drive and control the tires on the left and right lines separately by controlling the clutch.
[0094]
An example in which the rim exchanging device 60 in the above embodiment is simplified will be described with reference to FIGS.
In the measurement block of the transfer conveyor 80, a lower rim shaft 82 that is moved up and down by a rim lifting cylinder 81 is arranged with a lower rim base 83 at the upper end below a portion where a roller is divided into right and left and a gap is formed in the center. Above this, an upper rim shaft 85 is vertically opposed to have an upper rim base 86 having a magnet at the lower end.
[0095]
A rim transfer plate 90 is guided by guide rails 87 along the lower surface of the transfer conveyor 80 and supported so as to be movable back and forth. The rim transfer plate 90 is moved back and forth by driving a cylinder 88. Move.
The rim transfer plate 90 is a plate member having an oval shape in a plan view, and cylindrical portions 90a and 90b that are flat in the front and rear directions protrude upward to form a circular opening.
[0096]
Different types of rims are supported on the front and rear cylindrical portions 90a and 90b of the rim transfer plate 90 in a state where the upper and lower rims 91 and 92 are overlapped.
When the rim transfer plate 90 is in the front position, the central axis of the rear cylindrical portion 90b coincides with the axes of the upper and lower rim shafts 82 and 85, and when the rim transfer plate 90 is in the rear position, the front cylindrical portion 90a The central axis coincides with the axes of the upper and lower rim axes 82 and 85.
[0097]
As shown in FIG. 10, a rim transfer plate 90 is supported below the transfer conveyor 80 in a state where the upper rim 91 and the lower rim 92 are stacked on the front and rear cylindrical portions 90a and 90b, and either the front or rear rim is used. This can be selected by driving the cylinder 88.
When one rim is selected and the rim lifting cylinder 81 is driven to raise the lower rim base 83, the lower rim base 83 penetrates the cylindrical portion 90a or 90b to support the upper and lower rims 91 and 92 from below. Raise.
[0098]
When the upper rim 91 is in contact with the upper rim base 86, the magnet is excited to attract the upper rim 91 to the upper rim base 86 and the lower rim base 83 is lowered, so that the upper rim 91 is left above. In this state, the lower rim 92 is separated downward, and is positioned above and below the transfer conveyor 80 as shown in FIG. 11, so that the tire 2 is conveyed and positioned by the transfer conveyor 80 and stops.
[0099]
When the lower rim base 83 is raised from the state shown in FIG. 11, the lower rim base 83 supports and lifts the tire 2 via the lower rim 92, and the upper rim 91 adsorbed by the upper rim base 86 is tire 2 on the upper rim 91. And is supported at a predetermined height position so that the tire 2 is sandwiched between the upper and lower rims 91 and 92 as shown by a two-dot chain line in FIG.
[0100]
In this state, the tire 2 is rotated by the rotational drive of the upper rim shaft 85, the rotating drum 95 is pressed from the side to measure the uniformity, and correction by the grinder is performed.
[0101]
When the measurement or the like is finished, if the lower rim base 83 is lowered, the tire 2 is lowered together, the tire 2 is placed on the transfer conveyor 80 in the middle, and the lower rim base 83 is separated from the tire 2 and further lowered.
Thus, the tire 2 is transported downstream by the transfer conveyor 80 after the uniformity measurement.
[0102]
At the time of rim replacement, the lower rim base 83 rises while supporting the lower rim 92 and picks up the upper rim 91. When the upper and lower rims 91 and 92 overlap, the magnet of the upper rim base 86 is demagnetized and the upper rim 91 is demagnetized. If the lower rim 92 is supported and lowered, the state returns to the state shown by the solid line in FIG. 9, so that the type of rim can be changed by moving the rim transfer plate 90 in the front-rear direction.
[0103]
If the rim transfer plate is further elongated and the cylindrical portion is increased, three or more types of rims can be exchanged.
[Brief description of the drawings]
FIG. 1 is a plan view in which a part of a tire uniformity measuring apparatus according to an embodiment of the present invention is omitted.
FIG. 2 is a side view of the same.
FIG. 3 is a front view seen from the downstream side of the measurement block.
FIG. 4 is a partially omitted perspective view of a measurement block.
FIG. 5 is a side view showing a grinder mechanism.
FIG. 6 is a plan view of the same.
FIG. 7 is a perspective view of a principal part of the rim exchanging device, partially omitted.
FIG. 8 is a view showing a timing chart of measurement of tire uniformity.
FIG. 9 is a timing chart showing an example of measurement and correction of tire uniformity.
FIG. 10 is a cross-sectional view of a rim replacement device according to another embodiment.
FIG. 11 is a cross-sectional view of the rim exchanging device in another state.
FIG. 12 is a plan view of a rim transfer plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Tire uniformity measurement correction device, 2 ... Tire, 3 ... Upper rim, 4 ... Lower rim, 5 ... Pallet,
10 ... Stock conveyor, 11 ... Tire identification device, 12 ... Sorting device, 13 ... Drop port, 14 ... Curve roller conveyor,
20 ... Transport conveyor, 21 ... Centering block, 22 ... Measurement block, 23 ... Transport block,
25 ... Upper rim shaft, 26 ... Lower rim shaft, 27 ... Marking device, 29 ... Post,
30 ... support frame, 31 ... servo motor, 32 ... grinder mechanism, 33 ... oscillating member, 34 ... support shaft, 35 ... servo cylinder, 36 ... motor, 37 ... grinder, 38 ... chain, 39 ... lifting motor,
40 ... rail, 41 ... rectangular frame, 42 ... rotating drum, 43 ... hydraulic cylinder, 45 ... load cell,
50 ... Sorting conveyor, 51, 52 ... Roller conveyor, 53 ... Rope conveyor,
60 ... Rim changing device, 61 ... Elevating rim storage shelf, 62 ... Mounting conveyor, 63 ... Motor, 64 ... Slider, 65 ... Support rail, 66 ... Screw shaft, 67 ... Motor, 68 ... Timing belt,
70 ... Transfer device, 71 ... Cylinder, 72 ... Holding arm,
74 ... Table lifter, 75 ... Rim conveyor, 76 ... Transfer cylinder,
80: transfer conveyor, 81: rim lifting cylinder, 82 ... lower rim shaft, 83 ... lower rim base, 85 ... upper rim shaft, 86 ... upper rim base, 87 ... guide rail, 88 ... cylinder,
90 ... Rim transfer plate, 91 ... Upper rim, 92 ... Lower rim, 95 ... Rotating drum.

Claims (2)

The tires can be supported and rotated by the rim shafts provided in the opposite halfway of the two-line parallel transfer conveyors for transferring the tires, and the rotating drum disposed between the rim shafts on the left and right lines In the tire uniformity measurement method for detecting the load state while moving together and pressing against the tire supported on the rim shaft of the one line and rotating together,
When the uniformity measurement of one tire supported on the rim shaft of one line is completed, the rotating drum is moved to the center of both lines, and then moved to a line ready for uniformity measurement before moving to the rim of the line. While measuring the uniformity of the tire supported by the shaft ,
Uniformity correction by a grinder mechanism provided on the opposite side of the rotating drum with each transfer conveyor sandwiched between the left and right transfer conveyors and uniformity measurement by the rotating drum can be controlled simultaneously on each line. Tire uniformity measurement method. A two-line transfer conveyor parallel to the left and right to transfer the tires;
A rim shaft that is provided at a midway point opposite to each other on the left and right transfer conveyors and that supports and rotates the tire by upper and lower rims;
A rotating drum that is arranged between the rim shafts of the left and right lines and moves in the left and right direction to detect the load state while rotating against the tire supported by the rim shaft of the one line;
When the uniformity measurement of one tire supported on the rim shaft of one line is completed, the rotating drum is moved to the center of both lines, and then moved to a line ready for uniformity measurement before moving to the rim of the line. Control means for controlling to perform uniformity measurement of the tire supported on the shaft;
A grinder mechanism provided on the opposite side of the rotating drum with each transfer conveyor sandwiched between the left and right transfer conveyors,
The tire uniformity measuring apparatus characterized in that the control means can simultaneously control uniformity measurement by the rotating drum and uniformity correction by the grinder mechanism on each line .

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