JP2019119466A - Green cover collecting device and bar code label pasting method - Google Patents

Abstract

To provide a green cover collecting device and a bar code label pasting method capable of pasting a bar code label onto a green cover with high precision at a predetermined position, so that phase aligning of the green cover can be performed with high precision, and repositioning and scrapping of the bar code label can be suppressed.SOLUTION: The green cover collecting device for moving a molded green cover to a position immediately below a bar code label pasting device comprises an extendable free roller and control means for controlling extension and contraction of the free roller, and includes a cover taking-over arm which supports the green cover from an inside of a torus with the free roller of an extension state, and rotation stop means disposed at a position facing an end portion of a rotation shaft of the free roller to stop rotation of the free roller. The rotation stop means is a stopper which approaches the rotation shaft of the free roller and stops the rotation of the free roller by pressing the rotation shaft of the free roller with a predetermined pressing force.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a raw cover taking-off device for taking a raw cover formed by laminating tire constituent materials and a bar code attaching method for attaching a barcode using the raw cover taking-out device.

  In general, a pneumatic tire is manufactured by forming a green cover by bonding tire constituent materials on a forming drum and then vulcanizing and forming the green cover, but the green cover in which a molding failure occurs in the molding process is used as it is. If it is vulcanized, it will be judged as a defective product at the stage of quality inspection later, and it will be necessary to discard it as scrap, resulting in a decrease in productivity.

  Therefore, conventionally, in the final step of molding, bar information in which product information such as tire size, materials used, time distribution required for molding, molding information such as worker name are registered in the molded raw cover A code is attached and quality assurance is performed for the subsequent steps (for example, Patent Document 1).

  FIG. 2 is a view for explaining the process of taking out the molded raw cover from the molding machine and moving it immediately below the bar code sticking apparatus, and proceeds in the order of (A) to (C). In FIG. 2, reference numeral 1 denotes free rollers (two in FIG. 2) constituting a cover taking arm, and the two free rollers 1 are axially telescopically controlled by a control box CB. And 10 is a cover extraction arm, T is a formed raw cover, B is a bar code sticking device.

  As shown in FIG. 2A, the molded raw cover T is taken out of the molding machine by the cover taking out arm 10, and is supported by the cover taking out arm 10 and conveyed toward the cover taking out arm.

  The transported raw cover T is delivered from the cover takeout arm 10 to the free roller 1 of the cover takeoff arm as shown in FIG. 2 (B). Specifically, by covering the raw cover T supported by the cover takeout arm 10 over the two free rollers 1 axially extended by the control of the control box CB, the raw cover T is a cover taking arm Picked up to the free roller 1.

  Thereafter, as the two free rollers 1 are retracted to their original positions, the picked-up raw cover T moves to the position immediately below the bar code sticking device B as shown in FIG. Do.

  After that, the worker can apply a free roller so that the bar code can be attached to a predetermined position on the circumference of the raw cover T, specifically, a position near the joint portion (SW / J portion) of the sidewall. While being stretched over 1, the raw cover T is appropriately rotated and stopped. Then, the barcode pasting device B is used to paste the barcode at a predetermined position on the circumference of the stopped raw cover T.

  The raw cover after the barcode is attached is then transferred to the internal appearance inspection table while being stretched over the free roller 1, and while the operator rotates the raw cover, the raw cover Visually inspect whether there is any abnormality in inner appearance and appearance (inner appearance) on the circumference.

  FIG. 3 is a view for explaining the movement of the free roller in the cover taking arm, in which (A) is a front view and (B) is a side view, as shown in FIG. 3 (A). While rotating in the same direction, as shown in FIG. 3 (B), it freely expands and contracts in the axial direction according to the control of the control box CB.

Patent No. 4680270 gazette

  However, in the case of the conventional method described above, since the bar code is pasted while the raw cover is stretched over the free roller 1, vibration of the device etc. is added to the heavy cover (20 kg or more) In addition, the rotation of the free roller on which the raw cover is bridged is affected, causing the raw tire that has been stopped to rotate, which may cause the bar code sticking position to shift.

  As described above, if the application position of the bar code is deviated, the phasing in the vulcanization process can not be performed with high accuracy, and the product tire has variation in uniformity.

  That is, in the vulcanization process, which is the next process, the orientation of the raw cover is matched every time and the uniformity is stabilized by putting it into the press (phase alignment). The position where the bar code is attached is the position where the bar code is attached. Therefore, if the attachment position of the bar code is shifted, the phasing in the vulcanization process can not be performed with high accuracy, and the product tire suffers from variation in uniformity.

  FIG. 4 is a view for explaining the phasing of the green cover, and a plate on which the figure is drawn is displayed near the vulcanizing device. First, the operator aligns the position where the bar code is attached with the position of the arrow, inserts it into the vulcanizing apparatus, and presses it to measure RH1 (an index for evaluating uniformity). Next, the raw cover is shifted by 90 degrees, 180 degrees, 270 degrees, and 90 degrees, and the same pressing is performed to measure RH1. After that, the raw cover is placed (phased) such that the portion of the measured RH 1 with the smallest RH 1 comes to a predetermined position.

  By performing this operation for each of the continuously molded green covers, and continuously vulcanizing the in-phase green tires, it is possible to provide a stable uniformity product tire. However, if the application position of the bar code is deviated, it is not possible to perform the phase alignment in the vulcanization process with high accuracy, and thus the product tire may have unevenness of uniformity.

  In addition, when the sticking position of the bar code is shifted, and as shown in FIG. 5, when sticking at a position overlapping the SW / J portion instead of the position near the SW / J portion, the bar during vulcanization molding Since the code may be wrinkled or the bar code may be covered with rubber, the bar code has to be re-applied, causing a work loss associated with the re-application of the bar code, and the product tire can not be attached again. There is also a risk of scrapping.

  Therefore, the present invention can attach the barcode to the raw cover with high accuracy at a predetermined position, and can perform phasing of the raw cover at the time of vulcanization with high accuracy. It is an object of the present invention to provide a raw cover pick-up device and a bar code sticking method capable of suppressing the generation of waste and scrap.

  As a result of intensive studies to solve the above-mentioned problems, the present inventor has found that the above-mentioned problems can be solved by the invention described below, and has completed the present invention.

The invention according to claim 1 is
A raw cover take-up device used when taking a molded raw cover from a cover removal arm and moving it immediately below a bar code sticking device,
An extendable free roller and control means for controlling the extension and contraction of the free roller are provided, and in a state in which the free roller is extended, the green cover is pulled from the cover takeout arm and put on the free roller With the cover taking over arm which passes,
And a rotation stop unit disposed at a position facing the end of the rotation shaft of the free roller to stop the rotation of the free roller.
The rotation stopping means is a stopper for stopping the rotation of the free roller by pressing the rotation shaft of the free roller with a predetermined pressing force in proximity to the rotation shaft of the free roller. It is a raw cover pick-up device.

The invention according to claim 2 is
The rotation stopping means includes raising and lowering means for moving up and down toward the rotation axis of the free roller, and is disposed below the rotation axis of the free roller,
The raw cover pulling apparatus according to claim 1, characterized in that the pressing on the free roller is started or released when the rotation stopping means is moved up and down by the moving up and down means.

The invention according to claim 3 is
An uneven tooth portion is formed on the periphery of the end portion of the rotation shaft of the free roller.
An uneven tooth portion corresponding to the tooth portion formed at the end of the rotation shaft of the free roller is formed in a semicircular shape at a position facing the end of the rotation shaft of the free roller of the rotation stopping means Yes,
It is comprised so that rotation of the said free roller may be stopped by mutual engagement of two tooth parts, It is a raw cover taking-off apparatus of Claim 1 or Claim 2 characterized by the above-mentioned.

The invention according to claim 4 is
It is a raw cover pulling-out apparatus according to claim 3, wherein the pitch of the unevenness in the two tooth portions is 1.0 to 5.0 mm.

The invention according to claim 5 is
The rotation stopping means includes control means for controlling the pressing force at the time of pressing the rotating shaft of the free roller close to the rotating shaft of the free roller to 0.2 to 0.4 MPa. It is a raw cover withdrawal device according to any one of claims 1 to 4.

The invention according to claim 6 is
The said free roller is two or more free rollers, It is a raw cover taking over apparatus of any one of the Claims 1 thru | or 5 characterized by the above-mentioned.

The invention according to claim 7 is
The raw cover taking-up apparatus according to any one of claims 1 to 6 is used to withdraw the molded raw cover from the cover taking-out arm, and a barcode is placed at a predetermined position on the circumference of the raw cover. It is a bar code sticking method to stick,
A raw cover taking-up step of taking over the molded raw cover from the cover taking-out arm over the extended free roller of the cover taking-out arm;
A raw cover moving step of retracting the free roller on which the raw cover is bridged and moving the raw cover to a position immediately below a barcode attaching device;
A bar code sticking position adjusting step of rotating the raw cover that has moved and adjusting a predetermined bar code sticking position;
A sticking position fixing step of stopping the rotation of the raw cover whose bar code sticking position has been adjusted by stopping the rotation of the free roller using the rotation stopping means, and fixing the sticking position of the bar code;
And a barcode attaching step of attaching a barcode by using a barcode attaching device at a barcode attaching position of the raw cover whose rotation is stopped.

The invention according to claim 8 is
The sticking position fixing step is a step of stopping the rotation of the free roller by raising the rotation stopping means toward the free roller and pressing the end of the rotation shaft of the free roller. It is the barcode sticking method of Claim 7 characterized by the above-mentioned.

The invention according to claim 9 is
The sticking position fixing step engages the uneven teeth formed on the periphery of the end of the rotating shaft of the free roller with the uneven teeth formed on the rotation stopping means. It is a process of stopping rotation of the said free roller, It is a barcode sticking method of Claim 7 or 8 characterized by the above-mentioned.

The invention according to claim 10 is
The sticking position fixing step is a step of stopping the rotation of the free roller by applying a pressing force of 0.2 to 0.4 MPa to the rotating shaft of the free roller by the rotation stopping means. It is the barcode sticking method of any one of Claim 7 thru | or 9 characterized by these.

The invention according to claim 11 is
The barcode attaching method according to any one of claims 7 to 10, which is applied to attaching a barcode on a raw cover of a 12 to 21 inch rim diameter PC / LT category tire. .

  According to the present invention, it is possible to attach the barcode to the raw cover with high accuracy at a predetermined position, to perform phasing of the raw cover at the time of vulcanization with high accuracy, and to attach the barcode again. It is possible to provide a raw cover pick-up device and a bar code sticking method capable of suppressing the generation of waste and scrap.

It is a figure explaining the stopper in one embodiment of the present invention. It is a figure explaining the process in which the formed raw cover is conveyed from a molding machine to a bar code sticking device. It is a figure explaining a motion of a cover taking over arm. It is a figure explaining phasing of a raw cover. It is a figure explaining the sticking position of a barcode.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The raw cover pulling device according to the present embodiment is the same as the conventional raw cover pulling device in that the molded raw cover is pulled from the cover removal arm and moved to the position immediately below the bar code sticking device. That is, the raw cover take-up device according to the present embodiment also includes the flexible free roller and the control means for controlling the expansion and contraction of the free roller, and extends the free roller from the cover takeout arm to the raw cover. It has a cover take-off arm that takes over and rolls over the free roller. However, the present embodiment is characterized in that rotation stop means (stopper) for stopping the rotation of the free roller of the cover taking arm is provided.

  FIG. 1 is a view for explaining the stopper in the present embodiment, and (A) is a perspective view showing a state where the rotation of two free rollers is stopped by the stopper, and (B) is one of them. It is a part expansion perspective view, and (C) is a figure showing typically the relation between a stopper and a cover taking arm (free roller).

  As shown in FIG. 1, in the present embodiment, a stopper 4 is disposed below the rotation axis of each of the two free rollers 1. In addition, although the number of free rollers is not limited, in consideration of deformation of the unvulcanized raw cover T, two or more are preferable.

  The stopper 4 has raising and lowering means for moving up and down to the free roller 1, and the stopper 4 ascends and approaches the rotation shaft of the free roller to press the rotation shaft of the free roller 1 with a predetermined pressing force. By doing this, the rotation of the free roller 1 can be stopped.

  At this time, on the circumference of the end portion of the rotation shaft of the free roller 1, a concavo-convex tooth portion is formed as the locking portion 2, and the stopper 4 is locked at a position facing the locking portion 2 It is preferable that an uneven tooth portion corresponding to the tooth portion of the portion 2 is formed in a semicircular shape as the locking portion 3.

  While the two free rollers 1 pull the raw cover T from the cover extraction arm and move the raw cover T directly below the bar code sticking device, the stopper 4 is lowered and stands by at a predetermined position. When the raw cover T moves to the position directly below the bar code sticking device, the stopper 4 ascends and the locking portion 3 and the locking portion 2 engage with each other, whereby the rotation shaft of the free roller 1 is fixed. The rotation of the free roller 1 is stopped, and the rotation of the raw cover T is also stopped accordingly.

  After that, the point that the barcode is pasted using the barcode pasting device B at a predetermined position on the circumference of the raw cover T whose rotation has been stopped is the same as in the prior art, but in the present embodiment, the free roller 1 Because the rotation shaft of is fixed, the vibration of the device is prevented from affecting the rotation of the free roller even if it is applied to the high-weight raw cover, and the raw cover does not rotate. .

  As a result, the bar code can be attached at a predetermined position on the circumference of the green cover with high accuracy, the phasing in the vulcanization process can be performed with high accuracy, and variations in uniformity of the product tire can be sufficiently suppressed. Can supply stable quality product tires. In addition, since the bar code is not attached to the position overlapping the SW / J portion, the risk of work loss and scrap of the product tire associated with the bar code reattachment can be sufficiently reduced. .

  And since the pressing force to the free roller is released by lowering the stopper and moving it away from the rotating shaft of the free roller, the raw cover after the bar code is attached becomes rotatable again, and the conventional cover Similarly, the raw cover can be rotated to inspect the internal appearance.

  In the present embodiment, it is preferable that the pitch of the unevenness in the tooth portions of the locking portion 2 and the locking portion 3 be 1.0 to 5.0 mm. If the pitch is too small, the rotational axis of the free roller can not be sufficiently fixed, and the sticking position of the bar code may be shifted. On the other hand, when the pitch is too large, the play becomes large, and there is a possibility that the rotary shaft of the fixed free roller moves and the sticking position of the bar code is shifted.

  Moreover, it is preferable that the pressing force with respect to the rotating shaft of the free roller of the raised stopper is 0.2-0.4 Mpa. If the pressing force is too small, the engagement of the uneven teeth of the locking portions 2 and 3 with each other may be soft, and the rotating shaft of the fixed free roller may move to shift the sticking position of the bar code. . On the other hand, if the pressing force is too large, the tips of the concave and convex tooth portions of the locking portions 2 and 3 mesh with each other, and the rotation axis of the free roller moves during operation, causing the bar code sticking position to shift. There is a fear.

  By using the raw cover taking-up device according to the present embodiment, as described above, the barcode can be attached with high precision to a predetermined position on the circumference of the raw cover.

  As a specific barcode attaching method, first, as in the conventional case, the formed raw cover is stretched from the cover taking-out arm over the extended free roller of the cover taking-out arm and taken off (raw cover taking-up process).

  Next, the free roller on which the raw cover is hung is retracted and the raw cover is moved to the position immediately below the barcode attaching device (raw cover moving step).

  Next, the raw cover that has moved is rotated to adjust the bar code sticking position to be a predetermined position (near the SW / J section) (bar code sticking position adjustment step). The respective steps up to this point are basically the same as in the prior art.

  Next, by stopping the rotation of the free roller using the rotation stopping means, the rotation of the raw cover whose bar code sticking position is adjusted is stopped, and the bar code sticking position is fixed (sticking position fixing step). The point in which this process is provided is a feature of the barcode attaching method according to the present embodiment.

  That is, as described above, by using the rotation stopping means, the rotation shaft of the free roller is fixed, and the vibration of the apparatus is prevented from affecting the rotation of the free roller even if it is applied to the heavy cover. Therefore, the raw cover does not rotate until the application of the barcode is completed. As a result, the bar code can be attached to a predetermined position on the periphery of the green cover with high accuracy, and the phasing in the vulcanization process can be performed with high accuracy, and the bar code is overlapped with the SW / J portion. Can be prevented from being stuck.

  Then, after the application of the barcode is completed, the rotation stop of the free roller is released, and the inside appearance is inspected as in the conventional case.

  In addition, the effect in this Embodiment mentioned above can exhibit an especially remarkable effect, when it applies to the affixing of the barcode in the raw cover of PC / LT category tire with a rim diameter of 12 to 21 inches.

  Hereinafter, the present invention will be more specifically described based on examples.

  The raw cover was conveyed using the raw cover conveying apparatus provided with the cover taking-off arm of Experimental Examples 1 to 6 in each specification shown in Table 1.

  Specifically, using each raw cover conveying device, a molded green tire (weight: about 20 kg) having a tire size of 285 / 60R18 was conveyed to stick a bar code (each of 600 pieces).

  Experimental Example 1 is a conventional raw cover transfer device having no stopper. And experiment example 2 is a raw cover conveyance device in which an uneven tooth part is not formed although there is a stopper. And experiment example 3-6 is the raw cover conveying apparatus which provided the uneven tooth part in the end part of the rotating shaft of a free roller, and a stopper, and changed the pitch of the unevenness in a tooth part, and the pressure to a free roller. is there.

  In the evaluation, first, the sticking deviation amount of the bar code was measured at the deviation angle with respect to the reference position, and the degree of the sticking deviation of the bar code was evaluated. The greater the sticking deviation amount, the greater the variation in uniformity of the product tire.

  Next, the frequency (%) was determined by counting the number of times the bar code was attached to the SW / J part, shifting from the reference position near the SW / J part. The smaller the size, the more accurate the barcode is attached.

  The results are shown in Table 1.

  In the case of Experimental Example 1, since there is no stopper, the free roller of the take-off arm rotates and the bar code sticking position shifts every time, resulting in a large sticking shift amount of ± 30 degrees, and the variation of uniformity becomes large. . Moreover, the frequency of sticking of the barcode to the SW / J part is as high as 2.0%, and the tires discarded as scrap increase.

  In the case of Experimental Example 2, by using a stopper having no unevenness, the sticking displacement amount is from ± 30 degrees to ± 10 degrees and the sticking frequency of the barcode to the SW / J part is 2 as compared with Experimental Example 1. .0% to 1.0%, but both are reduced, but since the free roller of the take-off arm can not be sufficiently fixed only by applying the stopper, the bar code affixing position may be deviated, and uniformity Can not be sufficiently suppressed. In addition, it is not sufficient to reduce the frequency with which the barcode is attached to the SW / J section, and the generation of tires discarded as scrap can not be avoided.

  In the case of Experimental Example 3, the sticking deviation amount of the bar code is reduced more than ± 3 degrees, but since the unevenness pitch is wide and the play is large, the free roller of the take-off arm moves even after fixing, and the bar code sticking still Positional displacement has occurred, and variation in uniformity can not be sufficiently suppressed. In addition, although the frequency at which the bar code is attached to the SW / J portion is further reduced to 0.5%, it is not sufficient yet, and the generation of tires discarded as scrap can not be avoided.

  In the case of Experimental Example 4, the displacement of the barcode attachment position and the frequency at which the barcode is attached to the SW / J part are further reduced compared to Experimental Example 3, but since the pressing force is low, the pulling arm is free Fixing of the locking portion of the roller becomes sweet, the rotation shaft moves, and a deviation of the bar code attachment position occurs, and the variation of uniformity can not be sufficiently suppressed. Moreover, the reduction of the frequency with which the bar code is attached to the SW / J part is not sufficient yet, and the generation of tires discarded as scrap can not be avoided.

  In the case of Experimental Example 5, the displacement of the barcode attachment position and the frequency at which the barcode is attached to the SW / J part are further reduced compared to Experimental Example 3, but because the pressing force is high, the pulling arm is free The protrusions are engaged with each other at the locking portion of the roller, the rotation shaft moves, and the displacement of the bar code attachment position occurs, so that the variation in uniformity can not be sufficiently suppressed. Further, the reduction in the frequency with which the bar code is attached to the SW / J part is not sufficient yet, and the generation of tires discarded as scrap can not be avoided.

  In the case of Experimental Example 6, the concavities and convexities of the locking portions are firmly engaged with each other, so that the free roller of the take-off arm can be sufficiently fixed, and the barcode can be attached with high accuracy to a certain position. Also, no barcode is pasted on the SW / J section.

  From the above results, by using the stopper for the free roller of the take-off arm, the sticking displacement amount and the sticking frequency of the bar code to the SW / J part are reduced compared to the prior art, but to reduce more sufficiently. It was confirmed that it is necessary to properly control the uneven pitch and the pressing force.

  As mentioned above, although the present invention was explained based on an embodiment, the present invention is not limited to the above-mentioned embodiment. Various modifications can be made to the above embodiment within the same and equivalent scope of the present invention.

Reference Signs List 1 free roller 2, 3 locking portion 4 stopper 10 cover takeout arm B bar code sticking device CB control box T raw cover SW / J portion side wall joint portion

Claims (11)

A raw cover take-up device used when taking a molded raw cover from a cover removal arm and moving it immediately below a bar code sticking device,
An extendable free roller and control means for controlling the extension and contraction of the free roller are provided, and in a state in which the free roller is extended, the green cover is pulled from the cover takeout arm and put on the free roller With the cover taking over arm which passes,
And a rotation stop unit disposed at a position facing the end of the rotation shaft of the free roller to stop the rotation of the free roller.
The rotation stopping means is a stopper for stopping the rotation of the free roller by pressing the rotation shaft of the free roller with a predetermined pressing force in proximity to the rotation shaft of the free roller. Raw cover pick-up device. The rotation stopping means includes raising and lowering means for moving up and down toward the rotation axis of the free roller, and is disposed below the rotation axis of the free roller,
The raw cover pulling apparatus according to claim 1, characterized in that the pressing on the free roller is started or released by raising and lowering the rotation stopping means by the raising and lowering means. An uneven tooth portion is formed on the periphery of the end portion of the rotation shaft of the free roller.
An uneven tooth portion corresponding to the tooth portion formed at the end of the rotation shaft of the free roller is formed in a semicircular shape at a position facing the end of the rotation shaft of the free roller of the rotation stopping means Yes,
The raw cover pulling apparatus according to claim 1 or 2, wherein rotation of the free roller is stopped by engagement of two teeth with each other.   The raw cover pulling apparatus according to claim 3, wherein the pitch of the unevenness in the two teeth is 1.0 to 5.0 mm.   The rotation stopping means includes control means for controlling the pressing force at the time of pressing the rotating shaft of the free roller close to the rotating shaft of the free roller to 0.2 to 0.4 MPa. The raw cover withdrawal device according to any one of claims 1 to 4, wherein   The said free roller is two or more free rollers, The raw cover taking-up apparatus of any one of the Claims 1 thru | or 5 characterized by the above-mentioned. The raw cover taking-up apparatus according to any one of claims 1 to 6 is used to withdraw the molded raw cover from the cover taking-out arm, and a barcode is placed at a predetermined position on the circumference of the raw cover. It is a bar code sticking method to stick,
A raw cover taking-up step of taking over the molded raw cover from the cover taking-out arm over the extended free roller of the cover taking-out arm;
A raw cover moving step of retracting the free roller on which the raw cover is bridged and moving the raw cover to a position immediately below a barcode attaching device;
A bar code sticking position adjusting step of rotating the raw cover that has moved and adjusting a predetermined bar code sticking position;
A sticking position fixing step of stopping the rotation of the raw cover whose bar code sticking position has been adjusted by stopping the rotation of the free roller using the rotation stopping means, and fixing the sticking position of the bar code;
A barcode attaching method comprising the step of attaching a barcode by using a barcode attaching device at a barcode attaching position of the raw cover whose rotation has been stopped.   The sticking position fixing step is a step of stopping the rotation of the free roller by raising the rotation stopping means toward the free roller and pressing the end of the rotation shaft of the free roller. The barcode sticking method according to claim 7 characterized by the above.   The sticking position fixing step engages the uneven teeth formed on the periphery of the end of the rotating shaft of the free roller with the uneven teeth formed on the rotation stopping means. The barcode sticking method according to claim 7 or 8, which is a step of stopping rotation of the free roller.   The sticking position fixing step is a step of stopping the rotation of the free roller by applying a pressing force of 0.2 to 0.4 MPa to the rotating shaft of the free roller by the rotation stopping means. The barcode sticking method according to any one of claims 7 to 9, characterized in that   11. The barcode attaching method according to any one of claims 7 to 10, which is applied to attaching a barcode on a raw cover of a PC / LT category tire having a rim diameter of 12 to 21 inches.

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