JP2013086264A - Under-tread sticking apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an under-tread sticking apparatus capable of automatically correcting failure of centering of an under-tread and finely adjusting centering of the under-tread by automatically performing a positional adjustment of a knife.SOLUTION: The under-tread sticking apparatus includes: a pair of knives for forming the under-tread with a predetermined width by cutting both right and left ends of the under-tread; a knife moving means; a first camera; a second camera; a means for determining a shift direction and a shift quantity of the center position of the under-tread before cutting to the center position of the tread by calculating the center position of the tread by a photographed image of the first camera and calculating the center position of the under-tread by a photographed image of the second camera; a means for moving a pair of knives based on the shift direction and the shift quantity and cutting the under-tread into a predetermined width; and a means for sticking the under-tread to the tread under a condition that respective center positions coincide with each other.

Description

  The present invention relates to an undertread application device for attaching an undertread to a tread of a pneumatic tire.

  In recent years, pneumatic tires having a radial structure excellent in wear resistance and handling stability during high-speed traveling have been widely used. A tread that constitutes a part of such a pneumatic tire is extruded and conveyed by a conveyor, and an undertread is supplied and pasted to the back side (inside of the tread in the tire radial direction) during conveyance (Patent Document) 1).

  In this way, when the undertread is pasted on the back side of the tread, the position of the undertread pasting becomes important. That is, the undertread is cut to a predetermined width with a knife and then attached to the back side of the tread. However, it is necessary to match the center position of the undertread cut to the predetermined width with the center position of the tread.

JP 2009-279890 A

  When pasting the under tread on the tread, the position where the under tread was pasted was manually adjusted by visual confirmation by the operator. If the adjustment work was missed, the centering was poor and the adjustment was delayed. There was a problem that the productivity deteriorated.

  In addition, since the conventional undertread application device does not have a function of detecting the undertread application position, an operator periodically checks the application position during the operation of the device and makes fine adjustments. . For this reason, when an appropriate check is delayed, there is a problem that a large amount of defective products are generated and production loss is caused.

  In view of the above problems, the present invention automatically improves the productivity by eliminating the centering failure by automatically matching the center position of the undertread with the center position of the tread. It is an object of the present invention to provide an undertread application device that can eliminate production loss due to an appropriate check delay by automatically performing the check.

The invention described in claim 1
An undertread pasting device for pasting an undertread having a predetermined width on a tread being conveyed in a state where the center position in the width direction of the undertread is matched with the center position in the width direction of the tread,
A pair of knives arranged at the same interval as the predetermined width, and cutting the left and right ends of the undertread to form the undertread of a predetermined width;
Knife moving means for moving the pair of knives in the width direction of the undertread;
A first camera for photographing the surface of the tread;
A second camera for photographing the surface of the undertread before cutting;
Both end positions in the width direction of the tread are detected from the captured image of the first camera, the center position of the tread is calculated from the detected both end positions, and the width of the undertread is determined from the captured image of the second camera. And detecting the center position of the under tread before cutting from the detected both end positions, and the shift direction and the shift of the center position of the under tread before cutting with respect to the center position of the tread. An error identification means for identifying the quantity;
An undertread cutting means for driving the knife moving means to move the pair of knives based on the shift direction and shift amount specified by the error specifying means, and cutting the undertread into a predetermined width;
An undertread pasting device, comprising: a pasting means for pasting the undertread on the tread in a state where the center position in the width direction of the undertread is aligned with the center position in the width direction of the tread. It is.

  The present invention automatically adjusts the position of the knife for centering to eliminate centering defects and improve productivity, and also performs periodic centering checks and fine adjustment of centering automatically. Thus, it is possible to provide an undertread application device that can improve productivity.

It is a side view showing typically an undertread sticking device of an embodiment of the invention. It is the arrow line view which looked at the principal part of FIG. 1 from the direction of arrow A. It is a system configuration figure of an undertread sticking device of an embodiment of the invention. It is a flowchart figure for showing the procedure of the automatic centering of the under tread of the under tread sticking device of an embodiment of the invention.

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

  FIG. 1 is a side view schematically showing an undertread application device according to an embodiment of the present invention. FIG. 2 is an arrow view of the main part of FIG. FIG. 3 is a system configuration diagram of the undertread application device according to the embodiment of the present invention.

  As shown in FIG. 1, the undertread application device conveys the tread 9 in the direction of arrow b and the take-away conveyor 12 that conveys the tread 9 formed by the molding machine 15 in the direction of arrow c. An affixing roller (affixing means) 12c for affixing the undertread 10 to the conveyor 14, the camera 1 (first camera), the light source 1, the camera 2 (second camera), the light source 2, and the back surface of the tread 9. And an undertread UT widening knife 13 composed of a pair of knives.

  The takeaway conveyor 12 includes a carry-in roller 12a and a carry-out roller 12b.

  The UT widening knife 13 is used to cut both ends of the undertread 10 to form the undertread 10 having a predetermined width. The UT widening knife 13 is arranged so as to be movable in the width direction of the undertread 10 by a knife moving means (not shown) in a state where the two knives are kept at a predetermined interval, and the interval between the two knives is appropriately changed. It can be done. The knife moving means includes a motor and a moving mechanism for moving the UT widening knife 13 by the rotational driving force of the motor.

  The light source 1 is disposed below the take-away conveyor 12 at a position where light can be emitted to the back surface of the tread 9 from the gap 12d between the carry-out side rollers 12b. The camera 1 is installed at a position corresponding to the light source 1 above the take-away conveyor 12, and an image of the outer shape of the tread 9 (first photographed image) can be obtained by irradiation with light from the light source 1.

  The light source 2 is arrange | positioned in the position which can irradiate light to the under tread 10 before a cutting | disconnection. The camera 2 can obtain an image of the outer shape of the undertread 10 (second photographed image) by the reflected light of the light emitted from the light source 2 at the undertread 10.

  As shown in FIG. 2, in the centering, when the off-center amount (distance from the reference position to the center) of the tread 9 is C1, and the off-center amount of the undertread 10 is C2, the arithmetic expression is ΔC = C1− When the amount of deviation ΔC is calculated as C2, and the amount of deviation is positive (ΔC> 0), the pair of UT widening knives 13 are moved to the left in the drawing while maintaining the distance between the two knives. When the deviation amount is negative (ΔC <0), the pair of UT widening knives 13 are moved rightward in the drawing while maintaining the interval between the two knives.

  In order to perform the centering as described above, as shown in FIG. 3, the under-tread pasting apparatus has an image controller 3, a tread line PLC (Programmable Logic Controller) 4, and upper conditions (tread width, tread width, And an image processing system including a personal computer (PC) 7 for inputting an undertread width or the like to the tread line PLC4.

  Then, the image controller 3 takes in the image of the outer shape of the tread 9 (first photographed image) by the camera 1 and the image of the outer shape of the undertread 10 (second photographed image) by the camera 2, and transfers them from the image controller 3 to the tread line PLC4. The width and off-center position data of the tread 9 and the width and off-center position data of the undertread 10 are transmitted. Thereafter, in the tread line PLC4, both end positions in the width direction of the tread 9 are detected from the first captured image based on the reference position, and the center position of the tread 9 is calculated from the detected both end positions.

  Similarly, both end positions in the width direction of the undertread 10 are detected from the second photographed image, and the center position of the undertread 10 before cutting is calculated from the detected both end positions.

  Thereafter, the shift direction and shift amount of the center position of the undertread 10 before cutting with respect to the center position of the tread 9 are calculated.

  Thereafter, a signal is output from the tread line PLC4 to the driving circuit of the knife moving means based on the deviation direction and the deviation amount, and the UT widening knife 13 is moved rightward or leftward by the knife moving means to make the UT widening knife. By adjusting the position of 13, the undertread 10 whose center position matches the center position of the tread can be cut to a predetermined width.

  The image controller 3 also transmits an image controller state signal to the tread line PLC 4 for failure detection.

  Further, signals for on / off control of the light source 1 and the light source 2 are also output from the tread line PLC4.

  Next, a specific procedure of automatic centering of the undertread by the undertread application device will be described with reference to FIG.

  FIG. 4 is a flowchart showing an automatic centering procedure of the undertread application device according to the embodiment of the present invention.

  As a precondition for performing automatic centering of the undertread 10, the image information of the camera 1 and the camera 2 is constantly updated by scanning the tread line PLC4, and the width and off-center position of the tread 9 and the undertread 10 obtained from the image information. It is necessary to confirm that is normal.

  It is also necessary to confirm that there is no data abnormality due to equipment failure and that the automatic control function is activated.

(Step 1)
In step 1, the camera 1 acquires a captured image of the tread 9 (see FIG. 1) conveyed to a position below the camera 1, thereby changing the state where there is no tread 9 on the takeaway conveyor 12. Detect that. Thereby, the centering adjustment work of the undertread 10 (see FIG. 1) is started. Alternatively, the centering adjustment operation may be started by turning on the automatic centering start push button (PB).

(Step 2)
In step 2, the off-center amounts C1 and C2 of the tread 9 and the undertread 10 are obtained from the shooting data of the camera 1 and the camera 2 while N1 seconds have elapsed since the start of the automatic centering was turned on.

(Step 3)
In step 3, the shift amount ΔC is calculated based on the arithmetic expression (ΔC = C1−C2) of C1 and C2 obtained based on the imaging data obtained by the cameras 1 and 2.

(Step 4)
In step 4, it is determined whether or not the deviation amount is positive, and a control signal is output to the control circuit of the knife moving means. Note that a dead zone is prepared in advance in order to avoid malfunctions caused by the visual field of the cameras 1 and 2 and the light sources 1 and 2 being blocked by the operator.

(Steps 5 and 6)
If ΔC> 0 in step 4, the process proceeds to step 5 in which the UT widening knife 13 moves to the left by the shift amount ΔC. If ΔC <0 in step 4, the process proceeds to step 6 in which the UT widening knife 13 moves to the right by the amount of deviation ΔC. When ΔC = 0, automatic centering is completed.

(Step 7)
After the movement of the pair of knives 13 is completed, in step 7, if the processing from step 3 to step 6 is not repeated N2 times, a signal to return to step 3 is issued, and a signal repeated N2 times is obtained. The automatic centering of the undertread is completed when

(Step 8)
When returning from step 7 to step 3, in step 8, after passing the tread 9 or the under tread 10 by the length of ΔCN3m, the amount of deviation (ΔC) is calculated again, and the position of the UT widening knife 13 is determined. Adjustments are made. Thus, stable and accurate centering can be performed by repeating the position adjustment.

(Effect of this embodiment)
According to the present embodiment, the image controller 3 and the tread line PLC4 are provided together with the two cameras, and the shift direction and the shift amount ΔC from the off-center amount C1 of the tread 9 and the off-center amount C2 of the undertread 10 are provided. And a signal relating to the displacement direction and the displacement amount ΔC is output from the tread line PLC4 to the drive circuit of the knife moving means and the position of the UT widening knife 13 is adjusted to match the center position with the center position of the tread. The undertread can be cut to a predetermined width.

  Thus, since the center position of the under tread can be automatically matched with the center position of the tread, the centering failure can be eliminated and the productivity can be improved.

  Further, since the periodic check of the centering and the fine adjustment of the centering can be automatically performed by detecting the shift direction and the shift amount ΔC even during the operation of the undertread application device, the productivity can be further improved. Can do.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment. Various modifications can be made to the above-described embodiment within the same and equivalent scope as the present invention.

3 Image controller 4 Treadline PLC
7 PC 9 Tread 10 Undertread 12 Take-away conveyor 12a Carry-in side roller 12b Carry-out side roller 12c Pasting roller 12d Clearance 13 UT widening knife (a pair of knives)
14 Conveyor 15 Molding machine

Claims (1)

An undertread pasting device for pasting an undertread having a predetermined width on a tread being conveyed in a state where the center position in the width direction of the undertread is matched with the center position in the width direction of the tread,
A pair of knives arranged at the same interval as the predetermined width, and cutting the left and right ends of the undertread to form the undertread of a predetermined width;
Knife moving means for moving the pair of knives in the width direction of the undertread;
A first camera for photographing the surface of the tread;
A second camera for photographing the surface of the undertread before cutting;
Both end positions in the width direction of the tread are detected from the captured image of the first camera, the center position of the tread is calculated from the detected both end positions, and the width of the undertread is determined from the captured image of the second camera. And detecting the center position of the under tread before cutting from the detected both end positions, and the shift direction and the shift of the center position of the under tread before cutting with respect to the center position of the tread. An error identification means for identifying the quantity;
An undertread cutting means for driving the knife moving means to move the pair of knives based on the shift direction and shift amount specified by the error specifying means, and cutting the undertread into a predetermined width;
An undertread pasting device, comprising: a pasting means for pasting the undertread on the tread in a state where the center position in the width direction of the undertread is aligned with the center position in the width direction of the tread. .

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