JP2000218714A - Method and apparatus for automatically removing defective part of rubber coating member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically remove the defective part of a rubber coating member not only to reduce the load of a worker but also to enhance productivity. SOLUTION: A process for detecting the defective part of a rubber coating member between an extruder 13 and a cutter 20, a process for changing over a cutting train 1 from a usual cutting cycle to a defective part removing cutting cycle when the defective part is detected, a process cutting the defective part by the cutter in the removing cutting cycle, a process removing the cut defective part to the outside of the cutting train 1 and a process returning the cutting train 1 from the removing cutting cycle to the usual cutting cycle after the defective part is removed are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a creel-directed cutting train for producing a tire component by sequentially cutting and joining rubber-coated members obtained by coating rubber on a steel cord or a textile cord unwound from a creel. And a method and apparatus for removing a defective portion of a rubber coating member.

[0002]

2. Description of the Related Art In a cutting train directly connected to a creel, a line is stopped when a trouble occurs in equipment downstream of the cutting machine. However, an extruder for coating a rubber with a cord cannot be stopped immediately, but is slightly stopped after the line is stopped. Stop operation with delay. For this reason, when the extruder stops, the extruded rubber-coated portion rises in a dumpling shape to form a thick portion.

Further, even if the extruder is coated with rubber while controlling the head pressure, there may be a case where the rubber amount is insufficient and the width of the rubber coating member where the embedded cord is exposed and the width of the rubber coating member are disturbed for some reason. Conventionally, the defective portion such as a thick portion or a rubber bald portion of the rubber coating member as described above,
Before entering the cutting machine body, the operator visually identifies it and removes it with a tool or performs marking in the subsequent process,
I was trying to get rid of it.

[0004]

Therefore, while the line is in operation, the operator must constantly monitor the work, and the work of removing the defective portion itself is not so simple and time-consuming.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to automatically remove a defective portion of a rubber coating member to reduce a burden on an operator and improve productivity. Another object of the present invention is to provide a method and an apparatus for automatically removing a defective portion of a rubber coating member.

[0006]

In order to achieve the above object, the present invention provides a rubber coated member by coating a plurality of cords unwound from a creel while extruding rubber with an extruder. In the method of removing a defective portion of a rubber coating member in a creel directly-connected cutting train for manufacturing a tire component by cutting and sequentially joining the coating member with a cutting machine, the rubber coating member between the extruder and the cutting machine A step of detecting a defective portion, a step of switching the cutting train from a normal cutting cycle to a removal cutting cycle for removing the defective portion when the defective portion is detected, and a step of cutting the defective portion by the cutting machine in the removal cutting cycle. Removing the defective portion outside the cutting train and after removing the defective portion And defective parts automatic method for removing rubber coating member that includes a step of returning a sectional train from removing cutting cycle in the normal cutting cycle.

When a defective portion of the rubber coating member is detected between the extruder and the cutting machine, the cutting train is switched from the normal cutting cycle to the removal cutting cycle, and the defective portion is cut and cut by the cutting machine under the removal cutting cycle. By removing it outside the train and returning to the normal cutting cycle, it is possible to detect defective parts of the rubber coating member and remove it automatically, reducing the burden on workers and improving productivity Can be.

According to a second aspect of the present invention, a rubber-coated member is formed by coating a plurality of cords unwound from a creel while extruding rubber with an extruder, and the rubber-coated member is cut by a cutting machine and sequentially joined. Detecting means for detecting a defective portion of a rubber coating member between the extruder and the cutting machine in a creel-directed cutting train for manufacturing a tire component member, and a normal cutting cycle and a defective portion of the cutting train. Cycle switching means for switching between a cutting and a cutting cycle for removing a defective portion, a removing means for removing a cut defective portion outside the cutting train,
Control means for controlling the cycle switching means and the removing means, wherein the control means operates the cycle switching means in response to a detection signal of the detecting means to switch from a normal cutting cycle to a removal cutting cycle, To cut the defective part, operate the removing means to remove the defective part, and operate the cycle switching means to control the defective cutting part of the rubber coating member to return to the normal cutting cycle. It is a removal device.

The control means operates the cycle switching means in response to the detection signal of the detection means to switch from the normal cutting cycle to the removal cutting cycle, operates the cutting machine to cut the defective portion, and operates the removal means to operate the defective portion. Is controlled to return to the normal cutting cycle, so that the defective portion of the rubber coating member is automatically detected and removed, thereby reducing the burden on the operator and improving the productivity. .

According to a third aspect of the present invention, there is provided the apparatus for automatically removing a defective portion of a rubber coating member according to the second aspect.
The detection means is a thickness gauge for measuring a rubber gauge of the rubber coating member.

When a trouble occurs in equipment downstream of the cutting machine, a thick portion may be formed in the rubber coating member in a dumpling shape, and such a thick portion may be detected by a thickness gauge. it can.

According to a fourth aspect of the present invention, in the apparatus for automatically removing a defective portion of a rubber coating member according to the second aspect,
The detecting means is a rubber bald detecting means for detecting a rubber bald of a rubber coating member.

[0013] If the rubber coating member is short of the coating rubber due to some cause of the extruder and the rubber coating member is exposed, the rubber coating detecting means can detect the rubber coating.

According to a fifth aspect of the present invention, in the apparatus for automatically removing a defective portion of a rubber coating member according to the second aspect,
The detection means is a rubber width detection means for detecting a width length of the rubber coating member.

When the width of the rubber coating member is disturbed due to some cause of the extruder, the disturbance of the width can be detected by the rubber width detecting means.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic plan view of the entire cutting train 1 according to the present embodiment, FIG. 2 is a view taken in the direction of the arrow II in FIG. 1, and FIG.
Shown in

The steel cords 2 respectively unwound from the plurality of creels 11 of the creel stand are cord guides.
Aligned by 12 and inserted into the extruder 13. Extruder
In step 13, the steel cord 2 inserted is coated with rubber while controlling the head pressure to continuously form the belt-shaped rubber coating member 3.

The formed rubber coating member 3 is cooled by a cooling drum 14 and placed on a long transport table 16 via a festoon 15. Camera for photographing the rubber coating member 3 from above on the upstream side of the transport table 16
A thickness gauge 18 is provided at 17 and slightly downstream thereof.

The camera 17 is a CCD camera, and can detect a rubber bald having a cord exposed on the surface of the rubber coating member 3. That is, it is possible to determine the exposed code by performing image processing on a video image of the surface of the rubber coating member 3.

The thickness gauge 18 is used for the rubber coating member 3.
A roller rotating on the upper surface is provided at the tip of a swinging support bar, and a change in the rubber gauge (thickness) of the rubber coating member 3 can be detected by measuring the swing angle of the support bar.

The transfer table 16 is disposed so as to abut the belt conveyor 21 from an oblique direction of about 30 degrees to the side, and the front end surface of the transfer table 16 is about 30 degrees with respect to the traveling direction of the rubber coating member 3. At an angle of degrees, the left side edge of the upper belt of the belt conveyor 21 is opposed in parallel with some gap.

The guillotine-type cutter 20 descends from above into a gap between the front end surface of the transfer table 16 and the left side edge of the upper conveyor belt 24 of the belt conveyor 21, and the rubber coating member 3 bridged over this gap is moved. Can be cut at an angle of about 30 degrees.

The belt conveyor 21 includes a pair of front and rear rotating rolls 22 and 23, and a conveyor belt 24 is stretched over the pair of rotating rolls 22 and 23. A timing pulley 23a and an A
A timing belt 26 is stretched between a timing pulley 25a fitted to the drive shaft of the C servo motor 25,
By driving the AC servo motor 25, the conveyor belt 24 is rotated via the timing belt 26, and the cut rubber coating member 3 on the conveyor belt 24 can be moved.

At a place where the transfer table 16 and the belt conveyor 24 intersect, a drawer 30 for transferring the rubber coating member 3 from the transfer table 16 to the belt conveyor 21 is installed upward. The drawer device 30 supports the long plate-shaped vacuum pad 31 so that it can reciprocate between the upper part of the transport table 16 and the upper part of the extended conveyor belt 24 along the transport direction of the rubber coating member 3, It is suspended so that it can move up and down.

The vacuum pad 31 is lowered and adsorbed to the tip of the rubber coating member 3 on the transfer table 16 on which the tip is cut by the guillotine type cutter 20, pulled up while being adsorbed, and pulled out toward the conveyor belt 24 by a certain amount. The rubber coating member 3 can be moved and placed on the conveyor belt 24 by lowering it at a fixed position and releasing the suction.

The rubber coating member 3 is cut by the guillotine type cutter 20 in a state where the rubber coating member 3 is pulled out onto the conveyor belt 24 in a certain amount, and the cut rubber coating member 3 on the conveyor belt 24 has a parallelogram shape. A predetermined amount is conveyed by the belt conveyor 21 without. The amount of movement by the belt conveyor 21 is a predetermined distance slightly shorter than the width of the rubber coating member 3.

At approximately the same time as the movement by the belt conveyor 21, the vacuum pad 31 of the drawer 30 moves onto the transfer table 16, adsorbs the leading end of the subsequent rubber coating member 3, and pulls out a certain amount on the conveyor belt 24. Place.
The subsequent rubber coating member 3 which is placed later on the conveyor belt 24 where the preceding rubber coating member 3 has moved by a predetermined amount is placed so that its edges partially overlap, and the edges of each other are The overlapping portion is pressed and joined.

Pulling out the rubber coated member 3 described above,
One cycle of placing, joining, cutting, and moving a predetermined amount on the conveyor belt 24 is repeated, and the rubber coating members 3 which are sequentially cut are sequentially joined and the steel cord 2 is embedded in the bias. Is being manufactured. The above is the normal cutting cycle.

The cutting train 1 is provided with a removing device 40 for removing a defective portion of the rubber coating member 3 from a normal line. That is, the vacuum pad 31
The diagonally upstream side of the fixed position on the conveyor belt 24 on which the rubber coating member 3 is pulled out and placed, the thin flat squeeze plate 41 horizontally extends along the upper surface of the conveyor belt 24. It is arranged to be able to move back and forth in a direction perpendicular to the pull-out direction.

The squeeze plate 41 is fixed to the tip of a cylinder rod of a pair of air cylinders 42 and 43 installed in parallel, and advances by driving the air cylinders 42 and 43 to vacuum above a fixed position on the conveyor belt 24. The defective end member 5 which is inserted under the defective end member 5 which is a rubber coated member having a cut portion which is suction-supported and cut by the pad 31 is released, and the dropped end member 5 which has dropped by dropping can be scooped.

The defective end member 5 scooped by the squeeze plate 41 is moved to the upstream side when the squeeze plate 41 is retracted. A rodless cylinder 45 is erected in parallel with the vacuum pad 31 above the retracted movement position.
And extends obliquely outward from the upper side with respect to the transport direction.

A magnet 46 is provided on the slider of the rodless cylinder 45 so as to be movable up and down.
Can move up and down and between the position above the conveyor belt 24 and the position off to the right from the conveyor belt 24 by the rodless cylinder 45.

Accordingly, the magnet 46 descends and sucks the magnetic member 46 (attracts the steel cord 2 in the defective end member 5 by magnetic force) on the defective end member 5 on the squeeze plate 41 which has receded to the upstream side. By moving the outside of the conveyor belt 24 by the 45 and demagnetizing the magnet 46, the defective end member 5 can be removed outside the line.

The apparatus 40 for removing the defective end member 5 as described above
Is provided, and the defective end member 5 by the removing device 40 is provided.
Is removed from the normal cutting cycle for manufacturing the tire component 4 of the cutting train 1 and switched to a special removal cutting cycle.

In the cutting train directly connected to the creel as in the cutting train 1, if a trouble occurs in equipment downstream of the guillotine type cutter 20, the line stops.
Since the extruder 13 cannot be stopped immediately and stops operating slightly after the line is stopped, when the extruder 13 is stopped, the extruded rubber coating portion rises in a dumpling shape to form a thick portion.

The extruder 13 performs rubber coating while controlling the head pressure. However, the rubber surface may be lost for some reason, resulting in the occurrence of rubber baldness in which the embedded cord is exposed. It is the thickness gauge 16 and the camera 17 disposed above the transfer table 16 that detect the defective portion of the rubber coating member 3 as described above. Detects rubber baldness.

When the thickness gauge 16 or the camera 17 detects a defective portion, the cutting train 1 controlled by a computer is used.
Is controlled by switching from the normal cutting cycle to the removal cutting cycle. The process of the removal cutting cycle will be described below.

When the rubber coating member 3 is pulled out by the vacuum pad 31, the movement amount of the rubber coating member 3 is measured by a yard meter, and when the thickness gauge 16 and the camera 17 at a fixed position detect a defective portion. The length from the tip of the rubber coating member 3 to the defective portion can be measured.

In the case of the main cutting train 1, the length from the front end of the rubber coating member 3 to just before the defective portion is one time or two times the length of the rubber coating member 3 which is normally cut (the amount pulled out by the vacuum pad 31). It is twice as many and one or two normal rubber coated members 3 can be cut. Although the normal rubber coating member 3 is supplied to the tire component member 4, a defective portion is included in the length of the remaining rubber coating member 3 to be cut.

Therefore, when the vacuum pad 31 pulls out the remaining rubber-coated member 3, the length including the defective portion from the tip to the portion immediately after the vacuum pad 31 is pulled out, and the vacuum pad 31 is cut by the guillotine-type cutter 20 while the vacuum pad 31 is adsorbed. . Then, as shown in FIG.
Above the fixed position, the vacuum pad 31 sucks the defective end piece 5 having the defective portion.

Next, the air cylinders 42 and 43 are driven to move the squeeze plate 41 forward and insert it below the defective end member 5 adsorbed on the vacuum pad 31.
The defective end member 5 that has fallen due to the suction release
41 scoops (see FIG. 5).

Next, the squeeze plate 41 is retracted below the magnet 46 (see FIG. 5). Then, the magnet 46 is lowered to adsorb the defective end member 5 and rise (see FIG. 5), and is moved to the outside of the conveyor belt 24 by the rodless cylinder 45 to demagnetize the magnet 46. 5 can be removed outside the line.

When the magnet 46 is moved to the original position,
The conventional cutting and cutting cycle is returned to the normal cutting cycle, and thereafter, the normal tire component 4 is manufactured. As described above, the operation from the detection of the defective portion of the rubber coating member 3 to the removal of the defective end member 5 from the line is fully automated, thereby reducing the burden on the operator and improving the productivity. Can be.

When the line is stopped halfway, a thick portion is formed on the rubber coating member 3 and the operation of removing the thick portion has been troublesome for a conventional worker. However, since the removal of the thick portion is completely automated as described above and does not require the operator's hand, the line can be stopped halfway and the operation can be performed with a margin. Even if the size needs to be switched in the process after cutting, the line can be easily stopped, the switching operation can be easily performed, and the work load on the operator can be reduced.

The thickness gauge 18 is used for the rubber coating member 3.
The thick part is detected, but if it is thinner than the specified thickness, it can be detected as a defective part. Also camera
17 detects rubber bald, but the rubber coating member 3
Surface irregularities can be detected, and large irregularities can be removed as defective portions.

Further, the camera 17 can also measure the width of the rubber coating member 3, and a portion greatly different from the specified width can be detected as a defective portion and can be removed. The width of the rubber coating member 3 can be measured by a line sensor, and the interval between a pair of members sandwiching the rubber coating member 3 from the left and right in the width direction on the transport table 16 is measured by a potentiometer or the like. You may.

The rubber baldness of the rubber coating member 3 can also be detected by an energization method in which a metal brush is brought into contact with the surface of the rubber coating member 3 and, when it comes into contact with the exposed steel cord 2, electricity is applied.

Although the energization method cannot be applied to a rubber-coated member in which a textile cord is coated with a rubber, a camera method can detect rubber baldness, and the present invention can be applied to a rubber-coated member in which such a textile code is embedded. Applicable.

The magnet 46 of the removing device 40 is an electromagnet. However, a permanent magnet can be used if there is a separate peeling device, and a vacuum pad can be used instead of the magnet.

The return of the squeeze plate 41 may use a reciprocating motion such as a crank system. Further, the defective end member may be taken out from above by using a magnet conveyor to adsorb the defective end member.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of an entire cutting train according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of the arrow II in FIG.

FIG. 3 is a view taken in the direction of the arrow III in FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 1;

FIG. 5 is an explanatory diagram sequentially showing main steps in a removal cutting cycle.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cutting train, 2 ... Steel cord, 3 ... Rubber coating member, 4 ... Tire constituent member, 5 ... Defective end member, 11 ... Creel, 12 ... Cord guide, 13 ... Extruder, 14
... cooling drum, 15 ... festoon, 16 ... transport table,
17 ... Camera, 18 ... Thickness gauge, 20 ... Guillotine cutter, 21 ...
Belt conveyor, 22, 23 ... rotating roll, 24 ... conveyor belt, 25 ... AC servomotor, 26 ... timing belt,
30 ... drawing device, 31 ... vacuum pad, 40 ... removal device,
41… Squeeze plate, 42, 43… Air cylinder, 45… Rodless cylinder, 46… Magnet.

Claims (5)

[Claims] 1. A rubber component is formed by coating a plurality of cords unwound from a creel while extruding rubber with an extruder, forming a rubber coated member, cutting the rubber coated member by a cutter, and sequentially joining the rubber coated members. In the method for removing a defective portion of a rubber coating member in a cutting train directly connected to a creel, a step of detecting a defective portion of the rubber coating member between the extruder and the cutting machine, and cutting the defective portion when the defective portion is detected. A step of switching the train from a normal cutting cycle to a removal cutting cycle for removing a defective portion, a step of cutting the defective portion by the cutting machine in the removal cutting cycle, and a step of removing the cut defective portion outside the cutting train; After the defective part is removed, the cutting train is removed. Process and the defective portion automatic method for removing rubber coating member comprising the back to. 2. A rubber component is formed by coating a plurality of cords unwound from a creel while extruding rubber with an extruder to form a rubber coating member, cutting the rubber coating member with a cutter, and sequentially joining the rubber coating members. In the cutting train directly connected to the creel, detecting means for detecting a defective portion of the rubber coating member between the extruder and the cutting machine, a normal cutting cycle of the cutting train and a removal cutting cycle for removing the defective portion Switching means for switching between the first and second cutting means, removing means for removing the cut defective portion outside the cutting train, and control means for inputting a detection signal of the detecting means to control the cutting train, the cycle switching means and the removing means. The control means operates the cycle switching means according to a detection signal of the detection means. Usually switch to remove cutting cycle from the cutting cycle, and operating the cutter defective portion is cut, the defective portion is removed by operating the removal means Te,
An apparatus for automatically removing a defective portion of a rubber-coated member, wherein the cycle switching means is operated to control to return from a removal cutting cycle to a normal cutting cycle. 3. The apparatus according to claim 2, wherein said detecting means is a thickness gauge for measuring a rubber gauge of said rubber coated member. 4. The apparatus according to claim 2, wherein said detecting means is a rubber bald detecting means for detecting a rubber bald of the rubber coated member. 5. The apparatus according to claim 2, wherein the detecting means is a rubber width detecting means for detecting a width length of the rubber coated member.