JPH05208725A - Method and device for feeding member constituent of tire - Google Patents

Abstract

PURPOSE:To perform reliable regulation of the length of a belt-like material constituent of a tire when the belt-like material is judged to be shorter than the peripheray of a tire molding drum before the material is fed to the drum. CONSTITUTION:A carrier conveyor 2 is provided with a first grasping contact- bonding unit 14 movable together with the carrier conveyor 2 or stopped alone and sucking and holding the under surface Wa of the tip of a belt-like material W constituent of a tire and a second grasping contact-bonding unit 15 for sucking and holding the under surface Wb of the rear end of the belt-like material W. Sensors at the tip and the rear end part for measuring the length of the belt-like material W are installed at intervals of a given distance. When the length is judged to be short, the speed of the conveyor is reduced to a value lower than the peripheral velocity of a tire molding drum 1 to stretch the belt- like material W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for supplying a tire-constituting strip-shaped material, and more particularly to a tire-constituting strip-shaped material such as a side tread which is cut substantially corresponding to the circumferential length of a tire forming drum. However, when it is determined that it is shorter than the circumferential length of the tire forming drum, it relates to a method and a device for supplying a tire forming belt-shaped material that can be accurately attached to the drum of the tire forming machine while adjusting the length of the tire forming belt-shaped material. It is a thing.

[0002]

2. Description of the Related Art Conventionally, as a device for supplying and pasting a tire-constituting strip-shaped material, which has been cut substantially corresponding to the circumferential length of a tire-forming drum, to a tire-forming drum, for example, Japanese Patent Laid-Open No. Sho 63-63.
-256430. In this strip material sticking device, the top surface of the tip end of the supplied strip material is sucked and held by a sandwiching means provided with a sandwiching pad, conveyed to a forming drum, and is stuck and crimped by a crimping means. When winding the strip-shaped material, the sandwiching means provided with the sandwiching pad sucks and holds the strip-shaped material up to the vicinity of the completion of winding the strip-shaped material in a state where the upper surface of the rear end of the strip-shaped material is sucked and held.

[0003]

By the way, in the pasting device for the strip-shaped material as described above, when supplying the front end and the rear end of the strip-shaped material to the forming drum, the upper surface of the front end and the rear end of the strip-shaped material is sandwiched by a sandwiching pad. Since it was supplied while alternately holding and adsorbing by one sandwiching means equipped with, there is a problem that the control for supplying is extremely complicated and the work efficiency is poor, and the leading end and the rear end of the strip-shaped material are Since the part is not held to the position where the forming drum is attached, there is a problem that the front end and the rear end of the band-shaped material may be deformed, and it is difficult to abut and attach with high accuracy.

Further, the belt-shaped material constituting the tire such as the side tread which is extruded is cut in advance so as to substantially correspond to the circumferential length of the tire-forming drum before molding, but shrinks as the belt-shaped material constituting the tire cools. There is a problem in that the width direction of the band-shaped material is not uniform, and this is further promoted when rubbers having different compositions are combined in the width direction. For this reason, even if the drum is cut substantially in accordance with the circumferential length of the drum, the size of the tire becomes small when it is attached to the tire forming drum, and since the gap is not constant in the width direction, the operator does not fix the rear end side of the tire-constituting strip-shaped material. There has been a problem that the work of sticking while pulling has to be performed, the front end and the rear end of the tire-constituting strip-shaped material cannot be stuck accurately, and the work efficiency is extremely poor.

The present invention has been devised in view of the above-mentioned conventional problems. Before the belt-shaped material constituting the tire, which is cut substantially corresponding to the circumferential length of the tire forming drum, is supplied to the tire forming drum. When it is determined that the length is shorter than the circumference of the tire building drum, by adjusting the length of the tire-constituting strip-shaped material, it is possible to always stick with high accuracy, which can significantly improve the work efficiency and improve the productivity. It is an object of the present invention to provide a method and an apparatus for supplying a tire-constituting strip-shaped material capable of achieving the above.

[0006]

In order to achieve the above-mentioned object, the present invention is provided below a tire forming drum with a conveyer conveyer for conveying the strip material constituting the tire cut to the tire forming drum. Tip side,
A pressure raising / lowering means for raising and lowering toward the tire forming drum side is provided, and the front end portion and the rear end portion of the tire constituent strip-shaped material being conveyed are detected above the conveyor, and the length of the tire constituent strip-shaped material is detected. Install the front end detection sensor and the rear end detection sensor to measure the
A first gripping and crimping unit that can move together with the transport conveyor or can be stopped independently, and that holds the front and bottom surfaces of the tire-constituting strip-shaped material by suction; An arithmetic and control unit which is provided with the gripping and crimping unit and the rear end pressing unit, and which compares and calculates the measured length of the tire-constituting strip-shaped material and the circumferential length of the tire forming drum in the front end detection sensor and the rear end detection sensor. And connecting the arithmetic and control unit to the drive unit of the conveyor.

[0007]

The present invention is configured as described above, and when the tire-constituting strip-shaped material is conveyed from the upstream side onto the conveying conveyor, the first gripping and crimping unit causes the tire-constituting strip-shaped material to move toward the tip end side. Are sucked and held, and sandwiched in this state. Along with the driving of the transport conveyor, the tip end portion of the tire-constituting strip-shaped material is moved to the tire forming drum side by a predetermined amount and cut by a cutting device, and then the rear end side of the tire-constituting strip-shaped material is combined with the second gripping and crimping unit. A tire structure which is sandwiched by end holding means and is further arranged on the conveyor at a predetermined interval during the step of conveying the leading end of the belt material constituting the tire to the lower pressure-bonding position of the tire forming drum by driving the conveyor. The length of the tire-constituting strip-shaped material is measured by the front end detection sensor of the strip-shaped material and the rear end detection sensor, and the measured value is compared and calculated with the circumferential length of the tire forming drum. Next, when the conveyor belt is swung to press the tip end of the belt-shaped material onto the drum and wind the tire-constituting belt-shaped material around the peripheral surface of the tire forming drum, the length of the tire-constituting belt-shaped material is shorter than the peripheral length of the tire forming drum. In this case, the tire configuration is such that the feeding speed of the conveyor is slower than the peripheral speed of the tire forming drum in accordance with the difference distance, so that the second gripping and crimping unit and the rear end pressing means sandwich the tire. By pulling the entire band-shaped material, and affixing the front end and the rear end of the tire-constituting band-shaped material to each other,
It is possible to always perform a highly accurate pasting work and improve workability and productivity.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of a supply device for supplying a tire-constituting strip-shaped material W such as a side tread according to the present invention to a tire forming drum 1, and FIG. 2 is a half sectional view taken along the line AA of FIG. The feeding device is provided below the tire building drum 1 with a carrying conveyor 2 for carrying the tire-constituting strip-shaped material W that has been cut into a predetermined length in a manner substantially corresponding to the circumferential length of the tire building drum 1.

On the conveying conveyor 2, the front end and the rear end of the tire constituent strip material W being conveyed are detected, and the length L of the tire constituting strip material W is detected by the pulse count of the encoder. A front end detection sensor Pa such as a photoelectric tube for measurement and a rear end detection sensor Pb are installed at a predetermined interval. The toothed conveyor belt 3 of the transport conveyor 2 is endlessly wound around a head pulley 5a, a drive pulley 5b, and a plurality of guide pulleys 5c arranged in front of and behind the conveyor frame 4 to form a drive pulley. 5b is driven to rotate by the drive motor 6. Further, the front end detection sensor Pa and the rear end detection sensor Pb are the measured length L of the belt-shaped material W constituting the tire.
And the peripheral length of the tire forming drum 1 are connected to an arithmetic control device (not shown) for comparison and calculation. The arithmetic control device is connected to the drive device 6 (drive motor) of the conveyor 2.

The conveyor frame 4 is mounted on a base frame 8 via a plurality of guide rails 7 arranged in a direction orthogonal to the longitudinal direction of the transport conveyor 2 as shown in FIG. Therefore, the conveyor frame 4 can move in a direction orthogonal to the longitudinal direction of the transport conveyor 2, and a pair of guides mounted on the base frame 8 in parallel with the longitudinal direction of the transport conveyor 2. Rail L
A rodless cylinder S, which is also installed on the base frame 8 via x, can move forward and backward with respect to the tire building drum 1.

The base frame 8 is installed on a rocking base 11 mounted on a frame 9, and the rocking base 11 is mounted on the rocking base 11.
The base end portion 11a of the swing base 11 is rotatably supported by a support shaft 12 provided on the pedestal 9, and the tip end portion 1 of the swing base 11 is
1b is connected to a rod 13a of an oscillating cylinder 13, which is a pressure-bonding lifting means attached to a gantry 9. Therefore, the tip side of the transport conveyor 2 has a swing cylinder 13
By the expansion and contraction operation of (1), it is possible to move up and down with respect to the tire building drum 1.

A first gripping and crimping unit 14 which can move or stop together with the transport conveyor 2 and which adsorbs and holds the tip lower surface Wa of the tire-constituting strip-shaped material W, and the tire-constituting strip-shaped belt. A second gripping and crimping unit 15 for adsorbing and holding the rear end lower surface Wb of the material W is provided. Since the first gripping and crimping unit 14 and the second gripping and crimping unit 15 have exactly the same configuration, the configuration of the first gripping and crimping unit 14 will be described, and the description of the second gripping and crimping unit 15 will be omitted. Omit it.

As shown in FIGS. 2 and 3, the first gripping and crimping unit 14 has slide rails 16a and 16b parallel to each other on the conveyor frame 4 which is installed at a position opposite to each other on the base frame 8. The slide rails 16a, 16b are installed on the slide blocks 17a, 1
Support frames 19a and 19b in which vertical support plates 18a and 18b are suspended to face each other via 7b are slidably mounted. Support plates 18a, 1 facing each other
Two shafts 20a and 20b are rotatably supported on the upper portion of 8b via a bearing member 20 at predetermined intervals and in parallel. The shafts 20a and 20b are provided with urethane flanges 21a and 21b at both ends. Pulley 22 provided with
a and 22b are fixed via a collar 21 and a key 23.

A support plate 18 supported by the frame 10 below the center between the shafts 20a and 20b.
A shaft 25 is rotatably supported by a and 18b via a bearing 24, and a toothed pulley 27 is fixed to the shaft 25 by a key 26. Brake devices 28a and 28b for stopping the rotation of the toothed pulley 27 and free rotation are fixed to both ends of the shaft 25 protruding from the support plates 18a and 18b.

Adsorption holding means 30 for adsorbing and holding the tip lower surface Wa of the belt-shaped material W constituting the tire is arranged substantially in the center between the shafts 20a and 20b.
Is an ascending / descending means 31a, 31b such as an ascending / descending cylinder fixed to the upper side surfaces of the support plates 18a, 18b.
And a mounting plate 33 mounted on the rods 32 of the elevating means 31a and 31b, and a vacuum suction pad 34 mounted on the mounting plate 33 at a predetermined interval. The upper end of 34 is a belt-shaped material W constituting the tire conveyed on the toothed conveyor belt 3.
It is located near the lower surface of. Further, in FIG.
And 36 are pulleys 22a, 22b and toothed pulley 2
7 is a flange for preventing the meandering provided in 7.

Above the suction holding means 30 of the second gripping and crimping unit 15, the rear end pressing means 40 for holding the rear end portion of the belt material W constituting the tire with the suction holding means 30.
As shown in FIGS. 4 to 6, the rear end pressing means 40 is installed on the conveyor frame 4 arranged in parallel on the left and right sides through the linear guide 41 and the base 42 to form the tire constituent strip material W. Air cylinders 43 that hold down the rear ends of the air cylinders 43 are installed, and a contact plate 44 is provided upright at the tip of a rod 43a of the air cylinder 43.

Further, on each of the air cylinders 43,
A pair of left and right bearing bearings 47 that rotatably support the pin 46 via the base plate 45 are installed, and a proximal end portion of a rear end pressing arm 48 is rotatably supported by the pin 46. Further, one end of a connecting arm 50 is connected to a base end portion of the rear end pressing arm 48 via a pin 49, and the other end of the connecting arm 50 is connected to the abutting plate 44 provided upright with a ball joint 51. Are connected via.

A rear end pressing plate 52 is attached to the front end portions of the pair of left and right rear end pressing arms 48. The rear end pressing plate 52 extends each air cylinder 43 to extend the rear end pressing arm 48. 6 is pivoted around the pin 46 and the pin 49 provided on the connecting arm 50 as a fulcrum as shown in FIG. 6, the rear end crimped to the rod of the cylinder (not shown) attached to the mounting plate 33. The position is set so as to correspond to the block 53.

Next, a method of supplying the tire-constituting strip-shaped material W to the tire forming drum 1 will be described with reference to FIGS. First, when the tire-constituting strip-shaped material W is supplied onto the transport conveyor 2 in a state where the vacuum suction pads 34 of the first gripping and crimping unit 14 and the second gripping and crimping unit 15 are not operating. , As shown in FIG.
The plurality of vacuum suction pads 34 of the grip pressure bonding unit 14 act to suction the tip lower surface Wa of the belt material W constituting the tire. Then, the brake devices 28a, 2 of the shaft 25 provided with the toothed pulley 27 of the first grip crimping unit 14
8b is actuated to lock the toothed pulley 27, the plurality of vacuum suction pads 34 of the second grip crimping unit 15 are not actuated, and the brake device (not shown) is not actuated. Has become. Therefore, the toothed pulley of the second grip crimping unit 15 is in a free state.

In this state, when the transport motor 2 is rotationally driven by the drive motor 6, as shown in FIG.
The first gripping and crimping unit 14, which adsorbs and holds the tip lower surface Wa of the tire-constituting strip-shaped material W, moves together with the transport conveyor 2, and stops when it moves a predetermined distance corresponding to the circumferential length of the tire forming drum 1. .. Therefore, the tire-constituting strip-shaped material W is cut to a fixed size by a cutting device (not shown). The transport conveyor 2 and the first gripping crimping unit 14 are again moved to the tire forming drum 1 side, and when the rear end Wb reaches the second gripping crimping unit 15, it is stopped.

The plurality of vacuum suction pads 34 of the second grip pressure bonding unit 15 are actuated to suck the rear end lower surface Wb of the tire-constituting strip-shaped material W, and the air cylinders 43 of the rear end pressing means 40 are extended. The rear end pressing plate 52 of the rear end pressing arm 48 and the rear end crimping block 53 clamp the rear end of the tire-constituting strip-shaped material W. Then, when the brake devices 28a and 28b are also operated, the toothed pulley is in a locked state, and the first gripping and crimping unit 14 and the second gripping and crimping unit 15 cause the front lower surface Wa and the rear lower surface Wb of the tire-constituting strip-shaped material W. In the state of sucking and holding, the transport conveyor 2 moves to the lower pressure-bonding position of the tire forming drum 1 as well. When the tip of the tire-constituting strip-shaped material W passes through the tip-detecting sensor Pa, the tip-detecting sensor Pa starts measuring the length of the tire-constituting strip-shaped material W.

Specifically, as shown in FIG. 7, when the tip portion of the tire-constituting strip-shaped material W shields the optical axis of the tip detection sensor Pa, the encoder starts counting pulses.
The rear end portion of the tire-constituting strip-shaped material W has a rear end detection sensor Pb.
Continue counting until you pass. When the rear end portion of the tire-constituting strip-shaped material W has passed the rear end detection sensor Pb,
Counting by the front end detection sensor Pa is stopped, and the counted encoder pulse number is output to the arithmetic and control unit to be converted into a length, which is set to a preset distance La between the front end detection sensor Pa and the rear end detection sensor Pb. , The actual length (Lz) of the tire-constituting strip-shaped material W that is conveyed by adding (La + Lx) the distance Lx converted by the arithmetic and control unit
It is what

From this state, with respect to the tire forming drum 1 which is rotationally driven in a predetermined direction, the tip end side of the conveying conveyor 2 is actuated by the rocking cylinder 13 to be lifted, and the tip end of the belt material W constituting the tire. Stick the parts by pressure. Figure 1
As shown in 0, when the tire-constituting strip-shaped material W starts to be wound around the tire building drum 1, the brake devices 28a and 28b of the first grip pressure-bonding unit 14 are unlocked, and the toothed pulley 27 is free. State, while
The second grip / crimp unit 15 includes a belt-shaped material W constituting the tire.
The rear end portion Wb is suction-held and the rear end pressing arm 4
The rear end portion of the tire-constituting material W is sandwiched between the rear end pressing plate 52 and the rear end press-bonding block 53. In this state, the transport conveyor 2 moves and the tire forming drum 1 Move to the side.

At this time, when it is determined that the actual length (Lz) of the tire-constituting strip-shaped material W is shorter than the circumferential length of the tire forming drum 1 as described above, it corresponds to the distance determined to be short. Then, the feed rate of the transport conveyor 2 is controlled by the arithmetic and control unit so as to be slightly slower than the peripheral speed of the tire forming drum 1. Then, as shown in FIG. 11, in the vacuum suction pad 34 and the rear end pressing means 40 of the second grip pressure bonding unit 15, the rear end portion Wb of the belt material W constituting the tire is wound around the tire forming drum 1, and The rear end portion Wb of the tire-constituting strip-shaped material W is held until just before the front end and the rear end of the tire-constituting strip-shaped material W are butted against each other. As a result, the cut tire-constituting strip material W
Is shorter than the circumference of the tire building drum 1,
The belt material W constituting the tire is surely stretched evenly over the entire length and is corrected so that the front end portion Wa and the rear end portion Wb of the belt material constituting the tire W can be adhered with high precision without deformation. It is a thing.

Further, after the rear end portion is abutted against the front end portion of the tire-constituting strip-shaped material W, a plurality of rear end crimping blocks 53 arranged in the width direction are raised by a cylinder to firmly crimp the joint portion by the abutting. This ensures a reliable joint size. Further, when the winding of the tire-constituting strip-shaped material W is completed, the braking devices 28 a, 2 of the first gripping and crimping unit 14 and the second gripping and crimping unit 15 are completed.
8b is actuated to lock each toothed pulley 27, and when the drive motor 6 is driven in the reverse direction, the conveying conveyor 2 and the first gripping crimping unit 14, the second gripping crimping unit 15, and the rear gripping crimping unit 15 The end holding means 40 is shown in FIG.
After returning to the position shown in, the process waits until the next tire constituent strip material W is supplied.

By repeating the above-mentioned operation, the front end portion and the rear end portion of the tire-constituting strip-shaped material W are not deformed, and moreover, the entire tire-constituting strip-shaped material W is uniformly stretched so that it can be manually handled. Without it, it can be accurately attached to the tire forming drum 1. Here, when the front end and the rear end of the tire-constituting strip-shaped material W are adsorbed to the first gripping and crimping unit 14 and the second gripping and crimping unit 15, respectively, the front and rear sides of the cutting line are kept pressed during the standard length cutting. The first grip crimping unit 1 without opening
It goes without saying that it is preferable to transfer it to the fourth gripping and crimping unit 15.

[0027]

The present invention is constructed as described above, and the tire-constituting strip-shaped material, which has been cut in advance substantially corresponding to the circumferential length of the tire forming drum, is provided around the tire forming drum before being supplied to the tire forming drum. When it is judged to be shorter than the length, by uniformly stretching the belt-shaped material constituting the tire and adjusting the length securely, it is possible to always stick with high accuracy, and it is possible to significantly improve the work efficiency and to improve the productivity. There is an effect that can be improved.

[Brief description of drawings]

FIG. 1 is a front view of a supply device that supplies a tire-constituting strip-shaped material according to the present invention to a tire building drum.

FIG. 2 is an enlarged half sectional view taken along the line AA of FIG.

3 is an enlarged view of a portion X in FIG. 1, and is a cross-sectional view taken along the line BB of FIG.

4 is an enlarged plan view taken along the line CC of FIG.

FIG. 5 is an enlarged front view of a rear end pressing unit.

FIG. 6 is an operation explanatory view of the rear end pressing means.

FIG. 7 is a front view of a supply device showing a method for measuring the length of a tire-constituting strip-shaped material.

FIG. 8 is an explanatory diagram showing a state in which the tip lower surface of the tire-constituting strip-shaped material is suction-held by the first gripping pressure bonding unit and counting is started by the tip detection sensor.

FIG. 9 is an explanatory diagram showing a state in which the lower surface of the tip end of the belt material constituting the tire is sucked and held by the first gripping pressure bonding unit and moved by a distance substantially corresponding to the circumferential length of the tire forming drum.

FIG. 10 is an explanatory view showing a state in which the length of a belt-shaped material constituting a tire is measured and then wound around a tire forming drum.

FIG. 11 is an explanatory diagram showing a state in which the winding of the tire-constituting strip-shaped material has been completed on the tire forming drum.

[Explanation of symbols]

1 Tire Forming Drum 2 Conveyor Conveyor 13 Crimping Lifting Unit 14 First Gripping Crimping Unit 15 Second Gripping Crimping Unit 40 Rear End Pressing Unit Pa Front Edge Detection Sensor Pb Rear Edge Detection Sensor W Tire Constituting Band Material Wa Tire Constituting Band Tip lower surface of material Wb Rear end lower surface of tire-constituting strip material La Distance between tip detection sensor and rear-end detecting sensor Lz Actual length of tire-constituting strip material W

Claims (2)

[Claims] 1. When the tire-constituting strip-shaped material is conveyed onto a conveyor, the first gripping and crimping unit adsorbs and holds the lower surface of the tire-constituting strip-shaped material on the front end side, and the conveyor is driven in this state. After transferring the tire-constituting strip-shaped material to the drum side by a predetermined distance, it is cut by a cutting device,
Then, the rear end side of the tire-constituting strip-shaped material is sandwiched by the second gripping and crimping unit and the rear-end pressing means, and the front end of the tire-constituting strip-shaped material is conveyed to the lower crimping position of the tire forming drum while being conveyed on the conveyor. The length of the tire-constituting strip-shaped material is measured by the front end detection sensor of the tire-constituting strip-shaped material and the rear-end detection sensor which are arranged at a predetermined interval, and the calculated value is compared with the circumferential length of the tire forming drum. Then, when the tip end of the belt-shaped material constituting the tire is pressure-bonded to the forming drum and wound around the peripheral surface of the forming drum, the tire-forming belt-shaped material is changed by changing the continuous ratio of the peripheral speed of the tire forming drum and the feeding speed of the conveyor. A method for supplying a belt-shaped material constituting a tire, characterized in that the front end and the rear end of the tire are abutted and attached. 2. A conveyor conveyer for conveying the tire-constituting strip-shaped material cut substantially corresponding to the circumferential length of the tire forming drum is installed below the tire forming drum, and the tip end side of the conveying conveyor is installed. Provided with a crimping elevating means for elevating and lowering toward the tire forming drum side, detecting the leading end and the rear end of the tire-constituting strip-shaped material being conveyed above the conveying conveyor and detecting the tire-constituting strip-shaped material. A front end detection sensor for measuring the length of the tire and a rear end detection sensor are installed at a predetermined interval, and can be moved together with the conveyance conveyor or stopped independently in the conveyance conveyor, and the tire configuration belt A first gripping and crimping unit for sucking and holding the front and lower surfaces of the material, a second gripping and crimping unit for sandwiching the upper and lower surfaces of the rear end of the tire-constituting strip-shaped material, and a rear end pressing means are provided. The sir and the trailing edge detection sensor were connected to an arithmetic and control unit for comparing and calculating the length of the belt-shaped material constituting the tire and the circumferential length of the tire forming drum, and the arithmetic and control unit was connected to the drive unit of the conveyor. A device for supplying a belt-shaped material constituting a tire, which is characterized in that: