JPH04351530A - Feeder for beltlike material - Google Patents

Abstract

PURPOSE:To control the feed rate of a beltlike material easily by keeping tension applied to a liner approximately constant up to a final stage after the initial stage of the start of the supply of the material. CONSTITUTION:A delivery shaft 24, which is supported rotatably by a roller bearing and to which a roll 14 is set up detachably, and a brake 25 giving braking force to the delivery shaft 24 are mounted to a roll mounting section 15, to which the roll 14, on which a beltlike material laminated on a liner is wound, is installed, are set up. A sensor 78 detecting the size of the diameter of the roll 14 on the delivery shaft 24 and a control section 80 controlling the braking force of the brake 25 in response to the change of the diameter of the roll by a signal from the sensor 78 so that tension at a time when the liner is pulled out by a pair of drawing rollers is kept approximately constant are mounted.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt-shaped material supply device used for supplying and winding a belt-shaped material such as a nylon band around a belt drum.

0002

2. Description of the Related Art When manufacturing tires, as shown in FIG.
After wrapping and reinforcing it, tread rubber 4 is wrapped around the outer periphery to form an assembly 5. Then, this assembly 5 is removed from the belt drum 1, stacked on the outer periphery of the tire carcass deformed into a toroidal shape, and pressed to obtain a green tire.

[0003] When making this assembly 5, it is necessary to keep the tension of the band 3 small and stable. That is, if this tension is too strong or if there are variations in the tension, when the assembly 5 is removed from the belt drum 1, the assembly 5
is deformed as shown in FIG. 15, making it difficult to stack the assembly 5 on the outer periphery of the tire carcass, making subsequent work difficult. Therefore, as disclosed in Japanese Patent Application Laid-Open No. 64-3634, a reel in which a nylon band with a liner pasted thereon is wound up into a roll is placed rotatably on a bearing stand in the mounting section. When the band is fed out from the reel, a pair of pull-out rollers driven by a motor are used to pinch the liner that has peeled off from the band and pull it out in the band feeding direction, so that no tension is applied directly to the band. That's what I do.

0004

[Problems to be Solved by the Invention] However, in the conventional feeding device, the shaft portions at both ends of the reel are placed in the recesses of a pair of left and right bearing stands, and the braking force is applied to the reel by the frictional resistance between the shaft portion and the bearing stands. Because of this, the braking force applied to the reel varies from reel to reel, and there is a drawback that the dispersion becomes large.

That is, at the initial stage of the start of feeding, the roll diameter is large and the frictional resistance is large, so a large braking force is applied to the shaft of the reel, but due to variations in the braking force, abnormal tension is applied to the liner. There is a risk that the liner may be cut between the reel and the pull-out roll. In addition, at the end stage when the roll diameter is small, if control is insufficient due to variations in braking force, slack will occur in the liner between the reel and the pull-out roll, and the band will not separate from the liner and will be pulled toward the pull-out roll. There is a risk of being caught and entangled.

[0006] Therefore, in the conventional supply device, the braking force varies from reel to reel, and the dispersion is large.
It is difficult to control the speed when feeding the band. In view of such conventional problems, the present invention aims to maintain the tension applied to the liner substantially constant from the initial stage of supplying a strip material such as a nylon band to the final stage, thereby facilitating the speed control of material supply. purpose.

[0007]

[Means for Solving the Problems] The present invention provides a liner 13
A roll mounting section 15 is equipped with a roll 14 wound with the strip material 3 , which is laminated with the strip material 3 , and a roll mounting section 15 is driven by a motor 16 to sandwich the liner 13 that has been peeled off from the strip material 3 and pull it out from the roll 14 in the feeding direction of the strip material 3 . A pair of pull-out rollers 17 and 18 , a supply head 21 that is movable forward and backward with respect to the belt drum 1 and supplies the belt-shaped material 3 to the belt drum 1 when moving forward; and a supply head 21 that supplies the belt-shaped material 3 fed from the roll 14 to the supply head 21 Guidance route 22
In the belt-like material supply device, the roll mounting portion 15 includes a feeding shaft 24 rotatably supported by rolling bearings and to which the roll 14 is detachably mounted, and a feeding shaft 24 that applies a braking force to the feeding shaft 24. A sensor 78 detects the size of the diameter of the roll 14, and a signal from the sensor 78 controls the brake 25 according to changes in the roll diameter so that the tension when the liner 13 is pulled out is approximately constant. A dancer roller 70 includes a control unit 80 that controls braking force, and guides the strip material 3 to the guide path 22.
71.

[0008]

[Operation] When supplying the strip material 3, the liner 13
The rolled roll 14 is attached to the feed shaft 24.
The liner 13 is clamped and pulled out by a pair of pull-out rollers 17 and 18, and the strip material 3 is fed out from the roll 14. On the other hand, the roll diameter is detected by the sensor 78, and the brake 25 is controlled via the control unit 80.
A braking force is applied to the delivery shaft 24 to keep the tension of the liner 13 substantially constant.

In this case, since the payout shaft 24 is supported by a rolling bearing, the effect of the size of the roll diameter on rolling resistance is small. Therefore, by controlling the brake 24 according to changes in the roll diameter, The tension of the liner 13 can be controlled to be substantially constant. Furthermore, since the tension of the liner 13 is approximately constant, the feeding rate of the strip material 3 can be easily controlled.

Dancer rollers 70, 7 are provided on the guide path 22.
1, and the dancer rollers 70, 71 move up and down so that the fed-out strip material 3 does not slacken.

[0011]

[Embodiment] Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.
and a device for supplying tread rubber 4 will be illustrated. In FIGS. 2 and 3, reference numeral 6 denotes a tread rubber supply device, which includes a movable frame 8 provided on a pedestal 7 so as to be able to move forward and backward in the near and far directions, a free roller conveyor 9 provided on this movable frame 8, and a conveyor 9. A kicking device 11 is provided for kicking out the upper tread rubber 4 with a kicking tool 10 while centering it.

Reference numeral 12 denotes a nylon band supply device, which includes a roll mounting section 15 for mounting a roll 14 wound with the nanlon band 3 bonded to the liner 13, and a roll mounting section 15 that is driven by a DC motor 16 and clamps the liner 13 peeled off from the band 3. a pair of pull-out rollers 17 and 18 that pull out the band from the roll 14 in the direction of feeding out the band; a winding shaft 20 that is driven by an air motor 19 and winds up the liner 13; It includes a supply head 21 that supplies the band 3 to the belt drum 1 during forward movement, and a guide path 22 that guides the band 3 fed out from the roll 14 to the supply head 21.

As shown in FIGS. 1 and 4, the roll mounting portion 15 is connected to the side plate 23 via a rolling bearing at the time of ball bearing.
It has a payout shaft 24 that is rotatably supported in a cantilevered manner and an air brake 25 that applies braking force to the payout shaft 24, and the roll 14 is removably fitted onto the payout shaft 24 from one end thereof. has been done. As shown in FIGS. 4 to 6, the side plate 23 is provided with a peeling guide shaft 26 that bends the liner 13 and peels it off from the band 3, and a feed star wheel 27 that guides the band 3 after peeling. . The guide shaft 26 and the wheel shaft 28 of the star wheel 27 are connected to the side plate 2.
3, and is interlocked and connected via a winding transmission mechanism 29.

As shown in FIG. 5, a pair of pull-out rollers 17,
18, one of the pull-out rollers 18 has a roller body 31 made of urethane rubber etc. fitted to a roller shaft 30, and the other pull-out roller 17 has a roller shaft 32 fitted with a knurled cylindrical body 33. , each of the roller shafts 30 and 32 is rotatably supported by a side plate 23 in a cantilevered manner. One roller shaft 30 is driven by a DC motor 16 via a winding transmission mechanism 34 and a speed reducer 35.

On the upper side of the pull-out rollers 17 and 18, as shown in FIG.
and a slit 3 through which the band 3 passes, as shown in Figure 7.
A support plate 37 having a diameter of 6 is arranged in a shade shape. One end of the support plate 37 is fixed to the side plate 23, and a bearing plate 38 is attached to the other end.
is provided. One roller shaft 30 is supported by a bearing case 39 fixed to this bearing plate 38, and the other roller shaft 32 is loosely fitted into a hole 40 made in this, and the bearing case is held by a bearing holding case 41. Supported through. The bearing holding case 41 is removably attached to the bearing plate 38, and when attached, the pair of pull-out rollers 17, 1
8 are brought into pressure contact with each other, and when removing
A gap is created at one end between the two.

The winding shaft 20 is rotatably supported by a side plate 23, and is driven in the band winding direction by an air motor 19 via a winding transmission mechanism 42, and the liner 13 pulled out by the pulling rollers 17, 18 is guided into the liner guide. It is wound up via a shaft 43. The supply head 21 is mounted on the pedestal 4
The movable frame 45 is provided at the tip of a movable frame 45 that is slidably provided on the movable frame 45. As shown in FIGS. 8 to 11, the supply head 21 includes a movable plate 4 having an arcuate guide surface 46 at its tip.
7 and a pair of guide plates 48 attached to both left and right sides of a movable plate 47, the pair of guide plates 48 have vertical guide rollers 49, 50 and a horizontal guide roller 51 on the front end side, and a horizontal guide roller 51 on the rear end side. A vertical guide roller 52 and a horizontal guide roller 53,
54 are installed respectively.

The vertical guide rollers 49, 50 are attached to each guide plate 48 via a mounting bracket 55, the vertical guide roller 52 is attached to each guide plate 48 via a mounting bracket 56, and the horizontal guide rollers 51, 53, 54 are attached to a pair of It is arranged between a pair of guide plates 48. A locking pawl 57 for locking the band 3 is provided on the upper side of the guide surface 46, and this locking pawl 57 is rotatably supported on one of the guide plates 48 via a support shaft 58 and a bracket 59. There is.

The movable plate 47 is supported in the left-right direction along a pair of front and rear guide rods 61 horizontally suspended between a pair of right and left mounting plates 60 at the front end of the movable frame 45, and a female threaded body 62 fixed to the movable plate 47. A threaded shaft 63 parallel to the guide rod 61 is screwed into the guide rod 61 . The screw shaft 63 is rotatably supported between a pair of mounting plates 60 and is driven in forward and reverse directions via a winding transmission mechanism 64 by a forward and reverse motor 65 fixed on one of the mounting plates 60 .

A pair of proximity switches 68 and 69 are provided on the support rod 66 that is suspended between the rear ends of the mounting plate 60, and when the proximity switches 68 and 69 detect the movable plate 47, the forward and reverse rotation is activated. The motor 65 is stopped. The guide path 22 includes a star wheel 27, first and second dancer rollers 70, 71, and fixed guide shafts 72, 7.
3. It is composed of a movable guide shaft 74 and the like. The fixed guide shafts 72 and 73 are rotatably mounted on the upper part of the side plate 23, and the movable guide shaft 74 is rotatably mounted on the movable frame 45. The dancer rollers 70 and 71 are for preventing the band 3 from sagging.The first dancer roller 70 is mounted on a lifting platform 76 that can be raised and lowered along two guide rods 75 on the left and right sides, and the second dancer roller 71 is mounted on a lifting platform 76 on the left and right sides. 1 each
Each book is supported along a book guide rod 77 so as to be able to rise and fall freely. Then, the first dancer roller 70 is at the upper and lower limit positions A,
The dancer roller 70 can be moved up and down between B and B, and the DC motor 16 is switched and controlled to high speed when the dancer roller 70 descends to a high speed switching position C, and to low speed when it rises to a low speed switching position D. Note that each position C and D is detected by a limit switch.

As shown in FIG. 1, a sensor 78 is attached to the side plate 23 of the roll mounting portion 15 to detect the diameter of the roll 14 mounted on the feed shaft 24. The sensor 78 consists of a number of reflective phototubes 79 arranged at predetermined intervals in the radial direction of the roll 14 , and each phototube 79 is connected to a control unit 80 . The control unit 80 is for controlling a pressure control valve 81 interposed between the air source and the air brake 25 via a drive unit 82.
The pressure control valve 81 is operated in response to a signal from each phototube 79 so that the tension applied to the liner 13 is approximately constant;
It is configured to control the braking force of the air brake 25.

That is, the air pressure is controlled by the pressure control valve 81.
Control is performed in the range of 0 to 6 kg/cm2, and when the roll diameter is at its maximum, the braking force applied by the brake 25 to the delivery shaft 24 is set to the maximum, and as the roll diameter becomes smaller, the braking force is gradually reduced. , the braking force is minimized when the diameter is the minimum. Note that the relationship between the roll diameter and the air pressure may be determined as an empirical value or may be a calculated value.

Next, a nylon band 3 is attached to the belt drum 1.
The operation when supplying is explained. First, a roll 14 in which the band 3 and a liner 13 are laminated together and wound is fitted and mounted on the feed-out shaft 24 of the roll mounting section 15, and the liner 13 is passed through the guide shaft 26 to the pair of draw-out rollers 17,1.
8, and wrap the end portion from the guide shaft 43 to the winding shaft 20. Meanwhile, the band 3 separated from the liner 13 is transferred to the star wheel 27, the dancer roller 70, and the guide shaft 7.
2. Pass it through the dancer roller 71 and guide shafts 73, 74 to the supply head 21.

Next, the DC motor 16 is started and the pair of pull-out rollers 17 and 18 pinch and pull out the liner 13, and the band 3 is sequentially pulled out from the roll 14 without applying any tension to the band 3 during pull-out. It can be played out. Therefore, the band 3 can be fed out at a predetermined feeding speed regardless of changes in the roll diameter, and the DC motor 16
speed control becomes easier.

The band 3 separated from the liner 13 is sent by the rotation of the star wheel 27. and,
The dancer roller 70,
71 moves up and down, and when the dancer roller 70 rises to the low-speed switching position D, the DC motor 16 is switched to low-speed rotation, and when it descends to the high-speed switching position C, the DC motor 16 is switched to high-speed rotation. Therefore, the dancer roller 70 moves up and down between the two positions C and D to keep the band 3 under constant tension.

The dancer roller 71 is normally in the lowered position, and when the supply head 21 moves forward toward the belt drum 1, the band 3 is pulled forward, and the dancer roller 71 rises. Then, the tip of the band 3 is pressed onto the belt drum 1, and as the belt drum 1 rotates, the band 3 is wound around the outer periphery of the belt 2. At this time,
Since the movable plate 47 moves in the left-right direction between the pair of proximity switches 68 and 69, the band 3 can be wound helically around the outer periphery of the belt 2.

When the roll 14 is mounted on the feeding shaft 24, each phototube 79 of the sensor 78 works to detect the size of the roll diameter. If the roll diameter is the maximum, the control section 80 is actuated by the signal from the sensor 78, drives the pressure control valve 81 via the drive section 82, and controls the air pressure of the air brake 25 to the maximum. As the band 3 is fed out, the roll diameter becomes smaller, and the sensor 7 sequentially detects the change in diameter.
8 detects this, the control unit 80 controls the pressure control valve 81 to sequentially lower the air pressure, and controls the braking force of the air brake 25 so that the tension of the liner 13 becomes approximately constant. Therefore, the tension applied to the liner 13 remains substantially constant regardless of the size of the roll diameter, so even when the roll 14 is replaced, there is no variation in the braking force. Therefore, the speed of the DC motor 16 can be easily controlled, and the band 3 can be stably supplied at a predetermined delivery speed.

The structure of the portion where the liner 13 is held between the pair of pull-out rollers 17 and 18 may be as shown in FIGS. 12 and 13. That is, the U-shaped tightening arm 8 is attached to the bearing case 39 at the shaft end of one of the pull-out rollers 18 with a pin 84.
5 is pivoted. A handle 86 is attached to the tightening arm 85.
and a pair of clamp balls 88 held by screws 87, and the clamp balls 88 are connected to the other pull-out roller 1.
It is removably engaged with a circumferential groove 90 formed in a bearing case 89 at the end of the shaft of No. 7. Therefore, by rotating the tightening arm 85 around the pin 84 to engage and disengage the clamp ball 88 from the circumferential groove 90, the pair of pull-out rollers 17 and 18 can be tightened and released.

[0028]

Effects of the Invention According to the present invention, the roll mounting section 15 is equipped with the roll 14 wound with the strip material 3 bonded to the liner 13, and the roll mounting section 15 is driven by the motor 16 to sandwich the liner 13 peeled from the strip material 3. Strip material 3
A pair of pull-out rollers 1 that are pulled out from the roll 14 in the feed-out direction of
7, 18, a supply head 21 which is movable forward and backward with respect to the belt drum 1 and supplies the strip material 3 to the belt drum 1 when moving forward, and a guide path which guides the strip material 3 fed out from the roll 14 to the supply head 21. 22, the roll mounting portion 15 includes a feeding shaft 24 rotatably supported by rolling bearings and to which the roll 14 is detachably mounted, and a braking force applied to the feeding shaft 24. A sensor 78 detects the size of the diameter of the roll 14, and a sensor 78 detects the diameter of the roll 14, and the brake 25 operates according to changes in the roll diameter based on a signal from the sensor 78 so that the tension when drawing out the liner 13 is approximately constant. A control unit 80 for controlling the braking force of the guide route 22,
Since the dancer rollers 70 and 71 are provided to guide the strip material 3, the tension applied to the liner 13 is kept approximately constant from the beginning to the end of the supply of the strip material 3, making it easy to control the speed of material supply. At the same time, it is possible to eliminate slack in the strip material 3 and maintain a constant tension state.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing a brake control device.

FIG. 2 is a side view showing the entire supply device.

FIG. 3 is a plan view of the same.

FIG. 4 is a cross-sectional side view of the band supply device.

FIG. 5 is a developed cross-sectional view of the same.

FIG. 6 is a cross-sectional side view of the liner peeling section.

FIG. 7 is a partially cutaway side view of the pull-out roll portion.

FIG. 8 is a cross-sectional view of the supply head portion.

FIG. 9 is a plan view of the same.

FIG. 10 is a side view of the supply head.

FIG. 11 is a view taken along the line XX in FIG. 10;

FIG. 12 is a sectional view of the pull-out roller portion.

FIG. 13 is a partially cutaway side view of the pull-out roller tightening section.

FIG. 14 is a cross-sectional view showing an assembly manufacturing method.

FIG. 15 is a side view of the assembly.

[Explanation of symbols]

1 Belt drum 3. Strip material 4 Tread rubber 5 Assembly 13 Liner 14 roll 15 Roll device section 16 Motor 17 Pull-out roller 18 Pull-out roller 24　Feeding shaft 25 Brake 70 Dancer Laura 71 Dancer Laura 78 sensor 80 Control section 81 Pressure control valve

Claims (1)

[Claims] [Claim 1] A roll mounting section (15) for mounting a roll (14) wound with a strip material (3) bonded to a liner (13), and a roll mounting section (15) that is driven by a motor (16) and from which the strip material (3) is wound. A pair of pull-out rollers (17) and (18) that pinch the peeled liner (13) and pull out the strip material (3) from the roll (14) in the pay-out direction, and a belt drum (1) that can freely move forward and backward with respect to the belt drum (1). At the same time, a supply head (
21) and the strip material (3) fed out from the roll (14).
) to the supply head (21).
A feed shaft (24) rotatably supported by a rolling bearing on a roll mounting portion (15) and to which a roll (14) is removably mounted.
and a brake (
and a sensor (78) for detecting the size of the diameter of the roll (14), and a sensor (78) that detects the diameter of the roll by a signal from the sensor (78) so that the tension when pulling out the liner (13) is approximately constant. a control unit (80) that controls the braking force of the brake (25) according to changes in the guide route (22).
), a dancer roller (7) guides the strip material (3).
0) A feeding device for a strip-shaped material, characterized in that it is provided with (71).