WO2011030764A1 - ビードの製造方法及び製造装置 - Google Patents
ビードの製造方法及び製造装置 Download PDFInfo
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- WO2011030764A1 WO2011030764A1 PCT/JP2010/065344 JP2010065344W WO2011030764A1 WO 2011030764 A1 WO2011030764 A1 WO 2011030764A1 JP 2010065344 W JP2010065344 W JP 2010065344W WO 2011030764 A1 WO2011030764 A1 WO 2011030764A1
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- WIPO (PCT)
- Prior art keywords
- winding
- bead
- bead wire
- wire bundle
- binding yarn
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
Definitions
- the present invention relates to a method and apparatus for manufacturing a bead for use in a pneumatic tire.
- FIG. 9 is a meridional sectional view of a bead portion in a general pneumatic tire.
- a bead portion 1 shown in FIG. 9 is a portion provided on the inner side in the tire radial direction of a sidewall portion (not shown), and includes a bead core 2 and a bead filler 3.
- the bead core 2 is a so-called single wind structure in which a single bead wire 120 is wound a plurality of times to form an annular shape.
- the bead filler 3 is a rubber material for reinforcing the bead core 2.
- a pair of bead portions 1 configured as described above are provided so as to be symmetrical about the tire equator plane.
- a carcass 5 is wound around the pair of bead portions 1 and 1 in a toroidal shape.
- the carcass 5 is composed of a plurality of carcass cords arranged in parallel and covered with a rubber material, and both ends of the carcass 5 around the bead core 1 from the tire width direction inner side to the tire width direction outer side as shown in FIG. Wrapped towards.
- FIG. 10 is a perspective view showing a part of the bead core 2 shown in FIG.
- the bead core 2 is formed by annularly winding a single bead wire 120 a plurality of times.
- the bead core 2 has a structure in which the winding start end portion 150 and the winding end end portion 160 of the bead wire 120 are wound so as to overlap each other as shown in FIG. 10, in order to prevent the winding of the wound bead wire 120.
- the binding yarn 140 is spirally wound around a region where the winding start end portion 150 and the winding end end portion 160 overlap and in the vicinity thereof (see, for example, Patent Document 1).
- FIG. 10 is a diagram schematically showing the vicinity of the stepped portion 170 of the bead core 2.
- reference numerals 5a and 5A indicated by broken lines are a plurality of carcass cords constituting the carcass 5 shown in FIG.
- the carcass 5 is folded back from the inner side in the tire width direction toward the outer side in the tire width direction so as to be in contact with the inner peripheral surface of the bead core 2, but on the inner peripheral surface of the bead core 2.
- a gap is generated between the carcass 5 and the bead core 2 in the step portion 170. That is, as shown in FIG. 11, a gap with a length ⁇ 0 is generated between the carcass cord 5 ⁇ / b> A disposed in the stepped portion 170 and the bead core 2.
- the carcass 5 is pulled in the direction of the arrow D shown in FIG. 9, that is, the inner side in the tire width direction and the outer side in the tire radial direction.
- the carcass cord 5A arranged in the stepped portion 170 is displaced in the direction of the arrow E shown in FIG. 11, and accordingly, a portion of the carcass cord 5A inside the tire width direction is loosened. Arise.
- the so-called “end disturbance” in which the intervals of the carcass cords are uneven is likely to occur.
- the present invention has been made in view of the above, and provides a method and apparatus for manufacturing a bead having a function of preventing end disturbance of a carcass cord caused by a step portion generated by a winding start end portion of a bead wire. With the goal.
- a method for manufacturing a bead according to the present invention includes a bead wire bundle formed in an annular shape by winding a single bead wire a plurality of times by a support roller.
- the winding of the bead wire in the bead wire bundle is controlled so that the rotation speed of the support roller is slower than that when the binding thread is wound around a region other than the step portion while the binding yarn is wound around the step portion generated by the start end portion.
- the winding speed of the winding device winds the binding yarn around an area other than the stepped portion.
- the binding yarn is wound at a smaller pitch than the region other than the stepped portion by controlling the rotational speed of the winding device so as to be faster than that of the step or at least one of the control. It is characterized by that.
- a bead manufacturing method a bead having a function of reducing the amount of the step by winding the binding yarn around the step to a high density and preventing end disturbance of the carcass cord due to the step is manufactured. can do.
- the time required for the bead wire bundle to rotate is calculated in advance as the distance from the winding start position of the binding yarn to the end of the stepped portion, The control is performed when the time has elapsed from the start time of winding the binding yarn around the bead wire bundle.
- the distance from the winding start position of the binding yarn to the end of the stepped portion is calculated in advance, and the bead wire bundle is only the distance from the winding start position. If it rotates, the control is performed.
- the bead manufacturing method according to the present invention is characterized in that a sensor for detecting a winding start end of a bead wire is disposed at a predetermined position, and the control is performed based on a detection result of the sensor in the bobbin winding step. To do.
- the bead manufacturing apparatus includes a support roller that supports a bead wire bundle formed in an annular shape by winding a single bead wire a plurality of times so as to be rotatable in a circumferential direction of the bead wire bundle, and the support roll.
- a winding device that winds a binding yarn around the bead wire bundle while rotating in the circumferential direction of the cross section of the supported bead wire bundle, and the bead wire bundle is rotated by rotating the winding device while rotating the bead wire bundle by the support roller.
- the thread winding device includes a first driving device that rotates the support roller, and a second device that rotates the winding device.
- the control device is compared with the case where the winding device winds the rotation speed of the support roller around a region other than the step portion while the binding yarn is wound around the step portion generated by the winding start end portion of the bead wire in the bead wire bundle.
- the first driving device is controlled so as to be slow, or the second driving device is set so as to be faster than the case where the rotation speed of the winding device is wound around an area other than the stepped portion.
- the binding yarn is wound at a pitch smaller than that of the region other than the stepped portion by controlling or at least one of the control.
- a bead having a function of reducing the amount of the step by winding the binding yarn around the step to a high density and preventing end disturbance of the carcass cord due to the step is manufactured. can do.
- the control device calculates in advance the time required for the bead wire bundle to rotate, the distance from the winding start position of the binding yarn to the end of the stepped portion, The control is performed when the time elapses from the start time of winding the binding yarn around the bead wire bundle.
- this bead manufacturing apparatus it is possible to manufacture a bead having a function of reducing the amount of the step and preventing end disturbance of the carcass cord due to the step.
- the control device calculates in advance a distance from the winding start position of the binding yarn to the end of the stepped portion, and the bead wire bundle is calculated from the winding start position by the distance. If it rotates, the control is performed.
- this bead manufacturing apparatus it is possible to manufacture a bead having a function of reducing the amount of the step and preventing end disturbance of the carcass cord due to the step.
- the bead manufacturing apparatus includes a sensor that detects a winding start end portion of the bead wire, and the control device performs the control based on a detection result of the sensor.
- this bead manufacturing apparatus it is possible to manufacture a bead having a function of reducing the amount of the step and preventing end disturbance of the carcass cord due to the step.
- the binding yarn is spirally formed in the bead wire bundle by rotating the winding device in the circumferential direction of the bead wire bundle while rotating the bead wire bundle in the circumferential direction by the support roller.
- the rotational speed of the support roller is slowed or the rotational speed of the winding device is increased while winding the binding yarn around the step formed by the winding start end of the bead wire in the bead wire bundle, or at least By performing control of either one, the binding yarn is wound with a smaller pitch than the region other than the stepped portion.
- the amount of the step is reduced by winding the binding yarn around the step portion with high density, and the end disorder of the carcass cord due to the step portion is prevented.
- a bead having a function can be manufactured.
- FIG. 1 is a schematic perspective view showing a part of a bead core manufactured by a bead manufacturing method and a manufacturing apparatus according to the present embodiment.
- FIG. 2 is a schematic view of the vicinity of the step portion of the bead core shown in FIG.
- FIG. 3A is a schematic configuration diagram of a bobbin winding device in a bead manufacturing apparatus.
- FIG. 3-2 is a schematic configuration diagram of a bobbin winding device in the bead manufacturing apparatus.
- FIG. 4A is a schematic configuration diagram of a bobbin winding device in a bead manufacturing apparatus.
- FIG. 4B is a schematic configuration diagram of a yarn winding device in the bead manufacturing device.
- FIG. 1 is a schematic perspective view showing a part of a bead core manufactured by a bead manufacturing method and a manufacturing apparatus according to the present embodiment.
- FIG. 2 is a schematic view of the vicinity of the step portion of the bead core shown in FIG.
- FIG. 5A is a schematic configuration diagram of a bobbin winding device in a bead manufacturing apparatus.
- FIG. 5-2 is a schematic configuration diagram of a bobbin winding device in the bead manufacturing apparatus.
- FIG. 6A is a schematic configuration diagram of a bobbin winding device in a bead manufacturing apparatus.
- FIG. 6B is a schematic configuration diagram of a yarn winding device in the bead manufacturing device.
- FIG. 7 is a partially enlarged view of the bobbin winding device.
- FIG. 8 is a diagram for explaining an example of control using a sensor.
- FIG. 9 is a meridional sectional view of a bead portion in a conventional pneumatic tire.
- FIG. 10 is a schematic perspective view showing a part of a conventional bead core.
- FIG. 11 is a schematic view of the vicinity of the step portion of the bead core shown in FIG.
- the tire width direction means a direction parallel to the rotation axis (not shown) of the pneumatic tire
- the inner side in the tire width direction means the side toward the tire equatorial plane in the tire width direction, and the outer side in the tire width direction.
- the tire equator plane is a plane orthogonal to the rotational axis of the pneumatic tire and passing through the center of the tire width of the pneumatic tire.
- the tire equator line is a pneumatic tire on the tire equator plane. A line along the circumferential direction.
- the tire radial direction refers to a direction orthogonal to the rotation axis, the tire radial inner side is the side toward the rotation axis in the tire radial direction, and the tire radial direction outer side is the side away from the rotation axis in the tire radial direction.
- the tire circumferential direction is a circumferential direction with the rotation axis as a central axis.
- FIG. 1 is a schematic perspective view showing a part of a bead core 10 manufactured by a bead manufacturing method and a manufacturing apparatus according to the present embodiment.
- the bead core 10 constitutes the bead portion of the pneumatic tire as described with reference to FIG. 9, and although not shown, the bead core 10 serves to fix the pneumatic tire to the rim flange portion of the wheel, and the pneumatic tire It has a role to support the carcass cord tension generated by the internal pressure of the carcass.
- the bead core 10 is configured by winding a bead wire 14 around a bead wire bundle 13 formed in an annular shape by continuously winding a single bead wire (steel wire) 12 a plurality of times.
- the cross-sectional shape of the bead wire bundle 13 is, for example, a hexagonal shape or a rectangular shape.
- the bead wire 12 is wound so that the winding start end portion 15 and the winding end end portion 16 overlap each other, and in order to suppress the bead wire 12 from expanding (separating) in the bead core circumferential direction, the winding start is started.
- the above-described binding yarn 14 is wound over the end 15, the winding end 16 and the vicinity thereof.
- the binding yarn 14 is a cord made of an organic fiber such as vinylon (registered trademark) or nylon (registered trademark).
- the diameter of the binding yarn 14 is smaller than the diameter of the bead wire 12.
- the winding start end 15 of the bead wire 12 is located on the inner peripheral side of the bead core 10 as shown in FIG. Therefore, the winding start end portion 15 causes a step that protrudes inward in the tire radial direction on the inner peripheral surface of the bead core 10.
- the extension region from the end surface 18 at the winding start end portion 15 of the bead wire 12 and the vicinity of the end surface 18 are referred to as “stepped portion 17”.
- the winding pitch of the binding yarn 14 in the stepped portion 17 is wound at a high density with a smaller pitch than the winding pitch in the region other than the stepped portion 17.
- the step amount of the step generated by the winding start end portion 15 of the bead wire 12 is reduced.
- a portion where the binding yarn 14 is wound around the step portion 17 at a high density is referred to as a “high density winding portion 20”.
- the winding width of the high-density winding portion 20 is set as the width of the step portion 17.
- FIG. 2 is a schematic view of the vicinity of the stepped portion 17 of the bead core 10 shown in FIG.
- reference numeral 5 a indicated by a broken line is a carcass cord constituting a carcass (see FIG. 9) arranged along the bead core 10.
- the plurality of carcass cords 5 a are arranged at regular intervals along the circumferential direction of the bead core 10.
- the carcass cord disposed at the position closest to the end face 18 of the winding start end portion 15 is referred to as “carcass cord 5A”.
- the diameter of the carcass cords 5a and 5A will be described as d.
- the distance L 0 from the end surface 18 at the winding start end portion 15 of the bead wire 12 to the binding yarn 14 closest to the end surface 18 is within d / 2
- the condition winding pitch L 1 of the binding yarn 14 is within d / 2
- two turns in the circumferential surface of the bead wire bundle 13 is wrapped (Figure in 2 5 weeks) spiral.
- the bead core 10 shown in FIG. 2 the amount of the step formed on the inner peripheral surface of the bead core 10 is reduced by the high-density winding portion 20, so that the carcass cord 5 ⁇ / b> A is shown in FIG. 2.
- the bead core 10 (binding yarn 14) has a length ⁇ 1 that is smaller (or 0) than ⁇ 0 shown in FIG.
- the carcass cord 5A is not loosened as much as the conventional part in the tire width direction. Therefore, it is possible to effectively prevent the end disturbance of the carcass cord due to the stepped portion 17.
- the binding yarn 14 may not exist between the carcass cord 5A and the bead core 10.
- a gap of length ⁇ 0 (see FIG. 11) still exists between the carcass cord 5A and the bead core 10. Therefore, the above-described effect cannot be obtained.
- the winding pitch L 1 of the binding yarn 14 exceeds d / 2. That is, in the stepped portion 17, when the carcass cord 5A is positioned between the adjacent binding yarns 14 and the binding yarns 14, the binding yarns 14 do not exist, and therefore the step amount is the same as that shown in FIG.
- the number of times wound around the binding yarn 14 to the stepped portion 17 is at least twice the width L 2 wound into the step portion 17 is about twice to four times the diameter d of the carcass cord 5A.
- the diameter of the binding yarn 14 is extremely small compared to the diameter of the bead wire 12, the binding yarn 14 in the high-density winding portion 20 is wound a plurality of times in the tire radial direction.
- the bead manufacturing method of the present embodiment is a method of manufacturing the bead core 10 shown in FIGS. 1 and 2, and more specifically, the binding yarn 14 to the stepped portion 17 in the winding region of the binding yarn 14. This is a method in which the binding yarn is wound around the step portion 17 at a high density by making the winding pitch of the winding portion smaller than the region other than the step portion.
- a bead manufacturing apparatus to which the bead manufacturing method according to the present embodiment is applied will be described.
- the bead manufacturing apparatus includes a winding device (not shown), a bobbin winding device (see FIG. 3), and a bead filler pasting device (not shown).
- the winding device is a device that forms a bead wire bundle 13 shown in FIG. 1 by winding a single bead wire around a drum a plurality of times.
- the yarn winding device is a device that forms a bead core 10 (see FIG. 1) by winding a binding yarn 14 (see FIG. 1) around a bead wire bundle 13 formed by a winding device.
- the winding region of the binding yarn 14 is a winding start end 15 and a winding end end 16 of the bead wire 12 and the vicinity thereof.
- a bead filler sticking device is a device which sticks bead filler 3 (refer to Drawing 9) to bead core 10 formed with a spooling device.
- a bead wire bundle 13 is formed by winding a single bead wire around a drum of the winding apparatus a plurality of times.
- the formed bead wire bundle 13 is sent to a thread winding device by a conveying / attaching device (not shown) and set at a predetermined position.
- the bead core 10 is formed by winding the binding yarn 14 around the bead wire bundle 13 using a yarn winding device.
- the formed bead core 10 is sent to the bead filler affixing device by the conveying / attaching device and set at a predetermined position.
- bead filler 3 is stuck on bead core 10 using a bead filler sticking device.
- a bead is completed by sequentially performing the above three steps. The completed bead is transported and stored in a bead stock device (not shown).
- FIGS. 3-1 to 6-2 are schematic configuration diagrams of the yarn winding device 20 in the bead manufacturing device, showing a state in which the bead wire bundle 13 is set in the yarn winding device 20 and the binding yarn 14 is wound.
- Yes. 3-1, FIG. 4-1, FIG. 5-1, and FIG. 6-1 are views of the bobbin winding device 20 viewed from the position where the bead wire bundle 13 set in the bobbin winding device 20 faces the front.
- FIG. 4-2, FIG. 5-2, and FIG. 6-2 are views of FIG. 3-1, FIG. 4-1,
- FIG. FIG. 7 is a schematic block diagram showing a part of the thread winding device 20 in an enlarged manner.
- the configuration of the bobbin winding device 20 will be described with reference to these drawings.
- the thread winding device 20 includes a pair of support rollers 21a and 21b, a support roller drive motor M1 (hereinafter referred to as “drive motor M1” for brevity). , A yarn supply device 23, a winding device 30, a winding device drive motor M2 (hereinafter referred to as “drive motor M2" for short), and a control device 40 that controls the drive of the drive motor M1 and the drive motor M2. It is prepared for.
- the pair of support rollers 21a and 21b support the bead wire bundle 13 so as to be rotatable in the circumferential direction.
- the support rollers 21 a and 21 b are arranged one by one at positions on both sides of the winding device 30 and away from the winding device 30.
- the pair of support rollers 21a and 21b are respectively arranged on the inner peripheral side and the outer peripheral side of the bead wire bundle 13, and are connected to the drive motor M1 via a transmission mechanism (not shown). Then, the drive motor M1 is driven with the support rollers 21a and 21b sandwiching the bead wire bundle 13, and the support rollers 21a and 21b are rotated in the directions shown in FIGS. Rotate in the B direction (circumferential direction of the bead wire bundle 13).
- the yarn supplying device 23 includes a yarn unwinding portion 24, a gripping portion 25, and a yarn cutting portion 26 as shown in FIG.
- the grasping portion 25 sandwiches and holds the leading end of the binding yarn 14 unwound from the yarn unwinding portion 24.
- the grip portion 25 is connected to a cylinder (not shown), and can be moved to the vicinity of the center portion of the winding device 30 while holding the binding yarn 14 by driving the cylinder, and along the circumferential direction of the bead wire bundle 13. It is configured to be movable.
- the yarn cutting unit 26 cuts the bundled yarn that has been wound, and is fixed above the winding device 30.
- the winding device 30 is a device that spirally winds the binding yarn 14 around the terminal portion (winding start end portion 15 and winding end end portion) of the bead wire bundle 13 supported by the support rollers 21a and 21b and the vicinity thereof.
- the winding device 30 is formed into a hollow disk shape (substantially cylindrical) inside, and extends from a part of the peripheral surface of the winding device 30 to the center of the winding device 30 as shown in FIG.
- An existing cutout groove 31 is provided.
- a concave groove 32 for winding the binding yarn 14 is provided on the peripheral surface of the winding device 30.
- an opening (not shown) for introducing the binding yarn 14 into the winding device 30 is provided in a part of the peripheral surface of the winding device 30.
- the winding device 30 is connected to the drive motor M2 through a transmission mechanism (not shown), and rotates in the direction of arrow C shown in FIG. 3-2 around the center of the disk by the drive of the drive motor M2.
- the control device 40 controls the drive of the drive motor M1 and the drive motor M2 as shown in FIG. Specifically, when winding the binding yarn 14 around the stepped portion 17, the control device 40 winds the binding yarn 14 at a smaller pitch than the region other than the stepped portion 17 so as to drive the driving motor M ⁇ b> 1 and the driving motor M ⁇ b> 2. To control. Specific control contents of the control device 40 will be described later.
- the control unit 40 controls the drive motors M1 and M2 to rotate the support rollers 21a and 21b and the winding device 30 at a constant rotational speed, respectively. is doing.
- the bead wire bundle 13 is sent to the bobbin winding device 20 by the transport / attachment device. As shown in FIGS. 3A and 3B, the conveying / mounting device inserts the bead wire bundle 13 into the notch groove portion 31 of the winding device 30, and the bottom of the notch groove portion 31 (that is, the center position of the winding device 30). And the bead wire bundle 13 is set on the support rollers 21a and 21b.
- the yarn winding device 20 drives a cylinder (not shown) to lower the binding yarn 14 as shown in FIGS.
- the tying yarn 14 held at 25 is introduced into the winding device 30 from an opening (not shown) of the winding device 30.
- the yarn winding device 20 drives the drive motor M2 through the control device 40 from the state shown in FIG. 4-2 to rotate the winding device 30 in the direction of arrow C, and drives the drive motor M1 to support rollers 21a, 21b is rotated and the bead wire bundle 13 is sent in the arrow B direction.
- the binding yarn 14 is guided by the guide portion 33 inside the winding device 30 as shown in FIG. 5B, and the binding yarn 14 is wound around the peripheral surface of the bead wire bundle 13.
- the binding yarn 14 is also guided into the groove 32 on the circumferential surface of the winding device 30 as shown in FIG.
- the grip portion 25 can be moved together with the bead wire bundle 13 by driving a cylinder (not shown). Accordingly, by feeding the bead wire bundle 13 in the direction of arrow B while rotating the winding device 30 in the direction of arrow C, the grip portion 25 moves together with the bead wire bundle 13 while applying tension to the binding yarn 14. As a result, as shown in FIG. 6A, the binding yarn 14 is wound spirally around the peripheral surface of the bead wire bundle 13. When the bundling yarn 14 having a required length is guided to the winding device 30, the bundling yarn 14 is cut by the yarn cutting unit 26 as shown in FIG.
- the control device 40 is configured to wind the rotation speed of the support rollers 21 a and 21 b around the region other than the step portion 17 while the winding device 30 winds the binding yarn 14 around the step portion 17 of the bead wire bundle 13.
- the drive motor M1 is controlled so as to be slower than the drive motor M1, or the drive motor M2 is controlled so that the rotation speed of the winding device 30 is increased as compared with the case of winding around the region other than the stepped portion 17.
- At least one of the controls is performed.
- the high density winding part 20 is formed in the step part 17 as shown in FIG.
- a specific control example of the control device 40 will be described. In the following control example, a case where the rotation speed of the support rollers 21a and 21b is decreased will be described.
- the drive motor M1 is set so that the rotation speed of the support rollers 21a and 21b becomes slow. Control. Further, if a preset time T 2 has elapsed from the time when this control is started, the control of the drive motor M1 is returned to the normal control, the support rollers 21a and 21b are rotated at the normal rotation speed, and the binding yarn 14 Wind to the end of winding. From the above, the winding of the binding yarn 14 around the bead wire bundle 13 is completed, and the bead core 10 shown in FIG. 1 is formed.
- Control example 2 In performing winding step, it is calculated in advance the distance to the winding start position S 2 of the dense winding part 20 from the start position S 1 winding of the binding yarn 14 (i.e. one end portion of the stepped portion 17). Further, the distance from the winding start position S 2 of the high-density winding part 20 to the winding end position S 3 of the high-density winding part 20 (that is, the winding width L 2 of the high-density winding part 20) is calculated in advance.
- the rotation speed of the support rollers 21a and 21b is increased.
- the drive motor M1 is controlled so as to slow down. Furthermore, if the bead wire bundle 13 is rotated (moved) by a preset distance L 2 from the point where this control is started, the control of the drive motor M1 is returned to normal, and the support rollers 21a and 21b are rotated at normal rotation speed. Thus, the wrapping yarn 14 is wound up to the winding end position.
- the process of winding the binding yarn around the bead wire bundle 13 is completed, and the bead core 10 shown in FIG. 1 is formed.
- the sensor 41 that detects the stepped portion 17 of the bead wire bundle 13 is fixed at a predetermined position, and the above control is performed based on the detection result of the sensor 41.
- a non-contact sensor such as an ultrasonic sensor that detects the distance between the bead wire bundle 13 and the sensor 41, or a contact sensor that detects the stepped portion 17 by contacting the winding start end 15 of the bead wire 12. Etc. are used.
- FIG. 8 shows an arrangement example of the sensor 41 when a non-contact sensor is used as the sensor 41. In the example shown in FIG.
- the sensor 41 is arranged so that the distance between the sensor 41 and the winding device 30 is substantially the same as the winding width L 2 of the high-density winding portion 20.
- the time required for the bead wire bundle 13 to rotate (move) the distance from the winding start position S 2 of the high-density winding part 20 to the winding end position S 3 of the high-density winding part 20. T 2 is calculated in advance.
- the yarn winding process is started, and the bead wire bundle 13 is rotated in the direction of arrow B as shown in FIG. 8 to wind the binding yarn 14 around the bead wire bundle 13.
- the sensor 41 detects the winding start end 15 and transmits a detection result to the control device 40.
- the control device 40 controls the drive motor M1 so that the rotational speeds of the support rollers 21a and 21b become slow. Further, if a preset time T 2 has elapsed from the time when this control is started, the control of the drive motor M1 is returned to the normal control, the support rollers 21a and 21b are rotated at the normal rotation speed, and the binding yarn 14 Wind to the end of winding. From the above, the winding of the binding yarn 14 around the bead wire bundle 13 is completed, and the bead core 10 shown in FIG. 1 is formed.
- the high-density winding part 20 is formed by reducing the rotation speed of the support rollers 21a and 21b has been described.
- the high-speed winding part 20 can be formed by increasing the rotation speed of the winding device 30.
- the same conditions as described above are used.
- the high-density winding portion 20 is formed by controlling the rotational speeds of both the support rollers 21a and 21b and the winding device 30, the same conditions as described above are used. Which of the rotation speeds of the support rollers 21a and 21b and the winding device 30 is to be changed may be appropriately selected according to the winding condition of the binding yarn 14 and the like.
- the bead wire bundle 13 is rotated in the arrow B direction in the bobbin winding process, but the bead wire bundle 13 may be rotated in the direction opposite to the arrow B direction.
- the winding direction of the binding yarn 14 is reversed. That is, the binding yarn 14 starts to be wound from the winding end end 16 side of the bead wire, and is wound in the order of the winding start end 15 and the stepped portion 17.
- the control example 1 and the control example 2 can be applied. Further, when the control using the sensor 41 is performed, the sensor 41 is disposed at substantially the same position as the winding position of the winding device 30. The rest is the same as the control example 3.
- the bead manufacturing method and manufacturing apparatus while the binding yarn 14 is wound around the step portion 17 generated by the winding start end portion 15 of the bead wire 12 in the bead wire bundle 13, the support rollers 21a,
- the bundling yarn 14 is wound at a smaller pitch than the region other than the stepped portion 17 by slowing down the rotational speed of 21b or increasing the rotational speed of the winding device 30.
- the amount of step 17 is reduced by winding the binding yarn 14 around the step 17 of the bead wire bundle 13 with high density, and the carcass cord resulting from the step 17 is provided.
- a bead having a function of preventing end disturbance 5a can be manufactured by a simple method.
- the bead manufacturing method and manufacturing apparatus can manufacture a bead in which the level difference caused by the winding start end of the bead wire is reduced.
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Abstract
Description
糸巻き工程を行うにあたり、結束糸14の巻き付け開始位置S1から高密度巻部20の巻き付け開始位置S2(すなわち段差部17の一端部)までの距離をビードワイヤ束13が回転(移動)するのに要する時間T1を予め算出しておく。また、高密度巻部20の巻き付け開始位置S2から高密度巻部20の巻き付け終了位置S3(すなわち段差部17の他端部)までの距離をビードワイヤ束13が回転(移動)するのに要する時間T2を予め算出しておく。そして、糸巻き工程において、ビードワイヤ束13への結束糸14の巻き付けを開始した時刻から予め設定した時間T1が経過したならば、支持ローラ21a,21bの回転速度が遅くなるように駆動モータM1を制御する。さらに、この制御を開始した時刻から予め設定した時間T2が経過したならば、駆動モータM1の制御を通常制御に戻し、支持ローラ21a,21bを通常の回転速度で回転させて、結束糸14の巻き付け終了位置まで巻き付けていく。以上より、ビードワイヤ束13への結束糸14の巻き付けが完了し、図1に示したビードコア10が形成される。
糸巻き工程を行うにあたり、結束糸14の巻き付け開始位置S1から高密度巻部20の巻き付け開始位置S2(すなわち段差部17の一端部)までの距離を予め算出しておく。また、高密度巻部20の巻き付け開始位置S2から高密度巻き部20の巻き付け終了位置S3までの距離(すなわち高密度巻部20の巻き幅L2)を予め算出しておく。そして、糸巻き工程において、ビードワイヤ束13への結束糸14の巻き付け開始位置S1から上記の予め設定した距離L3だけビードワイヤ束13が回転(移動)したならば、支持ローラ21a,21bの回転速度が遅くなるように駆動モータM1を制御する。さらに、この制御を開始した地点から予め設定した距離L2だけビードワイヤ束13が回転(移動)したならば、駆動モータM1の制御を通常に戻し、支持ローラ21a,21bを通常の回転速度で回転させて、結束糸14の巻き付け終了位置まで巻き付けていく。以上より、ビードワイヤ束13への結束糸の巻き付け工程が完了し、図1に示したビードコア10が形成される。
図8に示すように、ビードワイヤ束13の段差部17を検出するセンサ41を所定位置に固定し、このセンサ41の検出結果に基づいて上記の制御を行う。センサ41としては、ビードワイヤ束13とセンサ41との間の距離を検出する超音波センサ等の非接触センサや、ビードワイヤ12の巻き始め端部15に接触することにより段差部17を検出する接触センサ等を用いる。図8は、センサ41として非接触センサを用いた場合のセンサ41の配置例を示している。図8に示す例では、センサ41と巻き付け装置30との間の距離が高密度巻部20の巻き付け幅L2とほぼ同じとなるようにセンサ41が配置してある。また、制御例1と同様にして、高密度巻部20の巻き付け開始位置S2から高密度巻部20の巻き付け終了位置S3までの距離をビードワイヤ束13が回転(移動)するのに要する時間T2を予め算出しておく。糸巻き工程を開始し、図8に示すようにビードワイヤ束13を矢印B方向に回転させ、ビードワイヤ束13に結束糸14を巻き付けていく。ここで、ビードワイヤ12の巻き始め端部15がセンサ41を通過すると、センサ41は、巻き始め端部15を検出し、制御装置40に対して検出結果を送信する。検出結果を受信した制御装置40は、支持ローラ21a,21bの回転速度が遅くなるように駆動モータM1を制御する。さらに、この制御を開始した時刻から予め設定した時間T2が経過したならば、駆動モータM1の制御を通常制御に戻し、支持ローラ21a,21bを通常の回転速度で回転させて、結束糸14の巻き付け終了位置まで巻き付けていく。以上より、ビードワイヤ束13への結束糸14の巻き付けが完了し、図1に示したビードコア10が形成される。
12 ビードワイヤ
13 ビードワイヤ束
14 結束糸
15 (ビードワイヤの)巻き始め端部
16 (ビードワイヤの)巻き終わり端部
17 段差部
18 巻き始め端部の端面
20 糸巻き装置
21a,21b 支持ローラ
23 糸供給装置
24 糸巻出装置
25 掴み部
26 糸切断部
30 巻き付け装置
31 切欠溝部
32 凹溝
33 ガイド部
40 制御装置
41 センサ
Claims (8)
- 一本のビードワイヤを複数回巻き回すことにより環状に形成したビードワイヤ束を支持ローラによって前記ビードワイヤ束の周方向に回転させつつ、巻き付け装置を前記ビードワイヤ束の断面周方向に回転させることにより、前記ビードワイヤ束に結束糸を螺旋状に巻き付ける糸巻き工程を有するビードの製造方法において、
前記ビードワイヤ束におけるビードワイヤの巻き始め端部によって生じる段差部に結束糸を巻き付ける間、前記支持ローラの回転速度が前記段差部以外の領域に結束糸を巻き付ける場合に比して遅くなるように前記支持ローラの回転速度を制御するか、又は、前記巻き付け装置の回転速度が前記段差部以外の領域に結束糸を巻き付ける場合に比して速くなるように前記巻き付け装置の回転速度を制御するか、少なくともいずれか一方の制御を行うことにより、前記段差部以外の領域に比して小さいピッチで前記結束糸を巻き付けることを特徴とするビードの製造方法。 - 前記糸巻き工程において、
結束糸の巻き付け開始位置から前記段差部の端部までの距離を前記ビードワイヤ束が回転するのに要する時間を予め算出し、
前記ビードワイヤ束への結束糸の巻き付け開始時刻から前記時間が経過したならば前記制御を行うことを特徴とする請求項1に記載のビードの製造方法。 - 前記糸巻き工程において、
結束糸の巻き付け開始位置から前記段差部の端部までの距離を予め算出し、
前記ビードワイヤ束が前記巻き付け開始位置から前記距離だけ回転したならば前記制御を行うことを特徴とする請求項1に記載のビードの製造方法。 - ビードワイヤの巻き始め端部を検出するセンサを所定位置に配置し、
前記糸巻き工程において、前記センサの検出結果に基づいて前記制御を行うことを特徴とする請求項1に記載のビードの製造方法。 - 一本のビードワイヤを複数回巻き回すことにより環状に形成したビードワイヤ束を、ビードワイヤ束の周方向に回転可能に支持する支持ローラと、
前記支持ロールに支持されるビードワイヤ束の断面周方向に回転しながら前記ビードワイヤ束に結束糸を巻き付ける巻き付け装置とを備え、
前記支持ローラにより前記ビードワイヤ束を回転させつつ前記巻き付け装置を回転させることにより、前記ビードワイヤ束に結束糸を螺旋状に巻き付けるように構成された糸巻き装置を有するビードの製造装置において、
前記糸巻き装置は、
前記支持ローラを回転させる第1の駆動装置と、
前記巻き付け装置を回転させる第2の駆動装置と、
前記第1の駆動装置及び第2の駆動装置を制御する制御装置と、を備え、
前記制御装置は、
前記巻き付け装置が、前記ビードワイヤ束におけるビードワイヤの巻き始め端部によって生じる段差部に結束糸を巻き付ける間、前記支持ローラの回転速度を前記段差部以外の領域に巻き付ける場合に比して遅くするように前記第1の駆動装置を制御するか、又は、前記巻き付け装置の回転速度を前記段差部以外の領域に巻き付ける場合に比して速くするように前記第2の駆動装置を制御するか、少なくともいずれか一方の制御を行うことにより、前記段差部以外の領域に比して小さいピッチで前記結束糸を巻き付けるようにしたことを特徴とするビードの製造装置。 - 前記制御装置は、
結束糸の巻き付け開始位置から前記段差部の端部までの距離を前記ビードワイヤ束が回転するのに要する時間を予め算出し、
前記ビードワイヤ束への結束糸の巻き付け開始時刻から前記時間が経過したならば前記制御を行うことを特徴とする請求項5に記載のビードの製造装置。 - 前記制御装置は、
結束糸の巻き付け開始位置から前記段差部の端部までの距離を予め算出し、
前記ビードワイヤ束が前記巻き付け開始位置から前記距離だけ回転したならば前記制御を行うことを特徴とする請求項5に記載のビードの製造装置。 - ビードワイヤの巻き始め端部を検出するセンサを備え、
前記制御装置は、
前記センサの検出結果に基づいて前記制御を行うことを特徴とする請求項5に記載のビードの製造装置。
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JP2016022642A (ja) * | 2014-07-18 | 2016-02-08 | 住友ゴム工業株式会社 | ビードコアの糸巻装置 |
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JP2016022642A (ja) * | 2014-07-18 | 2016-02-08 | 住友ゴム工業株式会社 | ビードコアの糸巻装置 |
WO2019220046A1 (fr) * | 2018-05-14 | 2019-11-21 | Compagnie Generale Des Etablissements Michelin | Installation et procédé de triage de tringles pour pneumatiques, avec controle d'azimut |
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CN112105497B (zh) * | 2018-05-14 | 2022-11-25 | 米其林集团总公司 | 用于分配胎圈芯线的具有方位角控制的系统和方法 |
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