JP5129838B2 - Winding device for belt-shaped member for tire - Google Patents

Description

The present invention relates to a winding device for a belt-shaped member for a tire that forms a cylindrical wound body by winding a belt-shaped member for a tire that has been cut to a certain length in the length direction around the outer peripheral surface of a forming drum.

  For example, when a belt-shaped member such as a carcass ply, a belt ply, or an inner liner rubber is wound around a molding drum at the time of forming a raw tire, conventionally, the belt-shaped member is cut to a length corresponding to the circumferential length of the molding drum in advance. By supplying the strip-shaped member cut to a fixed size to the forming drum using an affixing conveyor, a wound body of the strip-shaped member is formed by joining both ends in the length direction (for example, Patent Document 1, 2).

  However, since the band-shaped member is formed mainly of unvulcanized rubber, it can be expanded and contracted in the length direction. Therefore, although it is cut at a constant size, its accuracy is not sufficiently high, and the length of the band-shaped member varies. Sticking easily occurs. Therefore, for example, the band-shaped member is too short with respect to the forming drum, the joint amount between the end portions (the overlap width between the end portions) is insufficient, and the bonding strength is impaired. There is a problem that it becomes excessive and adversely affects the appearance quality.

  Therefore, in the past, for those that are not properly jointed, the rear end side of the band-shaped member is once peeled off, and the peeled portion is stretched or reattached while being compressed by the operator's hands. . However, in the re-sticking operation, since the correction of the joint amount is concentrated at the re-sticking portion, the thickness of the re-sticking portion and the code arrangement density are different from other portions, and the uniformity is reduced. There is a problem.

JP 7-164556 A JP 2003-62916 A

Therefore, the present invention is based on the fact that the length of the strip-shaped member cut to a certain size is actually measured on an affixing conveyor, and based on the measured value, the drum diameter of the molding drum is changed to adjust the joint amount. A belt-like member for a tire that can efficiently form a wound member of a belt-like member with a constant joint amount without causing unevenness of the member thickness and cord arrangement density, and can improve tire quality. The object is to provide a winding device .

According to the first aspect of the present invention, the belt-shaped member for a tire that has been cut in the length direction is wound once on the outer peripheral surface of the molding drum, and the belt-shaped member is joined between both end portions in the length direction. A device for winding a belt-like member for a tire that forms a cylindrical wound body of the above-mentioned, wherein a long belt-like member before cutting is transported and arranged to be movable in the width direction of the belt-like member A connecting conveyor for centering the band-shaped member by cutting, and cutting the band-shaped member at a predetermined angle with respect to the length direction by traversing the centered band-shaped member disposed on the downstream side of the connecting conveyor in the width direction cutting means and, comprises a plurality of segments arranged along the circumferential direction and freely change of the drum diameter by moving the segments radially out with a cutting blade that Ur with a molding drum which is rotated by a drum axis around, equal to the conveying speed Vc and disposed and having the cut peripheral velocity Vd of the belt-shaped member and the forming drum between said forming drum and said cutting means Prior to feeding the belt-like member to the molding drum, the length Lp of the belt-like member on the pasting conveyor. And a joint control means for controlling the joint amount by changing the drum diameter of the molding drum based on the length Lp by the measurement means prior to the supply of the belt-like member to the molding drum. It is characterized by comprising.

According to a second aspect of the present invention, the measuring means is arranged at a distance L0 in the front and rear direction in the transport direction, and a sensor before detecting the front end of the belt-like member being transported and a rear end of the belt-like member. It is characterized by comprising the sensor.

According to a third aspect of the present invention, the affixing conveyor has a pivot point on the rear end side in the conveying direction, and is pivotally supported so that the front end side can be tilted up and down around the pivot point. The belt-shaped member to be conveyed is pressed against the forming drum and attached by tilting.

  In the present invention, as described above, a band-shaped member cut to a predetermined size is supplied to the molding drum from the lower side of the molding drum and pasted using a pasting conveyor. In this case, the lower surface of the belt-like member can be supported by the sticking conveyor until the belt-like member contacts and sticks to the forming drum. Therefore, it is possible to prevent deformation and dimensional change when the belt-shaped member moves from the sticking conveyor to the forming drum. In addition, since the conveying speed Vc of the affixing conveyor and the peripheral speed Vd of the forming drum are the same, the dimensions are kept in the conveying state, that is, they are wound around the forming drum without causing unevenness in thickness, code arrangement density, and the like. Can do. If there is a speed difference between the conveyance speed Vc and the circumferential speed Vd, the belt-shaped member extends (or contracts) according to the speed difference. At this time, the extension (or contraction) is not uniform. It tends to appear as unevenness and tends to impair uniformity.

  Moreover, in this invention, the length of a strip | belt-shaped member is measured on a sticking conveyor, and the drum diameter of a forming drum is changed based on the measured value. That is, the circumference of the forming drum is changed in accordance with the actual length of the belt-shaped member. Therefore, the joint amount can be appropriately adjusted while maintaining the effects of uniformity such as the thickness and the code arrangement density described above, and the wound body of the belt-shaped member with a constant joint amount can be formed accurately and efficiently. be able to.

It is a side view which shows notionally one Example of the winding apparatus of the strip | belt-shaped member for tires of this invention. It is a top view which shows the principal part. It is sectional drawing along the drum axial center which shows an example of a shaping | molding drum. It is sectional drawing of the direction orthogonal to the drum axis which shows the change of the drum diameter of a forming drum. (A)-(C) are the conceptual diagrams which show the winding method. It is sectional drawing which shows the amount of joints. It is an effect | action figure which shows the advantage by performing centering in the upstream of a cutting | disconnection means.

Hereinafter, embodiments of the present invention will be described in detail.
1 and 2, a belt-like member winding device 1 (hereinafter referred to as a winding device 1) for a tire according to the present embodiment is cut in a lengthwise direction with a forming drum 2 capable of changing a drum diameter D. An affixing conveyor 3 for supplying and adhering a belt-like member P for tire to the forming drum 2, a measuring means 4 for measuring the length Lp of the abdominal member P on the affixing conveyor 3, and a measured belt-like member Joint control means 5 for controlling the joint amount J (shown in FIG. 6) by changing the drum diameter D of the forming drum 2 based on the length Lp of P is provided.

  In this example, on the upstream side of the winding device 1, a let-off device 6 for supplying a long strip-shaped member P0 before sizing and a strip for cutting the strip-shaped member P0 from the let-off device 6 by sizing. A means 7 is arranged and constitutes a part of the raw tire forming line together with the winding device 1.

  The let-off device 6 includes a reel body 8 obtained by winding the long belt-like member P0 in a roll shape, and a long belt-like member P0 drawn out from the reel body 8 via the festoon F on the side of the sticking conveyor 3 And an unloading conveyor 9 for unloading. The reel body 8 is pivotally supported by a reel stand (not shown) so that the belt-like member P0 can be unwound freely, and on the downstream side of the reel body 8, a release sheet 10a wound with the belt-like member P0. A collection roller 10 that collects the toner is disposed.

  In this example, the carry-out conveyor 9 includes a festoon guide 12 that forms a festoon F with a guide roller 11, and a transfer conveyor 13 that bridges the festoon guide 12 and the affixing conveyor 3 so as to be connected. With. In this example, the festoon guide 12 is a roller conveyor in which conveyor rollers are arranged in an arc shape, and smoothly guides the belt-shaped member P from the festoon F. The transfer conveyor 13 is a belt conveyor in this example, and is arranged so as to be movable in a direction perpendicular to the conveying direction, that is, in the width direction of the belt-like member P. Thereby, it can transfer to the sticking conveyor 3, performing centering with respect to the strip | belt-shaped member P which is connected from the said festoon guide 12. FIG.

  The cutting means 7 has a well-known structure, and has a cutting blade 7a for cutting the belt-like member P at a predetermined angle with respect to the length direction by crossing between the transfer conveyor 13 and the affixing conveyor 3 in the width direction. Have. In addition, a detection sensor 14 for sizing cutting is arranged at a predetermined position of the affixing conveyor 3, and the front end Pf of the long belt-like member P0 that is carried into the affixing conveyor 3 through the carry-out conveyor 9, When the detection sensor 14 detects, the carry-out conveyor 9 and the pasting conveyor 3 are stopped. In this stopped state, by operating the cutting means 7, the belt-like member P can be cut at a fixed length determined by the attachment position of the detection sensor 14. In this example, since the centering is performed on the upstream side of the cutting means 7, the cutting angles of the front end Pf and the rear end Pr of the belt-like member P can be matched with each other. Accordingly, at the time of jointing, for example, as shown in FIG. 7, the cutting angle becomes inconsistent, so that the joint amount J changes in the width direction without the front end Pf and the rear end Pr being parallel in the joint portion, It is possible to avoid the problem of causing poor bonding.

  Next, the forming drum 2 of the winding device 1 is rotationally driven around the drum axis by a drive motor (not shown). As shown in FIG. 4, the forming drum 2 includes a plurality of segments 15 arranged in the circumferential direction, and the segments 15 are moved inward and outward in the radial direction by the expansion / contraction diameter means 16 (shown in FIG. 3). By doing so, the drum diameter D can be freely changed.

  Specifically, as shown in FIG. 3, the forming drum 2 includes a central shaft portion 19 including a support shaft 17 that is motor-driven and a holding cylinder 18 that is attached to the support shaft 17 so as to be integrally rotatable. Have. The expansion / contraction diameter means 16 is attached to the holding cylinder 18 so as to be slidably moved in the drum axial direction, and the segments 15 are attached to the slide fitting 20 at the radially outer ends. And a plurality of radially moving pieces 21 that can move in the radial direction.

  The slide fitting 20 is formed of a cone-shaped ring body having an outer peripheral surface that is a tapered surface portion 20S inclined inward in the radial direction toward one side in the drum axis direction. In this example, the drum axis using a ball screw mechanism is used. It can be slid by the direction moving means 22. In addition, between the slide metal fitting 20 and the holding | maintenance cylinder 18 is prevented, for example using the key etc. The holding cylinder 18 is provided with a disk-shaped side wall portion 18A that rises in the radial direction from a side end on one side in the drum axis direction, and a guide groove, for example, on the side surface on the other side in the drum axis direction. A plurality of guide portions 18A1 are formed radially in the radial direction.

  The radial moving piece 21 has a side end on one side in the drum axial direction guided in the radial direction by the guide portion 18A1, and the radially inner end portion and the tapered surface portion 20S of the slide fitting 20 are: In this example, it is engaged via the linear bearing 24 along the inclination of the tapered surface portion 20S.

  The drum shaft direction moving means 22 includes a motor M attached to a side plate 25 fixed to the central shaft portion 19 so as to be integrally rotatable, and a screw shaft 26 having one end connected to the output shaft and extending in the drum shaft direction. And a nut fitting 27 that is fixed to the slide fitting 20 and that can be screwed onto the screw shaft 26.

  Therefore, the expansion / contraction diameter means 16 controls the motor M to control the number of rotations (including the rotation angle) and the rotation direction, thereby moving the segment 15 in the radial direction via the slide fitting 20 and the moving piece 21. The drum diameter D of the forming drum 2 can be freely changed and adjusted.

  Next, as shown in FIG. 1, the affixing conveyor 3 conveys the strip-shaped member P that has been cut to a certain length in the length direction at a conveying speed Vc that is equal to the peripheral speed Vd of the forming drum 2, and Supplying and pasting the molding drum 2 from below the molding drum 2. Specifically, the affixing conveyor 3 is a belt conveyor, and has a pivot point Q on the rear end side in the conveying direction, and is pivotally supported so that the front end side can tilt up and down around the pivot point Q.

  In this example, the front end portion of the affixing conveyor 3 is supported on the upper end of a rod of a cylinder 30 whose lower end is attached to the frame 29 of the winding device 1, and the affixing conveyor 3 is tilted upward by the extension of the rod. The conveying surface can be pressed against the forming drum 2. Therefore, when the belt-like member P is sent, the belt-like member P can be pressed against the outer peripheral surface of the forming drum 2 and pasted. The pressing force can be adjusted by the operating pressure on the cylinder 30. Further, since the affixing conveyor 3 can be tilted up and down, the drum diameter D of the molding drum 2 can be changed while maintaining the pressing state with the molding drum 2.

Next, the measuring means 4 measures the length Lp of the belt-like member P on the affixing conveyor 3 as shown in FIGS. 5 (A) and 5 (B). In this example, the measuring unit 4 includes front and rear sensors 31F and 31R arranged at a distance L0 before and after in the transport direction. The front sensor 31F detects the front end Pf of the belt-like member P being transported, and the rear sensor 31R detects the rear end Pr of the belt-like member P being transported. Therefore, by measuring the time difference Δt between the detection of the front end Pf by the front sensor 31F and the detection of the rear end Pr by the rear sensor 31R, from this time difference Δt, the transport speed Vc, and the interval L0, The actual length Lp of the belt-like member P being conveyed can be measured by the following equation (1). Of course, when the detection of the rear end Pr is earlier than the detection of the front end Pf, the time difference Δt is displayed as a negative value.
Lp = L0 + Δt × Vc −−− (1)

Next, the joint control means 5 changes the drum diameter D of the forming drum 2 on the basis of the length Lp (measured value) of the belt-like member P by the measuring means 4, and between the end portions Pf and Pr. The joint amount J, which is the overlap width, is controlled. Specifically, an appropriate joint amount J required for winding is set in advance, and the drum diameter D is adjusted so that the circumferential length of the forming drum 2 becomes (Lp−J). That is, as shown in FIG. 3, the motor M is controlled so that the drum diameter D is expressed by the following equation (2).
D = (Lp−J) / π −−− (2)

  Accordingly, the belt-like member P can be wound around the forming drum 2 with the same dimensions as in the transported state without any unevenness of expansion and contraction, and when the length of the belt-like member P varies, Absorption is achieved by adjusting the diameter D, and the joint amount J can be kept constant at a desired value.

  The joint control means 5 does not need to calculate the drum diameter D satisfying the expression (2). For example, when the length of the belt-like member P coincides with the interval L0, a drum with an appropriate joint amount J can be obtained. The diameter Do is set as the reference drum diameter Do. Then, the time difference Δt is used in place of the length Lp, and the correction value ΔD = (Δt × Vc) / π obtained from the time difference Δt is increased or decreased with respect to the reference drum diameter Do to reduce the drum diameter D. It can also be adjusted.

  Next, in the winding method of the belt-like member P, as shown in FIG. 5, the belt-like member P is lengthened at a transport speed Vc equal to the peripheral speed Vd of the molding drum 2 using the sticking conveyor 3. The belt-shaped member P is fed to the molding drum 2 from the lower side of the molding drum 2 and attached to the molding drum 2 (conveyance supply step S1). At this time, by pressing the conveying surface of the affixing conveyor 3 toward the forming drum 2, the belt-like member P can be affixed and wound around the forming drum with the dimensions of the conveyed state.

  In the winding method, prior to the supply of the belt-like member P to the forming drum 2, the length Lp of the belt-like member P is measured on the affixing conveyor 3 (measurement step S2) and the measured length is measured. Based on Lp, the joint diameter J is adjusted by changing the drum diameter D of the forming drum 2 (joint control step S3). In the measurement step S2, it is more preferable to measure the length Lp of the belt-like member P in the transported state in order to adjust the joint amount J. In FIG. 5, for the sake of convenience, the affixing conveyor 3 is shown separated from the forming drum 2. The forming drum 2 may be driven after the joint control step S3 is performed (that is, after the drum diameter D is changed), or may be started before the joint control step S3.

  As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

DESCRIPTION OF SYMBOLS 1 Winding apparatus 2 Forming drum 3 Sticking conveyor 4 Measuring means 5 Joint control means 15 Segment 31F, 31R Front and rear sensor D Drum diameter PA Strip member Pf Tip Pr Rear end Q Pivot point

Claims (3)

A cylindrical wound body of the belt-shaped member obtained by winding a belt-shaped member for a tire that has been cut in the length direction on the outer peripheral surface of the molding drum and jointing between both ends in the length direction. A device for winding a belt-shaped member for a tire to form,
A transit conveyor that performs centering on the belt-shaped member by transporting a long belt-shaped member before cutting and moving the belt-shaped member in the width direction of the belt-shaped member;
A cutting means having a cutting blade which is arranged on the downstream side of the transit conveyor and cuts the strip member at a predetermined angle with respect to the length direction by traversing the centered strip member in the width direction;
A molding drum having a plurality of segments arranged along the circumferential direction and capable of freely changing the diameter of the drum by moving each segment inward and outward in the radial direction , and rotationally driven around the drum axis;
The strip-shaped member that is arranged between the cutting means and the forming drum and is cut is transported in the length direction at a transport speed Vc equal to the peripheral speed Vd of the forming drum, and from the lower side to the forming drum. An affixing conveyor to supply and affix ,
Prior to the supply of the band-shaped member to the forming drum, measuring means for measuring the length Lp of the band-shaped member on the pasting conveyor;
And characterized by comprising a joint control means prior to the supply of the belt-shaped member, said the changing the drum diameter before Symbol forming drum based on the length Lp by measuring means for controlling the joint of the said forming drum A device for winding a belt-like member for a tire. The measurement means includes a sensor before detecting the leading end of the belt-like member being transported and a sensor after detecting the rear end of the belt-like member , which are arranged at an interval L0 before and after in the transport direction. 2. A belt-like member winding device for a tire according to claim 1, wherein The affixing conveyor has a pivot point on the rear end side in the conveying direction, and is pivotally supported so that the front end side can be tilted up and down around the pivot point, and is conveyed by the upward tilting. The apparatus for winding a belt-shaped member for a tire according to claim 1 or 2 , wherein the belt is pressed against a molding drum .

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