JP2007062083A - Tire molding drum and lamination method of tire constituent members due to tire molding drum - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire molding drum preventing the occurrence of air sumps between tire members, causing no deterioration of laminating precision, improving workability at the time of lamination, and reducing manufacturing trouble, and also to provide a winding method of tire constituent members. <P>SOLUTION: The drum main body 1 of the tire molding drum is constituted by arranging a plurality of plates divided in the peripheral direction R of the drum in a cylindrical shape and dividing the drum width direction L of the plates 2 into a plurality of parts. Expansion and contraction means 3 for expanding, contracting and fixing the plates 2 in a diametric direction are respectively provided inside of a plurality of the plates 2 divided in the drum peripheral direction R and the drum width direction L and connected to the drive source provided to a drum center axis part 4. The respective plates 2 is diametrically expanded by a predetermined height at an arbitrary position in the drum width direction L by the expansion and contraction means 3 and, as the expansion and contraction means 3, the fluid cylinder of oil pressure or air pressure connected to a fluid supply source is used. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tire forming drum and a method for attaching a tire constituent member using the tire forming drum, and more specifically, in a band forming step of a tire forming step, a plurality of tire constituent members are sequentially wound and attached to the band forming drum. The present invention relates to a tire molding drum capable of improving workability at the time of matching and reducing molding accuracy and manufacturing failure, and a method of attaching a tire constituent member using the tire molding drum.

In general, in a tire molding process of a pneumatic tire for automobiles, particularly in a band molding process, a method of sequentially sticking a side member, a liner, a side reinforcing material, a carcass etc. on an expandable / contractible cylindrical band molding drum is performed. Yes.
However, when each member is wound in a state of being sequentially stacked, as shown in FIG. 8, the unevenness G on the surface gradually increases depending on the thickness of each member Wa, Wb, Wc, Wd, etc. Therefore, it becomes difficult to wrap and paste the next member. For this reason, there is a problem that air is trapped between the members, the bonding accuracy is deteriorated, the bonding portion of the member terminal portion is opened, and further, a manufacturing failure is caused by disturbance of the carcass end.

  Therefore, as shown in FIG. 9, a tire assembly drum that attempts to smooth the surface of the wound member by expanding and contracting the drum segment D in which a recessed portion G ′ approximately matched to the shape of the wound member is formed in advance. Has been proposed (for example, Patent Document 1).

  However, in the case of the drum segment D in which the concave portion G ′ is formed in advance, there is a problem that the shape cannot be changed due to the member and the size cannot be shared. There is a problem that the member to be applied cannot be applied on a smooth surface, and a preferred member and a sacrificial member are inevitably generated, resulting in support for the member attaching operation.

  This invention pays attention to such a conventional problem, and when applying a plurality of tire constituent members to the surface of the drum body one after another, it can always be applied to a smooth surface, causing air accumulation between the members, or bonding. Provided is a tire molding drum capable of improving workability at the time of bonding without reducing accuracy and reducing molding accuracy and manufacturing failure, and a method of winding a tire component using the tire molding drum. It is for the purpose.

  In order to achieve the above-mentioned object, the tire molding drum of the present invention is a tire molding drum in which a plate divided into a plurality of portions in the circumferential direction of the drum is arranged in a cylindrical shape and a drum width direction of the plate is divided into a plurality of portions. In each of the plurality of plates divided in the drum circumferential direction and the drum width direction, expansion / contraction means for expanding / contracting each plate in the radial direction is provided, and each expansion / contraction means is provided in the central shaft portion of the drum. The gist is that it is connected to a drive source.

  Here, the diameter of each of the plates is increased by a predetermined height at an arbitrary position in the drum width direction by the expansion / contraction means, and the expansion / contraction means is connected to a fluid cylinder connected to a fluid supply source or a rotary drive device. Link mechanism.

  In addition, the length of each of the divided plates in the drum width direction is such that the width at the center of the drum is large, and the both end sides of the drum are formed small so as to follow the member shape, and the drum circumferential direction and the drum width direction A cover member that can be expanded and contracted is provided on the surface of a plurality of divided plates. Further, the peripheral edge of each plate is chamfered.

  Further, the method of winding the tire component using the tire forming drum according to the present invention is a part of the smooth surface of the drum body in which a plurality of plates divided in the drum circumferential direction and the drum width direction are arranged in a cylindrical shape. The first tire constituent member having a profile shape with a predetermined width and a predetermined thickness is pasted, and then the surface of the drum body and the surface of the first tire constituent member are smooth when the next tire constituent member is pasted. As described above, the plurality of divided plates at the recessed position are expanded through expansion / contraction means, and the surface of the drum body and the surface of the first tire component are smoothed, and the next tire component The gist is to apply the necessary number of tire components sequentially by repeating such an operation.

  Here, when the diameter of the plurality of divided plates at the recessed position is expanded via the expansion / contraction means so that the surface of the drum body and the surface of the first tire component member are smooth, a smooth reference plate Can be used to smooth the surface of the drum body and the surface of the first tire component.

  Further, another method of winding a tire constituent member using a tire forming drum according to the present invention is that a plurality of plates divided in the drum circumferential direction and the drum width direction are arranged on a smooth surface of a drum body in a cylindrical shape. When sequentially attaching the tire constituent members, the profile shape of the drum body surface for each tire constituent member is stored in the control device in advance, and when sequentially attaching the plurality of tire constituent members, the control device stores them. Based on the profile shape, the gist is to sequentially stick the tire constituent members while expanding the diameter of the plurality of plates through the expansion / contraction means so that the surface of the drum body and the surface of the tire constituent members are always smooth. is there.

Here, it is also possible to sequentially stick a plurality of tire constituent members in a state where a cover member that can be expanded and contracted is covered on the smooth surface of the drum body.
By comprising in this way, when sticking a plurality of tire constituent members on the surface of the drum body one after another, it can always be stuck on a smooth surface, and air accumulation occurs between the members, or the bonding accuracy deteriorates. The workability at the time of bonding can be improved, and the molding accuracy and manufacturing failure can be reduced.

  Since the present invention is configured as described above, when a plurality of tire constituent members are sequentially attached to the surface of the drum body, the tire constituent members can always be attached on a smooth surface. Air accumulation does not occur, the bonding accuracy can be improved, the opening of the bonding part of the member terminal part can be prevented, and further the cause of manufacturing failure due to carcass end disturbance etc. can be prevented in advance. There is an effect that the workability at the time of bonding can be improved and the molding accuracy and the manufacturing failure can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows a schematic configuration diagram of a tire molding drum embodying the present invention. The drum body 1 of the tire molding drum has a plurality of drum bodies 1 in the drum circumferential direction R (in this embodiment, there are 12 divisions. The plate 2 divided into (not particularly limited) is arranged in a cylindrical shape, and the drum width direction L of the plate 2 is divided into a plurality of portions.

  Inside the plurality of plates 2 divided in the drum circumferential direction R and the drum width direction L, as shown in FIGS. 2 to 4, each plate 2 is expanded and contracted in the radial direction, and has a fixing function. Each expansion / contraction means 3 is provided, and each expansion / contraction means 3 is connected to a drive source (not shown) provided in the drum central shaft portion 4.

  Each plate 2 can be expanded in diameter by a predetermined height at an arbitrary position in the drum width direction L by the expansion / contraction means 3, and the expansion / contraction means is a hydraulic pressure connected to a fluid supply source in this embodiment. However, it is also possible to provide a rotary drive device (not shown) in the drum central shaft portion 4 and connect it to this rotary drive device.

  Further, the length of each of the divided plates 2 in the drum width direction L is preferably such that the drum width center portion S1 has a large width and the drum both end sides S2 are formed small enough to follow the member shape. The narrowest plate 2 is formed to have a width of 8 to 12 mm and is easy to follow the member shape.

  Further, the peripheral edge 2a of each plate 2 is chamfered as shown in FIG. 5 so that the edge of each plate 2 can be eliminated and the tire constituent members can be wound and bonded on a smooth surface. As shown in FIG. 6, it is also possible to cover with an extendable cover member 5 such as a rubber sheet.

Next, a method for attaching tire constituent members using the tire forming drum as described above will be described with reference to FIGS.
In the embodiment of the present invention, a tire constituent member composed of a side member Wa, a liner Wb, a side reinforcing material Wc, and a carcass Wd is sequentially pasted on a cylindrical band forming drum that can be expanded and contracted in the same manner as in the past. explain.

  First, the tire member adhering method according to the first embodiment of the present invention is a cylindrical arrangement of a plurality of plates 2 divided in the drum circumferential direction R and the drum width direction L as shown in FIG. The first tire constituent member (side member Wa) having a profile shape with a predetermined width and a predetermined thickness is attached to a part of the smooth surface of the drum body 1 provided, and then the next shown in FIG. When the tire constituent member (liner Wb) is affixed, the concave portion is formed so that the surface of the drum body 1 and the surface of the first tire constituent member (side member Wa) are smooth as shown in FIG. The plurality of plates 2 divided at the positions are expanded through the expansion / contraction means 3.

  Then, with the surface of the drum body 1 and the surface of the first tire constituent member (side member Wa) being smooth, the next tire constituent member (liner Wb) is pasted, and such an operation is repeated to repeat FIG. As shown in (g) to (g), a necessary number of tire constituent members (side reinforcing material Wc, carcass Wd) are sequentially pasted to perform the work.

  In FIG. 7 (d), a plurality of divided sheets at the recessed positions are smoothed so that the surfaces of the first tire constituent member (side member Wa) and the next tire constituent member (liner Wb) are smooth. The diameter of the plate 2 is expanded through the expansion / contraction means 3.

  Moreover, in FIG.7 (e) and FIG.7 (f), a tire structural member (side reinforcement material Wc) is bonded on the tire structural member (side member Wa, liner Wb) which became the smooth surface, and tire The plurality of divided plates 2 at the recessed positions are expanded through the expansion / contraction means 3 so that the surfaces of the constituent members (side member Wa, liner Wb, side reinforcing material Wc) are smooth.

  Then, as shown in FIG. 7G, the tire constituent member (carcass Wd) is bonded to the surface of the tire constituent member (side member Wa, liner Wb, side reinforcing material Wc) whose surface is finally smoothed. To finish the work.

  In addition, the surface of the drum main body 1 and the surface of the first tire constituent member (side member Wa, liner Wb, side reinforcing material Wc, carcass Wd) are divided into a plurality of divided pieces at the recessed position. When the diameter of the plate 2 is expanded via the expansion / contraction means, the surface of the drum body 1 and the first tire constituent members (side member Wa, liner Wb, side reinforcing material Wc, carcass Wd) are used by using a smooth reference plate (not shown). The surface can be smoothed.

  By such a method, when a plurality of tire constituent members are sequentially attached to the surface of the drum body 1, the tire constituent members can always be attached on a smooth surface, and as a result, an air pocket is generated between the members. There is no, and it can improve the pasting accuracy.

  Next, in the second embodiment of the present invention, the tire constituent member is affixed to the smooth surface of the drum body 1 in which a plurality of plates 2 divided in the drum circumferential direction and the drum width direction are arranged in a cylindrical shape. When sequentially pasting a plurality of tire constituent members, the profile shape of the surface of the drum body 1 for each tire constituent member is stored in advance in a control device (not shown), and when the plurality of tire constituent members are sequentially pasted, control is performed. Based on the profile shape memorized in the device, the diameter of a plurality of plates is expanded through expansion / contraction means, and the tire constituent members are sequentially pasted while the surface of the drum body and the surface of the tire constituent member are always in a smooth state. is there.

  In this way, when the tire components are sequentially pasted using the control device in which the profile shape is stored in advance, by automatically operating the expansion / contraction means, the tire components can be efficiently and accurately handled without human intervention. It is possible to stick well.

  In addition, by sequentially attaching a plurality of tire constituent members in a state where the extendable cover member 5 is put on the smooth surface of the drum body, the edges of the plates 2 are eliminated, and the tire constituent members are made smooth. It can be wound and pasted together.

  Since other configurations and operations are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.

It is a schematic block diagram of the tire shaping | molding drum which implemented this invention. It is a partially expanded perspective view of the X section of FIG. It is a partial expanded sectional view of the X section of FIG. It is AA arrow sectional drawing of FIG. It is a partially expanded front view which shows other embodiment of the plate which comprises a drum main body. It is a partially expanded front view which shows other embodiment which covers a cover member on the plate which comprises a drum main body. (A)-(g) is explanatory drawing of the process of sticking a tire structural member on the tire shaping | molding drum of this invention. It is explanatory drawing of the process of sticking a tire structural member on the conventional tire shaping | molding drum. It is explanatory drawing of the conventional tire shaping | molding drum.

Explanation of symbols

Wa Side member Wb Liner Wc Side reinforcement material Wd Carcass
G Concavity and convexity G 'Recessed portion D Drum segment
1 Drum body 2 Plate
3 Expansion / contraction means 4 Drum center shaft
5 Cover member 2a Edge of plate
R Drum circumferential direction L Drum width direction S1 Drum width center S2 Drum both ends

Claims (11)

A tire molding drum in which a plate divided into a plurality in the drum circumferential direction is arranged in a cylindrical shape, and a drum width direction of the plate is divided into a plurality of parts,
Inside the plurality of plates divided in the drum circumferential direction and the drum width direction, expansion / contraction means for expanding / contracting each plate in the radial direction is provided, and each expansion / contraction means is provided at the drum central shaft portion. A tire forming drum characterized by being connected to the tire. 2. The tire forming drum according to claim 1, wherein the diameter of each of the plates is increased by a predetermined height at an arbitrary position in the drum width direction by the expansion / contraction means. The tire forming drum according to claim 1 or 2, wherein the expansion / contraction means is a fluid cylinder connected to a fluid supply source. The tire forming drum according to claim 1 or 2, wherein the expansion / contraction means is a link mechanism connected to a rotation drive device. 5. The length of each of the divided plates in the drum width direction is formed such that the width of the drum width center portion is increased and the both end sides of the drum are formed small so as to follow the member shape. Tire molding drum. The tire forming drum according to claim 1, 2, 3, 4 or 5, wherein a peripheral edge portion of each plate is chamfered. The tire molding drum according to claim 1, 2, 3, 4, 5 or 6, wherein a cover member capable of expansion and contraction is provided on the surface of a plurality of plates divided in the drum circumferential direction and the drum width direction. The first tire configuration having a profile shape with a predetermined width and a predetermined thickness on a part of a smooth surface of a drum body in which a plurality of plates divided in a drum circumferential direction and a drum width direction are arranged in a cylindrical shape When a member is pasted and then the next tire component is pasted, the plurality of divided plates at the recessed position are scaled so that the surface of the drum body and the surface of the first tire component are smooth. The diameter of the tire is expanded through the means, the next tire component is pasted in a state where the surface of the drum body and the surface of the first tire component are smoothed, and such operations are repeated to obtain the necessary number of tire components. A method for attaching tire constituent members by a tire forming drum, wherein the tire forming drums are attached sequentially. When expanding the diameter of the plurality of divided plates at the recessed positions via the expansion / contraction means so that the surface of the drum body and the surface of the first tire component member are smooth, a smooth reference plate is used. The method for attaching a tire component using a tire molding drum according to claim 8, wherein the surface of the drum body and the surface of the first tire component are smoothened. When a plurality of tire constituent members are sequentially pasted on a smooth surface of a drum main body in which a plurality of plates divided in a drum circumferential direction and a drum width direction are arranged in a cylindrical shape, the drum main body surface in advance for each tire constituent member The profile shape is stored in the control device, and when a plurality of tire constituent members are sequentially pasted, the plurality of plates are always expanded through the expansion / contraction means based on the profile shape stored in the control device. A method for attaching a tire constituent member using a tire forming drum, wherein the tire constituent members are attached in order while keeping the surface of the drum body and the surface of the tire constituent member smooth. The method for attaching a tire constituent member using a tire forming drum according to claim 8, 9 or 10, wherein a plurality of tire constituent members are sequentially attached in a state in which a stretchable cover member is covered on a smooth surface of the drum body.

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