JP2022076897A - Device for producing tire - Google Patents

Device for producing tire Download PDF

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Publication number
JP2022076897A
JP2022076897A JP2020187548A JP2020187548A JP2022076897A JP 2022076897 A JP2022076897 A JP 2022076897A JP 2020187548 A JP2020187548 A JP 2020187548A JP 2020187548 A JP2020187548 A JP 2020187548A JP 2022076897 A JP2022076897 A JP 2022076897A
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Prior art keywords
tire
sealing agent
rotation axis
rotating plate
nozzle
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Japanese (ja)
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寿治 芝野
Toshiharu Shibano
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Toyo Tire Corp
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Toyo Tire Corp
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Priority to JP2020187548A priority Critical patent/JP2022076897A/en
Publication of JP2022076897A publication Critical patent/JP2022076897A/en
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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)
    • B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
    • B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
    • 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)
    • B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
    • B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
    • B29D2030/0686—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre
    • B29D2030/0694—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre the sealant being in the form of one or more narrow strips, e.g. applied by winding into the interior of the tyre

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Coating Apparatus (AREA)
  • Tyre Moulding (AREA)

Abstract

To prevent a tire from moving in the direction of rotation axis when applying a sealant onto the inner surface of the tire and provide a sealant onto the tire inner surface with a good balance of weight.SOLUTION: The inventive device for producing a tire includes a holder 20 that supports a tire T rotatably around the tire rotation axis L, an applicator 50 that applies a sealant 6 onto the inner surface of the tire T supported by the holder 20 to form a sealing layer 5, and a stopper 26 for preventing the tire T supported by the holder 20 from moving in the direction of the tire rotation axis L.SELECTED DRAWING: Figure 1

Description

本発明は、タイヤ製造装置に関する。 The present invention relates to a tire manufacturing apparatus.

従来より、タイヤ内面にシーラント剤と呼ばれるパンク防止用の密封剤を塗布したタイヤの製造装置が知られている（例えば、下記特許文献１参照）。 Conventionally, there has been known a tire manufacturing apparatus in which a sealing agent for preventing a puncture, which is called a sealant, is applied to the inner surface of the tire (see, for example, Patent Document 1 below).

下記特許文献１に記載された製造装置では、供給装置から密封剤が可撓性を有する配管を介して吐出口へ供給し、密封剤がタイヤ幅方向の一部が重なるように、タイヤを回転させるとともに吐出口をタイヤ幅方向に移動させながら吐出口より帯状の密封剤を吐出する。これにより、上記製造装置では、タイヤ内面の所定領域が密封層により隙間無く覆われている。 In the manufacturing apparatus described in Patent Document 1 below, the sealing agent is supplied from the supply device to the discharge port through a flexible pipe, and the tire is rotated so that the sealing agent partially overlaps in the tire width direction. At the same time, the band-shaped sealing agent is discharged from the discharge port while moving the discharge port in the tire width direction. As a result, in the above-mentioned manufacturing apparatus, a predetermined area on the inner surface of the tire is covered with a sealing layer without a gap.

特開２０１４－２１７９５３号Japanese Unexamined Patent Publication No. 2014-217953

しかしながら、上記製造装置では、タイヤ内面に密封剤を塗布する際にタイヤを回転させると、タイヤが回転軸の方向へ位置がずれ、局所的に密封剤の重なり量が変化したり、密封剤か重なり合わなくなるおそれがある。重なり量の変化は重量バランスを悪化させるおそれがある。また、密封剤か重なり合わなくなると、密封層として機能しないおそれがある。 However, in the above manufacturing apparatus, when the tire is rotated when the sealing agent is applied to the inner surface of the tire, the position of the tire shifts in the direction of the rotation axis, and the overlapping amount of the sealing agent changes locally, or is it a sealing agent? There is a risk that they will not overlap. Changes in the amount of overlap may worsen the weight balance. Also, if the sealants do not overlap, they may not function as a sealing layer.

本発明はこのような実情に鑑みてなされたものであり、タイヤ内面に密封剤を塗布する際にタイヤが回転軸の方向へ移動するのを抑え、重量バランスよく密封剤をタイヤ内面に設けることができるタイヤ製造装置を提供することを目的とする。 The present invention has been made in view of such circumstances, and when the sealing agent is applied to the inner surface of the tire, the tire is prevented from moving in the direction of the rotation axis, and the sealing agent is provided on the inner surface of the tire in a well-balanced manner. It is an object of the present invention to provide a tire manufacturing apparatus capable of producing tires.

本発明の実施形態に係るタイヤ製造装置は、タイヤをタイヤ回転軸の周りに回転可能に支持する保持装置と、前記保持装置に支持されたタイヤの内面に密封剤を塗布して密封層を設ける塗布装置と、前記保持装置に支持されたタイヤが回転軸の方向へ移動するのを規制するストッパとを備えるものである。 In the tire manufacturing apparatus according to the embodiment of the present invention, a holding device that rotatably supports the tire around the tire rotation axis and a sealing layer are provided by applying a sealing agent to the inner surface of the tire supported by the holding device. It includes a coating device and a stopper that regulates the movement of the tire supported by the holding device in the direction of the rotation axis.

上記タイヤ製造装置では、タイヤ内面に密封剤を塗布する際にタイヤが回転軸の方向へ移動するのを抑えることができ、重量バランスよく密封剤をタイヤ内面に設けることができる。 In the tire manufacturing apparatus, it is possible to prevent the tire from moving in the direction of the rotation axis when the sealing agent is applied to the inner surface of the tire, and the sealing agent can be provided on the inner surface of the tire in a well-balanced weight manner.

本発明の一実施形態のタイヤ製造装置を概略で示す説明図Explanatory drawing which outlines the tire manufacturing apparatus of one Embodiment of this invention. （ａ）～（ｆ）は図１のタイヤ製造装置の動作を示す説明図(A) to (f) are explanatory views showing the operation of the tire manufacturing apparatus of FIG. 図１に示すタイヤ製造装置で製造されるタイヤの一例を示す断面図Cross-sectional view showing an example of a tire manufactured by the tire manufacturing apparatus shown in FIG. 本発明の変更例のタイヤ製造装置を概略で示す説明図Explanatory drawing which outlines the tire manufacturing apparatus of the modification of this invention.

図１は、一実施形態に係るタイヤ製造装置１０を示した図である。このタイヤ製造装置１０は、加硫成型された空気入りタイヤ（以下、タイヤということもある）Ｔの内面に密封剤を塗布して密封層を形成する装置である。 FIG. 1 is a diagram showing a tire manufacturing apparatus 10 according to an embodiment. The tire manufacturing apparatus 10 is an apparatus for forming a sealing layer by applying a sealing agent to the inner surface of a vulcanized and molded pneumatic tire (hereinafter, also referred to as a tire) T.

ここで、タイヤＴは、図３に示すように、接地面をなすトレッド１と、トレッド１の幅方向両端からタイヤ径方向内側に延びる一対のショルダ２、２、サイドウォール３，３及びビード４，４と、タイヤ内面のうちトレッド１及び一対のショルダ２、２の内側に位置する部分に設けられた密封層５とを備える。タイヤ内面に設けられた密封層５を除いて一般的な各種タイヤ構造を採用することができる。なお、本明細書では、密封層５が設けられていない加硫済みのタイヤについてもタイヤＴと表すことがある。 Here, as shown in FIG. 3, the tire T includes a tread 1 forming a contact patch, and a pair of shoulders 2, 2, sidewalls 3, 3 and beads 4 extending inward in the tire radial direction from both ends in the width direction of the tread 1. , 4 and a sealing layer 5 provided on the inner surface of the tire 1 and the pair of shoulders 2 and 2 located inside the tread 1 and the pair of shoulders 2 and 2. Various general tire structures can be adopted except for the sealing layer 5 provided on the inner surface of the tire. In the present specification, the vulcanized tire without the sealing layer 5 may also be referred to as a tire T.

密封層５は、タイヤ周方向に延びる細長い帯状に形成した密封剤６を、タイヤ幅方向の一部が重なるようにタイヤ幅方向に位置を変えながらタイヤ周方向に沿って貼り付けることにより形成されている。 The sealing layer 5 is formed by attaching a sealing agent 6 formed in an elongated strip shape extending in the tire circumferential direction along the tire circumferential direction while changing the position in the tire width direction so that a part of the sealing agent 6 in the tire width direction overlaps. ing.

密封層５は、高い粘着性を有する密封剤を細長い帯状に形成した複数の帯状の密封剤６から構成されており、釘踏み等によりタイヤＴのトレッド１を貫通する孔ができると、この孔を自動的に封止して空気の漏れ出しを防ぎ、タイヤＴのパンクを抑制する。つまり、タイヤＴはセルフシールタイプの空気入りタイヤとなっている。 The sealing layer 5 is composed of a plurality of strip-shaped sealing agents 6 in which a sealing agent having high adhesiveness is formed in an elongated strip shape, and when a hole penetrating the tread 1 of the tire T is formed by nailing or the like, this hole is formed. Is automatically sealed to prevent air leakage and suppress puncture of the tire T. That is, the tire T is a self-sealing type pneumatic tire.

密封層５を構成する密封剤６は、例えば、未加硫または半加硫状態のブチルゴムに、ポリイソブチレン、ポリブテン等の可塑剤と、熱可塑性オレフィン／ジオレフィン共重合体等の粘着性付与剤と、カーボンブラックやシリカ等の充填材を配合したものを使用することができる。なお、密封剤６は、これに制限されることなく、従来から使用されている他の公知の密封剤を用いることもできる。 The sealing agent 6 constituting the sealing layer 5 is, for example, an unvulcanized or semi-vulcanized butyl rubber, a plasticizing agent such as polyisobutylene or polybutene, and a tackifier such as a thermoplastic olefin / diolefin copolymer. And, a material containing a filler such as carbon black or silica can be used. The sealing agent 6 is not limited to this, and other known sealing agents conventionally used can also be used.

次に、タイヤＴの内面に密封層５を形成するタイヤ製造装置１０について、図１を参照して説明する。 Next, the tire manufacturing apparatus 10 that forms the sealing layer 5 on the inner surface of the tire T will be described with reference to FIG.

タイヤ製造装置１０は、タイヤＴをタイヤ回転軸Ｌの周りに回転可能に保持する保持装置２０と、保持装置２０に保持されたタイヤＴの内面に密封剤６を塗布して密封層５を形成する塗布装置５０とを備える。 The tire manufacturing apparatus 10 forms a sealing layer 5 by applying a sealing agent 6 to the holding device 20 that rotatably holds the tire T around the tire rotation axis L and the inner surface of the tire T held by the holding device 20. The coating device 50 is provided.

保持装置２０は、加硫成型されたタイヤＴを回転させながら保持するとともに、塗布装置５０に対するタイヤＴの位置及び角度を変更する。 The holding device 20 holds the vulcanized tire T while rotating it, and changes the position and angle of the tire T with respect to the coating device 50.

保持装置２０は、タイヤＴを径方向外側から挟持する挟持部２１と、挟持部２１を支持する回転プレート２２と、挟持部２１を移動させるとともに回転プレート２２を回転させる駆動部２３と、回転プレート２２及び駆動部２３を移動させる移動機構２４とを備える。 The holding device 20 includes a holding portion 21 that holds the tire T from the outside in the radial direction, a rotating plate 22 that supports the holding portion 21, a driving portion 23 that moves the holding portion 21 and rotates the rotating plate 22, and a rotating plate. A moving mechanism 24 for moving the 22 and the driving unit 23 is provided.

挟持部２１は、タイヤＴのトレッド１を挟持するトレッド挟持部２１ａと、サイドウォール３を挟持するサイド挟持部２１ｂとを備える略Ｌ字形状をなしている。挟持部２１は、回転プレート２２の回転軸Ｍを中心とする円周上に間隔をあけて複数（例えば、４つ）設けられている。挟持部２１は、スライダ２５を介して回転プレート２２に設けられている。スライダ２５は、回転プレート２２の回転軸Ｍを中心とする径方向に移動可能に挟持部２１を支持する。 The sandwiching portion 21 has a substantially L-shape including a tread sandwiching portion 21a for sandwiching the tread 1 of the tire T and a side sandwiching portion 21b for sandwiching the sidewall 3. A plurality (for example, four) of the sandwiching portions 21 are provided on the circumference of the rotating plate 22 about the rotation axis M at intervals. The sandwiching portion 21 is provided on the rotating plate 22 via the slider 25. The slider 25 supports the holding portion 21 so as to be movable in the radial direction about the rotation axis M of the rotation plate 22.

タイヤＴのタイヤ回転軸Ｌが回転プレートの法線方向と一致するようにタイヤＴのサイドウォール３をサイド挟持部２１ｂに載置すると、トレッド挟持部２１ａは、タイヤＴのトレッド１に径方向外側から当接してタイヤＴを回転プレート２２上において保持する。 When the sidewall 3 of the tire T is placed on the side holding portion 21b so that the tire rotation axis L of the tire T coincides with the normal direction of the rotating plate, the tread holding portion 21a is radially outside the tread 1 of the tire T. Holds the tire T on the rotating plate 22 in contact with the tire T.

また、本実施形態の挟持部２１は、タイヤＴのサイドウォール３と当接するストッパ２６と、ストッパ２６を回転プレート２２の法線方向へ移動させるエアーシリンダなどストッパ駆動部２７とを備える。ストッパ駆動部２７は、ストッパ２６を回転プレート２２の法線方向へ移動させ、タイヤＴをサイド挟持部２１ｂとストッパ２６との間で保持することで、タイヤ回転軸Ｌに平行な方向へのタイヤＴの移動を規制する。 Further, the holding portion 21 of the present embodiment includes a stopper 26 that comes into contact with the sidewall 3 of the tire T, and a stopper driving portion 27 such as an air cylinder that moves the stopper 26 in the normal direction of the rotating plate 22. The stopper drive unit 27 moves the stopper 26 in the normal direction of the rotating plate 22 and holds the tire T between the side holding portion 21b and the stopper 26, so that the tire is in the direction parallel to the tire rotation axis L. Regulate the movement of T.

駆動部２３は、回転プレート２２をその回転軸Ｍの周りに回転させるモータと、回転プレート２２の回転軸Ｍを中心とする径方向に回転プレート２２に設けられた複数の挟持部２１を同期して移動させるチャック機構とを備える。駆動部２３は、複数の挟持部２１が互いに径方向に広がった状態で、タイヤＴがサイド挟持部２１ｂに載置されると、挟持部２１を径方向内方へ移動させてトレッド挟持部２１ａでタイヤＴを挟持する。 The drive unit 23 synchronizes a motor that rotates the rotary plate 22 around the rotary shaft M with a plurality of holding portions 21 provided on the rotary plate 22 in the radial direction around the rotary shaft M of the rotary plate 22. It is equipped with a chuck mechanism to move it. When the tire T is placed on the side holding portion 21b in a state where the plurality of holding portions 21 are spread in the radial direction, the drive portion 23 moves the holding portion 21 inward in the radial direction to the tread holding portion 21a. Hold the tire T with.

移動機構２４は、例えば３軸の自由度を持つ産業用ロボットを用いることができる。この移動機構２４が有するアーム２４ａの先端部には、回転プレート２２及び駆動部２３が固定されている。これにより、移動機構２４は、回転プレート２２及び駆動部２３とともに挟持部２１に挟持されたタイヤＴの位置及び角度を変更する。 As the moving mechanism 24, for example, an industrial robot having three degrees of freedom can be used. A rotating plate 22 and a driving unit 23 are fixed to the tip of the arm 24a of the moving mechanism 24. As a result, the moving mechanism 24 changes the position and angle of the tire T sandwiched by the sandwiching portion 21 together with the rotating plate 22 and the driving portion 23.

塗布装置５０は、密封剤６を圧送する供給部５１と、供給部５１から圧送された密封剤６が供給されるノズル５２とを備える。供給部５１は、ギアポンプを備え、ギアポンプの動作中は一定量の密封剤６をノズル５２へ圧送し、ギアポンプの停止中はノズル５２へ密封剤６の供給を遮断する。ノズル５２の先端に設けられた吐出口５２ａは、タイヤＴの内面と対向するように配置され、供給部５１から供給された密封剤６をタイヤＴの内面へ吐出する。吐出口５２ａは、幅方向（タイヤ幅方向に平行な方向）の寸法が２～２０ｍｍ程度で、厚み方向の寸法が２～１０ｍｍ程度の略矩形状の開口形状をなしており、タイヤＴの幅寸法に比べて細幅の帯状に密封剤６を成型しながら吐出する。なお、吐出口５２ａの開口形状は、上記のような矩形状以外にも、丸形状や扁平な三角形状など任意の形状に設定することができる。 The coating device 50 includes a supply unit 51 for pressure-feeding the sealing agent 6, and a nozzle 52 to which the sealing agent 6 pressure-fed from the supply unit 51 is supplied. The supply unit 51 includes a gear pump, and presses a fixed amount of the sealing agent 6 to the nozzle 52 while the gear pump is operating, and shuts off the supply of the sealing agent 6 to the nozzle 52 when the gear pump is stopped. The discharge port 52a provided at the tip of the nozzle 52 is arranged so as to face the inner surface of the tire T, and discharges the sealing agent 6 supplied from the supply unit 51 to the inner surface of the tire T. The discharge port 52a has a substantially rectangular opening shape having a dimension in the width direction (direction parallel to the tire width direction) of about 2 to 20 mm and a dimension in the thickness direction of about 2 to 10 mm, and the width of the tire T. The sealing agent 6 is discharged while being molded into a strip having a width narrower than the size. The opening shape of the discharge port 52a can be set to any shape such as a round shape or a flat triangular shape in addition to the rectangular shape as described above.

上記した保持装置２０及び塗布装置５０は、それぞれ不図示の制御装置に接続され、その作動が制御装置により制御されるようになっている。 The holding device 20 and the coating device 50 described above are each connected to a control device (not shown), and the operation thereof is controlled by the control device.

次に、タイヤ製造装置１０の動作について、図２を参照して説明する。 Next, the operation of the tire manufacturing apparatus 10 will be described with reference to FIG.

まず、挟持部２１を設けた面が上方を向くように、移動機構２４が回転プレート２２を配置する。また、タイヤＴをサイド挟持部２１ｂに載置する際にストッパ２６がタイヤＴと接触しないように、駆動部２３が挟持部２１を径方向外方へ移動させる。その後、図２（ａ）に示すように、加硫工程において加硫成型されたタイヤＴを、サイド挟持部２１ｂにサイドウォール３が当接するように挟持部２１に載置する。 First, the moving mechanism 24 arranges the rotating plate 22 so that the surface provided with the holding portion 21 faces upward. Further, when the tire T is placed on the side holding portion 21b, the driving portion 23 moves the holding portion 21 outward in the radial direction so that the stopper 26 does not come into contact with the tire T. After that, as shown in FIG. 2A, the tire T vulcanized and molded in the vulcanization step is placed on the holding portion 21 so that the sidewall 3 abuts on the side holding portion 21b.

次いで、図２（ｂ）に示すように、駆動部２３が挟持部２１を径方向内方へ移動させてトレッド挟持部２１ａでタイヤＴを挟持する。その際、複数の挟持部２１が、回転プレート２２の回転軸Ｍを中心とする径方向へ同期して移動するため、トレッド挟持部２１ａがタイヤＴを保持すると、タイヤ回転軸Ｌが回転プレート２２の回転軸Ｍに一致する。また、ストッパ駆動部２７が、ストッパ２６とサイド挟持部２１ｂとの間でタイヤＴを保持するようにストッパ２６を移動させ、タイヤ回転軸Ｌに平行な方向へのタイヤＴの移動を規制する。 Next, as shown in FIG. 2B, the drive unit 23 moves the sandwiching portion 21 inward in the radial direction and sandwiches the tire T by the tread sandwiching portion 21a. At that time, since the plurality of holding portions 21 move synchronously in the radial direction about the rotation axis M of the rotating plate 22, when the tread holding portion 21a holds the tire T, the tire rotating shaft L changes to the rotating plate 22. Corresponds to the rotation axis M of. Further, the stopper drive portion 27 moves the stopper 26 so as to hold the tire T between the stopper 26 and the side holding portion 21b, and restricts the movement of the tire T in the direction parallel to the tire rotation axis L.

次いで、図２（ｃ）に示すように、移動機構２４が回転プレート２２及び駆動部２３とともにタイヤＴを移動させ、タイヤＴのビード４の内側からタイヤ内側へノズル５２を挿入する。 Next, as shown in FIG. 2C, the moving mechanism 24 moves the tire T together with the rotating plate 22 and the driving unit 23, and inserts the nozzle 52 from the inside of the bead 4 of the tire T to the inside of the tire.

次いで、図２（ｄ）に示すように、移動機構２４が回転プレート２２及び駆動部２３とともにタイヤＴを移動させ、ノズル５２の吐出口５２ａを一方のショルダ２の内側の所定位置と対向させる。 Next, as shown in FIG. 2D, the moving mechanism 24 moves the tire T together with the rotating plate 22 and the driving unit 23 so that the discharge port 52a of the nozzle 52 faces a predetermined position inside the one shoulder 2.

その後、駆動部２３が、回転プレート２２を回転させてタイヤＴをタイヤ回転軸Ｌの周りに回転させるとともに、塗布装置５０が動作して一定量の密封剤６をノズル５２へ圧送する。これにより、吐出口５２ａの開口形状に対応した帯状の密封剤６が吐出口５２ａからタイヤ内面へ向けて吐出され、タイヤ内面に対して密封剤６の塗布を開始する。 After that, the drive unit 23 rotates the rotary plate 22 to rotate the tire T around the tire rotation shaft L, and the coating device 50 operates to pump a fixed amount of the sealing agent 6 to the nozzle 52. As a result, the band-shaped sealing agent 6 corresponding to the opening shape of the discharge port 52a is discharged from the discharge port 52a toward the inner surface of the tire, and the application of the sealing agent 6 to the inner surface of the tire is started.

そして、図２（ｄ）～（ｆ）に示すように、駆動部２３による回転プレート２２の回転と、塗布装置５０による密封剤６の吐出とを継続した状態で、吐出口５２ａがタイヤＴの内面の子午線方向の曲面形状に沿ってタイヤ幅方向一方側から他方側へ相対的に移動するように、移動機構２４がタイヤＴをタイヤ幅方向へ移動させながら、タイヤ回転軸Ｌの方向を変更する。つまり、移動機構２４は、吐出口５２ａから密封剤６を吐出する方向が、密封剤６を塗布する位置におけるタイヤ内面の法線方向と一致するように、タイヤＴの位置とタイヤ回転軸Ｌの方向を調整する。 Then, as shown in FIGS. 2 (d) to 2 (f), the discharge port 52a of the tire T is in a state where the rotation of the rotating plate 22 by the drive unit 23 and the discharge of the sealing agent 6 by the coating device 50 are continued. The moving mechanism 24 changes the direction of the tire rotation axis L while moving the tire T in the tire width direction so as to move relatively from one side to the other side in the tire width direction along the curved shape of the inner surface in the meridional direction. do. That is, the moving mechanism 24 has the position of the tire T and the tire rotation axis L so that the direction in which the sealing agent 6 is discharged from the discharge port 52a coincides with the normal direction of the inner surface of the tire at the position where the sealing agent 6 is applied. Adjust the direction.

本実施形態では、図２（ｄ）に示す密封剤６の塗布開始時に、タイヤＴのノズル５２を挿入する側が斜め上方を向くようにタイヤ回転軸Ｌを斜め上方に傾斜させる。そして、図２（ｅ）、（ｆ）に示すようにタイヤＴをタイヤ幅方向一方側から他方側へ移動させて密封剤６をタイヤＴの内面に塗布するに従って、タイヤＴのノズル５２を挿入する側が斜め下方を向くようにタイヤ回転軸Ｌを徐々に斜め下方に傾斜させる。これにより、タイヤＴの内面には、帯状の密封剤６が螺旋状に塗布され密封層５が形成される。 In the present embodiment, at the start of application of the sealing agent 6 shown in FIG. 2D, the tire rotation shaft L is tilted diagonally upward so that the side into which the nozzle 52 of the tire T is inserted faces diagonally upward. Then, as shown in FIGS. 2 (e) and 2 (f), the tire T is moved from one side to the other in the tire width direction, and the sealing agent 6 is applied to the inner surface of the tire T, so that the nozzle 52 of the tire T is inserted. The tire rotation axis L is gradually tilted diagonally downward so that the side to be tired faces diagonally downward. As a result, the band-shaped sealing agent 6 is spirally applied to the inner surface of the tire T to form the sealing layer 5.

そして、図２（ｆ）に示すように、ノズル５２の吐出口５２ａが、他方のショルダ２の内側に到達すると、駆動部２３による回転プレート２２の回転を停止し、また、供給部５１のギアポンプを停止して塗布装置５０による密封剤６の吐出を停止する。 Then, as shown in FIG. 2F, when the discharge port 52a of the nozzle 52 reaches the inside of the other shoulder 2, the rotation of the rotary plate 22 by the drive unit 23 is stopped, and the gear pump of the supply unit 51 is stopped. To stop the discharge of the sealing agent 6 by the coating device 50.

そして、移動機構２４が回転プレート２２及び駆動部２３とともにタイヤＴを移動させ、ビード４の内側からノズル５２を抜き取った後、図２（ｂ）に示すように、タイヤ回転軸Ｌが上方を向くように回転プレート２２を配置する。 Then, the moving mechanism 24 moves the tire T together with the rotating plate 22 and the driving unit 23, and after the nozzle 52 is pulled out from the inside of the bead 4, the tire rotating shaft L faces upward as shown in FIG. 2 (b). The rotating plate 22 is arranged so as to be so.

そして、トレッド挟持部２１ａによるタイヤＴの挟持と、ストッパ２６及びサイド挟持部２１ｂによるタイヤＴの挟持とを解除した後、密封層５が形成されたタイヤＴを取り出す。 Then, after releasing the pinching of the tire T by the tread pinching portion 21a and the pinching of the tire T by the stopper 26 and the side pinching portion 21b, the tire T on which the sealing layer 5 is formed is taken out.

本実施形態では、密封剤６の塗布中にタイヤＴがサイド挟持部２１ｂとストッパ２６との間で保持されタイヤ回転軸Ｌに平行な方向へ移動することがないため、タイヤＴの所望位置に密封剤６を塗布することができる。 In the present embodiment, the tire T is held between the side holding portion 21b and the stopper 26 and does not move in the direction parallel to the tire rotation axis L during the application of the sealing agent 6, so that the tire T is placed at a desired position. The sealant 6 can be applied.

特に、本実施形態では、タイヤ径方向及びタイヤ回転軸の方向にずれることがないように挟持部２１及びストッパ２６によってタイヤＴを回転プレート２２に固定した状態で、回転プレート２２とともにタイヤＴを回転させるため、タイヤＴの外表面を損傷することなくタイヤＴの所望位置に密封剤６を塗布することができる。 In particular, in the present embodiment, the tire T is rotated together with the rotating plate 22 in a state where the tire T is fixed to the rotating plate 22 by the holding portion 21 and the stopper 26 so as not to deviate in the tire radial direction and the tire rotating axis direction. Therefore, the sealing agent 6 can be applied to a desired position of the tire T without damaging the outer surface of the tire T.

また、本実施形態のタイヤ製造装置１０では、タイヤＴの内面に密封剤６を塗布する際に、移動機構２４がタイヤＴを移動させてタイヤ回転軸Ｌの方向を変更させるため、ノズル５２をタイヤ径方向に対して傾斜させる必要が無く、ノズル５２内の密封剤の流路が圧迫を受けて狭くなることがない。そのため、密封剤６が高粘度の物性を有している場合であっても、ノズル５２内において密封剤６が詰まりにくく、密封層５の形成不良を抑えることができる。 Further, in the tire manufacturing apparatus 10 of the present embodiment, when the sealing agent 6 is applied to the inner surface of the tire T, the moving mechanism 24 moves the tire T to change the direction of the tire rotation axis L, so that the nozzle 52 is used. It is not necessary to incline the tire in the radial direction, and the flow path of the sealing agent in the nozzle 52 is not narrowed due to pressure. Therefore, even when the sealing agent 6 has high-viscosity physical properties, the sealing agent 6 is less likely to be clogged in the nozzle 52, and poor formation of the sealing layer 5 can be suppressed.

しかも、本実施形態では、ノズル５２が供給部５１に固定され、タイヤＴの内面に密封剤６を塗布する間、ノズル５２が停止しておりノズル５２の位置が変化しないため、より確実にノズル５２内における密封剤６の詰まりを抑え、密封層５の形成不良を抑えることができる。 Moreover, in the present embodiment, the nozzle 52 is fixed to the supply unit 51, and while the sealing agent 6 is applied to the inner surface of the tire T, the nozzle 52 is stopped and the position of the nozzle 52 does not change, so that the nozzle is more reliable. It is possible to suppress clogging of the sealing agent 6 in 52 and suppress poor formation of the sealing layer 5.

（変更例）
上記の実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。この新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。 (Change example)
The above embodiments are presented as examples and are not intended to limit the scope of the invention. This novel embodiment can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention.

例えば、上記した実施形態では、３軸の自由度を持つ産業用ロボットのアーム２４ａの先端部に回転プレート２２及び駆動部２３を取り付け、密封剤６の塗布中にタイヤＴを水平方向及び上下方向へ移動させつつタイヤＴのタイヤ回転軸方向を変更したが、ノズル５２の吐出口５２ａを移動させてタイヤ内面に密封剤６を塗布してもよい。 For example, in the above embodiment, the rotating plate 22 and the driving unit 23 are attached to the tip of the arm 24a of the industrial robot having three axes of freedom, and the tire T is placed in the horizontal direction and the vertical direction while the sealing agent 6 is applied. Although the tire rotation axis direction of the tire T is changed while moving to, the sealing agent 6 may be applied to the inner surface of the tire by moving the discharge port 52a of the nozzle 52.

具体的には、図４に示すように、回転プレート２２及び駆動部２３を接地面に固定するとともに、３軸の自由度を持つ産業用ロボット６０のアーム６０ａの先端にノズル５２の吐出口５２ａを設け、吐出口５２ａを水平方向及び上下方向へ移動させつつ、吐出口５２ａが密封剤を吐出する方向を変更することで、タイヤ内面に密封剤６を塗布してもよい。このような場合であっても、タイヤＴの回転中にタイヤＴがタイヤ回転軸方向にずれることがなく、上記の実施形態と同様の作用効果が奏される。 Specifically, as shown in FIG. 4, the rotary plate 22 and the drive unit 23 are fixed to the ground plane, and the discharge port 52a of the nozzle 52 is attached to the tip of the arm 60a of the industrial robot 60 having three degrees of freedom. The sealing agent 6 may be applied to the inner surface of the tire by changing the direction in which the sealing agent is discharged by the discharge port 52a while moving the discharge port 52a in the horizontal direction and the vertical direction. Even in such a case, the tire T does not shift in the direction of the tire rotation axis during the rotation of the tire T, and the same effects as those in the above embodiment can be obtained.

また、上記した実施形態では、帯状の密封剤６を螺旋状に塗布することでタイヤＴの内面に密封層５を形成したが、例えば、帯状の密封剤６をタイヤ周方向に平行に塗布し、タイヤを１回転させる毎にタイヤ幅方向における密封剤６の貼り付け位置を、密封剤６の幅寸法より小さい寸法だけタイヤ幅方向へずらすことで、タイヤＴの内面に密封層５を形成してもよい。 Further, in the above-described embodiment, the band-shaped sealing agent 6 is spirally applied to form the sealing layer 5 on the inner surface of the tire T. For example, the band-shaped sealing agent 6 is applied parallel to the tire circumferential direction. The sealing layer 5 is formed on the inner surface of the tire T by shifting the sticking position of the sealing agent 6 in the tire width direction in the tire width direction by a dimension smaller than the width dimension of the sealing agent 6 each time the tire is rotated. You may.

１…トレッド、２…ショルダ、３…サイドウォール、４…ビード、５…密封層、６…密封剤、１０…タイヤ製造装置、２０…保持装置、２１…挟持部、２１ａ…トレッド挟持部、２１ｂ…サイド挟持部、２２…回転プレート、２３…駆動部、２４…移動機構、２５…スライダ、２６…ストッパ、２７…ストッパ挟持部、５０…塗布装置、５１…供給部、５２…ノズル、５２ａ…吐出口 1 ... tread, 2 ... shoulder, 3 ... sidewall, 4 ... bead, 5 ... sealing layer, 6 ... sealing agent, 10 ... tire manufacturing equipment, 20 ... holding device, 21 ... pinching part, 21a ... tread holding part, 21b ... side holding part, 22 ... rotating plate, 23 ... driving part, 24 ... moving mechanism, 25 ... slider, 26 ... stopper, 27 ... stopper holding part, 50 ... coating device, 51 ... supply part, 52 ... nozzle, 52a ... Discharge port

Claims (1)

タイヤをタイヤ回転軸の周りに回転可能に支持する保持装置と、前記保持装置に支持されたタイヤの内面に密封剤を塗布して密封層を設ける塗布装置と、前記保持装置に支持されたタイヤがタイヤ回転軸の方向へ移動するのを規制するストッパとを備えるタイヤ製造装置。 A holding device that rotatably supports the tire around the tire rotation axis, a coating device that applies a sealing agent to the inner surface of the tire supported by the holding device to provide a sealing layer, and a tire supported by the holding device. A tire manufacturing device equipped with a stopper that regulates the movement of the tire in the direction of the tire rotation axis.
JP2020187548A 2020-11-10 2020-11-10 Device for producing tire Pending JP2022076897A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4335632A1 (en) * 2022-09-12 2024-03-13 Toyo Tire Corporation Pneumatic tire manufacturing method and pneumatic tire manufacturing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4335632A1 (en) * 2022-09-12 2024-03-13 Toyo Tire Corporation Pneumatic tire manufacturing method and pneumatic tire manufacturing apparatus

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