JP7473430B2 - Tire curing mold - Google Patents

Tire curing mold Download PDF

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JP7473430B2
JP7473430B2 JP2020153698A JP2020153698A JP7473430B2 JP 7473430 B2 JP7473430 B2 JP 7473430B2 JP 2020153698 A JP2020153698 A JP 2020153698A JP 2020153698 A JP2020153698 A JP 2020153698A JP 7473430 B2 JP7473430 B2 JP 7473430B2
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longitudinal
tire
mounting groove
pair
short
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JP2022047750A (en
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将明 小原
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Toyo Tire Corp
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Toyo Tire Corp
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Description

本開示は、タイヤ加硫金型に関する。 This disclosure relates to a tire vulcanization mold.

従来より、タイヤ成型面の装着溝にステンシルプレート（「セリアルプレート」ともいう）を固定したタイヤ加硫金型を使用してタイヤを加硫成型し、タイヤの外表面に凹凸状の標識を形成する方法が知られている。ここで、ステンシルプレートを装着溝に固定する方法として、ねじを使用する方法が知られている（特許文献１参照）。 Conventionally, a method has been known in which a tire is vulcanized and molded using a tire vulcanization mold in which a stencil plate (also called a "serial plate") is fixed in a mounting groove on the tire molding surface, and a concave-convex marking is formed on the outer surface of the tire. Here, a method using screws is known as a method for fixing the stencil plate in the mounting groove (see Patent Document 1).

ステンシルプレートは、その両端がねじによって装着溝に固定されるが、ステンシルプレートと装着溝との間に隙間があると、その隙間からゴムが流れ込み、加硫成型後のタイヤにピンチやバリが形成される。バリは、タイヤ表面に余分な被膜が形成されたものであり、標識の識別性を低下させる原因となる。ピンチは、タイヤの表面に生じる意図しない段差であり、タイヤの外観不良の原因となる。 The stencil plate is fixed into the mounting groove by screws at both ends, but if there is a gap between the stencil plate and the mounting groove, rubber will flow into the gap and pinches and burrs will form on the tire after vulcanization. Burrs are excess coating formed on the tire surface, which reduces the visibility of the markings. Pinches are unintentional steps that appear on the tire surface, which cause the tire to look bad.

特開２０１４－１７２３６０号公報JP 2014-172360 A

本開示の目的は、加硫成型後のタイヤにおける標識の識別性を確保し、外観不良を抑制できるタイヤ加硫金型を提供することである。 The objective of this disclosure is to provide a tire curing mold that ensures the identifiability of marks on tires after curing and molding, and can reduce poor appearance.

本開示のタイヤ加硫金型は、タイヤの外表面に標識又は模様を転写形成するための薄板と、
前記薄板が装着される装着溝と、
前記薄板と前記装着溝の底面との間に配置される嵩上げ部材と、
前記薄板と前記嵩上げ部材を前記装着溝へ固定するための締結部材と、を備え、
前記薄板は、前記装着溝の底面へ向かって突出する凸状膨出部を有し、
前記嵩上げ部材は、前記薄板の縁に沿って配置され、前記凸状膨出部を取り巻く中空領域を有するものである。 The tire vulcanization mold of the present disclosure includes a thin plate for transferring and forming a mark or pattern on the outer surface of a tire,
a mounting groove in which the thin plate is mounted;
a raising member disposed between the thin plate and a bottom surface of the mounting groove;
a fastening member for fixing the thin plate and the raising member to the mounting groove,
the thin plate has a convex bulge that protrudes toward a bottom surface of the mounting groove,
The raising member is disposed along the edge of the thin plate and has a hollow area surrounding the protruding portion.

タイヤ子午線断面に沿ったタイヤ加硫金型の断面図Cross-sectional view of a tire curing mold along the tire meridian cross section 図１のＸ矢視平面図FIG. 2 is a plan view taken along the arrow X in FIG. 図２における線Ｃ１上での断面図3 is a cross-sectional view taken along line C1 in FIG. 2. 図２の薄板が装着溝に装着される前の状態を模式的に示す断面図FIG. 3 is a cross-sectional view showing a schematic state before the thin plate of FIG. 2 is mounted in the mounting groove; 嵩上げ部材の一例を示す平面図FIG. 1 is a plan view showing an example of a raising member; 図５（ａ）に示す嵩上げ部材のVI領域拡大図FIG. 5(a) is an enlarged view of region VI of the raised portion.

以下、タイヤ加硫金型における一実施形態について、図１～図６を参照しながら説明する。なお、各図において、図面の寸法比と実際の寸法比とは、必ずしも一致しておらず、また、各図面の間での寸法比も、必ずしも一致していない。 One embodiment of a tire curing mold will be described below with reference to Figures 1 to 6. Note that in each figure, the dimensional ratios in the drawing do not necessarily match the actual dimensional ratios, and the dimensional ratios between the drawings do not necessarily match either.

図１を参照しながら、タイヤの加硫成型に用いられるタイヤ加硫金型について説明する。図１は、タイヤ子午線断面に沿ったタイヤ加硫金型１０（以降、金型１０という）の断面を示す。この金型１０は型閉め状態にある。タイヤＴは、タイヤ幅方向を上下に向けてセットされる。図１において、左方向はタイヤ径方向外側、右方向はタイヤ径方向内側である。 With reference to Figure 1, a tire vulcanization mold used for vulcanizing and molding tires will be described. Figure 1 shows a cross section of a tire vulcanization mold 10 (hereinafter referred to as mold 10) along the tire meridian cross section. This mold 10 is in a closed state. A tire T is set with its width direction facing up and down. In Figure 1, the left direction is the outer side in the tire radial direction, and the right direction is the inner side in the tire radial direction.

金型１０は、タイヤＴのトレッドを成型するトレッド型部１１と、タイヤＴのサイドウォールを成型する一対のサイド型部１２，１３と、タイヤＴのビードが嵌合される一対のビードリング１４，１５とを備える。金型１０は、キャビティ１６にセットされたタイヤＴの外表面に接するタイヤ成型面１を備える。タイヤ成型面１は、トレッド型部１１の内面、サイド型部１２，１３の内面、及び、ビードリング１４，１５の内面を含む。図示を省略しているが、トレッド型部１１の内面には、タイヤＴのトレッドにトレッドパターンを形成するための凹凸部が設けられている。 The mold 10 includes a tread mold portion 11 for molding the tread of the tire T, a pair of side mold portions 12, 13 for molding the sidewalls of the tire T, and a pair of bead rings 14, 15 into which the beads of the tire T are fitted. The mold 10 includes a tire molding surface 1 that contacts the outer surface of the tire T set in the cavity 16. The tire molding surface 1 includes the inner surface of the tread mold portion 11, the inner surfaces of the side mold portions 12, 13, and the inner surfaces of the bead rings 14, 15. Although not shown in the figure, the inner surface of the tread mold portion 11 is provided with uneven portions for forming a tread pattern in the tread of the tire T.

トレッド型部１１の内面の材料としては、アルミニウム材が例示される。このアルミニウム材は、純アルミ系の材料のみならずアルミニウム合金を含む概念であり、例えばＡｌ－Ｃｕ系、Ａｌ－Ｍｇ系、Ａｌ－Ｍｇ－Ｓｉ系、Ａｌ－Ｚｎ－Ｍｇ系、Ａｌ－Ｍｎ系、Ａｌ－Ｓｉ系が挙げられる。サイド型部１２，１３の内面及びビードリング１４，１５の内面の材料としては、一般構造用圧延鋼材（例えばＳＳ４００）などの鋼材が例示される。 An example of the material for the inner surface of the tread mold portion 11 is an aluminum material. This aluminum material is a concept that includes not only pure aluminum-based materials but also aluminum alloys, such as Al-Cu-based, Al-Mg-based, Al-Mg-Si-based, Al-Zn-Mg-based, Al-Mn-based, and Al-Si-based materials. An example of the material for the inner surface of the side mold portions 12, 13 and the inner surface of the bead rings 14, 15 is a steel material such as a general structural rolled steel material (e.g., SS400).

金型１０は、キャビティ１６にセットされたタイヤＴの外表面に接するタイヤ成型面１と、タイヤ成型面１に設けられた装着溝２と、タイヤＴの外表面に凹凸を形成する凹凸形成部を有し、装着溝２に装着される薄板３（「ステンシルプレート」ともいう）とを備える。装着溝２は、タイヤ成型面１の一部を局所的に窪ませることにより設けられている。本実施形態において、装着溝２は、タイヤ成型面１であるサイド型部１２の内面に設けられている。 The mold 10 includes a tire molding surface 1 that contacts the outer surface of the tire T set in the cavity 16, an attachment groove 2 provided in the tire molding surface 1, and a thin plate 3 (also called a "stencil plate") that has an unevenness forming portion that forms unevenness on the outer surface of the tire T and is attached to the attachment groove 2. The attachment groove 2 is provided by locally recessing a portion of the tire molding surface 1. In this embodiment, the attachment groove 2 is provided on the inner surface of the side mold portion 12, which is the tire molding surface 1.

図２は、図１のＸ矢視平面図であり、図１の下側に位置するサイド型部１２の内面における、装着溝２に嵌め込まれた薄板３が示されている。図２では、左右方向がタイヤ周方向に相当し、上方向がタイヤ径方向外側、下方向がタイヤ径方向内側である。 Figure 2 is a plan view taken along the X-arrow in Figure 1, showing a thin plate 3 fitted into a mounting groove 2 on the inner surface of the side mold portion 12 located at the bottom of Figure 1. In Figure 2, the left-right direction corresponds to the tire circumferential direction, the upper direction corresponds to the outer side in the tire radial direction, and the lower direction corresponds to the inner side in the tire radial direction.

装着溝２及び薄板３は、タイヤ周方向の長さがタイヤ径方向の長さよりも長い長手形状を有する。本実施形態において、装着溝２及び薄板３の長手方向ＬＤはタイヤ周方向に沿う方向であり、短手方向ＷＤはタイヤ径方向に沿う方向である。本実施形態において、装着溝２及び薄板３は、タイヤ周方向に沿って円弧状に湾曲した形状であるが、これに限られず、長手方向ＬＤが直線的に延びた形状でもよい。 The mounting groove 2 and the thin plate 3 have a longitudinal shape in which the length in the tire circumferential direction is longer than the length in the tire radial direction. In this embodiment, the longitudinal direction LD of the mounting groove 2 and the thin plate 3 is a direction along the tire circumferential direction, and the lateral direction WD is a direction along the tire radial direction. In this embodiment, the mounting groove 2 and the thin plate 3 are curved in an arc shape along the tire circumferential direction, but are not limited to this, and may be a shape in which the longitudinal direction LD extends linearly.

図３は、図２における線Ｃ１上の断面図を示している。図４は、図２における線Ｃ１上の断面において、薄板３を装着溝２に装着する前の状態を示している。なお、線Ｃ１は、装着溝２又は薄板３の短手方向ＷＤにおける中心を通る線である。図３及び図４において、左右方向が装着溝２及び薄板３の長手方向ＬＤに相当する。 Figure 3 shows a cross-sectional view taken along line C1 in Figure 2. Figure 4 shows the cross-sectional view taken along line C1 in Figure 2 before the thin plate 3 is attached to the attachment groove 2. Line C1 is a line passing through the center of the attachment groove 2 or the thin plate 3 in the short-side direction WD. In Figures 3 and 4, the left-right direction corresponds to the long-side direction LD of the attachment groove 2 and the thin plate 3.

装着溝２は、長手方向ＬＤに延びる一対の第１長手方向側壁２１及び第２長手方向側壁２２を有する。第１長手方向側壁２１及び第２長手方向側壁２２は、何れもタイヤ径方向外側に凸となる円弧状を呈する。第１長手方向側壁２１及び第２長手方向側壁２２は、平面視で何れも長手方向ＬＤに沿って湾曲した形状である。また、装着溝２は、一対の第１長手方向側壁２１及び第２長手方向側壁２２の端部同士を接続する一対の第１短手方向側壁２３及び第２短手方向側壁２４を有する。第１短手方向側壁２３及び第２短手方向側壁２４は、平面視で半円弧状を呈する。また、装着溝２は、平坦な底面２０を有する。 The mounting groove 2 has a pair of first longitudinal sidewalls 21 and second longitudinal sidewalls 22 extending in the longitudinal direction LD. The first longitudinal sidewalls 21 and second longitudinal sidewalls 22 are both arc-shaped and convex toward the tire radial outside. The first longitudinal sidewalls 21 and second longitudinal sidewalls 22 are both curved along the longitudinal direction LD in plan view. The mounting groove 2 also has a pair of first short-side sidewalls 23 and second short-side sidewalls 24 that connect the ends of the pair of first longitudinal sidewalls 21 and second longitudinal sidewalls 22. The first short-side sidewalls 23 and second short-side sidewalls 24 are semicircular in plan view. The mounting groove 2 also has a flat bottom surface 20.

装着溝２の短手方向ＷＤの幅Ｗ２は、長手方向ＬＤに一定である。本開示において、「一定」とは、厳密な意味での一定に限るものではなく、厳密に一定である場合だけでなく、±５％以下の変動がある場合も含む（以下も同様）。 The width W2 of the mounting groove 2 in the short direction WD is constant in the long direction LD. In this disclosure, "constant" is not limited to being constant in the strict sense, and includes not only cases where it is strictly constant, but also cases where it varies by ±5% or less (the same applies below).

薄板３は、タイヤの外表面に凹凸を形成可能な領域である凹凸形成部５を有する。タイヤの外表面に形成される凹凸は、例えば、タイヤサイズやロードインデックス、メーカー名、製造年週などを表示した文字や記号等からなる標識、又は、模様やデザインを示す。未加硫のタイヤが、金型１０におけるタイヤ成型面１の装着溝２に装着された薄板３に押し当てられ、凹凸形成部５の凹凸が加硫成型後のタイヤ表面に転写される。図２では、「ＴＴ」という文字列からなる標識が凹部３４で形成される例を示す。凹部３４の詳細は後で説明する。 The thin plate 3 has an unevenness forming portion 5, which is an area where unevenness can be formed on the outer surface of the tire. The unevenness formed on the outer surface of the tire indicates, for example, a mark consisting of letters or symbols indicating the tire size, load index, manufacturer name, manufacturing year and week, or a pattern or design. An unvulcanized tire is pressed against the thin plate 3 attached to the attachment groove 2 of the tire molding surface 1 of the mold 10, and the unevenness of the unevenness forming portion 5 is transferred to the tire surface after vulcanization molding. Figure 2 shows an example in which a mark consisting of the character string "TT" is formed in the recess 34. The recess 34 will be described in detail later.

薄板３は、装着溝２にねじ４（締結部材に相当する）を介して着脱自在に装着される。薄板３が製造年週を表す標識である場合などには、定期的に薄板３が取り換えられる。 The thin plate 3 is detachably attached to the mounting groove 2 via a screw 4 (corresponding to a fastening member). If the thin plate 3 is a mark indicating the year and week of manufacture, for example, the thin plate 3 is replaced periodically.

本開示において、ねじ４とは、螺旋状の溝が設けられた棒と当該棒の一端に設けられた頭部とを有する締結要素全般を指し、ボルトやビスを含むものである。本実施形態では、ねじ４の頂面４１ｂには、プラスドライバの先端を挿入するための十字の窪みを有するが、これに限られない。例えば、ねじ４の頂面４１ｂに、マイナスドライバの先端を挿入するためのすり割り状の窪みや、六角レンチの先端を挿入するための六角形状の窪みを有していても、構わない。また、係る窪みを有していなくてもよく、例えば、ねじ頭部側から見たときのねじ頭部を六角形状に形成し、該六角形状のねじ頭部を回すようにしてもよい。 In this disclosure, the screw 4 refers to a general fastening element having a rod with a spiral groove and a head provided at one end of the rod, including bolts and screws. In this embodiment, the top surface 41b of the screw 4 has a cross-shaped recess for inserting the tip of a Phillips head screwdriver, but is not limited to this. For example, the top surface 41b of the screw 4 may have a slot-shaped recess for inserting the tip of a flat head screwdriver, or a hexagonal recess for inserting the tip of a hexagonal wrench. Also, such a recess may not be present, and for example, the screw head may be formed in a hexagonal shape when viewed from the screw head side, and the hexagonal screw head may be turned.

本実施形態のねじ４は、平頭ねじである。図３及び図４に示すように、平頭ねじは、頭部４１の底面４１ａがねじ軸方向に対して垂直の平坦面をなす。ねじ４の頭部４１の厚みは、０．５～１．５ｍｍが好ましい。締結時において、頭部４１の底面４１ａは、タイヤ成型面１よりも装着溝２の底面２０に近い側に位置する。また、ねじ４の頭部４１は、タイヤ成型面１よりもキャビティ１６側へ突出し、頭部４１の頂面４１ｂは、タイヤ成型面１よりもキャビティ１６側に位置する。頭部４１のタイヤ成型面１からの突出量Ｔ４１（図３参照）は、１ｍｍ以下が好ましい。突出量Ｔ４１が大きくなると、加硫成型時にサイドウォールの表層ゴムが局所的に薄くなり、オゾンに起因するクラック発生などタイヤ耐久性に影響を及ぼすおそれがある。 The screw 4 in this embodiment is a flat head screw. As shown in Figs. 3 and 4, the bottom surface 41a of the head 41 of the flat head screw forms a flat surface perpendicular to the screw axis direction. The thickness of the head 41 of the screw 4 is preferably 0.5 to 1.5 mm. When fastened, the bottom surface 41a of the head 41 is located closer to the bottom surface 20 of the mounting groove 2 than the tire molding surface 1. The head 41 of the screw 4 also protrudes toward the cavity 16 side than the tire molding surface 1, and the top surface 41b of the head 41 is located closer to the cavity 16 side than the tire molding surface 1. The protrusion amount T41 of the head 41 from the tire molding surface 1 (see Fig. 3) is preferably 1 mm or less. If the protrusion amount T41 is large, the surface rubber of the sidewall becomes locally thin during vulcanization molding, which may affect tire durability, such as the occurrence of cracks due to ozone.

ねじ４の頂面４１ｂに設けられた窪みによって形成されるゴム***部の高さは、薄板３の凹部３４によって形成される標識の高さ以下が好ましい。これにより、形成される標識の視認性を向上できる。 The height of the rubber protuberance formed by the recess on the top surface 41b of the screw 4 is preferably equal to or less than the height of the mark formed by the recess 34 of the thin plate 3. This improves the visibility of the mark formed.

また、ねじ４の頭部４１の直径は、薄板３の短手方向ＷＤの幅Ｗ３の５０～１００％であるのが好ましい。頭部４１の直径が小さいと薄板３を保持する力が弱くなり、頭部４１の直径が大きいと、装着溝２内に頭部４１が収まらず、薄板３とねじ４の接触性悪化により薄板３を保持する力が損なわれる。 The diameter of the head 41 of the screw 4 is preferably 50 to 100% of the width W3 in the short direction WD of the thin plate 3. If the diameter of the head 41 is small, the force holding the thin plate 3 will be weak, and if the diameter of the head 41 is large, the head 41 will not fit inside the mounting groove 2, and the contact between the thin plate 3 and the screw 4 will deteriorate, resulting in a loss of force holding the thin plate 3.

薄板３の長手方向ＬＤの長さＬ３は、装着溝２の長手方向ＬＤの長さＬ２より僅かに小さい程度である。なお、薄板３の長さＬ３及び装着溝２の長さＬ２は、線Ｃ１上での長さである。 The length L3 of the thin plate 3 in the longitudinal direction LD is slightly smaller than the length L2 of the mounting groove 2 in the longitudinal direction LD. Note that the length L3 of the thin plate 3 and the length L2 of the mounting groove 2 are lengths on the line C1.

薄板３の短手方向ＷＤの幅Ｗ３は、装着溝２の短手方向ＷＤの幅Ｗ２より僅かに小さい程度である。そのため、装着溝２と薄板３との隙間からゴムが入り込みにくい。なお、装着溝２の長手方向ＬＤの長さＬ２は、装着溝２の短手方向ＷＤの幅Ｗ２の５倍以上とするのが好ましい。 The width W3 of the thin plate 3 in the short direction WD is slightly smaller than the width W2 of the mounting groove 2 in the short direction WD. Therefore, rubber is less likely to get into the gap between the mounting groove 2 and the thin plate 3. It is preferable that the length L2 of the mounting groove 2 in the longitudinal direction LD be 5 times or more the width W2 of the mounting groove 2 in the short direction WD.

薄板３は、長手方向ＬＤの両端部に、ねじ４を取り付けるための貫通孔３９を有している。貫通孔３９は丸穴である。ねじ４は、貫通孔３９を介して、装着溝２の底面２０にあるねじ穴２５に螺着される。貫通孔３９の穴径は、ねじ４の直径に対し０．５～１．０ｍｍ程度大きい。装着溝２の溝深さＤ２は、例えば、１．２ｍｍに設定される。 The thin plate 3 has through holes 39 at both ends in the longitudinal direction LD for attaching the screws 4. The through holes 39 are round holes. The screws 4 are screwed into the threaded holes 25 in the bottom surface 20 of the mounting groove 2 through the through holes 39. The hole diameter of the through holes 39 is approximately 0.5 to 1.0 mm larger than the diameter of the screws 4. The groove depth D2 of the mounting groove 2 is set to, for example, 1.2 mm.

薄板３は、キャビティ１６に対向する正面３１と、装着溝２の底面２０に対向する背面３２と、を有する。加硫成型時には、薄板３の正面３１にタイヤＴの外表面が押し当てられ、凹凸形成部５によって標識等がタイヤＴの外表面に転写形成される。正面３１及び背面３２は、凹凸形成部５の凹凸を除いて平面状である。正面３１は、タイヤ成型面１よりも装着溝２の底面２０に近い。 The thin plate 3 has a front surface 31 facing the cavity 16 and a back surface 32 facing the bottom surface 20 of the mounting groove 2. During vulcanization molding, the outer surface of the tire T is pressed against the front surface 31 of the thin plate 3, and the unevenness forming section 5 transfers and forms marks and the like on the outer surface of the tire T. The front surface 31 and the back surface 32 are flat except for the unevenness of the unevenness forming section 5. The front surface 31 is closer to the bottom surface 20 of the mounting groove 2 than the tire molding surface 1.

本実施形態では、正面３１に、タイヤの外表面に凸状の標識を形成するための凹部３４が設けられている。凹部３４は、例えば、正面３１側からのエンボス加工（浮き出し工法）により陥没形成される。背面３２には、凹部３４に対応した凸部３６（凸状膨出部に相当する）がある。凸部３６は、凹部３４を陥没形成したことに伴って形成される。したがって、凸部３６は、薄板３の背面３２側から凹部３４を見たものとなる。 In this embodiment, the front surface 31 is provided with a recess 34 for forming a convex mark on the outer surface of the tire. The recess 34 is formed, for example, by embossing from the front surface 31 side. The back surface 32 has a protrusion 36 (corresponding to a convex bulge) corresponding to the recess 34. The protrusion 36 is formed when the recess 34 is recessed. Therefore, the protrusion 36 is what the recess 34 looks like when viewed from the back surface 32 side of the thin plate 3.

本実施形態における薄板３は、タイヤの外表面に凸状の標識を形成するためのものであるが、タイヤの外表面に凹状の標識や模様を形成するための凹凸部をさらに備えてもよい。 In this embodiment, the thin plate 3 is for forming convex markings on the outer surface of the tire, but it may also be provided with an uneven portion for forming concave markings or patterns on the outer surface of the tire.

薄板３は、軟鋼若しくは極軟鋼の板材で形成するとよい。軟鋼若しくは極軟鋼としては、ＪＩＳ Ｇ３１４１に規定の冷間圧延鋼板及び鋼帯が例示される。薄板３の厚みＴ３（図４参照）は、加工の容易性等の観点から、例えば、１ｍｍ以下が好ましく、０．６ｍｍ以下がより好ましい。厚みＴ３は、薄板３に適度な強度を付与するなどの観点から、０．３ｍｍ以上が好ましい。 The thin plate 3 may be formed from a plate material of mild steel or very mild steel. Examples of mild steel or very mild steel include cold-rolled steel plate and steel strip as specified in JIS G3141. From the viewpoint of ease of processing, the thickness T3 of the thin plate 3 (see FIG. 4) is preferably, for example, 1 mm or less, and more preferably 0.6 mm or less. From the viewpoint of imparting appropriate strength to the thin plate 3, the thickness T3 is preferably 0.3 mm or more.

装着溝２の底面２０と、薄板３の凹凸形成部５を除く背面３２との間に、嵩上げ部材６が位置する。嵩上げ部材６は、薄板３の縁に沿って配置され、凸部３６を取り巻く中空領域６０を有する。嵩上げ部材６は、薄板３を載置する底面２０を部分的に高くするために使用される。嵩上げ部材６の厚みＴ６（図４参照）は、装着溝２の溝深さＤ２よりも小さい。また、嵩上げ部材６の厚みＴ６は、薄板３の厚みＴ３よりも大きい。 The raising member 6 is located between the bottom surface 20 of the mounting groove 2 and the back surface 32 of the thin plate 3 excluding the uneven portion 5. The raising member 6 is disposed along the edge of the thin plate 3 and has a hollow area 60 surrounding the protrusion 36. The raising member 6 is used to partially raise the bottom surface 20 on which the thin plate 3 is placed. The thickness T6 (see FIG. 4) of the raising member 6 is smaller than the groove depth D2 of the mounting groove 2. The thickness T6 of the raising member 6 is also larger than the thickness T3 of the thin plate 3.

嵩上げ部材６の厚みＴ６と凸部３６の突出量Ｔ３６（図４参照）は、同程度に設定される。嵩上げ部材６の厚みＴ６と凸部３６の突出量Ｔ３６が同程度であれば、タイヤ加硫成型時、嵩上げ部材６及び凸部３６の先端３６ａのみがタイヤ加硫成型時に付与される成型圧力によって装着溝２の底面２０に当接する。嵩上げ部材６の厚みＴ６が凸部３６の突出量Ｔ３６より僅かに小さい場合、加硫成型前は薄板３の背面３２が嵩上げ部材６から僅かに離れているが、加硫成型時の成型圧力により薄板３が変形することで、薄板３の背面３２と嵩上げ部材６との接触が実現される。一方、嵩上げ部材６の厚みＴ６が凸部３６の突出量Ｔ３６より僅かに大きい場合、加硫成型前は凸部３６の先端３６ａが装着溝２の底面２０から僅かに離れているが、加硫成型時の成型圧力により薄板３が変形することで、凸部３６の先端３６ａと装着溝２の底面２０との接触が実現される。一方、薄板３が加硫成型時の成型圧力によって大きく撓んで、凸部３６の先端３６ａ以外の箇所が装着溝２の底面２０に接触することはない。このように嵩上げ部材６及び凸部３６の先端３６ａのみがタイヤ加硫成型時に付与される成型圧力によって装着溝２の底面２０に当接するように構成することで、嵩上げ部材６と薄板３の接触圧力を高めて、両者の界面からのゴム流入を抑制することができる。その結果、加硫成型後のタイヤにおける標識の識別性を確保し、外観不良を抑制できる。 The thickness T6 of the bulking member 6 and the protruding amount T36 of the convex portion 36 (see FIG. 4) are set to be approximately the same. If the thickness T6 of the bulking member 6 and the protruding amount T36 of the convex portion 36 are approximately the same, only the bulking member 6 and the tip 36a of the convex portion 36 abut against the bottom surface 20 of the mounting groove 2 due to the molding pressure applied during tire vulcanization molding. If the thickness T6 of the bulking member 6 is slightly smaller than the protruding amount T36 of the convex portion 36, the back surface 32 of the thin plate 3 is slightly separated from the bulking member 6 before vulcanization molding, but the thin plate 3 is deformed by the molding pressure during vulcanization molding, so that the back surface 32 of the thin plate 3 and the bulking member 6 come into contact with each other. On the other hand, when the thickness T6 of the raising member 6 is slightly larger than the protruding amount T36 of the convex portion 36, the tip 36a of the convex portion 36 is slightly separated from the bottom surface 20 of the mounting groove 2 before vulcanization molding, but the thin plate 3 is deformed by the molding pressure during vulcanization molding, so that the tip 36a of the convex portion 36 comes into contact with the bottom surface 20 of the mounting groove 2. On the other hand, the thin plate 3 is greatly deflected by the molding pressure during vulcanization molding, and no part other than the tip 36a of the convex portion 36 comes into contact with the bottom surface 20 of the mounting groove 2. By configuring in this way so that only the raising member 6 and the tip 36a of the convex portion 36 come into contact with the bottom surface 20 of the mounting groove 2 by the molding pressure applied during tire vulcanization molding, the contact pressure between the raising member 6 and the thin plate 3 can be increased to suppress the inflow of rubber from the interface between the two. As a result, the identifiability of the mark in the tire after vulcanization molding can be ensured, and poor appearance can be suppressed.

嵩上げ部材６の厚みＴ６は、凸部３６の突出量Ｔ３６の８５％～１２５％であるのが好ましい。嵩上げ部材６の厚みＴ６がこの範囲であれば、加硫成型時に凸部３６の先端３６ａと装着溝２の底面２０との接触によって嵩上げ部材６と薄板３の接触が損なわれることを防止できる。なお、加硫成型時の成型圧力により薄板３が変形するため、嵩上げ部材６の厚みＴ６が凸部３６の突出量Ｔ３６の１００％未満であっても加硫成型時に嵩上げ部材６と薄板３の接触は実現できるが、嵩上げ部材６の厚みＴ６は、凸部３６の突出量Ｔ３６の１００％以上であるのがより好ましい。厚みＴ６は、例えば、０．６ｍｍ以上であるとよく、０．９ｍｍ以下であるとよい。本実施形態の嵩上げ部材６の厚みＴ６は、０．８ｍｍである。 The thickness T6 of the bulking member 6 is preferably 85% to 125% of the protruding amount T36 of the convex portion 36. If the thickness T6 of the bulking member 6 is in this range, the contact between the bulking member 6 and the thin plate 3 is prevented from being impaired by contact between the tip 36a of the convex portion 36 and the bottom surface 20 of the mounting groove 2 during vulcanization molding. Since the thin plate 3 is deformed by the molding pressure during vulcanization molding, the contact between the bulking member 6 and the thin plate 3 during vulcanization molding can be realized even if the thickness T6 of the bulking member 6 is less than 100% of the protruding amount T36 of the convex portion 36, but it is more preferable that the thickness T6 of the bulking member 6 is 100% or more of the protruding amount T36 of the convex portion 36. For example, the thickness T6 may be 0.6 mm or more, and 0.9 mm or less. The thickness T6 of the bulking member 6 in this embodiment is 0.8 mm.

また、凸部３６の先端３６ａと装着溝２の底面２０との間隔は、０．１ｍｍ以下が好ましく、０．０５ｍｍ以下がより好ましい。凸部３６の先端３６ａと装着溝２の底面２０との間に０．１ｍｍを越える隙間がある場合、加硫成型時の成型圧力により薄板３が過度に装着溝２に陥没することとなり、薄板３の外縁が浮き上がり、嵩上げ部材６との接触性が悪化する。 The distance between the tip 36a of the protrusion 36 and the bottom surface 20 of the mounting groove 2 is preferably 0.1 mm or less, and more preferably 0.05 mm or less. If there is a gap of more than 0.1 mm between the tip 36a of the protrusion 36 and the bottom surface 20 of the mounting groove 2, the molding pressure during vulcanization molding will cause the thin plate 3 to sink excessively into the mounting groove 2, causing the outer edge of the thin plate 3 to rise, and the contact with the raising member 6 will deteriorate.

嵩上げ部材６は、硬さＨＶ３００以上、及び引っ張り強さ９００Ｎ／ｍｍ２以上の特性を持つように処理された鉄系金属、例えばステンレスで形成されるのが好ましい。ここで、硬さは、ＪＩＳ Ｚ２２４４に準拠した硬さ試験により測定されるものを意味する。また、引っ張り強さは、ＪＩＳ Ｚ２２４１に準拠した引張試験により測定されるものを意味する。嵩上げ部材６がばね性を有するようにするため、嵩上げ部材６は弾性に富む材料で形成される。 The bulking member 6 is preferably formed of an iron-based metal, such as stainless steel, that has been treated to have a hardness of HV 300 or more and a tensile strength of 900 N/mm2 or more . Here, the hardness refers to a value measured by a hardness test conforming to JIS Z2244. The tensile strength refers to a value measured by a tensile test conforming to JIS Z2241. In order to make the bulking member 6 have spring properties, the bulking member 6 is formed of a material having high elasticity.

嵩上げ部材６は、装着溝２に装着される際に装着溝２の底面２０に対向する面が凹又は凸となるように長手方向ＬＤに湾曲しているのが好ましい。装着溝２の溝深さＤ２をタイヤ成型面１に対して同一深さとした場合、タイヤ赤道を通る平面からの距離は、装着溝２の長手方向ＬＤの両端部と、装着溝２の長手方向ＬＤの中央部とにおいて同一とはならない。よって、装着溝２の底面２０に嵩上げ部材６を添わせるため、装着溝２を長手方向ＬＤに湾曲させるのが好ましい。 It is preferable that the bulking member 6 is curved in the longitudinal direction LD so that the surface facing the bottom surface 20 of the mounting groove 2 when it is mounted in the mounting groove 2 is concave or convex. If the groove depth D2 of the mounting groove 2 is the same depth relative to the tire molding surface 1, the distance from the plane passing through the tire equator will not be the same at both ends of the mounting groove 2 in the longitudinal direction LD and at the center of the mounting groove 2 in the longitudinal direction LD. Therefore, in order to fit the bulking member 6 to the bottom surface 20 of the mounting groove 2, it is preferable to curve the mounting groove 2 in the longitudinal direction LD.

図５は、図４で示された嵩上げ部材６を平面図で示している。図５（ａ）は、装着溝２に非装着の状態（以下、非装着状態ともいう）の嵩上げ部材６の平面図であり、図５（ｂ）は装着溝２に装着された状態（以下、装着状態ともいう）の嵩上げ部材６の平面図である。図６は、図５（ａ）に示す嵩上げ部材６のVI領域拡大図である。 Figure 5 shows a plan view of the raising member 6 shown in Figure 4. Figure 5(a) is a plan view of the raising member 6 when not attached to the attachment groove 2 (hereinafter also referred to as the non-attached state), and Figure 5(b) is a plan view of the raising member 6 when attached to the attachment groove 2 (hereinafter also referred to as the attached state). Figure 6 is an enlarged view of region VI of the raising member 6 shown in Figure 5(a).

嵩上げ部材６は、中央に中空領域６０を有する枠形状を呈する。嵩上げ部材６は、長手方向ＬＤに延びる一対の第１長手方向部材６１及び第２長手方向部材６２と、一対の第１長手方向部材６１及び第２長手方向部材６２の端部同士を接続する一対の第１短手方向部材６３及び第２短手方向部材６４と、を有する。第１長手方向部材６１及び第２長手方向部材６２は、何れもタイヤ径方向外側に凸となる円弧状を呈する。第１長手方向部材６１及び第２長手方向部材６２は、平面視で何れも長手方向ＬＤに沿って湾曲した形状である。 The raising member 6 has a frame shape with a hollow area 60 in the center. The raising member 6 has a pair of first longitudinal members 61 and second longitudinal members 62 extending in the longitudinal direction LD, and a pair of first short members 63 and second short members 64 connecting the ends of the pair of first longitudinal members 61 and second longitudinal members 62. The first longitudinal members 61 and second longitudinal members 62 each have an arc shape that is convex toward the outside in the tire radial direction. The first longitudinal members 61 and second longitudinal members 62 each have a curved shape along the longitudinal direction LD in a plan view.

図５（ｂ）に示す装着状態の嵩上げ部材６において、第１長手方向部材６１は、装着溝２の一対の第１長手方向側壁２１及び第２長手方向側壁２２のうちタイヤ径方向外側の第１長手方向側壁２１に接触され、第２長手方向部材６２は、装着溝２の一対の第１長手方向側壁２１及び第２長手方向側壁２２のうちタイヤ径方向内側の第２長手方向側壁２２に接触される。なお、第１長手方向部材６１が第１長手方向側壁２１に接触するとは、第１長手方向側壁２１の長手方向ＬＤの全体に接触する形態のみならず、第１長手方向側壁２１の長手方向ＬＤの一部に接触する形態も含む。例えば、第１長手方向部材６１の長手方向ＬＤの両端が第１長手方向側壁２１から僅かに離れていてもよい。同様に、第２長手方向部材６２が第２長手方向側壁２２に接触するとは、第２長手方向側壁２２の長手方向ＬＤの全体に接触する形態のみならず、第２長手方向側壁２２の一部に接触する形態も含む。 In the raised member 6 in the mounted state shown in FIG. 5(b), the first longitudinal member 61 is in contact with the first longitudinal sidewall 21 on the outer side in the tire radial direction of the pair of first longitudinal sidewalls 21 and second longitudinal sidewalls 22 of the mounting groove 2, and the second longitudinal member 62 is in contact with the second longitudinal sidewall 22 on the inner side in the tire radial direction of the pair of first longitudinal sidewalls 21 and second longitudinal sidewalls 22 of the mounting groove 2. The first longitudinal member 61 in contact with the first longitudinal sidewall 21 includes not only a form in which the first longitudinal member 61 is in contact with the entire longitudinal direction LD of the first longitudinal sidewall 21, but also a form in which the first longitudinal member 61 is in contact with a part of the longitudinal direction LD of the first longitudinal sidewall 21. For example, both ends of the first longitudinal member 61 in the longitudinal direction LD may be slightly separated from the first longitudinal sidewall 21. Similarly, when the second longitudinal member 62 contacts the second longitudinal sidewall 22, this includes not only contacting the entirety of the second longitudinal sidewall 22 in the longitudinal direction LD, but also contacting only a portion of the second longitudinal sidewall 22.

装着状態において、嵩上げ部材６の長手方向ＬＤの長さＬ６は、装着溝２の長手方向ＬＤの長さＬ２よりも僅かに小さくなるように形成される。すなわち、第１短手方向部材６３と第１短手方向側壁２３との間、又は第２短手方向部材６４と第２短手方向側壁２４との間には僅かな隙間がある。なお、嵩上げ部材６の長手方向ＬＤの長さＬ６は、薄板３の長手方向ＬＤの長さＬ３（図２参照）よりも僅かに小さい。 In the mounted state, the length L6 of the longitudinal direction LD of the raising member 6 is formed to be slightly smaller than the length L2 of the longitudinal direction LD of the mounting groove 2. That is, there is a small gap between the first short-side member 63 and the first short-side side wall 23, or between the second short-side member 64 and the second short-side side wall 24. The length L6 of the longitudinal direction LD of the raising member 6 is slightly smaller than the length L3 of the longitudinal direction LD of the thin plate 3 (see FIG. 2).

図５（ａ）に示す非装着状態の嵩上げ部材６において、タイヤ径方向外側の第１長手方向部材６１の曲率半径Ｒ６１は、タイヤ径方向内側の第２長手方向部材６２の曲率半径Ｒ６２より小さい。ここで、曲率半径Ｒ６１は、第１長手方向部材６１の短手方向ＷＤ外側の外縁の曲率半径であり、曲率半径Ｒ６２は、第２長手方向部材６２の短手方向ＷＤ外側の外縁の曲率半径である。 In the non-attached bulkhead member 6 shown in FIG. 5(a), the radius of curvature R61 of the first longitudinal member 61 on the outer side in the tire radial direction is smaller than the radius of curvature R62 of the second longitudinal member 62 on the inner side in the tire radial direction. Here, the radius of curvature R61 is the radius of curvature of the outer edge of the first longitudinal member 61 on the outer side in the short direction WD, and the radius of curvature R62 is the radius of curvature of the outer edge of the second longitudinal member 62 on the outer side in the short direction WD.

図５（ａ）には装着溝２の第１長手方向側壁２１及び第２長手方向側壁２２が２点鎖線で示されている。このように、非装着状態において、第１長手方向部材６１の曲率半径Ｒ６１は、装着溝２の第１長手方向側壁２１の曲率半径Ｒ２１よりも小さく、かつ第２長手方向部材６２の曲率半径Ｒ６２は、第２長手方向側壁２２の曲率半径Ｒ２２よりも大きい。そのため、非装着状態において、第１長手方向部材６１の外縁と第２長手方向部材６２の外縁との短手方向ＷＤにおける距離は、装着溝２の幅Ｗ２よりも大きい。 In FIG. 5(a), the first longitudinal side wall 21 and the second longitudinal side wall 22 of the mounting groove 2 are shown by two-dot chain lines. Thus, in the non-mounted state, the radius of curvature R61 of the first longitudinal member 61 is smaller than the radius of curvature R21 of the first longitudinal side wall 21 of the mounting groove 2, and the radius of curvature R62 of the second longitudinal member 62 is larger than the radius of curvature R22 of the second longitudinal side wall 22. Therefore, in the non-mounted state, the distance in the short direction WD between the outer edge of the first longitudinal member 61 and the outer edge of the second longitudinal member 62 is larger than the width W2 of the mounting groove 2.

嵩上げ部材６は、ばね性を有しており、装着溝２に装着される際、装着溝２の幅Ｗ２より小さい幅となるように第１長手方向部材６１と第２長手方向部材６２を互いに近付ける向きに圧縮された状態にて装着溝２に挿入される。すなわち、嵩上げ部材６は、装着溝２の一対の長手方向側壁２１，２２に作用する圧縮応力が発生するように装着溝２へ装着される。これにより、嵩上げ部材６の装着溝２への装着及び固定が容易となり、また嵩上げ部材６の脱落を抑制できる。さらに、装着状態において、嵩上げ部材６の第１長手方向部材６１と第２長手方向部材６２が装着溝２の第１長手方向側壁２１と第２長手方向側壁２２にそれぞれ加圧接触されるため、第１長手方向部材６１と第１長手方向側壁２１との間、及び第２長手方向部材６２と第２長手方向側壁２２との間からのゴム流入を抑制することができる。 The bulking member 6 has a spring property, and when it is attached to the mounting groove 2, the first longitudinal member 61 and the second longitudinal member 62 are inserted into the mounting groove 2 in a compressed state in a direction in which they approach each other so that the width is smaller than the width W2 of the mounting groove 2. That is, the bulking member 6 is attached to the mounting groove 2 so that a compressive stress acting on a pair of longitudinal side walls 21, 22 of the mounting groove 2 is generated. This makes it easy to attach and fix the bulking member 6 to the mounting groove 2, and also makes it possible to suppress the bulking member 6 from falling off. Furthermore, in the attached state, the first longitudinal member 61 and the second longitudinal member 62 of the bulking member 6 are in pressure contact with the first longitudinal side wall 21 and the second longitudinal side wall 22 of the mounting groove 2, respectively, so that the inflow of rubber from between the first longitudinal member 61 and the first longitudinal side wall 21 and between the second longitudinal member 62 and the second longitudinal side wall 22 can be suppressed.

第１長手方向部材６１の曲率半径Ｒ６１と第１長手方向側壁２１の曲率半径Ｒ２１の差は、２０～１００ｍｍが好ましい。曲率半径Ｒ６１と曲率半径Ｒ２１の差がこの範囲であれば、第１長手方向部材６１と第１長手方向側壁２１が全体に亘って均一な接触圧で互いに接触する。また、第２長手方向部材６２の曲率半径Ｒ６２と第２長手方向側壁２２の曲率半径Ｒ２２の差は、例えば５０～３００ｍｍが好ましい。曲率半径Ｒ６２と曲率半径Ｒ２２の差がこの範囲であれば、第２長手方向部材６２と第２長手方向側壁２２が全体に亘って均一な接触圧で互いに接触する。 The difference between the radius of curvature R61 of the first longitudinal member 61 and the radius of curvature R21 of the first longitudinal sidewall 21 is preferably 20 to 100 mm. If the difference between the radius of curvature R61 and the radius of curvature R21 is within this range, the first longitudinal member 61 and the first longitudinal sidewall 21 will contact each other with a uniform contact pressure over the entirety. Also, the difference between the radius of curvature R62 of the second longitudinal member 62 and the radius of curvature R22 of the second longitudinal sidewall 22 is preferably, for example, 50 to 300 mm. If the difference between the radius of curvature R62 and the radius of curvature R22 is within this range, the second longitudinal member 62 and the second longitudinal sidewall 22 will contact each other with a uniform contact pressure over the entirety.

第１長手方向部材６１の幅Ｗ６１及び第２長手方向部材６２の幅Ｗ６２は、長手方向ＬＤに一定である。第１長手方向部材６１の幅Ｗ６１及び第２長手方向部材６２の幅Ｗ６２を一定とすることで、第１長手方向部材６１と第１長手方向側壁２１の接触圧、及び第２長手方向部材６２と第２長手方向側壁２２の接触圧を均一にすることができる。なお、第１長手方向部材６１の幅Ｗ６１と第２長手方向部材６２の幅Ｗ６２は等しいのが好ましい。第１長手方向部材６１の幅Ｗ６１及び第２長手方向部材６２の幅Ｗ６２は、２ｍｍ以下が好ましく、１．５ｍｍ以下がより好ましく、本実施形態では例えば１．２ｍｍである。第１長手方向部材６１の幅Ｗ６１及び第２長手方向部材６２の幅Ｗ６２が２ｍｍを超えると、装着溝２へ装着する際に嵩上げ部材６を圧縮する力が大きくなり、装着性が劣る。 The width W61 of the first longitudinal member 61 and the width W62 of the second longitudinal member 62 are constant in the longitudinal direction LD. By making the width W61 of the first longitudinal member 61 and the width W62 of the second longitudinal member 62 constant, the contact pressure between the first longitudinal member 61 and the first longitudinal sidewall 21, and the contact pressure between the second longitudinal member 62 and the second longitudinal sidewall 22 can be made uniform. It is preferable that the width W61 of the first longitudinal member 61 and the width W62 of the second longitudinal member 62 are equal. The width W61 of the first longitudinal member 61 and the width W62 of the second longitudinal member 62 are preferably 2 mm or less, more preferably 1.5 mm or less, and in this embodiment, for example, 1.2 mm. If the width W61 of the first longitudinal member 61 and the width W62 of the second longitudinal member 62 exceed 2 mm, the force compressing the raising member 6 when it is attached to the attachment groove 2 becomes large, and the attachment property is deteriorated.

また、装着状態において、中空領域６０の短手方向ＷＤの幅Ｗ６０、すなわち第１長手方向部材６１と第２長手方向部材６２の短手方向ＷＤにおける間隔は、長手方向ＬＤに一定であるのが好ましい。 In addition, in the installed state, it is preferable that the width W60 of the hollow region 60 in the short direction WD, i.e., the distance between the first longitudinal member 61 and the second longitudinal member 62 in the short direction WD, is constant in the longitudinal direction LD.

第１短手方向部材６３及び第２短手方向部材６４は、何れも半円弧状である。第１短手方向部材６３の外縁６３ａ及び第２短手方向部材６４の外縁６４ａの形状は、装着溝２の第１短手方向側壁２３及び第２短手方向側壁２４の形状と同様の形状を有するとよい。 The first short-side member 63 and the second short-side member 64 are both semicircular. The shapes of the outer edge 63a of the first short-side member 63 and the outer edge 64a of the second short-side member 64 may be similar to the shapes of the first short-side side wall 23 and the second short-side side wall 24 of the mounting groove 2.

第１短手方向部材６３及び第２短手方向部材６４の内縁６３ｂ，６４ｂは、長手方向ＬＤの内側へ向かって突出する一対の突起６５，６５を有する。また、嵩上げ部材６には長手方向ＬＤに延びる切欠き６９が形成されており、一対の突起６５，６５は、第１長手方向部材６１及び第２長手方向部材６２から離れている。図６に示すように、一対の突起６５，６５は、突起６５の突出端に、互いに近付く向きに延びる屈曲部６５ａをそれぞれ有する。これにより、突起６５は、全体として略Ｌ字状を呈する。対向する屈曲部６５ａの間には隙間Ｗ６５が設けられている。また、第１短手方向部材６３又は第２短手方向部材６４と一対の突起６５，６５とは、全体としてＣ字状を呈する。 The inner edges 63b, 64b of the first short-side member 63 and the second short-side member 64 have a pair of protrusions 65, 65 that protrude inward in the longitudinal direction LD. In addition, a notch 69 extending in the longitudinal direction LD is formed in the raising member 6, and the pair of protrusions 65, 65 are spaced apart from the first longitudinal member 61 and the second longitudinal member 62. As shown in FIG. 6, the pair of protrusions 65, 65 each have a bent portion 65a at the protruding end of the protrusion 65 that extends toward each other. As a result, the protrusion 65 has a substantially L-shape as a whole. A gap W65 is provided between the opposing bent portions 65a. In addition, the first short-side member 63 or the second short-side member 64 and the pair of protrusions 65, 65 have a C-shape as a whole.

第１短手方向部材６３及び第２短手方向部材６４の内縁６３ｂ，６４ｂと一対の突起６５，６５で形成される長孔６６は、ねじ４を取り付けるための取付孔となる。嵩上げ部材６の装着時の位置ずれ、及び装着溝２のねじ穴２５の加工精度を考慮し、長孔６６は、長辺寸法が短辺寸法に対し０．５～２．０ｍｍ拡大した形状とするのが好ましい。長孔６６の短辺寸法は、ねじ４の直径に対し０．５～１．０ｍｍ程度大きい。 The long hole 66 formed by the inner edges 63b, 64b of the first short-side member 63 and the second short-side member 64 and the pair of protrusions 65, 65 serves as an attachment hole for attaching the screw 4. Considering the positional deviation when the raising member 6 is attached and the machining accuracy of the screw hole 25 of the attachment groove 2, it is preferable that the long side dimension of the long hole 66 is 0.5 to 2.0 mm larger than the short side dimension. The short side dimension of the long hole 66 is approximately 0.5 to 1.0 mm larger than the diameter of the screw 4.

第１短手方向部材６３に設けられた一対の突起６５，６５と第２短手方向部材６４に設けられた一対の突起６５，６５とに挟まれた領域が、上記の中空領域６０である。図５（ａ）に示すように、第１長手方向部材６１の長さＬ６１及び第２長手方向部材６２の長さＬ６２は、何れも中空領域６０の長さＬ６０を超える。これにより、第１長手方向部材６１の長さＬ６１及び第２長手方向部材６２の長さＬ６２を確保して、嵩上げ部材６の装着溝２への固定力を強化することができる。 The region sandwiched between a pair of protrusions 65, 65 provided on the first short-side member 63 and a pair of protrusions 65, 65 provided on the second short-side member 64 is the hollow region 60. As shown in FIG. 5(a), the length L61 of the first long-side member 61 and the length L62 of the second long-side member 62 both exceed the length L60 of the hollow region 60. This ensures the length L61 of the first long-side member 61 and the length L62 of the second long-side member 62, and strengthens the fixing force of the raising member 6 to the mounting groove 2.

第１短手方向部材６３の幅Ｗ６３及び第２短手方向部材６４の幅Ｗ６４は、例えば２．５～４．０ｍｍである。また、第１短手方向部材６３の幅Ｗ６３及び第２短手方向部材６４の幅Ｗ６４は、第１長手方向部材６１の幅Ｗ６１及び第２長手方向部材６２の幅Ｗ６２の２倍以上であるのが好ましい。これにより、第１長手方向部材６１及び第２長手方向部材６２に生ずるばね効果を第１短手方向部材６３及び第２短手方向部材６４に比べ大きくすることができ、装着溝２に対する固定保持効果を得やすくなる。 The width W63 of the first short member 63 and the width W64 of the second short member 64 are, for example, 2.5 to 4.0 mm. Furthermore, it is preferable that the width W63 of the first short member 63 and the width W64 of the second short member 64 are at least twice the width W61 of the first long member 61 and the width W62 of the second long member 62. This makes it possible to increase the spring effect of the first long member 61 and the second long member 62 compared to the first short member 63 and the second short member 64, making it easier to obtain a fixed holding effect in the mounting groove 2.

第１短手方向部材６３及び第２短手方向部材６４の短手方向ＷＤの中央部には、第１短手方向部材６３及び第２短手方向部材６４の内縁６３ｂ，６４ｂから外縁６３ａ，６４ａへ向かって長手方向ＬＤに延びる切込み６７が形成されている。切込み６７を形成することで、切込み６７と第１短手方向部材６３及び第２短手方向部材６４の外縁６３ａ，６４ａとの間に幅狭領域６８が形成される。これにより、第１短手方向部材６３及び第２短手方向部材６４が幅狭領域６８を支点として弾性変形しやすくなり、第１長手方向部材６１及び第２長手方向部材６２のばね性を高めることができる。 A notch 67 is formed in the center of the short direction WD of the first short member 63 and the second short member 64, extending in the longitudinal direction LD from the inner edges 63b, 64b of the first short member 63 and the second short member 64 toward the outer edges 63a, 64a. By forming the notch 67, a narrow region 68 is formed between the notch 67 and the outer edges 63a, 64a of the first short member 63 and the second short member 64. This makes it easier for the first short member 63 and the second short member 64 to elastically deform with the narrow region 68 as a fulcrum, and the springiness of the first longitudinal member 61 and the second longitudinal member 62 can be improved.

切込み６７は、一定幅で延びるスリットである。ただし、切込み６７の形状は一定幅のスリットに限定されず、不等幅のスリット、先割れ状のスリット等でもよい。また、本実施形態の切込み６７の幅Ｗ６７は、屈曲部６５ａの隙間Ｗ６５と同じとなっているが、これに限定されない。切込み６７の幅Ｗ６７を屈曲部６５ａの隙間Ｗ６５よりも大きくしてもよい。切込み６７の幅Ｗ６７を大きくすることで、第１短手方向部材６３及び第２短手方向部材６４が幅狭領域６８を支点としてさらに弾性変形しやすくなる。 The notch 67 is a slit that extends with a constant width. However, the shape of the notch 67 is not limited to a slit with a constant width, and may be a slit with an unequal width, a forked slit, or the like. In addition, the width W67 of the notch 67 in this embodiment is the same as the gap W65 of the bent portion 65a, but is not limited to this. The width W67 of the notch 67 may be larger than the gap W65 of the bent portion 65a. By increasing the width W67 of the notch 67, the first short-side member 63 and the second short-side member 64 are more likely to elastically deform with the narrow region 68 as a fulcrum.

幅狭領域６８の幅Ｗ６８は、第１長手方向部材６１の幅Ｗ６１及び第２長手方向部材６２の幅Ｗ６２より小さいのが好ましい。これにより、第１長手方向部材６１及び第２長手方向部材６２に効果的にばね性を付与することができる。 The width W68 of the narrow region 68 is preferably smaller than the width W61 of the first longitudinal member 61 and the width W62 of the second longitudinal member 62. This effectively imparts springiness to the first longitudinal member 61 and the second longitudinal member 62.

以上のように、本実施形態に係るタイヤ加硫金型１０は、タイヤの外表面に標識又は模様を転写形成するための薄板３と、薄板３が装着される装着溝２と、薄板３と装着溝２の底面２０との間に配置される嵩上げ部材６と、薄板３と嵩上げ部材６を装着溝２へ固定するための締結部材４と、を備え、薄板３は、装着溝２の底面２０へ向かって突出する凸状膨出部３６を有し、嵩上げ部材６は、薄板３の縁に沿って配置され、凸状膨出部３６を取り巻く中空領域６０を有する。 As described above, the tire vulcanization mold 10 according to this embodiment includes a thin plate 3 for transferring a mark or pattern onto the outer surface of the tire, a mounting groove 2 into which the thin plate 3 is mounted, a bulking member 6 disposed between the thin plate 3 and the bottom surface 20 of the mounting groove 2, and a fastening member 4 for fixing the thin plate 3 and bulking member 6 to the mounting groove 2. The thin plate 3 has a convex bulge 36 that protrudes toward the bottom surface 20 of the mounting groove 2, and the bulking member 6 is disposed along the edge of the thin plate 3 and has a hollow region 60 that surrounds the convex bulge 36.

この構成によれば、嵩上げ部材６と薄板３の接触圧力を高めて、両者の界面からのゴム流入を抑制することができる。その結果、加硫成型後のタイヤにおける標識の識別性を確保し、外観不良を抑制できる。 This configuration increases the contact pressure between the bulkhead 6 and the thin plate 3, suppressing the inflow of rubber from the interface between the two. As a result, the identifiability of the markings in the tire after vulcanization is ensured, and poor appearance can be suppressed.

また、本実施形態に係るタイヤ加硫金型１０においては、装着溝２は、タイヤ周方向の長さがタイヤ径方向の長さよりも大きい長手形状をなし、嵩上げ部材６は、ばね性を有するように形成され、装着溝２の長手方向ＬＤに延びる一対の長手方向側壁２１，２２へ加圧接触されて装着溝２へ装着される、という構成である。 In addition, in the tire vulcanizing mold 10 according to this embodiment, the mounting groove 2 has a longitudinal shape in which the length in the tire circumferential direction is greater than the length in the tire radial direction, and the bulkhead member 6 is formed to have spring properties and is mounted in the mounting groove 2 by being pressed into contact with a pair of longitudinal side walls 21, 22 extending in the longitudinal direction LD of the mounting groove 2.

この構成によれば、嵩上げ部材６の装着溝２への装着及び固定が容易となり、また嵩上げ部材６の脱落を抑制できる。さらに、嵩上げ部材６と一対の長手方向側壁２１，２２の間からのゴム流入を抑制することができる。 This configuration makes it easy to attach and fix the bulkhead member 6 to the mounting groove 2, and also prevents the bulkhead member 6 from falling off. Furthermore, it prevents rubber from flowing in between the bulkhead member 6 and the pair of longitudinal side walls 21, 22.

また、本実施形態に係るタイヤ加硫金型１０においては、装着溝２の短手方向ＷＤの幅Ｗ２は、長手方向ＬＤに一定であり、嵩上げ部材６は、装着溝２の長手方向側壁２１，２２に接触する一対の長手方向部材６１，６２と、一対の長手方向部材６１，６２の端部同士を接続する一対の短手方向部材６３，６４と、を有し、長手方向部材６１，６２の幅Ｗ６１，Ｗ６２は一定であり、長手方向部材６１，６２の長さＬ６１，Ｌ６２は中空領域６０の長さＬ６０を超える、という構成である。 In addition, in the tire vulcanizing mold 10 according to this embodiment, the width W2 in the short direction WD of the mounting groove 2 is constant in the longitudinal direction LD, the bulkhead member 6 has a pair of longitudinal members 61, 62 that contact the longitudinal side walls 21, 22 of the mounting groove 2, and a pair of short members 63, 64 that connect the ends of the pair of longitudinal members 61, 62, the widths W61, W62 of the longitudinal members 61, 62 are constant, and the lengths L61, L62 of the longitudinal members 61, 62 exceed the length L60 of the hollow region 60.

この構成によれば、一対の長手方向部材６１，６２と一対の長手方向側壁２１，２２の接触圧を均一にすることができる。さらに、この構成よれば、一対の長手方向部材６１，６２の長さＬ６１，Ｌ６２を確保して、嵩上げ部材６の装着溝２への固定力を強化することができる。 This configuration makes it possible to make the contact pressure between the pair of longitudinal members 61, 62 and the pair of longitudinal side walls 21, 22 uniform. Furthermore, this configuration ensures the lengths L61, L62 of the pair of longitudinal members 61, 62, and strengthens the fixing force of the bulkhead member 6 to the mounting groove 2.

また、本実施形態に係るタイヤ加硫金型１０においては、短手方向部材６３，６４の幅Ｗ６３，Ｗ６４は、長手方向部材６１，６２の幅Ｗ６１，Ｗ６２の２倍以上である、という構成である。 In addition, in the tire vulcanizing mold 10 according to this embodiment, the widths W63, W64 of the short-side members 63, 64 are at least twice the widths W61, W62 of the long-side members 61, 62.

この構成によれば、長手方向部材６１，６２に生ずるばね効果を短手方向部材６３，６４に比べ大きくすることができ、装着溝２に対する固定保持効果を得やすくなる。 With this configuration, the spring effect generated in the longitudinal members 61, 62 can be made greater than that of the transverse members 63, 64, making it easier to obtain a fixed holding effect in the mounting groove 2.

また、本実施形態に係るタイヤ加硫金型１０においては、短手方向部材６３，６４の短手方向ＷＤの中央部には、短手方向部材６３，６４の内縁６３ｂ，６４ｂから外縁６３ａ，６４ａへ向かって長手方向ＬＤに延びる切込み６７が形成される、という構成である。 In addition, in the tire vulcanization mold 10 according to this embodiment, a notch 67 is formed in the center of the short-side members 63, 64 in the short-side direction WD, and extends in the longitudinal direction LD from the inner edge 63b, 64b of the short-side members 63, 64 toward the outer edge 63a, 64a.

切込み６７を形成することで、切込み６７と一対の短手方向部材６３，６４の外縁６３ａ，６４ａとの間に幅狭領域６８が形成される。これにより、短手方向部材６３，６４が幅狭領域６８を支点として弾性変形しやすくなり、長手方向部材６１，６２のばね性を高めることができる。 By forming the notch 67, a narrow region 68 is formed between the notch 67 and the outer edges 63a, 64a of the pair of short-side members 63, 64. This makes it easier for the short-side members 63, 64 to elastically deform with the narrow region 68 as a fulcrum, thereby improving the springiness of the long-side members 61, 62.

また、本実施形態に係るタイヤ加硫金型１０においては、切込み６７と短手方向部材６３，６４の外縁６３ａ，６４ａにより形成される幅狭領域６８の幅Ｗ６８は、長手方向部材６１，６２の幅Ｗ６１，Ｗ６２より小さい、という構成である。 In addition, in the tire vulcanization mold 10 according to this embodiment, the width W68 of the narrow region 68 formed by the notch 67 and the outer edges 63a, 64a of the short-side members 63, 64 is smaller than the widths W61, W62 of the long-side members 61, 62.

この構成によれば、長手方向部材６１，６２に効果的にばね性を付与することができる。 This configuration effectively imparts spring properties to the longitudinal members 61 and 62.

また、本実施形態に係るタイヤ加硫金型１０においては、一対の長手方向部材６１，６２及び一対の長手方向側壁２１，２２は、タイヤ径方向外側に凸となる円弧状をなし、一対の長手方向部材６１，６２のうちタイヤ径方向外側の長手方向部材６１の曲率半径Ｒ６１は、一対の長手方向側壁２１，２２のうちタイヤ径方向外側の長手方向側壁２１の曲率半径Ｒ２１よりも小さく、かつ一対の長手方向部材６１，６２のうちタイヤ径方向内側の長手方向部材６２の曲率半径Ｒ６２は、一対の長手方向側壁２１，２２のうちタイヤ径方向内側の長手方向側壁２２の曲率半径Ｒ２２よりも大きい、という構成である。 In addition, in the tire vulcanization mold 10 according to this embodiment, the pair of longitudinal members 61, 62 and the pair of longitudinal side walls 21, 22 are arc-shaped and convex radially outward in the tire direction, and the radius of curvature R61 of the longitudinal member 61 on the outer side in the tire direction of the pair of longitudinal members 61, 62 is smaller than the radius of curvature R21 of the longitudinal side wall 21 on the outer side in the tire direction of the pair of longitudinal side walls 21, 22, and the radius of curvature R62 of the longitudinal member 62 on the inner side in the tire direction of the pair of longitudinal members 61, 62 is larger than the radius of curvature R22 of the longitudinal side wall 22 on the inner side in the tire direction of the pair of longitudinal side walls 21, 22.

この構成によれば、嵩上げ部材６は、装着溝２に装着される際、装着溝２の幅Ｗ２より小さい幅となるように長手方向部材６１と長手方向部材６２を互いに近付ける向きに圧縮された状態にて装着溝２に挿入される。すなわち、嵩上げ部材６は、装着溝２の一対の長手方向側壁２１，２２に加圧接触されて装着溝２へ装着される。 According to this configuration, when the bulking member 6 is attached to the mounting groove 2, it is inserted into the mounting groove 2 in a compressed state in which the longitudinal members 61 and 62 are brought closer to each other so that the width of the bulking member 6 is smaller than the width W2 of the mounting groove 2. In other words, the bulking member 6 is attached to the mounting groove 2 by being pressed into contact with a pair of longitudinal side walls 21, 22 of the mounting groove 2.

なお、タイヤ加硫金型１０は、上記した実施形態の構成に限定されるものではなく、また、上記した作用効果に限定されるものではない。また、タイヤ加硫金型１０は、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。例えば、上記した複数の実施形態の各構成や各方法等を任意に採用して組み合わせてもよく、さらに、下記する各種の変更例に係る構成や方法等を任意に一つ又は複数選択して、上記した実施形態に係る構成や方法等に採用してもよいことは勿論である。 The tire vulcanizing mold 10 is not limited to the configuration of the embodiment described above, nor is it limited to the above-mentioned effects. Furthermore, the tire vulcanizing mold 10 can of course be modified in various ways without departing from the spirit of the present invention. For example, the configurations and methods of the above-mentioned embodiments may be arbitrarily adopted and combined, and further, one or more of the configurations and methods of the various modified examples described below may be arbitrarily selected and adopted in the configurations and methods of the above-mentioned embodiments.

（１）上記実施形態に係るタイヤ加硫金型１０においては、装着溝２は、タイヤ周方向の長さがタイヤ径方向の長さよりも大きい長手形状をなし、嵩上げ部材６は、ばね性を有するように形成され、装着溝２の長手方向ＬＤに延びる一対の長手方向側壁２１，２２へ加圧接触されて装着溝２へ装着される、という構成である。しかしながら、タイヤ加硫金型１０は、かかる構成に限られない。例えば、嵩上げ部材６は、一対の長手方向側壁２１，２２へ加圧接触されることなく装着溝２へ装着され、ねじ４で固定されてもよい。 (1) In the tire vulcanizing mold 10 according to the above embodiment, the mounting groove 2 has a longitudinal shape in which the length in the tire circumferential direction is greater than the length in the tire radial direction, and the bulking member 6 is formed to have spring properties and is mounted in the mounting groove 2 by being pressed into contact with a pair of longitudinal side walls 21, 22 extending in the longitudinal direction LD of the mounting groove 2. However, the tire vulcanizing mold 10 is not limited to such a configuration. For example, the bulking member 6 may be mounted in the mounting groove 2 without being pressed into contact with the pair of longitudinal side walls 21, 22, and fixed with the screw 4.

（２）また、上記実施形態に係るタイヤ加硫金型１０においては、装着溝２の短手方向ＷＤの幅Ｗ２は、長手方向ＬＤに一定であり、嵩上げ部材６は、装着溝２の長手方向側壁２１，２２に接触する一対の長手方向部材６１，６２と、一対の長手方向部材６１，６２の端部同士を接続する一対の短手方向部材６３，６４と、を有し、長手方向部材６１，６２の幅Ｗ６１，Ｗ６２は一定であり、長手方向部材６１，６２の長さＬ６１，Ｌ６２は中空領域６０の長さＬ６０を超える、という構成である。しかしながら、タイヤ加硫金型１０は、かかる構成に限られない。例えば、上記実施形態の切欠き６９を形成せず、長手方向部材６１，６２の長さＬ６１，Ｌ６２を中空領域６０の長さＬ６０と同じとしてもよい。 (2) In addition, in the tire vulcanizing mold 10 according to the above embodiment, the width W2 in the short direction WD of the mounting groove 2 is constant in the longitudinal direction LD, the padding member 6 has a pair of longitudinal members 61, 62 that contact the longitudinal side walls 21, 22 of the mounting groove 2, and a pair of short members 63, 64 that connect the ends of the pair of longitudinal members 61, 62, the widths W61, W62 of the longitudinal members 61, 62 are constant, and the lengths L61, L62 of the longitudinal members 61, 62 exceed the length L60 of the hollow region 60. However, the tire vulcanizing mold 10 is not limited to such a configuration. For example, the notch 69 of the above embodiment may not be formed, and the lengths L61, L62 of the longitudinal members 61, 62 may be the same as the length L60 of the hollow region 60.

（３）また、上記実施形態に係るタイヤ加硫金型１０においては、短手方向部材６３，６４の幅Ｗ６３，Ｗ６４は、長手方向部材６１，６２の幅Ｗ６１，Ｗ６２の２倍以上である、という構成である。しかしながら、タイヤ加硫金型１０は、かかる構成に限られない。例えば、短手方向部材６３，６４の幅Ｗ６３，Ｗ６４は、長手方向部材６１，６２の幅Ｗ６１，Ｗ６２と同じであってもよい。 (3) In addition, in the tire vulcanizing mold 10 according to the above embodiment, the widths W63, W64 of the short-side members 63, 64 are at least twice the widths W61, W62 of the long-side members 61, 62. However, the tire vulcanizing mold 10 is not limited to this configuration. For example, the widths W63, W64 of the short-side members 63, 64 may be the same as the widths W61, W62 of the long-side members 61, 62.

（４）また、上記本実施形態に係るタイヤ加硫金型１０においては、短手方向部材６３，６４の短手方向ＷＤの中央部には、短手方向部材６３，６４の内縁６３ｂ，６４ｂから外縁６３ａ，６４ａへ向かって長手方向ＬＤに延びる切込み６７が形成される、という構成である。しかしながら、タイヤ加硫金型１０は、かかる構成に限られない。例えば、切込み６７を設けることなく、短手方向部材６３，６４の幅Ｗ６３，Ｗ６４自体を狭くしてもよい。 (4) In addition, in the tire vulcanizing mold 10 according to the present embodiment, a notch 67 is formed in the center of the short-side direction WD of the short-side members 63, 64, extending in the longitudinal direction LD from the inner edge 63b, 64b of the short-side members 63, 64 toward the outer edge 63a, 64a. However, the tire vulcanizing mold 10 is not limited to this configuration. For example, the widths W63, W64 of the short-side members 63, 64 themselves may be narrowed without providing the notch 67.

（５）また、上記実施形態に係るタイヤ加硫金型１０においては、切込み６７と短手方向部材６３，６４の外縁６３ａ，６４ａにより形成される幅狭領域６８の幅Ｗ６８は、長手方向部材６１，６２の幅Ｗ６１，Ｗ６２より小さい、という構成である。しかしながら、タイヤ加硫金型１０は、かかる構成に限られない。例えば、幅狭領域６８の幅Ｗ６８が、長手方向部材６１，６２の幅Ｗ６１，Ｗ６２と同じであってもよい。 (5) In addition, in the tire vulcanizing mold 10 according to the above embodiment, the width W68 of the narrow region 68 formed by the notch 67 and the outer edges 63a, 64a of the short-side members 63, 64 is smaller than the widths W61, W62 of the longitudinal members 61, 62. However, the tire vulcanizing mold 10 is not limited to this configuration. For example, the width W68 of the narrow region 68 may be the same as the widths W61, W62 of the longitudinal members 61, 62.

（６）また、上記本実施形態に係るタイヤ加硫金型１０においては、一対の長手方向部材６１，６２及び一対の長手方向側壁２１，２２は、タイヤ径方向外側に凸となる円弧状をなし、一対の長手方向部材６１，６２のうちタイヤ径方向外側の長手方向部材６１の曲率半径Ｒ６１は、一対の長手方向側壁２１，２２のうちタイヤ径方向外側の長手方向側壁２１の曲率半径Ｒ２１よりも小さく、かつ一対の長手方向部材６１，６２のうちタイヤ径方向内側の長手方向部材６２の曲率半径Ｒ６２は、一対の長手方向側壁２１，２２のうちタイヤ径方向内側の長手方向側壁２２の曲率半径Ｒ２２よりも大きい、という構成である。しかしながら、タイヤ加硫金型１０は、かかる構成に限られない。例えば、平面視において、装着溝２の一対の長手方向側壁２１，２２を直線状とし、嵩上げ部材６の一対の長手方向部材６１，６２をタイヤ径方向外側に凸となるように湾曲させてもよい。さらに、平面視において、装着溝２の一対の長手方向側壁２１，２２を直線状とし、嵩上げ部材６の一対の長手方向部材６１，６２を互いにタイヤ径方向（短手方向ＷＤ）の反対側に凸となるように湾曲させてもよい。これらの形態であっても、嵩上げ部材６の一対の長手方向部材６１，６２が、装着溝２の一対の長手方向側壁２１，２２へ加圧接触された状態で、嵩上げ部材６を装着溝２へ装着することができる。 (6) In addition, in the tire vulcanizing mold 10 according to the present embodiment, the pair of longitudinal members 61, 62 and the pair of longitudinal side walls 21, 22 are arc-shaped and convex toward the tire radial outside, and the radius of curvature R61 of the longitudinal member 61 on the outer side in the tire radial direction of the pair of longitudinal members 61, 62 is smaller than the radius of curvature R21 of the longitudinal side wall 21 on the outer side in the tire radial direction of the pair of longitudinal side walls 21, 22, and the radius of curvature R62 of the longitudinal member 62 on the inner side in the tire radial direction of the pair of longitudinal members 61, 62 is larger than the radius of curvature R22 of the longitudinal side wall 22 on the inner side in the tire radial direction of the pair of longitudinal side walls 21, 22. However, the tire vulcanizing mold 10 is not limited to such a configuration. For example, in a plan view, the pair of longitudinal side walls 21, 22 of the mounting groove 2 may be straight, and the pair of longitudinal members 61, 62 of the raising member 6 may be curved so as to be convex toward the tire radial outside. Furthermore, in a plan view, the pair of longitudinal side walls 21, 22 of the mounting groove 2 may be straight, and the pair of longitudinal members 61, 62 of the raising member 6 may be curved so as to be convex toward opposite sides of the tire radial direction (short direction WD). Even in these forms, the raising member 6 can be mounted in the mounting groove 2 with the pair of longitudinal members 61, 62 of the raising member 6 in pressure contact with the pair of longitudinal side walls 21, 22 of the mounting groove 2.

１…タイヤ成型面、２…装着溝、３…薄板、４…ねじ（締結部材）、５…凹凸形成部、６…嵩上げ部材、１０…タイヤ加硫金型、２０…底面、２１…第１長手方向側壁、２２…第２長手方向側壁、２３…第１短手方向側壁、２４…第２短手方向側壁、３６…凸部（凸状膨出部）、３６ａ…先端、６０…中空領域、６１…第１長手方向部材、６２…第２長手方向部材、６３…第１短手方向部材、６３ａ…外縁、６３ｂ…内縁、６４…第２短手方向部材、６４ａ…外縁、６４ｂ…内縁、６７…切込み、６８…幅狭領域、６９…切欠き、Ｒ２１…第１長手方向側壁の曲率半径、Ｒ２２…第２長手方向側壁の曲率半径、Ｒ６１…第１長手方向部材の曲率半径、Ｒ６２…第２長手方向部材の曲率半径、ＬＤ…長手方向、ＷＤ…短手方向 1... tire molding surface, 2... mounting groove, 3... thin plate, 4... screw (fastening member), 5... unevenness forming portion, 6... raising member, 10... tire vulcanization mold, 20... bottom surface, 21... first longitudinal side wall, 22... second longitudinal side wall, 23... first lateral side wall, 24... second lateral side wall, 36... convex portion (convex bulge portion), 36a... tip, 60... hollow region, 61... first longitudinal member, 62... second longitudinal member , 63...first short-side member, 63a...outer edge, 63b...inner edge, 64...second short-side member, 64a...outer edge, 64b...inner edge, 67...notch, 68...narrow region, 69...notch, R21...radius of curvature of first longitudinal side wall, R22...radius of curvature of second longitudinal side wall, R61...radius of curvature of first longitudinal member, R62...radius of curvature of second longitudinal member, LD...longitudinal direction, WD...short-side direction

Claims (7)

タイヤの外表面に標識又は模様を転写形成するための薄板と、
前記薄板が装着される装着溝と、
前記薄板と前記装着溝の底面との間に配置される嵩上げ部材と、
前記薄板と前記嵩上げ部材を前記装着溝へ固定するための締結部材と、を備え、
前記薄板は、前記装着溝の底面へ向かって突出する凸状膨出部を有し、
前記嵩上げ部材は、前記薄板の縁に沿って配置され、前記凸状膨出部を取り巻く中空領域を有する、タイヤ加硫金型。 A thin plate for transferring a mark or pattern onto an outer surface of a tire;
a mounting groove in which the thin plate is mounted;
a raising member disposed between the thin plate and a bottom surface of the mounting groove;
a fastening member for fixing the thin plate and the raising member to the mounting groove,
the thin plate has a convex bulge that protrudes toward a bottom surface of the mounting groove,
The tire vulcanizing mold, wherein the raising member is arranged along the edge of the thin plate and has a hollow area surrounding the convex bulge portion. 前記装着溝は、タイヤ周方向の長さがタイヤ径方向の長さよりも大きい長手形状をなし、
前記嵩上げ部材は、ばね性を有するように形成され、前記装着溝の長手方向に延びる一対の長手方向側壁へ加圧接触されて前記装着溝へ装着される、請求項１に記載のタイヤ硫金型。 The mounting groove has a longitudinal shape in which the length in the tire circumferential direction is greater than the length in the tire radial direction,
2. The tire vulcanization mold according to claim 1, wherein the raising member is formed to have a spring property and is attached to the mounting groove by being pressed into contact with a pair of longitudinal side walls extending in the longitudinal direction of the mounting groove. 前記装着溝の短手方向の幅は、前記長手方向に一定であり、
前記嵩上げ部材は、前記装着溝の長手方向側壁に接触する一対の長手方向部材と、前記一対の長手方向部材の端部同士を接続する一対の短手方向部材と、を有し、
前記長手方向部材の幅は一定であり、前記長手方向部材の長さは前記中空領域の前記長手方向の長さを超える、請求項２に記載のタイヤ加硫金型。 The width of the mounting groove in the short side direction is constant in the long side direction,
the raising member includes a pair of longitudinal members contacting longitudinal side walls of the mounting groove, and a pair of lateral members connecting ends of the pair of longitudinal members to each other,
3. The tire curing mold according to claim 2, wherein the width of the longitudinal members is constant and the length of the longitudinal members exceeds the longitudinal length of the hollow region. 前記短手方向部材の幅は、前記長手方向部材の幅の２倍以上である、請求項３に記載のタイヤ加硫金型。 The tire vulcanization mold according to claim 3, wherein the width of the short-side member is at least twice the width of the long-side member. 前記短手方向部材の前記短手方向の中央部には、前記短手方向部材の内縁から外縁へ向かって前記長手方向に延びる切込みが形成される、請求項３又は４に記載のタイヤ加硫金型。 The tire vulcanization mold according to claim 3 or 4, wherein a notch is formed in the center of the short side of the short side member, the notch extending in the longitudinal direction from the inner edge to the outer edge of the short side member. 前記切込みと前記短手方向部材の外縁により形成される幅狭領域の幅は、前記長手方向部材の幅より小さい、請求項５に記載のタイヤ加硫金型。 The tire vulcanization mold according to claim 5, wherein the width of the narrow region formed by the incision and the outer edge of the short-side member is smaller than the width of the long-side member. 前記一対の長手方向部材及び前記一対の長手方向側壁は、タイヤ径方向外側に凸となる円弧状をなし、
前記一対の長手方向部材のうちタイヤ径方向外側の長手方向部材の曲率半径は、前記一対の長手方向側壁のうちタイヤ径方向外側の長手方向側壁の曲率半径よりも小さく、かつ前記一対の長手方向部材のうちタイヤ径方向内側の長手方向部材の曲率半径は、前記一対の長手方向側壁のうちタイヤ径方向内側の長手方向側壁の曲率半径よりも大きい、請求項３～６の何れか１項に記載のタイヤ加硫金型。



 The pair of longitudinal direction members and the pair of longitudinal direction side walls are formed into an arc shape that is convex outward in the tire radial direction,
The tire vulcanizing mold according to any one of claims 3 to 6, wherein a radius of curvature of the longitudinal member on an outer side in the tire radial direction of the pair of longitudinal members is smaller than a radius of curvature of the longitudinal side wall on an outer side in the tire radial direction of the pair of longitudinal sidewalls, and a radius of curvature of the longitudinal member on an inner side in the tire radial direction of the pair of longitudinal members is larger than a radius of curvature of the longitudinal side wall on an inner side in the tire radial direction of the pair of longitudinal sidewalls.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4126838B2 (en) 2000-03-07 2008-07-30 不二製油株式会社 Manufacturing method of confectionery with excellent heat resistance
JP2011031519A (en) 2009-08-03 2011-02-17 Bridgestone Corp Mold for vulcanization
JP2014133402A (en) 2012-12-11 2014-07-24 Kintsune Seiki Co Ltd Tire stencil production apparatus
JP2014172360A (en) 2013-03-12 2014-09-22 Sumitomo Rubber Ind Ltd Tire production method and pneumatic tire
JP2017109441A (en) 2015-12-18 2017-06-22 東洋ゴム工業株式会社 Mold for vulcanizing and molding tire
JP2017154282A (en) 2016-02-29 2017-09-07 横浜ゴム株式会社 Tire marker-stamping plate and tire production method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4126838B2 (en) 2000-03-07 2008-07-30 不二製油株式会社 Manufacturing method of confectionery with excellent heat resistance
JP2011031519A (en) 2009-08-03 2011-02-17 Bridgestone Corp Mold for vulcanization
JP2014133402A (en) 2012-12-11 2014-07-24 Kintsune Seiki Co Ltd Tire stencil production apparatus
JP2014172360A (en) 2013-03-12 2014-09-22 Sumitomo Rubber Ind Ltd Tire production method and pneumatic tire
JP2017109441A (en) 2015-12-18 2017-06-22 東洋ゴム工業株式会社 Mold for vulcanizing and molding tire
JP2017154282A (en) 2016-02-29 2017-09-07 横浜ゴム株式会社 Tire marker-stamping plate and tire production method

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