JP2006212919A - Tire molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire molding machine which can support the side part of a tire-shaped member obtained by molding a cylindrical member comprising a band member and a bead member toroidally over the entire circumference from the inside in the width direction and can carry out work for attaching the cylindrical member and work for detaching the tire-shaped member. <P>SOLUTION: Contact plates 35b and 36b arranged to approach each other in the circumferential direction are contacted with the inside in the width direction of the side part of the band member BA molded toroidally, and the side part of the band member BA is supported over the entire circumference from the inside in the width direction of the band member BA. Contact members 35 and 36 are inclined to the inside in the width direction of the band member BA so that the position in the inclination direction of the first contact member 35 and the position in the inclination direction of the second contact member 36 are dislocated from each other. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tire molding machine that forms a tire-like member by expanding a cylindrical member composed of a band member and a pair of bead members into a toroidal shape, for example, in a manufacturing process of an automobile tire.

  In general, when this type of tire is manufactured, an unvulcanized tire composed of a plurality of types of rubber members is molded, and the unvulcanized tire is vulcanized and molded in a vulcanization mold. When molding an unvulcanized tire, first, a sheet-like member such as an inner liner member, a sidewall member, or a carcass member is laminated to form a cylindrical band member, and a sheet-like member such as a belt member or a tread member. The members are stacked to form a cylindrical belt member. Next, a pair of bead members are attached to both ends of the band member in the width direction, and each bead member is held from the inner peripheral surface side of the band member by a pair of bead lock mechanisms, and the band member is radially compressed by compressed air. The tire-like member is formed by moving each bead lock mechanism in a direction of approaching each other while inflating. At that time, a belt member is disposed outside the tire-like member, and the tire-like member and the belt member are assembled with each other by pressing the outer peripheral surface of the tire-like member against the inner peripheral surface of the belt member. Sulfur tires are formed.

  Thus, as a tire molding machine for molding a tire-shaped member, a pair of bead lock mechanisms similar to those described above, and provided on both sides in the axial direction of each bead lock mechanism, both end portions in the width direction of the band member are inward in the width direction. And a pair of side bladders that can be folded back toward each other, and the folded portions at both ends in the width direction of the band member are pressure-bonded to the side surface portions of the tire-like member (for example, see Patent Document 1). .)

  By the way, in the molding machine, since air is likely to be interposed between the side surface portion and the folded portion of the tire-like member, the folded portion is pressed to the side surface portion side of the tire-like member by the stitcher roller over the entire circumference. I try to remove it. At this time, since it is only the internal pressure by the compressed air that supports the side surface portion of the tire-like member from the inner side in the width direction, the pressing force by the stitcher roller becomes insufficient, and between the side portion of the tire-like member and the folded portion. There was a problem that it was difficult for air to escape.

On the other hand, in order to improve this problem, a pair of bead lock mechanisms and a pair of side bladders similar to those described above, and a pair of side surface support mechanisms that respectively support the side surfaces on both sides in the width direction of the tire-like member from the inside in the width direction. A plurality of contact members arranged at intervals in the circumferential direction of the tire-like member, and a tilting mechanism for tilting each contact member in the width direction of the tire-like member. The tilting mechanism simultaneously tilts each abutting member toward the outer side in the width direction of the tire-like member, thereby bringing each abutting member into contact with the side surface portion of the tire-like member from the inner side in the width direction, It is known that each contact member is tilted simultaneously toward the inner side in the width direction of the tire-like member to move each contact member radially inward from the inner peripheral surface of the tire-like member. Have (E.g., see Patent Document 2.).
Japanese Patent Publication No. 6-35161 JP-A-4-29835

  However, in the latter molding machine, the contact members are arranged at intervals in the circumferential direction of the tire-like member. There is a problem in that it cannot be supported over the entire area, the pressing force of the unsupported portion by the stitcher roller becomes weak, and air bleeding becomes insufficient.

  Further, in order to support the side surface portion of the tire-like member over the entire circumference from the inner side in the width direction, the contact members are formed so as to be close to each other in the circumferential direction in a state of being in contact with the side surface portion of the tire-like member. When the abutting members are tilted inward in the width direction, the abutting members are in contact with each other in the circumferential direction, and the abutting members are moved radially inward from the inner peripheral surface of the tire-like member. become unable. For this reason, there has been a problem in that it is impossible to mount a cylindrical member composed of a band member and a bead member on each bead lock mechanism or to remove a tire-shaped member.

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to form a side surface portion of a tire-like member formed by forming a cylindrical member composed of a band member and a bead member into a toroidal shape in the width direction. An object of the present invention is to provide a tire molding machine that can be supported from the inside over the entire circumference, and that can easily perform mounting work of a cylindrical member and removal work of a tire-like member.

  In order to achieve the above object, the present invention includes a pair of holding members capable of holding one end side and the other end side in the width direction of a cylindrical member composed of a band member and a pair of bead members, and holds the cylindrical member. In the tire molding machine for forming the tire-shaped member by expanding the cylindrical member in a toroidal shape while moving the holding members so as to approach each other in the width direction of the cylindrical member, one end side in the width direction of the tire-shaped member And a pair of side surface support mechanisms that can respectively support the side surface portion on the other end side from the inner side in the width direction over the entire circumference, and each side surface support mechanism is attached to the side surface portion of the tire shape member with respect to each other. A plurality of contact members that can contact each other from the inside in the width direction in a state of being arranged so as to be close to each other in the direction, and each contact member is tilted toward the outside in the width direction of the tire-like member to On the side of the tire-like member Each contact member that is in contact with the tire-like member is tilted toward the inner side in the width direction of the tire-like member so that the positions of the contact members adjacent to each other in the circumferential direction are shifted from each other. And a tilt mechanism that moves each contact member to a predetermined standby position radially inward of the inner peripheral surface of the tire-like member.

  Thereby, since each contact member is arranged so that it may adjoin to the peripheral direction of a tire-like member, and contacts the side part of a tire-like member, the side part of a tire-like member is covered over the perimeter from the width direction inner side. Can be supported. Further, when the respective contact members are tilted inward in the width direction of the tire-like member, the positions of the contact members adjacent to each other in the circumferential direction are shifted from each other. It tilts toward the inner side in the width direction of the tire-like member without contacting the tire.

  According to the present invention, since the side surface portion of the tire-like member can be supported over the entire circumference from the inner side in the width direction, for example, when air bleeding is performed on the side surface portion of the tire-like member by a stitcher roller, The pressing force of the stitcher roller is uniformly applied to the side surface over the entire circumference, and the air bleeding of the side surface of the tire-like member can be reliably performed. In addition, since each contact member tilts toward the inner side in the width direction of the tire-like member without contacting each other in the circumferential direction of the tire-like member, each contact member can be smoothly moved to a predetermined standby position. The attaching operation of the cylindrical member to each holding member and the removing operation of the tire-like member can be easily performed.

  1 to 9 show an embodiment of the present invention. FIG. 1 is a side sectional view of a tire molding machine showing a state where a band member is formed in a toroidal shape, and FIG. 2 is a sectional view taken along line AA in FIG. 3 is a side sectional view of the tire molding machine showing a state in which the band member is disposed on the outer peripheral surface side of each holding member, FIG. 4 is a sectional view taken along line BB in FIG. 3, and FIG. 5 is a supporting member in FIG. FIG. 6 is a side cross-sectional view of the main part showing a state where the first contact member is in contact with the band member formed in a toroidal shape, and FIG. 7 is a second view of the band member formed in the toroidal shape. FIG. 8 is a side sectional view of an essential part showing a state where the contact member is in contact, FIG. 8 is a side sectional view of an essential part showing a state in which the second contact member is moved to a predetermined standby position, and FIG. FIG.

  The tire molding machine of the present embodiment includes a spindle 1 that is rotated by a servo motor (not shown), and a pair of bead members BE that are attached to the spindle 1 and attached to the outer peripheral surfaces on both ends in the width direction of the band member BA. A pair of holding members 10 that can be respectively held, a bladder 20 that expands a band member BA held by each holding member 10 radially outward to form a toroidal shape, and is held by each holding member 10 to form a toroidal shape. A pair of side surface support mechanisms 30 capable of respectively supporting the side surface portions on both ends in the width direction of the formed band member BA (tire-like member) from the inner side in the width direction are provided.

  The support shaft 1 is formed of a cylindrical member, and a ball screw 2 rotated by a servo motor (not shown) is inserted in the support shaft 1 in the axial direction. A right screw is formed on the outer peripheral surface on one end side of the ball screw 2, and a left screw is formed on the outer peripheral surface on the other end side of the ball screw 2. Furthermore, the outer peripheral surface of the support shaft 1 is provided with two long holes 1 a spaced apart from each other in the axial direction, and each long hole 1 a is formed to extend in the axial direction of the support shaft 1.

  Each holding member 10 is attached to the support shaft 1 so as to be movable in the axial direction, and an engagement portion 10 a that engages each elongated hole 1 a in the circumferential direction of the support shaft 1 is provided on the inner peripheral surface side of each holding member 10. Is provided. Each engaging portion 10a is screwed into the ball screw 2, and the holding member 10 is moved by an equal distance in different directions by the rotation of the ball screw 2.

  Each holding member 10 further includes a bead lock mechanism 11 that holds the bead member BE from the inner peripheral surface side of the band member BA, and a band member BA that is outside the width direction of the bead member BE held by the bead lock mechanism 11. A side bladder 12 that is folded back inward in the width direction, and a holding member main body 13 that supports the bead lock mechanism 11 and the side bladder 12 are provided.

  The bead lock mechanism 11 includes a plurality of bead lock members 11a arranged in the circumferential direction on the outer peripheral surface side of the holding member main body 13, and a plurality of connections each having one end connected to the inner peripheral surface side of each bead lock member 11a. A member 11b and a plurality of pistons 11c connected to the other end of each connecting member 11b and moving in the holding member main body 13 in the width direction of the band member BA are provided.

  Each bead lock member 11a has a concave central portion in the width direction of the outer peripheral surface, and is supported by the holding member main body 13 so as to be movable in the radial direction.

  One end of each connecting member 11b is connected to the inner peripheral surface side of each bead lock member 11a so as to be tiltable in the width direction of the band member BA, and the other end of each connecting member 11b is connected to each piston 11c with the width of the band member BA. It is connected so that it can tilt in the direction.

  Each piston 11c consists of a member formed in a columnar shape, and moves in the width direction of the band member BA in a cylinder 13a formed in the holding member body 13 by compressed air supplied from a compressor (not shown). .

  The side bladder 12 is formed of a flexible member and is expanded radially outward by compressed air supplied from a compressor (not shown).

  The bladder 20 is formed of a flexible member, expands radially outward by compressed air supplied from a compressor (not shown), and expands the band member BA radially outward to form a predetermined toroidal shape. ing. Further, both end portions in the width direction are respectively supported by the engaging members 32 of the side surface support mechanism 30 described later. A plurality of reinforcing cords 20a as outer peripheral holding members are provided to extend in the circumferential direction of the bladder 20 on the outer peripheral portion of the bladder 20 that comes into contact with the outer peripheral portion of the band member BA formed in a toroidal shape from the radially inner side. The reinforcing cords 20a are arranged so as to be aligned in the width direction of the bladder 20. Here, each reinforcement cord 20a consists of metal materials, such as well-known synthetic fibers, such as polyester and nylon, and iron.

  Each side surface support mechanism 30 is movable in the width direction of the band member BA on the support member 31 fixed to the support shaft 1 between the holding members 10 and the support shaft 1 between the holding member 10 and the support member 31. And a plurality of first contact members 35 and a plurality of second contact members 36 supported by the support shaft member 31 so as to be tiltable in the width direction of the band member BA. .

  The support member 31 is a member formed in a cylindrical shape, and is formed so that the central portion in the width direction of the inner peripheral surface extends radially inward and is fixed to the support shaft 1. The outer circumferential surface of the support member 31 is provided with a plurality of first cutout portions 31a spaced apart from each other in the circumferential direction, and a plurality of second cutout portions 31b spaced apart from each other in the circumferential direction. They are provided at both ends in the width direction. Moreover, the 1st notch part 31a and the 2nd notch part 31b are alternately provided in the circumferential direction. Further, as shown in FIG. 5, each first notch 31 a is formed such that the width dimension of the support member 31 on the side in the width direction is larger than the width dimension on the side in the width direction. The support member 31 is provided as a member common to each side surface support mechanism 30, and the notches 31 a and 31 b on one end side in the width direction of the support member 31 are used for one side surface support mechanism 30, and the other in the width direction and the like. The notch portions 31 a and 31 b on the end side are used for the other side surface portion support mechanism 30.

  The engaging member 32 is formed of a cylindrical member, and a flange portion 32a extending outward in the radial direction is provided at one end in the width direction located on the outer side in the width direction of the band member BA. In addition, a plurality of first engagement protrusions 33 are provided on the outer peripheral surface on the other end in the width direction at intervals in the circumferential direction, and a plurality of second engagement protrusions 34 are spaced from each other in the circumferential direction. Is provided. Each second engagement protrusion 34 is provided on the outer peripheral surface on the inner side in the width direction of the band member BA with respect to each first engagement protrusion 33, and each first engagement protrusion 33 and each second engagement protrusion 34 are circumferential. Alternatingly arranged in the direction. The engagement protrusions 33 and 34 are formed so as to extend outward in the radial direction. Engagement grooves 33a and 34a extending outward in the radial direction are provided on the distal ends of the engagement protrusions 33 and 34, respectively. ing. In addition, the flange portion 32a is provided with two cylinders 32b as adjustment mechanisms, which are well-known hydraulic cylinders spaced apart from each other in the circumferential direction, and the tip ends of the rods of the cylinders 32b are fixed to the holding member main body 13, respectively. ing. That is, the engaging member 32 moves on the support shaft 1 together with the holding member 10 in the width direction of the band member BA, and the cylinder 32b adjusts the interval between the engaging member 32 and the holding member 10 in the width direction of the band member BA. It is possible.

  Each first abutting member 35 has an arm member 35a constituting one end portion side thereof and an abutting plate 35b constituting the other end portion side. The contact plate 35b is formed in a shape obtained by dividing a hollow disk in the circumferential direction, and one end of the arm member 35a is fixed to one surface in the thickness direction of the contact plate 35b. The other surface in the thickness direction of each contact plate 35b is formed in a gently curved surface so as to follow the inner surface shape of the side surface portion of the band member BA formed in a toroidal shape.

  The arm member 35a of each first contact member 35 is inserted through each first cutout portion 31a and supported by the support member 31 so as to be tiltable in the width direction of the band member BA. The other end side of each arm member 35a is engaged with the engagement groove 33a of each first engagement protrusion 33 in the width direction of the band member BA. Furthermore, as shown in FIG. 5, when each first contact member 35 is tilted inward in the width direction of the band member BA, the contact plate 35b is arranged in the first notch 31a. .

  Each second contact member 36 has an arm member 36a that constitutes one end portion side thereof, and an abutment plate 36b that constitutes the other end portion side thereof. The contact plate 36b is formed in the same shape as the contact plate 35b, and one end of the arm member 36a is fixed to one surface in the thickness direction of the contact plate 36b. The arm member 36a is longer than the arm member 35a. Further, the other surface in the thickness direction of each contact plate 36b is formed in a gently curved surface so as to follow the inner surface shape of the side surface portion of the band member BA formed in a toroidal shape.

  The arm member 36a of each second contact member 36 is inserted into each second notch 31b and supported by the support member 31 so as to be tiltable in the width direction of the band member BA. The other end side of each arm member 36a is engaged with the engagement groove 34a of each second engagement protrusion 34 in the width direction of the band member BA.

  That is, by moving the holding member 10 toward the inner side in the width direction of the band member BA, one end side of each of the contact members 35 and 36 tilts toward the inner side in the width direction of the band member BA, and each contact member Each contact plate 35b, 36b on the other end side of 35, 36 tilts toward the outside in the width direction of the band member BA. Further, when the contact members 35 and 36 are tilted outward in the width direction of the band member BA, the contact plates 35b and 36b are arranged in a toroidal shape in a state where they are arranged close to each other in the circumferential direction of the band member BA. The band member BA is in contact with the side surface portion of the molded band member BA from the inner side in the width direction.

  Further, by moving the holding member 10 toward the outside in the width direction of the band member BA, one end side of each contact member 35, 36 tilts toward the outside in the width direction of the band member BA, and each contact member The respective contact plates 35b, 36b on the other end side of 35, 36 tilt toward the inner side in the width direction of the band member BA, and the respective contact members 35, 36 are radially inward from the inner peripheral surface of the band member BA. Each of them is moved to a predetermined standby position.

  At this time, since the arm member 36a of the second contact member 36 is formed longer than the arm member 35a of the first contact member 35, the support member 31 of the first contact member 35 is shown in FIG. The second distance from the support point 36c by the support member 31 of the second contact member 36 to the engagement point 36d by the engagement member 32 is larger than the first distance L1 from the support point 35c by the engagement member 32 to the engagement point 35d by the engagement member 32. L2 is longer. For this reason, as shown in FIGS. 6 to 9, in the state where the contact plates 35b and 36b of the contact members 35 and 36 are in contact with the band member BA, one end side of each contact member 35 and 36 is provided. Are moved to the outside in the width direction of the band member BA by the same moving distance L3 at the same speed, the tilting movement of each second abutting member 36 compared to a predetermined tilting speed at which each first abutting member 35 tilts. As the speed decreases, the angle at which each second contact member 36 tilts is smaller than each first contact member 35. That is, the contact members 35 and 36 are moved inward in the width direction of the band member BA so that the position of the first contact member 35 in the tilt direction and the position of the second contact member 36 in the tilt direction are shifted from each other. The first abutment member 35 and the second abutment member 36 can be tilted, and are disposed at different positions in the tilting direction at a predetermined standby position.

  When the band member BA is formed into a toroidal shape using the tire forming machine configured as described above, first, as shown in FIGS. 3 and 4, each holding member 10 is first moved outward in the width direction of the band member BA. A band member BA having a pair of bead members BE mounted on the outer peripheral surface side of each holding member 10 is disposed in a state where the contact members 35 and 36 are moved to a predetermined standby position. Next, each piston 11c is moved inward in the width direction of the band member BA, each bead lock member 11a is moved radially outward, and each bead member BE is moved to the inner peripheral surface of the band member BA by each bead lock member 11a. Hold from the side.

  Subsequently, as shown in FIG. 1 and FIG. 2, the band member BA is moved to the inner side in the width direction of the band member BA while the bladder 20 is expanded radially outward, so that the band member BA is formed in a toroidal shape. To form. At this time, the contact members 35 and 36 are tilted outward in the radial direction, and the contact plates 35b and 36b are formed on the side surfaces on both sides in the width direction of the band member BA formed in a toroidal shape over the entire circumference. Abut. Further, a belt member (not shown) is assembled to the outer peripheral surface of the band member BA.

  Next, by expanding each side bladder 12 radially outward, the band member BA on the outer side in the width direction than the bead member BE is folded back inward in the width direction. Here, the abutting plates 35b and 36b abut on the side surface of the band member BA formed in a toroidal shape from the inner side in the width direction so as to be close to each other in the circumferential direction, and the side surface portion is the band member. Since it supports over the perimeter from the width direction inner side of BA, a folding | returning part can be reliably crimped | bonded to the side part of band member BA.

  Subsequently, each side bladder 12 is contracted, and the folded portion is pressed to the side surface portion side of the band member BA by a well-known stitcher roller (not shown), so that the folded portion and the side surface portion of the band member BA are separated. Air vent between. At this time, the abutting plates 35b and 36b are in contact with the side surface of the band member BA from the inner side in the width direction so as to be close to each other in the circumferential direction. Since it is supported over the entire circumference from the inner side in the width direction, the pressing force by the stitcher roller can be applied uniformly over the entire circumference, and the air bleeding between the folded portion and the side surface portion of the band member BA is ensured. It can be carried out.

  Thereafter, the bladder 20 is contracted and each bead lock member 11a is moved inward in the radial direction, and each holding member 10 is moved outward in the width direction of the band member BA. By moving to the standby position, the band member BA molded in a toroidal shape can be removed from the tire molding machine.

  Here, when band members BA having different tire sizes, for example, band members BA having a large size in the width direction are formed in a toroidal shape, the distance between the holding member 10 and the engaging member 32 is set by the respective cylinders 32b. Keep them away in the width direction. That is, even if the interval between the holding members 10 when the band member BA is formed in a toroidal shape, the position of each engaging member 32 can be arbitrarily set in the width direction of the band member BA regardless of the interval between the holding members 10. Thus, the contact members 35 and 36 can be reliably brought into contact with the side surface of the band member BA.

  As described above, according to the present embodiment, the contact plates 35b and 36b are in contact with each other in the state of being arranged so as to be close to each other in the circumferential direction on the inner side in the width direction of the side surface portion of the band member BA formed in a toroidal shape. In contact with the side surface of the band member BA over the entire circumference from the inner side in the width direction of the band member BA, when performing air bleeding on the side surface of the band member BA formed in a toroidal shape by the stitcher roller, The pressing force of the stitcher roller can be applied evenly over the entire circumference, and air can be surely removed from the side surface of the band member BA.

  Further, the respective contact members 35 and 36 that are in contact with the side surface portion of the band member BA are arranged such that the position of each first contact member 35 in the tilt direction and the position of each second contact member 36 in the tilt direction are mutually. Since the band member BA is tilted inward in the width direction so as to be displaced, the first contact members 35 and the first contact members 35 that are arranged so as to be close to each other in the circumferential direction and are in contact with the side surface portion of the band member BA The two abutting members 36 can be tilted inward in the width direction of the band member BA without contacting each other in the circumferential direction of the band member BA. Therefore, each contact member 35, 36 can be smoothly moved to a predetermined standby position radially inward from the inner circumferential surface of the band member BA, and the band member BA can be easily attached to and detached from each holding member 10. It can be carried out.

  Further, when the respective contact members 35, 36 that are in contact with the band member BA are tilted inward in the width direction of the band member BA, the second contact member 36 has a speed that is greater than the tilting speed of each first contact member 35. Since the tilting speed is slowed, the contact members 35, 36 are banded so that the position of the first contact member 35 in the tilt direction and the position of the second contact member 36 in the tilt direction are shifted from each other. The member BA can be tilted inward in the width direction.

  Furthermore, each contact member 35, 36 is supported by the support member 31 so as to be tiltable in the width direction of the band member BA, and one end side of each contact member 35, 36 together with the holding member 10 in the width direction of the band member BA. By engaging the engagement member 32 moving in the width direction of the band member BA and moving the holding member 10 inward in the width direction of the band member BA, the contact plates 35b and 36b are moved to the width of the band member BA. Since the respective abutment plates 35b and 36b are inclined toward the inner side in the width direction of the band member BA by tilting toward the outer side in the direction and moving the holding member 10 toward the inner side in the width direction of the band member BA. The contact members 35 and 36 can be tilted without separately providing a drive mechanism for tilting the contact members 35 and 36, thereby simplifying the apparatus and reducing the manufacturing cost. It is extremely advantageous in achieving.

  Further, from the support point 36c by the support member 31 of the second contact member 36 rather than the first distance L1 from the support point 35c by the support member 31 of each first contact member 35 to the engagement point 35d by the engagement member 32. By increasing the second distance L2 to the engagement point 36d by the engagement member 32, the tilting speed of each second contact member 36 is made slower than each first contact member 35. The contact members 35 and 36 can be reliably tilted at different tilting speeds. Furthermore, each contact member 35, 36 can be tilted at different tilt speeds without separately providing a dedicated drive mechanism for tilting each contact member 35, 36. This is extremely advantageous in reducing the manufacturing cost.

  Further, since the distance between the holding member 10 and the engaging member 32 can be adjusted in the width direction of the band member BA by each cylinder 32b, each band member BA having a different size in the width direction is formed in a toroidal shape. Even when the distance between the holding members 10 changes, the position of each engagement member 32 can be arbitrarily adjusted in the width direction of the band member BA, and the abutting members 35 and 36 can be reliably connected to the side surface portion of the band member BA. It can be made to contact.

  Further, since the bladder 20 is provided between the holding members 10 to expand the band member BA radially outward to form a predetermined toroidal shape, the thickness variation of each component constituting the band member BA and each component The band member BA can always be formed into a predetermined toroidal shape regardless of the state of bonding between them.

  In addition, since the outer peripheral portion of the bladder 20 that is in contact with the outer peripheral portion of the band member BA formed in a toroidal shape from the radially inner side is reinforced by the plurality of reinforcing cords 20a, the outer peripheral portion of the bladder 20 is outside the predetermined outer diameter. Even when a tire having a low flatness ratio in which the tire thickness dimension is smaller than the tire width dimension is formed in a toroidal shape, the outer peripheral portion of the band member BA can always be formed into a predetermined shape. it can. Further, since the side surface portion of the band member BA is supported over the entire circumference by the contact members 35 and 36, the side surface portion can be always formed into a predetermined shape together with the outer peripheral portion of the band member BA.

  In the present embodiment, as the outer peripheral holding member that restricts the expansion of the outer peripheral portion of the band member BA, a plurality of reinforcing cords 20a are provided so as to extend in the circumferential direction of the bladder 20. The reinforcing cord 20a and a plurality of other reinforcing cords arranged so as to be aligned in the circumferential direction of the bladder 20 and extending in the width direction of the bladder 20 can also be configured. Moreover, it is also possible to use a cloth material instead of the reinforcing cord 20a.

  In the present embodiment, the tilting speed of each first abutting member 35 and the tilting speed of each second abutting member 36 are set to be different from each other. The contact members 35 and 36 that are in contact with the band member BA are tilted inward in the width direction of the band member BA so that the position and the position of the second contact member 36 in the tilt direction are shifted from each other. As shown in FIGS. 10 to 12, after the first abutting member 40 that is in contact with the band member BA starts to tilt inward in the width direction of the band member BA, the band member By starting the inward tilting of the band member BA in the width direction of each of the second abutting members 41 in contact with the BA, the tilting speeds of the respective abutting members 40 and 41 are not set to different speeds. Position of each first contact member 40 in the tilt direction It can be the position of the tilting direction of the second abutment member 41 to move the respective contact members 40, 41 to a predetermined standby position to be shifted from each other.

  Specifically, the contact members 40 and 41 are formed in the same shape as the first contact member 35 including the arm members 40a and 41a and the contact plates 40b and 41b, and the second contact member 41 includes An extending groove 42b extending in the width direction of the band member BA is provided in the engaging groove 42a of the second engaging protrusion 42 to be engaged. The extension groove 42b is formed so that when the holding member 10 moves inward in the width direction of the band member BA after the second contact member 41 contacts the band member BA, the second contact member 41 contacts the band member BA. The holding member 10 is formed so as to allow movement in the width direction while holding the contact. Further, the second engagement protrusion 42 is provided on the engagement member 32 so as to be located on the inner side in the width direction of the band member BA with respect to the first engagement protrusion 33.

  Thus, in a state where the contact members 40 and 41 are in contact with the band member BA, one end portion side of the first contact member 40 is engaged with the engagement groove 33a of the first engagement protrusion 33, and Since one end of the two abutting members 41 is engaged with the extending groove 42b of the second engaging protrusion 42, each first abutting member 40 is moved when the holding member 10 is moved outward in the width direction of the band member BA. The tilting of each second abutting member 41 can be started after starting the tilting.

  Furthermore, the tilting speed of each second contact member 41 can be made slower than the tilting speed of each first contact member 40.

Side surface sectional drawing of the tire molding machine which shows the state which shape | molded the band member which shows one Embodiment in this invention in the toroidal shape AA line sectional view in FIG. Side surface sectional view of the tire molding machine showing a state in which the band member is arranged on the outer peripheral surface side of each holding member BB sectional view in FIG. C direction arrow view of the support member in FIG. Side sectional view of the main part showing a state in which the first contact member is in contact with the band member formed in a toroidal shape. Side sectional view of the main part showing a state in which the second contact member is in contact with the band member formed in a toroidal shape. Side sectional view of the main part showing a state in which the second contact member has been moved to a predetermined standby position Operation explanatory diagram of each contact member The principal part side surface sectional view showing the state where the 1st contact member contacted the band member formed in the toroidal shape in the modification of each contact member of this embodiment The principal part side surface sectional view showing the state where the 2nd contact member contacted the band member formed in the toroidal shape in the modification of each contact member of this embodiment The principal part side surface sectional view showing the state where the 2nd contact member was moved to the predetermined standby position in the modification of each contact member of this embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Support shaft, 1a ... Long hole, 2 ... Ball screw, 10 ... Holding member, 10a ... Engagement part, 11 ... Bead lock mechanism, 11a ... Bead lock member, 12 ... Side bladder, 13 ... Holding member main body, 20 ... Bladder 20a ... reinforcing cord, 30 ... side support mechanism, 31 ... support member, 31a ... first notch, 31b ... second notch, 32 ... engaging member, 32b ... cylinder, 33 ... first engaging protrusion, 33a ... engagement groove 34 ... second engagement protrusion 34a ... engagement groove 35 ... first contact member 35a ... arm member 35b ... contact plate 35c ... support point 35d ... engagement point 36 ... second contact member, 36a ... arm member, 36b ... contact plate, 36c ... support point, 36d ... engagement point, 40 ... first contact member, 41 ... second contact member, 42 ... second engagement Projection, 42a ... engagement groove, 42b ... extension groove.

Claims (8)

A cylindrical member composed of a band member and a pair of bead members is provided with a pair of holding members capable of holding one end side and the other end side in the width direction, and the holding members holding the cylindrical members are mutually connected to the width of the cylindrical member. In a tire molding machine that forms a tire-shaped member by expanding a cylindrical member in a toroidal shape while moving so as to approach the direction,
A pair of side surface support mechanisms capable of supporting the side surface portions on the one end side and the other end side of the tire-shaped member from the inner side in the width direction over the entire circumference,
A plurality of abutting members capable of abutting from the inner side in the width direction in a state where the side surface support mechanisms are arranged on the side surface of the tire-like member so as to be close to each other in the circumferential direction of the tire-like member, The members are tilted toward the outer side in the width direction of the tire-like member so that the respective contact members are brought into contact with the side surfaces of the tire-like member, and the respective contact members that are in contact with the tire-like member are adjacent in the circumferential direction. The contact members are tilted toward the inner side in the width direction of the tire-like member so that the positions of the corresponding contact members in the tilt direction are shifted from each other, and the respective contact members are set at predetermined standby positions radially inward from the inner peripheral surface of the tire-like member. A tire molding machine characterized by comprising a tilting mechanism for moving each. The tilting mechanism tilts a part of the abutting members arranged at a predetermined number among the abutting members abutting on the tire-like member toward the inner side in the width direction of the tire-like member at a predetermined tilting speed. The tire molding machine according to claim 1, wherein the other contact member is tilted toward the inner side in the width direction of the tire-like member at another predetermined tilting speed. After the tilting mechanism starts tilting inward in the width direction of the tire-shaped members of some of the contact members arranged at a predetermined number of the contact members that are in contact with the tire-shaped member, the other The tire molding machine according to claim 1, wherein the tire-forming member is configured to start tilting inward in the width direction of the tire-like member. A support member that supports each abutment member so as to be able to tilt in the width direction of the tire-like member, and is engaged with one end of each abutment member in the width direction of the tire-like member and is held by the tilt mechanism. An engagement member that moves in the width direction of the tire-like member together with the member;
By moving the holding member toward the inner side in the width direction of the tire-like member with respect to the support member, the other end side of each contact member is tilted toward the outer side in the width direction of the tire-like member, and the holding member is The other end side of each contact member is tilted toward the inner side in the width direction of the tire-like member by moving toward the outer side in the width direction of the tire-like member with respect to the support member. The tire molding machine according to claim 1, 2, or 3. By setting the distance between the support point of the contact member by the support member of the contact member and the engagement point with the engagement member to a different distance between the contact members adjacent to each other, the adjacent contact members are different. The tire forming machine according to claim 4, wherein the tire forming machine is configured to tilt at a tilting speed. The tire molding machine according to claim 4 or 5, further comprising an adjustment mechanism capable of adjusting a distance between the engagement member and the holding member in a width direction of the tire-like member. A bladder provided between the holding members and capable of forming the cylindrical member into a predetermined toroidal shape by expanding toward the radially outer side of the cylindrical member. The tire molding machine according to 3, 4, 5 or 6. The tire molding machine according to claim 7, wherein an outer peripheral holding member that holds an outer peripheral portion of the bladder at a predetermined outer diameter is provided in the bladder.

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