JP2011156698A - Bead setter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bead setter which can reduce an installation space while securing the set accuracy of beads and is small in size and light in weight. <P>SOLUTION: The bead setter 1 has a bead holding member 3 holding the beads B and supplies the beads B held by the bead holding member 3 to a tire component member stuck on a molding drum. The bead holding member 3 has first, second, and third arc-shaped bodies 3a, 3b, and 3c each of which has an arcuate shape and which hold the beads B while approaching each other. The first arc-shaped body 3a is installed movably in the radial direction in a surface intersecting the axis C of the molding drum rectangularly. The second and third arc-shaped bodies 3b and 3c are installed respectively rockably in a surface intersecting the axis C of the molding drum rectangularly on the fulcrum of a rocking fulcrum 17 positioned on the outside in the radial direction of the bead holding member 3. The bead setter 1 additionally has a moving means 15 for moving the first arc-shaped body 3a and at least one rocking means 19 for rocking the second and third arc-shaped bodies 3b and 3c. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a bead setter that includes a bead holding member that holds a bead and supplies the bead held by the bead holding member to a tire constituent member that is affixed to a forming drum, and in particular, ensures the setting accuracy of the bead. However, it is intended to provide a bead setter that can reduce the installation space and is lightweight.

  The bead setter that sets the bead on the tire liner such as the inner liner and ply attached to the forming drum holds the bead until the bead is set, while the bead setting is completed and the bead setter is moved out of the forming drum. Must avoid interference with the bead to avoid damaging or misaligning the set bead.

For this reason, conventionally, various techniques for avoiding interference with a bead set on a tire constituent member on a molding drum or a bead lock mechanism have been proposed. For example, in Patent Document 1, a plurality of movable rods that are movable in the radial direction are provided on the ring frame, and an arc-shaped body that holds a bead is disposed at the radially inner end of the movable rod. A bead supply device is disclosed in which the arcuate body is moved radially outward until it exceeds the bead (including the stiffener or filler) to avoid interference with the bead. In Patent Document 2, as shown in FIG. 4A, a bead is held by a pair of substantially semicircular bead set rings 100a and 100b that can be moved close to and away from each other by a cylinder. A bead setter is disclosed in which the bead set rings 100a and 100b are separated by the action of a cylinder when leaving the vehicle to avoid interference with the beads (bead outermost diameter position B _out ).

Japanese Patent Laid-Open No. 10-034767 JP-A-2-102033

  However, in the bead supply device as disclosed in Patent Document 1, it is necessary to dispose the ring frame that supports the movable rod on the radially outer side of the arcuate body, and therefore the size and weight of the device cannot be avoided. It has become.

  Moreover, in the technique described in Patent Document 2, the length of each bead set ring in the circumferential direction is shortened, and a lacking portion is provided between the bead set rings 100a and 100b (see FIG. 4A). When the bead set rings 100a and 100b are separated from each other, the amount of protrusion Δd to the side of the bead set rings 100a and 100b can be reduced, but the bead holding force cannot be held in this lacking portion. There is a concern that the bead setting accuracy will be reduced. On the other hand, in contrast to FIG. 4 (b), when no bead is provided between the bead set rings 100a and 100b and the entire circumference of the bead can be held by the bead set rings 100a and 100b, When the bead set rings 100a and 100b are separated from each other, the lateral protrusion Δd becomes large, and the installation space increases.

  Therefore, an object of the present invention is to provide a bead setter that can reduce the installation space while ensuring the setting accuracy of the beads and that is small and light.

  The present invention advantageously solves the above problems, and a bead setter according to the present invention includes a bead holding member that holds a bead, and the bead held by the bead holding member is attached to a molding drum. A bead setter to be supplied to a component member, wherein the bead holding member has first, second and third arcuate bodies each having an arc shape and holding the beads in a state of being close to each other. The arcuate body is provided so as to be movable in a radial direction within a plane orthogonal to the axis of the forming drum, and the second and third arcuate bodies are rocking fulcrums positioned radially outward from the bead holding member. And a moving means for moving the first arcuate body to the bead setter, and a second and a third arcuate shape, respectively. The is characterized in that at least one swinging means for swinging, the provided. The “radial direction” here refers to the radial direction of the bead holding member, in other words, the radial direction of a circle centered on the axis of the forming drum.

  In the bead setter according to the present invention, the beads can be held by bringing the arcuate bodies close to each other until the beads are set on the tire constituent member attached to the forming drum. When the bead is set on the tire component and the bead setter is moved away from the molding drum, the moving means moves the first arcuate body in a radial direction within a plane perpendicular to the axis of the molding drum and swings the bead setter. By oscillating the second and third arcuate bodies in a plane perpendicular to the axis of the forming drum by the moving means, and expanding each arcuate body outward, avoid interference with the beads set on the tire component. can do.

  Therefore, according to the bead setter of the present invention, since the second and third arcuate bodies are configured to swing, the bead holding member is expanded outward at the outer edge positions of these second and third arcuate bodies. The expansion width (the amount of protrusion) can be defined, and the installation space can be reduced. Further, since it is not necessary to separately provide a member (for example, the ring frame in Patent Document 1 described above) that supports the second and third arcuate bodies on the radially outer side, a small and lightweight bead setter is provided. On the other hand, the first arcuate body has a low contribution rate to the reduction in installation space (for example, when a member that supports the bead holding member is provided above or below the bead holding member, Since the third arcuate body expands in a horizontal direction perpendicular to the vertical direction, the upper side or the lower side of the bead holding member can be arranged in a manner that contributes to a reduction in installation space). A simple structure can be achieved while preventing the bead holding member from protruding in the direction. In addition, interference with the bead can be avoided when leaving the molding drum without providing a lacking portion (see FIG. 4A) that cannot hold the bead as described above, so that the bead is almost entirely covered. Can be held.

  The bead setter according to the present invention comprises at least one conveying means for supporting the bead holding member and movably guiding the bead holding member along the axial direction of the forming drum, and the first arcuate body. Is preferably disposed opposite to the conveying means.

  In the bead setter of the present invention, it is preferable that the first, second and third arcuate bodies form a substantially annular shape in a state of being close to each other. Here, the “substantially annular shape” includes not only the case where the ends of the first, second and third arcuate bodies are in contact with each other, but also the mutual relationship between the first, second and third arcuate bodies. A case where there is a gap (for example, 10 degrees or less) that does not affect the bead holding force is included.

  Furthermore, it is preferable that each of the first, second and third arcuate bodies has a plurality of magnets for attracting and holding the beads.

  According to the present invention, it is possible to reduce the installation space while ensuring the setting accuracy of the beads, and to provide a small and lightweight bead setter.

It is the side view which showed the bead setter of one Embodiment according to this invention with the forming drum. It is a figure which shows the bead setter of the said embodiment, (a) is an AA arrow directional view in FIG. 1, (b) is a BB arrow directional view in FIG. 2 (a). It is a side view explaining operation | movement of the bead setter of the said embodiment. It is a figure explaining each conventional bead setter, (a) shows what has a lack part between bead set rings which oppose right and left, and (b) has no lack part between bead set rings which oppose right and left. Shows things.

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

  A bead setter 1 according to this embodiment includes a pair of beads arranged on a tire constituent member T such as an inner liner and a ply attached to a molding drum 2a of a molding machine 2 at a predetermined interval in the axis C direction of the molding drum 2a. As shown in FIG. 1, a pair of bead holding members 3, 3 that can hold and release the bead B and oppose each other in the front-rear direction of the axis C, and the bead holding members 3, 3 And a pair of transfer bases 4 and 4 serving as transfer means for guiding the bead holding members 3 and 3 movably back and forth along the axis C.

  The forming drum 2a is rotatably supported by the drive device 2c via the main shaft 2b, and has a cylindrical outer peripheral surface that forms a band by winding a tire constituent member T such as an inner lie and a ply. Rails 7 extending in the front-rear direction (left-right direction in the figure) are laid on the respective bases 6 rearward (rightward in the figure) in the direction of the axis C from the drive device 2c.

  As shown in FIG. 2, one transport base 4 is shown and described. Each transport base 4 has a base plate 8, and the lower surface of the base plate 8 is slidably engaged with the rail 7. A slide bearing 9 is provided as a guide means. Further, a pinion gear 11 to which a rotational force from a motor 10 as a conveying base driving means is transmitted is provided on the lower surface of the base plate 8, and the pinion gear 11 is laid along the axis C of the forming drum 2a. The transport base 4 is moved in the direction of the axis C by engaging with the rack gear 12 formed.

  In addition, one bead holding member 3 is shown and described as a representative of FIG. 2, and each bead holding member 3 has an arc shape and cooperates in a state close to each other (hereinafter referred to as “closed state”). The first arcuate body 3a, the second arcuate body 3b, and the third arcuate body 3c forming a substantially annular shape. Accordingly, between the first, second and third arcuate bodies 3a, 3b and 3c, the lacking portions (bead set rings 100a and 100b) as described in FIG. At the same time, there is no lacking part for reducing the amount of protrusion Δd. Further, each arcuate body 3a, 3b, 3c has a large number of magnets 14 that adsorb and hold the beads B at the inner end portions thereof.

The first arcuate body 3a is disposed opposite to the transport base 4 and is a piston rod of a cylinder 15 as a moving means driven by air pressure or hydraulic pressure fixed vertically to the base plate 8 of the transport base 4. It is connected to the tip of 15a. Thus, the first arc-shaped body 3a is provided so as to be movable in the radial direction (here, the vertical direction) within a plane orthogonal to the axis C of the forming drum 2a. The second and third arcuate bodies 3b and 3c are arranged opposite to each other on both sides of the first arcuate body 3a. The second and third arcuate bodies 3b and 3c have circumferential lengths in which their upper ends are in contact with each other in the closed state. Protruding portions 3b ₁ and 3c ₁ are connected to the lower ends of the second and third arcuate bodies 3a and 3b, respectively, toward the outside. One end of a swinging arm 18 supported by a pin 17 as a swinging fulcrum fixed to a bracket 16 erected on the base plate 8 is connected to the tip of each projecting portion 3b ₁ , 3c ₁ . The pin 17 as a swing fulcrum is disposed on the radially outer side of the closed bead holding member 3 and between the second and third arcuate bodies 3 b and 3 c and the base plate 8. The other end of each oscillating arm 18 is connected to the tip of a piston rod 19a of a cylinder 19 driven by air pressure or hydraulic pressure attached to the base plate 8 substantially horizontally. The swing arm 18, the pin 17 and the cylinder 19 constitute swing means for swinging the second and third arcuate bodies 3b and 3c.

Therefore, as shown by phantom lines and arrows in FIG. 2, when the piston rod 15a of the cylinder 15 vertically attached to the base plate 8 is retracted, the first arcuate body 3a is in the plane perpendicular to the axis C of the forming drum 2a. When the piston rod 19a of the cylinder 19 mounted horizontally on the base plate 8 is retracted, the second and third arcuate bodies 3b and 3c are formed on the forming drum via the swinging arm 18, respectively. 2a is developed outward in a plane perpendicular to the axis C of 2a. In the state where each arcuate body 3a, 3b, 3c is expanded outward (the state indicated by the phantom line in FIG. 2, hereinafter referred to as “deployed state”), the innermost of each arcuate body 3a, 3b, 3c. Piston rods 15a of the respective cylinders 15, 19 are arranged such that the ends P _3a , P _3b , P _3c are positioned radially outward from the outermost diameter position B _out of the bead B indicated by phantom lines in FIG. The advance / retreat distance 19a is set.

  Next, the operation of the bead setter 1 of this embodiment will be described. Here, it is assumed that a tire constituent member T such as an inner liner or a ply is already wound around the outer periphery of the forming drum 2a.

  First, as shown in FIG. 3A, the piston rods 15a and 19a of the cylinders 15 and 19 of the bead setter 1 are protruded, respectively, and the first, second and third arcuate bodies 3a of the bead holding member 3 are formed. 3b and 3c are closed (state shown by a solid line in FIG. 2A). Then, with these first, second and third arcuate bodies 3a, 3b and 3c closed, a bead B with filler or stiffener delivered to the bead holding member 3 from a bead delivery device (not shown) or the like. Hold.

Next, as shown in FIG. 3B, the bead setter 1 is advanced along the axis C of the forming drum 2a by the transport base 4, and the bead B is set on the tire constituent member T on the forming drum 2a. After the setting of the bead B is completed, the first, second, and third of the bead holding member 3 are retracted by retracting the piston rods 15a, 19a of the cylinders 15, 19 as indicated by phantom lines in FIG. The arcuate bodies 3a, 3b, 3c are expanded outward. Then, as shown in FIG. 3 (c), the bead setter 1 is retracted along the axis C of the forming drum 2a. At this time, the innermost ends P _3a , P _3b , and P _3c of the first, second, and third arcuate bodies 3a, 3b, and 3c are positioned radially outward from the outermost diameter position B _out of the set bead B. Therefore, the bead holding member 3 and the bead B set on the tire constituent member T do not interfere when the bead setter 1 is moved away.

Therefore, according to this bead setter 1, since the second and third arcuate bodies 3b and 3c are swung when avoiding the bead B, the second and third arcuate bodies 3b and 3c The width (the amount of protrusion Δd) when the bead holding member 3 is deployed outward with the outer edge positions Q _3b and Q _3c can be defined, and the installation space can be reduced. Further, since it is not necessary to separately provide a member (for example, the ring frame in Patent Document 1 described above) that supports the second and third arcuate bodies 3b and 3c on the outer side in the radial direction, a small and lightweight bead setter 1 is provided. Brought about. On the other hand, the first arcuate body 3a is provided with a place (for example, a member 4 supporting the bead holding member 3) on the upper side or the lower side in the vertical direction of the bead holding member with a low contribution rate to the reduction of the installation space. In this case, since the second and third arcuate bodies 3b and 3c are expanded in the horizontal direction perpendicular to the vertical direction, the upper or lower side of the bead holding member 3 has a low contribution to the reduction in installation space. ), It is possible to provide a simple structure while preventing the bead holding member 3 from protruding in a predetermined direction. In addition, interference with the bead B can be avoided when leaving the molding drum without providing a lacking portion (see FIG. 4A) that cannot hold the bead as described above. It can be set as the structure which can be hold | maintained over this. Further, since the arc-shaped bodies 3a, 3b, 3c can be replaced or repaired at the time of failure, the maintenance is facilitated.

  Moreover, according to the bead setter 1 of this embodiment, the first arc-shaped body 3a is disposed opposite to the transport base 4 as the transport means, that is, a place where the contribution ratio to the reduction of the installation space is low. Since the first arcuate body 3a is arranged in the first position, the simple structure can be ensured while suppressing the protrusion of the bead holding member 3 in a predetermined direction.

  Furthermore, according to the bead setter 1 of this embodiment, the first, second and third arcuate bodies 3a, 3b, 3c form a substantially annular shape in a state of being close to each other, that is, a bead holding member. Since the lack portion is not provided in 3, the bead holding force can be increased by holding the entire circumference of the bead B by the bead holding member 3, and thus the setting accuracy of the bead B can be improved.

  Further, according to the bead setter 1 of this embodiment, a plurality of magnets 14 are provided on the inner end portions of the first, second and third arcuate bodies 3a, 3b, 3c, respectively, and the beads B are attracted by the magnets 14. Since it hold | maintains, while being able to hold | maintain the bead B reliably and without being damaged, the further size reduction of the whole apparatus can be achieved.

  Moreover, according to the bead setter 1 of this embodiment, since the pair of bead holding members 3 and 3 are arranged on the separate transport bases 4 and 4, the distance between the transport bases 4 and 4 can be adjusted. Thus, the left and right bead holding members 3 and 3 can be easily distributed (alignment in the direction of the axis C).

  As mentioned above, although demonstrated based on the example of illustration, this invention is not limited to the above-mentioned example. For example, in the above example, a cylinder driven by pneumatic pressure or hydraulic pressure is used as the moving means for moving the first arcuate body 3a and the swinging means for swinging the second and third arcuate bodies 3b and 3c. Instead of this, the first arc-shaped body 3a may be moved or the second and third arc-shaped bodies 3b and 3c may be swung via the swing arm 18 by advancing and retracting action by a screw mechanism. In the above example, the transport base 4 as the transport means is provided on the lower side of the bead holding member 3, but may be provided on the upper side or the side. Furthermore, the bead holding member 3 provided in the bead setter 1 may be one. In addition, a plurality of bead holding members 3 adapted to different bead sizes may be mounted on each transport base 4, which makes it possible to respond quickly to a bead size change and support full automation. Bead setter.

  Thus, according to the present invention, it is possible to reduce the installation space while ensuring the setting accuracy of the beads, and to provide a small and lightweight bead setter.

DESCRIPTION OF SYMBOLS 1 Bead setter 2a Molding drum 3 Bead holding member 3a 1st arcuate body 3b 2nd arcuate body 3c 3rd arcuate body 4 Conveyance base (conveyance means)
14 magnet 15 cylinder (moving means)
17 pin (rocking fulcrum)
18 Swing arm 19 Cylinder

Claims (4)

A bead setter that includes a bead holding member that holds a bead, and that supplies the bead held by the bead holding member to a tire constituent member attached to a molding drum,
Each of the bead holding members has first, second and third arcuate bodies each having an arc shape and holding the beads in a state of being close to each other,
The first arcuate body is provided to be movable in a radial direction within a plane perpendicular to the axis of the forming drum,
The second and third arcuate bodies are provided so as to be swingable within a plane perpendicular to the axis of the forming drum, with a swinging fulcrum located radially outward from the bead holding member as a fulcrum,
A bead setter, wherein the bead setter is provided with moving means for moving the first arcuate body and at least one swinging means for swinging the second and third arcuate bodies.   The apparatus includes at least one conveying unit that supports the bead holding member and movably guides the bead holding member along the axial direction, and the first arcuate body is disposed to face the conveying unit. Item 2. A bead setter according to item 1.   The bead setter according to claim 1 or 2, wherein the first, second and third arcuate bodies form a substantially annular shape in a state of being close to each other.   The bead setter according to any one of claims 1 to 3, wherein each of the first, second, and third arcuate bodies includes a plurality of magnets that attract and hold the beads.

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