JP2009113342A - Stitcher roll device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stitcher roll device which can generate the wrinkle of a member without weakening press bonding and shorten a molding time period, even when a transverse travel speed is increased. <P>SOLUTION: In the stitcher roll device 10 which has a cylindrical roll 1, an arm part 2 supporting the roll 1, and a stretching/contracting member 3 with one end attached to the arm part 2 and the other end attached to a fixed member, and is brought into pressure-contact with the surface of a drum 50 rotating belt-shaped members 51a and 51b by the roll 1. Between the arm 2 and the elastic member 3, arranged is a rotation mechanism 4 which makes the cylindrical roll 1 rotatable with the center of the arm 2 and the member 3 as rotation axis. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stitcher roll device used when, for example, a belt-shaped member is pressed against a surface of a rotating drum used in a pneumatic tire molding machine or the like.

  In general, when manufacturing a pneumatic tire, a member constituting the tire such as an inner liner, a carcass ply, a belt, and a tread is sequentially wound on a molding drum to form a green tire. Vulcanized with a mold. At the time of molding the tire, for the purpose of improving the adhesive force between the members and bleeding the air between the members, the stitcher roll is traversed while pressing the members, and the drum is rotated so that the entire surface of the members is covered. Stitching is performed (see, for example, Patent Document 1).

  FIG. 4 is an explanatory diagram showing a use state of a conventional stitcher roll device 30, and the stitcher roll device 30 supports a cylindrical stitcher roll 31 (hereinafter also referred to as a roll) and the stitcher roll 31. The arm portion 32 includes an air cylinder (expandable member) 33 having one end attached to the arm portion 32 and the other end attached to a fixing member.

  The rod 33m of the air cylinder 33 is extended so that the stitcher roll 31 is brought into pressure contact with, for example, the surface of the molding drum 50 around which the belt-like members 51a and 51b are wound, and the laminated belt-like members 51a and 51b are stitched. . Thereby, the air staying between the band-shaped members 51a and 51b can be discharged to the outside, and the band-shaped members 51a and 51b can be securely bonded to each other.

Patent Document 2 discloses a stitcher roll device in which a damper is installed in parallel with the elastic member 33. Further, Patent Document 3 discloses a stitcher roll device having a plurality of pin members on the outer peripheral surface of the stitcher roll 31.
Japanese Patent Laid-Open No. 2003-236949 Japanese Patent Laid-Open No. 2007-160569 Japanese Patent Laid-Open No. 2007-76221

  However, in the stitcher roll device 30 described in Patent Documents 1 to 3, since the stitcher roll 31 is mounted perpendicular to the drum 50 axial direction as shown in the figure, the stitcher roll 31 is increased when the traversing speed is increased. There is a problem that wrinkles are generated in the belt-like members 51a and 51b, particularly the thin sheet-like member 51b due to the side slip. For this reason, the traversing speed cannot be increased, and this has been one of the reasons why the molding time cannot be shortened. Further, the pressing pressure of the stitcher roll 31 cannot be increased during traversal, and there is a problem that the pressure bonding becomes weak during that time.

  Accordingly, an object of the present invention is to solve the above-described problems in the prior art, and even when the traversing speed is increased, the member can be wrinkled without weakening the crimping, and the stitcher roll capable of shortening the molding time. To provide an apparatus.

  As a result of intensive studies to solve the above problems, the present inventor can increase the traversing speed without causing the stitcher roll to skid by providing a specific mechanism between the arm portion and the elastic member. As a result, the present invention has been completed.

  That is, the stitcher roll device of the present invention includes a cylindrical roll, an arm portion that supports the roll, and an elastic member having one end attached to the arm portion and the other end attached to a fixed member. In the stitcher roll device that presses the belt-shaped member against the surface of the rotating drum, the rotation mechanism that allows the cylindrical roll to rotate between the arm portion and the telescopic member with the central axis as a rotation axis It is characterized by having installed.

  In addition, another stitcher roll device of the present invention includes a cylindrical roll, an arm portion that supports the roll, and an elastic member having one end attached to the arm portion and the other end attached to a fixing member, In the stitcher roll device that presses the surface of the drum that rotates the belt-shaped member by the roll, both side surfaces of the cylindrical roll can be moved up and down with the shaft as a fulcrum between the arm portion and the elastic member. The up-and-down variation mechanism is installed.

  According to the present invention, it is possible to provide a stitcher roll device that can wrinkle a member without weakening the crimping even if the traversing speed is increased, and can shorten the molding time by adopting the above configuration. became.

Hereinafter, preferred embodiments of the present invention will be described in detail.
FIG. 1 is a partial perspective view showing a stitcher roll device 10 according to a preferred embodiment of the present invention. A stitcher roll apparatus 10 according to the present invention includes a cylindrical roll (stitcher roll) 1, an arm portion 2 that supports the roll 1, and an elastic member having one end attached to the arm portion 12 and the other end attached to a fixing member. 13, and a rotation mechanism 4 is provided between the arm portion 2 and the expansion / contraction member 3 so that the cylindrical roll 1 is rotatable about the central axis as a rotation axis.

  The stitcher roll device 10 extends the rod 3m of the elastic member 3 so that the roll 1 is brought into pressure contact with the surface of the molding drum 50 around which the belt-like members 51a and 51b shown in FIG. Stitch.

  As the rotating mechanism 4 in the present invention, for example, there is a mechanism in which a thrust bearing having a pressure resistance is incorporated in the rotating shaft, whereby the roll 1 can rotate without resistance against the stitcher pressure, and the roll 1 is perpendicular to the drum 50 axial direction. Not only the position but also the angle can be changed freely. Moreover, since this rotation mechanism 4 does not require power in particular, it can be easily replaced with existing equipment.

  FIG. 2 is an explanatory diagram showing the movement of the rolls 1 and 31 of the stitcher roll device 10 of the present invention and the conventional stitcher roll device 30. In the figure, the arrow indicates the movement of the member 51b. Since the roll 1 in the present invention is rotated by the rotation mechanism 4, the roll 1 does not skid even when traversing, the traversing speed can be increased, and wrinkling can be prevented. In addition, the molding time can be shortened, and further, it is not necessary to reduce the pressing pressure of the roll even during traversal, so that sufficient crimping between the members is possible.

  In the rotating mechanism 4 according to the present invention, a stopper (not shown) may be attached to the rotating shaft so that it does not rotate more than necessary.

  Furthermore, in the rotating mechanism 4 according to the present invention, a spring (not shown) can be attached to the rotating shaft so that the rotation angle of the roll 1 can be fixed to 0 in an unloaded state.

  Furthermore, in the rotation mechanism 4 according to the present invention, a stopper pin (not shown) that enters and exits by a cylinder can be provided on the rotation shaft, and the rotation angle of the roll 1 can be locked at an arbitrary position.

  Furthermore, when the rotation of the drum 50 is used only in one direction, the roll 1 in the rolling direction and the rotation shaft of the rotation mechanism 4 are offset to further improve the followability of the roll 1 to the drum 50. Can be raised. Further, when the rotation of the drum 50 is forward / reverse, the offset is set to zero.

  FIG. 3 is a partial perspective view showing a stitcher roll device 20 of another preferred embodiment of the present invention. The stitcher roll device 20 includes a cylindrical roll 21, an arm part 22 that supports the roll 21, and an elastic member 23 having one end attached to the arm part 22 and the other end attached to a fixing member. Between the portion 22 and the expansion / contraction member 23, an up-and-down changing mechanism 25 that allows the both side surfaces of the cylindrical roll 21 to move up and down is installed using these axes as fulcrums. With this roll 21, the belt-shaped members 51a and 51b shown in FIG. 4 are pressed against the surface of the rotating drum 50. As a result, as in the case of the preferred example, the pressure contact angle when the roll 21 and the drum 50 rotating the belt-like members 51a and 51b are pressed during traversing can be changed without changing the pressing pressure. As a result, the roll 21 does not slide sideways, the traversing speed can be increased, and the generation of wrinkles can be prevented.

  The vertical movement mechanism 25 in FIG. 3 has an upper and lower two-layer structure and a member serving as a fulcrum (fulcrum member) at the center so as to be sandwiched between those layers, and the layer on the roll 21 side (upper layer) is The fulcrum member can be tilted up and down against a repulsive force of a pair of springs, for example. In this up-and-down moving mechanism 25, the upper layer of the two-layer structure is inclined with respect to the force received when the roll 21 traverses, and the pressure contact angle when the roll 21 and the drum 50 rotating the belt-shaped members 51a and 51b are pressed is changed. be able to.

Hereinafter, the present invention will be described in more detail with reference to examples.
In single molding of a construction machine tire, a band-shaped member was stitched using a stitcher roll device 10 shown in FIG. As a result, compared with the case where the conventional stitcher roll device 30 shown in FIG. 4 is used, the maximum value of the overall stitcher pressure is 10% or more, the maximum value of the drum rotation speed during stitching is 20% or more, and the roll traverse ratio (The traversing distance with respect to the number of revolutions) could be improved by 20% or more.

It is a fragmentary perspective view which shows the stitcher roll apparatus of the suitable example of this invention. It is explanatory drawing which shows the motion of the roll of the stitcher roll apparatus of this invention, and the conventional stitcher roll apparatus. It is a fragmentary perspective view which shows the stitcher roll apparatus of the other suitable example of this invention. It is explanatory drawing which shows the use condition of the conventional stitcher roll apparatus.

Explanation of symbols

10, 20, 30 Stitcher roll device 1, 21, 31 Stitcher roll (roll)
2, 22, 32 Arms 3, 23, 33 Air cylinder (expandable member)
3m, 23m, 33m Rod 4 Rotating mechanism 25 Vertical movement mechanism 50 Molding drums 51a and 51b Band-shaped members

Claims (2)

A drum surface that includes a cylindrical roll, an arm portion that supports the roll, and an elastic member having one end attached to the arm portion and the other end attached to a fixed member, and the belt-like member is rotated by the roll. In the stitcher roll device pressed against
A stitcher roll device characterized in that a rotation mechanism is provided between the arm portion and the telescopic member so that the cylindrical roll is rotatable about the central axis as a rotation axis. A drum surface that includes a cylindrical roll, an arm portion that supports the roll, and an elastic member having one end attached to the arm portion and the other end attached to a fixed member, and the belt-like member is rotated by the roll. In the stitcher roll device pressed against
A stitcher roll device characterized in that an up-and-down variation mechanism is provided between the arm portion and the expansion and contraction member so that both sides of the cylindrical roll can be moved up and down with these axes as fulcrums.

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