JPH0347185B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stitcher device for a tire molding machine, and more particularly, to a stitcher device for a tire molding machine, in particular, a stitcher device for pressing a molding material stuck to the shoulder of a tire molding drum is connected to an arm to which the compression roller is attached. While rotating around the support shaft while being in pressure contact with the molding material by turning, the pressure roller is rotated using one end of the support shaft as a fulcrum, and the rotation fulcrum of the pressure roller is slid in the direction of the rack axis using a rack and pinion mechanism. It is moved to the main shaft side of the tire molding drum via a moving frame.
By providing a mechanism that controls the rotation and movement speed of the pressure roller through the frame, it is possible to remove the molding material that is stuck outward from the shoulder of the tire molding drum using a simple operating mechanism and control mechanism. It is designed to be crimped with high adhesion.

When molding a green tire using a tire molding machine, it is necessary to exhaust the air remaining between the surfaces of the molding material wrapped around the molding drum. Pressure bonding is performed using rollers. Among these molding materials, for example, after the end of the carcass material is folded and rolled up around a bead core attached to the side of the molding drum, a second filler rubber is pasted on top of this rolled up part, and The molding material such as side tread rubber attached to the drum protrudes slightly outward from the shoulder of the molding drum. In order to completely press the entire surface of the molding material, the pressure roller must be rotated while being in pressure contact with the shoulder of the molding drum, rotate around the shoulder, and move toward the main shaft of the molding drum. A multidimensional action is required to do so. However, this type of conventional stitcher device does not have the above-mentioned operating mechanism, so there are problems with adhesion, such as the formation of parts where the molding material peels off from the molding drum. If the device were to be equipped with all of the above operating mechanisms, a complicated drive mechanism and control mechanism would be required, and the device as a whole would be a large and heavy structure, which would not only result in high production costs but also However, it also has the disadvantage of being difficult to control.

This invention has been made to eliminate the above-mentioned drawbacks, and an object of the present invention is to press, rotate, and rotate the pressure roller against the forming drum only by the rotating operation of the arm to which the pressure roller is attached. It is an object of the present invention to provide a stitching device for a tire molding machine that is equipped with an operating mechanism and a control mechanism that allow multiple movements to be performed simultaneously. Another object of the present invention is to provide a stitcher device for a tire molding machine that can be easily controlled.

That is, as shown in the embodiments and drawings to be described later, the present invention includes an arm 22 that is rotatably disposed near and away from the shoulder of the tire building drum 10, and supports the support shaft 52 of the pressure roller 50. A frame 34 in which a main drive gear 40 with one end fixed and a driven gear 45 that meshes with the main drive gear 40 are pivotally supported.
a and 34b are slidably mounted on the tip of the arm 22, the driven gear 45 is engaged with the rack 30 fixed to the tip of the arm 22, and the arm 22 is attached to the shoulder of the tire molding drum 10. The pressure roller 50, which has been rotated to the side and brought into contact with the tire molding material 16 affixed to the shoulder, is moved to the tire molding drum 10.
The rotational direction of the pressure roller 50 is rotated around the support shaft 52 in a direction opposite to the rotation direction of the tire molding drum 10 , and rotated outward of the tire building drum 10 using the support shaft 41 of the main drive gear 40 as a fulcrum, and the rotation fulcrum of the pressure roller 50 is Frames 34a, 34 sliding by rack and pinion mechanism
The pressure roller 50 is moved in the axial direction of the rack 30 via the frame 34b, and is provided with a rotation and movement control mechanism 36 that regulates the rotation and movement speed of the pressure roller 50 via the back pressure of the frames 34a and 34b. This relates to a stitcher device for a tire molding machine.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic plan view showing the stitcher device of the present invention on one shoulder side of the forming drum, showing the state in a standby position before the start of operation, and FIGS. 2 and 3 respectively show the stitcher device in operation. FIG. 4 is an enlarged plan view of the current state, with some parts omitted and some sections taken, and FIG. 4 is an enlarged sectional view taken along the line X--X in FIG. 3. In the above figure, reference numeral 10 designates a forming drum, which is rotatably supported around a main shaft 12. Reference numeral 20 denotes a support of the stitcher device, and its position can be adjusted according to the width and diameter of the forming drum 10. An arm 22 is attached to this support base 20 so as to be pivotable about a shaft 21 . Further, a swingable pneumatic or hydraulic cylinder 24 is attached to the support base 20 via a pin 23, and a metal fitting 26 fixed to the tip of a piston rod 25 of the cylinder 24 is connected to the arm 22 via a pin 27. and the piston rod 2 of the cylinder 24
When the arm 22 is extended, the arm 22 pivots and approaches the shoulder of the forming drum 10.

A block 28 is attached to the tip of the arm 22, and a pair of guide rods 29a, 29b and a rack 30 are fixed to the block 28 in parallel with each other.
An end plate 31 attached to the tip of b is fixed with a nut 32.

As shown in FIG. 4, frames 34a and 34b each having a linear sliding bearing 33 fitted therein are fitted into the guide rods 29a and 29b. The frames 34a and 34b are integrally connected by a boss 35 attached to one end thereof, and are guided by guide rods 29a and 29b so that the rack 3
It is designed to be able to slide in the 0 axis direction. The cylinder 37 of the hydro regulator 36 is fitted onto the boss 35, and the rod 38 is attached to the end plate 3.
It is placed in contact with 2.

Further, as shown in FIGS. 2 and 4, at the other ends of the frames 34a and 34b, a support shaft 41 to which a fan-shaped main drive gear 40 is attached is rotatably supported by a ball bearing 42. Nuts 43 are screwed onto both ends of 41 to prevent them from falling off. A small diameter gear 46 is provided between the main drive gear 40 and the rack 30.
and a large-diameter gear 47 are integrally formed.
5, the small diameter gear 46 is connected to the small diameter gear 40,
The large diameter gear 47 is in mesh with the rack 30, and the driven gear 45 is attached to the frames 34a, 34.
It is rotatably supported via a needle roller bearing 49 on a support shaft 48 fixed to b.

One end of a support shaft 52 to which a pressure roller 50 is rotatably attached via a ball bearing 51 is fixed to the support shaft 41 of the main drive gear 40 .

Further, a spring 55 is attached between the frame 34a and the block 28 of the arm 22, and the spring 55 is hooked at both ends by bolts 53 and 54.

Next, the operation of each mechanism when compressing tire molding material with the stitcher device having the above configuration will be explained.

As shown in FIG. 1, a carcass material 14 is wound around the molding drum 10, and both ends are folded back around the bead core 13 and rolled up. It is assumed that the second filler rubber material 16 is crimped.

First, the cylinder 24 is moved from the standby position shown in FIG.
is actuated to extend the piston rod 25 and pivot the arm 22 in the direction of arrow A in the figure.

When the arm 22 approaches the shoulder of the molding drum 10, the circumferential surface of the pressure roller 50 that has rotated together with the arm 22 comes into contact with the second filler rubber material (hereinafter referred to as "molding material") 16, as shown in FIG. . As a result, the pressure roller 50 rotates around the support shaft 52 in a direction opposite to the rotational direction of the molding drum 10 due to contact friction with the molding material 16 . The pressure roller 50 also includes a forming drum 10.
Since a reaction force of the pressing force acts on the main drive gear 40, the main drive gear 40 rotates outward of the molding drum 10 (in the direction of arrow B in the figure) about the support shaft 41 of the main drive gear 40 as a fulcrum. The rotation of the pressure roller 50 causes the main gear 40 to rotate in the same direction as the pressure roller 50, and the large diameter gear 47 of the driven gear 45 rotates in the direction of arrow C in the figure through the small diameter gear 46 meshed with the main drive gear 40. Rotate to. The large-diameter gear 47 of the driven gear 45 is meshed with the rack 30 fixed to the block 28 of the arm 22, so when the driven gear 45 rotates, the frame to which the driven gear 45 and the main driving gear 40 meshing with it are attached. 34a and 34b slide toward the axial front end of rack 30 (in the direction of arrow D in the figure) against the force of spring 55 while being guided by guide rods 29a and 29b.

As described above, the pressure roller 50 rotates around the support shaft 52 when it comes into contact with the molding material 16 on the shoulder of the molding drum 10 , and rotates around the support shaft 41 of the main drive gear 40 as a fulcrum to support the molding drum 10 . Rotating outward, the support shaft 41 of the main gear 40, which is the rotational fulcrum of the pressure roller 50, moves in the axial direction of the rack 30 via the frames 34a and 34b while rotating in the same direction as the arm 22. do.

In this way, the rotation fulcrum of the pressure roller 50 with the support shaft 41 of the main drive gear 40 as a fulcrum draws a movement trajectory that is a combination of the rotation trajectory of the arm 22 and the movement trajectory of the frames 34a and 34b.
Therefore, the pressure roller 50 moves from a position in which its support shaft 52 is inclined with respect to the main shaft 12 of the molding drum 10 to move around the shoulder of the molding drum 10 toward the main shaft side of the molding drum 10. The posture will be as shown in Figure 3.

The pressure roller 50 contacts the molding material 16 attached to the shoulder of the molding drum 10 and rotates about the support shaft 41 of the main drive gear 40, and the rotation support is connected to the rack shaft via the frames 34a and 34b. When moving in the direction, the cylinder 37 of the hydro regulator 36 attached to the boss 35 of the frames 34a, 34b moves together with the frames 34a, 34b, but the tip of the rod 38 of the hydro regulator 36 is attached to the end plate 31. Since the rod 38 is in contact with the cylinder 37, as the cylinder 37 of the hydroregulator 36 moves, the rod 38 is pushed against the pressure oil in the cylinder 37. For this reason, the pressure roller 5
0, the back pressure from the frames 34a and 34b acts, and the rotational speed and moving speed thereof are reduced. When the rod 38 of the hydroregulator 36 is pushed into the cylinder 37 a full stroke, the arm 22 stops pivoting. This completes the rotation and movement process of the pressure roller 50.

Due to the rotation and movement of the pressure roller 50,
The molding material 16 on the shoulder portion of the molding drum 10 is sequentially pressed from the inside to the outside, which is the pasting area, but the rotation and movement speed of the pressure roller 50 is determined by the hydrolegging of the frames 34a and 34b. Since it is regulated by the back pressure received from the generator 36, the force that presses the molding drum 10 not only provides the necessary and sufficient pressing force against the molding material 16, but also allows the molding material 16 to be molded. Even when rotating together with the drum 10, the rotation locus of the pressure contact point does not deviate, and the pressure contact point is pressed over almost the entire surface, so that it is completely in close contact with the rolled up portion 15 of the carcass material 14.

The control mechanism for regulating the rotation and movement speed of the pressure roller 50 is not limited to the hydroregulator of the above embodiment, but may also include other control mechanisms having the same function, such as elastic elastic members such as springs. You can also use

In the embodiment shown in FIGS. 2 and 3, the pressure roller 50 rotates from the position where it contacts the shoulder of the molding drum 10 in an inclined position, and rotates around the shoulder toward the main shaft of the molding drum 10. The figure shows a case in which the pressure roller 50 moves toward a position perpendicular to the main axis of the molding drum 10 and then stops. It can be set arbitrarily by changing, for example, the pressure roller 50
is rotated from a position where it is brought into contact with the inner edge of the molding material 16 in a posture substantially parallel to the cylindrical portion of the molding drum 10, and moved around the shoulder portion of the molding drum 10 toward the main shaft side, It is also possible to move the molding drum 10 beyond a position perpendicular to the main axis and into an oblique position.

The pressure roller 50 shown in FIG. 2 and FIG. The rotation angle of the pressure roller 50 with the support shaft 41 as the fulcrum and the transition distance of the rotation fulcrum in the rack axis direction corresponding to this rotation angle are the small diameter gear 4 of the main gear 40 and the driven gear 45.
6, and the ratio of the number of teeth in the rack and pinion configuration composed of the large-diameter gear 47 of the driven gear 45 and the rack 30, the combination ratio of the amount of rotation and the amount of movement can be freely set. from,
The amount of movement is made larger than in the case of FIG. 3, and the molding drum 10 is moved to a position closer to the main shaft side, and the pressure contact point against the molding material 16 is sequentially moved to a position opposite to the rotation fulcrum side of the pressure roller 50. It is also possible to shift it toward the end face side.

As described above, by keeping the pressure contact point of the pressure roller 50 with respect to the molding material 16 almost constant, a force that draws the molding material 16 toward the main shaft side of the molding drum 10 is exerted, so that the initial sticking area of the molding material 16 is No more peeling. Furthermore, if the pressure contact point of the pressure roller 50 is sequentially shifted to the end face on the opposite rotation fulcrum side, the molding material 16 is scraped off toward the main shaft side of the molding drum 10, so that the pressure bonding condition can be further improved. can.

When the stitching device is returned to the standby position after the crimping of the molding material 16 is completed, the arm 22
The piston rod 25 of the cylinder 24 is contracted, and the arm 22 is pivoted in the return direction opposite to the A direction. When the pressure roller 50 is separated from the molding material 16 by the return rotation of the arm 22, the contraction force of the spring 55 stretched between the block 28 of the arm 22 and the frame 34a is applied to the frame 34.
a and 34b, the large diameter gear 47 of the driven gear 45 meshed with the rack 30 is rotated in the direction opposite to the C direction, and the frames 34a and 34b slide toward the rear end of the rack 30 in the axial direction. do. Due to the rotation of the driven gear 45, the main drive gear 40 meshed with the small diameter gear 46 rotates in the direction opposite to the B direction, and the pressure roller 50 rotates in the same direction as the main drive gear 40 with the support shaft 41 of the main drive gear 40 as a fulcrum. move.
As a result, the frames 34a, 34b and the pressure roller 50 return to their original positions, and together with the arm 22, return to the standby position shown in FIG. As the frames 34a and 34b return, the rod 38 protrudes from the cylinder 37 of the hydroregulator 36 and returns to its original position.

In the above embodiment, the case where the second filler rubber material is crimped is explained, but the side tread rubber material can also be crimped in the same manner.

As explained above, the present invention includes a frame equipped with a rack and pinion mechanism that is slidably mounted on the tip of an arm that is rotatably disposed relative to the shoulder of a tire building drum. One end of the support shaft of the pressure roller is fixed to the support shaft of the main drive gear of the pinion mechanism, and the pressure roller is pressed against the molding material stuck to the shoulder of the molding drum by the swinging action of the arm, and the pressure roller is rotated around the support shaft. While rotating the molding drum, rotate it toward the outside of the forming drum using one end of the support shaft as a fulcrum.
The rotation fulcrum of the pressure roller is moved in the direction of the rack axis via a sliding frame by a rack and pinion mechanism.

Therefore, according to the present invention, by simply rotating the arm, the shoulder of the molding drum is rotated while the pressure roller is in pressure contact with the molding material stuck to the shoulder of the molding drum. A plurality of operations such as rotating around the drum and moving it toward the drum shaft are performed simultaneously. Further, according to the present invention, the rotation and movement control mechanism of the pressure roller is provided in the frame, and the rotation and movement speed of the pressure roller is regulated by the back pressure of the frame. Furthermore, it becomes possible to press almost the entire surface of the molding material without reducing the force.

Furthermore, the stitcher device of the present invention not only has an extremely simple operating mechanism and control mechanism for each component, making it easy to operate and control, but also has the advantage that it is small and lightweight, so it can be manufactured at low cost. be.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the standby position of the stitcher device of the present invention, FIGS. 2 and 3 respectively show the operating state of the stitcher device of the present invention, and FIG. 2 shows the pressure roller when the arm is pivoting. FIG. 3 is a plan view showing the rotation and movement state of the pressure roller at the end of the movement process. FIG.
FIG. 3 is an enlarged cross-sectional view taken along a line. In the figure, 10 is a tire molding drum, 16 is a tire molding material, 22 is an arm, 30 is a rack, 34
a, 34b are frames, 36 is a hydro regulator, 40 is a main drive gear, 41 is a support shaft of the main drive gear,
45 is a driven gear, 50 is a pressure roller, and 51 is a support shaft of the pressure roller.

Claims (1)

[Claims] 1. An arm that can move toward and away from the shoulder of the tire molding drum is rotatably disposed, and a drive gear to which one end of the support shaft of the pressure roller is fixed and a driven gear that meshes with the drive gear are pivotally supported. A frame is slidably mounted on the tip of the arm, the driven gear is engaged with a rack fixed to the tip of the arm, and the arm is rotated toward the shoulder of the tire-building drum. The pressure roller that is in contact with the bonded tire molding material is rotated around the support shaft in the opposite direction to the rotation direction of the tire molding drum, and the pressure roller is rotated around the support shaft in the opposite direction to the rotation direction of the tire molding drum, and the pressure roller is rotated around the support shaft of the main drive gear to the outside of the tire molding drum. The rotation fulcrum of the pressure roller is moved in the axial direction of the rack via the sliding frame by the rack and pinion mechanism, and the rotation and movement speed of the pressure roller is controlled by the back pressure of the frame. A stitcher device for a tire molding machine, characterized in that a stitcher device for a tire molding machine is provided with a rotation and movement control mechanism that regulates rotation and movement through the stitcher device.