SU599991A1 - Device for centering tyre tread blanks - Google Patents

Description

one

The invention relates to the equipment of the tire industry and is intended for feeding and centering a tread on the drum of an assembly machine when assembling the tire covers. A device for centering the tread is known, comprising a feed conveyor made in the form of two rows of bearing rollers at an angle to the central longitudinal axis of the conveyor 1.

This device provides sufficiently accurate centering only when the tread is linearly moving along a conveyor with a considerable length of the tread. With a small length of conveyor equal to the length of the tread, the centering of the tread is not provided.

It is also known a device for centering a protector, including its roller conveyor with supporting rollers, through which the trochector moves, guiding pinch rollers located above the conveyor and abutting against the lateral surfaces of the projecting running portion of the protector, and a system of follower blocks 2.

These rollers only fpsi the previously detected protector in a predetermined position. When iodacuring protectors on the drum, in which the running part is not clearly defined, this device does not provide reliable centering.

The purpose of the invention is to create a centering device, which makes it possible to increase the accuracy of the centering of the measured preform protectors.

This and, when achieved, is achieved by the fact that the conveyor belt contains centering rollers, individually equipped with axial movement drives, and centering side rails with a drive of their approach through a system of levers connected with a follower system.

FIG. Figure 1 shows a device for centering the tread, tread from the top; on fng. 2 is a view along arrow A in FIG. one; in fig. 3 is a section BB in FIG. one.

The device for centering the tread includes a frame 1 on which are mounted, alternating, centering 2 and supporting 3 rollers. The rollers 3 have the possibility of free rotation and displacement along the axes 4 and are held in the center position by the springs 5.

Claims (2)

Each centering roller 2 has the possibility of free rotation along the feed of the sacrificial billet and through the overrunning clutch 6 by means of a key 7 is connected to the shaft 8 having a forced rotation from the drive 9 through chain drives 10 and 11 and sprockets 12 and 13. In addition, roller 2 has the ability movement along the shaft 8, and this movement can be carried out for each of the rollers 2 independently of each other by means of hydraulic cylinders 14 connected to the rollers 2 by levers 15. Above the centering rollers 2 are mounted pressure rollers 16, which can They move along the axis 17 and are held in the central position by springs 18. The axes 17 are mounted on rails 19, fitted with springs 20 and capable of vertically moving in the frame brackets 21. The frame 21 can be moved up and down through the pneumatic cylinder 22 along inclined guides 23, which are attached to the frame 1. On the frame 1 with the possibility of movement along the guides 24, the centering strips 25 and 26 are installed. Their movement towards each other with equal speed is carried out using pivotally connected levers 27 and 28 and a hydraulic cylinder Section 29. The following blocks 30 are located on each bar 25 and 26, consisting of a contactless limit switch 31 and a hinged pin 32, equipped with a flag 33 and held in a vertical position by a spring 34. For end positioning of the tread on the conveyor, there is a limit switch 35. The centering of the tread is as follows. The tread is iodine centering rollers 2, which, rotating from the drive 9 through sprockets 12 and 13, chain drives 10 and I, shafts 8, pins 7 and overrunning clutches 6, move the protector in the direction of the assembly drum. As it moves, the protector presses the limit switch 35, as a result of which the actuator 9 is turned off and the hydraulic cylinder 29 and pneumatic cylinder 22 are turned on. The frame 21 of the pneumatic cylinder 22 is inclined downward along the inclined guides 23. The rollers 16 press the protector against the centering rollers 2 through the guides 1U, the springs 20 and the axes 17. At the same time, the strips 25 and 26 from the hydraulic cylinder 29 through the levers 27 and 28 begin to approach each other at a slightly equal speed. The rod 32, when moving the laths 25 and 26, abuts the tread edge, rotates around an axis and inserts the flag 33 into the groove of the end switch 31, the signal of which includes the hydraulic cylinders 14, the mixing rollers 2 with the tread in the axial direction with a speed exceeding the speed of the slats 25 and 26. At the same time, the rollers and pinch rollers 16 move with the centering rollers 2 along the axis. After coming out of contact with the tread, the rod 32 undergoes a vertical position under the action of the spring 34, while the flacon 33 comes out of the groove off A boom 31 that coordinates off the hydraulic cylinders 14, and the centering rollers 2 are stopped. As the strips 25 and 26 move further together, the rod 32 acts in the manner described above on the switch 31, the hydraulic cylinders 14 are turned on again and the rollers 2 with the tread are moved to the central position. This happens until the following blocks located to the left and right simultaneously operate, while the 33 left and right rods 32 enter the slots of the limit switches 31 and give a signal to stop the hydraulic cylinder 14 and turn on the hydraulic cylinder 29 to dilute the slats. This means the end of the centering — the tread is strictly in the center of the drum. When the drive 9 is turned on, the protector is fed to the drum, on which it is applied when the drive is turned off. Since each centering roller 2 has an individual axial displacement drive, centering is performed along the entire length of the workpiece and allows it to be precisely positioned relative to the center of the assembly drum. In this case, the centering process is carried out automatically while other manufacturing operations are performed on the assembly machine. An apparatus for centering tread blanks, comprising a feed conveyor, pressure rollers located above it and a tracking system, characterized in that, in order to improve centering accuracy, the conveyor comprises centering rollers provided with individual drives for their axial movement and centering side bars with They are brought together through a leverage system associated with a tracking system. Sources of information taken into account during the examination 1. USSR author's certificate No. 355042, cl. B 29H 17/10, 1970. 2. US patent number 3413174, cl. 156-405, 1971. : p | "dcrIfiHM YU 35 3 nineteen 20/7 W 8 i I ( h-h-- - i-j