JPH07110502B2 - Raw tire positioning method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw tire positioning method for specifying a circumferential position of a raw tire when the raw tire is supplied from a tire receiving stand to a tire vulcanizer.

[0002]

2. Description of the Related Art A raw tire assembled in a molding process is sent to a vulcanization process and vulcanized by a tire vulcanizer.

In this case, the raw tire must be supplied to the tire vulcanizer with a constant circumferential positional relationship for homogenization. Therefore, a tire cradle for delivery is provided in front of the tire vulcanizer, and the raw tire is positioned at a predetermined supply position (hereinafter referred to as vulcanization position) on the tire cradle and then supplied to the tire vulcanizer. I am trying to do it.

On the other hand, as a step before performing the tire vulcanization, it is necessary to perform a test vulcanization for determining the vulcanization position. This test vulcanization is performed by the following procedure and method.

[0005] A plurality of raw tires as a test subject,
The tires are sequentially supplied to the tire vulcanizer while changing their circumferential positions.

For each of these vulcanized tires, radial force variation (RFV) and lateral force variation (L
FV) and other uniformity waveforms are obtained.

The uniformity waveforms for each of the test tires are combined to obtain a composite waveform due to the raw tire factor and a composite waveform due to the vulcanizer factor.

From these two waveforms, the position in the circumferential direction of the tire at which the optimum uniformity is obtained is determined as the vulcanization position.

[0009]

Therefore, at the time of this vulcanization position searching operation, it is necessary to set the test tires on the tire pedestal at the respective predetermined circumferential positions (hereinafter referred to as test vulcanization positions) at the above-mentioned stage.

Conventionally, as a method of positioning a raw tire at the test vulcanization position, some reference mark is set at a specific position in the circumferential direction for each raw tire, and this reference point is used as a reference point on the tire cradle side. Workers place the raw tires on the tire pedestal so that they match.

[0012]

However, according to the conventional method of positioning the raw tires one by one at the predetermined supply position (test vulcanization position) on the pedestal by the operator's hand as described above, The positioning work is very troublesome and inefficient,
Moreover, there is a drawback that the positioning accuracy is poor.

Therefore, the present invention provides a method for positioning a raw tire which allows the raw tire to be set easily and efficiently and accurately at a predetermined test vulcanization position.

[0014]

SUMMARY OF THE INVENTION The present invention is a raw tire positioning method for specifying a circumferential positional relationship of a raw tire with respect to a tire vulcanizer when the raw tire is supplied from a tire cradle to a tire vulcanizer. There is a common circumferential reference point for each raw tire, and the raw tire is placed on the tire pedestal and the tire pedestal is rotated about the vertical axis by the pedestal rotating device, and the detection means Detecting that the reference point has reached the predetermined position in the circumferential direction, the position of the raw tire at this time is set as the reference position, and thereafter, the tire pedestal is moved from the reference position at an angle set in advance for each raw tire. The tire is rotated to set the green tire at a predetermined supply position for the tire vulcanizer.

[0015]

According to this structure, no matter where the raw tire is placed on the tire pedestal during test vulcanization, the raw tire automatically rotates to the test vulcanization position together with the tire pedestal. Set.

That is, there is no need to align the raw tires on the tire pedestal as in the conventional case, and the worker only needs to place the raw tires randomly on the tire pedestal. It is simple, and moreover, this positioning can be performed accurately.

[0017]

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

In FIGS. 1 and 2, the tire pedestal 1 on which the raw tire T is placed is located at the front of the tire vulcanizer 2.
It is rotatably attached to the fixed vertical shaft 3 by a bearing 4 on a horizontal plane.

A spur gear 5 is fixed to the lower surface of the tire pedestal 1, and the spur gear 5 meshes with a pinion 7 driven by an air actuator 6.

In this manner, the spur gear 5, the pinion 7, and the air actuator 6 constitute a pedestal rotation device 8, and the pedestal rotation device 8 drives the tire pedestal 1 to rotate.

In FIG. 1, 9 is an air pipe for the air actuator 6, 10 is a solenoid valve provided in the air pipe 9, and a solenoid 12 of the solenoid valve 10 is controlled by a controller 12 to switch on and off.

On the other hand, the raw tire T has a marker 13 for setting a common reference point at an appropriate position in the circumferential direction of the tread.
Is attached, and a reference point sensor 14 for detecting the marker 13 is provided at a position facing the tire tread.
Is detected (when the marker 13 reaches the position of the reference point sensor 14), this detection signal is sent to the controller 12.

The marker 13 and the reference point sensor 1
As the combination of 4, it is possible to use a light reflection plate and a light reflection type sensor, a plate-shaped conductor and an eddy current sensor, a plate material protruding to the circumferential side of the tread portion and a limit switch contacting this.

The controller 12 is, as shown in FIG.
An arithmetic unit 15, an output unit 16 for the solenoid 11,
It consists of a counter 17 and.

A tire set for detecting the angle setting signal from the rotation angle setting device 18, the signal from the reference point sensor 14, and the fact that the test tire T has been placed on the tire pedestal 1 is provided in the computing unit 15. The signal from the sensor 19 is input,
Based on the tire set signal from the tire set sensor 19, the solenoid valve solenoid 11 is energized from the output section 16 to operate the air actuator 6, and the tire pedestal 1 rotates in the direction of the arrow in FIG.

In the rotation angle setter 18, the angle from the reference position (the position where the marker 13 reaches the reference point sensor 14) for each test tire is, for example, 45 ° (first), 9 °
0 ° (second line), 135 ° (third line), etc. are set at fixed angle intervals, and this set angle is set as the rotation amount of the tire pedestal 1 (energization time to the solenoid valve solenoid 11) to the calculation unit 15. Remembered.

Each time a test tire is placed on the tire cradle 1, it is first rotated and moved to a common reference position. That is, when the marker 13 is displaced from the reference point sensor 14 to the angle position of θ as shown by the phantom line in FIG.
, The tire T rotates with the pedestal 1 by this angle θ.

When the reference point sensor 14 detects that the reference position has been reached, the calculation unit 15 of the controller 12 starts the timekeeping operation using this detection signal as a trigger, and preset for each test tire. The rotation of the tire pedestal 1 is stopped when the energization time (= rotation angle) of the solenoid valve solenoid 11 is completed.

Each time the rotation of the tire cradle 1 is stopped, a count-up signal is sent from the counter 17 to the calculator 15 to read the set angle stored for the next test tire, and Prepare for position setting.

In this way, each test tire can be automatically set to each test vulcanization position.

By the way, as a modified example of the above-mentioned embodiment, the tread of the raw tire or the step portion of the joint portion in the sidewall may be used as the reference point for detection by the sensor.

Also, a marker printed with a bar code containing rotation angle information for each tire is attached to the test tire, the bar code information is read by a reference point sensor, and the rotation amount is calculated by the calculation unit 15 of the controller 12. You may make it calculate.

Further, in the above-described embodiment, the tire set sensor 19 detects that the test tire T is placed on the tire pedestal 1, and the rotation of the pedestal 1 is started. An automatic return type start switch that is manually operated is provided, and when the raw tire T is placed on the tire cradle 1 and the start switch is turned on, the rotation of the tire cradle 1 is started. You may comprise.

[0034]

As described above, according to the present invention, the tire pedestal is rotated about the vertical axis by the pedestal rotating device while the raw tire is placed on the tire pedestal, and each raw material is detected by the detecting means. The common circumferential reference point set on the tires is detected, and the position of the raw tire at this time is set as the reference position, and the tire pedestal is rotated from this reference position at an angle set in advance for each raw tire. As a result, the raw tire is set at a predetermined supply position (test vulcanization position) for the tire vulcanizer, so that the raw tire can be tested no matter where it is placed on the tire pedestal. Can be automatically set to the vulcanization position.

That is, there is no need to align the raw tires on the tire pedestal as in the conventional case, and the worker only needs to place the raw tires randomly on the tire pedestal, so that the raw tire positioning work can be performed. It is very simple and the positioning can be done accurately.

[Brief description of drawings]

FIG. 1 is a diagram showing a device configuration for carrying out a raw tire positioning method according to an embodiment of the present invention.

FIG. 2 is a plan view of the device.

FIG. 3 is a block diagram showing a configuration of an apparatus.

[Explanation of symbols]

 1 tire cradle 2 tire vulcanizer 3 vertical axis that is the center of rotation of the tire cradle 5 spur gear that constitutes the cradle rotating device 7 same pinion 6 the same air actuator 12 controller that controls the cradle rotating device 13 Marker for setting reference position 14 Reference point sensor

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Claims (1)

[Claims] 1. A method for positioning a raw tire for specifying a circumferential positional relationship of the raw tire with respect to the tire vulcanizer when the raw tire is supplied from a tire cradle to a tire vulcanizer, which is common to all the raw tires. peripheral Hajime Mukai set the quasi-point, the raw data <br/> tire is rotated about a vertical axis tire bearing the pedestal rotating device in a state of being placed on the tire bearing, the reference by detecting means Detecting that the point has reached a predetermined position in the circumferential direction, the position of the raw tire at this time is taken as the reference position, and
After that, the tire pedestal at the angle set in advance for each raw tire
To rotate the green tire from the above reference position
Raw tire positioning method which is characterized that you set to a predetermined supply position with respect to.