JPH07106609B2 - Tire sorting method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tire sorting method, and more specifically, in a tire trim machine, a general tire and a tire having a convex portion on a shoulder portion (studless tire) are provided. The present invention relates to a tire sorting method that can be accurately and quickly determined.

[Prior art]

Conventionally, in a tire trim machine, a trimming operation is performed by discriminating whether it is a general tire or a snow tire.

As such a determination method, for example, as shown in FIG. 3, the shoulder portion 1 is provided diagonally above the tire shoulder portion 1.
A roller 2 that comes into contact with and a transmissive photoelectric tube 4 that detects the convex portions 3 (blocks) provided on the shoulder portion 1 are provided at both ends thereof.

Then, the trimming work is performed after it is determined by such detecting means whether the tire is a snow tire having the convex portion 3 on the shoulder portion 1 or a general tire.

However, recent snow tires (studless tires)
Is designed so that the shoulder portion 1 does not have the convex portion 3 (block), it is extremely difficult to determine whether it is a snow tire or a general tire.
Therefore, there is a fear that the convex portion 3 of the shoulder portion 1 may be cut by the trim machine even though it is a snow tire.

[Object of the Invention]

The present invention has been devised in view of such conventional problems, and the purpose thereof is to accurately determine whether the tire is a general tire or a tire having a convex portion on the shoulder portion, and trim. (EN) Provided is a tire sorting method which effectively prevents a malfunction in a machine.

[Structure of Invention]

According to the present invention, in order to achieve the above object, a roller provided at the tip of a swingable lever provided with a protrusion that comes into contact with the detector side is brought into contact with the shoulder portion of a tire that is rotatably supported. When the tire is turned with, the lever swings up and down via the roller along the uneven part provided on the shoulder part, and this is received by the detection body equipped with the strain gauge and detected, and this detected value Is converted into an electric resistance and output, and an average waveform per unit time is obtained by an amplifier, a clock for setting a unit time, a waveform sampling device, and a waveform arithmetic device, and a waveform of a general tire is set in advance. By comparing and calculating the average waveform and the preset waveform of a general tire with a setter and a comparison calculation device, it is possible to determine whether the tire type is a normal tire or not. Accurately and quickly determine whether or not the tire has a convex portion on the holder, effectively prevent malfunction in the trim machine, and enable efficient tire sorting work. What is done is the gist.

Example of Invention

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic configuration diagram of a tire sorting apparatus according to the present invention, and FIG. 2 is a partially enlarged perspective view of a tire shoulder portion.

In FIG. 2, the shoulder portion of the studless tire 10
The convex portions 12 (side blocks) are provided at 11 at regular intervals.

And in this invention, the convex portion provided on the shoulder portion 11
This is a method of comparing the size of 12 with the convex portion of the shoulder portion of a general tire to determine whether the tire is a studless tire 10 or a general tire.

In FIG. 1, the tire shoulder 11 is brought into contact with the swingable detection means 14 with the hinge 13 as a fulcrum.

The detection means 14 is composed of a lever 17 having a roller 15 which comes into contact with the tire shoulder portion 11 at the front end and a protrusion 16 which comes into contact with the detector 18 side at the rear end and whose length is adjustable. Since the side block generally has a low unevenness, the length is adjusted to the weight of the lever so that the lever resonates with the unevenness. Further, it is desirable that the roller has a diameter of 10 mm or more so as not to be scratched in the recess of a general tire.

The detector 18 is cantilevered by a strain gauge 19 via a leaf spring member 18a.

The rear end of the lever 16, the detector 18 and the strain gauge 19 are housed in a case 20, and the strain gauge
19 is connected to a control device 21 for discriminating a tire.

The control device 21 is an amplifier 22 that amplifies and outputs the electric resistance from the strain gauge 19, a clock 23 that sets a unit time, a waveform processing device 24 that is called a waveform sampling device, and a waveform of a unit time. An average waveform processing device 25, which is a waveform calculation device that averages amplitude, a setter 26 that sets the waveform of a general tire in advance, and a comparison calculation device that compares and calculates the waveform of a general tire. And a studless tire 10 based on the compared data, and outputs the result. The amplitude of the unit time waveform is averaged in order to distinguish it from the side block and the protrusions such as the tire slip sign or the vent group.

Next, a tire sorting method will be described. To the shoulder portion 11 of the tire rotatably supported, the roller 15 of the swingable detection means 14 is brought into contact, and the uneven portion provided on the shoulder portion 11 while rotating the tire in this state, the detection means 14, While detecting with the detector 18 and the strain gauge 19, this detection value is converted into an electric resistance and output,
And an amplifier 22, a clock 23 for setting a unit time,
The waveform processing device 24 and the average waveform processing device 25 determine the average waveform of the electric resistance per unit time, and the setting device 26 and the computing device 27 in which the waveform of the general tire is set in advance are preset as the average waveform. The tire type is discriminated by comparison with the waveform of a general tire.

According to such a method, for example, even in the case of a tire having a convex portion on the shoulder portion, it is possible to accurately and quickly determine whether it is a general tire or a snow tire from the averaged waveform of the convex portion, and in a trim machine. It is effective as a trim trim cutting measure.

〔The invention's effect〕

According to the present invention, the shoulder portion of the tire rotatably supported as described above is brought into contact with the roller provided at the tip of the swingable lever provided with the protrusion that comes into contact with the detector side. When it is turned, the lever swings up and down via the roller along the uneven part provided on the shoulder part, and this is received by the detection body equipped with a strain gauge and detected, and this detection value is also measured by the electrical resistance. Then, the amplifier, the clock that sets the unit time, the waveform sampling device, and the waveform calculation device determine the average waveform per unit time, and the setter that sets the waveform of the general tire in advance. By comparing and calculating the average waveform and the preset waveform of a general tire with a comparison calculation device, the tire type is classified according to the type of the tire. Exactly whether the tire having a convex portion, yet rapidly to determine, as to effectively prevent the erroneous operation in the trim machine, there is an effect that it is possible to efficiently perform tire sorting work.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a tire sorting device embodying the present invention, FIG. 2 is an enlarged perspective view of a tire shoulder portion, and FIG.
The figure is a schematic configuration diagram of a conventional tire identification method. 10 ... Studless tire, 11 ... Shoulder part, 12 ... Convex part (side block), 14 ... Detection means, 18 ... Detector, 19 ...
Strain gauge, 21 ... Control device.

Claims (1)

[Claims] 1. A roller provided at the tip of a swingable lever having a protrusion for contacting the detector side is brought into contact with the shoulder portion of a tire rotatably supported, and the tire is turned in this state. The lever swings up and down via the roller along the uneven part provided on the shoulder part, and this is received by the detection body provided with the strain gauge to detect it, and this detected value is converted into electric resistance. The average waveform per unit time is obtained by the amplifier, the clock for setting the unit time, the waveform sampling device, and the waveform calculation device, and the setting device and the comparison calculation device in which the waveform of the general tire is set in advance The tire sorting method is characterized in that the type of the tire is sorted and classified by comparing and calculating the average waveform and the waveform of a general tire set in advance.