JPH0369657B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a tire finishing method and an apparatus thereof, and more specifically, to a method for automatically removing spews, burrs, etc. derived from the outer peripheral surface of a tire after vulcanization molding. The present invention relates to a tire finishing method and apparatus for detecting and automatically cutting and removing tires using a cutter device.

[Prior art]

Conventionally, methods and devices for automatically cutting and removing spills, burrs, etc. derived from the surface of tires after vulcanization molding are disclosed, for example, in Japanese Patent Publication No. 38-7220, Japanese Patent Publication No. 51-20553, and Japanese Patent Publication No. 51-20553. Publication No. 53-9634, JP-A-51-133058, JP-A-54-
Publication No. 126569, Special Publication No. 56-6857, Special Publication No. 1983
−13512 Publication, Special Publication No. 53-1542, Jitsukasho
Various proposals have been made, such as in Publication No. 51-107868.

That is, in conventional tire finishing equipment, the tire is rotated by driving one of at least three support rollers that contact and support the tread of the tire, and the rotating tire The comb-shaped knife of the cutter device is pressed against the cross-sectional contour of the tire using a counter balance or an air cylinder to automatically cut and remove spills, burrs, etc. derived from the tire surface.

However, the knife of the above-mentioned cutter device has a fixed operating order within a preset range, and is mechanically limited to a fixed operating range. Therefore, for a wide variety of tire sizes,
It was extremely difficult to use machines that operated in the same way.

In particular, if the same machine is used to finish snow tires with sharp ridgeline design on the tire shoulder, or letter tires with high protrusions on the side of the tire, there may be serious damage to the surface of the tire. There were problems such as cutting damage and poor finishing.

Therefore, in the case of conventional equipment, it is not possible to produce a mixture of general tires and special tires, etc., and when producing a wide variety of tires, it is necessary to install multiple finishing machines tailored to the tires. There was a problem in that productivity was extremely low because it was necessary to make changes and make adjustments in accordance with the production plan.

[Purpose of the invention]

This invention was devised in view of these conventional problems, and uses a single machine to detect tire block patterns, detect letter tires, detect tire spill-derived positions, and detect abnormal tire runout. In addition to automatically distinguishing between various types of tires, the system automatically and efficiently finishes the tires while controlling the operation of the cutting device according to the type of tire, and installs a wide variety of finishing machines. It is an object of the present invention to provide a tire finishing device that can perform finishing work efficiently in a narrower space than conventional ones without causing problems, and can improve productivity.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a rotatable drive shaft equipped with an inflation mechanism and a driven shaft that can rotate and move up and down on the axis of the drive shaft, and the drive shaft and Divided wide rims in the tire width direction that fit and hold the transported tire are respectively attached to the shaft ends facing opposite to the driven shaft, and the machine near the outer circumferential surface of the tire that is fitted and held by the rims is attached. The frame includes a block pattern detector that detects tire block patterns, a letter detector that detects letter tires, a spill derived position detector that detects the tire spill derived position, and a tire that detects abnormal tire runout. A detection device consisting of an outer diameter detection means is installed so as to be able to be press-contacted, and a cutter device is provided to automatically finish off spills, burrs, etc. that are generated after the tire is vulcanized and molded. A tire type determination device is provided for determining the tire type based on the detection signals output from the block pattern detector, the letter detector, and the spill derived position detector, and The gist of the present invention is that the operation of each of the cutter devices is selected and controlled based on the above.

[Action of the invention]

This invention is configured as described above, and after a transported tire is held between two rims that are wide in the width direction of the tire and can be rotated and moved toward and away from the machine frame, the tire is inflated. , by pressing a block pattern detector, a letter detector, a spill derived position detector, and a tire outer diameter detecting means arranged near the outer peripheral surface of the tire while the inflated tire is being driven to rotate. Block putter of each tire, letter tire,
The tire spill derived position and the tire abnormal runout are respectively detected, the detected values are output to a tire type determination device to determine the tire type, and the tire type is determined based on the tire type signal from the tire type determination device. Then, the operation of the cutter device is selected and determined according to the type of tire, and the spews and burrs on the outer circumferential surface of the tire that are generated after the tire is vulcanized and molded are automatically cut off to finish the tire. It is possible to automatically detect spills, burrs, etc. that develop on the outer circumferential surface of the tire after molding, and automatically cut and remove them using a cutting device.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the accompanying drawings.

1 and 2 show a front view and a side view of a tire finishing device 10 embodying the present invention.
A tire supply device 40 including a centering device 30 and the like is installed.

Machine frame 11 of the tire finishing device 10
a tire support device 100 that rotatably fits and inflates the vulcanized and molded tire W conveyed from the tire supply device 40;
It is composed of a detection device 200 that detects the type, outer diameter, spills, burrs, etc. of the tire W, and a cutting device 300 that cuts and removes the spills, burrs, etc. derived from the side and tread portions of the tire W. The detection device 200 is provided outside the frame 11.
A tire type determiner 400 is provided to determine the type of tire W based on a detection signal from the tire W.

The tire support device 100 is shown in FIGS.
As shown in the figure, a drive shaft 130 and a driven shaft 140 each having a hollow cylindrical upper rim 110 and a lower rim 120 that are divided into two are arranged in a straight line on the upper frame 12 and lower frame 13 of the machine frame 11. installed on.

The drive shaft 130 has a hollow cylindrical case 132 inside a guide member 14 provided in the upper frame 12.
The bearing member 13 is screwed into the case 132 so that its position can be adjusted freely.
A center shaft 135 whose upper and lower parts are rotatably supported via 4a and 134b is provided.

At the upper end of the center shaft 135, the upper frame 1
The upper rim 110 is connected to the drive motor 150 installed on the center shaft 135 via sprockets 151, 152 and a chain 135a, and the upper rim 110 is attached to the lower end of the center shaft 135 via a rim holder 136.

Further, an air supply passage 137 that constitutes a tire inflation mechanism is formed in the center of the center shaft 135, and the tip of this air supply passage 137 opens at the center of the upper rim 110, and the rear end is not shown. Connected to an air supply via a rotary joint.

In addition, a driven shaft 14 supported by the lower frame 13
0, a support plate 143 is attached to the tip of a rod 142 of an air cylinder 141 attached to a lower frame 13, and a rim holder 145 to which a lower rim 120 is attached via a bearing member 144 is mounted on this support plate 143. It is rotatably mounted.

A guide plate 146 that guides the lower surface side of the tire W is attached to the upper end of the lower rim 120,
A plurality of ball casters 147 are rotatably installed in this guide plate 146. Support plate 1 attached to the tip of the rod 142
A plurality of guide rods 149 (three in this embodiment) and rotation stopper rods 149a are vertically provided on the lower surface of the lower frame 13, passing through guide holes 148 provided in the lower frame 13. Furthermore, a positioning means 160 for regulating the lower limit of the lower rim 120 is installed on the side of the support plate 143.

The positioning means 160 is an air cylinder 161
and a stopper plate 163 attached to the tip of the rod 162 of this air cylinder 161. When inflating the tire W fitted and held by the upper and lower rims 110 and 120, the lower rim 120 is kept constant. The structure is such that the upper and lower rims 110, 120 are spaced widely apart from each other so as not to fall below a certain position.

Next, to explain the operation of the tire support device 100, the tire W after vulcanization and molding is transported from the transport conveyor 20 of the tire supply device 40.
is supplied one by one onto the lower rim 120 of the tire support device 100 at an arbitrary position. and lower rim 1
20, the air cylinder 141 is extended and the driven shaft 140 is raised.
The lower rim 120 supported on the support plate 143 via the rim holder 145 and the upper rim 110 divided into two are fitted and held together, and the upper and lower rims 1
Position the tire W so that it is aligned with the center of the axes 10 and 120.

At this time, the guide rod 149 vertically installed on the lower surface of the support plate 143 comes out of the guide hole 148 provided in the lower frame 13 upwardly, and at the same time, the air cylinder 161 of the positioning means 160
is extended and the guide hole 148 provided in the lower frame 13 is closed by the stopper plate 163.

In such a state, when air X is supplied into the inside of the tire W from the air supply passage 137 constituting the tire inflation mechanism to inflate the tire W, the driven shaft 14 supported by the air cylinder 141
0 fits and holds the lower surface of the tire W by inflation of the tire W, and the upper and lower rims 110,
The guide rod 149 slowly slides down at a predetermined interval, and stops when the lower end of the guide rod 149 comes into contact with the stopper plate 163.

Although the driven shaft 140 is pushed back downward by the inflation of the tire W, the air cylinder 141 holding the driven shaft 140 maintains sufficient supporting force against the axial thrust caused by the inflation of the tire W. Therefore, it does not fall suddenly.

By setting the gap between the upper and lower rims to be wider when inflating the tire W as described above, for example, the upper and lower rims 11 in the state shown in FIG.
0,120, the sidewall portion W3 of the tire W now forms a plane in the radial direction of the tire W, as shown by the dashed line in FIG. The Spiyu S that was derived from the sidewall part W3 of the upper rim 11
The cutter device 30, which will be described later, without being disturbed by
It can be easily cut and finished using a No. 0 knife 310.

As described above, when the inflation of the tire W is completed, the drive motor 150 installed on the upper frame 12 is driven, and this rotational driving force is transmitted to the center shaft of the drive shaft 130 via the sprockets 151, 152 and the chain 135. 135, and rotates the tire W, which is fitted and held on the upper and lower rims 110, 120, at a predetermined rotational speed.

Next, the detection device 200 for detecting the type, outer diameter, spill, burr, etc. of the tire W is shown in FIGS.
As shown in FIG. 11, a block pattern detector 201 detects a tire block pattern;
a letter detector 202 that detects letter tires;
A spew derivation position detector 203 and tire outer diameter detection means 20 that detect the spew derivation position of the tire.
It is composed of 4. The block pattern detector 201 detects the shoulder portion W2 of the tire W.
This detector quickly determines the type of tire W by detecting a recess P formed in the tire W, and is constructed as shown in FIGS. 6, 8, and 9. That is, the block pattern detector 201 includes a light beam projector 211 and a light receiver 212.
A recess detector 210 is arranged facing each other at a predetermined interval, and a light beam 211a outputted from a light beam projector 211 of the recess detector 210 detects the shoulder portion W2 of the tire W at a certain position.
a detector setting device 220 for setting the recess detector 210 so as to pass through a recess P formed in the recess P;
This block pattern detector 2
01 is installed in the vicinity of the tire support device 100 so as to be able to approach and leave and move up and down. Further, the recess detector 210 is electrically connected to a tire type detector 230 shown in FIG.

In the embodiment of the present invention, the concave portion detector 210 uses a narrow-field photoelectric switch, and the light beam 211a outputted from the light beam projector 211 toward the light receiver 212 is transmitted to the shoulder portion W2 of the tire W. Only when the light passes through the recesses P formed at intervals and reaches the light receiver 212, it can be converted into an electrical signal and output to the tire type determination device 230.

Therefore, the tire W is attached to the tire support device 100.
When the tire W is rotated by attaching it to the tire W, the number of recesses P formed in the shoulder part W2 of the tire W is
This can be detected by a count circuit 231 provided in the tire type determiner 230.

Note that the light beam 211a output from the light beam projector 211 may be a normal visible light beam or a laser beam.

Next, the above-described detector setting device 220 includes a roll mounting body 221 having a substantially U-shaped cross section.
And, the left and right arms 22 of this roll attachment body 221
A positioning roll 222 rotatably supported between 1a and 221b, and this positioning roll 222
The position of the roll mounting body 2 with respect to the tire W
21, an air cylinder 224 that is adjusted via an angle adjustment rod 223, and this detector setting device 220 is attached to a rod 226 of an air cylinder 225 arranged parallel to the machine frame 11. The positioning roll 222 is configured so that the angle of contact with the tire shoulder portion W2 can be freely adjusted.

As shown in the figure, a light beam projector 211 of the recess detector 210 is attached to each of the left and right arms 221a, 221b of the roll attachment body 221 described above.
and the light receiver 212 are parallel to the positioning roll 222, that is, the light beam 211a output from the light beam projector 211 toward the light receiver 212.
are respectively attached so as to be parallel to the tire side surface of the positioning roll 222. Further, each mounting position allows the light beam 211a to pass through a recess P formed in the shoulder portion W2 of the tire W.

Therefore, by bringing the positioning roll 222 of the detector setting device 220 into contact with a predetermined position of the shoulder portion W2 of the tire W at a predetermined angle θ, the light beam 211a output from the light beam projector 211 of the recess detector 210 can be adjusted. This allows the tire W to pass through the recess P formed in the shoulder portion W2 of the tire W at a constant position.

Further, as shown in FIG. 9, the tire type determiner 230 includes a count circuit 231 that integrates and counts the electrical signals sent from the recess detector 210, and a shoulder portion that is pre-corresponding to the type of tire W. A setting circuit 232 that can set the number of recesses P of W2, and a comparison judgment circuit 233 that compares the counting signal from the counting circuit 231 and the set value set in the setting circuit 232 to determine the type of tire W. and a determination signal circuit 234 that outputs a determination signal based on the determination by the comparison determination circuit 233.
The above-mentioned recess detector 21
The type of the tire W is determined based on the detection signal of the recess P formed in the shoulder portion W2 of the tire W by 0, and this determination signal is output to the tire type determiner 400 in the next step. .

Next, a method for determining the type of tire W using the block pattern detector 201 will be described.

First, the detector setting device 220 of the block pattern detector 201 is operated on the tire W rotatably supported by the tire support device 100.
Recess P formed in shoulder portion W2 of tire W
is set so that the light beam 211a output from the light beam projector 211 of the recess detector 210 passes through the light beam 211a at a certain position. Then, from this state, the tire support device 100 is operated to rotate the tire W at a predetermined speed, and the concave portion detector 210 and the tire type detector 230 are energized to start their operation. Then, from the light beam emitter 211 of the recess detector 210 to the light receiver 212
The light beam 211a output toward the tire W
Only when the tire passes through the recesses P formed at intervals in the shoulder portion W2 of the tire and reaches the light receiver 212, it is converted into an electric signal (pulse), that is, the recess detection signal is output to the tire type determination device 230. Ru.

The recess detection signal is transmitted to the tire type determiner 230.
The number of recesses P that have appeared within a predetermined time is accumulated by the counting circuit 231 in the inner part, and is transmitted to the comparison and determination circuit 233, where the recesses of the tire to be determined are set in advance in the setting circuit 232. The type of tire W compared with the information is determined.

This determination information is then sent to the determination signal circuit 234, from which it is output as a determination signal to the tire type determiner 400.

Next, the letter detector 202 for detecting the letter tire detects the so-called letter LT, which is formed on the sidewall portion W3 of the tire W and indicates the tire type, manufacturer, etc., using an alpha alphabet and a number.
It is configured as follows.

That is, the letter detector 202 is
As shown in FIGS. 0 to 13, a roller 241 is supported by a bracket 242 and rotatably provided at the tip of the tire W on the sidewall portion W3 side, and this bracket 242 slides inside a guide housing 243. Two moving guide shafts 244
It is possible to move up and down through the . The guide housing 243 is attached to a main body casing 245 of the letter detector 202, and inside the main body casing 245 there is also a housing connected to the bracket 242 via a floating connector 246 to control the movement of the drive shaft 247. An air cylinder 248 is provided.

Further, the guide shaft 244 and the guide housing 243 can easily slide in the axial direction by a bearing 249 provided therebetween, but are firmly supported in directions other than the axial direction so that they do not swing. 250 is a bellows for dustproofing.

In the present invention, an acceleration sensor 251 is attached to the bracket 242 of the letter detector 202 configured as described above. This acceleration sensor 251
For example, a piezoelectric element type sensor can be used, and the vertical vibration of the bracket 242 is detected as acceleration.

Therefore, the tire W is attached to the tire support device 100.
Then, high pressure air is sent to the air cylinder 248 shown in FIG. When pressed against the portion W3, the rotation of the tire W causes this roller 24 to
1 also rotates. Each time the letter LT provided on the sidewall W3 of the tire shown in FIG. 10 passes the rotating roller 241, the acceleration sensor 251 installed on the bracket 242 outputs a detection signal.

The letter detector 202 detects the letter height of the tire W as the magnitude of the acceleration signal.

FIG. 12 is a block diagram showing an embodiment of the signal processing process for using the acceleration signal A extracted as described above in the actual tire manufacturing process.

In this embodiment, an amplifier 252 is connected to the acceleration sensor 251 to amplify the signal by about 10 times, and then the mechanical noise is removed from the acceleration signal A by passing it through a low-pass filter 253.
In order to correct the signal output attenuated in step 53, the signal is further amplified by about 10 times in amplifier 254. Next, the signal is integrated using the integrator 255, and the acceleration signal A
is converted into a speed signal V.

Then, this speed signal V is input to a comparator 256 and compared with a reference signal R from a setting device 257 connected to another input terminal of this comparator 256. For example, this comparator 256 outputs a signal H when the speed signal V is larger than the reference signal R, and outputs a signal L when the speed signal V is smaller than the reference signal R.
It functions to output .

In this embodiment, the H or L signal output from the comparator 256 is branched into two branches, one of which is input to a tire type determiner 400, which will be described later, and the other is input to a display device equipped with an indicator such as a lamp. 258. This display device 258 may be configured so that, for example, when an H signal is input from the comparator 256, the display is turned on, and when an L signal is input, the display is not turned on.

In the letter detector 202, the setting device 25 converts the acceleration signal A into the speed signal V.
This is to facilitate comparison with the reference signal R from No. 7, and it is of course possible to select a tire W with a high letter height based only on the acceleration signal A.
In the case of the above embodiment, as the setting device 257, for example, a potentiometer made of a variable resistor can be used, and the speed signal is outputted by various letters whose heights are known and determined experimentally in advance. The output level of the setter 257 can be determined based on the value, taking into account the variation in letter height.

Furthermore, if there are several types of tire letter heights and it is desired to select them, it is possible to do so by preparing as many setters and comparators as desired. That is, by using the tire letter height detection method according to the present invention, the tire letter height can be extracted as an acceleration signal according to the letter height, and this signal can be used for various types of tire selection.

In addition, the letters LT, such as design letters and numbers, of the tire W are arranged in an appropriate size and pitch for the design, and are usually about 20 to 30 letters per circumference of the tire surface. Therefore, if the rotational speed of the tire W is about 4 rotations per second (4Hz),
The frequency of the acceleration signal generated in the sensor by the letter LT is approximately 80 to 120 Hz.

On the other hand, the mechanical systems such as the tire support device 100 and the letter detector 202 have sufficiently increased strength and rigidity, so the frequency of vibrations generated in the mechanical systems is higher than an octave, so the noise signals from the mechanical systems are low-pass. It can be removed by filter 252.

In this way, by extracting only the acceleration signal detected by the sensor and integrating the signal for one rotation of the tire or more, it is possible to capture the acceleration signal due to the letter LT with greater emphasis.

Therefore, according to the method of the present invention, it is possible to accurately determine and select tires that have a bulge of a predetermined height based on letters such as letters or designs.

Next, the tire W spill derived position detector 20
3 and tire outer diameter detection means 204 are for detecting spills, burrs, etc. derived from the outer peripheral surface of the tire after vulcanization molding, and are configured as shown in FIGS. 6 and 7. .

That is, the spill derived position detector 203 and the tire outer diameter detection means 204 are connected to the support plate 260.
a, 260b, each support plate 260a has a nut 2 fixed to its upper surface.
61 is the upper frame 12 of the machine frame 11
The two guide shafts 262 are slidably screwed into a ball screw 262 arranged parallel to the
a through a bearing member 262b in a slidable manner.

Both ends of the ball screw 262 are rotatably supported by the upper frame 12 via a bracket 263 and bearing members, and a rod 265 of an air cylinder 264 installed horizontally on the upper frame 12 is attached to one end of the support plate 260b. is connected to.

The ball screw 262 is attached to the upper frame 1.
Drive motor 266 and pulley 26 installed on 2
7a, 267b and a timing belt 268, and by the rotation of the drive motor 266, the spew-derived position detector 203 supported by the support plate 260a moves along the ball screw 262 and the guide shaft 262a.

The spill derived position detector 203 supported by the support plate 260a is connected to an air cylinder 270.
and a spill detector 271 attached to the tip of the rod 270a of this air cylinder 270. The spill detector 271 is a contact type detector (vibration sensor) that is activated by the collision of the spill S derived from the sidewall portion W3. , microswitch, etc.), and its specific configuration is exactly the same as that of the letter detector 202 explained in FIGS. 10 and 11, so the same reference numerals are given and the explanation will be omitted.

Further, the tire outer diameter detection means 204 supported by the support plate 260b is connected to the air cylinder 272.
And a bracket 274 is attached to the tip of this rod 273.
A rotary roller 27 is rotatably mounted through the rotary roller 27.
5, and this rotating roller 275 is rotatably pressed against the surface of the tire W and rotates.

A detector 276 that defines the shoulder portion W2 of the tire W is attached to the lower part of the support plate 260b, and the detector 276 is located a predetermined distance away from the tire outer diameter detection means 204 toward the bead side of the tire W. It is installed in This detector 2
76 is generally 20mm from the tire outer diameter position within the range where the shoulder part W2 design is engraved.
~30mm It is set at a position on the tire bead side.

Note that 277, 278, and 279 are the rod 270a of the air cylinder 270 and the air cylinder 272.
This is a dustproof cover that covers the rod 273 of the air cylinder 264 and the rod 265 of the air cylinder 264.

Next, the operation of the spew derived position detector 203 of the tire W and the tire outer diameter detection means 204 will be explained.

First, the upper and lower rims 11 of the tire support device 100
The rotating roller 2 of the tire outer diameter detecting means 204 which defines the tire outer diameter position is attached to the tire W which is fitted to the tire W which is rotated while being inflated.
75 is pressed into contact with the air cylinder 272 by operating the air cylinder 272. Next, the drive motor 26 connects the spill derived position detector 203, which is disposed coaxially with the ball screw 262 on which the tire outer diameter detection means 204 is supported.
6, it is moved from a position on the bead side of the tire and stopped at a position on the outer diameter of the tire. Then, the air cylinder 270 constituting the spill derived position detector 203 is activated to detect the spill detector 2 attached to the tip of the rod 270a.
71 rollers are brought into pressure contact. From this state, the air cylinder 264 is operated to move the spill detector 271 to the tire bead side, and the tire W
When the first spill S derived from the outer peripheral surface of the tire is detected, this detected value is input to a tire type determination device 400, which will be described later. Then, the air cylinder 264 is stopped and the spill derived position detector 2
03 stops moving and waits.

From this state, the operation of the cutter device 300, which will be described next, is started.

First, the cutting device 300 includes a crown cutting device 310 for finishing the tread W1 (tread surface) of the tire W, and a sidewall portion W3 of the tire W, as shown in FIGS. 2, 7, and 13 to 25.
It is comprised of a side cutter device 320 and a shoulder cutter device 330 for finishing the shoulder portion W2 of the tire W (see FIG. 24).

The crown cutter device 310 includes a guide mechanism 340 disposed on the side frame 14 of the machine frame 11, as shown in FIGS. 2, 7, and 13 to 17 a, b, and c. It is provided through.

The guide mechanism 340 includes two guide shafts 341a and 341b arranged parallel to the drive shaft 130 and the driven shaft 140 of the tire support device 100, and screws formed with reverse threads in opposite directions from the center in the longitudinal direction. One end of the threaded shaft 342 is connected to a drive motor 345 attached to the side frame 14 via a sprocket 343 and a chain 344.

The guide mechanism 340 includes a pair of crown cutter mechanisms 350a and 350b that constitute the crown cutter device 310, and a support plate 311a,
311b and nuts 312a, 312b so that they can be approached and separated.

The crown cutter mechanisms 350a, 350b are composed of a drive mechanism 360 and cutter heads 370a, 370b, as shown in FIG.
Two guide shafts 361a and 36 installed on b
1b and an air cylinder 362. The two guide shafts 361a, 361b are slidably housed inside a case 363 fixed on the support plates 311a, 311b via thrust bearings 364, and the guide shafts 361a, 361b are
and the rod 36 of the air cylinder 362.
At the tip of the cutter head 370a, the cutter head 370a, 3
A fixed plate 371 on which 70b is installed is connected.

The cutter head portions 370a and 370b are, as shown in FIGS. 15a and 15b and 16a and 16b,
A support bracket 372 having a U-shaped cross section is installed on the fixed plate 371.
A rotatable pivot shaft 37 is provided between the two arms 372a.
3 is provided.

A collar 374 is fitted and fixed in the center of the pivot shaft 373, and a cutter holder 377 is rotatably connected to a support bracket 375 provided on a portion of the collar 374 via a shaft 376.

A knife 378 as shown in FIGS. 17a to 17c is attached to the cutter holder 377,
The cutting edge part 379 of this knife 378 is formed in a comb-like recessed part to guide the spew S, burr, etc. to ensure cutting. The blade edge portion 379 is formed to become thinner toward the blade edge portion 379 so as to prevent the blade from forming.

At one end of the pivot shaft 373, weights 380a and 380b are provided to keep the cutter heads 370a and 370b in a horizontal state at all times, and at the other end of the pivot shaft 373, a pivot angle θ ₁ of the pivot shaft 373 is provided. In other words, the knife 378 is the tread W of the tire.
An angle detector 381 is provided for detecting the angle θ ₁ (see FIG. 24) of turning along the curvature of the shoulder portion W2 from the angle θ 1 (see FIG. 24) and regulating its operating range.

Note that the weights 380a and 380b are slightly different due to the difference in the position of the cutter heads 370a and 370b, which finish the upper surface side and the lower surface side of the tire W, in order to maintain the horizontal state. , a stopper is provided to restrict the turning position.

Next, a side cutter device 32 finishes the sidewall portion W3 and shoulder portion W2 of the tire W.
0 and the shoulder cutter device 330 are shown in FIG.
7 (showing the upper side cutter device 320 and shoulder cutter device 330), FIG. 18, FIG. 19 and FIG. 21 (lower side cutter device 3
20 and shoulder cutter device 330), the upper frame 12 and the lower frame 1
3, one ball screw 322a, 322b respectively arranged in parallel via a bracket 321,
It is slidably provided on two guide rods 323a and 323b, respectively.

Ball screws 322a, 3 arranged above and below
22b is a sprocket 3 provided at one end thereof.
24a, 324b are connected via a chain 327 to a sprocket 326 provided on a drive shaft 326 of a drive motor 325 fixed to the side frame 14, and the ball screws 322a, 322b are synchronously driven by the drive motor 325. In addition to being rotationally driven, the side cutter device 320 and shoulder cutter device 330 on the upper and lower sides of the tire W move synchronously in the same direction.

The one ball screw 322a, 322
b, the upper and lower side cutter devices 320 which are slidably provided on the two guide rods 323a and 323b, and the shoulder cutter device 330 are shown in FIGS. 6, 7, 18 to 23a. ，
As shown in b, it is composed of a drive mechanism 328 and a cutter head 329, and the configuration of both is as follows.
Said FIG. 13 and FIG. 15 a, b to FIG. 17 a,
Crown cutter mechanism 35 explained in b and c
The structure is exactly the same as that of the drive mechanism 360 and the cutter head mechanisms 370a and 370b.

That is, the side cutter device 32 finishes the sidewall portion W3 and shoulder portion W2 of the tire W.
0 includes at least one pair of cutter head portions 37 that are translatable in a direction perpendicular to the rotational axis of the tire W, and that are disposed on one side of the sidewall portion W3 of the tire W.
0a and 370b are provided.

In this embodiment, in order to further increase productivity, two cutter heads 370a and 370b are provided on one side of the sidewall portion W3, and each has a structure that can be independently pressed against the sidewall portion W3 by an air cylinder 362. It is located in

Respective cutter head portions 370a, 370b
The knife 37 has the same structure as the cutter heads 370a and 370b of the crown cutter device 310.
A cutter holder 377 holding a cutter holder 377 is rotatably attached, and an angle detector 381 for detecting the pivot angle is arranged at one end of the pivot shaft 373 of the cutter holder 377.

Also, between the fixed plate 371 that slidably holds the side cutter device 320 and the shoulder cutter device 330, and the support plate 260a that slidably holds the spill detector 271, there is a Detector 390 for confirming mutual positions in the tire outer diameter direction
a, 390b (phototubes in this embodiment) are attached.

The side cutter device 320 and the shoulder cutter device 330 arranged on each side of the sidewall portion W3 are connected to ball screws 322a and 3.
22b can be rotated by a drive motor 325 and slidable in the tire outer diameter direction from the center of the tire rotation axis.

Note that the other configurations are the same, so the same reference numerals are given and explanations are omitted.

Next, the cutter device 30 configured as described above
The operation of 0 will be explained.

In the operation of each cutter device, first the tread surface W of the tire W is cut.
1 (tread W1), the crown cutter device 310 has cutter head parts 370a and 370b.
is pressed against the tire tread surface W1 (tread W1) by an air cylinder 362 of the drive mechanism 360. Subsequently, the cutter head portions 370a, 370b,
Since the air cylinder 362 that presses the tire W is supported so as to be able to move in translation with the rotating shaft (drive shaft 130 and driven shaft 140) of the tire W, the ball screw 342 is rotated by the drive motor 342, and the cutter head portions 370a, 370b are attached to the tire W. move along the tread curvature of.

The cutter head portions 370a and 370b include
A cutter holder 377 holding a knife 378 is rotatably mounted, and the cutter holder 377 holds a knife 378 .
One end of the rotation shaft 373 has a rotation angle θ ₁ (second
A detector 381 is arranged to detect the rotation angle (see FIGS. 4 and 25), and the rotation angles of the cutter heads 370a and 370b are specified in advance to this detector 381.

The number of designated turning angles θ ₁ can be set to a maximum of 7 points depending on the tire type classification (see Fig. 29), but in practice, setting 2 points can correspond to 7 types of tires W. . That is, the block design snow tires and snow tires are each set at predetermined angles.

In the case of general tire determination, as shown in FIG. The cutter head part 370 should be fully wrapped around the shoulder part W2 of the cutter head part 370.
A and 370b are pressed against each other while making a translational movement about the axis of rotation of the tire. In this embodiment, in order to improve productivity, the ball screw 342 that has two cutter heads 370a and 370b and moves them is
Two cut head portions 370 are attached with left and right screws lowered from the center of the tire tread W1 (tread W1).
a and 370b are tire tread W1 (tread W1)
The central part of the tire is combined, moves reciprocally to both shoulder sides of the tire, and the tire tread W1 (tread W1)
This is to cut and remove spews and burrs on the body.

In the case of snow tire determination, as shown in FIG. 25, in tires with this type of block design, the point where the tread surface W1 and the sidewall portion W3 intersect, that is, the shoulder portion W2 forms an acute block shape. Cut head part 3 in advance
Detector 381 located at 70a, 370b
is set to operate at a predetermined turning angle θ ₃ of the cutter heads 370a, 370b. That is,
The cutter head portions 370a and 370b are pressed against the center of the tire tread surface W1 (tread W1) and move toward the shoulder portion W2 of the tire, and when the detector 381 is activated, the cutter head portion 370a moves toward the shoulder portion W2 of the tire. ,370
Finish the pressure welding of b. By this operation, the spew S and burrs on the tire tread surface W1 (tread W1) are cut and removed without damaging the block convex portion of the shoulder portion W2.

In the case of snow tire determination, similarly to the snow tire determination described above, the shoulder part W2
However, if the curvature of the shoulder portion W2 is different from that of a snow tire and it is desired to be classified, the detector 381 is set.
With this setting, the cutter heads 370a, 370
In b, the pressing of the cutter heads 370a and 370b is completed at a turning angle different from that of a snow tire in the operation of turning the shoulder portion W2. By this operation, the tire tread surface W1 (tread W1) can be maintained without damaging the block convex portion of the shoulder portion W2.
Cut and remove the spew S and burrs on the part.

In the case of square profile tires, as shown in FIG. 25, some tires have shoulder portions W2 that form an acute angle, similar to block design tires.
If 70a and 370b are completely rotated, their shoulder portions W2 will be damaged. Therefore, the cutter heads 370a, 370 are detected by a detector 381 disposed in the cutter heads 370a, 370b.
By setting the turning angle θ ₃ of b to a predetermined position, it is possible to cut and remove spills and burrs on the tire tread surface W1 (tread W1) without damaging the shoulder portion W2.

In practice, this can be done with the same settings as the snow tires described above, and the number of settings for the detector 381 can be saved.

Also, a side cutter device 320 for finishing the sidewall portion W3 and shoulder portion W2 of the tire W.
In the case of determining a general tire, first, as shown in FIG. While pressing the cutter heads 370a and 370b, the cutter heads 370a and 370b are moved by a predetermined angle θ ₂ from the center of the rotation axis of the tire toward the outer diameter direction of the tire so as to fully wrap around W2. At this time, the shoulder cutter device 330 also presses the side cutter device 320 disposed on the bead side at the same time, and continues to press the shoulder cutter device 330 until the pressure contact of the shoulder cutter device 330 is completed. This operation is performed on both sides of the sidewall portion W3 of the tire to cut and remove spills and burrs from the sidewall portion W3 to the shoulder portion W2 of the tire.

In the case of snow tire determination, as shown in FIG. 25, this type of tire with a block design has an acute angle in the shoulder portion W2, so the shoulder cutter device 330 is activated and the knife 378 is cut into this portion. Press the shoulder part W
Turning along the curved surface of 2 will cause damage to the design part of the tire.

Therefore, in this case, the shoulder cutter device 330 is not brought into pressure contact with the side cutter device 3.
Only 20 operate. The side cutter device 320 is pressed near the rim and moves toward the shoulder portion W2.

The movement end position of the side cutter device 320 is determined by the fact that the spill detector 271 moves from the outer diameter position of the tire toward the bead side and stops at the position where the spill S is detected, so the side cutter device 320 reaches that position. , mutual position confirmation detector 39
When 0a and 390b are actuated, the pressure contact of the cutter is completed. With this operation, the knife 378 cuts and removes the spew S and burrs without damaging the block convex portion of the shoulder portion W2.

In the case of snow tire determination, the side cutter device 32 is used similarly to the snow tire shown in FIG.
Pressure welding is performed using only 0. Side cutter device 320
In the case of this type of tire, since the spill S is not derived from the shoulder portion W2, the spill detector 271 moves to the position preset by the range detector 395 and stops. When the side cutter device 320 reaches that position and the mutual position confirmation detectors 390a and 390b are activated, the side cutter device 320 ends the pressure contact.

In the case of square profile determination, the operation is similar to the snow tire determination.

In the case of a letter tire determination, since a letter tire has a convex part such as a design or letters on the sidewall part W3, if the side cutter device 320 is pressed against that part, it will be damaged. Therefore, the shoulder cutter device 330 is inserted from the bead side in the direction of the outer diameter of the tire without pressing the side cutter device 320 on the side where the side wall portion W3 has a design or a convex portion such as a letter.
and press the side cutter device 320.

Since the range of the design and letters of the sidewall part W3 is determined to some extent, when the range is exceeded, the side cutter device 320 is pressed, the shoulder cutter device 330 rotates the shoulder part W2, and the rotation axis of the cutter holder 377 The angle detector 381 attached to one end of the side cutter 373 is activated to slide the side cutter device 320 to the desired position.

When determining whether a letter snow tire, letter snow tire, letter square profile tire, etc. It slides from the bead side toward the tire outer diameter side without pressing the side cutter device 320 on one side, and when it passes the pressure contact position of the letter LT, it comes into pressure contact again, and the spill detector 271 detects the spill S and stops. slide to the position where it is, and end the pressure welding at that position.

As described above, the tire type determiner 230 classifies the tire into seven types (see FIG. 26).
This is a predetermined operation according to the determination result to control the crown cutter device 310, side cutter device 320, and shoulder cutter device 330 to appropriately cut and remove the spouts S and burrs on the tire W.

Next, the overall operation will be explained.

First, tires W after molding and vulcanization are fed one by one to the tire finishing device 10 using an arbitrary tire feeding device 40. The supplied tire W is positioned to align with the center axis of the upper and lower rims 110, 120 of the tire support device 100.

Then, the positioned tire W is placed on the rim 11.
0,120, inflate and rotate.

Next, the positioning roller 222 of the block pattern detector 201 is pressed against the rotating tire W by the air cylinder 226.

The determination result of the block pattern detector 201, that is, the general classification signal of general tires, square profile tires, and block pattern tires is transmitted to the tire type determination device 400. At the same time, the rotating roller 241 of the letter detector 202 is brought into pressure contact with the sidewall portion W3 of the tire W by the air cylinder 248.

The determination result of the letter detector 202, that is, a general classification signal between regular tires and letter tires is transmitted to the tire type determination device 400.

Further, the rotating roller 275 of the tire outer diameter detection means 204 is brought into pressure contact with the outer diameter portion of the tire W by operating the air cylinders 264 and 272.

In this state, the spew derived position detector 203, which is waiting at a position on the bead side of the tire W, is moved to the tire outer diameter side by driving the drive motor 226, and is moved to the position where the tire outer diameter detector 204 is activated. Stops for a certain period of time.

At this time, if there is abnormal runout in the rotating tire W, the rotating roller 275 of the tire outer diameter detection means 204 is pushed back, and the tire outer diameter detector 20
4, the signal is cut off and an abnormal tire runout warning is generated.

If there is no abnormal runout and the tire W is rotating stably, the air cylinder 270 is operated to press the rotating roller of the spill-derived position detector 203 into contact with it.

Subsequently, the drive motor 226 is operated to move the spill derived position detector 203 again toward the bead side of the tire W, and the spill derived position detector 20
3 searches for the derived position of the Spiyu S while moving, and stops at the position where the Spiyu detector 271 is activated.

When the block pattern detector 201 determines whether the tire is a general tire or a square tire,
From the tire outer diameter detector 204 until the range detector is activated, the spill detector 271
If detected, the tire type determination device 400 determines that this is a general tire.

Furthermore, if the spill derived position detector 203 does not detect the spill S between the time when the tire outer diameter detection means 204 and the range detector 276 are activated, the tire type determiner 400 determines this as a square profile. It is determined that the tire is

Further, if the block pattern detector 201 determines that the tire is a block pattern tire, if the spill derived position detector 203 detects the spill S between the tire outer diameter detector 204 and the range detector 276, Tire type determiner 4
Snow tires are determined based on 00.

If the spill derived position detector 203 does not detect the spill S during the period from the tire outer diameter detector 204 to the activation of the range detector 276, the tire type determiner determines that the tire is a snow tire.

The above classification results of general tires, square profile tires, snow tires, and snow tires are combined with the judgment results of the letter detector described above by the tire type judgment device 400.
They are classified into general tires, letter tires, snow tires, snow tires, letter snow tires, letter snow tires, square profile tires, and letter square profile tires.

The determination result of the tire type determiner 400 is the 29th
As shown in the figure, the signal is transmitted to the cutter device controller of the cutter device 300, and an operation signal corresponding to the type of tire is output to the drive section of each cutter device 300.

As described above, the type of tire W is detected by at least four types of detectors, and depending on the detected type of tire W, the crown cutter device 310, the side cutter device 320, and the shoulder cutter device 330 are used.
While controlling each of these, it is possible to efficiently cut and finish spills, burrs, etc. that originate on the outer circumferential surface of the tire.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the following excellent effects.

(a) A single machine can detect tire block patterns, detect letter tires, detect tire spill-derived positions, detect abnormal tire runout, and automatically distinguish between various types of tires. It is possible to finish the tire automatically and efficiently while controlling the operation of the cutter device according to the type of tire.

(b) Finishing work can be performed efficiently in a narrower space than before without the need for multiple types of finishing machines, and productivity can be improved.

(c) By fitting the tire into a two-piece rim that is wide in the width direction of the tire, inflating it, and rotating it in this state, various types of detectors for determining the type of tire can be connected to an inexpensive contact In addition to stabilizing the rotational position, the sidewall of the tire forms a flat surface in the radial direction of the tire, which prevents spills, burrs, etc. from occurring further away from the rim surface. When cutting and removing spills and burrs,
There is no interference between the cutter and the rim, allowing stable and uniform cutting at all times.

(d) Also, when automatically cutting spills, burrs, etc. on the outer circumferential surface of a tire, if there is abnormal vibration in the rotating tire, this will be detected by the tire outer diameter detection means and the automatic cutting will be stopped. This has the effect of always maintaining highly accurate finishing and reliable operation.

[Brief explanation of drawings]

Fig. 1 is a front view of a tire finishing device embodying the present invention, Fig. 2 is a side view of Fig. 1 and is a schematic configuration diagram showing each device of the invention, and Fig. 3 is an enlarged vertical sectional view of the tire support device. , FIG. 4 is a plan view of the positioning means provided on the tire support device, FIG. 5 is an explanatory diagram of the tire fitted to the tire support device during inflation, and FIG. 6 is a diagram showing the tire type, outer diameter, Fig. 7 is a plan view of Fig. 6, Fig. 8 is an enlarged front view of the block pattern detector, and Fig. 9 is a control circuit of the block pattern detector. Fig. 10 is an enlarged front view of the letter detector, Fig. 11 is a sectional view of the letter detector, Fig. 12 is an explanatory diagram of the control circuit of the letter detector, and Fig. 13 is an enlarged view of the crown cutter device. A plan view, FIG. 14 is an enlarged sectional view of the guide mechanism of the crown cutter device, FIGS. 15a and 15b are a plan view and a side view of the upper cutter head of the crown cutter device, and FIGS. Figure 16b is a plan view and a side view of the cutter head on the lower side of the crown cutter device, and Figures 17a, 17b, and 17c are a plan view, side view, and rear view of the knife attached to the cutter head. , FIG. 18 is a plan view showing the installation state of the side cutter device and shoulder cutter device on the lower side, and FIG. 19 is the − of FIG. 18.
20 is a sectional view taken along the - line in FIG. 18, FIG. 21 is a sectional view of the lower side cutter device, and FIGS. 22a and 22b are side cutter device or shoulder cutter device. 23a and 23b are a front view and a side view of the cutter head section on the upper side, FIG. 23a and FIG. 23b are front and side views of the cutter head section on the lower side of the side cutter device or shoulder cutter device, and FIG. Explanatory diagram of the operation of the device, 2nd
FIG. 5 is an explanatory diagram of the operation of the cutter device in block design tires and square profile tires, and FIG. 26 is a block explanatory diagram showing the overall operation. DESCRIPTION OF SYMBOLS 10... Tire finishing device, 11... Machine frame, 100... Tire support device, 110... Upper rim, 120... Lower rim, 130... Drive shaft, 140... Drive shaft, 200... Detection device ,2
01...Block pattern detector, 202...Letter detector, 203...Spew derived position detector, W...Tire.

Claims (1)

[Claims] 1 A rotatable drive shaft equipped with an inflation mechanism and a driven shaft that can rotate and move up and down on the axis of the drive shaft are provided in the machine frame, and shaft terminals of the drive shaft and the driven shaft that face each other are provided. A wide rim in the width direction of the divided tires is attached to each section to fit and hold the transported tire, and a block pattern of the tire is formed on the machine frame near the outer peripheral surface of the tire that is fit and held by the rim. It is composed of a block pattern detector for detecting a letter tire, a letter detector for detecting a letter tire, a spew derivation position detector for detecting a spew derivation position of the tire, and a tire outer diameter detecting means for detecting abnormal tire runout. The detection devices are respectively disposed so as to be able to be press-contacted, and a cutter device is respectively provided to automatically finish off spills, burrs, etc. that are generated after the tire is vulcanized and molded. A tire type determination device is provided for determining the type of tire based on a detection signal output from the sensor and the spew derived position detector, and a tire type determination device is provided for determining the tire type based on the detection signal output from the tire type determination device. A tire finishing device characterized in that it is configured to select and control operations.