JP2001150458A - Trimming apparatus for tire spew - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trimming apparatus capable of lowering the residual height of spew without damaging the surface of a tire to remove the spew and capable of improving the cut surface of the spew and the appearance of the tire. SOLUTION: A pair of left and right shakable trimming heads 20a, 20a are arranged between a drive roller 3 and a support roller 4 and sidewall part trimming heads 20b, 20b are arranged at the left and right symmetric positions above a tire housing space part 2 so as to follow the shapes of the sidewall parts Wd of a vertically rotated tire W. The shaking fulcrum O of the trimming heads 20a, 20a are set as the intersecting point of two tangential lines Xa, Xb passing the contact point of the trimming heads 20a, 20a coming into contact with the outer diameter circles of maximum and minimum tires W1, W2 to be trimmed and made movable in parallel to a tire rotary axis Z.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire spew trimming device, and more particularly, to a spew generated from a tire tread portion, a tire shoulder and a tire side portion at the time of vulcanization of a tire. The present invention relates to a tire spew trimming device capable of automatically cutting a burred or beard-shaped protrusion) without using a cutting device such as a cutter and shortening the remaining length after cutting.

[0002]

2. Description of the Related Art Conventionally, during vulcanization of a tire, a rubber material melted at the time of vulcanization flows out of a seam of a mold or a vent hole to the tire surface side, and burrs or whiskers are formed.
Is known to occur on the tire surface. Such spews not only impair the appearance of product tires,
Since it may affect running noise and the like, the tire spew is actively trimmed after the tire is formed.

[0003]

As a conventional method of trimming a tire spew, a method of trimming with a scalpel (a comb-shaped cutter) and a method of trimming the spew with rollers (gears) are used. Have been done.

The former method of trimming a spew with a scalpel is a method of cutting at a high speed (around 300 rpm) while pressing a comb-shaped scalpel along the surface of the tire. Depending on the pattern or the like, there is a possibility that the scalpel may damage the surface of the tire, so that the scalpel cannot be brought close to the tire surface, so that the uncut height of the spew increases.

Further, when the scalpel is brought close to the tire surface in order to reduce the uncut height of the spew, the surface may be damaged as described above. Particularly, in the case of a tire having an angular shoulder portion, the tire surface may be damaged. Had the problem of being expensive.

When the spew is cut with a scalpel, the spew is pushed down by the scalpel because the scalpel is pressed from one side of the elastic spew, and the cut surface is at an angle of 40 to 60 degrees with respect to the tire surface. There is a problem that the surface becomes oblique, the cut surface becomes a so-called bamboo shoot, and the remaining portion of the spew becomes longer, making it impossible to improve the appearance.

Further, in the latter trimming method using a roller (gear), the gear of the cutting roller is completely meshed because the cutting roller has a gear mechanism that serves both as a driving unit and a cutting unit. There is a problem that clogging of the spew occurs in the cutting roller portion, which significantly impairs productivity.

An object of the present invention is to reduce the remaining height of the spew without damaging the tire surface, to remove the spew, to obtain a good cut surface of the spew, and to improve the appearance of the tire. An object of the present invention is to provide a tire spew trimming device that can be used.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a tire tread that rotates vertically with a driving roller and a supporting roller disposed at symmetrical positions below a tire receiving space of a supporting frame. Parts are rotatably supported, and the tire side parts are rotatably supported by guide rollers arranged at symmetrical positions on both sides of the support frame, and the spew tips generated on the tire surface during tire vulcanization are rotated synchronously. A tire spew trimming device, comprising: a trimming head that is nipped between a pair of left and right driven rotating bodies to be driven and pulls and breaks a spew generated on the tire surface by the rotating force of the rotating body, wherein the driving roller and the supporting roller And a swingable trimming head that follows the shape of the tread portion of the tire is disposed between the trimming head and the swing fulcrum of the trimming head. Is provided at the intersection of two tangents passing through the contact point where the outer diameter circular trimming heads of the largest tire and the smallest tire to be trimmed contact, and the swing fulcrum of the trimming head is moved in parallel with the tire rotation axis. The gist is that the configuration is made possible.

[0010] The present invention also provides a driving frame and a supporting roller disposed at symmetrical positions below a tire accommodating space of a support frame for rotatably supporting a vertically rotating tire tread portion. The side of the tire is rotatably supported by guide rollers arranged at symmetrical positions on both sides of the tire, and the tip of the spew generated on the tire surface during vulcanization of the tire is sandwiched between a pair of left and right rotating bodies that rotate synchronously. A tire spew trimming device including a trimming head for pulling and breaking a spew generated on the tire surface by the rotational force of the rotating body, wherein the tire rotates vertically in left and right positions above the tire housing space. A trimming head is provided on a support plate that follows the shape of the side wall portion and that can move up and down along the support frame. The processing center point of the pair of left and right rotating bodies of the trimming head is configured to coincide with the center of the trimming head. Between the trimming head and the support plate, the swing angle of the trimming head about the support point is set. The gist of the present invention is that a multi-stage cylinder for controlling the multi-stage is provided.

Further, the present invention provides a drive frame and a support roller disposed at symmetrical positions below a tire accommodating space of a support frame for rotatably supporting a tire tread portion which rotates vertically and supporting the tread portion. The tire side part is rotatably supported by guide rollers arranged at symmetrical positions on both sides of the frame, and the tip of the spew generated on the tire surface during tire vulcanization is sandwiched between a pair of left and right rotating bodies that rotate synchronously and rotate. A tire spew trimming device including a trimming head that pulls and breaks a spew generated on the tire surface by the rotational force of the rotating body, wherein a shape of a tread portion of the tire is provided between the driving roller and the support roller. A swingable trimming head is provided to follow, the swing fulcrum of the trimming head, the largest tire to be trimmed and Provided two tangents intersection through the contact point of the outer diameter shape of the trimming head of the small tires are in contact,
The swinging fulcrum of the trimming head is configured to be movable in parallel to the tire rotation axis, and follows the shape of the sidewall portion of the vertically rotating tire at the left and right positions above the tire housing space portion, and is supported. A trimming head is provided on a support plate that can be raised and lowered along a frame, and a processing center point of a pair of left and right rotating bodies of the trimming head is configured to coincide with a center of the trimming head. The gist of the present invention is to provide a multi-stage cylinder for controlling the swing angle of the trimming head in multiple stages around the support point between the support plate and the support plate.

The present invention is configured as described above, and the synchronization of the trimming head which follows the shape of the tire with the spew tip generated on the tire surface, that is, the tire tread portion, the tire shoulder and the tire side portion at the time of vulcanizing the tire. By pinching between a pair of left and right rotating bodies that are driven to rotate and pulling and breaking the spew generated on the tire surface by the rotating force of the rotating body, the remaining height of the spew is reduced without damaging the tire surface. And the cut surface of the spew is good, and the appearance of the tire can be improved.

[0013]

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

FIG. 1 is a front view of a tire spew trimming device embodying the present invention, and FIG. 2 is a side view of FIG. 1. The trimming device is a tire supporting space 1 of a framed support frame 1. Below, as shown in FIGS. 1, 2, and 3 to 5, a driving roller connected to a driving motor (not shown) that rotationally drives the tire W while supporting a lower symmetric position of a tread portion Wa of the tire W. 3 and a support roller 4 composed of a free roller are disposed at positions facing each other.

A plurality of divided rollers 5a and 5b for supporting both lower side portions Wb of the tire W supported by the driving roller 3 and the supporting roller 4 are provided on both lower side portions of the support frame 1. A pair of left and right lower fixed guide means 6 and a lower movable guide means 7 are provided at positions facing each other, and the roller 5a of the lower fixed guide means 6 is
The roller 5b of the lower movable guide means 7 is fixed in parallel with the support frame 1 via a support bracket 8, and a plurality of cylinders 9 horizontally mounted on the support frame 1.
Are arranged in parallel at predetermined intervals via a support bracket 10 so as to be adjusted and positioned with respect to the tire width.

The roller 5a of the lower fixed guide means 6 and the roller 5b of the lower movable guide means 7 are mounted so as to rotate following the rotation direction of the tire. It is configured to eliminate occurrence.

Further, a pair of left and right center fixed guide means 12 provided with a plurality of divided multiple free rollers 11a and 11b for supporting both center side portions Wc of the tire W are provided on both sides of the center of the support frame 1. Central movable guide means 13
Are disposed at positions facing each other, and the central fixed guide means 1
The two free rollers 11a are fixed in parallel to the support frame 1 via a support bracket 14, and the free rollers 11b of the central movable guide means 13 are supported by a plurality of cylinders 9a mounted horizontally on the support frame 1. They are arranged in parallel at predetermined intervals via brackets 15 so that they can be adjusted and positioned with respect to the tire width.

The free roller 11a of the center fixed guide means 12 and the free roller 1 of the center movable guide means 13
1b is mounted so as to rotate following the rotation direction of the tire, and is particularly configured to suppress the generation of a component force due to a peripheral speed difference in the tire radial direction and a slip angle.

Between the drive roller 3 and the support roller 4, a pair of swingable right and left tire crown trimming heads 2 that follow the shape of the tread Wa of the tire W are provided.
0a and 20a are provided, and the tire accommodation space 2
Sidewall trimming heads 20b, 20b that follow the shape of the sidewall Wc of the tire W rotating vertically are disposed at the upper left-right symmetric position.

As shown in FIG. 6, the trimming heads 20a, 20a of the tire crown portion are set so that the swing fulcrum O of the trimming heads 20a, 20a is the outer diameter of the maximum tire W1 and the minimum tire W2 to be trimmed. The intersection of two tangents Xa, Xb passing through the contact points of the trimming heads 20a, 20a contacting on a circle is defined as the intersection of the oscillating fulcrum O of the trimming heads 20a, 20a.
It is configured to be movable in parallel with.

By setting the swing fulcrum O in this manner,
The trimming heads 20a, 20a can be pressed at an optimum angle to any part of the tread Wa of the tire W regardless of the outer diameter and the cross-sectional shape of the tire W1, W2.

Next, a specific configuration of the trimming heads 20a, 20a at the tire crown will be described with reference to FIGS. The trimming heads 20a, 20
a has two rotating shafts 22 extending substantially across the space 21a at substantially the center in the longitudinal direction of a frame 21 formed in a hollow shape.
a, 22b are disposed in parallel, and the rotating shafts 22a, 22b
Both ends of b are rotatably supported via bearing members 23.

The two rotating shafts 22a and 22b are respectively provided with a pair of left and right rotating bodies 24a and 24b such as a pair of left and right cutting gears for breaking the tire spew Q therebetween.
The transmission gears 25a and 25b are provided at a predetermined interval, and the transmission gears 25a and 25b are configured not to mesh with each other. In addition, the rotating bodies 24a and 24b
It is also possible to use a roller having a friction surface whose surface is knurled or a polygonal cylindrical body.

Transmission Gear 25 Constituting the Rotary Drive Mechanism
a, 25b, the drive shafts 26a, 26
b, the driving gears 27a, 2 supported in a cantilevered state
7b, the drive gears 27a and 27b mesh with each other, and the drive gear 27a is connected to the transmission gear 25a.
The drive gear 27b is configured to mesh with the transmission gear 25b.

A power transmission gear 28 is provided on a drive shaft 26b of the drive gear 27b projecting from the frame 21 to the outside. The power transmission gear 28 is mounted on the frame 21 via a support plate 29 via a support plate 29. Motor 30
And a drive gear 32 provided on the rotary shaft 31 of the first motor.

Therefore, the driving motor 30 as the driving means
Is transmitted to the drive gears 27b and 27a via the drive gear 32, the power transmission gear 28, and the drive shaft 26b.
The rotational driving force of the driving gears 27b and 27a is
The rotation shafts 22a and 22a are individually transmitted to the shafts 5b and 25a.
The pair of rotators 24a and 24b provided in b are rotated independently and synchronously.

The two guide shafts 23a, 23b are provided at predetermined intervals on the frame 21 at the front and rear of the rotating shafts 22a, 22b supporting the pair of left and right rotating bodies 24a, 24b.
Are arranged in parallel with each other, and a plurality of auxiliary rollers 34 for keeping a certain distance between the rotating bodies 24a, 24b and the tire surface are arranged on the respective guide shafts 33a, 33b with their phases shifted. I have.

The lower surface of the auxiliary roller 34 attached to each of the guide shafts 33a, 33b is connected to the pair of rotating bodies 24a, 2b.
4b, projecting slightly below the lower surface, and contacting the surface of the tire W from which the spew Q is to be removed.
a and 24b are guided. The auxiliary roller 34 may be provided on at least one of the front and rear sides of the pair of rotating bodies 24a and 24b, particularly on the introduction side of the tire spew Q, and may be provided on the front and rear sides of the rotating bodies 24a and 24b. is there.

Further, the guide roller 14 located on the introduction side of the tire spew Q can be divided into multiple sections and narrow in width, and can have a multi-axial support structure as shown in FIG.

The trimming heads 20a, 20
a supporting shafts 35 provided on both sides of the frame 21 supporting
As shown in FIGS. 6 and 7, the center of a, 35b is the processing point, that is, the center (center of gravity) of the cutting rotators 24a, 24b.
And is configured to be able to follow the angle of the tire profile with a delicate pressing force.

A bracket 37 provided on the inside of the tip of a swing arm 36a, 36b formed in a substantially L-shape is attached to the support shaft 35a, 35b via a fastening member 38 such as a bolt. The base ends of the moving arms 36a and 36b are swingably attached to the swing fulcrum O of the trimming heads 20a and 20a.

The rods 40a, 4 of the swing cylinders 39a, 39b mounted horizontally on the support frame 1 are provided on the outer ends of the swing arms 36a, 36b.
0b is connected to the swing cylinder 39a, 3b.
The pair of rotating bodies 24a, 24b of the trimming heads 20a, 20a are configured to contact and trim the tire spew Q by following the shape of the tread portion Wa of the tire W by the expansion and contraction operation of 9b.

Next, as shown in FIG. 1, a tire unloading device 41 for unloading the trimmed tire W from the trimming device to the outside is provided below the support frame 1. The base end of a substantially L-shaped tire kicking arm 42 is swingably attached to the lower end of the support frame 1 via a shaft 43, and the tip of the tire kicking arm 42 is The distal end of a rod 45 of a carry-out cylinder 44 having a base end attached to an upper portion of the support frame 1 is rotatably connected.

Accordingly, the rod 4 of the carry-out cylinder 44
5 is extended, the tire W to be trimmed is supplied, and after the trimming is completed, the unloading cylinder 44 is set.
When the rod 45 is contracted, the kick-out arm 42 pivots clockwise in FIG. 1 around the shaft 43 and kicks out of the support frame 1 while supporting the outer peripheral surface of the tire W. It was done.

The side wall trimming heads 20b provided at symmetrical positions above the tire housing space 2 are provided.
20b is configured to follow the shape of the sidewall portion of the tire W that rotates vertically.

That is, as shown in FIGS. 1 and 2, the side wall trimming heads 20b, 20b are moved up and down from the center position of the upper horizontal frame 1a to the guide rod 46 vertically suspended from the central horizontal frame 1b. Cylinder 4
The support plate 48 is mounted to be able to move up and down through the support cylinder 7.
9 are mounted horizontally.

The side wall trimming heads 20b, 20b are swingably mounted on a bracket 50 provided at the end of the rod of the front and rear cylinder 49.

A multi-stage cylinder 51 is provided between the side wall trimming heads 20b, 20b and the support plate 48 for controlling the swing angle in multiple stages around the support point P of the trimming heads 20b, 20b.
Is provided, regardless of the outer diameter and cross-sectional shape of the tire W,
A pair of rotating bodies 24a, 2b of the trimming heads 20b, 20b are set at an optimum angle at any part of the side wall.
4b, and is configured to move up and down on the tire center in the vertical direction.

The center of the upper horizontal frame 1a of the support frame 1 has a tire tread W
a rotatable touch roller 52 that rotatably supports the support cylinder a is supported by a rod 54 of a support cylinder 53 erected on the upper horizontal frame 1a.
Mounted horizontally.

The structure of the side wall trimming heads 20b, 20b is substantially the same as the structure of the above-described tire crown trimming heads 20a, 20a, and a detailed description thereof will be omitted.

The trimming device according to the present invention is configured as described above, and the principle of the method for trimming the tire spew using this device will be described with reference to FIGS. 10 (a) to 10 (f).

A trimming device is installed on the surface portion of the tire W where the spew Q is generated via an auxiliary roller 34, and the drive motor 30 of the trimming device is driven to synchronize the pair of left and right rotating bodies 24a and 24b. It is kept in a state of being rotationally driven. When the tire W is moved at a predetermined speed in the direction of the arrow X from such a state, the tip of the spew Q first contacts the side surface of the rotating body 24a and is elastically deformed (FIG. 1).
0 (b)), and then the spew Q on the surface of the tire W moves between the rotating bodies 24a and 24b (see FIG. 10 (c)).

The tip of the spew Q that has entered between the rotating bodies 24a and 24b is sandwiched between a pair of left and right rotating bodies 24a and 24b driven to rotate in the same phase as shown in FIG. As shown in FIG. 10 (e), the rotary driving force of 24 a and 24 b pulls the upper part upward,
Finally, the spew Q is broken from the root (see FIG. 10 (f)).

FIG. 11 shows a state where the tread portion Wa and the shoulder portion Wb of the tire W are trimmed by the trimming heads 20a, 20a of the tire crown portion and the sidewall trimming heads 20b, 20b.

Trimming head 20 for tire crown
When trimming the spew Q generated in the tread portion Wa of the tire W with the pair of rotating bodies 2 of the trimming heads 20a, 20a by expanding and contracting the swing cylinders 39a, 39b as described above.
4a and 24b are configured to contact and trim the tire spew Q while following the shape of the tread Wa of the tire W.

The trimming heads 20a, 20a
a is the center (center of gravity) of the rotating bodies 24a and 24b and the support shaft 3
Since they are provided so as to coincide with the centers of 5a and 35b, trimming can be performed by following a tire profile with a slight pressing force.

When trimming the spew Q generated in the shoulder portion Wb of the tire W with the side wall portion trimming heads 20b, 20b, the vertical movement of the tire W rotating vertically The trimming heads 20b and 20b are pressed against the sidewall portions via the front and rear cylinders 49 and the multi-stage cylinder 51 in a state where the possible touch roller 52 is pressed against the tread portion so as not to swing sideways, and trimming is performed.

The trimming heads 20b, 20b
As described above, the processing center point of the pair of left and right rotating bodies 24a, 24b of the trimming heads 20b, 20b and the swing center P
, The trimming heads 20b, 20b at an optimum angle at any part of the sidewall portion regardless of the outer diameter and cross-sectional shape of the tire W.
The pair of rotating bodies 24a and 24b can be pressed and trimmed. In addition, trimming is performed by raising and lowering the tire center as needed.

FIG. 12 shows the trimming heads 20b, 2b from the side portion Wc of the tire W toward the shoulder portion Wb.
It is explanatory drawing of the state which is trimming while turning 0b.

As described above, according to the present invention, the tread portion Wa, the shoulder portion Wb, and the side portion Wc of the tire W can be continuously trimmed by using a plurality of trimming heads 20a and 20b. The remaining height of the generated spew Q is also short and can be efficiently removed.

[0051]

According to the present invention, the spew tip generated on the tire surface during tire vulcanization as described above is trimmed by a plurality of exclusive trimming heads, so that the following excellent effects can be obtained. To play. . Since the spew is broken while being pulled while being held between a pair of rotating bodies without using a cutting device such as a conventional cutter, it is possible to remove the spew by reducing the remaining height of the spew without damaging the tire surface. I can do it.
In particular, even a tire having an angular shoulder portion can be cut efficiently without damaging the surface. . The cut surface of the spew that has been pulled and broken is also good, and the appearance of the tire can be made good. . Even if the tire has low rigidity and is easily deformed, the spew can be efficiently and reliably broken without inflating the tire and rotating it at a high speed. . No adjustment is required even if the outer diameter or width of the tire to be rotated changes. . Small and inexpensive to manufacture. . Unnecessary force by the guide means is not applied to the tire W, so that the tire can be stably rotated. In addition, since there is no need to particularly press the tire, the driving force and the guide force for rotationally driving the tire can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a trimming device embodying the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an enlarged plan view of a tire guide roller.

FIG. 4 is a diagram illustrating the operation of a tire guide roller.

FIG. 5 is a side view of FIG. 4;

FIG. 6 is an arrangement diagram of a trimming head for a tire crown portion and a sidewall portion.

FIG. 7 is a front view of the trimming head.

FIG. 8 is a bottom view of FIG. 7;

FIG. 9 is a side view as viewed in the direction of arrows AA in FIG. 8;

10 (a) to 10 (f) are explanatory views showing the principle diagram of a tire spew trimming method.

FIG. 11 is a diagram illustrating the operation of a method for trimming a tire crown trimming head and a sidewall trimming head.

FIG. 12 is an operation explanatory view of a trimming method of a side wall portion trimming head.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Support frame 2 Tire accommodation space part 3 Drive roller 4 Support roller 5a, 5b roller 6 Lower fixed guide means 7 Lower movable guide means 8 Support bracket 9, 9a Cylinder 10 Support bracket 11a, 11b Free roller 12 Central fixed guide means 13 Center Movable guide means 14 Support bracket 20a, 20b Trimming head 21 Frame 21a Space 22a, 22b Rotating shaft 23 Bearing member 24a, 24b Rotating body 25a, 25b Transmission gear 26a, 26b Drive shaft 27a, 27b Driving gear 28 Power transmission gear 29 Support Plate 30 Drive motor 31 Rotary shaft 32 Drive gear 33a, 33b Guide shaft 34 Auxiliary rollers 35a, 35b Support shaft 36a, 36b Swing arm 37 Bracket 38 Fastening member 39a, 39b Swing Cylinders 40a, 40b Rod 41 Tire unloading device 42 Tire kicking arm 43 Shaft 44 Unloading cylinder 45 Rod 46 Guide rod 47 Lifting cylinder 48 Support plate 49 Front and rear cylinders 50 Frame 51 Multi-stage cylinder 52 Touch roller 53 Support cylinder 54 Rod Q Spew W Tire Wa Tread surface Wb Shoulder part Wc Side part

Claims (8)

[Claims] A tire tread portion that rotates vertically is rotatably supported by a driving roller and a support roller disposed at symmetrical positions below a tire accommodating space of a support frame, and both sides of the support frame are symmetrical. The tire side portion is rotatably supported by a guide roller disposed at the position, and the tip of the spew generated on the tire surface during vulcanization of the tire is sandwiched between a pair of left and right rotating bodies that are driven synchronously and rotated. A tire spew trimming device including a trimming head for pulling and breaking a spew generated on a surface of the tire by a rotational force of a body, wherein a swing following a shape of a tread portion of the tire is provided between the driving roller and a supporting roller. A movable trimming head is provided, and a swing fulcrum of the trimming head is set to an outer diameter of a maximum tire and a minimum tire to be trimmed. The two tangents of the intersection through the contact point of the trimming head in contact with the upper, the swing fulcrum of the trimming head, the trimming device of the tire scan Pew consisting configured to be movable in parallel to the tire rotation axis. 2. The tire according to claim 1, wherein an auxiliary roller for maintaining a constant distance between the tire surface and the rotating body is provided on at least one of the front and rear portions of the pair of left and right rotating bodies of the trimming head. Spyu's trimming device. 3. The tire spew trimming device according to claim 1, wherein a vertically movable touch roller for rotatably supporting a tire tread portion is suspended at a center of an upper horizontal frame of the support frame. 4. A tire tread portion that rotates vertically is rotatably supported by a drive roller and a support roller disposed at left and right symmetrical positions below a tire accommodating space portion of the support frame, and both sides of the support frame are symmetrical. The tire side portion is rotatably supported by a guide roller disposed at the position, and the tip of the spew generated on the tire surface during vulcanization of the tire is sandwiched between a pair of left and right rotating bodies that are driven synchronously and rotated. A tire spew trimming device including a trimming head that pulls and breaks a spew generated on a surface of the tire due to a rotational force of a body, wherein a sidewall of the tire that rotates vertically is provided at a left and right position above the tire receiving space. Disposing a trimming head on a support plate that follows the shape of the part and that can move up and down along the support frame; The processing center point of the pair of left and right rotating bodies and the center of the trimming head are configured to coincide with each other, and between the trimming head and the support plate, the swing angle of the trimming head around the support point is set in multiple steps. Trimming device for tire spews provided with a multi-stage cylinder for controlling 5. The tire spew trimming device according to claim 4, wherein a vertically movable touch roller for rotatably supporting a tire tread portion is suspended at the center of the upper horizontal frame of the support frame. 6. The trimming head according to claim 4, wherein at least one of the front and rear portions of the pair of left and right rotating bodies of the trimming head is provided with an auxiliary roller for keeping a constant distance between the tire surface and the rotating body. Tire spew trimming equipment. 7. The tire spew trimming device according to claim 4, wherein the trimming head that follows the shape of the sidewall portion of the tire moves up and down in a vertical direction on a tire center. 8. A vertically extending tire tread portion rotatably supported by a drive roller and a support roller disposed at left and right symmetric positions below a tire accommodating space portion of the support frame, and symmetrically on both sides of the support frame. The tire side portion is rotatably supported by a guide roller disposed at the position, and the tip of the spew generated on the tire surface during vulcanization of the tire is sandwiched between a pair of left and right rotating bodies that are driven synchronously and rotated. A tire spew trimming device including a trimming head for pulling and breaking a spew generated on a surface of the tire by a rotational force of a body, wherein a swing following a shape of a tread portion of the tire is provided between the driving roller and a supporting roller. A movable trimming head is provided, and a swing fulcrum of the trimming head is set to an outer diameter of a maximum tire and a minimum tire to be trimmed. The fulcrum of the trimming head is provided at the intersection of two tangents passing through the contact point where the trimming head is in contact with the rim, and the swing fulcrum of the trimming head is movable in parallel with the tire rotation axis. At the position, the trimming head is arranged on a support plate that follows the shape of the sidewall portion of the tire that rotates vertically and that can move up and down along the support frame,
The processing center of the pair of left and right rotating bodies of the trimming head is configured to coincide with the center of the trimming head, and the trimming head is swung about the support point between the trimming head and the support plate. A tire spew trimming device equipped with a multi-stage cylinder that controls the angle in multiple stages.