WO2011161994A1

WO2011161994A1 - Buffing device for annular member and method and device for buffing precure tread

Info

Publication number: WO2011161994A1
Application number: PCT/JP2011/056705
Authority: WO
Inventors: 小川　裕一郎
Original assignee: 株式会社ブリヂストン
Priority date: 2010-06-25
Filing date: 2011-03-22
Publication date: 2011-12-29
Also published as: JP2013176848A

Abstract

Provided are a method and a device for buff polishing an inner surface of an annular member such as an annularly formed precure tread uniformly and without any excess or deficiency, wherein the inner surface of the precure tread (20) defining an annular member is subjected to a buff polishing wherein the precure tread (20) is supported and rotated by a plurality of rollers (11A, 11B, 12), and the inner surface of the rotating precure tread (20) receives pressing from rotating wire brushes (13A, 13B) defining buffing members, and wherein the rollers (11A, 11B, 12) and the wire brushes (13A, 13B) are arranged in a case (4), and buffing powder for the precure tread (20) is sucked by a suction hose (5b) and fed to and collected in a suction device (5).

Description

Buffing device for annular member and buffing method and device for precure tread

The present invention relates to an apparatus and a method for buffing an inner peripheral surface of an annular member such as a precure tread formed in an annular shape.

As a method of reclaiming used tires with worn out treads, after scraping the surface of the used tires, buffing with a buffing machine or the like to remove the treads to produce a base tire, and this base tire is pre-vulcanized. There is known a method in which a tread (precured tread) having a tread pattern formed on the surface is pasted and the base tire and the precuretread are vulcanized and bonded in a vulcanizing can.
In the precured tread, silicon is applied to an unvulcanized precured tread, a mold or a bladder in order to improve the peelability after vulcanization. Therefore, when bonding the precure tread, to remove the silicon by buffing the inner peripheral surface side of the precure tread, which is the side to be bonded to the pedestal tire, and to improve the adhesion with the pedestal tire, The fresh rubber surface was exposed.

As a conventional precured tread buffing method, as shown in FIGS. 5 (a) and 5 (b), a precured tread 52 is placed by a conveyor 51 with a back surface 52a facing upward (opposite to the conveyor belt 53). A method of buffing the back surface 52a of the precure tread 52 by pressing the sanding belt 54c that is transported in the direction and is wound around the

rollers

54a and 54b of the buffing machine 54 is disclosed (for example, Patent Documents). 1). In Patent Document 1, a receiving roller 55 is provided at a position facing the roller 54 a of the conveyor belt 53, and a plurality of nozzles 56 are disposed on the receiving roller 55 side of the conveyor belt 53, so that the surface 52 b of the precure tread 52 is provided. Buffing is performed while blowing air. Thereby, since the buttress part 52k does not escape downward, the precure tread 52 can be uniformly buffed.
Further, as shown in FIG. 6, a buffing unit 61 S that is a portion where the precure tread 52 contacts the buff wheel 62 k of the buffing machine 62 of the transfer unit 61 that transfers the precure tread 52 is provided to the buffing machine 62. There has been proposed a method of performing uniform buffing by constructing so as to protrude upward and performing buffing on the raised part (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 7-108629 Japanese Patent Laid-Open No. 5-116235

However, each of the buffing methods disclosed in

Patent Documents

1 and 2 uses an apparatus for buffing a belt-shaped precure tread, and the back surface (inner peripheral surface) of the precure tread formed in an annular shape. When buffing, it was done manually.
However, there was a shaving unevenness (left uncut, deficient or excessive) by manual work, and there was a problem in adhesiveness and shape uniformity.
Further, the buffed powder was sucked by a suction device such as a dust collector, but the working environment was bad and the worker had to wear a mask.

The present invention has been made in view of the conventional problems, and provides a method and apparatus for buffing the inner surface of an annular member such as a precure tread formed in an annular shape uniformly and without excess or deficiency. With the goal.

The present invention is an apparatus for buffing the inner peripheral surface of an annular member, holding the annular member from the inner peripheral side, and rotating the annular member with the axial direction of the annular member as a rotation axis A holding / rotating means; and a buff member that rotates while contacting the inner peripheral surface of the annular member, and the holding / rotating means is disposed on the inner peripheral surface side of the annular member, and the annular member A plurality of inner rollers extending in the axial direction of the annular member, and an outer roller disposed between the buff member and the annular member on the outer peripheral side of the annular member and extending in the axial direction of the annular member, At least one of the rollers is a driving roller that rotates around an axis of rotation parallel to the axial direction of the annular member to rotate the annular member held by the inner roller, and the buff member includes Axial direction of annular member Characterized by rotating around parallel rotational axes.
Thereby, since constant tension | tensile_strength can be given to annular members, such as a precure tread, the contact amount of a buff member and an annular member can be made constant. Therefore, it is possible to provide a buffing apparatus capable of buffing the inner peripheral surface of the annular member uniformly and without excess or deficiency.

The present invention also includes a case that seals the holding / rotating means, and a suction means that sucks the shaving powder (buff powder) generated in the case, having a cylindrical body that communicates with a suction port provided in the case. And further comprising.
Thus, by making the inside of the case a sealed space, the buff powder does not scatter to workers working outside the case and surrounding devices, so that the working environment can be improved.

Further, the present invention is a method for buffing an inner peripheral surface of a precured tread formed in an annular shape, wherein the precure tread is rotated while holding the annular precured tread from the inner peripheral surface side. At the same time, the buff member is pressed against the inner peripheral surface of the precure tread while rotating to buff the inner peripheral surface of the precure tread.
Thereby, the inner peripheral surface of the precure tread can be buffed uniformly and without excess or deficiency.
In addition, the invention of the present application buffs the inner peripheral surface of the precure tread inside a sealed box, and collects the dust generated by the buffing by suction from a suction port provided in the box. It is characterized by doing.
Thereby, scattering of buff powder can be prevented reliably.

Further, the present invention is an apparatus for buffing an inner peripheral surface of a precured tread formed in an annular shape, and a plurality of inner rollers that rotate while holding the annular precured tread from the inner peripheral surface side, and A buff member that rotates while contacting the inner peripheral surface of the precure tread, an outer roller disposed between the buff member and the precure tread on the outer peripheral side of the precure tread, and the precure tread. A tread diameter expanding means for expanding and holding the diameter, wherein the tread diameter expanding means includes a plurality of holding members in contact with an inner peripheral surface of the precure tread, and a precure tread after buffing the plurality of holding members. And a means for moving them radially outward.
By adopting such a configuration, the precure tread can be automatically buffed, and the inner peripheral surface of the precure tread can be uniformly and sufficiently buffed.

It is a figure which shows the buff apparatus of the precure tread which concerns on this Embodiment. It is a principal part perspective view of the buffing device of a precure tread. It is a figure which shows the buff apparatus of the precure tread which concerns on this Embodiment 2. FIG. It is a figure for demonstrating the assembly method of a precure tread. It is a figure which shows the buffing method of the conventional precure tread. It is a figure which shows the other example of the buffing method of the conventional precure tread.

Hereinafter, the present invention will be described in detail through embodiments, but the following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

Embodiment 1 FIG.
1A and 1B are diagrams showing a schematic configuration of a precure tread buffing apparatus (hereinafter referred to as a buffing apparatus) 10 according to the first embodiment.
The buffing device 10 includes

driving rollers

11A and 11B, a tension roller 12,

wire brushes

13A and 13B as buff members, receiving

rollers

14A and 14B, a driving roller rotating unit 15, a tension roller moving unit 16, and a hub. A member rotating means 17, a hub member pressing means 18, and a shaving powder receiving tray 19 are provided.
Each component of the buffing device 10 is attached to a horizontal plate-like base 1, a holding base 2 standing on the base 1, and a support member 3 attached so as to extend in the horizontal direction of the holding base 2. It is done. If the base 1 is provided with wheels 1r and legs 1m and the legs 1m can be expanded and contracted, the buff device 10 is held by the legs 1m during buffing, and the legs 1m are contracted when the buff device 10 is transported. If the wheel 1r can be used, transportation becomes easy.
The

drive rollers

11A and 11B are connected to the output shafts of the

speed reducers

15b and 15b connected to the output shafts of the two

motors

15a and 15a of the drive roller rotating means 15, respectively, and rotate. The two

motors

15a and 15a are driven and controlled by a motor control device (not shown) so that the rotation speeds are substantially the same.
The tension roller 12 includes a fixed shaft 12a and a roller body 12b rotatably attached to the fixed shaft 12a. The fixed shaft 12a is connected to a slide member 16b of the tension roller moving means 16.

The

driving rollers

11A and 11B and the tension roller 12 are arranged in a triangular shape, and an annular tread (hereinafter referred to as a precure tread) vulcanized and formed in advance on the outside of the three

rollers

11A, 11B, and 12 is used. 20 is multiplied. In this example, the

driving rollers

11A and 11B are arranged on the base 1 side at a predetermined distance along the horizontal direction, and the tension roller 12 is arranged on the support member 3 side.
The precured tread 20 to be stretched is formed in an annular shape so that the surface 20a on the side where the tread pattern is formed is an outer peripheral surface and the surface 20b on the side bonded to the base tire is an inner peripheral surface. It shall be.

The

wire brushes

13A, 13B are arranged inside the triangle formed by the three

rollers

11A, 11B, 12 at a predetermined distance along the horizontal direction. When the precure tread 20 is set, the precure tread 20 is set. Are not in contact with the outer peripheral surfaces of the

wire brushes

13A and 13B.
Similarly to the tension roller 12, the receiving rollers 14 A and 14 B include a fixed shaft 14 a and a roller body 14 b that is rotatably attached to the fixed shaft 14 a, and the fixed shaft 14 a is fixed to the holding table 2. . The receiving

rollers

14A and 14B are arranged outside the triangle formed by the three

rollers

11A, 11B, and 12 so as to face the

wire brushes

13A and 13B directly below the

wire brushes

13A and 13B.

The drive roller rotating means 15 includes two sets of a motor 15a and a speed reducer 15b connected to the output shaft of the motor 15a. The output shafts of the

speed reducers

15b and 15b are connected to the

drive rollers

11A and 11B, respectively. Then, the

drive rollers

11A and 11B are rotated. The motor 15 a and the speed reducer 15 b are fixed to the base 1.
The tension roller moving means 16 includes a ball screw 16a, a slide member 16b rotatably fixed to the ball screw 16a, and a motor 16c. The motor 16c rotates the ball screw 16a to move the slide member 16b in the vertical direction. Thus, the tension roller 12 attached to the slide member 16b is moved in the vertical direction.
The hub member rotating means 17 includes two sets of

motors

17a and 17a and

speed reducers

17b and 17b, and a mounting base 17c to which the motor 17a and the speed reducer 17b are attached. The output shafts of the

motors

17a and 17a are connected to the

speed reducers

17b and 17b, and the output shafts of the

speed reducers

17b and 17b are connected to the

wire brushes

13A and 13B, respectively, to rotate the

wire brushes

13A and 13B. .
The hub member pressing means 18 comprises a cylinder device, the cylinder body 18 a is fixed to the support member 3, and the cylinder rod 18 b is connected to the mounting base 17 c of the hub member rotating means 17. When the cylinder rod 18b is expanded and contracted, the mounting base 17c moves up and down, and as a result, the

wire brushes

13A and 13B connected to the output shaft of the speed reducer 17b move up and down.

The shaving powder receiving tray 19 is a box-shaped container having an upper opening, and is placed on the base 1 directly below the buffing device 10 and shaved off the pre-cured tread 20 (buffed) by the

wire brushes

13A and 13B. (Powder).
In this example, the transparent case 4 provided with the door 4a covers and seals the buff device 10 and the base 1, the holding base 2 and the support member 3 from above, and the case 4 is provided with a hose introduction hole 4b. The suction hose 5b of the suction device 5 is introduced into the case 4 from the hose introduction hole 4b, and the swarf of the precure tread 20 is collected. Specifically, one end of the suction hose 5b is connected to a suction hole 19k provided with the shaving powder receiving tray 19, and the buff powder stored in the shaving powder receiving tray 19 is sucked and collected. A plurality of suction holes 19k may be provided to suck the buff powder stored in the shaving powder receiving tray 19.
The transparent case 4 is preferably removable from the base 1. In that case, if the transparent case 4 is attached to the base 1 using an O-ring or the like, the adhesion between the transparent case 4 and the base 1 can be improved by closing the door 4a and starting suction.

Next, an annular precure tread buffing method according to the present invention will be described.
First, as shown in FIG. 2A, the door 4 a (not shown) of the case 4 is opened, and the precure tread 20 is stretched around the drive rollers 11 A and 11 B and the tension roller 12 arranged in a triangular shape. At this time, the precure tread 20 is stretched over in a slightly slack state.
Next, the tension roller 12 is moved upward to elongate the precure tread 20, and tension is applied to the entire precure tread 20. By applying tension to the precure tread 20, pressure is applied to the

drive rollers

11A, 11B from the precure tread 20, so if the

drive rollers

11A, 11B are rotated, the precure tread 20 is moved to the three rollers 11A. , 11B, 12 while being held outside, can be rotated along the triangle formed by the three

rollers

11A, 11B, 12.
Then, as shown in FIG. 2 (b), after closing the door 4a (not shown), the

drive rollers

11A and 11B are rotated to rotate the precure tread 20, and the

wire brushes

13A and 13B are moved downward to The

brushes

13A and 13B are pressed against the inner peripheral surface of the precure tread 20. At this time, it is preferable that the wire brushes 13 A and 13 B are rotated in advance and then brought into contact with the precure tread 20. The rotation direction of the

wire brushes

13A and 13B is opposite to the rotation direction of the precure tread 20.
The suction device 5 may be operated immediately after the door 4a is closed, or may be operated when the

wire brushes

13A and 13B are moved.

Since the receiving

rollers

14A and 14B are arranged on the opposite side of the precure tread 20 across the

wire brushes

13A and 13B, even if the

wire brushes

13A and 13B are pressed against the precure tread 20, the receiving

rollers

14A and 14B. Receives the reaction force of the

wire brushes

13A and 13B, the precure tread 20 will not bend.
As a result, the precure tread 20 rotates while being held from the inner peripheral surface 20b side by the three

rollers

11A, 11B, and 12, and the

wire brushes

13A and 13B that rotate on the inner peripheral surface 20b of the precure tread 20 are rotated. Is pressed, the inner peripheral surface 20b of the precure tread 20 is buffed uniformly and without excess or deficiency.

The buff powder p of the precure tread 20 scraped off by the wire brushes 13 A and 13 B is stored in the scrap receiving tray 19.
When the door 4a of the case 4 is closed, the inside of the case 4 becomes a sealed space, so that the buff powder p does not scatter to workers working outside the case 4 and surrounding devices.
After the suction of the buff powder p is completed, the buff powder p stored in the shaving powder receiving tray 19 in the case 4 is sucked into the suction hole 19k and sent from the suction hose 5b to the suction device 5 and collected.
After buffing the inner peripheral surface 20b of the precure tread 20 for a predetermined time, the

wire brushes

13A, 13B are moved upward to move away from the inner peripheral surface 20b of the precure tread 20, and the

wire brushes

13A, 13B are rotated. Stop. Next, after stopping the rotation of the

drive rollers

11A and 11B, the tension roller 12 is moved downward to loosen the precure tread 20.
Finally, after opening the door 4a of the case 4 and taking out the precure tread 20 that has been buffed, the precure tread 20 to be buffed next is hung around the

drive rollers

11A, 11B and the tension roller 12.
In addition, it is preferable that the suction device 5 is stopped after about 1 minute has elapsed after the buffing is finished, and then the precure tread 20 is taken out.

As described above, in the first embodiment, the buffing device 10 includes the driving

rollers

11A and 11B, the tension roller 12, the

wire brushes

13A and 13B, the receiving

rollers

14A and 14B, the driving roller rotating unit 15, and the tension roller. The moving means 16, the hub member rotating means 17, the hub member pressing means 18, and the shaving powder receiving tray 19 are configured, and the precure tread 20 is moved from the inner peripheral surface 20 b side by the three

rollers

11 A, 11 B, and 12. While holding, the

drive rollers

11A and 11B are rotated to rotate the precure tread 20, and the

wire brushes

13A and 13B are pressed against the inner peripheral surface 20b of the precure tread 20 while being rotated to press the inner peripheral surface of the precure tread. Since 20b was buffed, the inner peripheral surface 20b of the precure tread 20 was leveled. And excessive or insufficient with it buffing no, it is possible to greatly improve the uniformity of the adhesion and shape compared to buffing by manually.
In addition, the buff device 10 is installed in the case 4, and the buff powder p of the precure tread 20 stored in the shaving powder receiving tray 19 is sucked by the suction hose 5b and sent to the suction device 5 for recovery. It is possible to prevent the buff powder p from being scattered to workers working outside the case 4 and surrounding devices. Therefore, the working environment can be greatly improved.

In the first embodiment, the annular member to be buffed is the precure tread 20, but the object to be buffed by the buff device 10 is not limited to the precure tread 20, and a rubber belt formed in an annular shape. The present invention is also applicable to an annular member having elasticity such as.
In addition to the

wire brushes

13A and 13B, other buffing members such as a grindstone can be used as the buffing member.
In the above example, the precure tread 20 is rotated by the three rollers of the two

drive rollers

11A and 11B and the tension roller 12 while holding the precure tread 20 from the inner peripheral surface 20b side. Although the inner peripheral surface 20b of the tread 20 is buffed, the number of rollers for holding the precure tread 20 from the inner peripheral surface 20b side is not limited to three, and a certain tension is applied to the precure tread 20. If so, there may be two or four or more. Also, the number of driving rollers may be one or three or more.
Further, the tension roller moving means 16 and the hub member pressing means 18 are not limited to the configuration of the above example, and other means such as a well-known rack and pinion mechanism or a slide means including a rail and a slider may be used.
In the above example, the

wire brushes

13A and 13B are moved up and down using the hub member pressing means 18, but the

wire brushes

13A and 13B may be moved back and forth. In this case, the diameter on the tip side of the

wire brushes

13A and 13B may be reduced. Accordingly, if the

wire brushes

13A and 13B are advanced in the direction of the precure tread 20, the

wire brushes

13A and 13B can be pressed against the inner peripheral surface 20b of the precure tread 20.

Embodiment 2. FIG.
In the first embodiment, the buffing apparatus 10 is used only for buffing the precure tread 20, but as shown in FIGS. 3A and 3B, the buffing apparatus 10 includes a precure tread after buffing. By providing the tread diameter expanding means 30 that expands and holds 20, the buff device 10 can be used as a tread diameter increasing device 10 Z used when assembled to the base tire 22 as shown in FIG. 4.
The tread diameter increasing device 10 Z includes a buff device 10, a tread diameter increasing means 30, a pedestal 6, and wheels 7. On the pedestal 6, the base 1 of the buff device 10 and the holding plate 33 of the tread diameter expanding means 30 are mounted. The base 1 of the buff device 10 is attached to the base 6 so as to be slidable in the front-rear direction which is the axial direction of the precure tread 20. That is, the entire buff device 10 can slide in the front-rear direction.
On the other hand, the holding plate 33 is fixed to the base 6. Moreover, the wheel 7 travels on the rail R for moving the tread diameter increasing device 10Z to the stand tire holding device 40 side.

The tread diameter expanding means 30 includes a plurality of holding members 31 that are in contact with the inner peripheral surface of the precure tread 20, a slide mechanism 32 that moves each holding member 31 to the outside in the radial direction of the precure tread 20, and these slides. And a holding plate 33 that holds the mechanism 32.
The holding member 31 is a part-like member that extends in the front-rear direction, which is the axial direction of the annular precure tread 20, and one end is attached to a slide member 32c of a slide mechanism 32 described later. In this example, the nine holding members 31 hold the precure tread 20 after buffing from the inner peripheral surface 20b side.
The holding plate 33 is a plate-like member having a semicircle on the upper side and a rectangle on the lower side when viewed from the front-rear direction, and a through-hole 33h centering on the center of the semicircle is provided therein. Yes. A ring-shaped portion between the through hole and the virtual circle including the semicircle is referred to as an annular portion 33r. In this example, the center of the through hole 33h is made to coincide with the center of a triangular circumscribed circle formed by the

drive rollers

11A and 11B and the tension roller 12, and the diameter of the through hole is larger than the diameter of the circumscribed circle. 33h was formed.

The slide mechanism 32 includes a rail base 32a, a rail 32b, a slide member 32c, and a cylinder device 32K.
One end of the rail base 32a is fixed to the annular portion 33r of the holding plate 33, the other end is inside a triangle formed by the driving

rollers

11A and 11B and the tension roller 12, and the

wire brushes

13A and 13B are movable. It extends to a position that avoids the range.
The rail 32b extends along the rail 32b starting from the end of the rail base 32a on the through hole 33h side, and terminates in the vicinity of the inner peripheral side of the through hole 33h.
The slide member 32c is a block-like member. One end of the holding member 31 is attached to the surface on the opposite side to the rail 32b, and the groove 32n that engages and slides on the protrusion 32m of the rail 32b on the surface on the rail 32b side. And is slidably attached to the rail 32b.
The cylinder body 32p of the cylinder device 32K is fixed to the ring portion 33r side of the rail base 32a, and the tip of the cylinder rod 32q is connected to the surface of the slide member 32c on the cylinder body 32p side.
Therefore, if the cylinder device 32K is operated to expand and contract the cylinder rod 32q, the holding member 31 moves between the inner side of the through hole 33h and the annular portion 33r side.

The holding member 31 is positioned inside the triangle formed by the three

rollers

11A, 11B, and 12 which are the tip positions of the rail base 32a until the buffing is finished. At this time, the cylinder rod 32q is in the most extended state.
In the state where the cylinder rod 32q is most contracted, the nine holding members 31 have a diameter of the circumscribed circle centered on the center of the triangular circumscribed circle formed by the driving

rollers

11A and 11B and the tension roller 12. The slide mechanism 32 is attached to the annular portion 33r of the holding plate 33 so as to be positioned at each apex of a regular pentagon inscribed in a circle having a diameter larger than the diameter of the through hole 33h.

Next, the operation of the tread diameter increasing device 10Z will be described. Since the operation of the buff device 10 is the same as that of the first embodiment, the description thereof is omitted.
After the buffing is finished, the

wire brushes

13A and 13B stop rotating and are moved upward, and the tension roller 12 is also moved downward. , 11B, 12.
When performing the diameter expanding operation, first, the suction device 5 is disconnected from the buff device 10, the case 4 is detached from the base 1, and the buffed precure tread 20 is re-hanged on the nine holding members 31. (Actually, the precure tread 20 is stretched over only the upper six holding members 31, and the lower three retaining members 31 are merely located inside the laid precured tread 20. is there).
Then, even if the diameter of the holding member 31 is increased, the base 1 is moved to the rear of the base 6 so as not to contact the

rollers

11A, 11B, 12, 14A, 14B and the

wire brushes

13A, 13B of the buff device 10. Thereafter, the cylinder device 32K is operated to contract the cylinder rod 32q and move the slide member 32c to the annular portion 33r side. Thereby, since the holding member 31 also moves to the annular part 33r side, the diameter of the precure tread 20 can be expanded.

When assembling the expanded precure tread 20 to the base tire 22, as shown in FIG. 4, a base tire that holds the base tire 22 by driving the wheels 7 of the tread diameter increasing device 10 Z. After moving in the direction of the holding device 40, the precure tread 20 is assembled to the base tire 22.
The base tire holding device 40 includes a drum 41 that holds the base tire 22, tread pressing means 42 that presses the precure tread 20 against the base tire 22, a drum shaft 43 that is connected to the central axis of the drum 41, and a drum shaft 43 Is held rotatably via a bearing (not shown), and a drum motor 45 for rotating the drum shaft 43 is provided.

Pulleys

46 and 47 are respectively attached to the end of the drum shaft 43 opposite to the drum 41 and the output shaft of the drum motor 45, and the pulley 46 and the pulley 47 are connected by a belt 48. The drum motor 45 and the drum shaft 43 may be directly connected.

The tread pressing means 42 includes a cylinder device 42a having a pressing member 42k at the tip of the cylinder rod 42q, and a frame body 42b for holding the cylinder device 42a. The frame body 42b includes an annular frame body 42m fixed to the outer periphery of the holding device body 44, and a support member 42n that protrudes from the frame body 42m toward the drum 41 and holds the cylinder body 42p of the cylinder device 42a. . In this example, six support members 42n are provided, and the cylinder device 42a is mounted on each support member 42n. In FIG. 4, only the upper and lower cylinder devices 42a and the support member 42n are shown.

When the precure tread 20 is assembled to the base tire 22, the tread diameter increasing device 10 Z is moved in the direction of the base tire holding device 40, and the precure tread 20 whose diameter has been increased is stopped at a position surrounding the base tire 22. After that, the slide mechanism 32 is operated to bring the holding member 31 into contact with the surface of the base tire 22. In this example, an adhesive for adhering the precure tread 20 and the base tire 22 is applied in advance to the base tire 22 side, and the surface of the holding member 31 is coated with a release agent.
Next, while extending the cylinder rod 42q of the tread pressing means 42 and pressing the pressing member 42k against the outer surface side of the precure tread 20, the tread expanding device 10Z is moved away from the base tire holding device 40, The holding member 31 sandwiched between the precure tread 20 and the base tire 22 is extracted. Thereby, the precure tread 20 is assembled to the outer peripheral surface of the base tire 22.
Thereafter, the drum motor 45 is driven to rotate the base tire 22, and a pressure roller (not shown) is brought into contact with the surface of the precure tread 20, so that the precure tread 20 is adapted to the base tire 22, and the precure tread. Complete 20 assembly.

As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the embodiment. It is apparent from the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

According to the present invention, the inner peripheral surface of an annular member such as a precure tread can be uniformly and sufficiently buffed, so that the quality of the buffed product can be improved. Moreover, since buffing can be performed automatically, productivity can be improved.

1 base, 2 holding base, 3 support member,
10 Precure tread buffing device, 11A, 11B drive roller,
12 tension roller, 13A, 13B wire brush,
14A, 14B receiving roller, 15 driving roller rotating means,
16 tension roller moving means, 17 hub member rotating means,
18 Hub member pressing means, 19 Chip receiving tray,
20 Precure tread.

Claims

Holding and rotating means for holding the annular member from the inner peripheral surface side, and rotating the annular member around the axial direction of the annular member;
A buff member that rotates while contacting the inner peripheral surface of the annular member,
The holding / rotating means is
A plurality of inner rollers arranged on the inner peripheral surface side of the annular member and extending in the axial direction of the annular member;
An outer roller disposed on the outer peripheral side of the annular member with the buff member and the annular member interposed therebetween and extending in the axial direction of the annular member;
At least one of the inner rollers is a drive roller that rotates around a rotation axis parallel to the axial direction of the annular member to rotate the annular member held by the inner roller,
The buff member is
A buffing device for an annular member that rotates about a rotation axis parallel to the axial direction of the annular member.
A case for sealing the holding and rotating means;
The baffle of the annular member according to claim 1, further comprising a suction unit that has a cylindrical body that communicates with a suction port provided in the case and sucks the shavings generated in the case. apparatus.
While rotating the precure tread while holding the annular precure tread from the inner peripheral surface side, the buff member is pressed against the inner peripheral surface of the precure tread while rotating the inner peripheral surface of the precure tread. A buffing method of precure tread, characterized by buffing.
Inside the sealed box, the inner peripheral surface of the precure tread is buffed, and the shavings generated by the buffing are collected by sucking from a suction port provided in the box. The precure tread buffing method according to claim 3.
A plurality of inner rollers that rotate while holding the annular precure tread from the inner peripheral surface side; and
A buff member that rotates while contacting the inner peripheral surface of the precure tread;
An outer roller disposed between the buff member and the precure tread on the outer peripheral side of the precure tread;
A tread diameter expanding means for expanding and holding the precure tread,
The tread diameter expanding means is
A plurality of holding members in contact with the inner peripheral surface of the precure tread;
And a means for moving the plurality of holding members outward in the radial direction of the precure tread after buffing.