JP3280066B2 - Tire shoulder cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire shoulder portion cutting device for cutting a pattern residue of a tire shoulder portion, and more particularly, to a method of cutting a pattern residue of a shoulder portion of a heavy load tire such as a bus or a truck with high precision. And a tire shoulder cutting device capable of effectively preventing the occurrence of quality defects.

[0002]

2. Description of the Related Art Conventionally, tires for heavy loads, such as buses and trucks, are expensive, so that worn and worn tires are reclaimed and reused as retreaded tires. Buffing in manufacturing a retreaded tire is extremely important in terms of the performance of a regenerated tire. For example, if a breaker or a belt cord is excessively cut to obtain an appropriate buff size by cutting the remaining pattern of the tread, the adhesive force with newly attached tread rubber is reduced, which causes tread separation. On the other hand, if the thickness of the remaining tread rubber is too large, heat generation during running becomes high, causing separation. Further, if the crown width is not finished as specified, tread separation may be caused, and in addition, early wear and vibration problems may occur, so that the influence on the retreaded tire is extremely large.

Conventionally, the following two methods are generally known for cutting the remaining pattern of a tire shoulder portion. (1). An operator cuts the remaining pattern of the tire shoulder with a grinder. (1). A template-type high-speed buffing machine that buffs a tread pattern, and cuts off the remaining pattern on the tire shoulder.

[0004]

However, in the case of the above (1), a great burden is imposed on the worker, the worker is greatly fatigued, and tendonitis may be caused. Had the problem of being extremely bad. Also,
In the case of (2), there is a problem that the quality of the rubber layer is deteriorated due to excessive shaving, and there is a possibility that the belt cord may be damaged.In addition, since the tread pattern and the shoulder pattern are also used for cutting, the blade is Replacement is frequent, the work efficiency is poor, and the tread pattern cutting operation efficiency of an expensive high-speed buffing machine whose main purpose is to remove the originally remaining tread pattern is reduced.

The present invention has been devised in view of such a conventional problem, and it is possible to accurately prevent the pattern remaining in the tire shoulder portion and to effectively prevent the occurrence of poor quality without relying on humans. It is an object of the present invention to provide a tire shoulder portion cutting device that can be used.

[0006]

In order to achieve the above object, the present invention provides a tire supporting means for rotatably supporting a vertically erected tire on a base. A base plate that can be moved up and down along a guide member that is vertically provided through means is provided, and a driving hand is provided on at least one side of the base plate.
It is expanded in the tire width direction via a link mechanism connected to the step.
A pair of left and right cutting means arranged so as to be able to move
The cutting means can be driven to rotate, and the height, mounting angle and
The gist of the present invention is to provide a cutting tool whose tilt and inclination can be adjusted .

[0007]

According to the present invention, the tire supported by the tire support means rotates, the pair of left and right cutting means descends, and moves in the width direction of the tire to rotate the cutting tool. While the shoulder portion of the tire is sequentially cut from a radially inner portion to an outer portion at a predetermined pitch, the remaining pattern of the shoulder portion can be cut and removed.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a tire shoulder portion cutting device according to the present invention. The device 1 includes a tire supporting means 10 which rotatably supports a tire (base tire) T standing upright on a base 2 in a vertical direction. Is provided.

As shown in the schematic explanatory view of FIG. 2, the tire supporting means 10 includes a frame 11 erected on the base 2.
A drive roller 13 for rotating and supporting the tire T is fixedly mounted on the distal ends of two rotating shafts 12 supported horizontally in the horizontal direction. The drive roller 13 is provided with a pair of flange members 14 for centering the mounted tire T so as to be movable and fixed in the axial direction of the drive roller 13.

At the rear end of each rotating shaft 12,
A sprocket 15 is provided.
Is a drive shaft 17 of a drive motor 16 disposed on the base 2.
And is engaged with an endless chain 19 wound around a sprocket 18 fixed to the drive roller 13 to enable the drive roller 13 to rotate. A rotatable pressing roller 20 for pressing the tire T is provided below the driving roller 13 in parallel with the driving roller 13. The pressing roller 20 is a rod member 22 of a fluid pressure cylinder 21 provided on the base 2 adjacent to the frame 11.
And can be moved up and down in the vertical direction.

A support frame 30 is erected on the frame 11 adjacent to the support means 10, and a distal end of the support frame 30 is provided with a hydraulic cylinder or the like capable of vertically moving a rod 32 through a mounting member 31. Elevating means 33 is provided. At the lower end of the rod 32, a rectangular plate-shaped base plate 34 is vertically provided. This base plate 34 is vertically provided between the frame 11 and the mounting member 31.
The guide member 35 is fixed to a support member 36 that can slide along the guide member 35.

The opposite side surface 3 of the base plate 34
Above 4a, 34b, a pair of left and right air cylinders (drive means) 40 each having a rod 41 which can be extended and contracted in a direction intersecting downward are provided. At the tip of the rod 41 of the air cylinder 40, an arm 4
2 are connected, and the arms 42 are arranged to cross each other in a cross shape. The intersection is supported by a support piece 43 fixed to the base plate 34 to form a link mechanism L. And the rod 4 of the arm 42
Two guide wheels 44 rotatably supported for smoothing the movement of the link mechanism L are provided on the distal end side opposite to the one side. Therefore, the distal end of the arm 42 can expand and contract in the width direction of the tire T supported by the tire supporting means 10 by the expansion and contraction of the rod 41 of the air cylinder 40.

At the tip end of the arm 42, there is provided cutting means 50 having a cutting tool 51 which can rotate and cut the shoulder S of the tire T. The cutting means 50 is provided on the side surfaces 34a and 34b of the base plate 34. Each pair). As shown in FIG. 3, the cutting means 50 includes a flat-round type cutting tool 51 detachably mounted on a rotating rod 53 of an air motor 52. The air motor 52 is connected via a U-shaped support bracket 54. Support rod 55
It is fixed to.

The support rod 55 is fixed to the fixing block 5.
6 is supported by a rod member 58 fixed by a fixing screw 57 so that the fixing position can be adjusted in the circumferential direction. The support rod 55 is also attached so that the distance from the rod member 58 to the air motor 52 can be adjusted by a fixing screw 59 provided on the distal end side of the rod member 58. The fixing block 56 is attached to the tip of the arm 42 by a fixing screw 60 so that the fixing position can be adjusted in the longitudinal direction of the arm 42. Therefore, the height, angle, and inclination of the cutting tool 51 can be arbitrarily adjusted.

Reference numeral 70 designates a drive system of the apparatus 1.
Control means for controlling in order, L ₁Is the base plate
L, a limit switch for regulating the upper limit of 34_TwoIs
Limit switch that regulates the lower limit of base plate 34
Cutting tools of the cutting means 50 for each group, ie, for each type of tire T
51 designates the cutting start position at the shoulder S of the tire T.
Limit switches, P is the pattern of the shoulder S
It is the rest.

Next, the operation of the tire shoulder portion cutting device 1 having the above configuration will be described. First, depending on the type of the base tire T from which the shoulder portion S is cut, the position, the angle, and the like of the cutting tool 51 may be adjusted by a screw, and the base tire T may be attached to the drive roll 13 of the tire support means 10 by a flange member. Set by centering with 14. In this state, the control unit 70 starts the operation after selecting a switch corresponding to the type of the base tire T.

In the tire support means 10, the pressurizing roller 20 is lowered by operating the fluid pressure cylinder 21, and abuts against the inner peripheral portion of the base tire T to hold and support the lower side of the base tire T. Subsequently, the drive motor 16 is driven to rotate, and the two drive rollers 13 are driven via the chain 19 and the rotation shaft 12.
Is driven to rotate, and the base tire T rotates at a low speed. At this time, the base plate 34 waiting at the upper limit position regulated by the limit switch L ₁ is lowered by the operation of the lifting / lowering means 33. Projection of the base plate 34 are in contact with one of limit switches cutting position corresponding limit switch group L ₂ of the type of tire casing T is determined person, lifting means 33 is stopped, the base plate 34 stops descending .

The air motor 52 of the cutting means 50 is driven to rotate to rotate the cutting tool 51, and the air cylinder 40 is operated.
Moves in the width direction of the base tire T by a predetermined distance so that the opposing members contract the width, and abuts on the shoulder portion S of the base tire T to start cutting. Therefore, the shoulder portion S is cut from the inside in the radial direction.

When the cutting of the outer shoulder portion S (removal of the pattern remaining portion P) is completed by the low-speed rotation of the base tire T, the cutting tool 51 of the cutting means 50 is moved in the radial direction by a predetermined pitch set in advance. Move inward. That is, after a predetermined time (equivalent to one rotation of the base tire T) has elapsed by a timer provided in the control means 70, the cutting tool 51 is raised by a predetermined interval by the elevating means 33. Rod 4 by operation
Due to the contraction of 1, the tire moves inward in the width direction of the base tire T, and the shoulder portion S is cut again.

In a heavy load tire, the cutting range of the shoulder portion S is about 30 to 60 mm, and the amount of one movement is about 3 mm.
It is performed in any of the above ranges. Cutting, moving,
Cutting is repeatedly performed by the cutting means 50 to cut the pattern remaining portion P of the shoulder portion S. When the cutting is completed to a distance corresponding to the initially set cutting width of the shoulder portion S, the air motor 52 of the cutting means 50 , And the drive motor 16 of the tire support means 10 is stopped, and the rotation of the cutting tool 51 and the base tire T is stopped. Further, the air cylinder 40 operates to extend the rod 41, the cutting tool 51 of the cutting means 50 returns to the initial cutting standby position, and the elevating means 33 operates to raise the base plate 34, thereby causing the uppermost standby position to rise. To return to.

When the cutting tool 51 of the cutting means 50 does not contact the shoulder S of the base tire T, the height, angle, or angle at which the cutting tool 51 is mounted is fixed by the fixing screws 57, 59, and 60. The shoulder portion S is cut by adjusting the inclination. As described above, according to the present invention, the tire supporting means 10 for rotatably supporting the base tire T standing upright on the base 2 is provided, and the tire supporting means 10 is provided vertically above the tire supporting means 10 via the elevating means 33. A base plate 34 that can be moved up and down along a guide member 35 erected at a position is provided, and a pair of left and right cutting means 50 provided with a cutting tool 51 that can be driven to rotate is provided on at least one side surface 34 a of the base plate 34. Since the means 50 is disposed so as to be able to expand and contract in the width direction of the base tire T via the link mechanism L connected to the driving means 40, the pattern remaining portion P of the tire shoulder portion S can be accurately measured without relying on humans. By cutting well, it is possible to effectively prevent the occurrence of poor quality. The cutting means 50 may be disposed at least on one side surface 34a (34b) of the base plate 34, and the present invention is not limited to the above-described embodiment, but may be implemented in other forms. It is a good thing.

[0022]

According to the present invention, as described above, a tire supporting means for rotatably supporting a vertically erected tire is provided on a base, and the tire supporting means is provided vertically above the tire supporting means via an elevating means. A base plate that can be moved up and down along an upright guide member is provided, and a link mechanism connected to driving means is provided on at least one side of the base plate.
The left and right sides arranged to be able to move in the width direction of the tire
Equipped with a pair of cutting means, which can be driven to rotate
Cutting machine with adjustable height, mounting angle and inclination
Since the components are provided , the following excellent effects can be obtained. (1) It is possible to greatly improve the workability and productivity in buffing by eliminating a great burden on the operator. (2). It is possible to effectively prevent excessive cutting and the occurrence of poor quality, accurately cut the remaining pattern of the tire shoulder portion, and reduce the cost of using new rubber. (3) The expensive high-speed buffing machine can be operated efficiently, and the tread pattern cutting operation efficiency of the high-speed buffing machine can be greatly increased. (4) Small and inexpensive cutting tools can be used without the need for special cutting tools. (5) Compared to cutting the shoulder portion of the tire by the high-speed buffing machine, the power consumption is much smaller and energy saving can be achieved. (6) In addition, the cutting tool that can be driven in rotation is the size of the tire
Height, mounting angle and tilt can be adjusted according to the shape and shape
Can always perform high-precision cutting.
You.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tire shoulder portion cutting device according to the present invention.

FIG. 2 is a schematic explanatory view of a tire supporting means.

FIG. 3 is an enlarged perspective view of a cutting unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Tire shoulder part cutting device 2 Base 10 Tire support means 33 Elevating means 34 Base plate 35 Guide member 40 Driving means 50 Cutting means 51 Cutting tool L Ring mechanism S Shoulder part T Tire (base tire)

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B23B 5/00 B29D 30/68 B24B 19/02

Claims (1)

(57) [Claims] 1. A tire supporting means for rotatably supporting a vertically erected tire on a base is provided, along a guide member vertically provided above the tire supporting means via an elevating means. the vertically movable base plate is provided, on at least one side of the base plate Te, driving hands
It is expanded in the tire width direction via a link mechanism connected to the step.
A pair of left and right cutting means arranged so as to be able to move
The cutting means can be driven to rotate, and the height, mounting angle and
A tire shoulder part cutting device provided with a cutting tool whose inclination and inclination can be adjusted .