JP2815537B2 - Tire holding device in tire cutting device - 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 holding device in a tire cutting device using a wire cutting mechanism or the like.

[0002]

2. Description of the Related Art Heretofore, when cutting tires due to the necessity of research and development or sampling quality inspection on a production line, it has been general to cut them using a band saw or a circular saw. In this case, the tire is manually cut without using a fixing device or the like, or the tire is fixed to a support mechanism and cut. However, in this conventional technique, since the sidewall portion of the tire was not sufficiently held, it was practically difficult to stably obtain a clean cut surface due to its flexibility. Moreover, the fixing operation itself for fixing the tire to the support mechanism has never been an easy operation. Therefore, recently, the present applicant has proposed a method of cutting while holding the bead portions on both sides of the cutting line. According to this proposal, the tire is held in a state where it sufficiently responds to the flexibility of the sidewall portion, so that a clean cut surface can be easily obtained. However, as a result of adopting the holding method of clamping the bead portions on both sides of the cutting line, a certain amount of clamping was required on both sides of the cutting line. For this reason, it is mechanically impossible to cut thinner than the clamp margin, and there has been a surface that cannot meet the demand for making the cut width of the cut sample as thin as possible.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and reduces the cost of clamping.
It is an object of the present invention to provide a tire holding device capable of further reducing the thickness of cutting.

[0004]

According to the present invention, there is provided a clamp mechanism for holding one of the right and left sides of a cutting line, and a metal member which is located on the opposite side of the clamp mechanism and the cutting line and is exposed on an end face of the tire. A member is provided with a suction holding mechanism using a magnet that can be sucked, and the tire is held by the holding force of the clamp mechanism and the suction force of the magnet.

[0005]

The clamping margin on the magnet side is unnecessary, so that the cutting can be made with a smaller cutting width by bringing the cutting line closer to the magnet side.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a main part of an embodiment of the present invention, and FIG. 2 is a plan view thereof. In the drawing, reference numeral 1 denotes a base portion of the present apparatus, on which a slide base 2 is slidably supported, and which is moved forward and backward with respect to a cutting wire described later by an appropriate feed mechanism. It is configured. Also,
A support table 3 for supporting a tire is slidably supported on the slide base 2, and is configured to operate left and right by an appropriate feed mechanism. That is, the support table 3 for supporting the tires is configured to be able to move back and forth, left and right with respect to the base 1 by respective feed mechanisms. In the figure, reference numeral 4 denotes an operation panel on which conditions relating to the feed are set. Reference numeral 5 denotes a front-back guide mechanism, and reference numeral 6 denotes a dust collecting portion for chips.

A contact portion 7 is provided at the periphery of the support table 3.
The tire 8 is set on the support table 3 in a state where the peripheral portion of the tire 8 is in contact with the contact portion 7. On one side of the support table 3, an elevating mechanism 9 operated by a driving cylinder or the like (not shown) is provided.
Clamp mechanism 12 via arm 10 and support 11
13 can be moved up and down. The support 11 is fixed to the arm 10 via fixing means 14 so as to be adjustable back and forth. The clamp mechanisms 12 and 13 are supported on the support 11 so as to be vertically adjustable. In the figure, reference numeral 15 denotes a pressing means added as required, which is disposed to face the contact portion 7 and presses and supports the tire 8 with the contact portion 7.

In FIG. 1, reference numeral 16 denotes an endless cutting wire having CBN or the like fixed to its surface, and is stretched by a driving pulley 18 connected to a driving motor 17 and intermediate pulleys 19 and 20 so as to rotate at an ultra-high speed. . In addition, the intermediate pulley 1
9 and the intermediate pulley 20 are supported by support mechanisms 21 and 22, respectively.
Movably in the front-rear direction. The weight of the weight 24 acts on the intermediate pulley 19 via the cable 23, whereby the tension of the cutting wire 16 is adjusted to be constant. Also, the intermediate pulley 20
Is configured to be able to adjust forward and backward by rotating the operation handle 25 and by rotating a screw feed shaft 27 connected to a rotating shaft 26 thereof through a suitable transmission means such as a worm wheel. I have. By this operation, the cutting inclination angle of the cutting wire 16 can be adjusted. In the figure, 28,
29 is a guide roller for the cutting wire 16, and 30 is a slit provided on the support table 3 corresponding to the cutting wire 16.

FIGS. 3 to 5 show a holding device of the tire 8 at the cutting section, which is a plan view, an enlarged front view, and a longitudinal sectional view, respectively, of a main part. The feature of this device is that, as shown in FIG.
One side of the clamp mechanism 12, 13 and the pressing means 1
5 is that the other side is held by a suction holding mechanism 31 using a magnet. That is, one side of the cutting line A-A is, as shown in FIG.
33 is the holding claw 3 of each of the clamp mechanisms 12 and 13.
Insert between 4, 35 or 36, 37 and clamp by reducing the spacing. Further, the pressing means 1
5 is operated to press and hold the crown portion 38 of the tire 8 with the contact portion 7.

On the other hand, the other side of the cutting line AA is, as shown in FIGS. 3 and 4, by the magnets 39 and 40 of the suction holding mechanism 31, and as shown in FIG. Is held by suction through a metal member such as a steel cord 41 buried in the crown portion 38 exposed on the end surface. The magnets 39, 40 are made of permanent magnets or electromagnets, and are mounted on a mounting base 43 movably left and right by an operating cylinder 42.
Is attached to the distal end of the operating arm 45. When the holding position of the tire 8 is moved, the rotation actuator 44 and the operation cylinder 42 are operated to operate the magnet 39,
40 can be retracted like a chain line. In addition, a clamp mechanism (not shown) similar to the clamp mechanisms 12 and 13 is disposed symmetrically with respect to the cutting line AA so as to be able to advance and retreat, and is configured to be selectively usable with the suction holding mechanism 31. be able to.

As described above, one side of the tire 8 is held by the clamping mechanisms 12 and 13 and the pressing means 15 across the cutting line AA, and the other side is held by the suction holding mechanism 31 using the magnets 39 and 40. Then we will start the next cutting operation. At this time, before and after the holding operation of the tire 8, a cutting line A-A with respect to a cutting position of the cutting wire 16 is provided.
, That is, the position adjustment of the tire 8 with respect to the cutting wire 16 is performed. In this case, since the magnets 39 and 40 hold the end face of the tire 8 by the magnets 39 and 40 as in the related art, a cutting line AA can be set at a position where a desired cutting width is small.

However, at the start of the cutting operation,
First, the operation handle 25 is rotated to move the intermediate pulley 20 forward, and the cutting wire 16 is set at a predetermined inclination angle as shown by the solid line in FIG. As the intermediate pulley 20 advances, the intermediate pulley 19 also advances against the action of the weight 24,
The tension of the cutting wire 16 is kept constant. Thereafter, the support table 3 is advanced by an appropriate feed mechanism such as the above-described screw feed mechanism (not shown), and cutting is started near the shoulder portion 46 of the tire 8. In this case, since the cutting wire 16 is inclined, the contact area at the time of starting cutting with the tire 8 is small, so that extremely smooth start of cutting can be obtained. In this way, after the start of cutting, when the cutting has progressed to an appropriate cutting amount, the operating handle 25 is rotated in the reverse direction to retract the intermediate pulley 20 as necessary, so that the cutting wire 16 can be raised in the vertical direction and the cutting can be advanced at an appropriate inclination angle. When the cutting operation is completed, the intended cut portion is peeled off from the magnets 39 and 40 and used as a cut sample. Further, the support table 3 is retracted to return to the initial state, the clamp mechanisms 12, 13 and the pressing means 15 are released, the suction holding mechanism 31 is retracted, and the position of the tire 8 is adjusted to the next cutting position. Then, proceed to the next cutting preparation. When the cutting of all the cut portions is completed, the lifting mechanism 9 is raised, the next tire 8 is set, and the above cutting operation is repeated.

In the above description, the magnets 39,
Although the example in which the steel cord 41 is adsorbed to the steel cord 41 embedded in the crown part 38 exposed on the end face of the tire 8 has been described,
Bead wires 47, 4 embedded in bead portions 32, 33
It is also possible to adsorb to other metal members such as 8. Further, the shape and number of the attracting surfaces of the magnets can be changed as appropriate. Further, with respect to the feed mechanism for cutting, the case where cutting is performed by advancing the support table 3 side has been described. However, the feed mechanism is provided on the wire cutting mechanism side, and cutting is performed by advancing the wire cutting mechanism side. Such a configuration is also possible. Further, the cutting feed mechanism and the moving mechanism of the intermediate pulley 20 may be linked to each other to automatically adjust the cutting position of the cutting wire 16 and the cutting inclination angle in association with each other. is there.

[0014]

According to the present invention, the following effects can be obtained based on the configuration. (1) The tire can be cut thinner, and the degree of freedom in setting the cutting width is greatly increased. (2) Since the end face of the tire is held by being attracted by the magnet, the holding operation is extremely simple.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a main part of an embodiment of the present invention.

FIG. 2 is a schematic plan view of FIG.

FIG. 3 is a schematic plan view showing a main part of a tire holding mechanism.

FIG. 4 is a partially enlarged front view of FIG. 3;

FIG. 5 is a longitudinal sectional view showing a main part of a tire holding mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base part, 3 ... Support table, 7 ... Contact part, 8 ... Tire, 9 ... Elevating mechanism, 12, 13 ... Clamp mechanism, 15 ...
Pressing means, 16: cutting wire, 17: drive motor, 1
8: drive pulley, 19, 20: intermediate pulley, 24: weight, 25: operation handle, 31: suction holding mechanism, 32,
33 ... bead part, 34-37 ... holding claw part, 38 ... crown part, 39, 40 ... magnet, 41 ... steel cord, 42
... working cylinder, 43 ... mounting base, 44 ... rotary actuator, 45 ... working arm

Claims (1)

(57) [Claims] 1. A clamp mechanism for holding one of the right and left sides of a cutting line, and a magnet which is located on the opposite side of the clamping mechanism with respect to the cutting line and which can be attracted to a metal member exposed on an end surface of the tire. A tire holding device for a tire cutting device, comprising: a suction holding mechanism that holds a tire, and holding the tire by the holding force of the clamp mechanism and the suction force of the magnet.