JPS59192549A - Siping apparatus - Google Patents

Abstract

PURPOSE:To simplify the structure and to make it possible to carry out the adjustment or change without scattering the siping depth, by providing an arcuate sliding sled having a prescribed curvature that can be reciprocated in the direction normally to the siping direction, and projecting siping cutters into a prescribed maximum siping depth. CONSTITUTION:A cutter table 9 of a siping apparatus B is guided in a reciprocative manner in the siping direction by a pair of front and rear guide rods 43, 43 supported by a bracket 42... on a truck 10 and is reciprocated by a cylinder 44 fixed to the truck 10. The reciprocative positions are limited by limit switches 41a, 41b. At the forward section of the cutter table 9, an arcuate sliding sled having a prescribed curvature is supported by brackets 51, 51, and part of a disk cutter 7 is projected from an intermediate opening 8a of the sliding sled 8 in conformity with a prescribed maximum siping depth. By moving the disk cutter 7 together with the cutter table 9 in the siping direction subtly to follow the curvature of the tread surface 1a of a tire 1, the sliding sled 8 restricts the curvature thereof.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides microsiping (i.e., fine cuts) on the peripheral tread surface of new tires or retreaded tires for the second purpose of improving slip resistance. This invention relates to a siping device that directly applies siping.

(Prior art) Conventionally, the method of applying siping as described in -1- was such that an operator applied a ruler to the surface of the tread and made a cut to a predetermined depth with a knife, but this method , the siping depth tends to vary, it is not easy to change the siping cross section to an arbitrary depth, and it is difficult to apply deep siping or shallow siping depending on the part of the tire tread. There were drawbacks such as.

In addition, attempts to automate this type of siping work include, for example, the Japanese Patent Publication No. 51-1973. There is a siping machine disclosed in Japanese Patent No. 37947, but it has drawbacks such as the inability to easily change or adjust the siping depth.

In order to solve such problems, the present applicant proposed in Japanese Patent Publication No. 56-5660 that the structure is simple and can be manufactured at low cost, and the siping depth can be easily adjusted or changed. We proposed an automatic siping device for the purpose of However, this siping device is for applying siping to the surface of a flat sheet-like pre-cured tread for retreaded tires, and is not for directly applying siping to the curved tread surface of new or retreaded tires. It was difficult to adapt.

(Object of the Invention) The present invention relates to a siping device for directly applying siping to the circumferential tread surface of a new tire or a retreaded tire. The basic objective is to ensure that there is no variation in the siping depth and that the siping depth can be easily adjusted or changed.

(Structure of the Invention) For this reason, the present invention provides an arcuate sled having a predetermined curvature so as to be movable back and forth in the sipe direction and in the curved direction perpendicular to the sipe direction. The present invention is characterized in that a sipe cutter is provided to protrude from the sled to correspond to a desired maximum sipe depth.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the attached f=1 drawing.

As shown in Figures 1 and 2, the tire setting device
1 includes a tire support (11 and 1) that rotatably supports the tire 1 within the ridge surface by a rim 2.3, and an intermittent rotation mechanism 5 that rotates the tire 1 intermittently at a predetermined angle. It will be done.

The siping device B uses a disc cutter 7 rotated by a motor 6 and controls the depth of siping by the disc cutter 7 by following the tread surface 1a of the tire 1! ] A cutter stand IJ supporting the sled 8 and the cutter stand 9
10 for a table that reciprocates in the siping direction (left and right direction)
, the trolley 10 is reciprocated in the executive direction perpendicular to the siping direction, and the guide rail 11 is
and an angle changing mechanism 12 that adjusts the sipe angle to a predetermined angle to change the sipe angle of the disc cutter '7.

The tire support mechanism 4 of the tire setting device A rotatably supports the drive shaft 183- to which the rim 2 is fixed on the support stand 17 on the left side in the figure of the base stand 16 installed on the work floor 15. A piston rod 21 of a cylinder 20 fixed to a support stand 9 on the right side of the base 16 supports the rim 3 so as to be freely rotatable and reciprocating.

The rims 2 and 3 are formed with, for example, small diameter rim portions 2a and 3a for tube tires, and large diameter rim portions 211.31 for tubeless tires, for example.

On the base 16 corresponding to the fixed rim 2 on the left side, a lift cylinder 22 and a link member (not shown) are provided with a lid 23 that can be raised and lowered. When the tires 1 are stacked vertically on the rims 1 and the lifter 23 is raised by 1" by operating the foot valve, the center of the tire 1 is aligned with the rims 2 and 3.
The forward movement of the rim 3 by the sill 20 causes the bead portion of the tire 1 to fit into the rim 2.3 and come off with support.

As shown in FIG. 3, the intermittent rotation mechanism 5 of the tire setting device A has a first deceleration l! 26, connect the second reduction gear 27 with the chain 30, and connect the pulley 28 of the second reduction gear 27 and the pulley 29 of the drive shaft 18 of the tie tire support horizontal 4 with a chain 30; A pulse counter 31 is attached to the speed counter 26.

To explain with reference to the control block of FIG.
First deceleration I! 26 rotates, for example, 1000 times, the drive shaft 18 rotates 1. Assuming that the reduction ratio is set together with the second reduction gear 27 so as to rotate /360 rotations (1 degree), the pulse counter 31 calculates the number of rotations of the first reduction gear 1 and 26 = the number of pulses, and the control circuit 33 pulse comparison section 3
4, compare it with the setting pulse of the pulse setting device 32 and 10 (
The clutch of the motor 25 is disengaged and the brake is applied every 10 pulses to temporarily stop the drive shaft 18 and the siping interval is set to 1.
At the same time, the pulse integrator 35 of the control circuit 33
Accumulate Palless and 360. (with IQO pulse)
Disconnect the clutch of the motor 25 and apply the brake to the drive shaft 1.
8 can be completely stopped in one rotation to complete the siping work.

If tire 1 is divided into 360 equal parts, the siping spacing force is q degrees] ('1 f) 1
200 pulses, 12 (in the case of 1 equal division, 3 degrees is 3 (1 + l)
('l pulse may be used.

Intermittent rotation (geometry 5 is, as shown in FIG.
Similarly, the drive shaft 18 may be connected to the pulley 28, 2≦ and the chain 3 ().

The constant rotation motor 3 ((1) is configured to rotate at a certain number of rotations according to the start signal, and the drive shaft 18 can be similarly rotated intermittently via the reduction gear li3; -;. In this case To change the siping interval, change the gear ratio of the change gear 37, and one rotation of the drive shaft 18 is controlled by the limit switch and the beam fitting 39 of the drive shaft 18.
Detect when 10 is kicked.

Returning to FIGS. 1 and 2, the cutter base 1 of the siping device B described in I- is supported by the brackets of the truck 1 +'1-l-), 42, . . . , 42. It is reciprocally guided in the sipe direction (left and right direction) by front and rear power rods 4'A and 43, and reciprocated by a cylinder 44 fixed to the truck 1 (). Reciprocating position beam switch 4
], a, 4. Controlled by i and b.

A disc cutter is disposed at the front of the carp cutter stand 9, and the disc cutter 7 is connected to the motor 6 via pulleys 45 and 46 and a belt/17, and includes a tire shaft as shown in FIG. A predetermined angle (e.g. 0~
A spray nozzle 48 is installed in front of the disk cutter 7, which is rotated at high speed in a plane adjusted to 40 degrees), in the llj to 1nJ direction (arrow), and sprays water onto the siping part to generate smoke. This is intended to prevent this and to cool the disc cutter 7.

As shown in FIG. 3, in the front part of the cutter table 9, an arcuate sled 8 having a predetermined curvature is supported by brackets 51 and 51, and the center opening of the sled 8 is supported by brackets 51 and 51. 8a, a portion of the disc cutter 7 is made to protrude in accordance with the desired maximum siping depth.

The sled 8 is cut by a disc cutter 7 following the curvature of the tread surface 1a7- of the tire 1 as shown in FIG.
By slightly moving the siping with the cutter base 5J in the ipping direction, the siping depth is adjusted so that the shoulder part of the tire 1 is shallow and the center of the tread is the deepest (indicated by the dotted line 0). The curvature of the verisori 3; is controlled so as to

If the curvature of the verisori 8 described in 2 is set small (approximately to a straight line), the siping shape will become as shown by the dashed line P (1), and if the curvature of the verisori 8 is set to a large value (for example, the sipe shape of the disc cutter 7) curvature), the siping shape becomes as shown by a two-dot chain line Q.

The trolley 10 of the siping device B is changed in angle (some 1
2, the idle rail 11 is held between rollers 51J, . 54 to move back and forth. The reciprocating position is a limit switch 55a.

55b.

The cylinders 54 and 54 are operated at this low pressure of 8/cm as I=2, and the above-mentioned sled 8 follows the tread surface 1a of the tire 1, and a return force is applied to the truck 1° via the cutter stand 9. The operating force of the applied sharpening cylinders 54, 54 is overcome so that the truck 10 is lightly moved back.

The angle changing mechanism 12 of the siping device B is provided with rising brackets 1-57. A long groove 58.58 having a radius of is formed, and via the long groove ss, 58
-Adjust the idle rail 11 to an appropriate angle and tighten the bolts 60.
etc., and the angle (siping angle) θ of the disc cutter 7 can be changed in the range of ( ) to 40 degrees with respect to the plane containing the tire axis, as shown in FIG. Second
The figure shows the case where the cutter angle (siping angle) is )° with respect to the plane containing the tire axis. Note that the long grooves 58 and 58 are marked with scales corresponding to the sipe angle.

When the tire setting device A and the siping device B are configured as described above, the truck 10 is initially placed in the backward position by the cylinder 54, and the cutter table 9 is placed in the right standby position (forward position) by the cylinder 44.

The tires 1 are stacked vertically on a lifter 23 and raised, the rim 3 is moved forward by a cylinder 20, the tire 1 is fitted and supported by the rims 2 and 3, and air is injected into the tire 1 to apply internal pressure.

Next, when the carriage 1 ( ) is advanced by the cylinder 54 (forward position) and the cutter table 9 is moved leftward by the cylinder 44 , the skid sled 8 hits the tread surface 1 a of the tire 1 .
The disc cutter 7 is delicately moved following the curvature of the tread surface 1a, and sipes are formed on the tread surface 1a in a shape where the shoulders are shallow and the tread center is deep.

When the cutter table 9 traverses to the left position (return position), the cylinder 54 moves the cart 10 backward (return position), and the cylinder 44 causes the cutter table 9 to traverse to the right standby position (forward position) and stops. .

During this period, the tire 1 is intermittently rotated at a predetermined angle by the intermittent rotation mechanism 5, and then the cylinder 54 rotates the tire 1 intermittently at a predetermined angle.
1 (l) and repeat the above-mentioned siping cycle sequentially.

When the tire 1 rotates once, the intermittent rotation by the intermittent rotation mechanism 5 stops.

Then, the rim 3 is moved back by the cylinder 20, the tire 1 is removed from the wheels 1 and 2.3, and the next tire 1 is set in the same manner as described above.

In the above embodiment, there was one disc cutter 7, but
By setting two disc cutters through spacers corresponding to the siping interval, siping can be done at twice the speed. In this case, it goes without saying that the intermittent rotation should be made every other time.

Further, the disc cutter 7 cuts the tread surface 1a of the tire 1.
In other words, when the disc cutter 7 is moved from right to left as in the above embodiment, the siping is made by moving the disc cutter 7 from right to left as shown in FIG.
Furthermore, it is preferable to rotate the disc cutter 7 clockwise (clockwise) when moving the disc cutter 7 from left to right to apply siping, and further, by returning the cutter base 9 to the next intermittent rotation position. 11- It is also a mistake to apply siping to the area. In this case, the disc cutter 7 is reversed so that another water spray nozzle 48 (small white circle in FIG. 1) is provided on the other front side in the direction of rotation.

(Effects of the Invention) As is clear from the above description, the present invention provides a siping device that uses a sliding sled having a desired curvature and a cutter that partially protrudes from the sliding sled, thereby producing a new tire or a retreaded tire. Directly on the tire tread surface.
It is possible to apply siping with no irregularities in the siping depth, the siping depth can be easily adjusted, and furthermore, siping can be applied to different depths depending on the part of the tread.

Furthermore, in terms of structure, the cutter and sliding sled are driven by a motor or cylinder, which makes the operation simple and reliable, and the manufacturing cost is low.

[Brief explanation of the drawing]

Figure 1 is a plan view of the automatic siping device, Figure 2 is a side view of Figure 1, Figure 3 is a layout of the pulse counting type intermittent rotation mechanism, and Figure 4 is the control of the mechanism in Figure 3. FIG. 5 is a block diagram, FIG. 5 is a layout diagram of a change gear type intermittent rotation mechanism, FIG. 6 is a perspective view of a sliding sled and a disc cutter, and FIG. 7 is an explanatory diagram showing a siping procedure for a sliding sled and a disc cutter. A... Tire setting device, B... Siping device,
1... Tire, 1a... Tread surface, 2
．． 3... Rim, 4... Tire support mechanism, 5
...Intermittent rotation mechanism, 6...Motor, 7...Disc cutter, 8...Sliding sled, 9...Cutter stand, 10...Dolly, 11...Guide rail, 1
2... Angle change mechanism. Patent Applicant Sumitomo Rubber Industries Co., Ltd. Representative Patent Attorney Aoyama Aoyama and 2 others Figure 5 Figure 6 F

Claims (1)

[Claims] (1) A siping device that directly applies siping to the circumferential tread surface of a tire, the siping device having an arcuate shape having a predetermined curvature and capable of reciprocating in the siping direction and in the front-rear direction perpendicular to the siping direction. A siping device characterized in that a siping cutter is provided to protrude from the sled to match a desired maximum siping depth.