JP2002243437A - Method and apparatus for measuring ruggedness of inner periphery of vulcanization executing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure a ruggedness of an inner periphery of a vulcanization mold 31 without stopping a vulcanizing work of a tire vulcanizing apparatus. SOLUTION: A method for measuring the ruggedness of the inner periphery of a vulcanization executing unit comprises the steps of clamping a container 36 and the vulcanization mold 37 similarly to a tire vulcanizing time by a separate clamping means 53 from the tire vulcanizing apparatus, and then measuring the ruggedness of the inner periphery of the mold 37. Thus, conveying and delivering works of a measurement sensor 65 into or from the mold 37, a ruggedness measuring work and regulating works of the container 36 and the mold 37 based on its measured result can be executed by separate setting-up from the vulcanizing work. As a result, it is not necessary to stop the vulcanizing work of the tire vulcanizing apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for measuring unevenness of a vulcanizing section of a tire vulcanizing apparatus, such as a container and a vulcanizing mold.

[0002]

2. Description of the Related Art Conventionally, a method for measuring the inner peripheral unevenness of a vulcanizing section.
As an apparatus, for example, an apparatus described in Japanese Patent Application Laid-Open No. 7-329073 is known. This is the vulcanization unit used in the tire vulcanizer used for production,
Here, after assembling the container and the vulcanization mold, the tire vulcanizing apparatus is closed and the same tightening force as in vulcanization is applied to the vulcanizing section, and in this state, the inner periphery of the vulcanization mold is measured by the unevenness measuring means. Is measured.

[0003]

However, in such a conventional method and apparatus for measuring the inner peripheral unevenness of a vulcanizing section, vulcanization is performed using a tire vulcanizing apparatus used in actual production. Since the unevenness of the inner periphery of the performing unit is measured, the period during which the measurement sensor used for measuring the unevenness is carried in and out of the vulcanizing unit, the period during which the unevenness of the inner periphery of the vulcanizing unit is measured by the unevenness measuring unit, And, during the period of adjustment of the vulcanization performing section based on this measurement result, the vulcanization work by the tire vulcanizer must be stopped,
There is a problem that the operation rate of the tire vulcanizing apparatus is reduced and the productivity is reduced.

SUMMARY OF THE INVENTION The present invention provides a method and apparatus for measuring unevenness in the inner periphery of a vulcanizing unit, which can measure the unevenness of the inner periphery of the vulcanizing unit without stopping the vulcanizing operation of the tire vulcanizing apparatus. With the goal.

[0005]

SUMMARY OF THE INVENTION The purpose of the invention is as follows.
Applying a pinching force in the axial direction to a vulcanizing section separated from the tire vulcanizing apparatus at a position away from the tire vulcanizing apparatus, and tightening the same in substantially the same manner as in vulcanizing; By measuring the inner surface irregularities of the vulcanizing section, comprising the step of measuring the irregularities of the inner periphery of the vulcanizing section,

[0006] Second, an axial clamping force is applied to a vulcanizing section installed at a position distant from the tire vulcanizing apparatus and separated from the tire vulcanizing apparatus, so that the vulcanizing time can be reduced. This can be achieved by an apparatus for measuring the inner periphery unevenness of a vulcanization section, which includes a tightening means for tightening almost equally and an irregularity measuring means for measuring the irregularity of the inner periphery of the vulcanization section.

First, the vulcanizing section separated from the tire vulcanizing apparatus is carried into a fastening means provided at a position remote from the tire vulcanizing apparatus. Thereafter, an axial clamping force is applied to the vulcanizing section by the tightening means, and these are tightened almost in the same manner as at the time of vulcanization. Then, the unevenness of the inner periphery of the vulcanizing section is measured by the unevenness measuring means.

[0008] Since the vulcanization section is fastened by a fastening means different from the tire vulcanizing apparatus, the work of loading / unloading the measurement sensor for measuring the unevenness, the work of measuring the unevenness by the measurement sensor, and the like. The adjustment work of the vulcanization unit based on the measurement results can be performed in an external setup different from the vulcanization work, and as a result, there is no need to stop the vulcanization work of the tire vulcanizing device, and the operation rate and production The performance is improved. Here, the vulcanizing section corresponds to only a container or a container and a vulcanization mold assembled to the container.

Here, during normal tire vulcanization, the vulcanizing section is pushed out by the high-pressure vulcanizing medium supplied into the bladder, so that the pinching force applied to the vulcanizing section from the tire vulcanizing apparatus. Is used to both prevent the spread by the vulcanizing medium and to apply a tightening force to the vulcanizing section. When the measurement is performed by the external setup as described above, the vulcanizing section is used. Will not be spread by.

For this reason, as described in claim 5, the clamping force applied from the fastening means to the vulcanizing section is smaller than the clamping force applied from the tire vulcanizing device to the vulcanizing section during vulcanization, If it is not more than 0.6 times, the vulcanization section may be damaged. However, if it is less than 0.3 times, the tightening force on the vulcanizing section becomes too weak,
In some cases, it may not be possible to perform proper unevenness measurement.

Further, according to the structure described in claim 6, it is possible to reliably apply a predetermined tightening force with a simple structure. Further, according to the structure described in claim 7, it is possible to easily measure the unevenness of the inner surface of the vulcanization section at an arbitrary axial position.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 11 denotes a frame installed at a position distant from a tire vulcanizing device (not shown). The frame 11 has a horizontal disk-shaped fixed table 12 at the upper end. On the upper surface of the fixed table 12, a plurality of, here three, radiation grooves 13 extending in the radial direction are provided.
Are formed equidistantly in the circumferential direction. Guide rails 14 extending along the radiation grooves 13 are laid on the bottom surface of each radiation groove 13, and the lower ends of the guide rails 14 are fixed to the movable bodies 15 inserted into the radiation grooves 13, respectively. A slide bearing 16 is slidably engaged.

As a result, the plurality (three) of the movable bodies 15
Are supported by the frame 11 via guide rails 14 so as to be movable in the radial direction. Locking portions 19 are formed at the upper end of each movable body 15 to extend radially inward, and the lower surfaces of these locking portions 19 are in contact with a vulcanizing section of a tire vulcanizing device described later.

The frame 11 has a cylindrical support cylinder 20 fixed to the center of the fixed table 12, and the center axis of the support cylinder 20 extends vertically. Reference numeral 21 denotes a bracket fixed to the lower surface of the fixed table 12, and the bracket 21 supports a fluid cylinder 22 so that the fluid cylinder 22 can swing in a horizontal plane.

Reference numeral 23 denotes a transmission ring rotatably fitted to the outer periphery of the lower end portion of the support cylinder 20 located below the fixed table 12.
Of the piston rod 24 is connected via a bracket 25. As a result, when the fluid cylinder 22 operates and the piston rod 24 projects or retracts, the transmission ring 23 rotates forward or backward about the center axis of the support cylinder 20.

Reference numeral 27 denotes the same number of horizontal connecting links as the movable body 15, and these connecting links 27 are arranged at equal angular intervals in the circumferential direction similarly to the movable body 15. The inner radiating ends of these connecting links 27 are rotatably connected to the transmission ring 23 via pins 28, while the lower outer ends of the vertically extending pins 29 are fixed to the outer radiating ends of these connecting links 27. ing. Here, the central portions of the pins 29 are inserted into radially extending slits (not shown) formed in the fixed table 12 and the guide rails 14, and the upper ends thereof are turned to the lower ends of the corresponding movable bodies 15. It is movably inserted.

As a result, when the transmission ring 23 rotates in the forward or reverse direction as described above, the movable body 15 is pushed by the connecting link 27 which is inclined to approach the radial direction, and moves outward or radially. It is pulled by the connecting link 27 which is inclined away from the inner side, and moves synchronously to the inside of the radiation. The above-described fluid cylinder 22, transmission ring 23, and connection link 27 as a whole constitute a moving mechanism 30 that synchronously moves the movable body 15 in the radial direction.

Reference numeral 33 denotes a horizontal disk-shaped mounting table. The mounting table 33 is installed at a position surrounded by the movable body 15 from the radiation outside. Numeral 35 is a vulcanizing unit which is placed on the mounting table 33 after being separated from the tire vulcanizing apparatus,
The vulcanizing section 35 includes a container 36 and a vulcanization mold 37 assembled to the container 36.

Here, the container 36 has a substantially ring-shaped outer ring 40 attached to the lower surface of an upper platen that can be moved up and down of the tire vulcanizing device. The inner ring of the outer ring 40 expands downward. A conical inclined surface 41 is formed. 42 is a horizontal disk-shaped upper plate surrounded from the outside by the outer ring 40,
The piston rod of the cylinder of the tire vulcanizing device is connected to the upper plate.

An upper side mold 43 is fixed to the lower surface of the upper plate 42. The upper side mold 43 mainly molds a sidewall portion of an unvulcanized tire at the time of vulcanization. 44
Are a plurality of arc-shaped sector segments which are set apart in the circumferential direction, and these sector segments 44 are supported so as to be movable in the radial direction while hanging from the upper side mold 43 to the upper plate 42 radiating outside. . And
An inclined surface 45 having the same inclination as the inclined surface 41 of the outer ring 40 is formed on the outer periphery of each of the sector segments 44, and the inclined surfaces 41 and the inclined surfaces 45 are slidably engaged with each other by being connected by a joint. I agree.

Reference numeral 47 denotes arc-shaped sector molds fixed to the radial inner surfaces of the sector segments 44, respectively. These sector molds 47 mainly mold a tread of an unvulcanized tire at the time of vulcanization. Then, when the sector segments 44 are synchronously moved to the radial inner limit by the wedge action of the inclined surfaces 41 and 45 due to the lowering of the outer ring 40, these sector molds 47 are in close contact with each other and have a continuous ring shape. Reference numeral 48 denotes a lower side mold attached to a lower platen of the tire vulcanizing device.The lower side mold 48 is placed on the mounting table 33 and mainly covers the sidewall portion of the unvulcanized tire during vulcanization. Type.

The above-mentioned outer ring 40 and upper plate 4
2.Sector segment 44 as a whole is the container 3
6, the container 36 may include a lower plate attached to the lower platen of the tire vulcanizer. The upper side mold 43, the sector mold 47, and the lower side mold 48 constitute the vulcanization mold 37 as a whole, and the upper side mold 43, the sector mold 47, and the lower side mold 48 are formed as a sector as described above. When the mold 47 moves to the radial inner limit, they come into close contact with each other.

Numeral 50 denotes a fluid cylinder as a vertical movement means. The fluid cylinder 50 extends in the vertical direction.
It is inserted and fixed in the support cylinder 20. The distal end of the piston rod 51 of the fluid cylinder 50 is connected to the mounting table 33, and as a result, the fluid cylinder 50
When the piston rod 51 protrudes or retracts due to the operation, the mounting table 33 on which the vulcanizing section 35 is mounted moves up and down. Reference numeral 52 denotes a plurality of vertically extending guide rods fixed to the lower surface of the mounting table 33.
52 is slidably inserted into the fixed table 12.

After the vulcanizing section 35 is mounted on the mounting table 33, the moving mechanism 30 operates to move the movable body 15 synchronously to the radial inner limit, and thereafter the fluid cylinder 50 operates. When the mounting table 33 and the vulcanizing section 35 rise, the outer ring
The upper end of 40 comes into pressure contact with the locking portion 19 of the movable body 15. At this time,
The vulcanizing section 35 separated from the tire vulcanizing device has an axial clamping force (fluid cylinder 50) from the mounting table 33 and the locking portion 19 of the movable body 15 at a position away from the tire vulcanizing device.
Of the vulcanization, the vulcanization section 35 (container 36, vulcanization mold 37) is tightened in the radial direction almost in the same manner as during vulcanization.

The above-described frame 11, guide rail 14, movable body 15, moving mechanism 30, mounting table 33, fluid cylinder 50, and guide rod 52 are installed as a whole at a position away from the tire vulcanizing apparatus. By applying a pinching force in the axial direction to the vulcanizing section 35 separated from the vulcanizing apparatus, a tightening means 53 is configured to tighten the vulcanizing section 35 almost the same as in vulcanizing.
If the fastening means 53 is configured as described above, it is possible to reliably apply a predetermined fastening force with a simple structure.

Here, during normal tire vulcanization, the vulcanizing section 35 is pushed outward by the high-pressure vulcanizing medium supplied into the bladder. The applied pinching force is used to both prevent the spread by the vulcanizing medium and to apply a tightening force to the vulcanizing section 35. When measuring the unevenness of the circumference,
The vulcanizing section 35 is not spread by the vulcanizing medium.

For this reason, the vulcanizing section is moved from the fastening means 53
The pinching force applied to 35 must be smaller than the pinching force applied to the vulcanizing section 35 from the tire vulcanizing device during vulcanization. Specifically, it is preferable to set the holding force to not more than 0.6 times the holding force applied from the tire vulcanizing apparatus. The reason for this is that if it exceeds 0.6 times, when the vulcanizing section 35 is clamped by the fastening means 53, an excessive force may act on a part of the vulcanizing section 35 to cause breakage.

However, if the above value is less than 0.3 times, the tightening force on the vulcanizing section 35 becomes too weak, and it may not be possible to perform an appropriate measurement of unevenness. The pinching force applied to the portion 35 is preferably 0.3 times or more the pinching force applied from the tire vulcanizing apparatus to the vulcanizing section 35 during vulcanization.

2 and 3, reference numeral 55 denotes a motor mounted on the elevating body 54. The output shaft 56 of the motor 55 is coaxial with the vulcanizing section 35 and has a horizontal disk at the tip (lower end) thereof. The rotating plate 57 is fixed. An upper end of a spline shaft 58 that is coaxial with the output shaft 56 and extends in the up-down direction is attached to the lower surface of the rotating plate 57.
Are spline-connected. A pair of motors 60 are fixed to the lower surface of the rotary plate 57, and output shafts 61 of these motors 60 are provided.
Is a screw shaft in which a screw portion 62a is screwed into the elevating table 59.
62 are connected.

As a result, the motor 55 operates and the output shaft
When the 56 rotates, the rotating plate 57, the spline shaft 58, the elevator 5
9. The motor 60 and the screw shaft 62 integrally rotate around the vertical axis. On the other hand, when the motor 60 operates and the output shaft 61 rotates, the elevator 59 moves up and down along the spline shaft 58. A measurement sensor 65 composed of, for example, a non-contact laser type sensor or the like is fixed to the outer periphery of the lift table 59.
Detects the distance from the measurement sensor 65 to the vulcanization mold 37 facing the measurement sensor 65, specifically, the inner circumference of the sector mold 47 while rotating together with the elevator 59, and outputs the detection result to the control unit 66. .

Here, as described above, when the detection result is input from the measurement sensor 65 to the control unit 66, the control unit 66 performs an operation based on the detection result to obtain the unevenness on the inner periphery of the vulcanization mold 37. Ask for. The above-described spline shaft 58, lift 59, motor 6
0, the screw shaft 62 constitutes a lifting mechanism 67 for raising and lowering the measurement sensor 65 as a whole. And thus, the measurement sensor 65
The vulcanizing unit 35 (sector mold 4) at any axial position can be raised and lowered by the lifting mechanism 67.
7) Measurement of unevenness on the inner surface can be easily performed. Also,
The elevating body 54, the motor 55, the rotating plate 57, and the measuring sensor 6 described above.
5, the control unit 66 and the lifting mechanism 67 as a whole
The unevenness measuring means 68 for measuring the unevenness of the inner periphery of the (vulcanizing mold 37) is configured.

Next, the operation of the embodiment of the present invention will be described. When measuring the irregularities of the inner circumference of the vulcanization performing section 35 by external setup prior to mounting on the tire vulcanizing apparatus, first, it is separated from the tire vulcanizing apparatus and stored in a storage place. Vulcanizing section 35 (here, container 36 and vulcanization mold 37 assembled to container 36)
By means of a loader (not shown)
The sheet is conveyed to 53, and is loaded and mounted on the mounting table 33 waiting at the lower limit. At this time, since the movable body 15 has been moved to the radiation outer limit by the moving mechanism 30, it does not hinder the conveyance of the vulcanizing section 35.

Next, the fluid cylinder 22 of the moving mechanism 30 is operated to retract the piston rod 24 and rotate the transmission ring 23 in the reverse direction. As a result, the connecting link 27 gradually inclines greatly with respect to the radiation direction, so that the movable body 15 is pulled by the connecting link 27 and synchronously moves to the inside of the radiation.
The movement of the movable body 15 is performed when the locking portion 19 has moved to just above the outer ring 40 of the vulcanizing section 35.
Stop.

Next, when the fluid cylinder 50 is actuated to cause the piston rod 51 to protrude, the mounting table 33 and the vulcanizing section 35 rise integrally, but these rises occur when the upper end of the outer ring 40 rises. When it is pressed against and pressed against the engaging portion 19 of the movable body 15 by the fluid force of the fluid cylinder 50, it stops. At this time, the vulcanizing section 35 applies an axial clamping force (fluid force of the fluid cylinder 50) from the mounting table 33 and the locking portion 19 of the movable body 15.
The vulcanization unit 35 (container 36,
The vulcanization mold 37) is tightened in the radial direction almost at the same time as during vulcanization.

Next, the elevating body 54, the motor 55, the elevating table 59, and the measuring sensor 65 are lowered integrally, and these are vulcanized to the vulcanizing section 35.
(Vulcanization mold 37). Then, the lowering of the motor 55, the lifting platform 59, and the measurement sensor 65 stops when the measurement sensor 65 reaches the same height as the measurement start point on the inner circumference of the sector mold 47.

Next, while the motor 55 is operated to rotate the rotary plate 57 and the measuring sensor 65 integrally about the axis of the vulcanizing mold 37, the vulcanizing section 35 is rotated by the measuring sensor 65.
The distance to the inner periphery of the (sector mold 47) is detected, and the detection result is output to the control unit 66 one after another. At this time, the control unit 66 performs an operation based on the detection result, and the vulcanization mold 37
The unevenness of the inner circumference of (sector mold 47) is obtained.

At the time of measuring such irregularities, the motor 60 is operated to rotate the output shaft 61 and the screw shaft 62, and
Since the measurement sensor 65 moves up or down, the vulcanization section
The unevenness of the inner circumference of 35 (sector mold 47) is measured spirally. As a result, the vulcanization section 35 (sector mold 4
7) The irregularities on the inner circumference are measured continuously and at high speed over a wide range. The above-described lifting and lowering of the elevating platform 59 and the measurement sensor 65 and the measurement of unevenness on the inner periphery of the vulcanization performing unit 35 (sector mold 47) are intermittently repeated, whereby the vulcanization performing unit 35 (sector mold 47) The unevenness of the inner circumference may be measured.

Thereafter, the vulcanizing section 35 (sector mold)
47) Based on the results of the inner peripheral unevenness, the fastening state between the components constituting the container 36 and the vulcanizing mold 37 is adjusted, and the inner peripheral unevenness of the vulcanizing section 35 (sector mold 47) is reduced. Here, since such irregularities have a high correlation with the RFV value of the product tire vulcanized using the vulcanizing section 35, it is effective in reducing the RFV of the product tire.

As described above, in this embodiment, since the vulcanization section 35 is tightened by the fastening means 53 different from the tire vulcanizing apparatus, the measurement sensor 65 is carried into the vulcanization section 35. Out work, unevenness measurement work, and adjustment work of the vulcanization execution unit 35 based on the measurement results can be performed in an external setup different from the vulcanization work, and as a result, the vulcanization work of the tire vulcanizing device is stopped. It is no longer necessary to increase the operating rate and productivity.

Next, the vulcanizing unit 35 adjusted as described above is mounted on a tire vulcanizing apparatus to perform vulcanization of an unvulcanized tire. At this time, the vulcanizing unit 35 (sector mold) 47) The final unevenness of the inner circumference and the unevenness of the outer circumference of the unvulcanized tire to be vulcanized are determined, for example, by comparing the peak of the inner circumference of the vulcanizing section 35 (sector mold 47) with the uncured peak. The uniformity of the product tire can also be improved by matching the convex peak on the outer periphery of the sulfur tire.

In the above-described embodiment, the vulcanizing section 35 is constituted by the container 36 and the vulcanization mold 37 assembled to the container 36. However, in the present invention, the vulcanizing section is constituted only by the container. Is also good. In this case,
The irregularities based on the failure of the container itself can be measured, thereby facilitating the adjustment work, and can be used as element analysis data of the defective portion.

In the above-described embodiment, the locking portion
19 was brought into contact only with the outer ring 40,
In the present invention, the upper plate may be brought into contact with the upper plate. Further, in the above-described embodiment, the mounting table 33 and the vulcanizing section 35 are raised by the fluid cylinder 50, and the holding force is applied to the vulcanizing section 35. The vulcanization section may be raised by a vertically extending screw shaft, and the clamping force may be applied to the vulcanization section by a fluid cylinder.

[0043]

As described above, according to the present invention, without stopping the vulcanizing operation of the tire vulcanizing apparatus,
Irregularities on the inner periphery of the vulcanizing section can be measured.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken on line II of FIG. 1;

FIG. 3 is a front view near a measurement sensor.

[Explanation of symbols]

 11 ... frame 15 ... movable body 19 ... locking part 30 ... moving mechanism 33 ... mounting table 35 ... vulcanization performing part 36 ... container 37 ... vulcanization mold 50 ... vertical movement mechanism 65 ... measuring sensor 67 ... elevating mechanism 68 ... unevenness Measuring means

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshio Nohara 3-1-1, Ogawa-Higashi-cho, Kodaira-shi, Tokyo Bridgestone Technology Center F-term (reference) 2F069 AA60 BB28 CC03 GG04 GG07 GG12 GG14 GG51 JJ10 MM02 MM23 MM34 PP02 4F203 AH20 DA11 DB01 DC01 DK01 DK09 DK13

Claims (7)

[Claims] 1. A step of applying an axial clamping force to a vulcanizing section separated from a tire vulcanizer at a position away from the tire vulcanizer, and tightening the same in substantially the same manner as during vulcanization; Measuring unevenness of the inner periphery of the vulcanizing section by an unevenness measuring means. 2. The vulcanizing section is a container.
The method for measuring the inner circumferential unevenness of a vulcanizing section according to the above description. 3. The vulcanizing section comprises a container and a vulcanizing mold assembled to the container, and the irregularities on the inner periphery of the vulcanizing mold are measured by irregularity measuring means. The method for measuring the inner peripheral unevenness of the vulcanizing section. 4. A vulcanizing section separated from the tire vulcanizing apparatus is provided at a position distant from the tire vulcanizing apparatus, and applies a pinching force in an axial direction to the vulcanizing section, thereby making the vulcanizing section substantially equivalent to the vulcanizing state An unevenness measuring apparatus for an inner periphery of a vulcanizing section, comprising: a tightening means for tightening the inner surface of the vulcanizing section; 5. The pinching force applied to the vulcanizing section by the fastening means is in the range of 0.3 to 0.6 times the pinching force applied from the tire vulcanizing device to the vulcanizing section during vulcanization. 4
The inner peripheral unevenness measuring device of the vulcanizing section described in the above. 6. The fastening means comprises: a frame; a plurality of movable bodies which are supported by the frame so as to be movable in a radial direction, and which have an engaging portion at an upper end portion which extends inwardly of the radiation; A moving mechanism for moving in the radial direction, a mounting table installed at a position surrounded by the movable body, on which the vulcanizing section is mounted, and a vertical movement mechanism for vertically moving the mounting table. After the movable body is moved to the inside of the radiation synchronously by the moving mechanism, the vulcanizing section is moved up and down by the vertical movement mechanism, and the vulcanizing section is raised by the mounting section and the locking section of the movable body by raising the mounting table. Claim 4 wherein the
Or the inner peripheral unevenness measuring device of the vulcanizing section according to 5. 7. The measurement of the inner peripheral unevenness of the vulcanizing section according to claim 4, wherein the measuring sensor of the unevenness measuring means is movable up and down, and an elevating mechanism for raising and lowering the measuring sensor is provided. apparatus.