JP3827374B2 - Bead ring forming equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bead ring molding apparatus capable of molding different types of bead rings.
[0002]
[Prior art]
As a conventional bead ring molding apparatus, for example, one described in Japanese Patent Publication No. 1-30573 is known. This consists of a headstock former, an inner former and an outer former attached to the headstock outer shaft, the headstock inner shaft and the tailstock shaft, respectively, and the bottom of the square groove for winding the bead ring strand is formed on the inner former. The bead ring forming apparatus is formed by the outer peripheral surface of the face ring and the both groove walls of the square groove by the edge of the face ring of the headstock former and the edge of the face ring of the outer former, respectively. The head stock former is formed by a disk fixed to the head stock outer shaft, and a face ring removably attached to the vicinity of the outer periphery of the disk via a spacer. Slides in opposite directions along the diameter of the inner shaft A semi-circular disk attached to the outer periphery and a semi-circular face ring removably attached to the outer peripheral surface thereof, and a disk having the outer former fixed to the tailstock shaft and an outer periphery of the disk. Each is formed by a face ring detachably attached in the vicinity.
[0003]
[Problems to be solved by the invention]
However, in such a bead ring molding apparatus, when switching the type of bead ring to be molded (inch size, cross-sectional shape), the head stock former, outer former and inner former face rings are removed by loosening bolts. Then, the face ring of the type corresponding to the bead ring to be formed thereafter was selected, and then the face ring had to be attached to the headstock former, outer former and inner former again by bolts. For this reason, the work becomes troublesome, and the operation of the molding apparatus has to be stopped for a long time during such replacement work, resulting in a problem that work efficiency is lowered.
[0004]
It is an object of the present invention to provide a bead ring forming apparatus that can easily and efficiently switch the type of bead ring.
[0005]
[Means for Solving the Problems]
The purpose of this is to maintain a coaxial relationship between a plurality of molded rings that have a ring shape as a whole and are divided into a plurality of parts in the circumferential direction, each having a different type of annular groove for forming a bead ring on the outer periphery. a molding ring assembly constructed by connecting, by moving in a radial direction in synchronism with a plurality of segments that are divided piece of the forming ring, and a scaling means for scaling the forming ring assembly, or When a bead element is supplied to the annular groove of the forming ring and is wound spirally a plurality of times to form a predetermined type of bead ring, and the type of bead ring to be formed is changed from the predetermined type of bead ring it can be achieved by be relocated the destination of the bead element in an annular groove of the type of forming rings in the molding ring assembly
[0006]
When the bead element is supplied to the annular groove of one of the forming rings and wound in a spiral shape a plurality of times, a predetermined type of bead ring is formed on the forming ring. Next, when the segments are moved radially inward by the expansion / contraction means, the molded ring assembly is reduced in diameter, so that the molded bead ring can be easily taken out from the annular groove of the molded ring. Here, if there is a change in the type (inch size, cross-sectional shape) of the bead ring to be molded, it is possible to respond by simply changing the supply destination of the bead element, that is, the molding ring to that type. As a result, the attaching and detaching operations as in the prior art are not required, and the operation of the molding apparatus is not stopped during these operations, so that the type of bead ring can be switched easily and efficiently.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
In FIGS. 1, 2, and 3, reference numeral 11 denotes a bead ring forming apparatus for forming a bead ring B for a pneumatic tire by spirally winding a bead element, for example, a steel wire W. This forming apparatus 11 is not shown. It has a horizontal spindle 12 that is driven and rotated by no motor. A slide base 13 is fixed to the outer periphery of the main shaft 12. The slide base 13 includes a disk-shaped disk portion 13a extending in the radial direction, and one axial end (tip) from the radially inner end of the disk portion 13a. It is comprised from the cylindrical part 13b extended toward. A plurality of, in this case, six pairs of guide rails 14 extending in the radial direction are laid on one side surface of the disk portion 13a of the slide base 13, and these guide rails 14 are arranged equidistantly in the circumferential direction. Yes. Reference numeral 15 denotes a plurality of fan-shaped, here six, sliders, which are arranged equidistantly in the circumferential direction. Slide sliders 16 that are slidably engaged with the guide rails 14 are respectively attached to the sliders 15. As a result, the sliders 15 are radially attached to the slide base 13 via the guide rails 14 and the slide bearings 16. It is supported so as to be movable.
[0008]
19 and 20 are formed rings having a ring shape as a whole, and the formed ring 19 is for forming a bead ring B having a square section with an inch size of 17 inches, for example, while the formed ring 20 is an inch size. A bead ring B having a square cross section of 16 inches is formed and has a smaller diameter than the forming ring 19. Circular grooves 21 and 22 extending in the circumferential direction are formed on the outer circumferences of the forming rings 19 and 20, respectively, and the steel wires W are supplied to the annular grooves 21 and 22 and wound, so that different types are provided. Here, bead rings B having different inch sizes are formed. Each of the forming rings 19 and 20 is divided into a plurality of pieces in the circumferential direction, here divided into six pieces, and a plurality of (six) pieces of arc-shaped segments 23 and 24 that are divided pieces are arranged on the outside of the slider 15 in the radial direction. It is arranged on one side of the end portion so as to overlap in the axial direction in this order. The segments 23 and 24 are fastened together by a plurality of bolts 25 and nuts 26 and are detachably attached to the slider 15. For this reason, the molding rings 19 and 20 are connected to each other while maintaining a coaxial relationship, and the two molding rings 19 and 20 connected together constitute a molding ring assembly 27 as a whole.
[0009]
A substantially cylindrical cylinder block 31 is slidably fitted on the outer side of the main shaft 12 on one axial side of the slide base 13, and the cylinder block 31 can move in the axial direction of the main shaft 12. A plurality of, here six, brackets 32 which are equidistant from each other in the circumferential direction are fixed to the outer periphery of the cylinder block 31, while the same number of brackets 33 as the brackets 32 are fixed to one side of each slider 15. Has been. Reference numeral 34 denotes a plurality of pairs for connecting the cylinder block 31 and the slider 15, here, six pairs of links which are the same number as the brackets 32, 33, and the radially outer end of each pair of links 34 is bracketed via a pin 35. The inner end in the radial direction is connected to the bracket 32 via a pin 36 so as to be rotatable. Reference numeral 38 denotes a circumferential groove-shaped cylinder chamber formed on the inner periphery of the cylinder block 31, and a piston 39 fixed to the outer periphery of the main shaft 12 is slidably accommodated in the cylinder chamber 38. The piston 39 divides the cylinder chamber 38 into a one-side chamber 38a and another-side chamber 38b. The one-side chamber 38a has a one-side passage 40 formed in the cylinder block 31, and the other-side chamber 38b has a cylinder. The other side passage 41 formed in the block 31 communicates. When pressure fluid is supplied from a fluid source (not shown) through the one side passage 40 or the other side passage 41 to the one side chamber 38a or the other side chamber 38b, the cylinder block 31 is axially moved along the axis of the main shaft 12. Moving. Here, when the cylinder block 31 moves to one side, the link 34 swings so as to fall down, so the slider 15 and the segments 23 and 24 move inward in the radial direction synchronously, while the cylinder block 31 When moved to the other side, the link 34 swings so as to rise, so the slider 15 and the segments 23 and 24 move radially outward in synchronization. The cylinder block 31 can move to the other side until it contacts the cylindrical portion 13b of the slide base 13. However, when the cylinder block 31 reaches the corresponding contact position (the other side limit), the slider 15 moves radially outward. That is, the diameter expansion of the forming rings 19 and 20 is stopped, and the bead ring B is formed. On the other hand, the cylinder block 31 can move to one side until it comes into contact with the piston 39, but when it reaches the corresponding contact position (one side limit), the slider 15 moves radially inward, that is, the molding ring 19 , 20 is stopped, and the molded bead ring B is taken out. When it is desired to slightly change the inner diameter of the bead ring B, that is, when it is desired to slightly change the position of the outer limit in the radial direction of the slider 15, the segments 23 and 24, the cylinder block 31 and the cylindrical portion 13b This can be dealt with by arranging a spacer between them and changing the thickness of the spacer. Further, instead of the spacer as described above, a stopper that defines the position of the other side limit of the cylinder block 31 may be provided so that the position of the stopper can be adjusted. The aforementioned guide rail 14, slider 15, cylinder block 31, link 34, and piston 39 as a whole expand / contract means for expanding / contracting the forming ring assembly 27 by moving the plurality of segments 23, 24 in the radial direction synchronously. Configure 42.
[0010]
Next, the operation of the first embodiment of the present invention will be described.
When forming a bead ring B having a predetermined type, for example, a square cross section having an inch size of 17 inches, the supply position of the steel wire W is shifted in the axial direction until it matches the forming ring 19, and the other side passage from the fluid source. Pressure fluid is supplied to the other chamber 38b of the cylinder chamber 38 through 41, and the cylinder block 31 is moved to the other side in the axial direction until it abuts against the cylindrical portion 13b. At this time, since the movement of the cylinder block 31 is transmitted to the slider 15 via the link 34, the slider 15, the segments 23 and 24 move synchronously to the outer limit in the radial direction, and the forming rings 19 and 20 form the bead ring B. The diameter is expanded to the molding position for performing. Next, when the steel wire W is supplied to the annular groove 21 of the forming ring 19 while the main shaft 12 and the forming ring assembly 27 are integrally rotated by the motor, the steel wire W spirals in the annular groove 21 a plurality of times. The bead ring B of a predetermined type is formed on the forming ring 19 by being closely wound.
[0011]
Next, the molded bead ring B is taken out. In this case, the pressure fluid is supplied to the one side chamber 38a of the cylinder chamber 38 through the one side passage 40, and until the cylinder block 31 comes into contact with the piston 39, the axial direction is constant. Move to the side. As a result, the link 34 swings so as to fall, and the slider 15 and the segments 23 and 24 move synchronously inward in the radial direction, and the forming rings 19 and 20 are reduced in diameter. Thereafter, the bead ring B is taken out from the annular groove 21 of the forming ring 19. At this time, since the outer diameter of the forming ring 19 is smaller than the inner diameter of the bead ring B, the bead ring B can be easily taken out from the forming ring 19. Can do.
[0012]
Next, in the case of changing the type of bead ring B to be formed, for example, the inch size from 17 inches to 16 inches, the supply position of the steel wire W is shifted in the axial direction until it matches the forming ring 20, and then the above-mentioned. The bead ring B is formed in the same manner as described above. When the type of the bead ring B is changed in this way, the supply destination of the steel wire W, that is, the forming ring, can be dealt with by simply changing the forming ring, here the forming ring 19 to 20, As a result, attachment and removal operations as in the prior art are not required, and the operation of the molding apparatus is not stopped during these operations, and the type of the bead ring B can be easily and efficiently switched. In addition, when it is necessary to mold a different type from the currently installed molding rings 19 and 20, for example, a 15-inch bead ring B, the molding ring located at one end, in this case, the molding ring 20 is removed, What is necessary is just to replace | exchange for the said type (15 inches) shaping | molding ring.
[0013]
FIG. 4 shows a second embodiment of the present invention. In this embodiment, the molded ring assembly 46 is composed of three molded rings 47, 48, 49 for molding, for example, 17, 16, and 15 inch bead rings B, respectively, and each molded ring 47, 48, The cross-sectional shape of the annular grooves 50, 51, 52 formed on the outer periphery of 49 is a trapezoid obtained by dividing a regular hexagon into two. If a bead element made of a single filament made of steel is supplied to the desired annular grooves 50, 51, 52 and wound in a spiral shape a plurality of times, a bead ring B having a regular hexagonal cross section with a different inch diameter is formed. It is.
[0014]
FIG. 5 is a diagram showing a third embodiment of the present invention. In this embodiment, the molded ring assembly 55 is composed of three molded rings 56, 57, 58 for molding, for example, 17, 16, and 15 inch bead rings B, respectively, and these molded rings 56, 57, The circular grooves 59, 60, 61 formed on the outer periphery of the 58 have a rectangular cross section, a trapezoid obtained by dividing a regular hexagon into two, and a slightly wide inclined trapezoid. If a bead element made of a single filament made of steel is supplied to the annular groove 59 and wound in a spiral shape a plurality of times, a bead ring B having a square cross section with an inch size of 17 inches is formed in the annular groove 60. If a bead element similar to the above is wound, a flat bead ring B having an inch size of 16 inches and a cross section of a regular hexagon is formed. If a bead element similar to the above is wound around the annular groove 61, an inch size is obtained. The taper bead rings B having a hexagonal shape with a cross section of 15 inches are formed, and thus the bead rings B having different inch sizes and different cross-sectional shapes can be easily formed.
[0015]
【The invention's effect】
As described above, according to the present invention, the type of bead ring can be switched easily and efficiently.
[Brief description of the drawings]
FIG. 1 is a front cross-sectional view showing a first embodiment of the present invention, in which an upper half is in an expanded state and a lower half is in a reduced diameter state.
FIG. 2 is a right side view of FIG.
FIG. 3 is a front sectional view of the vicinity of a forming ring assembly.
FIG. 4 is a front sectional view similar to FIG. 3, showing a second embodiment of the present invention.
FIG. 5 is a front sectional view similar to FIG. 3, showing a third embodiment of the present invention.
[Explanation of symbols]
11 ... Bead ring forming device 19, 20 ... Forming ring
21, 22 ... annular groove 23, 24 ... segment
27 ... Molding ring assembly 42 ... Expansion / contraction means B ... Bead ring W ... Bead element

Claims (3)

A plurality of molded rings that are ring-shaped as a whole and divided into a plurality of parts in the circumferential direction and formed with different types of annular grooves for forming bead rings on the outer circumference are connected by maintaining a coaxial relationship with each other. An annular groove of any one of the molding rings, comprising: a molding ring assembly; and expansion / contraction means for expanding / contracting the molding ring assembly by synchronously moving a plurality of segments that are divided pieces of the molding ring in the radial direction. When a bead ring is supplied and is wound spirally a plurality of times to form a predetermined type of bead ring, and the type of bead ring to be formed is changed from the predetermined type of bead ring, the bead element is supplied to The bead ring forming apparatus is characterized in that is changed to an annular groove of the type of forming ring in the forming ring assembly . 2. The bead ring forming apparatus according to claim 1, wherein the forming ring assembly is configured by removably connecting a plurality of forming rings. The bead ring forming apparatus according to claim 2, wherein the expansion / contraction means has a plurality of sliders to which a forming ring assembly is detachably attached and which can move in the radial direction.

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