JPH09267410A - Bead molding machine and wire like material winding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bead molding machine facilitated in the adjustment of the diameter of a former, the alteration of the cross-sectional shape of a bead and the taking-out of the bead. SOLUTION: A base disc 103 is fixed to a rotary shaft 101. Four attaching segments 111 are provided on the base disc 103 so as to be freely movable in the radius direction of the disc and former substrates 120 are fixed to the respective attaching segments 111 and winding grooves 123 are formed to the peripheral surfaces of the former substrates 120. The clamp pin 126 holding the leading end of a wire 1 is provided within the winding groove 123 of one former substrate 120. When a bead is taken out, the former substrates 120 are forcibly moved toward the center of the shaft and the diameter of a former is contracted and, at this time, work stoppers 151 for supporting the bead 3 are provided to the gaps between the former substrates 120.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a bead forming machine for forming a bead (bead cord) used as a reinforcing material for a bead portion of an automobile tire, and a linear wire for winding or winding other linear members. The present invention relates to a body winding device.

[0002]

BACKGROUND ART A single-winding bead is a ring body obtained by winding a single rubber-coated wire over a plurality of layers while aligning the wires so as to have a predetermined cross-sectional shape.

As shown in FIG. 27, the single winding bead is generally called a hexagonal bead having a hexagonal cross section. Hexagonal beads 3A, wire 1 covered with rubber 2
Is placed between the wires in the lower layer, as shown by the arrow, so-called bale stacking is performed.

FIG. 28 (A) shows what is called a square bead having a rectangular cross section.

There are two types of square beads 3B, one in which they are stacked in a bag as shown in FIG. 28 (B), and one in which they are stacked right above, as shown in FIG. 28 (C). Direct stacking is to align the wires directly above the underlying wire 1.

FIG. 29 is an exploded perspective view showing a former of a conventional single-roll bead molding machine. 30 and 31 are cross-sectional views of the former. FIG. 30 shows a state in which the wire 1 is wound to form a bead, and FIG. 31 shows a state in which the formed bead is taken out. .

The former 200 has an annular winding groove 201 around which the wire 1 is wound. The former 200 is a headstock former 202 and a tailstock former 203.
And the inner former 204. The headstock former 202 is the former main spindle (rotating shaft) 205.
It is fixed to. The inner former 204 is slidably mounted on the headstock former 202 and on a shaft 207 that rotates therewith. Tailstock former
203 is supported by a shaft 206 which rotates in synchronization with the former main shaft 205. That is, the former 200 has two axes 205
It is supported in a cantilevered fashion by 206.

Particularly, as shown in FIG. 30, the peripheral surface 204a of the inner former 204 becomes the bottom surface of the winding groove 201.
On both sides of this bottom surface 204a, headstock former 202
And tail end former 203 annular end faces 202a, 203a
Is located to form the side surface of the winding groove 201. The winding groove 201 has a half of the sectional shape of the finished bead, for example, the lower half of the hexagon in the hexagonal bead.

The headstock former 202, tailstock former 203 and inner former 204 are all divided into two halves. Fine adjustment of the bead diameter is performed by adjusting the gap between the two halves.

The gap between the two halves of the inner former 204 can be reduced for removal of the finished bead. That is, the two halves of the inner former 204 are connected by the link 210. These halves are slidably attached to a shaft 209 fixed to a shaft 207.

At the time of winding the wire, that is, forming the bead, as shown in FIG.
The link 210 is pushed by the push rod 211 provided on the 3 and is provided on the headstock former 202.
The inner former 204 is pushed by the cylinder 208 via the shaft 207 in the direction opposite to the pushing direction of the push rod 211.

When the completed bead is taken out, as shown in FIG.
The tailstock former 203 separates from the inner former 204, as shown in FIG. Inner former 204
Moves in the direction of being housed in the headstock former 202 by the air cylinder 208, and the two halves of the inner former 204 approach each other. This reduces the diameter of the inner former 204. Therefore, the formed beads fall from between the headstock former 202 and the tailstock former 203.

The inner former 204 is provided with a clamp mechanism near its peripheral surface as shown in an enlarged view in FIGS. 32 to 34. This clamp mechanism is L-shaped lever
Equipped with 212. The lever 212 is pivotally attached at its midpoint so as to be swingable, and forms a part of the bottom surface of the winding groove 201.

As shown in FIG. 32, the tip of the wire 1 introduced into the winding groove 201 is pressed from above by a lever 212 provided on the inner former 204, and between the lever 212 and the receiving portion 215. Clamped to. Since the pushing mechanism 214 provided on the inner former 204 is pushed by the push rod 213 provided on the tail stock former 203, the lever 212 is held in a state where the tip of the wire is clamped via the pushing mechanism 214.

In this state, the entire former 200 rotates and the wire 1 is wound in the winding groove 201 in an aligned state.

When taking out the completed bead 3, the inner former 204 is contracted in the radial direction and moved in the direction of the headstock former 202, as described above. Further, the tailstock former 203 retreats in the opposite direction to the inner former 204. Since the pressing by the push rod 213 is released, the lever 212 is separated from the tip of the wire 1 and the tip of the wire 1 becomes free (see FIGS. 33 to 34). The bead 3 falls from between the headstock former 202 and the tailstock former 203.

However, such a conventional single-roll bead molding machine has the following problems.

(1) Headstock former 202, tailstock former 203 and inner former
Since each of the 204 is divided into two parts, and the change of the bead diameter is performed by adjusting the gap between the two halves of these formers 202, 203, 204, it may be formed depending on the size of the gap. The bead formed may be elliptical. Moreover, it is necessary to strictly match the sizes of these three types of formers 202, 203, and 204, which is troublesome.

(2) Since the cross-sectional shape of the bead to be molded is defined by the annular end surfaces 202a and 203a of the headstock former 202 and the tailstock former 203 in particular, when forming beads having different cross-sectional shapes, these formers are formed. Must be replaced.

(3) The headstock former 202 and the tailstock former 203 are mounted on separate shafts, and the completed beads are attached to these formers 202.
Since it has to be taken out from between No. 203 and 203, it is difficult to automate the take-out of beads.

(4) Since the completed bead is dropped and taken out, it is difficult to handle the falling bead, and the winding start and winding end terminals of the bead do not always come to the same position.

(5) Since the tip of the wire 1 is clamped at a location away from the position of the bead to be molded, the tip of the wire tends to be deformed and lifted up from the bead, which requires manual correction.

[0023]

DISCLOSURE OF THE INVENTION It is an object of the present invention to provide a bead molding machine capable of molding beads that are as close to a perfect circle as possible.

Another object of the present invention is to make it possible to easily adjust the bead diameter in a bead molding machine.

The present invention also makes it possible to easily change the cross section of the bead to be molded.

A further object of the present invention is to provide a bead molding machine which can easily take out a completed bead and can automate bead taking out.

Further, the present invention provides a structure capable of clamping the wire end without deformation.

Another object of the present invention is to keep the tension of the wire supplied to the former substantially constant.

An object of the present invention is to provide not only a wire for forming a bead, but also a device that can generally wind a wire.

In the bead molding machine according to the present invention, the base is fixed to the rotating shaft, and the former is constituted by at least three divided former forming bodies. The former forming bodies are movable in the radial direction on the base. Is installed in
In addition, a winding groove having a shape forming a part of the annular groove is formed on the peripheral surface thereof.

Since the former is constituted by the former forming body divided into at least three, preferably into four or more, the bead to be formed is closer to a perfect circle than the conventional two-divided former. Will be things. Since the former forming body is movable in the radial direction, the diameter of the bead to be formed can be changed. Since one rotating shaft is provided, it is possible to move the former forming body in a direction in which the former diameter is reduced and take out the completed bead from the opposite side of the rotating shaft.

Preferably, when the former forming body is detachably provided on the base and the bead diameter to be molded and the cross-sectional shape of the bead are changed, the former forming body may be replaced.

Further, the side wall of the winding groove is formed by a flange member which is detachable from the former forming body. The cross-sectional shape of the bead can also be changed by replacing the flange member.

In a preferred embodiment of the present invention, an equalizer mechanism for moving the plurality of former forming bodies at the same time in the radial direction at the same distance is provided.

The equalizer mechanism specifically includes, as an example, a cam plate rotatably provided on the base about the position of the rotary shaft. The same number of cam surfaces having the same shape as the former forming bodies are formed on the cam plate, and the cam followers attached to the former forming bodies are in contact with the cam surfaces.

Since a plurality of former forming bodies can be moved at the same distance by the equalizer mechanism at the same time, the bead diameter can be easily adjusted.

In a further preferred embodiment of the invention,
A former diameter reducing mechanism for forcibly moving the plurality of former formers at the same distance toward the center of the base is provided. This reduction mechanism is used when the completed bead is taken out from the winding groove.

In the case where the equalizer mechanism is provided, the reduction mechanism is configured such that the plurality of former forming bodies are located inside the position defined by the equalizer mechanism as the outermost position. At the same time, it is configured to be forcibly moved at the same distance.

More preferably, a holding member for holding the bead in the winding groove is provided in the gap between the former forming bodies when the former diameter is reduced by the reducing mechanism. As a result, the bead is temporarily held by the holding member and is separated from the former forming body having a reduced diameter.

Furthermore, if necessary, a notch for taking out a bead is formed in the peripheral portion of at least one, preferably two or more former forming bodies. The bead can be grasped and taken out by the robot hand through the notch.

In this way, the automation of taking out the completed beads can be realized.

More preferably, a mechanism for clamping the tip of the wire is provided on the at least one former forming body. The clamp mechanism is provided movably so as to traverse the wire tip receiving groove formed on the bottom surface of the winding groove of the former forming body, and the wire tip end portion between the wire groove and one side surface of the winding groove. And a clamp pin formed with a notch that sandwiches the pin.

Since the tip of the wire is fixed at a position very close to the start of winding the wire, the wire tip is not deformed after bead molding, and when the bead is taken out after the bead molding, the elasticity of the bead causes the wire tip to move. Return to the designated place.

Preferably, a magnet for temporarily fixing the wire tip is provided in the wire tip accommodating groove.

In another embodiment of the present invention, a feed roller for feeding the wire to the former and a tension detector for measuring the tension of the wire provided between the feed roller and the former are provided. By controlling the rotation of the feed roller based on the tension detection signal from the tension detector, the tension of the wire supplied to the former is always kept substantially constant.

In the linear body winding device according to the present invention, the base is fixed to the rotary shaft, and the base is provided with a forming body for winding the linear body. The forming body is provided in at least three divided portions. Each of the above-mentioned divided portions is provided on the base so as to be movable in the radial direction, and a portion for winding the linear body is formed on the outer surface thereof.

In this linear body winding device, a wound body of a linear body having an arbitrary shape and, if necessary, a shape close to a perfect circle can be obtained. In addition, the size can be changed, and the completed wound body can be easily taken out.

FIG. 26 shows a square bead having a structure proposed by the applicant (see Japanese Patent Application No. 6-335404). This is to make the position of the wire 1 in the odd-numbered layer of the bead 3 almost the same as the position of the wire 1 in the lowermost layer, and to arrange the wire 1 in the even-numbered layer slightly offset from the wire 1 in the odd-numbered layer (of the wire 1). The amount of deviation is about 0.1D to 0.3D, where D is the wire spacing of the odd layers. Since this bead 3 can make the distance between the wires 1 in the width direction narrower than that of the bales stacked (FIG. 28 (A)),
The bead 3 is tightly tightened, and the wire is not disturbed and the torsional rigidity is higher than that of the directly stacked one (the wire position is easily disturbed in the directly stacked one).

Using the bead molding machine described above, FIG.
Beads having an arrangement as shown in can be prepared.

In addition to winding a wire covered with rubber to form a bead, the bead forming machine described above can
It can also be used for winding or winding other linear bodies (linear body winding device). In this case, the shape of the former substrate, the shape of the winding groove, and the like are determined according to the thickness and type of the wound linear body, the diameter of the annular body obtained by winding, the cross-sectional shape, and the like.

[0051]

EXAMPLE FIG. 1 is a front view of the whole one-roll bead molding machine,
FIG. 2 is a side view.

The wire 1 covered with the rubber 2 is first introduced into the guide / roll mechanism 20. Guide / roll mechanism 20
Is composed of a lever 21, a plurality of pairs of rolls 22 and pulleys 24 mounted on the lever 21. The lever 21 is swingably supported by a shaft 23 of an arm 25 fixed to the frame 10 of the bead molding machine. The wire 1 is guided by a pair of rolls 22, further hung on a pulley 24, and guided to a next feed / roll mechanism 40. Since the lever 21 falls down when the wire 1 is broken during bead molding, it is possible to detect the breakage of the wire 1 early by this. A detector for detecting that the lever 21 has fallen may be provided, and the operation of the bead molding machine may be stopped based on this detection signal.

The wire 1 introduced from the guide / roll mechanism 20 is introduced into the feed / roll mechanism 40 via the comb roll 30. The comb roll 30 is configured so that the wire 1 introduced from the guide roll mechanism 20 to the feed roll mechanism 40 does not come into contact with the wire 1 sent from the feed roll mechanism 40 to the tension pickup 60 described later. This is a roll for positioning the wire 1 in the width direction. The feed roll mechanism 40 is composed of two upper and lower rolls 41 and 42 which are rotatably supported on the frame 10. One of the rolls 41 is provided inside the frame 10 and is a rotation controllable AC servo motor ( It is rotationally driven by (not shown).

The wire 1 goes from the position of the comb roll 30 to the lower roll 42 through the upper roll 41, turns around the lower roll 42, is hung on the upper roll 41 again, and goes to the tension pickup 60.

A pressing roll 43 that comes into contact with the upper roll 41 is provided as needed. The pressing roll 43 is arranged at a position where the wire 1 is sent out from the upper roll 41 to the next tension pickup 60, and functions to press the wire 1 wound around the upper roll 41 to be in close contact with the upper roll 41. The press roll 43 has a built-in clutch mechanism that allows the press roll 43 to rotate only in one direction, thereby preventing the wire 1 from returning.

Further, a squeezing mechanism 50 is provided at a position where the wire 1 faces the lower roll 42 to the upper roll 41, if necessary. The curling mechanism 50 is rotatably supported by the tip of the rod of the cylinder 53 at the position between the two rolls 51 rotatably provided at a distance in the feeding direction of the wire 1 and between these rolls 51. And a roll 52. By sandwiching the wire 1 from both sides with rolls 51 and 52, and pressing the roll 52 against the wire 1 by a cylinder 53, the wire 1 is given a line curl suitable for the shape of the former described later. Roll 51 and cylinder
53 is attached to the frame 10 by a suitable attachment member.

The tension pickup 60 is loaded
A roll 61 that is rotatably provided in a part of the cell 63 and presses the wire 1 from one direction; a pair of rotatable rolls 62 that supports the wire 1 on both sides of the roll 61;
The load cell 63 detects the force applied to the wire 61 (tension of the wire 1). Roll 62 and load cell 63
Are attached to the frame 10 via suitable attachment members.

The tension detection signal from the load cell 63 is
It is fed back to the AC servo motor that drives the feed roll 41. The rotation speed of the feed roll 40 is controlled by the AC servo motor, and the tension of the wire 1 is adjusted so as to always have an optimum value.

The wire 1 is supplied to the former mechanism 100 from the position of the tension pickup 60, the weight roll mechanism 70 and the pain pulley mechanism 80.

The weight roll 70 has a shaft 73 on the frame 10.
Lever 72 that is swingably supported by this lever 72
And a weighting roll 71 rotatably attached to the tip of the. A receiving roll 74 that receives the weighting roll 71 is rotatably provided on the frame 10 at a position where the lever 72 maintains a substantially horizontal state. The wire 1 passes between the receiving roll 74 and the weighting roll 71. Weight / roll mechanism
70 is for holding the tip of the wire between the weight roll 71 and the receiving roll 74 when the wire 1 is cut by the wire cutting mechanism 90 after one bead has been formed by the former mechanism 100. It is a thing.

The painting / pulley mechanism 80 includes an elevating body 84 supported so as to be movable up and down, and a forming mechanism 100 is attached to the elevating body 84.
The movable body 83 is supported so as to be movable in the axial direction (traverse direction) of the rotating shaft. The elevating body 84 is moved up and down by an elevating mechanism 86 supported by a column 87 standing upright on the frame 10. The movable body 83 is moved in the traverse direction by a stepping motor (including a speed reducer) provided on the elevating body 84.

A pain pulley 81 having a groove for guiding the wire 1 and a wire guide tube (trumpet tube) 82 are fixed to the movable body 83. Wire
The guide cylinder 82 is for preventing the wire 1 from derailing from the groove formed in the pain pulley 81.
When the paing pulley 81 and the wire guide cylinder 82 traverse with the movable body 83, the wire is slightly displaced in the bead width direction along with the rotation of the former, whereby the wire 1 is aligned in the winding groove of the former. And then wound.

The wire cutting mechanism 90 includes a cutter 91 for cutting the wire 1 after one bead is formed, and a wire terminal pressing member for pressing the end of the cut wire 1 on the bead. 92 and.

More detailed configurations and operations of the weight / roll mechanism 70, the painting / pulley mechanism 80, and the wire cutting mechanism 90 will be described later.

FIG. 3 is an enlarged front view of the former mechanism 100, and FIG. 4 is a sectional view taken along line IV-IV of FIG. Former mechanism
100 is a wire for winding the wire 1 supplied through the pain pulley mechanism 80 to form a bead and take out the formed single-roll bead.

A hole 11 is formed in a side surface of a frame 10 of the one-roll bead molding machine, and a locate ring 12 for holding the former mechanism 100 is fixed. A hollow former main shaft 101 is rotatably supported by a locate ring 12 via a ball bearing 14. Former spindle 101
Is driven by an AC servo motor (not shown) capable of controlling rotation provided inside the frame 10 of the single-roll bead molding machine. The rotation of the former main shaft 101 causes the entire former mechanism 100 to rotate, and the wire 1 is wound in the winding groove 123. An air introduction hole 155 is also formed in the former main shaft 101 in the axial direction thereof. A hose 154 is connected to the outer end of the air introduction hole 155 to connect the air of the clamp mechanism described later.
It extends to the cylinder 130. The air introduction hole 155 is connected to a pump (not shown) in the frame 10 via a mechanical seal (not shown). Compressed air is supplied to the air cylinder 130 from this pump through the air introduction hole 155 and the hose 154.

The former mechanism 100 has a former, and this former is composed of four divided former substrates 120. As shown in FIG. 5, the former substrate 12
0 is, roughly speaking, a fan-shaped one formed by dividing a disk into four equal parts. Strictly speaking, the sides of the former substrate 120 are partially cut off and the central portion is also cut off so that gaps of equal width can exist between the former substrates 120.
The four former substrates 120 as a whole have an annular shape with gaps at equal angular intervals.

One of the four former substrates 120 (the one on the upper side in FIG. 5) has a wire end clamp mechanism 12
5 are provided. Details of the clamp mechanism 125 will be described later.

Further, another two former substrates 120 facing each other are provided with a rectangular notch 124 for removing the completed bead at the center of the outer peripheral edge thereof. After forming the bead, the former diameter is reduced, and a gripping position (robot, hand, etc .; not shown) is inserted into the notch 124,
The completed bead is taken out from the front of the former mechanism 100.

The former substrate 120 has the same ring shape of 4
Bolts 121 on mounting segments 111 with split shape
Fixed by each. Details of mounting segment 111 are shown in FIG. These four mounting segments 111 are synchronously movable in the radial direction, as will be described later.

The outer peripheral surface of the former substrate 120 is shown in FIG.
A winding groove 123 is formed as shown in FIG. This winding groove 123
Is a flange 120a formed on one side of the outer peripheral edge of the former substrate 120 and a bolt 12 on the other side of the outer peripheral edge of the former substrate 120.
And a flange member 122 fixed by 2a.

The winding groove 123 defines the cross-sectional shape of the bead to be molded. The wires are aligned in the winding groove 123 and wound in multiple layers. The winding groove 123 shown in FIG. 7 (A) is for a square bead (having a quadrangular cross section).

When molding a hexagonal bead having a hexagonal cross section, as shown in FIG. 7B, the former substrate 120A having the winding groove 123 of a shape suitable for hexagonal bead molding is formed on the former substrate 120. Instead, it may be mounted on the mounting segment 111. This former substrate 120A has a hexagonal bead winding groove 12
Having a flange 120b for 3 and a flange member 122b
Is installed.

The former substrate 120 is attached to the mounting segment 111.
Being detachable is useful not only when forming beads having different cross-sectional shapes and widths as described above, but also when forming beads having different diameters. That is, a former substrate having a size suitable for a desired bead diameter may be prepared and attached to the attachment segment 111.

The diameter of the bead to be molded can be changed by moving the former substrate in the radial direction. Since the former is divided into four former substrates, excellent roundness can always be maintained even if the bead diameter changes. The numbers of the former substrate 120 and the mounting segments 111 are not limited to four (four divisions). The roundness of the bead produced improves as the number of former substrates increases.

In the single winding bead having a so-called bale stack structure, the pressure applied to the inner surface of the winding groove by the wire wound in the former winding groove 123 becomes large. Preferably, the bottom surface and the inner surface of the former winding groove 123 are plated with self-lubricating chrome (special plating in which hard chrome plating is coated with Teflon). As a result, the surface hardness of the winding groove 123 is increased, the wire is less likely to be worn when wound, and an appropriate surface roughness is obtained, so that the bead release property formed is improved.

A wire winding start end clamp mechanism 125 provided on the upper former substrate 120 is shown in FIGS. 8 to 11. FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 5, showing a state where the tip of the wire 1 is introduced into the clamp mechanism 125. FIG. 11 shows a state in which the tip of the wire 1 is fixed.
Is shown in 9 and 10 are plan views,
It is a side view.

The flange 120a is provided on the upper portion of the former substrate 120.
Further, the reinforcing blocks 127a and 127b are fixed so as to hold a part of the flange member 122. These flanges 120
a, flange member 122, and reinforcing blocks 127a and 127b
A sliding hole 128 is formed so as to pass through in the thickness direction. A cylindrical clamp pin 126 is slidably inserted into the sliding hole 128.

A winding groove is provided on the upper surface of the clamp pin 126.
A notch 129 is formed at a position located inside 123. The bottom surface of the notch is slightly lower than the bottom surface of the former winding groove 123. The end surface of the notch 129 on the side of the flange member 122 forms an acute angle with the bottom surface so as to easily hold the end of the wire. Notch 129 on crank pin 126
The upper portion of the peripheral surface where the groove is not formed is located at substantially the same height as the groove of the winding groove 123 in the winding groove 123.

On the bottom surface of the former winding groove 123, a housing groove 141 for housing the tip of the wire 1 is tangentially formed.
It is formed across the position where the crank pin 126 is provided. The storage groove 141 is deeper on the left side in FIG. 10 (that is, as it goes in the direction opposite to the winding direction of the wire). The width of the storage groove 141 is considerably larger than the diameter of the wire 1 so that the tip of the wire 1 can be easily introduced. Further, in order to prevent the wire from rising, a small magnet 142 is embedded under the bottom of the left end (deep portion) of the storage groove 141. The magnet 142 temporarily fixes the tip of the wire 1.

An air cylinder 130 is provided on the front surface of the former substrate 120 below the reinforcing block 127a. The rod 131 of the air cylinder 130 is the former substrate 12
It passes through a hole 133 formed in 0 so as to swing freely and projects to the back surface of the former substrate 120.

A bracket 136 is provided on the reinforcing block 127b. A link 137 is swingably attached to the bracket 136 at its central portion by a shaft 138. A long hole 139 is formed at the upper end of the link 137, and a long hole 140 is formed at the lower end thereof. Crank pin 12
6 and a pin 134 fixed to the end of rod 131 and
135 fits loosely in these slots 139 and 140, respectively.

From the painting / pulley mechanism 80 to the former mechanism
The tip of the wire 1 introduced into the 100 is the former winding groove 12
3 storage groove 141 and crank pin 126 notch 129
It is guided inside and fixed by the magnet 142. Thereafter, when the air cylinder 130 is driven and the rod 131 thereof is retracted, the crank pin 126 is moved to the left in FIG. 8 via the link 137. Therefore, the tip of the wire 1 is connected to the end face of the notch 129 of the crank pin 126 and the flange 120a
It is firmly sandwiched between and and is firmly fixed (see Fig. 11).

The tip of the wire 1 is wound from the position in the former groove 123 where it comes into contact with the flange 120a (this is the winding origin).

By rotating the former, the rubber-coated wire 1 is wound around the former in a plurality of layers in an aligned state. After this, the air cylinder 130 is driven again and the rod 131 advances, so that the crank pin 126
The pinching of the tip of the wire 1 due to is released. The elasticity of the wire 1 causes the tip of the wire 1 to return to the winding origin.

Referring back to FIGS. 3 and 4, a step portion 102 having a slightly larger diameter is formed at the tip of the former main shaft 101, and the base disk 103 is fixed to this step portion 102. A front view of this base disk 103 is shown in FIG. On the front surface of the base disk 103, an annular groove 105 is concentrically formed at a position approximately midway between the central hole 104 and the outer peripheral edge. The bottom of the annular groove 105 has four arc-shaped slots 108.
Are formed at equal angular intervals along the groove 105.

Further, on the front surface of the base disk 103, a wide shallow groove 110 orthogonal to each other is formed. An elongated hole 112 extending in the radial direction is formed in the groove 110. A part of the elongated hole 112 is hooked on the annular groove 105.

A former diameter adjusting cam 106 is rotatably fitted in the annular groove 105 of the base disk 103. This former diameter adjusting cam 106 is shown in FIG.
The former diameter adjusting cam 106 has an annular shape, and four cam curves of the same shape are formed on its inner peripheral edge at equal angular intervals.

14 and 15 show a state in which the former diameter adjusting cam 106 is fitted in the annular groove 105 of the base disk 103. FIG. 14 shows a cam 10 for adjusting the former diameter.
6 shows a state where the diameter of the former is increased, and FIG. 15 shows a state where the diameter of the former is reduced by the cam 106 for adjusting the diameter of the former.

Behind the base disk 103 (close to the frame 10)
At the worm wheel 107, the former spindle 101
Is rotatably held in a large diameter part. This worm wheel 107 is shown in FIG. Worm 115 meshes with worm wheel 107.
The worm 115 is rotatably supported by a bearing 116 mounted on the back surface of the base disk 103. Four connecting pins 109 are concentrically fixed to the front surface of the worm wheel 107 at equal angular intervals. The connecting pins 109 are fixed to the former diameter adjusting cam 106 described above through the arc-shaped elongated holes 108 formed in the base disk 103, respectively. When the worm 115 is rotated by its shaft 115a using a tool or the like, the worm wheel 107 is rotated, and the former diameter adjusting cam 106 is rotated within the range of the arc-shaped elongated hole 108 of the base disk 103 accordingly.

The above-mentioned mounting segment 111 (see also FIG. 6) has a cam follower (specifically, a pin) 11 at the center thereof.
3 is fixed. This cam follower 113 extends in the direction of the base disk 103, and the former diameter adjusting cam 106
Is in contact with the cam surface 114 from inside. Further, the tip end of the cam follower 113 is inserted in the long hole 112 of the base disk 103. Since the long hole 112 is long in the radial direction (see FIG. 12),
The cam follower 113 moves only in the radial direction.

When the former diameter adjusting cam 106 is rotated through the worm wheel 107 by rotating the worm 115 as described above (see FIGS. 14 and 15), the cam follower is restricted by the cam surface 114. Since 113 moves in the radial direction of base disk 103, mounting segment 11
1 will move in the radial direction. As a result, the former substrate 120 fixed to the mounting segment 111 moves in the radial direction. This is the fine adjustment of the former diameter.

A slide unit 117 is provided for moving the mounting segment 111 in the radial direction to the circular end. Details of the slide unit 117 are shown in FIG. The slide unit 117 has two supporting members fixed in the shallow groove 110 in parallel with the base disk 103.
118 and two rollers 119 rotatably supported by the support member 118. Roller 119 contacts the back of mounting segment 111. A total of four slide units 117 are provided. A cam follower 11 is provided between the two support members 118 of each slide unit 117.
3 is located. A so-called LM guide can be used as the slide unit 117.

As best shown in FIG. 4, the spline shaft 143 is axially movable within the hollow former main shaft 101 by the ball spline 144 and rotates in conjunction with the former main shaft 101. It is provided in. The spline shaft 143 is axially reciprocally driven by a drive device (not shown) provided in the frame 10.

A bracket fixing member 145 is fixed to the tip of the spline shaft 143. This bracket fixing member
Four brackets 146 are attached to the side surface of 145 at equal angular intervals. Correspondingly, brackets 147 are provided on the front surfaces of the four mounting segments 111 (see also FIG. 6). The bracket 146 and the bracket 147 are connected by a link 149.

The bracket 14 is also attached to the tip of the former main shaft 101.
8 fixed at equal angular intervals. These brackets
The link 148 and the midpoint of the link member 149 are respectively linked 150
Are connected by The length between the links 150 is half the length between the connecting points at both ends of the link member 149. Link 149 and link 150 form the so-called Scott-Russell mechanism.

When the spline shaft 143 is reciprocated in the axial direction, the mounting segment 111 moves in the radial direction via the Scott-Russell mechanism, and the former substrate 120 fixed to the segment 111 also moves in the radial direction. This expands and reduces the diameter of the former. When the wire is wound around the former to form the bead, the spline shaft 143 enters the most and the former diameter becomes the largest (worm 115
Adjusted position using). Spline shaft
If the 143 is advanced and the former diameter is reduced, the molded beads can be taken out.

18 and 19 show the work stopper 15
1 is an enlarged view of 1. This work stopper 15
1 is for separating the bead from the former and temporarily holding the bead when the former diameter is reduced. FIG. 18 shows the condition when the former diameter is large (bead molding), and FIG. 19 shows the condition when the former diameter is reduced. Corresponding to FIGS. 3 and 4, an overall view of the former mechanism 100 when the former diameter is reduced is shown in FIGS. 20 and 21, respectively.

The work stopper 151 is the former substrate 120.
Four pieces are provided corresponding to the gaps between them. The work stopper 151 is composed of a mounting member 152 fixed to the outer peripheral surface of the base disk 103, and a holding member 153 mounted to the mounting member 152 so that its position can be adjusted. 4 holding members 153
It is located in the gap between the two former substrates 120. The holding member 153 is formed thin so as not to get in the way when the former diameter is reduced (that is, when the gap in the former substrate 120 is reduced).

The holding member 153 has two elongated holes 154. Through this slot 154, bolt 155
It is fixed at 152. Retaining member 15 by loosening bolt 155
3 can be moved and the bolt 155 can be tightened to fix the holding member 153 at a desired position.

As described above, when the former diameter is adjusted using the worm 115, the holding surface of the holding member 153 is aligned with the bottom surface of the former winding groove 123 of the former substrate 120 according to the adjusted former diameter. The fixing position of the holding member 153 is adjusted.

After the bead molding, when the spline shaft 143 is advanced and the former diameter is reduced, the beads 3 are
It is temporarily held by the holding member 153 of the stopper 151. The coating rubber 2 of the wire 1 forming the bead 3 is stuck to the winding groove 123, but the bead 3 is separated from the winding groove 123 by the former diameter being reduced and the bead 3 being held by the work stopper 151. . After this, as described above, the holding member is moved by the gripping device that enters the notch 124.
The bead held at 152 is removed from the former.

Finally, the wire cutting mechanism 90 and the painting / pulley mechanism 80 will be briefly described.

22 to 25 are conceptual diagrams showing the operation from the start of winding the wire around the former to the cutting of the wire after the winding is completed.

In FIG. 22, when the wire 1 is wound around the former, the movable body 83 of the pain pulley mechanism 80 traverses (reciprocates in the width direction of the winding groove 123), and the wire The wire 1 supplied by the guide cylinder 82 and the painting / pulley mechanism 81 is wound while being aligned in the winding groove 123.

When the winding around the former is completed, the lifting mechanism 86 lifts the lifting body 84 as shown in FIG.
The wire 1 is lifted by the wire guide tube 82,
It enters into the cutter 91 of the wire cutting mechanism 90. The weight roll 70 is lifted by the rising wire 1.

When the wire 1 is cut by the cutter 91, the weight roll 70 is lowered by its own weight as shown in FIG. 24, and the tip of the wire 1 on the supply side is a weight roll mechanism.
Back with 70 and receiving roll 71. Further, the terminal pressing member 92 descends and the bead-side tip of the cut wire 1 is pressed against the outer peripheral surface of the bead 3.

When the molded bead 3 is removed from the former, the elevating body 84 descends again as shown in FIG. The tip of the wire 1 on the supply side advances toward the former side. The tip of the wire 1 is the storage groove 141 of the winding groove 123 of the former.
Introduced to the magnet 142 and clamp pin 126
Then, the wire 1 is re-started.

[Brief description of drawings]

FIG. 1 is an overall front view of a single-roll bead molding machine.

FIG. 2 is a side view of the entire single-roll bead molding machine.

FIG. 3 is an enlarged front view of the former mechanism.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a front view showing a former substrate.

FIG. 6 is a front view showing a mounting segment.

FIG. 7A is a shape of a square bead former, and FIG.
FIG. 4 is a cross-sectional view showing the shape of a hexagon bead former.

8 is a sectional view taken along line VIII-VIII of FIG. 5, showing a state in which the tip of the wire is introduced into the clamp mechanism.

FIG. 9 is a plan view of a clamp mechanism.

FIG. 10 is a side view of the clamp mechanism.

FIG. 11 shows a state in which the tip of the wire is fixed by a clamp mechanism.

FIG. 12 is a front view showing a base disk.

FIG. 13 is a front view showing a former diameter adjusting cam.

FIG. 14 is a front view showing a state in which the former diameter adjusting cam is fitted in the annular groove of the base disk.

FIG. 15 is a front view showing a state in which the former diameter adjusting cam is fitted in the annular groove of the base disk.

FIG. 16 is a front view showing a worm wheel.

FIG. 17 shows a state where a slide unit is fixed on a base disk.

FIG. 18 is an enlarged perspective view showing a work stopper.

FIG. 19 is an enlarged perspective view showing a work stopper.

20 is an overall view of the former mechanism when the former diameter is reduced, and corresponds to FIG.

21 is a sectional view taken along line XXI-XXI of FIG.
Corresponding to

FIG. 22 is a conceptual diagram showing an operation from winding to cutting of a wire.

FIG. 23 is a conceptual diagram showing an operation from winding to cutting of a wire.

FIG. 24 is a conceptual diagram showing an operation from winding to cutting of a wire.

FIG. 25 is a conceptual diagram showing an operation from winding to cutting of a wire.

FIG. 26 is a cross-sectional view showing a square bead.

27A is a perspective view showing a hexagonal bead, and FIG. 27B is a sectional view thereof.

FIG. 28 (A) is a perspective view showing a square bead, and (B) and (C) are cross-sectional views thereof.

FIG. 29 is an exploded perspective view showing a former of a conventional single-roll bead molding machine.

FIG. 30 is a cross-sectional view of the former, showing a state in which the wire is wound to form the bead.

FIG. 31 is a cross-sectional view of the former, showing a state where the molded bead is taken out.

FIG. 32 is an enlarged sectional view showing a clamp mechanism.

FIG. 33 is an enlarged cross-sectional view showing a clamp mechanism.

FIG. 34 is an enlarged sectional view showing a clamp mechanism.

[Explanation of symbols]

 1 wire 3 bead 40 feed roll mechanism 50 squeeze mechanism 60 tension pickup 100 former mechanism 103 base disk 106 former diameter adjusting cam 109 connecting pin 111 mounting segment 113 cam follower 114 cam surface 120 former board 123 former groove 151 work piece Stopper

Claims (13)

[Claims] 1. A former is formed by a former forming body having a base fixed to a rotating shaft and divided into at least three parts. Each former forming body is provided on the base so as to be movable in a radial direction, and A bead molding machine in which a winding groove having a shape that forms a part of an annular groove is formed on the peripheral surface. 2. The bead molding machine according to claim 1, wherein the former forming body is detachably provided on the base. 3. The bead molding machine according to claim 1, further comprising an equalizer mechanism that moves the plurality of former forming bodies at the same time in the radial direction by the same distance. 4. The equalizer mechanism includes a cam plate rotatably provided on the base about the position of the rotary shaft, and the cam plate has the same number of equal shapes as the number of the former forming bodies. The bead molding machine according to claim 3, wherein a cam surface is formed, and a cam follower attached to the former forming body is in contact with the cam surface. 5. A flange member forming a side wall of the winding groove is detachably attached to the former forming body,
The bead molding machine according to claim 1. 6. The bead molding according to claim 1, further comprising a former diameter reducing mechanism for forcibly moving the plurality of former forming bodies at the same distance toward the center of the base at the same time. Machine. 7. A former diameter for forcibly moving the plurality of former forming bodies inward from this position, with the position regulated by the equalizer mechanism being the outermost position, at the same time, at the same time. A reduction mechanism is provided,
The bead molding machine according to claim 3 or 4. 8. The holding member for holding a bead in the winding groove when the former diameter is reduced by the reduction mechanism is provided in a gap between the former forming bodies. The bead molding machine described. 9. A mechanism for clamping a tip of a wire is provided on the at least one former forming body, and the clamping mechanism includes a wire tip accommodating groove formed on a bottom surface of a winding groove of the former forming body, The bead molding machine according to claim 1, further comprising a clamp pin that is movably provided so as to cross the storage groove and that has a notch for sandwiching a wire tip portion with one side surface of the winding groove. . 10. The bead molding machine according to claim 9, wherein a magnet for fixing the tip of the wire is embedded in the groove for accommodating the tip of the wire. 11. The bead forming machine according to claim 1, wherein a notch for taking out a bead is formed in a peripheral portion of the at least one former forming body. 12. A feed roller for feeding the wire to the former, and a tension detector provided between the feed roller and the former for measuring the tension of the wire,
The bead molding machine according to claim 1, wherein the rotation of the feed roller is controlled based on a tension detection signal from the tension detector. 13. A base is fixed to a rotating shaft, and a forming body for winding a linear body is provided on the base, and the forming body is divided into at least three divided portions. A linear body winding device in which a portion is provided on the base so as to be movable in a radial direction, and a portion for winding the linear body is formed on an outer surface thereof.