JP5974324B2 - Metal strip part forming apparatus and method - Google Patents

Description

  The present invention relates to an apparatus and a method for forming a metal band component that can automatically bend a metal band member.

A metal band component formed by bending a metal band member into a predetermined shape and cutting it into a predetermined length is used as, for example, a bead clip that holds a bundle of bead wires of an automobile tire and holds the bead shape.
Conventionally, bead clips as metal band parts formed from such metal band members have often been bent and cut using a hand tool or using an appropriate jig, Improvements were required in terms of molding work efficiency and molding accuracy.

In general, when forming a metal strip member, for example, as shown in Patent Document 1 below, bending is performed by forcibly passing between a plurality of rotating rollers, or as shown in Patent Document 2 below. In this manner, a swinging abutting member is pressed against a metal plate constrained by a pressing member on a processing bed, and bending is performed.
However, in the formation of metal band parts such as bead clips, for example, there are four or more bent parts in the same direction in the band length direction, and there are also bent parts in the reverse direction in order to fix the goby for fixing the winding. In addition, since it is also required to cut with a predetermined full length, it is difficult to cope with the conventional techniques as disclosed in Patent Documents 1 and 2.

JP 2002-086216 A (FIGS. 1 to 4) JP 2004-330282 A (FIGS. 1 to 3 and FIG. 5)

  An object of the present invention is to provide a metal band component forming apparatus and a forming method capable of performing a plurality of times of bending processing on a metal band member with high accuracy and enabling automatic processing in view of the above-described conventional technology. .

In order to solve the above-mentioned problem, the invention described in claim 1
A rotating die having an outer peripheral shape that follows the inner surface shape of a metal band component formed by bending a metal band member;
The metal strip member is sandwiched between the outer periphery of the rotating die, and a wound body wound around the rotating die by the rotation of the rotating die,
A pressing mechanism that presses the wound body in a position where the wound body sandwiches the metal band member between the rotating die and the urged presser roll toward the rotating die. This is a feature of a metal strip part forming apparatus.

  According to a second aspect of the present invention, in the metal strip component forming apparatus according to the first aspect of the present invention, a tip of the wound body is connected to an outer periphery of the rotary die so as to be undulated.

  According to a third aspect of the present invention, in the metal strip component forming apparatus according to the second aspect, the tip of the metal strip member is fed to a joint portion at the tip of the wound body, and the metal strip member has a predetermined length. The present invention is characterized in that a conveyance cutting device for cutting is provided.

  According to a fourth aspect of the present invention, there is provided the metal strip component forming apparatus according to any one of the first to third aspects, wherein the wound body is wound around the outer periphery of the rotary die. The inner circumferential side shape of the rotating die follows the outer circumferential side shape of the rotating die.

According to a fifth aspect of the present invention, in the metal strip component forming apparatus according to any one of the first to fourth aspects, the wound body is wound around an outer periphery of a rotary die with the metal strip member interposed therebetween. The chain is provided with a plurality of links having inner peripheries that form an inner peripheral shape that follows the outer peripheral shape of the rotating die.

According to a sixth aspect of the present invention, there is provided a wound body wound on an outer periphery of a rotary die having an outer peripheral shape that follows the inner surface shape of a metal band component formed by bending a metal band member; The presser roll in which the metal band member is sandwiched therebetween and the wound body is biased by the pressing mechanism at the position where the wound body sandwiches the metal band member between the rotary die is directed toward the rotary die. The metal band member is formed by following the outer peripheral shape of the rotating die by pressing and rotating the rotating die.

A seventh aspect of the present invention is the metal strip component forming method according to the sixth aspect of the present invention, wherein the wound body has an end that is undulated on the outer periphery of the rotary die. And

The invention according to claim 8 is the method of forming a metal strip part according to claim 7 , wherein the tip of the metal strip member is fed to the joint at the tip of the wound body, and the metal strip member Cut by length.

The invention according to claim 9 is the method for forming a metal strip part according to any one of claims 6 to 8 , wherein the inner periphery side shape of the wound body is wound around the outer periphery of the rotary die. However, it is characterized by using the one that follows the outer peripheral side shape of the rotary die.

According to a tenth aspect of the present invention, in the metal strip component forming method according to any one of the sixth to ninth aspects, the wound body is wound around an outer periphery of a rotary die with the metal strip member interposed therebetween. A chain having a plurality of links having an inner periphery forming an inner peripheral shape that follows the outer peripheral shape of the same rotating die.

According to the metal band component forming apparatus of the first aspect of the present invention, the winding body is wound around the rotating die by the rotation of the rotating die, so that the metal band member is pressed onto the outer periphery of the rotating die by the winding body. Since the metal band member is continuously formed into a metal band part having an inner surface shape that follows the outer peripheral shape of the rotary die, the working time and labor can be reduced. Automatic processing becomes possible.
By the pressing mechanism, the wound body is wound tightly around the rotating die with the metal band member sandwiched between them without loosening, so that a metal band part that is bent more accurately can be obtained.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the wound body is wound around the rotating die after the tip of the metal band member is sandwiched from the connecting portion of the tip to the rotating die. As a result, the metal strip parts are accurately formed without variation.

  According to the invention of claim 3, in addition to the effect of the invention of claim 2, the metal band member is cut and supplied to a predetermined length by the conveying and cutting device, so that the metal band parts are more uniform and accurate. Well formed.

  According to the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, the inner peripheral side shape of the wound body when the wound body is wound around the outer periphery of the rotary die Since the outer peripheral side shape of the rotary die is formed, the metal band member sandwiched between the rotary die and the wound body is bent and formed more accurately.

According to the invention of claim 5 , in addition to the effect of the invention of any one of claims 1 to 4 , since the wound body is constituted by a chain, the dimensions of each surface of the rotating die formed by bending are included. The inner periphery of each link is formed following the outer peripheral shape, and the link can be bent in accordance with the bending of each surface, so that a metal strip part that more accurately follows the outer peripheral shape of the rotating die is formed. The

According to the invention of the method for forming a metal strip part of claim 6 , since the wound body is wound around the rotating die, the metal band member is pressed onto the outer periphery of the rotating die by the wound body, The metal band member can be continuously formed into a metal band part having an inner surface shape that follows the outer peripheral shape of the rotary die, thereby reducing work time and labor and enabling automatic processing of the metal band part.
By the pressing mechanism, the wound body can be tightly wound around the rotating die with the metal band member interposed therebetween without loosening, and a metal band part that is more accurately bent can be obtained.

According to the invention of claim 7 , in addition to the effect of the invention of claim 6 , the winding body is wound around the rotating die after the tip of the metal band member is sandwiched from the connecting portion to the rotating die at the tip. In this way, the metal band part is formed, and therefore the metal band part can be accurately formed without variation.

According to the invention of claim 8 , in addition to the effect of the invention of claim 7 , the metal band member can be cut and supplied to a predetermined length by the conveying and cutting device, so that the metal band part can be formed more accurately without variation. it can.

According to the invention of claim 9 , in addition to the effects of the invention of any one of claims 6 to 8 , the inner peripheral side shape of the wound body when the wound body is wound around the outer periphery of the rotary die is Since the outer peripheral side shape of the rotary die is formed, the metal band member sandwiched between the rotary die and the wound body can be bent and formed more accurately.

According to the invention of claim 10 , in addition to the effects of the invention of any one of claims 6 to 9 , the use of a chain as a wound body includes the dimensions of each surface of the rotary die that is bent and defined. The inner periphery of each link is formed in accordance with the outer peripheral shape, and the link can be bent in accordance with the bending of each surface, and the metal strip part that more accurately follows the outer peripheral shape of the rotating die is formed. be able to.

FIG. 3 is a perspective view of a main part of a bead core having a partial cross section and a bead clip according to the present embodiment bent in a predetermined shape in advance. It is the principal part perspective view made into the partial cross section which shows the state which wound the bead clip which concerns on this embodiment on a bead core, and carried out goze folding. It is a principal part side view of the bead clip molding device concerning the embodiment of the present invention. It is explanatory drawing of the bead clip shaping | molding process of the bead clip shaping | molding apparatus of this embodiment, a rotation die is in an initial position, and shows the clip state of the front-end | tip part 5b of a metal strip member, ie, a bead clip. Also an explanatory view of a bead clip forming process, showing the rear end shear and side pieces 5 ₄ folded metal strip member. Also an explanatory view of a bead clip forming process, showing the side pieces 5 ₃ fold. Also an explanatory view of a bead clip forming step, illustrating the folding side pieces 5 _2. Also an explanatory view of a bead clip forming step, illustrating the folding of the side pieces 5 ₁ and a proximal end portion (rear end of the metal strip member) 5a. It is explanatory drawing of a bead clip shaping | molding process similarly, and shows the state which the rotating die reversed and returned to the initial position with the shape | molded bead clip.

Based on FIG. 1 to FIG. 9, a metal strip component molding apparatus and molding method according to an embodiment of the present invention will be described.
The metal strip part according to the present embodiment is a bead clip used to hold a bead shape by collecting a bundle of bead wires of an automobile tire, particularly a truck / bus tire.

FIG. 1 shows a bead clip 5 wound around a bead core 2 having a substantially square cross section in which bead wires 1 are stacked in five rows and seven stages. In the figure, an arrow R indicates the bead core 2 and, therefore, the outward radial direction of the tire for reference.
The bead core 2 is a bundle of one bead wire 1 wound in an annular shape a plurality of times, and the bead core 2 of the present embodiment has an irregular shape having a parallelogram shape in cross section as shown by a two-dot chain line. The bead wires 1 are arranged in five rows and are stacked in seven stages in the radial direction.

By means of a bead winder (not shown), the bead wire 1 is first wound five times with a minimum diameter to form the first stage, and then the second stage with a winding diameter increased radially outwardly R on the first stage. By forming the eyes one after another, and successively increasing the winding diameter up to the seventh step, the bead wires 1 are stacked in five rows and seven steps to form a bundle, and a bead core 2 having a substantially square cross section is formed.
Depending on the type of tire, a bead core having a combination of 5 rows and 8 rows and other m rows and n stages can be formed.

A bead clip 5 is wound as a clasp around a bead core 2 in which the bead wires 1 are stacked in five rows and seven stages and the cross section is substantially rectangular.
The bead clip 5 of the present embodiment is made of a strip-shaped metal strip member having a thickness t, and is formed in a bent shape as an intermediate metal fitting before winding as shown in FIG.

The bead clip 5 as the intermediate metal fitting before winding has four side pieces 5 ₁ , 5 ₂ , 5 ₃ , 5 ₄ corresponding to the four side surfaces of the bead core 2 having a substantially square cross section from the base end portion 5a. Between the tip 5b and the tip 5b, it is continuously bent in the illustrated clockwise direction (clockwise).
Four side pieces _{5 1,} 5 _2, 5 3, _{5 4} are bent sequentially in the same direction, and the side pieces _{5 1} and the side piece _{5 2} bent at a right angle, the side piece _{5 2} and the side piece 5 ₃ and side pieces ₃ and side pieces ₄ are bent at an obtuse angle.
Then, the tip portion 5b is bent at a right angle in the same direction inward with respect to the side pieces 5 _4, the base end portion 5a is bent at right angles in opposite directions outward to the side pieces 5 _1.

Bead side pieces ₅ 1 of the clip _5, 5 _2, 5 3, _{5 4,} the outer peripheral side surface _{2 1} of each bead core 2, a side _{2 2,} the inner peripheral side surface _{2 3,} corresponding to the other side _{2 4,} side pieces 5 _{1, 5} 2, _{5 3} outer peripheral surface _{2 1} of each bead core 2, a side _{2 2} has a length of approximately the same corresponding to the inner peripheral side surface _{2 3,} side pieces _{5 4} other aspects _{2 4} of the bead core 2 longer includes an extension portion 5e which extends from a portion corresponding to the other side 2 _4, the tip portion 5b provided to its destination.
The proximal end portion 5 a and the distal end portion 5 b are shorter than the side pieces 5 ₁ , 5 ₂ , 5 ₃ .

In the arrangement shown in FIG. 1, the bead core 2 and the bead clip 5 are loaded into a bead clip device (not shown), and the bead clip 5 is further folded. As shown in FIG. The base end portion 5a and the extension portion 5e are wound and folded and fastened (bead clip state).
As shown in FIG. 2, the bead clip 5 wound around the bead core 2 in an annular shape forms a goby fold 5 h on the outer peripheral side surface of the bead core 2.
5 to 27 locations on the circumference of the annular bead core 2 are fastened by the bead clip 5.

In this embodiment, the bead wires 5 are stacked on the bead cores 2 that are stacked in five rows and seven stages, and the bead clips 5 are fastened. However, the present invention can also be applied to other bead cores in m rows and n stages.
In that case, the bead clip 5 has a size and a bent shape corresponding to the size of the bead core 2.
For example, the bead wire 1 becomes superimposed with beams in five rows 8 stages, if the cross section is substantially rectangular bead core 2 is formed, one side 2 ₂ of the bead core 2 corresponding to eight _stages, the length of the other side 2 ₄ The side pieces 5 ₂ , 5 ₄ are set accordingly.

  The present embodiment is a metal band component composed of the metal band member as described above, and a molding apparatus and a mold that can accurately form the bead clip 5 as an intermediate-shaped metal fitting before winding while reducing work time and labor. The method is shown.

FIG. 3 shows a main part of a bead clip molding apparatus (“metal strip part molding apparatus” of the present invention, hereinafter simply referred to as “molding apparatus”) 10 of the present embodiment.
In this specification and claims, when referring to the vertical and horizontal directions or the horizontal direction in the apparatus, a metal strip member 4 to be described later is sent and supplied on FIG. 3 unless otherwise specified. The direction (right direction in the figure) is referred to as “front”, the upper direction in FIG. 3 is referred to as “upward”, and in the figure, the front side of the screen is the right direction and the back side of the screen is the left direction. To do.
In the figure, arrows FR and UP indicate the front and the upper, respectively.

As shown in FIG. 3, the molding apparatus 10 includes a base 11 that is erected on a base 11 a and oriented in the front-rear direction and the up-down direction. A longitudinal frame 20 is attached.
The forward / backward moving frame 20 is provided with an engagement pin 21 that is inserted into a long hole 12 provided in the front-rear direction on the base 11 in the left direction (backward in the figure), and is supported by the base 11 so that it can slide back and forth by the engagement pin 21 Is done.

  In addition, the base plate 11 is fastened to a vertical position at the rear of the right surface by inserting a position adjustment bolt 13 in the front-rear direction so that it cannot be moved in the front-rear direction and is rotatably supported. The front end of the position adjustment bolt 13 is The moving frame 20 is screwed into a female screw hole 23 opened in the rear end surface 22.

The forward / backward moving frame 20 is provided with an opening 24 having parallel front and rear opening sides 25a and 25b extending in the vertical direction at a substantially central portion thereof, and the opening 24 has front and rear edges 25a and 25b. A vertically moving frame 30 is fitted so that the portions 31a and 31b can slide.
The upper and lower end portions 32a and 32b of the vertically moving frame 30 are provided with gaps that do not come into contact with the vertically opening sides 26a and 26b of the opening 25 in the vertically moving motion of the vertically moving frame 30 described later.
In addition, guide rollers 27 sandwiching the vertical motion frame 30 from the front and rear so that the vertical motion frame 30 can be moved in parallel up and down are submerged in the front and rear opening sides 25 a and 25 b of the front and rear motion frame 20. They are in contact with each other and guide the vertical movement of the vertical movement frame 30.

  A rectangular opening 33 having front and rear opening sides 34a and 34b and front and rear opening sides 35a and 35b is provided in the lower half of the front and rear center of the vertical moving frame 30, and the upper and lower opening sides 34a and 34b have upper and lower surfaces. A sliding block 36 that is in sliding contact is mounted.

An eccentric cam circular hole 36a having an axis perpendicular to the front / rear / up / down direction is provided at the center of the sliding block 36. The eccentric cam circular hole 36a has a coaxial eccentric circular cam 37 that can rotate freely without loosening. Is installed.
An eccentric cam drive shaft 38 is fitted to the eccentric cam 37 at a position eccentric by a predetermined distance h from the axis B of the eccentric cam 37 so that the axis direction is parallel to the eccentric cam 37 so as not to rotate relative to each other.

In the state shown in FIG. 3, the eccentric cam drive shaft 38 is rotatably mounted with the axis A positioned at a position vertically below the axis B of the eccentric cam 37 by a predetermined distance h. Is rotated by an eccentric cam / rotary actuator 39 attached to the left surface (the back side in the figure).
Further, when the axis B of the eccentric cam 3 is in a vertically upper or lower position with respect to the axis A of the eccentric cam drive shaft 38, the sliding block 36 is located between the front and rear opening sides 35a and 35b of the rectangular opening 33. Has a gap c of a predetermined distance h or more.

Therefore, when the eccentric cam / rotary actuator 39 rotates and drives the eccentric cam drive shaft 38, the sliding block 36 has a width h in the vertical and backward directions around the axis A of the eccentric cam drive shaft 38 according to the rotational position of the eccentric cam 37. Try to swing around.
As a result, the sliding block 36 is sandwiched between the upper and lower opening sides 34a and 34b within the rectangular opening 33 in the front-rear direction and slides in parallel in the front-rear direction ± h. A vertical movement of ± h is given to the vertical movement frame 30.

FIG. 3 shows a state in which the axis B of the eccentric cam 3 is in a vertically upper position with respect to the axis A of the eccentric cam drive shaft 38. The sliding block 36 and the vertically moving frame 30 In position.
The eccentric cam / rotary actuator 39 is an air actuator and is set to a limited rotation range of 180 degrees.
Therefore, the sliding block 36 and the vertically moving frame 30 are alternately positioned at the lower limit position and the upper limit position by the 180 degree back-and-forth rotation of the eccentric cam / rotary actuator 39.

  The vertical motion frame 30 is provided with a partial slit 40 that extends horizontally in the front-rear direction and is recessed so as to be cut leftward (in the drawing, in the back direction). A metal band member feeding table (hereinafter simply referred to as “table”) 40a on which the metal band member 4 fed from the rear to the front is placed is formed in the portion 40, and is formed in a vertically moving frame 30 above the table 40a. The lower end of the outer peripheral surface abuts on the metal band member 4 on the table 40a, and the feed roll 41 that moves the metal band member 4 forward moves the rotating shaft 41a vertically above the axis A of the eccentric cam drive shaft 38. Are arranged in parallel so as to be movable up and down by a certain amount.

A feed roll / rotary actuator 42 having an output shaft 42a oriented in parallel is attached to the left surface (the back side in the figure) of the vertical movement frame 30 vertically above the rotation shaft 41a of the feed roll 41. The feed roll / rotary actuator 42 is an air actuator, and is set to a limited rotation range of 270 degrees, for example.
An output roll 42c is externally mounted on the output shaft 42a of the feed roll / rotary actuator 42 via a one-way clutch 42b that transmits and transmits only the metal strip member 4 on the table 40a of the slit portion 40 in the feed direction. The output roll 42c rotationally drives the feed roll 41 with frictional contact.

  Also, in the vertically moving frame 30 vertically below the feed roll 41, a receiving roll 43 in which a part of the table 40a is partially omitted and the outer peripheral surface upper end 43b is exposed at the height of the table 40a, the shaft 43a is fed to the feed roll 41. Are arranged in parallel with the rotation shaft 41a.

Accordingly, the feed roll 41 is rotated by the rotation of the feed roll / rotary actuator 42 via the one-way clutch 42b, and the metal strip member 4 on the table 40a is moved forward. The feed roll 41 is rotationally driven by frictional contact. In addition, the rotary shaft 41a is provided so as to be movable up and down by a certain amount.
Therefore, when the feed roll / rotary actuator 42 starts to rotate from the feed rotation start end of the rotation limited range, and the metal strip member 4 reaches the feed end 6f, which will be described later, and stops, the feed roll 41 is easily slip-rotated. Since it can be in a state, the metal band member 4 is stopped at a predetermined feed amount, and the metal band member 4 is prevented from being bent or scratched.

  After that, when the feed roll / rotary actuator 42 is reversely rotated to its feed rotation starting end for the next feed operation, the reverse drive force is not transmitted to the feed roll 41 by the one-way clutch 42b. It is prevented that the belt member 4 is inadvertently pushed back.

  Further, since the metal strip member 4 is sandwiched and fed between the feeding roll 41 and the receiving roll 43, the pressure contact with the table 40a during the feeding operation is reduced, and the feeding resistance can be reduced.

  At the upper limit position of the vertically moving frame 30 shown in FIG. 3, an upper cutter blade 44 is sandwiched between the metal belt member 4 and the table 40a on the front side of the slit portion 40 on the front side of the vertically moving frame 30. The member 4 is fastened so that it can move back and forth.

The upper cutter blade 44 has a width equal to or greater than the left and right width (width from the front to the depth side) of the metal strip member 4 with the lower end aligned with the upper surface of the slit portion 40 and is in contact with the front opening side 25a of the longitudinally moving frame 20. Fastened in position.
On the other hand, below the upper cutter blade 44, the table 40a has a width equal to or greater than the width of the upper cutter blade 44a (the width from the front to the depth side) and has a notch 40b below.

The forward / backward moving frame 20 has a metal strip member supply guide portion (hereinafter simply referred to as “supply guide portion”) extending forward on the front opening side 25a side at the same height as the table 40a at the upper limit position of the vertical movement frame 30. 29) is provided.
The supply guide portion 29 has a vertical clearance that allows the metal strip member 4 to move continuously on the table 40 at the upper limit position, and a width that is equal to or greater than the left-right width (width from the front to the depth side) of the metal strip member 4. The slit part 29a which has is provided.

The front opening side 25a of the front / rear frame 20 is aligned with the upper cutter blade 44 in the front / rear direction so that the upper end is aligned with the lower surface of the slit portion 29a of the slit-shaped supply guide portion 29, and the left / right width ( A lower cutter blade 45 having a width equal to or greater than the width from the near side to the depth side is fastened.
On the other hand, a notch 29b is provided above the lower cutter blade 45.
Further, an introduction portion 28 having a large vertical width through which the metal strip member 4 passes is formed on the side of the rear opening side 25b of the longitudinal frame 20.

As described above, the state shown in FIG. 3, that is, the axis B of the eccentric cam 3 is in the vertically upward position with the distance h increased with respect to the axis A of the eccentric cam drive shaft 38, When the frame 30 and the upper cutter blade 44a are in the upper limit position, the metal band member 4 passes from the rear through the introduction portion 28 and enters the slit portion 40 of the vertical movement frame 30 and is sandwiched between the feed roll 41 and the receiving roll 43. The slit portion 29a of the supply guide portion 29 on the front opening side 25a side of the longitudinally moving frame 20 can be continuously passed through the table 40a, passing between the table 40a and the upper cutter blade 44. At this time, the metal band member 4 is sandwiched between the upper cutter blade 44 and the lower cutter blade 45 at the upper limit position, and is in a state where it can be fed forward.
Then, by the feed roll 41 driven by the feed roll / rotary actuator 42, the front end 4a of the metal band member 4 fed forward reaches a feed end 6f described later, and the movement stops.

Therefore, when the eccentric cam / rotary actuator 39 is rotated 180 degrees from one end to the other end within a limited rotation range of 180 degrees, the eccentric cam drive shaft 38 is rotated, and the eccentric cam 37 is rotated, When the shaft core B of the eccentric cam 37 is moved from vertically upward to vertically downward with respect to the shaft core A of the eccentric cam drive shaft 38, the shaft core B of the eccentric cam 37 becomes h vertically below the shaft core A of the eccentric cam drive shaft 38. 3, that is, from the state shown in FIG. 3, the vertically moving frame 30 is lowered by the distance 2 h and becomes the lower limit position (see FIG. 5).
Therefore, the upper cutter blade 44 is also lowered by 2 h to the lower limit position, and the metal strip member 4 is sheared between the upper and lower cutter blades 44 and 45.

Therefore, by setting the distance L between the feed end 6f and the shear position by the cutter blades 44 and 45 to a predetermined value, the metal strip member 4 is cut to a predetermined length L while being fed to the next process. Can be supplied.
In addition, the predetermined length L is adjusted by moving the shearing position by the cutter blades 44 and 45 back and forth by the position adjusting bolt 13 screwed into the female screw hole 23 opened in the rear end face 22 of the longitudinally moving frame 20. It can be set.
That is, the longitudinally moving frame 20 and the vertically moving frame 30 are fed by the forming roll 10 with the leading end 4a of the metal band member 4 to the feeding end 6f by the operation of the feed roll / rotary actuator 42 and the eccentric cam / rotary actuator 39. The conveyance cutting apparatus 8 which cut | disconnects by length L of this is comprised.

In the base 11, slightly on the right side of the base 11 (front side) slightly in front of the supply guide portion 29 of the longitudinal frame 20, parallel to the eccentric cam drive shaft 38 of the eccentric cam 37 and the output shaft 42 a of the feed roll / rotary actuator 42. The rotary die drive shaft 60a of the rotary die / rotary actuator 60 protruding to the side) is disposed, and the main body of the rotary die / rotary actuator 60 is attached to the left side (the back side in the figure) of the base 11.
The rotary die drive shaft 60a is fitted with a rotary die 6 having a width greater than the width of the metal strip member 4 (the width on the depth side from the front of the drawing).

The rotary die 6 is provided with an outer peripheral side shape on the periphery thereof that follows the inner surface shape of the bead clip 5 formed by bending the metal strip member 4.
The shape of the bead clip 5 shown in FIG. 1, that is, the base end portion 5a, the side pieces 5 _{1 to} 5 _{3, the} side piece 5 ₄ including _the extension portion 5e, and the distal end portion 5b in the illustrated clockwise (clockwise) order. 3, the base end face 6a, the first side face 6 ₁ , the second side face 6 ₂ , the third side face 6 ₃ , the fourth side face 6 ₄ , the tip, in the order of the clockwise (rightward) direction shown in FIG. Surface 6b is formed.
The relationship between the dimension on the inner surface of the bead clip 5 and the dimension on the outer periphery of the rotary die 5 is adjusted in consideration of the plate pressure t of the metal strip member 4 and the like.

  The rotary die / rotary actuator 60 is an air rotary actuator having a rotational angle sufficient for forming the bead clip 5 by the rotary die 6, for example, a limited rotational range of 270 degrees here, and is shown in FIG. As shown in the figure, in the initial state in which the metal band member 4 is fed forward to the feed end 6f, the rotation position is such that the tip surface 6b of the rotary die 6 is positioned horizontally upward. The position of the rotary die drive shaft 60a is set so that the tip 4a is placed on the tip surface 6b.

Further, the rotary die 6, undulating adjacent the illustrated clockwise forward position from the front end face 6b, forming chains ( "wound body" of the present invention, "chain") the first link 7 ₁ of the tip of the 7 A recess 6c and a connecting boss portion 6d for freely connecting pins are formed, and the connecting boss portion 6d also defines the tip of the tip surface 6b.
The front end 4a of the metal strip member 4 fed to the top end surface 6b hits the connection boss portion 6d and stops. That is, the connecting boss portion 6 d also defines the aforementioned feed end 6 f of the metal strip member 4.

Each link of the forming chain 7 which is pinned to the outer periphery of the rotating die 6 in the first link _71, as described below, rotary die 6 is rotated in the clockwise direction, sandwiching the metal strip member 4 rotates When wound around the die 6, it is formed so as to constitute an inner peripheral side shape that follows the outer peripheral side shape of the rotary die 6.
That is, the first link _71, when wrapped around the rotary die 6 after having been fed to the tip 4a of the metal strip member 4 can feed end 6f as shown in FIG. 3, rotating the metal strip member 4 die 6 A first inner periphery 70 ₁ (see FIG. 4) that coincides with the front end surface 6b in a state of being sandwiched between the front end surface 6b and the front end surface 6b.

The second link _{7 2} and the fourth side surface _{6 4,} third link _{7 3} and the third side face _{6 3,} fourth link _{7 4} and the second side surface _{6 2,} fifth link _{7 5} and the first side surface ₆₁ and proximal surface 6a is formed in a similar relationship.
That is, the range sandwiching a metal strip member 4 when the molding chain 7 is wound around the rotary die 6, the inner circumference side shape of the range of the first link 7 _{1 through} 5 link 7 _5, the outer peripheral side of the rotary die 6 It follows the shape.

The rear end side of the forming chain 7 is wound around a chain drum 75a provided above the right side of the base 11 (the front side in the figure).
The chain drum 75a is weaker than the unwinding force Fa of the forming chain 7 due to the rotation of the rotary die / rotary actuator 60 in the clockwise direction shown in the figure by the chain / rotary actuator 75 attached to the left side of the base 11 (the back side in the figure). A rotational biasing force is applied as indicated by a broken line arrow so as to generate a rewinding force Fb in the reverse direction.
Therefore, when the bead clip 5 is molded, tension is always applied to the molding chain 7 by the rewinding force Fb from the initial state shown in FIGS. 3 and 4, and the molding chain 7 is slackened, thereby hindering the molding operation. It is prevented.

  As with the rotary die / rotary actuator 60, the chain / rotary actuator 75 has a sufficient rotation angle corresponding to unwinding of the forming chain 7 by the rotary die / rotary actuator 60, for example, limited rotation of 270 degrees here. An air rotary actuator having a range.

  In FIG. 3, reference numeral 9 denotes a pressing mechanism, and the molding chain 7 is placed on the outer peripheral side of the molding chain 7 at a position where the molding chain 7 tries to sandwich the metal strip member 4 with the rotary die 6. This is to make the molding applied to the metal strip member 4 more reliable by pressing toward the rotary die 6.

  The pressing mechanism 9 includes an air cylinder 9a mounted obliquely downward on the right surface (front surface of the hand in the figure) of the base 11, a cylinder rod 9b protruding obliquely downward, and an axis parallel to the rotary die drive shaft 60a at the tip of the cylinder rod 9b. A presser roll 9c is provided around the presser roll 9c so that the presser roll 9c is urged toward the side to be pushed out.

  From the state shown in FIG. 3, the rotary die / rotary actuator 60 continuously rotates in the clockwise direction shown in the figure from one rotation start end to the other rotation end of a limited rotation range of 270 degrees for molding. When the chain 7 is wound around the rotating die 6 with the metal band member 4 interposed therebetween, the bead clip 5 is continuously formed between them as described below.

Hereinafter, based on FIG. 4 to FIG. 9, a method of forming the bead clip 5 as the metal strip part in the present embodiment will be described.
4 to FIG. 9 schematically show the main part of a modified example of the molding apparatus 10, and the front opening side 25 a of the longitudinally moving frame 20, the vicinity of the supply guide portion 29, and the vertically moving frame 30. Feed roll 41 and sliding block 36, eccentric cam 37, eccentric cam drive shaft 38, eccentric cam / rotary actuator 39, rotary die 6, rotary die drive shaft 60a, rotary die / rotary actuator 60, molding chain 7, chain drum 75a and the pressing mechanism 9 are shown, and the others are not shown.

4 to 9, the modification of the molding apparatus 10 is partially different in shape from the molding apparatus 10 shown in FIG. 3, but the means for conveying and cutting the metal strip member 4, the rotary die 6 and the molding chain 7 are different. 3 is substantially the same as that of FIG. 3 with respect to the forming means of the metal strip member 4 and the configuration and shape of the rotary die 6 and the forming chain 7.
Accordingly, parts corresponding to those in FIG. 3 are given the same reference numerals and will be described below.

FIG. 4 shows an initial state of the molding process similar to that shown in FIG. 3, wherein the rotary die / rotary actuator 60 is at the rotation start end of the limited rotation range, and the metal strip member 4 is in front of the feed end 6f. The tip 4a of the metal strip member 4 fed in the direction is placed on the tip surface 6b of the rotary die 6 positioned horizontally upward.
The upper cutter blade 44 of the vertical movement frame 30 is at the upper limit position depending on the position of the eccentric cam 37 of the vertical movement frame 30, and continues from the table 40 a of the vertical movement frame 30 to the supply guide portion 29 of the vertical movement frame 20. 4 is in a position where it can pass.

The first link 7 ₁ of the forming chain 7 is pin-connected with the first pin 71 ₁ to the connecting boss 6d of the rotating die 6, the distal end surface of the rotary die 6 in a state sandwiching the metal strip member 4 by the pressing roll 9c It is pressed to 6b and is in the state of the front end clamp of the metal band member, and the portion to be the front end portion 5b of the bead clip 5 to be molded is clamped.
First inner peripheral 70 of the _first link ₇₁ which is pressed against the distal end surface 6b is formed so as to follow the length and angle of the distal end surface 6b.

  Before the transition from the state shown in FIG. 4 to the state shown in FIG. 5, the upper cutter blade 44 is moved to its lower end position shown in FIG. The metal strip member 4 is cut into a predetermined length L by shearing by 44 and 45.

Next, when the rotary die 6 is rotated in the clockwise direction, as shown in FIG. 5, when rotated by the distal end surface 6b and the fourth side surface 6 ₄ and forms an angle of supplementary (perpendicular), first the second link 7 ₂ of the link ₇₁ is pin-connected with the second pin 71 _2, pressed in a state of sandwiching the metal strip member 4 by the pressing roll 9c to the fourth side surface 6 ₄ of the rotary die 6 is formed side pieces 5 ₄ become part of the bead clip 5 is folded. Further, the metal strip member 4 whose rear end is cut is pulled in as the rotary die 6 rotates.
Fourth side 6 within the second neighborhood 70 of the _second link 7 ₂ pressed against the ₄ is formed so as to follow the length and angle of the fourth side 6 _4.
In this case, each link of the third link 7 ₃ later, the unwinding force Fa of the rotating die rotary actuator 60 described above, since slack is prevented by the tension due to reverse unwinding force Fb of the chain drum 75a It will not interfere with the molding operation.

Then, be rotated further illustrated clockwise rotary die 6, when only rotated fourth side 6 ₄ and the third side face 6 ₃ and forms an angle of supplementary (acute), as shown in FIG. 6, third link 7 ₃ which is pin-connected with the third pin 71 ₃ to the second link 7 _2, similarly pressed against the third side 6 ₃ of the rotary die 6, the side pieces ₃ of the bead clip 5 to be molded The part to be folded.
Third inner peripheral 70 ₃ of the third link 7 ₃ pressed against the third side surface 6 ₃ are formed so as to follow the length and angle of the third side 6 _3.

Then, it is rotated further illustrated clockwise rotary die 6, when only is rotated third side 6 ₃ and the second side surface 6 ₂ and forms an angle of supplementary (acute), as shown in FIG. 7, fourth link 7 ₄ which is pin-connected at a fourth pin 71 ₄ to the third link 7 _3, likewise second pressed against the side face 6 _{and second} rotary die 6, a side piece 5 ₂ beads clip 5 to be molded The part to be folded.
Fourth in the peripheral 70 ₄ of the fourth link 7 ₄ pressed against the second side face 6 ₂ is formed so as to follow the length and angle of the second side surface 6 _2.

Then, it is rotated further illustrated clockwise rotary die 6, when rotated by the second side surface 6 ₂ and the first side surface ₆₁ and forms an angle of supplementary (perpendicular), as shown in FIG. 8, the 4 link 7 ₄ 5 link 7 ₅ which is pin-connected with the fifth pin 71 ₅ similarly pressed against the first side face 6 ₁ of the rotary die 6, the side pieces 5 ₁ bead clip 5 to be molded The part is bent.
Chapter 5 in the peripheral 70 ₅ of the fifth link 7 ₅ pressed against the first side face 6 ₁ is formed so as to follow the length and angle of the first side face 6 _1.
The rear end portion 7 _{5 a} fifth link 7 ₅ is formed at a right angle near the outer circumferential direction from the fifth in the peripheral 70 _5, this time, the first wall part direction perpendicular from 6 ₁ of the rotary die 6 Since the base end surface 6a is formed so as to coincide with the metal band member 4 in a sandwiched state, the portion to be the base end portion 5a of the bead clip 5 to be molded is perpendicular to the reverse direction. It can be bent.

In the cutting at the stage before the transition from the state of FIG. 4 to FIG. 5, the metal strip member 4 is set by setting the distance L between the shearing position by both the cutter blades 44a and 44b and the feed end 6f to a predetermined one. The molded bead clip 5 is cut so as to obtain a base end 5a, side pieces 5 _{1 to} 53 _, side pieces 5 ₄ including _an extension 5e, and a tip 5b having predetermined dimensions.
Accordingly, the in 5 link 7 ₅ between the rear portion 7 _{5 a} and proximal end surface 6a of the rotary die 6 of the base end portion of the bead clip 5 of predetermined dimensions at the rear end portion of the metal strip member 4 which has been cut 5a is formed.
Note that the dimensions of the outer periphery of the rotating die 6, the relationship between the dimensions of each link 7 _{1-7 5} of the respective inside peripheral 70 _{1-70 5} of the forming chain 7, plate thickness t etc. of the metal strip member 4 Adjusted to take into account.

As described above, while the rotary die / rotary actuator 60 rotates clockwise from the start side of the limited rotation range to the end of rotation of the other end side in the clockwise direction, A forming step of forming the metal strip member 4 into the bead clip 5 is performed.
Rotational end of the rotary die 6, at least limit the range of rotation of the rotary die rotary actuator 60 so that the state shown in FIG. 8 are set, the trouble in the link 7 ₆ followed link 7 ₅ molding As long as it does not occur, the rotation may be stopped beyond the state shown in FIG.

  In the meantime, the presser roller 9c of the pressing mechanism 9 is always at a position where the forming chain 7 tries to sandwich the metal strip member 4 between the rotary die 6 until the bending is completed. Is pressed toward the rotary die 6, so that the metal band member 4 is more reliably formed between the rotary die 6 and the forming chain 7, and the bead clip as a metal band part with higher accuracy is obtained. 5 is obtained.

When the bending is completed, as shown in FIG. 9, the pressing roller 9c of the pressing mechanism 9 is raised and retracted, the rotary die / rotary actuator 60 is released, and the unwinding force Fa of the forming chain 7 is stopped. The chain drum 75a is rotationally driven so as to rewind the forming chain 7 by the rewinding force Fb in the reverse direction of the chain drum 75a.
Accordingly, the rotating die 6 rotates counterclockwise (counterclockwise) as the forming chain 7 is unwound, and the rotating die / rotary actuator 60 returns to the rotation start end of the limited rotation range, and the connecting boss vertically upwards. The part 6d is positioned and the rotary die 6 stops.

  On the other hand, the upper cutter blade 44 is moved to the upper end position thereof as shown in FIG. 9 by the rotation of the eccentric cam 37 of the vertical motion frame 30, and the upper cutter blades 44 and 45 are formed in the slit portions of the vertical motion frame 30. It is a position where the metal strip member 4 can be continuously passed from the 40 tables 40a to the slit portion 29a of the supply guide portion 29 of the back and forth motion frame 20.

  Thus, after the bead clip 5 molded in the state of FIG. 9 is taken out, the metal belt member 4 is fed from the rear to the front by the feed roll 41 to the feed end 6f as the next bead clip 5 forming step. Then, the presser roller 9c of the pressing mechanism 9 protrudes downward and presses the forming chain 7, and the state shown in FIG. 4 is obtained.

  Therefore, according to the molding apparatus 10 and the molding method of the present embodiment as described above, the metal strip member 4 can be cut and bent a plurality of times with high accuracy, and is a metal strip component made of the metal strip member 4. The bead clip 5 as an intermediate-shaped metal fitting before being wound around the bead core 2 can be formed with high accuracy without variations in working time and labor, and automatic processing becomes possible.

In the molding apparatus 10 and the molding method of the present embodiment, it is possible to easily cope with a case where the dimensions and shape of the bead core 2 are changed.
As described above, when the bead wire 1 is a bead core 2 having a combination of m rows and n stages different from that of the above embodiment, the bead clip 5 has a shape corresponding to the size of the bead core 2 and a bent shape.
For example, the bead wire 1 becomes superimposed with beams in five rows 8 stages, if the cross section is substantially rectangular bead core 2 is formed, one side 2 ₂ of the bead core 2 corresponding to eight _stages, the length of the other side 2 ₄ The side pieces 5 ₂ , 5 _{4 of the} bead clip 5 are set accordingly.

Therefore, by adjusting and setting the distance L between the shearing position by the upper and lower cutter blades 44 and 45 and the feed end 6f in accordance with the entire length of the bead clip 5 in that case, the metal band member 4 is set to a predetermined length L. Can be cut and supplied.
The predetermined length L is adjusted by moving the shearing position by the upper and lower cutter blades 44, 45 back and forth with the position adjusting bolt 13 screwed into the female screw hole 23 opened in the left end face 22 of the forward / backward moving frame 20. it can.
Further, the rotating die 6 and the forming chain 7 can be easily dealt with in a short time by replacing them with ones formed in accordance with the changed shape and dimensions of the bead clip 5.
Also in that case, the forming method of the metal strip member 4 by the rotary die 6 and the forming chain 7 is the same.
That is, at the time of size switching in tire manufacture, it is possible to efficiently cope with the formation of the bead clip 5 which is an intermediate metal fitting.

  Therefore, by automatically and accurately forming the bead clip 5 as a metal strip component by the molding apparatus 10 and the molding method of the present embodiment, a bead core formed by a deformed bead winder in automobile tire manufacture. On the other hand, since a clipping process can be automatically added, it is possible to contribute to the configuration of a highly productive system in tire manufacture.

  Hereinafter, the features of the metal band part molding apparatus and molding method according to the embodiment of the present invention will be described.

The metal band component molding apparatus 10 and the molding method of this embodiment include a rotating die 6 having an outer peripheral shape that follows the inner surface shape of a bead clip 5 formed by bending the metal band member 4, and the metal band member 4. A molding chain 7 is provided which is sandwiched between the outer periphery of the rotary die 6 and wound around the rotary die 6 by the rotation of the rotary die 6.
Therefore, since the forming chain 7 is wound around the rotating die 6 by the rotation of the rotating die 6, the metal band member 4 is pressed and wound around the outer periphery of the rotating die 6 by the forming chain 7. The metal strip member 4 is continuously formed into a bead clip 5 having an inner surface shape that follows the outer peripheral shape of the rotary die 6, and the work time and labor can be reduced, and the bead clip 5 can be automatically processed. .

Further, molding the chain 7, the first link ₇₁ of the tip on the outer periphery of the rotary die 6 is contoured freely coupled by a pin coupling.
Therefore, molding the chain 7 is, since it is wound around the rotary die 6 in terms of sandwiched tip 4a of the metal strip member 4 from the junction of the first link 7 ₁ of the rotary die 6 of the tip, bead clips 5, Molded accurately without variation.

Further, feeding the leading end 4a of the metal strip member 4 to the first link ₇₁ of the coupling portion of the distal end of the forming chain 7, back-and-forth movement frame 20 and vertically movable to configure the conveyor cutting device 8 for cutting a predetermined length L And a frame 30.
Therefore, since the metal strip member 4 is cut and supplied to the predetermined length L by the forward / backward moving frame 20 and the up / down moving frame 30 of the conveying / cutting device 8, the bead clip 5 is more accurately formed without variation. Is done.

  Further, since the inner peripheral side shape of the molding chain 7 when the molding chain 7 is wound around the outer periphery of the rotary die 6 is formed following the outer peripheral side shape of the rotary die 6, The metal strip member 4 sandwiched between the molding chains 7 is more accurately bent and formed.

  Further, a pressing mechanism 9 that presses the forming chain 7 toward the rotating die 6 on the outer peripheral side of the forming chain 7 at a position where the forming chain 7 attempts to sandwich the metal strip member 4 with the rotating die 6. Therefore, the pressing mechanism 9 allows the forming chain 7 to be tightly wound around the rotating die 6 with the metal band member 4 sandwiched therebetween without loosening, so that the bead clip 5 that is bent and formed more accurately can be obtained.

The molding chain 7, when wound around the outer circumference of the rotating die 6 to sandwich the metal strip member 4, a peripheral 70 _{1-70 5} among the inner forming peripheral shape following the outer peripheral shape of the rotary die 6 since comprised of a chain having a plurality of links 7 _{1-7 5,} each surface 6a of the rotary die 6 was made bent painting, 6 1 to 6 _{4, 6b} to follow dimension to the outer peripheral shape including among each link around it is formed, and, since the foldable link 7 _{1-7 5} in line with the folding of each side, folding the rotary die 6, the outer peripheral shape, bead clips 5 that follows more accurately is molded.

As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment, Of course, various aspects are included in the range of the summary of each claim.
For example, in the embodiment, a forming chain is shown as the “wrapping body” of the present invention, but the “wrapping body” includes other forms, and the outer periphery of the rotary die Even if it is a belt-like body whose tip is undulated freely, it can be carried out when the outer periphery of the rotary die is composed of a curved surface or a flat bent portion that is convex on the outer peripheral side. It is more preferable if it comprises a pin connection part corresponding to the part.
Further, the specifications (drive source, rotation angle, etc.) of each rotary actuator do not limit the present invention.
In the present embodiment, the bead clip 5 for the bead core 2 of the automobile tire member is shown as the metal band component of the present invention. Similarly, the metal band member is cut and bent to form a metal for other purposes. Band parts are also included in the scope of the molding apparatus and molding method of the present invention.

DESCRIPTION OF SYMBOLS 4 ... Metal strip member, 4a ... Tip, 5 ... Bead clip ("metal strip part" of the present invention), 6 ... Rotating die, 6d ... Connection boss part, 6f ... Feed end, 7 ... Chain for molding (present invention) , "Crossed body", "Chain"), 8 ... Conveying and cutting device, 9 ... Pressing mechanism, 10 ... Molding device (bead clip molding device, "Molding device for metal strip parts" of the present invention), 20 ... Previous movement Frame, 24 ... Opening part, 29 ... Supply guide part (metal strip member supply guide part), 29a ... Slit part, 30 ... Vertical movement frame, 33 ... Rectangular opening, 37 ... Eccentric cam, 38 ... Eccentric cam drive shaft, 39 ... Eccentric cam / rotary actuator, 40 ... Slit, 40a ... Table (metal strip member feed table), 41 ... Feed roll, 42 ... Feed roll / rotary actuator, 44 ... Upper cutter blade, 45 ... Lower cutter blade, 60 ... Rotary die / rotary actuator, 60a ... Rotating die drive shaft, 75 ... Chain rotary actuator, 75a ... Chain drum

Claims (10)

A rotating die having an outer peripheral shape that follows the inner surface shape of a metal band component formed by bending a metal band member;
The metal strip member is sandwiched between the outer periphery of the rotating die, and a wound body wound around the rotating die by the rotation of the rotating die,
A pressing mechanism that presses the wound body in a position where the wound body sandwiches the metal band member between the rotating die and the urged presser roll toward the rotating die. A metal strip part forming device.   2. The metal band part forming apparatus according to claim 1, wherein a tip of the wound body is coupled to an outer periphery of the rotary die so as to be raised and lowered.   3. The metal band component according to claim 2, further comprising a conveying and cutting device that feeds a leading end of the metal band member to a joint at a leading end of the wound body and cuts the metal band member by a predetermined length. Molding equipment.   The inner periphery side shape of the wound body when the wound body is wound around the outer periphery of the rotary die follows the outer peripheral side shape of the rotary die. An apparatus for forming a metal strip part according to any one of the above. The wound body is a chain provided with a plurality of links having an inner periphery that forms an inner peripheral shape that follows the outer peripheral shape of the rotating die when wound around the outer periphery of the rotating die with the metal band member interposed therebetween. The apparatus for forming a metal strip part according to any one of claims 1 to 4 , wherein the apparatus is provided. The metal band member is sandwiched between the rotating die and a winding body wound around the outer periphery of a rotary die having an outer peripheral shape that follows the inner surface shape of the metal band part formed by bending the metal band member. The presser roll urged by the pressing mechanism presses the wound body at a position where the wound body sandwiches the metal band member between the rotating die and rotates the rotating die. And forming the metal band member in accordance with the outer peripheral shape of the rotating die. 7. The method of forming a metal strip part according to claim 6 , wherein the wound body has a tip end coupled to the outer periphery of the rotary die so as to be raised and lowered. The metal band member forming method according to claim 7 , wherein the tip of the metal band member is fed to a joint at the tip of the wound body, and the metal band member is cut at a predetermined length. Claim 6 as the wound body, the inner circumferential side shape of the wound body when wrapped around the outer periphery of the rotary die, is characterized by using what is following the outer periphery shape of the rotary die The method for forming a metal strip part according to claim 8 . As the wound body, a chain provided with a plurality of links having an inner periphery that forms an inner peripheral shape that follows the outer peripheral shape of the rotating die when wound around the outer periphery of the rotating die with the metal band member interposed therebetween. The method for forming a metal strip part according to any one of claims 6 to 9 , wherein the method is used.

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