JP5503444B2 - Ply material cutting device - Google Patents

Description

  The present invention relates to a ply material cutting device capable of cutting a wide ply material, in which an array of organic fiber tire cords is covered with a topping rubber, into a plurality of narrow plies without cutting the tire cord with high accuracy. .

  A radial tire having a structure in which a band layer formed by spirally winding a tire cord is provided outside a belt layer is widely known. In order to form this band layer, usually, as shown in FIG. 12A, a small width in which the top and bottom surfaces of a cord array A formed by aligning organic fiber tire cords A1 in parallel are covered with a topping rubber B. The belt-like ply P is used.

  On the other hand, in order to produce the belt-like ply P at a low cost and efficiently, conventionally, as shown in FIG. 12 (B), a wide ply material S having an integral multiple of the belt-like ply P is formed by a calendar device. The ply material S is formed in advance by a topping process, and then, the ply material S is cut by a plurality of cutters e to form a plurality of belt-like plies P. Usually, for example, the ply material S having a width of about 1450 mm is cut into a primary belt-like ply P1 having a width of about 110 mm, for example, and then the primary belt-like ply P1 having a width of about 11 mm is further obtained. It is divided into multiple stages such as cutting into the belt-like ply P. At this time, in order to obtain the belt-like plies P1 and P2 with a predetermined set width, each cutter is fixed at an interval corresponding to the set width at each stage.

  However, strictly speaking, the cord arrangement density is not uniform in the ply material S, and the tire cord A1 also meanders or is inclined to some extent. Therefore, when the ply material S is cut at a set width with the cutter fixed, the tire cord A1 such as meandering is also cut together, and there are a portion with a large number of cords and a portion with a small number of cords in one belt-like ply P. Or the number of cords differs between the belt-like plies P, P.

  And the belt-like ply P having such a large number of cords can cause a decrease in tire uniformity.

  Therefore, in Patent Document 1 below, it is proposed that the identification code is mixed in the ply material at intervals corresponding to the width of the belt-like ply, and is held freely movable in the width direction without fixing the cutter. Yes. Thereby, since the cutter moves freely between the tire cords, the topping rubber can be cut between the tire cords without cutting the tire cords, and it is possible to form a highly accurate belt-like ply having a certain number of cords. .

JP 2002-321290 A

  However, when the cutter can be moved freely in the width direction, the cutter position becomes indeterminate, so when cutting the next ply material, it takes a lot of time and labor to align each cutter. The problem of damaging arises.

  Therefore, the present invention is based on providing an alignment means that can align the cutter with the reference position in the width direction, and can efficiently align each cutter when cutting the next ply material. It aims at providing the ply material cutting device which can improve work efficiency.

In order to solve the above-mentioned problems, the invention of claim 1 of the present application is to cut a wide ply material in which an array of organic fiber tire cords aligned in parallel with a topping rubber is cut by a cutting means, A ply material cutting device for forming a narrow belt-like ply by dividing into a plurality of
The cutting means is a guide rail extending in the width direction,
The cutter holder is guided by the guide rail and can freely move in the width direction, and a cutter attached to the cutter holder. The cutter holder can freely move in the width direction so that the tire cords can be moved between the tire cords without being cut. Cutting tool capable of cutting topping rubber,
And prior to the cutting, comprising a positioning means for positioning the cutting tool to a reference position in the width direction,
The positioning means protrudes in a direction perpendicular to the width direction from the cutter holder, and a positioning convex portion having a tapered portion at a tip thereof,
It can be moved forward and backward toward the positioning convex part, and can be fitted to the taper portion by moving forward to align the cutting tool with a reference position, and it can be freely moved in the width direction by opening the cutting tool by retreating. And an alignment body provided with a positioning recess at the front end.

  According to a second aspect of the present invention, the alignment body is provided with guide surfaces for guiding the positioning convex portion to the positioning concave portion on both sides in the width direction of the positioning concave portion so as to incline backward toward the positioning concave portion. It is characterized by having.

  According to a third aspect of the present invention, the alignment body is attached to a rod of a cylinder, and can be moved forward and backward toward the positioning convex portion by expansion and contraction of the rod.

  According to a fourth aspect of the present invention, the cutter holder has a cutting posture in which the cutter can contact the ply material and cut the ply material, and a non-cutting posture that is separated from the ply material and does not cut the ply material. It is characterized by comprising posture changing means that can change posture.

  In the invention of claim 5, the posture changing means holds the cutter so as to be able to turn around an axis parallel to the width direction, and moves between the cutting posture and the non-cutting posture by the turning. It is characterized by that.

  As described above, the present invention includes alignment means. Therefore, the cutting tool that becomes indefinite after cutting the ply material can be preset to the reference position in the width direction. Therefore, prior to cutting the next ply material, the cutter can be set between predetermined tire cords by finely adjusting each cutting tool from the reference position, so that the positioning operation becomes easy. Efficiency can be improved.

It is a side view which shows notionally the strip | belt-shaped ply manufacturing apparatus incorporating the ply material cutting device of this invention. It is drawing which looked at the ply material cutting device from the lower side. It is an enlarged view which expands and shows the principal part of a ply material cutting device. It is a perspective view which shows the said principal part. It is a side view which shows the said principal part. (A), (B) is an effect | action figure of a positioning means. (A), (B) is sectional drawing explaining the identification mark formation method of a ply material. It is a side view which shows notionally the other example of the ply material cutting device. It is a perspective view which shows the cutting means used for it. (A), (B) is the side view of the cutting | disconnection means, and a front view. (A)-(C) are explanatory drawings which show a posture change means and its operation. (A) is a perspective view which shows a strip | belt-shaped ply, (B) is a conceptual diagram explaining the formation method.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a side view conceptually showing a belt-like ply manufacturing apparatus 1 incorporating a ply material cutting device 3 of the present invention. In FIG. 1, the belt-like ply manufacturing apparatus 1 includes a ply material supply unit 2 that supplies a wide ply material S, and a ply material cutting that cuts the ply material S in the width direction X to form a plurality of belt-like plies P. The apparatus 3 and the winding means 4 which winds each cut strip | belt-shaped ply P in roll shape are provided.

  In the first embodiment, the strip ply manufacturing apparatus 1 cuts a primary strip ply P1 having a width of approximately 110 mm from a ply material S having a width of approximately 1450 mm, which is a raw material previously formed by a topping process by a calendar device. The case where it forms is illustrated. Each primary belt-like ply P1 is formed into a secondary belt-like ply P2 having a width of about 11 mm by using a similar ply material cutting device in the next step. Used as a band forming member for radial tires.

  In this example, the tire cords A1 of the cord array A are arranged on the surface of the ply material S every n pieces so that a fixed number (n) of tire cords A1 are arranged in the secondary belt-like ply P2. An identification mark for classification is formed. Here, although the arrangement state of the tire cords appears as a striped pattern on the surface of the ply material, as shown in FIG. 7A, an identification code A1a in which the cord structure is different from other tire cords every n pieces. Or by changing the code interval G every n pieces as shown in FIG. 7B, the difference appears as a pattern change on the surface of the ply material. Therefore, in this example, this pattern change is used as an identification mark. When the cord structure is different, the identification mark can be formed by changing the twist direction of the cord, changing the thickness of the cord, and / or changing the number of twists of the cord.

  Next, the ply material supply means 2 of the manufacturing apparatus 1 is a so-called roll stand that holds the roll body SR wound up with the ply material S so as to be freely rewound, and is rotated by an electric motor (not shown). The ply material S rewound from the roll body SR is supplied to the ply material cutting device 3 through the guide roller 5.

  The ply material cutting device 3 includes cutting means 6 for cutting the ply material S in the width direction X to form a plurality of belt-like plies P1, as shown in FIG. The cutting means 6 includes a guide rail 7 extending in the width direction X, a cutting tool 8 having a cutter 14 which is guided by the guide rail 7 and can freely move in the width direction X, and the cutting tool 8 is moved in the width direction X. Positioning means 9 which can be aligned with the reference position J.

  As shown in FIGS. 4 and 5, the guide rail 7 includes, for example, a mounting plate 27, a base beam 12 and the like on the support beam 11 spanned between the side plates 10a of the frame 10 (shown in FIG. 2). Attached through.

  The guide rail 7 is provided with a movable table 13 which is guided by the guide rail 7 and can freely move in the width direction X. The moving table 13 moves in the width direction X with a small force so that it can move to the side away from the tire cord A1 under the contact pressure when the cutter 14 contacts the tire cord A1 and tries to cut the cord. It must be possible. For this reason, as the movable table 13, a built-in ball capable of rolling a guide groove 7 a provided in the guide rail 7 can be suitably used. A so-called linear bearing 17 can be suitably used as the guide rail 7 and the moving table 13.

  Next, the cutting tool 8 includes a cutter holder 15 that can be freely moved in the width direction X by being fixed to the movable table 13, and a cutter 14 attached to the cutter holder 15, and the cutter holder 15 is arranged in the width direction X. The cutter 14 can move freely between the tire cords A1 and A1, and can cut the topping rubber B between the tire cords A1 and A1 without cutting the tire cord A1.

  The cutter holder 15 has a holder base 16 fixed to the movable table 13 by screws, and the cutter 14 is placed between the left and right divided pieces 16a and 16a of the holder base 16 at a right angle to the width direction X. The blade edge 14e is sandwiched and held toward the upstream side in the conveying direction of the ply material S. In order to facilitate cutting into the topping rubber B, the cutter 14 is preferably inclined at an angle α of 90 ° or less with respect to the surface of the ply material S as shown in FIG.

  Next, as shown in FIGS. 3 and 4, the positioning means 9 includes a positioning projection 20 projecting in a direction perpendicular to the width direction X from the cutter holder 15, and back and forth toward the positioning projection 20. And an alignment body 21 that can move forward and backward. The positioning projection 20 has a tapered portion 20A extending in a tapered manner at the tip. The taper angle θ1 of the taper portion 20A is not particularly restricted but is set to about 10 to 40 °.

  Further, in this example, the alignment body 21 is attached to the rod 22a of the cylinder 22 supported by the support bar 11, and can move forward and backward toward the positioning convex portion 20 by the expansion and contraction of the rod 22a. Reference numeral 23 in the drawing is a guide shaft built in the cylinder 22. In addition, a positioning recess 24 is formed at the front end of the alignment body 21 so that the cutting tool 8 can be aligned with the reference position J by fitting with the tapered portion 20A by advancement. The positioning recess 24 can freely move in the width direction X by opening the cutting tool 8 by the retraction of the alignment body 21. The positioning recess 24 has an inclined surface portion 24A that is inclined at the same gradient as the tapered portion 20A.

  Further, in this example, guide surfaces 25 that are inclined rearward toward the positioning recess 24 are formed on both sides of the positioning recess 24 in the width direction X at the front end of the alignment body 21. As shown in FIGS. 6 (A) and 6 (B), the guide surface 25 comes into contact with the misaligned positioning convex portion 20 when the alignment body 21 moves forward, and the positioning convex portion 20 becomes the positioning concave portion 24. Can be guided. Note that the angle θ2 of the guide surface 25 in the width direction X is preferably in the range of 10 to 45 °. A plurality (four in this example) of alignment bodies 21 are coupled to one cylinder 22 via a coupling plate 26.

  In addition, it is preferable to provide an angle adjusting means capable of adjusting the phase j of the support bar 11 around the axis i (shown in FIG. 4) of the support bar 11 between the support bar 11 and the side plate 10a. Accordingly, the angle α of the cutter 14 with respect to the ply material S can be freely adjusted.

  Next, in FIGS. 8 to 11, the primary belt-like ply P <b> 1 cut from the original fabric in the first embodiment is used as a ply material S, and the primary belt-like ply P <b> 1 is further cut to be a secondary band forming member. The ply material cutting device 30 of 2nd Embodiment which forms the strip | belt-shaped ply P2 of this is illustrated.

  This ply material cutting device 30 is also the same as the ply material cutting device 3 of the first embodiment, and is guided by the guide rail 7 extending in the width direction X and the guide rail 7 as shown in FIGS. A cutting means 6 having a cutting tool 8 that can freely move in the width direction X and an alignment means 9 that can align the cutting tool 8 with a reference position J in the width direction X is provided.

  In this example, the guide rail 7 is fixed to the side plate 10a of the frame 10 at one end and extends in the width direction X, for example, to a small support rod 11 having a rectangular shaft shape, via a mounting plate 27 and a base beam 12. It is attached. Since the secondary belt-like ply P2 has a small width of about 11 mm, for example, it is not possible to arrange a plurality of cutting tools 8 on a single guide rail 7 in a straight line as in the first embodiment. Have difficulty. Accordingly, in this example, as shown in FIG. 8, a plurality of support bars 11 are arranged in a row at intervals in the transport direction of the belt-like ply P <b> 2, and the cutting tool 8 is attached to each support bar 11. Note that reference numeral 29 in FIG. 10 is an angle adjusting means, and the angle α of the cutter 14 can be freely adjusted by holding a columnar portion 11A provided at one end of the support bar 11.

  Each guide rail 7 is provided with a cutting tool 8 including a cutter holder 15 that can freely move in the width direction X via a moving table 13 guided by the guide rail 7 and a cutter 14 that is attached to the cutter holder 15. Is done.

  The cutter holder 15 of this example includes, for example, a vertically long holder base 31 fixed to the movable table 13, a cutter mounting plate 32 that holds the cutter 14, and a cutter 14 that is held by the cutter mounting plate 32. There is provided posture changing means 33 capable of changing the posture into a cutting posture Y1 that can cut the ply material S in contact with the material S and a non-cutting posture Y2 that is separated from the ply material S and does not cut the ply material S. .

  The posture changing means 33 pivotally attaches, for example, one end portion (upper end portion in this example) of the cutter mounting plate 32 to the holder base 31 so as to be rotatable around an axis line 34i parallel to the width direction X. A pivot shaft 34 is included. The cutter 14 can be switched between the cutting posture Y1 and the non-cutting posture Y2 by turning the cutter mounting plate 32. The posture changing means 33 includes a stopping means 35 that can stop the cutter 14 turning via the cutter mounting plate 32 in the cutting posture Y1 and the non-cutting posture Y2, respectively.

  As schematically shown in FIG. 11, the stopping means 35 includes first and second guide holes 36a and 36b provided in the cutter mounting plate 32 and parallel to the axial center line 34i, and the first and second guide holes 36a and 36b. The first and second pressing plate fittings 38 integrally provided with the first and second sliding pins 37a and 37b which are slidably inserted into the two guide holes 36a and 36b. A spring 42 that is externally inserted into the sliding pins 37a and 37b and a guide groove 39 that is provided in the holder base 31 and guides the first sliding pin 37a are provided.

  Specifically, the push plate metal 38 projects the first and second slide pins 37a and 37b on one surface of the push plate 40, and the first and second slide pins 37a and 37b. Heads 41a and 41b are bulged at the tip of the head. The spring 42 has a coil spring shape, and is externally inserted into the sliding pins 37a and 37b between the push plate 40 and the cutter mounting plate 32. Accordingly, the pressing plate metal 38 is held by the cutter mounting plate 32 so as to be able to advance and retreat in a direction parallel to the axial center line 34i, and the pressing plate 40 is always attached to the cutter mounting plate by the spring 42. It is urged in a direction away from 32 (reverse direction).

  The guide groove 39 is an arc groove extending in an arc shape with the shaft center line 34i as a center, and of the first and second slide pins 37a and 37b, the slide pin closer to the shaft center line 34i. In this example, the first sliding pin 37a is guided. Further, at both ends of the guide groove 39, fitting recesses 39a and 39b in which the heads 41a of the first sliding pins 37a are fitted are formed.

  In this example, when the cutter 14 is in the cutting posture Y1, as shown in FIG. 10 (A), the head 41a of the push plate fitting 38 fits into the fitting recess 39a. Thereby, the rotatable cutter 14 can be stopped and fixed in the cutting posture Y1. Also, as shown in FIG. 10B, the head 41a is detached from the fitting recess 39a and fixed by pushing the push plate 40 toward the cutter mounting plate 32 and moving the push plate fitting 38 forward. Canceled. Thereby, the cutter 14 can be swung toward the non-cutting posture Y2. When the cutter 14 reaches the non-cutting posture Y2, as shown in FIG. 10A, the head 41a fits into the fitting recess 39 by the biasing force of the spring 42, and stops in the non-cutting posture Y2. Can be fixed.

  Thus, when the said attitude | position change means 33 is provided in the cutter holder 15, the cutter 14 can be made to wait in the non-cutting attitude | position Y2 previously. Therefore, each cutter 14 preset at the reference position J can be readjusted to an accurate position according to, for example, the identification mark of the ply material S, and then the posture can be changed to the cutting posture Y1 to start cutting. Adjustment work becomes easy, and operability can be improved. Further, for example, by setting some of the plurality of cutters 14 to the non-cutting posture Y2, the number of divisions of the ply material S can be adjusted without removing the cutting tool 8 itself.

The alignment means 9 of the second embodiment has substantially the same configuration as that of the first embodiment. As shown in FIGS. 9 and 10, the width direction X from the cutter holder 15, in this example, the holder base 31. Includes a positioning convex portion 20 projecting in a right angle direction (upward in this example) and an alignment body 21 capable of moving forward and backward toward the positioning convex portion 20. The positioning convex portion 20 has a tapered portion 20A having a tapered shape at a tip portion thereof. The alignment body 21 can be moved back and forth toward the positioning convex portion 20 by the cylinder 22 supported by the support bar 11.
A positioning recess 24 is formed at the front end of the alignment body 21 so that the cutting tool 8 can be aligned with the reference position J by fitting with the tapered portion 20A by advancing. On both sides of the positioning recess 24 in the width direction X, there are provided gently inclined guide surfaces 25 that contact the displaced positioning projection 20 and guide the positioning projection 20 to the positioning recess 24.

  Although the particularly preferred embodiment of the present invention has been described in detail above, the ply material cutting device of the present invention is limited to the illustrated embodiment such that it can be used for cutting a ply material not formed with an identification mark. Without modification, the present invention can be implemented in various forms.

3, 30 Ply material cutting device 6 Cutting means 7 Guide rail 8 Cutting tool 9 Positioning means 14 Cutter 15 Cutter holder 20 Positioning convex part 20A Taper part 21 Positioning body 22 Cylinder 22a Rod 24 Positioning concave part 24A Guide surface 33 Posture changing means 34i Axis axis A1 Tire code A Array B Topping rubber J Reference position P, P1, P2 Strip ply S Ply material X Width direction Y1 Cutting posture Y1
Y2 Non-cutting posture Y2

Claims (5)

A ply that forms a narrow belt-like ply by cutting a wide ply material in which an array of organic fiber tire cords aligned in parallel with a topping rubber is cut by a cutting means and divided into multiple pieces in the width direction. A material cutting device,
The cutting means is a guide rail extending in the width direction,
The cutter holder is guided by the guide rail and can freely move in the width direction, and a cutter attached to the cutter holder. The cutter holder can freely move in the width direction so that the tire cords can be moved between the tire cords without being cut. Cutting tool capable of cutting topping rubber,
And prior to the cutting, comprising a positioning means for positioning the cutting tool to a reference position in the width direction,
The positioning means protrudes in a direction perpendicular to the width direction from the cutter holder, and a positioning convex portion having a tapered portion at a tip thereof,
It can be moved forward and backward toward the positioning convex part, and can be fitted to the taper portion by moving forward to align the cutting tool with a reference position, and it can be freely moved in the width direction by opening the cutting tool by retreating. A ply material cutting device comprising: an alignment body provided with a positioning recess to be provided at a front end.   The alignment body has guide surfaces that guide the positioning convex portion to the positioning concave portion on both sides in the width direction of the positioning concave portion by inclining backward toward the positioning concave portion. The ply material cutting device according to claim 1.   The ply material cutting device according to claim 1 or 2, wherein the alignment body is attached to a rod of a cylinder and can move forward and backward toward the positioning convex portion by expansion and contraction of the rod.   The cutter holder has posture changing means capable of changing the posture of the cutter into a cutting posture capable of cutting the ply material by contacting the ply material and a non-cutting posture separated from the ply material and not cutting the ply material. The ply material cutting device according to any one of claims 1 to 3, further comprising:   5. The posture changing means holds the cutter so as to be turnable about an axis parallel to the width direction, and moves between the cutting posture and the non-cutting posture by the turning. Description Ply material cutting device.

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