JP2001030372A - Method for removing joints of belt material and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically remove a strip piece of standard length having a joint generated during connecting constituent strip materials of a belt material from a splice position by automatically detecting the strip piece. SOLUTION: This device comprises a standard length cutting device 6 which biasedly cuts strip materials S formed continuously, a transport conveyor 7 which conveys the strip pieces S' cut to the standard length in a direction crossing a direction where the strip material S is conveyed, a splice device 8 which is arranged on the transport conveyor 7 and splices the strip pieces S' intermittently moved by the transport conveyor 7 and at the same time, sequentially aligned, a joint detecting sensor 5a which detects the strip piece S' of standard length having a joint before cutting it to the standard length and a joint removing device which identifies the strip piece S' of standard length having a joint by a signal from the joint detecting sensor 5a and removes such a strip piece S' from a splice position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing a seam of a belt material, and more particularly, it occurs when a start end of a new strip material is joined to an end portion of the previous strip material. The present invention relates to a method and an apparatus for removing a seam of a belt material for surely removing a strip piece having a seam from a splice position.

[0002]

2. Description of the Related Art Conventionally, as a method of forming a belt layer of a pneumatic radial tire, a plurality of reinforcing cords arranged in a line are impregnated with unvulcanized rubber to form a narrow and long strip material. The strip material is once wound into a cell and stocked.

At the time of forming the belt layer, the strip material is pulled out from the cell, cut into a predetermined angle and a predetermined length to form a strip piece, and the strip piece is inclined at a predetermined angle with respect to the tire circumferential direction. Let me
It is known that an integral number of sheets are joined to each other so that both sides thereof abut each other so as to make one circumference of the tire (Japanese Patent Application Laid-Open No. HEI 1-1990).
1-99564).

[0004]

By the way, in forming a belt layer in the case of continuously manufacturing tires, a continuous strip material is connected by connecting a new strip material start end portion to a previous strip material end portion. Use as In this case, a joint portion always occurs at a connection portion between the end portion of the strip material and the start end portion of the new strip material. Since the reinforcing cord is cut in the middle of the belt material having such a joint portion, a variation occurs in strength, and therefore, it is necessary to remove the strip material having the joint portion at the time of forming a tire.

Further, if the above-mentioned strip material is cut to a fixed size and used, a strip piece having a joint portion is mixed into a part of the belt layer. When a belt member for one tire containing is manufactured, it is extremely difficult to remove it during belt molding.
Especially in the case of automatic belt molding, it is almost impossible.

Furthermore, if a belt member for one tire having a joint portion is erroneously manufactured, the belt material for one tire is made defective, which is extremely uneconomical. there were.

It is an object of the present invention to provide a method of manufacturing a belt material for one tire, wherein a fixed-size strip piece having a seam generated at the time of connecting strip materials constituting the belt material is formed.
An object of the present invention is to provide a method and an apparatus for removing a seam of a belt material, which are automatically detected and automatically removed from a splice position.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for removing a seam of a belt material according to the present invention.
A seam portion generated at the time of connecting the terminal of the strip material is detected by a seam detection sensor before cutting the fixed length, and the fixed length strip piece having the seam is spliced before splicing by a signal from the seam detection sensor. The gist is to remove with an eye removing device.

In addition, the present invention provides a belt material joint removing apparatus which cuts a continuously formed strip material with a bias, and a device for cutting the strip material cut in a fixed length into a direction in which the strip material is conveyed. A transport conveyor that transports in a crossing direction, a splicing device that is disposed on the transport conveyor, and that sequentially aligns and splices the strip pieces while intermittently moving the transport conveyor, and a fixed-size strip piece that has a seam. A seam detection sensor that detects before cutting a fixed length, and a seam removal device that grips a fixed length strip piece that has a seam according to a signal from the seam detection sensor and removes the strip from the splice position. It is the gist.

The present invention is constructed as described above, and in the process of manufacturing a belt member for one tire, a strip piece having a seam generated at the time of connection of the strip material constituting the belt material is replaced with the strip piece. By automatically removing from the vicinity of the splice position without manual intervention, the seamed strip piece is not supplied to the tire forming machine side, and the belt material for one tire is regarded as defective. Without this, a high-quality tire can be efficiently manufactured.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 1 is a schematic plan view of a first embodiment of an edge removing device for carrying out the method for removing an edge of a belt material according to the present invention. In FIG. 1, reference numeral 1 denotes a plurality of steel cords. A creel stand that supplies the reinforcing cord f,
Reference numeral 2 denotes a rubber coating device for forming a strip material S by coating the reinforcing cord f with a rubber, and 3 denotes a drawing device for drawing the strip material S. The drawing device 3 has a long shape (for example, 500 m to 1000 m) drawn by the drawing device 3. The strip material S is once wound around the cell 3a and stocked.

At the time of forming the belt material, the stocked cells 3a are transferred to the unwinding device side, and the cells 3a are removed.
The strip material S is unwound from a and temporarily stays in the festooner 4. 5 is a fixed length feeding device for intermittently transferring the strip material S, 5a is a joint detection sensor for detecting a fixed length strip piece before cutting, and 6 is cutting the strip material S to a fixed size and fixed angle. This is a fixed-size cutting device, and these devices are arranged substantially in series.

In the direction intersecting with each of the above-mentioned devices (in this embodiment, the direction orthogonal to the direction), a transport conveyor 7 which can receive a large number of strips S 'cut to a fixed size and which can be rotated forward or backward is provided. An alignment splicing device 8 is provided on the conveyor 7 for splicing and joining the longitudinal side edges of the transported and aligned strip pieces S ′. A belt forming drum 10 for supplying a belt material B corresponding to one tire via an intermediate conveyor 9 is provided on the carry-out side of the transport conveyor 7.

The creel stand 1 includes a reinforcing cord f
And a rubber coating device 2 pulls a plurality of reinforcing cords f pulled out from the creel stand 1 in parallel at a constant pitch, and removes unvulcanized rubber therefrom. Extruded and covered with rubber,
A strip material S of a constant width having a parallelogram cross section and a tapered surface at both ends in the width direction is continuously formed. The width H of the strip material S is 5-6.
0 mm, preferably 10 to 30 mm.

The pulling device 3 connected to the coating device 2 continuously draws out the reinforcing cord f from the creel stand 1 and forms the strip material S with the rubber coating device 2 so as to continuously move in the direction of arrow X. And pull it out.

The strip material S drawn from the drawing device 3 is wound around the cell 3a and temporarily stocked as described above.

The cell 3a on which the strip material S has been wound
Is set on the unwinding device side, and the unwinding device is connected to the festival 2. The festooner 4 is installed to absorb the speed difference between the continuous drawing speed of the drawing device 3 and the intermittent feeding speed of the fixed-size feeding device 5. Space 4 formed between rollers 4a and 4b that is driven and controlled on the basis of
The strip material S is suspended in a loop shape in a state c.

A fixed-length feeder 5 is connected to the festooner 4 via a free roller conveyor, and the fixed-length feeder 5 intermittently conveys the strip material S at a fixed length according to the belt width. It is supposed to.

Further, the fixed-size feeding device 5 is configured to be pivotable to both sides as shown by an arrow Y about a position O on a cutting line 6a on the cutting device 6 side. The angle to be supplied with respect to the low angle α or the high angle β can be adjusted.

The cutting device 6 sequentially converts the strip material S, which has been conveyed to the conveyor 7 by the fixed length feeding device 5 at regular intervals, into strip pieces S 'at a predetermined cutting angle θ with respect to the conveying direction. It is designed to be cut to fixed size. The strip material S is cut into fixed lengths parallel to the transport direction of the conveyor 7.

The transport conveyor 7 intermittently transports the belt material B alternately and intermittently at regular intervals toward the belt forming drum 10 in synchronization with the fixed-length feeder 5. Is configured.

As shown in FIG. 2, the aligning and splicing device 8 is arranged along a supply path for feeding the strip material S to the transport conveyor 7 in the transverse direction thereof.
A first guide 11 having a bottom plate 11a for supporting the trailing edge side and a side plate 11b for regulating the position of the trailing edge side;
And a second guide 12 having a side plate 12a for regulating the position on the front edge side of the second guide 12.

The first guide 11 includes a support frame 14
A slide plate 19 is mounted on the lower surface of the cylinder via a guide member 14a provided with a driving means, and a cylinder 15 is mounted on a support plate 19a suspended from the slide plate 19.
(For example, a rodless cylinder) is mounted horizontally. An L-shaped first guide 11 having a side plate 11b provided with the bottom plate 11a is attached to the tip of a rod 15a of the cylinder 15.
The second guide 12 can be moved up and down by the operation of an elevating cylinder 16 attached to the support frame 14 by the operation of.

On the supporting frame 14, the first
A removing cylinder 20 is attached to drop the strip pieces Sa and Sb having the joint Sab supported on the guide 11 to the outside at a position retracted from the splice.

In the embodiment of the present invention, the first guide 11, the slide plate 19 which slides via the guide member 14a provided with the driving means, and the removal cylinder 2 are provided.
0 is a main component of the joint removing device 21 for the strip pieces Sa and Sb.

Between the first guide 11 and the second guide 12, there is arranged a splice press 13 for press-fitting the strip pieces S '. The splice press 13 includes a cylinder 1 mounted on a support frame 14.
By the operation of 7, it moves up and down along the side plate 12 a of the second guide 12. 18 is a conveyor belt 7a
It is a press cradle installed inside.

The support frame 14 is provided with
Is swiveled to change the cutting angle θ of the fixed-size cutting device 6, the position O on the cutting line 6 a on the fixed-size cutting device 6 side is changed.
And the first and second guides 11 and 12 and a splice press 1
The extending direction of 3 and the feeding direction of the fixed-size feeding device 5 always match.

Next, a first embodiment of a method for removing the strip pieces Sa and Sb containing the joint Sab generated when the strip material S constituting the belt material B is connected will be described with reference to FIGS. This will be described with reference to FIGS.

The seam Sab generated when the strip material S is connected always occurs when the belt material B is continuously manufactured, and the strip pieces Sa and Sb including such a seam Sab are used in the tire. Since it adversely affects the quality, it is necessary to reliably remove the belt material B in the molding.

Therefore, in the first embodiment of the present invention, the joint Sab generated at the time of connection of the strip material S, that is, at the time of connection between the rear end portion of the previous strip material S and the front end of the new strip material S. Is detected by a seam detection sensor 5a provided near the standard length feeding device 5 in the pre-cutting step, and the seam removal device 2 is detected from the seam detection sensor 5a.
A signal is output to 1 and the strip removing device 21 cuts the strip pieces Sa and Sb mixed with the seam portion Sab by the fixed length cutting device 6 (see FIG. 6A).

Thereafter, as shown in FIGS. 3 and 6 (b), the slide plate 19 provided with the first guide 11 holding the strip pieces Sa and Sb containing the joint Sab.
Is retracted rightward in FIG. 3 (in the direction opposite to the transport direction of the strip material S) or downward in FIG. 6B by a guide member 14a provided with a driving means provided on the lower surface of the support frame 14, and the joint Sab is formed. The tip of the strip pieces Sa and Sb containing the mark is positioned below the removing cylinder 20.

Thereafter, the tip of the strip pieces Sa and Sb placed on the bottom plate 11a of the first guide 11 is pressed downward by extending the removing cylinder 20 to extend it, as shown in FIG. Then, the strip pieces Sa and Sb containing the joint Sab are removed from the transport line of the strip material S (see FIG. 6C).

Further, the slide plate 19 provided with the first guide 11 is moved again to the original standby position as shown in FIGS. 5 and 6 (d), and as shown in FIGS. 6 (e) and 6 (f). The guiding of the strip material S supplied until the seam detection sensor 5a detects the strip pieces Sa and Sb containing the seam portion Sab.

Next, FIGS. 7A to 7D show a method of removing the strip pieces Sa and Sb containing the joint portions Sab generated when the strip material S is connected by the joint removing device 21a. Of the second embodiment is shown.

In the second embodiment, a thickness detecting sensor 20 for detecting strip pieces Sa and Sb containing a joint Sab, a gripping means 22 which moves forward and backward along the alignment splicing device 8, and a gripping means And an operating cylinder 23 that slides 22.

When the thickness detecting sensor 20 detects the strip pieces Sa and Sb containing the joint Sab, the strip pieces Sa and Sb containing the joint Sab remaining near the splice position of the strip material S. Is gripped from above and below by the gripping means 22, and the operating cylinder 23 is further operated to connect the joint Sa through the gripping means 22.
b, and transports the strip pieces Sa and Sb in the linear direction opposite to the supply direction of the strip material S, thereby conveying the strip pieces Sa and Sb.
It is to be removed from above. Thereafter, the joint removing device 21a waits at the standby position until the thickness detection sensor 20 detects the strip pieces Sa and Sb containing the joint Sab.

[0038]

As described above, according to the present invention, a fixed-length strip piece having a seam generated when a strip material constituting a belt material is connected is reliably and automatically removed from a splice position. In order to prevent mixing of the fixed-size strip pieces with seams when feeding the belt material,
In addition, the belt material for one tire is economically advantageous without a defective product, and there is an effect that the productivity of the tire can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a first embodiment of an edge removing device for performing an edge removing method of a belt member according to the present invention.

FIG. 2 is a schematic sectional view of the strip splicing device and the seam removing device of FIG. 1;

FIG. 3 is an operation explanatory view of a seam removing device that retreats a strip piece including a seam portion;

FIG. 4 is an operation explanatory view of a joint removing device for removing a strip piece having a joint from a strip material conveying line.

FIG. 5 is an operation explanatory view in a state where the joint removing device returns to the original standby position.

FIGS. 6 (a) to 6 (f) are explanatory views of the operation of the first embodiment of the method for removing an edge of a belt member according to the present invention.

FIGS. 7 (a) to 7 (d) are operation explanatory diagrams of a second embodiment of the method for removing an end piece of a belt member according to the present invention.

[Explanation of symbols]

 Reference Signs List 6 Standard-size cutting device 7 Conveyor 8 Aligning splicing device 10 Belt forming drum 19 Slide plate 20 Removal cylinder 21 Joint removing device S Strip material S 'Strip piece Sab Joint portion B Belt material

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F212 AH20 AP20 AR20 VA11 VA12 VD07 VD19 VL01 VL06 VL25 VM05 VP17 VP20 VP29 VQ01 VQ07

Claims (2)

[Claims] 1. A belt material for forming a belt-shaped belt material by cutting a continuous strip material into fixed lengths, sequentially aligning and splicing the strip pieces while intermittently moving in a direction intersecting with the transport direction of the strip material. In the manufacturing method, a seam portion generated at the time of terminal connection of the strip material,
A method for removing a seam of a belt material, which is detected by a seam detection sensor before cutting a fixed length, and a strip strip having the seam is removed by a seam removing device before splicing according to a signal from the seam detection sensor. . 2. A constant-length cutting device for cutting a continuously formed strip material into a bias, a transport conveyor for transporting the fixed-size strip pieces in a direction intersecting with a transport direction of the strip material, and the transport Placed on a conveyor,
In a belt material manufacturing apparatus including a splicing device that sequentially aligns and splices strip pieces while intermittently moving them by a conveyor, a seam detection sensor for detecting seam-length strip pieces before cutting the seam is provided. Gripping a fixed-length strip piece with a seam by a signal from the seam detection sensor,
A seam removing device for removing the seam from the splice position.