JP2006001023A - Detector for detecting twist flaw part of twisted steel cord and rubber lining and rolling apparatus of twisted steel cord - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detector for detecting the twist flaw part of a twisted steel cord in a topping process before performing topping, and a rubber lining and rolling apparatus of the twisted steel cord provided with the detector for detecting the twist flaw part of the twisted steel cord. <P>SOLUTION: The rubber lining and rolling apparatus of the twisted steel cord has a plurality of groove parts for passing a plurality of the steel cords drawn out of reels to travel and a cord sensing sensor part for sensing the twisted steel cord extending in the direction crossing the cord traveling direction with respect to the whole of a plurality of the steel cords and floating from the groove parts and a twist flaw part detecting mechanism comprising a plurality of the groove parts and the cord sensing sensor part is provided over the whole of a rolling width direction before or during the arrangement of a plurality of the steel cords drawn out of the reels. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a twist defect detection device for a twisted steel cord and a rubber rolling device for twisted steel cord.

  More specifically, a twisted defect detection device for a twisted steel cord and a rubber-drawing rolling device for a twisted steel cord used when manufacturing a rubberized twisted steel cord sheet used for manufacturing a tire or various types of rubber reinforcement. It is about.

  Conventionally, it has been known that rubber-twisted steel cord sheets obtained by topping rubber on a large number of aligned twisted steel cords and rolling them by calendering etc. are used for reinforcing applications such as radial tires. Yes.

  In order to manufacture such a rubber-twisted steel cord sheet, generally, means such as topping rubber on a plurality of twisted steel cords arranged in a sheet shape and passing the calender roll are taken.

  Normally, each stranded steel cord is composed of a plurality of steel wires, and the steel cords are twisted so that the plurality of steel wires are not separated. This is because if a loose state occurs and the rubber is processed in that state, the reinforcing effect using the steel cord cannot be sufficiently exhibited in that portion.

  It is conceivable to add as many twists as possible in order to prevent the cords consisting of multiple steel wires from breaking as much as possible. However, setting a large number of twists increases the production cost and also controls production. In terms of performance as a rubber-twisted steel cord, increasing the number of twists prevents the rubber from entering the gap between the steel wires. From this point, there is a situation where the number of twists at a certain level is unavoidable.

  On the other hand, the twisted steel cord includes a two-layer structure of a core steel wire and a sheath steel wire, or a structure that should be called a multi-layer core-sheath structure or a cored structure having three or more layers.

  For example, a twisted steel having a two-layer structure in which three steel wires 2 as shown in the schematic cross-sectional model diagram of FIG. 1 are located at the core and eight steel wires 3 form a sheath so as to surround the steel wires 2. In the twisted steel cord having such a multi-layer cored structure, the steel wire is not arranged in the cross-sectional structure and the steel wires are not arranged. If there is a gap between the steel wires and the twisted state of the twisted steel cord is uneven, there is an incomplete part, etc. There was an inconvenience of jumping out.

  And, when such a core steel wire is protruded and rubberized, the part becomes a defective part, and when used in a final product such as a tire, the tire durability is remarkably reduced. As a result, there is a problem that the rubber-drawn twisted steel cord becomes a defective product.

  In order to prevent such inconvenience, it is effective not to produce a rubberized twisted steel cord using a twisted steel cord having a twisted defect. Usually, however, the twisted defect portion of the twisted steel cord is It is only a small part when viewed from the whole in the length direction, and the twisted steel cord itself is wound around a reel, so that the existence of the twist defect is known in advance. It ’s difficult.

  Therefore, in the past, after pulling the steel cord from a creel stand with a large number of reels for processing by a rubber rolling mill, before the rubber topping, the operator visually or The presence of a defective part was checked by touching with a hand.

  However, in such a check that only relies on the visual and tactile sensation of the worker, the number of steel cords to be checked is very large. It was difficult.

  Conventionally, as a method for performing such a check mechanically, for example, as a method for detecting the exposed state of the cord in the coated cord material, the light reflected by the coated cord material is incident on the color sensor and the color sensor is used. It has been proposed that detection is performed by determining whether or not a color peculiar to the exposure code is present in the color detected in (Patent Document 1).

  However, in the proposal of Patent Document 1, it is necessary to grasp in advance the color peculiar to the exposure code. If this proposal is applied to a steel cord as a target in the present invention, it is located in the inner layer. It is necessary to change the color of the steel wire and the steel wire located in the outer layer, and it is necessary to change the production conditions going back to the steel cord production factory as the previous process, which is not preferable in various points. In addition, according to the study by the present inventors, in order to increase the detection accuracy of the twist defect itself, it is impossible to predict where the exposed steel will come out. Observing the peripheral surface itself was difficult and difficult to adopt.

  In addition, in two-layer or three-layer steel cords having an outer layer steel wire (sheath steel wire) and an inner layer steel wire (core steel wire), especially by improving the shape stability of the outer layer steel wire, In order to achieve uniform rubber intrusion, uniform the entire steel cord by keeping the relationship between the circumscribed circle diameter of the inner steel wire group (core part) and the individual diameter of the outer steel wire constant (Patent Document 2).

  However, this proposal attempts to optimize the overall shape of the steel cord and the structure of each steel wire of the inner layer and the outer layer by relating them in terms of dimensions. However, no consideration was given to the occurrence of a twist defect portion locally generated.

  Moreover, when each steel cord is passed through a compression device having a through hole and pulled out, when the cord has a twisted steel wire, the twisted steel wire is It has been proposed that the stability of twisting of the steel cord is inspected by observing the protruding state because it cannot be passed at the entrance of the compression device and jumps out excessively (Patent Document 3).

However, this proposal gives excessive physical force to be applied to steel cords that are actually in the process of producing rubberized steel cords, and in some cases twisted steel that was not twisted. This method may cause twisting disturbance to the cord and is difficult to adopt.
JP-A-3-269247 Japanese Patent Laid-Open No. 5-179584 JP 7-128220 A

  In view of the above-described points, the present invention provides a process line in which a twisted steel cord having a twist defect portion is processed in a process in which a large number of twisted steel cords are aligned and processed into a rubber-drawn rolled steel cord. The present invention provides an apparatus for detecting a twisted defect portion of a twisted steel cord that can be reliably detected with a simple device configuration before performing rubber topping, and further, twisting of the twisted steel cord. An object of the present invention is to provide a rubber drawing and rolling device for a twisted steel cord provided with a defect detection device.

The twisted defect detection device for a twisted steel cord of the present invention that achieves the above-mentioned object has the following configuration (1).
(1) A plurality of groove portions through which a plurality of twisted steel cords that are pulled out from the reel and pass through and extending in a direction intersecting with the cord traveling direction corresponding to all of the plurality of twisted steel cords and A twisted defect detection device for a twisted steel cord, comprising a cord detection sensor portion that senses a twisted steel cord that protrudes from a groove.

In addition, in the twisted defect detection device for a twisted steel cord of the present invention, the following specific configurations (2) to (8) are preferable as specific embodiments.
(2) maximum opening width W is twisted steel cord intended maximum diameter D _max and substantially equal to the groove, with 65% or less than 45% of the intended maximum diameter D _max of the steel cord twist groove depth H The twisted defect detection device for a twisted steel cord according to the above (1), characterized in that it exists.
(3) The twist detection unit for a twisted steel cord according to (2) above, wherein the cord detection sensor unit includes a pressure-sensitive or energized contact type sensor.
(4) The twisted defect detection device for a twisted steel cord according to (3) above, wherein the cord detection sensor unit includes a photoelectric tube type non-contact type sensor.
(5) The above-mentioned (4), wherein the cord detection sensor unit includes a plurality of cord detection sensor units that are provided by dividing a plurality of twisted steel cords into a plurality of groups and corresponding to each group. A twist defect detection device for the described twisted steel cord.
(6) A dancer roll is provided in the upstream portion and / or the downstream portion of the cord detection sensor unit, which contacts the running stranded steel cord and prevents the running stranded steel cord from swinging toward the cord detection sensor. A twist defect detection device for a twisted steel cord according to the above (1), (2), (3), (4) or (5).
(7) The above (1), (2), (3), (4), (5) or (6), wherein the plurality of grooves are provided on the circumferential surface of the rotating roller. ) Twist defect detection device for twisted steel cord as described.
(8) The above-mentioned (1), (2), (3), (4), wherein the twisted steel cord is a cord having a core-sheath multilayer structure comprising a core steel wire portion and a sheath steel wire portion , (5), (6) or (7) The twist defect detection device for a twisted steel cord.

In addition, the rubber drawing and rolling apparatus for twisted steel cord of the present invention that achieves the above-mentioned object has the following configuration (9).
(9) In a rubber drawing rolling apparatus that pulls out twisted steel cords from a plurality of reels, aligns the plurality of twisted steel cords using an alignment roll, and performs a rubber topping process, the plurality of strands drawn out from the reels Before or during the alignment of the stranded steel cords, a plurality of groove portions through which a plurality of stranded steel cords drawn and run from the reel are passed over the entire rolling width direction, and all of the plurality of stranded steel cords Correspondingly, a rubber rolling apparatus for twisted steel cords is provided, which is provided with a detection mechanism for twisted defect portions comprising cord detection sensor portions for sensing the twisted steel cords raised from the groove portions.

In addition, the rubber drawing and rolling apparatus for twisted steel cords according to the present invention has the following configuration (10) as a preferred specific embodiment.
(10) The twisted steel cord according to (9), wherein the twisted steel cord detection device for twisted steel cord according to any one of (1) to (8) is provided as a detection mechanism for the twisted defect portion. Rubberized rolling equipment to.

  According to the first aspect of the present invention, during the process of aligning and running a large number of twisted steel cords to process a rubber-drawn rolled steel cord, the twisted steel cord having a twist defect portion is used as a processing line. When advanced, the present invention provides a device for detecting a twisted defect portion of a twisted steel cord that can reliably detect the rubber topping before performing the rubber topping with a simple device configuration.

  According to the present invention of claim 9, a high-quality rubber-twisted steel cord can be produced stably by providing a device that reliably detects twist defects in the twisted steel cord with a simple device configuration. There is provided a rubber drawing and rolling device that makes it possible.

  Hereinafter, the present invention will be described in more detail with reference to the drawings.

  A twist defect detection device for a twisted steel cord according to the present invention includes a plurality of groove portions through which a plurality of twisted steel cords that are drawn out of a reel and run and cords corresponding to all of the plurality of twisted steel cords. It has a cord detection sensor portion that extends in a direction intersecting with the running direction and senses a twisted steel cord raised from the groove portion.

  FIG. 2 is a schematic diagram schematically showing the configuration of the twisted defect detection device 4 for a twisted steel cord according to the present invention. The number of cords corresponding to the number of twisted steel cords that are drawn out from a reel and run are shown. A groove portion 5 to be passed is provided, and a cord detection sensor portion 6 that senses a twisted steel cord is provided on the opposite side across the traveling cord.

  In such a configuration, a twisted steel cord that is in a normal twisted state and has a twisted structure as designed by the twisted steel cord has almost no change in diameter in the length direction of the cord. When the dimension of the groove portion 5 is appropriately determined according to the dimension of the twisted steel cord 1, about one half of the portion of the twisted steel cord 1 is orderly arranged inside the groove portion 5. It can be held down.

  This state is shown in a schematic model diagram in FIG. 3A, and in this state, the code detection sensor unit 6 does not operate. FIG. 3B shows that a twist defect exists in the portion of the twisted steel cord 1 ′, and the twisted steel cord 1 ′ jumps out of the groove 5 due to the presence of the twist defective portion, and the cord detection sensor unit 6 It is a schematic cross-sectional model figure explaining a state when it contacts. At this time, the cord detection sensor unit 6 is activated by contact with the twisted defect portion, and by this operation, necessary measures such as stopping of the processing apparatus or activation of an alarm sound or an alarm lamp can be performed.

  That is, in the present invention, the twist detection portion of the stranded steel cord is not twisted, so that the bundle of steel wires cannot be converged, the cord diameter increases, and the cord detection jumps out of the groove portion. The sensor unit 6 senses the pop-out mechanically and electrically.

Therefore, it is important that the groove portion 5 is determined within an appropriate range in terms of shape and dimensions so that the above-described protrusion is reliably performed when a twist defect portion of the twisted steel cord arrives. According to knowledge, the shape is substantially semicircular, and the maximum opening width W in the groove 5 shown in FIG. 2 is substantially equal to the intended maximum diameter D _max of the twisted steel cord. The groove depth H is preferably 45% or more and 65% or less of the intended maximum diameter _Dmax of the twisted steel cord.

Here, the desired maximum diameter D _max of the twisted steel cord is obtained by measuring the diameters of five portions where the twist of the twisted steel cord is considered normal with a micrometer and calculating the average.

  The code detection sensor unit 6 extends in a direction intersecting with the running direction of the cord, and operates so as to correspond to the entire width of the cord group so that the presence of a defective portion in all cords can be detected. Is provided.

  The cord detection sensor unit 6 is not limited in its mechanism as long as it can reliably detect that the twist defect part has jumped out of the groove part, but it is a pressure-sensitive or energized contact type that operates in contact with the twist defect part. A sensor or a non-contact sensor of a photoelectric tube type that senses a protruding twist defect portion with light or the like can be used.

  Further, as shown in FIG. 2 and FIG. 3, the cord detection sensor unit 6 is preferably provided by dividing all the twisted steel cords into a plurality of groups and corresponding to each group. If constituted in this way, it will be possible to quickly confirm in which twisted steel cord where a twist failure has occurred, so that the treatment after the discovery of a twist failure can be performed quickly and more appropriately. Become.

  The plurality of groove portions 6 are configured to be provided on the entire circumferential surface of the rotating roller, so that the stable traveling of the traveling steel cord group is hardly hindered, and the active guide Since the role can also be fulfilled, it is preferable. The rotating roller may be free rotating or positive rotating. However, when it is desired to function a steel cord group having a relatively heavy weight while serving as a support guide, it is preferable to use a positive rotating roller.

  Also, a dancer roll may be provided in the upstream portion and / or the downstream portion of the cord detection sensor unit 6 so as to contact the traveling stranded steel cord and prevent the traveling stranded steel cord from swinging in the direction of the cord detection sensor. preferable. With such an apparatus configuration, it is possible to prevent blurring based on the running of the twisted steel cord, to prevent occurrence of erroneous detection, and to more accurately detect a twisted portion.

  The above-described twist defect detecting device for a twisted steel cord of the present invention can be incorporated in a rubber-drawing rolling device or the like for a twisted steel cord and used for rubberizing a twisted steel cord.

  Generally, in a rubber drawing rolling apparatus that pulls out twisted steel cords from a plurality of reels, aligns the plurality of twisted steel cords using an alignment roll, and performs a rubber topping process, the plurality of strands drawn out from the reels. It is effective to provide a twist defect detection device before or during the alignment of the stranded steel cords of the book, and to perform the detection before the actual rubber topping.

  Accordingly, the rubber drawing and rolling apparatus for twisted steel cords of the present invention runs while being drawn out from the reel over the entire rolling width direction before or during alignment of the plurality of twisted steel cords drawn out from the reel. A detection mechanism for a twisted defect portion comprising a plurality of groove portions through which a plurality of twisted steel cords pass and a cord detection sensor portion for sensing the twisted steel cords raised from the groove portions corresponding to all of the plurality of twisted steel cords. Is provided.

  Such a configuration is shown in FIG. 4, in which a plurality of stranded steel cords 1 drawn out from a reel 7 hung on a creel stand are formed of a stranded steel cord comprising a grooved roll 8 and a cord detection sensor unit 6. It is guided to the twist defect detection device 4.

  A dancer roll 9 is provided upstream and / or downstream of the twisted steel cord twist detection unit 4 to prevent the traveling twisted steel cord 1 from swinging toward the cord detection sensor unit 6.

  The twisted steel cord coming out of the twisted steel cord twist detection unit 4 is guided to the calender roll group 11 and subjected to processing necessary for rubber drawing such as rubber topping and calendering, and is wound up. An alignment roll 12 is arranged in front of the calendar roll group so that the twisted steel cords are aligned at a predetermined interval and guided to the calendar roll group.

  In the twisted defect detection device 4 of the twisted steel cord, when the cord detection sensor unit 6 is activated, the device stop device 10 is activated to stop the prime mover (not shown) of the entire device to stop processing. In addition, the cord detection sensor unit 6 can be configured to take necessary measures such as activation of an alarm lamp corresponding to the detected position of the poorly twisted steel cord. After the apparatus is stopped and rubber topping and rubber pulling are stopped, the twisted portion of the cord is removed, and the processing can be resumed by taking necessary measures such as rearranging the cord.

  Hereinafter, the present invention will be specifically described by way of examples.

Example 1
500 twisted steel cords (3 + 8 × 0.215) with a cored two-layer structure having a schematic structure as shown in FIG. 1 (100 m in length) are prepared. A twist defect was intentionally provided at a random position.

  The 500 stranded steel cords were wound on 500 reels and subjected to a twist defect detection test.

In Example 1, it carried out using the detection mechanism used as the combination of the grooved roll concerning this invention, and a pressure sensor. The maximum opening width W in the groove was 0.92 mm, and the groove depth H was 0.46 mm.
The expected maximum diameter D _max of the twisted steel cord was 0.90 mm.

  The evaluation was carried out in terms of two points of detection rate (%) of defective parts and workability (time). As for workability, the twisted steel cord was pulled out from the set reel, and the time required to set all the pieces up to the calendar roll through various guides and detection devices was measured. The measurement results were displayed as an index with the time taken for Comparative Example 1 described later as 100. The larger this value, the worse the workability.

  The results are as shown in Table 1. The detection rate was as high as 100%, and the workability was excellent although it was slightly inferior to Comparative Example 1 in which the detection of a defective portion described later was performed by the operator's eyes and palpation. .

Example 2
Except for setting the groove depth H to 0.32 mm, it was subjected to a detection test for a twisted defect under the same conditions as in Example 1.
The results are as shown in Table 1. The detection rate was 96%, which was inferior to that of Example 1, but was excellent in workability.

Comparative Example 1
It was subjected to a twist defect detection test by the operator's eyes and palpation.
The results are as shown in Table 1, and the detection rate was as low as 10%.

Comparative Example 2
A gate type cord diameter detection system was used for a test for detecting a twist defect.
The results are as shown in Table 1. The detection rate was 98%, which was an intermediate value between Example 1 and Example 2, but the workability was inferior by 2.5 times.

Comparative Example 3
The eddy current flaw detection method was used to detect a twist defect.
The results are as shown in Table 1. The detection rate was 80%, which was considerably lower than those in Examples 1 and 2, and the workability was inferior at 2.5 times.

  The apparatus according to the present invention can be widely used in rubber reinforcement application industries in the field of rubber drawing and rolling into twisted steel cords.

  Typically, it can be used in the tire industry, but is not limited to the tire field, and can also be used in the industrial field using other rubber belts, rubber sheets, and the like.

FIG. 1 is a schematic cross-sectional model diagram showing a structural example of a twisted steel cord as a model. In particular, it is shown as an example of a steel cord having a multi-layered core structure that can be expected to have a great effect when applied to the apparatus of the present invention. It is a thing. FIG. 2 is a schematic structural model cross-sectional view schematically showing the configuration of a twisted defect detection device for a twisted steel cord according to the present invention. FIG. 3 is a diagram for explaining the principle of detection of a twist defect in a twist defect detection device for a twist steel cord according to the present invention, and FIG. 3 (A) is a schematic cross-section illustrating a state in which no twist defect exists. In the model diagram, (B), there is a twist defect portion in the portion of the twisted steel cord 1 ′, and the steel cord 1 ′ jumps out of the groove 5 due to the presence of the twist defect portion, and the cord detection sensor portion 6. It is a schematic cross-section model figure explaining a state when contacting. FIG. 4 is a schematic view showing a rubber drawing and rolling device for twisted steel cords incorporating a twisted-fault detection device for twisted steel cords according to the present invention.

Explanation of symbols

1: twisted steel cord 2: core steel wire 3: sheathed steel wire 4: twisted steel cord twist defect detection device 5: groove 6: cord detection sensor 7: reel 8: grooved roll 9: dancer roll 10 : Device stop device 11: Calendar roll group 12: Alignment roll W: Maximum opening width H: groove depth _Dmax : Expected maximum diameter of twisted steel cord

Claims (10)

  A plurality of groove portions through which a plurality of twisted steel cords that are drawn out from the reels pass and extending in a direction intersecting with the cord running direction corresponding to all of the plurality of twisted steel cords and are raised from the groove portions A twist defect detection device for a twisted steel cord, comprising a cord detection sensor portion for sensing a twisted steel cord. Maximum opening width W twist of the steel cord desired maximum diameter D _max is substantially equal in the groove, is not more than 65% more than 45% of the intended maximum diameter D _max of the steel cord twist groove depth H The twist defect detection device for a twisted steel cord according to claim 1.   The twist detection unit for a twisted steel cord according to claim 1 or 2, wherein the cord detection sensor unit includes a pressure-sensitive or energized contact type sensor.   The twist detection unit for a twisted steel cord according to claim 1 or 2, wherein the cord detection sensor unit includes a photoelectric tube type non-contact type sensor.   The code detection sensor unit includes a plurality of cord detection sensor units in which a plurality of twisted steel cords are divided into a plurality of groups and are provided corresponding to each group. Or the twist defect part detection apparatus of the twisted steel cord of 4.   A dancer roll is provided in the upstream portion and / or downstream portion of the cord detection sensor portion, which is in contact with the traveling stranded steel cord and prevents the traveling stranded steel cord from swinging in the direction of the cord detection sensor. A twist defect detection device for a twisted steel cord according to claim 1, 2, 3, 4, or 5.   The twist defect detection device for a twisted steel cord according to claim 1, wherein the plurality of grooves are provided on a circumferential surface of the rotating roller.   The twisted steel cord according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the twisted steel cord is a cord having a core-sheath multilayer structure including a core steel wire portion and a sheath steel wire portion. A device for detecting twisted defects in cords.   A plurality of twisted steel cords drawn out from a reel in a rubber drawing and rolling apparatus that pulls out twisted steel cords from a plurality of reels, aligns the plurality of twisted steel cords using an alignment roll, and performs a rubber topping process. Before or during aligning, a plurality of groove portions through which a plurality of twisted steel cords that are drawn out of the reel and run across the entire rolling width direction and corresponding to all of the plurality of twisted steel cords. A rubber drawing and rolling apparatus for a twisted steel cord, comprising a detection mechanism for a twisted defect portion comprising a cord detection sensor portion that senses a twisted steel cord raised from the groove portion.   The apparatus for drawing a twisted steel cord into a twisted steel cord according to claim 9, wherein the device for detecting a twisted defective part has the twisted-fault detection unit for twisted steel cord according to any one of claims 1 to 8.

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