WO2010026754A1

WO2010026754A1 - Spiral winding device for strip material

Info

Publication number: WO2010026754A1
Application number: PCT/JP2009/004332
Authority: WO
Inventors: 浜地容佑; 長瀬友吾; 鳥海修一; 小野寺彰
Original assignee: 横浜ゴム株式会社
Priority date: 2008-09-04
Filing date: 2009-09-02
Publication date: 2010-03-11
Also published as: WO2010026749A1; CN102143833A

Abstract

A spiral winding device (28) for a strip material, suitable for manufacturing a rubber hose (10). The device (28) is provided with a rotatable mandrel (42), and also with a strip material supply mechanism (50) for supplying to the mandrel a strip material (SM) to be wound around the mandrel. The strip material supply mechanism is provided with a drum (60) around which the strip material is wound and stored, a brake mechanism (68) capable of applying controllable braking torque to rotation of the drum, a detection mechanism (70) for detecting the radial distance (RD) of a position at which the strip material is paid out of the drum, the radial distance (RD) being measured from the axis (AX) of the drum, and a braking torque control mechanism (74) for controlling braking torque applied by the brake mechanism to rotation of the drum based on the result of the detection by the detection mechanism (70), thereby controlling a pulling force acting on the strip material paid out of the drum.

Description

Strip material spiral winding device

The present invention relates to a strip material spiral winding device, which is suitable for manufacturing a rubber hose reinforced with a plurality of steel cords arranged in a spiral shape, for example. It can be used.

A rubber hose reinforced with a plurality of reinforcing cords (for example, steel cords) arranged in a spiral shape on the tube wall of the hose is used for distributing high-pressure hydraulic oil in a hydraulic system, for example. Reinforcing cords arranged spirally on the tube wall of this type of rubber hose are flexible and have high tensile rigidity, thereby at least partially enhancing the flexibility of the rubber hose. While maintaining, the rubber hose functions as a reinforcing member that prevents the rubber hose from being excessively deformed by being expanded or stretched by high pressure inside.

One manufacturing apparatus for manufacturing this type of rubber hose is a manufacturing apparatus disclosed in Japanese Patent Laid-Open No. 10-44214. A rubber hose manufactured by the manufacturing apparatus of the same publication is formed on an inner tube layer that defines a lumen of the rubber hose, a reinforcing layer formed on the outer periphery of the inner tube layer, and an outer periphery of the reinforcing layer. The rubber hose has a laminated structure composed of an outer tube layer that defines an outer peripheral surface of the rubber hose, and the reinforcing layer includes a plurality of reinforcing cords arranged in a spiral shape. This manufacturing apparatus includes a first extruder for extruding an inner tube, and a cord winding machine for winding a reinforcing cord in a spiral shape on the outer peripheral surface of the extruded inner tube (the same publication). Is called a "spiral machine") and a composite structure that is integrally combined with a second extruder that extrudes and forms an outer tube on the outer peripheral surface of the inner tube wound with a reinforcing cord. It is a device.
Japanese Patent Laid-Open No. 10-44214

However, the rubber hose manufacturing apparatus described in Japanese Patent Laid-Open No. 10-44214 is accompanied by the disadvantage that the structure is complicated and expensive. Therefore, there has been a demand for a strip material spiral winding device that can manufacture a rubber hose reinforced with a plurality of steel cords arranged in a spiral shape using a cheaper manufacturing device.

An object of the present invention is to provide a strip material spiral winding device that can be suitably used for manufacturing, for example, a rubber hose reinforced with a plurality of steel cords arranged in a spiral shape.

A spiral winding device for a strip material provided by the present invention includes a base frame, a mandrel rotatably supported by the base frame and capable of winding the strip material around the base frame, and driving the mandrel. A mandrel drive mechanism for rotating, a strip material supply mechanism for supplying a strip material to be wound around the mandrel toward the mandrel, and a feed movement mechanism for feeding and moving the strip material supply mechanism along the mandrel And a controller for controlling the mandrel drive mechanism and the feed movement mechanism, the controller being capable of feeding and moving the strip material supply mechanism along the mandrel in synchronization with the rotation of the mandrel. Is. The strip material supply mechanism includes a drum that has an axis and is rotatable around the axis, and the strip material is wound around the periphery of the drum, and the drum is wound around the mandrel and pulled. A guide mechanism for guiding the strip material fed out from the drum and supplied toward the mandrel, a brake mechanism capable of applying a controllable braking torque to the rotation of the drum, and the strip material fed out from the drum A detection mechanism for detecting a radial distance from the shaft center of the drum at a delivery position of the drum, and a braking torque that the brake mechanism acts on the rotation of the drum based on a detection result of the detection mechanism A braking torque control mechanism for controlling the tensile force acting on the strip material fed from the drum by controlling There.

The guide mechanism of the strip material supply mechanism has a curl direction curl when the strip material is wound around the mandrel on the strip material fed from the drum and supplied toward the mandrel. It may be provided with a curl giving mechanism for giving.

The curl imparting mechanism may include a cylindrical pin that is fed from the drum and supplied to the mandrel so that the strip material is wound around the circumferential surface and pressed against the circumferential surface. .

The winding radius in the free state of the strip material to which the curl has been imparted by the curl imparting mechanism may be equal to the radius of the mandrel.

According to the present invention, for example, a rubber hose reinforced by a plurality of steel cords arranged in a spiral shape can be manufactured by a relatively inexpensive manufacturing apparatus.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The attached drawings are as follows.

(A) shows a cross-section of a specific example of a rubber hose reinforced with a plurality of spirally arranged steel cords that can be manufactured using the spiral winding device of the strip material of the present invention. It is a schematic diagram and (B) is a partially broken view of this rubber hose. (A), (B), and (C) are cross-sectional views showing three types of composite strip materials, and these composite strip materials use the strip material spiral winding device of the present invention. The rubber hose shown in FIG. 1 can be used for manufacturing. It is the figure which showed the spiral winding apparatus of the strip material which concerns on suitable embodiment of this invention, and is the schematic diagram which showed arrangement | positioning of the component of the said apparatus with the top view. It is the schematic diagram which showed arrangement | positioning of the component of the strip material supply mechanism in the spiral winding apparatus of the strip material shown in FIG. 3 with the side view. (A), (B), (C), and (D) are explanatory drawings showing the winding process of the composite strip material that can be performed using the spiral winding device of the strip material shown in FIG. It is.

In the following description, the term “rubber” as used in connection with the present invention is not limited to natural rubber alone, and includes any elastomeric material referred to as synthetic rubber or other names, For example, in a uniform material composed of a single elastomer component, a uniform material obtained by mixing a plurality of types of elastomer components, a composite material composed of a plurality of elements composed of different elastomer components, and a base material composed of elastomer components. There are composite materials in which non-elastomeric components are dispersed or embedded, and various other forms of elastomer materials in various combinations thereof are also included. Also, the term “rubber hose” as used in connection with the present invention means a hose that uses rubber as the main material and, optionally, a non-rubber material.

In the following description, in order to better understand the spiral winding apparatus for strip material according to the present invention, first, a plurality of steel cords arranged in a spiral shape that can be manufactured using the apparatus. A specific example of the rubber hose reinforced with the above will be described.

As shown schematically in FIG. 1A, the rubber hose 10 of a specific example has a concentric laminated structure. The rubber hose 10 includes a flexible tube 11 (hereinafter referred to as “inner tube”) that forms the innermost layer of the laminated structure, and the inner tube 11 defines a lumen of the rubber hose 10. It is made. As a material for the inner tube 11, for example, oil resistant rubber or the like is used. The inner tube 11 itself may be a laminated tube.

The rubber hose 10 further includes a laminated reinforcing layer 14 formed on the outer periphery of the inner tube 11, and this laminated reinforcing layer 14 is provided with a plurality of reinforcing steel cords (steel cord) in a base material made of rubber. ) 12 is embedded. The reinforcing steel cords 12 are arranged so as to form four groups of

steel cords

16, 18, 20 and 22. Each of the

steel cord groups

16, 18, 20, and 22 includes a plurality of steel cords 12 arranged so as to extend spirally in parallel to each other on a single cylindrical surface, and the

steel cord groups

16, 18, 20, and 22 are arranged concentrically. Further, as shown in FIG. 1 (B), the steel cords 12 of the first steel cord group 16 and the third steel cord group 20 are wound in the first spiral direction, while the second steel cord group 18 is wound. The steel cords 12 of the fourth steel cord group 22 are wound in a second spiral direction opposite to the first spiral direction. The steel cord 12 is flexible and has a large tensile rigidity, so that the rubber hose 10 is expanded in diameter by a high pressure inside thereof while maintaining the flexibility of the rubber hose 10 at least partially. It functions as a reinforcing member that prevents it from being stretched and causing excessive deformation. How to form the laminated reinforcing layer 14 described above will be described in detail later.

The rubber hose 10 further includes a flexible tube 24 (hereinafter referred to as “outer tube”) formed around the laminated reinforcing layer 14. The outer tube 24 forms the outermost layer of the laminated structure of the rubber hose 10, and as the material of the outer tube 24, for example, wear-resistant rubber or the like is used. The outer tube 24 itself may be a laminated tube. The rubber hose 10 having the above configuration is suitable for use as a so-called high pressure hydraulic hose for circulating high pressure hydraulic oil in a hydraulic system.

The rubber hose 10 described above can be preferably manufactured by using a strip material spiral winding device according to an embodiment of the present invention described below, and the manufacturing process thereof is shown in FIG. (A) to FIG. 2 (C) include a step of forming the laminated reinforcing layer 14 using the composite strip material shown in its concrete example, and this composite strip material will be described first.

The composite strip material 26 of the three specific examples shown in cross-sectional views in FIGS. 2 (A) to 2 (C) is composed of two sides (opposite side surfaces) 30, 32 and both sides. And

edges

34, 36. Each of the composite strip members 26 is arranged in parallel with each other and the unvulcanized rubber strip 38 and the unvulcanized rubber strip 38 are arranged in parallel to each other in the longitudinal direction of the unvulcanized rubber strip 38 (hence, the composite strip). A plurality of reinforcing steel cords 12 extending in the longitudinal direction of the material 26, the plurality of steel cords 12 being coplanar extending parallel to the side surfaces 30, 32 of the composite strip material 26. Are arranged in a line. The steel cord 12 has flexibility and large tensile rigidity, and functions as a reinforcing material for the rubber hose 10 as described above.

In the composite strip material 26 shown in FIG. 2A, each steel cord 12 is entirely embedded in the unvulcanized rubber strip 36. In the composite strip material 26 shown in FIGS. 2 (B) and 2 (C), each steel cord 12 is partly embedded in the unvulcanized rubber strip 36, and the remaining part of the peripheral surface is formed. The unvulcanized rubber strip 36 is exposed to the outside from one side surface 32. In particular, in the composite strip material 26 of FIG. 2C, each steel cord 12 is more exposed than the composite strip material of FIG. 2B, that is, the peripheral surface of each steel cord 12 is exposed. A half-circumferential portion is embedded in the unvulcanized rubber strip 36, and the remaining half-circular portion of the peripheral surface is exposed to the outside from one side surface 32 of the unvulcanized rubber strip 36. The surface (circumferential surface) of the steel cord 12 is preferably plated with brass, and the reason will be described later.

FIG. 3 is a schematic view showing the arrangement of main components of the spiral winding device 28 for strip material according to a preferred embodiment of the present invention in a plan view. The strip material spiral winding device 28 shown in the figure includes a base frame (schematically shown by reference numeral BF in the figure) and a strip material around the base frame BF that is rotatably supported. A mandrel 42 on which SM (for example, the composite strip material 26) can be wound, and a mandrel driving mechanism for driving and rotating the mandrel 42 are provided. The mandrel driving mechanism grips one end of the mandrel 42. It comprises a power rotary head 44 provided with a chuck 46. The strip material spiral winding device 28 is further provided with a tailstock 48 that engages with the other end of the mandrel 42. The rotation drive head 44 and the core presser base 48 are attached to the base frame BF, and the mandrel 42 can rotate about its longitudinal axis through the power rotary head 44 and the core presser base 48. Supported by BF. The mandrel 42 can be removed from the base frame BF by operating the chuck 46 and the core presser 48.

The strip material spiral winding device 28 further includes a strip material supply mechanism 50 (strip material supplier) which is a mechanism for supplying the strip material SM to be wound around the mandrel 42 toward the mandrel 42, and A feeding movement mechanism 52 (feeding ため mechanism) for feeding and moving the strip material feeding mechanism 50 along the mandrel 42 is provided. The feed moving mechanism 52 includes a pair of guide rails 54 fixed to the base frame BF. The guide rails 54 include a mandrel 42 supported by a rotary drive head 44 and a core pusher 48 and the guide rails 54. It is arrange | positioned so that it may extend in parallel with. The feed moving mechanism 52 further includes a carriage 56, and this carriage 56 includes a traveling mechanism and can travel on the guide rail 54. A strip material supply mechanism 50 is mounted on the carriage 56.

The spiral winding device 28 of the strip material further includes a controller 58 that can control the power rotary head 44 that is a mandrel driving mechanism and the feed movement mechanism 52 individually and in association with each other. ing. The controller 58 can move the strip material supply mechanism 50 along the mandrel 42 in synchronization with the rotation of the mandrel 42 by controlling both in association with each other.

3 and 4, the strip material supply mechanism 50 includes a drum 60 and a guide mechanism 62 (see FIG. 4). The drum 60 has an axis AX and is supported by a carriage 56 so as to be rotatable around the axis AX. The strip material SM is wound around the drum 60 and stored. Therefore, the drum 60 is a strip material storage mechanism that stores the strip material SM supplied toward the mandrel 42. The guide mechanism 62 is also supported by the carriage 56, and the guide mechanism 62 guides the strip material SM fed out from the drum 60 and supplied toward the mandrel 42 by being wound around the mandrel 42 and being pulled. Mechanism. The drum 60 and the guide mechanism 62 are connected to the carriage 54 through a swing mechanism (not shown), and thereby tilt relative to the carriage 54 to change the direction in which the strip material SM is fed out. It is made to be able to.

The guide mechanism 62 includes a guide roller 64, and the strip material SM fed out from the drum 60 and supplied toward the mandrel 42 passes through the guide roller 64 and is guided by the guide roller 64. The guide mechanism 62 further includes a curl tacking mechanism 66. The curl tacking mechanism 66 is fed to the strip material SM that is fed from the drum 60 and supplied to the mandrel 42, and the strip material SM is supplied to the mandrel 42. It is a mechanism for imparting curl in the curl direction when wound around the periphery of the. The curl imparting mechanism 66 includes a cylindrical pin 67 that is fed from the drum 60 and supplied toward the mandrel 42 and is wound around the circumferential surface and pressed against the circumferential surface. When the strip material SM is fed out from the drum 60, it passes through the cylindrical pin 67, further passes through the guide roller 64, and is supplied toward the mandrel 42. The radius of the cylindrical pin 6 is appropriately determined so that the winding radius in the free state of the strip material SM to which the winding rod is applied in this way is equal to the radius of the mandrel 42. Giving the winding material to the strip material SM in this manner is advantageous in stably winding the strip material SM around the mandrel 42.

The strip material fed out from the drum 60 and supplied toward the mandrel 42 in order to satisfactorily wind the strip material SM around the mandrel 42 and to give the strip material SM a good curl. It is desirable that an appropriate tensile force is applied to the SM. In order to achieve this, the strip material supply mechanism 58 includes a brake mechanism 68 capable of applying a controllable braking torque with respect to the rotation of the drum 60, and a feeding position of the strip material SM fed out from the drum 60. A detection mechanism 70 that detects a radial distance RD (see FIG. 4) from the axis AX of the drum 60, and a braking torque that the brake mechanism 68 acts on the rotation of the drum 60 based on the detection result of the detection mechanism 70. And a braking torque control mechanism 74 for controlling the tensile force acting on the strip material SM fed out from the drum 60.

As the braking torque control mechanism 74, a commercially available programmable logic controller (also called “sequencer”) is used. As the detection mechanism 70, an ultrasonic range sensor that detects the distance to the object by detecting an echo of an ultrasonic pulse emitted toward the object is used, and the sensor 60 is wound around the drum 60. The distance to the surface of the strip material SM is detected, and the distance RD from the axis AX of the drum 60 to the surface is calculated in the sequencer 74 based on the detection result. As the brake mechanism 68, an air brake mechanism is used. The braking torque control mechanism 74 further includes a control valve 76 for controlling the air brake mechanism and an actuator 78 for operating the control valve 76 in accordance with an output signal output from the sequencer 74.

The sequencer 74 sets the air brake so as to be proportional to the radial distance RD from the axis AX of the drum 60 of the feeding position of the strip material SM fed out from the drum 60, which is calculated from the detection result of the detection mechanism 70. By controlling the braking torque generated by the mechanism, the tensile force acting on the strip material SM fed out from the drum 60 is maintained at a good magnitude. As a result, the strip material SM can be stably wound around the mandrel 42, and the winding material can be favorably imparted to the strip material SM. Note that the configuration for controlling the tensile force acting on the strip material SM fed from the drum 60 is not limited to that specifically described above, and various other configurations can be employed.

In order to make it easier to understand the operation of the strip material spiral winding device 28 having the above-described configuration, a specific example of a rubber hose manufacturing method will be described below. The detailed operation will be described in detail.

A rubber hose manufacturing method according to one embodiment, which is performed using the spiral winding device 28 of the strip material, includes the step of manufacturing the composite strip material 26, and the composite strip material 26 is previously As described with reference to FIGS. 2A to 2C, the unvulcanized rubber strip 38 and the unvulcanized rubber having both side surfaces 30 and 32 and both side edges 34 and 36, and the unvulcanized rubber. The strip is provided with a plurality of reinforcing steel cords 12 arranged in parallel to each other and extending in the longitudinal direction of the unvulcanized rubber strip. In order to manufacture the composite strip material 26, for example, an unvulcanized rubber is formed into a strip shape, and at the same time, a plurality of steel cords are completely or partially embedded as inserts in the unvulcanized rubber strip. What should I do? The manufactured composite strip material 26 is wound around the drum 60 of the strip material supply mechanism 56 and stored in the drum 60.

The rubber hose manufacturing method further includes a step of manufacturing a flexible inner tube 11 for forming the innermost layer of the rubber hose 10. The inner tube 11 may be formed using a known rubber tube manufacturing method. In that case, the inner tube 11 is cut according to the length of the rubber hose to be manufactured, and the mandrel 42 is cut. Fit on the outer periphery. Alternatively, an unvulcanized rubber strip may be spirally wound around the outer periphery of the mandrel 42, and the wound unvulcanized rubber strip may be subsequently vulcanized to form the inner tube 11. . In any case, if necessary, an appropriate release agent or the like is applied to the inner surface of the inner tube 11 and / or the outer surface of the mandrel so that the inner tube 11 can be removed from the mandrel after the rubber hose is completed. It is good to leave.

The rubber hose manufacturing method further includes a step of forming a laminated reinforcing layer 14 having a plurality of steel cords 12 arranged in a spiral shape around the inner tube 11. In this step, the composite strip material 26 is wound around the inner tube 11, and a wound structure having a laminated structure in which a plurality of unit layers 90 to 96 (see FIG. 1B) are laminated. Form the body. At that time, one unit layer is formed on (around) the inner tube 11, and another unit layer is formed successively on (on the periphery) of the formed unit layer. Thereafter, the unvulcanized rubber strip 38 of the wound composite strip material 26 is vulcanized.

More specifically, as shown in FIG. 3, the front end portion of the composite strip material 26 fed from the drum 60 is fixed to one end (left end in FIG. 3) of the inner tube 11 on the mandrel 42, and then the strip The material spiral winding device 28 is operated to rotate the mandrel 42, and the carriage 54 is fed along the guide rail 52 (in the illustrated example, from the left end to the right end in FIG. 3), whereby the composite strip. The material 26 is wound around the outer circumference of the inner tube 11 in a spiral shape. At this time, one side surface (for example, the side surface 30) of the composite strip material 26 is brought into contact with the outer peripheral surface of the inner tube 11, and the side edge of the composite strip material 26 forming one turn of the spiral and the turn adjacent thereto are arranged. The composite strip material 26 is spirally wound around the outer peripheral surface of the inner tube 11 with the side edges of the composite strip material 26 to be formed, and the outer peripheral surface of the inner tube 11 is covered with the composite strip material 26. . As a result, the first (innermost) unit layer 90 (see FIG. 1B) is formed on (around) the inner tube 11.

When forming the unit layer 90 in this way, as shown in FIG. 5A, the single composite strip material 26 is made to have the spiral pitch P equal to the width dimension W of the composite strip material 26, The single composite which forms the side edge of the single composite strip material 26 which forms one turn of the spiral and the turn adjacent to the spiral is wound on the outer peripheral surface of the inner tube 11 in a spiral shape. The side edges of the strip material 26 may be brought into close contact with each other. Alternatively, as shown in FIGS. 5 (B) to 5 (D), when forming each unit layer, a plurality of composite strip members 26 are arranged in parallel spiral on the outer peripheral surface of the inner tube 11. The side edge of one composite strip member of the plurality of composite strip members may be brought into close contact with the side edge of the composite strip member adjacent thereto. In the latter case, the spiral pitch P may be set to N times the width W of the composite strip material 26, where N is the number of composite strip materials wound on the outer peripheral surface of the inner tube 11. is there.

Once the first unit layer 90 is formed, the second unit layer 92 is subsequently formed on (around) the formed first unit layer 90. At that time, the tip of the composite strip material 26 fed from the drum 60 is fixed to one end (right end in FIG. 3) of the first unit layer 90, and then the spiral winding device 28 of the strip material is operated. Then, while rotating the mandrel 42, the carriage 54 is fed and moved along the guide rail 52 (in the illustrated example, from the right end to the left end in FIG. 3), whereby the composite strip material 26 is moved to the first unit layer 90. Wound spirally around the periphery. At this time, one side surface (for example, the side surface 30) of the composite strip material 26 is brought into contact with the outer peripheral surface of the first unit layer 90, and the side edge of the composite strip material 26 forming one spiral is adjacent to the side edge. The composite strip material 26 is spirally wound on the outer peripheral surface of the first unit layer 90 with the side edges of the composite strip material 26 forming the turn closely, and the outer peripheral surface of the first unit layer 90 is wound around the composite strip material. 26. As a result, the second unit layer 92 is formed on (around) the first unit layer 90.

The rotation direction of the mandrel 42 is the same when the first unit layer 90 is formed and when the second unit layer 92 is formed. This rotation direction is indicated by an arrow 80 in FIG. The relative winding direction of the strip material 26 with respect to the mandrel 42 is opposite to the rotation direction 80 of the mandrel 42 as indicated by an arrow 82. As is clear from FIG. 1B, the spiral direction of the composite strip material 26 forming the first unit layer 90 and the spiral direction of the composite strip material 26 forming the second unit layer 92 are mutually The opposite direction is the same, and the relative winding direction 82 of the strip material 26 with respect to the mandrel 42 is the same between the two, whereas the winding direction of the composite strip material 26 ( In other words, the strip material supply mechanism 50 is moved in the opposite direction).

Next, the composite strip material 26 is wound from the left end to the right end in FIG. 3 in the same manner as when the first unit layer 90 is formed around the second unit layer 92 thus formed. A third unit layer 94 is formed on (around) the unit layer 92. Further, the third unit layer 94 is wound around the third unit layer 94 thus formed by winding the composite strip material 26 from the right end to the left end in FIG. 3 in the same manner as when the second unit layer 92 is formed. A fourth unit layer 96 is formed on (around) 94. As shown in FIG. 1B, the unit layers 90 to 96 formed by this unit layer forming method include a unit layer obtained by winding the composite strip material 26 in the first spiral direction, and the composite strip material 26 in the first spiral direction. It is formed by alternately laminating unit layers wound in two spiral directions.

In the first unit layer 90, the base outer peripheral surface on which the unit layer 90 is formed is the outer peripheral surface of the inner tube 11, whereas the second unit layer 92, the third unit layer 94, In the four unit layer 96, the base outer peripheral surface on which the unit layer is formed is the outer peripheral surface of the unit layer formed prior to the unit layer. However, this does not affect the procedure for forming the unit layer. If the above process for forming the laminated reinforcing layer 14 around the inner tube 11 is summarized, when each unit layer is formed, the base outer peripheral surface on which the unit layer is formed is formed. One side surface of the composite strip material 26 is brought into contact with each other, and the side edge of the composite strip material 26 forming one turn of the spiral is closely contacted with the side edge of the composite strip material 26 forming the adjacent turn. By winding the composite strip material 26 spirally around the foundation outer circumferential surface, the foundation outer circumferential surface is covered with the composite strip material 26.

When using the composite strip material 26 in which the steel cord 12 is exposed from one side face 28 of the unvulcanized rubber strip 38 as shown in FIG. 2 (B) or FIG. 2 (C), For any unit layer 90-96, the composite strip material 26 wound around the mandrel 42 (and thus around the inner tube 11) may have its same side facing the mandrel 42. Preferably, this is because by doing so, interference between the steel cords 12 of the unit layers adjacent in the vertical direction can be easily avoided. For example, in the rubber hose 10 shown in FIG. 1 (B), the composite strip material 26 of any unit layer 90 to 96 has the side surface 30 on which the steel cord 12 is not exposed directed toward the mandrel 42. In FIG. 1B, the steel cord 12 appears to be exposed on the outer peripheral surface of each

unit layer

90, 92, 94, 96.

According to the method of winding the composite strip material described above, the spiral angle of the composite strip material 26 wound in a spiral shape (therefore, the spiral angle of the steel cord 12) is the diameter of the unit layer to be formed, the spiral Further, the pitch P of the spiral is influenced by the width dimension W of the composite strip material 26. Therefore, the width dimension W of the composite strip material 26 is appropriately determined in advance according to the target spiral angle of the steel cord 12 of the rubber hose to be manufactured. Further, when the first to fourth unit layers 90 to 96 are formed using the same composite strip material 26, the diameters of the unit layers are different, so that the spiral angles of the steel cords in the unit layers are also different from each other. Thus, the spiral angle in the first unit layer 90 is the largest, and the spiral angle in the fourth unit layer 96 is the smallest. Therefore, if the spiral angle of the steel cord 12 is desired to be the same in all unit layers, the unit layers may be formed using composite strip materials having different width dimensions, that is, The width dimension of each composite strip is appropriately determined by making the width dimension of the composite strip material forming one unit layer 90 the smallest and the width dimension of the composite strip material forming the fourth unit layer 96 being the largest. Just do it.

Further, when the composite strip material 26 is wound around the inner tube 11 or around the already formed unit layer, a powder (for example, sulfur powder) of a sulfur-containing substance is attached to the surface of the composite strip material 26. In particular, as shown in FIGS. 2 (B) and 2 (C), the peripheral surface of the steel cord 12 is exposed to the outside from one side of the unvulcanized rubber strip 38. It is advantageous when using a composite strip material 26 in which the peripheral surface of the steel cord 12 is brass-plated, because when vulcanization is performed later by attaching such a powder. Further, the surface of the steel cord 12 plated with brass exposed from the composite strip material 26 of one unit layer and the unvulcanized rubber of the composite strip material 26 of the adjacent unit layer This is because bonding strength between the surface of the lip 38 is increased.

When carrying out the above-described method of winding a composite strip material using the spiral winding device 28 of the strip material according to the present invention, the composite strip material 26 is applied while applying an appropriate tension to the composite strip material 26. The composite strip material can be wound on the outer peripheral surface of the inner tube 11 or the outer peripheral surface of the unit layer that has already been formed. 26 can be wound on the outer peripheral surface of the inner tube 11 or on the outer peripheral surface of the unit layer that has already been formed, the composite strip material 26 can be wound on the outer peripheral surface in a stable state.

By repeating the step of forming the unit layer as described above to form a plurality of unit layers 90 to 96, the unvulcanized laminated reinforcing layer 14 is formed. Subsequently, an outer tube 24 that covers the surface of the laminated reinforcing layer 14 is formed on the outer periphery of the unvulcanized laminated reinforcing layer 14. This process can be carried out by using a strip material spiral forming apparatus 28, for example, a strip material made of unvulcanized rubber which becomes a wear-resistant rubber after vulcanization, which is a material of the outer tube 24. Then, it is wound around the drum 60 of the strip material supply mechanism 50 and stored in this drum 60, and the unvulcanized rubber strip material is spirally wound around the surface of the unvulcanized laminated reinforcing layer 14. do it. In this case, the unvulcanized rubber strip material may be wound so that there is an overlap (over wrapping) between one side edge in one turn and the other side edge in the next turn. .

Subsequently, the mandrel 42 is removed from the spiral forming device 28 of the strip material, and is carried into the vulcanization processing device. Apply sulfur treatment. Subsequently, a rubber hose 10 as a final product is obtained by pulling out the vulcanized rubber hose 10 from the mandrel 42.

DESCRIPTION OF SYMBOLS 10 Rubber hose 11 Inner tube 12 Steel cord for reinforcement 14

Laminated reinforcement layer

16, 18, 20, 22 Steel cord group 24 Outer tube 26 Composite strip material 28 Strip material

spiral winding device

30, 32 Side surface of

composite strip material

34 , 36 Side edges of composite strip material 38 Unvulcanized rubber strip 42 Mandrel 44 Power rotary head 46 Chuck 48 Core support 50 Strip material supply mechanism 52 Feed movement mechanism 54 Guide rail 56 Carriage 58 Controller 60 Drum 62 Guide mechanism 64 Guide roller 66 Winding rod imparting mechanism 67 Cylindrical pin 68 Brake mechanism 70 Detection mechanism 74 Braking torque control mechanism 74 Programmable logic controller 76 Control valve 78

Actuator

9 , 92, 94 and 96 units layer

Claims

A basic frame,
A mandrel rotatably supported by the base frame and capable of winding a strip material around the mandrel;
A mandrel drive mechanism for driving and rotating the mandrel;
A strip material supply mechanism for supplying a strip material to be wound around the mandrel toward the mandrel;
A feed movement mechanism that feeds and moves the strip material supply mechanism along the mandrel;
A controller for controlling the mandrel driving mechanism and the feed movement mechanism, and a controller capable of feeding and moving the strip material supply mechanism along the mandrel in synchronization with the rotation of the mandrel,
The strip material supply mechanism includes:
A drum having an axial center and rotatable around the axial center, in which a strip material is wound around and stored;
A guide mechanism that guides the strip material fed from the drum and supplied toward the mandrel by being wound and pulled by the mandrel;
A brake mechanism capable of applying a controllable braking torque to the rotation of the drum;
A detection mechanism (detector) for detecting a radial distance from the axis of the drum of the feeding position of the strip material fed from the drum;
A braking torque control mechanism that controls the tensile force that acts on the strip material fed from the drum by controlling the braking torque that the brake mechanism acts on the rotation of the drum based on the detection result of the detection mechanism. When,
With
A spiral winding device for strip material.
The guide mechanism of the strip material supply mechanism has a curl direction curl when the strip material is wound around the mandrel on the strip material fed from the drum and supplied toward the mandrel. It is equipped with a curl tacking mechanism for imparting,
The spiral winding device for a strip material according to claim 1.
The curl imparting mechanism includes a cylindrical pin that is fed from the drum and supplied to the mandrel, and the strip material is wound around the circumferential surface and pressed against the circumferential surface.
The strip material spiral winding device according to claim 2, wherein:
The winding radius in the free state of the strip material to which the curl is imparted by the curl imparting mechanism is equal to the radius of the mandrel,
4. A strip material spiral winding apparatus according to claim 3, wherein: