JP2006334796A - Wire winding method of rubber hose and wire winding apparatus of rubber hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire winding method of a rubber hose capable of spirally winding a wire around the rubber hose accurately without causing intrusion insufficiency or excessive intrusion to the rubber hose even if the shape or state of the rubber hose changes, and a wire winding apparatus of the rubber hose. <P>SOLUTION: In the wire winding apparatus of the rubber hose 1 having a drive mechanism 2 which supports the rubber hose 1 to freely move in both of a drive rotary direction and a rotary axis direction and a wire supply mechanism 4 for freely sending out and supplying the reinforcing wire 3 and constituted so that the reinforcing wire 3 is freely spirally wound around the rubber force 1 in an unvalcanized state by winding the reinforcing wire 3 sent out of the wire supply mechanism 4 around the rubber hose 1 supported on the drive mechanism 2 to be rotated and laterally moved, the wire supply mechanism 4 has an incident angle keeping means 4D for keeping the winding incident angle α of the wire 3 constant with respect to the outer peripheral surface 1c of the rubber hose 1 in the rotary axis X-direction of the rubber hose 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wire winding method and a winding device for a rubber hose in a high-pressure rubber hose or the like in which a reinforcing spiral wire is spirally wound and embedded in a thick intermediate portion.

  The above rubber hose is often used as a basic component in a rubber product or high pressure hose that requires high pressure reinforcement. As an example, it is used as a docking hose attached to the boom of a concrete pump truck. As a concrete pump car and a docking hose used therefor, those disclosed in Patent Document 1 are known.

  Reinforcing spiral wires are used for various purposes such as preventing deformation when the hose is bent, increasing pressure resistance, preventing deformation due to external loads and impacts, and preventing buckling during loading. When used in a docking hose for a concrete pump car, the wire must inevitably have a large diameter because it can withstand large loads, high pressure, small bending, negative pressure, and external force. Things are needed. Further, in order to wind around a tapered cylindrical rubber, it is necessary to change the winding conditions depending on the state of the rubber hose to be wound and the purpose of use, such as changing the winding diameter of the wire.

  Conventionally, a wire wound around a large-sized bobbin is taken out by rotating the bobbin together and unwound, and the taken-out wire is forcibly wound around a rubber hose by the rotational force of a mandrel, or A means has been adopted in which a wire is processed into a coil shape in advance, and a wire taken out by rotating the coiled wire is forcibly wound around a rubber hose by the rotational force of a mandrel. Further, regarding a method and an apparatus for winding a wire around a rubber hose, there is one disclosed in Patent Document 2, but this is described as “unwinding a wire wound around a drum having a constant diameter and winding it around a rubber hose. "

In these cases, the wire was wound by moving the winding position in the axial direction of the mandrel at a constant speed while keeping the rotation speed of the mandrel constant, but the wire was thick or the rubber hose was tapered. For example, when the winding pitch fluctuation is accurately controlled, a change in the winding diameter and a fluctuation in the winding pitch become remarkable, and the wire is biting into the rubber hose or the biting is insufficient (FIG. 7). ), It was not possible to wind correctly. Since these cause inconveniences such as a decrease in pressure resistance and a decrease in bending characteristics, there remains room for improvement in the method of winding the wire around the rubber hose.
JP 9-317957 A JP-A-9-296607

  The object of the present invention is to wrap around a rubber hose in a helical manner, even if the shape and state of the rubber hose changes variously, the conventional problem of insufficient bite or excessive bite into the rubber hose occurs. The point is to provide a method for winding a wire of a rubber hose and a winding device that can be wound correctly.

The invention according to claim 1 is a method of spirally winding a reinforcing wire 3 around an unvulcanized rubber hose 1.
The rubber hose 1 has a winding step of winding the wire 3 around the rubber hose 1 while keeping a winding incident angle α of the wire 3 with respect to the hose outer peripheral surface 1c as viewed in the axial X direction. is there.

  According to a second aspect of the present invention, in the wire winding method of the rubber hose according to the first aspect, before the wire 3 is provided with a bending rod in the same direction as the bending direction when the wire 3 is wound around the rubber hose 1. In addition to having a treatment step, the winding step is performed after the pretreatment step.

  According to a third aspect of the present invention, in the wire winding method of the rubber hose according to the second aspect, in the pretreatment step, the curvature of the bending rod is changed to a large or small size in synchronization with the diameter of the rubber hose 1. It is characterized by this.

  The invention according to claim 4 is characterized in that, in the wire winding method of the rubber hose according to any one of claims 1 to 3, the winding speed of the wire 3 around the rubber hose 1 is made constant. Is.

  According to a fifth aspect of the present invention, in the wire winding method of the rubber hose according to the fourth aspect, the rotational speed of the rubber hose 1 in the wire winding direction is determined by the diameter of the portion s around which the wire 3 in the rubber hose 1 is wound. The winding speed is made constant by changing in synchronism with the size.

  The invention according to claim 6 is the wire winding method of the rubber hose according to claim 1 or 2, wherein the rotational speed of the rubber hose 1 in the wire winding direction and the feeding for winding the wire 3 around the rubber hose 1 are provided. However, the speed is synchronized.

The invention according to claim 7 has a drive mechanism 2 that supports the rubber hose 1 and is capable of driving rotation and lateral movement in the direction of the rotation axis, and a wire supply mechanism 4 that can feed and supply the reinforcing wire 3. The reinforcing wire 3 is spirally wound around the unvulcanized rubber hose 1 by winding the wire 3 fed from the wire supply mechanism 4 around the rubber hose 1 that is supported by the drive mechanism 2 and rotates and moves laterally. In the wire winding device of the rubber hose that is configured to be freely wound around,
The wire supply mechanism 4 has incident angle maintaining means 4D for maintaining a constant winding incident angle α of the wire 3 with respect to the outer circumferential surface 1c of the rubber hose 1 when viewed in the direction of the rotation axis X of the rubber hose 1. It is what.

  The invention according to claim 8 is the rubber hose wire winding device according to claim 7, wherein the wire supply mechanism 4 is bent in the same direction as the bending direction when the wire 3 is wound around the rubber hose 1. The wire 3 is provided with pre-bending means Y for applying the wire 3 to the wire 3, and the wire 3 to which the bending wrinkle is provided by the pre-bending means Y is wound around the rubber hose 1 through the incident angle maintaining means 4D. It is characterized by being.

  The invention according to claim 9 is the rubber hose wire wrapping device according to claim 8, wherein the pre-bending means Y is capable of changing the curvature of the bending rod to be large or small in synchronization with the diameter of the rubber hose 1. It is characterized by being constituted by anything.

  According to a tenth aspect of the present invention, in the wire hose winding device for the rubber hose according to the ninth aspect, the wire 3 is fed around the rubber hose 1 supported by the drive mechanism 2. A guide tool 22 that forcibly bends the feeding direction is provided so as to be movable and adjustable in the radial direction of the rubber hose 1, and the position of the guide tool 22 is set at the position s around the wire 3 in the rubber hose 1. The incident angle maintaining means 4D is configured by providing a curvature adjusting device 4C that is movable depending on the diameter.

  According to an eleventh aspect of the present invention, in the wire winding device for a rubber hose according to any one of the seventh to tenth aspects, the drive mechanism 2 determines the rotational speed of the rubber hose 1 so that the wire 3 in the rubber hose 1 The winding speed of the wire 3 around the rubber hose 1 can be maintained constant by changing in synchronism with the diameter of the wound portion s.

  The invention according to a twelfth aspect is the rubber hose wire winding device according to any one of the seventh to eleventh aspects, wherein the wire feeding speed by the wire supply mechanism 4 is set to the speed of the rubber hose 1 by the drive mechanism 2. It is equipped with speed tuning control means e4 that varies in synchronization with the rotational speed in the wire winding direction.

  According to the invention of claim 1, although described in detail in the embodiments, even if the thickness and shape of the rubber hose change or the diameter of the wire changes, the wrapping incident angle of the wire with respect to the rubber hose is constant. Therefore, there is no change in the rebound force of the wire due to the fluctuation of the winding incident angle when the wire starts to be wound around the rubber hose, and it is always embedded in the unvulcanized rubber with a constant force. Will be. As a result, when winding the reinforcing wire spirally around the rubber hose, even if the shape and state of the rubber hose change variously, the inconveniences such as insufficient biting into the rubber hose and excessive biting are eliminated, and the winding is performed correctly. A wire winding method for a rubber hose that can be attached can be provided.

  According to the invention of claim 2, since the wire is wound around the rubber hose after the bending hook is attached, the wire is reasonably stable in a desired curvature state as compared with the case where the wire is suddenly bent according to the diameter of the rubber hose. It is possible to bend, and it is possible to reinforce the operational effect according to the invention of claim 1.

  According to the invention of claim 3, since the curvature of the bending rod in the pretreatment step is increased or decreased in accordance with the diameter of the rubber hose to be wound with the wire, it can be bent smoothly regardless of the diameter of the rubber hose. Since the hook can be attached and the wire can be wound around the rubber hose in a stable manner, it is possible to reinforce the operational effect of the invention of claim 1.

  According to the invention of claim 4, since the winding speed of the wire to the rubber hose is constant, the amount of biting into the rubber hose due to the change of the winding speed does not occur, and more uniform. A wire winding method for a rubber hose that can realize the winding state of the wire and can reinforce the operational effect according to the invention of claim 1 can be provided. In this case, as in claim 5, a constant winding speed can be realized by changing the rotational speed in synchronization with the diameter of the wire winding portion of the rubber hose.

  According to the invention of claim 6, since the wire winding speed and the wire feeding speed are synchronized, for example, the wire winding speed is higher than the wire feeding speed and the wire is pulled. It works better by eliminating the inconvenience of excessive biting into the rubber hose, or the wire winding speed being slower than the wire feeding speed and the wire becoming loose, resulting in insufficient biting into the rubber hose. A wire winding method is provided.

  The invention according to claim 7 is an embodiment of the invention according to claim 1, and the same effect as that of the invention of claim 1 can be obtained.

  The invention of claim 8 is an apparatus of the invention of claim 2, and the same effect as that of the invention of claim 2 can be obtained.

  The ninth aspect of the present invention is an apparatus according to the third aspect of the present invention, and an operational effect equivalent to the operational effect of the third aspect of the invention can be obtained.

  The invention of claim 10 is an apparatus of the invention of claim 4, and the same effect as that of the invention of claim 4 can be obtained.

  The invention of claim 11 is an apparatus of the invention of claim 5, and the same effect as that of the invention of claim 5 can be obtained.

  The invention of claim 12 is an implementation of the invention of claim 6, and the same effect as that of the invention of claim 6 can be obtained.

  DESCRIPTION OF EMBODIMENTS Embodiments of a rubber hose wire winding method and a winding apparatus according to the present invention will be described below with reference to the drawings. 1 to 3 are a front view, a left side view, and a right side view of the wire supply mechanism, FIG. 4 is a control system diagram of the whole wire winding apparatus, and FIG. 5 shows a winding state and a winding incident angle of the wire, respectively. A conceptual diagram and FIG. 6 are partial sectional views showing the structure of the docking hose.

[Example 1]
As shown in FIG. 4, the wire winding apparatus A according to the first embodiment supports a rubber hose 1 fitted to a mandrel 6 and is capable of driving rotation and lateral movement in the rotational axis X direction. The wire supply mechanism 4 that can send and supply the reinforcing wire 3 and the control device 5 that controls the drive mechanism 2 and the wire supply mechanism 4 are configured to be sent out from the wire supply mechanism 4. By winding the wire 3 around the rubber hose 1 that is supported by the drive mechanism 2 and rotates and moves laterally, the reinforcing wire 3 is spirally wound around the unvulcanized rubber hose 1.

  The mandrel 6 is formed into a cylindrical body having a small-diameter side end 6a having a small diameter, a large-diameter side end 6b having a larger diameter, and a tapered portion 6T whose outer peripheral length changes as it moves in the axis X direction. ing. The rubber hose 1 fitted to the mandrel 6 has a tapered cylindrical shape having a small-diameter end portion 1a, a large-diameter end portion 1b, and a tapered cylindrical portion 1T. It is formed in a three-layer structure (see FIG. 6) of inner and outer two-layer fiber reinforcing layers 8 and 8 made of rubber cylinders as reinforcing fibers and an intermediate rubber g.

  The driving mechanism 2 includes a rotating mechanism 2A that drives and rotates the mandrel 6, and a moving mechanism 2B that drives and moves the mandrel 6 in the direction of the axis X together with the rotating mechanism. The rotating mechanism 2A is configured so that the mandrel 6 can be driven and rotated at an arbitrary speed in the forward and reverse directions using, for example, an electric geared motor 9 or the like. The moving mechanism 2B includes, for example, a pair of rails 11 and 11 that support a bed 10 that rotatably supports the mandrel 6 so as to be parallel to the axis X direction, a screw shaft 12 that is screwed to the bed 10, and a screw And an electric motor 13 for driving and rotating the shaft 12, and the bed 10, that is, the mandrel 6 is configured to be movable in parallel in the direction of the arrow B or B by the forward / reverse driving of the electric motor 13.

  The wire supply mechanism 4 winds the wire 3 around the rubber hose 1 after the pretreatment step of giving the wire 3 a bending wrinkle in the same direction as the bending direction when the wire 3 is wound around the rubber hose 1. The winding process can be performed. As shown in FIGS. 1 to 3, a frame F composed of a pair of left and right vertical plates 14 and 15 and a plurality of guide rollers 16 to 23, a wire feeding device 4 </ b> A, a wire bending device 4 </ b> B, and a curvature The wire supply mechanism 4 includes an adjustment device 4C and an incident angle setting device 4D. Each of the left and right vertical side plates 14 and 15 is constituted by bolting main vertical plates 14A and 15A and front end vertical plates 14a and 15a, and the rubber hose 1 is passed through the vertical side plates 14 and 15 respectively. The octagonal insertion holes 14h and 15h are formed.

  The wire push-out device 4A is disposed on one end side above the frame F, and includes three guide rollers 16 rotatably supported by a lower connecting portion 18 straddling the left and right vertical plates 14 and 15; Three presser rollers 17 rotatably supported by an upper connecting member 19 straddling the vertical side plates 14 and 15, and an electric motor 20 that drives and rotates one of the three guide rollers 16. Configured. Three guide rollers 16 having a substantially pulley shape are arranged at the front and rear at the same height level, and a drum-shaped presser roller 17 is disposed on the upper side of each guide roller 16 so as to correspond to each guide roller 16. The wire 3 can be clamped up and down by three sets of the roller 16 and the presser roller 17. Therefore, if the electric motor 20 is operated to drive and rotate one guide wheel 16, the wire 3 can be driven and sent in a straight line in the direction of arrow C.

  The wire bending device 4B is for forcibly bending the wire 3 fed out from the wire supply mechanism 4 toward the centers of the insertion holes 14h and 15h, that is, the axis X. It is comprised by the eight guide rollers 16-23 arrange | positioned around the penetration holes 14h and 15h between the vertical side plates 14 and 15. FIG. That is, the first, third, fifth, seventh and eighth guide rollers 16, 18, 20, 22 and 23 from the upper supply side of the wire 3 are arranged on the outer diameter side of the wire 3 with respect to the axis X, and The second, fourth, and sixth guide rollers 17, 19, and 21 are arranged on the inner diameter side of the wire 3 with respect to the axis X, and the positions of the first to eighth guide rollers 16 to 23 can be adjusted in the radial direction. It is supported by.

  As described above, the wire supply mechanism 4 has the pre-bending means Y (the wire bending device 4B) that gives the wire 3 a bending rod in the same direction as the bending direction when the wire 3 is wound around the rubber hose 1. The wire 3 to which bending wrinkles have been applied by the pre-bending means Y is wound around the rubber hose 1, and the pre-bending means Y mainly includes the first to sixth guide rollers 16 to 21. By the wire bending device 4B and the support structure in which the first to sixth guide rollers 16 to 21 can be adjusted in the radial direction of the axis X, the curvature of the bending rod is adjusted in synchronism with the diameter of the rubber hose 1. It is configured to change in size.

  The guide rollers 16 to 23 can adjust the position of the support shafts 16a to 23a with respect to the shaft center X by using the support holes 14b and 15b for the vertical plates 14 and 15 of the support shafts 16a to 23a as long holes with respect to the shaft center X, for example. By supporting it, the curvature of the bending rod can be changed freely in synchronism with the diameter of the rubber hose 1. That is, when the absolute diameter of the rubber hose 1 is different in size, the position of each guide roller 16 to 23 is also adjusted so that a bending rod corresponding to the diameter of the rubber hose 1 can be attached. . In particular, the first guide roller 16 and the second guide roller 17 that first give the wire 3 bending wrinkles may be referred to as “curvature adjusting rollers”.

Then, around a rubber hose 1 supported by the drive mechanism 2, a seventh guide roller (a guide tool for abutting the wire 3 fed from the wire feeding device 4 </ b> A and forcibly bending the feeding direction) A curvature adjusting device 4 </ b> C is provided in which an example of a guide tool 22 is provided so as to be movable and adjustable in the radial direction of the rubber hose 1. The curvature adjusting device 4C also functions as an incident angle setting device 4D that can move depending on the diameter of the portion s around the wire 3 in the rubber hose 1 where the wire 3 is wound.

In addition, by providing a curvature adjustment control means 5D that moves the perspective position of the seventh guide roller 22 with respect to the axis X depending on the diameter of the portion s around which the wire 3 is wound in the rubber hose 1, an incident angle maintaining means is provided. An incident angle setting device 4D is configured.

  As shown in FIG. 1, in the first embodiment, the eighth guide roller 23 is preliminarily disposed, and the seventh guide roller 22 substantially located on the lowest supply side of the wire 3 is formed by an electric cylinder or the like. The drive retracting means 29 is configured so that the position can be adjusted and maintained in the radial direction of the axis X. As shown in FIG. 2, one end portion of the support shaft 22a that rotatably supports the seventh guide roller 22 is fitted and fixed to the tip boss portion 29a of the push / pull rod 29A of the drive retracting means 29, and the like. The end is inserted in a guide groove 22g formed in the right vertical side plate 15 so as to be movable in parallel, and the seventh guide roller 22 is moved in a direction approaching the axis X by the forward rotation drive of the drive retracting means 29, It is moved in the direction away from the axis X by the reverse drive.

  That is, the wires 3 are alternately passed through the inner and outer diameter sides of the first to seventh guide rollers 16 to 22 to forcibly bend the wire 3 to be fed and to adjust the position of the seventh guide roller 22 as the final presser. A curvature adjusting device 4C that determines the curvature of the wire 3 by the wire bending device 4B is configured. Further, by adjusting the position of the seventh guide roller 22 as the diameter of the rubber hose 1 passed through the insertion holes 14h and 15h is different, the incident angle α when the wire 3 is wound around the rubber hose 1 [FIG. see b)] can be kept constant. That is, the wire supply mechanism 4 has means (incident angle setting device 4D) capable of maintaining a constant winding incident angle α of the wire 3 with respect to the hose outer peripheral surface 1c as viewed in the axial direction X of the rubber hose 1. The curvature adjusting device 4C may have a structure for adjusting the positions of the sixth and seventh guide rollers 21 and 22, or a structure for adjusting the positions of the fifth to seventh guide rollers 20 to 22.

  In the wire bending device 4B, the first to third guide rollers 16 to 18 are arranged so that the wire 3 is positioned at the center between the left and right vertical plates 14 and 15, but the fourth guide roller 19 and the subsequent ones. The left and right positions are configured so as to gradually approach the left vertical side plate 14, whereby the wire bending device 4B is configured to exhibit the function of bending the wire 3 in the axial center X direction while bending the wire 3 in the radial direction. ing. Accordingly, the wire 3 fed out from the seventh guide roller 22 is bent in a coil shape in the natural state. The situation in which the wire 3 is spirally wound around the outer peripheral surface 1c of the rubber hose 1 by the wire supply mechanism 4 is as shown in FIG. FIG. 5A shows a conceptual diagram, and the detailed structure thereof is not accurately compared with the wire supply mechanism 4 shown in FIGS.

  The winding incident angle α with respect to the outer peripheral surface 1c of the rubber hose 1 immediately before the winding of the wire 3 around the rubber hose 1 is defined as shown in FIG. 5B, for example. Assuming that the wire 3 is first brought into contact with the rubber hose 1 at a point (location where the wire in the rubber hose is wound) s and winding is started, the winding incidence which is an angle in the tangential direction of the wire 3 at the winding start point s. The angle is always "0 degrees" and cannot be defined. Therefore, the tangent (or normal) m of the rubber hose 1 at a specific point Q, which is a portion on the inner diameter side of the wire 3 before the predetermined angle θ from the winding start point s, and the tangent to the center of curvature of the wire 3 at that point ( Alternatively, it is conceivable to define the angle difference from the normal line) n as the winding incident angle α. In FIG. 5B, as an example, θ is drawn as 90 degrees, but it may be 45 degrees, 60 degrees, etc., and is not limited.

  As shown in FIG. 4, the control device 5 controls the driving speed and direction of the electric motor 13 to control the moving speed control means 5A for controlling the moving speed of the mandrel 6 in the axis X direction, the driving speed of the geared motor 9, Rotation speed control means 5B that controls the rotation speed of the mandrel 6 by controlling the direction, sending speed control means 5C that controls the driving speed and direction of the electric motor 20 to control the sending speed of the wire 3, and driving exit / retreat means 29 Desired control using a curvature adjustment control means 5D for controlling the perspective position of the seventh guide roller 22 with respect to the axis X by controlling the driving speed and direction, and one or more of these control means 5A to 5D. Desired control means 5E for performing

  Now, the winding action of the wire 3 by the wire winding device A will be described. In the state where the bed 10 is located on the right side of the wire supply mechanism 4 in FIG. 4, the electric motor 13 and the geared motor 9 are driven to rubber hose. The wire (hard steel wire) 3 from the wire supply means W is bent by moving the mandrel 6 fitted with 1 in the direction of arrow B while rotating in the direction of arrow D and operating the wire supply mechanism 4. Is smoothly wound around the rubber hose 1 from the small-diameter side end 1a toward the large-diameter side end 1b. FIG. 4 shows a state after a while after the start of winding.

  At the time of winding the wire 3, the desired control means 5E functions so that, for example, the incident angle maintenance control means e1 and the winding speed maintenance means e2 are exhibited. The incident angle maintaining control means e1 performs a winding step of winding the wire 3 around the rubber hose 1 while keeping the winding incident angle α of the wire 3 around the hose outer peripheral surface 1c as viewed in the axial center X direction of the rubber hose 1 constant. Yes, the winding speed maintaining means e2 makes the winding speed of the wire 3 around the rubber hose 1 constant.

  That is, specifications data such as the length of the rubber hose 1 fitted to the mandrel 6 and the diameters of the small-diameter side end and the large-diameter side end are stored in advance and are translated in the axial direction X while rotating. The position of the seventh guide roller 22 is adjusted and controlled based on the diameter of the rubber hose 1 when it passes through the wire supply mechanism 4 (the diameter at the winding start point s), so that the winding incident angle α is constant. The incident angle maintenance control means e1 functions so as to maintain the value. And the winding speed of the wire 3 around the rubber hose 1 by variably controlling the feeding speed of the wire 3 or the rotational speed of the rubber hose 1 based on the diameter when the rubber hose 1 passes through the wire supply mechanism 4. The winding speed maintaining means e2 functions so that is maintained constant. That is, the winding speed maintaining means e2 keeps the winding speed constant by changing the rotational speed of the rubber hose 1 in the wire winding direction in synchronization with the diameter of the portion of the rubber hose 1 where the wire 3 is wound. It is means.

  The desired control means 5E also includes a winding pitch variable control means e3 that gradually decreases as the winding pitch P of the wire 3 approaches the large diameter side end 1b from the small diameter end side 1a. That is, as shown in FIG. 6, the moving speed control means 5A, etc., so that the winding pitch P at the start of winding of the small diameter side end 1a is 30 mm and the winding pitch P of the large diameter side end 1b is 20 mm. It is the control that makes the function. At the time of execution of the desired control means 5E that performs these three control means, the wire push-out device 4A and the rotation mechanism 2A are controlled, the rotation speed of the rubber hose 1 in the wire winding direction (arrow D direction), the wire Speed tuning control means e4 that synchronizes the feed speed for winding 3 around the rubber hose 1 also functions. This is effective when the moving speed of the rubber hose 1 in the direction of the axis P is sufficiently slower than the rotational speed. However, if the moving speed is so high that it cannot be ignored due to a large winding pitch P, etc. Control is performed in consideration of the wire 3 sending speed component according to the moving speed.

  The winding conditions of the wire 3 according to Example 1 are as follows: the minimum winding diameter is 126.8 mm, the maximum winding diameter is 161.3 mm, and the rubber hose 1 has a minimum inner diameter of 104 mm and a wall thickness of 5.5 mm. When the winding speed of the wire 3 is 50 m / min, the rotation speed of the mandrel 6 is 125. At the small diameter side end 1a, the inner diameter is 122 mm and the thickness changes between 7 mm. 7 rpm and 98.6 rpm at the large-diameter side end 1b.

  FIG. 6 shows a docking hose 30 as an example of a product using the rubber hose 1 around which the wire 3 is wound by the wire winding apparatus A. As shown in FIG. 6, the docking hose 30 is a high-pressure rubber hose having a multilayer structure in which fittings 31 and 32 are fitted at both ends, and between the inner rubber 7 and the outer rubber 33 made of synthetic rubber or natural rubber. Further, the inner and outer double-layer fiber reinforcing layers 8 and 8, the intermediate rubber layer g, the reinforcing spiral wire 3 formed by spirally winding the wire, and the fiber reinforcement including the steel cord. The layer 34 is configured as a multilayer hose in which the layers 34 are arranged in an embedded state in order from the inner diameter side to the outer diameter side.

  Each of the fiber reinforcing layers 8 and 34 is formed by spirally winding a steel cord covered with rubber (rubber having the same quality as the inner surface rubber 7 and the outer surface rubber 33). Further, the rubber hose 1 is formed by the unvulcanized inner rubber 7, the unvulcanized fiber reinforcing layers 8 and 8, and the unvulcanized intermediate rubber layer g. Thus, the docking hose 30 used for the piping line of a concrete pump car is a high-pressure rubber hose in which the reinforcing spiral wire 3 and the fiber reinforcing layers 8 and 34 are embedded and disposed in a thick intermediate portion.

  The docking hose 30 is formed in a tapered cylindrical portion 30t whose cross-sectional area of the internal flow path 30R changes with the hose length over its entire length (about 3 m). That is, the inner diameter of the upper end of the flow path (the upper end of the upper end fitting 31) is 122 mm (≈5 inches), and the inner diameter of the lower end of the flow path (the end of the lower end fitting 32) is 104 mm (≈4 inches). A gentle taper is attached. The thickness of the inner rubber 7 is set to 7 mm at the upper end of the flow path and 5.5 mm at the lower end of the flow path. For reference, an example of the winding diameter of the reinforcing spiral wire 3 is set to 16.8 mm at the minimum on the small diameter side and 161.3 mm at the maximum on the large diameter side.

  This is a configuration adapted to the actual situation that the rubber hose whose inner diameter is tapered so that the inlet side has a large diameter and the outlet side has a small diameter has a large damage to the inner rubber on the raw-container inflow side and is small on the outlet side. This contributes to improving the strength and durability of the docking hose 30. Further, the arrangement pitch P of the reinforcing spiral wires 3 that are hard steel wires is narrowed from the small diameter side to the large diameter side of the tapered cylindrical portion 30 t over the entire length of the docking hose 30. That is, the arrangement pitch P is 20 mm at the upper end of the flow path and 30 mm at the lower end of the flow path, and the arrangement pitch P is gradually changed between them.

  As described above, the wire winding method using the wire winding apparatus A according to the present invention has the following advantages. In the conventional means of winding a rubber hose using a wire unwound from a bobbin or a wire previously wound in a coil shape, as shown in FIG. 7, when the mandrel 6 (the rubber hose 1) rotates at a high speed When the winding incident angle α of the wire 3 becomes shallow (small) and the amount of biting into the unvulcanized rubber g (rubber hose) 1 becomes large (over biting wire 3z), or when the wire 3 rotates at low speed, The winding incident angle α becomes deeper (larger), and there is a disadvantage that the amount of biting into the unvulcanized rubber g (rubber hose) 1 is small (the biting insufficient wire 3y).

  On the other hand, in the product of the present invention, even if the rotation speed of the mandrel 6 changes, the wire supply speed is changed accordingly, and the incident angle maintenance control means e1 (desired control means 5E) functions, and the rubber hose of the wire 3 Since the winding incident angle α with respect to 1 is maintained at a constant value, the amount of biting of the wire 3 into the rubber hose 1 is maintained constant or within an appropriate range, and the wire 3 can be wound in a stable state. is there. That is, the wire 3 sent in a straight line from the wire push-out device 4A is bent so that the curvature gradually decreases by the first to seventh guide rollers 16 to 22, and the wire 3 is wound around the winding portion s of the rubber hose 1. The position of the seventh guide roller 22 located near the axis X is adjusted according to the winding diameter (the diameter of the rubber hose 1).

  Note that the control for making the winding speed (rotational peripheral speed) and the winding incident angle α constant at the winding location s is calculated from various data of the rubber hose 1 stored in the control device 5 in advance by calculation. For example, the detection information of the detection means such as a position detection sensor or a rotation speed detection sensor in the axial center X direction with respect to the wire supply mechanism 4 of the rubber hose 1 can be performed. Based on the above, it is also possible to adopt means for performing feedback control of changing the rotation speed of the geared motor (which may be a frequency control motor or a servo motor) 9. What is important is that the winding incident angle α of the wire 3 with respect to the rubber hose 1 and the winding speed are kept constant even if the winding diameter changes.

[Another Example]
The unvulcanized rubber hose around which the wire 3 is wound may be a multi-step type in which a portion having a constant outer diameter changes a plurality of times or many times, or a constant diameter over the entire length. For example, it is possible to wind a multi-stage rubber hose by changing the winding pitch P for each diameter, to wind at a constant pitch regardless of the diameter change, or to gradually increase or decrease the winding pitch on the constant diameter rubber hose. Winding is possible.

Front view of wire supply mechanism Left side view of FIG. Right side view of FIG. System diagram showing the principle structure of the wire winding device (A) Conceptual diagram showing the winding status of the wire, (b) Diagram defining the winding incident angle Sectional drawing which shows the structure of the docking hose manufactured using the wire winding apparatus Partial sectional view showing an example of a defect in conventional wire winding

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rubber hose 1c Hose outer peripheral surface 2 Drive mechanism 3 Wire 4 Wire supply mechanism 4C Curvature adjustment apparatus 4D Incident angle maintenance means 22 Guide tool e4 Speed tuning control means s The place where the wire in a rubber hose is wound A Wire winding apparatus Y Pre-bending means X Shaft center α Wound incident angle

Claims (12)

A method of winding a reinforcing wire spirally around an unvulcanized rubber hose,
A wire winding method for a rubber hose, comprising a winding step of winding the wire around the rubber hose while maintaining a constant winding incident angle of the wire with respect to the outer peripheral surface of the hose as viewed in the axial direction of the rubber hose.   2. The wire according to claim 1, further comprising a pretreatment step of giving the wire a bending rod in the same direction as a bending direction when the wire is wound around the rubber hose, and performing the winding step after the pretreatment step. Rubber hose wire winding method.   The method for winding a wire of a rubber hose according to claim 2, wherein, in the pretreatment step, the curvature of the bending rod is changed to be large or small in synchronism with the diameter of the rubber hose.   The method for winding a wire of a rubber hose according to any one of claims 1 to 3, wherein a winding speed of the wire around the rubber hose is constant.   5. The rubber hose according to claim 4, wherein the winding speed of the rubber hose is made constant by changing the rotation speed of the rubber hose in the wire winding direction in synchronization with the diameter of the portion of the rubber hose where the wire is wound. Wire winding method.   The method for winding a wire of a rubber hose according to claim 1 or 2, wherein a rotation speed of the rubber hose in a wire winding direction is synchronized with a feed speed for winding the wire on the rubber hose. A drive mechanism that supports a rubber hose and is capable of driving and rotating laterally in the direction of the rotation axis, and a wire supply mechanism that can feed and supply a reinforcing wire, and the wire fed from the wire supply mechanism is A rubber hose wire wrapping device configured to wind a reinforcing wire spirally around an unvulcanized rubber hose by being wound around a rubber hose that is supported by a drive mechanism and rotates and moves laterally. ,
The wire supply mechanism is a wire winding device for a rubber hose, which has an incident angle maintaining means for maintaining a constant winding incident angle of the wire with respect to the outer peripheral surface of the hose as viewed in the rotational axis direction of the rubber hose.   The wire supply mechanism has a pre-bending means for giving the wire a bending rod in the same direction as the bending direction when the wire is wound around the rubber hose, and the bending rod is given by the pre-bending means. The wire winding apparatus for a rubber hose according to claim 7, wherein the wire is wound around the rubber hose through the incident angle maintaining means.   9. The wire winding device for a rubber hose according to claim 8, wherein the pre-bending means is configured to be able to change the curvature of the bending rod in accordance with the diameter of the rubber hose.   Around the rubber hose that is supported by the drive mechanism, a guide tool that abuts the wire that is fed out and forcibly bends its feeding direction can be adjusted and held in the radial direction of the rubber hose. The incident angle maintaining means is configured by providing a curvature adjusting device which is provided and is movable depending on a diameter of a portion of the rubber hose around which a wire is wound. Rubber hose wire winding device.   The drive mechanism can maintain the winding speed of the wire around the rubber hose constant by changing the rotation speed of the rubber hose in synchronization with the diameter of the portion of the rubber hose around which the wire is wound. The wire winding apparatus of the rubber hose as described in any one of Claims 7-10 comprised. The speed tuning control means for varying the wire feeding speed by the wire feeding mechanism in synchronization with the rotational speed of the rubber hose in the wire winding direction by the drive mechanism is provided. The wire winding apparatus of the rubber hose as described in the item.

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