JP2006150879A - Core material pitch varying method of fiber reinforced cord and manufacturing method of fiber reinforced rubber hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a core material pitch varying method improved so as to be capable of varying the core material pitch in the fiber reinforced cord in a state made as uniform as possible in a direction arranging in a row. <P>SOLUTION: In the core material pitch varying method, a pitch variable roll R, wherein a right-hand male screw like forward ridge spiral 1 and a left-hand male screw like reverse ridge spiral 2 are formed on the outer peripheral surface of a roll member (r) in adjacent relationship, is prepared and a wide belt like fiber reinforced cord 5, which is formed by coating a plurality of core materials 3 arranged in parallel with a rubber 4 is wound around the pitch variable roll R in a heated state to be relatively slid and fed while the winding angle to the pitch variable roll R is controlled so as to be allowed to follow the feed distance of the fiber reinforced cord 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, a flat fiber reinforced cord formed by coating a plurality of core members arranged in parallel with rubber is spirally wound around the outer peripheral surface of a cylindrical rubber having a tapered portion, and the outer periphery of the cylindrical rubber is The present invention relates to a method for manufacturing a fiber reinforced rubber hose for forming a fiber reinforced layer, and a method for changing a core pitch of a fiber reinforced cord for creating a trapezoidal fiber reinforced cord generated in the process of manufacturing the fiber reinforced rubber hose.

  The above-mentioned fiber reinforced cord is a wide belt shape in which a plurality of core members are arranged in a row, that is, in a parallel state and covered with rubber, and this is wound around a cylindrical rubber having a tapered portion. A fiber-reinforced rubber hose is formed by vulcanization. This fiber-reinforced rubber hose is used as, for example, a pumping tube of a squeeze pump. The pumping tube is required to have flexibility and strength that can withstand frequent deformation, and higher pressure resistance is required on the discharge side.

  In other words, it is necessary to gradually change the core material pitch in the pumping tube so that the core pitch is wide on the suction side with a large diameter and the core pitch is narrow on the discharge side with a small diameter, The fiber reinforced rubber hose used for this is required to have its core material pitch gradually changed. Further, some fiber-reinforced rubber hoses used for other applications have a core material pitch that is inversely proportional to the size of the diameter.

  Conventionally, as a method of changing the core pitch of this type of fiber reinforced cord and a method of manufacturing a fiber reinforced rubber hose made using the same, those disclosed in Patent Document 1 are known. The core pitch in a fiber reinforced cord with a flat cross-sectional shape is obtained by joining each of a plurality of cores arranged in a row after rubber coating, and then merging and changing the width of the guide for joining the cores And a technique for changing the full width. Also disclosed is a technique of creating a fiber reinforced rubber hose by controlling the width dimension to a predetermined value by the guide and then winding the flat belt-like fiber reinforced cord around the outer periphery of the cylindrical rubber.

However, the technique disclosed in Patent Document 1, that is, the method of changing the core material pitch by changing the guide width has a problem that the core material pitch tends to be non-uniform. In other words, the overall width of a plurality of rubber-coated cords arranged in parallel is a method of narrowing the overall width using guides that act only on the left and right ends, thereby reducing the core pitch, and at the left and right ends, The pitch of the adjacent core material is narrowed well, but the pitch of the adjacent core material is not so much narrowed in the left and right center portions where the influence of the guide is difficult to be affected, and as a result, the core material pitch may vary in the width direction. This is because it is easily predicted.
JP 2004-106223 A

  The object of the present invention is to improve the core pitch of the fiber reinforced cord so that the pitch between the adjacent cores in the fiber reinforced cord can be varied in the parallel direction as uniform as possible in view of the above situation. The object is to provide a variable method and a method of manufacturing a fiber reinforced rubber hose using the trapezoidal fiber reinforced cord produced thereby.

  According to the first aspect of the present invention, in the core material pitch varying method of the fiber reinforced cord, a right male screw-shaped normal protrusion spiral 1 and a left male screw-shaped reverse protrusion spiral 2 are formed on the outer peripheral surface of the sliding contact member r. A pitch variable tool R formed side by side is prepared, and a wide belt-shaped fiber reinforced cord 5 formed by coating a plurality of core members 3 arranged in parallel with rubber 4 is heated while the pitch variable tool R is heated. The winding angle of the pitch variable tool R is controlled depending on the transport distance of the fiber reinforced cord 5.

  The invention according to claim 2 is the fiber reinforced cord core material pitch varying method according to claim 1, wherein the pitch varying tool R is formed as a right male screw on the outer peripheral surface of the roll member which is the sliding member r. A pitch variable roll is used, in which the normal protrusion spiral 1 and the left male thread-like reverse protrusion spiral 2 are formed adjacent to each other.

  According to a third aspect of the present invention, there is provided the fiber-reinforced cord core variable pitch method according to the second aspect, wherein the pitch variable roll R has a pitch of the normal protrusion spiral 1 and the reverse protrusion spiral 2 as the roll member. A pitch variable structure having a larger outer side in the width direction of r is used.

  According to a fourth aspect of the present invention, in the core material pitch variable method of the fiber reinforced cord according to the second or third aspect, when the fiber reinforced cord 5 is wound around the pitch variable roll R and slides, the pitch is changed. The variable roll R is rotated.

  The invention according to claim 5 is the fiber reinforced cord core variable pitch method according to any one of claims 2 to 4, wherein the upper side and the lower side in the conveying direction of the fiber reinforced cord 5 with respect to the pitch variable roll R. The guide roller 11 is disposed on at least one side of the guide roller 11, and the fiber reinforced cord 5 is slid over the variable pitch roll R and the guide roller 11. The winding angle of the fiber reinforced cord 5 around the variable pitch roll R is changed by moving the variable roll R and relatively changing the angular position of the guide roller 11 with respect to the axis X of the variable pitch roll R. It is characterized by doing.

  The invention according to claim 6 is the fiber-reinforced cord core variable pitch method according to claim 5, wherein the pitch variable rolls R have the pitches of the forward and reverse protruding spirals 1, 2, 31, and 32 mutually different. Different first and second variable rolls R1 and R2 are prepared in a state where the first variable roll R1 having a large pitch is positioned on the upper side in the transport direction of the fiber reinforced cord with respect to the second variable roll R2 having the small pitch. The winding angle of the fiber reinforcement cord 5 to each of these variable rolls R1, R2 is individually changed and adjusted.

  The invention according to claim 7 is the fiber guide cord variable method according to claim 6, wherein the first guide roller 11a is located on the upper side in the conveying direction of the fiber reinforcement cord 5 with respect to the first variable roll R1. And a second guide roller 11b positioned on the lower side in the conveying direction of the fiber reinforcing cord 5 with respect to the second variable roll R2, and moving the first guide roller 11a or the first variable roll R1 to The angular position of the first guide roller 11a with respect to the axis X1 of the first variable roll R1 is changed, and the second guide roller 11b or the second variable roll R2 is moved to move the second guide roller 11b to the second position. Control is performed such that the angular position of the variable roll R2 with respect to the axis X2 is changed.

  The invention according to claim 8 is the fiber reinforced cord core variable pitch method according to claim 7, wherein the fiber reinforced cord 5 is pierced across the first variable roll R1 and the second variable roll R2. It is characterized by being arranged in a state of being hung.

  The invention according to claim 9 is the fiber reinforced cord core material pitch varying method according to any one of claims 1 to 8, wherein a plurality of cores arranged in parallel as the fiber reinforced cord 5 in a heated state. The fiber reinforcement cord 5 immediately after being taken out from the rubber coating apparatus C for producing the wide belt-like fiber reinforcement cord 5 by covering the material 3 with the rubber 4 is used.

  The invention according to claim 10 is a method for producing a fiber reinforced rubber hose, wherein the fiber reinforced cord 5T obtained by the fiber reinforcing cord core pitch changing method according to any one of claims 1 to 9 is replaced with a cylindrical rubber. The fiber reinforcing layer 17 is formed on the outer periphery of the cylindrical rubber 14 by being wound spirally around the outer peripheral surface of the cylindrical rubber 14.

  The invention according to claim 11 is the method for manufacturing a fiber reinforced rubber hose according to claim 10, wherein the side of the fiber reinforced cord 5T having a smaller core material pitch is wound around the smaller diameter side of the cylindrical rubber 14, and the core material pitch is increased. The large side is wound around the large diameter side of the cylindrical rubber 14.

  According to a twelfth aspect of the present invention, in the method for manufacturing a fiber reinforced rubber hose, the fiber reinforced rubber hose 16 obtained by the method for manufacturing a fiber reinforced rubber hose according to the eleventh aspect is used for the pumping tube 19 in the squeeze pump 18. It is what.

  According to the first aspect of the present invention, there is provided a method for changing the core material pitch by sliding the wide surface of the fiber reinforced cord on the pitch variable tool, and the forward and reverse protrusions formed on the core material pitch variable tool. Since the spiral acts on the entire width of the fiber reinforced cord, a force for reducing or expanding the core material pitch over the entire width of the fiber reinforced cord is applied from the protruding spiral. Accordingly, a force for changing the arrangement pitch (core material pitch) is applied to any of the plurality of core materials of the fiber reinforced cord, and the core material pitch is evenly or substantially uniformly distributed over the entire width of the fiber reinforced cord. It becomes possible to change the width. This is clearly superior to the method in which the force for narrowing the width only at both ends of the fiber reinforced cord is applied by the guide means (the above-mentioned Patent Document 1).

  And by changing the sliding length between the pitch variable tool and the fiber reinforced cord, the change rate (reduction rate, enlargement rate) of the core material pitch of the fiber reinforced cord can be changed, and the winding angle of the fiber reinforced cord can be changed. If it is changed depending on the transport distance, the core material pitch can be gradually changed (gradually increased or gradually decreased) with respect to the length of the fiber reinforced cord. As a result, it is possible to create a fiber reinforced cord of a desired shape, such as a trapezoidal fiber reinforced cord that exhibits a trapezoidal shape in a plan view that is suitable for use as a fiber reinforced rubber hose by being wound around the outer periphery of a cylindrical rubber having a tapered portion. become. As a result, it is possible to provide an improved method of changing the pitch of the core material of the fiber reinforced cord so that the pitch between the adjacent core materials in the fiber reinforced cord can be varied in a parallel direction as much as possible.

  In this case, if a pitch variable roll is used as the pitch variable tool as in claim 2, the sliding portion with the fiber reinforced cord becomes an arc shape, and the protruding spiral and the fiber reinforced cord slide more smoothly. There is an advantage that the variable operation of the core material pitch is stabilized. Further, in the method of expanding and contracting the plurality of core material pitches around the left and right center as a whole, the amount of movement increases as the outer one on the left and right of the plurality of core materials. If a pitch variable roll is used in which the pitch of the ridge spiral increases toward the outer side in the left-right direction with respect to the conveyance direction of the fiber reinforced cord, the width direction biasing force suitable for the amount of movement of the core material depending on the left and right position is applied to the fiber reinforced cord. It is possible to provide the function and effect of the invention of claim 1 or 2 more smoothly.

  According to the invention of claim 4, the pitch variable roll is configured to be rotatable, that is, to be rotatable in the forward direction and the reverse direction, and will be described in detail in the embodiment. In particular, if the sliding length with the fiber reinforced cord, that is, reduction, the winding angle can be changed and adjusted. That is, the function of the winding angle changing means can be exhibited by driving and rotating the pitch variable roll, and the core is subordinate to the transport distance of the fiber reinforced cord without providing another winding angle changing means. It is possible to supplement the control of changing the material pitch and the function of the winding angle changing means, and the core material of the fiber reinforced cord in which the effect according to the invention of claim 2 or 3 can be obtained rationally and economically A pitch variable device can be provided.

  According to the invention of claim 5, the angular position of the guide roller relative to the axis of the pitch variable roll is relatively changed by moving the pitch variable roll or the guide roller arranged adjacent to the pitch variable roll. In addition, by laying fiber reinforced cords across the pitch variable roll and the guide roller, it is possible to increase the range of change in the winding angle of the pitch variable roll while maintaining a compact structure as a whole, and to change the core material pitch It is possible to provide a method for changing the core pitch of a fiber reinforced cord capable of producing a fiber reinforced cord having a high rate.

  And as invention of Claim 6, as a pitch variable roll, the 1st variable roll with a large protrusion spiral pitch, and the 2nd variable with a small protrusion spiral pitch arrange | positioned at the lower side in the conveyance direction of this If the rolls are prepared and the wrapping angles of both variable rolls are individually changed and adjusted, the core material pitch of the fiber reinforced cord can be changed stepwise (smoothly) without difficulty, or the first variable Various change behaviors can be set, such as a large change in the roll and fine adjustment in the second variable roll, and an advantage of excellent usability as an apparatus can be obtained. As a specific method in this case, as in the invention of claim 7, two variable rolls are arranged next to each other, and guide rollers are arranged on the front and rear sides (upper side and lower side in the conveying direction), respectively. An effective core material pitch can be varied while maintaining the number of parts. Furthermore, if the fiber reinforced cord is routed between the first variable roll and the second variable roll as in the invention of the eighth aspect, the fiber reinforced cord for both the variable rolls can be saved while saving space. There is an advantage that a large change range of the winding angle can be obtained.

  According to the ninth aspect of the present invention, as the fiber reinforcement cord, the one immediately after coming out of the rubber coating apparatus in which the coated rubber is processed in a high temperature state is used. In this state, the pitch variable roll is subjected to the action, and the core material pitch is changed smoothly by compressing or expanding the rubber part in the left-right direction. As a result, it is possible to provide an economical and rational method for changing the core pitch of the fiber reinforced cord, which can obtain the high temperature state of the coated rubber advantageous for changing the core pitch without requiring a dedicated heating means. It was.

  According to invention of Claim 10, the fiber reinforced rubber hose which has a taper part is spirally wound around the cylindrical rubber which has a taper part about the fiber reinforcement cord by which the core material pitch was changed into the desired state. A method for producing a fiber-reinforced rubber hose that can be produced is obtained. In this case, if the core pitch is changed and immediately wound around the cylindrical rubber, the fiber reinforced cord that is still in a high temperature state is wound around the cylindrical rubber, and a dedicated heating means is provided. The integration of both can be promoted economically.

  As in claim 11, the fiber reinforced cord is wound around the small diameter side of the cylindrical rubber on the side with the smaller core material pitch and the large diameter side of the cylindrical rubber with the side with the larger core material pitch. For example, a method for producing a fiber reinforced rubber hose can be obtained that can produce a fiber reinforced rubber hose having the characteristics that the thinner the diameter, the higher the strength and the ability to withstand high pressure. This can be provided as a manufacturing method of a fiber reinforced rubber hose suitable for a pumping tube in a squeeze pump as in the twelfth aspect.

  Below, the form of the core material pitch variable method of the fiber reinforced cord by this invention and the manufacturing method of a fiber reinforced rubber hose is demonstrated, referring drawings. FIG. 1 is a schematic view of the whole manufacturing apparatus of a fiber reinforced rubber hose, FIG. 2 is a plan view of a main part of a core pitch varying device, FIG. 3 is an operation diagram showing the principle of a winding angle changing means, and FIGS. It is a figure regarding a fiber reinforced cord and a fiber reinforced rubber hose. FIG. 10 shows a squeeze pump, and FIGS. 11 to 15 show various other embodiments.

[Example 1]
The fiber reinforced rubber hose manufacturing method according to the first embodiment is a method of manufacturing the fiber reinforced rubber hose 16 used as the pumping tube 19 of the squeeze pump 11 shown in FIG. In order to easily understand the functions required for the fiber reinforced rubber hose 16, first, the squeeze pump 11 will be briefly described.

  As shown in FIG. 10, the squeeze pump 11 includes a pumping tube 19 that is partially bent along the inner periphery of the drum 37, and a roller 36 that is pivotally supported at both ends. And a rotor 38 that rotates in the direction of arrow E. A hopper 39 is provided at the proximal end of the suction side end 19a of the pumping tube 19, and a discharge side end 19b of the pumping tube 19 is provided. The transport tubes 40 are connected to each other.

  The pumping tube 19 made of the fiber reinforced rubber hose 16 is tapered over the entire length so that the diameter on the suction side is large and the diameter on the discharge side is small, and is fitted to the pumping tube suction side end 19a. When the rotor 38 is driven and rotated in the direction indicated by the arrow E while the ready-mixed concrete transported from the mixer truck or the like is accommodated in the combined hopper 39, the roller 36 presses the pumping tube 19 and compresses the cross-sectional area thereof. As the tube is rotated upward, the tube pressing portion is moved in the circumferential direction, and the pressure is increased while increasing the pressure of the ready-mixed concrete in the tube by gradually reducing the cross-sectional area of the taper portion 13 of the fiber reinforced rubber hose 16, and discharged from the discharge side end portion 19b. Will come to do. Therefore, the pumping tube 19 is required to have flexibility and strength that can withstand frequent deformation, and higher pressure resistance is required on the discharge side.

  Next, a method for manufacturing a fiber-reinforced rubber hose will be described. The fiber-reinforced rubber hose 16 used as the pumping tube 19 of the squeeze pump is produced by the following manufacturing apparatus Z. That is, the fiber-reinforced rubber hose manufacturing apparatus Z is generally configured to include a rubber coating apparatus C, a fiber-reinforced cord core material pitch varying apparatus A, and a winding apparatus B as shown in FIG. Among these, the rubber coating device C and the winding device B, which are publicly known devices, will be briefly described, and the core material pitch varying device A, which is a main part of the invention, will be described in detail.

  The rubber coating apparatus C passes a plurality of steel cords (an example of a core material) 3 arranged in parallel through the rubber coating apparatus C, and the plurality of steel cords 3 are covered with the rubber 4, and the cross-sectional shape is flat. A flat belt-like (see FIG. 3 etc.) fiber reinforced cord 5 is formed and discharged. That is, a plurality of core members 3 arranged in parallel are covered with rubber 4 to create a wide belt-like fiber reinforced cord 5 with rubber coating device C, and the created fiber reinforced cord 5 is a fiber reinforced cord carry-out port. 20 is discharged toward the core material pitch varying device A. Incidentally, the rubber coating apparatus C composed of an extruder, etc., not shown is attached to a known technique, and further detailed explanation is omitted. As the core material 3, various materials such as steel cordno, high strength synthetic resin fiber, carbon fiber and the like can be used.

  The core material pitch varying device A is a flat and constant width fiber reinforced cord 5 fed from the rubber coating device C, and the arrangement pitch P of the steel cord 3 is increased or decreased in proportion to the feeding length (conveyance distance). It is an apparatus for forming a trapezoidal fiber reinforced cord 5T that is substantially trapezoidal in a plan view in which the entire width is variable by being gradually changed. The trapezoidal fiber reinforced cord 5T is an intermediate product for winding the tubular rubber hose 14 to form the fiber reinforced rubber hose 10 for the above-described pumping tube. In the present manufacturing apparatus A, it is immediately wound around the cylindrical rubber hose 14, but the trapezoidal fiber reinforced cord 5T is temporarily stored and then transported to a winding apparatus B in a remote place or other factory. Is also possible.

  Now, the core material pitch varying device A is provided on the outer peripheral surface of an inlet portion 6 into which the fiber reinforcing cord 5 immediately after being discharged from the rubber coating device C can be taken in, and a cylindrical roll member (an example of a sliding member) r. The right male screw-shaped forward protruding spiral 1 and the left male screw-shaped reverse protruding spiral 2 were taken in from the first and second variable pitch rolls R1, R2 formed adjacent to each other and the inlet portion 6. A winding mechanism 8 that winds the fiber reinforced cord 5 around the variable pitch roll R and slides the fiber reinforced cord 5 relative to the outlet 7 and the winding angle of the fiber reinforced cord 5 around the pitch variable roll R can be changed and adjusted. The winding angle changing means 9 and the control device 10 are provided.

  The pitch variable roll R includes first and second variable rolls R1 and R2, and the first and second variable rolls R1 and R2 are respectively rotatable to the left and right frame plates 21 and 21 so as to be rotatable about the axis X1 and X2. The first guide roller 11a is on the upper side in the conveying direction of the fiber reinforced cord 5 with respect to the first variable roll R1, and the lower side in the conveying direction of the fiber reinforced cord 5 with respect to the second variable roll R2. The second guide rollers 11b are supported by the left and right frame plates 21 and 21, respectively, so as to be rotatable. Each of the guide rollers 11a and 11b is formed in a substantially pulley shape having a large diameter portion 23 formed on the left and right ends of the guide portion 22 and having an axis P.

  As shown in FIGS. 1 and 2, the first guide roller 11 a is moved up and down so that the rotation shaft 26 can be moved up and down along a long hole 12 a formed vertically in the left and right frame plates 21 and 21. The moving mechanism 27 is configured to be movable up and down and to be maintained. Thereby, the 1st moving mechanism E1 which can move the 1st guide roller 11a in the direction in which the angular position with respect to the axial center X1 of the 1st variable roll R1 of the 1st guide roller 11a is changed is comprised.

  As shown in FIG. 3A, when the first guide roller 11a is positioned at the upper end of the long hole 12a (position indicated by the solid line), the winding angle of the fiber reinforced cord 5 in the first variable roll R1 Is θU, and when the first guide roller 11a is located at the lower end of the long hole 12a (position indicated by the phantom line), the winding angle of the fiber reinforced cord 5 in the first variable roll R1 is θS ( θU> θS). Therefore, the winding angle θ1 of the fiber reinforced cord 5 around the first variable roll R1 is adjusted and set in the range of θU ≧ θ ≧ θS by the up and down movement of the first guide roller 11a by the operation of the first moving mechanism E1. Can do.

  As shown in FIG. 1, the second guide roller 11 b has a front-rear moving mechanism 29 that allows the rotation shaft 28 to move back and forth and maintain along a long hole 12 b that is formed in the left and right frame plates 21, 21. Therefore, it can be moved back and forth and maintained. Thereby, the 2nd moving mechanism E2 which can move the 2nd guide roller 11b in the direction in which the angular position with respect to the axial center X2 of the 2nd variable roll of the 2nd guide roller 11b is changed is comprised.

  The handling mechanism 8 includes first and second guide rollers 11a and 11b, first and second variable rolls R1 and R2, and left and right frame plates 21 and 21 that support them. Further, on the rear side of the second guide roller 11b, a third guide roller 30 for determining the height position of the trapezoidal fiber reinforcing cord 5 provided from the core material pitch varying device A is rotatably supported on the frame plates 21 and 21. Has been. The fiber reinforcement cord 5 is routed between the three guide rollers 11a, 11b, 30 and the two adjacent adjacent ones of the two variable rolls R1, R2. 11b and 30 and the variable rolls R1 and R2 have sufficient winding angles.

  The winding angle changing means 9 arranges guide rollers 11a and 11b on the upper side and the lower side in the conveying direction of the fiber reinforcement cord 5 with respect to the first and second variable rolls R1 and R2, and the fiber reinforcement cord 5 The variable rolls R1 and R2 and the guide rollers 11a and 11b are wound so as to be wound around each other, and the angular positions of the guide rollers 11a and 11b with respect to the axial centers X1 and X2 of the variable rolls R1 and R2 are relative to each other. It is configured by providing moving mechanisms E1 and E2 that can move the guide rollers 11a and 11b in the direction to be changed.

  As shown in FIG. 3B, when the second guide roller 11b is located at the front end of the long hole 12b (position indicated by the solid line), the winding angle of the fiber reinforcement cord 5 in the second variable roll R2 Is θM, and the winding angle of the fiber reinforced cord 5 in the second variable roll R2 is θA when the second guide roller 11b is located at the rear end of the long hole 12b (position indicated by the phantom line). (ΘM> θA). Therefore, the winding angle θ2 around the second variable roll R2 of the fiber reinforced cord 5 is adjusted and set in the range of θM ≧ θ ≧ θA by the back-and-forth movement of the second guide roller 11b by the operation of the second moving mechanism E2. Can do.

  As shown in FIGS. 1 and 2, the first variable roll R <b> 1 includes a right male screw-like normal protrusion spiral 1 and a left male screw-like reverse protrusion spiral 2 on the outer peripheral surface of a cylindrical roll member r. Are formed adjacent to each other at the left and right center M, and have a support shaft 24 having an axis X1, and are rotatably supported by the left and right frame plates 21 and 21. A first rotation mechanism K1 is provided that acts on the support shaft 24 to rotate the first variable roll R1 in the forward and reverse directions, that is, in the direction of arrow A or arrow B.

  As shown in FIGS. 1 and 2, the second variable roll R <b> 2 has a right male screw-like normal protrusion spiral 31 and a left male screw-like reverse protrusion spiral 32 on the outer peripheral surface of the cylindrical roll member r. Are formed adjacent to each other at the left and right center M, and have a support shaft 25 having an axial center X2, and are rotatably supported by the left and right frame plates 21 and 21. The screw pitch of these forward and reverse protruding spirals 31 and 32 is set to be smaller than that of the first variable roll R1. A second rotation mechanism K2 is provided that acts on the support shaft 25 to rotate the second variable roll R2 in the forward and reverse directions, that is, in the directions indicated by arrows C and D. That is, the pitch variable roll R includes the first and second variable rolls R1 and R2 having different pitches of the forward and reverse protruding spirals 1, 2 and 31, 32, and the first variable roll R1 having a larger pitch has the pitch. The wrapping angle changing means 9 is configured so as to be positioned on the upper side in the conveying direction of the fiber reinforced cord 5 with respect to the second variable roll R2 which is small, and the wrapping angle changing means 9 individually sets the wrapping angle to each of these variable rolls R1 and R2. It is configured to be freely adjustable.

  As shown in FIGS. 1 and 4, the winding device B includes a rotating shaft 15a on which a cylindrical rubber 14 having a tapered portion 13 can be attached, and a rotating mechanism 15 that can drive and rotate the rotating shaft 15a. And is arranged at a position immediately after the outlet 7 of the core material pitch varying device A. Although not shown in the drawing, the attitude of the winding device B with respect to the outlet 7 to wind the trapezoidal fiber reinforcing cord 5 coming out of the core material pitch varying device A around the cylindrical rubber 14 in a reciprocating spiral shape (sudder shape) ( There is also a posture changing mechanism that changes the orientation. That is, by driving the rotation mechanism 15, the cylindrical rubber 14 externally fitted to the rotation shaft 15 a is rotated in a predetermined direction, and the trapezoidal fiber reinforcement cord 5 can be wound around the outer peripheral portion.

  For these reasons, in the fiber reinforced rubber hose manufacturing apparatus Z, the inlet portion 6 is located in the vicinity of the fiber reinforced cord carry-out port 20 of the rubber coating device C, and the outlet portion 7 is located in the vicinity of the winding device B. Thus, the core material pitch varying device A, the rubber coating device C, and the winding device B are arranged, and the flat belt-like fiber reinforcement cord 5 carried out from the rubber coating device C is used as the core material pitch. By forming the trapezoidal fiber reinforced cord 5T (or the inverted trapezoidal fiber reinforced cord 5T ′) in the variable device A and then spirally winding the outer periphery of the cylindrical rubber hose 14 driven and rotated in the winding device B, A fiber reinforced rubber hose 16 in which a fiber reinforcing layer 17 is formed on the outer periphery of the rubber 14 can be produced.

  As shown in FIG. 1, the first and second moving mechanisms E1, E2, the first and second rotating mechanisms K1, K2, the rubber coating device C, and the rotating mechanism 15 are all connected to the control device 10. , Operation control linked to each other, that is, the winding angles θ1 and θ2 of the reinforcing cord 5 are changed depending on the conveyance distance of the fiber reinforcing cord 5 at the first and second variable rolls R1 and R2 Thus, the handling mechanism 8 and the wrapping angle changing means 9 can be controlled by the control device 10. The hot (high temperature) fiber reinforced rubber cord 5 coming out of the rubber coating apparatus C is slid on the outer peripheral surfaces of the first and second variable rolls R1 and R2 in the hot state, so that the fiber reinforced rubber cord 5 The width of the core material pitch P and the total width W can be gradually increased or decreased.

  By such a control method, the fiber reinforcing cord 5 having a constant core material pitch P and the entire width sent from the rubber coating device C is supplied from the core material pitch varying device A as shown in FIG. It is possible to form a trapezoidal fiber reinforced cord 5T in which P and the entire width gradually change in the longitudinal direction. In FIG. 4, the relationship P1> P2 is formed between the core material pitch P1 of the wide portion and the core material pitch P2 of the narrow portion, and the core material pitch P of the fiber reinforced cord 5 is changed to the first variable. The roll R1 is 10%, the second variable roll R2 is 4%, and so on, and can be reduced in stages using the two variable rolls R1 and R2.

  As an example, in order to create the trapezoidal fiber reinforced cord 5T suitable for making the fiber reinforced rubber hose 10, the following control is performed. That is, in the state where the fiber reinforced cord 5 is conveyed at the speed V, the first variable roll R1 is driven and rotated in the direction of the arrow B in a state where the first circumferential speed v1 is faster than the conveyance speed V, so that the first variable roll The fiber reinforced cord 5 that slides below R1 is brought into a state in which the core material pitch P and the entire width are reduced. Then, the second variable roll R2 is driven to rotate in the direction of arrow C or stops rotating in a state where the second circumferential speed v2 is slower than the conveyance speed V depending on the positions of the normal protrusion spiral and the reverse protrusion spiral. Or by driving and rotating in the direction of the arrow D, the fiber reinforcing cord 5 sliding on the upper part of the second variable roll R2 is brought into a state in which the core material pitch P and the entire width are reduced.

  As described above, the first and second moving mechanisms E1 and E2 are operated in a state where the first and second peripheral speeds v1 and v2 are constant, and the first guide is proportional to the transport length of the fiber reinforced cord 5. The roller 11a is moved upward from the lower end to the upper end of the upper and lower long holes 12a [see FIG. 3 (A)], and the second guide roller 11b is moved to the front and rear long holes 12b in proportion to the transport length of the fiber reinforced cord 5. Move forward from the rear end toward the front end. Then, in any of the first and second variable rolls R1, R2, the winding angle of the fiber reinforcement cord 5 is gradually increased in proportion to the transport length of the fiber reinforcement cord 5, and as a result, the core material pitch P and The reduction ratio of the entire width W is gradually increased in proportion to the conveyance length of the fiber reinforcement cord 5, and the trapezoidal fiber reinforcement cord 5T shown in FIG. 4 is created.

  Then, the trapezoidal fiber reinforcement cord 5T delivered from the outlet portion 7 is spirally wound from the large diameter side of the cylindrical rubber hose 14 driven and rotated by the rotation mechanism 15, so that the core material pitch is increased on the large diameter side. A trapezoidal fiber reinforced cord 5T is formed on the outer peripheral surface of the fiber reinforced rubber hose 16 having the taper portion 13 and the fiber reinforced rubber hose 16 in which the core material pitch P and the total width W become smaller as the P and the entire width W increase. A fiber reinforced rubber hose 16 (see FIG. 9) that is wound spirally and has a fiber reinforcing layer 17 formed on the outer periphery of the cylindrical rubber 14 can be created.

  Further, in order to create the suede-like fiber reinforcement layer 17 by winding the trapezoidal fiber reinforcement cord 5T in a reverse spiral shape, the fiber-reinforced rubber hose in a state where the trapezoidal fiber reinforcement cord 5T is wound once in the forward direction. 16 (see FIG. 9), the trapezoidal fiber reinforcement cord 5T fed from the outlet portion 7 of the core material pitch varying device A is again placed on the large-diameter side by the above-described control. 7 to create a fiber reinforced rubber hose 16 shown in FIG. This means that the trapezoidal fiber reinforced cord 5T delivered from the outlet portion 7 is once cut at the small diameter side end (rear end).

  Alternatively, the following method may be used. That is, in the state where the first and second variable rolls R1 and R2 are rotated under the same conditions as described above, the first guide roller 11a located at the upper end of the upper and lower elongated holes 12a is moved downward toward the lower end, The second guide roller 11b located at the front end of the hole 12b is moved backward toward the rear end to gradually reduce the winding angle of the fiber reinforcing cord 5 in the first and second variable rolls R1, R2, The inverted trapezoidal fiber reinforcement cord 5T ′ (see FIG. 4), in which the core pitch P and the total width W of the fiber reinforcement cord 5 are gradually increased in proportion to the transport length, is continued from the trapezoid fiber reinforcement cord 5T previously created. And is sent out from the exit section 7.

  In the winding device B, when the trapezoidal fiber reinforcement cord 5T is wound to the end on the small diameter side, the posture (direction) is changed to the opposite direction (see the winding device B using the virtual line in FIG. 1). This time, the inverted trapezoidal fiber reinforced cord 5T ′ is spirally wound from the small diameter side of the fiber reinforced rubber hose 16 in the state shown in FIG. 7 from the small diameter side, resulting in the fiber reinforced rubber hose shown in FIG. 16 is created. In this case, it is possible to create the slender fiber reinforcing layer 17 without cutting the fiber reinforcing cord at the boundary between the trapezoidal fiber reinforcing cord 5T and the inverted trapezoidal fiber reinforcing cord 5T '.

  In addition, as a means for recognizing the conveyance length of the fiber reinforced cord 5 in the control device 10, the speed sent from the rubber coating device C, that is, the conveyance speed in the core material pitch varying device A is predetermined and stored, Alternatively, a system may be provided in which a sensor (not shown) for detecting the rotation speed of the first guide roller 11a or the third guide roller 30 is provided, and the conveyance length is obtained from the conveyance speed at any time. Absent.

  In each of the variable rolls R1 and R2, the forward and reverse ridge spirals 1, 2, 31, and 32 are formed adjacent to each other at M with respect to the left and right centers. According to this, if the left and right centers of the fiber reinforced cords 5 are conveyed in accordance with M, just the right and left lateral shifting forces act on each half of the lateral width W (W / 2). Cancel each other and the center position of the left and right is maintained, that is, without using the guide means for guiding the conveying direction of the fiber reinforced cord 5, the core material pitch P and the full width W can be expanded or reduced.

  On the other hand, for example, in the means for changing the core material pitch by using the variable roll in which only the regular protrusion spiral 1 is formed on the entire surface, the force acts only on one side of the fiber reinforced cord 5 in the left-right direction. A side guide that restricts the fiber reinforcing cord 5 from moving laterally in that direction is required. In addition, since frictional resistance is generated by sliding with the side guides, there is a disadvantage that the conveyance of the fiber reinforced cord 5 is easily disturbed or the power must be increased to compensate for the conveyance driving force loss.

  Therefore, according to the variable pitch roll R according to the first embodiment, an excellent structure can be realized in which the conveyance state is neatly maintained and the power loss does not occur while the side guide as a dedicated member is unnecessary. Further, since the fiber reinforcement cord 5 is wound around the first and second variable rolls R1 and R2, the variable action of the core material pitch P acts on both the front and back (or top and bottom) surfaces of the fiber reinforcement cord 5. Therefore, there is an advantage that the core pitch P and the total width W can be varied in a balanced manner and more stably than when acting only on one surface.

[Example 2]
In order to create the trapezoidal fiber reinforcement cord 5T and the inverted trapezoidal fiber reinforcement cord 5T ′ by the core material pitch varying method using the core material pitch varying device A, the following method may be used. Here, the relationship between the conveyance speed V of the fiber reinforcement cord 5 and the core material pitch P and the full width M of the fiber reinforcement cord 5 according to the relationship between the rotation speed and the rotation direction of the pitch variable roll R will be described. As shown in FIG. 1, the fiber reinforced cord 5 has a structure in which the handling mechanism 8 slides at the lower part of the first variable roll R1 and slides at the upper part of the second variable roll R2. At the same time, the forward and reverse protruding spirals 1, 2, 31, 32 of the first and second variable rolls R1, R2 are located in the center M toward the lower side in the transport direction of the fiber reinforced cord 5 in plan view (see FIG. 2). It is the structure formed in the state by.

  Thus, at the peripheral speed v1 of the first variable roll R1 and the conveyance speed V of the reinforcing cord, if the first variable roll is driven and rotated in the direction of arrow B, and the first peripheral speed v1 is constant within that range, The fiber reinforced cord is reduced by a reduction ratio determined by the speed ratio (v1: V), and the core material pitch P and the total width W are constant and the shape in plan view is rectangular. On the other hand, if the first circumferential speed V1 is controlled to be increased in proportion to the transport length of the fiber reinforcement cord 5, the winding angle of the fiber reinforcement cord 5 around the first variable roll R1 is substantially reduced. The core pitch P and the entire width W of the fiber reinforced cord 5 after the sliding are gradually reduced, and the above-mentioned “trapezoidal fiber reinforced cord 5T” can be created.

  Further, if the first variable roll R1 is driven and rotated in the direction of the arrow A and the first circumferential speed v1 is controlled to increase in proportion to the transport length of the fiber reinforced cord 5, the first of the fiber reinforced cord 5 is changed. The winding angle around the variable roll R1 is substantially increased, and the core material pitch P and the full width W of the fiber reinforced cord 5 after the sliding are gradually increased.

  Such a function can be similarly exerted in the second variable roll R2 around which the fiber reinforced cord 5 is wound. That is, if the peripheral speed v2 of the second variable roll is increased in proportion to the conveyance length and driven and rotated in the direction of the arrow C, the core material pitch P and the entire width W of the fiber reinforced cord 5 are reduced, and the direction of the arrow D is increased. If it rotates, the core material pitch P and the full width W of the fiber reinforcement cord 5 will expand.

  That is, by controlling the rotation speed and direction of the first and second variable rolls R1 and R2, the core pitch P and the full width W of the fiber reinforced cord 5 can be reduced and expanded, and the rate of change thereof can be controlled in any way. It is possible to set, and the function of the winding angle changing means 9 can be exhibited without changing the position of the guide rollers 11a and 11b. Of course, the above-described function can be obtained even in a configuration in which only the first variable roll R1 or only the second variable roll R2 is provided.

  As an example, in order to create the trapezoidal fiber reinforced cord 5T suitable for making the fiber reinforced rubber hose 16, the first variable roll R1 is moved in the direction indicated by the arrow B in the state where the fiber reinforced cord 5 is conveyed at the speed V. While rotating and rotating the peripheral speed v1 within a range faster than the transport speed V (V <v1), the second variable roll R2 is in the direction of the arrow C, and the second peripheral speed v2 is slower than the transport speed V. The drive is rotated while adjusting within the range (0 ≦ v2 <V). Then, in proportion to the transport distance (length) of the fiber reinforced cord 5, the first circumferential speed v1 is gradually increased and the second circumferential speed v2 is gradually decreased, so that the core pitch P and the entire width are fibers. As a result, the trapezoidal fiber reinforced cord whose core material pitch P and the entire width are narrowed toward the upper side in the conveying direction of the fiber reinforced cord 5 is narrowed in proportion to the conveyance length of the reinforced cord 5. 5T is sent out. Moreover, it is also possible to create an inverted trapezoidal fiber reinforced cord 5T 'by controlling in the reverse direction.

[Other Examples]
As the pitch variable tool R, as shown in FIG. 11, a pitch variable structure having a pitch variable structure in which the pitches of the normal protrusion spiral 1 and the reverse protrusion spiral 2 become larger in the width direction of the roll member r may be used. . Further, as shown in FIG. 12, the right and left central portions are arranged on the outer periphery of the hourglass-shaped roll member r whose diameter is smaller than both ends, and the normal protruding spiral 1 and the left male threaded reverse protruding spiral 2 are centered in the horizontal direction. Alternatively, the variable roll R formed adjacent to each other may be used. Furthermore, as shown in FIG. 13, it is also possible to use a side-view fan-shaped pitch variable tool R having an undulating arcuate surface e that slides within a predetermined angle range with the fiber reinforced cord 5. Naturally, forward and reverse protruding spirals 1 and 2 are formed on the arc surface.

  As shown in FIG. 14 (A), as the handling mechanism 8, the fiber reinforced cord 5 is passed through the upper part of the first variable roll R1 and is passed through the lower part of the second variable roll R2, that is, It is possible to use the opposite of the configuration shown in FIG. Further, as shown in FIG. 14B, in the handling mechanism 8, the fiber reinforcement cord 5 may be routed by a method other than tapping. Further, as shown in FIG. 15, in the winding angle changing means 9, the guide roller 11 can be freely rotated and maintained around the axis X of the pitch variable roll R by using a swing arm 35 or the like. It is also possible to adopt a method of pivoting to.

  In addition, the fiber reinforcement cord 5 created by the rubber coating apparatus C is temporarily stored, and then immediately before being supplied to the inlet portion 6 of the core material pitch varying apparatus A, the fiber reinforcement cord 5 is appropriately heated. It is also possible to manufacture the substrate by heating it to a high temperature state. Further, a manufacturing method in which the trapezoidal fiber reinforcing cord 5T (or the inverted trapezoidal fiber reinforcing cord 5T ′) formed by the core material pitch varying device A is temporarily stored and then supplied to the winding device B is possible. is there. These methods are suitably implemented when at least one of the rubber coating device C, the core material pitch varying device A, and the winding device B is in another process (another factory, another company, etc.).

  The fiber reinforced rubber hose 16 according to the present invention can be used for various applications such as a fresh concrete pouring docking hose and a fresh concrete pouring tip hose in addition to the above-described pumping tube 19.

Overall view showing a schematic configuration of a fiber-reinforced rubber hose manufacturing apparatus (Example 1) The top view which shows the principal part of a core material pitch variable apparatus (A) and (B) are both operation diagrams showing the principle of the wrap angle changing means. Top view showing trapezoidal fiber reinforced cord (A) is an arrow a view of FIG. 4, (B) is an arrow b view of FIG. Action diagram showing winding state of trapezoidal fiber reinforced cord around cylindrical rubber hose The top view which shows the fiber reinforced rubber hose in the state where the trapezoidal fiber reinforcement cord is wound only in one direction of the outer circumference of the cylindrical rubber Cross section of the fiber reinforced cord immediately after being sent out from the rubber coating device Plan view of manufactured fiber reinforced rubber hose Side view showing schematic structure of squeeze pump The top view which shows the 1st another structure of a pitch variable roll The top view which shows the 2nd another structure of a pitch variable roll Side view showing third alternative structure of pitch variable roll (A), (B) Schematic showing another structure of the handling mechanism Schematic showing another structure of winding angle changing means

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,31 Normal protrusion spiral 2,32 Reverse protrusion spiral 3 Core material 4 Rubber 5, 5T Fiber reinforcement cord 11 Guide roller 11a First guide roller 11b Second guide roller 13 Tapered part 14 Cylindrical rubber 16 Fiber reinforcement rubber hose 17 Fiber reinforced layer 18 Squeeze type pump 19 Pumping tube r Sliding member, roll member A Fiber reinforced cord core material pitch variable device B Winding device C Rubber coating device Z Fiber reinforced rubber hose manufacturing device R Pitch variable tool, pitch variable roll R1 first variable roll R2 second variable roll X axis of pitch variable roll X1 axis of first variable roll X2 axis of second variable roll

Claims (12)

  Prepare a pitch-variable tool in which a right male screw-shaped forward protrusion spiral and a left male screw-shaped reverse protrusion spiral are formed next to each other on the outer peripheral surface of the sliding contact member, and rubber cores are arranged in parallel. A wide belt-shaped fiber reinforced cord coated with a wire is wound around the pitch variable tool in a heated state and conveyed relative to the pitch variable tool, and the winding angle of the pitch variable tool is set to the fiber reinforced cord. A method for changing the pitch of the core material of the fiber reinforced cord controlled depending on the transport distance.   A pitch variable roll in which a right male screw-shaped normal protrusion spiral and a left male screw-shaped reverse protrusion spiral are formed adjacent to each other on the outer peripheral surface of the roll member, which is a sliding member, as the pitch variable tool. Item 2. A method for changing the core pitch of the fiber-reinforced cord according to Item 1.   The core material of the fiber reinforced cord according to claim 2, wherein the pitch variable roll uses a pitch variable structure in which the pitch of the normal protruding spiral and the reverse protruding spiral increases toward the outside in the width direction of the roll member. Pitch variable method.   The core pitch variable method of the fiber reinforced cord according to claim 2 or 3, wherein the pitch variable roll is rotated when the fiber reinforced cord is wound around the pitch variable roll and slides.   A guide roller is provided on at least one of the upper side and the lower side in the conveying direction of the fiber reinforced cord with respect to the pitch variable roll, and the fiber reinforced cord is placed in a staking state across the pitch variable roll and the guide roller. As the rotated state, the guide roller or the pitch variable roll is moved to change the angular position of the guide roller relative to the axis of the pitch variable roll, thereby allowing the fiber reinforced cord to move to the pitch variable roll. The core material pitch variable method of the fiber reinforced cord according to any one of claims 2 to 4, wherein the winding angle is changed.   As the pitch variable roll, the first and second variable rolls having different pitches of the forward and reverse ridge spirals, the first variable roll having a large pitch and the second variable roll having a small pitch are fiber reinforced cords. 6. The fiber reinforcing cord core material pitch varying method according to claim 5, wherein the fiber reinforcing cord core material pitch varying method is prepared so as to be positioned on the upper side in the conveying direction, and the winding angle of the fiber reinforcing cord around each variable roll is individually changed and adjusted.   A first guide roller located on the upper side in the conveying direction of the fiber reinforced cord with respect to the first variable roll; and a second guide roller located on the lower side in the conveying direction of the fiber reinforced cord with respect to the second variable roll. The angular position of the first guide roller with respect to the axis of the first variable roll is changed by moving the first guide roller or the first variable roll, and the second guide roller or the second variable roll is moved. The core material pitch varying method of a fiber reinforced cord according to claim 6, wherein the control is performed so that the angular position of the second guide roller with respect to the axis of the second variable roll is changed.   The core-pitch variable method of the fiber reinforced cord according to claim 7, wherein the fiber reinforced cord is routed in a state of being struck over the first variable roll and the second variable roll.   A fiber reinforcing cord immediately after being taken out from a rubber coating apparatus that forms a wide belt-like fiber reinforcing cord by covering a plurality of core members arranged in parallel with rubber as a heated fiber reinforcing cord. The core material pitch variable method of the fiber reinforcement cord as described in any one of 1-8.   A fiber reinforced cord obtained by the core material pitch varying method of the fiber reinforced cord according to any one of claims 1 to 9 is spirally wound around an outer peripheral surface of a cylindrical rubber, and the outer periphery of the cylindrical rubber is A method for producing a fiber-reinforced rubber hose for forming a fiber-reinforced layer.   The fiber-reinforced rubber hose according to claim 10, wherein a side having a small core material pitch of the fiber reinforced cord is wound around a small diameter side of the cylindrical rubber, and a side having a large core material pitch is wound around the large diameter side of the cylindrical rubber. Method. The manufacturing method of the fiber reinforced rubber hose which uses the fiber reinforced rubber hose obtained by the manufacturing method of the fiber reinforced rubber hose of Claim 11 for the pumping tube in a squeeze type pump.

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