JP2004142891A - Method and device for uncoiling long member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively suppress a tension change in a steel cord 17 resulting from a winding diameter change of the steel cord 17. <P>SOLUTION: When the steel cord 17 is uncoiled from a reel 11 and a winding diameter is decreased, tension in the steel cord 17 becomes larger, so that reaction force (internal tension) applied from the steel cord 17 to a roller 64 becomes larger. Braking force applied from a brake band 60 to the reel 11 corresponds to rocking force (fundamentally determined with energizing force of a tension spring 52) generated in a position connecting a control arm 49 to the brake band 60, but the reaction force acts in the direction to reduce this rocking force, so that the braking force applied to the reel 11 becomes smaller and the internal tension of the steel cord 17 is prevented from increasing. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an unwinding method and apparatus for unwinding a long member such as a steel cord from a reel.
[0002]
[Prior art]
[Patent Document 1]
JP-A-9-30736
As a conventional unwinding device for a long member, for example, a device described in Patent Document 1 is known. This is a frame, a pair of bearing arms supported on the frame so as to be able to move up and down, both ends are rotatably supported by the bearing arm, and a central portion is inserted into a reel on which a long member is wound. A shaft that allows the reel to freely rotate on the frame, a brake mechanism that applies a constant braking force to the shaft and the reel, and a bearing arm that is raised after the shaft is inserted into the reel. And a cylinder for lifting the reel by a predetermined amount.
[0004]
When the long member is to be unwound therefrom, the shaft is inserted into the reel on which the long member is wound, and then the bearing arm is raised by the cylinder to lift the reel by a predetermined amount. Next, while applying a constant braking force to the shaft and the reel by the brake mechanism, the long members are taken out, so that the long members are successively unwound from the reels.
[0005]
[Problems to be solved by the invention]
However, in such a conventional method and apparatus for unwinding a long member, a constant braking force is always applied to the reel by a brake mechanism. When the winding diameter of the elongate member decreases, the tension in the elongate member changes, that is, gradually increases, thereby adversely affecting the next process, for example, a forming operation of the tire constituent member and an attaching operation to the drum. There is a problem that there is.
[0006]
An object of the present invention is to provide a method and an apparatus for unwinding a long member that can effectively suppress a change in tension in the long member due to a change in a winding diameter of the long member.
[0007]
[Means for Solving the Problems]
The first object of the present invention is to firstly support an elongate member unwound by being taken off from a reel so that a center portion of the elongate member is swingably supported by support means for supporting the reel so as to freely rotate. A biasing force is applied from the biasing means to the other end in a direction in which the other end is separated from the reel, and the roller is supported by the other end of an adjustment arm extending substantially tangentially to the reel and freely rotatably supported by the roller. While turning the direction while turning the direction in the opposite direction to the moving direction of the other end of the adjusting arm by the biasing means, at the connection position mainly based on the biasing force of the biasing means by the braking means connected to the adjusting arm. A braking force corresponding to the rocking force of the long member is applied to the reel, whereby the braking force applied to the reel from the braking means by the action force applied to the roller from the long member is adjusted, and the winding of the long member is performed. Decrease due can be accomplished by unwinding the method of elongate members so as to suppress the variation in tension in the elongate member,
[0008]
Secondly, a supporting means for supporting the reel on which the long member is wound up in a freely rotatable manner, an adjusting arm having a central portion swingably supported by the supporting means and extending substantially tangentially to the reel, A biasing means for applying a biasing force to one end of the adjusting arm and swinging the adjusting arm so that the other end is separated from the reel; and a biasing means coupled to the adjusting arm and mainly based on the biasing force of the biasing means. A braking means for applying a braking force corresponding to the swinging power at the connection position to the reel, and a long member unwound by being supported by the other end of the adjustment arm so as to be freely rotatable and pulled out from the reel And a roller for turning the running direction of the long member in a direction opposite to the moving direction of the other end of the adjustment arm by the biasing means, and braking by the action force applied to the roller from the long member. Lee from the means Adjust the braking force applied to, thereby, can be achieved by unwinding apparatus of the elongated member which is adapted to suppress a variation in tension in the elongate member by reducing the winding diameter of the elongated member.
[0009]
The long member unwound from the reel by being picked up is wrapped around a roller, so that the running direction is turned by the biasing means in a direction opposite to the direction in which the other end of the adjustment arm moves, and then the next time. Sent to the process. At this time, since a braking force is applied to the reel from the braking means, a certain amount of tension is generated in the long member.
[0010]
Here, the above-mentioned braking force is a force corresponding to the oscillating force generated at the connecting position between the adjusting arm and the braking means, and the oscillating force generated at this connecting position is basically one end of the adjusting arm. Although it is determined by the urging force applied from the urging means to the portion, the acting force for swinging the adjusting arm in a direction opposite to the urging force, that is, from the long member to the other end of the adjusting arm via the roller. It is slightly reduced by the applied tension. As described above, the swinging power at the connection position is mainly based on the urging force of the urging means.
[0011]
As described above, when the long members are successively unwound from the reel and the winding diameter of the long members on the reel is reduced, the length of the arm from the axis of the reel to the unwinding position of the long member is shortened. The tension in the elongate member increases, but when the internal tension of the elongate member increases, the swinging force generated at the connection position decreases, so that the braking force applied to the reel from the braking means decreases. Accordingly, the increase in the internal tension of the long member described above is suppressed. Thus, even if the winding diameter of the long member changes (decreases), the change (increase) in the tension in the long member is effectively suppressed.
[0012]
Further, according to the structure of the third aspect, the structure of the urging means can be simplified, and a constant urging force can be continuously applied to the adjusting arm for a long time.
Further, with the structure as described in claim 4, the structure of the braking means can be simplified and it can be manufactured at low cost.
[0013]
In addition, according to the structure described in claim 5, the reel can be reliably raised with a simple structure and at low cost.
Further, it is preferable that the long member be a steel cord as described in claim 6, since a large change in internal tension appears.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1, 2 and 3, reference numeral 11 denotes a reel. The reel 11 is fixed to a cylindrical drum portion 12 and both ends in the axial direction of the drum portion 12 so as to close both end openings of the drum portion 12, respectively. The drum unit 12 includes coaxial disk-shaped flange portions 13 and 14. At both ends in the axial direction of the reel 11, that is, at the flange portions 13 and 14, there are formed truncated conical tapered holes 15 and 16 located on the axis of the reel 11, respectively. In each case, the inner diameter is widened toward the outside in the axial direction so that the inner diameter becomes larger. Around the reel 11, more specifically, around the drum portion 12, a steel cord 17 coated with rubber as a long member is wound many times, and as a result, the steel cord 17 is wound. The reel 11 is heavy.
[0015]
Reference numeral 20 denotes a one-side stand installed on a floor surface 21 on one side in the axial direction from the reel 11. A bottomed cylindrical case 22 having the other end opened is fixed to the upper end of the one-side stand 20. The height position of the center axis of the case 22 from the floor surface 21 is slightly higher (larger) than the radius of the reel 11, specifically, the flange portions 13 and 14. A movable shaft 24 is inserted into a cylindrical slide support 23 mounted on the inner periphery of the case 22, and a key 25 mounted on the inner periphery of the slide support 23 is moved in an axial direction formed on the outer periphery of the movable shaft 24. The keyway 26 extends to the right. As a result, the movable shaft 24 is inserted into the case 22 movably in the axial direction while being prevented from rotating.
[0016]
A center member 30 coaxial with the movable shaft 24 is rotatably supported at an axial inner end (the other end) of the movable shaft 24 protruding from the case 22 via a bearing 29. The inner end is provided with a frusto-conical tapered portion 31 which tapers toward the other end at the same gradient as the tapered hole 15 (as approaching the reel 11). The above-described movable shaft 24 and center member 30 as a whole are located on one side of the reel 11 at a position slightly higher than the radius of the reel 11, here, １ ／ of the value obtained by subtracting the minimum diameter from the maximum diameter of the tapered portion 31. A one-sided support shaft 32 is provided at a position higher than the lower end, and has a tapered portion 31 at the inner end in the axial direction that can be inserted into the tapered hole 15.
[0017]
On the other hand, another stand 35 is installed on the floor surface 21 on the other side in the axial direction from the reel 11, and a fixed shaft (not shown) coaxial with the movable shaft 24 is provided on the upper end of the other stand 35. Fixed. A center member 36 similar to the above-described center member 30 is rotatably supported at an axial inner end (one end) of the fixed shaft, and the tapered hole 16 is formed at the axial inner end of the center member 36. A frustoconical tapered portion 37 is provided which tapers toward the one end at the same gradient (as approaching the reel 11). The above-mentioned fixed shaft and center member 36 are installed at a position slightly higher than the radius of the reel 11 on the other side of the reel 11 as a whole, and have a tapered portion 37 at the inner end in the axial direction that can be inserted into the tapered hole 16. The other side support shaft 38 is configured.
[0018]
Reference numeral 40 denotes a screw shaft as a moving mechanism rotatably supported on the bottom wall (one side wall) of the case 22. The screw shaft 40 is coaxial with the case 22 and has a trapezoidal male screw 41 on the outer periphery of the other side. Is formed. The male screw 41 of the screw shaft 40 is screwed into a trapezoidal female screw 43 formed on the inner periphery of the movable shaft 24, whereby the screw shaft 40 is rotated by a motor (not shown) or an operator. Then, the one-side support shaft 32 moves in the axial direction, and approaches and separates from the reel 11.
[0019]
Then, the reel 11 around which the steel cord 17 has been wound is carried between the one side and the other side support shafts 32 and 38 while being rolled on the floor surface 21, and the axis of the one side and the other side support shafts 32 and 38. When the axis of the reel 11 arrives on the vertical plane including the vertical axis, the screw shaft 40 is rotated, and the one-side support shaft 32 is moved toward the other side (axially inward to approach the reel 11). As a result, the center member 30 of the one-side support shaft 32 is inserted into the tapered hole 15 of the reel 11, and the upper end of the other end (tip) of the center member 30 is positioned at the upper end of the open end (one end) of the tapered hole 15. When the one-side support shaft 32 is further moved to the other side even after such contact, the reel 11 is pushed by the one-side support shaft 32 and is slightly shifted on the floor surface 21 to the other side, and the taper is tapered. The upper end of the opening end (the other end) of the hole 16 and the upper end of the one end (the end) of the center member 36 come into contact with each other.
[0020]
In this state, when the one-side support shaft 32 is further moved to the other side, the center members 30 and 36 are inserted while sliding on the tapered holes 15 and 16. At this time, the tapered holes 15, the tapered portion 31 and the tapered holes 31 are inserted. Since both the taper portion 16 and the taper portion 37 are tapered surfaces of the same gradient tapering inward in the axial direction, when they are inserted until they come into close contact with each other, the reel 11 floats up a little from the floor surface 21. Then, as described above, when the tapered holes 15 and the tapered portions 31 and the tapered holes 16 and 37 are in close contact with each other, the reel 11 is centered by the one-side and other-side support shafts 32 and 38, and is freely rotatable. Supported. The above-described one-side stand 20, the case 22, the slide support 23, and the other-side stand 35 as a whole constitute support means 44 for supporting the one-side and the other-side support shafts 32, 38. Is supported by the first and second support shafts 32 and 38 so as to be freely rotatable.
[0021]
Then, as described above, the support means 44 at a position slightly higher than the radius of the reel 11 is provided with the tapered portions 31 and 37 which can be inserted into the tapered holes 15 and 16 at the inner end in the axial direction. , 38, and a screw shaft 40 for axially moving at least one of the one and the other support shafts 32, 38, here only the one support shaft 32, is provided. The one-side support shaft 32 is moved inward in the axial direction, and the taper portions 31 and 37 of the one-side and the other-side support shafts 32 and 38 are inserted into the tapered holes 15 and 16 of the reel 11 while slidingly contacting them. If the reel 11 is lifted by a small amount, the reel 11 can be reliably raised with a simple structure and at low cost.
[0022]
The other side stand 35 has a horizontal beam 47 extending horizontally forward at an upper end thereof, and a front end (front end) of the horizontal beam 47 extends in a substantially tangential direction to the reel 11 via a connecting pin 48. Here, a center portion of the adjusting arm 49 extending substantially in the vertical direction is rotatably connected. Thus, the adjusting arm 49 is swingably supported by the support means 44 with the connecting pin 48 as the swing center.
[0023]
A balance weight 51 is provided on the adjustment arm 49 on one end side (lower side) of the connection pin 48, and one end (lower end) of the adjustment arm 49 on one end side from the balance weight 51 is pulled as a biasing means. The other end of the spring 52 is locked. One end of the tension spring 52 is locked to the lower end of the other stand 35 via a bracket 53, whereby the urging force of the tension spring 52 is applied to one end of the adjustment arm 49, 49 swings forward so that the other end (upper end) is separated from the reel 11. If the urging means is constituted by the tension spring 52 in this way, the structure of the urging means can be simplified, and a constant urging force can be continuously applied to the adjusting arm 49 for a long time.
[0024]
Reference numeral 56 denotes a braking drum rotatably supported by the other stand 35. The braking drum 56 is coaxial with the center member 36 and is disposed on one side of the other stand 35. An insertion pin 57 projecting toward one side (reel 11) is fixed to one side surface of the braking drum 56, and the insertion pin 57 can be inserted into an insertion hole 58 formed in the flange portion 14 of the reel 11. It is. When the reel 11 is freely rotatably supported by the first and second support shafts 32 and 38, and the insertion pin 57 is inserted into the insertion hole 58, the braking drum 56 is integrated with the reel 11. Can rotate.
[0025]
Reference numeral 60 denotes a brake band, one end of which is connected to the adjustment arm 49 on the other side from the connection pin 48, as a braking means. The other end is fixed to the support means 44, specifically, the cross beam 47 via a fixing pin 61. The brake band 60 has a braking force corresponding to the swinging power of the adjusting arm 49 at the connection position between one end of the brake band 60 and the adjusting arm 49, in this embodiment, the swinging power mainly based on the urging force of the tension spring 52. Is applied to the braking drum 56 and the reel 11. If the braking means is composed of the brake band 60 in this way, the structure of the braking means can be made simple and inexpensive.
[0026]
A roller 64 is freely rotatably supported at the other end of the adjusting arm 49 located on the other side (upper side) of the connection position between the one end of the brake band 60 and the adjusting arm 49, and the axis of the roller 64 is the reel. 11 is parallel to the axis. As a result, one end of the brake band 60 is connected to the adjusting arm 49 between the swing center (the connecting pin 48) and the roller 64. Here, the roller 64 is integrally attached to a shaft 66 rotatably supported by the adjustment arm 49 via a bearing 65 and the shaft 66, and overlaps the drum 12 in the radial direction. And a bottomed cylindrical main body 67 having a larger diameter than the shaft portion 66.
[0027]
A steel cord 17 wound around the reel 64 by being pulled out from the reel 11 is wound around the roller 64, more specifically, around the main body portion 67. As a result, the traveling direction is changed to the direction in which the other end of the adjustment arm 49 is moved by the tension spring 52, that is, the direction opposite to the front direction, that is, the rear direction. As a result, an acting force based on the internal tension of the steel cord 17 is applied to the roller 64 from the steel cord 17, and this acting force acts on the adjusting arm 49 as a force in a direction opposite to the urging force of the tension spring 52. I do. As a result, the oscillating power of the adjusting arm 49 at the connection point between the adjusting arm 49 and the brake band 60 is slightly smaller than the oscillating power of the tension spring 52 alone, and the braking force of the brake band 60 is actually reduced to the above-mentioned acting force. Becomes a value corresponding to the swing power adjusted.
[0028]
Next, the operation of the embodiment of the present invention will be described.
Now, the steel cord 17 is taken out and unwound from the reel 11 and sent to the next step. In the next step, a belt-shaped tire component such as a belt ply is formed together with other steel cords 17. Suppose you have At this time, since the steel cord 17 is wrapped around the roller 64 immediately after unwinding, the running direction, which was substantially forward at the time of unwinding, is moved backward by the roller 64, that is, the other end of the adjusting arm 49 by the tension spring 52. Is turned in the direction opposite to the direction in which the object moves. At this time, since a braking force is applied to the reel 11 by the brake band 60, a certain value of tension is generated in the steel cord 17.
[0029]
Here, the above-described braking force is a force corresponding to the oscillating force generated at the connecting position between the adjusting arm 49 and the brake band 60, and the oscillating force generated at this connecting position is basically the adjusting arm. Although determined by the biasing force applied from one end of the tension spring 52 to the one end of the adjusting arm 49, the acting force for swinging the adjusting arm 49 in a direction opposite to the biasing force, that is, the other end of the adjusting arm 49 via the roller 64. The tension is slightly reduced by the tension applied from the steel cord 17 to the portion. Thus, the swinging power at the connection position is mainly based on the urging force of the tension spring 52.
[0030]
Then, as described above, when the steel cords 17 are unwound from the reel 11 one after another and the winding diameter of the steel cord 17 on the reel 11 decreases, the length of the arm from the axis of the reel 11 to the unwinding position of the steel cord 17 is obtained. , The tension in the steel cord 17 increases, but when the internal tension of the steel cord 17 increases in this way, the acting force applied from the roller 64 to the adjustment arm 49 increases, and the Since the generated oscillating force is reduced, the braking force applied from the brake band 60 to the reel 11 is reduced, thereby suppressing an increase in the internal tension of the steel cord 17.
[0031]
In this manner, the braking force applied from the brake band 60 to the reel 11 is adjusted by the action force (internal tension) applied from the steel cord 17 to the roller 64 and the adjusting arm 49, whereby the winding of the steel cord 17 is performed. Even if the diameter changes (decreases), the change (increase) in the tension in the steel cord 17 is effectively suppressed. Here, as described above, it is preferable that one steel cord 17 be unwound from the reel 11, since a large change in internal tension during unwinding appears.
[0032]
In the above-described embodiment, the long member is a single steel cord 17 coated with rubber, but in the present invention, a belt-like rubber member in which a plurality of cords are embedded may be used. In the above-described embodiment, the tension spring 52 is used as the urging means. However, in the present invention, a rubber band, an air cylinder, or the like may be used. In the above-described embodiment, the screw shaft 40 is used as the moving mechanism. However, in the present invention, a hydraulic cylinder or the like may be used.
[0033]
Further, in the above-described embodiment, the brake band 60 wrapped around the braking drum 56 is used as the braking means. However, in the present invention, a shoe that applies a braking force by being pressed against the outer periphery of the braking drum is used. You may do so. In this case, the shoe is connected to the adjusting arm between the swing center and the position where the biasing force is applied. In the above-described embodiment, only one support shaft 32 is moved in the axial direction. However, in the present invention, only the other support shaft or both support shafts are moved in the axial direction. It may be.
[0034]
【The invention's effect】
As described above, according to the present invention, it is possible to effectively suppress a change in tension in the long member due to a change in the winding diameter of the long member.
[Brief description of the drawings]
FIG. 1 is a right side view showing an embodiment of the present invention.
FIG. 2 is a partially cutaway front view.
FIG. 3 is a front sectional view near the one-side support shaft.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Reel 15, 16 ... Tapered hole 17 ... Long member 31, 37 ... Tapered part 32, 38 ... Support shaft 40 ... Moving mechanism 44 ... Support means 49 ... Adjustment arm 52 ... Biasing means 56 ... Braking drum 60 ... Braking Means 64: Roller

Claims (6)

The long member unwound by being taken off from the reel is swingably supported at a central portion by supporting means for supporting the reel in a freely rotatable manner. A biasing force is applied in a direction away from the reel, and a roller rotatably supported at the other end of the adjusting arm extending substantially tangentially to the reel has its running direction adjusted by the biasing means. While turning around while turning in the direction opposite to the moving direction of the end, the braking force corresponding to the swinging power at the connection position based on the urging force of the urging means is mainly applied by the braking means connected to the adjusting arm. To thereby adjust the braking force applied from the braking means to the reel by the action force applied to the roller from the elongated member, and reduce the winding diameter of the elongated member by reducing the winding diameter of the elongated member. Unwinding process of the elongated member, characterized in that so as to suppress the force change. Support means for supporting the reel on which the elongate member has been wound so as to be freely rotatable; an adjusting arm having a central portion swingably supported by the support means and extending substantially tangentially to the reel; and one end of the adjusting arm A biasing means for applying a biasing force to the portion and swinging the adjusting arm so that the other end is separated from the reel; and a biasing means connected to the adjusting arm and mainly at the connection position based on the biasing force of the biasing means. A braking means for applying a braking force corresponding to the swinging power of the reel to the reel, and a long member unwound by being taken off from the reel while being supported by the other end of the adjusting arm so as to be freely rotatable. A roller for turning the running direction of the elongate member in a direction opposite to the moving direction of the other end of the adjusting arm by the biasing means, and from the braking means to the reel by the action force applied to the roller from the elongate member. Grant The braking force is adjusted to be, thereby, unwinding device of the elongated member, characterized in that so as to suppress the variation in tension in the elongate member by reducing the winding diameter of the elongated member. 3. The unwinding device for a long member according to claim 2, wherein the biasing means is a tension spring having one end fixed to the support means and the other end locked to the adjusting arm. One end of the braking means is connected to an adjusting arm between its swing center and the roller, the other end is fixed to the supporting means, and a central part is wound around a braking drum which rotates integrally with the reel. The unwinding device for a long member according to claim 2 or 3, which is a band. On the axis of the reel, a frustoconical tapered hole is formed at both ends in the axial direction toward the outside in the axial direction. On the other hand, the tapered hole can be inserted into the support means at a position slightly higher than the reel radius. A supporting mechanism having a tapered portion at the inner end in the axial direction, and a moving mechanism for moving at least one of the supporting shafts in the axial direction, and moving the supporting shaft inward in the axial direction by the moving mechanism. The long member according to any one of claims 2 to 4, wherein the reel is lifted up by the slight amount by inserting the tapered portion of the support shaft into the tapered hole of the reel while sliding the tapered portion into contact with the tapered hole. Unwinding device. The unwinding device for a long member according to any one of claims 2 to 5, wherein the long member is a steel cord coated with rubber.

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