JP2006150829A - Filament winding device, filament winding method and bobbin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain a filament stretched between a bobbin and a roller from slacking and maintain the tension of the filament appropriately. <P>SOLUTION: In the filament winding device which continuously supplies the filament 12 by turning the bobbin 20 and which, while supporting and rotating a member around which to be wound, winds the continuously supplied filament 12 around it, the shape of the bobbin 20 is formed so that the rate of change with time with respect to the length of the filament stretched between the bobbin 20 and the roller 24 may become continuous. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a filament winding apparatus, a filament winding method, and a bobbin that can supply a filament from a bobbin while maintaining an appropriate tension.

  The filament winding method is a filament impregnated with a resin (in this specification, “filament” includes a material composed of carbon fiber, glass fiber, or the like as a material, and from a single filamentous form to a plurality of filaments. It is a concept that includes a bundle of fibers) that is regularly wound around a rotating mandrel or filament wound member while applying a certain tension, molded to a predetermined thickness, and then cured to form a product. is there. The filament winding method is roughly classified into a method using a filament impregnated with a resin in advance and a method of winding while impregnating a resin during the process using an impregnation apparatus provided in the filament winding apparatus.

  When the filament is wound around the member, it is important that a predetermined tension is applied so that the filament does not loosen. When the tension applied to the filament is lowered, the filament is slack, the impregnation state is changed, the quality is not constant, and the filament cannot be regularly wound around the mandrel or the filament wound member.

  Therefore, Patent Documents 1 to 5 disclose a technique in which a tension adjusting mechanism is disposed between a bobbin and a winding member, and winding is performed while adjusting the tension of the filament.

Japanese Utility Model Publication No. 1-169570 JP-A-8-72156 JP 2000-117847 A JP 2001-260240 A JP 2003-206071 A

  In the prior art, as shown in FIGS. 5A and 5B, the filament 12 wound around the bobbin 10 is pulled out via a roller 14 for guiding the filament. FIG. 6 shows the filament 12 drawn position X in the axial direction of the bobbin 10 when the filament is wound around the member, and the length of the filament 12 stretched between the bobbin 10 and the roller 14 when the filament is drawn from the position X. Each time change of the length L and the time change rate ΔL of the length L will be described.

  Both the bobbin 10 and the roller 14 used in the above-described prior art have a cylindrical shape with a uniform diameter, and the filament 12 is wound so as to be folded at the end of the bobbin 10. At the timing when the drawing position X of the filament 12 is folded back at the end of the bobbin 10, the temporal change rate ΔL of the length L of the filament 12 stretched between the bobbin 10 and the roller 14 changes discontinuously. At that timing, the filament 12 stretched between the bobbin 10 and the roller 14 is bent, and the tension adjusting mechanism of the above-described prior art cannot adjust the tension of the filament 12 to a desired range.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a filament winding apparatus, a filament winding method, and a bobbin that can appropriately maintain the tension of the filament.

  The present invention includes a winding portion for winding a continuously supplied filament around the member to be wound while supporting and rotating the member to be wound, and a bobbin around which the filament is wound, and the filament is continuously formed by rotating the bobbin. A filament winding apparatus comprising: a supply unit that supplies the filament; a roller on which the filament supplied from the bobbin is directly mounted; and a guide unit that guides the filament to the winding unit, wherein the bobbin includes the bobbin And the length of the filament stretched between the roller and the roller has a continuous shape.

  Here, it is preferable that the bobbin has a non-uniform diameter along the axial direction in a region where the filament is wound. Specifically, it is preferable that the bobbin has a diameter in the vicinity of the end of the region where the filament is wound larger than the diameter in the vicinity of the center.

  The present invention also includes a winding portion for winding a continuously supplied filament around the member to be wound while supporting and rotating the member to be wound, and a bobbin around which the filament is wound, and the filament is obtained by rotating the bobbin. A filament winding apparatus comprising: a supply unit for continuously supplying a filament; and a roller on which a filament supplied from the bobbin is directly hung, and a guide unit for guiding the filament to the winding unit. It has a shape in which the temporal change rate of the length of the filament stretched between the bobbin and the roller is continuous.

  Here, it is preferable that the roller has a non-uniform diameter along the axial direction in a region where the filament is hung. Specifically, it is preferable that the roller has a smaller diameter near the end of the region where the filament is hung than a diameter near the center.

  Further, the present invention is a bobbin used in a filament winding apparatus, wherein the bobbin has a non-uniform diameter along the axial direction in a region where the filament is wound. Specifically, it is preferable that the diameter near the end of the region where the filament is wound is larger than the diameter near the center.

  According to the present invention, the member to be wound is supplied by continuously supplying the filament from the bobbin wound with the filament by supporting and rotating the member to be wound, and via the roller on which the filament supplied from the bobbin is directly laid. The filament winding method is characterized in that the filament is supplied so that the temporal change rate of the length of the filament stretched between the bobbin and the roller is continuous.

  Further, by supporting and rotating the member to be wound, the filament is continuously supplied from the bobbin around which the filament is wound, and is wound around the member to be wound through a roller on which the filament supplied from the bobbin is directly laid. In the filament winding method, when the filament is continuously supplied, a change in the distance between the point where the filament is supplied from the bobbin and the point where the supplied filament contacts the roller is suppressed. The filament is supplied in such a manner.

  ADVANTAGE OF THE INVENTION According to this invention, the bending of the filament stretched between a bobbin and a roller can be suppressed, and the tension | tensile_strength of a filament can be maintained appropriately at the time of winding of a filament.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

  FIG. 1 is a schematic diagram showing an overall configuration of a filament winding apparatus 100 according to the present embodiment. The filament winding apparatus 100 is roughly composed of three parts: a supply unit 102, a guide unit 104, and a winding unit 106.

  The supply unit 102 includes a bobbin 20 around which the filament 12 is wound, and a support mechanism (not shown) that supports and rotates the bobbin 20. The filament 12 is pulled out from the bobbin 20, and after the tension is adjusted by the guide unit 104, the filament 12 is supplied to the winding unit 106. The filament 12 is fed from the bobbin 20 by pulling the filament 12 from the winding portion 106. That is, the bobbin 20 is rotated by this pulling force, and the filament 12 is continuously drawn out.

  The guide unit 104 guides the filament 12 drawn from the supply unit 102 and supplies the filament 12 to the winding unit 106. The guide unit 104 includes, for example, a fixed guide 22 and a roller 24 installed between the supply unit 102 and the winding unit 106. It is also preferable to provide an active dancer 26 for absorbing the slack of the filament 12 and keeping the tension of the filament 12 within a predetermined range. The active dancer 26 includes a dancer roll 28. The tension of the filament 12 drawn by the tension sensor 30 is measured, and the control unit 32 receiving the result absorbs a certain amount of slack generated in the filament 12 by adjusting the weight, thereby controlling the tension of the filament 12. Is possible.

  The winding unit 106 includes, for example, a high-pressure vessel 34 as a member to be wound and a drive mechanism (not shown) that supports and rotates the high-pressure vessel 34. The filament 12 fed out from the supply unit 102 and held at an appropriate position by the guide unit 104 is wound around the surface of the high-pressure vessel 34. The high-pressure vessel 34 can be rotated about the horizontal axis by the drive mechanism and can be moved along the axial direction of the high-pressure vessel 34. Thereby, the filament 12 can be helically wound around the surface of the high-pressure vessel 34.

  The filament winding apparatus 100 according to the present embodiment is characterized in that the bobbin 20 provided in the supply unit 102 has a non-uniform diameter along the axial direction. 2A is a partial view of the main parts of the supply unit 102 and the guide unit 104 as viewed from the front, and FIG. 2B is a partial view of the main parts of the supply unit 102 and the guide unit 104 as viewed from the side.

  It is preferable that the change in the distance between the point where the filament 12 is supplied from the bobbin 20 and the point where the supplied filament 12 contacts the roller 24 is suppressed. Specifically, it is preferable that the first-order differentiation with respect to time is possible for the length L of the filament 12 stretched between the bobbin 20 and the first roller 24. For example, the diameter of the bobbin 20 is set so that the temporal change rate ΔL of the length L of the filament 12 stretched between the bobbin 20 and the first roller 24 is always continuous along the axial direction. To do.

  More specifically, it is preferable that the diameter near the end of the region where the filament 12 is wound is larger than the diameter near the center along the axial direction of the bobbin 20. Here, the diameter of the bobbin 20 is preferably changed smoothly and continuously along the axial direction. For example, as shown in FIGS. 2A and 2B, the diameter of the bobbin 20 can be set so that the length L of the filament 12 stretched between the bobbin 20 and the first roller 24 is kept substantially constant. preferable.

  FIG. 3 shows the filament 12 stretched between the bobbin 20 and the first roller 24 when the filament is drawn from the position X of the filament 12 in the axial direction of the bobbin 20 when the filament is drawn. Each time change of the length L and the temporal change rate ΔL of the length L will be described.

  In the bobbin 20, the filament 12 is wound so as to be folded near the end portion. Therefore, when the filament 12 is pulled out, the bobbin 20 and the roller 24 have a timing at which the pull-out position X is folded at the end portion of the bobbin 20. The temporal change rate ΔL of the length L of the filament 12 stretched between them can be continuously maintained. Therefore, the filament 12 stretched between the bobbin 20 and the roller 24 is not bent, and the filament 12 is wound while maintaining the tension of the filament 12 within a desired range by a tension adjusting mechanism such as the active dancer 26. Can do.

  For example, in the bobbin 20 shown in FIGS. 2A and 2B, the length L of the filament 12 stretched between the bobbin 20 and the first roller 24 is kept substantially constant. The rate ΔL is also maintained substantially constant. Thereby, the filament 12 can be wound using the tension adjusting mechanism while maintaining the tension of the filament 12 within a desired range.

  Based on the same principle, the deflection of the filament 12 can be suppressed by changing the shape of the roller 24.

  In the modification, the first roller 25 on which the filament is directly hung from the bobbin has a non-uniform diameter along the axial direction. 4A is a partial view of the main parts of the supply unit 102 and the guide unit 104 as viewed from the front, and FIG. 4B is a partial view of the main parts of the supply unit 102 and the guide unit 104 as viewed from the side.

  The diameter of the roller 25 is set so that the temporal change rate ΔL of the length L of the filament 12 stretched between the bobbin 21 and the first roller 25 is always continuous along the axial direction. That is, it is preferable that the first-order differentiation with respect to time is possible for the length L of the filament 12 stretched between the bobbin 21 and the roller 25.

  Specifically, it is preferable that the diameter near the end of the region where the filament 12 is hung is smaller than the diameter near the center along the axial direction of the roller 25. Here, the diameter of the roller 25 is preferably changed smoothly and continuously along the axial direction. For example, as shown in FIGS. 4A and 4B, it is preferable to set the diameter of the roller 25 so that the length L of the filament 12 stretched between the bobbin 21 and the roller 25 is kept substantially constant.

  At the time of drawing the filament at this time, the filament 12 drawn between the bobbin 21 and the first roller 25 when the filament is drawn from the drawing position X of the filament 12 in the axial direction of the bobbin 21 and the position X. The respective temporal changes of the length L and the temporal change rate ΔL of the length L are the same as those in FIG.

  By providing such a roller 25, the length L of the filament 12 stretched between the bobbin 21 and the roller 25 can be obtained even when the drawing position X is turned back at the end of the bobbin 21 when the filament 12 is pulled out. The temporal change rate ΔL can be maintained continuously. Therefore, the filament 12 stretched between the bobbin 21 and the roller 25 is not bent, and the filament 12 is wound while maintaining the tension of the filament 12 within a desired range by a tension adjusting mechanism such as the active dancer 26. Can do.

  In addition, it is also suitable to apply the bobbin 20 and the roller 25 in the present embodiment in combination. Also in this case, the temporal change rate ΔL of the length L of the filament 12 stretched between the bobbin 20 and the roller 25 is set to be always continuous.

  As mentioned above, although preferred embodiment of this invention was described, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the embodiment. It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

It is the schematic which shows the whole structure of the filament winding apparatus in this Embodiment. It is the front view and side view of the principal part of the supply part and guide part in this Embodiment. It is a graph for demonstrating the effect of this Embodiment. It is the front view and side view of the principal part of the supply part and guide part in a modification. It is the front view and side view of the principal part of the supply part and guide part in the conventional filament winding apparatus. It is a graph for demonstrating the problem of the conventional filament winding apparatus.

Explanation of symbols

  10 bobbins, 12 filaments, 14 rollers, 20, 21 bobbins, 22 fixed guides, 24, 25 rollers, 26 active dancers, 28 dancer rolls, 30 tension sensors, 32 control units, 34 high pressure vessels, 100 filament winding devices, 102 supply Part, 104 guide part, 106 winding part.

Claims (10)

A winding unit for winding the continuously supplied filament around the member to be wound while supporting and rotating the member to be wound;
A supply unit comprising a bobbin wound with a filament, and continuously supplying the filament by rotating the bobbin;
A roller on which the filament supplied from the bobbin is directly laid, and a guide unit for guiding the filament to the winding unit;
A filament winding apparatus comprising:
The filament winding apparatus, wherein the bobbin has a shape in which a rate of change in the length of the filament stretched between the bobbin and the roller is continuous. The filament winding apparatus according to claim 1, wherein
The bobbin has a non-uniform diameter along the axial direction in a region where the filament is wound. The filament winding apparatus according to claim 2,
The filament winding apparatus according to claim 1, wherein the bobbin has a diameter near an end portion of a region where the filament is wound larger than a diameter near the center. A winding unit for winding the continuously supplied filament around the member to be wound while supporting and rotating the member to be wound;
A supply unit comprising a bobbin wound with a filament, and continuously supplying the filament by rotating the bobbin;
A roller on which the filament supplied from the bobbin is directly laid, and a guide unit for guiding the filament to the winding unit;
A filament winding apparatus comprising:
The filament winding apparatus, wherein the roller has a shape in which a temporal change rate of a length of a filament stretched between the bobbin and the roller is continuous. The filament winding apparatus according to claim 4, wherein
The filament winding apparatus according to claim 1, wherein the roller has a non-uniform diameter along an axial direction in a region where the filament is hung. The filament winding apparatus according to claim 5, wherein
The filament winding apparatus according to claim 1, wherein the roller has a diameter near an end of a region where the filament is hung smaller than a diameter near the center. A bobbin used in a filament winding apparatus,
The bobbin has a non-uniform diameter along the axial direction in a region where the filament is wound. The bobbin according to claim 7,
A bobbin characterized in that the diameter near the end of the region where the filament is wound is larger than the diameter near the center. Filament winding in which a filament is continuously supplied from a bobbin wound with a filament by supporting and rotating the member to be wound, and then wound around the member to be wound via a roller on which the filament supplied from the bobbin is directly mounted. A method,
A filament winding method, characterized in that the filament is supplied such that the rate of change in the length of the filament stretched between the bobbin and the roller is continuous. Filament winding in which a filament is continuously supplied from a bobbin wound with a filament by supporting and rotating the member to be wound, and then wound around the member to be wound via a roller on which the filament supplied from the bobbin is directly laid. A method,
When the filament is continuously supplied, the filament is supplied so that a change in the distance between the point where the filament is supplied from the bobbin and the point where the supplied filament contacts the roller is suppressed. A filament winding method characterized by that.

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