Yarn path guiding device and method for manufacturing roving wound body

Abstract

Provided are a yarn path guide device for guiding the traveling direction of a glass strand drawn out from the inner peripheral side of a cylindrical glass strand wound body, and a method for producing a roving wound body including a glass strand drawn out via the yarn path guide device, the yarn path guide device being capable of stably changing the traveling direction of the glass strand without causing quality deterioration, and a method for producing a roving wound body.SOLUTION: The device includes a first holder part 21 of a hollow cylindrical shape through which a glass strand S is inserted, and a yarn path direction changing part 22 which is provided at the end of the first holder part 21 on the downstream side in the advancing direction of the glass strand S and changes the advancing direction of the glass strand S.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a yarn guide device that guides the traveling direction (yarn guide direction) of a glass strand drawn out from a glass strand winding, and a method for manufacturing a roving winding made of a glass strand drawn out via the yarn guide device. [Background technology]

[0002] In general, glass fiber roving (hereinafter simply referred to as "roving") is produced by using a sizing agent to bundle hundreds to thousands of glass fibers (monofilaments) with a fiber diameter of several μm to form glass strands, and then aligning and doubling a predetermined number of the formed glass strands. Here, the roving process for producing roving has conventionally been carried out by winding a plurality of glass strands into a cylindrical shape while aligning them using a roving production apparatus shown below (see, for example, Patent Document 1).

[0003] That is, the roving manufacturing apparatus mainly comprises a creel stand, a tensioning device, a winding device, etc., and a plurality of cakes (glass strand wound bodies) each made of glass strands of a desired count wound into a cylindrical shape are pre-arranged on the creel stand. Then, glass strands are drawn out from the inner peripheral side of each of these glass strand winding bodies, and the drawn out glass strands are bundled together by passing through a predetermined bundling guide and bundled into a single roving.

[0004] After passing through the bundling guide, the single bundled roving is guided to a tensioning device while its traveling direction (yarn path direction) is changed by guide rollers, guide wheels, etc., and a predetermined tension is applied by the tensioning device. Thereafter, the roving is guided to a winding device, which is, for example, an automatic turret type roving winder, and wound into a cylindrical shape by a predetermined length. In this way, a roving package (roving wound body) is produced. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2-14846 Summary of the Invention [Problem to be solved by the invention]

[0006] In the conventional roving manufacturing apparatus described above, a yarn guide is provided near each glass strand winding body arranged on the creel stand, and the glass strand drawn out from the inner peripheral side of each glass strand winding body has its traveling direction (yarn guide direction) changed by the yarn guide and is then led to a focusing guide. Here, the yarn guide is fixedly disposed while being supported by a creel stand, and the relative position of the yarn guide with respect to each glass strand wound body is always maintained substantially constant. On the other hand, the glass strand is pulled out from the glass strand winding body while the position where the glass strand is peeled off from the inner periphery side of each glass strand winding body is constantly moving along the inner periphery side.

[0007] Therefore, the glass strand is constantly flapping as it is guided into the yarn guide, and then its direction of travel is forcibly changed by the yarn guide, which makes it prone to fuzzing and other problems as it passes through the yarn guide, which could be a factor in causing a deterioration in the quality of the glass strand.

[0008] The present invention has been made in consideration of the current problems described above, and has an object to provide a yarn guide device that guides the traveling direction of a glass strand drawn out from the inner peripheral side of a cylindrical glass strand winding body, and a method for manufacturing a roving winding body made of glass strands drawn out via the yarn guide device, which can stably change the traveling direction of the glass strand without causing a deterioration in quality, and a method for manufacturing a roving winding body. [Means for solving the problem]

[0009] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0010] That is, the yarn guide device according to aspect 1 of the present invention is a yarn guide device that guides the traveling direction of a glass strand drawn out from the inner peripheral side of a cylindrical glass strand winding body, and is characterized by comprising a hollow cylindrical first holder portion through which the glass strand passes, and a yarn guide direction changing portion that is provided at the end of the first holder portion downstream in the traveling direction of the glass strand and changes the traveling direction of the glass strand. With this configuration, the yarn path guide device of the present invention can guide the glass strand pulled out from the glass strand winding body to a predetermined position using the first holder section, and then change the direction of travel (yarn path direction) of the glass strand to a desired direction using the yarn path direction change section, thereby stably changing the direction of travel of the glass strand. Therefore, even if the glass strand is pulled out while the position at which it is peeled off from the inner periphery of the glass strand winding body is constantly moving along the inner periphery, the first holder section can stably guide the glass strand to the yarn path direction change section where the direction of travel of the glass strand (yarn path direction) is changed without flapping as in the past, thereby suppressing the occurrence of fuzzing and the like and enabling the direction of travel of the glass strand to be changed without causing any deterioration in quality.

[0011] Furthermore, a yarn path guide device according to aspect 2 of the present invention is characterized in that, in the above-mentioned aspect 1, the yarn path direction changing section has a curved surface that changes the traveling direction of the glass strand while making sliding contact with the glass strand. With this configuration, the yarn guide device according to the present invention can change the direction of travel of the glass strand relatively gently via the curved surface without placing an excessive burden on the glass strand.

[0012] Furthermore, the yarn path guide device according to aspect 3 of the present invention is characterized in that, in the above-mentioned aspect 1 or 2, it further comprises a second holder part provided at an end part of the yarn path direction changing part that is downstream in the traveling direction of the glass strand, and that holds the position of the glass strand whose traveling direction has been changed by the yarn path direction changing part. With this configuration, the yarn path guide device according to the present invention can reliably hold the traveling direction of the glass strand, which has been changed by the yarn path direction changing section, via the second holder section.

[0013] Furthermore, a yarn guide device according to a fourth aspect of the present invention is the yarn guide device of the third aspect, characterized in that the second holder portion has an eyelet through which the glass strand can be inserted. With such a configuration, the yarn path guide device according to the present invention can be constructed relatively inexpensively by configuring the second holder part using an eyelet, which is generally an inexpensive general-purpose product.

[0014] Furthermore, a yarn path guide device according to aspect 5 of the present invention is characterized in that, in aspect 3 or 4 above, the second holder portion further has a rotation means that enables the eyelet to rotate around an axis. By having such a configuration, the yarn path guide device of the present invention can, for example, even if a localized wear spot occurs on the inner surface of the eyelet due to the sliding of the glass strand, by rotating the eyelet via the rotating means, the glass strand can be caused to slide again continuously at a spot on the inner surface that avoids the wear spot, thereby extending the service life of the yarn path guide device.

[0015] A yarn guide device according to a sixth aspect of the present invention is the yarn guide device of the fifth aspect, characterized in that the rotating means comprises a bearing member fitted onto the eyelet. With such a configuration, the yarn path guide device according to the present invention can be constructed at relatively low cost by configuring the rotation means using bearing members which are generally inexpensive general-purpose products.

[0016] Furthermore, the yarn guide device according to a seventh aspect of the present invention is any one of the fourth to sixth aspects, characterized in that the eyelet is made of a resin member. By virtue of this configuration, the yarn path guide device according to the present invention can stably maintain the traveling direction of the glass strand, which has been changed by the yarn path direction changing section, via the eyelet without generating excessive frictional resistance.

[0017] Furthermore, a method for manufacturing a roving wound body according to an eighth aspect of the present invention is characterized in that a plurality of glass strands each drawn out from the glass strand wound body are bundled together and spliced ​​via a yarn path guide device according to any one of the first to seventh aspects. With this configuration, according to the method for manufacturing a roving wound body of the present invention, the above-mentioned yarn path guide device is used to stably pull out and bundle each glass strand from a plurality of glass strand wound bodies, thereby making it possible to obtain a high-quality roving wound body. [Effects of the Invention]

[0018] The present invention has the following effects. That is, according to the yarn guide device and the method for manufacturing a roving wound body of the present invention, the traveling direction (yarn guide direction) of the glass strand can be stably changed without causing a deterioration in quality. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a front view showing the overall configuration of a roving manufacturing apparatus equipped with a yarn path guiding device according to an embodiment of the present invention. [Figure 2] 2A and 2B are diagrams showing the configuration of a yarn path guide device, in which FIG. 2A is a plan view thereof and FIG. 2B is a front view thereof. DETAILED DESCRIPTION OF THE INVENTION

[0020] Next, one embodiment of the present invention will be described with reference to FIGS. For the sake of convenience, the following description will be given by defining the front-rear direction, left-right direction, and up-down direction of the roving manufacturing apparatus 1 or the yarn path guiding device 20 according to the directions of the arrows shown in FIGS. 1 and 2, the direction of the arrow A is defined as the traveling direction (yarn path direction) of the glass strand S or the roving R.

[0021] [Overall configuration of roving manufacturing device 1] First, the overall configuration of a roving manufacturing apparatus 1 equipped with a yarn path guiding device 20 embodying the present invention will be described with reference to FIG.

[0022] The roving manufacturing apparatus 1 in this embodiment is an apparatus that forms a roving R (glass fiber roving) by bundling glass strands S·S··· that are each drawn out from the inner peripheral side (for example, the inner peripheral surfaces 100a·100a···) of a plurality of cakes 100·100··· while aligning them together, and then winding the combined roving R into a cylindrical shape, thereby manufacturing a package of roving R (hereinafter referred to as a "roving wound body" as appropriate).

[0023] Here, the cake 100 is formed by drawing out molten glass at approximately 1200°C, which is melted in a glass melting furnace, from a number of bushing nozzles to produce (spin) glass fibers (monofilaments) having a fiber diameter of several μm to several tens of μm, and then using a bundling agent to bundle the hundreds to thousands of glass fibers produced to form a glass strand S, and then winding the formed glass strand S into a cylindrical shape. The cake 100 is an example of a glass strand wound body according to the present invention.

[0024] The roving manufacturing apparatus 1 mainly includes a creel stand 10, a yarn guide device 20, a tension device 30, a winding device 40, and the like.

[0025] The creel stand 10 holds a plurality of cakes 100, 100, etc. together, simultaneously pulls out glass strands S, S, etc. from the plurality of cakes 100, 100, etc., and bundles the pulled out glass strands S, S, etc. into a single strand.

[0026] The creel stand 10 has a frame 11 as a base, and inside the frame 11, a plurality of shelves 12 (two shelves in this embodiment) are provided.

[0027] Each shelf portion 12 has the function of holding a plurality of cakes 100 together and simultaneously pulling out the glass strands S from each of the cakes 100.

[0028] That is, in each shelf section 12, a yarn path guide device 20 is arranged near each of the multiple cakes 100, and these multiple yarn path guide devices 20 are each fixedly supported by the framework 11. In addition, at one end side (in this embodiment, the right end side) of each shelf section 12, there are provided a focusing guide 13 that combines multiple glass strands S·S···, and a yarn path guide roller 14 that changes the direction of travel of these multiple glass strands S·S···.

[0029] The multiple glass strands S·S··· pulled out from the inner periphery of each of the cakes 100·100··· held on each shelf section 12 are redirected in their direction by the yarn path guide devices 20·20··· and then led to the focusing guide 13, where they are then pulled together and combined as they pass through the focusing guide 13, and are bundled into a single roving R consisting of a bundle of glass strands S·S···.

[0030] The single bundled roving R passes through the bundling guide 13, and is then sent out to the outside of the creel stand 10 while its traveling direction is regulated by a yarn path guide roller 14. Thereafter, the roving R sent out to the outside of the creel stand 10 has its traveling direction changed by a plurality of (two in this embodiment) yarn path guide wheels 50 , 50 , and is guided to the tension device 30 .

[0031] The yarn path guide device 20 is a device that guides the traveling direction of the glass strand S drawn out from the inner circumferential side of the cake 100 toward the converging guide 13. That is, the glass strand S drawn out from the cake 100 is first guided to the yarn path guide device 20 where its traveling direction is changed, and then guided to the converging guide 13.

[0032] The configuration of the yarn path guiding device 20 will be described in detail later.

[0033] The tension device 30 is a device that sequentially measures the length of the roving R being introduced, and when the measured value reaches a predetermined winding length, stops the operation of the winding device 40 and at the same time applies a predetermined tension to stop the progression of the roving R.

[0034] The tension device 30 includes a powder brake type drive roller (not shown) that switches between advancing and stopping the roving R, a side length roller (not shown) that measures the length of the roving R, and the like.

[0035] The roving R guided to the tension device 30 is wound around a powder brake type drive roller and a side length roller in this order, and then sent out again to the outside of the device and guided to the winding device 40.

[0036] The winding device 40 is a device that winds up the roving R, and in this embodiment, for example, is configured by a general roving winder of an automatic turret system. The detailed configuration of the winding device 40 will be omitted.

[0037] In the roving manufacturing apparatus 1 configured as described above, multiple glass strands S·S··· are each pulled out from the inner periphery of the cakes 100·100··· via the yarn path guide devices 20·20···, and are bundled and combined together as they pass through the bundling guide 13, and are gathered into a single roving R. Thereafter, the roving R that has been gathered into one piece is guided in this order through the yarn guide roller 14, the yarn guide wheel 50, the tension device 30, and the winding device 40, where it is wound into a cylindrical shape. In this way, a roving wound body made of a roving R of a predetermined length is manufactured.

[0038] [Configuration of yarn path guide device 20] Next, the configuration of the yarn path guiding device 20 will be described in detail with reference to FIGS. The yarn path guiding device 20 mainly includes a first holder part 21 that guides the glass strand S pulled out from the inner peripheral side of the cake 100 (see FIG. 1) in a predetermined direction (forward in this embodiment), a yarn path direction changing part 22 that changes the traveling direction (yarn path direction) of the glass strand S guided by the first holder part 21, and a second holder part 23 that holds the position of the glass strand S whose traveling direction has been changed by the yarn path direction changing part 22.

[0039] The first holder portion 21 is made of, for example, a cylindrical resin member, and is disposed in the vicinity of each cake 100 held on the creel stand 10 (see FIG. 1) and approximately coaxially with the cake 100. The first holder portion 21 is detachably fixed to and supported by a first support member 24 made of metal on the frame 11 (see FIG. 1) of the creel stand 10.

[0040] The first holder portion 21 is preferably made of a material that causes as little damage as possible to the glass strands S, and in this embodiment, for example, a resin member made of ultra-high molecular weight polyethylene is used.

[0041] Then, the glass strand S pulled out from the cake 100 is inserted into the inner diameter side of the first holder part 21 and is guided by the first holder part 21 in a predetermined direction (forward direction).

[0042] The shape of the first holder portion 21 is not limited to that of this embodiment, and any shape can be adopted as long as it is a hollow cylindrical shape. For example, instead of the cylindrical shape, a square cylindrical shape or the like may be used.

[0043] The yarn guide direction changing section 22 has a changing section 22a that changes the traveling direction of the glass strand S, and a fixing section 22b that fixes the changing section 22a to the first holder section 21.

[0044] The converting portion 22a is made of, for example, a metal member (for example, SUS material) in the shape of a strip curved in the longitudinal direction, and has a curved surface 22a1 that allows the glass strand S to slide against it. The fixing portion 22b is made of, for example, a metal member having a circular ring shape, and its inner diameter is formed to be substantially equal to the outer diameter of the first holder portion .

[0045] The curved surface 22a1 of the converting portion 22a is subjected to a quenching process to improve the abrasion resistance against the glass strand S.

[0046] The conversion portion 22a is arranged to extend from the outer edge of the fixed portion 22b toward one axial side of the fixed portion 22b (the front side in this embodiment) and toward the radial outside of the fixed portion 22b (the right side in this embodiment), and is formed integrally with the fixed portion 22b.

[0047] The yarn path direction changing section 22 is fitted coaxially with the first holder section 21 via a fixing section 22b at the end (in this embodiment, the front end) of the first holder section 21 downstream in the traveling direction of the glass strand S. In addition, the yarn path direction changing portion 22 is held by the first holder portion 21 with the changing portion 22a extending toward one axial side (front side) of the first holder portion 21 and toward the radially outer side (right side) of the first holder portion 21.

[0048] Then, the glass strand S that has passed through the first holder portion 21 comes into sliding contact with the curved surface 22a1 of the yarn guide direction changing portion 22, and has its traveling direction changed by the yarn guide direction changing portion 22.

[0049] As described above, in this embodiment, the yarn path direction changing section 22 has a curved surface 22a1 that changes the traveling direction of the glass strand S while making sliding contact with the glass strand S.

[0050] By having such a configuration, the yarn path guide device 20 in this embodiment can relatively gently change the traveling direction of the glass strand S via the curved surface 22a1 without placing an excessive burden on the glass strand S.

[0051] The second holder portion 23 has an eyelet 23a through which the glass strand S can be inserted, a second support member 23b that is fixed to the turning portion 22a of the yarn path direction turning portion 22 and supports the eyelet 23a, and a rotation means 23c that enables the eyelet 23a to rotate around an axis relative to the second support member 23b.

[0052] The eyelet 23a is made of, for example, a resin member having a substantially hollow cylindrical shape, and its inner diameter is about 1.8 mm, which is slightly larger than the fiber diameter of the glass strand S. Here, the material of the eyelet 23a is not limited to that of this embodiment, and may be formed, for example, from a metal member (e.g., SUS material, etc.) or other member, similar to the yarn path direction changing section 22, but it is preferable that it be formed from a resin member.

[0053] The material of the eyelet 23a is preferably one that causes as little damage as possible to the glass strand S, and in this embodiment, for example, a ceramic member is used.

[0054] By using the eyelet 23a made of such a resin member, the yarn path guide device 20 of this embodiment can stably maintain the traveling direction of the glass strand S, which has been changed by the yarn path direction changing section 22, via the eyelet 23a without generating excessive frictional resistance, as will be described later.

[0055] The second support member 23b is made of, for example, a substantially L-shaped member, and has an attachment portion 23b1 to which the eyelet 23a is attached, and an attachment portion 23b2 that protrudes in a direction substantially perpendicular to the attachment portion 23b1.

[0056] The mounting portion 23b1 is provided with a through-hole 23b1a that penetrates in the thickness direction, and the eyelet 23a is fitted into the through-hole 23b1a via the rotating means 23c, thereby being mounted on the mounting portion 23b1.

[0057] At the end of the yarn path direction changing section 22 downstream in the direction of travel of the glass strand S, i.e., at the end of the changing section 22a in the extension direction, the second support member 23b is detachably fixed to the changing section 22a via the mounting portion 23b2 using a fastening member such as a bolt.

[0058] Specifically, the second support member 23b is removably fixed to the conversion portion 22a with the eyelet 23a attached and the attachment portion 23b2 abutting against the back surface (rear surface in this embodiment) of the conversion portion 22a. As a result, the eyelet 23a is supported by the turning portion 22a of the yarn path direction turning portion 22 via the second support member 23b, with its axial direction approximately aligned with the direction of travel of the glass strand S (more precisely, the tangential direction at the end of the extension direction of the turning portion 22a, which in this embodiment is the left-right direction) at the end of the extension direction of the turning portion 22a. Therefore, by inserting the glass strand S that has passed through the yarn path direction change section 22 into the eyelet 23a, the position of the glass strand S, whose traveling direction has been changed by the yarn path direction change section 22, is reliably maintained by the eyelet 23a.

[0059] As described above, in this embodiment, the yarn path direction change section 22 is configured to include a second holder section 23 (more specifically, an eyelet 23a) that is provided at the end downstream in the traveling direction of the glass strand S and that holds the position of the glass strand S whose traveling direction has been changed by the yarn path direction change section 22.

[0060] By having such a configuration, the yarn path guide device 20 in this embodiment can reliably hold the traveling direction of the glass strand S, which has been changed by the yarn path direction changing section 22, via the second holder section (eyelet 23a).

[0061] In this embodiment, the second holder portion 23 has an eyelet 23a through which the glass strand S can be inserted.

[0062] With such a configuration, according to the yarn path guide device 20 of the present embodiment, the second holder part 23 is configured using the eyelet 23a, which is generally an inexpensive general-purpose product, and therefore the yarn path guide device 20 can be constructed relatively inexpensively.

[0063] The rotation means 23c consists of a bearing member 23c1, for example, a bearing or bushing, and its inner diameter is approximately equal to the outer diameter of the eyelet 23a, and its outer diameter is also approximately equal to the inner diameter of the through hole 23b1a at the mounting portion 23b1 of the second support member 23b.

[0064] The rotation means 23c is fitted into the through-hole 23b1a of the mounting portion 23b1 of the second support member 23b. The eyelet 23a is detachably fitted into the rotating means 23c. As a result, the eyelet 23a is configured to be rotatable about the axis relative to the second support member 23b via the rotation means 23c.

[0065] As described above, in this embodiment, the second holder portion 23 is configured to have a rotation means 23c that allows the eyelet 23a to rotate about the axis.

[0066] By having such a configuration, according to the yarn path guide device 20 of this embodiment, even if, for example, a localized worn spot occurs on the inner surface of the eyelet 23a due to the sliding of the glass strand S, by rotating the eyelet 23a via the rotation means 23c, the glass strand S can be caused to slide again and again at a spot on the inner surface that avoids the worn spot, thereby extending the service life of the yarn path guide device 20.

[0067] Furthermore, as described above, the eyelet 23a is detachably inserted into the rotating means 23c. Therefore, for example, if the eyelet 23a exceeds its usage limit, it is only necessary to replace the eyelet 23a alone, without having to replace the entire eyelet together with the yarn path direction changing section 22, thereby reducing equipment costs.

[0068] Furthermore, in this embodiment, the rotation means 23c is configured to include a bearing member 23c1 fitted onto the outside of the eyelet 23a.

[0069] With such a configuration, according to the yarn path guide device 20 of the present embodiment, the rotation means 23c is configured using the bearing member 23c1, which is generally an inexpensive general-purpose product, so that the yarn path guide device 20 can be constructed relatively inexpensively.

[0070] As described above, the yarn path guide device 20 in this embodiment is a yarn path guide device that guides the traveling direction (yarn path direction) of the glass strand S pulled out from the inner peripheral side (e.g., inner peripheral surface 100a) of the cylindrical cake (glass strand wound body) 100, and is configured to include a hollow cylindrical first holder portion 21 through which the glass strand S is inserted, and a yarn path direction changing portion 22 that is provided at the end (front end) of the first holder portion 21 on the downstream side in the traveling direction of the glass strand S and changes the traveling direction of the glass strand S.

[0071] The glass strand S pulled out from the cake 100 is first guided in a predetermined direction (forward) by the first holder section 21, and then its direction of travel is changed by the yarn path direction changing section 22, after which it passes through the eyelet 23a and is guided to the aforementioned focusing guide 13 (see Figure 1).

[0072] With this configuration, the yarn path guide device 20 in this embodiment can guide the glass strand S pulled out from the cake (glass strand wound body) 100 to a predetermined position by the first holder section 21, and then change the traveling direction (yarn path direction) of the glass strand S to a desired direction by the yarn path direction changing section 22. Therefore, even if the glass strand S is pulled out while the position at which it is peeled off from the inner periphery of the cake (glass strand wound body) 100 is constantly moving along the inner periphery, the glass strand S can be stably guided by the first holder section 21 to the yarn path direction change section 22, which changes the direction of travel (yarn path direction) of the glass strand S, without flapping as in the past.This prevents fuzzing and the like from occurring, and allows the direction of travel of the glass strand S to be changed without causing any deterioration in quality.

[0073] Furthermore, the method for manufacturing a roving wound body carried out by the roving manufacturing apparatus 1 in this embodiment is characterized in that a plurality of glass strands S·S···, each drawn out from a cake (glass strand wound body) 100·100···, are bundled together and doubling via the above-mentioned yarn path guide devices 20·20···.

[0074] With this configuration, according to the manufacturing method of the roving wound body in this embodiment, the above-mentioned yarn path guide device 20 can stably pull out and bundle each glass strand S·S··· from a plurality of cakes (glass strand wound bodies) 100·100···, thereby obtaining a high-quality roving wound body.

[0075] Furthermore, the roving wound body manufactured by the roving manufacturing apparatus 1 in this embodiment is characterized in that it is formed by bundling together and winding up a roving R made by multiple glass strands S·S···, each drawn out from a cake (glass strand wound body) 100·100···, via the above-mentioned yarn path guide devices 20·20···.

[0076] In this way, the roving wound body in this embodiment is a high-quality roving wound body that is manufactured by stably pulling out and bundling each glass strand S·S··· from multiple cakes (glass strand wound bodies) 100·100··· using the above-mentioned yarn path guide device 20.

[0077] The above describes one embodiment of the present invention, but the present invention is not limited to such an embodiment, which is merely an example, and it goes without saying that the present invention can be embodied in various other forms without departing from the gist of the present invention. The scope of the present invention is indicated by the claims, and further includes the meaning of equivalents set forth in the claims, and all modifications within the scope of the claims. [Explanation of symbols]

[0078] 100 cakes (glass strand wound body) 100a Inner surface 20 Yarn guide device 21 First holder part 22 Yarn path direction change section 22a1 curved surface 23 Second holder part 23a eyelet 23c Rotation means 23c1 Bearing materials S Glass Strand

Claims

1. A yarn guide device that guides the traveling direction of a glass strand drawn out from the inner peripheral side of a cylindrical glass strand winding body, a first holder portion having a hollow cylindrical shape through which the glass strand is inserted; a yarn path direction changing section provided at an end of the first holder section on a downstream side in a traveling direction of the glass strand, the yarn path direction changing section changing the traveling direction of the glass strand, A yarn guide device characterized by the above.

2. The yarn path direction changing section is a curved surface that changes the direction of travel of the glass strand while sliding against the glass strand; 2. The yarn guide device according to claim 1, wherein:

3. The yarn guide direction changing section is provided at an end portion on the downstream side in the traveling direction of the glass strand, The glass strand winding device further includes a second holder portion that holds the position of the glass strand whose traveling direction has been changed by the yarn guide direction changing portion.

3. The yarn path guide device according to claim 1 or 2.

4. The second holder portion includes: an eyelet through which the glass strand can be inserted; 4. The yarn guide device according to claim 3, wherein:

5. The second holder portion includes: Further, the eyelet may be rotated around an axis.

5. The yarn guide device according to claim 4, wherein:

6. The rotating means is A bearing member fitted onto the eyelet.

6. The yarn path guide device according to claim 5, wherein:

7. The eyelet is made of a resin member.

5. The yarn guide device according to claim 4, wherein:

8. a yarn guide device according to claim 1 or 2, wherein a plurality of glass strands respectively drawn out from the glass strand winding body are bundled together and doubling; A method for producing a roving wound body, comprising:

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