JP2010089954A - Thread passage guide device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thread passage guide device stabilizing and changing a direction of a thread passage without causing malfunction such as entanglement of single fibers, twisting, and scuffing without applying unnecessary external force to a fiber bundle when winding a tape like fiber bundle having a widened flat cross sectional shape such as flat thread on a bobbin. <P>SOLUTION: The thread passage guide device is equipped with at least a first guide roll 6 disposed in an upstream side, a third guide roll 7 disposed in a downstream side, and a second guide roll 2 disposed between the first and third guide rolls, and it guides a running fiber bundle. The second guide roll 2 is rotatably supported on a support member 3 having a rotary shaft A orthogonal to rotary shafts of the first and third guide rolls. A rotary shaft of the second guide roll 2 is disposed on a single plane orthogonal to the rotary shaft A of the support member, and the fiber bundle is automatically controlled to an original thread passage by rotating the support member around the rotary shaft A in correspondence to fluctuation of a thread passage, and tilting the second guide roll 2 toward a thread passage crossing direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  In the present invention, for example, when winding a tape-like fiber bundle having a flat cross-sectional shape that is widened like a flat yarn around a bobbin, entanglement between single fibers without applying unnecessary external force to the fiber bundle, The present invention relates to a yarn path guide device that is effective in stabilizing and changing the direction of a yarn path without causing problems such as twisting and fluffing.

  Many of the fibers used for resin reinforcement represented by carbon fibers and glass fibers (hereinafter referred to as reinforcing fibers) are impregnated with a matrix resin in a bundle of these fibers (hereinafter referred to as reinforcing fiber bundle) to form a so-called prepreg. Thereafter, this is preformed into a predetermined shape and cured by heating to produce a fiber-reinforced plastic molded product.

  In recent years, with the intention of reducing the weight of the fiber-reinforced plastics molded body, a high-quality prepreg having a small thickness and a small thickness unevenness has been demanded.

  When manufacturing such a prepreg, it is necessary to open thinly and widely in an untwisted state in order to exhibit the high elastic characteristics of each single fiber constituting the reinforcing fiber bundle.

  For this reason, it is an important issue that the reinforcing fiber bundle as the raw material of the prepreg is wound on the bobbin in a state where it is spread thinly and uniformly in advance and provided to the prepreg manufacturing process while maintaining the state. It is coming.

  In order to realize the handling of such fiber bundles, it is particularly important not to apply unnecessary external force to the fiber bundles when transporting and guiding the fiber bundles. For example, the yarn path is regulated by a roll with a hook or the like. In such a case, the fiber bundle is rubbed and folded, which may cause problems and is not necessarily good. Therefore, it is common to use a wide guide roll that allows for fluctuations in the yarn path, that is, allows the fluctuations in the yarn path.

  However, on the other hand, fluctuations in the yarn path causes a reduction in the quality of the take-up package, so stabilization of the yarn path has become an important issue.

  Further, when the fiber bundle runs obliquely on the guide roll, the yarn path is rubbed to deteriorate the yarn quality, so that stabilization of the yarn path is also an important issue.

As a conventional technique, for example, International Publication No. 2005/073118 (Patent Document 1) includes a guide roll and a support member that supports the guide roll, and the support member is twisted at a right angle with respect to the rotation axis of the guide roll. The guide roll is tilted with respect to the yarn path by rotation about the rotation axis of the support member in response to fluctuations in the yarn path. A yarn path guide configured to be automatically guided in the yarn path direction is disclosed.
International Publication No. 2005/073118 Pamphlet

  However, the yarn path guide disclosed in the above-mentioned Patent Document 1 has a range corresponding to the fluctuation of the yarn path in order to cope with the fluctuation of the yarn path by the rotation shaft having a position twisted at right angles to the rotation axis of the guide roll. In addition to being narrow, they are twisted in a sheet-like fiber bundle yarn group, and are unsuitable for aligning by changing direction while preventing folding.

  In the present invention, for example, when winding a tape-like fiber bundle having a flat cross-sectional shape that is widened like a flat yarn around a bobbin, entanglement between single fibers without applying unnecessary external force to the fiber bundle, The purpose is to stabilize and change the direction of the yarn path without causing problems such as twisting and fluffing.

  The first basic configuration of the present invention includes a first guide roll disposed on the upstream side, a third guide roll disposed on the downstream side, and a second guide disposed between the first and third guide rolls. A yarn path guide device that guides a traveling fiber bundle, wherein the first to third guide rolls are arranged in parallel to each other, and the second guide rolls are parallel to each other. It is rotatably supported by a support member having a rotation axis A orthogonal to the rotation axes of the first and third guide rolls, and the rotation axis of the second guide roll is the rotation axis A of the support member. The second guide roll is inclined in the width direction of the yarn path by the rotation of the support member with the rotation axis A as the rotation center corresponding to the fluctuation of the yarn path. , So that the fiber bundle is automatically guided in the original yarn path direction Made is composed of, in yarn guide apparatus, characterized in that.

  In addition, the second basic configuration of the present invention includes a first guide roll disposed on the upstream side, a third guide roll disposed on the downstream side, and a first guide roll disposed between the first and third guide rolls. A guide device for guiding a traveling fiber bundle, wherein the first to third guide rolls are arranged in parallel to each other, and the second guide rolls are parallel to each other. A support member having a first rotation axis A ′ orthogonal to the rotation axes of the first and third guide rolls and a second rotation axis B parallel to the first and third guide rolls is rotatable. The rotation axis of the second guide roll is arranged on a plane orthogonal to the rotation axis A ′ of the support member, and the first and the second of the support member correspond to fluctuations in the yarn path. The second gear is rotated by rotation about the second rotation axis A ′, B. A yarn path guide characterized in that the roll is tilted in the direction of the width of the yarn path and simultaneously moved in the direction of the thread path so that the fiber bundle is automatically guided in the original direction of the thread path. In the device.

  According to a preferred aspect, an angle θ1 formed between the rotation axis A of the support member and the yarn path entering the second guide roll, and an angle formed between the rotation axis A and the yarn path exiting from the second guide roll. θ2 is made equal. Moreover, it is preferable that the distance between the rotation axis of the second guide roll and the rotation axis A of the support member is 20 mm or more. Further, it is desirable that an angle θ3 formed by a rotation axis of the second guide roll and a yarn path is in a range of 45 ° to 135 °, and further, a yarn path entering the guide roll and a yarn exiting from the second guide roll. The holding angle θ4 with the road is preferably 10 ° to 180 °.

  According to the present invention, of the first to third guide rolls, the second guide roll corresponds to the fluctuation amount of the yarn path, and the width direction of the yarn path is centered on the first rotation axis via the support member. Or in the direction of the width of the yarn path around the first rotation axis and at the same time move in the direction of the yarn path, and automatically move the fiber bundle to the normal yarn path position according to these movements. In order to return to, for example, when winding a tape-like fiber bundle having a flat cross-sectional shape that is widened, such as a flat yarn, without applying unnecessary external force to the fiber bundle, entanglement between single fibers, Stabilizes the yarn path without causing problems such as twisting and fluffing, and also has a wide range to cope with fluctuations in the yarn path, and twists and turns the sheet-like fiber bundle yarn group while changing the direction. Can be aligned.

Hereinafter, typical embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view schematically showing the overall structure of a yarn guide device 1 according to the first embodiment of the present invention. The yarn path guide device 1 is an original yarn path of the traveling fiber bundle Y (refers to a thread path determined by the support positions of the traveling fiber bundle upstream and downstream, and the traveling path of the fiber bundle Y set based on the configuration of the apparatus. This yarn path does not need to be a straight line and includes a region and a range.) First to third guide rolls 6, 2, 7 sequentially arranged from the upstream side to the downstream side along have. As shown in FIG. 2, these first to third guide rolls 6, 2, and 7 are arranged in parallel to each other in the fiber width direction, and each rotation shaft of the first and third guide rolls has both ends thereof. Each is rotatably supported via a fixed bearing (not shown). On the other hand, the second guide roll is rotatably supported by a shaft portion 3a of a support member 3 having a rotation axis A at the upper end.

  As shown in FIGS. 1 to 3, the axis of the rotation axis A of the support member 3 faces a twisted position perpendicular to the rotation axes of the first and third guide rolls 6 and 7. That is, the axis of the second guide roll 2 supported by the support member 3 is arranged on one plane orthogonal to the rotation axis A, as shown in FIGS. Therefore, the support member 3 can be rotated (oscillated) about the rotation axis A in a direction orthogonal to the traveling direction of the fiber bundle Y, and as shown in FIG. It behaves so as to incline in the width direction with respect to the fiber bundle. Due to the inclination of the second guide roll 2, the fiber bundle is automatically guided toward the center of the original yarn path.

  Next, the yarn path guide device 11 according to the second embodiment of the present invention will be described in detail with reference to FIGS. FIG. 5 is a perspective view schematically showing the overall structure of the yarn path guide device 1 according to the second embodiment of the present invention. In addition, in this embodiment, the same code | symbol is attached | subjected about the member provided with the structure substantially the same as the said 1st Embodiment.

  The yarn path guide device 11 according to the present embodiment also includes first to third guide rolls 6, 2, and 7 that are sequentially arranged from the upstream side to the downstream side along the original yarn path of the traveling fiber bundle Y. Have. As shown in FIG. 5, the first to third guide rolls 6, 2, 7 are arranged in parallel with each other with the axis line oriented in a direction crossing the original yarn path. Both ends of the rotary shafts of the first and third guide rolls 6 and 7 are rotatably supported via fixed bearings (not shown). On the other hand, as shown in FIGS. 5 to 7, the second guide roll 2 is more than a plane including the first and third guide rolls 6, 7 between the first and third guide rolls 6, 7. Similar to the first and third guide rolls 6, 7, the axis thereof is directed in the fiber width direction across the original yarn path. The second guide roll 2 is rotatably supported on the rotation shaft portion 3a of the support member 3 via a bearing (not shown).

In the present embodiment, the difference from the first embodiment is that the support member 3 has a new second rotation in addition to the first rotation axis A ′ having the same structure as the first embodiment. It has an axis B.
That is, the support member 3 has a first rotation axis A ′ at the upper end thereof as in the first embodiment, and the direction of the axis of the first rotation axis A ′ is shown in FIGS. As shown in FIG. 7, the first and third guide rolls 6, 7 are twisted at 90 ° perpendicular to each rotation axis. The support member 3 has a rotation shaft portion of the second guide roll 2 disposed on the lower end of the first rotation axis A ′ and the lower support member, in addition to the first rotation axis A ′ disposed on the upper end thereof. A second rotation axis B is provided between the first rotation axis 3a and the second rotation axis B. As shown in FIGS. 6 and 7, the direction of the axis of the second rotation axis B is oriented in a direction twisted by 90 ° with respect to the axis of the first rotation axis A ′. It is parallel to the axis of the guide roll 2.

  Therefore, the support member 3 is capable of rotating (swinging) in the width direction of the fiber bundle Y that crosses the yarn path around the first rotation axis A ′ in response to fluctuations in the yarn path. At the same time, as shown in FIG. 6, the fiber bundle Y swings around the second rotation axis B in the traveling direction. As a result, the second guide roll 2 behaves so as to incline in the width direction with respect to the fiber bundle Y, and simultaneously swings in the traveling direction of the fiber bundle Y. The automatic movement of the second guide roll 2 automatically guides the fiber bundle Y in the center direction of the original yarn path. The second guide roll 2 rotates about the first rotation axis A ′ of the support member 3 and the second rotation axis B about the rotation center, so that the second guide roll 2 moves in the width direction of the yarn path and the yarn path. A composite operation inclined in the direction is taken, and the fiber bundle Y is automatically guided toward the center of the original yarn path while avoiding the ironing action of the fiber bundle Y. In view of the above, in the first and second embodiments, the second guide roll 2 is configured to be a free rotating roll that can be subordinately rotated following the traveling speed of the yarn. preferable. This has less squeezing action on the yarn and less adversely affects the yarn quality. The shape of the second guide roll 2 is preferably a columnar shape. The cylindrical shape does not cause a difference in peripheral speed on the roll surface as in the case where a conical or drum-shaped roll is used, and hardly adversely affects the yarn quality.

  Next, the angle θ1 formed by the rotation axis A and the first rotation axis A ′ of the support member 3 and the yarn path entering the second guide roll 2, the rotation axis A and the first rotation axis A ′, and the above-mentioned It is preferable that the angle θ2 formed by the yarn path exiting from the second guide roll 2 is substantially equal. Here, the fact that the angles θ1 and θ2 are substantially equal does not require that the angles are completely equal, and may be within a range of ± 5 °. By adopting such a configuration, the fiber bundle Y can be guided effectively and appropriately in the original yarn path direction. In particular, when the support member 3 in the second embodiment has the second rotation axis B in addition to the first rotation axis A ′, the first rotation axis A ′ can be rotated. Even when the rotation of the second rotation axis B is added and the yarn path deviates from the original yarn path and greatly fluctuates between the angle θ1 and the angle θ2 beyond the allowable range, the second guide roll 2 includes a second rotation operation in addition to the rotation operation of the first rotation axis A ′, and the angle θ1 formed by the yarn path entering the guide roll 2 and the rotation axis A and the guide roll 2 The posture of the fiber bundle Y can be corrected quickly and accurately so that the angle θ2 formed by the outgoing yarn path is automatically made equal.

  The distance L between the rotation axis of the second guide roll 2 and the rotation axis A and the first rotation axis A ′ of the support member 3 is preferably 20 mm or more. By setting it to 20 mm or more, the region / range for yarn path fluctuations is widened, which is preferable. More preferably, it is 30 mm or more, More preferably, it is 50 mm or more. As the distance L between the rotation axis of the second guide roll 2 and the rotation axis A and the first rotation axis A ′ of the support member 3 is longer, the region / range for yarn path variation becomes wider. The place where the support member 3 is installed including the second guide roll 2 is appropriately determined.

  Furthermore, it is preferable that the angle θ3 formed by the rotation axis of the second guide roll 2 and the yarn path is in the range of 45 ° to 135 °. By setting the numerical value range, rubbing between the roll surface and the yarn is less likely to occur, and the problem that the fiber bundle Y rolls due to fluctuations in tension or the like is unlikely to occur. Etc. occur and the traveling position of the fiber bundle is not stable. More preferably, it is 55 ° to 125 °, and further preferably 60 ° to 120 °.

  Moreover, it is preferable that the holding angle θ4 of the yarn path entering the second guide roll 2 and the yarn path exiting from the guide roll is 10 ° to 180 °. By making this range, when the second guide roll 2 is inclined, the change in the angle formed by the yarn path entering the second guide roll 2 and the ridge line of the second guide roll 2 becomes large, and effectively It is possible to guide the fiber bundle in the original yarn path direction. More preferably, it is 20 ° to 180 °, and further preferably 30 ° to 180 °.

Next, examples of the present invention will be described more specifically.
The measurement of the yarn path variation is performed by measuring both end positions of the fiber bundle width, and using the center value as the center of the fiber bundle, the yarn path variation length is the center value of the first guide roll 6 and the center value of the third guide roll Good distance between. The deviation in the roll axis direction of the center value of the fiber bundle was defined as the amount of variation in the yarn path.

Example 1
Using the guide roll group as shown in FIG. 1, the acrylonitrile-based precursor fiber bundle having 12,000 filaments is converted into a flame-resistant fiber bundle by a flame-proofing process in which heat treatment is performed in an oxidizing atmosphere at 200 to 300 ° C., Subsequently, it passes through a pre-carbonization furnace comprising a nitrogen atmosphere having a temperature distribution of 300 to 700 ° C., followed by passing through a carbonization furnace comprising a nitrogen atmosphere having a temperature distribution of 1,000 to 1,350 ° C. The ten carbon fiber bundles to which a sizing agent mainly composed of a resin was added were conveyed and guided.

  The carbon fiber bundle is supplied from an upstream conveyance roll (not shown) and conveyed to a downstream conveyance roll (not shown). Here, the first guide roll 6 on the upstream side and the third guide roll 7 on the downstream side across the second guide roll 2 are free rotating rolls having an outer diameter of 50 mm and a roll width of 100 mm, respectively, and their shaft ends are fixed. Fixed to the mounting bracket.

  The second guide roll 2 is the most important constituent member of the yarn guide device 1 according to the present invention. The second guide roll 2 is a free rotating roll having an outer diameter of 50 mm and a roll width of 100 mm. It has a moving axis A. The rotation axis of the second guide roll 2 is included in a single orthogonal plane perpendicular to the rotation axis A, and the support member 3 is rotatably supported by the shaft portion 3a at the lower end of the bracket via a bearing. Has been.

  An angle (θ1) formed between the rotation axis A and the yarn path entering the second guide roll 2 and an angle (θ2) formed between the rotation axis A and the yarn path exiting from the guide roll are 45 °, respectively. The distance between the rotation axis and the rotation axis A is 100 mm, the angle (θ3) between the rotation axis of the guide roll and the yarn path is 65 °, the thread path entering the guide roll, and the holding angle of the thread path exiting from the guide roll (Θ4) was set to 90 °. The results are shown in Table 1.

(Examples 2 to 14)
The fiber bundle was conveyed and guided in the same manner as in Example 1 except that the conditions shown in Table 1 were changed using the yarn path guide device shown in FIG. The results are shown in Tables 1 and 2.

(Example 15)
The fiber bundle was conveyed and guided in the same manner as in Example 1 except for the following matters.
The carbon fiber bundle Y is a single tape-like carbon fiber bundle, the second guide roll 2 is a free rotating roll having an outer diameter of 30 mm and a roll width of 60 mm, and the rotation shaft of the second guide roll 2 and the rotation of the support member 3 are rotated. The distance L from the axis A was 50 mm. The results are shown in Table 2.

(Example 16)
The fiber bundle was conveyed and guided in the same manner as in Example 1 except for the following matters.
The carbon fiber bundle Y is made into 30 tape-like carbon fiber bundles, the second guide roll 2 is a free rotating roll having an outer diameter of 50 mm and a roll width of 120 mm, and the rotation shaft of the second guide roll 2 and the rotation of the support member 3 are rotated. The distance L from the axis A was set to 300 mm. The results are shown in Table 2.

(Example 17)
The fiber bundle was conveyed and guided in the same manner as in Example 1 except for the following matters.
An acrylonitrile-based precursor fiber bundle having 60,000 filaments is used to form a carbon fiber bundle, ten tape-like carbon fiber bundles, and the second guide roll 2 is a free rotating roll having an outer diameter of 50 mm and a roll width of 180 mm. did. The results are shown in Table 2.

(Example 18)
The fiber bundle was conveyed and guided in the same manner as in Example 1 except for the following matters.
An acrylonitrile-based precursor fiber bundle having 12,000 filaments was used to form a flame resistant fiber bundle, and 10 tape-shaped flame resistant fiber bundles were formed.
The flame resistant fiber is supplied from an upstream conveyance roll (not shown) and conveyed to a downstream conveyance roll (not shown). The results are shown in Table 2.

(Example 19)
Example 19 is a specific example of the second embodiment of the present invention shown in FIGS. 5 to 8, and the fiber bundle was conveyed and guided in the same manner as in Example 1 except for the following matters.
The second guide roll 2 is the most important constituent member in the embodiment, and is a free rotating roll having an outer diameter of 50 mm and a roll width of 100 mm. The support member 3 is the device 1 shown in FIG. 5 and has first and second rotation axes A ′ and B. The rotation axis of the second guide roll 2 is included in a single plane orthogonal to the first rotation axis A ′ of the support member 3, and the second rotation axis B is in the first rotation axis A ′. The first and second rotation axes A ′ and B were fixed to the bracket of the support member 13 through bearings, respectively, at a position twisted by 90 °. The results are shown in Table 3.

(Examples 20 to 30)
The fiber bundle was conveyed and guided in the same manner as in Example 19 except that the conditions were changed to those shown in Table 1. The results are shown in Table 3.

(Example 31)
The fiber bundle was conveyed and guided in the same manner as in Example 19 except for the following matters.
The carbon fiber bundle is a single tape-like carbon fiber bundle, the second guide roll 2 is a free rotating roll having an outer diameter of 30 mm and a roll width of 60 mm, and the rotation axis of the second guide roll 2 and the first rotation axis A ′. The distance L between them was 50 mm. The results are shown in Table 4.

(Example 32)
The fiber bundle was conveyed and guided in the same manner as in Example 19 except for the following matters.
The carbon fiber bundle is 30 tape-like carbon fiber bundles, the second guide roll 2 is a free rotating roll having an outer diameter of 50 mm and a roll width of 120 mm, and the rotation axis of the second guide roll 2 and the first rotation axis A ′. The distance L between them was set to 300 mm. The results are shown in Table 4.

(Example 33)
The fiber bundle was conveyed and guided in the same manner as in Example 19 except for the following matters.
An acrylonitrile-based precursor fiber bundle having 60,000 filaments is used to form a carbon fiber bundle, and 10 tape-like carbon fiber bundles are formed. The second guide roll 2 is a free rotating roll having an outer diameter of 50 mm and a roll width of 180 mm. did. The results are shown in Table 4.

(Example 34)
The fiber bundle was conveyed and guided in the same manner as in Example 19 except for the following matters.
An acrylonitrile-based precursor fiber bundle having 12,000 filaments was used to form a flame resistant fiber bundle, and 10 tape-shaped flame resistant fiber bundles were formed.
The flame resistant fiber is supplied from an upstream conveyance roll (not shown) and conveyed to a downstream conveyance roll (not shown). The results are shown in Table 4.

(Example 35)
The fiber bundle was conveyed and guided in the same manner as in Example 19 except for the following matters.
A nitrile precursor fiber bundle having 12,000 filaments is converted into a flame-resistant fiber bundle by a heat-resistant process in which heat treatment is performed in an oxidizing atmosphere at 200 to 300 ° C., and subsequently a nitrogen atmosphere having a temperature distribution of 300 to 700 ° C. A carbon fiber bundle to which a sizing agent mainly composed of an epoxy resin is applied by passing through a pre-carbonization furnace comprising, followed by passing through a carbonization furnace comprising a nitrogen atmosphere having a temperature distribution of 1,000 to 1,350 ° C. The 10 tape-shaped carbon fiber bundles were conveyed and guided to the DW prepreg manufacturing apparatus.
The carbon fiber bundle is supplied from an upstream conveyance roll (not shown) and conveyed to a downstream conveyance roll (not shown). The results are shown in Table 4.

(Example 36)
The fiber bundle was conveyed and guided in the same manner as in Example 19 except for the following matters.
A nitrile precursor fiber bundle having 60,000 filaments is converted into a flame-resistant fiber bundle by a flame-proofing process in which heat treatment is performed in an oxidizing atmosphere at 200 to 300 ° C., and subsequently a nitrogen atmosphere having a temperature distribution of 300 to 700 ° C. A carbon fiber bundle to which a sizing agent mainly composed of an epoxy resin is applied by passing through a pre-carbonization furnace comprising, followed by passing through a carbonization furnace comprising a nitrogen atmosphere having a temperature distribution of 1,000 to 1,350 ° C. The 10 tape-shaped carbon fiber bundles were conveyed and guided to the DW prepreg manufacturing apparatus.
The carbon fiber bundle is supplied from an upstream conveyance roll (not shown) and conveyed to a downstream conveyance roll (not shown). The results are shown in Table 4.

(Example 37)
The fiber bundle was conveyed and guided in the same manner as in Example 19 except for the following matters.
Ten tape-like acrylonitrile-based precursor fiber bundles were used as acrylonitrile-based precursor fiber bundles having 60,000 filaments.
The acrylonitrile-based precursor fiber bundle is supplied from an upstream conveyance roll (not shown) and conveyed to a downstream conveyance roll (not shown). The results are shown in Table 4.

(Comparative Example 1)
The fiber bundle was conveyed and guided in the same manner as in Example 1 except for the following matters.
The rotation shaft of the second guide roll 2 was directly fixed to the bracket of the support member 3 without using a bearing. The results are shown in Table 5.

(Comparative Example 2)
The fiber bundle was conveyed and guided in the same manner as in Example 19 except for the following matters.
The rotation shaft of the second guide roll 2 was directly fixed to the bracket of the support member 3 without using a bearing. The results are shown in Table 5.

It is the schematic perspective view which showed the whole structure of the yarn path guide apparatus which concerns on 1st Embodiment of this invention. It is the front view which looked at the yarn path guide device concerning a 1st embodiment in the direction crossing a yarn path. It is the front view which looked at the yarn path guide device from the thread path direction downstream side. It is a yarn path fluctuation explanatory view exaggeratingly showing the relative positional relationship between the second guide roll and the third guide roll when the yarn path fluctuates. It is the schematic perspective view which showed the whole structure of the yarn path guide apparatus which concerns on 2nd Embodiment of this invention. It is the front view which looked at the yarn path guide apparatus which concerns on 2nd Embodiment in the thread path crossing direction. It is the front view which looked at the yarn path guide device from the thread path direction downstream side. It is a yarn path fluctuation explanatory view exaggeratingly showing the relative positional relationship between the second guide roll and the third guide roll when the yarn path fluctuates.

Explanation of symbols

1,11 Yarn Guide 2 Second Guide Roll 3 Support Member 3a Shaft 6 Upstream First Guide Roll 7 Downstream Third Guide Roll A Support Member Rotation Axis A 'Support Member First Rotation Axis B The second rotation axis θ1 of the support member The angle θ2 formed by the yarn path entering the second guide roll from the first guide roll θ2 The angle formed by the yarn path extending from the second guide roll to the third guide roll θ3 The rotation axis of the guide roll Angle θ4 formed by the yarn path The holding angle L with respect to the second guide roll between the yarn path entering the second guide roll from the first guide roll and the yarn path exiting from the third guide roll L Rotation axis and rotation axis of the second guide roll Distance Y between A (first rotation axis) Fiber bundle

Claims (6)

A fiber bundle that travels at least including a first guide roll disposed on the upstream side, a third guide roll disposed on the downstream side, and a second guide roll disposed between the first and third guide rolls. A yarn path guide device for guiding
The first to third guide rolls are arranged in parallel with each other in a top view,
The second guide roll is rotatably supported by a support member having a rotation axis A orthogonal to the rotation axes of the first and third guide rolls parallel to each other.
The rotation shaft of the second guide roll is disposed on a plane orthogonal to the rotation axis A of the support member,
Corresponding to the variation in the yarn path, the second guide roll is tilted in the width direction of the yarn path by the rotation of the support member about the rotation axis A, and the fiber bundle is in the original yarn path direction. Configured to be automatically guided to
A yarn path guide device characterized by that. A fiber bundle that travels at least including a first guide roll disposed on the upstream side, a third guide roll disposed on the downstream side, and a second guide roll disposed between the first and third guide rolls. A yarn path guide device for guiding
The first to third guide rolls are arranged in parallel with each other in a top view,
The second guide roll includes a first rotation axis A ′ orthogonal to the rotation axes of the first and third guide rolls parallel to each other, and a second rotation axis B parallel to the first and third guide rolls. And is rotatably supported by a support member having
The rotation shaft of the second guide roll is disposed on a plane orthogonal to the rotation axis A ′ of the support member,
Corresponding to the variation in the yarn path, the second guide roll is tilted in the width direction of the yarn path by the rotation of the support member about the first and second rotation axes A ′ and B as the rotation center. At the same time, moving in the yarn path direction, the fiber bundle is automatically guided in the original yarn path direction.
A yarn path guide device characterized by that.   An angle θ1 formed between the rotation axis A of the support member and the yarn path entering the second guide roll is equal to an angle θ2 formed between the rotation axis A and the yarn path exiting from the second guide roll. The yarn path guide device according to claim 1 or 2.   The yarn path guide device according to any one of claims 1 to 3, wherein an inter-axis distance between a rotation axis of the second guide roll and a rotation axis A of the support member is 20 mm or more.   5. The yarn path guide device according to claim 1, wherein an angle θ <b> 3 formed by a rotation axis of the second guide roll and a yarn path is in a range of 45 ° to 135 °.   The yarn according to any one of claims 1 to 5, wherein a holding angle θ4 of the yarn path entering the second guide roll and the yarn path exiting from the second guide roll is 10 ° to 180 °. Road guide device.

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