JP4127909B2 - Method and apparatus for forming linear fiber bundle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and an apparatus for forming a fiber bundle in which a large number of fibers sent continuously are arranged in a straight line on a receiver. The fiber may be a monofilament or a multifilament.
[0002]
[Prior art]
A technique disclosed in Japanese Patent No. 2530519 is known as an apparatus for manufacturing a short fiber bundle formed by binding at least one end of a large number of hollow fibers. In this technique, the fiber layer receives the fiber from the upper fiber feeder at the same speed as the feeding speed of the fiber while reciprocating in the longitudinal direction of the lower bowl-shaped saucer, and the moving speed is Many fibers are arranged in parallel in the saucer by cutting the fibers at the same speed and feeding out, and the ends of the fibers arranged in the fiber layer are cut by a fiber cutting machine. A short fiber bundle is manufactured by bundling at least one end thereof with a bundling machine.
[0003]
In the above technique, the fiber layer is moved in the same direction at twice the speed of the three conveyors of the upper conveyor, the middle conveyor, and the lower conveyor, the first moving frame, and the first moving frame. The frame has two frames. Then, the fiber fed from the fiber feeder is received by the upper conveyor and transferred to the middle conveyor, and the driving pulley is driven to move the lower conveyor in the same direction at twice the speed of the middle conveyor. The drive roller is rotated to drive the middle conveyor and the lower conveyor, thereby receiving the fiber at the same speed as the feeding speed of the fiber from the upper conveyor and receiving the fiber at the same speed as the moving speed of the lower conveyor. The fibers are arranged in a straight line by hanging them down. Further, when the fiber feeding speed is Vf and the moving speed of the lower conveyor is Vt2, the moving speed of the lower conveyor is set so that Vf = Vt2.
[0004]
Of the three conveyors constituting the fiber layer, the movement width (stroke) of the lower conveyor is equal to the length of the target fiber. In other words, the lower conveyor stops momentarily when changing the direction of movement, but immediately rises to the set moving speed, and continues to move while hanging down the fiber, thereby making the moving width equal to the target fiber length. is doing.
[0005]
[Problems to be solved by the invention]
In the above technique, the fiber layer is composed of three conveyors and two moving frames that move in the same direction with a one-to-two speed relationship, and the two moving frames and the two conveyors are associated with each other. There is a problem that the construction of the system is complicated and the equipment cost becomes high.
[0006]
In particular, when a thick and highly rigid fiber is fed to the tray, the fiber fed to the tray is greatly curved every time the lower conveyor changes the moving direction (at each stroke end). Therefore, it is impossible to obtain a straight fiber having a desired length (lower conveyor stroke = desired straight line length + curved length), and the lower conveyor conveyor stroke is previously curved. It is necessary to keep a large amount in anticipation of what to do. That is, there is a problem that the apparatus, particularly the fiber layer, is enlarged.
[0007]
An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a method and an apparatus for forming a thick fiber bundle arranged in parallel in a straight line from a continuous fiber. It is said.
[0008]
[Means for Solving the Problems]
The method for forming a linear fiber bundle according to the present invention includes a linear fiber in which a large number of continuous fibers fed from a fiber feed source are arranged in a straight line in the longitudinal direction of a lower receiver via a fiber take-out / feeder. A method for forming a bundle, in which a fiber is stored or discharged according to a difference between a speed of a fiber fed from a fiber feed source and a speed of a fiber taken / drawn from a fiber take-out / feeding machine. When the moving distance of the fiber take-up / feeding machine that reciprocates in the longitudinal direction of the receiver is set to a value not more than the length of the target linear fiber bundle, and the fiber take-up / feeding machine reaches the movement limit , By stopping the movement of the fiber take-up / feeding machine and taking up / feeding the fiber, a loop is formed at the end of the fiber placed on the receiver, and then the fiber take-up / feeding machine is moved in the moving direction. Forming a straight fiber bundle of the desired length by moving in the opposite direction It is an feature.
[0009]
In the above-mentioned method for forming a linear fiber bundle, a fiber placed from a fiber feed source is picked up by a fiber take-out / feed-out machine that reciprocates in the longitudinal direction of the receiver and is fed out to the receiver. It can be arranged in a straight line on top. In particular, since the moving distance of the fiber take-out / feeder is set to be equal to or less than the length of the target linear fiber bundle, the apparatus can be miniaturized.
[0010]
Also, when the fiber take-up / feeding machine reaches the movement limit, it is stopped and in this state, the fiber is continuously taken up / drawn to form a loop at the end of the fiber placed on the receiver, and a predetermined amount After the fibers are taken out / drawn, the take-up / drawer is moved in the opposite direction, so that linear fibers can be arranged following the loop formed at the end.
[0011]
Therefore, even when the moving distance of the fiber take-up / drawing machine is equal to the length of the target linear fiber bundle, when the fiber take-up / feeding machine reaches the moving limit and stops, it is made to correspond to the rigidity of the fiber. Thus, by taking out and feeding out the fibers, a desired linear fiber bundle can be obtained without being affected by the curvature of the fibers at the movement limit. Therefore, the moving range of the fiber take-out / feeding machine may be equal to the length of the target linear fiber bundle, and downsizing of the entire apparatus can be realized.
[0012]
Moreover, the linear fiber bundle forming apparatus according to the present invention includes: A fiber delivery source; A fiber storage unit that temporarily stores continuous fibers delivered from a fiber delivery source, a fiber take-out / feeder that picks up the fibers and feeds them to a lower receiver, and the fiber take-out / feeder are preset. A reciprocating device that reciprocates with a distance and a speed, and a receiver that is arranged below the fiber take-out / delivery machine and places a large number of fibers in parallel, When the moving distance of the fiber take-up / drawing machine is set to a value equal to or less than the length of the target linear fiber bundle and the fiber take-up / feeding machine reaches the moving limit, the movement of the fiber take-up / feeding machine is stopped. In addition, the fiber is taken up and drawn out to form a loop at the end of the fiber placed on the receiver, and then the fiber take-up and feeding machine is moved in the direction opposite to the moving direction. The length of It is comprised so that a linear fiber bundle may be formed.
[0013]
In the above linear fiber bundle forming apparatus, the take-up / feeding speed and take-out / feeding length of the fiber take-out / feeding machine for picking up the fiber of the fiber take-out / feeding machine, and the reciprocating movement device for reciprocating the fiber take-out / feeding machine. The above method can be implemented by setting the moving speed and the moving distance (stroke) independently of each other.
[0014]
That is, the continuous fibers sent from the fiber delivery source at a predetermined speed are temporarily stored in the fiber storage section, and are placed on the lower receiver by the fiber take-out / feeder disposed downstream in the fiber delivery direction. It is drawn out. And while the fiber take-out / drawing machine picks up and draws out the fiber, it is driven in the horizontal direction by the reciprocating device to move the feeding position, thereby arranging the fibers taken up from the temporary storage section in the longitudinal direction of the receiver. I can do it. At this time, the stroke of the fiber take-up / feeding machine by the reciprocating device is set corresponding to the length of the target linear fiber bundle, and the fiber take-up / feeding speed and length by the fiber take-up / feeding machine are set. Thus, it is possible to form a loop by feeding the fiber at the moving limit.
[0015]
Therefore, the take-up / feeding speed, take-out / feeding length of the fiber take-out / feeding machine, the moving speed in the upstream / downstream direction, and the moving range are independently set appropriately according to the stiffness of the fiber. Thus, by forming loops having appropriate dimensions at both end portions, a target linear fiber bundle can be formed between these loops.
[0016]
In the linear fiber bundle forming apparatus, a creasing machine for folding the fibers is provided between the fiber take-up / feeding machine and the receiver and in the vicinity of at least one of the movement limits of the fiber take-up / feeding machine. Is preferred. By providing the crease machine in this way, it is possible to crease the loop formed by the movement limit of the fiber take-up / feeding device by the reciprocating device to reduce the bulk.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, while describing preferable embodiment of the formation method of the said linear fiber bundle using a figure, the structure of a formation apparatus is demonstrated. FIG. 1 is a diagram for explaining in principle a method for forming a linear fiber bundle according to the present invention, and FIG. 2 is a diagram for explaining the growth of a loop formed at an end when forming a target linear fiber bundle. 3 is a diagram for explaining the state of the loop formed at the end and the state in which the fiber is creased, FIG. 4 is a diagram for explaining the procedure for crease the fiber, and FIG. 5 is at the end of the linear fiber bundle. FIG. 6 is a schematic diagram illustrating the configuration of the forming apparatus according to the present embodiment, and FIG. 7 is a schematic diagram illustrating the configuration of the fiber take-out / feeding machine. FIG.
[0018]
In the method for forming a linear fiber bundle according to the present invention, the fiber f continuously fed from the fiber feed source is pulled by the fiber take-out / feeding machine A and is drawn downward and placed on the receiver. By reciprocating the fiber take-up / feeding machine A, a linear fiber bundle composed of a large number of linear fibers f is formed on the receiver.
[0019]
In particular, because the fiber f is curved at the moving direction change point (movement limit) of the fiber take-out / feeding machine A due to the rigidity of the fiber f, the fiber take-out / feeding is performed when the target linear length is set in advance. In setting the movement range of the machine A, the influence of the curved portion must be considered, in other words, in order to satisfy the target linear length, the dimension of the curved portion according to the rigidity of the fiber is considered, It is necessary to expand the moving range of the fiber take-out / feeding machine by an amount corresponding to this dimension, and this is an improvement in that the apparatus becomes larger.
[0020]
A method (formation method) for forming a linear fiber bundle will be described with reference to FIGS. As shown in FIG. 1, the forming method according to the present invention is a reciprocating device (C, FIG. 6) that draws out and feeds out the fiber f fed from the fiber feed source (1, FIG. 6) by the fiber take-out / feeder A. 6) and is moved in the longitudinal direction of a receiver (see FIG. 6) disposed below to form a fiber bundle having a preset linear length on the receiver. is there.
[0021]
In particular, when the fiber take-up / feeding machine A is reciprocated at a distance equal to or shorter than the preset length F of the fiber f, and the fiber take-up / feeding machine A reaches the movement limit, the position of the movement limit In the state where only the movement in the horizontal direction is stopped, the fiber f is picked up and drawn downward to form a loop 3 at the folded portion, regardless of the rigidity of the fiber f, regardless of the rigidity of the fiber f. It is possible to guarantee a straight line state.
[0022]
In order to form the loop 3 at the end of the straight fiber bundle, the procedure shown in FIG. 2 can be used. That is, as shown in FIG. 5A, when the fiber take-up / feeding machine A reaches the movement limit corresponding to the length F of the target fiber f, the fiber f is continuously taken up and fed out at this reaching position. In the state, only the horizontal movement of the fiber take-out / feeding machine A is stopped.
[0023]
For this reason, as shown to the same figure (b), the fiber f drawn | fed out from the fiber take-out / drawing machine A which stopped is drooping. At this time, the fiber f bends toward the end of the linear portion below due to its own rigidity, and the loop 3 is formed as shown in FIG. The length of the fiber f fed out in a state where the fiber take-up / feeding machine A stops only the horizontal movement (the length for forming the loop 3) is set in advance according to the rigidity of the fiber f, While the set length of the fiber f is being fed, the fiber take-up / feeding machine A is driven at a preset take-up / feeding speed.
[0024]
After forming the loop 3 at the end with the preset length of the fiber f, the fiber take-up / feeding machine A starts moving in the direction of the arrow b, for example, and a new fiber along the already placed fiber f Line up f.
[0025]
As described above, while forming the loop 3 at the end of the linear fiber f having a length F, a large number of fibers f are arranged on the receiver, and a linear fiber bundle that guarantees a straight line having the length F is obtained. It is possible to form.
[0026]
When a large number of fibers f having loops 3 formed at the ends are arranged, as shown in FIG. 3A, the loops 3 overlap with each other and become bulky and workability deteriorates, or the loops 3 interfere with each other. When the fibers f are intertwined, the fiber bundle is not linear, and may not be used as a product bundle. In this case, it is necessary to cut off the loop 3 portion of FIG. 3A in the downstream process. This is not desirable because it not only wastes resources but also requires additional equipment for cutting off, which increases equipment costs. For this reason, it is preferable to forcibly fold the fiber f by attaching a crease 3a to a predetermined portion of the loop 3, as shown in FIG. Thus, by folding the loop 3 with the crease 3a, not only can the bulk be reduced and the entanglement can be prevented, but the bundle length of the linear portion can be increased by converting the curved portion of the loop 3 into a straight line. Therefore, it is not necessary to cut off the non-linear portion and the intertwined portion, so that resources are not wasted and no equipment for cutting is required, so that the equipment cost can be reduced.
[0027]
In order to make a crease 3a at a predetermined part of the loop 3, for example, as shown in FIGS. 4 (a) to (c), the pair of crease members 5a and 5b are brought close to each other to sandwich the fiber f. It is possible to configure the fiber f to have a fold 3a.
[0028]
In particular, as shown in FIG. 5, a pair of creasing members 5a and 5b are arranged below the fiber take-up / feeding machine A and above the receiver, and the fiber take-out / feeding machine A feeds the fiber f. By controlling the crease members 5a and 5b to approach each other so as to make the crease 3a and continuously change the position in the vertical direction, the loop 3 with the crease 3a can be neatly overlapped. .
[0029]
That is, as shown in FIG. 5A, when the fiber take-up / feeding machine A reaches a preset movement limit in the direction of the arrow a and stops, the folding members 5a and 5b are moved toward each other. Start moving. In this state, the fiber f is bent starting from a point fa that changes from a straight line to a curve in accordance with the rigidity of the fiber f between the receiver and the fiber take-out / delivery machine A.
[0030]
The folding members 5a and 5b come close to each other and sandwich the fiber f as shown in FIG. 5B, thereby forming the fold 3a in the fiber f. In a state where the fiber f is sandwiched between the creasing members 5a and 5b, the fiber f is continuously fed out from the fiber take-out / feeding machine A in a stopped state. Then, the creasing members 5a and 5b are moved in the direction of the arrow c shown in the drawing (the extending direction of the fibers f arranged on the receiver) in synchronism with the take-up / feeding speed of the fiber f by the fiber take-out / feeding machine A. Thus, the bending starting from the point fa is released.
[0031]
Subsequently, the creasing members 5a, 5b move in the direction of the arrow c, and the creasing members 5a, 5b reach the vicinity of the upper surface of the receiver as shown in FIG. At this time, the curved portion formed between the fibers f (between the points fa to fb in FIG. 5A) is eliminated to form a straight portion of the fibers f.
[0032]
After the creasing members 5a and 5b reach the above position, the fiber take-up / feeding machine A starts moving in the direction of the arrow b, and at the same time, the creasing members 5a and 5b are separated from each other to release the fiber f. To return to the initial position. As the fiber take-up / feeding machine A moves in the direction of the arrow b, the fiber f hanging from the fiber take-up / feeding machine A as shown in FIG. Accordingly, the fiber f is placed on the receiver while maintaining a straight state with the crease 3a as an end.
[0033]
As described above, the fiber f drawn by the fiber take-up / feeding machine A and drawn downward can be placed on the receiver while making the crease 3a, and by repeating this operation. It is possible to order a large number of fibers f on the receiver. In this case, the end portion of the fiber f changes from a loop shape to a bent straight shape starting from the crease 3a, so that the alignment state becomes orderly and the size of the accurate straight line portion can be increased. That is, by adding the length R at both ends to the length F equal to the moving distance S of the fiber take-up / feeding machine A, it is possible to form a linear fiber bundle having a length L = F + 2R.
[0034]
Next, the configuration of a forming apparatus that realizes the above forming method will be described with reference to FIGS.
[0035]
In the figure, a forming apparatus includes a fiber delivery source 1 for delivering a fiber f, a fiber take-out / feeding machine A for taking out the fiber f and feeding it to a receiver 2, and a tension acting on the fiber f within a substantially constant range. The fiber storage unit B has a function of adjusting to the value of 1 and a function of storing the fiber, and a reciprocating device C that reciprocates the fiber take-up / feeding machine A.
[0036]
The fiber delivery source 1 sends out the fiber f at a constant speed (Vf), and is constituted by a fiber molding device or the like. The receiver 2 has a function of holding a large number of fibers f side by side, and is constituted by a bowl-shaped member disposed below the fiber take-out / feeder A. The fiber feeder 1 and the receiver 2 are known ones.
[0037]
The fiber take-out / delivery machine A is in the same direction as the delivery direction of the fiber f by the reciprocating device C and is the longitudinal direction of the receiver 2 arranged below, and is in the direction of arrow a (downstream direction) in FIG. It is driven and moved in the direction of arrow b (upstream direction) in FIG. 1 which is the opposite direction to the delivery direction of the fiber f. In this movement process, the fiber f is picked up without slipping and disposed below. To the receiver 2.
[0038]
In particular, the take-out / feed-out speed of the fiber f by the fiber take-out / feeder A and the take-out / drawing length or the take-out / feeding amount, which is the length of the fiber f taken out and taken out, are linear fibers formed by arranging the target fibers f side by side. It is set in accordance with conditions such as the length to guarantee the straight line of the bundle and the rigidity of the fiber f. Similarly, the moving distance and moving speed of the fiber take-up / feeding machine A by the reciprocating moving device C are also set corresponding to the length of the target linear fiber bundle and the rigidity of the fiber f.
[0039]
That is, the curvature formed when the fiber f fed from the fiber take-up / feeding machine A is placed on the receiver 2 is changed depending on the rigidity of the fiber f. Since the curvature of the fiber f affects the length of the straight fiber bundle, the take-up / feeding speed and take-up / feeding length by the fiber take-out / feeding machine A, and the movement of the fiber take-up / feeding machine A by the reciprocating movement device C. The distance and the moving speed are set to independent optimum values.
[0040]
The fiber take-out / feeding machine A is configured so as to generate a suitable contact friction with the fiber f so as not to slip. That is, the fiber take-out / delivery machine A only needs to be configured so that no force is applied to the fiber f, and does not limit the structure, and is shown in FIGS. 7 (a) to 7 (d). Such a structure can be selectively used.
[0041]
For example, FIG. 4A shows a fiber take-out / feeding machine A constituted by one roller whose surface is appropriately roughened so that the coefficient of friction with the fiber f becomes an appropriate value. FIG. 2B shows a configuration using a multi-stage roller in order to more reliably take up the fiber f. Further, FIG. 3C shows a configuration in which the fiber f is taken up by a belt in which a large number of grooves are formed on the surface so that appropriate friction can be exerted between the grooves.
[0042]
FIG. 6D shows a mechanism applied to the fiber take-out / feeding machine A of the present embodiment. The surface is drawn by sandwiching the fiber f by using two rollers 4a and 4b formed of an elastic material such as rubber. It is configured. One of the rollers 4a and 4b is configured as a drive roller, and can take out and feed out the fiber f.
[0043]
Each of the above structures has a member consisting of a roller or a belt to take out and feed out the fiber f, and the contact friction generated between these members and the fiber f is set to an appropriate value for delivery. It is comprised so that generation | occurrence | production of a slip can be prevented between the fibers f made. Therefore, the fiber take-out / feeder A does not apply tension to the fiber f.
[0044]
The fiber storage unit B temporarily stores when the fiber f sent from the fiber delivery source 1 at a constant speed Vf increases or decreases according to a speed difference associated with a change in the moving direction of the fiber take-out / feeder A. It has a function. This fiber storage part B is comprised by a pair of roller 6a arrange | positioned along the transfer path | route of the fiber f, and the tension | tensile_strength provision roller 6b for providing a fixed tension | tensile_strength to the fiber f. And when the fiber f sent continuously from the fiber sending source 1 at a constant speed is simply stored, the fiber f may be simply suspended without giving any special tension to the fiber f. In addition, when a force for sending the fiber f from the fiber sending source 1 cannot be expected, a pair of driving rollers may be arranged on the inlet side, and the fiber f may be sandwiched and pulled by the driving roller.
[0045]
The reciprocating device C is a mechanism for reciprocating the fiber take-up / feeding machine A in the directions of arrows a and b. The fiber f is fed out and arranged on the receiver 2 along with the reciprocating movement. . For this reason, the reciprocating device C is configured as a linear motion table configured by using a mechanism such as a ball screw or a rack and pinion. In particular, when the fiber take-up / feeding machine A is reciprocated, the fiber take-up / feeding machine A and the reciprocating movement device C are extremely lightweight in order to shorten the time required for deceleration-stop-acceleration when changing the moving direction. ing.
[0046]
Next, a method of arranging the fibers f on the receiver 2 by the forming apparatus configured as described above will be described with reference to FIG. First, the case where the fiber take-out / feeding machine A moves in the direction (arrow b direction) toward the fiber reservoir B (outward path) will be described with reference to FIG.
[0047]
As shown in the figure, as an initial state, a fiber having a length L ′ longer than the moving distance S of the fiber take-out / feeding machine A exists in advance between the take-out / feeding machine A and the fiber storage unit B. Yes. At this time, the storage amount of the fiber f stored in the fiber storage part B is substantially zero.
[0048]
From the initial state as described above, the fiber take-out / feeding machine A starts to move in the direction of the arrow b at the moving speed Vt1, and at the same speed Vr1 as the moving speed Vt1, between the fiber take-up / feeding machine A and the fiber storage unit B. While picking up the fiber f present in the container, the picked-up fiber f is fed out to the receiver 2 below. At this time, the fiber f existing between the fiber take-out / feeding machine A and the fiber storage part B is stationary when viewed from the outside. Therefore, when the fiber take-up / feeding machine A moves in the direction of the arrow b, the traveling speed Vf1 of the fiber f is zero,
Vf1 = 0 (1)
Vt1 = Vr1 (2)
Thus, when the fiber f existing between the fiber take-out / feeding machine A and the fiber storage part B is fed out to the lower receiver 2, tension is not applied to the fiber f or slackened.
[0049]
As described above, when the fiber take-up / feeding machine A is moving in the direction of the arrow b, the speed Vf1 at which the fiber f is drawn from the fiber storage section B is zero, while the fiber f from the fiber feed source 1 is at the speed Vf. Is sent continuously.
[0050]
Then, when the fiber take-out / feeding machine A moves by a preset distance S in the direction of arrow b, only the horizontal operation is stopped. At this time, the fibers f having the same length F as the movement distance S are arranged on the receiver 2. Further, only the take-up / feeding operation is continued at the same take-up / feeding speed, and the fiber f is fed out by the length 2R of the loop part to form the loop 3 at the end as shown in FIG. As shown in FIG. 5, it is placed on the receiver 2 with a crease 3a. When the predetermined loop 3 or fold 3a is formed, the fibers f having the length F + 2R are arranged on the lower receiver 2, and at this time, the movement in the arrow a direction which is the opposite direction is started. To do.
[0051]
The time T1 taken for the fiber take-out / feeding machine A to move the distance L in the direction of arrow b is:
T1 = S / Vt1 (3)
It is. During this time T1, the fiber reservoir B is fed with the fiber f delivered from the fiber delivery source 1 at a speed Vf.
Lb1 = Vf · T1 (4)
It will be stored only for the length of. Further, the time T1 ′ required for the fiber take-up / feeding machine A to stop the horizontal operation and continue the take-up / feeding operation at the same take-up / feeding speed and form the loop 3 or the fold 3a is:
T1 '= 2R / Vr1 (5)
It is. During this time T1 ', the fiber reservoir B receives the fiber f delivered from the fiber delivery source 1 at the speed Vf.
Lb1 ′ = (Vr1−Vf) / T1 ′ (6)
It will be stored only the length of. Here, if Vr1> Vf, the stored amount is reduced by Lb1 ', so the stored amount in the forward path is (Lb1-Lb1'). Further, if Vr1 <Vf, the amount of storage increases by Lb1 ', so the amount of storage in the forward path is (Lb1 + Lb1').
[0052]
Next, the case where the fiber take-out / feeding machine A moves in the direction of arrow a (return path) will be described with reference to FIG.
[0053]
While the fiber take-out / feeding machine A moves in the direction of arrow a at the moving speed Vt2, the fiber f existing between the fiber take-out / feeding machine A and the fiber storage part B at the same speed Vr2 as the moving speed Vt2, And the fiber f temporarily stored by the fiber storage part B is taken out to the receiver 2 below, taking over.
[0054]
The speed at which the fiber f is taken out from the fiber reservoir B, that is, the traveling speed Vf2 of the fiber f existing between the fiber take-out / feeder A and the fiber reservoir B is the speed at which the fiber take-out / feeder A takes the fiber f. This is the sum of Vr2 and moving speed Vt2 at which the fiber take-out / feeder A moves. That is, when viewed from the outside, the fiber f is
Vr2 + Vt2 = Vf2 (7)
It is pulled out from the fiber storage part B at a speed of.
[0055]
By the way, when the fiber take-out / feeder A starts to move in the direction of the arrow a, at least a fiber f having a length (Lb1−Lb1 ′) or a length (Lb1 + Lb1 ′) is stored in the fiber storage unit B. . Here, if the speed Vf2 for picking up the fibers f from the fiber storage section B is not greater than the speed Vf at which the fibers f are sent from the fiber delivery source 1, the fiber storage section B will increase the storage of the fibers f. Therefore, between Vf2 and Vf,
Vf2> Vf (8)
This condition is necessary.
[0056]
Further, when feeding the fiber to the lower receiver 2, the fiber is not excessively tensioned, and in order to prevent the fiber from loosening, as in the above formula (2),
Vt2 = Vr2 (9)
Must.
[0057]
When the fiber take-out / delivery machine A is moving in the direction of arrow a, the speed at which the fiber f is drawn from the fiber storage section B is Vf2, while the delivery speed from the fiber delivery source 1 is Vf. The tension applying roll 6b of the part B moves at a speed of (Vf2−Vf) / 2 in a direction (upward direction) to reduce the amount of storage.
[0058]
The fiber take-out / feeding machine A stops only the horizontal operation when it has moved by a preset distance S in the direction of arrow a. At this time, on the receiver 2, fibers f having the same length F as the movement distance S are arranged in addition to the loop 3 formed in the aforementioned forward path. Further, only the take-up / feeding operation is continued at the same take-up / feeding speed, and the fiber f is fed out by the length 2R of the loop portion, and the loop 3 or the fold 3a is formed at the end portion in the same manner as described above. The fibers f of length F + 2R are arranged on the vessel 2.
[0059]
The time T2 required for the fiber take-up / feeding machine A to move by the distance S in the direction of arrow a is:
T2 = S / Vt2 (10)
It is. Considering the length of the fiber f entering and exiting the fiber reservoir B during this time T2, new fibers f are continuously delivered from the fiber delivery source 1 at the speed Vf, while the fiber reservoir B The fiber f is picked up at a speed Vf2 by the fiber take-out / feeding machine A. And since Vf2> Vf according to the equation (8), the length of the fiber taken from the fiber reservoir B during time T2 is
Lb2 = (Vf2−Vf) · T2 (11)
It becomes. Further, the time T2 ′ required for the fiber take-up / feeding machine A to stop the horizontal operation and continue the take-up / feeding operation at the same take-up / feeding speed and form the loop 3 or the fold 3a is:
T2 '= 2R / Vr2 (12)
It is. During this time T2 ', the fiber reservoir B receives the fiber f delivered from the fiber delivery source 1 at the speed Vf.
Lb2 '= (Vr2-Vf) / T2' (13)
It will be stored only for the length of. Here, if Vr2> Vf, the storage amount is reduced by L2 ′, and therefore the take-up length from the fiber storage portion B in the return path is (Lb2 + Lb2 ′). Further, if Vr2 <Vf, the amount of storage increases by Lb2 ′, so the take-up length from the fiber storage portion B in the return path is (Lb2-Lb2 ′).
[0060]
The length (Lb2 + Lb2 ′) or length (Lb2−Lb2 ′) of the fiber f taken from the fiber reservoir B by moving the fiber take-up / feeding machine A in the direction of arrow a, If the length (Lb1−Lb1 ′) or the length (Lb1 + Lb1 ′) of the fiber f that moves in the direction and is stored in the fiber storage part B is not equal, the fiber f accumulates too much in the fiber storage part B, or the fiber f Therefore, the condition of the following formula is necessary because excessive tension is applied to the fiber f.
[0061]
When Vr1> Vf, Vr2> Vf,
(Lb1−Lb1 ′) = (Lb2 + Lb2 ′) (14)
When Vr1> Vf, Vr2 <Vf,
(Lb1-Lb1 ') = (Lb2-Lb2') (15)
When Vr1 <Vf, Vr2> Vf,
(Lb1 + Lb1 ′) = (Lb2 + Lb2 ′) (16)
When Vr1 <Vf, Vr2 <Vf,
(Lb1 + Lb1 ′) = (Lb2−Lb2 ′) (17)
In addition, when Vr1 = Vf, there is no storage increase or decrease in the fiber storage portion B when forming a loop at the end of the forward path,
Lb1 ′ = 0 (18)
Similarly, at the end of the return path, when Vr2 = Vf,
Lb2 ′ = 0 (19)
It becomes.
[0062]
In order to obtain the actual operation speed, the fiber feed speed Vf from the fiber feed source 1 and the length L = F + 2R of the fiber bundle to be formed on the receiver 2 are known, and the above (1 The combination of Vt1 = Vr1 and Vt2 = Vr2 that satisfy the formulas (19) to (19) may be selected. For example, the moving speed Vt1 and the drawing / feeding speed Vr1 of the fiber take-up / feeding machine A in the direction of the arrow b are
Vt1 = Vr1 = Vf (20)
From (3) to (19),
Vt2 = Vr2 = Vf (21)
Is required.
[0063]
By repeating the movement of the fiber take-out / feeding machine A in the directions of the arrows a and b as described above, the loop 3 is formed every time the movement limit is reached, or the crease 3a is attached, thereby receiving the receiver 2 Above, a straight fiber bundle with a straight part length F and a loop 3 length 2R at both ends, or a straight fiber bundle with a length F + 2R between the folds 3a at both ends. Is formed.
[0064]
【The invention's effect】
The present invention exhibits the following effects.
[0065]
It is possible to form a thicker bundle of fibers arranged in parallel in a straight line from fibers delivered at a constant speed from a fiber delivery source with a simple and inexpensive apparatus configuration without wasting resources.
[0066]
The mechanism is simple and can be mechanized at a low equipment cost, compared to the conventional case where fibers are stacked while being arranged in a lower receiver using a long fiber layer constituted by a conveyor mechanism that expands and contracts.
[0067]
In addition, when the fiber take-up / feeding machine reaches the movement limit, a loop is forcibly formed by drawing out the fiber in a state where the fiber take-up / feeding machine is stopped, so that the device can be operated regardless of the rigidity of the fiber. Without increasing the size, the linear fiber bundle can be formed by setting the moving distance of the fiber take-out / feeding machine to be equal to or smaller than the length of the target linear fiber bundle.
[0068]
Further, by forming a crease at a predetermined part of the loop, the fibers placed on the receiver can be prevented from becoming bulky on the end side and can be arranged neatly.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining in principle a method of forming a linear fiber bundle according to the present invention.
FIG. 2 is a diagram for explaining the growth of a loop formed at an end portion when a desired linear fiber bundle is formed.
FIG. 3 is a diagram illustrating a state of a loop formed at an end portion and a state in which a fiber is creased.
FIG. 4 is a diagram illustrating a procedure for making a crease in a fiber.
FIG. 5 is a view for explaining the movement when a crease is made at the end of a linear fiber bundle and the linear fiber bundle is placed on a receiver.
FIG. 6 is a schematic diagram illustrating a configuration of a forming apparatus according to the present example.
FIG. 7 is a diagram illustrating the configuration of a fiber take-out / feeding machine.
[Explanation of symbols]
A Fiber take-up and feeding machine
B Fiber storage part
C reciprocating device
1 Fiber delivery source
2 Receiver
3 loops
3a crease
4a, 4b Roller
5a, 5b Crease member
6a roller

Claims (3)

  A method of forming a linear fiber bundle in which a number of continuous fibers fed from a fiber feed source are arranged in a straight line in the longitudinal direction of a lower receiver through a fiber take-out / feeder, and sent from the fiber feed source The reciprocating movement in the longitudinal direction of the receiver above the receiver while storing or discharging the fibers according to the difference between the speed of the fibers to be picked up and the speed of the fibers picked up / drawn from the fiber take-out / drawer Set the travel distance of the fiber take-up / drawing machine to a value less than the length of the desired linear fiber bundle, and when the fiber take-up / feeding machine reaches the movement limit, stop the movement of the fiber take-up / feeding machine. A loop is formed at the end of the fiber placed on the receiver by picking up and drawing out the fiber, and then the straight line of the desired length is moved by moving the fiber take-up and drawing machine in the direction opposite to the moving direction. A method for forming a linear fiber bundle, comprising forming a fiber bundle. A fiber delivery source, a fiber storage unit that temporarily stores continuous fibers delivered from the fiber delivery source, a fiber take-out / feed-out machine that picks up the fiber and feeds it to a lower receiver, and the fiber take-out / feed-out machine the has a reciprocating device for reciprocating with a preset distance and speed, and a receiver for placing the fiber take-off, the fibers being disposed below the feeding machine multiplicity of parallel to the fiber take-off When the moving distance of the feeding machine is set to a value equal to or less than the length of the target linear fiber bundle and the fiber take-up / feeding machine reaches the movement limit, the movement of the fiber take-up / feeding machine is stopped and the fiber Is formed so that the fiber take-up / feeding machine moves in the direction opposite to the moving direction after a loop is formed at the end of the fiber placed on the receiver by being taken up / drawn out. linear fiber bundles and forming a linear fiber bundle Forming apparatus.   The creasing machine for folding the fiber is provided between the fiber take-out / feeding machine and the receiver and in the vicinity of at least one of the movement limits of the fiber take-out / feeding machine. A device for forming linear fiber bundles.

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