JP2017114713A - Production method of strand and strand production apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production method and a production apparatus of a strand capable of facilitating a guide work of a glass filament to a convergence unit, and improving work efficiency.SOLUTION: In a guide step for guiding a plurality of glass filaments Gf, Gf... to a convergence roller (convergence member) 31 of a convergence unit 30 by an operator M at a starting time of strand formation, the plurality of glass filaments Gf, Gf... are guided by the operator M to the convergence roller 31 of the convergence unit 30 arranged on a nearer position to the operator M than a position at a strand formation time.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for manufacturing a strand made of, for example, glass filaments and a technique for a manufacturing apparatus, and more particularly, to a technique for manufacturing a strand and a technique for a manufacturing apparatus for improving the efficiency of guiding a glass filament to a focusing device. .

Conventionally, in a spinning process of strands made of glass filaments, it is common to form a strand wound (cake) by bundling a plurality of glass filaments to form a strand and winding the strand on a bobbin. (See, for example, “Patent Document 1”).
Specifically, for example, molten glass is drawn out from the bushing to form a plurality (for example, thousands) of glass filaments, and each of the formed glass filaments is brought into contact with a rotating roller of a sizing agent coating apparatus. Then, a sizing agent (binder) is applied, and a plurality of glass filaments coated with the sizing agent are focused on a strand by a focusing device equipped with a focusing roller, and the traversed mechanism (traverse mechanism) The strand is manufactured by winding on a bobbin that rotates at a high speed provided in the winding device.

JP-A-8-301519

Here, in the spinning process, for example, a working position for maintaining (or operating) the bushing, the sizing agent coating apparatus, and the converging apparatus, and a working position for maintaining or operating the traverse mechanism, the winding apparatus, and the like. Are often spaced apart in the vertical direction.
In addition, the rotating roller is installed almost directly below the bushing, and the focusing roller is disposed at a fixed position below the rotating roller in order to ensure that the glass filament is brought into contact with the rotating roller.

  And at the start of the spinning process, or at the time of resuming the spinning process by cutting the glass filament, each time, the operator needs to perform a guide operation to bundle a plurality of glass filaments and guide them to the focusing roller. Since the focusing roller is away from the work position of the worker, it is necessary to take a posture that makes it difficult for the worker to work, and workability is poor.

  The present invention has been made in view of the present problems described above, and a strand manufacturing method and a manufacturing method capable of facilitating a guide operation of a glass filament to a focusing device and improving work efficiency. It is an object to provide an apparatus.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, the manufacturing method of the strand according to the present invention includes a forming step of forming a plurality of glass filaments by drawing the molten glass downward from a plurality of holes provided in the bushing, and the sizing agent coating apparatus. A sizing agent application step of applying a sizing agent to the surface of a plurality of glass filaments, and a strand forming step of forming a strand by focusing the plurality of glass filaments coated with the sizing agent by a sizing device having a sizing member. The strand forming step includes a guide step in which an operator guides the plurality of glass filaments to the converging member of the converging device at the start of the strand formation, and the converging at the strand formation after the strand formation is started. The plurality of glass filaments are focused by a focusing member of the apparatus, and the strike A strand manufacturing method including a glass filament converging step for forming a wire, wherein in the guiding step, the operator places the concentrating device at a position closer to the operator than the position at the time of forming the strand. The plurality of glass filaments are guided to a focusing member.

  According to the present invention having such a configuration, when performing an operation (guidance process) of bundling a plurality of glass filaments and guiding them to the focusing member of the focusing device, the plurality of glass filaments can be easily operated. Therefore, the working efficiency can be improved.

  Further, in the strand manufacturing method according to the present invention, in the guiding step, the operator places the plurality of glass filaments on the converging member of the converging device that is disposed on a substantially perpendicular line of the converging agent application device. It is preferable to guide.

  According to the strand manufacturing method having such a configuration, a plurality of glass filaments can be guided to the converging member in a posture in which an operator can work more easily. In addition, since the position of the plurality of glass filaments hanging from the sizing agent coating apparatus and the position of the focusing member of the focusing apparatus are very close to each other, the plurality of glass filaments can be guided to the focusing member without difficulty.

  The strand manufacturing apparatus according to the present invention is in contact with a bushing having a plurality of holes from which molten glass can be drawn, and a plurality of glass filaments formed from the molten glass drawn from the holes, A strand comprising: a sizing agent application device that slides and applies a sizing agent; and a sizing device having a sizing member that guides and focuses the plurality of glass filaments coated with the sizing agent to form a glass strand. In the manufacturing apparatus, the converging member is configured to be movable in a horizontal direction.

  According to the present invention having such a configuration, since the converging member can be disposed at a position (guide position) closer to the operator than the position at the time of strand formation (converging position), the posture in which the operator can easily work is obtained. Thus, it becomes easy to guide a plurality of glass filaments to the converging member, and the working efficiency can be improved.

As effects of the present invention, the following effects can be obtained.
That is, according to the strand manufacturing method and the strand manufacturing apparatus according to the present invention, the guide operation of the glass filament to the converging member of the converging device can be facilitated, and the working efficiency can be improved.

The schematic side view which showed the whole structure of the strand manufacturing apparatus in one Embodiment of this invention. The front view which showed the structure of the focusing apparatus. The side view which similarly showed the structure of the focusing apparatus. The top view which similarly showed the structure of the focusing apparatus. The top view which showed the structure of the focusing apparatus in another embodiment.

Next, embodiments of the invention will be described.
In the following description, for convenience, the vertical direction and the front-rear direction of the strand manufacturing apparatus 1 will be defined by the directions of the arrows shown in FIG.
Further, the vertical direction, the front-rear direction, and the left-right direction of the focusing device 30 will be defined and described by the directions of the arrows shown in FIGS.
Moreover, the front-rear direction and the left-right direction of the focusing device 30 according to another embodiment will be defined and described by the directions of the arrows shown in FIG.
Further, in FIGS. 1 to 3, the direction of the arrow A is defined as the drawing direction of the glass filament Gf or the strand Gs.

[Strand manufacturing apparatus 1]
First, the whole structure of the strand manufacturing apparatus 1 which concerns on this invention is demonstrated using FIG.
The strand manufacturing apparatus 1 in the present embodiment spins molten glass to form a plurality of glass filaments Gf, Gf... And one or a plurality of these glass filaments Gf, Gf. This is an apparatus for winding strands Gs and Gs (for example, two in the present embodiment) around bobbins 44 and 44 to form strand wound bodies Sk and Sk.

The strand manufacturing apparatus 1 is mainly composed of a bushing 10, a sizing agent coating apparatus 20, a sizing apparatus 30, a winding apparatus 40, and the like.
The bushing 10 is a member for drawing the molten glass flowing into the inside into a fiber shape and forming a glass filament Gf.
The bushing 10 is formed of, for example, platinum or a platinum alloy, and a plurality of (for example, several thousand) hollow nozzles (not shown) arranged in a matrix of a plurality of rows and a plurality of columns at the bottom thereof. Is provided.

  A plurality of glass filaments Gf, Gf... Are formed (spun) by drawing the molten glass in the bushing 10 in the direction of arrow A from the hollow portion (hole) of these hollow nozzles.

Next, the sizing agent coating apparatus 20 will be described.
The sizing agent coating device 20 focuses each glass filament Gf, Gf... Spun by the bushing 10 into two strands Gs and Gs (only one is shown because it is a side view in FIG. 1). It is an apparatus for applying a sizing agent for the purpose.
Further, the sizing agent coating apparatus 20 includes a container 21 for storing the sizing agent, and the sizing agent in the container 21 at a part of the outer peripheral surface (for example, the lower end in the present embodiment) with the axial direction being the horizontal direction. It is comprised by the rotating roller 22 etc. which are axially supported so that it may contact.

  Then, in the other part of the outer peripheral surface of the rotating roller 22 (for example, the front end part in the present embodiment), a plurality of glass filaments Gf, Gf,... A sizing agent is applied to the outer peripheral surface of each glass filament Gf.

Next, the focusing device 30 will be described.
The bundling device 30 bundles a plurality of glass filaments Gf, Gf... To which the bundling agent has been applied by the bundling agent application device 20 to form a plurality of (two) strands Gs.Gs. This is a device for applying a tension (tension) to the glass filament Gf (or the strand Gs) between the winding devices 40 to be described later so that the glass filament Gf is easily brought into contact with the rotating roller 22.

  Although the details will be described later, a plurality of focusing devices 30 (two in this embodiment) are supported on the same axis while the axial direction is the horizontal direction (for example, the left-right direction in the present embodiment). 1 is a side view and only one piece is shown), and these focusing rollers 31 and 31 are a plurality of glass filaments Gf, Gf, drawn from the bushing 10. ... Are pressed to apply tension, and are bundled while being guided, such as “focusing position (for example, a position indicated by“ focusing roller 31A ”in FIG. 1)” and “focusing position” in FIG. It is arranged so as to be movable in the horizontal direction between the “guide position (for example, the position indicated by“ focusing roller 31B ”in FIG. 1)” close to the work position for performing the guide work shown.

  Then, the plurality of glass filaments Gf, Gf,... That have passed through the sizing agent coating device 20 are brought into contact with the outer peripheral surface of each focusing roller 31 and are slid to be focused, so that one strand Gs. Bundled together.

  Thus, in the present embodiment, a plurality of (two) focusing rollers 31 and 31 are provided, so that a plurality of (two) strands Gs and Gs can be formed by a single spinning process. .

Next, the winding device 40 will be described.
The winding device 40 is a device for winding the strand Gs focused by the focusing device 30 to form the strand wound body Sk.

  The winding device 40 includes a plate-like main body 41, and is supported on one side surface (for example, the left side surface in the present embodiment) of the main body 41 by a turret board 42 and a turret board 42 that are configured to be rotatable. A pair of spindles 43 and 43 arranged so as to extend in parallel and in the horizontal direction, and a first drive motor (not shown) attached to the turret board 42 and rotating each spindle 43 are arranged. The

  In addition, on each spindle 43, two bobbins 44 and 44 are coaxially arranged in accordance with the number of focusing rollers 31 and 31 of the focusing device 30 (in FIG. 1, only one is shown because it is a side view). The main body 41 is provided with a second drive motor (not shown), and all the bobbins 44 and 44 in one spindle 43 are brought into a “full winding state” by the second drive motor. Then, in order to switch to the other spindle 43, the turret board 42 is driven to rotate 180 °.

In the main body 41, a traverse mechanism 45 is disposed in front of the bobbin 44 at the "execution position" of the winding operation of the strand Gs. The strand Gs wound around the bobbin 44 by the traverse mechanism 45 is The traverse is made in a direction parallel to the axial direction of the spindle 43.
In this way, while traversing by the traverse mechanism 45, the strand Gs is wound around each bobbin 44 to form the strand wound body Sk.

  The strand manufacturing apparatus 1 having the above-described configuration is installed across the floor and the floor of a building such as a factory, for example, and the bushing 10, the sizing agent coating device 20, and the sizing device 30 are provided on the floor, The winding device 40 is disposed on the lower floor F1 and below the sizing agent coating device 20.

  An opening H is formed in a region located directly below the sizing agent coating device 20 on the floor F2, and the strand Gs bundled by the sizing roller 31 of the sizing device 30 passes through the opening H. It is led to the winding device 40 downstairs.

  Here, at the time of strand formation in which the glass filaments Gf, Gf,... Are spun by the bushing 10 and the spun glass filaments Gf, Gf,. In order to apply a predetermined tension to the strand Gs, in the vicinity of the opening H, a horizontal direction with respect to a perpendicular C (hereinafter simply referred to as a perpendicular C) from a portion where the rotating roller 22 and the glass filament Gf are in contact with each other (In this embodiment, it is arranged at a position separated rearward, that is, a “focusing position”).

  Conventionally, the position of the converging roller 31 is fixed, and at the start of strand formation, specifically at the start of the spinning process, or at the start of the spinning process due to unexpected cutting of the glass filament Gf, Each time, the worker M needs to perform a guiding operation by bundling a plurality of glass filaments Gf, Gf,... At the convergence position at the peripheral edge of the opening H on the building floor. Therefore, the worker M has to perform the guide work in a forward tilted posture, and the workability is poor, and a countermeasure for improving the work efficiency of the guide work has been desired.

  On the other hand, in the present embodiment, at the start of strand formation, the worker M is arranged at a position (guide position) closer to the worker M than the position (converging position) at the time of strand formation. In order to guide a plurality of glass filaments Gf, Gf, etc., it is not necessary to perform a guiding operation by bundling a plurality of glass filaments Gf, Gf,. The work can be performed with a reasonable posture, and the work efficiency can be improved.

  In the present embodiment, the “guide position” is a position close to the perpendicular C with respect to the “focus position”. For example, even if the “focus position” is a position far from the operator M, The worker M can easily perform the guidance work at a “guide position” that is close to the perpendicular C to the “focusing position” and close to the worker M.

[Focusing device 30]
Next, the configuration of the focusing device 30 will be described in detail with reference to FIGS.
As shown in FIG. 2, the focusing device 30 is mainly composed of a focusing roller 31, a driving unit 32, a movable unit 33, a guide member 34, and the like. For example, the focusing device 30 is firmly formed by a frame 50 constructed by a plurality of rod-like members. Retained.

The focusing roller 31 is a member provided as an example of a focusing member that bundles and converges a plurality of glass filaments Gf, Gf.
As described above, the focusing roller 31 is arranged with the axial direction as the left-right direction, and a groove portion 31a having a “V” shape in cross section is formed over the entire circumference at the central portion of the outer peripheral surface in the axial direction. Yes.

  Then, the plurality of glass filaments Gf, Gf,... Sliding on the outer peripheral surface of the focusing roller 31 are guided to the bottom of the groove 31a along the inclined surface of the groove 31a, and a single strand Gs. Focused on.

Next, the driving means 32 will be described.
The driving means 32 is for rotating the focusing roller 31.
The drive means 32 extends in a horizontal direction (for example, in the left-right direction in the present embodiment) and coaxially from the housing 32A in which a drive motor as a drive source, a speed reduction mechanism, and the like are housed, and from the left and right side surfaces of the housing 32A. The two output shafts 32B and 32B are configured.
In addition, converging rollers 31 and 31 are fitted on the two output shafts 32B and 32B, respectively, on the same axis.

Then, the driving means 32 drives the focusing roller 31 to rotate at a predetermined rotational direction (direction rotating in the moving direction of the strand Gs) and at a rotational speed via the output shaft 32B.
Thereby, it is possible to prevent a plurality of glass filaments Gf, Gf,... (Or strands Gs) from coming into contact with each other at the groove 31a of the focusing roller 31 at all times, thereby extending the life of the focusing roller. Can be planned.

Next, the movable means 33 will be described.
The movable means 33 is for moving the focusing roller 31 together with the driving means 32 in the horizontal direction between the above-described “guide position” and “focusing position”.
As shown in FIG. 3, the movable means 33 includes an actuator 33 </ b> A made of, for example, an air cylinder, and a support member 33 </ b> B that supports the actuator 33 </ b> A from the frame 50.

  The movable means 33 is arranged such that the movable direction of the telescopic rod 33A1 of the actuator 33A is the front-rear direction, and at the front end of the telescopic rod 33A1, the housing 32A of the driving means 32 is connected via the bracket 33C. Connected.

In the movable means 33 having such a configuration, when the telescopic rod 33A1 is horizontally moved forward, the two focusing rollers 31 and 31 in the drive means 32 are both horizontally moved forward.
Then, when the position of the telescopic rod 33A1 reaches the limit position (that is, the foremost end position), the focusing roller 31 is positioned at the “guide position”.

On the other hand, when the telescopic rod 33A1 is horizontally moved backward from the limit position, the two focusing rollers 31 and 31 in the driving means 32 are both horizontally moved backward.
Then, when the position of the telescopic rod 33A1 reaches the return position (that is, the end position), the focusing roller 31 is positioned at the “focusing position”.

Next, the guide member 34 will be described.
The guide member 34 is a member for guiding the plurality of glass filaments Gf, Gf,... That have passed through the sizing agent coating apparatus 20 to the groove portion 31 a of the focusing roller 31.
As shown in FIG. 4, the guide member 34 is configured by, for example, a round bar member that is bent in a substantially “V” shape in plan view, and a rear end portion of the focusing roller 31 above each focusing roller 31. It arrange | positions so that it may expand gradually toward back more.
In other words, at the “guide position”, the focusing roller 31 is provided with a guide member 34 that expands toward the “focusing position” side.

The guide member 34 is fixed to the housing 32A of the driving means 32 through the bracket 34A at the front end thereof.
Thereby, the relative positional relationship of the guide member 34 with respect to the focusing roller 31 is always maintained, and when the focusing roller 31 is moved by the movable means 33, the guide member 34 moves following the focusing roller 31. To do.

By providing the guide member 34 having such a configuration, for example, the glass filaments Gf and Gf are arranged at a position along the movement path of the guide member 34, for example, on the inner side of the guide member 34 (inner side in a substantially “V” shape in plan view). .., And by moving the focusing roller 31 located at the “guide position” toward the “focusing position”, a plurality of glass filaments Gf, Gf,. Are gradually converged while being slid toward the outer periphery, and are easily guided to the outer peripheral surface of the condensing roller 31 (more specifically, the groove 31a).
In other words, the focusing roller 31 can be brought close to the work position to facilitate the work of the worker M, and the guide work can be further simplified.

Further, the guide member 34 is configured so that the glass filament Gf does not come into contact with it at the “focusing position”.
Therefore, it is possible to prolong the life of the guide member 34 and to suppress the cutting of the glass filament Gf when forming the glass strand.

[Operation procedure]
Next, the operation | movement procedure of the strand manufacturing apparatus 1 in this embodiment is demonstrated using FIG.

First, in the focusing device 30, the two focusing rollers 31 and 31 are both in a state where the rotational driving is stopped at the “guide position”.
In the winding device 40, the spindle 43 and the traverse mechanism 45 are in a stopped state, and the two bobbins 44 and 44 on which the strand Gs is not yet wound on the spindle 43 located in the vicinity of the traverse mechanism 45. Are inserted on the same axis.

  In such a state, molten glass melted in a melting furnace (not shown) is caused to flow into the bushing 10, and a plurality of fibrous glass is provided from a plurality of hollow nozzles provided at the bottom of the bushing 10. Pull out the filaments Gf, Gf.

  The plurality of glass filaments Gf, Gf,... Drawn from the bushing 10 are suspended down through the opening H of the floor F2 on the floor first, and after passing through the traverse mechanism 45, one bobbin At the predetermined position (one end portion) 44, the respective leading end portions are wound together.

  Thereafter, the glass filaments Gf, Gf,... Are guided to the inside of the guide member 34 or to a position along the movement path of the guide member 34, and the two focusing rollers 31. Are simultaneously moved, and rotation driving of these focusing rollers 31 and 31 is started.

As a result, a predetermined tension is applied to the plurality of glass filaments Gf, Gf,...・ Gf ... will be pressed.
At the same time, these glass filaments Gf, Gf,... Are bundled through the groove portions 31a of the respective condensing rollers 31 and converged into one strand Gs.

After the focusing roller 31 is moved to the “focusing position”, the winding device 40 is activated.
Thereby, both the rotational drive of the spindle 43 and the traverse mechanism 45 are started.

  As a result, the bobbins 44 and 44 on the spindle 43 are both driven to rotate at a predetermined rotational speed, and the strands Gs and Gs are wound around the traverse mechanism 45 while traversing.

Thereafter, when one strand of the bobbin 44 is wound with a strand Gs of a predetermined length and is in a “full winding state”, the turret disc 42 is rotated by 180 °, and the other bobbin 44 is moved to the vicinity of the traverse mechanism 45, that is, The strand Gs is moved to the “execution position” of the winding operation.
As a result, the strand Gs in the “full winding state” is cut and simultaneously wound at a predetermined position (one end portion) of the other bobbin 44. Thereafter, the strand Gs is newly wound on the other bobbin 44. It will be rolled up.
Thus, the strands Gs having a predetermined length are wound around the bobbins 44 and 44 to form the strand wound bodies Sk and Sk.

  As described above, the “spinning process” in which the plurality of spun glass filaments Gf, Gf,...

  When a new strand wound Sk is subsequently formed, a plurality of glass filaments Gf, Gf,... Suspended from the bushing 10 are passed through the traverse mechanism 45 and again at a predetermined position of each bobbin 44. And the operation procedure described above is repeated.

  By the way, when the strand Gs is wound around the bobbin 44 that is driven to rotate at a predetermined rotational speed, the glass filament Gf may be cut due to external factors (for example, addition of impact force or change in temperature / humidity). is there.

At the time of restarting the “spinning process” by cutting the glass filament Gf, the following operation procedure is followed.
That is, for example, when the glass filament Gf is cut during the winding operation, the rotational drive of the spindle 43 and the traverse mechanism 45 are temporarily stopped.
On the other hand, the rotation driving of the two focusing rollers 31 and 31 is stopped and the focusing rollers 31 and 31 are moved horizontally to the “guide position”.

  Then, the unfinished strand wound body Sk made of the glass filament Gf cut in the middle portion is removed from the spindle 43.

  Here, when there is one unfinished strand winding Sk removed from the spindle 43, a new bobbin 44 is immediately inserted into the spindle 43 in place of the unfinished strand winding Sk, and the bobbin 44 At the predetermined position, the tips of the plurality of glass filaments Gf, Gf,.

  Then, after guiding a plurality of glass filaments Gf, Gf... So as to be located inside the guide member 34, the two focusing rollers 31 and 31 are simultaneously moved horizontally to the “focusing position”, and these Then, the rotational driving of the focusing rollers 31 and 31 is started, and then the rotational driving of the spindle 43 and the traversing operation of the traverse mechanism 45 are started, and the operation procedure described above is repeated thereafter.

On the other hand, when there are two unfinished strand windings Sk and Sk extracted from the spindle 43, the turret board 42 is rotated by 180 °, and the other spindle 43 is moved to the “execution position of the winding operation of the strand Gs. To "".
In addition, two bobbins 44 and 44 not yet wound with the strand Gs are inserted in advance on the other spindle 43.

  Thereafter, a plurality of glass filaments Gf, Gf,... Drawn from the bushing 10 are wound around the bobbins 44 again through the traverse mechanism 45, and the above-described operation procedure is repeated thereafter. It becomes.

[Focusing device 130 (another embodiment)]
Next, the configuration of the focusing device 130 according to another embodiment of the present invention will be described in detail with reference to FIG.
The focusing device 130 in another embodiment has a configuration that is substantially equivalent to the focusing device 30 described above, but is greatly different from the focusing device 30 in the configuration of the movable means 133.
Therefore, in the following description, differences from the focusing device 30 will be mainly described, and descriptions of configurations equivalent to the focusing device 30 will be omitted.

  The focusing device 130 includes a single focusing roller 131, a driving unit 132 that rotationally drives the focusing roller 131, and a movable unit 133 that moves the focusing roller 131 together with the driving unit 132.

The drive means 132 extends in the horizontal direction (for example, leftward in the present embodiment) and coaxially from one side surface of the housing 132A in which a drive motor that is a drive source, a speed reduction mechanism, and the like are installed. A single output shaft 132B or the like is used.
In addition, the converging roller 131 is coaxially inserted into the output shaft 132B.

  Then, the driving unit 132 drives the focusing roller 131 to rotate at a predetermined rotation direction and rotation speed via the output shaft 132B.

On the other hand, the movable means 133 includes a base member 133A that holds the driving means 132, and the base member 133A is configured to be rotatable in the horizontal direction around the point G.
The base member 133A is provided with an actuator (not shown) made of, for example, a stepping motor or an air cylinder.

  When the base member 133A is rotated by an actuator (not shown), the focusing roller 131 is guided while applying tension to the plurality of glass filaments Gf, Gf,. The “focusing position (for example, the position indicated by the“ focusing roller 131A ”in FIG. 5)” and the “guide position (for example, the“ focusing roller 131B in FIG. 5 ”) closer to the operator M than the“ focusing position ”. Between the position indicated by “”) and the housing 132A.

10 bushing 31 focusing roller 131 focusing roller (another embodiment)
34 Guide member Gf Glass filament Gs Strand

Claims (3)

A forming process for forming a plurality of glass filaments by drawing the molten glass downward from a plurality of holes provided in the bushing, and a sizing agent is applied to the surface of the plurality of glass filaments by a sizing agent coating device. A bundling agent coating step, and a strand forming step of bundling a plurality of glass filaments coated with the bundling agent by a bundling device having a bundling member,
In the strand forming step, an operator guides the plurality of glass filaments to the converging member of the bundling device at the start of the strand formation, and bundling of the bundling device at the time of strand formation after the strand formation is started. A method for producing a strand comprising a glass filament converging step of converging the plurality of glass filaments by a member to form the strand,
In the guiding step, the worker guides the plurality of glass filaments to the focusing member of the focusing device that is arranged at a position closer to the operator than the position at the time of forming the strand.
The manufacturing method of the strand characterized by the above-mentioned. In the guiding step, the operator guides the plurality of glass filaments to a converging member of the converging device arranged on a substantially perpendicular line of the converging agent application device.
The manufacturing method of the strand of Claim 1 characterized by the above-mentioned. A bushing having a plurality of holes through which molten glass can be drawn;
A sizing agent application device for applying and applying a sizing agent to a plurality of glass filaments formed from molten glass drawn from the hole, sliding on the glass filament;
A strand production apparatus comprising: a bundling device having a bundling member for guiding and bundling the plurality of glass filaments coated with the bundling agent to form a glass strand;
The strand manufacturing apparatus, wherein the converging member is configured to be movable in a horizontal direction.

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