WO2013065195A1 - Fiber-bundle cutting device and hollow-fiber-bundle manufacturing device - Google Patents

Abstract

Provided are: a fiber-body cutting device that cuts a fiber bundle, into which a plurality of fibers are bundled, in a direction perpendicular to the long direction of the fiber bundle, said fiber-body cutting device being capable of preventing cutting problems at the cutting plane; and a hollow-fiber-bundle manufacturing device. A cutting device (300) provided with the following: a first holding member (321) that holds a fiber bundle (Bf) around the circumference thereof; a second holding member (322) that holds the fiber bundle (Bf), around the circumference thereof, at a point near the first holding member (321) but at a separation therefrom in a long direction (W); and a rotating blade (331) that cuts the fiber bundle (Bf) between the first holding member (321) and the second holding member (322). A first holding pressure with which the first holding member (321) holds the fiber bundle (Bf) is greater than a second holding pressure with which the second holding member (322) holds the fiber bundle (Bf). A first holding surface area with which the first holding member (321) holds the fiber bundle (Bf) is larger than a second holding surface area with which the second holding member (322) holds the fiber bundle (Bf).

Description

Thread bundle cutting device and hollow fiber bundle manufacturing apparatus

The present invention relates to a yarn bundle cutting device and a hollow fiber bundle manufacturing device, particularly a hollow fiber blood treatment device (for example, hemodialysis, blood filtration, hemodiafiltration, plasma component fractionation, plasma separation, etc.) The present invention relates to the manufacture of a hollow fiber bundle for a hollow fiber type blood treatment apparatus used in the above.

For example, a bundle of a large number of yarns has been conventionally used as a hollow fiber bundle of a large number of predetermined hollow fibers (specifically, about 10,000) as a hollow fiber bundle, hemodialysis, blood filtration, hemodialysis. It is used in a hollow fiber blood processing apparatus that performs blood processing such as filtration, plasma component fractionation, and plasma separation.

As a method of bundling a large number of hollow fibers into a hollow fiber bundle, conventionally, a hollow aggregate yarn bundle in which hollow fibers that are continuously manufactured and move along the longitudinal direction are assembled together is rotated into a polygonal shape. An annular hollow bundle bundle is formed around a reel (for example, a hexagonal cassette frame), and the formed hollow bundle bundle is cut into a predetermined length to be bundled into a hollow fiber bundle having a predetermined length. A method of cutting a hollow fiber bundle in an orthogonal direction orthogonal to the longitudinal direction is known.

Further, a hollow aggregate yarn bundle obtained by assembling a plurality of continuous hollow fibers (specifically, about 500 to 800) is cut into a hollow fiber bundle cut body having a predetermined length, and the hollow A plurality of yarn bundle cut bodies are collected and bundled into a hollow fiber bundle of a predetermined length, and a hollow fiber bundle is produced by cutting the bundled hollow fiber bundle of a predetermined length into a shorter predetermined length. In some cases (for example, see Patent Document 1).

JP 2006-247002 A

By the way, when a yarn bundle (specifically, a hollow fiber bundle) is cut in a direction orthogonal to the longitudinal direction, cutting defects such as yarn disturbance and uncut residue are likely to occur on the cut surface.

Therefore, the present invention is a yarn bundle cutting device that cuts a bundle of bundles of a large number of yarns in a direction orthogonal to the longitudinal direction, and cuts the yarn on the cut surface such as turbulence and uncut portions. It is an object of the present invention to provide a yarn bundle cutting device and a hollow fiber bundle manufacturing device that can suppress the occurrence of defects.

In order to solve the above problems, the present inventor has intensively studied and developed, and as a result of repeated trial and error, a yarn bundle that cuts a bundle of bundles of many yarns in an orthogonal direction perpendicular to the longitudinal direction. In the body cutting device, the yarn bundle body is held at a position close to the first holding member in the longitudinal direction by the second holding member while holding the outer periphery of the yarn bundle body by the first holding member. In a state in which the outer peripheral portion of the yarn bundle is held, the first blade holding member and the second holding member of the yarn bundle body are cut by a rotary blade. A first holding pressure for holding the yarn bundle body by the holding member is larger than a second holding pressure for holding the yarn bundle body by the second holding member, and the yarn bundle body is held by the first holding member. The first holding area to be used is the second holding member and the yarn bundle body If greater than the second holding area for holding and found to be able to suppress the occurrence of cutting defects such as leaving disturbance or cutting of the yarn in the cutting plane.

The present invention is based on such knowledge and provides the following yarn bundle cutting device and hollow fiber bundle manufacturing device.

(1) Yarn bundle cutting device A yarn bundle cutting device that cuts a yarn bundle in which a large number of yarns are bundled in an orthogonal direction perpendicular to the longitudinal direction, and holds the outer periphery of the yarn bundle. A first holding member; a second holding member that holds the outer peripheral portion of the yarn bundle body at a position close to the first holding member in the longitudinal direction; and the first holding member and the second holding member. A rotary blade that cuts between the first holding member and the second holding member of the yarn bundle held by a member, and the yarn bundle is held by the first holding member when holding the yarn bundle. The first holding pressure for holding the yarn bundle body with the second holding member is larger than the second holding pressure for holding the yarn bundle body with the second holding member, and the first holding area for holding the yarn bundle body with the first holding member, A configuration that is larger than a second holding area for holding the yarn bundle by the second holding member; A yarn bundle cutting device characterized by that.

(2) Hollow fiber bundle manufacturing apparatus In a bundled device that bundles a large number of yarns into a yarn bundle, a packaging sheet wound around the yarn bundle, and the packaging sheet around which the packaging sheet is wound A packaging device for welding the packaging sheet, and a yarn bundle cutting device according to the present invention for cutting the yarn bundle to which the packaging sheet is welded into a hollow fiber bundle having a predetermined length. An apparatus for producing a hollow fiber bundle, wherein a hollow fiber bundle for a hollow fiber type blood treatment apparatus is produced using a hollow fiber as the yarn.

According to the present invention, when holding the yarn bundle body, the first holding pressure for holding the yarn bundle body by the first holding member is used, and the second holding member holding the yarn bundle body by the second holding member. The first holding area for holding the yarn bundle body with the first holding member for holding the outer peripheral portion of the yarn bundle body with a holding pressure larger than the holding pressure is spaced from the first holding member in the longitudinal direction. And the second holding member that holds the outer periphery of the yarn bundle at an adjacent position is larger than the second holding area for holding the yarn bundle, so that the yarn is disturbed or cut on the cut surface. It is possible to suppress the occurrence of cutting defects such as leftovers.

In the present invention, the first holding member and the second holding member can each be exemplified by a portion having a concave strip portion along the longitudinal direction in a portion that holds the yarn bundle body.

In this specific matter, the yarn bundle body can be reliably held by the concave strip portions in the first holding member and the second holding member.

In the present invention, the second holding member is provided on the opposite side of the longitudinal direction from the first holding member, and has a groove portion deeper than the groove portion in the second holding member. The cover member is further provided and the aspect which covers the outer peripheral part of the said thread bundle body by the said recessed strip part in the said cover member can be illustrated.

In this specific matter, the first holding member of the second holding member is formed by the concave portion deeper than the concave portion of the second holding member by the cover member provided on the opposite side of the longitudinal direction. The rotary blade can cut between the first holding member and the second holding member of the yarn bundle in a state where the outer periphery of the yarn bundle is covered. It can be received in the cover member.

In the present invention, the first holding member and the second holding member are respectively a pair of first holding members and a pair of second holding members that hold the yarn bundle body from opposite sides in the orthogonal direction. The recesses in the pair of first holding members and the pair of second holding members have a distance in a direction perpendicular to both the longitudinal direction and the orthogonal direction toward the bottom along the orthogonal direction. The aspect which has two inclined surfaces which become small gradually according to can be illustrated.

In this specific matter, the concave portions of the first holding member and the second holding member gradually increase as the distance in the direction orthogonal to both the longitudinal direction and the orthogonal direction approaches the bottom along the orthogonal direction. Since the two inclined surfaces are small, even if the yarn bundle is selected from a plurality of types of yarn bundles having different diameters, the diameter of the yarn bundle can be easily set. Accordingly, the yarn bundle body can be reliably held.

In the present invention, the yarn bundle body is a package sheet welded yarn bundle body in which a packaging sheet is wound and welded, and the packaging sheet is welded prior to cutting the package sheet welded yarn bundle body. An aspect further comprising a welding apparatus can be exemplified.

According to this specific matter, the yarn bundle body can be cut in a state where the packaging sheet is securely fixed by welding, and thereby it is possible to further suppress the occurrence of cutting failure on the cut surface.

In the present invention, the welding apparatus can exemplify a mode in which at least a part of the linear region extending in the longitudinal direction is welded at a plurality of locations in the circumferential direction of the outer peripheral portion of the package sheet welded yarn bundle.

In this specific matter, since the welding device welds at least a part of the linear region extending in the longitudinal direction at a plurality of locations in the circumferential direction of the outer periphery of the package sheet welded yarn bundle, the packaging sheet The yarn bundle body can be cut in a state where it is more securely fixed by welding, and it is possible to further suppress the occurrence of cutting failure on the cut surface.

By the way, it is often difficult to reliably weld the packaging sheet by the welding device at the other end of the yarn bundle.

Therefore, in the present invention, the yarn bundle body further includes a conveyance unit that conveys the yarn bundle body in the traveling direction on one side in the longitudinal direction, and a sensor that detects an upstream end of the yarn bundle body in the traveling direction, The bundle is sequentially cut by the rotary blade while being conveyed in the traveling direction by the conveying unit, and when the upstream end of the yarn bundle is detected by the sensor, the welding is performed. A mode in which the welding time to the packaging sheet by the apparatus is made longer than the welding time other than when the upstream end of the yarn bundle is detected can be exemplified.

In this specific matter, when the upstream end of the yarn bundle body is detected by the sensor, the welding time to the packaging sheet by the welding device is other than when the upstream end of the yarn bundle body is detected. Since it is longer than the welding time, it becomes possible to reliably weld the packaging sheet at the upstream end portion of the yarn bundle body.

As described above, according to the yarn bundle cutting device and the hollow fiber bundle manufacturing device according to the present invention, it is possible to suppress the occurrence of cutting failures such as yarn disturbance or uncut residue on the cut surface.

FIG. 1 is a block diagram showing a schematic configuration showing an example of a hollow fiber bundle manufacturing apparatus according to the present embodiment. FIG. 2 is a schematic plan view of the cutting device in the hollow fiber bundle manufacturing apparatus according to the present embodiment viewed from above in the vertical direction. FIG. 3 is a schematic perspective view showing a third holding member in the cutting device, wherein (a) and (b) are the state where the packaged sheet-welded hollow fiber bundle is not held and is held, respectively. It is the schematic which shows a state. FIG. 4 is a schematic perspective view showing the first holding member in the cutting device, and (a) and (b) are the state where the packaged sheet-welded hollow fiber bundle is not held and is held, respectively. It is the schematic which shows a state. FIG. 5 is a schematic perspective view showing a second holding member and a cover member in the cutting device, wherein (a) and (b) show a state in which the packaged sheet-welded hollow fiber bundle is not held and held, respectively. It is the schematic which shows the state which is carrying out. FIG. 6 is a schematic view showing a second holding member and a cover member in the cutting device, and (a) and (b) are a front view and a plan view, respectively. FIG. 7 is a schematic view showing a welding device portion in the cutting device, and (a) and (b) are a plan view and a side view, respectively. FIG. 8 is a schematic side view of the protruding yarn cutting device in the hollow fiber bundle manufacturing apparatus according to the present embodiment as viewed from one side in the width direction. FIG. 9 is a schematic perspective view showing a first holding member, a second holding member, and a cover member in the protruding yarn cutting device, and (a) and (b) are hollow fiber bundles each having a package sheet welded thereto, respectively. It is the schematic which shows the state which is not holding | maintaining the protrusion thread | yarn of a body, and the state currently hold | maintained.

Embodiments according to the present invention will be described below with reference to the drawings. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.

FIG. 1 is a block diagram showing a schematic configuration showing an example of a manufacturing apparatus 10 for a hollow fiber bundle Bg according to the present embodiment.

The hollow fiber bundle Bg production apparatus 10 is a dry production apparatus that produces a hollow fiber bundle Bg using a dried hollow fiber Ba, and includes a bundling device 100, a packaging device 200, a cutting device 300, and a production device. And a control unit 400 that controls the entire apparatus 10.

In the production apparatus 10, under the instruction of the control unit 400, hundreds (specifically, 512 to 768) of dried hollow fibers Ba sent from the spinning unit 20 are collected by the bundling device 100 with the hollow aggregate yarn. The bundle Bb is assembled into a bundle Bb, and the hollow bundle bundle Bb is sequentially cut into hollow fiber bundle cut bodies Bc having a predetermined length. Is bundled to about 10,000 hollow fiber bundles Bd, and the packaging apparatus 200 makes the hollow fiber bundles Bd columnar by the packaging device 200 and wraps the packaging sheets S around the hollow fiber bundles Bd to about double to quadruple. A plurality of windings in the circumferential direction of the outer peripheral portion (specifically, the outer peripheral surface) of the packaging sheet S in a cylindrical hollow fiber bundle (hereinafter referred to as a hollow fiber bundle Be with a packaging sheet) wound with the packaging sheet S. So that the locations (eg 4 locations) are welded evenly in the circumferential direction You have me.

In the manufacturing apparatus 10, under the instruction of the control unit 400, the cylindrical hollow fiber bundle body to which the packaging sheet S is welded (hereinafter referred to as a packaging sheet welded hollow fiber bundle body Bf) is used in the cutting apparatus 300. The cylindrical hollow fiber bundle Bg having a predetermined length is cut into a predetermined length, and the process proceeds to the next inspection process.

In addition, as a material which can be used for hollow fiber Ba, although not limited to it, resin materials, such as a cellulose diacetate, a cellulose polyacetate, and a polyether sulfone, can be illustrated. As the material of the packaging sheet S, any material can be used as long as it has appropriate flexibility and slipperiness so as to be surely wound around the peripheral surface of the hollow fiber bundle Bd. Examples of materials that can be used for the packaging sheet S include resin materials such as polypropylene, polyethylene, polyester, and polytetrafluoroethylene. In particular, olefin-based plastics such as polypropylene and polyethylene have cost and moldability. It is preferable from the point. Here, the packaging sheet S is made of high-density polyethylene.

The control unit 400 includes a processing unit 410 such as a CPU (Central Processing Unit) and a storage unit 420 including a memory such as a ROM (Read Only Memory) and a RAM (Random Access Memory). Specifically, the manufacturing apparatus 10 controls various components by causing the processing unit 410 of the control unit 400 to load and execute a control program stored in advance in the ROM of the storage unit 420 on the RAM of the storage unit 420. It is like that.

Next, the hollow fiber bundle Bg cutting device 300 according to the present embodiment will be described in detail below.

FIG. 2 is a schematic plan view of the cutting device 300 in the hollow fiber bundle Bg manufacturing apparatus 10 according to the present embodiment as viewed from above in the vertical direction Z. FIG. 3 is a schematic perspective view showing the third holding member 323 in the cutting device 300. FIG. 3A and FIG. 3B are schematic views showing a state where the packaged sheet-welded hollow fiber bundle Bf is not held and a state where it is held, respectively. FIG. 4 is a schematic perspective view showing the first holding member 321 in the cutting device 300. 4 (a) and 4 (b) are schematic views showing a state where the packaged sheet-welded hollow fiber bundle Bf is not held and a state where it is held, respectively. FIG. 5 is a schematic perspective view showing the second holding member 322 and the cover member 324 in the cutting device 300. FIG. 5A and FIG. 5B are schematic views showing a state where the packaged sheet-welded hollow fiber bundle Bf is not held and a state where it is held, respectively. FIG. 6 is a schematic diagram showing the second holding member 322 and the cover member 324 in the cutting device 300. Moreover, Fig.6 (a) and FIG.6 (b) are the front views and top views, respectively.

The cutting device 300 (see FIG. 2) is a packaged sheet-welded hollow fiber bundle Bf in which a plurality of locations in the circumferential direction of the outer circumferential surface of the packaging sheet S in the hollow sheet bundle Be with a packaging sheet (see FIG. 1) are welded. The hollow fiber bundle Bg having a predetermined length is obtained from the hollow sheet bundle Bf that has been welded with the packaging sheet by cutting in the orthogonal direction (here, the width direction Y) orthogonal to the longitudinal direction W.

The cutting device 300 according to the present embodiment includes a first holding member 321 that holds the outer peripheral portion (specifically, the outer peripheral surface) of the packaged and welded hollow fiber bundle Bf, the first holding member 321, and the longitudinal direction W. The outer peripheral part (specifically, the package sheet welded hollow fiber bundle Bf at a position close to the predetermined interval (specifically, an interval slightly larger than the width of the rotary blade 331 described later) Of the first holding member 321 and the second holding member 322 of the welded hollow fiber bundle Bf held by the first holding member 321 and the second holding member 322. And a rotary blade 331 for cutting the gap. Specifically, the first holding member 321 holds the upstream side in the traveling direction W1 of the packaged sheet-welded hollow fiber bundle Bf with reference to the cutting position by the rotary blade 331. The second holding member 322 holds the downstream side in the traveling direction W1 of the packaged and welded hollow fiber bundle Bf with reference to the cutting position by the rotary blade 331. The gap between the rotary blade 331 and the first holding member 321 and the gap between the rotary blade 331 and the second holding member 322 at the time of cutting can be about 1 mm or less or about several mm or less.

In the present embodiment, the cutting device 300 further includes a cover member 324 provided on the opposite side of the longitudinal direction W from the first holding member 321 of the second holding member 322. The cover member 324 has a groove 324a that is deeper than a groove 322a described later in the second holding member 322. The cover member 324 is configured to cover the outer peripheral portion (specifically, the outer peripheral surface) of the packaged sheet-welded hollow fiber bundle Bf with the concave strip portion 324a. Specifically, the cover member 324 is adjacent to the packaged sheet welded hollow fiber bundle Bf at a predetermined interval (specifically, an interval of about several millimeters) and is attached in close proximity to the packaged sheet welded hollow fiber bundle. It is set as the structure which covers the outer peripheral surface of the body Bf.

Specifically, the cutting device 300 includes a conveying unit 310 that conveys the packaged welded hollow fiber bundle Bf toward a cutting position on the downstream side on one side in the longitudinal direction W (traveling direction W1). A holding unit 320 that holds the transported packaging sheet welded hollow fiber bundle Bf, and a packaging sheet welded hollow fiber bundle Bf that is held by the holding unit 320 has a predetermined length of hollow fiber bundle Bg. The control unit 400 controls the operation of the transport unit 310, the holding unit 320, and the cutting unit 330. Note that the cutting apparatus 300 may include a control unit that controls the entire cutting apparatus 300.

In the cutting device 300 according to the present embodiment, the control unit 400 causes the holding unit 320 to convey the packaging sheet welded hollow fiber bundle Bf intermittently in the traveling direction W1 by a predetermined distance by the transport unit 310. And the cutting unit 330 sequentially cuts.

The conveyance unit 310 includes a third holding member 310a including a third holding member 323 that holds the outer peripheral portion (specifically, the outer peripheral surface) of the packaged welded hollow fiber bundle Bf, and the third holding mechanism 310a in the longitudinal direction. And a moving mechanism 310b that reciprocates in W.

The third holding mechanism 310 a includes a third holding member 323 and a third holding actuator 311.

The third holding member 323 (see FIG. 3) is a pair of third holding members that hold the packaged sheet-welded hollow fiber bundle Bf from the mutually opposing sides in the orthogonal direction (here, the width direction Y) orthogonal to the longitudinal direction W. Members 323 and 323 are provided.

Specifically, the pair of third holding members 323 and 323 are concave stripes formed along the longitudinal direction W (extending in the longitudinal direction W) on opposite sides (specifically, facing surfaces 323d and 323d). Recesses 323a and 323a are provided. The distance between the longitudinal direction W and the perpendicular direction (here, the width direction Y) (here, the vertical direction Z) is the width direction of the concave portions 323a, 323a so as to open obliquely as the distance from the bottom increases. A shape having two inclined surfaces 323b and 323b that gradually become smaller along the bottom along Y and a bottom surface 323c along the vertical direction Z that is continuous with the bottom-side ends of the two inclined surfaces 323b and 323b. It is said that. The pair of third holding members 323 and 323 have the same shape. Specifically, each of the pair of third holding members 323 and 323 is made of a resin material. In addition, the shape of the concave strips 323a and 323a extending in the longitudinal direction W is a constant shape in the longitudinal direction W. The same applies to the groove portions 321a and 321a, the groove portions 322a and 322a, and the groove portions 324a and 324a described later.

In the third holding mechanism 310a, the pair of third holding members 323 and 323 are arranged close to or in contact with each other (specifically, the opposing surfaces 323d and 323d) where the concave portions 323a and 323a are formed (in the illustrated example). Packaging sheet welding by a substantially hexagonal columnar shape or a hexagonal columnar shape (substantially hexagonal columnar shape in which the upper part and the lower part are opened in the illustrated example) formed by the concave strips 323a and 323a facing each other. It is set as the structure which hold | maintains used hollow fiber bundle Bf. Here, the two inclined surfaces 323b and 323b of the concave portions 323a and 323a of the pair of third holding members 323 and 323 are in contact with the packaged sheet-welded hollow fiber bundle Bf. In addition, depending on the size of the diameter of the packaged sheet welded hollow fiber bundle Bf, the bottom surfaces 323c of the concave strips 323a and 323a may further contact the packaged sheet welded hollow fiber bundle Bf.

The third holding actuator 311 (see FIG. 2) is a pair of movement drive units 311a and 311a that reciprocate the pair of third holding members 323 and 323 in the orthogonal direction (here, the width direction Y) orthogonal to the longitudinal direction W. Is included. As the movement drive unit 311a, a cylinder, a direct drive mechanism that converts the rotational motion of the motor into linear reciprocating motion, or the like can be used. Here, the moving drive unit 311a is an air cylinder from the viewpoint of simple structure and easy maintenance. The same applies to each movement drive unit described later.

In the cutting device 300 according to the present embodiment, the control unit 400 operates the third holding actuator 311 to operate one third holding member 323 when performing a holding operation of the pair of third holding members 323 and 323. And the other third holding member 323 are moved in a direction in which they approach each other in the width direction Y. On the other hand, when performing the holding release operation of the pair of third holding members 323 and 323, the control unit 400 operates the third holding actuator 311 and one third holding member 323 and the other third holding member 323. Are moved in a direction in which they are separated from each other in the width direction Y.

The moving mechanism 310b includes a sandwiching actuator 312a including a movement driving unit 312b that reciprocates the third holding mechanism 310a in the longitudinal direction W.

The holding unit 320 includes a first holding mechanism 320a including a first holding member 321 that holds the package sheet welded hollow fiber bundle Bf, and a second holding member 322 that holds the package sheet welded hollow fiber bundle Bf. And a second holding mechanism 320b.

Specifically, the control unit 400 holds the package sheet welded hollow fiber bundle Bf at the initial position by the third holding mechanism 310a, and the package sheet welded hollow fibers of the first and second holding mechanisms 320a and 320b. The holding operation to the bundle Bf is canceled, and the third holding mechanism 310a holding the hollow sheet bundle Bf with the package sheet welded is transported by the moving mechanism 310b by a predetermined distance in the advancing direction W1 and stopped. After the hollow fiber bundle Bf is held by the first and second holding mechanisms 320a and 320b, the holding operation of the third holding mechanism 310a to the packaged sheet welded hollow fiber bundle Bf is released, and the rotary blade 331 is used for packaging. The sheet-welded hollow fiber bundle Bf is cut, and the third holding mechanism 310a is moved back in the direction W2 opposite to the moving direction W1 by the moving mechanism 310b to return to the initial position. It has a structure in which repeated.

The first holding mechanism 320a includes a first holding member 321 and a first holding actuator 325.

The first holding member 321 (see FIG. 4) is a pair of first holdings that hold the packaged sheet-welded hollow fiber bundle Bf from opposite sides in the orthogonal direction (here, the width direction Y) orthogonal to the longitudinal direction W. The members 321 and 321 are used.

Specifically, the pair of first holding members 321 and 321 are concave stripes formed along the longitudinal direction W (extending in the longitudinal direction W) on opposite sides (specifically, facing surfaces 321d and 321d). Recesses 321a and 321a are provided. The distance between the longitudinal direction W and the orthogonal direction (here, the width direction Y) (in this case, the vertical direction Z) is the width direction of each of the concave portions 321a, 321a so as to open obliquely as the distance from the bottom increases. A shape having two inclined surfaces 321b and 321b that gradually become smaller along the bottom along Y, and a bottom surface 321c along the vertical direction Z that is continuous with the bottom end of the two inclined surfaces 321b and 321b. It is said that. Each of the pair of first holding members 321 and 321 has the same shape. Specifically, each of the pair of first holding members 321 and 321 is made of a resin material.

The first holding mechanism 320a has a pair of first holding members 321 and 321 that are opposed to or in contact with each other (specifically, the opposed surfaces 321d and 321d) in which the concave strips 321a and 321a are formed (in the illustrated example). The packaging sheet is welded in a substantially hexagonal columnar shape or a hexagonal columnar shape (in the illustrated example, a generally hexagonal columnar shape with the upper and lower portions opened) formed by the concave strips 321a and 321a facing each other. It is set as the structure which hold | maintains used hollow fiber bundle Bf. Here, the two inclined surfaces 321b and 321b of the concave portions 321a and 321a of the pair of first holding members 321 and 321 are in contact with the packaged and welded hollow fiber bundle Bf. Further, depending on the size of the diameter of the packaging sheet welded hollow fiber bundle Bf, the bottom surfaces 321c of the recessed strip portions 321a and 321a may further contact the packaging sheet welded hollow fiber bundle Bf.

The first holding actuator 325 (see FIG. 2) includes a pair of movement drive units 325a and 325a that reciprocate the pair of first holding members 321 and 321 in the orthogonal direction (here, the width direction Y) orthogonal to the longitudinal direction. Contains.

In the cutting device 300 according to the present embodiment, the control unit 400 operates the first holding actuator 325 to perform one first holding member 321 when holding the pair of first holding members 321 and 321. And the other first holding member 321 are moved in a direction in which the width direction Y approaches each other. On the other hand, when performing the holding release operation of the pair of first holding members 321, 321, the control unit 400 operates the first holding actuator 325 and one first holding member 321 and the other first holding member 321. Are moved in a direction in which they are separated from each other in the width direction Y.

The second holding mechanism 320b includes a second holding member 322 and a second holding actuator 326.

The second holding member 322 (see FIGS. 5 and 6) is a pair of holding the packaged sheet-welded hollow fiber bundle Bf from opposite sides in the orthogonal direction (here, the width direction Y) orthogonal to the longitudinal direction W. The second holding members 322 and 322 are used. The cover member 324 is a pair of cover members 324 and 324 provided on the pair of second holding members 322 and 322, respectively.

Specifically, the pair of second holding members 322 and 322 are concave stripes formed along the longitudinal direction W (extending in the longitudinal direction W) on opposite sides (specifically, facing surfaces 322d and 322d). Recesses 322a and 322a are provided. The distance between the longitudinal direction W and the orthogonal direction (here, the width direction Y) (here, the vertical direction Z) is the width direction of the concave portions 322a, 322a so as to open obliquely as the distance from the bottom increases. A shape having two inclined surfaces 322b and 322b that gradually become smaller along the bottom along Y and a bottom surface 322c along the vertical direction Z that is continuous with the bottom side ends of the two inclined surfaces 322b and 322b. It is said that. Both of the pair of second holding members 322 and 322 have the same shape.

In addition, as for the recessed strip part 321a and 321a in a pair of 1st holding member 321,321, and the recessed strip part 322a and 322a in a pair of 2nd holding member 322,322, the inclination angle of the inclined surface with respect to the up-down direction Z (bottom surface). Both are at the same angle. In addition, the inclination angles of the inclined surfaces with respect to the vertical direction Z (bottom surface) of the concave portions 323a and 323a in the pair of third holding members 323 and 323 are both vertical directions of the concave portions 321a and 321a and the concave portions 322a and 322a. The angle is the same as the angle of inclination of the inclined surface with respect to Z (bottom surface).

If the pair of cover members 324 and 324 can hold the hollow fiber bundle Bg after cutting when the hollow fiber bundle Bf after packaging sheet welding is held by the pair of second holding members 322 and 322, It may be any shape. In the present embodiment, the pair of cover members 324 and 324 is formed along the longitudinal direction W (extends in the longitudinal direction W) on the sides facing each other (specifically, the facing surfaces 324d and 324d). Two inclined surfaces 324b and 324b, in which the distance in the vertical direction Z gradually decreases toward the bottom along the width direction Y so that the concave strips 324a and 324a open obliquely as the distance from the bottom increases, The two inclined surfaces 324b and 324b have a bottom surface 324c along the vertical direction Z that is continuous with the bottom side ends. Each of the pair of cover members 324 and 324 has the same shape. Specifically, each of the pair of second holding members 322 and 322 and the pair of cover members 324 and 324 is made of a resin material. Here, one second holding member 322 and one cover member 324 are integrally formed, and the other second holding member 322 and the other cover member 324 are integrally formed.

Here, the groove portions 321a and 321a in the pair of first holding members 321 and 321, the groove portions 322a and 322a in the pair of second holding members 322 and 322, and the groove portions in the pair of third holding members 323 and 323, respectively. 323a and 323a may have a shape having an arc curved surface in which a predetermined radius (for example, the same radius as that of the packaged welded hollow fiber bundle Bf) is constant in the longitudinal direction W. Further, when the concave strip portions 321a and 321a, the concave strip portions 322a and 322a, and the concave strip portions 323a and 323a have a shape having an arcuate curved surface, the concave strip portions 324a and 324a in the pair of cover members 324 and 324 are: You may be made into the shape which has the circular arc curved surface of a larger radius than the radius of the circular curved surface of the concave strip part 321a, 321a, the concave strip part 322a, 322a, and the concave strip part 323a, 323a.

In the second holding mechanism 320b, the pair of second holding members 322 and 322 are placed close to or in contact with each other (specifically, the facing surfaces 322d and 322d) where the concave strip portions 322a and 322a are formed (in the illustrated example). Packaging sheet welding by a substantially hexagonal columnar shape or a hexagonal columnar shape (substantially hexagonal columnar shape in which the upper part and the lower part are opened in the illustrated example) formed by recesses 322a and 322a facing each other. It is set as the structure which hold | maintains used hollow fiber bundle Bf. Here, the two inclined surfaces 322b and 322b of the concave strip portions 322a and 322a of the pair of second holding members 322 and 322 are in contact with the packaged sheet-welded hollow fiber bundle Bf. In addition, depending on the size of the diameter of the packaged sheet welded hollow fiber bundle Bf, the bottom surfaces 322c of the recessed strip portions 322a and 322a may further contact the packaged sheet welded hollow fiber bundle Bf.

Further, the second holding mechanism 320b has a pair of cover members 324 and 324, and opposed portions (specifically, opposed surfaces 324d and 324d) where the concave strip portions 324a and 324a are formed close to or in contact with each other (in the illustrated example). By arranging them so as to be close to each other, the two inclined surfaces 324b and 324b and the bottom surface 324c of the concave portions 324a and 324a facing each other are configured to cover the packaged welded hollow fiber bundle Bf.

The second holding actuator 326 (see FIG. 2) includes a pair of movement driving units 326a and 326a that reciprocate the pair of second holding members 322 and 322 in the orthogonal direction (here, the width direction Y) orthogonal to the longitudinal direction. Contains.

In the cutting device 300 according to the present embodiment, when performing the holding operation of the pair of second holding members 322 and 322, the control unit 400 operates the second holding actuator 326 and one of the second holding members 322. And the other second holding member 322 are moved in a direction in which they approach each other in the width direction Y. On the other hand, when performing the holding release operation of the pair of second holding members 322 and 322, the control unit 400 operates the second holding actuator 326 and one second holding member 322 and the other second holding member 322. Are moved in a direction in which they are separated from each other in the width direction Y. Here, in the packaging sheet welded hollow fiber bundle Bf, the side held by the pair of second holding members 322 and 322 with respect to the cutting position of the rotary blade 331 (see FIG. 2) (the downstream side in the traveling direction W1) is The hollow fiber bundle Bg is the side to be cut.

In the cutting device 300, when the control unit 400 holds the packaged sheet welded hollow fiber bundle Bf, the packaging sheet welded hollow fiber bundle of the pair of first holding members 321 and 321 by the first holding actuator 325 is used. The predetermined pressing force applied to the body Bf is greater than the predetermined pressing force applied to the hollow sheet bundle Bf on which the pair of second holding members 322 and 322 are welded to the pair of second holding members 322 by the second holding actuator 326. is doing. Therefore, when holding the packaged sheet welded hollow fiber bundle Bf, the first holding pressure P1 [Pa] for holding the packaged sheet welded hollow fiber bundle Bf by the pair of first holding members 321 and 321 is The second holding member 322, 322 is larger than the second holding pressure P2 [Pa] for holding the package sheet welded hollow fiber bundle Bf (P1> P2).

The second holding pressure P2 may be about 1/2 or less of the first holding pressure P1 [(P1) / 2 <P2], more preferably about 1/4 or less [(P1) / 4 <P2].

Further, when holding the packaged sheet welded hollow fiber bundle Bf, the first holding area S1 [m ² ] where the pair of first holding members 321 and 321 contact the packaged sheet welded hollow fiber bundle Bf is: The pair of second holding members 322 and 322 are larger than the second holding area S2 [m ² ] contacting the package sheet welded hollow fiber bundle Bf (S1> S2). Here, the pair of first holding members 321, 321 and the pair of second holding members 322, 322 hold the package sheet welded hollow fiber bundle Bf over the entire longitudinal direction W, and the pair of first holding members A predetermined length (holding length) L1 (see FIG. 4) in the longitudinal direction W of 321 and 321 is a predetermined length in the longitudinal direction W of the pair of second holding members 322 and 322 ( Holding length) L2 (see FIG. 5) is longer. The holding width (the width in the circumferential direction) at which the pair of first holding members 321 and 321 with respect to the package sheet welded hollow fiber bundle Bf holds the package sheet welded hollow fiber bundle Bf is a pair of second holding members. 322 and 322 are larger than the holding width (width in the circumferential direction) for holding the packaged welded hollow fiber bundle Bf.

The second holding area S2 may be ½ or less [(S1) / 2 ≧ S2], more preferably ¼ or less [(S1) / 4 ≧ S2] of the first holding area S1.

Note that the pair of first holding members 321 and 321 and the pair of third holding members 323 and 323 may have the same shape.

The cutting unit 330 (see FIG. 2) reciprocates in the orthogonal direction (here, the width direction Y) orthogonal to the longitudinal direction W with the rotary blade 331, the rotary drive unit 332 that rotationally drives the rotary blade 331, and the rotary drive unit 332. And a rotary blade moving mechanism 333 to be moved.

Specifically, the control unit 400 first and second each time the third holding mechanism 310a holding the packaged welded hollow fiber bundle Bf is conveyed by the moving mechanism 310b by a predetermined distance in the traveling direction W1. Holding the holding mechanisms 320a and 320b, while rotating the rotary blade 331 by the rotation drive unit 332, the rotary blade 331 is reciprocated in the width direction Y by the rotary blade moving mechanism 333, and the packaged sheet welded hollow fiber bundle Bf is sequentially cut into hollow fiber bundles Bg having a predetermined length.

The rotary blade 331 has a blade edge 331a provided on the outer peripheral portion, and has a disk shape (specifically, a disk shape made of metal) in which the thickness of the blade edge 331a decreases as it goes outward in the radial direction. It is considered as a rotary blade. That is, the rotary blade 331 is configured by an orthogonal surface 331b along the orthogonal direction orthogonal to the longitudinal direction W and an inclined surface 331c inclined in the longitudinal direction W with respect to the orthogonal surface 331b. Is formed. The rotary blade 331 is disposed in a direction in which the orthogonal surface 331b faces the pair of first holding members 321 and 321 and the inclined surface 331c faces the pair of second holding members 322 and 322. An angle formed by the orthogonal surface 331b and the inclined surface 331c is a predetermined angle.

The rotation drive unit 332 rotates the rotary blade 331 around the rotation axis. The rotary blade moving mechanism 333 includes an accommodating actuator 333a including a movement drive unit 333b that reciprocates the rotation drive unit 332 in the width direction Y.

The cutting device 300 according to the present embodiment further includes a welding device 340 (see FIG. 7 to be described later) for welding the packaging sheet S prior to cutting the package-welded hollow fiber bundle Bf.

FIG. 7 is a schematic view showing a welding device 340 portion in the cutting device 300. FIG. FIG. 7A and FIG. 7B are a plan view and a side view, respectively.

In the cutting device 300 according to the present embodiment, the control unit 400 causes the packaging device welded hollow fiber bundle to be welded by the welding device 340 every time the moving unit 310b (see FIG. 2) transports the traveling direction W1 by a predetermined distance. It is set as the structure which pressurizes and heat-welds with respect to the packaging sheet S in the body Bf while heating intermittently.

The welding apparatus 340 welds at least a partial region α1 of the linear region α extending in the longitudinal direction W. Note that the heat-welded region α1 preferably includes the cutting start point of the rotary blade 331.

Here, the welding device 340 includes a plurality of locations in the circumferential direction of the outer peripheral surface of the packaged welded hollow fiber bundle Bf (here, two locations on both sides in the width direction and two locations on the upper and lower sides in the vertical direction Z). Four welding portions 341, 341, 341, 341 are provided for welding a part of the region α1 in the linear region α extending in the longitudinal direction W at a total of four locations). In addition, each welding part 341,341,341,341 has the same structure, and attaches | subjects the same code | symbol. Hereinafter, one welded portion 341 will be described by using the other welded portions 341, 341, and 341 as representatives.

The welding part 341 includes a heating part 341a extending in the longitudinal direction W, a pressing part 341b that presses the heating part 341a against the outer peripheral surface (packaging sheet S) of the packaged sheet welded hollow fiber bundle Bf, and a pressing part 341b. And a welding actuator 341c including a movement drive unit (not shown) that reciprocally moves in a perpendicular direction (here, the width direction Y or the vertical direction Z). And the heating part 341a is set as the structure which heats partially the area | region (alpha) of the packaging sheet S in the packaging sheet welded hollow fiber bundle Bf in the longitudinal direction W. As shown in FIG. Here, examples of the welding temperature include about 130 ° C. to 170 ° C. Here, the welding temperature is about 140 ° C.

In the cutting device 300 according to the present embodiment, the control unit 400 operates each welding actuator 341c, 341c, 341c, 341c when performing the welding operation of each welding unit 341, 341, 341, 341. The welded portions 341 and 341 facing the width direction Y and the welded portions 341 and 341 facing the vertical direction Z are moved in the width direction Y approaching direction and the vertical direction Z approaching direction, respectively. Yes. On the other hand, the control unit 400 operates the welding actuators 341c, 341c, 341c, and 341c to oppose each of the welding parts 341, 341, 341, and 341 in the width direction Y when performing the welding release operation of the welding parts 341, 341, 341, and 341. The parts 341 and 341 and the welding parts 341 and 341 facing each other in the vertical direction Z are moved in the width direction Y and the vertical direction Z, respectively.

In addition, as a method of welding the packaging sheet S of the welding apparatus 340, the welding surface of the packaging sheet S is irradiated with ultrasonic waves in addition to the method of performing thermal welding by applying pressure while heating the welding surface of the packaging sheet S. And a technique of ultrasonic welding.

In the present embodiment, the welding apparatus 340 further includes a sensor 342 that detects an upstream end (hereinafter referred to as a termination) Bfa in the traveling direction W1 of the packaged welded hollow fiber bundle Bf. FIG. 7 shows a state in which the sensor 342 detects the terminal end Bfa of the packaged and welded hollow fiber bundle Bf.

In the cutting device 300 according to the present embodiment, the control unit 400 packages the welding time of the welding device 340 to the packaging sheet S when the sensor 342 detects the end Bfa of the packaged fiber-welded hollow fiber bundle Bf. From the welding time (for example, about 0.5 seconds) other than when the terminal end Bfa of the sheet welded hollow fiber bundle Bf is detected (specifically, when the package sheet welded hollow fiber bundle Bf itself is detected). Also, it is configured to be long (for example, about 2 to 3 seconds).

Specifically, the sensor 342 is a reflection-type optical sensor that detects reflected light that is reflected by irradiating light to the packaged sheet-welded hollow fiber bundle Bf conveyed in the traveling direction W1 by the moving mechanism 310b. ing. The sensor 342 is provided in the vicinity of the upstream side in the traveling direction W1 with respect to the welding portion 341 in the welding apparatus 340.

In the cutting device 300 described above, in cutting the packaging sheet welded hollow fiber bundle Bf into the hollow fiber bundles Bg, first, the welding device 340 uses the circumferential direction of the outer peripheral surface of the packaging sheet welded hollow fiber bundle Bf. A plurality of regions α1 in the linear region α extending in the longitudinal direction W at a plurality of locations (here, 4 locations) are welded.

Next, the packaging sheet welded hollow fiber bundle Bf is held by the pair of third holding members 323 and 323 by the third holding mechanism 310a located at the initial position, and the pair of first and second holding mechanisms 320a and 320b The first holding members 321 and 321 and the pair of second holding members 322 and 322 are brought into the holding release state, and the pair of third holding members 323 and 323 holding the package sheet welded hollow fiber bundle Bf are moved by the moving mechanism 310b. It is conveyed by a predetermined distance in the traveling direction W1. At this time, the length of the downstream side in the advancing direction W1 of the packaged sheet welded hollow fiber bundle Bf with respect to the cutting position by the cutting blade 331 is the end in the first cutting with respect to each packaged sheet welded hollow fiber bundle Bf. The length of the unnecessary waste is set to the length of the hollow fiber bundle Bg after the second time.

Next, the packaging sheet welded hollow fiber bundle Bf is held by the pair of first holding members 321 and 321 and the pair of second holding members 322 and 322 by the first and second holding mechanisms 320a and 320b, and the third holding The pair of third holding members 323 and 323 are brought into the holding release working state by the mechanism 310a.

Next, the rotary blade 321 that is rotationally driven by the rotary drive unit 332 is moved to one side in the width direction Y by the rotary blade moving mechanism 333, and the pair of first holding members 321 and 321 and the pair of second holding members 322. The pair of first holding members 321 and 321 and the pair of second holding members 322 and 322 of the packaged and welded hollow fiber bundle Bf held at 322 are cut, and the pair of third holding members are moved by the moving mechanism 310b. The members 323 and 323 are returned to the initial positions.

Thereafter, the same operation is repeated to cut a plurality of hollow fiber bundles Bg from the packaged welded hollow fiber bundles Bf, and to the packaged sheet welded hollow fiber bundles Bf sent next. The same operation is performed.

When the sensor 342 detects the end Bfa of the packaged sheet welded hollow fiber bundle Bf, the welding time of the welding device 340 to the packaged sheet S is detected as the terminal sheet Bfa of the packaged sheet welded hollow fiber bundle Bf. Make it longer than the welding time except when.

Thus, the hollow fiber bundle Bg cut by the cutting device 300 is transferred to the next step (specifically, the inspection step) by a transfer device (for example, a belt conveyor device) (not shown).

According to the cutting device 300 described above, the first holding pressure for holding the packaging sheet welded hollow fiber bundle Bf by the pair of first holding members 321 and 321 when the packaging sheet welded hollow fiber bundle Bf is held. Is larger than the second holding pressure for holding the package sheet welded hollow fiber bundle Bf by the pair of second holding members 322 and 322, and holds the outer peripheral surface of the package sheet welded hollow fiber bundle Bf. The first holding area for holding the packaged sheet-welded hollow fiber bundle Bf by the pair of first holding members 321 and 321 is close to the pair of first holding members 321 and 321 in the longitudinal direction W at a distance. The pair of second holding members 322 and 322 that hold the outer peripheral surface of the package sheet welded hollow fiber bundle Bf is larger than the second holding area that holds the package sheet welded hollow fiber bundle Bf. In, it is possible to suppress the occurrence of cutting defects such as leaving disturbance or cutting of hollow fiber Ba in a cross section of the cut package sheet welded already hollow fiber Tabatai Bf and / or the hollow fiber bundle Bg.

Moreover, in this Embodiment, the hollow sheet bundle by which the packaging sheet was welded by the recessed strip part 324a, 324a deeper than the recessed strip part 322a, 322a in a pair of 2nd holding member 322,322 by a pair of cover member 324,324. Cutting between the pair of first holding members 321 and 321 and the pair of second holding members 322 and 322 of the packaged and welded hollow fiber bundle Bf by the rotary blade 331 while covering the outer peripheral surface of Bf. Thus, the cut hollow fiber bundle Bg can be received in the pair of cover members 324 and 324.

Moreover, in this Embodiment, the recessed strip part 321a, 321a in a pair of 1st holding members 321 and 321 has the two inclined surfaces 321b and 321b, and the recessed strip in a pair of 2nd holding member 322,322. The portions 322a and 322a have two inclined surfaces 322b and 322b, so that the package-welded hollow fiber bundle Bf is selected from a plurality of types of package-sheet welded hollow fiber bundles having different diameters. Even if it is a thing, it can be made to respond easily to the diameter of the hollow fiber bundle Bf having the welded packaging sheet, and the shape of the packaged welded hollow fiber bundle Bf is viewed from the longitudinal direction W, while maintaining the shape. It becomes possible to reliably hold the hollow fiber bundle Bf after sheet welding.

In the present embodiment, the packaging sheet S is securely fixed by heat welding by providing the welding device 340 for welding the packaging sheet S prior to cutting the package-welded hollow fiber bundle Bf. In this state, the packaged sheet welded hollow fiber bundle Bf can be cut, and thus, the cutting failure of the cut package sheet welded hollow fiber bundle Bf and / or the hollow fiber bundle Bg occurs. Can be further suppressed.

Further, in the present embodiment, a part of the linear region α extending in the longitudinal direction W at a plurality of locations (here, 4 locations) in the circumferential direction of the outer circumferential surface of the package sheet welded hollow fiber bundle Bf by the welding device 340. By welding the region α1, the packaged sheet welded hollow fiber bundle Bf can be cut in a state where the packaging sheet S is more securely fixed by heat welding, and thus the cut packaging sheet has been welded. It becomes possible to further suppress the occurrence of defective cutting at the cut surface of the hollow fiber bundle Bf and / or the hollow fiber bundle Bg.

Further, in the present embodiment, when the sensor 342 detects the end Bfa of the packaging sheet welded hollow fiber bundle Bf, the welding time of the welding device 340 to the packaging sheet S is determined as the packaging sheet welded hollow fiber bundle Bf. By making it longer than the welding time other than when the end Bfa is detected, it is possible to reliably weld the packaging sheet S at the end Bfa portion of the packaged and welded hollow fiber bundle Bf.

(Other embodiments)
By the way, when the hollow fiber bundle Bg is cut out from the packaged sheet welded hollow fiber bundle Bf with the cutting device 300, from the package sheet S at the end of the cutout side in the longitudinal direction W of the packaged sheet welded hollow fiber bundle Bf. The protruding yarn Bfb that protrudes may interfere with the cutting of the hollow fiber bundle Bg. Therefore, at least a part of the protruding yarn Bfb in the longitudinal direction W is surely cut to suppress the protruding amount of the protruding yarn Bfb, whereby the packaging sheet is welded by the cutting device 300 in the subsequent process. It is desired that the hollow fiber bundle Bg be easily cut out from the side where the protruding yarn Bfb of the finished hollow fiber bundle Bf is cut.

Therefore, in the present embodiment, prior to cutting the packaging sheet welded hollow fiber bundle Bf by the cutting device 300, the cutting sheet 300 protrudes from the packaging sheet S at the cut-out side end of the packaging sheet welded hollow fiber bundle Bf. In a state where the protruding amount of the protruding yarn Bfb is suppressed by reliably cutting at least a part of the protruding yarn Bfb in the longitudinal direction W, the protruding amount of the hollow fiber bundle Bf having the welded packaging sheet Bf is suppressed. The hollow fiber bundle Bg is preferably cut out from the side where the yarn Bfb is cut.

FIG. 8 is a schematic side view of the protruding yarn cutting device 500 in the manufacturing device 10 of the hollow fiber bundle Bg according to the present embodiment as viewed from one side in the width direction Y. FIG. 9 is a schematic perspective view showing the first holding member 521, the second holding member 522, and the cover member 524 in the protruding thread cutting device 500. FIG. 9A and FIG. 9B are schematic views showing a state where the protruding yarn Bfb of the packaged and welded hollow fiber bundle Bf is not held and a state where it is held, respectively.

The protruding yarn cutting device 500 (see FIG. 8) is a packaging sheet welded hollow fiber in which a plurality of locations in the circumferential direction of the outer circumferential surface of the packaging sheet S in the hollow fiber bundle Be with a packaging sheet (see FIG. 1) are welded. At least a part (a part in this example) in the longitudinal direction W of the protruding yarn Bfb of the bundle Bf is cut in an orthogonal direction (here, the vertical direction Z) orthogonal to the longitudinal direction W.

The protruding thread cutting device 500 according to the present embodiment includes a first holding member 521 that holds the outer periphery of the protruding thread Bfb of the packaged welded hollow fiber bundle Bf, a first holding member 521, and a longitudinal direction. The protruding yarn of the packaged sheet-welded hollow fiber bundle Bf at a position close to the direction W with a predetermined interval (specifically, an interval slightly larger than the width of the rotary blade 531 described later). The second holding member 522 that holds the outer peripheral portion of Bfb and the first holding member 521 and the second holding member 522 of the protruding thread Bfb held by the first holding member 521 and the second holding member 522 are cut. And a rotary blade 531. Specifically, the first holding member 521 holds the inner side in the longitudinal direction W of the protruding yarn Bfb. The second holding member 522 holds the outer side in the longitudinal direction W of the protruding yarn Bfb. The gap between the rotary blade 531 and the first holding member 521 and the gap between the rotary blade 531 and the second holding member 522 at the time of cutting can be about 1 mm or less or about several mm or less.

In the present embodiment, the cut-out cutting device 500 further includes a cover member 524 provided on the opposite side of the longitudinal direction W from the first holding member 521 of the second holding member 522. The cover member 524 has a concave ridge portion 524a that is deeper than a concave ridge portion 522a described later in the second holding member 522. The cover member 524 is configured to cover the outer peripheral portion of the protruding yarn Bfb with the concave strip portion 224a.

Specifically, the protruding thread cutting device 500 has been transported by the transport unit 510 that transports the packaged welded hollow fiber bundle Bf toward the cutting position downstream in the traveling direction W1, and the transport unit 510. A holding part 520 for holding the protruding thread Bfb of the packaged fiber welded hollow fiber bundle Bf, and a cutting part 530 for cutting a part of the protruding thread Bfb held in the holding part 520 in the longitudinal direction W. The control unit 400 controls the operation of the conveyance unit 510, the holding unit 520, and the cutting unit 530. Note that the protruding yarn cutting device 500 may include a control unit that controls the entire protruding yarn cutting device 500.

The transport unit 510 includes a transport mechanism 510a including a transport member 512 that transports the packaged and welded hollow fiber bundle Bf in the longitudinal direction W.

The transport mechanism 510 a includes a transport member 512 and a transport actuator 511.

The conveying member 512 is a pair of conveying rollers 512 and 512 that hold the packaged sheet-welded hollow fiber bundle Bf from opposite sides in the orthogonal direction (here, the vertical direction Z) orthogonal to the longitudinal direction W. The pair of transport rollers 512 and 512 is configured to be rotationally driven around an axis along the width direction Y. Here, a pair of disc-shaped guide members 512a and 512a having a diameter larger than the diameter of the transport rollers 512 and 512 are provided at both ends in the axial direction of the pair of transport rollers 512 and 512. The distance between the pair of guide members 512a and 512a is about the diameter of the packaged welded hollow fiber bundle Bf.

The transport actuator 511 includes a rotation drive unit 511a that rotationally drives the pair of transport rollers 512 and 512.

The holding unit 520 includes a first holding mechanism 520a including a first holding member 521 that holds the protruding thread Bfb, and a second holding mechanism 520b including a second holding member 522 that holds the protruding thread Bfb. ing.

In the protruding yarn cutting device 500, the control unit 400 is a state in which the holding operation of the first and second holding mechanisms 520a and 520b with respect to the protruding yarn Bfb is released, and the package sheet is welded hollow by the conveying mechanism 510a. The yarn bundle Bf is protruded from the initial position in the advancing direction W1, and the yarn Bfb is transported by a predetermined distance beyond the holding portion 520 and stopped. In addition, the control unit 400 performs the holding operation of the second holding member 522 by the second holding mechanism 520b, and then moves the package sheet welded hollow fiber bundle Bf in the direction W2 opposite to the traveling direction W1 by the transport mechanism 510a. The protruding yarn Bfb is moved backward by a predetermined distance, the protruding yarn Bfb is positioned on the holding portion 520, and the protruding yarn Bfb is held by the second holding member 522. Further, the control unit 400 performs the holding operation of the first holding member 521 by the first holding mechanism 520a to hold the protruding thread Bfb by the first holding member 521, and then the first and second holding members 521, The cutting portion 530 cuts between the first and second holding members 521 and 522 of the protruding yarn Bfb held at 522. Then, the control unit 400 releases the holding operation of the first and second holding members 521 and 522 by the first and second holding mechanisms 520a and 520b, and the package sheet welded hollow fiber bundle Bf is transferred by the transport mechanism 510a. It is configured to further retract in the direction W2 opposite to the traveling direction W1.

The first holding mechanism 520a includes a first holding member 521 and a first holding actuator 525.

The first holding member 521 (see FIG. 9) is a pair of first holding members 521 and 521 that hold the protruding yarn Bfb from opposite sides in the orthogonal direction (here, the vertical direction Z) orthogonal to the longitudinal direction W. It is said that.

Specifically, the pair of first holding members 521 and 521 are concave stripes formed along the longitudinal direction W (extending in the longitudinal direction W) on opposite sides (specifically, facing surfaces 521c and 521c). Recesses 521a and 521a are provided, respectively. The concave strips 521a and 521a have arcuate curved surfaces 521b and 521b in which a predetermined radius (for example, the same radius as that of the packaged and welded hollow fiber bundle Bf) is constant in the longitudinal direction W, respectively. It is said that. Each of the pair of first holding members 521 and 521 has the same shape. Specifically, each of the pair of first holding members 521 and 521 is made of a resin material.

The first holding mechanism 520a includes a pair of first holding members 521 and 521, and opposed portions (specifically, opposed surfaces 521c and 521c) in which the concave strip portions 521a and 521a are formed close to or in contact with each other (in the illustrated example). By being arranged so as to be close to each other, it is eaten by a substantially columnar or columnar shape (substantially columnar shape in which the front and rear portions are opened in the illustrated example) formed by the concave portions 521a and 521a facing each other. The take-out yarn Bfb is held.

The first holding actuator 525 (see FIG. 8) includes a pair of movement driving units 525a and 525a that reciprocate the pair of first holding members 521 and 521 in an orthogonal direction (here, the vertical direction Z) orthogonal to the longitudinal direction. Contains.

In the protruding thread cutting device 500, when performing the holding operation of the pair of first holding members 521, 521, the control unit 400 operates the first holding actuator 525 so that one of the first holding members 521 and the other is held. The first holding member 521 is moved in a direction in which the first holding member 521 approaches the vertical direction Z. On the other hand, when performing the holding release operation of the pair of first holding members 521 and 521, the control unit 400 operates the first holding actuator 525 and one first holding member 521 and the other first holding member 521. Are moved in a direction in which they are separated from each other in the vertical direction Z.

The second holding mechanism 520b includes a second holding member 522 and a second holding actuator 526.

The second holding member 522 (see FIG. 9) has a pair of second holding members 522 and 522 that hold the protruding yarn Bfb from opposite sides in the orthogonal direction (here, the width direction Y) orthogonal to the longitudinal direction W. It is said that. The cover member 524 is a pair of cover members 524 and 524 provided on the pair of second holding members 522 and 522, respectively.

Specifically, the pair of second holding members 522 and 522 are concave stripes formed along the longitudinal direction W (extending in the longitudinal direction W) on opposite sides (specifically, facing surfaces 522c and 522c). Recesses 522a and 522a are provided, respectively. The concave strips 522a and 522a have arcuate curved surfaces 522b and 522b in which a predetermined radius (for example, the same radius as that of the packaged welded hollow fiber bundle Bf) is constant in the longitudinal direction W, respectively. It is said that. Each of the pair of second holding members 522 and 522 has the same shape. Specifically, the pair of second holding members 522 and 522 are made of a resin material.

Note that the arcuate curved surfaces 521b and 521b of the pair of first holding members 521 and 521 and the arcuate curved surfaces 522b and 522b of the pair of second holding members 522 and 522 all have the same radius.

In the present embodiment, the pair of cover members 524 and 524 are formed along the longitudinal direction W (extends in the longitudinal direction W) on the sides facing each other (specifically, the facing surfaces 524c and 524c). Each of the concave strips 524a and 524a has a predetermined diameter (for example, the same diameter as that of the packaged welded hollow fiber bundle Bf) at the inner end in the longitudinal direction W (upstream end in the traveling direction W1). In addition, the shape has arcuate curved surfaces 524b and 524b that gradually increase toward the outside in the longitudinal direction W (downstream in the traveling direction W1). The arcuate curved surfaces 524b and 524b are continuous with the outer ends (downstream ends in the traveling direction W1) of the arcuate curved surfaces 522b and 522b in the second holding members 522 and 522. Each of the pair of cover members 524 and 524 has the same shape. Specifically, each of the pair of second holding members 522 and 322 and the pair of cover members 524 and 524 is made of a resin material. Here, one second holding member 522 and one cover member 524 are integrally formed, and the other second holding member 522 and the other cover member 524 are integrally formed.

The second holding mechanism 520b has a pair of second holding members 522 and 522 in close proximity to or in contact with each other (specifically, the opposing surfaces 522c and 522c) where the concave strips 522a and 522a are formed (in the illustrated example). By being arranged so as to be close to each other, it protrudes by a substantially columnar or columnar space (in the illustrated example, a substantially columnar shape in which the upper and lower portions are opened) formed by the concave strips 522a and 522a facing each other. The yarn Bfb is held.

Note that the radius of the inner end in the longitudinal direction W of the arcuate curved surfaces 524b and 524b in the pair of cover members 524 and 524 is the same as the radius of the arcuate curved surfaces 522b and 522b in the pair of second holding members 522 and 522. Yes.

Further, the second holding mechanism 520b is configured such that the pair of cover members 524 and 5224 are close to or in contact with each other (specifically, the facing surfaces 524c and 524c) where the concave portions 524a and 524a are formed (in the illustrated example). By arranging them so as to be close to each other, the protruding thread Bfb is formed by a substantially conical space (substantially conical shape in which the upper and lower portions are opened in the illustrated example) formed by the concave portions 524a and 524a facing each other. It is configured to hold.

The second holding actuator 526 (see FIG. 8) includes a pair of movement driving units 526a and 526a that reciprocate the pair of second holding members 522 and 522 in the orthogonal direction (here, the width direction Y) orthogonal to the longitudinal direction. Contains.

In the cutting device 300 according to the present embodiment, the control unit 400 operates the second holding actuator 526 to operate one of the second holding members 522 when performing the holding operation of the pair of second holding members 522 and 522. And the other second holding member 522 are configured to move in a direction in which the width direction Y approaches each other. On the other hand, when performing the holding release operation of the pair of second holding members 522 and 522, the control unit 400 operates the second holding actuator 526 and one second holding member 522 and the other second holding member 522. Are moved in the direction of separating from each other in the width direction Y.

The cutting unit 530 includes a rotary blade 531, a rotary drive unit 532 that rotationally drives the rotary blade 531, and a rotary blade moving mechanism that reciprocates the rotary drive unit 532 in a direction perpendicular to the longitudinal direction W (here, the vertical direction Z). 533.

Specifically, the control unit 400 holds the protruding yarn Bfb of the packaged and welded hollow fiber bundle Bf by the first and second holding mechanisms 520a and 520b, and the rotary driving unit 532 holds the rotary blade 531. While rotating, the rotary blade 531 is reciprocated in the up and down direction Z by the rotary blade moving mechanism 533 to cut the protruding yarn Bfb.

The rotary blade 531 has a blade edge 531a provided on the outer peripheral portion, and has a disk shape (specifically, a disk shape made of metal) in which the thickness of the blade edge 531a decreases as it goes outward in the radial direction. It is considered as a rotary blade. That is, the rotary blade 531 is configured by an orthogonal surface 531b along an orthogonal direction orthogonal to the longitudinal direction W and an inclined surface 531c inclined in the longitudinal direction W with respect to the orthogonal surface 531b. Is formed. The rotary blade 531 is disposed in a direction in which the orthogonal surface 531b faces the pair of first holding members 521 and 521 and the inclined surface 531c faces the pair of second holding members 522 and 522. The angle formed by the orthogonal surface 531b and the inclined surface 531c is a predetermined angle.

The rotation drive unit 532 rotates the rotary blade 531 around the rotation axis. The rotary blade moving mechanism 533 includes an accommodation actuator 533a including a movement drive unit 533b that reciprocates the rotation drive unit 532 in the vertical direction Z.

In the cut-out yarn cutting device 500 having such a configuration, in cutting the cut-out yarn Bfa of the packaged welded hollow fiber bundle Bf, first, the first and second holding mechanisms 520a and 520b are protruded. With the holding operation to the yarn Bfb released, the packaged sheet-welded hollow fiber bundle Bf positioned at the initial position is squeezed out in the advancing direction W1 by the transport mechanism 510a so that the yarn Bfb passes the holding portion 520 and is a predetermined distance. Transport and stop.

Next, after the holding operation of the pair of second holding members 522 and 522 is performed by the second holding mechanism 520b, the package sheet welded hollow fiber bundle Bf is set in the direction W2 opposite to the traveling direction W1 by the transport mechanism 510a. The protrusion yarn Bfb is moved backward by a distance, and the protrusion yarn Bfb is positioned on the holding portion 520 and the protrusion yarn Bfb is held by the pair of second holding members 522 and 522.

Next, the pair of first holding members 521 and 521 are held by the first holding mechanism 520a to hold the protruding yarn Bfb by the pair of first holding members 521 and 521. At this time, the downstream length of the protruding yarn Bfa in the traveling direction W1 with respect to the cutting position by the cutting blade 531 is set as the cutting length of the protruding yarn Bfa.

Next, the rotary blade 521 that is rotationally driven by the rotary drive unit 532 is moved to one side in the vertical direction Z by the rotary blade moving mechanism 533, and the pair of first holding members 521 and 521 and the pair of second holding members 522. The pair of first holding members 521 and 521 and the pair of second holding members 522 and 522 of the protruding yarn Bfb held at 522 are cut.

Next, the holding operation of the pair of first holding members 521 and 521 and the pair of second holding members 522 and 522 is released by the first and second holding mechanisms 520a and 520b, and the packaging sheet welded hollow fiber is released by the transport mechanism 510a. The bundle Bf is further retracted in the direction W2 opposite to the traveling direction W1 to return to the initial position.

And the manufacturing apparatus 10 transfers to the cutting process of the hollow fiber bundle body Bf by which the packaging sheet welded by the cutting device 300 was carried out.

According to the protruding yarn cutting device 500 described above, it is possible to reliably cut at least a part (part in this example) of the protruding yarn Bfb to suppress the amount of protrusion of the protruding yarn Bfb. Thus, the hollow fiber bundle Bg can be easily cut out from the side where the protruding yarn Bfb of the packaged and welded hollow fiber bundle Bf is cut by the cutting device 300 in the subsequent process.

In the protruding yarn cutting device 500, when the control unit 400 holds the protruding yarn Bfb, the first holding actuator 525 applies the pair of first holding members 521 and 521 to the protruding yarn Bfb. The predetermined pressing force set in advance is set larger than the predetermined pressing force applied to the protruding thread Bfb of the pair of second holding members 522 and 522 by the second holding actuator 526. Therefore, when holding the protruding yarn Bfb, the first holding pressure P3 [Pa] for holding the protruding yarn Bfb by the pair of first holding members 521 and 521 is set by the pair of second holding members 522 and 522. It is larger than the second holding pressure P4 [Pa] for holding the protruding yarn Bfb (P3> P4).

The second holding pressure P4 may be about 1/2 or less of the first holding pressure P3 [(P3) / 2 <P4], more preferably about 1/4 or less [(P3) / 4 <P4].

Furthermore, when holding the protruding yarn Bfb, the first holding area S3 [m ² ] where the pair of first holding members 521 and 521 contact the protruding yarn Bfb is equal to the pair of second holding members 522. 522 is larger than the second holding area S4 [m ² ] in contact with the protruding yarn Bfb (S3> S4). Here, the pair of first holding members 521 and 521 and the pair of second holding members 522 and 522 hold the protruding thread Bfb over the entire longitudinal direction W, and the pair of first holding members 521 and 521 A predetermined length (holding length) L4 (see FIG. 9) in the longitudinal direction W is a predetermined length (holding length) in the longitudinal direction W of the pair of second holding members 522 and 522. It is longer than L5 (see FIG. 9). The pair of first holding members 521 and 521 with respect to the protruding yarn Bfb holds the protruding yarn Bfb (width in the circumferential direction). The pair of second holding members 522 and 522 has the protruding yarn. It is equal to the holding width (circumferential width) for holding Bfb.

The second holding area S4 may be about 1/2 or less of the first holding area S3 [(S3) / 2 ≧ S4], more preferably about 1/4 or less [(S3) / 4 ≧ S4].

By doing so, it becomes possible to suppress the occurrence of cutting defects such as disturbance of the hollow fiber Ba and uncut residue on the cut surface of the cut out protruding yarn Bfb.

Further, the cutting device 300 includes a protruding yarn cutting device 500, and before the process of cutting the package sheet welded hollow fiber bundle Bf (when the welding device 340 is provided, before the welding process by the welding device 340). ), The protruding yarn cutting device 500 may cut the protruding yarn Bfb.

DESCRIPTION OF SYMBOLS 10 Manufacturing apparatus 100 Converging apparatus 200 Packaging apparatus 300 Cutting apparatus 310 Conveying part 311 3rd holding actuator 320 Holding parts 321 and 321 A pair of 1st holding members (an example of a 1st holding member)
321a Concave portion 321b Inclined surface 321c Bottom surface 322, 322 A pair of second holding members (an example of a second holding member)
322a Concave portion 322b Inclined surface 322c Bottom surface 324, 324 A pair of cover members (an example of a cover member)
325 First holding actuator 326 Second holding actuator 330 Cutting unit 331 Rotating blade 332 Rotating drive unit 333 Rotating blade moving mechanism 340 Welding device 341 Welding unit 342 Sensor 400 Control unit 500 Extruding yarn cutting device 510 Conveying unit 511 Third holding Actuator 520 Holding portion 521, 521 A pair of first holding members (an example of a first holding member)
521a Concave portion 521b Arc curved surface 522, 522 A pair of second holding members (an example of a second holding member)
522a Concave strip 522b Arc curved surfaces 524, 524 A pair of cover members (an example of a cover member)
525 First holding actuator 526 Second holding actuator 530 Cutting unit 531 Rotating blade 532 Rotation driving unit 533 Rotating blade moving mechanism Ba Hollow fiber (an example of yarn)
Bf packaging sheet welded hollow fiber bundle (an example of packaging sheet welded yarn bundle)
Bfa upstream end (termination)
Bfb protruding thread (an example of a thread bundle)
Bg hollow fiber bundle (an example of a yarn bundle)
S Packaging sheet W Longitudinal direction Y Width direction Z Vertical direction α Linear region α1 Partial region

Claims (8)

1. A yarn bundle cutting device that cuts a bundle of bundles of a plurality of yarns in a direction orthogonal to the longitudinal direction,
   A first holding member for holding the outer periphery of the yarn bundle,
   A second holding member that holds an outer peripheral portion of the yarn bundle body at a position close to the first holding member at an interval in the longitudinal direction;
   A rotary blade for cutting between the first holding member and the second holding member of the bundle of yarns held by the first holding member and the second holding member,
   In holding the yarn bundle body, a first holding pressure for holding the yarn bundle body by the first holding member is made larger than a second holding pressure for holding the yarn bundle body by the second holding member, The first holding area for holding the yarn bundle body by the first holding member is configured to be larger than the second holding area for holding the yarn bundle body by the second holding member. The yarn bundle cutting device.
2. The yarn bundle cutting device according to claim 1,
   Each of the first holding member and the second holding member has a concave ridge portion along the longitudinal direction in a portion that holds the yarn bundle body. Cutting device.
3. The yarn bundle cutting device according to claim 2,
   A cover member provided on the opposite side of the longitudinal direction from the first holding member of the second holding member and having a groove portion deeper than the groove portion in the second holding member; A yarn bundle body cutting device, wherein the outer circumferential portion of the yarn bundle body is covered by the concave portion of the cover member.
4. The yarn bundle cutting device according to claim 2 or 3,
   The first holding member and the second holding member are respectively a pair of first holding members and a pair of second holding members that hold the yarn bundle body from opposite sides in the orthogonal direction.
   The concave portions of the pair of first holding members and the pair of second holding members gradually become smaller as the distance in the direction orthogonal to both the longitudinal direction and the orthogonal direction goes to the bottom along the orthogonal direction. A yarn bundle cutting device having two inclined surfaces.
5. A yarn bundle cutting device according to any one of claims 1 to 4, wherein
   The yarn bundle body is a package sheet welded yarn bundle body in which a packaging sheet is wound and welded,
   A yarn bundle cutting device, further comprising a welding device for welding the packaging sheet prior to cutting the package sheet welded yarn bundle.
6. The yarn bundle cutting device according to claim 5,
   The welding apparatus welds at least a part of a linear region along the longitudinal direction at a plurality of locations in the circumferential direction of the outer peripheral portion of the package sheet welded yarn bundle. Cutting device.
7. The yarn bundle cutting device according to claim 5 or 6,
   A transport section for transporting the yarn bundle in the traveling direction on one side of the longitudinal direction;
   A sensor for detecting an upstream end of the yarn bundle body in the traveling direction;
   It is configured to sequentially cut with the rotary blade while conveying the yarn bundle body in the traveling direction in the conveying unit,
   When the upstream end of the yarn bundle body is detected by the sensor, the welding time to the packaging sheet by the welding device is longer than the welding time other than when the upstream end of the yarn bundle body is detected. A yarn bundle cutting device.
8. A bundling device for bundling a plurality of yarns into a yarn bundle, a packaging device for winding the packaging sheet around the yarn bundle, and welding the packaging sheet in the yarn bundle around which the packaging sheet is wound; The yarn bundle body cutting device according to any one of claims 1 to 7, wherein the yarn bundle body to which the packaging sheet is welded is cut into a hollow fiber bundle having a predetermined length. A hollow fiber bundle production apparatus for producing a hollow fiber bundle for a hollow fiber type blood treatment apparatus using a hollow fiber as the yarn.

Images