JPH02164357A - Method and device for producing cylindrical fiber body - Google Patents

Abstract

PURPOSE:To prevent dislocation and twisting of cylindrical fiber body at the time of injection, ununiformity in the dia., and speckling in the fiber density by rotating the cylindrical fiber set on an arbor while it is supported by a support in the condition that the support width is in at least linear contact over the fluid injection width of a nozzle. CONSTITUTION:A cylindrically formed fiber body 5 is set on an arbor 6, and they are placed between supports 10a, 10b. Therein the cylindrical fiber body 5 is supported by supports 10a, 10b in the condition in linear contact over the longitudinal of the cylindrical fiber body 5. Then the supports 10a, 10b are rotated to allow the cylindrical fiber body to make following rotation together with the arbor. High pressure fluid L is injected to this cylindrical fiber body 5 from a nozzle 8 in the condition that it is in following rotation with its longitu dinal direction supported by the supports, and an injecting means 7 is traversed while vibrating in the longitudinal direction of the cylindrical fiber, so that confounding from this injecting means 7 is applied uniformly to the periphery of the cylindrical fiber and in its longitudinal direction.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a method for improving anti-tangle properties by subjecting a cylindrical fibrous body, for example, a cylindrical fibrous body formed into a tube shape such as an artificial blood vessel, to a fluid treatment. , relates to a method and apparatus for manufacturing a cylindrical fibrous body with excellent anastomotic properties.

[Prior Art] A cylindrical artificial blood vessel made of, for example, synthetic fibers is cut by a doctor's scalpel during a surgical operation, and anastomosed with a patient's blood vessel using sutures. At this time, if the fibers at the cut end become frayed, the anastomosis with the patient's blood vessel will not be successful, and if the anastomosis frays after the anastomosis, this site will bleed and become useless as an artificial blood vessel. is required to have resistance to fraying and anastomosis.

Conventionally, as a method for manufacturing a cylindrical fibrous body for such a purpose, the method disclosed in Japanese Patent Application Laid-Open No. 61-92666 is known.

In this conventional method, a cylindrical fibrous body is constructed from fluff, loop fibers, etc., a shield is inserted inside the fibrous body, and high-pressure fluid is injected from the outside to perform the entangling process. Although this achieves the purpose of the entanglement treatment, the force of the high-pressure fluid water flow causes the cylindrical fiber body to partially shift from the shielding object, streaks due to entanglement spots near the injection part, and irregularities in the outer diameter. There were problems and the quality was very poor.

Therefore, in order to solve this problem, the present applicant proposed a further improved method for manufacturing an artificial blood vessel in Japanese Patent Application No. 289033/1983.

This conventional manufacturing method will be explained using FIG. 6, which is a schematic front view of the manufacturing apparatus, and FIG. 7, which is a sectional view taken along the line C-C. A rod-shaped mandrel 2 is inserted inside, this mandrel 2 is rotated by a motor 3 together with the cylindrical fibrous body 1, and the mandrel 2, into which the cylindrical fibrous body 1 has been inserted, is rotated between the cylindrical fibrous body and the nozzle 4. By injecting a high-pressure fluid onto the cylindrical fibrous body while relatively advancing it in the longitudinal direction or the cross direction, a plurality of single fibers constituting the cylindrical fibrous body are intertwined with each other, and the resistance is increased. It improves tangle and anastomotic properties.

However, even with this manufacturing method, problems such as the cylindrical fibrous body being partially twisted due to the force of the jetted fluid stream, and the jetted fluid collecting in the center of the cylindrical fibrous body causing bulges and uneven outer diameters. Ta.

In this way, if a bulge occurs in the center of the cylindrical fibrous body and the outer diameter becomes uneven, this will lead to density unevenness in the single fibers that make up the cylindrical fibrous body. This is a fatal problem for artificial blood vessels because it causes bleeding from the area.

[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned problems, and the cylindrical fiber body after fluid treatment has twists, bulges, irregularities in outer diameter,
It is an object of the present invention to provide a method and apparatus for manufacturing a cylindrical fibrous body that is free from uneven fiber density, that is, has excellent resistance to fraying and anastomotic properties.

[Means for Solving the Problems] The structure of the method for manufacturing a cylindrical fibrous body of the present invention, which meets the above-mentioned object, includes inserting a mandrel inside the cylindrical fibrous body and rotating the cylindrical fibrous body, while rotating the cylindrical fibrous body. A method for producing a cylindrical fibrous body in which a fluid is injected toward the cylindrical fibrous body from a nozzle provided on the outside of the cylindrical fibrous body, and the cylindrical fibrous body is subjected to fluid treatment. The cylindrical fibrous body is gripped by a support provided on the outside of the cylindrical fibrous body and the mandrel; The method for manufacturing a cylindrical fibrous body is characterized in that the surface of the support of the gripped portion and the surface of the mandrel are moved in the same direction.

Further, the structure of the apparatus for manufacturing a cylindrical fibrous body of the present invention for carrying out the above method for manufacturing a cylindrical fibrous body includes a mandrel for rotatably holding the cylindrical fibrous body, and a drive for rotating the mandrel. means and a nozzle provided near the mandrel;
In an apparatus for manufacturing a cylindrical fiber cone body that performs fluid treatment on the cylindrical fibrous body with fluid jetted from the nozzle, the apparatus includes a support that is paired with the mandrel and grips the cylindrical fibrous body. and the drive means is a drive means that rotates one of the support and the mandrel to rotate the other in a driven manner, or a drive means that rotates both the support and the mandrel. This is an apparatus for manufacturing a cylindrical fibrous body.

First, the apparatus for manufacturing a cylindrical fibrous body of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a schematic front view showing one embodiment of the apparatus for manufacturing a cylindrical fibrous body according to the present invention, and FIG. 2 is a sectional view taken along the line A--A in FIG. 1.

In the figure, numeral 5 denotes a cylindrical fibrous body such as an artificial blood vessel that is to be subjected to fluid treatment, and numeral 6 denotes a round rod-shaped mandrel inserted into the cylindrical fibrous body. Reference numeral 7 denotes an injection means for subjecting the cylindrical fibrous body 5 inserted in the mandrel 6 to an entangling treatment by injecting high-pressure fluid (water) L from above. a nozzle 8 that sprays water;
A flexible supply pipe 9 that supplies high-pressure water to this nozzle 8
and a high-pressure water supply device (not shown). The nozzle width of the nozzle 8 is shorter than the length of the cylindrical fibrous body 5, and a plurality of nozzle holes (not shown) are provided in a row in the nozzle width direction. Further, the spraying means 7 is configured to be able to spray high-pressure water onto the cylindrical fibrous body 1 by a device not shown, while traversing in the longitudinal direction of the mandrel 2 (in the direction of the arrow in the figure).

10a and 10b are roller-shaped supports that support the cylindrical fibrous body 5 inserted into the mandrel 6 from below while being in line contact over its entire length in the longitudinal direction; are installed in parallel.

Both ends of the supports 10a and 10b are supported by bearings 11, and the support 10a is supported by a belt 13 by a motor 12.
The support body 10b is driven by a belt 14 that is placed over the support body 10a. Therefore,
These motors 12, belts 13, 14, etc.
0a and 10b, while the support 10a
, 10b, the cylindrical fibrous body 5 placed on the mandrel 6 is pressed toward the support by the weight of the mandrel 6 and the jetting force of the jetting fluid, and is driven to rotate integrally with the mandrel 6.

Here, in this invention, the cylindrical fibrous body 5 to be subjected to fluid treatment may be made of any fabric such as woven fabric, knitted fabric, braided fabric, non-woven fabric, etc., and the type of the structure is not particularly limited and can be selected arbitrarily. I can process what I have done. In particular, as a fiber to further exhibit the effect of the present invention as an artificial blood vessel, as shown in Japanese Patent Application Laid-Open No. 61-92666, a cylindrical fiber body is constructed using polyester fiber, and a portion of the fiber body is It is preferable that the fibers are ultrafine fibers having a single filament fineness of 1.0 denier or less to form a napped fabric in which napped fibers are napped on the surface. When high-pressure water is injected onto the cylindrical fibrous body constructed in this way, the entangling effect in the three-dimensional direction is further enhanced, making it possible to obtain a highly flexible artificial blood vessel with excellent resistance to fraying and anastomosis. Because you can.

The material of the mandrel 6 to be inserted into the cylindrical fiber body 5 can be made of stainless steel, plastic, iron, ceramic, rubber, etc. is more preferable. Further, the cross-sectional shape of the mandrel 5 is not particularly limited, but it is preferable to use a cylindrical or cylindrical shape. The outer diameter of the mandrel may be close to the inner diameter of the cylindrical fibrous body, but it is preferably equal to or greater than the inner diameter, and the cylindrical fibrous body is brought into close contact with the mandrel.

The shape of the supports 10a, 10b is not particularly limited, but is preferably cylindrical or cylindrical. In addition, the length of the support, that is, the support range, must support at least the range treated by the jet of the jet fluid from the nozzle 8 during jetting, in order to prevent fraying or twisting of the cylindrical fiber body. However, in consideration of ease of fluid treatment, it is more preferable to have a length equal to or longer than the length of the cylindrical fibrous body. In addition, when a liquid is used as the fluid, the fluid may remain between the support and the mandrel depending on the structure of the support and its position. It is preferable to use a means for actively draining the sprayed water, such as using a water-permeable material such as a perforated steel plate, or providing a drainage groove on the outer periphery or longitudinal direction of the support. Also, regarding the above-mentioned mandrel 6, since the water jetted from the nozzle may stay between the cylindrical fibrous body and the mandrel after penetrating the cylindrical fibrous body, the mandrel 6 may be used in the same manner as the above-mentioned support. It is preferable to take water permeability and drainage into consideration.

The way in which the cylindrical fibrous body 5 inserted into the mandrel 6 is supported by the support 10 is such that at least line contact is made along the longitudinal direction of the cylindrical fibrous body 5 in order to prevent the cylindrical fibrous body from fraying or twisting. It is necessary to support the cylindrical fibrous body in this state, that is, the support body and the mandrel must grip the cylindrical fibrous body as one body. Note that if the line of contact between the cylindrical fibrous body and the mandrel is interrupted to such an extent that the treatment effect of the fluid is not impaired, it is included in the line contact here. In FIG. 2, the tubular fibrous body 5 has a mandrel 6 and a support
0a and 10b has been shown, but support may be provided at one point or three points by increasing or decreasing the number of supports. Furthermore, in the figure, the cylindrical fibrous body 5 with the mandrel 6 inserted therein is supported in such a manner that the cylindrical fibrous body 5 and the supports 10a, 10b are in line contact along the longitudinal direction of the mandrel 6. Instead of such a line contact mode, the cylindrical fibrous body may be gripped in a surface contact mode and supported.

As a specific means for supporting the cylindrical fibrous body into which the mandrel is inserted in surface contact, for example, the method shown in FIG. 3 can be mentioned.

The support mode shown in FIG. 3 has three roll-shaped supports 10.
c to 10e are arranged along the rotational direction of the mandrel 6, and an endless belt 16 is wound around this.
A mandrel 6 with a cylindrical fibrous body 5 inserted between the endless belt 16 and the supporting body 10d is supported in a bent state so that the endless belt 16 forms a “<” shape, and the supporting body 10c is driven. As a result, the lower surface of the cylindrical fibrous body 5 is rotated while being in contact with the endless belt 16 at a constant contact length. Incidentally, both the support body and the mandrel may be rotated by a driving means.

With this configuration, the cylindrical fibrous body 5 inserted into the mandrel 6 rotates while being in surface contact with the endless belt 16, so that the mandrel 6 can rotate stably and the cylindrical fibrous body 5 It is possible to obtain a product of excellent quality without deviation from the mandrel 6 or twisting. In this embodiment, the length of surface contact between the cylindrical fibrous body 5 and the endless belt 16 is preferably 1/2 or less of the circumferential length of the cylindrical fibrous body 5. This is because if the contact length exceeds 1/2, not only will the drainage of the jetted fluid become poor and the entangling effect will be reduced, but also the above-mentioned cylindrical fibrous body will be twisted, which is undesirable. Therefore, the endless belt 16 is preferably made of a water-permeable member such as a wire mesh or cloth.

In FIGS. 1 to 3, a support 10a is used as a rotation means for rotating either the mandrel 6 or the support 10 to rotate the other in a driven manner.

10b and the endless belt 16, the mandrel into which the cylindrical fibrous body was inserted was driven to rotate.
The opposite embodiment can be obtained, for example, by the embodiments shown in FIGS. 4 and 5.

FIG. 4 is a schematic front view showing a mode in which the shaft 6 is driven and the support body 10f is driven to rotate, and FIG. 5 is a line BB in FIG. 4.
FIG.

In the figure, the mandrel 6 is chucked by chucks 17a and 17b supported by bearings 11 at both ends thereof. Here, since the chuck 17b is directly connected to the motor 12, the mandrel 5 can be rotated, and the chuck 17a is connected to the bearing 11 in the longitudinal direction of the mandrel 6.
Since the inside is slidable, by sliding the chuck 17a to the right in the figure against the pressing force of the spring 18, the mandrel 6 and the cylindrical fibrous body 5 can be easily attached and detached from the chuck 17b. .

The mandrel 6 into which the cylindrical fibrous body 5 supported in this way is inserted
On the other hand, a roll-shaped support 10f contacts the cylindrical fibrous body from below in a crossover manner in the longitudinal direction, and both ends are constantly pressed with a constant pressing force by a spring 20 via a pair of bearings 19. held and held.

In such an embodiment, both ends of the mandrel are chucked with chucks 17a,
Since chucking is performed reliably at 17b, the mandrel can be supported more firmly and rotated more stably than in the support mode shown in FIGS. 1 to 3.

A spring may be used as a means of contact between the mandrel and the support, but in order to prevent the cylindrical fibrous body from twisting against the mandrel and causing irregularities in outer diameter, a fluid cylinder or the like may be used to press it more firmly. It is more preferable to do so.

From the viewpoint of preventing such twisting, in any of the above-mentioned embodiments, uneven or protruding grooves such as knurling or splines are provided on the surface of the support body to prevent slipping between the cylindrical fibrous body and the mandrel. It is preferable to apply a lattice-like material such as a wire mesh, or to cover it with rubber. When covering rubber, the rubber material is natural rubber,
Silicone rubber, polyurethane rubber, polyvinyl chloride rubber, etc. are preferred.

The hole diameter of the nozzle 8 is 0.0 when water is used as the fluid.
05-1.0+nm is preferable, more preferably 0.1
~0.5mm. Further, the pitch of the nozzle holes is preferably 0.5 to 5 mm from the viewpoint of jetting effect and durability of the nozzle holes. Further, the distance between the nozzle 8 and the cylindrical fiber body 5 is preferably 10 to 70 mm. If this distance is too large, the columnar flow will turn into a spray flow and the entangling effect will be poor, which is not preferable.

Next, the method for manufacturing the cylindrical fibrous body of the present invention will be specifically explained using FIG. 1 and FIG. 2 again.

First, a cylindrical fibrous body 5 is inserted into the mandrel 6,
This is placed between the support 10a and the support 10b.

In this case, the cylindrical fibrous body 5 and the supports 10a, 10b are
The cylindrical fibrous body 5 is supported in a state of contact with the crossover wire in the longitudinal direction. Next, by pressing a switch (not shown) on the motor 12 and rotating the supports 10a and 10b, the cylindrical fibrous body is driven to rotate together with the mandrel in the direction of the arrow in the figure. Next, the switch of the traverse device of the nozzle 8 (not shown) is pressed to cause the nozzle 8 to traverse in the longitudinal direction of the cylindrical fiber sheet. When the traverse speed becomes uniform, press the switch of the pressurized water production device (not shown), supply high pressure water from the pressurized water production device to the nozzle 8 via the supply pipe 9, and spray high pressure water jet against the cylindrical fiber body 5. Inject.

When such an operation is applied, the cylindrical fibrous body 5 is supported in the longitudinal direction by the support body and is driven to rotate, and a high-pressure fluid stream is injected from the nozzle 8. Since it is traversed while vibrating in the longitudinal direction of the cylindrical fibrous body, the outer circumferential surface of the cylindrical fibrous body and its longitudinal direction can be uniformly subjected to the entangling treatment from the spraying means 7.

Here, water is used as the fluid injected onto the cylindrical fibrous body in this embodiment, but depending on the cylindrical fibrous body, other gases such as air, steam, hot water, liquids such as chemical solutions may be used. good. For the production of artificial blood vessels, it is preferable to use water that is easily obtained and has a high entangling effect.

If the rotation speed of the mandrel into which the cylindrical fibrous body is inserted is too fast, the entangling effect due to high-pressure fluid treatment will not be sufficient.
If it is too slow, the fibers will be cut or damaged, so the circumferential speed should be 0.
．． It is preferable to set it as the range of 1-10 m/min.

When water is used as the fluid, the pressure of the high-pressure fluid should be 5 to 200 kg from the economic point of view of entanglement effect and required power.
/ad is preferred, and 10 to 100 kg/c is more preferred. This is because if the injection pressure is too low, a sufficient entangling effect cannot be obtained, whereas if the pressure is too high, the fibers will be cut.

Further, the shape of the fluid is preferably a thin linear columnar flow or a spray flow, but a columnar flow is more preferable in order to enhance the entangling effect by jetting. Spray flow is inferior in terms of entangling effect, but when used in combination with columnar flow as appropriate, uniform entanglement results in a smooth surface finish, so it is useful for solidifying the foundation for entanglement and for surface finishing. Can be used.

As for the traverse method of the injection means 7, in this embodiment, the injection means 7 is traversed with respect to the cylindrical fibrous body 5, but if the nozzle width is equal to or larger than the length of the cylindrical fibrous body, the injection means 7 can of course It may be stationary. However, the nozzle width cannot generally be made long from the viewpoint of economy, so in order to make the entanglement of the cylindrical linear body uniform over its longitudinal direction, the nozzle 8 is formed into a cylindrical shape as shown in FIG. It is more preferable to traverse the fibrous body 5 or to traverse the mandrel 6 into which the cylindrical fibrous body 5 is inserted.

This traverse speed is preferably 0.1 to 10 m/min. Further, instead of traversing all the time, a sliding movement method may be used in which the fluid is stopped at - and then traversed again to perform fluid treatment. Furthermore, in order to enhance the entangling effect of the cylindrical fibrous body, the cylindrical fibrous body into which the mandrel is inserted or the injection means 7 is used.
Either one of them causes minute vibrations in the longitudinal direction of the cylindrical fiber body,
It is more preferable to traverse while performing a rocking motion such as a zigzag motion. Further, the waveform is not just a vibration, but a triangular wave, a sine wave, a trapezoidal wave, etc., and these movements may be repeated cyclically. When employing minute vibrations, the frequency is not particularly limited, but is 0.1~
A range of 50 Hz is preferable, and the vibration direction may be perpendicular to the cylindrical fiber body or in the longitudinal direction. Further, the amplitude may be appropriately selected depending on the pitch interval of the nozzle holes and the vibration frequency, but a range of 0.5 to 50 mm is preferable.

Applying the above-mentioned compound motion can further reduce punch streaks and moire phenomena in the cylindrical fibrous body, and has the excellent effect of making the surface of the cylindrical fibrous body smooth. be. It goes without saying that if the cylindrical fibrous body processed by these methods is further turned over and treated again by the same processing method, the fraying resistance and anastomotic properties can be further improved.

The manufacturing method and apparatus for manufacturing the cylindrical fibrous body of the present invention described in detail above are mainly explained using an artificial blood vessel as the cylindrical fibrous body, but the invention is not limited to this, and examples include, for example, a general-purpose liquid feeding tube, a cylindrical string, etc. It goes without saying that the present invention can also be preferably applied to the fluid treatment of cylindrical fibrous bodies, and both are included in the present invention.

[Function] In such a method for manufacturing a cylindrical fibrous body and an apparatus for manufacturing the same, the mandrel inserted into the cylindrical fibrous body holds the cylindrical fibrous body along its longitudinal direction, and also prevents the cylindrical fibrous body from being ejected from the nozzle. After the injected high-pressure fluid penetrates through the cylindrical fibrous body, it is reflected on the surface of the mandrel, which has the effect of further enhancing fluid treatment effects such as the entangling effect. Further, the support body supports the mandrel into which the cylindrical fibrous body is inserted, while the supporting body supports the mandrel in such a manner that its support width spans the jetting width of the fluid of the nozzle and is in at least line contact with the mandrel. Since it is rotated, the cylindrical fibrous body is rotated while being held without shifting from the outer peripheral surface of the mandrel even during the injection of high-pressure fluid from the nozzle.

[Examples and Comparative Examples] In the apparatus for producing a cylindrical fibrous body according to the present invention as explained in FIG. 1 and FIG. 20mm in diameter
A stainless steel roll with a length of 1300 mm was used, and the surface of the support was coated with silicone rubber to prevent slipping. Two of these supports are arranged in a row at an interval of 25 mm, and a nozzle 8 with a fluid jetting width of 5° Omm is provided 40 mm above the cylindrical fibrous body to produce the cylindrical fibrous body of the present invention. Configured the device.

As the cylindrical fiber body 5, a 50-denier 24-filament tentative twisted yarn made of polyethylene terephthalate was used as the warp yarn and the weft yarn (back yarn), and the inner diameter was 19 mm by weaving it into a tube shape with a warp and warp double weave structure. A material for an artificial blood vessel with a length of 1200 mm was obtained. Then, in the subsequent process, the inner diameter is increased to 10~11++un by performing hot water washing, drying, Triclean treatment, napping treatment, etc.
An artificial blood vessel with a length of 1000 mm was obtained.

The obtained artificial blood vessel is inserted into the mandrel 6, and then placed between the supports 10a and 10b, and fluid treatment is performed by jetting high-pressure water at a pressure of 80 kg/ad and G from the jetting means 7. provided. It was rotated at a speed of 2.5 mm/min. The rotational speed of the cylindrical fibrous body was also 2.5 mm/win.

Note that the injection conditions for the injection means 7 are such that the nozzle hole diameter is 0.2.
5mm, discharge hole spacing 2.5+nm, nozzle frequency 3H
z, vibration width 10mm, nozzle movement speed 0°5m/mi
Traverse was carried out at n, and the entire length of the artificial blood vessel was treated.

The obtained artificial blood vessel had a nearly straight guideline indicating its straightness. Further, there was no irregularity in the outer diameter in the longitudinal direction.

When we measured the porosity (porosity: water permeability under 100 mmHg), which is an index showing the water permeability of the artificial blood vessel after this fluid treatment, the end side was 91 cc/m, the center part was 9
It was confirmed that the artificial blood vessel had a uniform water permeability in the longitudinal direction.

Comparative Example Next, in this comparative example, a conventional apparatus for manufacturing a cylindrical fibrous body shown in FIGS. 6 and 7 was prototyped, and fluid treatment was performed under the same jetting conditions as in the trial example.

That is, the exact same artificial blood vessel as shown in the example,
It is inserted into a cylindrical stainless steel mandrel 2 with an outer diameter of 10 mm and a length of 1200 mm, and the circumferential speed of the mandrel 5 is set to 2.5+n by the motor 3 via the chuck 21 without using a support.
It was rotated directly at a speed of m/min.

The guideline of the obtained artificial blood vessel curved from both sides toward the center, making almost one full rotation, and the outer diameter of both ends was 10.1 +++ m, and the outer diameter of the center was 10.7 m.
! It had 11 irregularities and could not be used as an artificial blood vessel.

In addition, when we measured the porosity of this artificial blood vessel, it was 91 cc/min at the ends and 118 cc/min at the center.
a, and had poor water permeability.

[Effects of the Invention] The present invention rotates the cylindrical fibrous body inserted into the mandrel while supporting the cylindrical fibrous body inserted into the mandrel in at least line contact with the support body over the width of the fluid ejected from the nozzle. Since the nozzle provided on the upper part of the cylindrical fibrous body sprays high-pressure water to perform fluid treatment, the cylindrical fibrous body and the mandrel are more securely held together even during the jetting of high-pressure water, and the cylindrical fibrous body is It is possible to prevent the occurrence of a cylindrical fibrous body that is free from body displacement, kinking, uneven outer diameter, uneven fiber density, etc., and has excellent resistance to fraying and anastomosis.

Therefore, the cylindrical fibrous body has a uniform fiber density and has excellent fraying resistance and anastomotic properties.

[Brief explanation of the drawing]

1 to 5 are diagrams showing an embodiment of a manufacturing apparatus for a cylindrical fibrous body according to the present invention, in which FIG. 1 is a schematic front view thereof, and FIG. 2 is an A of FIG. - A schematic cross-sectional view in the direction of arrow A;
3 is a schematic sectional view of a different aspect from FIG. 2, FIG. 4 is a schematic front view of an aspect further different from FIG. 1, and FIG. 5 is a schematic sectional view of an aspect different from FIG. 4. It is a schematic sectional view. FIG. 6 is a schematic front view of a conventional cylindrical fibrous manufacturing apparatus;
FIG. 7 is a schematic cross-sectional view taken along the line CC in FIG. 6. 1.5; cylindrical fibrous body 2.6: mandrel 3.12: motor 7: injection means 4.8: nozzles 10a-f: support body 15: rotation means L: injection fluid

Claims (7)

[Claims] (1) Injecting a mandrel inside the cylindrical fibrous body and rotating the cylindrical fibrous body while jetting a fluid toward the cylindrical fibrous body from a nozzle provided on the outside of the cylindrical fibrous body; In the method for manufacturing a cylindrical fibrous body in which the cylindrical fibrous body is subjected to fluid treatment, the cylindrical fibrous body is held by a support provided on the outside of the cylindrical fibrous body and the mandrel, and the cylindrical fibrous body is The gripping range in the axial direction of the mandrel is at least the range in which the cylindrical fibrous body is treated by jetting the fluid, and the surface of the support body of the gripped portion and the surface of the mandrel are moved in the same direction. A method for manufacturing a cylindrical fibrous body. (2) The method for manufacturing a cylindrical fibrous body according to claim 1, wherein the fluid is water. (3) By inserting into the cylindrical fibrous body a mandrel whose outer diameter is equal to or larger than the inner diameter of the cylinder of the cylindrical fibrous body,
2. The method of manufacturing a cylindrical fibrous body according to claim 1, wherein the cylindrical fibrous body is brought into close contact with the outer periphery of the mandrel. (4) a mandrel for rotatably holding the cylindrical fibrous body;
An apparatus for manufacturing a cylindrical fibrous body, comprising a drive means for rotating the mandrel, and a nozzle provided near the mandrel, and performing fluid treatment on the cylindrical fibrous body with fluid jetted from the nozzle, the apparatus is provided with a support that is paired with the mandrel and grips the cylindrical fibrous body, and the drive means is configured to rotate either the support or the mandrel to follow the rotation of the other. , or a driving means for rotating both the support body and the mandrel. (5) The apparatus for manufacturing a cylindrical fibrous body according to claim 4, wherein the mandrel is columnar or cylindrical. (6) The apparatus for manufacturing a cylindrical fibrous body according to claim 4, wherein the surface of the support body is treated with a non-slip finish. (7) The apparatus for manufacturing a cylindrical fibrous body according to claim 4, wherein the support is a water-permeable member.