JPS63339B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing fiber bundles cut into a certain length.

[Prior art]

Conventionally, fiber bundles, which are intermediate products for manufacturing brushes, synthetic tatami mats, hollow fiber reverse osmosis membranes, hollow fiber artificial kidneys, brushes, etc., have been produced by the method described in, for example, Japanese Patent Application Laid-open No. 100697/1983. Manufactured.

FIG. 7 is a partial front view of the fiber bundle manufacturing process in a conventional apparatus, and FIGS. 8 and 9 are front views of the fiber bundle. When manufacturing a fiber bundle using a conventional device, the continuous fibers that are continuously produced and transferred are wound up in a skein 21 of a skein winding device 20 to once form an annular fiber bundle 22. After that, the cut portions 23 and 24 of the annular fiber bundle 22 are cut, and
Only the portion where the fibers are straight is extracted to obtain a fiber bundle 25 of a certain length, which is an intermediate product shown in FIG.

[Problems to be solved by the present invention]

However, as described above, the fiber bundle 25 of a certain length, which is an intermediate product obtained by the conventional method, is wound up in the skein 21 and the cut portions 23 and 24 are cut in that state. Therefore, it is difficult to make the length of the fibers forming the fiber bundle 25 constant, and extremely advanced technology is required to obtain a high quality fiber bundle 25.

Fiber bundle 27 wound around corner part 26 of skein 21
is bent as shown in FIG. 9, and this bent fiber bundle 27 is used as waste when extremely uniform and high quality is required, such as in hollow fiber reverse osmosis membranes and hollow fiber artificial kidneys. However, this method had the disadvantage of significantly reducing productivity, such as increased amount of waste and work to remove the waste.

In addition, when used for brushes, synthetic tatami covers, brushes, etc., the bent fiber bundles 27 are sent to a post-processing step to correct the bending, and correction operations such as heat treatment with tension applied are performed. However, the company was struggling with the disadvantage of extremely poor productivity.

The object of the present invention is to provide a completely new method that overcomes the drawbacks of the prior art mentioned above.

[Technical means and actions to solve problems]

Means for effectively achieving the above-mentioned object of the present invention are as follows: (a) Both ends of the fiber _F1 cut to a certain length are placed in a gutter-shaped receiving member with an open upper part so that the fiber does not loosen. (b) The fiber F 1 stored in the member is held by the two gripping pieces B and B', and the fiber F ₁ is held horizontally, and the fiber F ₁ is lowered from above and stored. , B' to prevent the fiber F ₁ from loosening by restraining it with two restraining pieces _C and C' provided near the positions of the gripping pieces B and B'. (d) Two restraining pieces D, D' are installed outside the positions of the restraining pieces C, C' and restrain both ends of the fiber _F0 already housed in the receiving member. (e) releasing the restraint on _the fiber F ₁ by the restraining pieces C, C‖, and (f) the operations (b) to (e) above. This is a method for straightly bundling the fibers cut to a certain length by repeatedly storing the fibers F ₂ , F ₃ . . . Fn cut into a certain length in the receiving part and stacking them.

〔Example〕

The method of the present invention will be specifically explained below with reference to the drawings.

Figure 1 shows an example of an apparatus for continuously cutting and supplying fibers to a certain length, Figures 2A to 2D are explanatory diagrams showing the steps of the operation for forming fiber bundles according to the method of the present invention, and Figure 3 is Figure 4 is a front view of the main parts of the device with the above functions, Figure 4 is a side view of Figure 3, Figures 5 and 6 are
The figures are cross-sectional views, respectively, of FIG. 3, and show an example of a gripping piece for transferring fibers.

In carrying out the present invention, the functions of FIG. 1, which is shown as a specific example of a device that is installed as a pre-process of the device and which cuts continuous fibers to a certain length and converts them into straight fibers, will be explained.

The gripping pieces A ₁ to _{A 6} are attached at regular intervals to a chain 3 mounted on two foils 1 and 2, and are periodically rotated along the trajectory of the chain 3 as the wheels 1 and 2 rotate. move. The continuous fibers F wound around the supply drum 4 pass through a feed roll 5 and a storage device 6, and the end of the fibers F is held at a point X below the foil 1 by a pair of gripping pieces rotating on a chain orbit.
After being gripped by A ₁ and A ₂ , it continues to move to point Y and stops. Next, at point Y where the gripping pieces A ₁ and A ₂ have stopped rotating, the knife 7 cuts approximately the center of the fiber F held by the gripping pieces A ₁ and A ₂ .

After the ends of the fibers are completely cut, the foils 1 and 2 are rotated again, and the fibers F held by the gripping pieces A ₁ and A ₂ are advanced by a certain length L and stopped at point Z. At the same time, the gripping pieces A ₃ and A ₄ attached to the rear of the gripping pieces A ₁ and A ₂ with a fixed length L grip the fiber F at the X point, advance to the Y point, and then stop.
Next, the fiber F held between the gripping pieces A ₃ and A ₄ is cut at the center with the knife 7 .

As a result of this operation, a fiber F ₁ of a constant length L with both ends cut off is gripped between the gripping pieces A ₂ and A ₃ . Furthermore, if this is gripped with another gripping piece B, B', it is possible to take out the straight fiber F cut to a certain length L by the gripping pieces B, B'.

Therefore, by periodically repeating the above operation, it is possible to convert the connected fibers into straight fibers cut to a certain length, and to supply the straight fibers. Also, during the above operation, the fiber F is cut and the gripping pieces B,
If the time involved in changing the grip of the fiber _F1 by B' is absorbed by the storage device 6, the supply drum 4
It is possible to continuously carry out the process from supplying the fiber F to taking out the fiber _F1 by the gripping pieces B and B'.

Furthermore, when a fixed number of fibers F ₁ taken out by the gripping pieces B and B' are piled up horizontally to form an orderly bundle, as mentioned above, in the case of a weak material such as fiber, the fibers F In this embodiment, it is necessary to store the receiving member 8, which is a gutter-shaped receiving member with an open upper part and has a U-shaped cross section, so that the receiving member ₁ does not slacken during the transition.

However, in order to satisfy the above conditions, fiber
In order not to release the tension of fiber F ₁ during the process from taking out F ₁ to storing it in the receiving member,
It is necessary to operate the fiber _F1 so as not to release the grip on both ends.

In order to satisfy the above requirements, an operating method according to the present invention will be explained with reference to FIG.

In the step diagram A, both ends of the fiber _F1 , which has been cut into a certain length and taken out by the device shown in _FIG . The tension is maintained to the extent that it does not sag.

Next, as a first operation, the gripping pieces B, B' are lowered toward the receiving member 8 installed below. On the other hand, the restraining pieces C and C' of the fiber _F1 are waiting above the receiving member, and at the same time, the restraining pieces D and D' restrain both ends of the fiber _F0 already stored in the receiving member 8.

In addition, the above-mentioned gripping pieces B, B', restraining pieces C, C', D,
D′ is a type of mechanical element that grips the fibers,
Therefore, the elements for moving and operating these are connected.

Next, as a second operation, as shown in step diagram B, when the gripping pieces B and B' have descended to the vicinity of the receiving member, the restraining pieces C provided inside the gripping pieces B and B'C' is lowered and both ends of the fiber F ₁ are restrained by the receiving member 8 to prevent the fiber F ₁ from sagging.

After that, proceed to step C, and the gripping piece B,
Release the grip of the fiber _F1 by B′, and the grip piece B,
Raise B′ to the waiting point. (Third operation) Also, at almost the same time, the restraining pieces D and D', which are installed outside the positions of the restraining pieces C and C' and restraining both ends of the already stored fiber _F0 , are raised. ,
Flip up the outer end portion F _{1 ′} of the fiber F 1 that has been restrained by the restraining pieces C and C′, and then flip up the outer end portion F ₁ ′ of the fiber F 1 restrained by the restraining pieces C and C′, and then
Move it to a position above F ₁ ′.

Next, the restraining pieces D and D' are lowered toward the receiving member 8 again to restrain both ends of the fiber F ₁ and the fiber F ₀ . (Fourth operation) And as a fifth operation, the above-mentioned deterrent piece D,
After the restraint by D' is completely implemented, the restraint of restraint pieces C and C' is released as shown in step diagram D, and the restraint pieces C and C' are returned to the standby point position to complete the series of operations. .

Although there is no particular restriction on the arrangement relationship between the gripping pieces B, B' and the restraining pieces C, C' or the restraining pieces D, D', the tension of the fiber _F1 can be reliably maintained and the receiving member 8 can be smoothly moved. The above relationship is preferable in terms of storage.

As described above, by repeating these operations, it is possible to store a certain number of fibers from the gripping pieces B, B' into the receiving member 8 while maintaining the tension of the fibers.
The object of the present invention can be achieved most effectively.

FIG. 3 is an example of a device equipped with the above operations.

The continuous fiber F ₁ is cut into a certain length by a device as shown in FIG. 1, and is held horizontally between gripping pieces A ₂ and A ₃ attached to a chain 3. Next, the gripping piece B above the fiber _F1 ,
B′ is pushed downward by the action of the cylinder connected to it, and in the vicinity of said fiber F ₁ , the fiber F ₁
Switch the grips from the gripping pieces A ₂ and A ₃ to the gripping pieces B and B'.

FIGS. 5 and 6 show a specific example of the device for changing the grip of the fiber _F1 .

FIG. 5 shows the release mechanism of the fiber F ₁ of the gripping pieces A ₂ and A ₃ . Cylinder 12 for moving grip pieces B, B'
A plate cam 13 is attached to one end, and the plate cam lowers simultaneously with the lowering of the gripping pieces B and B', and the roller 15 fixed to the tip of the gripping lever 14 of the gripping piece A ₂ (or A ₃ ) moves downward. The peripheral surface is pressed against the inclined part of the plate cam 13, and the lever 14 begins to open. Immediately after the gripping pieces B and B' contact the fiber and complete gripping, the lever 14 of the gripping piece A ₁ is fully opened, and the fiber F ₁
is completely released from the gripping pieces A ₁ and A ₃ .

In addition, gripping piece B, which is carried out simultaneously with the above operation,
The gripping mechanism of fiber F ₁ by B' is shown in FIG.

Initially, the gripping pieces B, B' are held at a waiting point set above the fiber _F1 , and the lever 1 of the gripping pieces B, B' is
A roller 16 fixed to the tip of the gripper 7 is pressed against the gripping pieces B, B' by a plate cam 18 fixed opposite to the gripping pieces B, B', so that the lever 17 is in a fully open position. Next, the gripping pieces B, B' are lowered by the cylinder 12 and immediately before the point where they come into contact with the fiber _F1 , the gripping pieces B, B' are moved along the inclined surface of the plate cam 18.
The lever 17 of B' begins to close while pinching the fiber F ₁ , and the fiber F ₁ is completely gripped at the waiting point.

Therefore, in the vicinity of the waiting point of fiber _F1 , the fifth
Since _the operations shown in _{Figs .}
The grip is then changed to the gripping pieces B and B'.

Subsequently, the fiber F ₁ gripped by the gripping pieces B, B' is placed in the U-shaped receiving member 8 by the restraining pieces C, B _' , in accordance with the operating steps shown in FIG.
It is stored in a restrained state with C' or D, D'.

As shown in Fig. 4, the restraining pieces C, C' and the restraining pieces D, D' swing around the O-axis and repeatedly restrain or detach the fiber _F1 , but their operation is controlled by an independent drive such as a cam. This is carried out by a source (not shown).

As the fibers F ₁ , F ₂ . . . Power changes. For this purpose, a spring 11 is installed below the receiving member 8 and the holder 9 that grips it, and as the thickness of the laminated bundle increases, the receiving member 8 and holder 9 gradually descend, and the above-mentioned restraining pieces C, C', D, The deterrent point of D′ is positioned at a constant position, and the deterrent force is maintained almost uniformly.

On the other hand, since the fibers F supplied from the gripping pieces B and B' to the receiving member 8 are always placed in a fixed position, in order to fill the U-shaped receiving member with fiber bundles F' at a uniform density, the receiving member 8 etc. It is effective to periodically reciprocate the base 10 to be loaded with a constant width in a direction perpendicular to the receiving member 8.

Furthermore, since it is easy to automatically transfer the fiber bundle formed by the above-mentioned device to a conveyor (not shown) installed separately for each base 10, connection with the next process is possible. This leads to labor savings.

〔Effect of the invention〕

As described above, the method of the present invention makes it possible to produce straight bundles by stacking fibers cut to a certain length and continuously supplied in an orderly horizontal manner without releasing the tension holding the fibers.

Therefore, the method for producing bundles according to the present invention can easily produce highly uniform, high-quality fiber bundles with no curls, and generates almost no fiber waste, compared to the case of producing fiber bundles using the conventional skein winding method. It is possible to obtain it effectively without. Furthermore, since this method is a completely mechanized method, it can be connected to the next process relatively easily, and this allows for significant improvements in labor and energy savings.

Fields of application of the method of the present invention having the above-mentioned advantages include brushes, synthetic tatami mats, hollow fiber reverse osmosis membranes, and hollow fiber artificial kidneys.

[Brief explanation of the drawing]

Fig. 1 is an example of an apparatus for continuously cutting and supplying fibers to a certain length, Fig. 2 A to D are explanatory diagrams showing the steps of the operation for forming a fiber bundle according to the method of the present invention, and Fig. 3 is a front view of the main part of the device having the above functions, Figure 4 is a side view of Figure 3, Figures 5 and 6 are
The figure is a cross-sectional view of FIG. 3, showing an example of a gripping piece for transferring fibers, and
The figure is a partial front view of the fiber bundle manufacturing process in a conventional apparatus, and FIGS. 8 and 9 are front views of the fiber bundle of FIG. 7. A ₁ to A ₆ , B, B'...Gripping piece, C, C', D,
D'...deterrent piece, F, F ₀ , F ₁ , F'... fiber, 1,
2...Foil, 3...Chain, 4...Supply drum, 5...Feed roll, 6...Storage device, 7...
Knife, 8... Receiving member, 9... Holder, 10...
...Base, 11...Spring, 12...Cylinder, 1
3,18...Plate cam, 14,17...Lever, 1
5, 16...roller, 20...skein winding device,
21... Skein, 22... Annular fiber bundle, 23,2
4... Cutting portion, 25... Fiber bundle, 26... Corner portion, 27... Fiber bundle.

Claims (1)

[Scope of Claims] 1 (a) Two gripping pieces B and B hold both ends of the fiber _F1 cut to a certain length in a gutter-shaped receiving member with an open upper part to prevent the fiber from loosening. ’ to grasp it,
(b) The fiber F ₁ stored in the member is held horizontally by two restraints provided near the positions of the gripping pieces B and B _' . preventing the fiber _F1 from loosening by restraining it with the pieces C and C'; (c) releasing the grip of the fiber F' by the gripping pieces B and B'; (d) the restraining pieces C and C. The two restraining pieces D and D' installed outside the position of ' and restraining both ends of the fiber F ₀ already housed in the receiving member are released, and both ends of the fiber F ₁ are restrained. (E) Release the restraint on the fiber F ₁ by the restraining pieces C and C′, and (F) Repeat the operations (A) to (E) above to cut the fiber F ₂ to a certain length. , F ₃ ... A method of straightly bundling fibers cut to a certain length, which comprises storing Fn in the receiving part and stacking them.