JP2664502B2 - Hollow fiber winding device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a winding device for winding a hollow fiber used in an artificial dialyzer or the like.

To attach the hollow fiber to the artificial dialysis machine, the hollow fiber is unwound from a bobbin wound into a bobbin shape, and the hollow fiber is wound around a winding frame so that it can be easily cut into a fixed length. Are cut at a time into a bundle to form a form that can be mounted in a dialyzer.

The present invention relates to a winding device used for the above winding operation.

[Prior Art] In a conventional winding device, a hexagonal winding frame as shown in FIG. 11 was used. In the same figure, (205) is a gate-shaped frame in a side view, and six bosses (206) are attached. (201) is a hollow fiber fed from a bobbin (not shown), and (202) is a binding unit that bundles a bundle of hollow fibers.

When this winding frame is used, the bundle (204) of hollow fibers is cut at a fixed length (l) at six sides between the six frames (205). (6) is wasted at the six corners (203) adjacent to ()), and there is a problem that the loss of the hollow fiber is large.

In view of such circumstances, the present inventors have invented a two-point support type winding frame that requires a small loss of the hollow fiber.

The two-point support type take-up frame is configured such that two take-up rods are symmetrically arranged around a rotation axis, and the two take-up rods are wound with a hollow fiber for artificial dialysis. When this winding frame is used, a hollow fiber is wound around two winding rods (9) as shown in FIG. 10, and the whole is wrapped with a polyethylene sheet or the like, for example. By cutting (c) at both ends (that is, the position immediately adjacent to the winding rod), a bundle (F) of hollow fibers is obtained, and 7 to 10 bundles of hollow fiber modules are obtained from this bundle (effective sectional area of the module). The greater the is, the less). In this case, since there are only two portions (b) that are wasted, there is an advantage that the loss of the hollow fiber is significantly reduced as compared with the conventional generation of six waste portions.

However, in this two-point support type winding frame, the winding speed of the yarn changes every half rotation. That is, even if the peripheral speed of the leading end of the winding frame is the same, the amount of winding the yarn is different between the state in which the leading end of the winding frame moves substantially perpendicular to the yarn and the state in which it moves substantially parallel to the yarn.

Therefore, in the winding machine using the two-point support type winding frame, it is necessary to control to increase or decrease the amount of thread to be fed in accordance with the rotation angle of the winding frame.

[Problems to be Solved by the Invention] In view of such circumstances, the present invention (first invention) is capable of winding a hollow fiber with an appropriate tension using the above-mentioned two-point support type winding frame, and furthermore, high-speed winding. It is an object of the present invention to provide a take-up device that can be taken.

Further, in the present invention, it is necessary to accurately and quickly measure the outer diameter of the hollow fiber bobbin required for winding control. In principle, the outer diameter of the hollow fiber bobbin can be used without any limitation as long as the outer diameter can be measured in a non-contact manner. Lighting around the equipment (such as lighting in factories)
Can blur the contour, which can cause measurement errors. Thus, in the apparatus of the present invention, it has been necessary to measure the bobbin diameter using a different approach.

In view of such circumstances, an object of the present invention (second invention) is to provide a winding device capable of accurately and quickly measuring the outer diameter of a hollow fiber bobbin required for winding control.

[Means for Solving the Problems] The configuration of the present invention will be described with reference to FIG.

In the winding device of the first invention, the hollow fiber bobbin (3) is rotated by the bobbin drive motor (M4) to send out the hollow fiber (f), and two winding rods (9) are arranged at both ends of the frame. A winding device for rotating a winding frame (1) with a winding frame drive motor (M2) to wind the hollow fiber (f) between two winding rods (9). The bobbin outer diameter (D) obtained by the bobbin outer diameter determining means (21) for determining the bobbin outer diameter (D) of the hollow fiber bobbin (3), and (b) are set. Frame length (L) and rotation speed (R) of winding frame (1)
The rotation speed (R4) of the hollow fiber bobbin (3) necessary for winding the hollow fiber (f) on the winding frame (1) with the optimum tension
(22), (c) calculating the control signal and transmitting the control signal
A bobbin motor control unit (4) for rotating the bobbin drive motor (M4) based on a control signal from the calculation means (22).

In the first aspect, the bobbin outer diameter determining means determines the bobbin outer diameter and is not particularly limited as long as the result of the determination can be incorporated into the control process.

A winding device according to a second aspect of the present invention is the winding device according to claim 1, wherein (a) the hollow fiber (f) running on the winding of the hollow fiber bobbin (3) and the winding frame (1) has a predetermined range. A tension pulley part (5) for applying tension, and (b) a winding frame (1) and a hollow fiber bobbin (3) are rotated at a predetermined rotation speed, and the hollow fiber in the tension pulley part (5) at that time is rotated. (F) a detector (16) for detecting an increase or decrease in the tension, and (c) the bobbin outer diameter determining means (21) compares the detected value of the tension with a reference value to obtain an actual bobbin outer diameter. Is determined.

[Operation] The present invention (including the first invention and the second invention; the same applies hereinafter)
, The winding amount determined by the frame length (L) of the winding frame (1) and the degree of transfer (R), and the feeding amount determined by the bobbin outer diameter (D) and the rotation speed of the hollow fiber bobbin (3) are: During the balance, the hollow fiber (f) is wound on the winding frame (1) with an appropriate tension. Since the frame length (L) and the rotation speed (R) of the winding frame (1) are set each time,
After that, if the bobbin outer diameter (D) (which changes in the range of φ98 to φ250 mm in the case of a φ98 mm bobbin, for example) can be measured, it is inevitably determined what the bobbin rotation speed should be. .

In the first invention, based on the bobbin outer diameter (D) obtained by the bobbin outer diameter determining means (21), the calculating means (22)
The rotation speed of the hollow fiber bobbin (3) is calculated, a control signal is sent to the bobbin motor control unit (4), and the hollow fiber bobbin (3) is rotated at a required rotation speed. In other words,
In the first invention, predictive control is performed.

In the first invention, high-speed operation is possible because there is no reciprocating mechanism having large inertia and only the rotary mechanism is used. Even if the setting of the frame length (L) and the rotation speed (R) of the winding frame (1) is changed, an accurate bobbin rotation speed is automatically calculated and an optimum control signal is output, so that automatic operation is possible. become.

Next, according to the second invention, the tension pulley portion (5)
, The bobbin outer diameter (D) is back calculated based on the detection value of the detector (16). That is, since the outer diameter of the bobbin is not directly measured, no error occurs due to peripheral illumination or the like. Therefore, the bobbin outer diameter (D) can be accurately determined, and the bobbin rotation speed can be accurately calculated.

[Example] Next, an example of the present invention will be described.

1 is a functional block diagram of the present invention, FIG. 2 is a front view of a winding device according to an embodiment of the present invention, FIG. 3 is a plan view of the winding device shown in FIG. FIG. 5 is an enlarged view of the tension pulley portion in the embodiment, FIG. 5 is an electric circuit diagram of the winding device in the embodiment, FIG. 6 is a graph showing the number of rotations of the bobbin with respect to the rotation angle of the winding frame, and FIG. Is a flowchart of a winding operation in the winding device, FIG. 8 is a flowchart of a bobbin diameter determining step, and FIG. 9 is a flowchart of a steady operation step.

First, the mechanical configuration of the winding device of the present invention will be described with reference to FIGS. In the figure, (1) is a winding frame, (M
2) a winding frame drive motor, (2) a winding frame motor control unit, (3) a hollow fiber bobbin, (M4) a bobbin drive motor, (4) a bobbin motor control unit, and (5) a tension pulley. Department.

The winding frame (1) has two winding rods (9) fixed to both ends of an arm (8) attached to the tip of a rotating shaft (7). M2).

The hollow fiber bobbin (3) is a winding body in which the hollow fiber (f) is generally wound about 70 km or 140 km (with four ply yarns), and is rotated by a bobbin drive motor (M4). .
In the figure, twelve hollow fiber bobbins (3) are shown, but may be at least more. A bobbin drive motor (M4) and a bobbin motor control section (4) are individually connected to each hollow fiber bobbin (3).

One tension pulley section (5) is provided for each hollow fiber (f) sent out from each hollow fiber bobbin (3). The details will be described with reference to FIG. (11) is an arm, the base end of which is swingably supported by a support shaft (12), and a pulley (13) is rotatably attached to the distal end thereof. The hollow fiber (f) sent from the hollow fiber bobbin (3) is wound around the pulley (13). (14)
Is tensioned by a tension spring between the substrate (15) and the arm (11). This tension spring (1
The arm (11) is pulled downward by the action of 4), and tension is applied to the hollow fiber (f). Since the hollow fiber (f) is subjected to tension or slack due to the balance of the wire strength between the hollow fiber bobbin (3) and the winding frame (1), the arm (11) always has an arrow (z). Rocks in the direction.
That is, when the tensile force acting on the hollow fiber (f) is large, the arm (11) rises, and when the slack occurs, it is lowered by the tension spring (14). (16) is the support shaft (1
This is a detector that outputs a detection value corresponding to the swing position of the pulley (13) as a voltage using a potentiometer connected to (2). In other words, the potentiometer (16) is a detector for detecting the tension of the hollow fiber (f) in the tension pulley (5). (17) is a phototube, when the slack of the hollow fiber (f) reaches the limit (chain position of the arm (11)),
This is detected. That is, in the device of this embodiment, when it is detected that the photoelectric tube (17) generates slack that cannot be absorbed by the tension spring (14), it prevents the hollow fiber bundle (F) to be described later from becoming uneven. For this purpose, the winding mechanism is stopped.

As shown in FIG. 2, the tension pulley (5)
The hollow fiber (f) that has passed through is wound around a winding frame (1) via a guide pulley (18).

 FIG. 5 shows a control device according to the present invention.

Reference numeral (20) denotes a microcomputer, which has a CPU serving as a control center, and a ROM and a RAM for storing a calculation formula or a storage value necessary for calculation. This microcomputer (20) serves as a bobbin diameter determining means (21) and a calculating means (22) shown in FIG. The potentiometer (16) is connected to an input port of a microcomputer (20) via an amplifier (23) and an A / D converter (25). The tension or slack of the hollow fiber (f) detected by the potentiometer (16) is output at a voltage value in the range of + 5V to -5V, converted to a digital value by the A / D converter (25), and 20).

D / A from output port of microcomputer (20)
The control signal is output to the bobbin motor control unit (4) via the converter (26).

A feedback circuit (28) is connected to the counter (24) from the winding frame motor control unit (2) to detect the position and synchronize the bobbin drive motor (M4). The winding frame motor control unit (2) is connected to a power supply unit (not shown) and rotates the winding frame drive motor (M2) at a rotation speed set by a setting switch (29) described later. ing. It also traverses in synchronization with the take-up frame drive motor (M2).

The setting switch (29) includes a switch for setting a frame length (L) of the winding frame, a switch for setting a winding frame speed (R) that is a rotation speed of the winding frame (1), and 12 hollow fiber bobbins. (3)
Among them, there is a switch for selecting the bobbin to be used, a winding number setting switch for determining how many times the hollow fiber (f) is wound on the winding frame (1), and these set values are inputted to the microcomputer (20). It has become so.

The error sensor (30) detects errors in various parts of the winding device, and detects an alarm of the drive motors (M2) and (M4), and unlocks the hollow fiber bobbin (3).
Other sensors that detect various errors are included,
If any error is detected, the microcomputer (20) issues an emergency stop signal.

Now, the control signal output from the microcomputer (20) to the bobbin motor control unit (4) is not a signal for instructing a constant rotation speed, but a signal obtained by compressing a sine wave as shown in FIG. It must be a signal that commands the number of revolutions indicated by the waveform.

This is based on the fact that the winding frame (1) is not circular but has a two-point support type. That is, the winding frame (1) of the present invention.
Is different when the winding frame (1) is in the vicinity of the horizontal state and in the vicinity of the vertical state even when rotated at the same rotation speed. This is because it becomes maximum near the vertical state. Therefore, the bobbin drive motor (M4) is rotated every half rotation of the winding frame (1).
The rotation speed must be increased or decreased as shown in the curve in the figure. If the bobbin outer diameter (D) is different, the feeding amount of the hollow fiber (f) per rotation is different. Therefore, when the bobbin outer diameter (D) is small, the maximum rotation speed is increased, and the bobbin outer diameter (D If) is large, the maximum number of revolutions must be reduced. In the figure, Ra is Rb when the bobbin outer diameter is the minimum (98φ).
Is a curve showing the optimal bobbin rotation speed when the bobbin outer diameter is at the middle (174φ), and Rc is the curve when the bobbin outer diameter is at the maximum (in 250φ) (however, when winding at 70m / min).

Next, the winding control in this embodiment will be described with reference to the flowcharts of FIG. The following control contents
The bobbin diameter determining means of the second invention is applied as the bobbin diameter determining means of the first invention.

First, in steps (100) to (103), the frame length (L) of the winding frame (1), the rotation speed of the winding frame (1), and the number of windings are set, and the hollow fiber bobbin (3) is used. Select the bobbin to be used. If an error has occurred in the winding device in step (104) after the setting, an emergency stop is output (120). If there is no error, the operation is started as soon as the start command (105) is issued, the low-speed operation is performed (106), and the bobbin diameter determination (107) is performed while the winding frame (1) makes one rotation. The details will be described later with reference to FIG.

The bobbin outer diameter is determined, and if the maximum rotational speed of the bobbin during the steady operation can be calculated, the routine enters the steady operation in step (108). The bobbin rotation speed is continuously corrected even during the steady operation, the details of which will be described later with reference to FIG.

If an error occurs in the device during normal operation, an emergency stop signal is issued as in step (120). When the set number of turns is reached (109), a stop command is issued (1).
10), The device stops. When the set number of windings is reached and the operation is stopped, the bundle (F) of hollow fibers is removed from the winding frame (1) and cut. Thereby, a bundle (F) of hollow fibers is obtained.

Next, a bobbin outer diameter determining step, that is, a process of determining the bobbin outer diameter and calculating an appropriate bobbin rotation speed will be described with reference to FIG. In the next process, when the take-up frame (1) is in a horizontal state, for example, the origin is detected as a reference for control, and a start signal is input and the take-up frame (1) is input.
Is executed from the time when starts to rotate.

The concept of this control process will be described below. Assuming that the bobbin outer diameter is an intermediate value of φ174 mm, the hollow fiber bobbin (3) is rotated at a rotation speed (initial rotation speed) corresponding thereto, and the deflection of the tension pulley (13) is observed under these conditions. If the tension pulley (13) swings upward, it is determined that the feeding amount of the hollow fiber (f) is small (that is, the actual bobbin outer diameter is smaller than the intermediate value). Then, a command is issued to increase the rotation speed to within the range of the appropriate value. Conversely, if the tension pulley (13) swings downward, it is determined that the amount of hollow fiber (f) to be fed out is large (ie, the actual bobbin outer diameter is larger than the intermediate value), and a command is issued to reduce the bobbin rotation speed. Therefore, digital values 0 to 255 are assigned to the output voltage -5V to + 5V of the potentiometer (16), and the output value is compared with the center value 128.

 The details will be described below.

Step (111) in FIG. 8 is the above-described initial rotation speed setting step. That is, while rotating the winding frame (1) at a low speed, the output value from the potentiometer (16) is taken in every time the winding frame (1) is displaced by 1 ° during this time (11).
2) Calculate a rotation speed at which an appropriate tension can be generated in the hollow fiber (5) (113). The rotation speed is changed according to the result of the orbit calculation, and it is determined in step (114) whether or not the detected value of the potentiometer (16) is equal to or more than the reference value 128 (114). YES
In this case, since the vehicle has entered the balanced center range, a speed increase possible signal is issued. That is, a steady operation is started (108).

If the determination in step (114) is NO, step (11)
In 5), it is determined whether the detected value is equal to or more than the center value.
In the case of the above (YES), the hollow fiber (5) is in a slack state, and in the case of the following (NO), the hollow fiber (5) is in a tensile state. In the case of YES, the rotation speed is reduced (116), and in the case of NO, the rotation speed is increased (117). Thereafter, the process from step (112) is repeated until the detected value of the potentiometer (16) falls within the center range.

Next, the correction control of the bobbin rotation speed after the steady operation is started will be described with reference to FIG.

As the hollow fiber (5) is fed out even after the steady operation, the hollow fiber (5) tends to be pulled if the rotation speed remains the same because the bobbin radius decreases. Therefore, the trajectory calculation is performed at regular time intervals even during steady operation (12
1). If it is determined in step (122) that the detected value is equal to or larger than the center value, the process proceeds to step (123). If the determination result is YES, the operation is continued.
If the determination result is NO, it is determined in step (124) whether or not the current rotational speed is the maximum, and if NO, the rotational speed is increased (125).

On the other hand, if the decision result in the step (122) is NO,
Proceeding to step (126), if the determination result is YES, the operation is continued as it is. If the determination result is NO, it is determined in step (127) whether or not the current rotational speed is the lowest. If NO, the rotational speed is reduced (128).

As described above, while calculating the optimum rotation speed of the bobbin drive motor (M4), the control signal of the curve (see FIG. 6) corresponding to the rotation speed is transmitted to the bobbin motor control unit (4).
, And the steady operation is performed while applying the optimum tension to the hollow fiber (f).

[Effects of the Invention] According to the present invention, a hollow fiber can be wound on a two-point branch type winding frame at an appropriate tension at a high speed.

[Brief description of the drawings]

1 is a functional block diagram of the present invention, FIG. 2 is a front view of a winding device according to an embodiment of the present invention, FIG. 3 is a plan view of the winding device shown in FIG. FIG. 5 is an enlarged view of the tension pulley portion in the embodiment, FIG. 5 is an electric circuit diagram of the winding device in the embodiment, FIG. 6 is a graph showing the number of rotations of the bobbin with respect to the rotation angle of the winding frame, and FIG. Is a flowchart of a winding operation in the winding device, FIG. 8 is a flowchart of a bobbin diameter determining step, FIG. 9 is a flowchart of a steady operation step, and FIG. 10 is a hollow fiber bundle using a winding frame according to the present invention. FIG. 11 is an explanatory view showing an example of a conventional winding frame. (Main symbols in the drawings) (1): Winding frame (2): Winding frame motor control unit (3): Hollow fiber bobbin (4): Bobbin motor control unit (5): Tension pulley unit (9): Winding Rod (M2): Winding frame drive motor (M4): Bobbin drive motor

Claims (2)

(57) [Claims] A hollow fiber bobbin is rotated by a bobbin drive motor to send out a hollow fiber, and a winding frame having two winding rods disposed at both ends of the frame is rotated by a winding frame drive motor to form the hollow fiber. A winding device for winding a yarn between two winding rods, comprising: (a) a bobbin outer diameter determining means for determining a bobbin outer diameter of a hollow fiber bobbin; and (b) a bobbin obtained by the determining means. From the outer diameter and the set frame length and rotation speed of the winding frame, the rotation speed of the hollow fiber bobbin required to wind the hollow fiber onto the winding frame with the optimum tension is calculated, and a control signal is transmitted. (C) a winding device for a hollow fiber, comprising: a bobbin motor control section for rotating a bobbin driving motor based on a control signal from the calculating means. 2. A winding device according to claim 1, wherein: (a) a tension pulley portion for applying a predetermined range of tension to the hollow fiber running between the hollow fiber bobbin and the winding frame; A detector for rotating the winding frame and the hollow fiber bobbin at a predetermined number of revolutions and detecting an increase or decrease in the tension of the hollow fiber in the tension pulley at that time; (c) the bobbin outer diameter determining means includes: A hollow fiber winding device that compares a detected tension value with a reference value to determine an actual bobbin outer diameter.