JPH11349226A - Wire winding device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable a linear body to be wound around a bobbin with a set tension. SOLUTION: A bobbin 3 is rotationally driven by a servo motor 33, an actual tension of a linear body wound around the bobbin 3 is measured by a tension measuring mechanism 6, and the measured tension is inputted to a controller 100; The controller 100 controls the amount of power to the servomotor 33 in accordance with the difference between the set tension and the measured tension to increase or decrease the rotation speed of the bobbin 3. Thereby, the linear body can be wound around the bobbin 3 with the set tension.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for winding a linear body such as a monofilament material or a thread of a slide fastener on a bobbin.

[0002]

2. Description of the Related Art When a linear body is wound on a bobbin by rotating the bobbin by a rotation driving mechanism, if the linear body is wound with a constant tension, the linear body wound on the bobbin can be wound. Since the linear body can be sent out in a state where a constant tension is applied at the time of sending out, the sent linear body can be continuously processed with high accuracy.

[0003]

In order to wind a linear body around a bobbin with a constant tension, various methods of adjusting the tension by providing a tension adjusting mechanism have been used, but they have complicated structures. In addition, the tension could not be adjusted with high accuracy, and it was not satisfactory.

Accordingly, an object of the present invention is to provide a winding device for a linear body capable of solving the above-mentioned problems.

[0005]

According to a first aspect of the present invention, there is provided a bobbin 3 rotatably driven by a rotary driving source, and a tension measuring mechanism 6 for measuring the tension of a linear body 7 wound around the bobbin 3.
And a controller 100 that controls the rotation speed of the rotary drive source according to the tension of the linear body 7 measured by the tension measuring mechanism 6 to make the tension of the linear body 7 constant. It is a winding device for a linear body.

According to a second aspect of the present invention, in the first aspect, the rotary drive source is a servo motor 33 and the tension measuring mechanism 6 is an arm 16 which is swung in one direction by a spring 18.
A dancer roll 9 attached to the arm 16 and around which the linear member 7 is wound, and a potentiometer 19 for detecting the swing angle of the arm 16; Arm 16 is stationary in balance with the force of
Is the potentiometer 1 when the arm 16 is stationary.
9 as a reference value, and the difference between this reference value and the actual detection value of the potentiometer 19 is used as the actual tension of the linear body 7, and the amount of power to the servomotor 33 is increased or decreased according to the actual tension. This is a winding device for a linear body.

[0007]

According to the first aspect, the tension of the linear body wound around the bobbin is measured by the tension measuring mechanism, and the rotation speed of the rotary drive source is controlled in accordance with the measured tension. Thus, the winding speed of the bobbin 3 is controlled, so that the tension of the linear body 7 becomes constant. As a result, the tension of the linear body 7 wound around the bobbin 3 can be constantly wound as a constant tension.

According to the second aspect of the present invention, the amount of power to the servomotor 33 is increased or decreased according to the difference between the actual tension of the linear body 7 and the set tension, and the tension is set to the set tension. However, the linear body 7 can be wound around the bobbin 3 while maintaining the set tension with high accuracy.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a plurality of bobbin rotating shafts 2 are provided on an apparatus main body 1 in two stages vertically and at equal intervals in the horizontal direction. 1
And the bobbin 3 is detachably attached to the protruding portion.

A traverse arm 4 and a winding diameter measuring arm 5 are swingably provided near one bobbin rotation shaft 2 on one side vertical surface 1a of the apparatus main body 1. A tension measuring mechanism 6 is attached to one of the right and left sides of the apparatus main body 1.

A plurality of linear members 7 are delivered from a linear member delivery mechanism (not shown) with a constant tension, and each of the linear members 7 is sent out.
Is wound around each bobbin 3 via a linear guide 11 such as a roller provided at the tip of the traverse arm 4 via a main guide roller 8, each dancer roll 9 of the tension measuring mechanism 6, a guide roller 10, and the like. .

As shown in FIGS. 2 and 3, the tension measuring mechanism 6 has a box-shaped main body 13 attached to the left and right end surfaces 1b of the apparatus main body 1 via a bracket 12, and the main body 13 has a rotating shaft. 14 is attached in parallel with the bobbin rotation shaft 2. The number of the pulleys 15 equal to the number of the bobbin rotation shafts 2 is
Are fixed at intervals in the axial direction, an arm 16 having a dancer roll 9 is fixed to each pulley 15, and a first cable 17-1 and a second cable 17-2 are respectively wound. It is hung.

Each of the first ropes 17-1 has a spring 18
And each arm 16 is urged downward by a spring 18 to apply tension to the linear body 7 wound around the dancer roll 9, and the tension of the linear body 7 and the oscillating power of the arm 16. The arm 16 stops at a position where the balance is established. Each of the second cords 17-2 is connected to a rotating portion of a potentiometer 19, and the tension of the linear body 7 changes to change the arm 16
The arm swing angle at the time of swinging up and down is detected by the potentiometer 19, and thereby the tension of the linear body 7 is measured. 16a is a counterweight.

For example, the detection value of the potentiometer 19 when the arm 16 is stationary when the tension of the linear body 7 is the set tension is set as a reference value. When the tension of the linear body 7 becomes larger than the set tension, the arm 16 swings upward, the force of the spring 18 increases, and the arm swinging power increases. When the arm swinging power and the tension are balanced, the arm 16 moves. Stop. At this time, the magnitude of the tension of the linear body 7 is measured based on the difference between the detection value of the potentiometer 19 and the reference value, that is, the amount of change.

When the tension of the linear member 7 becomes smaller than the set tension, the arm 16 swings downward by the force of the spring 18, and
The force of the spring 18 is reduced to reduce the arm swinging power, and the arm 16 stops at a position where the arm swinging power and the tension are balanced. Potentiometer 19 at this time
The magnitude of the tension of the linear body 7 is measured based on the difference between the detected value and the reference value, that is, the amount of change.

Thus, when the tension of each linear body 7 wound around each bobbin 3 changes from the set tension, the amount of change in the tension can be measured.

As shown in FIGS. 4 and 5, the apparatus main body 1 is box-shaped, and the number of openings 21 formed in one vertical plate 20 is equal to the number of bobbins 3. A board 22 for closing each opening 21 is detachably attached to the one vertical plate 20 with bolts 23. The bobbin rotation shaft 2, the traverse arm 4, the winding diameter measuring arm 5, A rotation drive mechanism 24 for rotating the bobbin rotation shaft 2 and a traverse mechanism 25 for reciprocating the traverse arm 4 in the axial direction are mounted.

As described above, the bobbin rotation shaft 2, the traverse arm 4, the winding diameter measuring arm 5, the rotation drive mechanism 24, the traverse mechanism 25, and the like together with the substrate 22 can be removed from the apparatus main body 1 and their inspection can be performed. Easy maintenance work.

Next, the rotation drive mechanism 24 will be described with reference to FIG. The bobbin rotary shaft 2 is a hollow shaft formed by connecting a hollow proximal shaft 26 and a hollow distal shaft 27 with bolts 28, and the proximal shaft 26 is mounted on a cylindrical shaft 29 fixed to the substrate 22.
At 0, it is rotatably supported, and the front end shaft 27 protrudes from the substrate 22. Plate 31 fixed to the cylinder shaft 29
A rotary drive source, for example, a servomotor 33 having a speed reducer 32 is attached to the output shaft, and the output side of the speed reducer 32 is connected to the base shaft 26 via a drive timing pulley 34, a timing belt 35, and a driven timing pulley 36. When the servo motor 33 is driven, the bobbin rotary shaft 2 is driven to rotate. Thus, the rotation drive mechanism 24 is formed.

The bobbin 3 is a bobbin with a tapered flange having opposing tapered flanges 42, 42 having tapered winding surfaces 41, 41 inside at both ends of a winding drum portion 40. Into the shaft 27 on the tip end side of the bobbin rotation shaft 2 and mount it.

The distal shaft 27 has a plurality of slits 44, and a pressing plate 45 faces each of the slits 44.
Is provided movably in the radial direction, and the pressing plate 4
5 is biased by a spring 46 toward the center. The pressing plate 45 has a cam surface 47, and
A cam 49 attached to 8 faces the cam surface 47. The rod 48 is provided movably in the axial direction in the hollow portion of the bobbin rotation shaft 2, and is urged to move in one axial direction (a direction protruding from the proximal shaft 26) by a spring 50.

When the rod 48 moves to one side in the axial direction, the cam 49 is pressed against the cam surface 47, the pressing piece 45 is pressed outward, and is pressed against the mounting hole 43 of the bobbin 3, so that the bobbin 3 does not rotate. So hold.

A cylinder 51 is mounted facing the base end of the rod 48. When the cylinder 51 is moved to the other side in the axial direction against the spring 50 by the cylinder 51, the cam 4 is moved.
9 moves away from the cam surface 47 and the pressing piece 45 is moved toward the center by the spring 46. As a result, the holding piece 45 is
And the bobbin 3 can be removed.

The base end of the traverse arm 4 is shown in FIG.
As shown in FIG. 1, a linear guide 11 is attached to the traverse shaft 60, and the distal end thereof is attached. A roller 61 is attached to an intermediate portion of the traverse arm 4, and the linear body 7 is moved from the linear body guide 11 through the roller 61 to the bobbin 3.
It is wound up.

The traverse shaft 60 has a spiral groove 62 and a spline 63 as shown in FIG. The substrate 22
A first nut member 65 and a second nut member 66 are attached to the cylindrical shaft 64 so that the first nut member 65 and the second nut member 66 are rotatable and do not move in the axial direction. The first nut member 65 is provided with a ball that contacts the spiral groove 62, and the second nut member 66 is provided with an engagement piece that engages with the spline 63. When the first nut member 65 is rotated forward and backward, the traverse shaft 60 moves in the axial direction, and the second nut member 6
By rotating the traverse shaft 6 forward and backward, the traverse shaft 60 rotates forward and reverse.

A rotary drive source, for example, a servomotor 69 having a speed reducer 68 is mounted on a plate 67 fixed to the cylindrical shaft 64.
The output side of the speed reducer 68 is connected to the first nut member 65 via a timing pulley 70, a timing belt 71, and a timing pulley 72.

Thus, when the servomotor 69 is driven to rotate the first nut member 65 in the forward and reverse directions, the traverse shaft 60 reciprocates in the axial direction, thereby forming the traverse mechanism 25.

The base end of the winding diameter measuring arm 5 is shown in FIG.
As shown in FIG. 7, a measuring shaft 80 is fixed to one end of the measuring shaft 80, and a measuring roller 81 is rotatably attached to the end thereof. As shown in FIG. 7, the other end of the measuring shaft 80 is rotatably supported by a bearing 83 on a cylindrical body 82 fixed to the substrate 22, and the other end of the measuring shaft 80 is rotated by a potentiometer 84. The part 84a is connected. The potentiometer 84 is attached to the cylinder shaft 64 by a bracket 85. Thus, a winding diameter measuring mechanism is formed.

A first gear 86 and a second gear 87 are fixed to the second nut member 66 and the measuring shaft 80 so as to face each other, and a third gear 88 is attached to the first gear 86 and the second gear 87. When the third gear 88 reciprocates in the axial direction, the first gear 86 and the second gear 87 rotate in opposite directions.

More specifically, the first gear 86 protrudes outward from the notch 64a of the cylindrical shaft 64, and guides 89 are fixed to both side edges of the notch 64a. Are movably supported in the axial direction. The third gear 88 is a rack having teeth on both sides,
The gears mesh with the second gears 86 and 87, respectively.

As shown in FIG. 8, a plate 90 is fixed to the cylindrical shaft 64, and a moving means,
For example, a cylinder 91 is attached. This cylinder 91
, The third gear 88 reciprocates.

The expansion chamber 91a and the compression chamber 91b of the cylinder 91 are connected to the air source 9 by a switching valve 92 as shown in FIG.
3 and the atmosphere are controlled. When the switching valve 92 is set to the first position a, air is supplied to the extension chamber 91a, and the third gear 88 moves in the direction of arrow c, and the traverse arm 4 and the winding diameter measuring arm 5 swing in the direction of arrow. As shown by a dashed line in FIG.
0, and the linear body guide 11 comes closest to the bobbin 3. The air pressure in the extension chamber 91a is reduced by the pressure reducing valve 94,
For example, it is set to 3 kg / cm ^2, and the swinging power of the winding diameter measuring arm 5 is weak. When the linear body is wound up and the winding diameter increases, it swings in the opposite direction.

When the switching valve 92 is set to the second position b, air is supplied to the contraction chamber 91b, and the third gear 88 moves in the direction opposite to the arrow c, and the traverse arm 4 and the winding diameter measuring arm 5 move to the arrow. Swing in the opposite direction to the linear guide 1
1. The measuring roller 81 is separated from the bobbin 3 as shown by a two-dot chain line in FIG. As a result, the bobbins 3 are not obstructed when the bobbins 3 are attached to and removed from the bobbin rotating shaft 2.

When the winding diameter measuring arm 5 swings, the measuring shaft 80 rotates.
, And the detection signal of the potentiometer 84 is input to the controller 100 as shown in FIG. The controller 100 calculates a winding diameter based on the input signal, and calculates a traverse width according to the winding diameter. On the basis of the calculated traverse width, the power supply to the traverse servomotor 69 is controlled so that the actual traverse width matches the calculated traverse width.

For example, the dimensions and shape of the bobbin 3 and the linear body 7
The traverse width L corresponding to the winding diameter is calculated in advance based on the diameter of the traverse. Further, the number of rotations of the traverse servomotor 69 corresponding to the traverse width set based on the pitch of the spiral groove 62 of the traverse shaft 60, the reduction ratio, etc. is calculated, and the energization time corresponding to the number of rotations is set in the controller 100. I do. Then, by selecting an energizing time corresponding to the traverse width corresponding to the detected winding diameter, and changing the energizing time to the traverse servomotor 69, the linear body guide 11 is moved to a traverse width corresponding to the winding diameter. Just move. The traverse width described above, the number of rotations of the servomotor 69,
The controller 10 controls the energization time according to the input winding diameter.
The calculation may be performed with 0.

The controller 100 controls the amount of power to the servo motor 33 for rotating the bobbin in accordance with the input winding diameter, and reduces the rotation speed of the bobbin rotating shaft 2 as the winding diameter increases. The linear body 7 is wound with a constant tension. That is, if the winding diameter increases, the winding amount of the linear body per one rotation of the bobbin increases. Therefore, if the traverse speed is constant, the tension increases. Therefore, the rotation speed of the bobbin 3 is reduced to make the tension constant. I do.

The controller 100 receives the detection values of the potentiometers 19 of the tension measuring mechanism 6 and controls the amount of power supplied to the bobbin rotation servomotor 33 when the tension of each linear body 7 changes from the set tension. When the tension becomes larger than the set tension, the rotation speed of the bobbin rotation shaft 2 is reduced, and when the tension becomes smaller than the set tension, the rotation speed of the bobbin rotation shaft 2 is increased.

For example, the detection value of the potentiometer 19 when the tension of the linear body 7 is the set tension and the arm 16 is stationary is used as a reference value, and the reference value and the tension change to change the arm 1
The difference between the actual detected value of the potentiometer 19 and the actual detection value of the potentiometer 19 at the time of swinging is calculated as the actual tension, and the amount of current supplied to the servo motor 33 is increased or decreased according to the actual tension (the difference described above). The rotation speed of 3 is increased and reduced, and the tension is set as the set tension.

When the difference between the reference value and the actual detection value is positive, the tension is increased, and the amount of power to the servomotor 33 is reduced to reduce the speed of the servomotor 33, and the bobbin rotation speed is reduced to reduce the tension. Smaller. If the difference is negative, the servo motor 3
The servomotor 33 is accelerated by increasing the amount of power to the motor 3, and the bobbin rotation speed is increased to increase the tension.

As described above, when the bobbin rotation speed is reduced, the tension of the linear member 7 decreases, and as described above, the arm 16
Swings downward to increase the tension. When the tension reaches the set tension, the arm 16 stops and the detection value of the potentiometer 19 becomes the reference value.

As the bobbin rotation speed increases, the tension of the linear member 7 increases, and as described above, the arm 16 swings upward to decrease the tension. When the tension reaches the set tension, the arm 16 stops, and the potentiometer The 19 detected values become the reference values.

This tension control is performed after performing the above-described tension control based on the change in the winding diameter. However, without performing the tension control based on the above-described change in the winding diameter, the tension control described above keeps the tension constant. can do.

According to the above embodiment, the winding diameter of the linear body 7 wound on the bobbin 3 is actually measured, and the servomotor 69 is controlled in accordance with the measured actual winding diameter. Therefore, the traverse width with respect to the winding diameter can be changed with high accuracy.

Further, the traverse width is merely changed by controlling the servo motor 69 to change the moving distance of the linear guide 11, and the number of operating members is small and the operation error is small. Can be changed with higher accuracy.

When the first nut member 65 is rotationally driven by the traverse servomotor 69, the traverse shaft 60 is moved in the axial direction, whereby the linear guide 1 is moved.
Since the traverse arm 4 provided with 1 moves in the axial direction, the traverse width can be easily changed by rotationally controlling the traverse servomotor 69. As a result, the traverse width can be easily and accurately changed according to the winding diameter.

When the third gear 88 is actuated in one direction with a weak force, the winding diameter measuring arm 5 swings, and the measuring roller 81 is pressed against the bobbin 3 so that the wound linear member is moved. 7, the winding diameter measuring arm 5 swings in the opposite direction, so that the measuring shaft 80 is accurately rotated according to the winding diameter.
Since the rotation of the measuring shaft 80 is detected by the potentiometer 84, the winding diameter can be measured with high accuracy.

Further, since the winding diameter measuring arm 5 and the traverse arm 4 swing synchronously, the linear body guide 11
Moves in a direction away from the bobbin 3 as the winding diameter increases, so that the distance between the linear body guide 11 and the linear body 7 wound on the bobbin can be kept constant, and the linear body can be smoothly moved. 7 can be wound around the bobbin 3.

[0048]

According to the first aspect of the present invention, the bobbin 3
The tension of the linear body 7 wound around the bobbin 3 is measured by the tension measuring mechanism 6, the rotation speed of the rotary drive source is controlled according to the measured tension, and the winding speed of the bobbin 3 is controlled. The tension of the body 7 becomes constant. As a result, the tension of the linear body 7 wound around the bobbin 3 can be constantly wound as a constant tension.

According to the second aspect of the present invention, the servo motor 33 is controlled according to the difference between the actual tension of the linear body 7 and the set tension.
Since the tension is set to the set tension by increasing or decreasing the amount of power supplied to the wire, the linear body 7 can be wound around the bobbin 3 while maintaining the set tension with high accuracy while using a simple mechanism.

[Brief description of the drawings]

FIG. 1 is an overall schematic side view of a winding device for a linear body.

FIG. 2 is a longitudinal sectional view of a tension measuring mechanism.

FIG. 3 is a cross-sectional view of a tension measuring mechanism.

FIG. 4 is an enlarged side view of a bobbin mounting portion.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a sectional view of a mounting portion of a bobbin rotation shaft.

FIG. 7 is a sectional view taken along the line BB of FIG. 4;

8 is a sectional view taken along the line CC of FIG. 7;

FIG. 9 is an explanatory view of means for operating a third gear.

FIG. 10 is a schematic explanatory diagram of a control device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Device main body, 2 ... Bobbin rotation axis, 3 ... Bobbin, 4 ... Traverse arm, 5 ... Winding diameter measuring arm, 6 ... Tension measuring mechanism, 7 ... Linear body, 9 ... Dancer roll, 11 ... Wire Shape guide, 16: arm, 18: spring, 19: potentiometer, 29: cylindrical shaft, 33: servo motor, 4
0: winding drum, 41: taper winding surface, 42: taper flange, 45: pressing plate, 47: cam surface, 48: rod, 49: cam, 50: spring, 51: cylinder,
Reference numeral 60: traverse shaft, 62: spiral groove, 63: slit, 65: first nut member, 66: second nut member, 6
9 servo motor, 80 measuring shaft, 81 measuring roller, 84 potentiometer, 86 first gear, 87
Second gear, 88: third gear, 91: cylinder, 92: switching valve, 93: air source, 100: controller

Claims (2)

[Claims] 1. A bobbin 3 driven to rotate by a rotary drive source, a tension measuring mechanism 6 for measuring the tension of a linear body 7 wound on the bobbin 3, and a linear shape measured by the tension measuring mechanism 6. A controller 10 that controls the rotation speed of the rotary drive source according to the tension of the body 7 to make the tension of the linear body 7 constant.
A winding device for a linear body, comprising: 2. A servo motor 33 is used as the rotary drive source, the tension measuring mechanism 6 is pivoted in one direction by a spring 18, and an arm 16 is attached to the arm 16 and the linear body 7 is wound around the arm 16. And a potentiometer 19 for detecting a swing angle of the arm 16. When the tension of the linear body 7 is at a set tension, the arm 16 is stopped by balancing with the force of a spring 18. Reference numeral 100 designates a detected value of the potentiometer 19 when the arm 16 is stationary as a reference value, and determines a difference between the reference value and an actual detected value of the potentiometer 19 as an actual tension of the linear body 7. 2. The winding device for a linear body according to claim 1, wherein the amount of current supplied to the servomotor 33 is increased or decreased according to the tension.