JPH0659974B2 - Tension device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a tension device for applying a constant tension to a winding wire of a winding machine or the like, more specifically, setting and changing the magnitude of tension using a motor. The present invention relates to a tension device that can be easily performed.

<Prior Art> A conventional tension device of this type is used in a winding machine or the like, and, for example, imparts a constant tension suitable for winding work wound around a coil bobbin to a winding supplied from a supply bobbin. Used for purposes.

FIG. 8 is a schematic diagram showing the basic structure of a tension device used in a winding machine.

The tension device main body 110 of the winding machine is basically a main tension pulley (brake pulley) 114 to which a braking torque is applied, a tension bar 115 for absorbing fluctuations in the wire tension, and this tension bar. 1
It has a pulley 117 provided at the swinging end of 15, and is configured to apply tension to the main tension pulley 114 and the winding drawn through the pulley 117. The main tension pulley 114 is a device that brakes the rotation along the movement of the winding wire. Conventionally, the control torque given to the main tension pulley 114 applies a band brake to the outer circumference of a disc that rotates integrally with the main tension pulley 114. It is caused by. Then, the adjustment of the braking torque has been performed by adjusting the pressure of the band brake.

However, since the pressure of this band brake may change over time, recently, the braking torque to the main tension pulley is applied by the magnet and the magnetic disk that face each other without contact, and the gap between the magnet and the magnetic disk is also increased. There is a method in which the braking torque applied to the main tension pulley can be set by adjusting the braking torque.

The winding 103 that has passed through the main tension pulley 114 is passed through the idle pulley 118, and the pulley 117 and the idle pulley 10 provided at the swing end of the tension bar 115.
4. The bobbin 102, which is rotated at a high speed by the winding machine main body 101, is wound up through the nozzle 105.

The nozzle 105 is moved in the horizontal direction in the figure by the winding machine body 101.

The tension bar 115 can swing about the tension bar shaft 11 as a fulcrum, and a back tension spring 112 applies a rotational force in the clockwise direction in the figure, and swings to absorb variations in back tension. A certain tension is secured at the winding position.

Regarding the adjustment of the back tension of the tension lever, the tension spring can be replaced or the mounting position thereof can be changed by removing the lid of the housing or by adjusting the knob from the outside of the housing.

<Problems to be Solved by the Invention> In the above-described conventional tension device, the adjustment of the braking torque to the main tension pulley and the adjustment of the back tension of the tension bar are performed by one unit each time the specifications of the winding are changed. It has the drawback of having to do it one by one. These operations are a major obstacle to improving the overall production efficiency, especially when a large number of windings are simultaneously performed by an automated device.

Further, the conventional device has a drawback that it does not have a means for correcting the tension of the wire rod when the tension of the wire rod changes during the winding operation.

A main object of the present invention is to provide a tension device that enables setting and changing the back tension of the tension bar by setting from outside at the start of winding and during winding.

In order to achieve the main object, the tensioning device according to the present invention includes a brake that applies a variable braking torque to a main tension pulley 22 that applies tension to a drawn line P, and a line P between the main tension pulley 22 and a winding position. A tensioning device for a winding machine, which has a contacting swinging end and is urged in a direction to give a back tension, for giving tension to a winding wire. Coupled to the spring support member provided with a moving portion for changing the acting force of the spring on the tension bar 36, and the back tension by rotating the moving portion based on the input data to move the moving portion. Motor 2 to adjust
It is configured by providing 10.

The acting force on the tension bar 36 can be applied to the tension lever 32 that rotates integrally with the tension bar 36 via the spring support member.

The spring support member includes a swing lever 25 rotatably provided so as to engage a tension lever 32 that rotates integrally with the tension bar 36 in a direction that applies the back tension to the tension bar 36, and A moving piece 29, which is a moving portion that supports one end of a spring 30 that gives back tension, and that is provided on the swing lever 32 such that the distance from the center of rotation thereof is adjustable.
Can consist of:

<Embodiment> Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing an embodiment of a tension device according to the present invention.

FIG. 2 is a vertical sectional view taken along the line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG.

FIG. 4 is a rear view showing the inside with the back cover removed.

FIG. 5 is a sectional view taken along line C-C in FIG.

First, the outline of the present embodiment will be described with reference to FIGS. 1 and 2.

An air cylinder 45 and a mounting shaft 76 are attached to the lower surface of the tension device main body (hereinafter referred to as the main body) 11.

The mounting shaft 76 is for mounting the main body 11 on a winding machine (not shown). The mounting shaft 76 is embedded in the main body 11, and the mounting shaft 76 is inserted and fixed in a tension device mounting bracket 77 fixed to the winding machine.

The front surface of the main body 11 is covered by the front cover 12, and the front surface of the front cover 12 includes the wire retainer 55, the main tension pulley 22, the auxiliary tension pulleys 41 a and 41 b, the micro switch 74, the snell guide 66, and the tips of the tension bar 36. And a pulley 40 attached to the.

The snell guide 66 is for guiding the wire P from the supply bobbin (not shown) to the tension device.

A wire P supplied from a bobbin not shown is a snell guide 6
After being hung on 6, the wire is guided to the main tension pulley 22 via the wire retainer 55 and wound around the main tension pulley 22. A braking torque is applied to the main tension pulley 22 by the electromagnetic brake in response to the attempted rotation.

The line P indicates the pulley 4 provided at the tip of the tension bar 36 via the auxiliary tension pulleys 41b and 41a.
After being multiplied by 0, it is wound while being pulled out by the rotation of a coil bobbin driven by a winding machine (not shown).

The tension bar 36 is for absorbing the fluctuation of the tension of the line P. Auxiliary pulley 4
1a and 41b are for changing the moving direction of the line P and increasing the winding length of the main tension pulley 22 and the pulley 40.

In addition, the stepping motor 2 built in the main body 11
Reference numeral 00 is for adjusting the braking force of the main tension pulley 22, and stepping motor 210 is for adjusting the urging force that gives the habit of turning the tension lever 36.

The pressure sensor 220 is provided as a means for detecting the tension of the running line P, and the auxiliary pulley 41.
The pressure resulting from the movement of the center position of b is detected and output.

Next, the configuration and operation of the main details of this embodiment will be described.

The wire retainer 55 guides the winding wire P guided by the snell guide 66 to the main tension pulley 22, and prevents the wire P from coming off the main tension pulley 22 and from sagging.

The force with which the wire retainer 55 retains the wire can be arbitrarily set by turning an adjustment nut (not shown).

The braking force is the opposing permanent magnet 48 and magnetic disk 49.
Is generated by applying a braking torque to the main tension pulley 22.

As shown in FIG. 2, the main tension pulley 22 is fastened and fixed to the disc fixing plate 21 by a disc fixing plate mounting screw 51 and a nut 85. Since the magnetic disk 49 is fixed to the disk fixing plate 21, the main tension pulley 22 and the magnetic disk 49 move integrally, and the front cover 12 has radial bearings 63, 6
3 is rotatably supported by a bearing portion 12 provided on the front cover.

Therefore, the main tension pulley 22 and the magnetic disk 49
Can rotate smoothly with respect to the front cover 12.

On the other hand, a permanent magnet 48 arranged to face the magnetic disk 49 is fixed to the magnetic pole fixing plate 17 with an adhesive, and the magnetic pole fixing plate 17 is fixed to the magnetic pole shaft 16 by a magnetic pole fixing plate mounting screw 47.

FIG. 6 is an explanatory diagram for explaining the relationship between the magnet that generates the braking torque and the magnetic disk.

As for the permanent magnet 48, as shown in FIG. 6, a plurality of permanent magnet pieces are arranged in an annular shape by alternately changing the polarities of N and S, or
It is magnetized so as to have a magnetic pole arrangement similar to that shown in FIG. 6 on one annular ferromagnetic material.

Incidentally, FIG. 6 shows the permanent magnet 48 in a plan view for easy understanding. The rotation of the magnetic disk 49 facing the N and S magnetic poles of the permanent magnet 48 causes an eddy current to be generated in the magnetic disk 49 to generate a braking torque therebetween.

Since the strength of this braking torque is determined by the distance between the permanent magnet 48 and the magnetic disk 49, the steady torque setting is the permanent magnet 4
The position 8 is moved forward and backward toward the magnetic disk 49.

The magnetic pole shaft 16 is attached to the gear 2 by a gear mounting screw 206.
03 is fixed, and the gear 203 is the stepping motor 2
00 by a gear 201 fixed to the rotary shaft of
It is rotated through 2.

On the other hand, the torque adjustment ring support frame 2 fixed to the main body 11
The torque adjusting ring 204 is rotatably supported by fitting the screw grooves to each other. The torque adjusting ring 204 is also fixed to the magnetic pole shaft 16.

Therefore, by operating the stepping motor 200 to rotate the torque adjusting ring 204, the position of the permanent magnet 48 is moved forward or backward with respect to the magnetic disk 49 to narrow the gap between the permanent magnet 49 and the magnetic disk 49. Can be spread and spread.

FIG. 7 shows a block diagram of the circuit of the device according to the invention.
The motor 200 is a stepping motor for adjusting brake torque, and the motor 210 is a stepping motor for adjusting back tension. The control unit 230 drives each motor according to the input from the data input unit 233. 231,
Reference numeral 232 indicates a signal line.

The brake torque adjusting steps 201 to 206 are driven by the brake torque adjusting stepping motor 200 and displayed on the dial 15.

Back tension adjusting parts 24 to 29, 211 to 2 by the stepping motor 210 for adjusting the back tension.
15 is driven and the mark 70 is moved. When the power is turned on, the stepping motor 200 is rotated in reverse to rotate the permanent magnet 48.
After returning the position to the normal position, it is set to the position according to the specifications of the winding according to the numerical value input in advance.

It should be noted that the above-mentioned steady position is detected by providing a sensor (not shown) and making a judgment based on a change in the output of the sensor, or by step-out of the stepping motor 200. Line P drawn next
I will explain how to give back tension to.

As shown in FIG. 1, the pulley 40 that gives back tension is attached to the tip of the tension bar 36 via a pulley attachment piece and a radial bearing (not shown).

At the other end of the tension bar 36, the tension bar ring 3
7 is fixed, and the tension shaft 31 is fixed to the tension burring 37. As shown in FIG. 3, the tension shaft 31 is rotatably supported by radial bearings 65, 65 on a tension shaft seat 35 provided on the front cover 12. The tension lever 3 is attached to the inner end of the tension shaft 31 via a tension lever ring 33.
One end of 2 is fixed.

Therefore, the tension bar 36, the tension shaft 31,
The tension lever 32 rotates integrally.

A contact roller 34 is provided at the other end of the tension lever 32.
Are attached by screws 81 and nuts 86. The contact roller 34 is always in contact with the lower surface of the swing lever 25 as shown in FIG. FIG. 4 shows a state where no tension is applied to the winding P.

The swing lever 25 is swingably supported by a lever shaft 24 implanted inside the front cover 12 via radial bearings 64, 64, and can freely rotate about the lever shaft 24 as a fulcrum. The adjusting screw 27 supported by the frame of 25 has a spring hook nut (moving piece) 29.
However, the moving piece is screwed into
As it is pulled downward in the figure, the swing lever 25
Is always biased counterclockwise in FIG.

However, the counterclockwise rotation of the swing lever 25 in FIG. 4 is regulated by the limit of the counterclockwise rotation of the tension lever 32, and the limit of the counterclockwise rotation of the tension lever 32 is the limit of the front cover 12. It is regulated by a rubber stop ring 67 fitted to the side protrusion 12a.

The other end of the adjusting spring 30 is hooked in a spring hooking hole 42a provided for hooking the adjusting spring on the V-shaped lever 42. The V-shaped lever 42 is swingably supported by a shaft pin 61 implanted inside the front cover 12,
The shaft pin 61 can move freely around the fulcrum, but during normal winding, the air cylinder 45 operates and the air cylinder rod 45a is pushed out as shown in FIG. 4 and attached to the V-shaped lever 42. The roller 43 is pushed to fix its position. Then V-shaped lever 42
The position of the spring hooking hole 42 at the other end of the adjusting spring, that is, the lower end of the adjusting spring is fixed.

Therefore, the counterclockwise rotational force of FIG. 4 given to the swing lever 25 is determined only by the position of the moving piece 29 with which the upper end of the adjusting spring 3 is hooked. As described above, since the lower end of the swing lever 25 always pushes the contact roller 34 of the tension lever 32, the back tension applied to the pulley 40 is determined by the position of the moving piece 29 attached to the swing lever 25. Will be.

The spring hook nut (moving piece) 29 has a female thread cut off, and the adjusting screw 27 is screwed into this female screw. Therefore, by rotating the worm wheel 215 fixed to one end of the adjusting screw 27, the moving piece 29 is moved. Since the distance between the moving piece 29 and the lever shaft 24, which is the swing fulcrum, is changed by moving the adjusting screw 27 in the axial direction, the back tension can be adjusted. A mark 70 painted with red paint is provided on a part of the moving piece 29 in order to show how much the back tension adjusted in this way is currently.
The mark 70 is visible from the outside of the back cover 13.

As shown in FIGS. 4 and 5, the worm wheel 215 is rotated by the gear 211 fixed to the rotation shaft of the stepping motor 210 via the gears 212, 213 and the worm 214.

In FIG. 4, when the adjusting screw 27 is turned by the stepping motor 210 to move the position of the movable piece 29 to the left in the drawing, the back tension becomes strong, and when it moves to the right, the back tension becomes weak.

The control of the stepping motor 210 is performed by the control unit 230 shown in FIG. 7. When the power is turned on, the stepping motor 210 is rotated in the reverse direction to return the position of the moving piece 29 to the steady position, and then according to the value input in advance. , Set to a position according to the winding specifications.

The steady position is detected by providing a sensor (not shown) and making a determination based on a change in the sensor output, or by stepping out the stepping motor 210.

Next, the adjustment of the tension in the winding will be described.

During winding, the force of pulling the wire P in the winding direction, the braking force of the main tension pulley 22, and the tension bar 36.
A tension within a certain range, which is determined by the back tension applied to the line P, is applied to the line P. Then, a small change in the tension is absorbed by the tension bar 36 swinging slightly while being balanced with the tensile force of the wire P wound around the pulley 40.

If a strong tension that cannot be absorbed by the swing of the tension bar 36 is generated in the wire P during winding, the pressure sensor 220 shown in FIG. 1 detects this.

Auxiliary pulley holder guide 5 with built-in pressure sensor 220
3 is fixed on the front cover 12.

The auxiliary pulley 41b is attached to the auxiliary pulley holding portion 52, and the auxiliary pulley holding portion 52 can move forward and backward along the inner side of the auxiliary pulley holding portion guide 53 with respect to the portion where the auxiliary pulley 41b contacts the line P. .

In the normal state in the winding, the auxiliary pulley 41b is lightly in contact with the pressure sensor 220, but when the tension of the wire P becomes strong, the pressure sensor 220 sends an output corresponding to this to the control unit (not shown), and the main tension pulley. The stepping motor 200 is controlled so as to weaken the braking force of the line 22, and the line P
When the tension of the stepping motor 2 becomes weaker, the pressure sensor 220 sends an output corresponding to this to a control unit (not shown) to increase the braking force of the main tension pulley 22.
00 is controlled.

In order to show how the state of the braking force of the main tension pulley 22 adjusted in this way is at present, the dial 15 is attached to the rotary shaft of the stepping motor 200, and the dial 15 is marked with a scale on the front side. It is visible from the outside of the lid 13.

Next, a method of using this embodiment will be described. After fixing the tension device body to a winding machine (not shown), the wire P from the supply bobbin is passed through the snell guide 66.

After the wire P is sandwiched by a part of the wire retainer 55, the wire P is wound around the main tension boo 22 about 3/4 times, and further wound around the pulley 40 via the auxiliary tension pulleys 41b and 41a.

The wires P, P ... P wound in this way are supplied to the winding machine as many as the number of windings.

Next, the braking force of the main tension pulley according to the specifications of each winding and the numerical value corresponding to the back tension given to the tension bar are input to the control unit (not shown) by the operation unit (not shown) to guide the winding machine. Then, the stepping motors 200 and 210 of the tension devices are activated to automatically set the brake and the back tension to predetermined values. The change in the tension of the wire P generated in the winding is
The pressure sensor 220 detects it, and supplies it to the control unit to control the operation of the stepping motor 200 to compensate for its influence.

<Effects of the Invention> As described above, the present invention is a tension device that applies a braking torque to a main tension pulley and a back tension to a sub tension pulley to give a constant tension to a moving line. By setting the braking torque given to the and the back tension given to the lever supporting the auxiliary tension pulley to a predetermined value by the stepping motor which is automatically controlled,
As in the prior art, there is an effect that it is not necessary to manually adjust each winding operation according to different winding operation conditions depending on factors such as winding thickness, coating, coil bobbin size, and form.

Therefore, when this embodiment is used, adjustment can be performed quickly and easily with respect to changes in the winding specifications, and it is particularly effective when a large number of various windings are performed, and an automatic winding machine. Combined with this, it has the effect of improving the reliability of the product and improving the work efficiency.

Further, the tension of the wire moving in the winding is detected by a sensor, and the braking torque to the main tension pulley is controlled based on the output of this sensor, so that the varying wire tension in the winding can be effectively compensated. There is an effect.

This is particularly useful for improving the reliability of products that require high-precision finishing.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a tension device according to the present invention. FIG. 2 is a vertical sectional view taken along the line AA in FIG. FIG. 3 is a vertical sectional view taken along the line BB in FIG. FIG. 4 is a rear view showing the inside of the embodiment of FIG. 1 with the back cover removed. FIG. 5 is a vertical sectional view taken along the line CC of FIG. FIG. 6 is an explanatory diagram showing the relationship between the magnet and the magnetic disk. FIG. 7 is a block diagram showing an embodiment of the circuit of the device according to the present invention. FIG. 8 is a schematic diagram showing the basic structure of a conventional tension device used in a winding machine. It is explanatory drawing which shows the basic composition of the tension device used for a general winding machine. 11 ... tension device body 12 ... front cover 12a ... inner protrusion 13 ... back cover 15 ... dial 16 ... magnetic pole shaft 17 ... magnetic pole fixing plate 21 ... disk fixing plate 22 ... main tension pulley 24 ... … Lever shaft 25 …… Swing lever 27 …… Adjustment screw 29 …… Spring hook nut (moving piece) 30 …… Adjustment spring 31 …… Tension shaft 32 …… Tension lever 33 …… Tension lever ring 34 …… Contact roller 35 ...... Tension shaft seat 36 ...... Tension bar 37 ...... Tension bar ring 40 ...... Pulley 41a, 41b ...... Auxiliary pulley 42 ...... V-shaped lever 42a ...... Spring hook hole 43 ...... Contact roller 45 ...... Air cylinder 45a ... ... Air cylinder rod 47 ... Magnetic pole fixing plate mounting screw 48 ... Permanent magnet 49 … Magnetic disk 51 …… Pulley shaft 52 …… Auxiliary pulley mounting part 53 …… Auxiliary pulley mounting part guide 55 …… Line retainer 61 …… Shaft pin 63,64,65 …… Radial bearing 66 …… Snell guide 67 …… Stop ring 70 …… Mark 76 …… Mounting shaft 77 …… Tension device mounting bracket 81 …… Screw 85,86 …… Nut 101 …… Winding machine body 102 …… Bobbin 103 …… Winding 104 …… Idle pulley 105 ...... Nozzle 110 …… Tensioning device main body 111 …… Tension bar shaft 112 …… Back tension spring 114 …… Main tension pulley (brake pulley) 115 …… Tension bar 117 …… Pulley 118 …… Idle pulley 200, 210 …… Stepping motors 201, 202, 203, 211, 21 , 213 ......
Gear 204 ... Torque adjusting ring 205 ... Torque adjusting ring support frame 206 ... Gear mounting screw 214 ... Worm 215 ... Worm wheel 220 ... Pressure sensor

Claims (3)

[Claims] 1. A brake that applies a variable braking torque to a main tension pulley that applies tension to a drawn wire, and a swing end that comes into contact with the wire between the main tension pulley and the winding position, and urges in a direction that applies back tension. In a tensioning device for applying tension to a line to be wound and wound, the moving part being coupled to one end of the spring for applying back tension and for changing the acting force of the spring on the tension bar. A tension device comprising: a spring support member provided; and a motor that is rotationally driven based on input data to move the moving portion to adjust the back tension. 2. The tension device according to claim 1, wherein the acting force on the tension bar is given to a tension lever that rotates integrally with the tension bar via the spring supporting member. 3. A swing lever rotatably provided so as to engage with a tension lever that rotates integrally with the tension bar in a direction that applies the back tension to the tension bar, 2. The tension device according to claim 1, wherein the tension device comprises a moving portion that supports one end of a spring that gives the back tension and that is provided on the swing lever so that a distance from a rotation center of the swing lever can be adjusted.