JPS6311270B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tension applying device that can be used to apply tension to a winding wire in a winding machine or the like.

It has a main pulley to which brake torque is applied, an absorption lever to absorb tension fluctuations, and a sub-pulley installed at its swinging end, and tension is applied to the wire pulled out through the main pulley and sub-pulley. The device is used for coil winding.

The brake torque is generated by applying a band brake to the outer periphery of a disc that rotates together with the main pulley. To adjust the brake torque,
This is done by adjusting the pressure of the band brake. Although such a device applies tension to the windings and can adjust the tension within a certain range, there is a risk that the pressure in the band brake may change over time.

A general object of the present invention is to provide a tension applying device that can apply tension to a winding or the like over a wide range without using the band brake.

The first object of the present invention is to set the steady torque of a non-contact torque generator by a steady torque setting means,
It is an object of the present invention to provide a tension applying device in which the set torque is reduced by the torque correcting means when abnormal tension occurs.

A second object of the present invention is to increase or decrease the rotational force of the absorption lever in accordance with the steady torque by a steady torque setting means, and to reduce or cancel the set torque by the torque correction means when an abnormal tension occurs. An object of the present invention is to provide a granting device.

A third object of the present invention is to provide a tension applying device in which the movement of the end face cam is assisted by an auxiliary spring when the steady torque is reduced by the torque correcting means when abnormal tension occurs.

In order to achieve the first object, the tension applying device according to the present invention includes a main pulley to which brake torque is applied, an absorption lever for absorbing tension fluctuations, and a sub-pulley provided at its swinging end. and a braking torque generating device that applies a braking torque to the main pulley, which is made up of a magnet and a magnetic plate facing each other, and a braking torque generating device that applies a braking torque to the main pulley, and It is rotated and consists of a steady torque setting means for setting a steady interval between the plates, and an end cam assembly supported by the steady torque setting means and brought into contact with an end cam by the suction force of the braking torque generating device. and a transmission device for transmitting the displacement of the absorption lever to the end face cam assembly; The torque setting means sets a steady torque, and the torque correction means reduces the set torque when abnormal tension occurs.

According to the above configuration, tension can be set in a wider range than in conventional devices. Furthermore, since the brake torque is generated without contact by the opposing magnets and magnetic plates, there is no fear that the brake torque applied to the main pulley will change over time.

The present invention will be described in more detail below with reference to the drawings and the like. The embodiment device described in detail below can achieve the first, second, and third objects.

FIG. 1 is a front view of an embodiment of the tension applying device according to the present invention, FIG. 2 is a rear view of the embodiment of the tension applying device, and FIG. 3 is a side sectional view of the embodiment of the tension applying device. .

The main body case 1 is composed of a housing part 1b, a front plate part 1a, and a projection 1c for fixing the main body case 1 to a winder or the like. An absorption lever 15 that supports the main pulley 18 and the sub-pulley 16, and a wire clamping case 20 are arranged on the front surface of the front plate portion 1a.
Wire clamping case 20 As shown in FIG. 3, it consists of two cases 20a and 20b, into which felts 21a and 21b are joined, respectively. Case 2
0a is connected to a wire clamp opening/closing button 23, and the opening/closing button 23 is connected to the case 20 by a wire clamp opening/closing button spring 22.
It is biased in the direction of closing a and 20b.

On the back side of the housing part 1b, there is a brake torque main adjustment dial 2 included in a steady torque setting means for setting a steady state interval between the magnet and the magnetic plate, which will be described later.
A wire clamp opening/closing button 23 and the like are arranged.

The main pulley 18 is fixed to a main pulley shaft 19 and is rotatably supported by the front plate portion 1a of the main body case 1 by this shaft 19. At the other end of the main pulley shaft 19,
A disc-shaped magnetic plate 17 included in a braking torque generator that applies braking torque to the main pulley 19 is fixed.

As shown in FIG.
The coil bobbin is wound twice through the sub pulley 16 and connected to a coil bobbin which is rotated by a winding machine (not shown). As the coil bobbin rotates, the wire P is drawn out and wound around the coil bobbin.

By applying magnetic force to the magnetic plate 17, the main pulley 1
An annular permanent magnet 7 that applies braking torque to 9
is fixed to the magnet stand 8. Permanent magnet 7 is horizontally magnetized in FIG. 3, and magnet base 8 forms part of a magnetic circuit. The magnet stand 8 is fixed to a magnet stand shaft 5, and the magnet stand shaft 5 is supported by a magnet stand bearing 29 so as to be rotatable and movable. An end cam 27 included in the torque correction means is fixed to the other end of the magnet shaft 5.

Cam surface 27a of this end cam 27 (see Fig. 5)
is the cam surface 2 formed on the end surface of the magnet stand bearing 29
9a to determine the torque correction position from the steady torque generation position.

The steady torque setting means for setting the gap between the permanent magnet 7 and the magnetic plate 17 during steady state includes a brake torque main adjustment dial 2 that is screwed to the housing 1b so as to be movable forward and backward, and a magnet stand supported by the brake torque main adjustment dial 2. Bearing 2
9. Consists of a linear guide pin 10 that limits the rotation of the magnet stand bearing 29.

When the brake torque main adjustment dial 2 is rotated, the magnet stand bearing 29, which is connected to the main adjustment dial 2 by a retaining ring 26, is linearly guided by the linear guide pin 10 and moved forward and backward.

The integral assembly of the magnet 7, magnet base 8, magnet base shaft 5, and end cam 27 is biased to the right in FIGS. 3 and 4 due to the attractive force between the magnet 7 and the magnetic plate 17. The rightward movement limit position is between the cam surface 27a of the end cam 27 and the magnet stand bearing 29.
It is regulated by the engagement position with the cam surface 29a formed on the end surface of. As shown in FIG. 5, the steady torque generation position is such that the maximum height position of the cam surface 27a of the end cam 27 contacts the minimum height (flat surface) of the cam surface 29a formed on the end surface of the magnet stand bearing 29. In other words, the magnet 7 is closest to the magnetic plate 17 at the set position of the brake torque main adjustment dial 2 at that time. This closest position can be arbitrarily adjusted by rotating the main adjustment dial 2. When the main adjustment dial 2 is screwed in most internally, the steady torque generated by the torque generating device becomes maximum, and when the distance between the magnet and the magnetic plate is increased by pulling out the main adjustment dial 2, the steady torque decreases.

Absorption lever 15 supporting sub-pulley 16 at one end
is fixed to a shaft 24 rotatably supported by the housing 1b. A crank lever 14 is fixed to the other end of this shaft 24. crank lever 1
In FIG. 6, a spring 25 is applied to the cam lever 11 provided between one end of the crank lever 4 and the housing 1a to correct the rotation of the crank lever 14 in the clockwise direction. As shown in FIG. 1, the wire from a supply bobbin (not shown) is sandwiched between wire clamps 20, wound around the main pulley 18 twice, and rotated by a winding machine (not shown) via the sub pulley 16. The wire P is connected to the coil bobbin, and as the coil bobbin rotates, the wire P is drawn out and wound around the coil bobbin. At this time,
The auxiliary pulley 6, whose rotation is corrected by the spring 25, moves in accordance with the variation in the tension of the wire between the main pulley 18 and the coil bobbin (not shown), and absorbs the variation in tension while maintaining balance.

The other end of the crank lever 14 is connected to the electromagnet stand 8 by a connecting lever 13, as shown in FIG. crank lever 14, connection lever 13,
The electromagnet stand 8 and the magnet stand shaft 9 form a transmission device that transmits rotational force to the end cam assembly.

The cam lever 11 is shown in FIGS. 3, 4 and 6.
As can be seen from the figure, it is pivotally supported on a linear guide pin 10, is rotatable around this linear guide pin 10, and is brought into contact with the cam surface of an adjusting cam 6 that adjusts the rotational behavior of the absorption lever by means of the spring 25. be made to follow. The adjustment cam 6 is fixed to the brake torque main adjustment dial 2 with a screw 30 and rotates together with the brake torque main adjustment dial 2.

Figures 6 and 7 are explanatory diagrams showing the relationship between the steady torque adjustment cam and the cam lever. Figure 6 shows a state where an intermediate torque is set using the brake torque main adjustment dial, and Figure 7 shows a state where the brake torque main adjustment dial is set to an intermediate torque. The dial is shown with the lowest torque set. Figures 6 and 7 are explanatory diagrams showing the relationship between the steady torque adjustment cam and the cam lever. Figure 6 shows a state where an intermediate torque is set using the brake torque main adjustment dial, and Figure 7 shows a state where the brake torque main adjustment dial is set to an intermediate torque. The dial is shown with the lowest torque set.

The state shown in FIG. 7 corresponds to a state in which the steady state interval between the magnet 7 and the magnetic plate 17 is set to be the largest by the steady torque setting means, and corresponds to a state in which the rotational behavior of the absorption lever 15 is the weakest. . When the relationship between the steady torque adjustment cam and the cam lever is in the state shown by the broken line in FIG. 7, this corresponds to a state in which the steady state interval between the magnet 7 and the magnetic plate 17 is set to the smallest by the steady torque setting means, The rotational behavior of the absorption lever 15 is at its strongest.

An assisting spring receiver 4 is fixed to a housing 1a that is a part of the main body case 1 so as to surround a brake force adjustment table bearing 29. A support spring 3 is inserted between the thrust bearing 28 and the support spring receiver 4, and urges the end cam 27 to the left in FIGS. 3 and 4. This biasing force is changed in accordance with the set value of the steady torque, but is always smaller than the attractive force between the magnet 7 and the magnetic plate 17 in the steady state. Therefore, in a normal state, it is in a compressed state due to the attractive force, and as will be described later, when the distance between the magnet 7 and the magnetic plate 17 is about to be expanded by the end cam in an abnormal situation, it assists the expansion.

Next, the operation of the apparatus of the embodiment will be explained together with the detailed configuration.

First, the device is fixed to the winding machine with the mounting part 1c, and as described above, the wire P from the supply bobbin (not shown) is clamped with the wire clamp 20, wound around the main pulley 18 twice, and then passed through the sub pulley 16. It is connected to a coil bobbin rotated by a winding machine (not shown).

The tension required for the winding is determined by turning the brake torque main adjustment dial 2 and setting the distance between the opposing magnet 7 and magnetic plate 17. In this example, the steady braking torque of the main pulley is 2Kgcm to 0.2Kg.
Can be set to any value in cm. This value setting value is determined by the diameter of the winding wire, the speed of the winding wire, etc. The maximum steady-state braking torque is obtained when the distance between the magnet 7 and the magnetic plate 17 is minimized, at which time the spring 25 provides the absorption lever 15 with the maximum rotational behavior.
At this time, the assisting spring 3 is in the most compressed state. The minimum steady braking torque is the magnet 7 and magnetic plate 1.
7, the spring 25 gives the absorption lever 15 a minimum rotational habit. At this time, the assisting spring 3 is in the least compressed state.

When the winding machine is started with the optimum steady braking torque set, the wire is drawn out by the winding.

When the tension of the winding between the main pulley 18 and the coil bobbin rotated by the winding machine is adjusted to the set value, the sub pulley 16 is at the position shown as a2 in FIG. , the sub pulley 16 moves in the direction of the point indicated as a1 in FIG.

If for some reason the tension in the winding between the main pulley 18 and the coil bobbin rotated by the winding machine becomes greater than a set value, the winding moves in the direction of the point a3 in FIG. 1. When the tension becomes abnormally large, the center of the sub pulley 16 approaches the point indicated by a3.

The position of the absorption lever 15 is transmitted to the cam from the transmission device, but the center of the sub pulley 16 is a1, a
When it is near 2, the axis is only rotated. When the center of the sub pulley 16 approaches a3, the end cam 27a comes into contact with the cam part 29a of the magnet stand bearing 29, moving the magnet 7 away from the magnetic plate 17, and changing the interval between them to the normal interval. Make the correction larger to reduce the braking torque. This operation makes the main pulley 18 lighter, making it easier to draw out the wire and reducing tension.

As explained above, the device according to the present invention can arbitrarily set the steady torque of the non-contact torque generator using the steady torque setting means, and when abnormal tension occurs, the set torque is reduced by the torque correcting means to stabilize the torque. It became possible to apply tension.

Further, in the device according to the present invention, the rotational force of the absorption lever can be increased or decreased in accordance with the steady torque by the steady torque setting means, and the set torque can be reduced or killed by the torque correction means when abnormal tension occurs. .

Further, the device according to the present invention enables smooth adjustment by using the assisting spring to assist the movement of the end face cam when the steady torque is reduced by the torque correcting means when abnormal tension occurs.

Although the application of the winding machine has been described in detail above, it can be widely applied to devices that require applying a constant tension to a moving wire.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the tension applying device according to the present invention, FIG. 2 is a rear view of the embodiment of the tension applying device, and FIG. 3 is a side sectional view of the embodiment of the tension applying device. FIG. 4 is an exploded view of the main parts of the tension applying device according to the embodiment, FIG. 5 is a partial view of the end cam assembly taken out, and FIGS. 6 and 7.
The figure is an explanatory diagram showing the relationship between the steady torque adjustment cam and the cam lever, and Figure 6 shows a state in which an intermediate torque is set by the brake torque main adjustment dial;
FIG. 7 shows a state in which the minimum torque is set using the brake torque main adjustment dial. 1... Main body case, 1a... Front plate, 1b... Housing, 2... Brake torque main adjustment dial, 3...
... Helping spring, 4 ... Helping spring receiver, 5 ... Magnet stand shaft, 6 ... Steady torque adjustment cam, 7 ... Magnet, 8
... Magnet stand, 9 ... Connection pin, 10 ... Straight guide pin, 11 ... Cam lever, 12 ... Connection pin,
13...Connection lever, 14...Crank lever,
15... Absorption lever, 16... Sub-pulley, 17...
...Magnetic plate, 18...Main pulley, 19...Main pulley shaft, 20...Wire clamp case, 21...Felt,
22...Wire clamp opening/closing button spring, 23...Wire clamp opening/closing button, 24...Sub pulley shaft, 25...Absorption lever spring, 26...Retaining ring, 27...Thrust cam, 2
8... Thrust bearing, 29... Magnet stand bearing,
30... Adjustment cam set screw.

Claims (1)

[Claims] 1. A main pulley to which brake torque is applied, an absorption lever for absorbing tension fluctuations, and a sub-pulley provided at its swinging end, and a line drawn out through the main pulley and the sub-pulley. A tensioning device that applies tension to the main pulley includes a braking torque generator that applies braking torque to the main pulley, which is made up of opposing magnets and magnetic plates, and a steady torque setting that sets the interval between the magnet and the magnetic plate during a steady state. and an end cam assembly supported by the steady torque setting means and brought into contact with the end cam by the attraction force of the braking torque generating device, and the magnet is set by the steady torque setting means when rotated. and a transmission device that transmits the displacement of the absorption lever to the end face cam assembly, and the steady torque setting means sets the steady torque to prevent abnormal tension from occurring. A tension applying device characterized in that the tension applying device is configured such that the set torque is sometimes reduced by the torque correcting means. 2. The tension applying device according to claim 1, wherein the magnetic plate of the braking torque generating device is configured to be rotatable together with the main pulley and receive braking torque from a magnet on the fixed side. 3 It has a main pulley to which brake torque is applied, an absorption lever for absorbing tension fluctuations, and a sub-pulley provided at its swinging end, and tension is applied to the line pulled out via the main pulley and sub-pulley. The applying device includes a braking torque generating device that is made up of a magnet and a magnetic plate facing each other and applies braking torque to the main pulley, and a steady torque setting device that moves forward and backward by rotation to set a steady interval between the magnet and the magnetic plate. , an end face cam assembly supported by the steady torque setting means and having an end face cam brought into contact with it by the attractive force of the braking torque generating device; a torque correction means for enlarging the gap between the plates in a steady state; a transmission device for transmitting the displacement of the absorption lever to the end cam; and a transmission device for transmitting the displacement of the absorption lever to the end face cam; a spring that increases or decreases the rotational force of the absorption lever in response to the steady torque by rotation during setting; and a spring that increases or decreases the rotational force of the absorption lever in response to the steady torque by the steady torque setting means; A tension applying device characterized in that the torque correcting means is configured to reduce the set torque when abnormal tension occurs. 4. The tension applying device according to claim 2, wherein the magnetic plate of the braking torque generating device is configured to be rotatable together with the main pulley and receive braking torque from a magnet on the fixed side. 5 It has a main pulley to which brake torque is applied, an absorption lever for absorbing tension fluctuations, and a sub-pulley provided at its swinging end, and tension is applied to the line pulled out via the main pulley and sub-pulley. The applying device includes a braking torque generating device that applies braking torque to the main pulley, which is made up of a magnet and a magnetic plate facing each other, a steady torque setting device that sets an interval between the magnet and the magnetic plate during a steady state, and the steady torque. The end face cam assembly is supported by a setting means, and the end face cam is brought into contact with the end face cam by the attractive force of the braking torque generating device, and when rotated, the constant between the magnet and the magnetic plate is set by the steady torque setting means. a torque correcting means for expanding the regular interval; a transmission device for transmitting the displacement of the absorption lever to the end cam; and a transmission device for transmitting the displacement of the absorption lever to the end cam; an assisting spring provided to assist the movement of expanding the interval during steady state; the steady torque setting means sets the steady torque; when abnormal tension occurs, the torque correcting means reduces the steady torque;
A tension applying device characterized in that the tension applying device is configured such that the movement of the end face cam during the reduction is assisted by the auxiliary spring. 6. The tension applying device according to claim 5, wherein the magnetic plate of the braking torque generating device is configured to be rotatable together with the main pulley and receive braking torque from a magnet on the fixed side.